Efficient fertilizing device for pasture planting

Abstract

The invention relates to the technical field of pasture fertilization, and discloses an efficient fertilization device for pasture planting, the efficient fertilization device comprises a main body, the bottom of the main body is rotatably connected with a connecting shaft, and the left side and the right side of the connecting shaft are rotatably connected with moving wheels. When a rotating plate swings downwards, a sliding ring connected with the rotating plate pushes a sliding ring to slide downwards on the outer surface of an output shaft of a motor, when the sliding ring slides downwards, a spring is pulled to extend, potential energy is accumulated at the same time, and then when the motor is started, the rotating plate rotates in a small-amplitude conical state; therefore, the fertilizer is obliquely and downwards sown on the lawn, the sowing area of the fertilizer is reduced, small-amplitude sowing of a small amount of fertilizer is completed, the situation that when the small amount of fertilizer is sown in a small area, due to the fact that the rotating speed of the rotating plate is too high, the fertilizer is swung to be sown outwards, and the area becomes large is reduced, so that the fertilizer is sown more uniformly, and the sowing efficiency is improved. And the fertilizer spreading quality of the device during pasture planting is improved.

Description

Technical Field

[0001] This invention relates to the field of forage fertilization technology, specifically to a high-efficiency fertilization device for forage planting. Background Technology

[0002] In the artificial cultivation of forage grass, it is necessary to understand the physiological characteristics of different forage grasses. Scientific fertilization should be emphasized during the cultivation and management period. Before fertilization, the timing, type, and amount of fertilizer should be determined according to the soil conditions and forage grass species to meet the needs of forage grass growth, improve the yield and quality of forage grass per unit area, and ultimately lay a solid foundation for high and stable forage grass production. During the use of this device, fertilizer is first introduced into the bottom-closed placement frame. Then, the motor is started, which drives the rotating plate to rotate. After that, the feeding trough at the bottom of the placement frame is opened, and the fertilizer falls through the feeding trough onto the rotating plate. Under the centrifugal force of the rotating plate, it is thrown outward, thus completing the spreading work. Since the size of the feeding trough needs to be adjusted according to the area to be spread when spreading fertilizer, when spreading a small amount of fertilizer through a small feeding trough over a small area, the area to be spread may become larger due to the rotating plate rotating too fast, which affects the spreading effect of fertilizer and the quality of fertilizer spreading when planting pasture. Summary of the Invention

[0003] The purpose of this invention is to provide a high-efficiency fertilization device for forage planting, so as to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a high-efficiency fertilization device for forage planting, comprising a main body, a connecting shaft rotatably connected to the bottom of the main body, and movable wheels rotatably connected to the left and right sides of the connecting shaft, and further comprising: A rotating mechanism is installed at the bottom of the main body and is used to rotate the device during operation. The lifting mechanism is installed at the bottom of the rotating mechanism and is used to lift the main body during movement.

[0005] Furthermore, a motor is fixedly connected to the outer surface of the connecting shaft, and the main body also includes: The opening and closing assembly is installed on the top of the main body and is used to store fertilizer; A sliding component is installed at the bottom of the opening and closing component and is used to slide inside the opening and closing component.

[0006] Furthermore, the rotating mechanism includes: A rotating assembly is installed at the output end of the motor and is used to rotate under the drive of the motor. The oscillating component is installed inside the rotating component and is used to oscillate when the sliding component moves.

[0007] Furthermore, the lifting mechanism includes: The telescopic component is installed at the bottom of the rotating component and is used to extend or retract when the rotating component moves.

[0008] Furthermore, the opening and closing assembly includes a placement frame fixedly connected to the top of the main body, and the bottom of the placement frame has several material conveying grooves; The bottom of the placement frame is slidably connected to a movable ring, and the bottom of the movable ring is fixedly connected to a pull rod; The end of the pull rod furthest from the moving ring is rotatably connected to the side wall of the main body.

[0009] Furthermore, the sliding assembly includes a rotating rod slidably connected to the bottom of the placement frame, and several connecting rods are rotatably connected to the side wall of the rotating rod.

[0010] Furthermore, a sliding block is rotatably connected to the end of the connecting rod away from the rotating rod, and a pressing plate is fixedly connected to the bottom of one of the sliding blocks; Among them, the outer surfaces of several sliding blocks are slidably connected to the inner wall of the feeding trough, and the top of the connecting rod is attached to the bottom of the placement frame.

[0011] Furthermore, the rotating assembly includes a positioning ring fixedly connected to the motor output end, and a rotating plate is rotatably connected to the outer surface of the positioning ring; Several baffles are fixedly connected to the top of the rotating plate, and protruding rings are fixedly connected between the baffles; The bottom of several convex rings is fixedly connected to the top of the rotating plate.

[0012] Furthermore, the swing assembly includes positioning blocks fixedly connected to the left and right sides of the baffle, swing plates rotatably connected to the outer surfaces of two opposing positioning rings, and connecting rings fixedly connected to the interior of several swing plates. The sidewall of the swing plate contacts the bottom of the extrusion plate.

[0013] Furthermore, the telescopic assembly includes several push rods connected to the bottom of the rotating plate, with a sliding ring rotatably connected to the end of each push rod away from the rotating plate, and a spring fixedly connected to the top of the sliding ring; The inner wall of the sliding ring is slidably connected to the outer surface of the motor output shaft, and the top of the spring is fixedly connected to the bottom of the rotating plate.

[0014] The present invention has the following beneficial effects: (1) In this invention, when the rotating plate swings downward, it will push the sliding ring connected to it to slide downward on the outer surface of the motor output shaft. When the sliding ring slides downward, it will pull the spring to extend and accumulate potential energy. Then, when the motor starts, the rotating plate will rotate in a small-amplitude conical state, so that the fertilizer is spread obliquely downward on the lawn to reduce the area of ​​fertilizer spreading. This completes the small-amplitude spreading of a small amount of fertilizer, reducing the situation where the area of ​​fertilizer spreading becomes larger due to the rotating plate speed being too fast when spreading a small amount of fertilizer in a small area. This makes the fertilizer spreading more uniform and improves the fertilizer spreading quality of the device when planting pasture.

[0015] (2) In this invention, when the rotating plate rotates, a large amount of fertilizer will be thrown outward by centrifugal force. During the process of the fertilizer being thrown outward, some of the fertilizer will come into contact with the bottom of the swing plate. Since the bottom of the swing plate is inclined, after some of the fertilizer is thrown out and comes into contact with the inclined surface of the swing plate, it will bounce onto the land closer to the device. In addition, the fertilizer that comes into contact with the bottom of the swing plate will be spread on the land at a greater distance when it is thrown out, which reduces the occurrence of uneven fertilizer spreading when a large amount of fertilizer is thrown out and spread, resulting in most of the fertilizer being spread on the land at a greater distance. This keeps the fertilizer content of the land within the spreading range stable and improves the efficiency of the device when spreading.

[0016] (3) In this invention, after the swing plate is pushed, it will swing around the positioning block. At the same time, the swing plate will drive the other swing plates to swing synchronously through the connecting ring, so that the swing plate forms a reverse tilt state. At this time, the pull rod is pulled to make the fertilizer inside the placement frame fall down through the reduced area of ​​the feeding trough. Then, when the motor rotates and drives the rotating plate to rotate through the positioning ring, the fertilizer will be spread outward by the swing plate after the swing plate moves downward. This reduces the situation where the fertilizer falls to the ground at close range due to the guidance of the rotating plate when the rotating plate is tilted to spread the fertilizer. This further improves the efficiency of the device when spreading the fertilizer.

[0017] (4) In this invention, when the rotating plate rotates, the fertilizer that falls to its top will be thrown outward by centrifugal force. During the process of the fertilizer being thrown outward, some of the fertilizer will be guided by the convex surface of the convex ring to jump slightly. Then the fertilizer that jumps will be rebounded by the inclined surface of the swing plate and fall downward. The fertilizer that is not affected will continue to be spread to the pasture further away by the swing of the rotating plate. When the swing plate becomes inclined, the fertilizer that jumps will be guided by the inclined swing plate to be spread, which enhances the spreading effect of the device on fertilizer and further improves the quality of fertilizer spreading when planting pasture.

[0018] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall partial cross-sectional structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 4 For the present invention Figure 2 Enlarged view of point B in the middle; Figure 5 This is a partial cross-sectional view of the sliding component of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of point C in the middle; Figure 7 This is a diagram showing the connection relationships of some components of the present invention; Figure 8 This is a partial cross-sectional view of the rotating component of the present invention; Figure 9 This is a partial cross-sectional view of the telescopic component of the present invention; Figure 10 For the present invention Figure 9 Enlarged view of point D in the middle.

[0021] The attached diagram lists the components represented by each number as follows: In the diagram: 1. Main body; 101. Connecting shaft; 102. Moving wheel; 103. Motor; 11. Opening and closing assembly; 111. Placement frame; 112. Feed trough; 113. Moving ring; 114. Pull rod; 12. Sliding assembly; 121. Rotating rod; 122. Connecting rod; 123. Sliding block; 124. Extrusion plate; 2. Rotating mechanism; 21. Rotating assembly; 211. Positioning ring; 212. Rotating plate; 213. Baffle; 214. Protruding ring; 22. Swing assembly; 221. Positioning block; 222. Swing plate; 223. Connecting ring; 3. Lifting mechanism; 31. Telescopic assembly; 311. Push rod; 312. Sliding ring; 313. Spring. Detailed Implementation

[0022] 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.

[0023] Please see Figures 1-10 As shown, the present invention is a high-efficiency fertilization device for forage planting, including a main body 1, a connecting shaft 101 rotatably connected to the bottom of the main body 1, and movable wheels 102 rotatably connected to the left and right sides of the connecting shaft 101, and further including: Rotating mechanism 2 is installed at the bottom of the main body 1 and is used to rotate during operation of the device; Lifting mechanism 3 is installed at the bottom of rotating mechanism 2 and is used to lift and lower the main body 1 when it moves.

[0024] A motor 103 is fixedly connected to the outer surface of the connecting shaft 101, and the main body 1 also includes: The opening and closing component 11 is installed on the top of the main body 1 and is used to store fertilizer; The sliding component 12 is installed at the bottom of the opening and closing component 11 and is used to slide inside the opening and closing component 11.

[0025] Rotating mechanism 2 includes: Rotating assembly 21 is installed at the output end of motor 103 and is used to rotate under the drive of motor 103; The swing assembly 22 is installed inside the rotating assembly 21 and is used to swing when the sliding assembly 12 moves.

[0026] The lifting mechanism 3 includes: Telescopic component 31 is installed at the bottom of rotating component 21 and is used to extend and retract when rotating component 21 moves.

[0027] The opening and closing assembly 11 includes a placement frame 111 fixedly connected to the top of the main body 1, and a plurality of material conveying grooves 112 are provided at the bottom of the placement frame 111; A movable ring 113 is slidably connected to the bottom of the placement frame 111, and a pull rod 114 is fixedly connected to the bottom of the movable ring 113; The end of the pull rod 114 away from the moving ring 113 is rotatably connected to the side wall of the main body 1. When the moving ring 113 moves, it will cause the material conveying trough 112 at the bottom of the placement frame 111 to be open. At this time, the fertilizer inside the placement frame 111 will fall down along the inside of the material conveying trough 112.

[0028] The sliding assembly 12 includes a rotating rod 121 slidably connected to the bottom of the placement frame 111. Several connecting rods 122 are rotatably connected to the side wall of the rotating rod 121. When different standards of fertilizer need to be spread, the operator first rotates the rotating rod 121 located at the bottom of the placement frame 111. When the rotating rod 121 rotates, it will drive the connecting rods 122 to rotate.

[0029] The end of the connecting rod 122 away from the rotating rod 121 is rotatably connected to a sliding block 123, and the bottom of one of the sliding blocks 123 is fixedly connected to a pressing plate 124; Among them, the outer surfaces of several sliding blocks 123 are slidably connected to the inner wall of the feeding trough 112, and the top of the connecting rod 122 is in contact with the bottom of the placement frame 111. When the connecting rod 122 rotates, the distance between the connecting rod 122 and the sliding block 123 becomes shorter, causing the connecting rod 122 to push the sliding block 123 to slide inside the feeding trough 112 when it rotates. When the sliding block 123 slides, it will pull the connecting rod 122 to move and make the top of the connecting rod 122 fit with the feeding trough 112.

[0030] The rotating assembly 21 includes a positioning ring 211 fixedly connected to the output end of the motor 103, and a rotating plate 212 is rotatably connected to the outer surface of the positioning ring 211. A number of baffles 213 are fixedly connected to the top of the rotating plate 212, and a protruding ring 214 is fixedly connected between the baffles 213. The bottom of several protruding rings 214 is fixedly connected to the top of the rotating plate 212. When the rotating plate 212 rotates, the fertilizer that falls to its top will be thrown outward by centrifugal force. During the process of the fertilizer being thrown outward, some of the fertilizer will be guided by the convex surface of the protruding rings 214 to jump slightly.

[0031] The swing assembly 22 includes positioning blocks 221 fixedly connected to the left and right sides of the baffle 213, swing plates 222 rotatably connected to the outer surfaces of two opposing positioning rings 211, and connecting rings 223 fixedly connected to the interior of several swing plates 222. The side wall of the swing plate 222 contacts the bottom of the extrusion plate 124. When the extrusion plate 124 moves, it will contact the swing plate 222 and apply a pushing force to the swing plate 222. After the swing plate 222 is pushed, it will push the baffle 213 through the positioning block 221.

[0032] The telescopic assembly 31 includes a plurality of push rods 311 connected to the bottom of the rotating plate 212. A sliding ring 312 is rotatably connected to one end of the push rods 311 away from the rotating plate 212. A spring 313 is fixedly connected to the top of the sliding ring 312. The inner wall of the sliding ring 312 is slidably connected to the outer surface of the output shaft of the motor 103, and the top of the spring 313 is fixedly connected to the bottom of the rotating plate 212. When the rotating plate 212 swings downward, it will push the sliding ring 312 connected to it to slide downward on the outer surface of the output shaft of the motor 103. When the sliding ring 312 slides downward, it will pull the spring 313 to extend and accumulate potential energy.

[0033] In use, first pour the fertilizer to be spread into the placement frame 111, then start the motor 103. After the motor 103 starts, it will drive the rotating plate 212 to rotate through its output end. After the rotating plate 212 rotates, the operator pulls the lever 114 to rotate the main body 1. When the lever 114 rotates, it will pull the moving ring 113 to move at the bottom of the placement frame 111. When the moving ring 113 moves, it will open the feeding trough 112 at the bottom of the placement frame 111. At this time, the fertilizer located in the placement frame 111... The fertilizer inside the feed trough 112 will fall downwards along the inside of the feed trough 112. When the fertilizer falls, it will come into contact with the top of the rotating plate 212. Since the rotating plate 212 will rotate under the drive of the motor 103, the fertilizer falling on the rotating plate 212 will be thrown outwards by the centrifugal force and the guide of the baffle 213 when the rotating plate 212 rotates. At the same time, the workers will push the main body 1 to drive the moving wheel 102 and the connecting shaft 101 to move, thereby completing the large-area fertilizer spreading work on the pasture.

[0034] When different standards of fertilizer need to be applied, the operator first rotates the rotating rod 121 located at the bottom of the placement frame 111. As the rotating rod 121 rotates, it drives the connecting rod 122 to rotate as well. Because the distance between the connecting rod 122 and the sliding block 123 shortens, the connecting rod 122 pushes the sliding block 123 to slide inside the conveying trough 112. As the sliding block 123 slides, it pulls the connecting rod 122, causing its top to fit against the conveying trough 112, thus reducing the area of ​​fertilizer falling downwards through the conveying trough 112. Then, as the sliding block 123 moves, it drives the extrusion plate 124 to move. When the extrusion plate 124 moves, it contacts the swing plate 222 and applies a pushing force to it. After being pushed, the swing plate 222 moves through the positioning block 22. 1. Pushing the baffle 213, the baffle 213 will push the rotating plate 212 to swing slightly downward on the outer surface of the positioning ring 211. When the rotating plate 212 swings downward, it will push the sliding ring 312 connected to it to slide downward on the outer surface of the output shaft of the motor 103. When the sliding ring 312 slides downward, it will pull the spring 313 to extend and accumulate potential energy. Then, when the motor 103 starts, the rotating plate 212 will rotate in a small-amplitude conical state, so that the fertilizer is spread obliquely downward on the lawn, reducing the fertilizer spreading area. This completes the small-amplitude spreading of a small amount of fertilizer, reducing the situation where the area of ​​fertilizer spreading becomes larger due to the excessive speed of the rotating plate 212 when spreading a small amount of fertilizer in a small area. This makes the fertilizer spreading more uniform and improves the fertilizer spreading quality of the device when planting pasture.

[0035] When the rotating rod 121 is not rotating, thus the conveying trough 112 is not adjusting in size, the swing plate 222 is not pushed by the pressing plate 124, causing the baffle 213 and the rotating plate 212 to swing slightly downwards. Then, when the motor 103 starts, the output end of the motor 103 drives the rotating plate 212 to rotate. At this time, the rotating plate 212 is perpendicular to the output shaft of the motor 103. As the rotating plate 212 rotates, a significant amount of fertilizer is thrown outwards by centrifugal force. During the process of the fertilizer being thrown outwards... Some of the fertilizer will come into contact with the bottom of the swing plate 222. Since the bottom of the swing plate 222 is inclined, some of the fertilizer will bounce onto the land closer to the device after it comes into contact with the inclined surface of the swing plate 222. In addition, the fertilizer that comes into contact with the bottom of the swing plate 222 will be spread on the land at a greater distance when it is thrown out. This reduces the possibility of most of the fertilizer being spread on the land at a greater distance due to uneven fertilizer spreading when a large amount of fertilizer is thrown out and spread. This keeps the fertilizer content of the land within the spreading range stable and improves the efficiency of the device when spreading fertilizer.

[0036] When the rotating rod 121 rotates, it pushes the sliding block 123 to move. The sliding block 123 pulls the connecting rod 122 to move, causing the top of the connecting rod 122 to fit against the bottom of the conveying trough 112, thereby reducing the through area of ​​the conveying trough 112. When the sliding block 123 moves, it drives the bottom pressing plate 124 to move. When the pressing plate 124 moves, its bottom inclined surface applies a pushing force to the swing plate 222 that is in contact with it. After the swing plate 222 receives the pushing force, it swings around the positioning block 221. At the same time, the swing plate 222 drives the other swing plates 222 to swing synchronously through the connecting ring 223, so that... When the swing plate 222 is tilted in the opposite direction, the pull rod 114 is pulled to make the fertilizer inside the placement frame 111 fall downward through the reduced area of ​​the feeding trough 112. Then, when the motor 103 rotates and drives the rotating plate 212 to rotate through the positioning ring 211, the fertilizer will be scattered outward by the downward swing of the rotating plate 212. Some of the fertilizer will be guided outward by the swing plate 222 after the movement, which reduces the situation where the fertilizer falls to the ground nearby due to the guidance of the rotating plate 212 when the rotating plate 212 is tilted to scatter the fertilizer. This further improves the efficiency of the device when scattering fertilizer.

[0037] When the motor 103 drives the positioning ring 211 to rotate through the output end, the positioning ring 211 will drive the rotating plate 212 to rotate. When the rotating plate 212 rotates, the fertilizer that falls to its top will be thrown outward by centrifugal force. During the process of the fertilizer being thrown outward, some fertilizer will be guided by the convex surface of the convex ring 214 to jump slightly. Then, the jumping fertilizer will be rebounded by the inclined surface of the swing plate 222 and fall downward. The fertilizer that is not affected will continue to be spread to the pasture further away by the swing of the rotating plate 212. When the swing plate 222 becomes inclined, the jumping fertilizer is guided by the inclined swing plate 222 to be spread, which enhances the fertilizer spreading effect of the device and further improves the fertilizer spreading quality of the device when planting pasture.

[0038] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A high-efficiency fertilization device for forage planting, comprising a main body (1), wherein a connecting shaft (101) is rotatably connected to the bottom of the main body (1), and movable wheels (102) are rotatably connected to the left and right sides of the connecting shaft (101), characterized in that, Also includes: Rotating mechanism (2), which is installed at the bottom of the main body (1) and is used to rotate during operation of the device; The lifting mechanism (3) is installed at the bottom of the rotating mechanism (2).

2. The high-efficiency fertilization device for forage planting according to claim 1, characterized in that: A motor (103) is fixedly connected to the outer surface of the connecting shaft (101), and the main body (1) also includes: An opening and closing assembly (11) is installed on the top of the main body (1); A sliding component (12) is installed at the bottom of the opening and closing component (11) for sliding inside the opening and closing component (11).

3. The high-efficiency fertilization device for forage planting according to claim 2, characterized in that: The rotating mechanism (2) includes: A rotating assembly (21) is installed at the output end of a motor (103) and is used to rotate under the drive of the motor (103); The swing assembly (22) is installed inside the rotating assembly (21) and is used to swing when the sliding assembly (12) moves.

4. The high-efficiency fertilization device for forage planting according to claim 3, characterized in that: The lifting mechanism (3) includes: Telescopic component (31) is installed at the bottom of rotating component (21) and is used to extend and retract when rotating component (21) moves.

5. The high-efficiency fertilization device for forage planting according to claim 4, characterized in that: The opening and closing component (11) includes a placement frame (111) fixedly connected to the top of the main body (1), and the bottom of the placement frame (111) is provided with a plurality of material conveying grooves (112). The bottom of the placement frame (111) is slidably connected to a movable ring (113), and the bottom of the movable ring (113) is fixedly connected to a pull rod (114). The end of the pull rod (114) away from the moving ring (113) is rotatably connected to the side wall of the main body (1).

6. The high-efficiency fertilization device for forage planting according to claim 5, characterized in that: The sliding assembly (12) includes a rotating rod (121) slidably connected to the bottom of the placement frame (111), and a plurality of connecting rods (122) are rotatably connected to the side wall of the rotating rod (121).

7. The high-efficiency fertilization device for forage planting according to claim 6, characterized in that: The end of the connecting rod (122) away from the rotating rod (121) is rotatably connected to a sliding block (123), and a pressing plate (124) is fixedly connected to the bottom of one of the sliding blocks (123). Among them, the outer surfaces of several sliding blocks (123) are slidably connected to the inner wall of the feeding trough (112), and the top of the connecting rod (122) is attached to the bottom of the placement frame (111).

8. The high-efficiency fertilization device for forage planting according to claim 7, characterized in that: The rotating assembly (21) includes a positioning ring (211) fixedly connected to the output end of the motor (103), and a rotating plate (212) is rotatably connected to the outer surface of the positioning ring (211). The top of the rotating plate (212) is fixedly connected to a plurality of baffles (213), and a protruding ring (214) is fixedly connected between the plurality of baffles (213). The bottom of several of the protruding rings (214) is fixedly connected to the top of the rotating plate (212).

9. The high-efficiency fertilization device for forage planting according to claim 3, characterized in that: The swing assembly (22) includes positioning blocks (221) fixedly connected to the left and right sides of the baffle (213), swing plates (222) rotatably connected to the outer surfaces of two opposing positioning rings (211), and connecting rings (223) fixedly connected to the interior of several swing plates (222). The sidewall of the swing plate (222) is in contact with the bottom of the extrusion plate (124).

10. The high-efficiency fertilization device for forage planting according to claim 4, characterized in that: The telescopic assembly (31) includes a plurality of push rods (311) connected to the bottom of the rotating plate (212). A sliding ring (312) is rotatably connected to one end of the plurality of push rods (311) away from the rotating plate (212). A spring (313) is fixedly connected to the top of the sliding ring (312). The inner wall of the sliding ring (312) is slidably connected to the outer surface of the output shaft of the motor (103), and the top of the spring (313) is fixedly connected to the bottom of the rotating plate (212).

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