A cutting device for processing wood veneer panels

Abstract

This utility model discloses a cutting device for processing wood veneer panels, including a worktable. A cutting mechanism is provided on the worktable. The cutting mechanism includes a placement seat, a support frame, a mounting frame, a motor, a cutting blade, and a clamping mechanism. The placement seat is fixed on the top surface of the worktable. The support frame is installed on one side of the placement seat. The mounting frame rotates on the top of the support frame. The motor is fixed on the mounting frame. The cutting blade is connected to the output end of the motor through a quick-clamping mechanism. The clamping mechanism is located on the top surface of the placement seat. The quick-clamping mechanism includes an insertion rod, a fixing sleeve, a slot, an abutment plate, a hinge plate, a sliding groove, and a sliding sleeve. The beneficial effect of the quick-clamping mechanism is reflected in its innovative quick disassembly and installation design. In particular, the insertion structure between the insertion rod and the cutting blade simplifies the replacement operation of the cutting blade. Through the synergistic action of the sliding sleeve and the hinge plate, the cutting blade can be easily released from the fixing sleeve and quickly replaced, greatly shortening maintenance time and improving production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of wood veneer processing technology, and more specifically, it relates to a cutting device for wood veneer processing. Background Technology

[0002] Cutting is a crucial step in the processing of wood veneer panels. To ensure the processing accuracy of the veneer panels in terms of size and edge quality, high-speed rotary cutting discs are usually used to divide them. Since veneer panels are mostly composite materials with a high-density veneer layer on the surface, the sharpness and strength of the cutting tools are required during cutting. In order to maintain production efficiency and processing quality, the cutting disc often needs to run continuously for a long time, resulting in rapid wear. Therefore, frequent replacement of cutting discs has become a common requirement in daily production. However, the existing equipment is often complicated to operate during the replacement process, requiring multiple disassembly steps and even the use of additional tools, which seriously affects the continuity of the processing flow and reduces work efficiency.

[0003] On the other hand, the actual working environment on the production site places higher demands on the convenience of equipment maintenance. If workers need to spend too much time or perform complicated operations when changing the cutting blade, it will not only delay the production cycle, but may also cause safety hazards due to improper operation. At present, most cutting devices do not fully consider the speed and ease of operation of cutting blade replacement in their structural design, especially in the case of narrow space or limited installation angle, the replacement process is particularly difficult. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] In view of the problems existing in the prior art, the present invention provides a cutting device for processing wood veneer panels to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cutting device for processing wood veneer panels, comprising a worktable, a cutting mechanism provided on the worktable, the cutting mechanism comprising a placement seat, a support frame, a mounting frame, a motor, a cutting blade, and a pressing mechanism, the placement seat being fixed to the top surface of the worktable, the support frame being installed on one side of the placement seat, the mounting frame being rotatable at the top of the support frame, the motor being fixed to the mounting frame, the cutting blade being connected to the output end of the motor via a quick-clamping mechanism, and the pressing mechanism being provided on the top surface of the placement seat, the quick-clamping mechanism comprising an insert rod, a fixing sleeve, a slot, an abutment plate, a hinge plate, a sliding groove, and a sliding sleeve, the insert rod being fixed to the output end of the motor and inserted into the cutting blade, the fixing sleeve being inserted into the top of the insert rod, the slot being provided on the outer wall of the insert rod, the abutment plate being provided with multiple sets of hinges on the inner side of the fixing sleeve, the hinge plate being connected to the bottom end of the multiple sets of abutment plates, the sliding groove being provided with multiple sets distributed on the outer wall of the fixing sleeve, and the sliding sleeve sliding within the multiple sets of sliding grooves and hinged to the multiple sets of hinge plates.

[0007] The present invention is further configured such that a limiting mechanism is provided on the outer side of the fixed sleeve. The limiting mechanism includes a sliding rod, a limiting block, a rotating sleeve, a limiting groove, an unlocking hole, and a positioning sleeve. Multiple sets of sliding rods are fixed to the top surface of the sliding sleeve, and the limiting block is fixed to the top of the multiple sets of sliding rods. The rotating sleeve rotates on the outer wall of the fixed sleeve. Multiple sets of limiting grooves are distributed on the bottom surface of the rotating sleeve and are slidably connected to the multiple sets of sliding rods respectively. The unlocking hole is provided at one end of the multiple sets of limiting grooves, and the positioning sleeve is fixed to the top surface of the rotating sleeve. This configuration enables multi-point limiting and precise control of the rotating sleeve, prevents rotational deviation, and improves the stability and safety of the cutting device.

[0008] The present invention is further configured such that the insert rod is polygonal and is inserted into the cutting disc, and the inner side of the fixing sleeve is provided with an insertion hole, which is adapted to the insert rod, so as to ensure that the cutting disc and the insert rod are tightly connected, effectively preventing the cutting disc from becoming loose during operation, and improving cutting accuracy and safety.

[0009] The present invention is further provided that the top surface of the sliding sleeve is connected to a push spring, and multiple sets of push springs are provided with their top ends connected to the rotating sleeve, which can realize the automatic rebound limit function, so that the rotating sleeve can automatically reset after the operation is completed, thereby improving the ease of use and operating efficiency of the equipment.

[0010] The present invention is further configured such that each of the multiple sets of push springs is fixedly provided with a connecting ring at its top, and each of the multiple sets of connecting rings is fixedly provided with an arc-shaped block on its top surface. The bottom surface of the rotating sleeve is provided with an annular groove, and the annular groove is slidably connected with the multiple sets of arc-shaped blocks to form a stable guiding structure, ensuring the smoothness and guidance of the rotating sleeve during rotation, and avoiding jamming and deviation during rotation.

[0011] The present invention is further configured such that a sliding hole is provided on the inner side of the positioning sleeve, and multiple sets of sliding holes are provided, each of which is connected to a compression spring. The bottom end of each set of compression springs is connected to a positioning block. A positioning groove is provided on the outer wall of the fixing sleeve, and multiple sets of positioning grooves are provided, each of which abuts against multiple sets of positioning blocks. This can realize a multi-point positioning structure, enhance the positioning stability of the rotating parts, and prevent operational errors caused by accidental loosening.

[0012] The present invention is further configured such that a pressure rod is fixedly provided on the outside of the motor, which can provide auxiliary pressure during the cutting process, enhance the cutting contact force, and improve processing efficiency and cutting effect.

[0013] The present invention is further configured such that the clamping mechanism includes a pressure plate, a locking rod, a limiting block, and a slot. One end of the pressure plate is rotatably mounted on the outside of the placement seat, the locking block is rotatably mounted on one end of the pressure plate, the limiting block is fixed on the top surface of the placement seat, and the slot is located on the outer wall of the limiting block. The workpiece can be quickly fixed by mechanical clamping, which improves operating efficiency and ensures the stability of the workpiece during the cutting process.

[0014] Compared with the prior art, the present invention provides a cutting device for processing wood veneer panels, which has the following advantages:

[0015] 1. The beneficial effects of the cutting mechanism are that it provides a stable support platform through the fixed placement seat and support frame on the worktable. At the same time, the efficient connection between the motor and the cutting blade ensures the stability and accuracy of the cutting operation. The cutting blade, through the cooperation of the quick clamping mechanism and the pressure fixing mechanism, makes the cutting process more efficient and maintains good operability and safety during operation. In addition, the design of the pressure fixing mechanism ensures the stability of the plate during the cutting process, avoids inaccurate cutting caused by the movement of the plate during processing, and significantly improves the cutting quality.

[0016] 2. The benefits of the quick-release mechanism are reflected in its innovative design for rapid disassembly and installation. In particular, the insertion structure between the insert rod and the cutting disc simplifies the replacement of the cutting disc. Through the synergistic action of the sliding sleeve and the hinge plate, the cutting disc can be easily released from the fixed sleeve and quickly replaced, greatly shortening maintenance time and improving production efficiency. At the same time, the cooperation between the slot and the abutment plate ensures a firm connection of the cutting disc, preventing loosening and falling off during operation and increasing the safety of the equipment.

[0017] 3. The beneficial effect of the limiting mechanism lies in its precise positioning function, which can effectively prevent the accidental movement of the rotating sleeve and ensure the stability of the cutting device during operation. Through the design of multiple sets of sliding rods and limiting grooves, the rotating sleeve can be accurately positioned and kept fixed when needed, preventing the device from shifting or loosening during operation. In addition, the combination design of compression spring and positioning block ensures the rapid response and efficient locking of the limiting mechanism, effectively avoiding instability when changing the cutting disc, and ensuring the reliability and safety of the entire cutting system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a cutting device for processing wood veneer panels according to the present invention;

[0019] Figure 2 This is a schematic diagram of the structure for unlocking the cutting disc in this utility model;

[0020] Figure 3 This is a schematic diagram showing the disassembled structure of the fixing sleeve and the insertion rod in this utility model;

[0021] Figure 4 This is a cross-sectional view of the fixing sleeve in this utility model;

[0022] Figure 5 This is a cross-sectional view of the positioning sleeve in this utility model.

[0023] In the diagram: 1. Workbench; 2. Placement seat; 3. Support frame; 4. Mounting frame; 5. Motor; 6. Cutting disc; 7. Insert rod; 8. Fixing sleeve; 9. Slot; 10. Abutment plate; 11. Hinge plate; 12. Slide groove; 13. Slide sleeve; 14. Slide rod; 15. Limiting block; 16. Rotating sleeve; 17. Limiting groove; 18. Unlocking hole; 19. Positioning sleeve; 20. Insertion hole; 21. Push spring; 22. Connecting ring; 23. Arc block; 24. Annular groove; 25. Slide hole; 26. Compression spring; 27. Positioning block; 28. Positioning groove; 29. ​​Pressure rod; 30. Pressure plate; 31. Locking rod; 32. Limiting block; 33. Slot. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0026] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0027] Please see Figures 1-5 A cutting device for processing wood veneer panels includes a worktable 1, on which a cutting mechanism is mounted. The cutting mechanism includes a placement seat 2, a support frame 3, a mounting frame 4, a motor 5, a cutting blade 6, and a clamping mechanism. The placement seat 2 is fixed to the top surface of the worktable 1. The support frame 3 is mounted on one side of the placement seat 2. The mounting frame 4 rotates on the top of the support frame 3. The motor 5 is fixed to the mounting frame 4. The cutting blade 6 is connected to the output end of the motor 5 via a quick-clamping mechanism. The clamping mechanism is located on the top surface of the placement seat 2. It includes a plug rod 7, a fixing sleeve 8, a slot 9, an abutment plate 10, a hinge plate 11, a sliding groove 12, and a sliding sleeve 13. The plug rod 7 is fixed to the output end of the motor 5 and plugged into the cutting blade 6. The fixing sleeve 8 is plugged into the top of the plug rod 7. The slot 9 is provided on the outer wall of the plug rod 7. The abutment plate 10 is provided with multiple sets of hinges on the inner side of the fixing sleeve 8. The hinge plate 11 is connected to the bottom end of the multiple sets of abutment plates 10. The sliding groove 12 is provided with multiple sets distributed on the outer wall of the fixing sleeve 8. The sliding sleeve 13 slides in the multiple sets of sliding grooves 12 and is hinged to the multiple sets of hinge plates 11.

[0028] A limiting mechanism is provided on the outer side of the fixed sleeve 8. The limiting mechanism includes a slide rod 14, a limiting block 15, a rotating sleeve 16, a limiting groove 17, an unlocking hole 18, and a positioning sleeve 19. Multiple sets of slide rods 14 are fixed to the top surface of the sliding sleeve 13. The limiting block 15 is fixed to the top of the multiple sets of slide rods 14. The rotating sleeve 16 rotates on the outer wall of the fixed sleeve 8. Multiple sets of limiting grooves 17 are distributed on the bottom surface of the rotating sleeve 16 and are slidably connected to the multiple sets of slide rods 14 respectively. The unlocking hole 18 is provided at one end of the multiple sets of limiting grooves 17. The positioning sleeve 19 is fixed to the top surface of the rotating sleeve 16. This allows the rotation range of the rotating sleeve 16 to be controlled by inserting the limiting block 15 into the limiting groove 17 and unlocking it through the unlocking hole 18, thus realizing the principle of positioning and limiting.

[0029] The insertion rod 7 is polygonal and is inserted into the cutting plate 6. The inner side of the fixing sleeve 8 has an insertion hole 20, which is adapted to the insertion rod 7. The polygonal insertion rod 7 is inserted into the insertion hole 20 and tightly cooperates with the cutting plate 6 to form a non-slip rotational connection, ensuring the torque transmission and positioning accuracy during the transmission process.

[0030] The top surface of the sliding sleeve 13 is connected to a push spring 21. Multiple sets of push springs 21 are provided, and the top end is connected to the rotating sleeve 16. The push spring 21 provides elastic force so that the rotating sleeve 16 can rebound or be stably held in a certain position when rotating, realizing the principle of automatic reset and auxiliary limit.

[0031] Each of the multiple sets of push springs 21 has a connecting ring 22 fixed at its top end, and each of the multiple sets of connecting rings 22 has an arc-shaped block 23 fixed on its top surface. The bottom surface of the rotating sleeve 16 has an annular groove 24, which is slidably connected to the multiple sets of arc-shaped blocks 23. The principle of guiding and limiting the sliding of the rotating sleeve 16 during rotation is achieved by guiding the arc-shaped blocks 23 in the annular groove 24.

[0032] The inner side of the positioning sleeve 19 is provided with a sliding hole 25. Multiple sets of sliding holes 25 are provided, and each set of compression springs 26 is connected to the inner side. The bottom end of each set of compression springs 26 is connected to a positioning block 27. The outer wall of the fixed sleeve 8 is provided with a positioning groove 28. Multiple sets of positioning grooves 28 are provided and abut against each of the multiple sets of positioning blocks 27. The positioning blocks 27 are pushed into the positioning grooves 28 by the compression springs 26, thereby realizing the principle of quick positioning and locking of the rotating sleeve 16 or related components.

[0033] A pressure rod 29 is fixedly provided on the outside of the motor 5. The pressure rod 29 provides additional clamping or adjustment functions during the movement of the motor 5, realizing the principle of auxiliary fixing or adjustment of contact pressure.

[0034] The clamping mechanism includes a pressure plate 30, a locking rod 31, a limiting block 32, and a slot 33. One end of the pressure plate 30 is rotatably mounted on the outside of the placement seat 2. The locking block is rotatably mounted on one end of the pressure plate 30. The limiting block 32 is fixed on the top surface of the placement seat 2. The slot 33 is located on the outer wall of the limiting block 32. After the pressure plate 30 is pressed down, the locking rod 31 is inserted into the slot 33 and limited by the limiting block 32, thus realizing the principle of mechanically clamping and fixing the placed object.

[0035] In this embodiment, during use, the board is placed on the top surface of the placement base 2, the pressure plate 30 is rotated so that its bottom surface abuts against the top surface of the board, and then the locking rod 31 is rotated to engage in the slot 33 to fix the board. The motor 5 is started so that its output end drives the insertion rod 7 to rotate, which in turn drives the cutting blade 6 to rotate. Pressing the pressure rod 29 causes the mounting bracket 4 to rotate along the support frame 3, driving the cutting blade 6 to cut the board. When the cutting blade 6 needs to be replaced, rotating the rotating sleeve 16 causes multiple sets of sliding rods 14 to slide along the limiting groove 17 into the unlocking hole 18. The moving sleeve 16 drives the positioning sleeve 19 to rotate. Through multiple sets of arc-shaped positioning grooves 28, the positioning grooves 28 are pushed to slide into the sliding hole 25 and squeeze the compression spring 26. Multiple sets of limiting blocks 15 release their contact with the outer wall of the rotating sleeve 16. Through multiple sets of push springs 21, the sliding sleeve 13 is pushed to slide along the sliding groove 12 and pulls multiple sets of hinge plates 11. Through multiple sets of hinge plates 11, the abutment plate 10 is pulled to disengage from the slot 9, and the connection between the fixing sleeve 8 and the insertion rod 7 is released. Then, the contact between the fixing sleeve 8 and the cutting piece 6 can be released, and the cutting piece 6 can be removed from the insertion rod 7 to complete the disassembly.

[0036] More specifically, when installing the cutting blade 6, the cutting blade 6 is inserted into the insert rod 7, and then the fixing sleeve 8 is inserted into the top of the insert rod 7 and abuts against the cutting blade 6. The sliding sleeve 13 is pushed to slide along the sliding groove 12 and push the multiple sets of hinge plates 11. The multiple sets of hinge plates 11 push the abutment plate 10 to engage in the slot 9. At the same time, the sliding sleeve 13 pushes the sliding rod 14 and squeezes the push spring 21. Then, the rotating sleeve 16 is rotated so that the multiple sets of sliding rods 14 slide into the limiting groove 17, so that the multiple sets of limiting blocks 15 abut against the outer wall of the rotating sleeve 16 to lock the sliding sleeve 13. At this time, the multiple sets of compression springs 26 reset and push the positioning block 27 to abut against the positioning groove 28 to position the rotating sleeve 16.

[0037] In summary, the overall equipment is used or operated as follows: When in use, place the sheet material on the top surface of the placement base 2, rotate the pressure plate 30 so that its bottom surface abuts against the top surface of the sheet material, then rotate the locking rod 31 to engage it in the slot 33 to fix the sheet material. Start the motor 5 so that its output end drives the insertion rod 7 to rotate, which in turn drives the cutting blade 6 to rotate. Press the pressure rod 29 to make the mounting frame 4 rotate along the support frame 3, causing the cutting blade 6 to cut the sheet material. When the cutting blade 6 needs to be replaced, rotate the rotating sleeve 16 to make multiple sets of sliding rods 14 slide along the limiting groove 17 to the unlocking hole. Inside 18, the rotating sleeve 16 drives the positioning sleeve 19 to rotate. Through multiple sets of arc-shaped positioning grooves 28, the positioning grooves 28 are pushed to slide into the sliding hole 25 and squeeze the compression spring 26. Multiple sets of limiting blocks 15 release their contact with the outer wall of the rotating sleeve 16. Through multiple sets of push springs 21, the sliding sleeve 13 is pushed to slide along the sliding groove 12 and pulls multiple sets of hinge plates 11. Through multiple sets of hinge plates 11, the abutment plate 10 is pulled to disengage from the slot 9, releasing the connection between the fixing sleeve 8 and the insertion rod 7. Then, the contact between the fixing sleeve 8 and the cutting piece 6 can be released, and the cutting piece 6 can be removed from the insertion rod 7 to complete the disassembly.

[0038] When installing the cutting blade 6, the cutting blade 6 is inserted into the insertion rod 7, and then the fixing sleeve 8 is inserted into the top of the insertion rod 7 and abuts against the cutting blade 6. The sliding sleeve 13 is pushed to slide along the sliding groove 12 and push the multiple sets of hinge plates 11. The multiple sets of hinge plates 11 push the abutment plate 10 to engage in the slot 9. At the same time, the sliding sleeve 13 pushes the sliding rod 14 and squeezes the push spring 21. Then, the rotating sleeve 16 is rotated so that the multiple sets of sliding rods 14 slide into the limiting groove 17, so that the multiple sets of limiting blocks 15 abut against the outer wall of the rotating sleeve 16 to lock the sliding sleeve 13. At this time, the multiple sets of compression springs 26 reset and push the positioning block 27 to abut against the positioning groove 28 to position the rotating sleeve 16.

[0039] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A cutting device for processing wood veneer panels, comprising a worktable (1), characterized in that: The workbench (1) is equipped with a cutting mechanism, which includes a placement seat (2), a support frame (3), a mounting frame (4), a motor (5), a cutting blade (6), and a clamping mechanism. The placement seat (2) is fixed to the top surface of the workbench (1), the support frame (3) is installed on one side of the placement seat (2), the mounting frame (4) rotates on the top of the support frame (3), the motor (5) is fixed on the mounting frame (4), and the cutting blade (6) is connected to the output end of the motor (5) through a quick-clamping mechanism. The clamping mechanism is set on the top surface of the placement seat (2), and the quick-clamping mechanism includes an insertion rod (7) and a fixing sleeve (8). The device includes a slot (9), abutment plate (10), hinge plate (11), slide groove (12) and slide sleeve (13). The insertion rod (7) is fixed at the output end of the motor (5) and inserted into the cutting blade (6). The fixing sleeve (8) is inserted into the top of the insertion rod (7). The slot (9) is set on the outer wall of the insertion rod (7). The abutment plate (10) is provided with multiple sets of hinges on the inner side of the fixing sleeve (8). The hinge plate (11) is connected to the bottom of multiple sets of abutment plates (10). The slide groove (12) is provided with multiple sets distributed on the outer wall of the fixing sleeve (8). The slide sleeve (13) slides in multiple sets of slide grooves (12) and is hinged to multiple sets of hinge plates (11).

2. The cutting device for processing wood veneer panels according to claim 1, characterized in that: The fixed sleeve (8) is provided with a limiting mechanism on its outer side. The limiting mechanism includes a slide rod (14), a limiting block (15), a rotating sleeve (16), a limiting groove (17), an unlocking hole (18), and a positioning sleeve (19). The slide rod (14) is provided with multiple sets fixed on the top surface of the slide sleeve (13). The limiting block (15) is fixed on the top of the multiple sets of slide rods (14). The rotating sleeve (16) rotates on the outer wall of the fixed sleeve (8). The limiting groove (17) is provided with multiple sets distributed on the bottom surface of the rotating sleeve (16) and slidably connected to the multiple sets of slide rods (14). The unlocking hole (18) is provided at one end of the multiple sets of limiting grooves (17). The positioning sleeve (19) is fixed on the top surface of the rotating sleeve (16).

3. The cutting device for processing wood veneer panels according to claim 2, characterized in that: The insertion rod (7) is polygonal and is inserted into the cutting piece (6). The inner side of the fixing sleeve (8) is provided with an insertion hole (20), which is adapted to the insertion rod (7).

4. The cutting device for processing wood veneer panels according to claim 3, characterized in that: The top surface of the sliding sleeve (13) is connected to a push spring (21), and multiple sets of push springs (21) are provided, with their top ends connected to the rotating sleeve (16).

5. A cutting device for processing wood veneer panels according to claim 4, characterized in that: multiple sets Each push spring (21) has a connecting ring (22) fixedly provided at its top end. Each of the multiple sets of connecting rings (22) has an arc-shaped block (23) fixedly provided on its top surface. The bottom surface of the rotating sleeve (16) has an annular groove (24) which is slidably connected to the multiple sets of arc-shaped blocks (23).

6. The cutting device for processing wood veneer panels according to claim 5, characterized in that: The positioning sleeve (19) has a sliding hole (25) on its inner side. The sliding hole (25) is provided in multiple sets and each of them is connected to a compression spring (26). The bottom of each of the multiple sets of compression springs (26) is connected to a positioning block (27). The outer wall of the fixing sleeve (8) has a positioning groove (28). The positioning groove (28) is provided in multiple sets and abuts against each of the multiple sets of positioning blocks (27).

7. The cutting device for processing wood veneer panels according to claim 6, characterized in that: A pressure rod (29) is fixedly provided on the outside of the motor (5).

8. The cutting device for processing wood veneer panels according to claim 7, characterized in that: The clamping mechanism includes a pressure plate (30), a locking rod (31), a limiting block (32), and a slot (33). One end of the pressure plate (30) rotates to the outside of the placement seat (2), the locking rod is rotated and installed at one end of the pressure plate (30), the limiting block (32) is fixed to the top surface of the placement seat (2), and the slot (33) is located on the outer wall of the limiting block (32).

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