CN117356284A - Pruning machine - Google Patents

Abstract

The application discloses pruner includes: a front end device comprising at least a cutting assembly extending along a longitudinal axis and a front housing supporting the cutting assembly; a back end device comprising at least a motor for driving the cutting assembly and a back housing supporting the motor; the connecting rod is used for connecting the front-end device and the rear-end device; a power supply device supported by the rear housing for supplying power to the motor; the operation assembly is used for being operated by a user to control the operation of the motor and at least comprises a first switch and a second switch, and the second switch is arranged on the front side of the first switch; the distance from the front end of the cutting assembly to the rear end of the rear housing is greater than or equal to 1.1m and less than or equal to 2.2m in the direction of the longitudinal axis. By adopting the scheme, the pruning machine which is compact in structure, portable to operate and good in cutting capacity and cutting height can be provided.

Description

Pruning machine

Technical Field

The application relates to a garden tool, in particular to a pruning machine.

Background

Pruning machines are used as garden-like tools that can be manipulated by a user to prune vegetation such as shrubs, hedges, etc. Pruning machines will typically include: the cutting device comprises a housing, a motor, a transmission device and a cutting assembly, wherein the cutting assembly comprises a first blade and a second blade which can generate relative motion to realize a cutting function. Most existing pruning machines cannot achieve the cutting height, the structural miniaturization and the portability.

Disclosure of Invention

In order to solve the defects in the prior art, the application provides a pruning machine which is suitable for being held by two hands and is more portable and safer.

In order to achieve the above object, the present application adopts the following technical scheme:

a pruner, comprising: a front end device comprising at least a cutting assembly extending along a longitudinal axis and a front housing supporting the cutting assembly; a back end device comprising at least a motor for driving the cutting assembly and a back housing supporting the motor; a connecting rod connecting the front end device and the rear end device; a power supply device supported by the rear housing for providing electrical power to the motor; the operation assembly is used for being operated by a user to control the operation of the motor and at least comprises a first switch and a second switch, and the second switch is arranged on the front side of the first switch; the distance from the front end of the cutting assembly to the rear end of the rear housing in the direction of the longitudinal axis is 1.1m or more and 2.2m or less.

Further, the pruner also comprises a transmission assembly and a transmission shaft, wherein the transmission assembly comprises a first transmission device and a second transmission device; the first transmission device is positioned in the rear shell, and the second transmission device is positioned in the front shell; the transmission shaft is connected with the first transmission device and the second transmission device and is used for transmitting power between the first transmission device and the second transmission device.

Further, the first transmission device is connected with the motor and is used for transmitting the power output by the motor to the transmission shaft; the second transmission device is connected with the cutting assembly and used for transmitting power on the transmission shaft to the cutting assembly.

Further, the connecting rod extends along the first axis direction and is formed with a through hole extending along the first axis direction, and at least part of the transmission shaft is positioned in the through hole.

Further, the second transmission device at least comprises a first bevel gear and a second bevel gear; the transmission shaft drives the first bevel gear to rotate around the first axis, and the first bevel gear drives the second bevel gear to rotate around the second axis; the first axis is perpendicular to the second axis.

Further, the first bevel gear is formed with a first tapered surface, and a distance between the second axis and the first tapered surface is less than or equal to 18mm.

Further, the rear housing is further formed with a coupling portion for coupling the power supply device, the power supply device being detachably coupled to the coupling portion; the rear housing further includes a receiving part for forming a first receiving space in which the motor is disposed; the main handle extends from a front end of the accommodating portion and is located on a front side of the coupling portion in the first axis direction.

Further, the power supply device is detachably connected to the combining part along the first direction or the second direction and is used for supplying power to the motor; the first direction is parallel to the first axis; the second direction intersects the first axis.

Further, in a reference plane perpendicular to the up-down direction, the orthographic projection of the motor on the plane overlaps with the orthographic projection of the power supply device on the reference plane.

Further, the motor drives the cutting assembly to operate when the first switch and the second switch are simultaneously operated.

Further, the first switch is arranged on the main handle, and the second switch is arranged on the connecting rod.

Further, the pruner further comprises an auxiliary handle fixedly mounted to the connecting rod, the auxiliary handle being located at a front side of the main handle in a front-rear direction; the first switch is arranged on the main handle, and the second switch is arranged on the auxiliary handle.

Drawings

Fig. 1 is a perspective view of a pruning machine as a specific embodiment;

fig. 2 is a perspective view of the pruner of fig. 1 with the rear casing disassembled;

FIG. 3 is a partial perspective view of the pruner of FIG. 1 with the front casing removed;

FIG. 4 is an exploded view of the first transmission in the front housing;

FIG. 5 is a perspective view of the tie rod assembly;

FIG. 6 is a perspective view of another view of the tie rod assembly of FIG. 5;

FIG. 7 is a perspective view of another embodiment of a cutting assembly suitable for use with the pruner of FIG. 1;

FIG. 8 is a partial exploded view of the cutting assembly of FIG. 7;

fig. 9 is a perspective view of the pruner of fig. 1 from another perspective;

fig. 10 is a perspective view of the pruner of fig. 1 from yet another perspective;

fig. 11 is a perspective view of the positional relationship between the auxiliary handle and the front housing;

FIG. 12 is a perspective view of the auxiliary handle, connecting rod and front housing of FIG. 1;

fig. 13 is a perspective view of the auxiliary handle of fig. 12 after disassembly.

Detailed Description

The present application is described in detail below with reference to the attached drawings and specific embodiments.

The pruning machine 100 shown in fig. 1 as an embodiment is used for a user to operate to cut various vegetation such as shrubs, hedges, etc. For convenience of explanation of the technical solution of the present application, the directions indicated by arrows in fig. 1 are defined as follows: upper, lower, left, right, front and rear.

Those of ordinary skill in the art will understand that relative terms (e.g., "about," "approximately," "substantially," etc.) used in connection with a quantity or condition are intended to encompass the stated value and have the meaning dictated by the context (e.g., the term includes at least the degree of error associated with measurement of the particular value, tolerances (e.g., manufacturing, assembly, use) associated with the particular value, etc.). Such terms should also be considered to disclose a range defined by the absolute values of the two endpoints. Relative terms may refer to a percentage (e.g., 1%,5%,10% or more) of the indicated value plus or minus. Of course, numerical values that do not take relative terms should also be construed as having particular values within tolerances.

As shown in fig. 1 to 4, the pruner 100 includes a front-end device 1, a rear-end device 2, and a link assembly 3. Wherein the front-end device 1 comprises a cutting assembly 70 for outputting power and a front housing 20 supporting the cutting assembly 70. The back end apparatus 2 includes a motor 30 for driving the cutting assembly 70 and a back housing 10 supporting the motor 30. The connecting rod assembly 3 connects the front end device 1 and the rear end device 2. Specifically, the connecting rod assembly 3 includes a connecting rod 60 extending in the direction of the first axis 102. The pruner 100 further includes a power supply 40 and a drive assembly 50. Wherein the transmission assembly 50 is used to effect transmission of power between the motor 30 and the cutting assembly 70. The power supply device 40 is used for supplying electric power to the motor 30. In this embodiment, the power supply device 40 may be a dc power source, such as a battery pack. Of course, the power supply device 40 may also be configured as an alternating current, such as a mains supply.

Specifically, the rear case 10 includes a receiving portion 11 for forming a first receiving space 111, a main handle 13 for a user to hold, and a coupling portion 12 for connecting the power supply device 40. The motor 30 and a part of the transmission assembly 50 are disposed in a first receiving space 111 formed in the receiving part 11. The front housing 20 is disposed at the front side of the rear housing 10, and a second receiving space (not shown) is formed for receiving a portion of the transmission assembly 50 and a portion of the cutting assembly 70. Wherein the cutting assembly 70 extends along a longitudinal axis 101. In the present embodiment, the front case 20 and the rear case 10 are located at both ends of the connection rod 60 for supporting the connection rod 60. In some embodiments, the main handle 13 is provided as a separate structure from the rear case 10. For example, the main handle 13 is independently sleeved on the connecting rod assembly 13, i.e. the main handle 13 is independently sleeved on the connecting rod 60. In some embodiments, the connecting rod 60 is formed with a grip portion directly thereon for a user to grip, thereby replacing the main handle 13. It will be appreciated that the main handle 13 for the user to grip is not provided separately, but is modified by the original structure so as to form the grip portion.

The motor 30 is disposed in the first accommodation space 111 at the rear side of the main handle 13 and at the upper side of the coupling portion 12. When the power supply device 40 is connected to the joint 12, in a plane perpendicular to the up-down direction, the projection of the motor 30 on the plane overlaps with the projection of the power supply device 40 on the plane. Specifically, the motor 30 includes a motor shaft 31 that rotates about a motor axis 301. In the present embodiment, the motor 30 is provided as an electric motor. In this way, the reasonable arrangement of the positions of the motors 30 can improve the balance of the whole machine of the pruner 100 and improve the user experience. Of course, the motor 30 may alternatively be disposed at other positions, for example, the front side of the main handle 13 or in the second accommodation space.

The power supply device 40 is detachably connected to the coupling portion 12 for supplying power to the motor 30. Specifically, the joint 12 is located at the rear side of the main handle 13 in the front-rear direction. In some embodiments, the power supply 40 is removably connected to the joint 12 in a first direction to power the motor 30. Wherein the first direction is parallel to the longitudinal axis 101 direction. In some embodiments, the power supply 40 is detachably connected to the junction 12 in the second direction to power the motor 30. Wherein the second direction intersects the longitudinal axis 101 direction. In some embodiments, the power supply 40 is removably connected to the junction 12 along a third direction to power the motor 30. Wherein the third direction obliquely intersects the longitudinal axis 101 direction. Of course, when the power supply device 40 is detachably connected to the joint 12 in the third direction, the joint 12 on the rear housing 10 needs to be appropriately changed, but does not affect the position within the rear housing 10, such as the motor 30. It should be appreciated that in some embodiments, the cutting angle of the cutting assembly 70 may be adjustable, and the longitudinal axis 101 described above should be understood to be the longitudinal axis 101 that results when the cutting assembly 70 is adjusted to be parallel or substantially parallel to the connecting rod 60.

In some embodiments, the power supply 40 includes a battery pack having a rated output voltage greater than or equal to 18V. Specifically, the rated output voltage of the battery pack was set to 56V. In other embodiments, the power supply 40 includes two or more battery packs. The battery pack can be a lithium battery pack, and comprises a plurality of electric core units which are electrically connected, wherein the number of the electric core units determines the nominal voltage and the power supply capacity of the battery pack. In the present application, the insertion direction of the power supply device 40 and the number of battery packs are not limited. In other embodiments, the power supply device 40 may also be provided as a battery pack built into the rear case 10.

As shown in fig. 2, the pruner 100 further includes: circuit board assembly 81, heat dissipating plate 82, and fan 83. The circuit board assembly 81 is electrically connected to the motor 30, the heat dissipating plate 82 is used for dissipating heat from the circuit board assembly 81, and the fan 83 is used for generating a heat dissipating airflow. The circuit board assembly 81, the heat dissipation plate 82, and the fan 83 are all disposed in the first accommodating space 111. The rear housing 10 is also formed with an air inlet 841 and an air outlet 842 communicating the inside and outside of the rear housing 10, and the fan 83 can generate a heat radiation air flow from the air inlet 841 into the rear housing 10 and through the motor 30 when rotating, thereby radiating heat from the motor 30.

The transmission assembly 50 is used to effect transmission of power between the motor 30 and the cutting assembly 70. In this embodiment, the transmission assembly 50 includes a first transmission 51 and a second transmission 52, and a drive shaft 53. The first transmission device 51 is connected to the motor 30 and disposed in a first receiving space 111 formed in the rear case 10. The second transmission 52 is disposed in a second receiving space formed by the front case 20. The drive shaft 53 extends in the direction of the first axis 102 for transmitting power between the first gear 51 and the second gear 52. The front housing 20 can also be understood as the housing of the second transmission 52.

Specifically, the first gear 51 includes a first gear tooth 511 and a second gear tooth 512. The first gear 511 is connected to the motor shaft 31 of the motor 30, and is driven by the motor shaft 31 to rotate around the motor axis 301. The second gear 512 is driven in rotation about the first axis 102 by the first gear 511. Wherein the motor axis 301 is parallel to the first axis 102. In the present embodiment, the first gear 511 and the second gear 512 are provided as helical gears. Thus, when the pruner 100 is in operation, the first transmission device 51 is less noisy and the transmission is smoother. In this way, the transmission assembly 50 can be greatly shortened in height in the up-down direction by adopting the primary transmission, so that the gravity center of the whole machine is closer to the connecting rod 60 when a user operates the pruning machine 100 to work, and the operation hand feeling of the user is improved.

A second transmission 52 is provided in the front housing 20 for converting rotation transmitted from the motor 30 into reciprocating motion of the cutting assembly 70. The second gear 52 includes a first bevel gear 521, a second bevel gear 522, and an eccentric shaft 525. Wherein, first bevel gear 521 is connected transmission shaft 53, is driven by transmission shaft 53 and rotates about first axis 102. The second bevel gear 522 is driven by the first bevel gear 521 to rotate about a second axis 103 perpendicular to the first axis 102. The second bevel gear 522 drives the eccentric shaft 525 in synchronous rotation about the second axis 103. In this embodiment, the first bevel gear 521 has a first tapered surface 5211, and the distance from the second axis 103 to the first tapered surface 5211 is 18mm or less. Further, the distance from the second axis 103 to the first tapered surface 5211 is 15mm or less. Further, the distance from the second axis 103 to the first tapered surface 5211 is 12mm or less.

The eccentric shaft 525 is further formed with a first eccentric portion 523 and a second eccentric portion 524. The first eccentric portion 523 and the second eccentric portion 524 are each rotatable about the second axis 103. Specifically, the first eccentric portion 523 is adapted to cooperate with the first blade 71 and the second eccentric portion 524 is adapted to cooperate with the second blade 72. In this embodiment, the centers of the first eccentric portion 523 and the second eccentric portion 524 are offset, and the centers of the first eccentric portion 523 and the second eccentric portion 524 are projected on a plane parallel to the first axis 102 at a certain distance. In this way, the second bevel gear 522 drives the first and second eccentric portions 523, 524 in rotation, which in turn causes relative movement of the first and second blades 71, 72 in a direction along the longitudinal axis 101.

In the present embodiment, the transmission assembly 50 is not as a whole, but is split into a first transmission 51 disposed at the rear side of the pruner 100 and a second transmission 52 disposed at the front side of the pruner 100. In this way, the weight of the transmission assembly 50 is uniformly distributed in the front-rear direction of the pruner 100, so that the balance of the whole machine can be effectively improved, and the use experience of a user is improved. On the other hand, in the present application, the second transmission device 52 adopts primary gear transmission, so that the volume of the transmission assembly 50 can be effectively reduced, and the weight of the whole machine can be reduced.

In some embodiments, a first oil injection port 22 communicating with the second receiving space is further formed on the front case 20, and the first oil injection port 22 is located at the engagement of the first bevel gear 521 and the second bevel gear 522 in the up-down direction. The user can inject the lubricating oil into the second transmission device 51 in the front housing 20 through the first oil injection port 22, so as to lubricate the transmission assembly, effectively reduce the abrasion of the transmission assembly, and prolong the service life of the transmission assembly. In this way, the user can quickly smear the lubricating oil injected into the front housing 20 on the first bevel gear 521 and the second bevel gear 522 under the action of the first bevel gear 521 and the second bevel gear 522, thereby having a good lubricating effect and simultaneously avoiding a large amount of lubricating oil from splashing on the inner wall of the front housing 20. In this embodiment, a second oil filling port 23 is further included for providing lubrication oil to the cutting assembly 70. The position of the second oil filling port 23 is a normal position, and will not be described in detail in this application.

In the present embodiment, the connection rod 60 connects the front case 20 and the rear case 10. The connecting rod 60 is formed with a first end 61 and a second end 62 extending in the direction of the first axis 102. Wherein the first end 61 of the connecting rod 60 is supported by the front housing 20, i.e. the first end 61 of the connecting rod 60 is fixedly connected to the front housing 20. The second end 62 of the connecting rod 60 is supported by the rear housing 10. Specifically, the second end 62 of the connecting rod 60 is supported by a gear box 513 provided in the rear housing 10 for accommodating the first transmission 51. I.e. the second end 62 of the connecting rod 60 is fixedly connected to the rear housing 10. Specifically, the front housing 20 forms or is connected with a first connection end 21 for connecting with a first end 61 of the connecting rod 60. A second connection end 5132 is formed or attached to the front face 5131 of the gearbox 513 for connecting the second end 62 of the connecting rod 60. In this embodiment, the first connecting end 21 of the front housing 20 is sleeved on the first end 61 of the connecting tube 60, and is assembled by fastening with screws. The second connecting end 5132 of the gear box 513 is sleeved on the second end 62 of the connecting rod 60, and is fixedly installed in a tight fit manner. Of course, it should be understood that the connection manner and connection position between the connection rod 60 and the front housing 20 and the rear housing 10 can be designed according to practical situations by those skilled in the art, and this is not limited in this application.

In some embodiments, referring to fig. 5 and 6, the connecting rod 60 extends along the first axis 102 and the connecting rod 60 is a hollow structure. It will be appreciated that the connecting rod 60 is formed with a first through hole 63 extending in the direction of the first axis 102, and that the drive shaft 53 is disposed in the first through hole 63 described above in the direction of the first axis 102. In some embodiments, the drive shaft 53 may also be provided as a hollow structure. In the present embodiment, the connection rod 60 includes a carbon fiber material, and the ratio of the density to the tensile strength of the connection rod 60 is greater than or equal to 4.5 kg/(m3·mpa) and less than or equal to 15 kg/(m3·mpa). The connecting rod 60 is manufactured using a profile molding process. Of course, the connecting rod 60 may be made of a material in which carbon fiber material and plastic are mixed.

In this way, the strength of the connecting rod 60 of the pruner 100 can meet the requirements of the front housing 20 and the cutting assembly 70, and at the same time, the weight of the front portion of the pruner 100 can be reduced, thereby improving the working efficiency of the user and being beneficial to improving the position of the center of gravity of the pruner 100. The use of the above materials can reduce the weight of the pruner 100, so that the user can save more effort in operation. In the present embodiment, the connecting rod 60 is provided in a circular tubular shape, and it is understood that the connecting rod 60 may be provided in a square tubular shape or other shapes.

In some embodiments, the connecting rod assembly 3 further includes a plurality of stops 64 between the connecting rod 60 and the drive shaft 63. Specifically, the limiting member 64 is sleeved on the driving shaft 53, so as to limit the connecting rod 60 and the driving shaft 53 on a plane perpendicular to the first axis 102. Of course, the stop member 64 may be directly connected to the inner wall of the connecting rod 60. Like this, after transmission shaft 53 installs in connecting rod 60, under the effect of a plurality of locating parts 64, transmission shaft 53 and connecting rod 60 still have higher stability when guaranteeing higher axiality, guarantee that the user is operating pruner 100 and is carrying out the multi-angle cutting, transmission shaft 53 homoenergetic is fixed in connecting rod 60 well, and guarantees higher axiality.

Referring to fig. 3 and 4, the cutting assembly 70 is used to perform a cutting function of the pruner 100. One portion of the cutting assembly 70 is received in a second receiving space formed by the front housing 20, and the other portion extends out of the second receiving space in the direction of the longitudinal axis 101. In this embodiment, the cutting assembly 70 includes a first blade 71 driven by the motor 30, a second blade 72 reciprocally movable relative to the first blade 71 along the longitudinal axis 101, and a blade holder 73 and guard teeth 74. Specifically, the cutting assembly 70 extends in the direction of the longitudinal axis 101. The first blade 71 and the second blade 72 are provided with a plurality of cutting teeth 711, and the plurality of cutting teeth 711 are equally spaced along the longitudinal axis 101. The guard teeth 74 are used to prevent the user's legs, arms, from extending between adjacent cutting teeth 711. Specifically, the inter-blade 73 is formed by mixing a carbon fiber material and a glass fiber material.

In some embodiments, the middle front housing 20 of the present application is also suitable for use with the cutting assembly 70a shown in fig. 7 and 8. Unlike the cutting assembly 70 of fig. 1, the cutting assembly 70a of the present embodiment can be replaced without opening the front housing 20 when replacement is required, which is more convenient.

Specifically, when a user needs to replace the first blade 71a on the cutting assembly 70a, the screw on the third fastener 73a is first loosened and removed, and the third fastener 73a is moved in the fourth direction so that the third fastener 73a can be removed from the front case 20. After the third fastener 73a is removed, the first blade 71a is moved in the fourth direction, and when the first hole 712a on the first blade 71a is moved to the fourth fastener 74a, the first blade 71a can be moved upward to be disengaged from the third fastener 73a. While the process of removing the first blade 71a is described above, it is understood that the steps of removing the second blade 72a and their mounting are also well known to those skilled in the art and will not be described in detail herein. Thus, the pruner 100 of the present application may employ both forms of cutting assemblies. Specifically, a cutting assembly requires first opening the front housing 20 and then performing an operation upon installation and removal. The other cutting assembly does not need to open the front housing 20 when changing the blade, and is more convenient and quick.

Referring to fig. 9, in the present embodiment, a distance L1 from the front end of the cutting assembly 70 of the pruner 100 to the rear end of the rear casing 10 is greater than or equal to 1.1m and less than or equal to 2.2m on the longitudinal axis 101. Further, a distance L1 from the front end of the cutting assembly 70 of the pruner 100 to the rear end of the rear casing 10 is greater than or equal to 0.9m and less than or equal to 1.8m. Further, a distance L1 from the front end of the cutting assembly 70 of the pruner 100 to the rear end of the rear casing 10 is greater than or equal to 0.7m and less than or equal to 1.5m. Therefore, the pruning machine can be operated by two hands, and is more portable and safer; on the other hand, the connecting rod structure is adopted, so that the pruning machine has a better cutting height, and is more beneficial to meeting different cutting demands of users.

Referring to fig. 9 and 10, the center of gravity G of the pruner 100 is located between the main handle 13 and the auxiliary handle 14 in the front-rear direction. Specifically, when the user makes a flush cut (as shown in fig. 9), the user holds the main grip 13 with one hand and holds the main grip portion 141 with the other hand, and at this time, the distance between the projection of the center of gravity G of the pruner 100 on the plane perpendicular to the up-down direction and the projection of the first axis 102 on the plane is relatively small, and is almost zero. When the user makes a flush cut (as shown in fig. 10), the user holds the main handle 13 with one hand and holds the side holding part 142 with the other hand, and at this time, the hand of the user holding the side holding part 142 can be as close to the connecting part 143 as possible, so that the center of gravity G of the pruner 100 is as close to the first axis 102 as possible, and thus the pruner 100 does not lean in the left-right direction, thereby achieving a more stable operation. In the present embodiment, a distance L4 from the center of gravity G of the pruner 100 to the first axis 102 is 0 or more and 30mm or less. Further, a distance L4 from the center of gravity G of the pruner 100 to the first axis 102 is 0 or more and 20mm or less. Further, a distance L4 from the center of gravity G of the pruner 100 to the first axis 102 is 0 or more and 10mm or less. The center of gravity of the pruning machine is set in the application, so that the balance of the whole machine can be ensured, and the fatigue feeling of a user in use is reduced.

Referring to fig. 2 and 12, the pruner 100 further comprises an auxiliary handle 14 located at the front side of the main handle 13 in the direction of the first axis 102. The user can hold the auxiliary handle 14 and the main handle 13 simultaneously with both hands to achieve a more stable operation when operating the pruner 100 to perform a cutting operation. In this embodiment, the main handle 13 and the motor 30 are disposed on the same side of the auxiliary handle 14, and the auxiliary handle 14 is closer to the cutting assembly 70 than the main handle 13. The auxiliary handle 14 is also spaced from the main handle 13 by a distance in the direction of the first axis 102, which enables a user to more stably control the pruner 100.

Specifically, the auxiliary handle 14 is provided as a D-shaped handle, and has a plurality of grip portions, which can satisfy the cutting demands of users in different directions, and is easy to operate and not fatigued. In this embodiment, the auxiliary handle 14 includes a main grip portion 141, a side grip portion 142, and a connecting portion 143. The main grip portion 141 and the side grip portion 142 are used for the other hand to be gripped by the user when performing the flush cut or the side cut. Specifically, the main grip portion 141 also extends in a direction perpendicular to the first axis 102, and the main grip portion 141 spans across the pruner 100 in the left-right direction. Thus, when the user makes a flush cut, the user can hold the main grip 13 with one hand and the main grip 141 of the auxiliary grip 14 with the other hand, thereby achieving stable cutting. The number of the side holding parts 142 is 2, the two side holding parts 142 are respectively arranged at two sides of the main holding part 141, the main holding part 141 is connected with the two side holding parts 142, the extending direction of the side holding parts 142 is mutually perpendicular to the extending direction of the main holding part 141, and the extending direction of the side holding parts 142 is obliquely intersected with the first axis 102. The connection portions 143 are respectively connected to the two side grip portions 142 for fixedly mounting the auxiliary handle 14 to the pruner 100. Specifically, in a plane perpendicular to the first axis 102, the projection of the auxiliary handle 14 in the plane surrounds the D-shaped area, and the projection of the connecting rod 60 in the plane is at least partially located in the D-shaped area.

In some embodiments, the auxiliary handle 14 is secured to the connecting rod 60 by a connection 143. In some embodiments, the auxiliary handle 14 is fixedly mounted to the first connection end 21 of the front housing 20 by a connection 143. In some embodiments, the auxiliary handle 14 is fixedly coupled to both the connection rod 60 and the first connection end 21 of the front housing 20 through the connection portion 143. In this embodiment, the connection portion 143 of the auxiliary handle 14 is connected to the connection rod 60 through the first locking device 145 and to the first connection end 21 of the front housing 20 through the second locking device 146. Referring to fig. 11, the first connection end 21 of the front case 20 is formed with a first end surface 211, and a distance L5 from the auxiliary handle 14 to a plane in which the first end surface 211 is located is 0 or more and 90mm or less. Further, the distance L5 from the auxiliary handle 14 to the plane in which the first end surface 211 is located is 0 or more and 70mm or less. Further, the distance L5 from the auxiliary handle 14 to the plane in which the first end surface 211 is located is 0 or more and 50mm or less. Further, the distance L5 from the auxiliary handle 14 to the plane in which the first end surface 211 is located is 0 or more and 20mm or less. It should be understood that the distance L5 refers to the distance from the side of the auxiliary handle 14 adjacent the first end surface 211 to the first end surface 211.

Specifically, the connection portion 143 is formed with a recess 1431 capable of accommodating the connection rod 60. During assembly, the connecting rod 60 is first placed in the second locking means 146, then placed in the above-mentioned recess 1431, and finally fixedly mounted to the first connection end 21 of the front housing 20 by the first fastener 1461, while the second locking means 146, the first locking means 145, and the connection portion 143 of the auxiliary handle 14 are fixed in the up-down direction by the second fastener 1462. In this way, the auxiliary handle 14 is fixedly mounted to the connecting rod 60 through the first locking device 145 and the second locking device 146, and the auxiliary handle 14 is also fixed to the first connecting end 21 of the front housing 20, so that the limit of the auxiliary handle 14 in all directions is realized, the stability of the auxiliary handle 14 is improved, and the safety performance of the whole machine is improved.

The pruner 100 further includes an operating component for user operation to control the state of the pruner 100. Referring to fig. 1, the operating assembly includes at least a first switch 131 and a second switch 144. The first switch 131 has a released state and a triggered state, and likewise the second switch 144 has a released state and a triggered state. The user can operate the first switch 131 and the second switch 144 to switch between the released state and the triggered state. The pruner 100 further comprises a control device for controlling the motor 30 to start when both the first switch 131 and the second switch 144 are in the triggered state. In this embodiment, the first switch 131 is provided as a trigger. It should be understood that the first switch 131 is only an external component to which a circuit assembly should be further connected, the circuit assembly being disposed in the space formed by the main handle 13.

Referring to fig. 10, a distance L2 from the first switch 131 to the first cutting tooth 7111 of the cutting assembly 70 in the front-rear direction is 0.12m or more and 1000mm or less. Specifically, the present invention relates to a method for manufacturing a semiconductor device. The first cutting tooth 7111 of the cutting assembly 70 may be the rearmost cutting tooth of the first blade 71 or the rearmost cutting tooth of the second blade 72. Further, the distance L2 from the first switch 131 to the first cutting tooth 7111 of the cutting assembly 70 is 0.2m or more and 0.9m or less in the front-rear direction. In the present embodiment, the distance L3 from the auxiliary handle 14 to the first cutting teeth 7111 of the cutting assembly 70 is 0.3m or more and 0.8m or less in the front-rear direction. Further, the distance L3 of the auxiliary handle 14 from the first cutting teeth 7111 of the cutting assembly 70 is 0.4m or more and 0.6m or less in the front-rear direction.

In some embodiments, the ratio of the distance of the first switch 131 to the first cutting tooth 7111 to the distance of the second switch 144 to the first cutting tooth 7111 is greater than or equal to 1 and less than or equal to 8.5. Further, the ratio of the distance from the first switch 131 to the first cutting tooth 7111 to the distance from the second switch 144 to the first cutting tooth 7111 is 2 or more and 6 or less. The ratio of the distance from the first switch 131 to the first cutting tooth 7111 to the distance from the second switch 144 to the first cutting tooth 7111 is 3 or more and 5 or less.

Specifically, the first switch 131 is mounted to the main handle 13 and constitutes a rotational connection with the main handle 13. The hand of the user holding the main handle 13 can operate the first switch 131 to rotate, switching it between the released state and the triggered state. In this embodiment, the first switch 131 is provided as a trigger. The second switch 144 is mounted to the auxiliary handle 14 and is in sliding connection with the auxiliary handle 14. The user's hand holding the auxiliary handle 14 can operate the second switch 144 to slide, switching it between the released state and the triggered state. Referring to fig. 13, the auxiliary handle 14 is formed with a third receiving space 146 for receiving a portion of the second switch 144. The second switch 144 is provided inside the auxiliary handle 14 and is provided substantially along the extending direction of the auxiliary handle 14. In this way, the user can easily trigger the second switch 144 at various cutting angles while operating the pruner 100. The second switch 144 is also connected to a signal line for outputting a signal or a power line for supplying power. In this embodiment, the power line and the signal line are wrapped with plastic and located outside the connecting tube 60, and extend to the circuit board assembly 81 in the rear housing 10 along the direction of the first axis 102. In some embodiments, the second switch 144 may also be configured as a wireless switch, that is, no signal line is provided between the second switch 144 and the control device, and signal transmission is performed by way of wireless communication.

In some embodiments, the second switch 144 may also be disposed on the connecting rod 60. Specifically, in the case where the pruner 100 is not provided with the auxiliary handle 14 or a grip portion for a user to grip is provided on the connecting rod 60, the second switch 144 is also provided on the connecting rod 60 accordingly.

In some embodiments, referring to fig. 1, the operation assembly further includes a speed adjusting unit, a display unit, a bluetooth module, and other control interfaces. The control interface described above may be provided on the rear housing 10 on the front side of the main handle 13. Of course, the control interface described above may be provided at other locations. Specifically, the speed regulating unit includes at least a speed regulating switch through which the user controls the rotational speed of the motor 30. The display unit may be used to display the current power of the power supply 40. The bluetooth module may be used for communication with other external devices or for communication between internal settings.

The foregoing has outlined and described the basic principles, main features and advantages of the present application. It will be appreciated by persons skilled in the art that the above embodiments are not intended to limit the present application in any way, and that all technical solutions obtained by means of equivalent substitutions or equivalent transformations fall within the scope of the present application.

Claims (12)

1. A pruner, comprising:

a front end device comprising at least a cutting assembly extending along a longitudinal axis and a front housing supporting the cutting assembly;

a back end device comprising at least a motor for driving the cutting assembly and a back housing supporting the motor;

a connecting rod connecting the front end device and the rear end device;

a power supply device supported by the rear housing for providing electrical power to the motor;

the operation assembly is used for being operated by a user to control the operation of the motor and at least comprises a first switch and a second switch, and the second switch is arranged on the front side of the first switch;

it is characterized in that the method comprises the steps of,

the distance from the front end of the cutting assembly to the rear end of the rear housing in the direction of the longitudinal axis is 1.1m or more and 2.2m or less.

2. The pruner of claim 1, further comprising a drive assembly and a drive shaft, the drive assembly comprising a first drive and a second drive; the first transmission device is positioned in the rear shell, and the second transmission device is positioned in the front shell; the transmission shaft is connected with the first transmission device and the second transmission device and is used for transmitting power between the first transmission device and the second transmission device.

3. The pruner as recited in claim 2, wherein the first transmission is coupled to the motor for transmitting power output by the motor to the drive shaft; the second transmission device is connected with the cutting assembly and used for transmitting power on the transmission shaft to the cutting assembly.

4. A pruner as claimed in claim 3, characterized in that the connecting rod extends in a first axial direction and is formed with a through hole extending in the first axial direction, at least part of the drive shaft being located in the through hole.

5. The pruner of claim 4, wherein the second transmission includes at least a first bevel gear and a second bevel gear; the transmission shaft drives the first bevel gear to rotate around the first axis, and the first bevel gear drives the second bevel gear to rotate around the second axis; the first axis is perpendicular to the second axis.

6. The pruner as recited in claim 5, wherein the first bevel gear is formed with a first conical surface, and the distance between the second axis and the first conical surface is less than or equal to 18mm.

7. The pruner as recited in claim 6, wherein the rear housing is further formed with a coupling portion for coupling the power supply device, the power supply device being detachably coupled to the coupling portion; the rear housing further includes a receiving portion for forming a first receiving space in which the motor is disposed.

8. The pruner of claim 7, wherein the power supply device is detachably connected to the combining part in a first direction or a second direction for supplying power to the motor; the first direction is parallel to the first axis; the second direction intersects the first axis.

9. The pruner as recited in claim 8, wherein in a reference plane perpendicular to the up-down direction, an orthographic projection of the motor on the plane overlaps an orthographic projection of the power supply device on the reference plane.

10. The pruner of claim 1, wherein the motor drives the cutting assembly in operation when the first switch and the second switch are simultaneously operated.

11. The pruner of claim 10, further comprising a main handle, the first switch being disposed on the main handle and the second switch being disposed on the connecting rod.

12. The pruner of claim 10, further comprising a main handle, the first switch being disposed on the main handle; the pruner further comprises an auxiliary handle fixedly mounted to the connecting rod, the auxiliary handle being located at a front side of the main handle in a front-rear direction; the first switch is arranged on the main handle, and the second switch is arranged on the auxiliary handle.