CN115979856A

CN115979856A - Reciprocating type bending simulation test device for coaxial cable

Info

Publication number: CN115979856A
Application number: CN202310033203.XA
Authority: CN
Inventors: 李万松; 丁运生; 闵泽宇; 朱峰林; 刘虎; 李兵; 王学超
Original assignee: Anhui Lingyu Cable Technology Co Ltd
Current assignee: Anhui Lingyu Cable Technology Co Ltd
Priority date: 2023-01-10
Filing date: 2023-01-10
Publication date: 2023-04-18

Abstract

The invention discloses a reciprocating type bending simulation test device for a coaxial cable, which relates to the technical field of cable detection and comprises a fixed bottom plate, wherein the top of the fixed bottom plate is fixedly connected with a bending assembly for cable deformation, the bending assembly consists of a rotating disc with a threaded window, swinging assemblies are arranged on two sides of the bending assembly, and the top of the swinging assembly is fixedly connected with a fixed assembly.

Description

Reciprocating type bending simulation test device for coaxial cable

Technical Field

The invention relates to the technical field of cable detection, in particular to a reciprocating type bending simulation test device for a coaxial cable.

Background

A coaxial cable is a wire and signal transmission line, generally made of four layers of materials: the most inner is a conductive copper wire, the outside of the wire is surrounded by a layer of plastic (used as an insulator and a dielectric medium), the outside of the insulator is also provided with a layer of thin reticular conductor (generally copper or alloy), then the outside of the conductor is the outermost layer of insulating material as the outer skin, for the production and use factories of quality supervision industry, metal and mechanical industry, cable and wire and the like, the metal wires such as coaxial cables and the like need to be subjected to repeated bending test after production to detect the performance of bearing plastic deformation and the displayed defects;

the following problems exist in the prior art:

under the prior art, when the bending device is used for bending the coaxial cable, the bending angle of the cable is unchanged when the bending device is used for bending the coaxial cable, the radian of the bent state of the cable is not changed, and the uncertainty of deformation and bending of the cable in daily practice cannot be embodied.

Disclosure of Invention

The present invention is directed to a reciprocating bending simulation test device for coaxial cables, so as to solve the problems in the background art.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention provides a reciprocating type bending simulation test device for a coaxial cable, which comprises a fixed base plate, wherein the top of the fixed base plate is fixedly connected with a bending component for cable deformation, two sides of the bending component are respectively provided with a swinging component matched with the bent cable, the bottom of the swinging component is fixedly connected with two ends of the fixed base plate, and the top of the swinging component is fixedly connected with a fixed component for connecting two ends of the cable.

Preferably, the bending assembly comprises a first mounting seat used for connecting a matching device, the bottom of the first mounting seat is fixedly connected with the middle of the fixed base plate, a first mounting frame penetrating through the first mounting seat is arranged on the surface of the first mounting seat, a rotating disc used for bending the cable is arranged in the first mounting frame, and a threaded window penetrating through the rotating disc is arranged on the surface of the rotating disc.

Preferably, a plurality of teeth that are used for connecting first servo motor are seted up all around to the rolling disc, first servo motor sets up in first mount pad one side, first servo motor bottom and PMKD fixed connection, first servo motor output is connected with the rolling disc through the built-in transmission device of first mount pad, first mount pad one side fixedly connected with carries out spacing first limiting plate to the cable, first limiting plate top is greater than the rolling disc center in vertical direction.

Preferably, the swing assembly comprises two second installation seats used for forming first installation grooves, the bottoms of the second installation seats are fixedly connected with the two ends of the fixed base plate, the second installation seats are symmetrically distributed along the axis of the fixed base plate, the first installation grooves are arc-shaped, and a plurality of tooth grooves which are uniformly arranged are formed in the groove surfaces of the first installation grooves.

Preferably, first mounting groove face edge fixedly connected with is used for installing the arc frame of gear, arc frame top both sides fixedly connected with prevents that the gear breaks away from the second limiting plate of self, the arc through-hole of the fixed dwang of being convenient for is seted up to arc frame both sides, arc through-hole bottom has been seted up and has been prevented second servo motor pivoted sliding tray.

Preferably, be provided with the third mount pad that is used for installing fixed subassembly in the arc frame, third mount pad both sides and arc frame inner wall sliding connection, the second mounting groove that is used for fixed gear is offered to third mount pad bottom, the gear passes through the dwang and is connected with second mounting groove cell wall rotation, the third mounting groove that is used for connecting the primary shaft is offered at third mount pad top, primary shaft and third mounting groove tank bottom fixed connection, two connecting plates that are used for connecting fixed subassembly of one side fixedly connected with that PMKD center was kept away from to the third mount pad.

Preferably, gear and tooth's socket phase-match, the gear is connected with the tooth's socket meshing, the arc through-hole inner wall sliding connection of dwang and arc frame both sides, the dwang is close to the one end fixedly connected with at PMKD center and is used for driving self pivoted second servo motor, second servo motor bottom fixedly connected with is used for stabilizing the slide bar of self, the slide bar is kept away from second servo motor's one end and the slide groove cell wall sliding connection on arc frame surface.

Preferably, the fixed subassembly includes two fourth mount pads that are used for installing the connecting sleeve, two the fourth mount pad is close to PMKD's one side and connecting plate fixed connection, the one side fixedly connected with that the fourth mount pad is close to PMKD center is used for installing expanding spring's connecting sleeve, expanding spring one end and connecting sleeve inner chamber bottom fixed connection, the one end fixedly connected with that connecting sleeve was kept away from to expanding spring is used for installing the installing sleeve of grip block.

Preferably, installation sleeve inner wall fixedly connected with is used for rotating the second bearing of grip block, second bearing inner wall fixedly connected with is used for connecting the collar of grip block, a plurality of fourth mounting grooves that are used for installing reset spring are seted up to the collar inner wall, and are a plurality of the fourth mounting groove is around installation ring axis evenly distributed, reset spring one end and fourth mounting groove tank bottom fixed connection, reset spring other end and grip block fixed connection, the grip block outside is seted up the inclined plane that triggers that the cable of being convenient for got into, the sharp distance that triggers inclined plane and collar evenly increases along the direction of the directional fourth mount pad of first mount pad, and is a plurality of the terminal surface fixedly connected with that the grip block is close to each other is used for promoting the friction disc of self and cable contact force.

Compared with the prior art, the above one or more technical schemes have the following beneficial effects:

the invention provides a rotating disc with a spiral window, which is matched with a swinging assembly, a cable is matched with a limiting plate under the extrusion of the edge of the spiral window to be far away from the center of the rotating disc, the radian of the cable is changed under the fixation of a clamping ring at two ends of the cable, after the cable reaches the edge of the rotating disc, a servo motor drives the rotating disc to rotate reversely, the cable is stressed to be close to the center of the rotating disc, the arc angle is changed, the angle of the cable is uniformly changed in the whole process, the angle is continuously increased or reduced, the swinging assembly is matched with a bending assembly to further change the radian of the cable, so that the whole bending and swinging of the cable in an experiment are more sufficient, the bending change of the cable in the experiment process is in accordance with the condition that the cable can meet in practical use, and the bending simulation experiment result is more accurate.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are included to illustrate an exemplary embodiment of the invention and not to limit the invention.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the flexure assembly of the present invention;

FIG. 3 is a schematic illustration of the position of the securing assembly of the present invention;

FIG. 4 is a schematic view of the position of the wobble assembly of the present invention;

FIG. 5 is an enlarged view of the structure of FIG. 4A according to the present invention;

FIG. 6 is a schematic view of the gullet configuration of the present invention;

FIG. 7 is a schematic view of the wobble assembly of the present invention;

FIG. 8 is a schematic view of the kinematic seat of the present invention;

fig. 9 is a schematic structural view of the fixing assembly of the present invention.

Fig. 10 is an enlarged view of the structure of fig. 9 at B according to the present invention.

In the figure:

1. fixing the bottom plate; 2. a bending assembly; 21. a first mounting seat; 22. a first mounting frame; 23. rotating the disc; 24. a threaded window; 25. teeth; 26. a first servo motor; 27. a first limit plate; 3. a rocking assembly; 31. a second mounting seat; 311. a first mounting groove; 312. a tooth socket; 32. an arc frame; 321. a second limiting plate; 322. an arc-shaped through hole; 323. a sliding groove; 33. a third mounting seat; 331. a second mounting groove; 332. a gear; 333. rotating the rod; 334. a third mounting groove; 335. a first bearing; 336. a connecting plate; 34. a second servo motor; 341. a slide bar; 4. a fixing assembly; 41. a fourth mounting seat; 42. a connecting sleeve; 43. a tension spring; 44. installing a sleeve; 441. a second bearing; 442. a mounting ring; 443. a fourth mounting groove; 444. a return spring; 445. a clamping plate; 446. triggering the inclined plane; 447. a friction plate.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1-10, the invention provides a reciprocating type bending simulation test device for a coaxial cable, which comprises a fixed base plate 1, and please refer to fig. 1, wherein a bending component 2 for cable deformation is fixedly connected to the top of the fixed base plate 1, the bending component 2 is composed of a rotating disc 23 with a threaded window 24, a cable bending experiment is performed in operation, swing components 3 matched with the bent cable are arranged on two sides of the bending component 2, the swing components 3 and the bending component 2 are matched to further change the radian of the cable, so that the cable can be deformed and swung fully in the experiment, the cable can be fitted with the conditions met in actual use, the bottom of the swing component 3 is fixedly connected with two ends of the fixed base plate 1, the top of the swing component 3 is fixedly connected with fixed components 4 used for connecting two ends of the cable, and the fixed components 4 fix two ends of the cable, so as to ensure that the cable can not be separated from the whole device.

Please refer to fig. 2, the bending assembly 2 includes a first mounting seat 21 for connecting a matching device, the bottom of the first mounting seat 21 is fixedly connected with the middle of the fixed base plate 1, a first mounting frame 22 penetrating through the first mounting seat 21 is disposed on the surface of the first mounting seat 21, a rotating disc 23 for bending the cable is disposed in the first mounting frame 22, the rotating disc 23 rotates around its axis under the driving of a first servo motor 26, a threaded window 24 penetrating through the first mounting seat 23 starts on the surface of the rotating disc 23, the threaded window 24 keeps synchronous motion with the rotating disc 23 when the rotating disc 23 rotates, one end of the cable is fixed on the fixed assembly 4, the middle of the cable is inserted into the threaded window 24, and the cable further keeps synchronous motion with the rotating disc 23 when the rotating disc 23 rotates, so that the cable is deformed and swung more fully in the experiment, and is attached to the situation that the cable can meet in practical use.

Please refer to fig. 2 and fig. 3, a plurality of teeth 25 for connecting a first servo motor 26 are formed around the rotating disc 23, the teeth 25 are matched with a transmission device inside the first mounting seat 21, after the first servo motor 26 is started, the first servo motor 26 drives the rotating disc 23 to rotate around its own axis, the first servo motor 26 is disposed on one side of the first mounting seat 21, the bottom of the first servo motor 26 is fixedly connected with the fixed base plate 1, and the stability is higher, an output end of the first servo motor 26 is connected with the rotating disc 23 through the transmission device built in the first mounting seat 21, the first servo motor 26 drives the rotating disc 23 to rotate around its own axis through the transmission device, a first limiting plate 27 for limiting a cable is fixedly connected to one side of the first mounting seat 21, the top of the first limiting plate 27 is larger than the center of the rotating disc 23 in the vertical direction, when the cable and the rotating disc 23 keep synchronous movement, the cable contacts with the first limiting plate 27 when reaching the bottom of the rotating disc 23, the cable can only travel along the edge of the threaded window 24, the threaded window 24 is in a spiral structure, the cable rotates with the rotating disc 23, and the arc of the cable is more and the cable is not changed, and vice versa, and the overall bending process is guaranteed.

Please refer to fig. 3 and 4, the swing module 3 includes two second installation seats 31 for forming a first installation groove 311, the bottom of the second installation seat 31 is fixedly connected to two ends of the fixed base plate 1, the second installation seats 31 on two sides are symmetrically distributed along the axis of the fixed base plate 1 to fix two ends of the cable, when the swing module 3 is started, the operation radians of the two ends are kept synchronous, the first installation groove 311 is arc-shaped, the groove surface of the first installation groove 311 is formed with a plurality of uniformly arranged tooth spaces 312, the gear 332 at the bottom of the third installation seat 33 is matched with the tooth spaces 312, after the second servo motor 34 is started, the fixing devices at the tops of the drive gear 332 and the gear 332 perform arc-shaped repeated operation along the tooth spaces 312, and are matched with the bending module 2 to make the cable bend and deform more fully in the experiment process.

Please refer to fig. 5 and fig. 6, the edge of the groove surface of the first mounting groove 311 is fixedly connected with the arc-shaped frame 32 for mounting the gear 332, the gear 332 moves in the arc-shaped frame 32, two sides of the top of the arc-shaped frame 32 are fixedly connected with the second limiting plate 321 for preventing the gear 332 from separating from the second limiting plate, when the gear 332 and the cable of the fixing component 4 at the top run to the edge of the arc-shaped frame 32, the gear 332 and the cable do not separate from the arc-shaped frame 32 under the blocking of the second limiting plate 321, so as to ensure the subsequent running. Arc through-hole 322 that the fixed dwang 333 of being convenient for was seted up to arc frame 32 both sides, dwang 333 slides and moves along the edge in arc through-hole 322, arc through-hole 322 bottom is seted up and is prevented second servo motor 34 pivoted sliding tray 323, and the dwang 333 of second servo motor 34 one side slides along sliding tray 323, when preventing that second servo motor 34 from starting, and self can take place to deflect to lead to second servo motor 34 can not drive the gear 332 rotation of output again.

Please refer to fig. 7 and 8, a third mounting seat 33 for mounting the fixing component 4 is disposed in the arc frame 32, two sides of the third mounting seat 33 are slidably connected to an inner wall of the arc frame 32, a second mounting groove 331 for fixing the gear 332 is disposed at the bottom of the third mounting seat 33, the gear 332 is rotatably connected to a groove wall of the second mounting groove 331 through a rotating rod 333, after the second servo motor 34 is started, the fixing devices at the tops of the driving gear 332 and the gear 332 perform arc-shaped repeated operation along the tooth space 312, and cooperate with the bending component 2 to make the bending deformation of the cable more sufficient during the experiment, a third mounting groove 334 for connecting the first bearing 335 is disposed at the top of the third mounting seat 33, the first bearing 335 is fixedly connected to a groove bottom of the third mounting groove 334, two ends of the cable pass through the first bearing 335 to be fixed in the fixing component 4, so as to ensure that the two ends of the cable also keep rotating during the rotation, and the two ends of the cable do not rotate because the two ends of the cable contact with the top of the second fixing component 4, thereby damaging the cable, one side of the third mounting seat 33 far from the center of the fixing base plate 1 is fixedly connected to two connecting plates 336 of the fixing component 4, and the fixing component, and the two ends of the cable pass through the fixing component 335.

Please refer to fig. 5 and fig. 7, the gear 332 is matched with the tooth slot 312, the gear 332 is engaged with the tooth slot 312, the rotating rod 333 is slidably connected with the inner wall of the arc through hole 322 at two sides of the arc frame, one end of the rotating rod 333 near the center of the fixed bottom plate 1 is fixedly connected with the second servo motor 34 for driving the self to rotate, the gear 332 at the bottom of the third mounting seat 33 is matched with the tooth slot 312, after the second servo motor 34 is started, the fixing device at the top of the driving gear 332 and the gear 332 performs the arc repeated operation along the tooth slot 312, the bottom of the second servo motor 34 is fixedly connected with the sliding rod 341 for stabilizing the self, one end of the sliding rod 341 far from the second servo motor 34 is slidably connected with the groove wall of the sliding groove 323 on the surface of the arc frame, the rotating rod at one side of the second servo motor 34 slides along the sliding groove 323, thereby preventing the self from deflecting when the second servo motor 34 is started, and ensuring the subsequent normal operation of the back-and forth swinging.

Please refer to fig. 8 and 9, the fixing assembly 4 includes two fourth mounting seats 41 for mounting the connecting sleeve 42, one side of the two fourth mounting seats 41 close to the fixing base plate 1 is fixedly connected to the connecting plate 336, one side of the fourth mounting seat 41 close to the center of the fixing base plate 1 is fixedly connected to the connecting sleeve 42 for mounting the expansion spring 43, one end of the expansion spring 43 is fixedly connected to the bottom of the inner cavity of the connecting sleeve 42, one end of the expansion spring 43 far from the connecting sleeve 42 is fixedly connected to the mounting sleeve 44 for mounting the clamping plate 445, when the cable is changed in arc under the action of the bending assembly 2, the two ends of the cable are stretched, the cable is stressed to generate a stretching force to the mounting sleeve 44, and then the connecting sleeve 42 is pulled, the return spring 444 is lengthened or shortened under the cable stretching force, so as to meet the requirement that the cable is in arc shape, the cable is not broken as a whole due to the fixation of the two ends.

Please refer to fig. 9 and 10, the inner wall of the mounting sleeve 44 is fixedly connected with a second bearing 441 for rotating the clamping plate 445, the inner wall of the second bearing 441 is fixedly connected with a mounting ring 442 for connecting the clamping plate 445, two ends of the cable pass through the first bearing 335 and extend to the clamping plate 445 in the mounting ring 442 for fixing, so as to ensure that the two ends of the cable can keep rotating when the middle part of the cable rotates, and the cable can not be damaged because the two ends of the cable contact with the top of the second fixing seat, the inner wall of the mounting ring 442 is provided with a plurality of fourth mounting grooves 443 for mounting the return spring 444, the plurality of fourth mounting grooves 443 are uniformly distributed around the axis of the mounting ring 442, so as to ensure that the end of the cable is tightly fixed in the mounting ring 442, one end of the return spring 444 is fixedly connected with the bottom of the fourth mounting groove 443, reset spring 444 other end and grip block 445 fixed connection, the grip block 445 outside is seted up the trigger inclined plane 446 that is convenient for the cable to get into, the straight-line distance of trigger inclined plane 446 and collar 442 evenly increases along the directional fourth mount block 41's of first mount block 21 direction, when the cable inserts between the grip block 445, the cable end is one step earlier with trigger inclined plane 446 contact, extrusion trigger inclined plane 446, the grip block and then the reset spring 444 of extrusion bottom, the tip of cable can get into and fix between the friction disc 447, the terminal surface fixedly connected with that a plurality of grip blocks 445 are close to each other is used for promoting self and the friction disc 447 of cable contact force, friction disc 447 is flexible rubber and constitutes, cooperation reset spring 444 fixes the cable end, guarantee that the cable can not break away from fixed subassembly 4, be convenient for going on of follow-up experiment.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a reciprocating type bending simulation test device of coaxial cable, its characterized in that, includes PMKD (1), PMKD (1) top fixedly connected with is used for crooked subassembly (2) of cable deformation, crooked subassembly (2) both sides all are provided with the subassembly (3) that sways of cooperation self crooked cable, sway subassembly (3) bottom and PMKD (1) both ends fixed connection, it is used for connecting fixed subassembly (4) at cable both ends to sway subassembly (3) top fixedly connected with.

2. The reciprocating type bending simulation test device for the coaxial cable according to claim 1, wherein the bending assembly (2) comprises a first mounting seat (21) for connecting a matching device, the bottom of the first mounting seat (21) is fixedly connected with the middle of the fixed bottom plate (1), a first mounting frame (22) penetrating through the first mounting seat (21) is arranged on the surface of the first mounting seat (21), a rotating disc (23) for bending the coaxial cable is arranged in the first mounting frame (22), and a threaded window (24) penetrating through the rotating disc (23) is arranged on the surface of the rotating disc.

3. The reciprocating type bending simulation test device for the coaxial cable according to claim 2, wherein a plurality of teeth (25) for connecting a first servo motor (26) are formed around the rotating disc (23), the first servo motor (26) is arranged on one side of the first mounting seat (21), the bottom of the first servo motor (26) is fixedly connected with the fixed base plate (1), the output end of the first servo motor (26) is connected with the rotating disc (23) through a transmission device arranged in the first mounting seat (21), a first limiting plate (27) for limiting the cable is fixedly connected on one side of the first mounting seat (21), and the top of the first limiting plate (27) is larger than the center of the rotating disc (23) in the vertical direction.

4. The reciprocating type bending simulation test device for the coaxial cable according to claim 1, wherein the swinging assembly (3) comprises two second installation seats (31) for forming a first installation groove (311), the bottoms of the second installation seats (31) are fixedly connected with two ends of the fixed bottom plate (1), the second installation seats (31) on two sides are symmetrically distributed along the axis of the fixed bottom plate (1), the first installation groove (311) is arc-shaped, and a plurality of tooth grooves (312) are formed in the groove surface of the first installation groove (311) and are uniformly arranged.

5. The reciprocating bending simulation test device for coaxial cables as recited in claim 4, wherein the edge of the groove surface of the first mounting groove (311) is fixedly connected with an arc frame (32) for mounting the gear (332), the two sides of the top of the arc frame (32) are fixedly connected with a second limiting plate (321) for preventing the gear (332) from separating from the gear, the two sides of the arc frame (32) are provided with arc through holes (322) for fixing the rotating rod (333) conveniently, and the bottom of the arc through holes (322) is provided with a sliding groove (323) for preventing the second servo motor (34) from rotating.

6. The reciprocating bending simulation test device for coaxial cables as recited in claim 5, wherein a third mounting seat (33) for mounting the fixed component (4) is disposed in the arc frame (32), two sides of the third mounting seat (33) are slidably connected to an inner wall of the arc frame (32), a second mounting groove (331) for fixing the gear (332) is formed at a bottom of the third mounting seat (33), the gear (332) is rotatably connected to a groove wall of the second mounting groove (331) through a rotating rod (333), a third mounting groove (334) for connecting the first bearing (335) is formed at a top of the third mounting seat (33), the first bearing (335) is fixedly connected to a groove bottom of the third mounting groove (334), and two connecting plates (336) for connecting the fixed component (4) are fixedly connected to a side of the third mounting seat (33) away from a center of the fixed base plate (1).

7. The reciprocating bending simulation test device for the coaxial cable according to claim 6, wherein the gear (332) is matched with the tooth slot (312), the gear (332) is engaged with the tooth slot (312), the rotating rod (333) is slidably connected with the inner walls of the arc-shaped through holes (322) at two sides of the arc-shaped frame, one end of the rotating rod (333) close to the center of the fixed bottom plate (1) is fixedly connected with a second servo motor (34) for driving the rotating rod to rotate, the bottom of the second servo motor (34) is fixedly connected with a sliding rod (341) for stabilizing the rotating rod, and one end of the sliding rod (341) far away from the second servo motor (34) is slidably connected with the groove wall of the sliding groove (323) on the surface of the arc-shaped frame.

8. The reciprocating type bending simulation test device for the coaxial cable according to claim 1, wherein the fixing assembly (4) comprises two fourth mounting seats (41) for mounting the connecting sleeve (42), one surfaces of the two fourth mounting seats (41) close to the fixed base plate (1) are fixedly connected with the connecting plate (336), one surfaces of the fourth mounting seats (41) close to the center of the fixed base plate (1) are fixedly connected with the connecting sleeve (42) for mounting the extension spring (43), one end of the extension spring (43) is fixedly connected with the bottom of the inner cavity of the connecting sleeve (42), and one end of the extension spring (43) far away from the connecting sleeve (42) is fixedly connected with the mounting sleeve (44) for mounting the clamping plate (445).

9. The reciprocating bending simulation test device for the coaxial cable according to claim 8, wherein a second bearing (441) for rotating the clamping plate (445) is fixedly connected to an inner wall of the mounting sleeve (44), a mounting ring (442) for connecting the clamping plate (445) is fixedly connected to an inner wall of the second bearing (441), a plurality of fourth mounting grooves (443) for mounting the return spring (444) are formed in the inner wall of the mounting ring (442), the plurality of fourth mounting grooves (443) are uniformly distributed around an axis of the mounting ring (442), one end of the return spring (444) is fixedly connected to a groove bottom of the fourth mounting groove (443), the other end of the return spring (444) is fixedly connected to the clamping plate (445), a trigger inclined surface (446) for facilitating entry of the cable is formed outside the clamping plate (445), a linear distance between the trigger inclined surface (446) and the mounting ring (442) is uniformly increased along a direction pointing to the fourth mounting seat (41) of the first mounting seat (21), and a contact force (447) for increasing a contact force between the friction plate and the cable and the friction plate (445) is fixedly connected to an end face, which the clamping plate (445) are close to each other.