Cable connector

Abstract

The invention belongs to the technical field of cable installation, and particularly relates to a cable connector which comprises an outer pipe, paired cylinder caps, a holding piece, a tightening cylinder, a spiral ring, a spring and an inner pipe. The cylinder caps are fixed at two ends of the outer tube. The holding piece comprises a ring body, a plurality of pressing arms and rubber pads arranged on the pressing arms. The outer side faces of the pressing arms are wedge-shaped curved surfaces, and the multiple wedge-shaped curved surfaces can be distributed on the same conical surface. And the tightening cylinder is sleeved on the holding piece, and an inner conical surface is formed at the end part of a cylinder cavity of the tightening cylinder. The spiral ring is matched with the ring body and can push the tightening cylinder to move, so that the inner conical surface pushes and presses the pressing arm to be folded in the direction close to the axis of the holding piece. The spring is arranged on the free end side of the ring body and can exert elastic thrust on the enclasping piece. The inner pipe is arranged between the holding pieces, and the two ends of the inner pipe are fixedly connected with the pressing arms on the two holding pieces respectively. And the electric connector is arranged in the tube cavity of the inner tube. According to the invention, the stress condition of the electric connector can be improved, and the connection stability and reliability of the cable at the electric connector can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of cable installation, and in particular to a cable connector. Background Art

[0002] The butt ends of two cables are usually connected by electrical connection terminals (hereinafter referred to as electrical connectors) to establish electrical connectivity between the two cables and connect multiple cables to form a continuous line for the purpose of being installed between power or communication facilities. With the advancement of communication technology, the laying of communication cables is becoming more and more widely used. Depending on the purpose of use and the installation scenario, communication cables can be installed in a variety of ways, such as overhead, landfill, pipeline and underwater. A large number of communication cables used in railway construction are mostly laid in overhead and pipelines. Whether it is an overhead cable line or a cable line laid through a pipeline, the butt electrical connectors of the two cables are susceptible to the falling effect caused by the weight of the cable, the vibration and dragging caused by peripheral facilities, and the swaying effect caused by strong winds, etc., resulting in poor connection firmness and stability of the electrical connectors.

[0003] In the prior art, the connection stability at the butt end of the cable is mainly guaranteed by the strength of the electrical connector itself, and in particular, by the mechanical properties such as tensile strength and toughness of the mechanical connection components on the electrical connector to resist the force transmitted along the axial direction of the cable when the cable is pulled or dragged by external forces. This axially transmitted force will cause the cable itself, the electrical connectors provided in the cable line, etc. to be subjected to cyclic stress. Compared with the cable itself, the electrical connector at the butt end of the cable is a relatively weak position, a stress concentration position, and is more likely to become a fault point in the entire line. After the cable line is laid and has been in operation for a long time, the electrical connector is subjected to long-term and frequent external pulling and dragging, and the strength of the mechanical connection components on the electrical connector is easily damaged under the action of cyclic stress, which can easily cause mechanical connection loosening, breakage, electrical connection instability, failure, and other faults at the electrical connector. Summary of the invention

[0004] The cable connector provided by the present invention can improve the stress condition at the electrical connector, and is helpful to improve the connection firmness and stability of the cable at the electrical connector.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a cable connector, including an outer tube, two tube caps, two clamping members, two tightening tubes, two spiral rings, two springs and an inner tube. The inner tube is relatively arranged in the center of the axial cavity of the outer tube. It is preferred that the outer diameter of the inner tube is smaller than the inner diameter of the outer tube, so that a radial spacing can be formed between the relative circumferential surfaces of the inner tube and the outer tube. The two tube caps, two clamping members, two tightening tubes, two spiral rings and two springs are divided into two groups, and are respectively arranged inside the two end sides of the axial cavity of the outer tube.

[0006] The two barrel caps are respectively fixed on the two ends of the outer tube through a threaded structure, and a through hole is formed on the bottom wall of the barrel cap.

[0007] The two clamping members are relatively arranged at the two ends of the axial cavity of the outer tube, that is, the two clamping members are both arranged in the axial cavity of the outer tube and are respectively close to the two ends of the axial cavity of the outer tube. The clamping member includes a ring body, a plurality of pressure arms arranged on the inner end surface of the ring body, and a rubber pad fixed on the inner side surface of each pressure arm. The plurality of pressure arms are distributed alternately around the circumferential direction. The outer side surface of the pressure arm is a wedge-shaped surface, and the plurality of wedge-shaped surfaces on the same clamping member are distributed on the same conical surface / conical annular surface, and the flared end of the conical surface / conical annular surface is located on the end side away from the ring body, that is, the flared end of the conical surface / conical annular surface corresponds to the free end of the pressure arm.

[0008] The two tightening cylinders are respectively sleeved outside the two clamping members, and the axial extension length of the tightening cylinder is smaller than the axial extension length of the clamping member. Preferably, the axial extension length of the tightening cylinder is smaller than the axial extension length of the pressure arm. An inner conical surface with a flared end facing outward is formed at one end of the axial cavity of the tightening cylinder.

[0009] The two screw rings are matched with the two ring bodies respectively through the threaded structure, which can drive the tightening tube to move axially toward the free end of the pressure arm to promote the contact and matching of the inner conical surface and the wedge-shaped surface. During this period, the pressure arm can be pushed to move in the radial direction, so that multiple pressure arms can be simultaneously gathered toward the axial center line direction of the clamping member, forcing the pressure arm to gradually clamp the cable, so that the clamping member and the cable are fixedly connected together.

[0010] The two springs are respectively mounted on the free end sides / outer end sides of the two ring bodies.

[0011] The tube cap can simultaneously seal the clamping piece, the tightening tube, the spiral ring and the spring arranged at the same end in the axial cavity of the outer tube, and keep the spring in a compressed state. The spring can exert elastic thrust on the clamping piece.

[0012] The inner tube is arranged between the two clamping members, and the two ends of the inner tube are respectively fixedly connected to the ends of the pressure arms on the two clamping members.

[0013] After the butt ends of cable 1 and cable 2 are connected by an electrical connector, the connection position of the electrical connector is correspondingly arranged in the axial cavity of the inner tube. The free end of cable 1 passes through the through hole of the clamping piece, spring, and tube cap arranged at one end of the outer tube and then extends to the outside; correspondingly, the free end of cable 2 passes through the through hole of the clamping piece, spring, and tube cap arranged at the other end of the outer tube and then extends to the outside.

[0014] Optionally, an elastic deformation portion 1 is formed at the root of the pressure arm, and the elastic deformation portion 1 can cause the pressure arm to be elastically deformed at its root, which helps to reduce the resistance when the tightening tube pushes the pressure arm to move radially, and can relatively easily adjust the rubber pad to a state of sufficient compression contact with the rubber of the cable.

[0015] Optionally, the number of pressure arms formed on the same ring body is an even number and is greater than four; correspondingly, a plurality of arm plates extending in the axial direction are respectively formed on the end faces at both ends of the inner tube, and the number of arm plates on one end side of the inner tube is half the number of pressure arms on the corresponding matching ring body.

[0016] Two pressing arms are grouped together, and clamping grooves are formed on the opposite surfaces of the two pressing arms in the same group. The arm plate can be inserted between the opposite surfaces of the two pressing arms in the group, and clamping protrusions are formed on the end surfaces of the arm plate facing the two pressing arms. When the arm plate is inserted between the two pressing arms in the group, the clamping protrusions on the arm plate can be finally inserted into the clamping grooves on both sides, so that the inner tube and the pressing arm are plugged and fixedly connected together.

[0017] Optionally, a pair of end caps are further included, and the two end caps are matched with the two barrel caps respectively. The through hole formed on the bottom wall of the barrel cap is an internal thread through hole.

[0018] An axial hole is formed on the bottom wall of the end cap, and an axial cylinder is formed on the end surface of the end cap facing the cylinder cap. An external thread surface 3 is formed on the outer peripheral surface of the axial cylinder. The external thread surface 3 matches the internal thread through hole to fix the end cap and the cylinder cap together. The cable can pass through the axial hole on the end cap and extend to the outside.

[0019] One end of the spring contacts the end cap, and the other end contacts the end face of the ring body or the end face of the spiral ring. Screwing the end cap can adjust the compression degree of the spring, thereby realizing the regulation of the elastic thrust of the spring acting on the clamping member.

[0020] Optionally, an axially extending light cylinder is formed on the free end side of the ring body so that the light cylinder can remain inserted into the barrel cavity of the axial barrel.

[0021] The spring is arranged in the axial cylinder and its two ends are respectively in contact with the inner bottom surface of the axial cylinder and the free end surface of the ring body.

[0022] Optionally, the spring sleeve is arranged on the free end side of the ring body. One end of the spring contacts the end face of the spiral ring. The other end of the spring either contacts the end face of the axial cylinder or contacts the inner bottom face of the cylinder cap. That is, when the end cap is provided, the other end of the spring can be made to contact the end face of the axial cylinder, and screwing the end cap can adjust the degree of compression of the spring, thereby realizing the regulation of the elastic thrust of the spring acting on the clamping member; when the end cap is not provided, the other end of the spring is made to contact the inner bottom face of the cylinder cap, and screwing the cylinder cap can adjust the degree of compression of the spring, thereby realizing the regulation of the elastic thrust of the spring acting on the clamping member.

[0023] Optionally, a detection unit is also included. The detection unit includes a sensor body fixed on the inner tube and a second elastic deformation part.

[0024] The second elastic deformation part includes a middle block and an elastic arm. One end of the elastic arm is connected to the middle block, and the other end extends to the inner wall surface of the outer tube. The sensor body is a strain sensor, and the strain gauge part of the strain sensor is fixed on the elastic arm.

[0025] A die is formed in the middle of the side wall of the outer tube, and a cover is fixed in the die. A V-shaped groove is formed on the inner wall of the cover. One end of the elastic arm extending toward the inner wall of the outer tube contacts the inner bottom surface of the V-shaped groove, so that when the inner tube moves axially relative to the outer tube, the elastic arm can be elastically deformed, which causes the strain gauge to synchronously produce physical quantity changes, and the sensing signal generated by the strain sensor will follow the real-time changes.

[0026] Optionally, the elastic arm portion includes two arched arms. The two arched arms are correspondingly arranged at the two ends of the middle block and extend toward both sides in the axial direction. The free ends of the two arched arms are in contact with the two inclined bottom surfaces of the V-shaped groove respectively. The outwardly protruding curved surfaces of the two arched arms face the corresponding inclined bottom surfaces respectively.

[0027] The sensor body contains two strain sensors, and the strain gauges of the two strain sensors are fixed on the concave surfaces of the two arch arms respectively. When the inner tube moves axially relative to the outer tube, the two arch arms can produce elastic deformation at the same time, which causes the two strain gauges to produce physical quantity changes synchronously. During this period, the sensing signals generated by the two strain sensors will change in real time. When the inner tube moves axially relative to the outer tube, the elastic deformation degree and trend of the two arch arms are different, so the physical quantity changes produced by the two strain gauges are also different. Correspondingly, the sensing signals generated by the two strain sensors will have significant differences, which is conducive to determining the direction of the inner tube's movement, oscillation frequency, amplitude, etc. It not only helps to improve the accuracy of judging whether the cable connection status is abnormal, but also facilitates the analysis of abnormal conditions to formulate feasible solutions.

[0028] The beneficial effects of the present invention are as follows: the present invention can improve the stress condition at the electrical joint, and help to improve the mechanical connection reliability and electrical connection stability of the two cables at the electrical joint.

[0029] In the embodiments of the present invention, the axial forces such as pulling and dragging transmitted along the cable will be damped at the outer sides of both ends of the electrical connector, so that the force finally acting on the electrical connector is significantly attenuated, which helps to prevent the electrical connector from being subjected to excessive pulling force and causing serious mechanical damage, and can ensure the electrical connection stability and mechanical connection reliability of the electrical connector; at the same time, the stress distribution range caused by the axial force transmitted along the cable on the cable will move to the outer sides of both ends of the electrical connector, and be dispersed to a longer distance for consumption and attenuation, which can improve the cyclic stress conditions of the cable itself and the electrical connector, and can effectively suppress the occurrence of serious stress damage at the electrical connector, or even rupture and other faults; Therefore, the present invention helps to ensure the reliability, stability and safety of the cable line operation. In addition, the cable connector of the present invention has a relatively simple structure, is easy and quick to install and use, and is well compatible with existing electrical connectors. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural diagram of embodiment 1 of the present invention.

[0031] Figure 2 for Figure 1 Schematic diagram of the local enlarged structure at point A in the middle.

[0032] Figure 3 It is a half-side split schematic diagram of the structure of embodiment 1 of the present invention.

[0033] Figure 4 This is a schematic diagram of the structure of the second embodiment of the present invention (half side).

[0034] Figure 5 It is a schematic diagram of the side structure of the clamping member.

[0035] Figure 6 It is a schematic diagram of the side structure of the inner tube.

[0036] In the figure: 10 outer tube, 11 outer thread surface 1, 12 cover plate, 121 V-shaped groove, 122 inclined bottom surface; 20 tube cap, 21 internal thread through hole, 22 internal thread countersunk hole; 30 clamping member, 31 ring body, 311 outer thread surface 2, 312 light cylinder, 32 pressure arm, 321 wedge-shaped surface, 322 elastic deformation part 1, 323 card groove, 324 surface a, 33 rubber pad; 40 tightening tube, 41 inner cone surface; 50 screw ring; 60 end cap, 61 axial tube, 611 outer thread surface 3, 612 elastic ring; 70 spring; 80 inner tube, 81 arm plate, 811 card protrusion; 90 detection unit, 91 sensor body, 92 elastic deformation part 2, 921 arch arm; 100 cable 1; 200 cable 2; 300 electrical connector. DETAILED DESCRIPTION

[0037] The structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention. At the same time, the terms such as "upper", "lower", "front", "back", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical contents.

[0038] like Figures 1 to 6 A cable connector shown includes an outer tube 10, a pair of tube caps 20, a pair of clamping members 30, a pair of tightening tubes 40, a pair of screw rings 50, a pair of end caps 60, a pair of springs 70, an inner tube 80 and a detection unit 90.

[0039] The inner diameter of the inner tube 80 is larger than the outer diameters of the cable 1 100 and the cable 2 200 that are connected to each other, so as to ensure that the electrical connector 300 connecting the cable 100 and the cable 2 200 can be smoothly placed in the axial cavity of the inner tube 80 .

[0040] External thread surfaces 11 are formed at the left and right ends of the outer tube 10, respectively, and the external thread surfaces 11 have a relatively long extension length in the axial direction.

[0041] An internal thread through hole 21 is formed on the bottom wall of the barrel cap 20, and an internal thread countersunk hole 22 is formed at the outer end of the axial cavity of the barrel cap 20. Two barrel caps 20 are respectively arranged at the left and right ends of the outer tube 10, and the barrel caps 20 are fixed to the ends of the outer tube 10 by matching the external thread surface 11 with the internal thread countersunk hole 22.

[0042] Two clamping members 30 are arranged oppositely at the two ends of the axial cavity of the outer tube 10. The clamping members 30 at each end are equipped with a tightening tube 40, a spiral ring 50, an end cap 60 and a spring 70.

[0043] The clamping member 30 includes a ring body 31, four pressure arms 32 arranged on the inner end surface of the ring body 31, and a rubber pad 33 fixed on the inner side surface of each pressure arm 32. The four pressure arms 32 are evenly spaced around the circumferential direction. The outer side surfaces of the pressure arms 32 are all wedge-shaped surfaces 321, and the wedge-shaped surfaces 321 of the four pressure arms 32 arranged on the same clamping member 30 are distributed on the same conical surface / conical annular surface, and the flared end of the conical surface / conical annular surface faces away from the end side of the ring body 31. At that time, after the assembly is completed, the free ends of the pressure arms 32 on the two clamping members 30 are opposite to each other, and the flared end of the conical surface / conical annular surface where the wedge-shaped surfaces 321 on the multiple pressure arms 32 on the left are distributed is opposite to the flared end of the conical surface / conical annular surface where the wedge-shaped surfaces 321 on the multiple pressure arms 32 on the right are distributed.

[0044] The inner diameter of the ring body 31 is not less than the outer diameter of the cable (i.e., cable 1 100, cable 2 200). The outer diameter of the conical surface on which the plurality of wedge-shaped curved surfaces 321 are distributed can be no greater than the inner diameter of the conical surface 41, and the outer diameter of the flared end is greater than the inner diameter of the flared end of the inner conical surface 41.

[0045] The wedge-shaped curved surface 321 is a convex curved surface formed by extending along the axial direction of the ring body 31 in the length direction and extending obliquely outward in the radial direction and extending along the circumferential direction in the width direction. Figures 1 to 4 As shown, the axial section view of the wedge-shaped curved surface 321 is a slanted line, which shows that its length extension direction is inclined toward the outside relative to the axial extension direction. Figure 5 As shown, a top view of the wedge-shaped curved surface 321 is shown, and it can be seen that both ends of the wedge-shaped curved surface 321 are in arc shape.

[0046] The rubber pad 33 protrudes radially outward relative to the inner side surface of the pressure arm 32. When the pressure arm 32 gradually approaches the axial centerline side of the clamping member 30, the rubber pad 33 can contact the rubber of the cable, and can be elastically deformed under pressure and tightly attached to the rubber of the cable, and can generate a large static friction resistance between the pressure arm 32 and the cable, so that the clamping member 30 can firmly hold the cable. The rubber pad 33 itself is preferably made of an insulating material with a large friction resistance, such as a rubber material. Resistance patterns or convex points can be set on the outer surface of the rubber pad 33 (i.e., the surface in contact with the rubber of the cable) to increase the contact friction resistance.

[0047] The inner side surface of the pressing arm 32 may be an arc-shaped surface that can be distributed on the same inner conical surface, and the flared end of the inner conical surface is directed inward. In this way, when the tightening cylinder 40 pushes the pressing arm 32 radially inward, the rubber pad 33 can undergo a relatively greater elastic deformation, and the radial pressure acting on the cable is greater, thereby increasing the static friction resistance.

[0048] The two tightening cylinders 40 are respectively mounted outside the two clamping members 30, and the axial extension length of the tightening cylinder 40 is less than the axial extension length of the clamping member 30. The axial extension length of the tightening cylinder 40 may be greater than the axial extension length of the pressing arm 32. An inner conical surface 41 with a flared end facing outward is formed on one end of the axial cavity of the tightening cylinder 40.

[0049] The two screw rings 50 are matched with the two ring bodies 31 through the thread structure. Specifically, the outer peripheral surface of the ring body 31 is formed with an outer thread surface 2 311, so that the screw ring 50 is matched with the outer thread surface 2 311. The outer thread surface 2 311 should have a long axial extension length, so that when the screw ring 50 is screwed to move axially relative to the ring body 31, it can fully push the tightening cylinder 40 to move axially toward the free end of the pressure arm 32, so that the inner conical surface 41 contacts and matches with the wedge-shaped curved surface 321 (the conical surface where it is located), and gradually push the multiple pressure arms 32 to gather in the direction close to the axis of the clamping member 30 at the same time, so that the rubber pad 33 is gradually pressed on the outer surface of the cable 1 100 or the outer surface of the cable 2 200, and finally the pressure arm 32 is tightly pressed on the rubber of the cable, so that the two clamping members 30 are fixedly connected with the cable 1 100 and the cable 2 200 respectively to form a whole.

[0050] An axial hole is formed on the bottom wall of the end cap 60, and an axial cylinder 61 is formed at one end facing the barrel cap 20. An external thread surface 3 611 is formed at the end of the outer peripheral surface of the axial cylinder 61. The external thread surface 3 611 can be matched with the internal thread through hole 21 on the barrel cap 20 to fix the end cap 60 on the barrel cap 20. The free ends of the cable 1 100 and the free ends of the cable 2 200 pass through the axial holes on the two end caps 60 and extend to the outside.

[0051] The two springs 70 are respectively mounted on the free end sides of the two ring bodies 31 .

[0052] The tube cap 20 can simultaneously seal the clamping member 30, the tightening tube 40, the screw ring 50 and the spring 70 at the same end (left or right end) in the axial cavity of the outer tube 10, and keep the spring 70 in a compressed state. The spring 70 can exert an elastic thrust on the ring body 31 of the clamping member 30.

[0053] The inner tube 80 is disposed between the two clamping members 30 , and both ends of the inner tube 80 are fixedly connected to the ends of the pressure arms 32 on the two clamping members 30 .

[0054] After the butt ends of the cable 100 and the cable 200 are connected by the electrical connector 300, the electrical connector 300 is generally arranged to correspond to the middle of the axial cavity of the inner tube 80. The free end / left end of the cable 100 passes through the axial hole on the clamping piece 30, the spring 70, the end cap 60 or the through hole on the barrel cap 20 at the left end of the outer tube 10 and then extends toward the outside of the cable connector; the free end / right end of the cable 200 passes through the axial hole on the clamping piece 30, the spring 70, the end cap 60 or the through hole on the barrel cap 20 at the right end of the outer tube 10 and then extends toward the outside of the cable connector.

[0055] Embodiment 1: Figures 1 to 3 As shown, a light cylinder 312 is formed at the outer end of the ring body 31. The free end of the light cylinder 312 can be maintained in a state of being inserted into the barrel cavity of the axial barrel 61. The spring 70 is arranged in the barrel cavity of the axial barrel 61, with one end in contact with the inner bottom surface of the axial barrel 61, and the other end in contact with the free end surface of the light cylinder 312. The compression degree of the spring 70 can be adjusted by screwing the end cap 60. The stretching elastic force generated by the compression of the spring 70 can act on the end of the light cylinder 312, forming a pushing force acting on the clamping member 30.

[0056] An elastic ring 612 is sleeved on the axial cylinder 61 of the end cap 60. When the end cap 60 is screwed to make it close to the barrel cap 20, the elastic ring 612 can be clamped between the end cap 60 and the barrel cap 20 to play a sealing role.

[0057] Embodiment 2: Figure 4 As shown, the main difference between the embodiment described above is the setting position of the spring 70. In this embodiment, the end cap 60 may not be provided, and the compression degree of the spring 70 can be adjusted by adjusting the axial matching position between the barrel cap 20 and the outer tube 10. Figure 4 In the illustrated scheme, an end cap 60 is provided, and one end of the spring 70 contacts the end face of the axial cylinder 61 of the end cap 60 , and the other end contacts the end face of the screw ring 50 , so that the elastic stretching force is transmitted to the clamping member 30 through the screw ring 50 .

[0058] By comparing the first embodiment with the second embodiment, it can be seen that the outer diameter of the spring 70 that can be configured when the first embodiment is selected is smaller than the outer diameter of the spring 70 that can be configured when the second embodiment is selected. In addition, by configuring the end cap 60 and keeping the end of the optical cylinder 312 inserted into the axial cylinder 61, the outer end side of the ring body 31 can be supported, which is conducive to better transmission of the elastic extension force of the spring 70 along the axial direction, so that the spring 70 can fully exert its damping effect.

[0059] In order to reduce the resistance when the pressing arm 32 moves toward the axis direction close to the clamping member 30, and reduce the internal stress when the root of the pressing arm 32 is elastically deformed, an elastic deformation part 1 322 is formed at the root of the pressing arm 32, and the elastic deformation part 1 322 can make the pressing arm 32 relatively easy to elastically deform at its root, so as to reduce the resistance when pushing the pressing arm 32 to move, and can relatively easily adjust the rubber pad 33 to a state of sufficient contact with the rubber of the cable.

[0060] In the embodiment of the present invention, the two clamping members 30 arranged on the left and right sides of the electrical connector 300 form two force-bearing positions fixedly combined with the cable 1 100 and the cable 2 200. When the force transmitted along the axial extension direction of the cable is transmitted to the vicinity of the electrical connector 300, the force will be mainly distributed at the position of the clamping member 30 on the left and the position of the clamping member 30 on the right. During this period, the force transmitted back and forth along the axial direction will drive the inner tube 80 and the clamping members 30, tightening tube 40, screw ring 50 and the like connected to the two ends of the inner tube 80 to reciprocate along the axial direction, and cause the springs 70 on the left and right sides to alternately produce telescopic deformation to absorb and consume the pulling energy, so that the pulling force is rapidly attenuated, which can suppress the axial vibration amplitude of the cable, significantly reduce the pulling force borne at the electrical connector 300, and effectively suppress the fluctuation frequency and fluctuation amplitude of the cyclic stress, thereby reducing its damage capacity. In addition, the inner tube 80 can also share a considerable portion of the pulling force for the electrical connector 300 , and form an intermediate piece for transmitting force between the left and right clamping members 30 and the spring 70 , thereby reducing the adverse effects of damping oscillation on the mechanical strength and electrical connection stability of the electrical connector 300 .

[0061] like Figures 1 to 6 As shown, the number of the pressing arms 32 formed on the ring body 31 is an even number and is more than four. Figure 1 , Figure 4 , Figure 5 The number of the pressing arms 32 in the embodiment shown is four. Correspondingly, a plurality of arm plates 81 extending in the axial direction are formed on the end surfaces of both ends of the inner tube 80. The number of the arm plates 81 is half of the number of the pressing arms 32, that is, Figure 1 , Figure 4 , Figure 6The number of arm plates 81 in the illustrated embodiment is two.

[0062] The two pressing arms 32 are grouped together, and the two pressing arms 32 in the same group are respectively provided with a clamping groove 323 on their opposite surfaces. Figure 5 As shown, the opposite surface of the two pressing arms 32 in a group is surface a324, and the clamping groove 323 is formed on the surface a324.

[0063] The arm plate 81 can be inserted between the opposite surfaces of the two pressure arms 32, and a locking protrusion 811 is formed on the end surface of the arm plate 81 facing the two pressure arms 32. After the arm plate 81 is fully inserted between the opposite surfaces of the two pressure arms 32, the locking protrusion 811 on the arm plate 81 can be inserted into the locking groove 323 on the pressure arm 32, so that the inner tube 80 is fixedly connected with the holding member 30 or the pressure arm 32.

[0064] like Figures 1 to 4 As shown, the detection unit 90 includes a sensor body 91 fixed on the outer wall of the inner tube 80 and an elastic deformation part 2 92. The elastic deformation part 2 92 includes an intermediate block and an elastic arm. One end of the elastic arm is connected to the intermediate block, and the other end extends to the inner wall surface of the outer tube 10. The sensor body 91 is a strain sensor, and the strain gauge part of the strain sensor is fixed on the elastic arm.

[0065] For easy assembly, a die is formed in the middle of the side wall of the outer tube 10, and a cover plate 12 is fixedly disposed in the die in a detachable manner. A V-shaped groove 121 is formed on the inner wall of the cover plate 12, so that the V-shaped groove 121 is opposite to the detection unit 90. The axial extension length and circumferential extension width of the die can provide sufficient space for the operation process of fixing the detection unit 90 on the inner tube 80.

[0066] The elastic arm portion may be in the form of an elastic plate or may be in the form of Figure 2 The two arched arms 921 shown in the figure are in the form of: one end of the elastic plate extending toward the inner wall of the outer tube 10 and one end of the two arched arms 921 extending toward the inner wall of the outer tube 10 can both contact the inner bottom surface of the V-shaped groove 121 .

[0067] When the elastic arm is an elastic plate, the initial state should make the free end of the elastic plate extend to the tip of the V-shaped groove 121; if the inner tube 80 moves axially to the left or right relative to the outer tube 10, the elastic plate can bend to the left or right, and elastic deformation in the opposite direction occurs, during which the strain gauge part can synchronously produce physical quantity changes to prompt the strain sensor to generate real-time sensing signals. It should be noted that the strain gauge part is generally only fixed on the left end face or the right end face of the elastic plate, so when the elastic plate is bent to the left and elastically deformed and bent to the right and elastically deformed, the deformation curve of the strain gauge part is different, so the displacement direction and displacement of the inner tube 80 relative to the outer tube 10 can be judged according to the sensing signal generated by the strain sensor, to judge whether the connection state of the cable is abnormal, and to provide early warning support in time.

[0068] When the elastic arm portion is two arched arms 921, the two arched arms 921 are arranged at both ends of the middle block and extend toward both sides (left and right) in the axial direction. In the initial state, the free ends of the two arched arms 921 should be in contact with the two inclined bottom surfaces 122 of the V-shaped groove 121 respectively. The outward protruding curved surfaces of the two arched arms 921 face the corresponding inclined bottom surfaces 122 respectively. Corresponding to the two arched arms 921, the sensor body 91 contains two strain sensors, and the strain gauge parts of the two strain sensors are respectively fixed on the concave curved surfaces of the two arched arms 921. At that time, if the inner tube 80 moves axially to the left or right relative to the outer tube 10, the two arch arms 921 can produce elastic deformation conditions with different degrees and different change trends. During this period, the degree and trend of changes in the physical quantities of the two strain gauge parts are different, which can prompt the two strain sensors to generate real-time sensing signals with significant differences. The sensing signals generated by the two strain sensors can be better used to judge the offset direction and offset amount of the inner tube 80 relative to the outer tube 10, to judge whether the connection status of the cable is abnormal, and to provide early warning support and maintenance support in a timely and effective manner.

[0069] like Figure 2 As shown, when the inner tube 80 moves toward the left side relative to the outer tube 10, the bending degree of the arched arm 921 on the left side gradually increases, while the bending degree of the arched arm 921 on the right side gradually decreases, so there is a significant difference in the magnitude of the change in physical quantities generated by the strain gauge parts on the two arched arms 921, and the change trends are opposite, that is, one gradually increases and the other gradually decreases.

[0070] The detection unit 90 of the present invention has a sensor body 91 that can be connected to a remote management terminal / mobile terminal (APP) wirelessly or wiredly. After receiving the sensing signal fed back by the sensor body 91, the remote management terminal / mobile terminal (APP) can process the sensing signal to form a vibration signal, such as a frequency signal and an amplitude signal, and can judge whether the connection state of the cable is stable and reliable, and whether there is a fault such as excessive looseness or breakage by comparing the real-time vibration signal with a pre-set vibration signal warning threshold.

[0071] The detection unit 90 may include a processor that can directly receive and process the sensor signal fed back by the sensor body 91, and transmit the processing result to the remote management terminal / mobile terminal (APP). The specific processing method of the sensor signal fed back by the sensor body 91 and the method of judging the cable connection state / condition based on the processing result are not related to the core innovation of the present invention. In combination with the hardware structure of the present invention, those skilled in the art can create a variety of processing methods for sensor signals and analysis and judgment methods for connection status according to their own clear technical purposes, so they will not be elaborated.

[0072] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. The present invention can be improved in many aspects without violating the overall concept, and those familiar with the technology can modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A cable connector, characterized in that: It comprises an outer tube (10), a pair of tube caps (20), a pair of clamping members (30), a pair of tightening tubes (40), a pair of spiral rings (50), a pair of springs (70) and an inner tube (80); Two tube caps (20) are respectively fixed to two ends of the outer tube (10), and a through hole is formed on the bottom wall of the tube cap (20); The two clamping members (30) are arranged at opposite ends of the axial cavity of the outer tube (10), and each comprises a ring body (31), a plurality of pressure arms (32) arranged on an end surface of one end of the ring body (31), and a rubber pad (33) fixed on the inner side surface of each pressure arm (32); the plurality of pressure arms (32) are alternately distributed around the circumferential direction; the outer side surface of the pressure arm (32) is a wedge-shaped curved surface (321), and the plurality of wedge-shaped curved surfaces (321) on the same clamping member (30) can be distributed on the same conical surface, and the flared end of the conical surface faces the end side away from the ring body (31); The two tightening cylinders (40) are respectively sleeved outside the two clamping members (30), and the axial extension length of the tightening cylinders (40) is smaller than the axial extension length of the clamping members (30); an inner conical surface (41) with a flared end facing outward is formed at one end of the axial cavity of the tightening cylinder (40); The two spiral rings (50) are matched with the two ring bodies (31) respectively through the threaded structure, and can drive the tightening tube (40) to move axially toward the free end of the pressing arm (32), so as to cause the inner conical surface (41) to contact and match with the wedge-shaped curved surface (321), thereby causing the multiple pressing arms (32) to simultaneously retract in a direction close to the axis of the clamping member (30); The two springs (70) are respectively arranged on the free end sides of the two ring bodies (31); the tube cap (20) can simultaneously seal the clamping member (30), the tightening tube (40), the spiral ring (50) and the spring (70) arranged on the same end in the axial cavity of the outer tube (10), and keep the spring (70) in a compressed state; the spring (70) can exert an elastic thrust on the clamping member (30); The inner tube (80) is disposed between the two clamping members (30), and the two ends of the inner tube (80) are respectively fixedly connected to the ends of the pressure arms (32) on the two clamping members (30); An electrical connector (300) for connecting two cables is correspondingly arranged in the axial cavity of the inner tube (80); the free end of one cable passes through a through hole on a clamping member (30), a spring (70) and a tube cap (20) arranged at one end of the outer tube (10) and then extends toward the outside; the free end of the other cable passes through a through hole on a clamping member (30), a spring (70) and a tube cap (20) arranged at the other end of the outer tube (10) and then extends toward the outside.

2. The cable connector according to claim 1, characterized in that: An elastic deformation portion 1 (322) is formed at the root of the pressing arm (32), and the elastic deformation portion 1 (322) can cause the pressing arm (32) to generate elastic deformation at its root.

3. The cable connector according to claim 1, characterized in that: The number of pressure arms (32) formed on the same ring body (31) is an even number and is greater than four; correspondingly, a plurality of arm plates (81) extending in the axial direction are respectively formed on the end surfaces at both ends of the inner tube (80), and the number of the arm plates (81) is half the number of the pressure arms (32); Two pressing arms (32) form a group, and clamping grooves (323) are respectively formed on the opposite surfaces of the two pressing arms (32) in the same group; The arm plate (81) can be inserted between the opposite surfaces of the two pressure arms (32) in a group, and a latching protrusion (811) is formed on the end surface of the arm plate (81) facing the two pressure arms (32). The latching protrusion (811) on the arm plate (81) can be inserted into the latching groove (323) to fix the inner tube (80) and the pressure arm (32) together.

4. The cable connector according to claim 1, characterized in that: It also includes two end caps (60) respectively matching the two barrel caps (20); the through hole formed on the bottom wall of the barrel cap (20) is an internal threaded through hole (21); An axial hole is formed on the bottom wall of the end cap (60), and an axial cylinder (61) is formed on the end surface of the end cap (60) facing the cylinder cap (20); an external threaded surface (611) is formed on the outer peripheral surface of the axial cylinder (61); The external thread surface three (611) matches the internal thread through hole (21) to fix the end cap (60) and the tube cap (20) together; the cable can pass through the axial hole on the end cap (60) and extend to the outside; One end of the spring (70) contacts the end cap (60), and the other end contacts the end surface of the ring body (31) or the end surface of the spiral ring (50); the compression degree of the spring (70) can be adjusted by screwing the end cap (60).

5. The cable connector according to claim 4, characterized in that: An axially extending light column (312) is formed on the free end side of the ring body (31), so that the light column (312) can remain inserted into the barrel cavity of the axial barrel body (61); The spring (70) is arranged in the axial cylinder (61) and its two ends are respectively in contact with the inner bottom surface of the axial cylinder (61) and the end surface of the ring body (31).

6. The cable connector according to claim 4, characterized in that: The spring (70) is sleeved on the free end side of the ring body (31), so that one end of the spring (70) contacts the end surface of the axial cylinder (61) and the other end contacts the end surface of the spiral ring (50); the compression degree of the spring (70) can be adjusted by screwing the end cap (60).

7. The cable connector according to claim 1, characterized in that: The spring (70) is sleeved on the free end side of the ring body (31), so that one end of the spring (70) contacts the inner bottom surface of the tube cap (20) and the other end contacts the end surface of the screw ring (50); the compression degree of the spring (70) can be adjusted by screwing the tube cap (20).

8. The cable connector according to claim 1, characterized in that: It also includes a detection unit (90); the detection unit (90) includes a sensor body (91) fixed on the inner tube (80) and a second elastic deformation part (92); the second elastic deformation part (92) includes an intermediate block and an elastic arm; one end of the elastic arm is connected to the intermediate block, and the other end extends toward the inner wall surface of the outer tube (10); the sensor body (91) is a strain sensor; the strain gauge part of the strain sensor is fixed on the elastic arm; A die is formed in the middle of the side wall of the outer tube (10), and a cover plate (12) is fixedly arranged in the die; a V-shaped groove (121) is formed on the inner wall of the cover plate (12); one end of the elastic arm portion extending toward the inner wall of the outer tube (10) contacts the inner bottom surface of the V-shaped groove (121), so that when the inner tube (80) moves axially relative to the outer tube (10), the elastic arm portion can generate elastic deformation, thereby causing the strain gauge portion to generate a physical quantity change synchronously.

9. The cable connector according to claim 8, characterized in that: The elastic arm portion comprises two arched arms (921); the two arched arms (921) are correspondingly arranged at two ends of the middle block and extend towards two sides in the axial direction respectively; The free ends of the two arched arms (921) are in contact with the two inclined bottom surfaces (122) of the V-shaped groove (121), respectively, and the outwardly protruding curved surfaces of the two arched arms (921) face the corresponding inclined bottom surfaces (122). The sensor body (91) contains two strain sensors, and the strain gauge parts of the two strain sensors are respectively fixed on the inner concave surfaces of the two arched arms (921); when the inner tube (80) moves axially relative to the outer tube (10), the two arched arms (921) can simultaneously generate elastic deformation, thereby causing the two strain gauge parts to synchronously generate physical quantity changes.

Images