Double-sided flatness optical detection machine for aluminum veneer

Abstract

The application discloses a double-sided flatness optical detection machine for aluminum veneer and relates to the field of aluminum veneer detection.The double-sided flatness optical detection machine comprises a machine body, a conveying mechanism for conveying the aluminum veneer is arranged in the machine body, the conveying mechanism comprises a first conveyor and a second conveyor, the second conveyor is arranged on the right side of the first conveyor, a gap is left between the first conveyor and the second conveyor to provide a detection space for the double sides of the aluminum veneer, and movable rollers are arranged between the first conveyor and the second conveyor and are symmetrically arranged up and down.The double-sided flatness optical detection machine for aluminum veneer can uniformly arrange laser measuring devices transversely through the connecting seats, improves the detection range of the aluminum veneer and improves detection accuracy.The connecting seats and the laser measuring devices can be switched through the rotation of the movable rollers, the laser measuring devices with different installation densities can be arranged to adapt to aluminum veneers with different detection requirements, the laser measuring devices can be conveniently disassembled and replaced, and the use flexibility of the device is improved.

Description

Technical Field

[0001] This invention relates to the field of aluminum panel testing technology, specifically to a double-sided flatness optical testing machine for aluminum panels. Background Technology

[0002] During the processing of aluminum panels, operational errors can damage their flatness, affecting subsequent use. To ensure that their flatness meets the requirements of relevant usage scenarios, the flatness of aluminum panels can be tested using testing equipment. Currently, most testing machines use optical laser testing.

[0003] Prior art 1 (Chinese patent application number CN202221682304.7, published on October 18, 2022) discloses an aluminum single-panel flatness testing device, comprising a conveyor frame, side conveyor belts, and a top frame. Ball bearings are installed inside the bottom inner side of the conveyor frame, and side conveyor belts are installed at both ends of the inner side of the conveyor frame. A stabilizing detection mechanism is installed at the top of the top frame, and a guide groove is installed inside the top of the top frame. A top plate is installed above the guide groove. This application utilizes a stabilizing detection mechanism, which drives a drive screw to rotate via a motor or other drive components. The top plate, which is wrapped around the outer wall of the drive screw, moves with the rotation of the drive screw, thereby allowing a laser displacement sensor to move horizontally for scanning. Since the top plate and bottom plate are fixed at both ends of the guide slider, the ball bearings roll along the guide groove. The wheel will also roll along the top frame, so that the laser displacement sensor remains stable under the squeezing and rolling of the roller, thereby improving the detection stability of the device; Existing technology 2 (application number CN202420102498.1, Chinese patent published on November 19, 2024) is a double-sided detection device for aluminum single-panel, which relates to the technical field of aluminum single-panel detection equipment. It includes a machine tool body, a first detection box and a second detection box. A conveying table is provided above the machine tool body, and the first detection box is located above the conveying table. A support bracket is fixed to the bottom of the machine tool body by bolts, and a limit base is provided at the bottom of the support bracket. The second detection box is located below the conveying table, and a motor chamber is provided on the side of the first detection box away from the second detection box. A controller is provided on the right side of the motor chamber. After the aluminum panel enters the first inspection box, the first flatness inspection component inside the first inspection box inspects the flatness of the top of the aluminum panel. At the same time, when the aluminum panel passes through the inspection slot above the second inspection box, the second flatness inspection component inside the second inspection box inspects the flatness of the bottom of the aluminum panel.

[0004] While current testing equipment can perform double-sided testing of aluminum panels, the laser measuring instrument typically tests only one location due to the planar structure of the aluminum panel. Linear testing can be achieved by moving the aluminum panel, which has certain limitations. Furthermore, the flatness error requirements for aluminum panels vary depending on the usage conditions, making it difficult for the laser measuring instrument to be flexibly switched and adjusted according to the usage needs. Summary of the Invention

[0005] The purpose of this invention is to provide a double-sided flatness optical inspection machine for aluminum panels, in order to solve the problems mentioned in the background art. Generally, laser measuring instruments can detect a certain position and achieve linear detection by moving the aluminum panel. However, the detection has certain limitations. Furthermore, the flatness error requirements of aluminum panels under different usage conditions are also different, and laser measuring instruments are not convenient to be flexibly switched and adjusted according to usage needs.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a double-sided flatness optical inspection machine for aluminum single panels, comprising a machine body, wherein a conveying mechanism for transporting aluminum single panels is provided within the machine body, the conveying mechanism includes a first conveyor and a second conveyor, the second conveyor being located to the right of the first conveyor, a gap being left between the first and second conveyors to provide inspection space for both sides of the aluminum single panel, a movable roller being provided between the first and second conveyors, the movable rollers being symmetrically arranged vertically, and a connecting plate being rotatably connected to the outer side of the movable rollers, a mounting seat being provided on the outer side of the connecting plate, the mounting seat being connected to the machine body, a connecting seat being provided on the outer side of the movable rollers, laser measuring instruments being evenly distributed on the surface of the connecting seat, and the connecting seats being arranged in pairs on the movable rollers, and a detachable connection being formed between the connecting seat and the movable rollers, a rotation switching mechanism being provided on the outer side of the movable rollers to control the rotation of the movable rollers to switch the laser measuring instruments.

[0007] To further optimize this technical solution, a connecting block is fixed to the surface of the connecting seat, and the connecting block has a "T" shaped structure design, and the connecting block and the movable roller form a front-to-back sliding structure.

[0008] To further optimize this technical solution, a stabilizing block is fixed to the inner side of the connecting plate, and the stabilizing block and a set of connecting blocks opposite to the aluminum single plate are attached to each other and positioned inside the movable roller.

[0009] To further optimize this technical solution, a conductive connector is provided inside the movable roller, and an interface that cooperates with the conductive connector is provided at the rear end of the connecting block. After the connecting block enters the movable roller, the interface and the conductive connector form a connection.

[0010] To further optimize this technical solution, the rotation switching mechanism includes a rotation control mechanism and a rotation positioning mechanism; A rotation control mechanism is located on the front side of the movable roller to control its rotation; A rotary positioning mechanism is located on the rear side of the movable roller to position the rotation of the movable roller.

[0011] To further optimize this technical solution, the rotary positioning mechanism includes a transmission head, a connector, a positioning groove, a positioning column, a control plate, and a first spring; The transmission head is fixed to the rear side of the movable roller; The connector is located on the rear side of the transmission head and electrically connected to the transmission head, and the connector and the connecting plate form a front-to-back sliding structure. The positioning groove is located on the rear side of the movable roller; The positioning pin is set on the rear side of the positioning groove and engages with the positioning groove. The control panel is fixed to the rear of the positioning post and the connector; The first spring, located between the control board and the connecting plate, provides forward thrust to the control board.

[0012] To further optimize this technical solution, the rotation control mechanism includes a transmission shaft, a control shaft, a through groove, a transmission wheel, and a transmission belt; The drive shaft is installed on the front side of the movable roller and rotates synchronously with the movable roller; The control shaft passes through the connecting plate and is rotatably mounted on the front side of the control plate; A through slot, located inside the control axis, provides measurement space for the laser measuring instrument; The drive wheel is rotatably mounted inside the connecting plate, and is located outside the control shaft and is controlled by the rotation of the control shaft. A transmission belt is located on the outside of the transmission wheel, and the transmission wheel drives the transmission shaft to rotate via the transmission belt.

[0013] To further optimize this technical solution, a slider is fixed to the inner side of the transmission wheel, and a front-to-back sliding structure is formed between the slider and the control shaft. The control shaft controls the rotation of the transmission wheel through the slider.

[0014] To further optimize this technical solution, a second spring is provided on the rear side of the connecting plate to provide forward thrust to the connecting plate, and a guide block is fixed on the rear side of the connecting plate. The guide block and the mounting base form a front-to-back sliding structure, and a reciprocating mechanism is provided on the front side of the connecting plate.

[0015] To further optimize this technical solution, the reciprocating mechanism includes a drive block, a pressing block, a movable block, and a movable disk; The drive block is fixed to the front side of the connecting plate; The extrusion block is located below the drive block, and the top of the extrusion block has an inclined structure design; The movable block is fixed to the front side of the extrusion block, and the movable block and the mounting base form an up-and-down sliding structure; The movable disc is located below the extrusion block, and a drive motor is connected to the outer side of the movable disc. The center of the output shaft of the drive motor is offset from the center of the movable disc.

[0016] Compared with the prior art, the beneficial effects of the present invention are: The connecting seat allows the laser measuring device to be evenly arranged laterally, increasing the detection range and accuracy of aluminum panels. Furthermore, the connecting seat and the laser measuring device can be switched by rotating the movable roller. By setting different installation densities of laser measuring devices, it is possible to adapt to aluminum panels with different detection requirements. It also facilitates the disassembly and replacement of the laser measuring device, improving the flexibility of the device.

[0017] The connecting block is used to install the connecting seat onto the movable roller. After the connecting block is installed, it is used with the conductive connector to realize the circuit connection of the laser measuring device. The subsequent connection of the transmission head and the connector can be used to use the laser measuring device. The laser measuring device in use can be positioned by the support effect of the stabilizing block to keep the connecting block in place and keep its installation stable.

[0018] The rotation of the movable roller can be limited by connecting the positioning groove and the positioning column. After the positioning groove and the positioning column are connected, the transmission head and the docking head will also be connected, so that the laser measuring device and the external circuit can be connected. Subsequently, by disconnecting the positioning column and the positioning groove, the connection between the transmission head and the docking head can be disconnected at the same time, and then the rotation of the movable roller can be controlled.

[0019] The control board can be moved by pushing the control shaft, and the movable roller can be rotated by rotating the control shaft, so as to switch the laser measuring device. The unused laser measuring device after switching can also be removed for replacement or repair. It has a high replacement efficiency when the laser measuring device has a problem during testing.

[0020] The movable roller can reciprocate in the front-to-back direction under the action of the extrusion block. When the movable roller moves, it can drive the laser measuring device to move, thereby increasing the measurement range of the laser measuring device on the aluminum panel to meet the needs of higher standard inspection. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the main structure of the present invention.

[0022] Figure 2 This is a top view of the structure of the present invention.

[0023] Figure 3 This is a schematic diagram of the main structure of the body of the present invention.

[0024] Figure 4 This is a schematic diagram of the active side view structure of the present invention.

[0025] Figure 5 This is a schematic diagram of the three-dimensional structure of the movable roller of the present invention.

[0026] Figure 6 This is a schematic diagram of the disassembled structure of the connecting seat and the movable roller of the present invention.

[0027] Figure 7 This is a side sectional view of the connecting plate of the present invention.

[0028] Figure 8 This is a side sectional view of the connection between the control shaft and the transmission wheel of the present invention.

[0029] Figure 9 This is a schematic diagram of the side cross-section of the movable roller structure of the present invention.

[0030] Figure 10 This is a side view of the extrusion block structure of the present invention.

[0031] In the diagram: 1. Machine body; 2. First conveyor; 3. Second conveyor; 4. Mounting base; 5. Movable roller; 501. Drive shaft; 6. Connecting seat; 7. Laser measuring instrument; 8. Connecting plate; 9. Connecting block; 10. Conductive connector; 11. Stabilizing block; 12. Transmission head; 13. Connecting joint; 14. Positioning groove; 15. Positioning column; 16. Control board; 17. First spring; 18. Control shaft; 19. Through groove; 20. Drive wheel; 21. Drive belt; 22. Slider; 23. Second spring; 24. Guide block; 25. Drive block; 26. Extrusion block; 27. Movable block; 28. Movable disc. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1: The present invention provides the following technical solution: a double-sided flatness optical inspection machine for aluminum single panels, such as... Figure 1-4As shown, the device includes a body 1, inside which is a conveying mechanism for transporting aluminum panels. The conveying mechanism includes a first conveyor 2 and a second conveyor 3. The second conveyor 3 is located to the right of the first conveyor 2. A gap is left between the first conveyor 2 and the second conveyor 3 to provide inspection space for both sides of the aluminum panels. A movable roller 5 is arranged between the first conveyor 2 and the second conveyor 3. The movable roller 5 is symmetrically arranged vertically, and a connecting plate 8 is rotatably connected to the outer side of the movable roller 5. A mounting seat 4 is arranged on the outer side of the connecting plate 8. The mounting seat 4 is connected to the body 1. A connecting seat 6 is arranged on the outer side of the movable roller 5. Laser measuring instruments 7 are evenly distributed on the surface of the connecting seat 6. The connecting seats 6 are arranged in pairs on the movable roller 5, and the connecting seat 6 and the movable roller 5 form a detachable connection. A rotation switching mechanism is arranged on the outer side of the movable roller 5 to control the rotation of the movable roller 5 to switch the laser measuring instruments 7.

[0034] In use, the aluminum panel to be inspected can be placed above the first conveyor 2. A frame for centering the aluminum panel can be installed above the first conveyor 2, such as... Figure 1 As shown, when the aluminum panel moves between the first conveyor 2 and the second conveyor 3, the flatness of the aluminum panel is detected by a laser measuring device 7. If the data from the laser measuring device 7 remains constant, it indicates that the aluminum panel is flat. The laser measuring device 7 can also be switched according to the detection needs. The laser measuring devices 7 installed on the surfaces of the two sets of connecting seats 6 outside the movable roller 5 have different arrangement densities, such as... Figure 4 As shown, the movable roller 5 can be switched and adjusted subsequently.

[0035] Example 2: Based on Example 1, as follows Figure 4-7 As shown, a connecting block 9 is fixed to the surface of the connecting seat 6, and the connecting block 9 has a "T" shaped structure design. The connecting block 9 and the movable roller 5 form a front-to-back sliding structure. A stabilizing block 11 is fixed to the inner side of the connecting plate 8. The stabilizing block 11 and a set of connecting blocks 9 opposite to the aluminum single plate are attached to each other and positioned inside the movable roller 5. A conductive connector 10 is provided inside the movable roller 5. An interface that cooperates with the conductive connector 10 is provided at the rear end of the connecting block 9. After the connecting block 9 enters the movable roller 5, the interface and the conductive connector 10 form a connection.

[0036] The connecting seat 6 can be removed from the outside of the movable roller 5 to replace or repair the laser measuring device 7. The connecting block 9 on the surface of the connecting seat 6, which is opposite to the aluminum single panel, is restricted by the stabilizing block 11. Figure 7 As shown, the laser measuring device 7, which cannot be disassembled and is not in use, can be disassembled. Simply pull the connecting seat 6 to pull the connecting block 9 out of the movable roller 5. At the same time, the connection between the connecting block 9 and the conductive connector 10 will also be automatically disconnected.

[0037] Example 3: Based on Example 2, such as Figure 7-10 As shown, the rotation switching mechanism further discloses a rotation control mechanism and a rotation positioning mechanism. The rotation control mechanism is located on the front side of the movable roller 5 to control the rotation of the movable roller 5. The rotation positioning mechanism is located on the rear side of the movable roller 5 to position the rotation of the movable roller 5. The rotation positioning mechanism includes a transmission head 12, a coupling head 13, a positioning groove 14, a positioning post 15, a control plate 16, and a first spring 17. The transmission head 12 is fixed on the rear side of the movable roller 5. The coupling head 13 is located on the rear side of the transmission head 12 and electrically connected to the transmission head 12. The coupling head 13 and the connecting plate 8 form a front-to-back sliding structure. The positioning groove 14 is formed on the movable roller. On the rear side of 5, a positioning post 15 is set on the rear side of the positioning groove 14 and engages with the positioning groove 14. A control plate 16 is fixed on the rear side of the positioning post 15 and the connector 13. A first spring 17 is set between the control plate 16 and the connecting plate 8 to provide forward thrust to the control plate 16. The rotation control mechanism includes a drive shaft 501, a control shaft 18, a through groove 19, a drive wheel 20, and a drive belt 21. The drive shaft 501 is installed on the front side of the movable roller 5 and rotates synchronously with the movable roller 5. The control shaft 18 passes through the connecting plate 8 and is rotatably installed on the front side of the control plate 16. The through groove 19 is opened inside the control shaft 18 to provide a spring for the control plate 16. The optical measuring device 7 provides a measuring space. A drive wheel 20 is rotatably mounted inside the connecting plate 8 and is positioned outside the control shaft 18, controlled by its rotation. A drive belt 21 is positioned outside the drive wheel 20, driving the drive shaft 501 to rotate via the drive belt 21. A slider 22 is fixed inside the drive wheel 20, forming a sliding structure between the slider 22 and the control shaft 18. The control shaft 18 controls the rotation of the drive wheel 20 via the slider 22. A second spring 23 is provided on the rear side of the connecting plate 8 to provide forward thrust, and a guide block 24 is fixed on the rear side of the connecting plate 8. The guide block 24 and the mounting... The base 4 forms a sliding structure, and the front side of the connecting plate 8 is provided with a reciprocating mechanism. The reciprocating mechanism includes a drive block 25, a pressing block 26, a movable block 27, and a movable disk 28. The drive block 25 is fixed to the front side of the connecting plate 8. The pressing block 26 is located below the drive block 25, and the upper part of the pressing block 26 is designed with an inclined structure. The movable block 27 is fixed to the front side of the pressing block 26, and the movable block 27 and the mounting base 4 form a sliding structure. The movable disk 28 is located below the pressing block 26, and a drive motor is connected to the outer side of the movable disk 28. The center of the output shaft of the drive motor and the center of the movable disk 28 are offset.

[0038] When it is necessary to control the rotation of the movable roller 5, the control shaft 18 can be pushed, in conjunction with... Figure 7 and Figure 9As shown, the control shaft 18 pushes the control plate 16 to move, and the control plate 16 drives the positioning post 15 and the connector 13 to move, disconnecting the connection between the positioning post 15 and the positioning groove 14, as well as the connection between the connector 13 and the transmission head 12. At the same time, the slider 22 slides within the control shaft 18, as... Figure 8 As shown, the movable roller 5 is made rotatable, and then the rotatable control shaft 18 drives the transmission wheel 20 to rotate. The transmission wheel 20 drives the transmission shaft 501 to rotate via the transmission belt 21, causing the movable roller 5 to rotate. The surface of the transmission shaft 501 is provided with a wheel body that cooperates with the transmission belt 21. The connection can be a pulley engagement or other structures that can meet the transmission requirements. During testing, the movable roller 5 can also be controlled to move back and forth as needed. Figure 10 As shown, the movable disk 28 can be eccentrically rotated by the drive motor. The movable disk 28 can push the extrusion block 26 to move, so that the extrusion block 26 reciprocates to extrude the drive block 25 to move. In conjunction with the second spring 23, the connecting plate 8 and the movable roller 5 are moved, thereby improving the measurement range of the laser measuring instrument 7.

[0039] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0040] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "set up," "install," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A double-sided flatness optical inspection machine for aluminum single panels, comprising a machine body (1), wherein a conveying mechanism for transporting aluminum single panels is provided inside the machine body (1); characterized in that: The conveying mechanism includes a first conveyor (2) and a second conveyor (3). The second conveyor (3) is located to the right of the first conveyor (2). A gap is left between the first conveyor (2) and the second conveyor (3) to provide inspection space for both sides of the aluminum single panel. A movable roller (5) is provided between the first conveyor (2) and the second conveyor (3). The movable roller (5) is symmetrically arranged vertically, and a connecting plate (8) is rotatably connected to the outer side of the movable roller (5). A mounting base (4) is provided on the outer side of the connecting plate (8). The movable roller (5) is connected to the machine body (1). A connecting seat (6) is provided on the outside of the movable roller (5). Laser measuring instruments (7) are evenly distributed on the surface of the connecting seat (6). The connecting seats (6) are arranged in pairs on the movable roller (5). The connecting seat (6) and the movable roller (5) form a detachable connection. A rotation switching mechanism is provided on the outside of the movable roller (5). The movable roller (5) is rotated to switch the laser measuring instruments (7). By setting laser measuring instruments (7) with different installation densities, different aluminum single panels with different detection requirements can be adapted.

2. The double-sided flatness optical inspection machine for aluminum single panels according to claim 1, characterized in that: The surface of the connecting seat (6) is fixed with a connecting block (9), and the connecting block (9) is designed in a "T" shape. The connecting block (9) and the movable roller (5) form a front-to-back sliding structure.

3. The double-sided flatness optical inspection machine for aluminum single panels according to claim 2, characterized in that: A stabilizing block (11) is fixed to the inner side of the connecting plate (8). The stabilizing block (11) and a set of connecting blocks (9) opposite to the aluminum single plate are attached to each other and positioned inside the movable roller (5).

4. The double-sided flatness optical inspection machine for aluminum single panels according to claim 2, characterized in that: The movable roller (5) is provided with a conductive connector (10) inside. The rear end of the connecting block (9) is provided with an interface that cooperates with the conductive connector (10). After the connecting block (9) enters the movable roller (5), the interface and the conductive connector (10) form a connection.

5. The double-sided flatness optical inspection machine for aluminum single panels according to claim 1, characterized in that: The rotation switching mechanism includes a rotation control mechanism and a rotation positioning mechanism; A rotation control mechanism is set on the front side of the movable roller (5) to control the rotation of the movable roller (5); A rotary positioning mechanism is set on the rear side of the movable roller (5) to position the rotation of the movable roller (5).

6. The double-sided flatness optical inspection machine for aluminum single panels according to claim 5, characterized in that: The rotary positioning mechanism includes a transmission head (12), a connector (13), a positioning groove (14), a positioning column (15), a control plate (16), and a first spring (17). The transmission head (12) is fixed to the rear side of the movable roller (5); The connector (13) is located on the rear side of the transmission head (12) and electrically connected to the transmission head (12), and the connector (13) and the connecting plate (8) form a front-to-back sliding structure; The positioning groove (14) is located on the rear side of the movable roller (5); The positioning post (15) is set on the rear side of the positioning groove (14) and engages with the positioning groove (14); The control panel (16) is fixed to the rear side of the positioning post (15) and the connector (13); The first spring (17) is located between the control plate (16) and the connecting plate (8) to provide forward thrust to the control plate (16).

7. The double-sided flatness optical inspection machine for aluminum single panels according to claim 6, characterized in that: The rotation control mechanism includes a drive shaft (501), a control shaft (18), a through groove (19), a drive wheel (20), and a drive belt (21). The drive shaft (501) is installed on the front side of the movable roller (5) and rotates synchronously with the movable roller (5); The control shaft (18) passes through the connecting plate (8), and the control shaft (18) is rotatably mounted on the front side of the control plate (16); A through slot (19) is provided inside the control shaft (18) to provide measurement space for the laser measuring instrument (7); The drive wheel (20) is rotatably mounted inside the connecting plate (8), and the drive wheel (20) is located outside the control shaft (18) and is controlled by the rotation of the control shaft (18); A transmission belt (21) is set on the outside of the transmission wheel (20), and the transmission wheel (20) drives the transmission shaft (501) to rotate through the transmission belt (21).

8. The double-sided flatness optical inspection machine for aluminum single-panel according to claim 7, characterized in that: A slider (22) is fixed on the inner side of the transmission wheel (20). The slider (22) and the control shaft (18) form a front-to-back sliding structure. The control shaft (18) controls the rotation of the transmission wheel (20) through the slider (22).

9. The double-sided flatness optical inspection machine for aluminum single-panel according to claim 1, characterized in that: A second spring (23) is provided on the rear side of the connecting plate (8) to provide forward thrust to the connecting plate (8), and a guide block (24) is fixed on the rear side of the connecting plate (8). The guide block (24) and the mounting base (4) form a front-to-back sliding structure, and a reciprocating mechanism is provided on the front side of the connecting plate (8).

10. The double-sided flatness optical inspection machine for aluminum single-panel according to claim 9, characterized in that: The reciprocating mechanism includes a drive block (25), a pressing block (26), a movable block (27), and a movable disc (28); The drive block (25) is fixed to the front side of the connecting plate (8); The extrusion block (26) is located below the drive block (25), and the upper part of the extrusion block (26) is designed with an inclined structure. The movable block (27) is fixed to the front side of the extrusion block (26), and the movable block (27) and the mounting base (4) form an up-and-down sliding structure; The movable disc (28) is located below the extrusion block (26), and a drive motor is connected to the outer side of the movable disc (28). The center of the output shaft of the drive motor is offset from the center of the movable disc (28).

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