Electric maintenance mechanism for plastic track

Abstract

This invention relates to the field of plastic running track repair technology, specifically disclosing an electric maintenance mechanism for plastic running tracks, comprising: a telescopic arm mounted on the working unit of a mobile vehicle, the telescopic end of the telescopic arm being fixedly connected to a fixed pipe, and the fixed pipe being fixedly connected to four circumferentially spaced supports; four guide blocks, each fixedly connected to one of the four supports, each guide block being slidably connected to a sliding member, the sliding member being fixedly connected to a fixed block, and two adjacent fixed blocks being slidably connected to a folding cutter, the adjacent folding cutters being in contact with each other; and a push rod embedded in the supports, the telescopic end of the push rod being fixedly connected to a connecting plate. The four relatively slidable folding cutters form a rectangular cutting frame, which can automatically adjust the cutting size according to the damaged area, and the telescopic arm drives the cutter to make downward circumferential cuts, ensuring a flat cut surface and thus improving the repair quality.

Description

Technical Field

[0001] This invention relates to the field of plastic running track repair technology, and more specifically, to an electric maintenance mechanism for plastic running tracks. Background Technology

[0002] Synthetic running tracks, also known as all-weather athletic tracks, have excellent flatness, which helps athletes fully utilize their speed and technique, thereby effectively improving athletic performance and reducing the risk of falls and injuries. However, after a period of use, the surface of synthetic running tracks may be damaged due to oxidation or pressure, thus requiring timely repair.

[0003] Current repair methods require manual circumferential cutting of the damaged area of ​​the synthetic running track, carefully trimming away the broken sections that have separated from the concrete surface while ensuring the cut edges are as smooth as possible. However, manual cutting not only demands high physical strength and skill from the operator, resulting in significant labor intensity, but also often makes it difficult to maintain a consistently smooth cut surface during the process, thus affecting the subsequent repair results.

[0004] 2. When cutting the damaged area of ​​the plastic running track, some parts still had residual adhesive adhering to the concrete surface, requiring workers to forcefully tear them apart during the separation process. This tearing operation is not only physically demanding and inefficient, but also generates a lot of dust during the separation process, which adversely affects the health of the construction workers, and the dust can also affect subsequent repairs.

[0005] In view of this, we propose an electric maintenance mechanism for plastic running tracks. Summary of the Invention

[0006] (a) Technical problems to be solved To address the problems existing in the prior art, the present invention provides an electric maintenance mechanism for plastic running tracks to solve the technical problems mentioned in the background art.

[0007] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: an electric maintenance mechanism for a plastic running track, comprising: a telescopic arm, wherein the telescopic arm is mounted on the working unit of a mobile vehicle, and a fixed pipe is fixedly connected to the telescopic end of the telescopic arm, and four circumferentially spaced brackets are fixedly connected to the fixed pipe. Four guide blocks are provided, and the four guide blocks are respectively fixed to the four brackets. Each guide block is slidably connected to a sliding member, and the sliding member is fixedly connected to a fixed block. Two adjacent fixed blocks are slidably connected to a folded cutter, and the adjacent folded cutters are in contact with each other. Push rod one is embedded in the bracket, and a connecting plate is fixedly connected to the telescopic end of push rod one. The connecting plate is fixedly connected to the adjacent sliding member. A dust removal mechanism is installed in the middle of the fixed pipe, which cleans the dust from the ground in the area to be repaired. A separation mechanism, installed on a fixed pipe, separates the cut-off waste plastic track from the ground.

[0008] Furthermore, the middle of the folded cutter is curved, and the upper side of the folded cutter is provided with a protrusion that slides and connects with the fixing block. The four folded cutters fit together to form a rectangle and their lower sides are flush.

[0009] Furthermore, the ash removal mechanism includes: The air duct is fixedly connected to the middle of the fixed tube; The nozzle is fixedly connected to and communicates with the lower end of the fixed tube. The nozzle is provided with multiple air outlets, and the lower side of the nozzle is flush with the lower side of the folding cutter.

[0010] Furthermore, the separation mechanism includes: There are two push rods, which are respectively fixed to the two brackets. Both push rods are fixed to a support ring, and the support ring is rotatably connected to a connecting ring. A guide member is slidably connected to the air duct. The guide member has two through slots. A sliding arm and a slider are slidably connected in the through slots of the guide member. An elastic element is fixedly connected between the slider and the adjacent sliding arm. Two hinge rods are provided, and the two hinge rods are respectively hinged between the connecting ring and the slider.

[0011] Furthermore, each of the two brackets is fixedly connected to a push rod three, and the telescopic ends of the two push rod three are jointly fixedly connected to a support plate. The support plate is rotatably connected to a crossbeam, and the crossbeam is provided with two grooves. The hinge rod slides within the grooves of the crossbeam.

[0012] Furthermore, the sliding arm is slidably connected to a sliding rod, and a guide shoe is fixedly connected to the upper end of the sliding rod. The guide shoe is slidably connected to the crossbeam.

[0013] Furthermore, a fixing rod is fixedly connected to the lower end of the sliding rod, a separation plate is hinged to the fixing rod, and a torsion spring is fixedly connected between the separation plate and the sliding rod.

[0014] Furthermore, the two separation plates are arranged in a figure-eight pattern, and an arc-shaped spring is fixed to the lower end of each separation plate.

[0015] Furthermore, a limiting block is fixed to one side of the sliding rod, and the limiting block limits the separation plate.

[0016] Furthermore, the connecting ring is fixedly connected to a gear ring, the bracket on one side is fixedly connected to a motor, the output shaft of the motor is fixedly connected to a gear, and the gear meshes with the gear ring.

[0017] (III) Beneficial Effects Compared with the prior art, the present invention provides an electric maintenance mechanism for plastic running tracks, which has the following beneficial effects: 1. This invention uses four relatively sliding folding cutters to form a rectangular cutting frame, which can automatically adjust the cutting size according to the damaged area, and drive the cutters downward to make a circular cut through the telescopic arm to ensure a flat cutting surface, thereby improving the repair quality and avoiding the problems of high labor intensity and unevenness of manual cutting.

[0018] 2. This invention uses a dust removal mechanism to spray high-pressure air into the cutting area, which not only removes dust but also blows high-pressure air between the plastic track and the concrete surface, causing them to lift up and initially separate, creating favorable conditions for subsequent automated separation.

[0019] 3. This invention utilizes the coordinated action of push rod two, push rod three, a motor, and elastic components to automatically insert the separation plate into the adhesion point between the plastic layer and the ground, and moves circumferentially along the cut under the drive of the motor. Under the continuous elastic force applied by the elastic component, the separation plate automatically separates the plastic track from the concrete ground along the adhesion point, replacing the traditional manual tearing method, reducing physical exertion, and simultaneously cleaning the dust at the repair location. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an electric maintenance mechanism for a plastic running track according to the present invention; Figure 2 This is a schematic diagram of the structure of the bracket and folding cutter and other parts in this invention; Figure 3 This is a structural schematic diagram of the fixing block and the folding cutter, etc., in this invention; Figure 4 This is a side view of the fixing block and the folding cutter in this invention. Figure 5 This is a schematic diagram of the air guide tube and nozzle in this invention; Figure 6 This is a cross-sectional view of the support ring and connecting ring in this invention; Figure 7 This is a cross-sectional view of the guide component in this invention. Figure 8 This is a cross-sectional view of the sliding arm in this invention. Figure 9 This is a schematic diagram of the separation plate and the arc-shaped spring sheet in this invention.

[0021] In the diagram: 1. Telescopic arm; 2. Fixed tube; 3. Bracket; 4. Guide block; 5. Sliding component; 6. Fixed block; 7. Folding cutter; 8. Push rod one; 9. Connecting plate; 10. Air duct; 11. Nozzle; 12. Push rod two; 13. Support ring; 14. Connecting ring; 15. Guide component; 16. Sliding arm; 17. Slider; 18. Elastic component; 19. Hinge rod; 20. Push rod three; 21. Support plate; 22. Crossbeam; 23. Sliding rod; 24. Guide shoe; 25. Fixed rod; 26. Separation plate; 27. Torsion spring; 28. Arc-shaped spring; 29. ​​Limiting block; 30. Gear ring; 31. Motor; 32. Gear. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0024] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0025] This invention provides an electric maintenance mechanism for plastic running tracks, such as... Figures 1-4 As shown, it includes: telescopic arm 1, fixed tube 2, bracket 3, guide block 4, sliding part 5, fixed block 6, folding cutter 7, push rod 8, connecting plate 9, ash removal mechanism and separation mechanism; Telescopic arm 1 is installed on the working unit of the mobile vehicle. The telescopic end of the telescopic arm 1 is fixedly connected to a fixed pipe 2, and the fixed pipe 2 is fixedly connected to four circumferentially spaced brackets 3. Four guide blocks 4 are provided, and the four guide blocks 4 are respectively fixedly connected to the four brackets 3. The guide blocks 4 are slidably connected to sliding parts 5, and the sliding parts 5 are fixedly connected to fixed blocks 6. Two adjacent fixed blocks 6 are slidably connected to a folding cutter 7, and the adjacent folding cutters 7 are in close contact with each other. Push rod 8 is embedded in the bracket 3, and the telescopic end of push rod 8 is fixedly connected to a connecting plate 9, which is fixedly connected to the adjacent sliding parts 5. The dust removal mechanism is set in the middle of the fixed pipe 2, and the dust removal mechanism cleans the dust on the ground in the area to be repaired. The separation mechanism is set in the fixed pipe 2, and the separation mechanism separates the cut waste plastic track from the ground. The middle of the folding cutter 7 is curved, and the upper side of the folding cutter 7 is provided with a protrusion that is slidably connected to the fixed block 6. The four folding cutters 7 are arranged in a rectangle and the lower side is flush.

[0026] Install the telescopic arm 1 onto the working unit of the mobile vehicle. By controlling the mobile vehicle, move the four folding cutters 7 to the designated positions. Adjust the positions of the four folding cutters 7 according to the damaged area of ​​the plastic track. The specific adjustment steps are as follows: Activate the four push rods 8. The telescopic ends of the push rods 8 drive the sliding parts 5 to slide along the guide block 4 through the connecting plate 9. The sliding parts 5 drive the fixed blocks 6 to move synchronously. During the movement, the folding cutter 7 slides along the two adjacent fixed blocks 6. At the same time, the folding cutters 7 that are in contact slide relative to each other, thereby changing the area enclosed by the four folding cutters 7. This allows for the cutting of plastic running tracks with different damaged areas. The area enclosed by the four folding cutters 7 must be larger than the damaged area of ​​the plastic running track.

[0027] Then, control the telescopic arm 1. The telescopic end of the telescopic arm 1 drives the four folding cutters 7 to move downward through the fixed pipe 2 and the bracket 3. The folding cutters 7 perform a ring cut on the damaged plastic track until the folding cutters 7 contact the concrete ground. Then, the dust in the four folding cutters 7 is cleaned by the dust removal mechanism, and the circumferentially cut plastic track is separated from the concrete ground by the separation mechanism.

[0028] like Figure 2 and Figure 5 As shown, the ash removal mechanism includes: an air guide pipe 10 and a nozzle 11; The air guide tube 10 is fixed to the middle of the fixed tube 2; the nozzle 11 is fixed to and connected to the lower end of the fixed tube 2, the nozzle 11 is provided with multiple air outlets, and the lower side of the nozzle 11 is flush with the lower side of the folding cutter 7.

[0029] When in use, connect the air guide pipe 10 to the high-pressure air pump. After the damaged plastic track is cut in a ring, start the high-pressure air pump. The high-pressure gas flows along the air guide pipe 10 and is ejected from the nozzle 11 at the lower end. The ejected high-pressure air cleans the dust in the four folded cutters 7, thereby reducing the impact of dust on the subsequent repair of the plastic track. Under the blowing of the high-pressure air, the air is blown into the space between the damaged plastic track and the concrete ground, causing the damaged plastic track to lift up and separate from the concrete ground.

[0030] like Figures 5-9 As shown, the separation mechanism includes: push rod 2 12, support ring 13, connecting ring 14, guide member 15, sliding arm 16, slider 17, elastic member 18, hinge rod 19, push rod 3 20, support plate 21, crossbeam 22, sliding rod 23, guide shoe 24, fixed rod 25, separation plate 26, torsion spring 27, arc-shaped spring 28, limit block 29, toothed ring 30, motor 31 and gear 32; Two push rods 12 are provided, each fixedly connected to one of the two brackets 3. Both push rods 12 are fixedly connected to a support ring 13, which is rotatably connected to a connecting ring 14. A guide 15 is slidably connected to an air duct 10. The guide 15 has two through slots, within which a sliding arm 16 and a slider 17 are slidably connected. An elastic element 18 is fixedly connected between the slider 17 and the adjacent sliding arm 16. Two hinge rods 19 are provided, each hinged between the connecting ring 14 and the slider 17. Push rods 20 are fixedly connected to both brackets 3. The telescopic ends of both push rods 20 are fixedly connected to a support plate 21. The support plate 21 is rotatably connected to a crossbeam 22, which has two crossbeams. The groove and hinge rod 19 slide within the groove of the crossbeam 22; the sliding arm 16 is slidably connected to the sliding rod 23, the upper end of the sliding rod 23 is fixedly connected to the guide shoe 24, and the guide shoe 24 is slidably connected to the crossbeam 22; the lower end of the sliding rod 23 is fixedly connected to the fixing rod 25, the fixing rod 25 is hinged to the separation plate 26, and the separation plate 26 and the sliding rod 23 are fixedly connected to the torsion spring 27; the two separation plates 26 are arranged in a V-shape, and the lower end of the separation plate 26 is fixedly connected to the arc-shaped spring piece 28; a limit block 29 is fixedly connected to one side of the sliding rod 23, and the limit block 29 limits the separation plate 26; the connecting ring 14 is fixedly connected to the toothed ring 30, and the bracket 3 on one side is fixedly connected to the motor 31, the output shaft of the motor 31 is fixedly connected to the gear 32, and the gear 32 and the toothed ring 30 mesh.

[0031] When push rod 20 is activated, its telescopic end moves the crossbeam 22 downward via support plate 21. The crossbeam 22 then moves the sliding rod 23 downward via guide shoe 24. The sliding rod 23 slides downward along sliding arm 16, and the arc-shaped spring piece 28 contacts the concrete surface. As the sliding rod 23 moves downward, the arc-shaped spring piece 28 slides outward along the concrete surface, and the separation plate 26 rotates along fixed rod 25. The torsion spring 27 is tightened until the lower end of the sliding rod 23 contacts the concrete surface, and the limiting block 29 limits the separation plate 26, making the separation plate 26 and the sliding rod 23 at a 90° angle.

[0032] After completing the above operations, push rod 12 is activated. The telescopic end of push rod 12 drives the support ring 13 and connecting ring 14 to move downward. The connecting ring 14 drives the slider 17 to slide along the through groove of the guide member 15 through the hinge rod 19. The slider 17 drives the sliding arm 16 to slide through the elastic member 18. The sliding arm 16 drives the sliding rod 23 to move until the separation plate 26 is inserted into the bonding area between the plastic track and the concrete. Then, as the slider 17 moves, the sliding arm 16 stops moving, and the elastic member 18 is stretched and stores force.

[0033] The motor 31 is started, and its output shaft drives the gear ring 30 to rotate via the gear 32. The gear ring 30 drives the connecting ring 14 to rotate circumferentially. During the circumferential rotation of the connecting ring 14, the separating plate 26 moves along the adhesion point between the plastic track and the concrete surface. The movement of the separating plate 26 separates the concrete track from the concrete surface. As the separating plate 26 moves circumferentially, under the elastic force of the elastic element 18, the separating plate 26 is pressed against the adhesion point between the plastic track and the concrete surface until the arc-shaped spring piece 28 at the end of the separating plate 26 contacts the folded cutter 7, thus completing the separation of the cut plastic track from the concrete surface. Then, the telescopic ends of push rod 22 and push rod 30 are controlled to reset, causing the sliding rod 23 to move upward along the sliding arm 16 to reset. Under the elastic force of the torsion spring 27, the separating plate 26 rotates along the fixed rod 25 and resets. Then, the telescopic arm 1 is controlled to reset, and the cut plastic track is manually removed for repair.

[0034] Working principle of the invention: In use, the telescopic arm 1 is installed on the working unit of the mobile vehicle, and then the push rod 8 is activated. The telescopic end of the push rod 8 drives the sliding member 5 to slide along the guide block 4 through the connecting plate 9. The sliding member 5 drives the folding cutter 7 to move through the fixed block 6. The folding cutter 7 slides along the fixed block 6, changing the area surrounded by the four folding cutters 7.

[0035] The telescopic arm 1 controls the telescopic end to drive the fixed tube 2 and its parts to move downward. The fixed tube 2, through the bracket 3 and guide block 4, causes the folding cutter 7 to move downward to perform a ring cut on the plastic track until the folding cutter 7 contacts the ground of the ground, and then the telescopic arm 1 is closed.

[0036] When the folding cutter 7 comes into contact with the concrete surface, the nozzle 11 also comes into contact with the concrete surface at the same time. Then, high-pressure air is pumped into the air guide tube 10. The high-pressure air is ejected from the nozzle 11. The ejected high-pressure air cleans the dust between the four folding cutters 7 and blows the high-pressure air between the plastic track and the concrete surface, causing the damaged plastic track to lift up and separate from the concrete surface.

[0037] Then, push rod 20 is activated. The telescopic end of push rod 20 drives the crossbeam 22 to move downward through the support plate 21. The crossbeam 22 drives the sliding rod 23 to slide downward along the sliding arm 16 through the guide shoe 24. The sliding rod 23 drives the separation plate 26 to move downward. The arc-shaped spring piece 28 at the end of the separation plate 26 contacts the concrete ground. When the sliding rod 23 moves downward, the arc-shaped spring piece 28 moves along the concrete ground. The arc-shaped spring piece 28 reduces the friction between the separation plate 26 and the concrete. When the sliding rod 23 contacts the concrete ground, the separation plate 26 and the sliding rod 23 are at a 90° angle. At the same time, the limiting block 29 limits the separation plate 26, and the separation plate 26 also contacts the concrete ground.

[0038] Then, push rod 12 is activated. The telescopic end of push rod 12 drives the support ring 13 and connecting ring 14 to move downward. The connecting ring 14 drives the slider 17 to slide along the through groove of the guide member 15 through the hinge rod 19. The slider 17 pulls the elastic member 18, and the elastic member 18 pulls the sliding arm 16 to slide along the guide member 15 until the separation plate 26 is inserted into the bonding area between the plastic track and the concrete surface. As the slider 17 moves, the elastic member 18 is stretched and stores force, so that the separation plate 26 is aligned with the bonding area between the plastic track and the concrete surface. The motor 31 is activated. The output shaft of the motor 31 drives the gear ring 30 to rotate through the gear 32. The gear ring 30 drives the connecting ring 14 to rotate along the support ring 13. At the same time, the crossbeam 22 rotates along the support plate 21, thereby causing the two separation plates 26 to rotate circumferentially along the bonding area between the plastic track and the concrete surface, so that the separation plate 26 separates the plastic track from the concrete surface.

[0039] Once the separating plate 26 comes into contact with the folding cutter 7, stop pumping high-pressure air into the air guide tube 10 and turn off the motor 31. The circumferentially cut plastic track separates from the concrete ground. Then, control the push rod 3 20 and push rod 2 12 to reset, causing the sliding rod 23 to move upward and reset. At the same time, the sliding arm 16 and the slider 17 reset, and the separating plate 26 separates from the concrete ground and resets. Then, control the telescopic arm 1 to move upward and reset, causing the folding cutter 7 and the nozzle 11 to move upward and reset. Finally, remove the circumferentially cut plastic track and repair the area.

[0040] In all the solutions mentioned above, for connections between two components, welding, bolt and nut connection, bolt or screw connection, or other known connection methods can be selected according to the actual situation. These will not be elaborated here. For all fixed connections mentioned above, welding is preferred. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. An electric maintenance mechanism for a plastic running track, characterized in that, include: Telescopic arm (1), the telescopic arm (1) is installed on the working unit of the mobile vehicle, the telescopic end of the telescopic arm (1) is fixedly connected to a fixed pipe (2), and the fixed pipe (2) is fixedly connected to four circumferentially spaced brackets (3). Four guide blocks (4) are provided. The four guide blocks (4) are respectively fixed to the four brackets (3). The guide blocks (4) are slidably connected to the sliders (5). The sliders (5) are fixedly connected to the fixing blocks (6). Two adjacent fixing blocks (6) are slidably connected to a folded cutter (7). The adjacent folded cutters (7) are in contact with each other. Push rod 1 (8) is embedded in the bracket (3). The telescopic end of push rod 1 (8) is fixedly connected to a connecting plate (9). The connecting plate (9) is fixedly connected to the adjacent sliding member (5). The dust removal mechanism is located in the middle of the fixed pipe (2) and cleans the dust on the ground in the area to be repaired. A separation mechanism is installed on the fixed pipe (2), which separates the cut-off waste plastic track from the ground.

2. The electric maintenance mechanism for a plastic running track according to claim 1, characterized in that, The middle part of the folded cutter (7) is curved, and the upper side of the folded cutter (7) is provided with a protrusion that is slidably connected to the fixing block (6). The four folded cutters (7) are fitted together to form a rectangle and their lower sides are flush.

3. The electric maintenance mechanism for a plastic running track according to claim 1, characterized in that, The ash removal mechanism includes: The air duct (10) is fixed to the middle of the fixed tube (2); The nozzle (11) is fixed and connected to the lower end of the fixed tube (2). The nozzle (11) is provided with multiple air outlets. The lower side of the nozzle (11) is flush with the lower side of the folded cutter (7).

4. The electric maintenance mechanism for a plastic running track according to claim 3, characterized in that, The separation mechanism includes: There are two push rods (12), and the two push rods (12) are respectively fixed to the two brackets (3). The two push rods (12) are fixed to a support ring (13), and the support ring (13) is rotatably connected to a connecting ring (14). The guide (15) is slidably connected to the air pipe (10). The guide (15) is provided with two through slots. A sliding arm (16) and a slider (17) are slidably connected in the through slots of the guide (15). An elastic element (18) is fixed between the slider (17) and the adjacent sliding arm (16). Two hinge rods (19) are provided, and the two hinge rods (19) are respectively hinged between the connecting ring (14) and the slider (17).

5. The electric maintenance mechanism for a plastic running track according to claim 4, characterized in that, Push rods (20) are fixedly connected to both brackets (3). The telescopic ends of the two push rods (20) are fixedly connected to a support plate (21). The support plate (21) is rotatably connected to a crossbeam (22). The crossbeam (22) is provided with two grooves. The hinge rod (19) slides in the grooves of the crossbeam (22).

6. The electric maintenance mechanism for a plastic running track according to claim 5, characterized in that, The sliding arm (16) is slidably connected to a sliding rod (23), and a guide shoe (24) is fixedly connected to the upper end of the sliding rod (23). The guide shoe (24) is slidably connected to the crossbeam (22).

7. The electric maintenance mechanism for a plastic running track according to claim 6, characterized in that, The lower end of the sliding rod (23) is fixedly connected to a fixing rod (25), the fixing rod (25) is hinged to a separation plate (26), and a torsion spring (27) is fixedly connected between the separation plate (26) and the sliding rod (23).

8. The electric maintenance mechanism for a plastic running track according to claim 7, characterized in that, The two separation plates (26) are arranged in a figure-eight pattern, and an arc-shaped spring piece (28) is fixed to the lower end of the separation plate (26).

9. The electric maintenance mechanism for a plastic running track according to claim 8, characterized in that, A limiting block (29) is fixed to one side of the sliding rod (23), and the limiting block (29) limits the separation plate (26).

10. The electric maintenance mechanism for a plastic running track according to claim 4, characterized in that, The connecting ring (14) is fixedly connected to a gear ring (30), and the bracket (3) on one side is fixedly connected to a motor (31). The output shaft of the motor (31) is fixedly connected to a gear (32), and the gear (32) meshes with the gear ring (30).

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