Low-energy-consumption slideway for carrying rice dumplings

Abstract

The low-energy-consumption slide way comprises supporting legs and further comprises an extrusion assembly, a communication assembly, a driving assembly and an auxiliary limiting assembly, the tops of the supporting legs are fixedly connected with a transportation slide way, the top in the transportation slide way is provided with a transportation roller, and the left side and the right side of the top of the transportation slide way are fixedly connected with protection plates. According to the device, after transportation work is completed, an electromagnetic block power source is switched off, at the moment, the magnetic attraction force of the electromagnetic block and a third magnetic block is reduced, the electromagnetic block cannot effectively attract the third magnetic block, under the action of gravity, a lifting sliding block moves downwards in a lifting sliding groove, a top wall pulley on the lifting sliding block cannot support a limiting rotating plate, and the lifting sliding block can move downwards; and after the storage frames are separated from the bottom plate, the elasticity of the springs is recovered, negative pressure in the first pressure cylinders absorbs air in the second pressure cylinders back into the first pressure cylinders again through the connecting pipes, and the device can conduct auxiliary carrying work on the next storage frame again.

Description

Technical Field

[0001] The invention relates to the technical field of rice dumpling production equipment, in particular to a low-energy consumption slideway for transporting rice dumplings. Background Art

[0002] Zongzi, a food made from glutinous rice wrapped in bamboo leaves and steamed, is one of China's traditional festival foods. The main ingredients are glutinous rice and fillings, wrapped in reed leaves (or holly leaves, ramie leaves, etc.). It has various shapes, mainly pointed and square.

[0003] When the rice dumplings are produced, they need to be uniformly placed in a storage frame and then moved. However, when the existing device moves them, the weight of the rice dumplings on both sides of the storage frame is different, resulting in a deviation in the center of gravity. During the subsequent transportation, the lighter side is easily biased toward the heavier side during movement, causing the storage frame to easily tip over, thereby reducing the efficiency during transportation. Improvements need to be made to this problem. Summary of the invention

[0004] The object of the present invention is to provide a low-energy consumption slide for transporting rice dumplings to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above-mentioned technical problems, the present invention provides the following technical solutions: a low-energy consumption slide for transporting rice dumplings, comprising supporting feet, and also comprising an extrusion assembly, a connecting assembly, a driving assembly and an auxiliary limiting assembly. The top of the supporting feet is fixedly connected to a transport slide, and a transport roller is arranged on the top of the transport slide. Protective plates are fixedly connected to the left and right sides of the top of the transport slide.

[0006] Wherein, the extrusion assembly comprises: A fixed block is fixedly connected to the bottom inner side of the transport slideway, a pressure cylinder is fixedly connected to the top of the fixed block, a slide rod is slidably connected to the middle of the top of the pressure cylinder, a piston disk is fixedly connected to the bottom of the slide rod, a connecting block is fixedly connected to the top of the pressure cylinder, a connecting frame is rotatably connected inside the connecting block, a bottom plate is fixedly connected to the top of the connecting frame, and a connecting pipe is fixedly connected to the bottom of the pressure cylinder.

[0007] According to the above technical solution, the connecting component includes a pressure cylinder 2, a slide rod 2, a piston disk 2, a lifting plate and a magnetic block 1. The pressure cylinder 2 is fixedly connected to the left and right sides of the transport slide, the slide rod 2 is slidably connected to the middle of the top of the pressure cylinder 2, the piston disk 2 is fixedly connected to the bottom of the slide rod 2, the lifting plate is fixedly connected to the top of the slide rod 2, and the magnetic block 1 is fixedly connected to the top of the lifting plate.

[0008] According to the above technical scheme, the driving assembly includes a lifting slide, a lifting slider, a second magnetic block, a driving frame, a driving plate, a top wall pulley, a third magnetic block, an electromagnetic block and a positioning rotating frame. The lifting slide is fixedly connected to the inner side of the protective plate, the lifting slider is slidably connected to the inside of the lifting slide, the second magnetic block is embedded in the bottom of the lifting slider, the driving frame is fixedly connected to the side of the lifting slider away from the protective plate, the driving plate is rotatably connected to the middle part of the driving frame, the top wall pulley is rotatably connected to the side of the driving plate away from the driving frame, the third magnetic block is fixedly connected to the side of the lifting slider close to the protective plate, the electromagnetic block is fixedly connected to the top of the lifting slide close to the protective plate, and the positioning rotating frame is fixedly connected to the inner side of the protective plate and is located above the lifting slide.

[0009] According to the above technical solution, the auxiliary limiting assembly includes a limiting rotating plate, an auxiliary frame 1, an auxiliary pulley 1, an auxiliary frame 2 and an auxiliary pulley 2, the limiting rotating plate is rotatably connected to the inner middle part of the positioning rotating frame, the auxiliary frame 1 is fixedly connected to the bottom of the limiting rotating plate on the side close to the protective plate, the auxiliary pulley 1 is rotatably connected to the inner middle part of the auxiliary frame 1, the auxiliary frame 2 is fixedly connected to the bottom of the limiting rotating plate on the side away from the protective plate, and the auxiliary pulley 2 is rotatably connected to the inner middle part of the auxiliary frame 2.

[0010] According to the above technical solution, a spring is fixedly connected to the inner bottom of the pressure cylinder, and the top of the spring is fixedly connected to the bottom of the piston disc.

[0011] According to the above technical solution, the end of the connecting tube away from the first pressure cylinder is fixedly connected to the bottom of the second pressure cylinder, and the bottom air in the connecting tube is connected to the bottom air in the second pressure cylinder through the connecting tube.

[0012] According to the above technical solution, the top magnetic surface of the first magnetic block repels the bottom magnetic surface of the second magnetic block, and the outer side of the top wall pulley is slidably connected to the side of the limit rotating plate close to the protective plate.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: after the rice dumplings are uniformly placed in the storage frame, the storage frame is moved to the top of the transport roller. At this time, the bottom of the storage frame contacts the bottom plate. If the weight difference between the two sides of the storage frame is not large, the two sides of the storage frame contact the auxiliary pulley 2 on the auxiliary frame 2 outside the limit rotating plate, and then the storage frame is pushed to move on the top of the transport roller. The storage frame can be guided by the auxiliary pulley 2, and the storage frame can be assisted to move when the auxiliary pulley 2 rotates, thereby reducing the resistance of the storage frame when it moves, making the device more labor-saving when moving the storage frame, and reducing the working energy consumption of the transport slideway; When one side of the storage frame is heavier than the other side, the storage frame squeezes one side of the bottom plate when it contacts the bottom plate, causing the bottom plate to drop instantly. At the same time, when the bottom plate drops, it pushes the slide bar 1 and the piston plate 1 to move in the pressure cylinder 1, causing the pressure in the pressure cylinder 1 to increase suddenly, and the suddenly increased pressure in the pressure cylinder 1 is transmitted to the pressure cylinder 2 through the connecting pipe, causing the bottom pressure in the pressure cylinder 2 to increase and push the piston plate 2, causing the piston plate 2 to push the slide bar 2 and the lifting plate to rise, causing the lifting plate to move into the lifting slot. Since the magnetic block 1 on the top of the lifting plate and the magnetic block 2 at the bottom of the lifting slider magnetically repel each other, after the lifting plate rises, the magnetic block 1 pushes the lifting slider on the magnetic block 2, causing the lifting slider to rise in the lifting slot. At this time, the electromagnetic block is controlled to work. When the lifting slider moves to be flush with the electromagnetic block, the electromagnetic block adsorbs the magnetic block 3 on the rear side of the lifting slider, causing the lifting slider to rise. The slider is fixed to the lifting slide groove by the magnetic block three and the electromagnetic block to keep it at the electromagnetic block. At the same time, when the lifting slider rises, the driving frame on the lifting slider moves up synchronously, so that the driving frame pushes the driving plate, so that the top wall pulley on the driving plate squeezes the limit rotating plate, so that the limit rotating plate rotates in the positioning rotating frame, and the limit rotating plate rotates to be parallel to the positioning rotating frame. At this time, the limit rotating plate is located at the top of both sides of the storage frame, and the storage frame is pushed to the top of the transport roller, so that the auxiliary pulley on the auxiliary frame one at the lower side of the limit rotating plate is in contact with the top of the storage frame. When the storage frame is moved, the bottom of the auxiliary pulley one contacts the top of the storage frame, which can limit the top of the storage frame to prevent the storage frame from tipping over in the moving water. At the same time, the auxiliary pulley one contacts the top of the storage frame. When the storage frame moves, the auxiliary pulley one assists the storage frame in moving, thereby reducing the energy consumption when the transport slide works. After the transportation work is completed, the power supply of the electromagnetic block is disconnected. At this time, the magnetic adsorption force between the electromagnetic block and the magnetic block three is reduced, so that the electromagnetic block cannot effectively adsorb the magnetic block three. Under the action of gravity, the lifting slider moves down in the lifting slide groove, so that the top wall pulley on the lifting slider cannot support the limit turn plate, and the limit turn plate is reset to both sides of the top of the transport roller. After the storage frame is separated from the bottom plate, the elasticity of the spring is restored, so that the negative pressure in the pressure cylinder one absorbs the air in the pressure cylinder two back into the pressure cylinder one through the connecting pipe, so that the device can assist in the transportation of the next storage frame again. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the connecting pipe of the present invention; Figure 3 It is a schematic diagram of an explosion of a piston disc of the present invention; Figure 4 It is a schematic diagram of two explosions of the piston disc of the present invention; Figure 5 It is a schematic diagram of an explosion at a fixed block of the present invention; Figure 6 It is a schematic diagram of the position limiting rotating plate of the present invention; Figure 7 It is a schematic diagram of the auxiliary frame of the present invention; Figure 8 It is a schematic diagram of two explosions of the magnetic block of the present invention.

[0015] In the figure: 1, support foot; 2, transport slide; 3, transport roller; 4, extrusion assembly; 401, fixed block; 402, pressure cylinder 1; 403, slide bar 1; 404, piston disc 1; 405, connecting block; 406, connecting frame; 407, bottom plate; 408, connecting pipe; 5, connecting assembly; 501, pressure cylinder 2; 502, slide bar 2; 503, piston disc 2; 504, lifting plate; 505, magnetic block 1; 6 , driving assembly; 601, lifting slide; 602, lifting slider; 603, magnetic block 2; 604, driving frame; 605, driving plate; 606, top wall pulley; 607, magnetic block 3; 608, electromagnetic block; 609, positioning rotating frame; 7, auxiliary limiting assembly; 701, limiting rotating plate; 702, auxiliary frame 1; 703, auxiliary pulley 1; 704, auxiliary frame 2; 705, auxiliary pulley 2; 8, protective plate. DETAILED DESCRIPTION

[0016] 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.

[0017] See also Figure 1-3 The present invention provides a technical solution: a low-energy consumption slide for transporting rice dumplings, comprising a supporting foot 1, and also comprising an extrusion component 4, a connecting component 5, a driving component 6 and an auxiliary limiting component 7. The top of the supporting foot 1 is fixedly connected to a transport slide 2, and a transport roller 3 is arranged on the top of the transport slide 2. Protective plates 8 are fixedly connected to the left and right sides of the top of the transport slide 2.

[0018] Wherein, the extrusion assembly 4 comprises: The fixed block 401 is fixedly connected to the inner bottom of the transport slide 2, the top of the fixed block 401 is fixedly connected to a pressure cylinder 402, the middle of the top of the pressure cylinder 402 is slidably connected to a slide rod 403, the bottom of the slide rod 403 is fixedly connected to a piston plate 404, the top of the pressure cylinder 402 is fixedly connected to a connecting block 405, the connecting block 405 is rotatably connected to a connecting frame 406, the top of the connecting frame 406 is fixedly connected to a bottom plate 407, and the bottom of the pressure cylinder 402 is fixedly connected to a connecting pipe 408.

[0019] See also Figure 1-8 The present invention provides a technical solution: the connecting component 5 includes a pressure cylinder 2 501, a slide rod 2 502, a piston disc 2 503, a lifting plate 504 and a magnetic block 1 505. The pressure cylinder 2 501 is fixedly connected to the left and right sides of the transport slide 2, the slide rod 2 502 is slidably connected to the middle of the top of the pressure cylinder 2 501, the piston disc 2 503 is fixedly connected to the bottom of the slide rod 2 502, the lifting plate 504 is fixedly connected to the top of the slide rod 2 502, and the magnetic block 1 505 is fixedly connected to the top of the lifting plate 504.

[0020] The driving assembly 6 includes a lifting slide 601, a lifting slider 602, a second magnetic block 603, a driving frame 604, a driving plate 605, a top wall pulley 606, a third magnetic block 607, an electromagnetic block 608 and a positioning rotating frame 609. The lifting slide 601 is fixedly connected to the inner side of the protective plate 8, the lifting slider 602 is slidably connected inside the lifting slide 601, the second magnetic block 603 is embedded in the bottom of the lifting slider 602, the driving frame 604 is fixedly connected to the side of the lifting slider 602 away from the protective plate 8, the driving plate 605 is rotatably connected to the middle part of the driving frame 604, the top wall pulley 606 is rotatably connected to the side of the driving plate 605 away from the driving frame 604, the third magnetic block 607 is fixedly connected to the side of the lifting slider 602 close to the protective plate 8, the electromagnetic block 608 is fixedly connected to the top of the lifting slide 601 close to the protective plate 8, and the positioning rotating frame 609 is fixedly connected to the inner side of the protective plate 8 and is located above the lifting slide 601.

[0021] The auxiliary limiting assembly 7 includes a limiting rotating plate 701, an auxiliary frame 1 702, an auxiliary pulley 1 703, an auxiliary frame 2 704 and an auxiliary pulley 2 705. The limiting rotating plate 701 is rotatably connected to the middle part of the positioning rotating frame 609, the auxiliary frame 1 702 is fixedly connected to the bottom of the limiting rotating plate 701 on the side close to the protective plate 8, the auxiliary pulley 1 703 is rotatably connected to the middle part of the auxiliary frame 1 702, the auxiliary frame 2 704 is fixedly connected to the bottom of the limiting rotating plate 701 on the side away from the protective plate 8, and the auxiliary pulley 2 705 is rotatably connected to the middle part of the auxiliary frame 2 704.

[0022] A spring is fixedly connected to the bottom of the pressure cylinder 402, and the top of the spring is fixedly connected to the bottom of the piston plate 404.

[0023] One end of the connecting tube 408 away from the pressure cylinder 1 402 is fixedly connected to the bottom of the pressure cylinder 2 501 , and the bottom air in the connecting tube 408 is connected to the bottom air in the pressure cylinder 2 501 through the connecting tube 408 .

[0024] The top of the first magnetic block 505 repels the bottom magnetic surface of the second magnetic block 603, and the outer side of the top wall pulley 606 is slidably connected to the side of the limit rotating plate 701 close to the protective plate 8.

[0025] After the rice dumplings are uniformly placed in the storage frame, the storage frame is moved to the top of the transport roller 3. At this time, the bottom of the storage frame contacts the bottom plate 407. If the weight difference between the two sides of the storage frame is not much, the two sides of the storage frame contact the auxiliary pulley 2 705 on the auxiliary frame 2 704 outside the limit rotating plate 701. Then the storage frame is pushed to move on the top of the transport roller 3. The storage frame can be guided by the auxiliary pulley 2 705. At the same time, the storage frame can be assisted to move when the auxiliary pulley 2 705 rotates, thereby reducing the resistance of the storage frame when it moves, making the device more labor-saving when moving the storage frame, and reducing the working energy consumption of the transport slide 2.

[0026] When one side of the storage frame is heavier than the other side, the storage frame squeezes one side of the bottom plate 407 when it contacts the bottom plate 407, causing the bottom plate 407 to drop instantly. At the same time, when the bottom plate 407 drops, the slide bar 1 403 and the piston plate 1 404 are pushed to move in the pressure cylinder 1 402, causing the pressure in the pressure cylinder 1 402 to increase suddenly. The suddenly increased pressure in the pressure cylinder 1 402 is transmitted to the pressure cylinder 2 501 through the connecting pipe 408, causing the bottom pressure in the pressure cylinder 2 501 to increase, and pushing the piston plate 2 503, causing the piston plate 2 503 to increase. Push the slide bar 2 502 and the lifting plate 504 to rise, so that the lifting plate 504 moves into the lifting slot 601. Since the magnetic block 1 505 on the top of the lifting plate 504 and the magnetic block 2 603 at the bottom of the lifting slider 602 repel each other, after the lifting plate 504 rises, the magnetic block 1 505 pushes the lifting slider 602 on the magnetic block 2 603, so that the lifting slider 602 rises in the lifting slot 601. At this time, the electromagnetic block 608 is controlled to work. When the lifting slider 602 moves to be flush with the electromagnetic block 608, the electromagnetic block 608 pushes the rear side of the lifting slider 602. The magnetic block 3 607 is adsorbed, so that the lifting slider 602 is fixed to the lifting slide 601 through the magnetic block 3 607 and the electromagnetic block 608, so that it is kept at the electromagnetic block 608. At the same time, when the lifting slider 602 rises, the driving frame 604 on the lifting slider 602 moves up synchronously, so that the driving frame 604 pushes the driving plate 605, so that the top wall pulley 606 on the driving plate 605 squeezes the limit rotating plate 701, so that the limit rotating plate 701 rotates in the positioning rotating frame 609, and the limit rotating plate 701 rotates to be parallel to the positioning rotating frame 609. At this time, the limiting rotating plate 701 is located at the top of both sides of the storage frame, pushing the storage frame to the top of the transport roller 3, so that the auxiliary pulley 703 on the auxiliary frame 702 at the lower side of the limiting rotating plate 701 fits the top of the storage frame. When the storage frame is moved, the bottom of the auxiliary pulley 703 contacts the top of the storage frame, which can limit the top of the storage frame to prevent the storage frame from tipping over when moving. At the same time, the auxiliary pulley 703 contacts the top of the storage frame. When the storage frame moves, the auxiliary pulley 703 assists the movement of the storage frame to reduce the energy consumption of the transport slide 2 when it is working.

[0027] After the transportation work is completed, the power supply of the electromagnetic block 608 is disconnected. At this time, the magnetic adsorption force between the electromagnetic block 608 and the magnetic block three 607 is reduced, so that the electromagnetic block 608 cannot effectively adsorb the magnetic block three 607, and under the action of gravity, the lifting slider 602 moves downward in the lifting slide groove 601, so that the top wall pulley 606 on the lifting slider 602 cannot support the limit turn plate 701, so that the limit turn plate 701 is reset to both sides of the top of the transport roller 3. After the storage frame is separated from the bottom plate 407, the elasticity of the spring is restored, so that the negative pressure in the pressure cylinder 1 402 absorbs the air in the pressure cylinder 2 501 back into the pressure cylinder 1 402 through the connecting pipe 408, so that the device can assist in the transportation of the next storage frame again.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A low-energy consumption slide for transporting rice dumplings, comprising a support leg (1), characterized in that: It also includes an extrusion component (4), a connection component (5), a drive component (6) and an auxiliary limit component (7); the top of the support foot (1) is fixedly connected to a transport slide (2); the top of the transport slide (2) is provided with a transport roller (3); and the left and right sides of the top of the transport slide (2) are fixedly connected to protective plates (8); Wherein, the extrusion assembly (4) comprises: A fixed block (401) is fixedly connected to the bottom of the inner side of the transport slideway (2); a pressure cylinder (402) is fixedly connected to the top of the fixed block (401); a slide rod (403) is slidably connected to the middle of the top of the pressure cylinder (402); a piston plate (404) is fixedly connected to the bottom of the slide rod (403); a connecting block (405) is fixedly connected to the top of the pressure cylinder (402); a connecting frame (406) is rotatably connected inside the connecting block (405); a bottom plate (407) is fixedly connected to the top of the connecting frame (406); and a connecting pipe (408) is fixedly connected to the bottom of the pressure cylinder (402).

2. The low-energy consumption slide for transporting rice dumplings according to claim 1, characterized in that: The connecting component (5) comprises a second pressure cylinder (501), a second slide rod (502), a second piston disc (503), a lifting plate (504) and a first magnetic block (505); the second pressure cylinder (501) is fixedly connected to the left and right sides of the transport slideway (2); the second slide rod (502) is slidably connected to the middle of the top of the second pressure cylinder (501); the second piston disc (503) is fixedly connected to the bottom of the second slide rod (502); the lifting plate (504) is fixedly connected to the top of the second slide rod (502); and the first magnetic block (505) is fixedly connected to the top of the lifting plate (504).

3. The low-energy consumption slide for transporting rice dumplings according to claim 2, characterized in that: The driving assembly (6) comprises a lifting slide (601), a lifting slider (602), a second magnetic block (603), a driving frame (604), a driving plate (605), a top wall pulley (606), a third magnetic block (607), an electromagnetic block (608) and a positioning rotating frame (609); the lifting slide (601) is fixedly connected to the inner side of the protective plate (8); the lifting slider (602) is slidably connected to the inside of the lifting slide (601); the second magnetic block (603) is embedded in the bottom of the lifting slider (602); the driving frame (604) is fixedly connected to the lifting slider (602) is away from the side of the protective plate (8), the driving plate (605) is rotatably connected to the middle part of the driving frame (604), the top wall pulley (606) is rotatably connected to the side of the driving plate (605) away from the driving frame (604), the magnetic block three (607) is fixedly connected to the side of the lifting slider (602) close to the protective plate (8), the electromagnetic block (608) is fixedly connected to the top of the lifting slot (601) close to the side of the protective plate (8), and the positioning rotating frame (609) is fixedly connected to the inner side of the protective plate (8) and is located above the lifting slot (601).

4. The low-energy consumption slide for transporting rice dumplings according to claim 3, characterized in that: The auxiliary limiting assembly (7) comprises a limiting rotating plate (701), an auxiliary frame 1 (702), an auxiliary pulley 1 (703), an auxiliary frame 2 (704) and an auxiliary pulley 2 (705); the limiting rotating plate (701) is rotatably connected to the middle part of the positioning rotating frame (609); the auxiliary frame 1 (702) is fixedly connected to the bottom of the limiting rotating plate (701) on a side close to the protective plate (8); the auxiliary pulley 1 (703) is rotatably connected to the middle part of the auxiliary frame 1 (702); the auxiliary frame 2 (704) is fixedly connected to the bottom of the limiting rotating plate (701) on a side away from the protective plate (8); and the auxiliary pulley 2 (705) is rotatably connected to the middle part of the auxiliary frame 2 (704).

5. The low-energy consumption slide for transporting rice dumplings according to claim 4, characterized in that: A spring is fixedly connected to the bottom of the pressure cylinder 1 (402), and the top of the spring is fixedly connected to the bottom of the piston disc 1 (404).

6. The low-energy consumption slide for transporting rice dumplings according to claim 5, characterized in that: The end of the connecting tube (408) away from the first pressure cylinder (402) is fixedly connected to the bottom of the second pressure cylinder (501), and the bottom air in the connecting tube (408) is connected to the bottom air in the second pressure cylinder (501) through the connecting tube (408).

7. The low energy consumption slide for transporting rice dumplings according to claim 6, characterized in that: The top of the first magnetic block (505) and the bottom magnetic surface of the second magnetic block (603) repel each other, and the outer side of the top wall pulley (606) is slidably connected to the side of the limit rotating plate (701) close to the protective plate (8).

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