A shrub plant pruning device applied to garden greening management

Abstract

This invention relates to the field of plant pruning technology and discloses a shrub pruning device for landscaping management. The device includes two sets of moving wheels, each set with a support leg fixedly connected to its top. Each support leg has a fixed plate fixedly connected to its top. A motor is mounted on the top of the fixed plate. A blocking mechanism is fixedly connected to the outer wall of the fixed plate. The blocking mechanism includes a second rotating plate with a sliding block slidably connected to its inner wall, and a first rotating plate. The first plate is rotatably connected to the second rotating plate via a first rotating shaft. By incorporating the blocking mechanism, this invention effectively prevents branches and leaves from flying around during shrub pruning, ensuring that pruned branches and leaves fall concentrated at the base of the shrub. This improves upon the problems of scattered and difficult-to-clean branches and leaves in traditional pruning operations and enhances the cleanliness of landscaping pruning work.

Description

Technical Field

[0001] This invention relates to the field of plant pruning technology, specifically to a shrub pruning device for use in landscape greening management. Background Technology

[0002] Shrubs are relatively short woody plants without a distinct main trunk, growing in clumps, and generally less than 6 meters tall. They are mostly broad-leaved plants, but some conifers, such as junipers, also belong to the shrub category. Shrubs can be divided into several categories based on their flowering, fruiting, and branch / trunk appearance; common examples include roses, azaleas, and peonies. They are highly adaptable, prefer sunlight, and are cold-hardy, drought-tolerant, and tolerant of poor soil. In ecosystems, they help conserve water and soil, provide habitats for animals, and are frequently used in landscape design, possessing high ornamental and economic value.

[0003] Patent application CN202110550439.1 discloses a shrub pruning device for landscaping management, including a rectangular base, a linkage lifting mechanism on the upper surface of the rectangular base, a hidden cross-cutting mechanism at one end of the linkage lifting mechanism, and an adjustable pruning mechanism at the lower end of the hidden cross-cutting mechanism.

[0004] In current shrub pruning operations in gardens, branches and leaves fly everywhere during the process. This phenomenon necessitates sweeping the surface after pruning, increasing the burden of subsequent cleanup work. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a shrub pruning device for use in garden greening management, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a shrub pruning device for garden greening management, comprising two sets of moving wheels, each set of moving wheels having a support leg fixedly connected to its top, each set of support legs having a fixed plate fixedly connected to its top, a motor mounted on the top of the fixed plate, and a blocking mechanism fixedly connected to the outer wall of the fixed plate;

[0007] The blocking mechanism includes:

[0008] A second rotating plate, wherein a sliding block is provided on the inner wall of the second rotating plate, and the sliding block is slidably connected to the inner wall of the second rotating plate;

[0009] A first rotating plate is rotatably connected to a second rotating plate via a first rotating shaft. The top of the sliding block is fixedly connected to the bottom of the first rotating plate. A first pull rope is fixedly connected to the side of the sliding block away from the second rotating plate, and the first pull rope passes through the second rotating plate.

[0010] A baffle is provided at the bottom of the baffle. Both ends of the sliding rod are fixedly connected to the inner wall of the baffle. The outer wall of the sliding rod is slidably connected to the inner wall of the first rotating plate, which is used to receive scattered branches and leaves.

[0011] According to the above technical solution, a second spring is fixedly connected to the bottom of the first rotating plate, the inner wall of the first pull rope away from the sliding block is slidably connected to the outer wall of the sliding rod, the top of the first pull rope is fixedly connected to the bottom of the second spring, a first spring is fixedly connected to the bottom of the first pull rope, the bottom of the first spring is fixedly connected to the bottom of the inner wall of the baffle, the top of the second spring is fixedly connected to the top of the inner wall of the baffle, the top of the first rotating plate is in contact with the bottom of the baffle, and the blocking mechanism is set in two sets, both of which are symmetrically arranged around the center of the fixed plate. The first pull rope is used to pull the sliding block to move.

[0012] According to the above technical solution, a reset mechanism is also included. The reset mechanism includes a bonding plate, the side of which is close to the second rotating plate is fixedly connected to the outer wall of the second rotating plate, a movable plate is provided on the inner wall of the bonding plate, the bottom of the movable plate is slidably connected to the bottom of the inner wall of the bonding plate, and a curved plate is fixedly connected to the left side of the movable plate. The movable plate is used to pull the curved plate to make displacement in distance.

[0013] According to the above technical solution, a third spring is fixedly connected to the side of the curved plate near the moving plate, and the side of the third spring away from the curved plate is fixedly connected to the outer wall of the moving plate. A rocking ball is fixedly connected to the bottom of the curved plate, and an elastic rod is fixedly connected to the side of the moving plate away from the curved plate. The rocking ball is used to slow down the descent speed of the moving plate.

[0014] According to the above technical solution, the side of the elastic rod away from the moving plate is fixedly connected to the right side of the inner wall of the bonding plate, a connecting rod is fixedly connected to the top of the moving plate, the side of the connecting rod near the sliding block is fixedly connected to the sliding block, and the reset mechanism is set in two sets, both of which are symmetrically arranged with respect to the center of the fixed plate. The connecting rod is used to drive the moving plate to move synchronously.

[0015] According to the above technical solution, it also includes an adjustment mechanism, which includes two sets of positioning blocks. Each of the two sets of positioning blocks is fixedly connected to a hanging plate on the side that is far apart from each other. A rotating plate is provided on the top of the hanging plate. Insertion rods are fixedly connected to the left and right sides of the rotating plate. The rotating plate is used to fix the position of the insertion rods.

[0016] According to the above technical solution, a second pull rope is fixedly connected to the inner wall of both sets of rotating plates, and a clamp is fixedly connected to the side of the second pull rope away from the insertion rod of both sets of plates. The side of the clamps close to the rotating plate of both sets of plates is slidably connected to the inner wall of the rotating plate. The insertion rod is used to fix the position of the second pull rope.

[0017] According to the above technical solution, a circular plate is fixedly connected to the bottom of the hanging plate, and a pull rod is in contact with both sides of the circular plate. An arc-shaped plate is fixedly connected to the bottom of each of the two sets of pull rods, and a blade is fixedly connected to the bottom of each of the two sets of arc-shaped plates. The motor output end is rotatably connected to the rotating plate and the circular plate through a second rotating shaft. The pull rod is used to adjust the height of the blade.

[0018] Compared with the prior art, the present invention provides a shrub pruning device for landscaping management, which has the following beneficial effects:

[0019] 1. By setting up a blocking mechanism, the present invention can effectively prevent branches and leaves from flying around when pruning shrubs, ensuring that the pruned branches and leaves fall concentrated at the bottom of the shrubs. This improves the problem of scattered branches and leaves that are difficult to clean up in traditional pruning operations, and also enhances the cleanliness of garden pruning work.

[0020] 2. By setting up a reset mechanism, the present invention will activate after the blocking mechanism has placed the branches and leaves, causing the first rotating plate that has completed the tilting action to reset. In this way, it can ensure that the device is not affected by the previous operation when it performs the next operation, thus ensuring the continuity and efficiency of the entire pruning operation process.

[0021] 3. By setting an adjustment mechanism, the present invention can adjust the blades when facing shrubs of different heights, ensuring that the pruning device is suitable for various scenarios. Furthermore, after the blades are adjusted, the adjustment mechanism can also ensure the stability of the blades, improving the reliability and efficiency of the pruning operation.

[0022] 4. By setting an insertion rod, the present invention can quickly fix the position of the clamp, and the operation is not too cumbersome when adjusting the position of the blade; when releasing the clamp, the insertion rod can also be operated quickly, ensuring that work efficiency can be effectively improved when pruning shrubs. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a cross-sectional view of the structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the baffle of the present invention;

[0026] Figure 4 This is a schematic diagram of the blocking mechanism of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the second rotating plate of the present invention;

[0028] Figure 6This is a schematic diagram of the reset mechanism of the present invention;

[0029] Figure 7 This is a schematic diagram of the adjustment mechanism of the present invention;

[0030] Figure 8 This is a schematic diagram of the rotating plate of the present invention.

[0031] In the diagram: 1. Moving wheel; 2. Support leg; 3. Fixed plate; 4. Motor; 5. Blocking mechanism; 501. Baffle; 502. First rotating plate; 503. Sliding rod; 504. Second rotating plate; 505. Sliding block; 506. First pull rope; 507. First spring; 508. Second spring; 6. Reset mechanism; 601. Adhesive plate; 602. Elastic rod; 603. Shaking ball; 604. Third spring; 605. Moving plate; 606. Connecting rod; 607. Curved plate; 7. Adjustment mechanism; 701. Positioning block; 702. Hanging plate; 703. Pulling rod; 704. Circular plate; 705. Arc plate; 706. Blade; 707. Rotating plate; 708. Second pull rope; 709. Clamp; 710. Insertion rod. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] Example 1: See Figures 1-5The present invention provides a technical solution: a shrub pruning device for garden greening management, comprising two sets of moving wheels 1, each set of moving wheels 1 having a support leg 2 fixedly connected to its top, each set of support legs 2 having a fixed plate 3 fixedly connected to its top, a motor 4 installed on the top of the fixed plate 3, and a blocking mechanism 5 fixedly connected to the outer wall of the fixed plate 3.

[0036] The blocking mechanism 5 includes a second rotating plate 504, with a sliding block 505 slidably connected to the inner wall of the second rotating plate 504; a first rotating plate 502 rotatably connected to the second rotating plate 504 via a first rotating shaft; the top of the sliding block 505 is fixedly connected to the bottom of the first rotating plate 502; a first pull rope 506 is fixedly connected to the side of the sliding block 505 away from the second rotating plate 504; the first pull rope 506 can pull the sliding block 505 to move it, ensuring that the first rotating plate 502 can rotate slowly when it loses support, preventing the branches and leaves on the first rotating plate 502 from scattering in all directions; the first pull rope 506 passes through the second rotating plate 504; and a sliding rod 503 is provided at the bottom of the baffle 501, with both ends of the sliding rod 503 fixedly connected to the inner wall of the baffle 501, and the outer wall of the sliding rod 503 connected to the first rotating plate 504. The inner wall of 502 is slidably connected. The first rotating plate 502 is used to receive scattered branches and leaves. The bottom of the first rotating plate 502 is fixedly connected to the second spring 508. After the second spring 508 is set, when the second spring 508 loses its pushing force, the first rotating plate 502 can move upward and quickly enter the next working state. The inner wall of the first pull rope 506 away from the sliding block 505 is slidably connected to the outer wall of the sliding rod 503. The top of the first pull rope 506 is fixedly connected to the bottom of the second spring 508. The bottom of the first pull rope 506 is fixedly connected to the first spring 507. The bottom of the first spring 507 is fixedly connected to the bottom of the inner wall of the baffle 501. The top of the second spring 508 is fixedly connected to the top of the inner wall of the baffle 501. The top of the first rotating plate 502 is in contact with the bottom of the baffle 501. The blocking mechanism 5 is set in two sets and is symmetrically arranged around the center of the fixed plate 3. The first pull rope 506 is used to pull the sliding block 505 to move.

[0037] The working principle of this embodiment is as follows: When shrubs are pruned, the surrounding area is not properly protected, causing pruned branches and leaves to scatter and affect the environment. Therefore, this mechanism is needed to address this. When workers prune shrubs, the flying branches and leaves will contact the baffle 501. After being blocked by the baffle 501, the branches and leaves will fall downwards, landing on top of the first rotating plate 502 at the bottom of the baffle 501 and remaining there. After pruning the shrubs, the worker pushes the first rotating plate 502 downwards along the sliding rod 503. As the first rotating plate 502 moves downwards, it drives the second rotating plate 504 at the bottom downwards, simultaneously causing the sliding block 505 to move downwards. When the first rotating plate 502 moves downwards, it presses the second spring 508. After sliding a certain distance, the sliding block 505 contacts the first pull rope 506 and is pressed downwards. The first pull rope 506 moves downwards under the push of the first rotating plate 502, causing the first spring 507 at the bottom to contract, and simultaneously pulling the sliding block 505 to slide within the second rotating plate 504. At this moment, the first rotating plate 502 loses the support of the sliding block 505 and tilts downward. The branches and leaves on the first rotating plate 502 slide down and slide down the first rotating plate 502 to the bottom of the shrub.

[0038] Example 2: Please refer to Figure 6Based on Embodiment 1, the present invention provides a technical solution that further includes a reset mechanism 6. The reset mechanism 6 includes a bonding plate 601. The side of the bonding plate 601 closest to the second rotating plate 504 is fixedly connected to the outer wall of the second rotating plate 504. A movable plate 605 is provided on the inner wall of the bonding plate 601. The bottom of the movable plate 605 is slidably connected to the bottom of the inner wall of the bonding plate 601. A curved plate 607 is fixedly connected to the left side of the movable plate 605. The movable plate 605 is used to pull the curved plate 607 to make a distance displacement. A third spring 604 is fixedly connected to the side of the curved plate 607 closest to the movable plate 605. By setting the third spring 604, the shaking ball 603 can be pushed to shake significantly, thereby increasing the swing force of the shaking ball 603. The third spring 604 also ensures that the curved plate 607 can return to its initial position after the work is completed. The side of the third spring 604 away from the curved plate 607 is fixedly connected to the outer wall of the movable plate 605. The curved plate 607 is fixedly connected to the wall. A rocking ball 603 is fixedly connected to the bottom of the curved plate 607. By setting the rocking ball 603, it can be ensured that when the first rotating plate 502 is tilted at an angle, the tilting speed of the first rotating plate 502 can be slowed down by the swinging force of the rocking ball 603, thereby avoiding the situation where the first rotating plate 502 tilts too fast and causes branches and leaves to fall. An elastic rod 602 is fixedly connected to the side of the moving plate 605 away from the curved plate 607. The rocking ball 603 is used to slow down the descent speed of the moving plate 605. The side of the elastic rod 602 away from the moving plate 605 is fixedly connected to the right side of the inner wall of the bonding plate 601. A connecting rod 606 is fixedly connected to the top of the moving plate 605. The side of the connecting rod 606 near the sliding block 505 is fixedly connected to the sliding block 505. The reset mechanism 6 is set in two sets and is symmetrically arranged with respect to the center of the fixed plate 3. The connecting rod 606 is used to drive the moving plate 605 to move synchronously.

[0039] The working principle of this embodiment is as follows: When the blocking mechanism 5 places the branches and leaves at the bottom of the shrub and cannot reset in time, the position will need to be adjusted during the next pruning. This mechanism can solve this problem. When the sliding block 505 slides inside the second rotating plate 504, it will drive the connecting rod 606 to move synchronously. When the connecting rod 606 moves, it will drive the moving plate 605 to move synchronously on the inner wall of the fitting plate 601. The movement of the moving plate 605 will drive the left curved plate 607 to move. The curved plate 607 has a certain elasticity and will shake when it moves. When it shakes, it will compress the third spring 604 to contract, and at the same time drive the shaking ball 603 to shake. After being compressed, the third spring 604 will rebound. When it rebounds, it will push the curved plate 607 to slide significantly. When the moving plate 605 moves, it will push the elastic plate to contract. When the first rotating plate 502 completes the tilting, the moving plate 605 loses the pushing force. At this time, the elastic rod 602 begins to rebound, pushing the moving plate 605 to reset.

[0040] Example 3: Please refer to Figures 7-8Based on Embodiments 1 and 2, the present invention provides a technical solution: the adjustment mechanism 7 includes two sets of positioning blocks 701. A hanging plate 702 is fixedly connected to the side of each set of positioning blocks 701 that is far apart from each other. A rotating plate 707 is provided on the top of the hanging plate 702. Insertion rods 710 are fixedly connected to both sides of the rotating plate 707. By setting the insertion rods 710, the second pull rope 708 can be quickly fixed, preventing the pull rod 703 from falling off when rotating. Furthermore, because the insertion rods 710 are easy to fix, adjusting the height of the blade 706 does not affect work efficiency. The rotating plate 707 is used to fix the position of the insertion rods 710. The second pull rope 708 is fixedly connected to the inner wall of both sets of rotating plates 707. By manipulating the second pull rope 708, the working state of the clamp 709 can be switched, realizing the adjustment of the position of the pull rod 703. When it is necessary to change the position of the pull rod 703... When the device is in the fixed state, the second pull rope 708 needs to be pulled to quickly release the lock without the need for cumbersome disassembly steps, which greatly reduces the workload. Both sets of second pull ropes 708 are fixedly connected to clamps 709 on the side away from the insertion rod 710. Both sets of clamps 709 are slidably connected to the inner wall of the rotating plate 707 on the side near the rotating plate 707. The insertion rod 710 is used to fix the position of the second pull ropes 708. A circular plate 704 is fixedly connected to the bottom of the hanging plate 702. Pull rods 703 are in contact with both sides of the circular plate 704. Arc plates 705 are fixedly connected to the bottom of both sets of pull rods 703. Blades 706 are fixedly connected to the bottom of both sets of arc plates 705. The output end of the motor 4 is rotatably connected to the rotating plate 707 and the circular plate 704 through the second rotating shaft. The pull rod 703 is used to adjust the height of the blade 706.

[0041] The working principle of this embodiment is as follows: When workers need to prune shrubs, they will encounter shrubs of different heights, which requires adjustment of the blade 706. This mechanism is needed to handle this. When the worker needs to adjust the height of the pull rod 703, they begin to rotate the insertion rod 710 upwards. When the insertion rod 710 moves out of the second pull rope 708, the worker moves the clamp 709, gradually moving it away from the rotating plate 707. The movement of the clamp 709 drives the second pull rope 708 to move. After the movement is complete, the appropriate clamp 709 opens to both sides and moves out from inside the pull rod 703. At this time, the worker adjusts the pull rod 703 to move it upwards or downwards. The movement of the pull rod 703 drives the arc plate 705 to move synchronously, and the movement of the arc plate 705 drives the blade 706 to move. Then, the motor 4 is started, which drives the circular plate 704 to rotate. After the circular plate 704 rotates, it drives the rotating plate 707 and the pull rod 703 to rotate synchronously.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A shrub pruning device for landscaping management, comprising two sets of moving wheels (1), each set of moving wheels (1) having a support leg (2) fixedly connected to its top, each set of support legs (2) having a fixed plate (3) fixedly connected to its top, and a motor (4) mounted on the top of the fixed plate (3), characterized in that, The outer wall of the fixed plate (3) is fixedly connected to a blocking mechanism (5); The blocking mechanism (5) includes: The second rotating plate (504) has a sliding block (505) on its inner wall, and the sliding block (505) is slidably connected to the inner wall of the second rotating plate (504). The first rotating plate (502) is rotatably connected to the second rotating plate (504) via a first rotating shaft, and the top of the sliding block (505) is fixedly connected to the bottom of the first rotating plate (502). A baffle (501) is provided at the bottom of the baffle (501) with a sliding rod (503). The upper and lower ends of the sliding rod (503) are fixedly connected to the inner wall of the baffle (501). The outer wall of the sliding rod (503) is slidably connected to the inner wall of the first rotating plate (502). The first rotating plate (502) is used to receive scattered branches and leaves. A first pull rope (506) is fixedly connected to the side of the sliding block (505) away from the second rotating plate (504). The first pull rope (506) passes through the second rotating plate (504). A second spring (508) is fixedly connected to the bottom of the first rotating plate (502). The inner wall of the side of the first pull rope (506) away from the sliding block (505) is slidably connected to the outer wall of the sliding rod (503). The top of the first pull rope (506) is fixedly connected to the bottom of the second spring (508). The bottom of the pull rope (506) is fixedly connected to a first spring (507). The bottom of the first spring (507) is fixedly connected to the bottom of the inner wall of the baffle (501). The top of the second spring (508) is fixedly connected to the top of the inner wall of the baffle (501). The top of the first rotating plate (502) is in contact with the bottom of the baffle (501). The blocking mechanism (5) is set in two sets and is symmetrically arranged with respect to the center of the fixed plate (3). The first pull rope (506) is used to pull the sliding block (505) to move.

2. The shrub pruning device for landscaping management according to claim 1, characterized in that: It also includes a reset mechanism (6), which includes a bonding plate (601). The bonding plate (601) is fixedly connected to the outer wall of the second rotating plate (504) on the side near the second rotating plate (504). A movable plate (605) is provided on the inner wall of the bonding plate (601). The bottom of the movable plate (605) is slidably connected to the bottom of the inner wall of the bonding plate (601). A curved plate (607) is fixedly connected to the left side of the movable plate (605). The movable plate (605) is used to pull the curved plate (607) to make a distance displacement.

3. A shrub pruning device for landscaping management according to claim 2, characterized in that: A third spring (604) is fixedly connected to the side of the curved plate (607) near the moving plate (605). The side of the third spring (604) away from the curved plate (607) is fixedly connected to the outer wall of the moving plate (605). A rocking ball (603) is fixedly connected to the bottom of the curved plate (607). An elastic rod (602) is fixedly connected to the side of the moving plate (605) away from the curved plate (607). The rocking ball (603) is used to slow down the descent speed of the moving plate (605).

4. A shrub pruning device for landscaping management according to claim 3, characterized in that: The elastic rod (602) is fixedly connected to the right side of the inner wall of the bonding plate (601) on the side away from the moving plate (605). A connecting rod (606) is fixedly connected to the top of the moving plate (605). The connecting rod (606) is fixedly connected to the sliding block (505) on the side close to the sliding block (505). The reset mechanism (6) is set in two sets and is symmetrically arranged with respect to the center of the fixed plate (3). The connecting rod (606) is used to drive the moving plate (605) to move synchronously.

5. A shrub pruning device for landscaping management according to claim 4, characterized in that: It also includes an adjustment mechanism (7), which includes two sets of positioning blocks (701). Each of the two sets of positioning blocks (701) is fixedly connected to a hanging plate (702) on the side away from each other. A rotating plate (707) is provided on the top of the hanging plate (702). Insertion rods (710) are fixedly connected to both the left and right sides of the rotating plate (707). The rotating plate (707) is used to fix the position of the insertion rods (710).

6. A shrub pruning device for landscaping management according to claim 5, characterized in that: The inner walls of both sets of rotating plates (707) are fixedly connected with second pull ropes (708). The side of each set of second pull ropes (708) away from the insertion rod (710) is fixedly connected with a clamp (709). The side of each set of clamps (709) near the rotating plate (707) is slidably connected to the inner wall of the rotating plate (707). The insertion rod (710) is used to fix the position of the second pull ropes (708).

7. A shrub pruning device for landscaping management according to claim 6, characterized in that: A circular plate (704) is fixedly connected to the bottom of the hanging plate (702). Pull rods (703) are in contact with both sides of the circular plate (704). Arc plates (705) are fixedly connected to the bottom of both sets of pull rods (703). Blades (706) are fixedly connected to the bottom of both sets of arc plates (705). The output end of the motor (4) is rotatably connected to the rotating plate (707) and the circular plate (704) through a second rotating shaft. The pull rod (703) is used to adjust the height of the blade (706).

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