Laser cutting device for PVC leather processing

Abstract

The invention provides a PVC leather processing laser cutting device, and relates to the technical field of laser cutting, the PVC leather processing laser cutting device comprises an equipment mechanism, a translation mechanism is mounted on the equipment mechanism, a pressing mechanism is mounted on the equipment mechanism, and a discharging mechanism is mounted on the pressing mechanism; the equipment mechanism comprises an equipment shell, a door plate is rotatably mounted above the equipment shell, a fixed base is fixedly connected to the lower surface of the equipment shell, a machining table is fixedly connected to the upper surface of the equipment shell, and a front baffle is fixedly connected to the front surface of the equipment shell. According to the purposes, the double-shaft motor can further drive the driving lead screw to rotate, the driving lead screw rotates to drive the sliding metal plate to horizontally move along the driving lead screw, the L-shaped pressing plate can be driven to descend through transmission of the transmission connecting rod in cooperation with the transmission push rod, the L-shaped pressing plate can tightly press the two sides of the cutting portion of the PVC artificial leather, and positioning of the PVC artificial leather is achieved; and subsequent laser cutting is assisted, and the phenomenon of material stacking is prevented.

Description

Technical Field

[0001] This invention relates to the field of laser cutting technology, and more particularly to a laser cutting device for processing PVC leather. Background Technology

[0002] PVC leather, also known as polyvinyl chloride artificial leather, is made by coating fabric with PVC resin, plasticizers, stabilizers, and other additives to form a paste, or by laminating it with a layer of PVC film, and then processing it through a certain process. Due to its high strength, ease of processing, and low cost, it can be used to make various bags, seat covers, linings, and other items.

[0003] Currently, in existing technologies, after PVC artificial leather is produced, it needs to be cut into the required shape according to the application scenario and with the help of laser cutting. When cutting unprocessed PVC artificial leather, because the texture of PVC artificial leather is relatively soft, the cutting part needs to be pressed tightly. If the PVC artificial leather is not pressed and positioned, it will cause the PVC artificial leather to pile up during the laser cutting process. Therefore, this invention proposes a laser cutting device for PVC leather processing. Summary of the Invention

[0004] The purpose of this invention is to solve the problem in the prior art that when cutting unprocessed PVC artificial leather, the cut part needs to be pressed due to the soft texture of PVC artificial leather. If the PVC artificial leather is not pressed and positioned, it will cause the PVC artificial leather to pile up during the laser cutting process.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a laser cutting device for PVC leather processing, comprising an equipment mechanism, a translation mechanism mounted on the equipment mechanism, a pressing mechanism mounted on the equipment mechanism, and a feeding mechanism mounted on the pressing mechanism; the equipment mechanism includes an equipment shell, a door panel rotatably mounted on the top of the equipment shell, a fixed base fixedly connected to the lower surface of the equipment shell, a processing table fixedly connected to the upper surface of the equipment shell, and a front baffle fixedly connected to the front surface of the equipment shell; the translation mechanism includes two side slide rails, the two side slide rails being fixedly connected to the inner wall of the equipment shell, and an electric slide table slidably mounted on the two side slide rails.

[0006] In at least some embodiments, the electric slide table has a slide groove, a slider is slidably installed in the slide groove, a mounting plate is fixedly connected to one side of the slider, and a laser cutting head is fixedly connected to one side of the mounting plate.

[0007] In at least some embodiments, the clamping mechanism includes a connecting seat, which is fixed to the front surface of the fixed base. Side connecting brackets are rotatably mounted on both ends of the connecting seat. An L-shaped bracket is fixed to the upper end of each of the two side connecting brackets. An upper mounting groove is provided at one end of the lower surface of the L-shaped bracket.

[0008] In at least some embodiments, a fixed base is fixedly connected to the other end of the upper surface of the L-shaped bracket, a dual-axis motor is fixedly connected to one side of the fixed base, and a bevel gear set is fixedly connected to the output shaft of one end of the dual-axis motor.

[0009] In at least some embodiments, a threaded rod is meshed with one side of the bevel gear set, the threaded rod is located on one side of the L-shaped bracket and rotatably mounted on the upper surface of the side connecting bracket, and a limit groove is formed at the upper end of the side connecting bracket.

[0010] In at least some embodiments, a limiting block is slidably installed in the limiting groove, one end of the limiting block is engaged with a threaded rod, and the other end of the limiting block is fixedly connected to a clamping plate, which is located above the processing table.

[0011] In at least some embodiments, the feeding mechanism includes a drive screw, one end of which is fixedly connected to one output shaft of a dual-axis motor. A sliding sheet metal is meshed on the drive screw, the sliding sheet metal is located above an L-shaped bracket, and a rotating component is fixedly connected to the lower outer wall of the sliding sheet metal. A transmission connecting rod is rotatably mounted on the rotating component.

[0012] In at least some embodiments, an L-shaped pressure plate is provided below the L-shaped bracket, one end of the transmission connecting rod is rotatably mounted on the L-shaped pressure plate, a lower mounting groove is provided on the upper surface of the L-shaped pressure plate, a lower mounting rod is fixedly connected to the inner wall of the lower mounting groove, a transmission push rod is rotatably mounted on the lower mounting rod, an upper mounting rod is rotatably mounted on the upper end of the transmission push rod, and the upper mounting rod is fixedly connected to the inner wall of the upper mounting groove.

[0013] In at least some embodiments, a drive motor is fixedly connected to one side of the inner wall of the L-shaped pressure plate, and an adjusting screw is fixedly connected to the output shaft of the drive motor. A fixed side plate is rotatably mounted on one end of the adjusting screw, and the fixed side plate is fixedly connected to the outer wall of the L-shaped pressure plate. A meshing toothed plate is also provided on one side of the adjusting screw, and the meshing toothed plate is fixedly connected between the fixed side plate and the inner side wall of the L-shaped pressure plate.

[0014] In at least some embodiments, the adjusting screw is meshed with a mounting sheet metal, the lower end of the mounting sheet metal is rotatably mounted with a rotating shaft, one end of the rotating shaft is fixedly connected to a driven gear, the driven gear is meshed with a meshing gear plate, and the other end of the rotating shaft has a plurality of evenly distributed rubber protrusions fixedly connected to its outer side wall.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are as follows: 1. In this invention, pushing the side connecting bracket and the L-shaped bracket can drive them to rotate around the connecting seat. Then the L-shaped bracket will move to the top of the processing table and start the dual-axis motor to drive the threaded rod to rotate through the transmission of the bevel gear set. The threaded rod can drive the pressing plate and the limiting block to rise and fall along the limiting groove, and cooperate with the pressing plate to press the PVC artificial leather onto the processing table.

[0016] 2. In this invention, the dual-axis motor can also drive the drive screw to rotate. The rotation of the drive screw can drive the sliding sheet metal to move horizontally along it. Through the transmission of the transmission link and in conjunction with the transmission push rod, the L-shaped pressure plate can be driven to descend. The L-shaped pressure plate can press the two sides of the PVC artificial leather cutting part to achieve the positioning of the PVC artificial leather, assist in the subsequent laser cutting, and prevent the phenomenon of material accumulation.

[0017] 3. In this invention, after laser cutting is completed, starting the drive motor will drive the mounting sheet metal to move horizontally along the adjusting screw. The driven gear at the lower end of the mounting sheet metal meshes with the meshing gear plate to drive the rotating shaft to rotate. The waste material after laser cutting can be transported through the rubber protrusion at one end of the rotating shaft, saving manual labor and improving the working efficiency of the laser cutting device. Attached Figure Description

[0018] Figure 1 This invention provides a schematic perspective view of the overall structure of a laser cutting device for PVC leather processing. Figure 2 This invention provides a schematic perspective view of the transmission mechanism in a laser cutting device for PVC leather processing. Figure 3 This invention provides a schematic perspective view of the structure of the inner clamping ring and the hollow rotating ring in a laser cutting device for PVC leather processing; Figure 4 This invention provides a schematic perspective view of the terminal support ring and drive structure in a laser cutting device for PVC leather processing. Figure 5 This invention provides a three-dimensional schematic diagram of the positioning structure A in a laser cutting device for PVC leather processing; Figure 6 This invention provides a schematic perspective view of the positioning structure B in a laser cutting device for PVC leather processing. Figure 7 This invention provides a schematic three-dimensional view of the flue gas purification mechanism in a laser cutting device for PVC leather processing; Figure 8 This invention presents a schematic three-dimensional view of the flue gas purification mechanism in a laser cutting device for PVC leather processing.

[0019] Legend: 100, Equipment mechanism; 200, Translation mechanism; 300, Clamping mechanism; 400, Unloading mechanism; 101, Equipment shell; 102, Door panel; 103, Processing table; 104, Fixed base; 105, Front baffle; 201, Side slide rail; 202, Electric slide table; 203, Slide groove; 204, Slider; 205, Mounting plate; 206, Laser cutting head; 301, Connecting seat; 302, Side connecting bracket; 303, L-shaped bracket; 304, Upper mounting groove; 305, Limiting groove; 306, Fixed seat; 307, Double... 308. Shaft motor; 309. Bevel gear set; 310. Limit block; 311. Threaded rod; 312. Pressure plate; 403. Drive screw; 404. Sliding sheet metal; 405. L-shaped pressure plate; 406. Transmission push rod; 407. Upper mounting rod; 408. Lower mounting groove; 409. Fixed side plate; 400. Rotating component; 410. Transmission connecting rod; 411. Lower mounting rod; 412. Meshing gear plate; 413. Driven gear; 414. Adjusting screw; 415. Drive motor; 416. Mounting sheet metal; 417. Rotating shaft; 418. Rubber protrusion block. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0021] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0022] In existing technologies, after PVC artificial leather is produced, it needs to be cut into the required shape according to the application scenario and with the help of laser cutting. The PVC artificial leather is laid flat on the worktable of the laser cutting machine. When laser cutting unprocessed PVC artificial leather, because the texture of PVC artificial leather is relatively soft, the cutting part needs to be pressed tightly. If the PVC artificial leather is not pressed and positioned, the laser column of the laser cutting will pull the PVC artificial leather to move horizontally, which will lead to the phenomenon of PVC artificial leather piling up during the laser cutting process.

[0023] Therefore, the present invention aims at least in the following ways: the door panel 102 can rotate around the equipment housing 101, thereby laying the PVC artificial leather flat on the processing table 103. Activating the electric slide table 202 allows it to move along the side slide rail 201 in the X-axis direction. Simultaneously, the electric slide table 202 can drive the slider 204 to move along the slide groove 203 in the Y-axis direction. Laser cutting of the PVC artificial leather is achieved through the laser cutting head 206. Pushing the side connecting bracket 302 and the L-shaped bracket 303 causes them to rotate around the connecting seat 301. The L-shaped bracket 303 then moves above the processing table 103, and the dual-axis motor 307 drives the pressing plate 311 and the limiting block 309 to rise and fall along the limiting groove 305, cooperating with the pressing plate 311. The PVC artificial leather can be pressed onto the processing table 103. The dual-axis motor 307 can also drive the L-shaped pressure plate 403 to descend. The L-shaped pressure plate 403 can press the two sides of the PVC artificial leather cutting part to achieve positioning of the PVC artificial leather, assist in subsequent laser cutting, and prevent material accumulation. After laser cutting is completed, the drive motor 414 can be started to drive the mounting sheet metal 415 to move horizontally along the adjusting screw 413. The driven gear 412 and the meshing tooth plate 411 at the lower end of the mounting sheet metal 415 can mesh to drive the rotating shaft 416 to rotate. The rubber protrusion 417 at one end of the rotating shaft 416 can be used to transport the waste material after laser cutting, saving manual labor and improving the working efficiency of the laser cutting device.

[0024] Example, according to Figures 1-8 This invention provides a laser cutting device for processing PVC leather, comprising a device mechanism 100, a translation mechanism 200 mounted on the device mechanism 100, a pressing mechanism 300 mounted on the device mechanism 100, and a feeding mechanism 400 mounted on the pressing mechanism 300; as shown. Figure 2 As shown, the equipment mechanism 100 includes an equipment housing 101, a door panel 102 rotatably mounted on the top of the equipment housing 101, a fixed base 104 fixedly connected to the lower surface of the equipment housing 101, a processing table 103 fixedly connected to the upper surface of the equipment housing 101, and a front baffle 105 fixedly connected to the front surface of the equipment housing 101; the translation mechanism 200 includes two side slide rails 201, the two side slide rails 201 are fixedly connected to the inner wall of the equipment housing 101, and an electric slide table 202 is slidably mounted on the two side slide rails 201.

[0025] like Figure 3As shown, the electric slide table 202 has a slide groove 203, and a slider 204 is slidably installed in the slide groove 203. A mounting plate 205 is fixed to one side of the slider 204, and a laser cutting head 206 is fixed to one side of the mounting plate 205. The door panel 102 can rotate around the equipment shell 101, thereby laying the PVC artificial leather flat on the processing table 103. Activating the electric slide table 202 can drive it to move along the side slide rail 201 in the X-axis direction. At the same time, the electric slide table 202 can also drive the slider 204 to move along the slide groove 203 in the Y-axis direction. The laser cutting head 206 is used to laser cut the PVC artificial leather.

[0026] like Figure 5 As shown, the clamping mechanism 300 includes a connecting seat 301, which is fixedly connected to the front surface of the fixed base 104. Side connecting brackets 302 are rotatably mounted on both ends of the connecting seat 301. L-shaped brackets 303 are fixedly connected to the upper ends of both side connecting brackets 302. An upper mounting groove 304 is formed at one end of the lower surface of each L-shaped bracket 303, and a fixed seat 306 is fixedly connected to the other end of the upper surface of the L-shaped bracket 303. A dual-axis motor 307 is fixedly connected to one side of the fixed seat 306. A bevel gear set 308 is fixedly connected to the output shaft of one end of the dual-axis motor 307. A threaded rod 310 is meshed with one side of the bevel gear set 308. The threaded rod 310 is located on one side of the L-shaped bracket 303 and rotatably mounted on the upper surface of the side connecting brackets 302. A limiting groove 305 is provided at the upper end of 302. A limiting block 309 is slidably installed in the limiting groove 305. One end of the limiting block 309 is engaged with the threaded rod 310. The other end of the limiting block 309 is fixedly connected to a pressing plate 311. The pressing plate 311 is located above the processing table 103. Pushing the side connecting bracket 302 and the L-shaped bracket 303 will cause them to rotate around the connecting seat 301. Then the L-shaped bracket 303 will move above the processing table 103 and start the dual-axis motor 307 to drive the threaded rod 310 to rotate through the transmission of the bevel gear set 308. The threaded rod 310 can drive the pressing plate 311 and the limiting block 309 to rise and fall along the limiting groove 305. Together with the pressing plate 311, the PVC artificial leather can be pressed onto the processing table 103.

[0027] like Figures 6-7As shown, the feeding mechanism 400 includes a drive screw 401, one end of which is fixedly connected to one output shaft of a dual-axis motor 307. A sliding sheet metal 402 is meshed on the drive screw 401. The sliding sheet metal 402 is located above an L-shaped bracket 303. A rotating component 408 is fixedly connected to the lower outer wall of the sliding sheet metal 402. A transmission connecting rod 409 is rotatably mounted on the rotating component 408. An L-shaped pressure plate 403 is provided below the L-shaped bracket 303. One end of the transmission connecting rod 409 is rotatably mounted on the L-shaped pressure plate 403. A lower mounting groove 406 is formed on the upper surface of the L-shaped pressure plate 403. A component is fixedly connected to the inner wall of the lower mounting groove 406. A lower mounting rod 410 is rotatably mounted on which a transmission push rod 404 is rotatably mounted. An upper mounting rod 405 is rotatably mounted on the upper end of the transmission push rod 404. The upper mounting rod 405 is fixed to the inner wall of the upper mounting groove 304. At the same time, the dual-axis motor 307 can also drive the drive screw 401 to rotate. The rotation of the drive screw 401 can drive the sliding sheet metal 402 to move horizontally along it. Through the transmission of the transmission connecting rod 409 and in cooperation with the transmission push rod 404, the L-shaped pressure plate 403 can be driven to descend. The L-shaped pressure plate 403 can press the two sides of the PVC artificial leather cutting part to achieve the positioning of the PVC artificial leather, assist in subsequent laser cutting, and prevent material accumulation.

[0028] like Figure 8 As shown, a drive motor 414 is fixedly connected to one side of the inner wall of the L-shaped pressure plate 403. An adjusting screw 413 is fixedly connected to the output shaft of the drive motor 414. A fixed side plate 407 is rotatably mounted on one end of the adjusting screw 413. The fixed side plate 407 is fixedly connected to the outer wall of the L-shaped pressure plate 403. A meshing toothed plate 411 is also provided on one side of the adjusting screw 413. The meshing toothed plate 411 is fixed between the fixed side plate 407 and the inner wall of the L-shaped pressure plate 403. A mounting sheet metal 415 is meshed onto the adjusting screw 413. A rotating shaft 416 is rotatably mounted on the lower end of the mounting sheet metal 415. One end of the rotating shaft 416 is fixedly connected to... A driven gear 412 is engaged with a meshing toothed plate 411. Several evenly distributed rubber protrusions 417 are fixed to the outer wall of the other end of the rotating shaft 416. After laser cutting is completed, starting the drive motor 414 will drive the mounting sheet metal 415 to move horizontally along the adjusting screw 413. The driven gear 412 and the meshing toothed plate 411 at the lower end of the mounting sheet metal 415 will engage to drive the rotating shaft 416 to rotate. The rubber protrusions 417 at one end of the rotating shaft 416 can be used to transport the waste material after laser cutting, saving manual labor and improving the working efficiency of the laser cutting device.

[0029] The working principle of this invention is as follows: The door panel 102 can rotate around the equipment housing 101, thereby laying the PVC artificial leather flat on the processing table 103. The electric slide 202 is activated, causing it to move along the side slide rail 201 in the X-axis direction. Simultaneously, the electric slide 202 can also drive the slider 204 to move along the slide groove 203 in the Y-axis direction. The laser cutting head 206 performs laser cutting on the PVC artificial leather. Pushing the side connecting bracket 302 and the L-shaped bracket 303 causes them to rotate around the connecting seat 301. The L-shaped bracket 303 then moves above the processing table 103. The dual-axis motor 307, driven by the bevel gear set 308, drives the threaded rod 310 to rotate. The threaded rod 310 drives the pressing plate 311 and the limiting block 309 to rise and fall along the limiting groove 305. Together with the pressing plate 311, the PVC artificial leather is pressed firmly onto the processing table 103. 3. Simultaneously, the dual-axis motor 307 can also drive the drive screw 401 to rotate. The rotation of the drive screw 401 can drive the sliding sheet metal 402 to move horizontally along it. Through the transmission link 409 and in cooperation with the transmission push rod 404, the L-shaped pressure plate 403 can be driven to descend. The L-shaped pressure plate 403 can press the two sides of the PVC artificial leather cutting part to achieve the positioning of the PVC artificial leather, assist in subsequent laser cutting, and prevent material accumulation. After the laser cutting is completed, the drive motor 414 can be started to drive the mounting sheet metal 415 to move horizontally along the adjusting screw 413. The driven gear 412 and the meshing tooth plate 411 at the lower end of the mounting sheet metal 415 can mesh to drive the rotating shaft 416 to rotate. The rubber protrusion 417 at one end of the rotating shaft 416 can realize the conveying of the waste material after laser cutting, saving manual labor and improving the working efficiency of the laser cutting device.

[0030] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments that can be applied to other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A laser cutting device for processing PVC leather, comprising a device mechanism (100), characterized in that: The equipment mechanism (100) is equipped with a translation mechanism (200), a pressing mechanism (300) is equipped with the equipment mechanism (100), and a feeding mechanism (400) is equipped with the pressing mechanism (300). The equipment mechanism (100) includes an equipment housing (101), a door panel (102) is rotatably mounted on the top of the equipment housing (101), a fixed base (104) is fixedly connected to the lower surface of the equipment housing (101), a processing table (103) is fixedly connected to the upper surface of the equipment housing (101), and a front baffle (105) is fixedly connected to the front surface of the equipment housing (101). The translation mechanism (200) includes two side slide rails (201), which are fixed to the inner wall of the equipment housing (101), and an electric slide table (202) is slidably mounted on the two side slide rails (201).

2. The laser cutting device for PVC leather processing according to claim 1, characterized in that: The electric slide table (202) has a slide groove (203), a slider (204) is slidably installed in the slide groove (203), a mounting plate (205) is fixedly connected to one side of the slider (204), and a laser cutting head (206) is fixedly connected to one side of the mounting plate (205).

3. The laser cutting device for PVC leather processing according to claim 1, characterized in that: The clamping mechanism (300) includes a connecting seat (301), which is fixed to the front surface of the fixed base (104). Side connecting brackets (302) are rotatably installed at both ends of the connecting seat (301). An L-shaped bracket (303) is fixed to the upper end of each of the two side connecting brackets (302). An upper mounting groove (304) is opened at one end of the lower surface of the L-shaped bracket (303).

4. The laser cutting device for PVC leather processing according to claim 3, characterized in that: A fixed base (306) is fixedly connected to the other end of the upper surface of the L-shaped bracket (303). A dual-axis motor (307) is fixedly connected to one side of the fixed base (306). A bevel gear set (308) is fixedly connected to the output shaft of one end of the dual-axis motor (307).

5. The laser cutting device for PVC leather processing according to claim 4, characterized in that: The bevel gear set (308) is meshed with a threaded rod (310) on one side. The threaded rod (310) is located on one side of the L-shaped bracket (303) and is rotatably mounted on the upper surface of the side connecting bracket (302). A limit groove (305) is provided at the upper end of the side connecting bracket (302).

6. The laser cutting device for PVC leather processing according to claim 5, characterized in that: A limiting block (309) is slidably installed in the limiting groove (305). One end of the limiting block (309) is engaged with the threaded rod (310), and the other end of the limiting block (309) is fixedly connected to a pressure plate (311). The pressure plate (311) is located above the processing table (103).

7. The laser cutting device for PVC leather processing according to claim 1, characterized in that: The feeding mechanism (400) includes a drive screw (401), one end of which is fixed to the output shaft of a dual-axis motor (307). A sliding sheet metal (402) is meshed on the drive screw (401). The sliding sheet metal (402) is located above the L-shaped bracket (303). A rotating component (408) is fixed to the outer wall of the lower end of the sliding sheet metal (402). A transmission connecting rod (409) is rotatably mounted on the rotating component (408).

8. The laser cutting device for PVC leather processing according to claim 7, characterized in that: An L-shaped pressure plate (403) is provided below the L-shaped bracket (303). One end of the transmission connecting rod (409) is rotatably mounted on the L-shaped pressure plate (403). A lower mounting groove (406) is provided on the upper surface of the L-shaped pressure plate (403). A lower mounting rod (410) is fixedly connected to the inner wall of the lower mounting groove (406). A transmission push rod (404) is rotatably mounted on the lower mounting rod (410). An upper mounting rod (405) is rotatably mounted on the upper end of the transmission push rod (404). The upper mounting rod (405) is fixedly connected to the inner wall of the upper mounting groove (304).

9. A laser cutting device for PVC leather processing according to claim 8, characterized in that: A drive motor (414) is fixedly connected to one side of the inner wall of the L-shaped pressure plate (403). An adjusting screw (413) is fixedly connected to the output shaft of the drive motor (414). A fixed side plate (407) is rotatably installed at one end of the adjusting screw (413). The fixed side plate (407) is fixedly connected to the outer wall of the L-shaped pressure plate (403). A meshing toothed plate (411) is also provided on one side of the adjusting screw (413). The meshing toothed plate (411) is fixedly connected between the fixed side plate (407) and the inner wall of the L-shaped pressure plate (403).

10. A laser cutting device for PVC leather processing according to claim 9, characterized in that: The adjusting screw (413) is meshed with a mounting sheet metal (415), and a rotating shaft (416) is rotatably mounted on the lower end of the mounting sheet metal (415). A driven gear (412) is fixedly connected to one end of the rotating shaft (416), and the driven gear (412) is meshed with a meshing toothed plate (411). Several evenly distributed rubber protrusions (417) are fixedly connected to the outer wall of the other end of the rotating shaft (416).

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