Tree pruning device with protection effect

Abstract

The utility model relates to the related technical field of pruning devices, in particular to a tree pruning device with a protection effect. A portal frame is fixedly connected to the top of the bottom plate, a liftable protection frame is arranged on one side of the portal frame, and a rotating plate is arranged on the side, away from the portal frame, of the protection frame. Under the matching action of the portal frame, the protective frame, the rotating plate, the fixed teeth, the connecting block, the movable teeth and the rotating mechanism, trees can be trimmed in a reciprocating staggered mode of the movable teeth and the fixed teeth, the trimming area of the device is increased, the tree trimming speed of the tree trimming device is increased, and the tree trimming efficiency is improved. The tree pruning device is simple in structure and convenient to use, the working efficiency of workers is high, and the problems that the pruning area of the device is small, the pruning speed is low and the working efficiency of the workers is low due to the fact that an existing tree pruning device adopts a pruning blade autorotation mode to prune trees are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pruning devices, and particularly relates to a tree pruning device with a protection effect. Background Technique

[0002] Trees rely on their roots to absorb water to supply the leaves. Inevitably, some roots will be damaged during the transplantation process, affecting water absorption. At the same time, the leaves will also evaporate a large amount of water. Thus, the transplanted trees are prone to death. To improve the survival rate of transplanted trees, people trim a lot of the trees' leaves to reduce water evaporation and increase the survival rate. These branches are trimmed to make the tree grow better and more lush. The trimmed branches are those that are about to break, withered, or diseased. After trimming, the tree will not be affected, and it will also be more beautiful. Sometimes, when it rains or blows, the trees that are about to break may accidentally injure people, which is irresponsible for people's safety. Moreover, if not trimmed, those damaged trees may die. Therefore, trees need to be trimmed. A tree pruning device with a protection effect is a tree pruning device that has a protection effect on the instrument or on the personnel.

[0003] The utility model patent with the publication number of CN220915847U discloses a tree pruning device with a protection effect, belonging to the technical field of pruning devices. It aims to solve the problems in the prior art that during the actual use process, due to the need to frequently disassemble the blade and the threaded rod, the labor of personnel increases and the work efficiency decreases. At the same time, it does not have a protection effect, so the flying branches during work may cause harm to personnel, leading to potential safety hazards for personnel. Also, during the actual use process of the tree pruning device, due to the lack of a moving component, during work, personnel need to carry it manually, making it extremely inconvenient to use. Moreover, during continuous work, personnel need to carry the pruning device multiple times, and it does not have a horizontal telescopic component, so the pruning device does not have horizontal adjustment, which greatly increases the labor of personnel and results in extremely low work efficiency. The device includes a device base; a pruning component protection box installed above the device base; a pruning component protection box baffle movably connected to the pruning component protection box; an electric cylinder installed inside the pruning component protection box; a protective net located at the rear of the device base and the pruning component protection box; a telescopic plate penetrating the device base; a rotating shaft connected to the telescopic plate; a movable plate connected to the rotating shaft, and at the same time, a rotating rod is installed inside it, and the rotating rod is connected through the roller; a roller fixing ring installed outside the roller to prevent the pruning blade from being damaged and also prevent personnel from being scratched by the pruning blade. The protective net is used to prevent the flying branches from hurting personnel, and the moving component can be used to move and stably operate the device, and the telescopic component is used to make the pruning blade horizontally adjustable for pruning.

[0004] However, the above patent still has deficiencies: Although this patent can prune trees, it uses a method of rotating the pruning blade to prune trees, resulting in a small pruning area of the device and a slow pruning speed, thus making the work efficiency of the staff relatively low. Summary of the Invention

[0005] In order to make up for the above deficiencies, the present utility model provides a tree pruning device with a protective effect to solve the problem in the above-mentioned background technology that the existing tree pruning device uses a method of rotating the pruning blade to prune trees, resulting in a small pruning area of the device and a slow pruning speed, thus making the work efficiency of the staff relatively low.

[0006] The technical solution of the present utility model is as follows:

[0007] A tree pruning device with a protective effect includes: a bottom plate; a gantry is fixedly connected to the top of the bottom plate, a liftable protective frame is arranged on one side of the gantry, a rotating plate is arranged on the side of the protective frame away from the gantry, fixed teeth are arranged on the side of the rotating plate away from the protective frame, connecting blocks are fixedly connected to both ends of the fixed teeth, the connecting blocks are fixedly connected to the rotating plate, a movable tooth is arranged between the fixed teeth and the rotating plate, and the movable tooth is slidably connected to the protective frame; a rotating mechanism for controlling the reciprocating lifting of the movable tooth is arranged on the side of the movable tooth away from the fixed tooth; a telescopic mechanism for adjusting the angle of the rotating plate is arranged between the rotating plate and the protective frame.

[0008] Preferably, the rotating mechanism includes: a first rotating shaft is fixedly connected to the side of the movable tooth away from the fixed tooth, one end of the first rotating shaft away from the movable tooth penetrates through the rotating plate and extends to the linkage rod, the linkage rod is rotatably connected to the first rotating shaft, and a matching stroke groove is opened at the position of the rotating plate close to the first rotating shaft; one end of the linkage rod away from the first rotating shaft is rotatably connected to a second rotating shaft, a rotating block is fixedly connected to one end of the second rotating shaft, a first motor is arranged on the side of the rotating block away from the second rotating shaft, the output end of the first motor is fixedly connected to the rotating block, a motor frame is fixedly connected to the rotating plate close to the first motor, and the first motor is fixedly connected to the motor frame.

[0009] Preferably, a sliding strip is arranged at the bottom of the first rotating shaft, the sliding strip is fixedly connected to the movable tooth, a matching sliding groove is opened at the position of the rotating plate close to the movable tooth, and the sliding strip is slidably connected to the sliding groove.

[0010] Preferably, the telescopic mechanism includes: there are two first fixing blocks arranged between the rotating plate and the protective frame. Both of the two first fixing blocks are fixedly connected with the rotating plate. The two first fixing blocks are fixedly connected by a third rotating shaft. A rotating ring is sleeved on the outer surface of the middle part of the third rotating shaft. One side of the top of the rotating ring is provided with a hydraulic cylinder. The telescopic end of the hydraulic cylinder is fixedly connected with the rotating ring. One end of the hydraulic cylinder far away from the rotating ring is fixedly connected with a linkage block. A fourth rotating shaft is rotatably connected inside the linkage block. Both ends of the fourth rotating shaft are fixedly connected with second fixing blocks. The second fixing blocks are both fixedly connected with the protective frame; both sides of the top of the rotating plate are provided with third fixing blocks. The third fixing blocks are both fixedly connected with the protective frame. The two third fixing blocks are fixedly connected by a fifth rotating shaft. The rotating plate is rotatably connected with the fifth rotating shaft.

[0011] Preferably, a lifting block is fixedly connected to one side of the protective frame close to the gantry. A screw rod is threadedly connected inside the lifting block. The bottom end of the screw rod is rotatably connected with the bottom plate. The top end of the screw rod penetrates through the gantry and extends to the second motor. The second motor is fixedly connected with the gantry. The output end of the second motor is fixedly connected with the screw rod.

[0012] Preferably, sliding rods are arranged on both sides of the screw rod. Both ends of the sliding rods are respectively fixedly connected with the gantry and the bottom plate. The lifting block is slidably connected with the sliding rods.

[0013] Preferably, universal wheels with braking functions are fixedly connected to the four corners of the bottom of the bottom plate. A push rod is arranged on one side of the gantry far away from the protective frame. The push rod is fixedly connected with the bottom plate. The universal wheels cooperate with the push rod.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] Firstly, through the cooperation of the gantry, the protective frame, the rotating plate, the fixed teeth, the connecting block, the movable teeth and the rotating mechanism, the present utility model can trim the trees in a way that the movable teeth and the fixed teeth reciprocate and intersect, improving the trimming area of the device, thereby increasing the trimming speed of the tree trimming device for the trees, making the work efficiency of the staff relatively high, and solving the problem that the existing tree trimming device trims the trees by the self-rotation of the trimming blade, resulting in a smaller trimming area of the device and a slower trimming speed, and thus a lower work efficiency of the staff.

[0016] Second, through the combined action of the gantry, protective frame, rotating plate, fixed teeth, connecting blocks, movable teeth and the rotating mechanism, the utility model can adjust the pruning height and pruning angle of the device according to the needs of users, solving the problem that the original tree pruning device cannot adjust the pruning angle of the device according to the needs of users, resulting in poor practicability of the tree pruning device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a three-dimensional structural schematic diagram of a tree pruning device with a protective effect according to the utility model;

[0018] Figure 2 FIG. is a side sectional structural schematic diagram of a tree pruning device with a protective effect according to the utility model;

[0019] Figure 3 For the utility model Figure 2 The enlarged structural schematic diagram at A in;

[0020] Figure 4 For the utility model Figure 2 The enlarged structural schematic diagram at B in;

[0021] Figure 5 FIG. is a structural schematic diagram of the rotating mechanism of the utility model;

[0022] Figure 6 FIG. is a structural schematic diagram of the telescopic mechanism of the utility model;

[0023] Figure 7 FIG. is a schematic diagram of the internal structure of the gantry of the utility model.

[0024] In the figure:

[0025] 1, bottom plate; 2, gantry; 3, protective frame; 4, rotating plate; 5, fixed teeth; 6, connecting blocks; 7, movable teeth; 8, rotating mechanism; 9, telescopic mechanism; 10, first rotating shaft; 11, linkage rod; 12, stroke groove; 13, second rotating shaft; 14, rotating block; 15, first motor; 16, motor frame; 17, slide bar; 18, chute; 19, first fixing block; 20, third rotating shaft; 21, rotating ring; 22, hydraulic cylinder; 23, linkage block; 24, fourth rotating shaft; 25, second fixing block; 26, third fixing block; 27, fifth rotating shaft; 28, lifting block; 29, screw; 30, second motor; 31, slide rod; 32, universal wheel; 33, push rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] Please refer to Figures 1 to 7 , the above technical solutions of the present invention will be described in detail through the following embodiments:

[0028] A tree pruning device with a protective effect, comprising: a bottom plate 1; a gantry 2 is fixedly connected to the top of the bottom plate 1, a liftable protective frame 3 is arranged on one side of the gantry 2, a rotating plate 4 is arranged on the side of the protective frame 3 away from the gantry 2, a fixed tooth 5 is arranged on the side of the rotating plate 4 away from the protective frame 3, both ends of the fixed tooth 5 are fixedly connected with connecting blocks 6, the connecting blocks 6 are both fixedly connected with the rotating plate 4, a movable tooth 7 is arranged between the fixed tooth 5 and the rotating plate 4, and the movable tooth 7 is slidably connected with the protective frame 3; a rotating mechanism 8 for controlling the reciprocating lifting of the movable tooth 7 is arranged on the side of the movable tooth 7 away from the fixed tooth 5; a telescopic mechanism 9 for adjusting the angle of the rotating plate 4 is arranged between the rotating plate 4 and the protective frame 3. The user controls the reciprocating lifting movement of the movable tooth 7 between the fixed tooth 5 and the rotating plate 4 through the rotating mechanism 8. While the movable tooth 7 is reciprocatingly lifted, it cooperates with the fixed tooth 5 to prune the tree, so that the tree can be pruned in a way that the movable tooth 7 and the fixed tooth 5 reciprocate and intersect, which improves the pruning area of the device, and further improves the pruning speed of the tree pruning device for the tree, making the work efficiency of the staff relatively high, and solving the problem that the existing tree pruning device prunes the tree by the self-rotation of the pruning blade, resulting in a small pruning area of the device and a slow pruning speed, making the work efficiency of the staff relatively low. And the setting of the protective frame 3 can effectively prevent the pruned branches from splashing onto the staff behind the device.

[0029] As Figure 3 and Figure 5As shown, the rotation mechanism 8 includes: on one side of the movable gear 7 away from the fixed gear 5, a first rotating shaft 10 is fixedly connected. One end of the first rotating shaft 10 away from the movable gear 7 penetrates through the rotating plate 4 and extends to the linkage rod 11. The linkage rod 11 is rotatably connected to the first rotating shaft 10. A matching travel groove 12 is provided at a position on the rotating plate 4 close to the first rotating shaft 10. One end of the linkage rod 11 away from the first rotating shaft 10 is rotatably connected to a second rotating shaft 13. One end of the second rotating shaft 13 is fixedly connected to a rotating block 14. On one side of the rotating block 14 away from the second rotating shaft 13, a first motor 15 is provided. The output end of the first motor 15 is fixedly connected to the rotating block 14. A motor bracket 16 is fixedly connected to the rotating plate 4 close to the first motor 15. The first motor 15 is fixedly connected to the motor bracket 16. When the first motor 15 is started, the output end of the first motor 15 drives the rotating block 14. While the rotating block 14 rotates, it drives the second rotating shaft 13 to perform a circumferential movement. While the second rotating shaft 13 performs a circumferential movement, it drives one end of the linkage rod 11, causing the other end of the linkage rod 11 to drive the first rotating shaft 10 to perform a reciprocating lifting movement within the travel groove 12 inside the rotating plate 4. While the first rotating shaft 10 is lifting and lowering, it drives the movable gear 7, causing the movable gear 7 to perform a vertical reciprocating lifting movement between the fixed gear 5 and the rotating plate 4. While the movable gear 7 is reciprocatingly lifting and lowering, it will reciprocally intersect with the fixed gear 5, thereby pruning the trees.

[0030] As Figure 4 shown, a slide bar 17 is provided at the bottom of the first rotating shaft 10. The slide bar 17 is fixedly connected to the movable gear 7. A matching slide groove 18 is provided at a position on the rotating plate 4 close to the movable gear 7. The slide bar 17 is slidably connected to the slide groove 18. While the movable gear 7 is lifting and lowering, it drives the slide bar 17. The slide bar 17 slides flexibly within the slide groove 18 inside the rotating plate 4, thereby limiting the movable gear 7 and causing the movable gear 7 to perform a reciprocating vertical lifting movement.

[0031] As Figure 2 and Figure 6As shown in the figure, the telescopic mechanism 9 includes: There are two first fixing blocks 19 arranged between the rotating plate 4 and the protective frame 3. Both of the two first fixing blocks 19 are fixedly connected to the rotating plate 4. The two first fixing blocks 19 are fixedly connected by a third rotating shaft 20. A rotating ring 21 is sleeved on the outer surface of the middle part of the third rotating shaft 20. One side of the top of the rotating ring 21 is provided with a hydraulic cylinder 22. The telescopic end of the hydraulic cylinder 22 is fixedly connected to the rotating ring 21. One end of the hydraulic cylinder 22 far from the rotating ring 21 is fixedly connected with a linkage block 23. A fourth rotating shaft 24 is rotatably connected inside the linkage block 23. Both ends of the fourth rotating shaft 24 are fixedly connected with second fixing blocks 25. The second fixing blocks 25 are both fixedly connected to the protective frame 3; On both sides of the top of the rotating plate 4, there are third fixing blocks 26. The third fixing blocks 26 are both fixedly connected to the protective frame 3. The two third fixing blocks 26 are fixedly connected by a fifth rotating shaft 27. The rotating plate 4 is rotatably connected to the fifth rotating shaft 27. When the hydraulic cylinder 22 is started, while the telescopic end of the hydraulic cylinder 22 expands and contracts, it drives the rotating ring 21 through the cooperation of the linkage block 23, the fourth rotating shaft 24 and the second fixing block 25. The rotating ring 21 drives the third rotating shaft 20. The third rotating shaft 20 drives the first fixing block 19. The first fixing block 19 drives the rotating plate 4, so that the rotating plate 4 rotates around the fifth rotating shaft 27 as the center, thereby achieving the purpose of adjusting the trimming angle of the device.

[0032] As Figure 2 and Figure 7 shown in the figure, on one side of the protective frame 3 close to the gantry 2, there is a lifting block 28 fixedly connected. A screw rod 29 is threadedly connected inside the lifting block 28. The bottom end of the screw rod 29 is rotatably connected to the bottom plate 1. The top end of the screw rod 29 penetrates through the gantry 2 and extends to the second motor 30. The second motor 30 is fixedly connected to the gantry 2. The output end of the second motor 30 is fixedly connected to the screw rod 29. When the second motor 30 is started, the output end of the second motor 30 drives the screw rod 29. While the screw rod 29 rotates, it drives the lifting block 28. The lifting block 28 drives the protective frame 3, so that the protective frame 3 rises and falls, thereby achieving the purpose of adjusting the trimming height of the device.

[0033] As Figure 7 shown in the figure, on both sides of the screw rod 29, there are sliding rods 31. Both ends of the sliding rods 31 are fixedly connected to the gantry 2 and the bottom plate 1 respectively. The lifting block 28 is slidably connected to the sliding rods 31. While the screw rod 29 rotates, it drives the lifting block 28. The lifting block 28 vertically rises and falls inside the gantry 2 through the cooperation of the sliding rods 31.

[0034] As Figure 1 shown in the figure, at the four corners of the bottom of the bottom plate 1, there are universal wheels 32 with braking functions fixedly connected. On one side of the gantry 2 far from the protective frame 3, there is a push rod 33. The push rod 33 is fixedly connected to the bottom plate 1. The universal wheels 32 cooperate with the push rod 33, which is convenient for the user to move and fix the device.

[0035] Working principle: Start the first motor 15. The output end of the first motor 15 drives the rotating block 14. While the rotating block 14 rotates, it drives the second rotating shaft 13 to perform a planetary motion. While the second rotating shaft 13 performs a planetary motion, it drives one end of the linkage rod 11, causing the other end of the linkage rod 11 to drive the first rotating shaft 10 to perform a reciprocating lifting motion within the stroke groove 12 inside the rotating plate 4. While the first rotating shaft 10 is lifting and lowering, it drives the movable tooth 7. While the movable tooth 7 is lifting and lowering, it drives the slide bar 17. The slide bar 17 slides flexibly within the chute 18 inside the rotating plate 4, thereby limiting the movable tooth 7 and causing the movable tooth 7 to perform a reciprocating vertical lifting motion. While the movable tooth 7 is reciprocatingly lifting and lowering, it will reciprocally intersect with the fixed tooth 5, thereby pruning the tree. It is possible to prune the tree in a manner where the movable tooth 7 and the fixed tooth 5 reciprocally intersect, increasing the pruning area of the device, thereby increasing the pruning speed of the tree pruning device for the tree, resulting in a relatively high working efficiency for the staff, and solving the problem that the existing tree pruning device uses the method of the pruning blade rotating itself to prune the tree, resulting in a smaller pruning area of the device and a slower pruning speed, leading to a lower working efficiency for the staff. Additionally, the setting of the protective frame 3 can effectively prevent the pruned branches from splashing onto the staff behind the device.

[0036] Start the hydraulic cylinder 22. While the telescopic end of the hydraulic cylinder 22 expands and contracts, it drives the rotating ring 21 through the cooperation of the linkage block 23, the fourth rotating shaft 24, and the second fixed block 25. The rotating ring 21 drives the third rotating shaft 20, the third rotating shaft 20 drives the first fixed block 19, and the first fixed block 19 drives the rotating plate 4, causing the rotating plate 4 to rotate around the fifth rotating shaft 27 as the center, thereby achieving the purpose of adjusting the pruning angle of the device. Start the second motor 30. The output end of the second motor 30 drives the screw rod 29. While the screw rod 29 rotates, it drives the lifting block 28. The lifting block 28 performs a vertical lifting motion within the gantry 2 through the cooperation of the slide rod 31. While the lifting block 28 is lifting and lowering, it drives the protective frame 3, causing the protective frame 3 to lift and lower, thereby achieving the purpose of adjusting the pruning height of the device. The pruning height and pruning angle of the device can be adjusted according to the needs of the user, solving the problem that the original tree pruning device does not have the function of adjusting the pruning angle of the device according to the needs of the user, resulting in poor practicability of the tree pruning device.

[0037] Finally, it should be noted that: The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tree pruning device with protective effect, comprising: Bottom plate (1); The invention is characterized in that a gantry (2) is fixedly connected to the top of the bottom plate (1), a liftable protective frame (3) is arranged on one side of the gantry (2), a rotating plate (4) is arranged on the side of the protective frame (3) away from the gantry (2), a fixed tooth (5) is arranged on the side of the rotating plate (4) away from the protective frame (3), both ends of the fixed tooth (5) are fixedly connected to connecting blocks (6), the connecting blocks (6) are fixedly connected to the rotating plate (4), movable teeth (7) are arranged between the fixed teeth (5) and the rotating plate (4), and the movable teeth (7) are slidably connected to the protective frame (3); A rotating mechanism (8) for controlling the movable tooth (7) to reciprocate and rise and fall is provided on a side of the movable tooth (7) away from the fixed tooth (5); A telescopic mechanism (9) for adjusting the angle of the rotating plate (4) is provided between the rotating plate (4) and the protective frame (3).

2. A tree pruning device with protective effect as claimed in claim 1, characterized in that: The rotating mechanism (8) comprises: A first rotating shaft (10) is fixedly connected to a side of the movable tooth (7) away from the fixed tooth (5); an end of the first rotating shaft (10) away from the movable tooth (7) passes through the rotating plate (4) and extends to a linkage rod (11); the linkage rod (11) is rotatably connected to the first rotating shaft (10); and a matching travel groove (12) is provided on the rotating plate (4) near the first rotating shaft (10); One end of the linkage rod (11) away from the first rotating shaft (10) is rotatably connected to the second rotating shaft (13), one end of the second rotating shaft (13) is fixedly connected to a rotating block (14), a first motor (15) is provided on the side of the rotating block (14) away from the second rotating shaft (13), an output end of the first motor (15) is fixedly connected to the rotating block (14), a motor frame (16) is fixedly connected to the rotating plate (4) near the first motor (15), and the first motor (15) is fixedly connected to the motor frame (16).

3. A tree pruning device with protective effect as claimed in claim 2, characterized in that: A slide bar (17) is provided at the bottom of the first rotating shaft (10), and the slide bar (17) is fixedly connected to the movable tooth (7). A matching slide groove (18) is provided near the movable tooth (7) on the rotating plate (4), and the slide bar (17) is slidably connected to the slide groove (18).

4. A tree pruning device with protective effect as claimed in claim 1, characterized in that: The telescopic mechanism (9) comprises: Two first fixed blocks (19) are arranged between the rotating plate (4) and the protective frame (3), the two first fixed blocks (19) are fixedly connected to the rotating plate (4), the two first fixed blocks (19) are fixedly connected to each other via a third rotating shaft (20), a rotating ring (21) is sleeved on the middle outer surface of the third rotating shaft (20), a hydraulic cylinder (22) is arranged on one side of the top of the rotating ring (21), the telescopic end of the hydraulic cylinder (22) is fixedly connected to the rotating ring (21), the end of the hydraulic cylinder (22) away from the rotating ring (21) is fixedly connected to a linkage block (23), the linkage block (23) is rotatably connected to a fourth rotating shaft (24) inside, the two ends of the fourth rotating shaft (24) are fixedly connected to second fixed blocks (25), and the second fixed blocks (25) are fixedly connected to the protective frame (3); Third fixing blocks (26) are provided on both sides of the top of the rotating plate (4), and the third fixing blocks (26) are fixedly connected to the protective frame (3). The two third fixing blocks (26) are fixedly connected via a fifth rotating shaft (27), and the rotating plate (4) is rotatably connected to the fifth rotating shaft (27).

5. A tree pruning device with protective effect as claimed in claim 1, characterized in that: A lifting block (28) is fixedly connected to one side of the protection frame (3) close to the gantry (2); a screw rod (29) is internally threadedly connected to the lifting block (28); the bottom end of the screw rod (29) is rotationally connected to the bottom plate (1); the top end of the screw rod (29) passes through the gantry (2) and extends to the second motor (30); the second motor (30) is fixedly connected to the gantry (2); and the output end of the second motor (30) is fixedly connected to the screw rod (29).

6. A tree pruning device with protective effect as claimed in claim 5, characterized in that: Sliding rods (31) are provided on both sides of the screw rod (29), and the two ends of the sliding rod (31) are respectively fixedly connected to the gantry (2) and the bottom plate (1), and the lifting block (28) is slidably connected to the sliding rod (31).

7. A tree pruning device with protective effect as claimed in claim 1, characterized in that: The four bottom corners of the base plate (1) are fixedly connected with universal wheels (32) with a braking function, and a push rod (33) is provided on the side of the gantry (2) away from the protective frame (3), the push rod (33) is fixedly connected to the base plate (1), and the universal wheel (32) cooperates with the push rod (33).

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