Industrial robot capable of carrying out position conversion on machining procedures of machined part

Abstract

The invention provides an industrial robot capable of carrying out position conversion on a machining procedure of a machined part, and relates to the technical field of industrial robots. The device comprises a bottom plate, two conveying belts are fixedly connected to the upper surface of the bottom plate and distributed at the left end and the right end of the bottom plate, an auxiliary device is arranged on the upper surface of the conveying belt at the left end, and a second moving device is fixedly connected to the upper surface of the bottom plate; a first moving device is arranged on the surface of the front side of the second moving device, the first moving device and the second moving device are the same in internal structure, and a clamping device is arranged on the surface of the front side of the first moving device. When the first moving device moves downwards, the clamping device is arranged to move downwards, a sliding groove is inserted into a movable block to drive a chuck to be opened so as to clamp a machined part above the fixing plate, then the first moving device takes away the workpiece, and then the first moving device moves downwards to the fixing block to drive the chuck to be opened so as to loosen the workpiece, the clamping speed is higher, and use is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial robots, in particular to an industrial robot capable of performing position conversion on a processing procedure of a workpiece. Background Art

[0002] Industrial robots are multi-joint manipulators or multi-degree-of-freedom machine devices widely used in industrial fields. Industrial robots can change the position of the processing procedures of the workpieces, have a certain degree of automation, and can rely on their own power and control capabilities to achieve various industrial processing and manufacturing functions. Industrial robots are widely used in various industrial fields such as electronics, logistics, and chemicals.

[0003] However, when traditional industrial robots perform position conversion in the processing procedures of workpieces, the clamping components need to cooperate with multiple motors to clamp the workpiece. However, there is a certain delay in controlling the clamping of the chuck through the coordination between the motors, resulting in reduced efficiency. In addition, setting up the motor clamping component requires debugging the motor on the chuck, which will result in more debugging costs and more maintenance costs in the later stage, increasing expenses. Therefore, an industrial robot that can perform position conversion in the processing procedures of workpieces is proposed. Summary of the invention

[0004] 1. Technical issues to be resolved In view of the deficiencies in the prior art, the present invention provides an industrial robot that can perform position conversion on a workpiece processing procedure, thereby solving the problem of a certain delay in clamping a chuck controlled by cooperation between motors, which results in reduced efficiency.

[0005] (II) Technical solution To achieve the above objectives, the present invention is implemented through the following technical solutions: an industrial robot that can perform position conversion on a workpiece processing procedure, comprising a base plate, a conveyor belt is fixedly connected to the upper surface of the base plate, two conveyor belts are provided and distributed at the left and right ends of the base plate, an auxiliary device is provided on the upper surface of the conveyor belt at the left end, a mobile conversion device is provided on the upper surface of the base plate, a second mobile device is slidably connected to the upper surface of the base plate through the mobile conversion device, a first mobile device is provided on the front side surface of the second mobile device, the first mobile device and the second mobile device have the same internal structure, and a clamping device is provided on the front side surface of the first mobile device.

[0006] Preferably, the first moving device includes a first motor, a moving shell and a first screw rod, a sliding block is provided at the center position of the rear surface of the moving shell, the sliding block is threadedly connected to the inner surface of the second moving device, the first motor is fixedly connected to the right end of the moving shell, the first screw rod is rotatably connected to the inner surface of the moving shell, and the right end of the first screw rod passes through the right end of the moving shell and is fixedly connected to the output end of the first motor.

[0007] Preferably, the clamping device includes a moving block, a slide groove, a chuck, a movable rod, a limit rod, a spring, a limit slider, a roller and a pressure component, the moving block is threadedly connected to the side surface of the first screw rod, the moving block is slidably connected to the inner surface of the moving shell, the slide groove is opened on the inner surface of the moving block, and the pressure component is arranged at both ends of the moving block near the chuck.

[0008] Preferably, the limit rod is fixedly connected to the inner surface of the movable rod, the movable rod is movably connected to the inner surface of the moving block through the limit rod, one end of the spring is fixedly connected to the side surface of the movable rod, and the other end of the spring is fixedly connected to the inner surface of the moving block.

[0009] Preferably, the chuck is fixedly connected to one end of the movable rod, the chuck is slidably connected to the inner surface of the moving block, the limit slider is fixedly connected to the side surface of the movable rod close to the inside, and the roller is rotatably connected to the inner surface of the limit slider.

[0010] Preferably, the pressurizing assembly includes an electric push rod, a sliding frame, a connecting block and a limit bar, the electric push rod is fixedly connected to the left inner surface of the connecting block, the connecting block is fixedly connected to the front surface of the moving block, the sliding frame is slidably connected to the upper inner surface of the connecting block, the rear end of the sliding frame is fixedly connected to the output end of the electric push rod, and the limit bar is fixedly connected to the side surface of the chuck.

[0011] Preferably, the auxiliary device includes a bracket, a rotating rod, a movable block, a supporting block, a fixed plate, a torsion spring, a limiting circular plate and a fixed block, the bracket is fixedly connected to the upper surface of the conveyor belt at the left end, and the rotating rod is rotatably connected to the inner surface of the bracket.

[0012] Preferably, the limiting circular plate is fixedly connected to the side surface of the rotating rod, the limiting circular plate is rotatably connected to the inner surface of the bracket, the torsion spring is sleeved on the side surface of the rotating rod, one end of the torsion spring is fixedly connected to the side surface of the limiting circular plate, the other end of the torsion spring is fixedly connected to the inner surface of the bracket, and the side surface of the movable block is fixedly connected to one end of the rotating rod.

[0013] Preferably, the fixed plate is fixedly connected to the upper surface of the base plate, the support block is fixedly connected to the upper surface of the fixed plate, the lower end of the movable block is in contact with the upper end of the support block, a blocking rod is fixedly connected to the upper surface of the fixed plate, the fixed block is fixedly connected to the upper surface of the conveyor belt at the right end, and a guide strip is fixedly connected to the upper edge surface of the conveyor belt.

[0014] Preferably, the mobile conversion device includes a second motor, a second screw rod, a sliding plate, a first gear and a second gear, the second motor is fixedly connected to the front side surface of the base plate, the second screw rod is rotatably connected to the inner side surface of the base plate, one end of the second screw rod is fixedly connected to the output end of the second motor, the sliding plate is threadedly connected to the side surface of the second screw rod, the sliding plate is slidably connected to the inner side surface of the base plate, the second gear and the first gear are rotatably connected to the upper surface of the sliding plate, the inner side surface of the sliding plate is fixedly connected with a third motor, the output end of the third motor is fixedly connected to the lower side surface of the second gear, the first gear is meshed with the second gear, and the lower end of the second moving device is fixedly connected to the upper surface of the first gear.

[0015] Working principle: the workpiece moves to the fixed plate through the conveyor belt and stops when it touches the blocking rod, and then the second moving device is started to drive the first moving device to move downward, and the downward movement of the first moving device causes the clamping device to move downward, and then the lower part of the slide groove moves to the upper end of the movable block, and the movable block moves from the slide groove to the roller, and the movable rod is pushed outward through the inclined surface at the upper end of the movable block, and the movable rod moves outward to drive the chuck to move outward to cover the workpiece, and then continues to move downward and moves to the inclined surface of the movable block close to the bottom. The spring pulls the movable rod to drive the chuck to clamp the workpiece through the lever principle of the limit rod, and then the second moving device and the first moving device are started, and the first motor drives The first screw rod rotates, and the first screw rod rotates to drive the moving block to move to the right, and at the same time, the second moving device drives the first moving device to move upward. When the moving block moves to the right, the movable block follows the moving block to rotate. When the movable block leaves the moving block, the torsion spring arranged in the bracket drives the rotating rod back to its original position, and the moving block moves to another conveyor belt and then starts the second moving device to drive the first moving device to move downward and drive the clamping device to move downward. Then the clamping device moves to the fixed block, and the inclined surface on the fixed block opens the roller so that the workpiece is placed on the conveyor belt and conveyed away. Then, the clamping device is moved to its original position by the first moving device and the second moving device to continue the operation of the next workpiece.

[0016] (III) Beneficial effects The present invention provides an industrial robot capable of performing position conversion on a workpiece processing procedure. It has the following beneficial effects: 1. When the first moving device moves downward, the clamping device is set to move the slide groove downward to insert the movable block to drive the chuck to open, thereby clamping the workpiece above the fixed plate, and then the workpiece is taken away by the first moving device, and then it moves down to the fixed block to drive the chuck to open to release the workpiece, so that the clamping speed is faster and it is convenient to use.

[0017] 2. The purpose of position exchange is achieved by setting up a second moving device and a first moving device to drive the clamping device to move. A fixed plate is set up to facilitate the workpiece to move upward to provide support for the workpiece. A torsion spring and a rotating rod are set up to rotate when the clamping device is moved out, thereby facilitating the removal of the clamping device.

[0018] 3. When the workpiece is heavy, the chuck is pressurized by the set pressure component to increase the clamping force of the workpiece. A variety of clamping methods are provided to adapt to the clamping of various workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of an industrial robot that can perform position conversion on a workpiece processing procedure proposed by the present invention; Figure 2 This is a rear view of an industrial robot proposed by the present invention that can perform position conversion on a workpiece processing procedure; Figure 3 This is a schematic structural diagram of a first moving device of an industrial robot capable of performing position conversion on a workpiece processing procedure proposed by the present invention; Figure 4 The structure of the gripping device of an industrial robot proposed by the present invention can be used to convert the position of the workpiece processing process Figure 1 ; Figure 5 The structure of the gripping device of an industrial robot proposed by the present invention can be used to convert the position of the workpiece processing process Figure 2 ; Figure 6 The present invention is attached to the specification Figure 5 Enlarged view of middle part B; Figure 7 This is a schematic structural diagram of a pressurizing component of an industrial robot capable of performing position conversion on a workpiece processing procedure proposed by the present invention; Figure 8 The structure of the auxiliary device of the industrial robot proposed by the present invention can be used to convert the position of the workpiece processing process Figure 1 ; Fig. 9 The structure of the auxiliary device of the industrial robot proposed by the present invention can be used to convert the position of the workpiece processing process Figure 2 ; Fig.10The present invention is attached to the specification Figure 1 Enlarged view of part A in the middle; Fig.11 This is a schematic structural diagram of a mobile conversion device of an industrial robot that can perform position conversion on a workpiece processing procedure proposed by the present invention; Fig.12 The present invention is attached to the specification Fig.11 Enlarged view of part C in the middle.

[0020] Among them, 1, bottom plate; 2, conveyor belt; 3, clamping device; 301, moving block; 302, slide groove; 303, clamping head; 304, movable rod; 305, limit rod; 306, spring; 307, limit slider; 308, roller; 309, pressurizing component; 30901, electric push rod; 30902, sliding frame; 30903, connecting block; 30904, limit strip; 4, auxiliary device; 401, bracket; 402 , rotating rod; 403, movable block; 404, supporting block; 405, fixed plate; 406, torsion spring; 407, limiting circular plate; 408, fixed block; 5, first moving device; 501, first motor; 502, moving shell; 503, first screw rod; 6, second moving device; 7, moving conversion device; 701, second motor; 702, second screw rod; 703, sliding plate; 704, first gear; 705, second gear. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] like Figure 1-12 As shown, an embodiment of the present invention provides an industrial robot that can perform position conversion on a workpiece processing procedure, including a base plate 1, a conveyor belt 2 is fixedly connected to the upper surface of the base plate 1, two conveyor belts 2 are provided and distributed at the left and right ends of the base plate 1, an auxiliary device 4 is provided on the upper surface of the conveyor belt 2 at the left end, a mobile conversion device 7 is provided on the upper surface of the base plate 1, a second mobile device 6 is slidably connected to the upper surface of the base plate 1 through the mobile conversion device 7, a first mobile device 5 is provided on the front side surface of the second mobile device 6, the first mobile device 5 and the second mobile device 6 have the same internal structure, and a clamping device 3 is provided on the front side surface of the first mobile device 5.

[0023] The cooperation between the first moving device 5 and the second moving device 6 is programmed and controlled by an external system. The conveyor belt 2 is an existing device, and the length of the conveyor belt 2 can be increased or decreased according to actual needs.

[0024] The first moving device 5 includes a first motor 501, a moving shell 502 and a first screw rod 503. A sliding block is arranged at the central position of the rear surface of the moving shell 502, and the sliding block is threadedly connected to the inner surface of the second moving device 6. The first motor 501 is fixedly connected to the right end of the moving shell 502, and the first screw rod 503 is rotatably connected to the inner surface of the moving shell 502. The right end of the first screw rod 503 passes through the right end of the moving shell 502 and is fixedly connected to the output end of the first motor 501. The second moving device 6 and the first moving device 5 are started, and the first motor 501 drives the first screw rod 503 to rotate. The rotation of the first screw rod 503 drives the moving block 301 to move rightward. At the same time, the second moving device 6 drives the first moving device 5 to move upward. When the moving block 301 moves to the right, the movable block 403 rotates with the moving block 301. When the movable block 403 leaves the moving block 301, the torsion spring 406 arranged in the bracket 401 drives the rotating rod 402 to return to its original position.

[0025] The clamping device 3 includes a moving block 301, a slide groove 302, a clamping head 303, a movable rod 304, a limiting rod 305, a spring 306, a limiting slider 307, a roller 308 and a pressurizing assembly 309. The moving block 301 is threadedly connected to the side surface of the first screw rod 503, the moving block 301 is slidably connected to the inner surface of the moving housing 502, the slide groove 302 is provided on the inner surface of the moving block 301, the limiting rod 305 is fixedly connected to the inner surface of the movable rod 304, and the movable rod 304 is movably connected to the moving housing 502 through the limiting rod 305. The inner surface of the block 301, the pressure assembly 309 is arranged at both ends of the moving block 301 close to the chuck 303, one end of the spring 306 is fixedly connected to the side surface of the movable rod 304, the other end of the spring 306 is fixedly connected to the inner surface of the moving block 301, the chuck 303 is fixedly connected to one end of the movable rod 304, the chuck 303 is slidably connected to the inner surface of the moving block 301, the limit slider 307 is fixedly connected to the side surface of the movable rod 304 close to the inside, and the roller 308 is rotatably connected to the inner surface of the limit slider 307.

[0026] When the moving block 301 moves upward under the control of the first moving device 5 and the second moving device 6, it moves upward obliquely and will not be blocked by the block on the side of the fixed plate 405. An anti-slip pad can also be provided on the chuck 303 to prevent the workpiece from slipping. The chuck 303 can grab workpieces of different sizes within a certain range.

[0027] The pressurizing assembly 309 includes an electric push rod 30901, a sliding frame 30902, a connecting block 30903 and a limit bar 30904. The electric push rod 30901 is fixedly connected to the left inner surface of the connecting block 30903, the connecting block 30903 is fixedly connected to the front surface of the moving block 301, the sliding frame 30902 is slidably connected to the upper inner surface of the connecting block 30903, the rear end of the sliding frame 30902 is fixedly connected to the output end of the electric push rod 30901, and the limit bar 30904 is fixedly connected to the side surface of the chuck 303.

[0028] The auxiliary device 4 includes a bracket 401, a rotating rod 402, a movable block 403, a support block 404, a fixed plate 405, a torsion spring 406, a limiting circular plate 407 and a fixed block 408. The bracket 401 is fixedly connected to the upper surface of the left end conveyor belt 2, the rotating rod 402 is rotatably connected to the inner surface of the bracket 401, the limiting circular plate 407 is fixedly connected to the side surface of the rotating rod 402, the limiting circular plate 407 is rotatably connected to the inner surface of the bracket 401, the torsion spring 406 is sleeved on the side surface of the rotating rod 402, one end of the torsion spring 406 is fixedly connected to the side surface of the limiting circular plate 407, the other end of the torsion spring 406 is fixedly connected to the inner surface of the bracket 401, and the side surface of the movable block 403 is fixedly connected to At one end of the rotating rod 402, the fixed plate 405 is fixedly connected to the upper surface of the bottom plate 1, the support block 404 is fixedly connected to the upper surface of the fixed plate 405, the lower end of the movable block 403 is in contact with the upper end of the support block 404, the upper surface of the fixed plate 405 is fixedly connected with a blocking rod, the fixed block 408 is fixedly connected to the upper surface of the conveyor belt 2 at the right end, and the upper edge surface of the conveyor belt 2 is fixedly connected with a guide strip. When the clamping device 3 is opened by the fixed block 408 and the limit is released, the workpiece is placed on the conveyor belt 2 and is immediately transported away by the conveyor belt 2. The clamping device 3 moves to the fixed block 408, and the inclined surface on the fixed block 408 opens the roller 308 so that the workpiece is placed on the conveyor belt 2 and is transported away.

[0029] The support block 404 supports the movable block 403. The rotating rod 402 passes through the gap between the chucks 303 when the clamping device 3 moves downward and will not block the downward movement of the clamping device 3. After the clamping device 3 moves, the movable block 403 rotates and passes through the clamping device 3. The workpiece moves to the fixed plate 405 through the conveyor belt 2 and stops when it touches the blocking rod. The first moving device 5 moves downward, causing the clamping device 3 to move downward. Then, the lower part of the slide groove 302 moves to the upper end of the movable block 403, and the movable block 403 moves from the slide groove 302 to the roller 308. The movable rod 304 is pushed outward by the inclined surface at the upper end of the movable block 403. The movable rod 304 moves outward, thereby driving the chuck 303 to move outward to cover the workpiece, and then continues to move downward and moves to the inclined surface near the bottom of the movable block 403. The spring 306 pulls the movable rod 304 to drive the chuck 303 to clamp the workpiece through the lever principle of the limit rod 305.

[0030] The mobile conversion device 7 includes a second motor 701, a second screw rod 702, a sliding plate 703, a first gear 704 and a second gear 705. The second motor 701 is fixedly connected to the front side surface of the base plate 1, the second screw rod 702 is rotatably connected to the inner side surface of the base plate 1, one end of the second screw rod 702 is fixedly connected to the output end of the second motor 701, the sliding plate 703 is threadedly connected to the side surface of the second screw rod 702, the sliding plate 703 is slidably connected to the inner side surface of the base plate 1, the second gear 705 and the first gear 704 are rotatably connected to the upper surface of the sliding plate 703, the inner side surface of the sliding plate 703 is fixedly connected with the third motor, the output end of the third motor is fixedly connected to the lower side surface of the second gear 705, the first gear 704 is meshedly connected to the second gear 705, and the lower end of the second mobile device 6 is fixedly connected to the upper surface of the first gear 704.

[0031] Embodiment 2: The difference from Embodiment 1 is that the workpiece can be directly clamped by the pressurizing assembly 309 and the rotation of the second moving device 6 by the mobile conversion device 7 can be suitable for placing the workpiece in multiple positions.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An industrial robot capable of performing position conversion on a workpiece processing step, comprising a base plate (1), characterized in that: A conveyor belt (2) is fixedly connected to the upper surface of the base plate (1). Two conveyor belts (2) are provided and distributed at the left and right ends of the base plate (1). An auxiliary device (4) is provided on the upper surface of the conveyor belt (2) at the left end. A movable conversion device (7) is provided on the upper surface of the base plate (1). A second movable device (6) is slidably connected to the upper surface of the base plate (1) through the movable conversion device (7). A first movable device (5) is provided on the front side surface of the second movable device (6). The first movable device (5) and the second movable device (6) have the same internal structure. A clamping device (3) is provided on the front side surface of the first movable device (5).

2. An industrial robot capable of performing position conversion on a workpiece processing procedure according to claim 1, characterized in that: The first moving device (5) comprises a first motor (501), a moving housing (502) and a first screw rod (503); a sliding block is provided at the central position of the rear surface of the moving housing (502); the sliding block is threadedly connected to the inner surface of the second moving device (6); the first motor (501) is fixedly connected to the right end of the moving housing (502); the first screw rod (503) is rotatably connected to the inner surface of the moving housing (502); the right end of the first screw rod (503) passes through the right end of the moving housing (502) and is fixedly connected to the output end of the first motor (501).

3. The industrial robot capable of performing position conversion on a workpiece processing step according to claim 2, characterized in that: The clamping device (3) comprises a moving block (301), a slide groove (302), a chuck (303), a movable rod (304), a limiting rod (305), a spring (306), a limiting slider (307), a roller (308) and a pressurizing component (309); the moving block (301) is threadedly connected to the side surface of the first screw rod (503); the moving block (301) is slidably connected to the inner surface of the moving housing (502); the slide groove (302) is provided on the inner surface of the moving block (301); and the pressurizing component (309) is arranged at both ends of the moving block (301) close to the chuck (303).

4. The industrial robot capable of performing position conversion on a workpiece processing step according to claim 3, characterized in that: The limiting rod (305) is fixedly connected to the inner surface of the movable rod (304), and the movable rod (304) is movably connected to the inner surface of the moving block (301) through the limiting rod (305). One end of the spring (306) is fixedly connected to the side surface of the movable rod (304), and the other end of the spring (306) is fixedly connected to the inner surface of the moving block (301).

5. The industrial robot capable of performing position conversion on a workpiece processing step according to claim 3, characterized in that: The clamp (303) is fixedly connected to one end of the movable rod (304), the clamp (303) is slidably connected to the inner surface of the moving block (301), the limiting slider (307) is fixedly connected to the inner side surface of the movable rod (304), and the roller (308) is rotatably connected to the inner surface of the limiting slider (307).

6. The industrial robot capable of performing position conversion on a workpiece processing step according to claim 3, characterized in that: The pressurizing component (309) comprises an electric push rod (30901), a sliding frame (30902), a connecting block (30903) and a limiting strip (30904), wherein the electric push rod (30901) is fixedly connected to the left inner surface of the connecting block (30903), the connecting block (30903) is fixedly connected to the front surface of the moving block (301), the sliding frame (30902) is slidably connected to the upper inner surface of the connecting block (30903), the rear end of the sliding frame (30902) is fixedly connected to the output end of the electric push rod (30901), and the limiting strip (30904) is fixedly connected to the side surface of the chuck (303).

7. The industrial robot capable of performing position conversion on a workpiece processing procedure according to claim 1, characterized in that: The auxiliary device (4) comprises a bracket (401), a rotating rod (402), a movable block (403), a supporting block (404), a fixed plate (405), a torsion spring (406), a limiting circular plate (407) and a fixed block (408); the bracket (401) is fixedly connected to the upper surface of the conveyor belt (2) at the left end; and the rotating rod (402) is rotatably connected to the inner surface of the bracket (401).

8. The industrial robot capable of performing position conversion on a workpiece processing procedure according to claim 7, characterized in that: The limiting circular plate (407) is fixedly connected to the side surface of the rotating rod (402), the limiting circular plate (407) is rotatably connected to the inner surface of the bracket (401), the torsion spring (406) is sleeved on the side surface of the rotating rod (402), one end of the torsion spring (406) is fixedly connected to the side surface of the limiting circular plate (407), the other end of the torsion spring (406) is fixedly connected to the inner surface of the bracket (401), and the side surface of the movable block (403) is fixedly connected to one end of the rotating rod (402).

9. The industrial robot capable of performing position conversion on a workpiece processing procedure according to claim 7, characterized in that: The fixed plate (405) is fixedly connected to the upper surface of the bottom plate (1), the support block (404) is fixedly connected to the upper surface of the fixed plate (405), the lower end of the movable block (403) and the upper end of the support block (404) are in contact with each other, a blocking rod is fixedly connected to the upper surface of the fixed plate (405), the fixed block (408) is fixedly connected to the upper surface of the conveyor belt (2) at the right end, and a guide strip is fixedly connected to the upper edge surface of the conveyor belt (2).

10. The industrial robot capable of performing position conversion on a workpiece processing procedure according to claim 1, characterized in that: The mobile conversion device (7) comprises a second motor (701), a second screw rod (702), a sliding plate (703), a first gear (704) and a second gear (705), wherein the second motor (701) is fixedly connected to the front side surface of the base plate (1), the second screw rod (702) is rotatably connected to the inner side surface of the base plate (1), one end of the second screw rod (702) is fixedly connected to the output end of the second motor (701), the sliding plate (703) is threadedly connected to the side surface of the second screw rod (702), and the second gear (705) is fixedly connected to the output end of the second motor (701). The sliding plate (703) is slidably connected to the inner surface of the bottom plate (1); the second gear (705) and the first gear (704) are rotatably connected to the upper surface of the sliding plate (703); a third motor is fixedly connected to the inner surface of the sliding plate (703); the output end of the third motor is fixedly connected to the lower surface of the second gear (705); the first gear (704) is meshedly connected to the second gear (705); and the lower end of the second moving device (6) is fixedly connected to the upper surface of the first gear (704).

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