Extrusion molding device for cable production and processing

Abstract

The invention discloses an extrusion molding device for cable production and processing, and relates to the technical field of cable production, the extrusion molding device comprises a bottom plate, a base, a cooling box and an extrusion molding machine, one side surface of the cooling box is symmetrically provided with vertical plates, and water absorption mechanisms are symmetrically arranged between the vertical plates; a collecting box is fixedly connected to the bottom face of the vertical plate, a lead screw is rotationally arranged in the collecting box, a water scraping mechanism is arranged in the lead screw, and a gear is fixedly connected to one end of the lead screw. A mounting plate is fixedly connected to the rear end face of the cooling box, an electric push rod is arranged on the mounting plate, and a driving mechanism is arranged at the movable end of the electric push rod; through the use of the water absorption mechanism, water on the surface of a cable which just comes out of water can be conveniently absorbed, the dryness of the surface of the cable is ensured, meanwhile, water resource waste caused by water dropping on the ground is avoided, the phenomenon that workers fall down due to the fact that the ground is soaked by water is also avoided, and work of the workers is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of cable production, and in particular to an extrusion device for cable production and processing. Background Art

[0002] Cables are wires made of one or more mutually insulated conductors and an outer insulating protective layer, which are laid underground or in the air. Cables are generally composed of three parts: conductor, insulating layer and protective layer. Extrusion devices are required to wrap the insulating layer or protective layer on the conductor. However, when the existing extrusion device is in use, the surface of the cable will be very hot after being produced. In order to quickly cool the cable, the cable will be placed in water. After the cable comes out of the water, water will stick to the surface of the cable. This water will drip onto the ground as the cable moves out of the water tank, causing the ground to be soaked in water. The water dripping on the ground cannot be recovered, thereby causing a waste of water resources. At the same time, the ground being soaked in water will make the ground very slippery, and workers walking on the water-soaked ground will easily slip, affecting the normal work of the workers. Summary of the invention

[0003] In order to solve the problems in the background technology, the present invention proposes an extrusion device for cable production and processing.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: An extrusion device for cable production and processing, comprising a bottom plate, a base, a cooling box and an extruder, wherein vertical plates are symmetrically arranged on one side of the cooling box, and water absorption mechanisms are symmetrically arranged between the vertical plates; A collecting box is fixedly connected to the bottom surface of the vertical plate, a screw rod is rotatably arranged in the collecting box, a wiper mechanism is arranged in the screw rod, and a gear is fixedly connected to one end of the screw rod; A mounting plate is fixedly connected to the rear end surface of the cooling box, an electric push rod is arranged on the mounting plate, and a driving mechanism which first acts on the water absorption mechanism and then acts on the gear is arranged on the movable end of the electric push rod.

[0005] Preferably, the water absorption mechanism includes a rectangular box symmetrically slidably arranged between the vertical plates, an extrusion plate slidably arranged in the rectangular box and water-absorbing cotton arranged on the extrusion plate, rectangular openings are provided at both ends of the rectangular box, circular rods matching with the rectangular openings are provided at both ends of the extrusion plate, an extrusion spring is provided between the circular rod and the rectangular opening, and an adjusting piece matching with the circular rod is symmetrically provided on the vertical plates, an annular ring is slidably provided on one of the vertical plates, and one end of the circular rod movably passes through the adjusting piece and extends into the annular ring.

[0006] Preferably, the adjusting member 1 comprises a contact groove formed on the vertical plate, a parallel groove is formed at one end of the contact groove, an extrusion groove is formed at one end of the parallel groove, and the circular rod is slidably arranged with the contact groove, the parallel groove and the extrusion groove.

[0007] Preferably, the driving mechanism includes a bar frame arranged at the movable end of the electric push rod, a movable block slidably arranged in the bar frame and two extrusion springs, and the two extrusion springs are located at one end close to the electric push rod, a connecting rod fixed to the annular ring is provided on the top surface of the movable block, and a bar tooth plate matching the gear is fixed to the bottom surface of the bar frame.

[0008] Preferably, the wiper mechanism includes a strip plate threadedly connected to the outer wall of the screw rod, and the strip plate is slidably arranged with the inner wall of the collection box, a strip opening is provided on the bottom surface of the strip plate, a scraper is slidably arranged in the strip opening, short cylinders are fixed on both side surfaces of the scraper, and an adjustment part 2 is provided on the inner wall of the collection box to cooperate with the short cylinder.

[0009] Preferably, the second adjusting member includes a wiper groove opened on the inner wall of the collecting box, and a return groove is opened on the inner wall of the collecting box above the wiper groove. Both ends of the wiper groove and the return groove are connected through an inclined groove, and the two inclined grooves are parallel to each other, and a limit member is provided in the inclined groove.

[0010] Preferably, the limiting member comprises a rectangular cavity opened on the inner wall of the inclined groove, a limiting block is slidably arranged in the rectangular cavity, and a compression spring three is arranged between the limiting block and the rectangular cavity.

[0011] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The present invention uses a water absorbing mechanism to absorb water on the surface of the cable that has just been out of water, ensure the drying of the cable surface, and prevent water from dripping on the ground and causing a waste of water resources. It also prevents the ground from being soaked by water and causing workers to fall, which is beneficial to the work of workers. When the circular rod is at the highest point of the contact groove, the two absorbent cottons are separated, which is convenient for the cable to pass through the middle of the two absorbent cottons. When the circular rod slides along the contact groove, the absorbent cottons will move relatively, and finally the circular rod moves to the intersection of the contact groove and the parallel groove, and the two absorbent cottons will wrap the cable, so as to facilitate the absorption of water on the cable surface. When the circular rod slides in the parallel groove, the absorbent cotton slides on the cable surface, which is beneficial to the drying of the cable. Finally, when the circular rod slides in the extrusion groove, the extrusion plate will squeeze the absorbent cotton to discharge the water in the absorbent cotton, avoiding excessive water absorption in the absorbent cotton and causing the water on the cable surface to not be absorbed cleanly, which is beneficial to the drying of the cable. 2. The present invention collects squeezed water by using a collection box, avoids water flowing on the ground and causing water waste, and also avoids the ground being soaked, thereby avoiding workers from slipping, which is beneficial to the production of cables; by using a scraper mechanism, it is convenient to scrape away all the water in the collection box, thereby improving the efficiency of water discharge in the collection box; it also avoids residual water in the collection box, thereby ensuring that all the water in the collection box is discharged; wherein, through the movement of the short cylinder in the scraper groove, the scraper is in close contact with the bottom surface of the collection box, thereby facilitating the pushing of the water in the collection box and facilitating the discharge of the water, and also avoids residual water on the bottom surface of the collection box, thereby ensuring that all the water is discharged; and when the short cylinder moves in the return groove, the scraper is separated from the bottom surface of the collection box, thereby avoiding water from being brought back, thereby ensuring that the water is discharged in one direction, which is beneficial to the discharge of the water. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It shows a schematic structural diagram of a front viewing angle provided by an embodiment of the present invention; Figure 2 It shows a schematic structural diagram of a rear viewing angle provided by an embodiment of the present invention; Figure 3 A schematic structural diagram of a water absorption mechanism provided in an embodiment of the present invention is shown; Figure 4 A cross-sectional view of a rectangular box according to a first viewing angle is shown; Figure 5 A cross-sectional view of a rectangular box from a second viewing angle provided by an embodiment of the present invention is shown; Figure 6 It shows a schematic structural diagram of a wiper mechanism provided according to an embodiment of the present invention; Figure 7 A schematic structural diagram of a driving mechanism provided according to an embodiment of the present invention is shown; Figure 8 It shows a schematic structural diagram of the connection between the bar frame and the bar tooth plate provided in an embodiment of the present invention; Fig. 9 It shows a schematic structural diagram of the connection between the strip plate and the scraper provided in an embodiment of the present invention; Fig.10 It shows a schematic structural diagram of an adjusting member 1 provided according to an embodiment of the present invention; Fig.11 It shows a schematic structural diagram of the adjusting member 2 provided according to an embodiment of the present invention; Fig.12 for Fig.11 A partial enlarged view of point A in the middle.

[0013] Legend: 1. Bottom plate; 2. Base; 3. Cooling box; 4. Extruder; 5. Collecting box; 6. Adjustment part one; 601. Contact groove; 602. Parallel groove; 603. Extrusion groove; 7. Vertical plate; 8. Rectangular box; 9. Gear; 10. Annular ring; 11. Connecting rod; 12. Electric push rod; 13. Mounting plate; 14. Screw rod; 15. Extrusion plate; 16. Water-absorbing cotton; 17. Adjustment part two; 1701. Scraper groove; 1702. Return groove; 1703. Inclined groove; 18. Round rod; 19. Rectangular opening; 20. Extrusion spring one; 21. Strip plate; 22. Movable block; 23. Extrusion spring two; 24. Strip frame; 25. Strip tooth plate; 26. Strip opening; 27. Short cylinder; 28. Scraper; 29. ​​Limit block; 30. Rectangular cavity; 31. Extrusion spring three. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] See also Figure 1 - Fig.12 , the present invention provides a technical solution: An extrusion device for cable production and processing, comprising a bottom plate 1, a base 2 symmetrically arranged on the bottom surface of the bottom plate 1, a cooling box 3 installed on the top surface of the bottom plate 1, and an extruder 4 installed on one side of the top surface of the bottom plate 1 (a direct reference to the prior art, and the operation process of the extruder 4 is not introduced here), a vertical plate 7 is symmetrically arranged on one side of the cooling box 3, and a water absorption mechanism is symmetrically arranged between the vertical plates 7. Through the use of the water absorption mechanism, it is convenient to absorb the water on the surface of the cable just out of the water, ensure the dryness of the cable surface, and avoid water dripping on the ground to cause a waste of water resources, and also avoid the phenomenon that the ground is soaked with water and causes workers to fall, which is beneficial to the work of the workers; A collecting box 5 is fixedly connected to the bottom surface of the vertical plate 7, which is convenient for collecting the squeezed water, avoiding water flowing on the ground and causing water waste, and also avoiding the ground from being soaked, thereby avoiding the phenomenon of workers slipping, which is beneficial to the production of cables; the collecting box 5 is provided with a water outlet (not shown in the figure) for water discharge; a screw rod 14 is rotatably provided in the collecting box 5, and a wiper mechanism is provided in the screw rod 14. Through the use of the wiper mechanism, it is convenient to scrape away all the water in the collecting box 5, thereby improving the efficiency of water discharge in the collecting box 5; at the same time, it is also avoided that there is water remaining in the collecting box 5, thereby ensuring that all the water in the collecting box 5 is discharged; one end of the screw rod 14 is fixedly connected to a gear 9; A mounting plate 13 is fixedly connected to the rear end surface of the cooling box 3, and an electric push rod 12 is arranged on the mounting plate 13. A driving mechanism which first acts on a water absorption mechanism and then acts on the gear 9 is arranged on the movable end of the electric push rod 12. By using the driving mechanism, it is convenient to first drive the water absorption mechanism to work, so as to dry the surface of the cable, and then make the wiper mechanism work, so as to clean the water in the collection box 5 and ensure that all the water in the collection box 5 is discharged.

[0016] In the present invention, the water absorption mechanism includes a rectangular box 8 symmetrically slidably arranged between the vertical plates 7, a squeezing plate 15 slidably arranged in the rectangular box 8, and a water-absorbing cotton 16 arranged on the squeezing plate 15, which are used to absorb water on the surface of the cable to ensure the dryness of the cable surface; rectangular openings 19 are provided at both ends of the rectangular box 8, and circular rods 18 matching the rectangular openings 19 are provided at both ends of the squeezing plate 15. A squeezing spring 20 is provided between the circular rod 18 and the rectangular opening 19. By using the squeezing spring 20, it is convenient to squeeze the circular rod 18 to realize the positioning of the squeezing plate 15; an adjusting member 6 matching the circular rod 18 is symmetrically provided on the vertical plate 7, and through The use of the adjusting member 6 first makes the absorbent cotton 16 contact with the surface of the cable to absorb the water on the surface of the cable and achieve the drying of the cable, and then moves the absorbent cotton 16 back and forth on the surface of the cable to better absorb the water on the surface of the cable. Finally, the absorbent cotton 16 is squeezed to squeeze out the water in the absorbent cotton 16 to avoid excessive water in the absorbent cotton 16 affecting the water absorption performance of the absorbent cotton 16, which is further beneficial to the drying of the cable surface; an annular ring 10 is slidably provided on one of the vertical plates 7 for connecting two circular rods 18 so that the two circular rods 18 move synchronously; one end of the circular rod 18 movably passes through the adjusting member 6 and extends into the annular ring 10.

[0017] In the present invention, the adjusting member 16 includes a contact groove 601 provided on the vertical plate 7, a parallel groove 602 is provided at one end of the contact groove 601, an extrusion groove 603 is provided at one end of the parallel groove 602, and the circular rod 18 is slidably arranged with the contact groove 601, the parallel groove 602 and the extrusion groove 603; wherein, when the circular rod 18 is at the highest point of the contact groove 601, the two water-absorbing cottons 16 are separated, so that the cable can pass through the middle of the two water-absorbing cottons 16; then, when the circular rod 18 slides along the contact groove 601, the water-absorbing cottons 16 will move relatively, and finally the circular rod 18 Move to the intersection of the contact groove 601 and the parallel groove 602. At this time, the two absorbent cottons 16 wrap the cable, so as to facilitate the absorption of water on the surface of the cable. When the round rod 18 slides in the parallel groove 602, the absorbent cotton 16 slides on the surface of the cable, which is beneficial to the drying of the cable. Finally, when the round rod 18 slides in the extrusion groove 603, the extrusion plate 15 squeezes the absorbent cotton 16 to discharge the water in the absorbent cotton 16, avoiding the absorbent cotton 16 absorbing too much water and causing the water on the cable surface to not be absorbed cleanly, which is beneficial to the drying of the cable.

[0018] In the present invention, the driving mechanism includes a strip frame 24 arranged at the movable end of the electric push rod 12, a movable block 22 slidably arranged in the strip frame 24, and a second squeezing spring 23, and the second squeezing spring 23 is located at one end close to the electric push rod 12. Through the use of the second squeezing spring 23, it is convenient to squeeze the movable block 22, so that the movable block 22 moves synchronously with the strip frame 24; a connecting rod 11 fixedly connected to the annular ring 10 is provided on the top surface of the movable block 22, and a strip tooth plate 25 matching the gear 9 is fixedly connected to the bottom surface of the strip frame 24.

[0019] In the present invention, the wiper mechanism includes a strip plate 21 threadedly connected to the outer wall of the screw rod 14, and the strip plate 21 is slidably arranged with the inner wall of the collection box 5. A strip opening 26 is provided on the bottom surface of the strip plate 21, and a scraper 28 is slidably arranged in the strip opening 26. Short cylinders 27 are fixedly connected to the two side surfaces of the scraper 28. An adjusting member 17 is provided on the inner wall of the collection box 5 to cooperate with the short cylinder 27. Through the use of the adjusting member 17, the scraper 28 can be in close contact with the inner wall and bottom surface of the collection box 5 during operation, thereby facilitating the discharge of water in the collection box 5 and avoiding water residue; when the scraper 28 is reset, it can be separated from the bottom surface of the collection box 5 to ensure that the water in the collection box 5 is discharged in one direction, which is conducive to the discharge of water.

[0020] In the present invention, the second adjusting member 17 includes a wiper groove 1701 provided on the inner wall of the collection box 5, a return groove 1702 is provided on the inner wall of the collection box 5 above the wiper groove 1701, both ends of the wiper groove 1701 and the return groove 1702 are connected through an inclined groove 1703, and the two inclined grooves 1703 are parallel to each other, and a stopper is provided in the inclined groove 1703, wherein the short cylinder 27 moves in the wiper groove 1701, at this time, the scraper 28 is in close contact with the inner bottom surface of the collection box 5, so as to facilitate the pushing of water in the collection box 5, so as to for the discharge of water; when the short cylinder 27 moves in the return groove 1702, the scraper 28 is separated from the collecting box 5 to prevent water from being brought back, thereby ensuring that the water is discharged in one direction, which is conducive to the discharge of water; and a circular loop is formed between the wiper groove 1701, the return groove 1702 and the inclined groove 1703 to facilitate the reciprocating movement of the short cylinder 27, and further facilitate the reciprocating movement of the scraper 28; through the use of the limiter, it is convenient to limit the short cylinder 27 to ensure that the short cylinder 27 enters the wiper groove 1701 or the return groove 1702.

[0021] In the present invention, the limit member includes a rectangular cavity 30 opened on the inner wall of the inclined groove 1703, a limit block 29 is slidably provided in the rectangular cavity 30, and an extrusion spring 31 is provided between the limit block 29 and the rectangular cavity 30, which is used to squeeze the limit block 29, thereby facilitating the automatic resetting of the limit block 29; wherein, the opposite surface of the limit block 29 and the moving direction of the short cylinder 27 is an inclined surface, so that the short cylinder 27 can push the limit block 29 into the rectangular cavity 30 when moving, and the short cylinder 27 cannot move back through the limit block 29, thereby ensuring that the short cylinder 27 moves in a certain direction.

[0022] Working principle: When the present invention is used, the cable is produced by the extruder 4, and then the produced cable is put into the water in the cooling box 3 to achieve the cooling of the cable, and then the cable is passed between two water-absorbing cottons 16, and finally the cable is set on the cable winding device to achieve the winding of the cable; Then, the electric push rod 12 is opened, wherein the movable end of the electric push rod 12 moves from the initial position (recorded as point A) to the one-sixth position (recorded as point B), the movable end of the electric push rod 12 moves to the two-sixth position (recorded as point C), the movable end of the electric push rod 12 moves to the three-sixth position (recorded as point D), and the movable end of the electric push rod 12 is fully extended (recorded as point E); The moving end of the electric push rod 12 is extended to drive the bar frame 24 to move, and the movement of the bar frame 24 is divided into two situations: Case 1: Under the action of the second extrusion spring 23, the movable block 22 moves synchronously with the bar frame 24, thereby driving the connecting rod 11 to move, thereby driving the annular ring 10 to move; When the movable end of the electric push rod 12 moves from point A to point B, at this time, under the action of the contact groove 601, the circular rod 18 moves relatively, and then the rectangular box 8 moves relatively under the action of the extrusion spring 20, and further the absorbent cotton 16 moves relatively. When the circular rod 18 moves to the bottom end of the contact groove 601, the absorbent cotton 16 wraps the cable; The movable end of the electric push rod 12 moves from point B to point C. At this time, the round rod 18 moves in the parallel groove 602, thereby making the absorbent cotton 16 slide on the surface of the cable to absorb water on the surface of the cable, thereby facilitating the drying of the cable; When the movable end of the electric push rod 12 moves from point C to point D, the circular rod 18 moves along the extrusion groove 603, thereby driving the extrusion plate 15 to move relatively, thereby squeezing the absorbent cotton 16, facilitating the discharge of water in the absorbent cotton 16, and avoiding excessive water in the absorbent cotton 16 affecting the water absorption performance of the absorbent cotton 16, thereby facilitating the drying of the cable; At the same time, when the circular rod 18 moves to the lowest end of the extrusion groove 603, at this time, the bar-shaped tooth plate 25 is meshed with the gear 9; Process 2: As the bar frame 24 continues to move, the bar tooth plate 25 will continue to move, and then the gear 9 will rotate, thereby driving the bar plate 21 to move. At this time, under the action of the limit block 29, the short cylinder 27 moves along the scraper groove 1701, so that the scraper 28 contacts the bottom surface of the collection box 5. The scraper 28 moves in the collection box 5 to scrape the water in the collection box 5, avoiding residual water in the collection box 5, which is convenient for water recovery; When the movable end of the electric push rod 12 is completely extended, the short cylinder 27 passes through the limit block 29 and moves into the return groove 1702. At this time, the scraper 28 is separated from the collection box 5 to prevent the scraper 28 from scraping water when it is reset, thereby ensuring that the water is discharged in a certain direction, which is conducive to the discharge of water; Finally, when the movable end of the electric push rod 12 moves to point D, the short cylinder 27 moves into the wiper groove 1701 under the action of the limit block 29; According to the above operation, the extension amount of the movable end of the electric push rod 12 is controlled according to the required steps, so as to achieve the drying of the cable surface, the squeezing of the absorbent cotton 16 and the discharge of water.

[0023] The above description of the embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An extrusion device for cable production and processing, comprising a bottom plate (1), a base (2), a cooling box (3) and an extruder (4), characterized in that: Vertical plates (7) are symmetrically arranged on one side surface of the cooling box (3), and water absorption mechanisms are symmetrically arranged between the vertical plates (7); A collecting box (5) is fixedly connected to the bottom surface of the vertical plate (7), a screw rod (14) is rotatably provided in the collecting box (5), a wiper mechanism is provided in the screw rod (14), and a gear (9) is fixedly connected to one end of the screw rod (14); A mounting plate (13) is fixedly connected to the rear end surface of the cooling box (3), an electric push rod (12) is provided on the mounting plate (13), and a driving mechanism that first acts on a water absorption mechanism and then acts on a gear (9) is provided on the movable end of the electric push rod (12).

2. The extrusion device for cable production and processing according to claim 1, characterized in that: The water absorbing mechanism comprises a rectangular box (8) symmetrically slidably arranged between the vertical plates (7), a squeezing plate (15) slidably arranged in the rectangular box (8), and a water absorbing cotton (16) arranged on the squeezing plate (15); both ends of the rectangular box (8) are provided with rectangular openings (19); both ends of the squeezing plate (15) are provided with round rods (18) matching with the rectangular openings (19); a squeezing spring (20) is provided between the round rod (18) and the rectangular opening (19); an adjusting member (6) matching with the round rod (18) is symmetrically provided on the vertical plates (7); an annular ring (10) is slidably arranged on one of the vertical plates (7); one end of the round rod (18) movably passes through the adjusting member (6) and extends into the annular ring (10).

3. The extrusion device for cable production and processing according to claim 2, characterized in that: The adjusting member 1 (6) comprises a contact groove (601) formed on the vertical plate (7), a parallel groove (602) formed at one end of the contact groove (601), an extrusion groove (603) formed at one end of the parallel groove (602), and the circular rod (18) is slidably arranged with the contact groove (601), the parallel groove (602) and the extrusion groove (603).

4. The extrusion device for cable production and processing according to claim 3, characterized in that: The driving mechanism comprises a strip frame (24) arranged at the movable end of the electric push rod (12), a movable block (22) slidably arranged in the strip frame (24) and a second extrusion spring (23), wherein the second extrusion spring (23) is located at one end close to the electric push rod (12), a connecting rod (11) fixedly connected to the annular ring (10) is provided on the top surface of the movable block (22), and a strip tooth plate (25) matched with the gear (9) is fixedly connected to the bottom surface of the strip frame (24).

5. The extrusion device for cable production and processing according to claim 1, characterized in that: The wiper mechanism comprises a strip plate (21) threadedly connected to the outer wall of the screw rod (14), and the strip plate (21) is slidably arranged with the inner wall of the collection box (5), a strip opening (26) is provided on the bottom surface of the strip plate (21), a scraper (28) is slidably arranged in the strip opening (26), short cylinders (27) are fixedly connected to the two side surfaces of the scraper (28), and an adjustment member (17) is provided on the inner wall of the collection box (5) to cooperate with the short cylinder (27).

6. The extrusion device for cable production and processing according to claim 5, characterized in that: The second adjusting member (17) comprises a wiper groove (1701) provided on the inner wall of the collection box (5); a return groove (1702) is provided on the inner wall of the collection box (5) above the wiper groove (1701); both ends of the wiper groove (1701) and the return groove (1702) are connected via an inclined groove (1703); the two inclined grooves (1703) are parallel to each other; and a stopper is provided in the inclined groove (1703).

7. The extrusion device for cable production and processing according to claim 6, characterized in that: The limiting member comprises a rectangular cavity (30) formed on the inner wall of the inclined groove (1703), a limiting block (29) being slidably disposed in the rectangular cavity (30), and a compression spring (31) being disposed between the limiting block (29) and the rectangular cavity (30).

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