Plate collecting machine for electroplating etching line

Abstract

The utility model relates to the technical field of circuit board production, and provides a board collecting machine for an electroplating etching line, which comprises a fixed frame, the controller is fixedly connected to one side of the fixing frame; the output end of the pneumatic telescopic rod is fixedly connected with a sliding plate, negative pressure bases are arranged on the two sides of the sliding plate, and negative pressure suction cups are fixedly connected to the bottom ends of the negative pressure bases at equal intervals. The conveying belt is arranged at the lower end of the other side of the inner wall of the fixing frame; the placing frame is fixedly connected to the lower end of the inner wall of the fixing frame; the output end of the hydraulic telescopic rod is fixedly connected with a supporting plate, and a placing plate is arranged at the top end of the supporting plate. Through the arranged adjusting assembly, the sliding plate and the negative pressure seats, after the two negative pressure seats slide to the proper length, limiting and fixing of the negative pressure seats after sliding are achieved through the adjusting assembly, then adjustment can be conducted according to the sizes of different circuit boards, the negative pressure suction cups can be adsorbed to the two sides of the circuit boards, and the stability of adsorption and transfer of the circuit boards is improved.

Description

Technical Field

[0001] This utility model relates to the field of circuit board manufacturing technology, specifically to a board take-up machine for electroplating and etching lines. Background Technology

[0002] In the production process of circuit boards, etching lines are one of the key steps. They remove unwanted copper foil through chemical or physical methods to form the desired circuit pattern. After the electroplating etching line is completed, the etched circuit boards need to be collected. Therefore, corresponding board collecting machines have been developed to collect and process the etched circuit boards to ensure the smooth operation of the production line.

[0003] A search revealed an existing patent (publication number: CN216471326U) that discloses a stacked paper clamping and collecting machine for etching plates. The machine includes two side plates arranged symmetrically. A rear plate is fixedly mounted to the rear ends of both side plates. Two first support legs are mounted on the lower ends of each side plate. A warning light is mounted on the upper right side of the rear plate. A fixed frame is mounted on the middle of the front end of the rear plate. A second support leg is mounted on the lower front end of the fixed frame. A linear motor module is mounted on the upper front end of the rear plate. A stacking mechanism is provided at the output end of the linear motor module. A lifting mechanism is provided on the left front end of the rear plate. A raw material placement platform with an L-shaped structure is mounted on the right front end of the rear plate. This invention achieves stacked paper clamping and collecting of etching plates by using a linear motor module, a raw material placement platform, and a stacking platform in conjunction with a stacking mechanism. It can simultaneously stack two stacks of etching plates, effectively improving the efficiency of etching plate collecting.

[0004] However, in the above solution, it is inconvenient to adjust the spacing between the negative pressure suction cups. The circuit boards are of different sizes, so when the circuit board is large, the negative pressure suction cup is in the middle of the circuit board, which will reduce the adsorption stability. When the circuit board is small, the negative pressure suction cup has difficulty adsorbing the circuit board, which is not conducive to the board collection operation after etching.

[0005] In view of this, the present invention proposes a plate take-up machine for electroplating and etching lines. Utility Model Content

[0006] This invention proposes a plate take-up machine for electroplating and etching lines, which solves the problem of inconvenience in adjusting the spacing between negative pressure suction cups in related technologies.

[0007] The technical solution of this utility model is as follows: A plate receiving machine for an electroplating etching line includes a fixed frame; a controller fixedly connected to one side of the fixed frame; a pneumatic telescopic rod disposed on one side of the inner top wall of the fixed frame, the output end of the pneumatic telescopic rod being fixedly connected to a sliding plate, negative pressure seats being disposed on both sides of the sliding plate, and negative pressure suction cups being fixedly connected at equal intervals at the bottom end of the negative pressure seats; an adjustment component mounted on the sliding plate, the adjustment component being used to limit and fix the negative pressure seats after sliding; a moving component mounted on the inner top wall of the fixed frame, the moving component being used to realize the back-and-forth sliding of the sliding plate; a conveyor belt disposed on the lower end of the other side of the inner wall of the fixed frame; a placement frame fixedly connected to the lower end of the inner wall of the fixed frame; hydraulic telescopic rods symmetrically fixedly connected to the inner bottom wall of the placement frame, the output end of the hydraulic telescopic rod being fixedly connected to a support plate, and a placement plate being disposed at the top end of the support plate; and a limiting component mounted on the top end of the placement plate, the limiting component being used to limit the placement of circuit boards and papers of different sizes.

[0008] The adjustment assembly includes: sliding grooves symmetrically formed on both sides of the sliding plate, with adjustment grooves formed at the upper ends of both sides inside the sliding plate; an adjustment block slidably connected inside the adjustment groove, the bottom end of the adjustment block extending into the interior of the sliding groove, and a connecting rod extending to the outside of the adjustment groove fixedly connected to the top end of the adjustment block; an adjustment spring wound around the surface of the connecting rod, with both ends of the adjustment spring fixedly connected to the top wall inside the adjustment groove and the top end of the adjustment block, respectively; a pull rod fixedly connected to the top ends of the two connecting rods; and a sliding rod fixedly connected to one side of the negative pressure seat, with adjustment holes evenly spaced at the top end of the sliding rod.

[0009] Preferably, the sliding rod and the interior of the sliding groove form a sliding structure, and the sliding rod and the sliding groove are cross-shaped.

[0010] Preferably, the bottom end of the adjusting block and the interior of the adjusting hole form an engaging structure, and the depth of the adjusting hole is less than the depth of the adjusting groove.

[0011] Preferably, the limiting component includes: a fixing groove equally spaced at the top of the placement plate, and a positioning groove formed at the top of the placement plate on one side of the fixing groove; a sliding rod fixedly connected to the inner wall of the fixing groove, and a centering plate slidably connected to the surface of the sliding rod; a fixing block fixedly connected to the lower end of one side of the centering plate; and a locking bolt threadedly connected to the top side of the fixing block, the bottom end of the locking bolt penetrating the fixing block and rotatably connected to an elastic locking block, the elastic locking block forming an engaging structure with the inner wall of the positioning groove.

[0012] Preferably, the inner wall of the placement rack has grooves on both sides, and a slider that slides in cooperation with the inside of the groove is fixedly connected to one side of the support plate.

[0013] Preferably, the top of the support plate has symmetrical slots on both sides, and the bottom of the placement plate is fixedly connected to the two sides of the slots, with the slots and the slots being convex in shape.

[0014] Preferably, the moving component includes: a threaded rod threadedly connected to the upper end of the inner wall of the fixed frame; a threaded plate threadedly connected to the surface of the threaded rod, the bottom end of the threaded plate being fixedly connected to the top end of the pneumatic telescopic rod; and a servo motor fixedly connected to the upper end of one side of the fixed frame, the output end of the servo motor being fixedly connected to one end of the threaded rod via a coupling.

[0015] Preferably, auxiliary rods are fixedly connected to the upper ends of the inner walls of the fixing brackets at both ends of the threaded rod, and the surfaces of the auxiliary rods and the threaded plate form a sliding structure.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. In this utility model, pulling the lever causes the adjusting block to slide up until it is completely disengaged from the adjusting hole. Then, pulling the negative pressure seat causes the sliding rod to slide to a suitable length inside the sliding groove. Then, using the elastic force of the adjusting spring, the adjusting block slides down and locks into the appropriate adjusting hole, thus achieving the limiting and fixing of the sliding rod after sliding. This allows the distance between the two negative pressure seats to be changed, so that multiple negative pressure suction cups are located on both sides of the circuit board, thereby enabling it to meet the adsorption and transfer of circuit boards of different sizes. At the same time, multiple negative pressure suction cups ensure that even when the circuit board is short, there are still negative pressure suction cups to adsorb it, ensuring that the negative pressure suction cups firmly adsorb and fix circuit boards of different sizes, thus improving its practicality.

[0018] 2. In this utility model, by loosening the locking bolts, the elastic block rises to completely disengage from the positioning groove. Then, the centering plate is moved to slide on the surface of the slide rod. The sliding distance of the four centering plates can be adjusted according to the size of different circuit boards and papers. Then, the locking bolts are tightened to make the elastic block lock into the positioning groove, thereby limiting and fixing the centering plate after it slides. The four centering plates form spaces of different sizes to accommodate the limiting and centering of different sized circuit boards and papers, which facilitates the subsequent sorting and placement of collected circuit boards and improves its practicality. Attached Figure Description

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 This is a front view structural diagram of the present utility model;

[0021] Figure 2 This is a partial exploded view of the placement rack of this utility model;

[0022] Figure 3This is a partial exploded cross-sectional view of the fixing frame of this utility model;

[0023] Figure 4 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0024] Figure 5 For the present utility model Figure 3 Enlarged structural diagram at point B.

[0025] In the diagram: 1. Moving component; 101. Auxiliary rod; 102. Threaded plate; 103. Threaded rod; 104. Servo motor; 2. Fixing frame; 3. Adjusting component; 301. Pull rod; 302. Adjusting groove; 303. Sliding rod; 304. Adjusting hole; 305. Sliding groove; 306. Adjusting block; 307. Adjusting spring; 308. Connecting rod; 4. Sliding plate; 5. Negative pressure seat; 6. Conveyor belt; 7. Limiting component; 701. Centering plate; 702. Fixing groove; 703. Positioning groove; 704. Fixing block; 705. Sliding rod; 706. Elastic locking block; 707. Locking bolt; 8. Placement frame; 9. Hydraulic telescopic rod; 10. Support plate; 11. Controller; 12. Placement plate; 13. Locking plate; 14. Locking groove; 15. Sliding groove; 16. Slider; 17. Negative pressure suction cup; 18. Pneumatic telescopic rod. Detailed Implementation

[0026] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0027] Example 1

[0028] A preferred embodiment of the plate take-up machine for electroplating and etching lines provided by this utility model is, for example... Figures 1 to 5The following describes a plate receiving machine for an electroplating etching line: a fixed frame 2; a controller 11 fixedly connected to one side of the fixed frame 2; a pneumatic telescopic rod 18 disposed on one side of the inner top wall of the fixed frame 2, with a sliding plate 4 fixedly connected to the output end of the pneumatic telescopic rod 18, negative pressure seats 5 disposed on both sides of the sliding plate 4, and negative pressure suction cups 17 fixedly connected at equal intervals to the bottom end of the negative pressure seats 5; an adjustment component 3 mounted on the sliding plate 4, used to limit and fix the negative pressure seats 5 after sliding; a moving component 1 mounted on the inner top wall of the fixed frame 2, used to realize the back-and-forth sliding of the sliding plate 4; a conveyor belt 6 disposed at the lower end of the other side of the inner wall of the fixed frame 2; a placement rack 8 fixedly connected to the lower end of the inner wall of the fixed frame 2; hydraulic telescopic rods 9 symmetrically fixedly connected to the inner bottom wall of the placement rack 8, with a support plate 10 fixedly connected to the output end of the hydraulic telescopic rod 9, and a placement plate 12 disposed at the top end of the support plate 10; and a limiting component 7 mounted at the top end of the placement plate 12, used to limit the placement of circuit boards and papers of different sizes.

[0029] The adjustment assembly 3 includes: sliding grooves 305 symmetrically opened on both sides of the sliding plate 4, and adjustment grooves 302 opened at the upper ends of both sides inside the sliding plate 4; adjustment blocks 306 slidably connected inside the adjustment grooves 302, the bottom end of the adjustment blocks 306 extending into the interior of the sliding grooves 305, and the top end of the adjustment blocks 306 fixedly connected to a connecting rod 308 extending to the outside of the adjustment grooves 302; adjustment springs 307 wound around the surface of the connecting rods 308, the two ends of the adjustment springs 307 being fixedly connected to the inner top wall of the adjustment grooves 302 and the top end of the adjustment blocks 306 respectively; pull rods 301 fixedly connected to the top ends of the two connecting rods 308; and sliding rods 303 fixedly connected to one side of the negative pressure seat 5, with adjustment holes 304 evenly spaced at the top end of the sliding rods 303.

[0030] In this embodiment, after the negative pressure seat 5 is pulled to make the sliding rod 303 slide to a suitable length inside the sliding groove 305, the pull rod 301 is released. Using the elastic force of the adjusting spring 307, the adjusting block 306 slides into the suitable adjusting hole 304, thereby limiting and fixing the sliding rod 303 after sliding. This allows the distance between the two negative pressure seats 5 to be changed so that it can meet the adsorption and transfer of circuit boards of different sizes.

[0031] In a further preferred embodiment of the present invention, a sliding structure is formed between the sliding rod 303 and the sliding groove 305, and the sliding rod 303 and the sliding groove 305 are cross-shaped.

[0032] In this embodiment, the smoothness of the back-and-forth sliding of the negative pressure seat 5 is improved by utilizing the sliding of the cross-shaped sliding rod 303 and the sliding groove 305.

[0033] In a further preferred embodiment of the present invention, the bottom end of the adjusting block 306 and the interior of the adjusting hole 304 form an engaging structure, and the depth inside the adjusting hole 304 is less than the depth inside the adjusting groove 302.

[0034] In this embodiment, the bottom end of the adjusting block 306 engages with the inside of the adjusting hole 304 to achieve the limiting and fixing of the sliding rod 303 after it slides.

[0035] Example 2

[0036] Based on Example 1, a preferred embodiment of the plate take-up machine for electroplating and etching lines provided by this utility model is as follows: Figures 1 to 5 As shown: The limiting component 7 includes: a fixing groove 702 formed at an equal angle at the top of the placement plate 12, and a positioning groove 703 formed at the top of the placement plate 12 on one side of the fixing groove 702; a sliding rod 705 fixedly connected to the inner wall of the fixing groove 702, and a centering plate 701 slidably connected to the surface of the sliding rod 705; a fixing block 704 fixedly connected to the lower end of one side of the centering plate 701; a locking bolt 707 threadedly connected to the top side of the fixing block 704, the bottom end of the locking bolt 707 passing through the fixing block 704 and rotatably connected to an elastic locking block 706, and the elastic locking block 706 and the inner wall of the positioning groove 703 forming a locking structure.

[0037] In this embodiment, the centering plate 701 is moved to slide on the surface of the slide bar 705, thereby adjusting the sliding distance of the four centering plates 701 according to the size of different circuit boards and papers. Then, the locking bolt 707 is tightened so that the elastic block 706 is engaged in the positioning groove 703, thereby limiting and fixing the centering plate 701 after sliding. Thus, the four centering plates 701 form spaces of different sizes to accommodate the centering and positioning of circuit boards and papers of different sizes.

[0038] In a further preferred embodiment of the present invention, grooves 15 are provided on both sides of the inner wall of the placement rack 8, and a slider 16 that slides and engages with the inside of the groove 15 is fixedly connected to one side of the support plate 10.

[0039] In this embodiment, the sliding of the slider 16 inside the groove 15 is used to improve the stability of the support plate 10 sliding up and down.

[0040] In a further preferred embodiment of the present invention, the support plate 10 has symmetrical slots 14 on both sides of its top end, and the bottom end of the placement plate 12 is fixedly connected to the slots 14 and the slots 14 are convex in shape.

[0041] In this embodiment, the sliding engagement between the convex card plate 13 and the card slot 14 is used to achieve the limiting stability of the sliding installation between the placement plate 12 and the support plate 10.

[0042] In a further preferred embodiment of the present invention, the moving component 1 includes: a threaded rod 103 threadedly connected to the upper end of the inner wall of the fixed frame 2; a threaded plate 102 threadedly connected to the surface of the threaded rod 103, the bottom end of the threaded plate 102 being fixedly connected to the top end of the pneumatic telescopic rod 18; and a servo motor 104 fixedly connected to the upper end of one side of the fixed frame 2, the output end of the servo motor 104 being fixedly connected to one end of the threaded rod 103 via a coupling.

[0043] In this embodiment, the servo motor 104 is started to drive the threaded rod 103 to rotate, so that the threaded plate 102 slides and drives the sliding plate 4 to slide back and forth, which facilitates the adsorption and transfer of circuit boards or paper.

[0044] In a further preferred embodiment of the present invention, an auxiliary rod 101 is fixedly connected to the upper end of the inner wall of the fixing bracket 2 at both ends of the threaded rod 103, and a sliding structure is formed between the surface of the auxiliary rod 101 and the threaded plate 102.

[0045] In this embodiment, the sliding between the threaded plate 102 and the auxiliary rod 101 is used to prevent the threaded plate 102 from rotating with the rotation of the threaded rod 103, thereby improving the smoothness of the back-and-forth sliding of the threaded plate 102.

[0046] The working principle of this utility model is as follows: First, by pulling the pull rod 301, the two connecting rods 308 slide upward, which causes the adjusting block 306 to slide upward and compress the adjusting spring 307 until it is completely disengaged from the adjusting hole 304. Then, the negative pressure seat 5 is pulled so that the sliding rod 303 slides to a suitable length inside the sliding groove 305. Then, the pull rod 301 is released, and the elastic force of the adjusting spring 307 causes the adjusting block 306 to slide down and lock into the appropriate adjusting hole 304, thereby limiting and fixing the sliding rod 303 after sliding. This allows the distance between the two negative pressure seats 5 to be changed so that it can meet the adsorption and transfer of circuit boards of different sizes.

[0047] Then, by loosening the locking bolt 707, the elastic block 706 is raised to completely disengage from the positioning groove 703. Then, the centering plate 701 is moved to slide on the surface of the slide rod 705. The sliding distance of the four centering plates 701 can be adjusted according to the size of different circuit boards and papers. Then, the locking bolt 707 is tightened to make the elastic block 706 lock into the positioning groove 703, thereby limiting and fixing the centering plate 701 after it slides. The four centering plates 701 form spaces of different sizes to accommodate the centering and positioning of different sized circuit boards and papers.

[0048] Next, place the paper on the top of the placement plate 12, and connect the top connecting pipe of the negative pressure seat 5 to the external air pump. Then, start the pneumatic telescopic rod 18 to lower the sliding plate 4, which in turn lowers the negative pressure suction cup 17 to the circuit board conveyed at the top of the conveyor belt 6. Then, the external air pump generates negative pressure suction at the negative pressure suction cup 17 to facilitate the firm adsorption of the circuit board. Then, start the pneumatic telescopic rod 18 to move the circuit board onto the servo motor 104 to drive the threaded rod 103 to rotate. Utilize the threaded engagement between the threaded rod 103 and the threaded plate 102 to make the threaded plate 102 slide and drive the sliding plate 4 to be conveyed towards the placement rack 8. Then, start the pneumatic telescopic rod 18 to place the circuit board on the top of another placement plate 12. At the same time, repeat the above operation to move the sliding plate 4 above the paper and then adsorb and move the paper to the top of the circuit board.

[0049] Meanwhile, after the circuit board and paper are placed, the hydraulic telescopic rod 9 can be activated to lower the placement plate 12 for placing the circuit board and raise the placement plate 12 for placing the paper, which facilitates the subsequent adsorption or placement of the negative pressure suction cup 17. The above operation is then repeated to realize the board collection action of the etched circuit board.

[0050] Those skilled in the art should connect all electrical components and their compatible power supplies in this case via wires, and should select appropriate controllers according to actual conditions to meet control requirements. The specific connection and control sequence should refer to the working principle described above, and the electrical connection should be completed by referring to the working sequence of each electrical component. The detailed connection methods are well-known technologies in the field. The above mainly introduces the working principle and process, and will not describe the electrical control.

[0051] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A plate take-up machine for an electroplating and etching line, characterized in that, include: Fixture (2); A controller (11) is fixedly connected to one side of the mounting bracket (2); A pneumatic telescopic rod (18) is set on one side of the inner top wall of the fixed frame (2). A sliding plate (4) is fixedly connected to the output end of the pneumatic telescopic rod (18). Negative pressure seats (5) are set on both sides of the sliding plate (4). Negative pressure suction cups (17) are fixedly connected at equal intervals to the bottom end of the negative pressure seats (5). An adjustment component (3) is mounted on the sliding plate (4), the adjustment component (3) being used to limit and fix the negative pressure seat (5) after it slides; The movable component (1) is assembled on the inner top wall of the fixed frame (2), and the movable component (1) is used to realize the back-and-forth sliding of the sliding plate (4); The conveyor belt (6) is installed at the lower end of the inner wall of the fixed frame (2) on the other side; The placement rack (8) is fixedly connected to the lower end of the inner wall of the fixed frame (2); A hydraulic telescopic rod (9) is symmetrically fixedly connected to the bottom wall of the placement frame (8). A support plate (10) is fixedly connected to the output end of the hydraulic telescopic rod (9). A placement plate (12) is provided at the top of the support plate (10). A limiting component (7) is mounted on the top of the placement plate (12), the limiting component (7) being used to limit the placement of circuit boards and papers of different sizes; The adjustment component (3) includes: The sliding grooves (305) are symmetrically opened on both sides of the sliding plate (4), and the upper ends of both sides of the sliding plate (4) are provided with adjustment grooves (302); An adjusting block (306) is slidably connected inside the adjusting groove (302), the bottom end of the adjusting block (306) extends into the interior of the sliding groove (305), and the top end of the adjusting block (306) is fixedly connected to a connecting rod (308) extending to the outside of the adjusting groove (302); An adjusting spring (307) is wound around the surface of the connecting rod (308), and the two ends of the adjusting spring (307) are fixedly connected to the top wall of the adjusting groove (302) and the top of the adjusting block (306), respectively. A pull rod (301) is fixedly connected to the top of the two connecting rods (308); A sliding rod (303) is fixedly connected to one side of the negative pressure seat (5), and the top of the sliding rod (303) is provided with adjustment holes (304) at equal intervals.

2. The plate take-up machine for an electroplating and etching line according to claim 1, characterized in that, The sliding rod (303) and the interior of the sliding groove (305) form a sliding structure, and the sliding rod (303) and the sliding groove (305) are cross-shaped.

3. A plate take-up machine for an electroplating and etching line according to claim 1, characterized in that, The bottom end of the adjusting block (306) and the interior of the adjusting hole (304) form an engaging structure, and the depth inside the adjusting hole (304) is less than the depth inside the adjusting groove (302).

4. A plate take-up machine for an electroplating and etching line according to claim 1, characterized in that, The limiting component (7) includes: A fixing groove (702) is formed at an equal angle at the top of the placement plate (12), and a positioning groove (703) is formed at the top of the placement plate (12) on one side of the fixing groove (702); A slide rod (705) is fixedly connected to the inner wall of the fixed groove (702), and a center plate (701) is slidably connected to the surface of the slide rod (705); A fixing block (704) is fixedly connected to the lower end of one side of the centering plate (701); A locking bolt (707) is threaded to one side of the top of the fixing block (704). The bottom end of the locking bolt (707) passes through the fixing block (704) and is rotatably connected to an elastic locking block (706). The elastic locking block (706) and the inner wall of the positioning groove (703) form an engaging structure.

5. A plate take-up machine for an electroplating and etching line according to claim 1, characterized in that, The inner wall of the placement rack (8) is provided with sliding grooves (15) on both sides, and a slider (16) that slides in cooperation with the inside of the sliding groove (15) is fixedly connected to one side of the support plate (10).

6. A plate take-up machine for an electroplating and etching line according to claim 1, characterized in that, The support plate (10) has symmetrical slots (14) on both sides of its top end. The bottom end of the placement plate (12) is fixedly connected to a card plate (13) that slides and engages with the inside of the slot (14). The card plate (13) and the slot (14) are convex in shape.

7. A plate take-up machine for an electroplating and etching line according to claim 1, characterized in that, The moving component (1) includes: A threaded rod (103) is threadedly connected to the upper end of the inner wall of the fixed frame (2); A threaded plate (102) is threaded onto the surface of the threaded rod (103), and the bottom end of the threaded plate (102) is fixedly connected to the top end of the pneumatic telescopic rod (18). A servo motor (104) is fixedly connected to the upper end of one side of the fixed frame (2), and the output end of the servo motor (104) is fixedly connected to one end of the threaded rod (103) through a coupling.

8. A plate take-up machine for an electroplating and etching line according to claim 7, characterized in that, An auxiliary rod (101) is fixedly connected to the upper end of the inner wall of the fixing frame (2) at both ends of the threaded rod (103), and the surface of the auxiliary rod (101) and the threaded plate (102) form a sliding structure.

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