Electric high pruner

Abstract

The utility model relates to an electric high pruner, including saw head subassembly, transmission mechanism and protection shell, the handle that extends out behind on protection shell, transmission mechanism includes drive assembly, connecting shaft and output assembly, still include stop mechanism, stop mechanism sets up on the connecting shaft of transmission mechanism, stop mechanism includes steering assembly, brake assembly and rotary block, steering assembly includes sleeve and fixed assembly, fixed assembly is connected with sleeve fixedly, the outer ring of rotary block is fixedly connected with sleeve top, the inner ring is covered and is established on the connecting shaft, brake assembly is covered and is established on the connecting shaft and is located rotary block and drive assembly between, the first protruding portion that sets up on brake assembly upper end, rotary block lower end sets up second protruding portion, second protruding portion and brake assembly's top end contact. The scheme has increased the locking function, can lock the saw head when electrifying, has improved the security and practicality of high pruner, ensures that the user can be more safely in complex working environment high branch pruning operation.

Description

Technical Field

[0001] This utility model relates to the field of garden tool technology, and in particular to an electric high-branch shears. Background Technology

[0002] High-reach pruning shears, also known as high-position branch pruning saws, are one of the most commonly used garden machines for pruning trees in landscaping. Equipped with a sharp saw blade or chain, and driven by a motor or engine, they can quickly cut branches, greatly improving pruning efficiency and saving labor and time costs. They are especially suitable for pruning large numbers of trees.

[0003] Pruning shears are a widely used tool in garden maintenance, tree pruning, and the handling of high branches. Traditional pruning shears pose certain safety hazards during operation because the movement of the saw head is directly linked to the power supply; the saw head starts running when the power is on and only stops when the power is off. This design can easily lead to safety accidents in practical use. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an electric high-branch shear with an added locking function, which can lock the saw head when the power is on, effectively improving the safety and practicality of the high-branch shear, and ensuring that users can perform high-branch pruning operations more safely and flexibly in complex and ever-changing working environments.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0006] An electric high-branch shear includes a saw head assembly, a transmission mechanism, and a protective shell. The protective shell is located on the outer rear end of the saw head assembly, and a handle extends rearward from the protective shell. The transmission mechanism includes a drive assembly, a connecting shaft, and an output assembly. The drive assembly and the output assembly are both fixedly connected to the connecting shaft. The saw head assembly is connected to the output assembly, and the output assembly drives the saw head assembly to move. The shear also includes a stop mechanism, which is located on the connecting shaft of the transmission mechanism. The stop mechanism includes a steering assembly, a brake assembly, and a rotating block. The steering assembly includes a sleeve and a fixing assembly. The fixing assembly is fixedly connected to the sleeve. The outer ring of the rotating block is fixedly connected to the top of the sleeve, and the inner ring is sleeved on the connecting shaft. The brake assembly is sleeved on the connecting shaft and located between the rotating block and the drive assembly. The upper end of the brake assembly has a first protrusion, and the lower end of the rotating block has a second protrusion. The second protrusion contacts the top end of the brake assembly.

[0007] This design, through the cooperation of the steering assembly, braking assembly, and rotating block, not only allows the saw head assembly to flexibly adjust its direction, facilitating pruning operations at different angles and positions and adapting to various complex branch distributions, but also enables the saw head to be precisely held in a specific position when needed to stop or be positioned. Specifically, the operator rotates the steering assembly, causing the rotating block to change direction. Because the lower end of the rotating block has a second protrusion that contacts the top of the braking assembly, while the upper end of the braking assembly has a first protrusion, the second protrusion remains in contact with the top of the braking assembly as the rotating block rotates. The continuous movement of the second protrusion creates resistance against the first protrusion, causing the braking assembly to move downwards until it presses against the drive assembly. The drive assembly stops moving, power is no longer transmitted, and the saw head assembly stops moving, thus locking the saw head assembly.

[0008] Furthermore, the braking assembly includes a brake block and a spring. A limiting part is provided on the connecting shaft. The spring is mounted on the connecting shaft and its bottom abuts against the limiting part. The brake block is sleeved on the outside of the spring and is coaxially arranged with the connecting shaft. A first protrusion is located above the brake block. With this design, the bottom of the spring abuts against the limiting part of the connecting shaft, and the top pushes against the inside of the brake block, so that the brake block always maintains an upward preload. When the rotating block drives the second protrusion to move and abuts against the first protrusion on the brake block, the brake block moves down until it presses against the drive assembly, and the drive assembly stops moving. This braking assembly achieves a fast and stable braking effect through the ingenious cooperation of the spring and the brake block, while taking into account the compact structure and service life, effectively improving the safety and operational reliability of the electric high-branch shears.

[0009] Furthermore, the fixing component includes a retaining ring and a locking element. The locking element is rotatably connected to the handle, and the retaining ring is fixedly connected to the sleeve. The retaining ring has evenly spaced protrusions along its edge, and the locking element has a groove at its front end that engages with the edges of the protrusions. During operation, the operator presses the rear end of the locking element, which releases the retaining ring, allowing the sleeve to rotate to adjust the angle, thus locking or unlocking the saw head assembly. Once the sleeve has rotated to the desired angle, the operator can release the locking element, and its front end will re-engage with the protrusions on the retaining ring, securing it in place. This connection mechanism does not hinder the rotation of the sleeve and effectively prevents the saw head from deviating from its angle during operation, ensuring the accuracy and stability of angle adjustment.

[0010] Furthermore, the drive assembly includes a first helical gear, a second helical gear, and a drive device. The first helical gear is fixedly mounted on the connecting shaft, the brake block is located above the first helical gear, the second helical gear meshes with the first helical gear, and the drive device is fixedly connected to the inner ring of the second helical gear. This drive assembly achieves efficient and stable power transmission and locking effects through the synergistic action of the helical gear transmission and the brake block. Specifically, when the brake block moves downward under the action of the rotating block until it is in close contact with the upper surface of the first helical gear, the first helical gear will stop rotating, causing power to be unable to be transmitted to the saw head assembly, thereby stopping the saw head assembly from operating; conversely, when the brake block moves upward and disengages from the first helical gear, the first helical gear will resume its normal rotation state, thereby effectively transmitting power to the saw head assembly.

[0011] Furthermore, a mounting hole is provided at the top of the sleeve, and the outer wall of the rotating block is fixedly connected to the mounting hole. The sleeve is fitted over the outside of the stop mechanism and the drive assembly. The sleeve accommodates both the stop mechanism and the drive assembly internally, forming an integrated structure that facilitates miniaturization and weight reduction of the equipment. The outer wall of the rotating block is fixedly connected to the mounting hole at the top of the sleeve, achieving precise positioning and ensuring the coaxiality and relative position stability between the stop mechanism and the drive assembly, preventing offset or vibration during operation.

[0012] Furthermore, the saw head assembly includes a saw head, a connector, and a drive wheel. The drive wheel is meshed with the output assembly. Symmetrical auxiliary wheels are arranged on both sides of the drive wheel, eccentrically positioned relative to the drive wheel. One end of the connector is fixedly connected to the auxiliary wheel, and the other end is fixedly connected to the saw head. This structure, by eccentrically fixing the auxiliary wheels to the drive wheel and converting the rotational motion of the drive wheel into the reciprocating linear motion of the saw head through the connector, achieves efficient cutting and improves sawing efficiency and quality.

[0013] Furthermore, a first connecting bearing is fixedly mounted on the drive assembly, and a second connecting bearing is fixedly mounted on the output assembly. The outer ring of the first connecting bearing is fixedly connected to the inner wall of the sleeve, and the outer ring of the second connecting bearing is fixedly connected to the inner wall of the protective shell. Through the precise support of the first and second connecting bearings, the rotational movement of the drive assembly and the output assembly is smoother, effectively reducing vibration and noise, and improving the overall stability and reliability of the transmission. In addition, the use of bearings significantly reduces the frictional resistance between the drive assembly / output assembly and the sleeve / protective shell, reducing wear, extending the service life of the equipment, and lowering maintenance costs.

[0014] In summary, this electric high-branch shears, with the addition of a locking function, can lock the saw head while powered on, effectively improving the safety and practicality of the high-branch shears and ensuring that users can perform high-branch pruning operations more safely and flexibly in complex and changing working environments. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0016] Figure 1 This is a schematic diagram of the overall assembly structure of this utility model;

[0017] Figure 2 This is a partial structural schematic diagram of the present invention;

[0018] Figure 3 This is a partial cross-sectional view of the present invention;

[0019] Figure 4 This is a schematic diagram of the brake assembly and rotating block of this utility model;

[0020] The components include: saw head assembly-1, saw head-11, connector-12, drive wheel-13, auxiliary wheel-14, transmission mechanism-2, drive assembly-21, first helical gear-211, second helical gear-212, connecting shaft-22, limiting part-221, output assembly-23, protective shell-3, handle-4, stop mechanism-5, steering assembly-51, sleeve-511, fixing assembly-512, fixing ring-5121, locking part-5122, brake assembly-52, first protrusion-521, brake block-522, spring-523, rotating block-53, second protrusion-531, first connecting bearing-6, and second connecting bearing-7. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] In the description of this utility model, it should be understood that the orientation and positional relationship indicated by terms such as "up", "down", "left", "right", "front", "back", "vertical", "bottom", "inner", and "outer" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] like Figures 1 to 4The electric high-branch shears shown include a saw head assembly 1, a transmission mechanism 2, and a protective shell 3. The protective shell 3 is located on the outer rear end of the saw head assembly 1, and a handle 4 extends rearward from the protective shell 3. The transmission mechanism 2 includes a drive assembly 21, a connecting shaft 22, and an output assembly 23. The drive assembly 21 and the output assembly 23 are both fixedly connected to the connecting shaft 22. The saw head assembly 1 is connected to the output assembly 23, and the output assembly 23 drives the saw head assembly 1 to move. The shears also include a stop mechanism 5, which is mounted on the connecting shaft 22 of the transmission mechanism 2. The stop mechanism 5 includes a steering mechanism. The steering assembly 51 includes a sleeve 511 and a fixing assembly 512. The fixing assembly 512 is fixedly connected to the sleeve 511. The outer ring of the rotating block 53 is fixedly connected to the top of the sleeve 511, and the inner ring is sleeved on the connecting shaft 22. The brake assembly 52 is sleeved on the connecting shaft 22 and located between the rotating block 53 and the drive assembly 21. The upper end of the brake assembly 52 is provided with a first protrusion 521, and the lower end of the rotating block 53 is provided with a second protrusion 531. The second protrusion 531 contacts the top end of the brake assembly 52.

[0024] This design, through the cooperation of the steering component 51, the brake component 52, and the rotating block 53, not only allows the saw head assembly 1 to flexibly adjust its direction, facilitating pruning operations at different angles and positions and adapting to various complex branch distributions, but also enables the saw head assembly 1 to precisely maintain a specific position when it needs to stop or be positioned. Specifically, the operator rotates the steering component 51, causing the rotating block 53 to change direction. Because the lower end of the rotating block 53 is provided with a second protrusion 531 that contacts the top of the brake component 52, and the upper end of the brake component 52 is provided with a first protrusion 521, when the rotating block 53 rotates, the second protrusion 531 always contacts the top of the brake component 52. The continuous movement of the second protrusion 531 will cause it to abut against the first protrusion 521. The brake component 52 moves down until it presses against the drive component 21, the drive component 21 stops moving, power cannot be transmitted, and the saw head assembly 1 stops moving, thus achieving the locking of the saw head assembly 1.

[0025] Preferably, the brake assembly 52 includes a brake block 522 and a spring 523. A limiting part 221 is provided on the connecting shaft 22. The spring 523 is mounted on the connecting shaft 22 and its bottom abuts against the limiting part 221. The brake block 522 is sleeved on the outside of the spring 523 and is coaxially arranged with the connecting shaft 22. The first protrusion 521 is located above the brake block 522. With this design, the bottom of the spring 523 abuts against the limiting part 221 of the connecting shaft 22, and its top pushes against the inside of the brake block 522, so that the brake block 522 always maintains an upward preload. When the rotating block 53 drives the second protrusion 531 to move and abut against the first protrusion 521 on the brake block 522, the brake block 522 moves down until it presses against the drive assembly 21, and the drive assembly 21 stops moving. The brake assembly 52 achieves a fast and stable braking effect through the ingenious cooperation between the spring 523 and the brake block 522, while taking into account the compact structure and service life, effectively improving the safety and operational reliability of the electric high-branch shears.

[0026] Preferably, the fixing component 512 includes a fixing ring 5121 and a locking member 5122. The locking member 5122 is rotatably connected to the handle 4, and the fixing ring 5121 is fixedly connected to the sleeve 511. The fixing ring 5121 has evenly spaced protrusions (not shown in the figure) along its edge, and the locking member 5122 has a groove (not shown in the figure) at its front end, which engages with the edge of the protrusions. During operation, the operator needs to press the rear end of the locking member 5122. At this time, the locking member 5122 will release the fixing ring 5121, allowing the sleeve 511 to rotate to adjust the angle, thereby locking or unlocking the saw head assembly 1. When the sleeve 511 is rotated to the desired angle, the operator can release the locking member 5122, and its front end will re-engage with the protrusion on the fixing ring 5121, thereby achieving fixation. This connection mechanism does not hinder the rotation of the sleeve 511 and effectively prevents the saw head assembly 1 from deviating from its angle during operation, ensuring the accuracy and stability of angle adjustment.

[0027] Preferably, the drive assembly 21 includes a first helical gear 211, a second helical gear 212, and a drive device (not shown in the figure, but can be a common motor, etc.). The first helical gear 211 is fixedly mounted on the connecting shaft 22, the brake block 522 is located above the first helical gear 211, the second helical gear 212 meshes with the first helical gear 211, and the drive device is fixedly connected to the inner ring of the second helical gear 212. This drive assembly 21 achieves efficient and stable power transmission and locking through the synergistic effect of the helical gear transmission and the brake block 522. Specifically, when the brake block 522 moves downwards under the action of the rotating block 53 until it is in close contact with the upper surface of the first helical gear 211, the first helical gear 211 will stop rotating, causing power to be unable to be transmitted to the saw head assembly 1, thus stopping the saw head assembly 1 from operating; conversely, when the brake block moves upwards and disengages from the first helical gear 211, the first helical gear 211 will resume normal rotation, thereby effectively transmitting power to the saw head assembly 1.

[0028] Preferably, the top of the sleeve 511 has a mounting hole (not shown in the figure), and the outer wall of the rotating block 53 is fixedly connected to the mounting hole. The sleeve 511 is fitted onto the outside of the stop mechanism 5 and the drive assembly 21. The sleeve 511 accommodates both the stop mechanism 5 and the drive assembly 21 inside, forming an integrated structure, which facilitates the miniaturization and weight reduction of the equipment. The outer wall of the rotating block 53 is fixedly connected to the mounting hole at the top of the sleeve 511, achieving precise positioning and ensuring the coaxiality and relative position stability between the stop mechanism 5 and the drive assembly 21, avoiding offset or vibration during operation.

[0029] Preferably, the saw head assembly 1 includes a saw head 11, a connector 12, and a drive wheel 13. The drive wheel 13 is meshed with the output assembly 23. Secondary wheels 14 are symmetrically arranged on both sides of the drive wheel 13, and are eccentrically positioned relative to the drive wheel 13. One end of the connector 12 is fixedly connected to the secondary wheel 14, and the other end is fixedly connected to the saw head 11. With this structure, the secondary wheels 14 are eccentrically fixed to the drive wheel 13, and the rotational motion of the drive wheel 13 is converted into the reciprocating linear motion of the saw head 11 through the connector 12, achieving efficient cutting and improving sawing efficiency and cutting quality.

[0030] Preferably, a first connecting bearing 6 is fixedly mounted on the drive assembly 21, and a second connecting bearing 7 is fixedly mounted on the output assembly 23. The outer ring of the first connecting bearing 6 is fixedly connected to the inner wall of the sleeve 511, and the outer ring of the second connecting bearing 7 is fixedly connected to the inner wall of the protective shell 3. Through the precise support of the first connecting bearing 6 and the second connecting bearing 7, the rotational movement of the drive assembly 21 and the output assembly 23 is smoother, effectively reducing vibration and noise, and improving the overall stability and reliability of the transmission. Furthermore, the use of bearings significantly reduces the frictional resistance between the drive assembly 21 and the output assembly 23 and the sleeve 511 and the protective shell 3, reducing wear, extending the service life of the equipment, and lowering maintenance costs.

[0031] In summary, this electric high-branch shears, with the addition of a locking function, can lock the saw head while powered on, effectively improving the safety and practicality of the high-branch shears and ensuring that users can perform high-branch pruning operations more safely and flexibly in complex and changing working environments.

[0032] In summary, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electric high-branch shears, comprising a saw head assembly, a transmission mechanism, and a protective shell, wherein the protective shell is disposed on the outer rear end of the saw head assembly, and a handle extends rearward from the protective shell; the transmission mechanism comprises a drive assembly, a connecting shaft, and an output assembly, wherein the drive assembly and the output assembly are both fixedly connected to the connecting shaft; the saw head assembly is connected to the output assembly; and the output assembly drives the saw head assembly to move; characterized in that: it further comprises a stop mechanism, wherein the stop mechanism is disposed on the connecting shaft of the transmission mechanism; the stop mechanism comprises a steering assembly, a brake assembly, and a rotating block; the steering assembly comprises a sleeve and a fixing assembly, wherein the fixing assembly is fixedly connected to the sleeve; the outer ring of the rotating block is fixedly connected to the top of the sleeve, and the inner ring is sleeved on the connecting shaft; the brake assembly is sleeved on the connecting shaft and located between the rotating block and the drive assembly; the upper end of the brake assembly is provided with a first protrusion, and the lower end of the rotating block is provided with a second protrusion, the second protrusion contacting the top end of the brake assembly.

2. The electric high-branch shears according to claim 1, characterized in that: The brake assembly includes a brake block and a spring. A limiting part is provided on the connecting shaft. The spring is mounted on the connecting shaft and its bottom abuts against the limiting part. The brake block is sleeved on the outside of the spring and is coaxially arranged with the connecting shaft. The first protrusion is located above the brake block, and the second protrusion contacts the top of the brake block.

3. The electric high-branch shears according to claim 1, characterized in that: The fixing component includes a fixing ring and a locking member. The locking member is rotatably connected to the handle, and the fixing ring is fixedly connected to the sleeve. The fixing ring has protrusions evenly spaced along its edge, and the locking member has a groove at its front end. The groove engages with the edge of the protrusion.

4. The high-branch pruning shears according to claim 2, characterized in that: The drive assembly includes a first helical gear, a second helical gear, and a drive device. The first helical gear is fixedly mounted on a connecting shaft. The brake block is located above the first helical gear. The second helical gear meshes with the first helical gear. The drive device is fixedly connected to the inner ring of the second helical gear.

5. The high-branch pruning shears according to claim 1, characterized in that: The top of the sleeve has a mounting hole, the outer wall of the rotating block is fixedly connected to the mounting hole, and the sleeve is sleeved on the outside of the stop mechanism and the drive assembly.

6. The high-branch pruning shears according to claim 5, characterized in that: The saw head assembly includes a saw head, a connector, and a drive wheel. The drive wheel is meshed with the output assembly. A secondary wheel is symmetrically arranged on two sides of the drive wheel. The secondary wheel is eccentrically arranged with respect to the drive wheel. One end of the connector is fixedly connected to the secondary wheel, and the other end is fixedly connected to the saw head.

7. The high-branch pruning shears according to claim 5, characterized in that: A first connecting bearing is fixedly mounted on the drive assembly, and a second connecting bearing is fixedly mounted on the output assembly. The outer ring of the first connecting bearing is fixedly connected to the inner wall of the sleeve, and the outer ring of the second connecting bearing is fixedly connected to the inner wall of the protective shell.

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