A back branch pruning device for pear tree planting

Abstract

The application discloses a back-up branch pruning device for pear tree planting, which comprises a supporting mechanism, a turning adjusting mechanism, a shearing mechanism and a clamping mechanism. The turning adjusting mechanism is slidingly installed on the supporting mechanism, two shearing mechanisms are symmetrically installed on the two sides of the turning adjusting mechanism, the shearing mechanism is used for pruning the back-up branch, the turning adjusting mechanism is used for adjusting the position of the shearing mechanism, and the shearing mechanism is close to the back-up branch to be pruned. The clamping mechanism is installed at the bottom of the supporting mechanism, the clamping mechanism is used for clamping the pear tree branch, and the back-up branch pruning device is fixed on the pear tree branch. The back-up branch pruning device disclosed by the application is provided with the shearing mechanism, the shearing mechanism is used for pruning the back-up branch, the turning adjusting mechanism adjusts the position of the shearing mechanism during the pruning process of the back-up branch, the shearing mechanism is close to the back-up branch to be pruned, manual pruning is not needed, the pruning efficiency of the back-up branch is improved, and manpower and material resources are saved.

Description

Technical Field

[0001] This invention specifically relates to the field of back branch pruning technology, and more specifically to a back branch pruning device for pear tree planting. Background Technology

[0002] Back branches mainly refer to branches growing on the upper back of horizontal or oblique branches of fruit trees. They are mainly formed by the sprouting of buds on the back of branches or by the training of inner branches of upright branches.

[0003] Pear trees are perennial deciduous fruit trees belonging to the genus *Pyrus* in the family Rosaceae. Fruit trees exhibit both apical and dorsiflexion dominance. If the dorsiflexion branches are too vigorous, they will consume a large amount of the tree's nutrients, which is extremely detrimental to the enlargement of young fruit. To improve fruit yield, dorsiflexion branches need to be pruned. Dorsiflexion branches are those that grow parallel to and above the main branches. Currently, dorsiflexion branches are generally pruned manually, which is labor-intensive and costly. Summary of the Invention

[0004] The purpose of this invention is to provide a back branch pruning device for pear tree planting, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A back branch pruning device for pear tree planting includes a support mechanism, a steering adjustment mechanism, a cutting mechanism, and a clamping mechanism. The steering adjustment mechanism is slidably mounted on the support mechanism. Two cutting mechanisms are symmetrically mounted on both sides of the steering adjustment mechanism. The cutting mechanisms are used to prune back branches, and the steering adjustment mechanism is used to adjust the position of the cutting mechanisms so that they are close to the back branches to be pruned. The clamping mechanism is installed at the bottom of the support mechanism and is used to clamp pear tree branches, fixing the back branch pruning device to the pear tree branches. The clamping mechanism includes a clamping frame, a clamping block, and a limiting frame. The lower end of the clamping frame has an opening for accommodating pear tree branches, and the inner side of the clamping frame has several limiting grooves. The clamping block is slidably mounted inside the limiting grooves and is connected to the limiting grooves through several spring columns. A hydraulic cylinder is mounted on the clamping frame, and an oil passage is opened inside the clamping frame. The oil passage is connected to the clamping frame through a connecting pipe, which is a flexible hose.

[0007] As a further embodiment of the present invention: the support mechanism includes a frame and side plates symmetrically installed on both sides of the frame; the steering adjustment mechanism includes a sliding seat, a rotating seat, and a mounting plate; the sliding seat is slidably installed on the frame; the sliding seat is provided with a mounting bracket; the mounting bracket is connected to the mounting plate through at least one connecting bracket; and two rotating seats are symmetrically rotatably installed on both sides of the mounting plate.

[0008] As a further embodiment of the present invention: a gear ring is fixedly installed on the inner side of the rotating seat, a rotary motor is fixedly installed on the mounting bracket, a first gear is fixedly connected to the output end of the rotary motor, the first gear meshes with the gear ring, and the shearing mechanism is installed on the outer side of the mounting plate.

[0009] As a further embodiment of the present invention: an adjusting screw is rotatably mounted at the middle position of the frame, and two guide rods are symmetrically arranged on both sides of the adjusting screw on the frame. The guide rods are fixedly connected to the frame, and the sliding seat is slidably connected to the guide rods. The sliding seat is also threadedly connected to the adjusting screw. A drive motor for controlling the rotation of the adjusting screw is fixedly mounted on the side plate.

[0010] As a further embodiment of the present invention: the mounting bracket is rotatably mounted on the sliding seat, and a rotary motor is installed inside the sliding seat. The output end of the rotary motor is fixedly connected to the sliding seat, and the rotary motor is used to control the mounting bracket to rotate on the sliding seat.

[0011] As a further embodiment of the present invention: the shearing mechanism includes a robotic arm and a saw blade mounted on the free end of the robotic arm.

[0012] As a further embodiment of the present invention: two clamping mechanisms are installed at the bottom of the frame, and a rack is also installed laterally at the bottom of the frame. The clamping mechanisms are slidably installed at the bottom of the frame, and a second gear is rotatably installed on the clamping mechanism, the second gear meshing with the rack.

[0013] As a further embodiment of the present invention: a control motor is also fixedly installed on the clamping frame, and the output end of the control motor is fixedly connected to the second gear for driving the second gear to rotate.

[0014] As a further embodiment of the present invention: two limiting frames are provided, and the two limiting frames are rotatably installed at the opening of the clamping frame. The clamping frame is provided with a steering mechanism for controlling the rotation of the limiting frames. The steering mechanism includes an installation groove opened inside the clamping frame and a third gear rotatably installed inside the clamping frame. The installation groove is connected to the oil circuit, and the installation groove has an arc-shaped section. A slider is slidably installed inside the arc-shaped section. An arc-shaped rack is also slidably installed inside the clamping frame. One side of the arc-shaped rack is connected to the slider, and the other side of the arc-shaped rack meshes with the third gear.

[0015] As a further embodiment of the present invention: the limiting frame is rotatably mounted on the clamping frame via a rotating shaft, and the rotating shaft is fixedly connected to the third gear.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The back branch pruning device disclosed in the present invention is provided with a support mechanism, a steering adjustment mechanism, a cutting mechanism, and a clamping mechanism. The cutting mechanism is used to prune the back branches. The steering adjustment mechanism adjusts the position of the cutting mechanism during the back branch pruning process, so that the cutting mechanism is close to the back branch to be pruned. In addition, the clamping mechanism is installed at the bottom of the support mechanism. The clamping mechanism clamps the pear tree branch during the back branch pruning, so that the back branch pruning device is fixed on the pear tree branch, thereby eliminating the need for manual pruning, improving the efficiency of back branch pruning, and saving manpower and resources. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a back branch pruning device used in pear tree planting.

[0018] Figure 2 This is a schematic diagram of the support mechanism in a back branch pruning device used for pear tree planting.

[0019] Figure 3 for Figure 1 A magnified view of a portion of point A in the middle.

[0020] Figure 4 A side view of a back branch pruning device used for pear tree planting.

[0021] Figure 5 A side view of the frame and second gear of a back branch pruning device used for pear tree planting.

[0022] Figure 6 This is a schematic diagram of the clamping block in a back branch pruning device used for pear tree planting.

[0023] Figure 7 for Figure 6 A magnified view of a portion of point B in the middle.

[0024] In the diagram: 10-Support mechanism, 11-Frame, 12-Side plate, 13-Guide rod, 14-Adjusting screw, 15-Drive motor, 16-Rack, 20-Steering adjustment mechanism, 21-Sliding seat, 22-Mounting bracket, 23-Connecting bracket, 24-Rotating motor, 25-First gear, 26-Rotating seat, 27-Gear ring, 28-Mounting plate, 30-Shearing mechanism, 31-Manipulator, 32-Saw blade, 40-Clamping mechanism, 41-Second gear, 42-Clamping bracket, 421-Hydraulic cylinder, 422-Control motor, 43-Oil circuit, 44-Clamping block, 441-Connecting pipe, 442-Spring column, 45-Limiting bracket, 46-Steering mechanism, 461-Mounting groove, 462-Slider, 463-Arc rack, 464-Third gear, 465-Rotating shaft. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0026] Please see Figures 1-5 In this embodiment of the invention, a back branch pruning device for pear tree planting includes a support mechanism 10, a steering adjustment mechanism 20, a cutting mechanism 30, and a clamping mechanism 40. The steering adjustment mechanism 20 is slidably mounted on the support mechanism 10. Two cutting mechanisms 30 are symmetrically mounted on both sides of the steering adjustment mechanism 20. The cutting mechanisms 30 are used to prune back branches, and the steering adjustment mechanism 20 is used to adjust the position of the cutting mechanisms 30 so that the cutting mechanisms 30 are close to the back branches to be pruned. The clamping mechanism 40 is installed at the bottom of the support mechanism 10 and is used to clamp pear tree branches, so that the back branch pruning device is fixed on the pear tree branches.

[0027] In this embodiment, the support mechanism 10 includes a frame 11 and side plates 12 symmetrically mounted on both sides of the frame 11. The steering adjustment mechanism 20 includes a sliding seat 21, a rotating seat 26, and a mounting plate 28. The sliding seat 21 is slidably mounted on the frame 11 and has a mounting bracket 22. The mounting bracket 22 is connected to the mounting plate 28 via at least one connecting bracket 23. Two rotating seats 26 are symmetrically and rotatably mounted on both sides of the mounting plate 28. A gear ring 27 is fixedly mounted on the inner side of the rotating seat 26. A rotary motor 24 is fixedly mounted on the mounting bracket 22. A first gear 25 is fixedly connected to the output end of the rotary motor 24. The first gear 25 meshes with the gear ring 27. The rotary motor 24 drives the first gear 25 to rotate, causing the first gear 25 to drive the rotating seat 26 with the gear ring 27 to rotate on the mounting plate 28. The shearing mechanism 30 is mounted on the outer side of the mounting plate 28.

[0028] Furthermore, in this embodiment, an adjusting screw 14 is rotatably mounted at the middle position of the frame 11. Two guide rods 13 are symmetrically arranged on both sides of the adjusting screw 14 on the frame 11. The guide rods 13 are fixedly connected to the frame 11. The sliding seat 21 is slidably connected to the guide rods 13. The sliding seat 21 is also threadedly connected to the adjusting screw 14. A drive motor 15 for controlling the rotation of the adjusting screw 14 is fixedly mounted on the side plate 12. The drive motor 15 drives the adjusting screw 14 to rotate. The adjusting screw 14 controls the sliding seat 21 to slide along the frame 11, thereby adjusting the moving position of the sliding seat 21 on the frame 11, so that the shearing mechanism 30 is close to the back branch to be pruned.

[0029] Furthermore, in this embodiment, the mounting bracket 22 is rotatably mounted on the sliding seat 21, and a rotary motor (not shown in the figure) is installed inside the sliding seat 21. The output end of the rotary motor is fixedly connected to the sliding seat 21. The rotary motor is used to control the mounting bracket 22 to rotate on the sliding seat 21, and further adjust the position of the shearing mechanism 30 so that the shearing mechanism 30 can approach the back branch at any position.

[0030] Please refer to it again. Figure 1 In this embodiment of the application, the shearing mechanism 30 includes a robotic arm 31 and a saw blade 32 installed at the free end of the robotic arm 31. The robotic arm 31 can be a multi-degree-of-freedom robotic arm device in the prior art, so as to adjust the cutting position of the saw blade 32 in multiple directions, so that the saw blade 32 can prune the back branches in any growth direction.

[0031] Please see Figure 4 and Figure 5 In this embodiment of the invention, two clamping mechanisms 40 are installed at the bottom of the frame 11, and a rack 16 is also horizontally installed at the bottom of the frame 11. The clamping mechanisms 40 are slidably installed at the bottom of the frame 11, and a second gear 41 is rotatably installed on the clamping mechanism 40. The second gear 41 meshes with the rack 16. During the process of fixing the pruning device to the pear tree branch using the clamping mechanism 40, one clamping mechanism 40 is controlled to maintain a clamping state while the other clamping mechanism 40 remains in a released state, driving the device to be in a clamping state. The second gear 41 on the clamping mechanism 40 rotates, and the second gear 41 cooperates with the rack 16 to drive the frame 11 to move. Then, the clamping mechanism 40 in the clamping state is changed to the loosening state, and the clamping mechanism 40 in the loosening state is changed back to the clamping state. The second gear 41 on the clamping mechanism 40 in the clamping state is driven to rotate again, which can drive the frame 11 to move on the pear tree branch, so that the entire pruning equipment is close to the back branch to be pruned, improving the pruning efficiency of the back branch, and eliminating the need to manually adjust the position of the pruning equipment, saving manpower. Example 2

[0032] Please see Figures 1-5 In this embodiment of the invention, a back branch pruning device for pear tree planting includes a support mechanism 10, a steering adjustment mechanism 20, a cutting mechanism 30, and a clamping mechanism 40. The steering adjustment mechanism 20 is slidably mounted on the support mechanism 10. Two cutting mechanisms 30 are symmetrically mounted on both sides of the steering adjustment mechanism 20. The cutting mechanisms 30 are used to prune back branches, and the steering adjustment mechanism 20 is used to adjust the position of the cutting mechanisms 30 so that the cutting mechanisms 30 are close to the back branches to be pruned. The clamping mechanism 40 is installed at the bottom of the support mechanism 10 and is used to clamp pear tree branches, so that the back branch pruning device is fixed on the pear tree branches.

[0033] In this embodiment, the support mechanism 10 includes a frame 11 and side plates 12 symmetrically mounted on both sides of the frame 11. The steering adjustment mechanism 20 includes a sliding seat 21, a rotating seat 26, and a mounting plate 28. The sliding seat 21 is slidably mounted on the frame 11 and has a mounting bracket 22. The mounting bracket 22 is connected to the mounting plate 28 via at least one connecting bracket 23. Two rotating seats 26 are symmetrically and rotatably mounted on both sides of the mounting plate 28. A gear ring 27 is fixedly mounted on the inner side of the rotating seat 26. A rotary motor 24 is fixedly mounted on the mounting bracket 22. A first gear 25 is fixedly connected to the output end of the rotary motor 24. The first gear 25 meshes with the gear ring 27. The rotary motor 24 drives the first gear 25 to rotate, causing the first gear 25 to drive the rotating seat 26 with the gear ring 27 to rotate on the mounting plate 28. The shearing mechanism 30 is mounted on the outer side of the mounting plate 28.

[0034] Furthermore, in this embodiment, an adjusting screw 14 is rotatably mounted at the middle position of the frame 11. Two guide rods 13 are symmetrically arranged on both sides of the adjusting screw 14 on the frame 11. The guide rods 13 are fixedly connected to the frame 11. The sliding seat 21 is slidably connected to the guide rods 13. The sliding seat 21 is also threadedly connected to the adjusting screw 14. A drive motor 15 for controlling the rotation of the adjusting screw 14 is fixedly mounted on the side plate 12. The drive motor 15 drives the adjusting screw 14 to rotate. The adjusting screw 14 controls the sliding seat 21 to slide along the frame 11, thereby adjusting the moving position of the sliding seat 21 on the frame 11, so that the shearing mechanism 30 is close to the back branch to be pruned.

[0035] Furthermore, in this embodiment, the mounting bracket 22 is rotatably mounted on the sliding seat 21, and a rotary motor (not shown in the figure) is installed inside the sliding seat 21. The output end of the rotary motor is fixedly connected to the sliding seat 21. The rotary motor is used to control the mounting bracket 22 to rotate on the sliding seat 21, and further adjust the position of the shearing mechanism 30 so that the shearing mechanism 30 can approach the back branch at any position.

[0036] Please refer to it again. Figure 1 In this embodiment of the application, the shearing mechanism 30 includes a robotic arm 31 and a saw blade 32 installed at the free end of the robotic arm 31. The robotic arm 31 can be a multi-degree-of-freedom robotic arm device in the prior art, so as to adjust the cutting position of the saw blade 32 in multiple directions, so that the saw blade 32 can prune the back branches in any growth direction.

[0037] Please see Figure 4 and Figure 5 In this embodiment of the invention, two clamping mechanisms 40 are installed at the bottom of the frame 11, and a rack 16 is also horizontally installed at the bottom of the frame 11. The clamping mechanisms 40 are slidably installed at the bottom of the frame 11, and a second gear 41 is rotatably installed on the clamping mechanism 40. The second gear 41 meshes with the rack 16. During the process of fixing the pruning device to the pear tree branch using the clamping mechanism 40, one clamping mechanism 40 is controlled to maintain a clamping state while the other clamping mechanism 40 remains in a released state, driving the device to be in a clamping state. The second gear 41 on the clamping mechanism 40 rotates, and the second gear 41 cooperates with the rack 16 to drive the frame 11 to move. Then, the clamping mechanism 40 in the clamping state is changed to the loosening state, and the clamping mechanism 40 in the loosening state is changed back to the clamping state. The second gear 41 on the clamping mechanism 40 in the clamping state is driven to rotate again, which can drive the frame 11 to move on the pear tree branch, so that the entire pruning equipment is close to the back branch to be pruned, improving the pruning efficiency of the back branch, and eliminating the need to manually adjust the position of the pruning equipment, saving manpower.

[0038] Please see Figure 6 and Figure 7 The difference between Example 2 and Example 1 is as follows:

[0039] In Embodiment 2 of the present invention, the clamping mechanism 40 includes a clamping frame 42, a clamping block 44, and a limiting frame 45. The lower end of the clamping frame 42 is provided with an opening for accommodating pear tree branches. The inner side of the clamping frame 42 is provided with a plurality of limiting grooves. The clamping block 44 is slidably installed inside the limiting grooves, and the clamping block 44 is connected to the limiting grooves through a plurality of spring columns 442. During the clamping process, the clamping block 44 squeezes the pear tree branches under the elastic force of the spring columns 442, so that the clamping mechanism 40 is fixed on the pear tree branches.

[0040] Furthermore, in this embodiment, a hydraulic cylinder 421 is installed on the clamping frame 42, and an oil passage 43 is provided inside the clamping frame 42. The oil passage is connected to the clamping block 44 through a connecting pipe 441. The connecting pipe 441 is a flexible hose. When the hydraulic cylinder 421 is working, hydraulic oil is added into the oil passage 43, which increases the amount of hydraulic oil inside the connecting pipe 441. The connecting pipe 441 expands and drives the clamping block 44 to move toward the center of the clamping frame 42, further improving the stability of the clamping block 44 in clamping the pear tree branches.

[0041] Furthermore, in this embodiment, two limiting frames 45 are provided, and the two limiting frames 45 are rotatably mounted at the opening of the clamping frame 42. The clamping frame 42 is provided with a steering mechanism 46 for controlling the rotation of the limiting frames 45. The steering mechanism 46 includes an installation groove 461 opened inside the clamping frame 42 and a third gear 464 rotatably mounted inside the clamping frame 42. The installation groove 461 is connected to the oil passage 43, and the installation groove 461 has an arc-shaped section. A slider 462 is slidably mounted inside the arc-shaped section. An arc-shaped rack 463 is also slidably mounted inside the clamping frame 42. One side of the arc-shaped rack 463 is connected to the slider 462. The other side of the rack 463 meshes with the third gear 464. When the amount of hydraulic oil inside the oil circuit 43 increases, the hydraulic oil squeezes the slider 462 to slide along the arc section, thereby driving the arc rack 463 to rotate, which in turn drives the third gear 464 to rotate. The limiting frame 45 is rotatably mounted on the clamping frame 42 via the rotating shaft 465. The rotating shaft 465 is fixedly connected to the third gear 464. When the third gear 464 rotates, it controls the rotating shaft 465 connected to the third gear 464 to rotate, thereby controlling the limiting frame 45 to rotate, so that the limiting frame 45 deflects toward the center of the clamping frame 42 to clamp the pear tree branches and improve the clamping stability of the clamping mechanism 40 on the pear tree branches.

[0042] In addition, a control motor 422 is fixedly installed on the clamping frame 42. The output end of the control motor 422 is fixedly connected to the second gear 41 and is used to drive the second gear 41 to rotate.

[0043] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A backfruiting device for pear tree cultivation, characterized in that, The back-branch pruning device comprises a support mechanism (10), a turning adjusting mechanism (20), a shearing mechanism (30) and a clamping mechanism (40), the turning adjusting mechanism (20) is slidingly installed on the support mechanism (10), two shearing mechanisms (30) are symmetrically installed on the two sides of the turning adjusting mechanism (20), the shearing mechanisms (30) are used for shearing the back-branch, the turning adjusting mechanism (20) is used for adjusting the position of the shearing mechanism (30) so that the shearing mechanism (30) is close to the back-branch to be sheared, the clamping mechanism (40) is installed at the bottom of the support mechanism (10), the clamping mechanism (40) is used for clamping the branch of the pear tree so that the back-branch pruning device is fixed on the branch of the pear tree, the clamping mechanism (40) comprises a clamping frame (42), a clamping block (44) and a limiting frame (45), the lower end of the clamping frame (42) is provided with an opening for accommodating the branch of the pear tree, a plurality of limiting grooves are formed in the inner side of the clamping frame (42), the clamping block (44) is slidingly installed in the limiting grooves, and the clamping block (44) is connected with the limiting grooves through a plurality of spring columns (442), a hydraulic cylinder (421) is installed on the clamping frame (42), an oil channel (43) is formed in the clamping frame (42), the oil channel is connected with the clamping block (44) through a connecting pipe (441), and the connecting pipe (441) is in a soft pipe structure; The support mechanism (10) comprises a rack (11) and side plates (12) symmetrically installed on the two sides of the rack (11), the turning adjusting mechanism (20) comprises a sliding seat (21), a rotating seat (26) and an installation plate (28), the sliding seat (21) is slidingly installed on the rack (11), the sliding seat (21) is provided with an installation frame (22), the installation frame (22) is connected with the installation plate (28) through at least one connecting frame (23), and the two sides of the installation plate (28) are symmetrically provided with two rotating seats (26); The inner side of the rotating seat (26) is fixedly installed with a gear ring (27), the installation frame (22) is fixedly installed with a rotating motor (24), the output end of the rotating motor (24) is fixedly connected with a first gear (25), the first gear (25) is engaged with the gear ring (27), and the shearing mechanism (30) is installed on the outer side of the installation plate (28); An adjusting screw (14) is rotatably installed at the middle position of the rack (11), two guide rods (13) are symmetrically arranged on the two sides of the rack (11) and are fixedly connected with the rack (11), the sliding seat (21) is slidingly connected with the guide rods (13) and is threadedly connected with the adjusting screw (14), and a driving motor (15) for controlling the rotation of the adjusting screw (14) is fixedly installed on the side plate (12). The mounting frame (22) is rotatably installed on the sliding seat (21), a rotating motor is installed inside the sliding seat (21), the output end of the rotating motor is fixedly connected with the sliding seat (21), and the rotating motor is used for controlling the mounting frame (22) to rotate on the sliding seat (21). Two clamping mechanisms (40) are installed at the bottom of the rack (11), a rack (16) is also installed transversely at the bottom of the rack (11), the clamping mechanisms (40) are slidingly installed at the bottom of the rack (11), the second gears (41) are rotatably installed on the clamping mechanisms (40), and the second gears (41) are in mesh with the rack (16).

2. The equipment for back shoot pruning of pear trees according to claim 1, characterized in that, The shearing mechanism (30) comprises a mechanical arm (31) and a saw blade (32) installed at the free end of the mechanical arm (31).

3. The equipment for backfruiting of pear trees according to claim 2, characterized in that, The clamping frame (42) is also fixedly installed with a control motor (422), the output end of the control motor (422) is fixedly connected with the second gear (41), and the control motor (422) is used for driving the second gear (41) to rotate.

4. The equipment for backfruiting of pear trees according to claim 3, characterized in that, The limiting frames (45) are rotatably installed at the openings of the clamping frames (42), the clamping frames (42) are provided with a steering mechanism (46) for controlling the rotation of the limiting frames (45), the steering mechanism (46) comprises an installation groove (461) formed in the clamping frame (42) and a third gear (464) rotatably installed in the clamping frame (42), the installation groove (461) is in communication with the oil channel (43), the installation groove (461) has an arc-shaped section, a sliding block (462) is slidingly installed in the arc-shaped section, an arc-shaped rack (463) is also slidingly installed in the clamping frame (42), one side of the arc-shaped rack (463) is connected with the sliding block (462), and the other side of the arc-shaped rack (463) is in mesh with the third gear (464).

5. The equipment for backfruiting of pear trees according to claim 4, characterized in that, The limiting frames (45) are rotatably installed on the clamping frames (42) through rotating shafts (465), and the rotating shafts (465) are fixedly connected with the third gears (464).

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