High-precision stainless steel synchronous rotating steel wire rope

Abstract

The invention relates to the technical field of steel wire ropes, in particular to a high-precision stainless steel synchronous rotating steel wire rope which comprises a steel wire rope body and a traction part arranged at the head of the steel wire rope body, the steel wire rope body is composed of a plurality of steel wire rope units twisted together, and polyurethane connectors are welded to the ends of the steel wire rope body after being welded. The traction piece comprises a traction seat and a traction ring which is located at one end of the traction piece and integrated with the traction piece, the polyurethane connector is rotationally connected in the traction cavity, and a sinking cavity is formed in the other end, away from the steel wire rope unit, of the polyurethane connector. A linear section extending part is arranged at the joint of the traction seat and the traction ring, the traction seat is fed into the traction cavity through a plurality of ring grooves in the polyurethane connector, so that the cavity wall of the traction cavity is automatically lubricated, when traction work is carried out, if torsion is generated, it is guaranteed that the polyurethane connector rotates in the traction cavity to eliminate the torsion, and the traction efficiency is improved. And the clamping phenomenon is avoided when the torsion is generated.

Description

Technical Field

[0001] The invention relates to the technical field of steel wire ropes, and in particular to a high-precision stainless steel synchronous rotating steel wire rope. Background Art

[0002] Synchronous rotating wire rope is a specially designed wire rope, mainly used in situations where rotation and torque need to be reduced. Its characteristic is that the wire rope can maintain synchronous rotation when subjected to tension, avoiding equipment damage or inconvenience in operation caused by rotation. In order to improve its strength, in most cases, the synchronous rotating wire rope is made of stainless steel wire twisted together, and the surface is polished and ground, which has good abrasive resistance and extends its service life.

[0003] When the synchronous rotating wire rope is used for traction, its rotating part is prone to heat up, and it is also prone to rust as the outer oxide scale rotates and falls off. The traction force is large. If the rotating structure is unreasonable, it will cause stress concentration at the rotating part of the wire rope, and there is a risk of breaking when traction and dragging. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a high-precision stainless steel synchronous rotating wire rope, including a wire rope body and a traction piece arranged at the head of the wire rope body, the wire rope body is composed of a wire rope unit with multiple strands twisted together, and their ends are welded and fused with a polyurethane connector, the traction piece includes a traction seat and a traction ring located at one end of the traction piece and integrated with the traction piece, a traction cavity is provided in the traction seat, the polyurethane connector is transferred into the traction cavity, a sink cavity is provided on the other end of the polyurethane connector away from the wire rope unit, a straight line segment extension is provided at the connection between the traction seat and the traction ring, a step portion is formed between the straight line segment extension and the traction cavity, an extrusion surface is provided on the side of the step portion facing the sink cavity, a polyurethane elastic A seat, the other end of the polyurethane elastic seat is provided with a supporting part, the supporting part extends out of the sinking cavity, and under the supporting action of the supporting part, an active space is formed between the polyurethane connector and the extrusion surface, the active space is filled with a rubber sleeve, the rubber sleeve is provided with a rubber hose, the rubber sleeve is filled with lubricating oil, the outer cylindrical surface of the polyurethane connector is close to the cavity wall of the traction cavity, the rubber hose enters the polyurethane connector and communicates with the outer cylindrical surface of the polyurethane connector, a core rope is twisted in the steel wire rope body at the same time, a channel is opened in the straight segment extension part, one end of the channel is communicated with the traction cavity, and the other end of the channel is communicated with the hanging hole of the traction ring, the hanging hole of the traction ring is provided with a core ring, the core rope passes through the channel into the hanging hole of the traction ring and is welded to the core ring.

[0005] As a further preference, the towing seat is composed of a first part integrally formed on the straight section extension part and a second part detachably assembled on the first part.

[0006] As a further preference, the outer surfaces of the first part and the second part are elliptical surfaces, and the elliptical surfaces cover the peripheral range of the towing cavity.

[0007] As a further preference, the core rope is formed by twisting multiple core rope units. When the steel wire rope body is twisted by multiple steel wire rope units, the core rope units are engaged between the multiple steel wire rope units. Both the core rope and the steel wire rope body pass through the polyurethane connector and are welded inside the polyurethane connector.

[0008] As a further preference, a number of annular grooves are provided along the length direction on the outer circumferential surface of the polyurethane connector. A number of heat dissipation holes are provided on the towing seat. The heat dissipation holes are distributed outside the annular grooves and communicate with the annular grooves inside and outside. The heat dissipation holes are tapered holes that gradually become thinner from inside to outside. An oil injection pipe is connected to the rubber sleeve and enters one of the heat dissipation holes.

[0009] As a further preference, a positioning port communicating with the hanging hole is provided by opening from the outside of the towing ring inward. A positioning plate is provided on the outside of the core ring. The core ring is sleeved in the hanging hole of the towing ring, and the positioning plate extends into the positioning port.

[0010] As a further preference, an annular channel is provided by opening from the inner circle of the core ring to the outer circumference direction. Each core rope unit constituting the core rope enters the annular channel and is welded in the annular channel through a welding process.

[0011] As a further preference, the supporting part is a horn-shaped structure. Its large end abuts against the extrusion surface, and its small end enters the sunken cavity and presses inside the sunken cavity. Two plastic deformation edges, an inner and an outer one, are formed between the large end and the small end of the supporting part. The outer plastic deformation edge corresponds to the active space. Limiting grooves are provided on the opposite surfaces of the polyurethane connector and the large end of the supporting part, and the rubber sleeve is restricted in the limiting grooves.

[0012] The beneficial effects of the present invention compared with the prior art are:

[0013] 1. The core rope is formed by twisting multiple core rope units. When the multi-strand steel wire rope body is twisted by multiple steel wire rope units, the core rope is engaged between the multiple steel wire rope units. Both the core rope and the steel wire rope body pass through a polyurethane connector and are welded inside the polyurethane connector. The core rope and the steel wire rope body are combined together and jointly play a traction role during use, and also jointly provide traction force. Each strand unit of the core rope enters the inner circle of the core ring, then is clamped into the annular groove of the core ring, and is connected to the core ring after welding. When the traction component of the traction device is inserted into the core ring to provide traction force, on the one hand, the core rope and the steel wire rope body bear the traction force, on the other hand, the core ring and the traction component bear the traction force, and a part of the traction force is borne by the assembly relationship between the polyurethane connector and the traction seat, and a part of the traction force is borne by the welding relationship of the polyurethane connector to the core rope and the steel wire rope body, ensuring the strength of the steel wire rope and improving safety.

[0014] 2. During traction, the core ring drives the core rope to move, the core rope drags the steel wire rope body forward, the steel wire rope body drags the traction component at the other end, and the traction component at the other end drags the target forward. When the core ring drags the core rope, since the core rope will also drag the steel wire rope body, and the steel wire rope body is connected inside the polyurethane connector by welding, the polyurethane connector will move forward and push the polyurethane elastic seat forward. The polyurethane elastic seat uses the extrusion relationship between the support part and the extrusion surface to force the support part to be elastically compressed forward in the moving space. At the same time, the polyurethane connector also moves forward in the moving space and forms an extrusion effect on the rubber sleeve, forcing the rubber sleeve to compress, so that the lubricating oil in the rubber sleeve is sent to the polyurethane connector through the rubber tube and sent into the traction cavity through multiple annular grooves on the polyurethane connector, automatically lubricating the cavity wall of the traction cavity. When the traction work is in progress, if torsion occurs, it is ensured that the polyurethane connector rotates in the traction cavity to eliminate the torsion, and the phenomenon of jamming is avoided when torsion occurs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of a half structure of a high-precision stainless steel synchronous rotating steel wire rope provided by an embodiment of the present invention;

[0016] Figure 2 It is a high-precision stainless steel synchronous rotating steel wire rope provided by an embodiment of the present invention Figure 1 The schematic plan view drawn;

[0017] Figure 3 It is a high-precision stainless steel synchronous rotating steel wire rope provided by an embodiment of the present invention Figure 2 The schematic diagram after the A part is cut open;

[0018] Figure 4 It is a high-precision stainless steel synchronous rotating steel wire rope provided by an embodiment of the present invention Figure 3Schematic enlarged view of part B drawn out;

[0019] Figure 5 Schematic diagram of a partially cut high-precision stainless steel synchronous rotating wire rope provided by an embodiment of the present invention;

[0020] Figure 6 Schematic diagram of a disassembled high-precision stainless steel synchronous rotating wire rope provided by an embodiment of the present invention;

[0021] Figure 7 Partial schematic diagram of a disassembled high-precision stainless steel synchronous rotating wire rope from another perspective provided by an embodiment of the present invention.

[0022] In the figure: 1. Wire rope body; 2. Traction member; 3. Wire rope unit; 4. Polyurethane connector; 401. Ring groove; 5. Traction seat; 503. Heat dissipation hole; 6. Traction ring; 601. Positioning port; 7. Traction cavity; 8. Sunk cavity; 9. Polyurethane elastic seat; 10. Linear segment extension; 501. First part; 502. Second part; 11. Step part; 12. Extrusion surface; 13. Support part; 131. Plastic deformation edge; 14. Activity space; 15. Rubber sleeve; 16. Rubber tube; 17. Core rope; 18. Channel; 19. Core ring; 191. Positioning plate; 192. Ring channel; 413. Limit groove. Specific embodiments

[0023] The above and other embodiments and advantages of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of them.

[0024] In one embodiment, as Figures 1-7 shown:

[0025] The present embodiment provides a high-precision stainless steel synchronous rotating wire rope, including a wire rope body 1 and a traction member 2 arranged at the head of the wire rope body 1, the wire rope body 1 is composed of a plurality of wire rope units 3 twisted together, and their ends are welded and fused with a polyurethane connector 4, the traction member 2 includes a traction seat 5 and a traction ring 6 located at one end of the traction member 2 and integrated with the traction member 2, a traction cavity 7 is provided in the traction seat 5, the polyurethane connector 4 is transferred into the traction cavity 7, and a sink cavity 8 is provided on the other end of the polyurethane connector 4 away from the wire rope unit 3, a straight line segment extension 10 is provided at the connection between the traction seat 5 and the traction ring 6, a step portion 11 is formed between the straight line segment extension 10 and the traction cavity 7, an extrusion surface 12 is provided on the side of the step portion 11 facing the sink cavity 8, a polyurethane elastic seat 9 is connected in the sink cavity 8, and the polyurethane elastic seat 9 is connected in the sink cavity 8. A support portion 13 is provided at the other end of the seat 9, and the support portion 13 extends out of the sink cavity 8. Under the support of the support portion 13, an activity space 14 is formed between the polyurethane connector 4 and the extrusion surface 12. The activity space 14 is filled with a rubber sleeve 15, and a rubber hose 16 is provided on the rubber sleeve 15. The rubber sleeve 15 is filled with lubricating oil. The outer cylindrical surface of the polyurethane connector 4 is close to the cavity wall of the traction cavity 7. The rubber hose 16 enters the polyurethane connector 4 and communicates with the outer cylindrical surface of the polyurethane connector 4. A core rope 17 is twisted in the wire rope body 1 at the same time. A channel 18 is opened in the straight segment extension portion 10. One end of the channel 18 is communicated with the traction cavity 7, and the other end of the channel 18 is communicated with the hanging hole of the traction ring 6. The hanging hole of the traction ring 6 is provided with a core ring 19. The core rope 17 enters the hanging hole of the traction ring 6 through the channel 18 and is welded to the core ring 19.

[0026] like Figure 7 As shown, the traction seat 5 is composed of a first part 501 formed on the straight section extension 10 at one time and a second part 502 detachably assembled on the first part 501. The outside of the first part 501 and the second part 502 are elliptical surfaces, and the elliptical surfaces involve the outer range of the traction cavity 7. It can be seen that the traction seat 5 can be removed, the first part 501 and the second part 502 can be connected by deep screws, and when the polyurethane connector 4 is severely worn in the traction cavity 7, the polyurethane connector 4 can be replaced by disassembly.

[0027] like Figures 3 to 5As shown in the figure, the core rope 17 is formed by twisting multiple core rope units. When the steel wire rope body 1 is twisted by multiple steel wire rope units 3, the core rope 17 is engaged between the multiple steel wire rope units 3. Both the core rope 17 and the steel wire rope body 1 pass through the polyurethane connector 4 and are welded inside the polyurethane connector 4. That is, the core rope 17 and the steel wire rope body 1 are combined together and jointly play a traction role during use, and also jointly provide traction force. Each unit of the core rope 17 enters the inner circle of the core ring 19, then is clamped into the annular groove 192 of the core ring 19, and is connected to the core ring 19 after welding. When the traction component of the traction device is inserted into the core ring 19 to provide traction force, on the one hand, the core rope 17 and the steel wire rope body 1 bear the traction force, on the other hand, the core ring 19 and the traction part 2 bear the traction force, and a part of the traction force is also borne by the assembly relationship between the polyurethane connector 4 and the traction seat 5, and a part of the traction force is also borne by the welding relationship of the polyurethane connector 4 to the core rope 17 and the steel wire rope body 1, ensuring the strength of the steel wire rope and improving safety.

[0028] As a further preference, a number of annular grooves 401 are provided on the outer circumferential surface of the polyurethane connector 4 along the length direction, and a number of heat dissipation holes 503 are provided on the traction seat 5. The number of heat dissipation holes 503 is distributed outside the annular groove 401 and is internally and externally communicated with the annular groove 401. The heat dissipation holes 503 are tapered holes that gradually become thinner from the inside to the outside. An oil injection pipe is connected to the rubber sleeve 15, and the oil injection pipe enters one of the heat dissipation holes 503. The oil injection pipe is used to supplement lubricating oil into the rubber sleeve 15.

[0029] As a further preference, a positioning port 601 communicating with the hanging hole is provided from the outside to the inside of the traction ring 6, and a positioning plate 191 is provided on the outside of the core ring 19. The core ring 19 is sleeved in the hanging hole of the traction ring 6, and the positioning plate 191 extends into the positioning port 601.

[0030] Principle of use and technical effect: As Figure 1 shown, a set of traction parts 2 with the same structure will be provided at both ends of the steel wire rope. Since the structures of the two sets of traction parts 2 are exactly the same, the present invention Figure 1As shown in the second half, the towing member 2 is hung on the object to be towed through the towing ring 6. During towing, the steel wire rope body 1 provides the towing force, and the towing member 2 can rotate synchronously when rotating relative to the object, enabling the steel wire rope to cope with the towing force and torsion and improving the service life. In addition, when torsion is generated, the towing seat 5 rotates relative to the polyurethane connector 4, and the polyurethane connector 4 has a towing effect on the steel wire rope body 1. By fusing the polyurethane connector 4 and the steel wire rope body 1 together, the steel wire rope body 1 is prevented from falling off. The polyurethane connector 4 has high wear resistance and certain elasticity. When the towing seat 5 rotates relative to the polyurethane connector 4, the polyurethane connector 4 is prevented from deforming through elastic wear resistance. Before towing, the hanging and taking part on the power equipment is inserted into the core ring 19. When the towing starts initially, a towing force is formed on the core ring 19, causing the core ring 19 to drive the positioning plate 191 to displace forward. The positioning plate 191 moves along the positioning port 601 to ensure that the core ring 19 remains within the towing ring 6. As the core ring 19 displaces, the core rope 17 is towed forward, the core rope 17 towes the steel wire rope body 1 forward, the steel wire rope body 1 is used to tow the towing member 2 at the other end, and the towing member 2 at the other end is used to tow the object forward. When the core ring 19 tows the core rope 17, since the core rope 17 will also tow the steel wire rope body 1, and the steel wire rope body 1 is connected to the polyurethane connector 4 by welding, the polyurethane connector 4 will move forward and push the polyurethane elastic seat 9 forward, causing the polyurethane elastic seat 9 to force the support portion 13 to elastically compress forward within the moving space 14 by utilizing the extrusion relationship between the support portion 13 and the extrusion surface 12. At the same time, the polyurethane connector 4 also moves forward within the moving space 14 and forms an extrusion effect on the rubber sleeve 15, forcing the rubber sleeve 15 to compress, so that the lubricating oil in the rubber sleeve 15 is sent to the polyurethane connector 4 through the rubber tube 16 and sent into the towing cavity 7 through multiple annular grooves 401 on the polyurethane connector 4, automatically lubricating the cavity wall of the towing cavity 7. When the towing work is in progress, if torsion is generated, it is ensured that the polyurethane connector 4 rotates within the towing cavity 7 to eliminate the torsion, and the phenomenon of jamming is avoided when torsion is generated.

[0031] Since the polyurethane connector 4 is made of polyurethane material, in addition to having the characteristic of anti-wear during rotation, it fuses the steel wire rope body 1 and the core rope 17 together, enabling it to also play a role in improving the strength of the steel wire rope when bearing the towing force. By forming a moving space 14 between the end of the polyurethane connector 4 and the extrusion surface 12, the polyurethane connector 4 has a certain movement range when being towed, and when acting on the rubber sleeve 15 to compress the rubber sleeve 15, it provides lubricating oil to the polyurethane connector 4. In order to lubricate the polyurethane connector 4, in the present invention, it is not necessary to provide power to the rubber sleeve 15 through an additional driving method, but the original towing structure of the polyurethane connector 4 can be utilized to achieve this. That is, the towing seat 5 is not only the connecting part and rotating part of the polyurethane connector 4, but also the lubricating part.

[0032] Since the end of the core rope 17 is connected through the core ring 19 and then assembled into the hanging hole of the traction ring 6, during use, the core ring 19 is both the hanging and taking position of the traction device or the object to be towed (the core ring 19 at the other end), and the component that provides traction force to the core rope 17 when towing or being towed. In the initial state, the hanging holes of the core ring 19 and the traction ring 6 are on the same center of the circle. When the core ring 19 is subjected to the traction force, it will move forward along the positioning port 601 of the traction ring 6 under the guidance of the positioning plate 191. Through this forward movement, the polyurethane connector 4 is towed by the core rope 17, and then the polyurethane connector 4 squeezes the rubber sleeve 15 to compress, so as to complete rapid lubrication for the polyurethane connector 4. The realization of this lubrication action does not require manual control, but is automatically completed when the traction ring 6 is inserted into the traction device or the object to be towed during traction.

[0033] As Figure 4 、 Figure 6 and Figure 7 shown, the support part 13 is a horn-shaped structure. Its large end abuts against the extrusion surface 12, and its small end enters the sunken cavity 8 and presses inside the sunken cavity 8. Two plastic deformation edges 131, an inner one and an outer one, are formed between the large end and the small end of the support part 13. The outer plastic deformation edge 131 corresponds to the active space 14. Limiting grooves 413 are provided on the opposite surfaces of the polyurethane connector 4 and the large end of the support part 13, and the rubber sleeve 15 is restricted within the limiting grooves 413. When the polyurethane connector 4 squeezes the rubber sleeve 15 under the traction of the core rope 17, the rubber sleeve 15 cannot move radially under the restriction of the limiting grooves 413 and can only be compressed. At the same time, the polyurethane elastic seat 9 uses the limiting grooves 413 on the support part 13 to form a restriction on the other side of the rubber sleeve 15. As the rubber sleeve 15 is compressed and deformed, the support part 13 will also undergo plastic deformation at the position of the plastic deformation edge 131, which plays a role in flexibly protecting the other side of the rubber sleeve 15. After the traction force disappears, the support part 13 returns to its original state at the position of the plastic deformation edge 131, and in the way of restoring to the original state, it pushes the polyurethane connector 4 back to the original position through the polyurethane elastic seat 9. When the rubber sleeve 15 returns to its original state and waits for the next traction, the above-mentioned lubrication action is repeated.

[0034] The above orientation references do not represent the specific orientations of the components in this implementation scheme. This implementation scheme is only for the convenience of describing the scheme and is set with relative descriptions with reference to the orientations in the figure. In essence, the specific orientations of the components are based on their actual installation, actual use, and the habitual orientation descriptions of those skilled in the art. This is hereby explained.

[0035] The specific embodiments described above further elaborate on the object of the invention, the technical solution, and the beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. In particular, for those skilled in the art, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-precision stainless steel synchronous rotating wire rope, characterized in that, The invention comprises a steel wire rope body (1) and a traction member (2) arranged at the head of the steel wire rope body (1), wherein the steel wire rope body (1) is composed of a plurality of steel wire rope units (3) twisted together, and the ends of the steel wire rope units are welded and fused with a polyurethane connector (4), and the traction member (2) comprises a traction seat (5) and a traction ring (6) located at one end of the traction member (2) and integrated with the traction member (2), and a traction cavity (7) is arranged in the traction seat (5), and the polyurethane connector (4) is transferred into the traction cavity (7). A sinking cavity (8) is provided on the other end of the polyurethane connector (4) away from the wire rope unit (3); a straight segment extension portion (10) is provided at the connection between the traction seat (5) and the traction ring (6); a step portion (11) is formed between the straight segment extension portion (10) and the traction cavity (7); an extrusion surface (12) is provided on the side of the step portion (11) facing the sinking cavity (8); a polyurethane elastic seat (9) is connected to the sinking cavity (8); a support portion (13) is provided at the other end of the polyurethane elastic seat (9); The support portion (13) extends outside the sinking cavity (8), and under the supporting action of the support portion (13), an active space (14) is formed between the polyurethane connector (4) and the extrusion surface (12), the active space (14) is filled with a rubber sleeve (15), a rubber hose (16) is provided on the rubber sleeve (15), and the rubber sleeve (15) is filled with lubricating oil. The outer circumferential surface of the polyurethane connector (4) is close to the cavity wall of the traction cavity (7), and the rubber hose (16) enters the polyurethane connector (4) and The steel wire rope body (1) is connected to the outer cylindrical surface of the polyurethane connector (4), and a core rope (17) is twisted in the steel wire rope body (1). A channel (18) is provided in the straight section extension portion (10), one end of the channel (18) is connected to the traction cavity (7), and the other end of the channel (18) is connected to the hanging hole of the traction ring (6). A core ring (19) is provided in the hanging hole of the traction ring (6), and the core rope (17) passes through the channel (18) and enters the hanging hole of the traction ring (6) and is welded to the core ring (19).

2. The high-precision stainless steel synchronous rotating wire rope according to claim 1, wherein The traction seat (5) is composed of a first part (501) formed at one time on the straight section extension (10) and a second part (502) detachably assembled on the first part (501).

3. A high-precision stainless steel synchronous rotating steel wire rope according to claim 1, characterized in that, The outside of the first part (501) and the second part (502) is an elliptical surface, and the elliptical surface involves the outer range of the traction cavity (7).

4. A high-precision stainless steel synchronously rotating wire rope according to claim 3, characterized in that, The core rope (17) is formed by twisting a plurality of core rope units, and is then captured between the plurality of steel wire rope units (3) when the steel wire rope body (1) is twisted through the plurality of steel wire rope units (3). The core rope (17) and the steel wire rope body (1) are both passed through the polyurethane connector (4) and fused inside the polyurethane connector (4).

5. A high-precision stainless steel synchronous rotating wire rope according to claim 4, characterized in that, A plurality of annular grooves (401) are formed in the outer circumferential surface of the polyurethane connector (4) along the length direction. A plurality of heat dissipation holes (503) are formed in the towing seat (5). The plurality of heat dissipation holes (503) are distributed outside the annular grooves (401) and are internally and externally communicated with the annular grooves (401). The heat dissipation holes (503) are tapered holes that gradually become thinner from the inside to the outside. An oil injection pipe is connected to the rubber sleeve (15), and the oil injection pipe enters one of the heat dissipation holes (503).

6. A high-precision stainless steel synchronously rotating steel wire rope according to claim 5, characterized in that, A positioning port (601) communicating with the hanging hole is formed from the outside of the towing ring (6) inward. A positioning plate (191) is provided on the outside of the core ring (19). The core ring (19) is sleeved in the hanging hole of the towing ring (6), and the positioning plate (191) extends into the positioning port (601).

7. A high-precision stainless steel synchronously rotating steel wire rope according to claim 6, characterized in that, An annular channel (192) is formed from the inner circumference of the core ring (19) to the outer circumference. Each core rope unit constituting the core rope (17) enters the annular channel (192) and is welded in the annular channel (192) by a welding process.

8. A high-precision stainless steel synchronous rotating steel wire rope according to claim 7, characterized in that, The support portion (13) is a horn-shaped structure. Its large end abuts against the extrusion surface (12), and its small end enters the sunken cavity (8) and is pressed in the sunken cavity (8). Two plastic deformation edges (131) inside and outside are formed between the large end and the small end of the support portion (13). The outer plastic deformation edge (131) corresponds to the active space (14). Limiting grooves (413) are formed on the opposite surfaces of the polyurethane connector (4) and the large end of the support portion (13), and the rubber sleeve (15) is restricted in the limiting grooves (413).

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