CN210461565U - Tensioning device - Google Patents
Tensioning device Download PDFInfo
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- CN210461565U CN210461565U CN201921294453.4U CN201921294453U CN210461565U CN 210461565 U CN210461565 U CN 210461565U CN 201921294453 U CN201921294453 U CN 201921294453U CN 210461565 U CN210461565 U CN 210461565U
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Abstract
The application discloses overspeed device tensioner includes: the installation piece divides the installation space into a first installation space and a second installation space, and the synchronous belt is arranged in the first installation space; the first tensioning wheel and the second tensioning wheel are arranged in the first installation space, and the two tensioning wheels are respectively positioned at two sides of the synchronous belt and extrude the synchronous belt towards the inner side of the synchronous belt; a first mounting mechanism and a second mounting mechanism which penetrate through the mounting piece and extend into the second mounting space from the first mounting space, wherein the first tensioning wheel and the second tensioning wheel are respectively arranged on the first mounting mechanism and the second mounting mechanism; and the elastic piece is positioned in the second mounting space and is connected with the first mounting mechanism and the second mounting mechanism, and the elastic piece enables the two tensioning wheels to apply the same tensioning force to the synchronous belt. The tensioning device improves the dynamic stability of the synchronous belt, does not reduce the wrap angle of the synchronous belt, avoids the increase of the size of the shell, and can be matched with a belt transmission mechanism with narrow installation space.
Description
Technical Field
The utility model relates to a belt drive technical field, in particular to overspeed device tensioner.
Background
The tensioning mechanism is an important component of a belt transmission mechanism (the belt transmission mechanism mainly comprises a driving wheel, a driven wheel and a synchronous belt), the existing tensioning mechanism for tensioning the synchronous belt mainly has two setting modes, one mode is to tension the synchronous belt on one side, namely, the synchronous belt is extruded by a roller wheel from one side of the synchronous belt to tension the synchronous belt; the other type is to carry out inside tensioning to the hold-in range, namely the gyro wheel setting is in the inboard space that the hold-in range encloses and extrudeed the hold-in range outside in order to realize the tensioning.
However, when a single-side tensioning mode is adopted, the tension of the tensioning-side synchronous belt is inconsistent with the stress of the non-tensioning-side synchronous belt, so that the dynamic characteristic of the synchronous belt in the transmission process is unstable; when an internal measurement tensioning mode is adopted, the rollers extrude the synchronous belt outwards, so that the wrap angle of the synchronous belt on the driving wheel and the driven wheel is reduced, and the transmission of power is not facilitated.
In addition, when an inner tensioning mode is adopted, the shell surrounding the whole belt transmission mechanism needs to provide a space for tensioning the synchronous belt to the outer side, so that the size of the shell is increased, the manufacturing cost of the equipment is increased, and the installation of the equipment is not facilitated.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a tensioning device, it can improve the dynamic stability of hold-in range, can not make the hold-in range reduce at the action wheel and the cornerite from the driving wheel moreover, has also avoided the increase of casing volume simultaneously, can also with the comparatively narrow and small belt drive mechanism cooperation work of installation space.
In order to achieve the above object, the utility model provides a following technical scheme:
a tensioner for tensioning a timing belt for transmitting power between a drive pulley and a driven pulley, comprising:
the mounting piece divides the mounting space into a first mounting space and a second mounting space, and the driving wheel, the driven wheel and the synchronous belt are all arranged in the first mounting space;
the first tensioning wheel and the second tensioning wheel are arranged in the first installation space, are respectively positioned at two sides of the synchronous belt and extrude the synchronous belt towards the inner side of the synchronous belt so as to tension the synchronous belt;
a first mounting mechanism passing through the mounting member to project from the first mounting space into the second mounting space, the first tension wheel being provided on the first mounting mechanism;
a second mounting mechanism passing through the mounting member to project from the first mounting space into the second mounting space, the second tensioning wheel being disposed on the second mounting mechanism;
and the first mounting mechanism and the second mounting mechanism are arranged in the second mounting space, and two ends of the elastic piece are respectively connected with the first mounting mechanism and the second mounting mechanism, and under the action of elastic force applied by the elastic piece, the first tensioning wheel and the second tensioning wheel can be enabled to apply the same tension to the synchronous belt.
Preferably, in the above-described tensioner device, a plurality of connecting structures are provided on the elastic member, each of the connecting structures is located at a different position of the elastic member, and the first mounting mechanism and the second mounting mechanism are connected to the different connecting structures, so that the tension applied to the timing belt by the first tension pulley and the second tension pulley can be changed.
Preferably, in the above-described tensioner, the first mounting mechanism and the second mounting mechanism have the same structure, and each of them includes:
the rotating shaft is rotatably connected with the mounting piece, penetrates through the mounting piece, and two ends of the rotating shaft respectively extend into the first mounting space and the second mounting space;
the tensioning arm is positioned in the first installation space, one end of the tensioning arm is fixedly connected with the end part of the rotating shaft positioned in the first installation space, and the other end of the tensioning arm is rotatably connected with the first tensioning wheel or the second tensioning wheel;
and the connecting arm is positioned in the second mounting space, one end of the connecting arm is fixedly connected with the end part of the rotating shaft positioned in the second mounting space, and the other end of the connecting arm is connected with the elastic part.
Preferably, in the above-described tensioner device, the tensioner arm and the connecting arm are located on the same side in the radial direction of the rotating shaft, and the elastic member is a coil spring that applies tensile force to the connecting arm of the first mounting mechanism and the second mounting mechanism.
Preferably, in the above tensioning device, the tensioning arm and the connecting arm are located at different sides of the rotating shaft in the radial direction, and the elastic member is a coil spring or a metal elastic sheet that applies thrust to the connecting arm of the first mounting mechanism and the second mounting mechanism.
Preferably, in the above-described tensioner, the first mounting mechanism and the second mounting mechanism are disposed symmetrically about a center of the mounting member.
Preferably, in the above-described tensioner, the connecting arm is a bending arm, a bending portion of the bending arm is an end portion connected to the elastic member, and the end portion is bent in a direction away from the other connecting arm.
Preferably, in the above-described tensioner, the connecting arm is a bending arm, a bending portion of the bending arm is an end portion connected to the elastic member, and the end portion is bent in a direction approaching the other connecting arm.
Preferably, in the above tensioner, the mounting member is a rectangular plate-like member.
The utility model provides a tensioning device, when tensioning the hold-in range, adopt two take-up pulleys to respectively tension the hold-in range simultaneously in the both sides of hold-in range, and the tensile force of two take-up pulleys is provided by same elastic component, has guaranteed that the tensile force that the hold-in range both sides bore is the same, has avoided the unstable condition emergence of the dynamic characteristic of hold-in range; when the first tensioning wheel and the second tensioning wheel tension the synchronous belt, tensioning force is applied to the inner side (the inner side refers to the side where the inner space surrounded by the synchronous belt is located) of the outer side of the synchronous belt, so that the synchronous belt is bent towards the inner side, the wrap angle of the synchronous belt on the driving wheel and the driven wheel is not reduced, even the wrap angle is increased, the transmission of power is facilitated, a shell does not need to reserve an outward bending space for the synchronous belt, and the manufacturing cost and the installation difficulty of equipment are reduced; the first mounting mechanism and the second mounting mechanism for mounting the tensioning wheel and the elastic piece for providing the tensioning force are not all arranged in the first mounting space where the synchronous belt, the driving wheel and the driven wheel are located, but partial structures and the elastic piece of the first tensioning mechanism and the second tensioning mechanism are located in the second mounting space, so that the layout of the tensioning device is more reasonable, and the tensioning device can be matched with the belt transmission mechanism with the small mounting space.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a top view of a tensioner cooperating with a belt drive mechanism in accordance with an embodiment of the present invention;
FIG. 2 is a bottom view of FIG. 1;
fig. 3 is a cross-sectional view of fig. 1 (the timing belt is not shown in this figure).
In fig. 1-3:
1-mounting piece, 2-first tensioning wheel, 3-second tensioning wheel, 4-elastic piece, 5-rotating shaft, 6-tensioning arm, 7-connecting arm, 8-driving wheel, 9-driven wheel and 10-synchronous belt.
Detailed Description
The utility model provides a tensioning device, it can improve the dynamic stability of hold-in range, can not make the hold-in range reduce at the action wheel and the cornerite from driving wheel moreover, has also avoided the increase of casing volume simultaneously, can also with the comparatively narrow and small belt drive mechanism cooperation work of installation space.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1-3, the embodiment of the utility model provides a tensioning device, it is used for cooperating the work with belt drive mechanism (belt drive mechanism includes action wheel 8, follows driving wheel 9 and cover and establish the hold-in range 10 with transmission power on action wheel 8 and follow driving wheel 9), specifically is to carry out the tensioning to hold-in range 10, and this tensioning device mainly includes: the mounting piece 1 divides the mounting space into a first mounting space and a second mounting space, the driving wheel 8 and the driven wheel 9 are arranged on the mounting piece 1, and the driving wheel 8, the driven wheel 9 and the synchronous belt 10 are all positioned in the first mounting space; the first tensioning wheel 2 and the second tensioning wheel 3 are arranged in the first installation space, the first tensioning wheel 2 and the second tensioning wheel 3 are respectively positioned at two sides of the synchronous belt 10 (in the view of fig. 1, specifically, at the upper side and the lower side of the synchronous belt 10), and both press the synchronous belt 10 towards the inner side of the synchronous belt 10 to tension the synchronous belt 10 (as shown by arrows in fig. 1), and the arrangement mode realizes bidirectional outer tension of the synchronous belt 10; a first mounting mechanism penetrating the mounting member 1 to project from the first mounting space into the second mounting space, the first tension roller 2 being provided on the first mounting mechanism, i.e., a part of the mechanism for mounting the first tension roller 2 is located in the first mounting space, and the other part is located in the second mounting space; a second mounting mechanism which passes through the mounting member 1 to project from the first mounting space into a second mounting space, on which the second tensioning wheel 3 is provided, and likewise, a part of the mechanism for mounting the second tensioning wheel 3 is located in the first mounting space and the other part is located in the second mounting space; and the elastic members 4 are positioned in the second installation space, two ends of each elastic member are respectively connected with the first installation mechanism and the second installation mechanism, and the first installation mechanism and the second installation mechanism can enable the tension forces applied by the first tension wheel 2 and the second tension wheel 3 to the synchronous belt 10 to be the same in magnitude and opposite in direction under the action of the elastic force applied by the elastic members 4, namely the elastic members 4 for providing tension forces for the first tension wheel 2 and the second tension wheel 3 are arranged in the second installation space. With such arrangement, not only the same component provides tension force for the first tension pulley 2 and the second tension pulley 3, so that the two tension pulleys are equally stressed, and the two-way tensioning of the synchronous belt 10 realizes dynamic balance, but also the wrap angle of the synchronous belt 10 on the driving wheel 8 and the driven wheel 9 is prevented from being reduced by the way of outer side tensioning, and the volume of the shell is not increased, and simultaneously, reasonable distribution of the installation structure of the tension pulleys in two spaces is realized, compared with the arrangement way that the elastic element 4 and the installation mechanism for installing the tension pulleys are arranged in the space where the synchronous belt 10, the driving wheel 8 and the driven wheel 9 are arranged, the arrangement way in the embodiment has more compact structure, more flexible use, more convenient arrangement and installation of components, further improves the dynamic stability of the synchronous belt 10, and more remarkable tensioning effect is improved, meanwhile, the belt transmission mechanism can be better matched with a belt transmission mechanism with narrower installation space for installation and work.
In order to further optimize the technical solution, in the tensioning device provided in this embodiment, it is preferable that the elastic member 4 is provided with a plurality of connecting structures (not shown in the figure), each of the connecting structures is located at a different position of the elastic member 4, and the tensioning force applied to the timing belt 10 by the first tensioning wheel 2 and the second tensioning wheel 3 can be changed by connecting the first mounting mechanism and the second mounting mechanism to different connecting structures. Therefore, a plurality of connecting structures are arranged on the elastic member 4, because the synchronous belt 10 can be loosened after being tensioned for a period of time, the balance of the interaction forces of the synchronous belt 10 and two tensioning wheels is damaged, and therefore the tensioning force needs to be adjusted, and because the tensioning force provided by the elastic member 4 with the original length is not enough to meet the tensioning requirement, the tensioning force provided by the elastic member 4 can be changed by connecting the first mounting mechanism and the second mounting mechanism with other connecting structures, specifically: when the elastic force (i.e. the tension force) provided by the elastic member 4 is generated by being compressed, the compressed length of the elastic member 4 can be increased, that is, the first mounting mechanism and the second mounting mechanism are connected with the connecting structure closer to the end of the elastic member 4, so as to increase the elastic force and further increase the tension force; when the elastic force provided by the elastic member 4 is generated by being stretched, the stretched length of the elastic member 4 can be reduced, that is, the first mounting mechanism and the second mounting mechanism are connected with the connecting structure closer to the middle part of the elastic member 4, so as to increase the elastic force, and further increase the tension force. Specifically, the elastic member 4 may have various structures, such as a coil spring, a metal elastic sheet, and the like, preferably, in this embodiment, the connection structure may be a hook connected to different coil sections of the coil spring or a through hole formed in different portions of the metal elastic sheet, and the first mounting mechanism and the second mounting mechanism are connected to the elastic member 4 by connecting the hook or the through hole.
As shown in fig. 1-3, the first mounting mechanism and the second mounting mechanism are preferably identical in structure and each include: the rotating shaft 5 is rotatably connected with the mounting part 1, the rotating shaft 5 penetrates through the mounting part 1, and two ends of the rotating shaft respectively extend into the first mounting space and the second mounting space; the tensioning arm 6 is positioned in the first installation space, one end of the tensioning arm 6 is fixedly connected with the end part of the rotating shaft 5 positioned in the first installation space, and the other end of the tensioning arm 6 is rotatably connected with the first tensioning wheel 2 or the second tensioning wheel 3; and the connecting arm 7 is positioned in the second mounting space, one end of the connecting arm 7 is fixedly connected with the end part of the rotating shaft 5 positioned in the second mounting space, and the other end of the connecting arm 7 is connected with the elastic piece 4. That is to say, connect elastic component 4 and first take-up pulley 2, the structure of second take-up pulley 3 is by tensioning arm 6, pivot 5 and linking arm 7 are connected and are formed, elastic component 4 can drive linking arm 7 when applying elasticity to linking arm 7 and rotate around the axle center of pivot 5, pivot 5 passes through the bearing and installs on installed part 1, when linking arm 7 rotates, 5 synchronous rotations of pivot, and then drive the tensioning arm 6 rotation (tensioning arm 6 also rotates around the axle center of pivot 5) with 5 fixed connection of pivot, through the drive of tensioning arm 6, first tensioning pulley 2 or second take-up pulley 3 remove in order to compress tightly hold-in range 10 to the inboard direction of hold-in range 10, and then realize the tensioning to hold-in range 10.
As shown in fig. 1-3, in a preferred structure, the tensioning arm 6 and the connecting arm 7 are located on the same side in the radial direction of the rotating shaft 5, i.e. the tensioning arm 6, the rotating shaft 5 and the connecting arm 7 are connected into a U-shaped structure, the mounting member 1 is located in the opening of the U-shaped structure, and the tensioning arm 6 and the connecting arm 7 are aligned, so that the tensioning arm 6 and the connecting arm 7 rotate synchronously around the rotating shaft 5, i.e. the connecting arm 7 rotates downwards, and the tensioning arm 6 rotates upwards, i.e. the connecting arm 7 rotates upwards, i.e. the direction of rotation of the connecting arm 7 is the direction of movement of the first tensioning wheel 2 or the second tensioning wheel 3, on the basis of which, in order to ensure the normal tensioning of the timing belt 10, the elastic member 4 is a coil spring that applies a pulling force (i.e. is stretched) to the connecting arm 7 of the first mounting mechanism and the connecting arm 7 of the second mounting mechanism, so that, as indicated by arrows in fig. 2, so that the first tension pulley 2 and the second tension pulley 3 positioned on both sides of the timing belt 10 are close to each other, thereby achieving bidirectional outer tension of the timing belt 10.
In another preferred structure, the tensioning arm 6 and the connecting arm 7 may be located at different sides of the rotating shaft 5 in the radial direction (this structural diagram is not shown), that is, it can be understood that the tensioning arm 6, the rotating shaft 5 and the connecting arm 7 are connected to form a lever with the rotating shaft 5 as a fulcrum, because the rotation directions of the tensioning arm 6 and the connecting arm 7 located at two sides of the fulcrum are opposite, that is, the tensioning arm 6 rotates downwards when the connecting arm 7 rotates upwards, and the tensioning arm 6 rotates upwards when the connecting arm 7 rotates downwards, in order to ensure the normal tensioning of the synchronous belt 10, the elastic member 4 is a coil spring or a metal elastic sheet (the metal elastic sheet which is compressed and bent can apply a pushing force to the two connecting arms 7 at two ends thereof) for applying a pushing force to the connecting arm 7 of the first mounting mechanism and the connecting arm 7 of the second mounting mechanism located at two ends thereof respectively, and the connecting arm 7 of the first mounting mechanism and the connecting arm 7 of the second mounting mechanism located And further the first tension pulley 2 and the second tension pulley 3 provided on the two tension arms 6 are brought close to each other to finally achieve the bidirectional outside tension of the timing belt 10.
As shown in fig. 1 and 2, the present embodiment also preferably has the first mounting mechanism and the second mounting mechanism arranged symmetrically about the center of the mounting member 1. The tension device thus configured can further improve the dynamic stability of the synchronous belt 10, so that the force applied to the synchronous belt 10 is more balanced, and the tension effect on the synchronous belt 10 is more prominent, so that the tension device is used as a preferred arrangement mode of the present embodiment.
Further, preferably, the connecting arm 7 is a bending arm, the bending portion of the bending arm is the end portion connected with the elastic member 4, and when the tensioning arm 6, the rotating shaft 5 and the connecting arm 7 are connected to form a U-shaped structure, as shown in fig. 2, the end portion is bent in a direction away from the other connecting arm 7, so that the distance between the connecting arm 7 of the first mounting mechanism and the connecting arm 7 of the second mounting mechanism is larger, the distance for stretching the elastic member 4 is larger, and the generated tension force is also larger, so as to further improve the working effect of the tensioning device. Similarly, when the tensioning arm 6, the rotating shaft 5 and the connecting arm 7 are connected to form a lever with the rotating shaft 5 as a fulcrum, the end of the bending arm is bent (not shown in the figure) to be close to the other connecting arm 7, so that the distance between the connecting arm 7 of the first mounting mechanism and the connecting arm 7 of the second mounting mechanism is reduced, the degree of compression of the elastic element 4 is larger, and the generated tensioning force is larger.
Preferably, as shown in fig. 1 to 3, the mounting member 1 is a rectangular plate-like member. The installation part 1 with the structure is beneficial to installation and distribution of all parts of the tensioning device, so that the tensioning effect of the tensioning device on the synchronous belt 10 is further improved.
The structure of each part is described in a progressive mode in the specification, the structure of each part is mainly described to be different from the existing structure, and the whole and partial structure of the tensioning device can be obtained by combining the structures of the parts.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A tensioning device for tensioning a synchronous belt for transmitting power between a driving wheel and a driven wheel, comprising:
the mounting piece divides the mounting space into a first mounting space and a second mounting space, and the driving wheel, the driven wheel and the synchronous belt are all arranged in the first mounting space;
the first tensioning wheel and the second tensioning wheel are arranged in the first installation space, are respectively positioned at two sides of the synchronous belt and extrude the synchronous belt towards the inner side of the synchronous belt so as to tension the synchronous belt;
a first mounting mechanism passing through the mounting member to project from the first mounting space into the second mounting space, the first tension wheel being provided on the first mounting mechanism;
a second mounting mechanism passing through the mounting member to project from the first mounting space into the second mounting space, the second tensioning wheel being disposed on the second mounting mechanism;
and the first mounting mechanism and the second mounting mechanism are arranged in the second mounting space, and two ends of the elastic piece are respectively connected with the first mounting mechanism and the second mounting mechanism, and under the action of elastic force applied by the elastic piece, the first tensioning wheel and the second tensioning wheel can be enabled to apply the same tension to the synchronous belt.
2. The tensioning device of claim 1, wherein a plurality of connecting structures are provided on said elastic member, each of said connecting structures being located at a different location on said elastic member, and wherein the tension applied to said timing belt by said first tensioning wheel and said second tensioning wheel can be varied by connecting said first mounting mechanism and said second mounting mechanism to different ones of said connecting structures.
3. The tensioner as in claim 1, wherein the first mounting mechanism and the second mounting mechanism are structurally identical and each comprise:
the rotating shaft is rotatably connected with the mounting piece, penetrates through the mounting piece, and two ends of the rotating shaft respectively extend into the first mounting space and the second mounting space;
the tensioning arm is positioned in the first installation space, one end of the tensioning arm is fixedly connected with the end part of the rotating shaft positioned in the first installation space, and the other end of the tensioning arm is rotatably connected with the first tensioning wheel or the second tensioning wheel;
and the connecting arm is positioned in the second mounting space, one end of the connecting arm is fixedly connected with the end part of the rotating shaft positioned in the second mounting space, and the other end of the connecting arm is connected with the elastic part.
4. A tensioning device according to claim 3, wherein the tensioning arm and the connecting arm are located on the same side of the shaft in the radial direction, and the resilient member is a coil spring that applies a pulling force to the connecting arm of the first mounting means and the second mounting means.
5. A tensioning device as claimed in claim 3, wherein the tensioning arm and the connecting arm are located at different radial sides of the shaft, and the resilient member is a coil spring or a metal leaf spring that applies a pushing force to the connecting arm of the first mounting mechanism and the second mounting mechanism.
6. The tensioning device of claim 3, wherein the first mounting mechanism and the second mounting mechanism are symmetrically disposed about a center of the mounting member.
7. The tensioner as in claim 4, wherein the connecting arm is a bending arm, the bending portion of the bending arm is an end portion connected to the elastic member, and the end portion is bent away from the other connecting arm.
8. The tensioner as in claim 5, wherein the connecting arm is a bending arm, the bending portion of the bending arm is an end portion connected to the elastic member, and the end portion is bent in a direction approaching the other connecting arm.
9. A tensioner as claimed in any of claims 1 to 8, wherein the mounting member is a rectangular plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921294453.4U CN210461565U (en) | 2019-08-09 | 2019-08-09 | Tensioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921294453.4U CN210461565U (en) | 2019-08-09 | 2019-08-09 | Tensioning device |
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| Publication Number | Publication Date |
|---|---|
| CN210461565U true CN210461565U (en) | 2020-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921294453.4U Withdrawn - After Issue CN210461565U (en) | 2019-08-09 | 2019-08-09 | Tensioning device |
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| CN (1) | CN210461565U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110345214A (en) * | 2019-08-09 | 2019-10-18 | 北京中车重工机械有限公司 | A kind of tensioning apparatus |
| CN112919021A (en) * | 2021-04-19 | 2021-06-08 | 四川沃文特生物技术有限公司 | Tensioning mechanism and sample transmission system |
-
2019
- 2019-08-09 CN CN201921294453.4U patent/CN210461565U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110345214A (en) * | 2019-08-09 | 2019-10-18 | 北京中车重工机械有限公司 | A kind of tensioning apparatus |
| CN110345214B (en) * | 2019-08-09 | 2024-09-06 | 北京中车重工机械有限公司 | Tensioning device |
| CN112919021A (en) * | 2021-04-19 | 2021-06-08 | 四川沃文特生物技术有限公司 | Tensioning mechanism and sample transmission system |
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