CN221921849U - Transmission mechanism and lifting door - Google Patents

Abstract

The utility model relates to the technical field of door bodies, and discloses a transmission mechanism and a lifting door. The transmission wheel set comprises a first top wheel assembly, a second top wheel assembly, a first bottom wheel assembly and a second bottom wheel assembly, wherein the first top wheel assembly comprises a first top wheel and a second top wheel which can rotate relative to each other, the second top wheel assembly and the first top wheel assembly are arranged at intervals, the first bottom wheel assembly is positioned below the first top wheel assembly, and the second bottom wheel assembly is positioned below the second top wheel assembly; the transmission chain is wound on the first top wheel assembly, the second top wheel assembly, the first bottom wheel assembly and the second bottom wheel assembly, wherein the transmission chain is provided with a first side part and a second side part which are opposite, the first side part is wound on the first top wheel, and the second side part is wound on the second top wheel. Through the arrangement, the structure of the transmission mechanism is simplified, the transmission chain is convenient to assemble, and has higher adaptability, convenience in later maintenance and lower cost.

Description

Transmission mechanism and lifting door

Technical Field

The utility model relates to the technical field of door bodies, in particular to a transmission mechanism and a lifting door.

Background

The lifting door comprises a transmission mechanism and a door plate assembly, wherein the transmission mechanism is connected with the door plate assembly and is used for driving the door plate assembly to ascend or descend.

Generally, the drive mechanism is including first top wheel, second top wheel, the transmission shaft, first return pulley, the second return pulley, first chain and second chain, the both ends of transmission shaft are connected with first top wheel and second top wheel respectively, first return pulley and second return pulley are located the below of first top wheel and second top wheel respectively, first chain is around locating first top wheel and first return pulley, the second chain is around locating second top wheel and second chain, first top wheel, first return pulley and first chain are located the left side of door plant subassembly, first chain is connected with the left side of door plant subassembly through the connecting piece, second top wheel, second return pulley and second chain are located the right side of door plant subassembly, the second chain is connected with the right side of door plant subassembly through the connecting piece. The transmission shaft is used as a power transmission element between the first top wheel and the second top wheel and used for synchronizing the rotation of the first top wheel and the second top wheel so as to synchronously drive the first chain and the second chain to run, thereby realizing the ascending or descending of the door plate assembly.

However, the transmission shaft has a relatively large mass, and a corresponding coupling and other switching structures need to be configured during installation, so that the installation and maintenance of the transmission shaft are relatively complex.

Disclosure of utility model

The embodiment of the utility model aims to provide a transmission mechanism and a lifting door, which are used for solving the technical problems of complex installation and maintenance of a power transmission element in the transmission mechanism and low suitability in the prior art.

In a first aspect, the present utility model provides a transmission mechanism comprising:

The transmission wheel set comprises a first top wheel assembly, a second top wheel assembly, a first bottom wheel assembly and a second bottom wheel assembly, wherein the first top wheel assembly comprises a first top wheel and a second top wheel which can rotate relative to each other, the second top wheel assembly and the first top wheel assembly are arranged at intervals, the first bottom wheel assembly is positioned below the first top wheel assembly, and the second bottom wheel assembly is positioned below the second top wheel assembly;

The transmission chain is wound on the first top wheel assembly, the second top wheel assembly, the first bottom wheel assembly and the second bottom wheel assembly to transmit power among the first top wheel assembly, the second top wheel assembly, the first bottom wheel assembly and the second bottom wheel assembly, wherein the transmission chain is provided with a first side part and a second side part which are opposite, the first side part is wound on the first top wheel, and the second side part is wound on the second top wheel.

Optionally, the second top wheel assembly comprises a third top wheel and a fourth top wheel fixed relative to each other;

the transmission chain comprises a first chain and a second chain, the first chain is provided with a first side part and a second side part, two ends of the first chain are respectively wound on a third top wheel and a first bottom wheel assembly, and two ends of the second chain are respectively wound on a fourth top wheel and a second bottom wheel assembly.

Optionally, the second top wheel assembly comprises a third top wheel and a fourth top wheel rotatable relative to each other;

The two ends of the transmission chain are respectively wound on the first bottom wheel assembly and the second bottom wheel assembly, the first side part is wound on the first top wheel and the third top wheel, and the second side part is wound on the second top wheel and the fourth top wheel.

Optionally, the first top wheel assembly further comprises a first rotating shaft, and the first top wheel and the second top wheel are respectively sleeved on the first rotating shaft;

The second top wheel assembly further comprises a second rotating shaft, and the third top wheel and the fourth top wheel are respectively sleeved on the second rotating shaft.

Optionally, the transmission mechanism further comprises a first tensioning device for adjusting the position of the first bottom wheel assembly, and/or a second tensioning device for adjusting the position of the second bottom wheel assembly, wherein the first tensioning device is connected with the first bottom wheel assembly, and the second tensioning device is connected with the second bottom wheel assembly.

Optionally, the first bottom wheel assembly comprises a first bottom wheel and a first connecting shaft, the first bottom wheel is sleeved on the first connecting shaft, and the first bottom wheel is connected with the transmission chain;

The first tensioning device comprises a first base and a first adjusting piece, the first adjusting piece is connected with the first connecting shaft, the first adjusting piece is connected with the first base in an adjustable mode, and the first adjusting piece can adjust the height position of the first connecting shaft;

the second bottom wheel assembly comprises a second bottom wheel and a second connecting shaft, the second bottom wheel is sleeved on the second connecting shaft, and the second bottom wheel is connected with the transmission chain;

The second tensioning device comprises a second base and a second adjusting piece, the second adjusting piece is connected with the second connecting shaft, the second adjusting piece is connected with the second base in an adjustable mode, and the second adjusting piece can adjust the height position of the second connecting shaft.

Optionally, the first connecting shaft is provided with a first guiding structure, the first base is provided with a second guiding structure, and the first guiding structure is in guiding fit with the second guiding structure so as to guide the first connecting shaft to adjust the height position along a preset direction;

The second connecting shaft is provided with a third guide structure, the second base is provided with a fourth guide structure, and the third guide structure is in guide fit with the fourth guide structure so as to guide the second connecting shaft to adjust the height position along the preset direction.

Optionally, the first base comprises two first base bodies arranged at intervals, the two first base bodies are provided with first guide structures, and each first guide structure comprises two first guide bodies arranged at intervals;

Two ends of the first connecting shaft extend into the space between the two first guide bodies on the two first seat bodies respectively, second guide structures are arranged on the outer side walls of the two ends of the first connecting shaft, each second guide structure comprises two first notch grooves which are oppositely arranged, and the two first notch grooves are in guide fit with the corresponding two first guide bodies respectively so as to guide the first connecting shaft to adjust the height position along the preset direction;

The second base comprises two second base bodies which are arranged at intervals, the two second base bodies are provided with third guide structures, and each third guide structure comprises two second guide bodies which are arranged at intervals;

the both ends of second connecting axle stretch into respectively between two second guide bodies on two second pedestal, and the both ends lateral wall of second connecting axle all is equipped with fourth guide structure, and each fourth guide structure is including two second incision grooves that set up in opposite directions, and two second incision grooves are respectively with two second guide body direction cooperations that correspond to guide the second connecting axle along predetermineeing the direction height position of adjusting.

Optionally, the transmission mechanism further comprises a driving motor for driving the transmission chain to run, and the driving motor is connected with the transmission wheel set.

In a second aspect, the utility model also provides a lifting door, which comprises a door frame upright post, a door plate assembly and the transmission mechanism, wherein the transmission mechanism is arranged on the door frame upright post, and transmission chains of the transmission mechanism are connected with the left side and the right side of the door plate assembly.

Compared with the prior art, in the embodiment of the utility model, in the first aspect, the transmission chain is used as the power transmission element of the first top wheel assembly and the second top wheel assembly, and when the transmission chain is connected with the first top wheel assembly and the second top wheel assembly, the transmission chain does not need to be provided with a switching structure such as a coupler, so that the structure of the transmission mechanism is simplified, the quality of the transmission chain is lighter and more convenient to assemble, the later maintenance is convenient, and the cost is lower; in a second aspect, the first side portion and the second side portion of the driving chain are respectively wound around the first top wheel and the second top wheel which can rotate relative to each other, so that the first top wheel and the second top wheel can respectively drive the first side portion and the second side portion to move in opposite directions, power is transmitted among the first top wheel assembly, the second top wheel assembly and the first bottom wheel assembly, the first side portion and the second side portion enable power transmission in the horizontal direction between the first top wheel assembly and the second top wheel assembly to be converted, that is, power transmission in the vertical direction between the first top wheel assembly and the first bottom wheel assembly can be achieved through only one driving chain, one chain is not required to be arranged between the first top wheel assembly and the second top wheel assembly, and another chain is not required to be arranged between the first top wheel assembly and the first bottom wheel assembly, and therefore the chain structure is simplified.

In addition, the chain structure is used as a standard component, the transmission efficiency is higher, the bearing capacity is stronger, and when the width of the transmission mechanism is correspondingly adjusted according to the installation width requirement, the transmission mechanism can be matched with the distance between the first top wheel assembly and the second top wheel assembly by cutting or lengthening the chain, so that the transmission mechanism has higher adaptability.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures are not to be considered limiting, unless expressly stated otherwise.

FIG. 1 is a perspective view of a transmission mechanism according to an embodiment of the present utility model;

FIG. 2 is a schematic illustration of the transmission mechanism shown in FIG. 1;

FIG. 3 is an exploded view of the transmission shown in FIG. 2;

FIG. 4 is a schematic view of a transmission mechanism according to another embodiment of the present utility model;

FIG. 5 is a schematic view of a transmission mechanism according to another embodiment of the present utility model;

FIG. 6 is an exploded view of a portion of the transmission shown in FIG. 2;

FIG. 7 is a structural perspective view of the first bottom wheel assembly and first tensioner assembly shown in FIG. 6;

Fig. 8 is a schematic structural view of a lift gate according to another embodiment of the present utility model.

Description of the added reference numerals:

Detailed Description

In order that the utility model may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. It will be understood that when an element is referred to as being "connected" to another element, it can be directly on the other element or intervening elements may be present. The terms "upper," "lower," "left," "right," "upper," "lower," "top," and "bottom," and the like, as used herein, refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience in describing the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Referring to fig. 1, fig. 1 is a perspective view of a driving mechanism 100 according to an embodiment of the present utility model, and the embodiment of the present utility model provides a driving mechanism 100, where the driving mechanism 100 may be applied to a lift door, the driving mechanism 100 is connected to a door panel assembly of the lift door, and the driving mechanism 100 is used for transmitting power to the door panel assembly to drive the door panel assembly to ascend or descend.

Of course, the transmission mechanism 100 may be applied to other devices or apparatuses, and is not limited to a lifting door, for example, a transfer robot, where the transmission mechanism 100 is connected to a fork assembly of the transfer robot, and the transmission mechanism 100 is used to transmit power to the fork assembly to drive the fork assembly to lift or lower.

In describing the structure of the transmission mechanism 100, an example in which the transmission mechanism 100 is applied to a liftgate will be described.

Referring to fig. 2 and 3 together, fig. 2 is a schematic structural view of the transmission mechanism 100 shown in fig. 1, and fig. 3 is an exploded structural view of the transmission mechanism 100 shown in fig. 2. In the embodiment of the present utility model, the transmission mechanism 100 includes a transmission pulley set 10 and a transmission chain 20.

The driving wheel set 10 includes a first top wheel assembly 11, a second top wheel assembly 12, a first bottom wheel assembly 13, and a second bottom wheel assembly 14, the first top wheel assembly 11 includes a first top wheel 111 and a second top wheel 112 that are rotatable relative to each other, the second top wheel assembly 12 is disposed at a distance from the first top wheel assembly 11, the first bottom wheel assembly 13 is located below the first top wheel assembly 11, and the second bottom wheel assembly 14 is located below the second top wheel assembly 12.

The drive chain 20 is wound around the first top wheel assembly 11, the second top wheel assembly 12, the first bottom wheel assembly 13, and the second bottom wheel assembly 14 to transmit power between the first top wheel assembly 11, the second top wheel assembly 12, the first bottom wheel assembly 13, and the second bottom wheel assembly 14.

The drive chain 20 has a first side 201 and a second side 202 opposite to each other, the first side 201 is wound around the first top wheel 111, and the second side 202 is wound around the second top wheel 112.

In the embodiment of the present utility model, in the first aspect, by using the transmission chain 20 as the power transmission element of the first top wheel assembly 11 and the second top wheel assembly 12, when the transmission chain 20 is connected with the first top wheel assembly 11 and the second top wheel assembly 12, no adapting structure such as a coupling is required, so that the structure of the transmission mechanism 100 is simplified, and the quality of the transmission chain 20 is lighter and more convenient to assemble, and the transmission chain is convenient for later maintenance and has lower cost; in a second aspect, the first side 201 and the second side 202 of the drive chain 20 are respectively wound around the first top wheel 111 and the second top wheel 112 which are capable of rotating relative to each other, allowing the first top wheel 111 and the second top wheel 112 to drive the first side 201 and the second side 202 to move in opposite directions respectively, so as to transmit power between the first top wheel assembly 11, the second top wheel assembly 12 and the first bottom wheel assembly 13, the first side 201 and the second side 202 convert the power transmission in the horizontal direction between the first top wheel assembly 11 and the second top wheel assembly 12 into the power transmission in the vertical direction between the first top wheel assembly 11 and the first bottom wheel assembly 13, that is, the power transmission between the first bottom wheel assembly 13, the first top wheel assembly 11 and the second top wheel assembly 12 can be realized only by one drive chain 20, without providing a chain between the first top wheel assembly 11 and the second top wheel assembly 12, and providing another chain between the first top wheel assembly 11 and the first bottom wheel assembly 13, thereby simplifying the structure.

In addition, the chain structure is used as a standard component, the transmission efficiency is higher, the bearing capacity is stronger, and when the width of the transmission mechanism 100 is correspondingly adjusted according to the installation width requirement, the transmission mechanism 100 has higher adaptability by cutting or lengthening the chain to enable the chain structure to adapt to the distance between the first top wheel assembly 11 and the second top wheel assembly 12.

In the embodiment of the present utility model, the first top wheel assembly 11, the second top wheel assembly 12 and the first bottom wheel assembly 13 may be in transmission connection through the same chain, and the second top wheel assembly 12 and the second bottom wheel assembly 14 may be wound by another chain to achieve transmission connection between the second top wheel assembly 12 and the second bottom wheel assembly 14, that is, the transmission chain 20 is a split structure, which includes two chains each having a closed loop. Of course, a chain wound between the first top wheel assembly 11, the second top wheel assembly 12 and the first bottom wheel assembly 13 may also be wound around the second bottom wheel assembly 14 at the same time to achieve a driving connection between the second top wheel assembly 12 and the second bottom wheel assembly 14, that is, the driving chain 20 is an integral structure, which is a single chain in a closed loop.

As shown in fig. 3, in some embodiments, the second top wheel assembly 12 includes a third top wheel 121 and a fourth top wheel 122 that are fixed relative to each other such that the third top wheel 121 and the fourth top wheel 122 are rotated in unison during power transfer.

The drive chain 20 comprises a first chain 21 and a second chain 22, the first chain 21 having the first side 201 and the second side 202 described above. Both ends of the first chain 21 are respectively wound around the third top wheel 121 and the first bottom wheel assembly 13, and simultaneously, the first side 201 and the second side 202 are respectively wound around the first top wheel 111 and the second top wheel 112, so that the transmission connection among the first top wheel assembly 11, the second top wheel assembly 12 and the first bottom wheel assembly 13 is realized. The second chain 22 is wound around the fourth top wheel 122 and the second bottom wheel assembly 14 at both ends thereof, thus effecting a drive connection between the second top wheel assembly 12 and the second bottom wheel assembly 14.

In the present embodiment, by separately providing the first chain 21 and the second chain 22, the transmission connection between the first top wheel assembly 11, the second top wheel assembly 12, the first bottom wheel assembly 13 and the second bottom wheel assembly 14 is realized, and when one of the first top wheel assembly 11, the second top wheel assembly 12, the first bottom wheel assembly 13 and the second bottom wheel assembly 14 is driven to rotate, the rest can be simultaneously rotated under the drive of the first chain 21 and the second chain 22, thereby realizing the power cycle transmission of the transmission mechanism 100.

Specifically, as shown in fig. 1, taking the second top wheel assembly 12 as a driving member and the first top wheel assembly 11, the first bottom wheel assembly 13 and the second bottom wheel assembly 14 as driven members, the operation of the transmission mechanism 100 of the present embodiment will be exemplarily described: when the third top wheel 121 and the fourth top wheel 122 are driven to rotate synchronously in the counterclockwise direction, the third top wheel 121 drives the first top wheel 111 to rotate in the counterclockwise direction through the first side 201 of the first chain 21, the first top wheel 111 drives the first bottom wheel assembly 13 to rotate in the counterclockwise direction through the first side 201 of the first chain 21, the first bottom wheel assembly 13 drives the second top wheel 112 to rotate in the clockwise direction through the second side 202 of the first chain 21, and meanwhile, the fourth top wheel 122 drives the second bottom wheel assembly 14 to rotate in the counterclockwise direction through the second chain 22, so that the power cycle transmission of the transmission mechanism 100 is realized.

As shown in fig. 2 and 3, in some embodiments, the first top wheel assembly 11 further includes a first rotating shaft 113, the first top wheel 111 and the second top wheel 112 are respectively sleeved on the first rotating shaft 113, the first top wheel 111 and the second top wheel 112 can rotate around the axis of the first rotating shaft 113 along opposite directions, and the first rotating shaft 113 is used for being mounted on a door frame upright of a lift door so as to support the first top wheel 111 and the second top wheel 112.

The second top wheel assembly 12 further includes a second rotating shaft 123, the third top wheel 121 and the fourth top wheel 122 are respectively sleeved on the second rotating shaft 123, the third top wheel 121 and the fourth top wheel 122 can rotate in the same direction around the axis of the second rotating shaft 123, and the second rotating shaft 123 is used for being mounted on a door frame upright post of the lifting door so as to support the third top wheel 121 and the fourth top wheel 122.

In this embodiment, only one rotation shaft is required for the first top wheel 111 and the second top wheel 112, and only one rotation shaft is required for the third top wheel 121 and the fourth top wheel 122, so that the installation on the door frame upright of the lifting door can be realized, and four rotation shafts are not required to be provided for sleeving the first top wheel 111, the second top wheel 112, the third top wheel 121 and the fourth top wheel 122 respectively, thereby simplifying the structures of the first top wheel assembly 11 and the second top wheel assembly 12; moreover, by sleeving the first top wheel 111 and the second top wheel 112 on the same rotating shaft and sleeving the third top wheel 121 and the fourth top wheel 122 on the same rotating shaft, the structure of the first top wheel assembly 11 and the second top wheel assembly 12 can be more compact, and the occupied space of the first top wheel assembly 11 and the second top wheel assembly 12 can be saved.

In a specific implementation process, the first rotating shaft 113 and the second rotating shaft 123 may be mounted on a door frame upright of the lift door through bearing blocks, so that the first rotating shaft 113 may rotate around its own axis, and the second rotating shaft 123 may rotate around its own axis.

Wherein the axes of the first rotation shaft 113 and the second rotation shaft 123 are parallel.

As shown in fig. 3, in some embodiments, the first top wheel 111 is fixed relative to the first shaft 113, and the first top wheel 111 and the first shaft 113 can rotate synchronously about the axis of the first shaft 113; the second top wheel 112 is rotatably connected to the first rotating shaft 113, and the second top wheel 112 can rotate around the axis of the first rotating shaft 113 relative to the first rotating shaft 113. The third top wheel 121 and the fourth top wheel 122 are fixed relative to the second rotating shaft 123, and the third top wheel 121, the fourth top wheel 122 and the second rotating shaft 123 can synchronously rotate around the axis of the second rotating shaft 123.

In this embodiment, by fixing the first top wheel 111 to the first rotating shaft 113, and fixing the third top wheel 121 and the fourth top wheel 122 to the second rotating shaft 123, when the first top wheel 111 and the third top wheel 121 or the fourth top wheel 122 synchronously rotate via the transmission chain 20, the first rotating shaft 113 and the second rotating shaft 123 can correspondingly synchronously rotate, so that the first belt rope wound on the first rotating shaft 113 synchronously drives the first spring pull rope and rebounds, and the second belt rope wound on the second rotating shaft 123 synchronously drives the second spring pull rope and rebounds, thereby balancing the gravity of the door panel assembly during the lifting or lowering process of the door panel assembly.

The first belt rope and the first spring are elastic balancing devices which are arranged corresponding to the first rotating shaft, the second belt rope and the second spring are elastic balancing devices which are arranged corresponding to the second rotating shaft, and the elastic balancing devices are used for balancing the gravity of the door plate assembly in the ascending or descending process of the door plate assembly. The elastic balancing device is an existing structure and will not be described in detail herein.

In a specific implementation process, the second top wheel 112 may be rotatably connected to the first shaft 113 through a bearing, specifically, the bearing is sleeved on the first shaft 113, and the second top wheel 112 is sleeved on the bearing, that is, the bearing is located between the circumferential inner side of the second top wheel 112 and the circumferential outer side of the first shaft 113, so that the second top wheel 112 may rotate around the axis of the first shaft 113 relative to the first shaft 113 through the bearing.

Since the first top wheel 111 and the second top wheel 112 are capable of rotating relative to each other, in other embodiments, the first top wheel 111 and the second top wheel 112 may be split, i.e., the first top wheel 111 and the second top wheel 112 may be mounted on a door frame pillar of a lift door by different rotational shafts.

Specifically, the number of the first rotating shafts 113 is two, the two first rotating shafts 113 are staggered, the first top wheel 111 is sleeved on one of the two first rotating shafts 113, and the second top wheel 112 is sleeved on the other of the two first rotating shafts 113.

Wherein the axial directions of the two first rotating shafts 113 are parallel.

Further, since the third top wheel 121 and the fourth top wheel 122 are fixed relative to each other, the third top wheel 121 and the fourth top wheel 122 are coaxially disposed in order to ensure synchronous rotation of the third top wheel 121 and the fourth top wheel 122.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a transmission mechanism 100 according to another embodiment of the utility model. In some embodiments, the second top wheel assembly 12 includes a third top wheel 121 and a fourth top wheel 122 that are rotatable relative to each other, allowing the third top wheel 121 and the fourth top wheel 122 to be rotatable in opposite directions.

The two ends of the transmission chain 20 are respectively wound on the first bottom wheel assembly 13 and the second bottom wheel assembly 14, the first side 201 is wound on the first top wheel 111 and the third top wheel 121, and the second side 202 is wound on the second top wheel 112 and the fourth top wheel 122.

In this embodiment, only one chain is required to be wound around the first top wheel assembly 11, the second top wheel assembly 12, the first bottom wheel assembly 13 and the second bottom wheel assembly 14 at the same time, so that the transmission connection among the first top wheel assembly 11, the second top wheel assembly 12, the first bottom wheel assembly 13 and the second bottom wheel assembly 14 is realized, and the structure of the transmission chain 20 is simplified. When one of the first top wheel assembly 11, the second top wheel assembly 12, the first bottom wheel assembly 13 and the second bottom wheel assembly 14 is driven to rotate, the other can simultaneously rotate under the drive of the transmission chain 20, so that the power circulation transmission of the transmission mechanism 100 is realized.

Specifically, as shown in fig. 4, the operation of the transmission mechanism 100 of the present embodiment will be exemplarily described using the third top wheel 121 as a driving member, and the first top wheel 111, the second top wheel 112, the fourth top wheel 122, the first bottom wheel assembly 13, and the second bottom wheel assembly 14 as driven members: when the third top wheel 121 is driven to rotate anticlockwise, the third top wheel 121 drives the first top wheel 111 to rotate anticlockwise through the first side 201 of the transmission chain 20, the first top wheel 111 drives the first bottom wheel assembly 13 to rotate anticlockwise through the first side 201 of the transmission chain 20, the first bottom wheel assembly 13 drives the second top wheel 112 to rotate clockwise through the second side 202 of the transmission chain 20, the second top wheel 112 drives the fourth top wheel 122 to rotate clockwise through the second side 202 of the transmission chain 20, and the fourth top wheel 122 drives the second bottom wheel assembly 14 to rotate anticlockwise through the second side 202 of the transmission chain 20, so that power circulation transmission of the transmission mechanism 100 is realized.

In some embodiments, the third top wheel 121 is fixed relative to the second rotating shaft 123, and the third top wheel 121 and the second rotating shaft 123 can rotate in the same direction about the axis of the second rotating shaft 123; the fourth top wheel 122 is rotatably connected to the second rotating shaft 123, and the fourth top wheel 122 can rotate around the axis of the second rotating shaft 123 relative to the second rotating shaft 123.

In a specific implementation process, the fourth top wheel 122 may be rotatably connected to the second rotating shaft 123 through a bearing, specifically, the bearing is sleeved on the second rotating shaft 123, and the fourth top wheel 122 is sleeved on the bearing, that is, the bearing is located between the circumferential inner side of the fourth top wheel 122 and the circumferential outer side of the second rotating shaft 123, so that the fourth top wheel 122 may rotate around the axis of the second rotating shaft 123 relative to the second rotating shaft 123 through the bearing.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a transmission mechanism 100 according to another embodiment of the utility model. Since the third top wheel 121 and the fourth top wheel 122 are rotatable relative to each other and the drive wheel set 10 is drivingly connected by the same chain, in other embodiments, the third top wheel 121 and the fourth top wheel 122 may be arranged in a split manner, i.e. the third top wheel 121 and the fourth top wheel 122 are mounted on the door frame upright of the lift door by different rotational shafts.

Specifically, the number of the second rotating shafts 123 is two, the two second rotating shafts 123 are staggered, the third top wheel 121 is sleeved on one of the two second rotating shafts 123, and the fourth top wheel 122 is sleeved on the other of the two second rotating shafts 123.

Wherein the axial directions of the two second rotating shafts 123 are parallel.

It should be noted that, whether the driving chain 20 adopts a split structure (including two first chains 21 and second chains 22 which are both closed loops) or an integral structure (a single chain which is closed loops), since the first top wheel 111 and the second top wheel 112 need to drive the first side portion 201 and the second side portion 202 to operate in opposite directions respectively, the first top wheel 111 and the second top wheel 112 need to be able to rotate relative to each other, and therefore, the first top wheel 111 and the second top wheel 112 which can rotate relative to each other can be coaxially arranged or separately arranged as required. When the transmission chain 20 adopts an integral structure, the third top wheel 121 and the fourth top wheel 122 need to drive the first side 201 and the second side 202 to run in opposite directions respectively, so the third top wheel 121 and the fourth top wheel 122 need to be capable of rotating relatively, and therefore the third top wheel 121 and the fourth top wheel 122 capable of rotating relatively to each other can be coaxially arranged or split-axis arranged as required; when the transmission chain 20 is of a split structure, the third top wheel 121 and the fourth top wheel 122 need to be fixed relative to each other because the first chain 21 and the second chain 22 need to be linked by the second top wheel assembly 12, and therefore, the third top wheel 121 and the fourth top wheel 122 need to be coaxially fixed.

Referring back to fig. 2 and 3, after long-term operation of the transmission 100, the transmission chain 20 is prone to slackening and causing the chain to disengage from the sprocket, and thus, to avoid this, in some embodiments, the transmission 100 further includes a first tensioner 30 for adjusting the position of the first bottom wheel assembly 13 and/or a second tensioner 40 for adjusting the position of the second bottom wheel assembly 14, wherein the first tensioner 30 is coupled to the first bottom wheel assembly 13 and the second tensioner 40 is coupled to the second bottom wheel assembly 14.

The user can adjust the position of the first bottom wheel assembly 13 and the second bottom wheel assembly 14 through the first tensioning device 30 and the second tensioning device 40 respectively so as to adjust the tightness of the transmission chain 20 wound on the first bottom wheel assembly 13 and the second bottom wheel assembly 14, thereby avoiding the occurrence of the condition that the transmission chain 20 is loosened to cause the chain to be separated from the chain wheel.

It will be appreciated that when the driving wheel set 10 is in driving connection with the same chain, only one of the first tensioning device 30 and the second tensioning device 40 is required to be provided, so that the overall tightness of the driving chain 20 can be adjusted, and of course, the first tensioning device 30 may be provided at the first bottom wheel assembly 13, and the second tensioning device 40 may be provided at the second bottom wheel assembly 14. When the driving wheel set 10 is in driving connection with the first chain 21 and the second chain 22, the first tensioning device 30 and the second tensioning device 40 need to be arranged at the same time to adjust the tightness of the first chain 21 and the second chain 22, respectively, wherein the first tensioning device 30 can tension the first chain 21 between the first top wheel assembly 11 and the second top wheel assembly 12 and between the first top wheel assembly 11 and the first bottom wheel assembly 13, and the second tensioning device 40 can tension the second chain 22 between the second top wheel assembly 12 and the second bottom wheel assembly 40.

Referring to fig. 6, fig. 6 is a partially exploded view of the transmission mechanism 100 shown in fig. 2. In some embodiments, the first bottom wheel assembly 13 includes a first bottom wheel 131 and a first connecting shaft 132, the first bottom wheel 131 is sleeved on the first connecting shaft 132, the first bottom wheel 131 is connected with the transmission chain 20, and the first bottom wheel 131 can rotate around the axis of the first connecting shaft 132 relative to the first connecting shaft 132; the first tensioning device 30 comprises a first base 31 and a first adjusting member 32, the first adjusting member 32 is connected with the first connecting shaft 132, the first adjusting member 32 is adjustably connected with the first base 31, and the first adjusting member 32 can adjust the height position of the first connecting shaft 132.

The second bottom wheel assembly 14 comprises a second bottom wheel 141 and a second connecting shaft 142, the second bottom wheel 141 is sleeved on the second connecting shaft 142, the second bottom wheel 141 is connected with the transmission chain 20, and the second bottom wheel 141 can rotate around the axis of the second connecting shaft 142 relative to the second connecting shaft 142; the second tensioning device 40 includes a second base 41 and a second adjusting member 42, the second adjusting member 42 is connected with a second connecting shaft 142, and the second adjusting member 42 is adjustably connected with the second base 41, and the second adjusting member 42 can adjust the height position of the second connecting shaft 142.

When the transmission chain 20 needs to be tensioned, a user can downwards adjust the positions of the first connecting shaft 132 and the first bottom wheel 131 connected with the first connecting shaft 132 through the first adjusting member 32, downwards adjust the positions of the second connecting shaft 142 and the second bottom wheel 141 connected with the second connecting shaft 142 through the second adjusting member 42, so that the first bottom wheel 131 drives the chain part between the first top wheel assembly 11 and the first bottom wheel assembly 13 to downwards tighten, and the second bottom wheel 141 drives the chain part between the second top wheel assembly 12 and the second bottom wheel assembly 14 to downwards tighten, thereby realizing the adjustment of the tightness of the transmission chain 20.

The first top wheel 111, the second top wheel 112, the third top wheel 121, the fourth top wheel 122, the first bottom wheel 131 and the second bottom wheel 141 are sprocket structures matched with the chain structures.

In some embodiments, the first connecting shaft 132 is provided with a first guiding structure 101, the first base 31 is provided with a second guiding structure 301, and the first guiding structure 101 cooperates with the second guiding structure 301 to guide the first connecting shaft 132 to adjust the height position along a preset direction.

The second connection shaft 142 is provided with a third guide structure 102, the second base 41 is provided with a fourth guide structure 401, and the third guide structure 102 is matched with the fourth guide structure 401 to guide the second connection shaft 142 to adjust the height position along a preset direction.

Alternatively, the preset direction may be a vertical direction.

In some embodiments, the first base 31 includes two first bases 311 disposed at intervals, each of the two first bases 311 is provided with a second guiding structure 301, and each of the second guiding structures 301 includes two first guiding bodies 3011 disposed at intervals; the two ends of the first connecting shaft 132 extend into between the two first guide bodies 3011 on the two first seat bodies 311 respectively, the outer side walls of the two ends of the first connecting shaft 132 are respectively provided with a first guide structure 101, each first guide structure 101 comprises two first notch slots 1011 which are arranged in a back-to-back manner, and the two first notch slots 1011 are respectively matched with the two corresponding first guide bodies 3011 in a guiding manner so as to guide the first connecting shaft 132 to adjust the height position along the preset direction.

The second base 41 comprises two second base bodies 411 which are arranged at intervals, the two second base bodies 411 are provided with fourth guide structures 401, and each fourth guide structure 401 comprises two second guide bodies 4011 which are arranged at intervals; the two ends of the second connecting shaft 142 extend into between the two second guide bodies 4011 on the two second base bodies 411 respectively, the outer side walls of the two ends of the second connecting shaft 142 are respectively provided with a third guide structure 102, each third guide structure 102 comprises two second notch grooves 1021 which are arranged in a back-to-back mode, and the two second notch grooves 1021 are respectively matched with the corresponding two second guide bodies 4011 in a guiding mode so as to guide the second connecting shaft 142 to adjust the height position along the preset direction.

Referring to fig. 7, fig. 7 is a perspective view showing the assembly of the first bottom wheel assembly 13 (the second bottom wheel assembly 14) and the first tensioning device 30 (the second tensioning device 40) shown in fig. 6, wherein the assembly structure of the second bottom wheel assembly 14 and the second tensioning device 40 is similar to or the same as the assembly structure of the first bottom wheel assembly 13 and the first tensioning device 30, and thus, the assembly structure of the first bottom wheel assembly 13 and the first tensioning device 30 and the assembly structure of the second bottom wheel assembly 14 and the second tensioning device 40 can refer to the structure shown in fig. 7 together. Specifically, each first guide body 3011 has two first limiting sidewalls 30111 opposite to each other, and a first guide sidewall 30112 connecting the two first limiting sidewalls 30111, wherein, on the first seat 311, the first guide sidewalls 30112 of the two first guide bodies 3011 are disposed toward each other and at intervals; each first notch 1011 has two first abutment side walls 10111 disposed at an axial interval along the first connecting shaft 132, and a second abutment side wall 10112 located between the two first abutment side walls 10111. The two first limiting side walls 30111 of each first guide body 3011 respectively abut against the two corresponding first abutting side walls 10111 so as to limit the first connecting shaft 132 to move relative to the first seat body 311 along the axial direction of the first connecting shaft 132; the first guiding sidewall 30112 of each first guiding body 3011 abuts against the corresponding second abutting sidewall 10112, so as to limit the first connecting shaft 132 from being offset towards the second abutting sidewall 10112 relative to the first base 311, and limit the first connecting shaft 132 from rotating about the axis of the first connecting shaft 132 relative to the first base 311. In this way, a guiding action of the first connecting shaft 132 is achieved such that the first connecting shaft 132 can only move up and down along the first guide 3011 when the height position is adjusted.

Each second guide body 4011 has two third limit side walls 40111 facing away from each other, and a third guide side wall 40112 connecting the two third limit side walls 40111, wherein the third guide side walls 40112 of the two second guide bodies 4011 are disposed at an interval toward each other on the second seat 411; each second cutout groove 1021 has two third abutment side walls 10211 disposed at intervals in the axial direction of the second connection shaft 142, and a fourth abutment side wall 10212 located between the two third abutment side walls 10211. The two third limiting side walls 40111 of each second guide body 4011 respectively abut against the corresponding two third abutting side walls 10211 so as to limit the second connecting shaft 142 to move along the axial direction of the second connecting shaft 142 relative to the second base 411; the third guide sidewall 40112 of each second guide body 4011 abuts against the corresponding fourth abutting sidewall 10212 to limit the second connecting shaft 142 from being offset toward the fourth abutting sidewall 10212 relative to the second base 411 and to limit the second connecting shaft 142 from rotating about the axis of the second connecting shaft 142 relative to the second base 411. In this way, a guiding action of the second connecting shaft 142 is achieved such that the second connecting shaft 142 can only move up and down along the second guide 4011 when the height position is adjusted. The first guide 3011 and the second guide 4011 each have a square column shape, the first notch 1011 has a square through groove that fits the first guide 3011, and the second notch 1021 has a square through groove that fits the second guide 4011.

Of course, the first guide 3011 and the second guide 4011 may have other shapes, for example, a cylindrical shape, and the first notch 1011 may have an arc-shaped through groove that fits the first guide 3011, and the second notch 1021 may have an arc-shaped through groove that fits the second guide 4011.

In some embodiments, as shown in fig. 6, the first connecting shaft 132 is provided with a first connecting hole 103, the second connecting shaft 142 is provided with a second connecting hole 104, the inner wall of the first connecting hole 103 is provided with a first boss, and the inner side of the second connecting hole 104 is provided with a second boss. The first seat body 311 is provided with a first threaded hole 302, the second seat body 411 is provided with a second threaded hole 402, the first threaded hole 302 is positioned between the two first guide bodies 3011 and corresponds to the first connecting hole 103, and the second threaded hole 402 is positioned between the two second guide bodies 4011 and corresponds to the second connecting hole 104.

The first and second adjustment members 32, 42 are each of a bolt construction. The screw part of the first adjusting member 32 sequentially penetrates through the first connecting hole 103 and the first threaded hole 302 and is in threaded connection with the first threaded hole 302, and the nut part of the first adjusting member 32 is positioned in the first connecting hole 103 and abuts against the first boss so as to abut against the first connecting shaft 132 from top to bottom, so that the first connecting shaft 132 is fixed relative to the first base 31 under the pulling action of the transmission chain 20; the screw portion of the second adjusting member 42 sequentially penetrates through the second connecting hole 104 and the second threaded hole 402 and is in threaded connection with the second threaded hole 402, and the nut portion of the second adjusting member 42 is located in the second connecting hole 104 and abuts against the second boss so as to abut against the second connecting shaft 142 from top to bottom, so that the second connecting shaft 142 is fixed relative to the second base 41 under the pulling action of the transmission chain 20.

With continued reference to fig. 2 and 3, in some embodiments, the transmission 100 further includes a drive motor 50 for driving the drive chain 20, the drive motor 50 being coupled to the drive pulley assembly 10.

In some embodiments, the output end of the driving motor 50 is connected to the second rotating shaft 123, and the driving motor 50 can drive the second rotating shaft 123 to drive the third top wheel 121 and the fourth top wheel 122 to rotate synchronously, so as to drive the first chain 21 and the second chain 22 to run. Specifically, when the third top wheel 121 and the fourth top wheel 122 are driven to rotate counterclockwise, the third top wheel 121 drives the first top wheel 111 to rotate counterclockwise through the first side 201 of the first chain 21, the first top wheel 111 drives the first bottom wheel assembly 13 to rotate counterclockwise through the first side 201 of the first chain 21, the first bottom wheel assembly 13 drives the second top wheel 112 to rotate clockwise through the second side 202 of the first chain 21, and the fourth top wheel 122 drives the second bottom wheel assembly 14 to rotate counterclockwise through the second chain 22, thereby realizing power transmission of the transmission mechanism 100.

In other embodiments, the output end of the driving motor 50 may also be connected to the first rotating shaft 113, the first connecting shaft 132 or the second connecting shaft 142 to drive the driving chain 20 to operate.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a lift gate according to another embodiment of the present utility model. Embodiments of the present utility model also provide a lift gate 1000, where the lift gate 1000 includes a door frame pillar 200, a door panel assembly 300, and a transmission mechanism 100 as described in any of the embodiments above. The transmission mechanism 100 is mounted on the door frame upright 200, the transmission chain 20 of the transmission mechanism 100 is connected to the left and right sides of the door panel assembly 300, and the transmission mechanism 100 is used for driving the door panel assembly 300 to ascend or descend.

Specifically, the door frame columns 200 have two, two door frame columns 200 are arranged side by side and at a distance, the first top wheel assembly 11 and the first bottom wheel assembly 13 are arranged on one of the two door frame columns 200, and the second top wheel assembly 12 and the second bottom wheel assembly 14 are arranged on the other of the two door frame columns 200. The door panel assembly 300 is located between two door frame posts 200, the portion of the drive chain 20 between the first top wheel assembly 11 and the first bottom wheel assembly 13 is connected to one side of the door panel assembly 300 by a traction bracket, and the portion of the drive chain 20 between the second top wheel assembly 12 and the second bottom wheel assembly 14 is connected to the other side of the door panel assembly 300 by another traction bracket.

It will be appreciated that the partial chains of the driving chain 20 respectively located at the left and right sides of the door panel assembly 300 need to run in the same direction, so that the door panel assembly 300 can be driven to be stably lifted. Taking the orientation shown in fig. 8 as an example, the chain portion of the transmission chain 20 between the first top wheel assembly 11 and the first bottom wheel assembly 13 is located on the right side of the door plate assembly 300, and two straight edges are spaced left and right from the chain portion between the first top wheel assembly 11 and the first bottom wheel assembly 13, and the right side of the door plate assembly 300 is connected with the right straight edges through a traction bracket; the chain portion of the drive chain 20 between the second top wheel assembly 12 and the second bottom wheel assembly 14 is located on the left side of the door panel assembly 300, the chain portion between the second top wheel assembly 12 and the second bottom wheel assembly 14 is laterally spaced apart by two straight edges, and the left side of the door panel assembly 300 is connected to the right straight edge by another traction bracket. Thus, when the driving chain 20 is running, the driving chain 20 can drive the door panel assembly 300 to lift in the same direction on the left and right sides of the door panel assembly 300.

Specifically, referring back to fig. 1, the transmission mechanism 100 shown in fig. 8 is arranged in the same manner as the transmission mechanism 100 shown in fig. 1, and when the driving motor 50 drives the third top wheel 121 and the fourth top wheel 122 to rotate in a counterclockwise synchronous manner, the right straight edge of the chain portion between the first top wheel assembly 11 and the first bottom wheel assembly 13 moves upward, and the right straight edge of the chain portion between the second top wheel assembly 12 and the second bottom wheel assembly 14 also moves upward, so that the door plate assembly 300 is driven to rise on both the left and right sides of the door plate assembly 300; similarly, when the driving motor 50 drives the third top wheel 121 and the fourth top wheel 122 to rotate in synchronization clockwise, the right straight edge of the chain portion between the first top wheel assembly 11 and the first bottom wheel assembly 13 runs downward, and the right straight edge of the chain portion between the second top wheel assembly 12 and the second bottom wheel assembly 14 also runs downward, thereby simultaneously driving the door panel assembly 300 to descend at both the left and right sides of the door panel assembly 300.

It should be specifically noted that, the lift gate 1000 provided in the embodiment of the present utility model only shows a portion related to the technical problem to be solved in the embodiment of the present utility model, and it is understood that the lift gate 1000 provided in the embodiment of the present utility model further includes other structures for implementing the function of the lift gate 1000, including but not limited to an elastic balancing device and the like.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the utility model, the steps may be implemented in any order, and there are many other variations of the different aspects of the utility model as described above, which are not provided in detail for the sake of brevity; while the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. A transmission mechanism, comprising:

The transmission wheel set comprises a first top wheel assembly, a second top wheel assembly, a first bottom wheel assembly and a second bottom wheel assembly, wherein the first top wheel assembly comprises a first top wheel and a second top wheel which can rotate relative to each other, the second top wheel assembly and the first top wheel assembly are arranged at intervals, the first bottom wheel assembly is positioned below the first top wheel assembly, and the second bottom wheel assembly is positioned below the second top wheel assembly;

the transmission chain is wound on the first top wheel assembly, the second top wheel assembly, the first bottom wheel assembly and the second bottom wheel assembly, so that power is transmitted between the first top wheel assembly, the second top wheel assembly, the first bottom wheel assembly and the second bottom wheel assembly, the transmission chain is provided with a first side part and a second side part which are opposite, the first side part is wound on the first top wheel, and the second side part is wound on the second top wheel.

2. The transmission of claim 1, wherein the second top wheel assembly includes a third top wheel and a fourth top wheel fixed relative to each other;

The transmission chain comprises a first chain and a second chain, the first chain is provided with a first side part and a second side part, two ends of the first chain are respectively wound on the third top wheel and the first bottom wheel assembly, and two ends of the second chain are respectively wound on the fourth top wheel and the second bottom wheel assembly.

3. The transmission of claim 1, wherein the second top wheel assembly includes a third top wheel and a fourth top wheel rotatable relative to each other;

The two ends of the transmission chain are respectively wound on the first bottom wheel assembly and the second bottom wheel assembly, the first side part is wound on the first top wheel and the third top wheel, and the second side part is wound on the second top wheel and the fourth top wheel.

4. A transmission mechanism according to claim 2 or 3, wherein the first top wheel assembly further comprises a first shaft, the first top wheel and the second top wheel being respectively sleeved on the first shaft;

The second top wheel assembly further comprises a second rotating shaft, and the third top wheel and the fourth top wheel are respectively sleeved on the second rotating shaft.

5. The transmission of claim 1, further comprising a first tensioner for adjusting a position of the first bottom wheel assembly and/or a second tensioner for adjusting a position of the second bottom wheel assembly, wherein the first tensioner is coupled to the first bottom wheel assembly and the second tensioner is coupled to the second bottom wheel assembly.

6. The transmission mechanism according to claim 5, wherein the first bottom wheel assembly comprises a first bottom wheel and a first connecting shaft, the first bottom wheel is sleeved on the first connecting shaft, and the first bottom wheel is connected with the transmission chain;

The first tensioning device comprises a first base and a first adjusting piece, the first adjusting piece is connected with the first connecting shaft, the first adjusting piece is connected with the first base in an adjustable mode, and the first adjusting piece can adjust the height position of the first connecting shaft;

The second bottom wheel assembly comprises a second bottom wheel and a second connecting shaft, the second bottom wheel is sleeved on the second connecting shaft, and the second bottom wheel is connected with the transmission chain;

the second tensioning device comprises a second base and a second adjusting piece, the second adjusting piece is connected with the second connecting shaft, the second adjusting piece is connected with the second base in an adjustable mode, and the second adjusting piece can adjust the height position of the second connecting shaft.

7. The transmission mechanism according to claim 6, wherein the first connecting shaft is provided with a first guide structure, the first base is provided with a second guide structure, and the first guide structure is in guide fit with the second guide structure so as to guide the first connecting shaft to adjust the height position along a preset direction;

The second connecting shaft is provided with a third guide structure, the second base is provided with a fourth guide structure, and the third guide structure is in guide fit with the fourth guide structure so as to guide the second connecting shaft to adjust the height position along the preset direction.

8. The transmission mechanism according to claim 7, wherein the first base includes two first base bodies arranged at intervals, the two first base bodies are each provided with the first guide structure, and each of the first guide structures includes two first guide bodies arranged at intervals;

The two ends of the first connecting shaft extend into between two first guide bodies on the two first base bodies respectively, the outer side walls of the two ends of the first connecting shaft are respectively provided with the second guide structures, each second guide structure comprises two first notch grooves which are oppositely arranged, and the two first notch grooves are respectively matched with the two corresponding first guide bodies in a guiding manner so as to guide the first connecting shaft to adjust the height position along the preset direction;

The second base comprises two second base bodies which are arranged at intervals, the two second base bodies are provided with third guide structures, and each third guide structure comprises two second guide bodies which are arranged at intervals;

The two ends of the second connecting shaft extend into the space between the two second guide bodies on the two second base bodies respectively, the outer side walls of the two ends of the second connecting shaft are respectively provided with fourth guide structures, each fourth guide structure comprises two second notch grooves which are arranged in a back-to-back mode, and the two second notch grooves are matched with the corresponding two second guide bodies in a guiding mode respectively so as to guide the second connecting shaft to adjust the height position along the preset direction.

9. The transmission mechanism of claim 1, further comprising a drive motor for driving the drive chain to run, the drive motor being coupled to the drive wheel set.

10. A lifting door, comprising a door frame upright, a door plate assembly and the transmission mechanism of any one of claims 1 to 9, wherein the transmission mechanism is installed on the door frame upright, and a transmission chain of the transmission mechanism is connected with the left side and the right side of the door plate assembly.