Self-locking connector

Abstract

The invention discloses a self-locking connector which comprises a conductive connector main body, and the connector main body is provided with a wire clamp part used for being connected with a cable and a locking connection part used for being connected with a transformer terminal. The wire clamp part comprises a static chuck, a movable chuck arranged opposite to the static chuck, and a spring self-locking structure; the movable chuck comprises a pressing plate and a bolt rotationally connected with the top of the pressing plate. The end part of the bolt penetrates through a through hole formed in the connector main body, the pressing plate and the static chuck are driven to clamp the cable, and the spring self-locking structure self-locks and unlocks the bolt. According to the invention, the action state of the bolt is controlled through the spring self-locking structure, the bolt at the wire clamping part of the connector is prevented from loosening, and the cable clamping stability of the connector is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power tools, and in particular to a self-locking connector. Background Art

[0002] Transformer terminal connectors are used to connect transformer terminals and cables. The bolts of existing connectors that clamp bare cable conductors will loosen over time, especially in an environment with a lot of grease or high-frequency vibration. The bolts are more likely to loosen, causing the cable clamp to clamp the bare cable conductor unsteadily or even loosen, causing the corresponding connector to fail to work properly. Summary of the invention

[0003] The invention provides a self-locking connector to prevent the wire clamp bolts of the self-locking connector from loosening.

[0004] The present invention adopts the following technical solutions:

[0005] A self-locking connector comprises a conductive connector body, wherein the connector body has a wire clamp portion and a locking connection portion;

[0006] The wire clamp part includes a static clamp, a dynamic clamp arranged opposite to the static clamp, and a spring self-locking structure;

[0007] The dynamic clamp includes a pressure plate and a bolt that is rotatably connected to the top of the pressure plate; the end of the bolt passes through a through hole provided on the connector body, driving the pressure plate and the static clamp to clamp the cable, and the spring self-locking structure self-locks and unlocks the bolt.

[0008] In this solution, the bolt action state is controlled by a spring self-locking structure to prevent the bolts of the connector wire clamp from loosening, thereby improving the stability of the clamped cable.

[0009] As an improvement of the above-mentioned scheme, the spring self-locking structure includes a self-locking spring wound in the bolt thread, and the self-locking spring is a helical torsion spring; the lower end of the self-locking spring is fixed on the connector body, and the upper end force arm of the self-locking spring is connected to a moving block that can provide a variable space for the torsion of the upper force arm of the self-locking spring, and the moving block is located in a guide groove set on the outer shell of the connector body; the inner diameter of the spring is smaller than the middle diameter of the bolt thread.

[0010] In this solution, since the inner diameter of the spring is smaller than the middle diameter of the bolt thread, the self-locking spring is screwed into the bolt thread, and the inner diameter of the self-locking spring becomes larger. Relying on the tightening force of the self-locking spring, the self-locking spring and the thread generate a large friction force to achieve the purpose of self-locking; the moving block is manually turned to unlock the torsion spring force arm in the variable space, and the self-locking spring is deformed. The inner diameter of the self-locking spring is larger than the middle diameter of the bolt thread. At this time, the bolt can be easily rotated by turning it. This solution is more convenient and quicker to quickly self-lock and unlock the bolt through the moving block. Since the lower end of the self-locking spring is fixed to the connector body, the self-locking spring locks the bolt to avoid relative rotation between the bolt and the connector body. The double locking and fixing bolts that realize spring self-locking and connector body fixation have a better anti-loosening effect.

[0011] The mid diameter refers to the effective diameter between the outer diameter of the bolt's external thread and the bottom diameter. The variable space refers to the space in which the spring arm can rotate.

[0012] As an improvement of the above solution, a groove is provided on the connector body, and the lower end of the self-locking spring is wound into the groove corresponding to the connector body to form a self-locking spring fixing portion. In this solution, the self-locking spring is fixed by extending and bending the lower end of the self-locking spring and winding it on the body, which simplifies the components for fixing the self-locking spring and is easy to process.

[0013] As an improvement of the above solution, a knurled pin is arranged in the groove, and the notch diameter of the groove is smaller than the diameter of the knurled pin. This solution uses the wire groove of the knurled pin to clamp on the wire diameter of the fixing part, thereby improving the stability of the wire diameter of the fixing part being fixed.

[0014] As an improvement of the above solution, the through hole is divided into a threaded section and a through hole section, the bolt is threadedly connected to the threaded section, and the through hole section accommodates the bolt wound with the self-locking spring;

[0015] A groove leading to the end face of the connector body is arranged at the connection between the through hole section and the threaded section, so as to facilitate the winding and fixing of the lower end of the self-locking spring.

[0016] In this solution, the self-locking spring can be hidden in the through-hole section of the connector body, and the insulating shell provided outside the connector body can decompress the volume, reduce costs, and reduce the volume of the overall cable clamp. The groove provided on the connector body facilitates the winding and fixing of the lower end of the self-locking spring.

[0017] As an improvement of the above solution, a blind groove is provided on the top surface of the pressing plate for inserting the end surface of the bolt; first grooves or first through holes are provided on both sides of the blind groove, and the projection of the first groove or the first through hole is located on the blind groove and is connected to the side end surface of the pressing plate;

[0018] A second groove is arranged on the circumference of the screw rod away from the bolt head;

[0019] The notch diameter of the first groove is smaller than the diameter of the pin body. The pin body passes through the first groove or the first through hole and the second groove of the screw rod on both sides of the blind groove to rotate and connect the pressure plate and the bolt.

[0020] In this solution, the distance between the pin bodies on both sides of the blind hole is larger than the diameter of the second groove of the screw rod and smaller than the outer diameter of the screw rod, so that the second groove of the screw rod is clamped and the bolt is rotatably connected with the pressure plate. Due to the blind groove, the pin body and the second groove of the screw rod, the structure is simple, the processing technology is simple, and the cost is reduced.

[0021] Preferably, a guide rail is integrally provided on the connector body, and a slot adapted to the guide rail is provided on the moving block, and the slot slides along the guide rail.

[0022] In this solution, the integrated guide rail of the wire clamp body is slidably connected to the slot of the moving block, which reduces the influence of the relative displacement between the shell and the wire clamp body on the torsion of the self-locking spring force arm and improves the stability of the torsion of the self-locking spring force arm.

[0023] As an improvement of the above scheme, the locking connection part includes a first guide hole, a circular hole, and a truncated cone hole which are coaxially connected in sequence, the diameter of the cylindrical hole is the same as the diameter of the upper bottom surface of the truncated cone hole, and the inner wall of the cavity formed by the two; the connection between the truncated cone hole and the cylindrical hole is the reduced diameter end of the truncated cone hole;

[0024] The inner wall of the truncated cone hole is adapted to accommodate a tapered block, and a first threaded hole and a second threaded tapered hole are sequentially coaxially connected, and the connection between the first threaded hole and the second threaded tapered hole is a reduced diameter end of the tapered block;

[0025] A through groove or a longitudinal blind groove is arranged on the peripheral wall of the taper block, and the through groove or the longitudinal blind groove circumferentially divides the taper block into a plurality of clamping pieces, providing a variable space for radial contraction clamping of the taper block;

[0026] An external bolt is threadedly connected through the first guide hole, the round hole and the first threaded hole.

[0027] In this solution, the external bolt is screwed to provide a force to move the tapered block toward the first guide hole, and the frustum hole wall squeezes the outer wall of the tapered block to radially shrink toward the axis of the tapered block, so that the clamping piece of the second threaded hole clamps and locks the cylindrical terminal of the transformer, thereby connecting the cylindrical terminal of the transformer and the cable clamped by the wire clamp, and achieving conductive connection.

[0028] As an improvement of the above solution, an angle is formed between the axis of the wire cavity formed by the static clamp and the dynamic clamp of the wire clamp part and the axis of the internal threaded hole of the tapered block of the locking connection part.

[0029] In this solution, the angle determines the physical position state between the cylindrical terminal of the transformer and the incoming and outgoing cables clamped by the wire clamp, that is, whether the incoming and outgoing cables are vertically out, obliquely out, or straight out. The specific angle can be designed according to the specific use environment or user of the self-locking connector.

[0030] As an improvement of the above solution, the locking connection portion further includes a spring self-locking structure;

[0031] The spring self-locking structure includes a self-locking spring wound in the external bolt thread, and the self-locking spring is a spiral torsion spring; the lower end of the self-locking spring is fixed on the connector body, and the upper end force arm of the self-locking spring is connected to a moving block that can provide a variable space for the torsion of the upper force arm of the self-locking spring, and the moving block is located in another guide groove provided on the outer shell of the connector body; the inner diameter of the spring is smaller than the middle diameter of the external bolt thread.

[0032] In this solution, the thread of the external bolt of the locking connection is wound with a self-locking spring. Since the inner diameter of the spring is smaller than the middle diameter of the bolt thread, the inner diameter of the self-locking spring becomes larger when the self-locking spring is screwed into the bolt thread. Relying on the tightening force of the self-locking spring, the self-locking spring and the thread generate a large friction force to achieve the purpose of self-locking. The moving block is manually turned to unlock the torsion spring force arm in the variable space, and the self-locking spring is deformed. The inner diameter of the self-locking spring is larger than the middle diameter of the bolt thread. At this time, the bolt can be easily rotated by turning it. This solution is more convenient and quicker to quickly self-lock and unlock the bolt through the moving block. Since the lower end of the self-locking spring is fixed to the connector body, the self-locking spring locks the bolt to avoid relative rotation between the bolt and the connector body. The double locking and fixing bolts that realize spring self-locking and connector body fixation play a better role in preventing loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a structural schematic diagram of a self-locking connector provided by an embodiment of the present invention;

[0034] Figure 2 It is a partial structural schematic diagram of a wire clamp portion of a self-locking connector provided by an embodiment of the present invention, viewed from the left and cutting through the bolt axis;

[0035] Figure 3 It is a structural schematic diagram of the connection relationship between a spring self-locking structure and a bolt of a self-locking connector provided by an embodiment of the present invention;

[0036] Figure 4 It is a structural schematic diagram of the spring self-locking structure provided by the present invention;

[0037] Figure 5 It is a structural schematic diagram of the connection relationship between an insulating housing and a moving block of a self-locking connector provided by an embodiment of the present invention;

[0038] Figure 6 It is a schematic diagram of the structure of the knurled pin provided by the present invention;

[0039] Figure 7 It is a schematic diagram of the pressure plate structure of the wire clamp part provided by the present invention;

[0040] Figure 8 It is a schematic diagram of an exploded structure of a locking connection portion of a self-locking connector provided by an embodiment of the present invention;

[0041] Fig. 9 is a schematic structural diagram of a taper block provided by an embodiment of the present invention;

[0042] Fig.10 It is a schematic diagram of the cross-sectional structure along the axis of the bolts of the clamping part and the axis of the bolts of the locking connection part of a self-locking connector provided by an embodiment of the present invention;

[0043] Fig.11 It is a schematic diagram of the cross-sectional structure of a self-locking connector along the axis of the clamping portion bolt and the axis of the locking connection portion bolt provided by another embodiment of the present invention. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0045] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] See also Figure 1, a schematic diagram of the structure of a self-locking connector provided by an embodiment of the present invention. The self-locking connector comprises a conductive connector body 1, the connector body having a wire clamp portion 2 for connecting a cable and a locking connection portion 3 for connecting a transformer terminal. Optionally, the locking connection portion is connected to other cable conductors or terminals.

[0048] The wire clamping part includes a stationary clamp 230, a dynamic clamp arranged opposite to the stationary clamp, and a spring self-locking structure 100. The dynamic clamp includes a pressing plate 241 and a bolt 210 connected to the top of the pressing plate; a through hole is arranged on the connector body, the through hole is divided into a threaded section 211 and a through hole section 212, the bolt passes through the through hole and is threadedly connected to the threaded section, and the bolt moves up and down with the rotation of the thread to drive the pressing plate to clamp or remove the cable conductor, and the cable conductor here is a bare wire.

[0049] The spring self-locking mechanism includes a self-locking spring 120 wound in the bolt thread, and the self-locking spring is a spiral torsion spring; the lower end of the self-locking spring is fixed to the connector body, and the upper end force arm 121 of the self-locking spring is connected to a moving block 130 that can provide a variable space for the upper torsion of the self-locking spring, and the moving block is located in a guide groove 221 provided on the insulating shell 10 of the connector body. The moving block is an insulator structure.

[0050] A guide rail 214 is integrally arranged on the connector body, and a slot 131 adapted to the guide rail is arranged on the moving block 130. The slot 131 slides along the guide rail 214 to change the unlocking or locking working state of the moving block; a protrusion 132 for connecting the force arm of the self-locking spring is arranged above the slot, and an insulating housing 10 is arranged outside the connector body. A guide groove 221 is reserved on the insulating housing, and the insulating moving block 130 passes through the guide groove 221. The guide groove limits the self-locking end 222 of the moving block, and provides a variable space for twisting and unlocking the upper part of the self-locking spring. The other end of the guide groove 221 is an unlocking end 223.

[0051] The inner diameter of the self-locking spring is smaller than the mean diameter of the matching thread. When the self-locking spring is screwed into the thread of the matching screw, the inner diameter of the self-locking spring becomes larger. Relying on the tightening force of the self-locking spring, the self-locking spring and the thread generate a large friction force to achieve the purpose of self-locking.

[0052] The self-locking spring of this embodiment rotates counterclockwise when viewed from above. Under normal circumstances, the moving block is located at the self-locking end on the right side of the guide groove, which is used to limit the self-locking spring from continuing to rotate toward the self-locking end of the guide groove. The self-locking end of the guide groove further limits the force arm of the self-locking spring through the moving block, making the self-locking more secure and stable.

[0053] When the moving block is manually moved toward the unlocking end, due to the variable space in the guide groove, the force arm of the self-locking spring is twisted by the external force of the moving block, and the self-locking spring is deformed. The inner diameter of the self-locking spring is larger than the middle diameter of the bolt thread. At this time, the bolt can be easily rotated by turning it.

[0054] The through hole section 212 accommodates the bolt wound with the self-locking spring, and the threaded section 211 is threadedly connected to the bolt 210, so that the pressure plate connected to the end of the bolt can move up and down to clamp or remove the cable body with the static clamp. A groove 213 leading to the end face of the connector body is provided at the connection between the through hole section and the threaded section, so that the lower end of the self-locking spring is wound and fixed to form a fixing part 124 of the self-locking spring to fix the locking spring. The plane enclosed by the fixing part of the self-locking spring has an angle with the bottom surface of the self-locking spring, and the angle is an acute angle or an obtuse angle, so as to reduce the shaking of the fixing part in the groove.

[0055] Since the wire diameter of the spring is relatively thin, a knurled pin 140 is placed in the groove 213, and the wire groove of the knurled pin presses the wire diameter of the fixed part. Even if the wire diameter of the fixed part shakes, it rolls through the wire groove 1411 of the knurled pin, and the next knurled pin wire groove continues to press on the wire diameter of the fixed part, thereby improving the stability of the wire diameter of the fixed part.

[0056] A blind groove 2411 is provided on the top surface of the pressure plate, into which the end face of the bolt 210 is inserted. A second groove is provided on the bolt rod away from the bolt head, preferably a circumferential arc groove 2101 smaller than the inner diameter of the bolt thread. Two first grooves 2412 or first through holes are provided on the pressure plate on both sides of the blind groove, and the projections of the two groove bodies or the first through holes are located on the blind groove and connected to the side end face of the pressure plate; the notch diameter of the groove body is smaller than the diameter of the knurled pin, and when the knurled pin 141 is inserted from the two first grooves 2412 or the first through hole on the side end face of the pressure plate, it also passes through the circumferential arc groove 2101 of the bolt, thereby rotating and connecting the bolt and the pressure plate. The upward or downward twisting of the bolt drives the pressure plate to disassemble or clamp the cable body.

[0057] The locking connection part 3 includes a first guide hole 311 provided on the connector body, a cylindrical hole 312 having a diameter larger than the first guide hole, and a truncated cone hole 313, the three of which are coaxially connected in sequence, the diameter of the cylindrical hole is the same as the diameter of the upper bottom surface of the truncated cone hole, and the inner wall of the cavity formed by the two is smooth. The connection between the truncated cone hole and the cylindrical hole is the reduced diameter end of the truncated cone hole.

[0058] The inner wall of the truncated cone hole is adapted to accommodate a tapered block 320, which has a first threaded hole 321 and a second threaded tapered hole 322 arranged along the axis, which are coaxially connected in sequence, and the connection between the first threaded hole and the second threaded tapered hole is the reduced diameter end of the tapered block.

[0059] A through groove 324 and / or a longitudinal blind groove 323 are arranged on the peripheral wall of the tapered block. The through groove or the longitudinal blind groove circumferentially divides the tapered block into a plurality of clamping pieces, providing a variable space for radial contraction clamping of the tapered block.

[0060] The cylindrical terminal 300 of the transformer is inserted into the second threaded tapered hole, and an external bolt 310 passes through the first guide hole 311 and is connected to the first threaded hole 321 of the tapered block. The external bolt is screwed to provide a force for the tapered block to move toward the first guide hole, and the frustum hole wall squeezes the outer wall of the tapered block to radially shrink toward the axis of the tapered block, so that the second threaded tapered hole 322 clamps and locks the cylindrical terminal of the transformer.

[0061] In another embodiment, the locking connection part further includes a spring self-locking mechanism, a self-locking spring is wound on the thread of the external bolt, the upper end of the self-locking spring is connected to the moving block by a force arm, and the lower end is fixedly wound in another groove provided on the connector body. The moving block is limited by a first guide groove provided on the external insulating housing 10 of the connector body, and the first guide groove can provide a variable space for unlocking. The first guide hole accommodates the external bolt wound with the self-locking spring.

[0062] The inner wall of the second threaded hole is tapered, providing gradually enhanced radial pressure to the cylindrical terminal of the transformer and providing a more stable clamping force.

[0063] In the first embodiment of the tapered block, three longitudinal blind grooves 323 and an upper and lower straight groove 324 are arranged in the circumferential direction of the tapered block, and the inner threaded hole of the tapered block is radially connected with the outside through the longitudinal blind grooves and the straight grooves.

[0064] In the second embodiment of the taper block, a longitudinal blind groove 323 and an upper and lower straight groove 324 are arranged in the circumference of the taper block, and the inner threaded hole of the taper block is radially connected to the outside through the longitudinal blind groove and the straight groove. A radial blind groove is arranged between the bottom of the blind groove and the upper bottom surface of the taper block.

[0065] In the third embodiment of the tapered block, an upper and lower straight groove 324 is provided in the circumferential direction of the tapered block, and the inner threaded hole of the tapered block is radially connected with the outside through the straight groove.

[0066] There is an angle θ between the line cavity axis M formed by the static clamp and the dynamic clamp of the wire clamp part and the internal threaded hole axis N of the tapered block of the locking connection part. When the angle is 0 degrees, the axis of the cylindrical terminal of the transformer clamped by the tapered block is parallel to the axis of the cable connected to the wire clamp part, that is, the cylindrical terminal of the transformer and its input and output wires are in a straight output type.

[0067] When the angle is a right angle, the axis of the transformer cylindrical terminal clamped by the tapered block is perpendicular to the axis of the cable connected to the wire clamp, that is, the transformer cylindrical terminal is at a vertical angle to its inlet and outlet wires.

[0068] When the included angle θ is an acute angle or an obtuse angle, the transformer cylindrical terminal clamped by the tapered block and the cable line axis clamped by the wire clamp are at an acute angle or an obtuse angle, that is, the transformer cylindrical terminal and its entry and exit lines are oblique. The included angle θ can be set according to the different use environments of the transformer, or the different connection objects of the self-locking connector, and the different use environments of the connection objects of the self-locking connector, providing more use scenarios for the wiring of the self-locking connector.

[0069] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A self-locking connector, comprising a conductive connector body, characterized in that: The connector body has a wire clamp portion and a locking connection portion; The wire clamp part includes a static clamp, a dynamic clamp arranged opposite to the static clamp, and a spring self-locking structure; The dynamic clamp includes a pressure plate and a bolt that is rotatably connected to the top of the pressure plate; the end of the bolt passes through a through hole provided on the connector body, driving the pressure plate and the static clamp to clamp the cable, and the spring self-locking structure self-locks and unlocks the bolt.

2. The self-locking connector according to claim 1, characterized in that: The spring self-locking structure includes a self-locking spring wound in the bolt thread, and the self-locking spring is a spiral torsion spring; the lower end of the self-locking spring is fixed on the connector body, and the upper end force arm of the self-locking spring is connected to a moving block that can provide a variable space for the torsion of the upper force arm of the self-locking spring, and the moving block is located in a guide groove provided on the outer shell of the connector body; the inner diameter of the spring is smaller than the middle diameter of the bolt thread.

3. The self-locking connector according to claim 2, characterized in that: The connector body is provided with a groove, and the lower end of the self-locking spring is wound into the groove corresponding to the connector body to form a self-locking spring fixing part.

4. The self-locking connector according to claim 3, characterized in that: A knurled pin is arranged in the groove, and the notch diameter of the groove is smaller than the diameter of the knurled pin.

5. The self-locking connector according to claim 2, characterized in that: The through hole is divided into a threaded section and a through hole section, the bolt is threadedly connected to the threaded section, and the through hole section accommodates the bolt wound with the self-locking spring; A groove leading to the end face of the connector body is arranged at the connection between the through hole section and the threaded section, so as to facilitate the winding and fixing of the lower end of the self-locking spring.

6. The self-locking connector according to claim 1, characterized in that: A blind groove is provided on the top surface of the pressing plate for inserting the end surface of the bolt; first grooves or first through holes are provided on both sides of the blind groove, and the projection of the first groove or the first through hole is located on the blind groove and is connected to the side end surface of the pressing plate; A second groove is arranged on the circumference of the screw rod away from the bolt head; The notch diameter of the first groove is smaller than the diameter of the pin body. The pin body passes through the first groove or the first through hole and the second groove of the screw rod on both sides of the blind groove to rotate and connect the pressure plate and the bolt.

7. The self-locking connector according to claim 1, characterized in that: A guide rail is integrally arranged on the connector body, and a clamping groove adapted to the guide rail is arranged on the moving block, and the clamping groove slides along the guide rail.

8. The self-locking connector according to claim 1, characterized in that: The locking connection part comprises a first guide hole, a circular hole, and a truncated cone hole which are coaxially connected in sequence. The diameter of the cylindrical hole is the same as the diameter of the upper bottom surface of the truncated cone hole. The inner wall of the cavity formed by the two is formed. The connection between the truncated cone hole and the cylindrical hole is the reduced diameter end of the truncated cone hole. The inner wall of the truncated cone hole is adapted to accommodate a tapered block, and a first threaded hole and a second threaded tapered hole are sequentially coaxially connected, and the connection between the first threaded hole and the second threaded tapered hole is a reduced diameter end of the tapered block; A through groove or a longitudinal blind groove is arranged on the peripheral wall of the taper block, and the through groove or the longitudinal blind groove circumferentially divides the taper block into a plurality of clamping pieces, providing a variable space for radial contraction clamping of the taper block; An external bolt is threadedly connected through the first guide hole, the round hole and the first threaded hole.

9. The self-locking connector according to claim 8, characterized in that: There is an included angle between the axis of the wire cavity formed by the static clamp and the dynamic clamp of the wire clamp part and the axis of the internal threaded hole of the taper block of the locking connection part.

10. The self-locking connector according to claim 8, characterized in that: The locking connection portion also includes a spring self-locking structure; The spring self-locking structure includes a self-locking spring wound in the external bolt thread, and the self-locking spring is a spiral torsion spring; the lower end of the self-locking spring is fixed on the connector body, and the upper end force arm of the self-locking spring is connected to a moving block that can provide a variable space for the torsion of the upper force arm of the self-locking spring, and the moving block is located in another guide groove provided on the outer shell of the connector body; the inner diameter of the spring is smaller than the middle diameter of the external bolt thread.

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