Cable connector

Abstract

The present invention belongs to the technical field of cable installation, and specifically relates to a cable connector, including an outer tube, paired tube caps, a clamping piece, a tightening tube, a spiral ring and a spring, and an inner tube. The tube caps are fixed at both ends of the outer tube. The clamping piece includes a ring body, a plurality of pressure arms and a rubber pad arranged on the pressure arms. The outer side surface of the pressure arm is a wedge-shaped curved surface and the plurality of wedge-shaped curved surfaces can be distributed on the same conical surface. The tightening tube is sleeved on the clamping piece and an inner conical surface is formed at the end of its tube cavity. The spiral ring matches the ring body and can push the tightening tube to move, so that the inner conical surface pushes the pressure arm to close in the direction close to the axis of the clamping piece. The spring is arranged on the free end side of the ring body and can apply an elastic thrust on the clamping piece. The inner tube is arranged between the clamping pieces, and the two ends are respectively fixedly connected to the pressure arms on the two clamping pieces. The electric connector is placed in the tube cavity of the inner tube. The present invention can improve the stress condition at the electric connector, and help to improve the connection stability and reliability of the cable at the electric connector position.

Description

Technical Field

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

[0002] Between the butt ends of two cables, an electrical connection terminal (hereinafter referred to as an electrical connector) is usually used for connection to establish an electrical connection relationship between the two cables and form a continuous line by connecting multiple cables, for the purpose of being erected between power or communication facilities. With the progress of communication technology, the laying and application of communication cables are becoming more and more extensive. According to different usage purposes and installation scenarios, there are various laying methods for communication cables, such as overhead, buried, pipeline, and underwater. A large number of communication cables used in the process of railway construction are mostly laid in an overhead or pipeline manner. Whether it is an overhead cable line or a cable line laid through a pipeline, at the butt electrical connector of two cables, it is liable to be affected by the downward force generated by the self-weight of the cable, the vibration and dragging effects caused by peripheral facilities, and the swaying effect caused by strong winds, etc., resulting in poor connection firmness and stability of the electrical connector.

[0003] In the prior art, the connection stability at the cable butt end is mainly ensured by the strength of the electrical connector itself, and particularly depends on the mechanical properties such as the tensile strength and toughness of the mechanical connection components on the electrical connector to resist the acting force conducted along the axial direction of the cable when the cable is subjected to external forces such as pulling and dragging. This axially conducted acting force will cause the cable itself and the electrical connectors arranged in the cable line to bear cyclic stress. Compared with the cable itself, the electrical connector at the cable butt end is a relatively weak position and a stress concentration position, and is more likely to become a fault point in the entire line. After the cable line is laid and operates for a long time, at the electrical connector, due to the long-term and frequent external pulling and dragging, the strength of the mechanical connection components on the electrical connector is liable to be damaged under the cyclic stress, and faults such as mechanical connection looseness, fracture, unstable electrical connection, and failure are likely to occur 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 help 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 problems is: a cable connector, comprising an outer tube, two barrel caps, two clamping members, two tightening cylinders, two screw rings, two springs, and an inner tube. The inner tube is relatively arranged at the central position of the axial cavity of the outer tube. Preferably, the outer diameter of the inner tube is smaller than the inner diameter of the outer tube, so that a radial distance can be formed between the relative circumferential surfaces of the inner tube and the outer tube. The two barrel caps, two clamping members, two tightening cylinders, two screw rings, and two springs are divided into two groups and are respectively arranged inside the two ends of the axial cavity of the outer tube.

[0006] Two barrel caps are respectively fixed at both ends of the outer tube through a threaded structure, and through holes are formed on the bottom walls of the barrel caps.

[0007] Two clamping members are relatively arranged at both ends of the axial cavity of the outer tube, that is, both clamping members are arranged in the axial cavity of the outer tube and are respectively close to both ends of the axial cavity of the outer tube. The clamping member includes an annular body, a plurality of pressing arms arranged on the inner end surface of the annular body, and rubber pads fixedly arranged on the inner side surfaces of the respective pressing arms. The plurality of pressing arms are distributed at intervals in the circumferential direction. The outer side surface of the pressing arm is a wedge-shaped curved surface, and the plurality of wedge-shaped curved 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 at the end side away from the annular body, that is, the flared end of the conical surface / conical annular surface corresponds to the free end of the pressing arm.

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

[0009] Two screw rings are respectively matched with the two annular bodies through a threaded structure, and can drive the tightening cylinder to move axially towards the free end direction of the pressing arm, so as to prompt the inner conical surface to be in contact and match with the wedge-shaped curved surface. During this period, the pressing arm can be pushed to move in the radial direction, and the plurality of pressing arms can be simultaneously closed towards the direction close to the axis line of the clamping member, forcing the pressing arm to gradually hold the cable tightly, so that the clamping member is fixedly connected with the cable.

[0010] Two springs are respectively sleeved on the free end side / outer end side of the two annular bodies.

[0011] The barrel cap can simultaneously block the clamping member, the tightening cylinder, the screw 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 apply an elastic thrust on the clamping member.

[0012] The inner tube is arranged between the two clamping members, and both ends of the inner tube are respectively fixedly connected with the end parts of the pressing arms on the two clamping members.

[0013] After the butt ends of the first cable and the second cable 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 the first cable passes through the clamping member, the spring and the through hole on the barrel cap arranged at one end of the outer tube and then extends towards the outside; correspondingly, the free end of the second cable passes through the clamping member, the spring and the through hole on the barrel cap arranged at the other end of the outer tube and then extends towards the outside.

[0014] Optionally, an elastic deformation part one is formed at the root of the pressing arm, and the elastic deformation part one can cause the pressing arm to elastically deform at its root, which helps to reduce the resistance when the tightening cylinder pushes the pressing arm to move radially, and can relatively easily adjust the rubber pad to a state of being fully pressed and contacted with the rubber skin of the cable.

[0015] Optionally, the number of pressing arms formed on the same ring body is an even number and more 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 of the number of pressing arms on the corresponding matching ring body.

[0016] Two pressing arms are taken as a group, and clamping grooves are respectively formed on the opposite faces of the two pressing arms in the same group. The arm plate can be inserted between the opposite faces of the two pressing arms in a group, and clamping protrusion bodies are respectively formed on the end faces of the arm plate facing the two pressing arms. When the arm plate is inserted between the two pressing arms in a group, the clamping protrusion bodies on the arm plate can finally be inserted into the clamping grooves on both sides, and the inner tube and the pressing arm are plugged and fixedly connected together.

[0017] Optionally, a pair of end caps is further included, and the two end caps are respectively correspondingly matched with the two barrel caps. 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 barrel body is formed on the end face of the end cap facing the barrel cap. An external thread surface three is formed on the outer peripheral surface of the axial barrel body. The external thread surface three is matched with the internal thread through hole, and the end cap and the barrel cap are fixedly connected. The cable can pass through the axial hole on the end cap and extend to the outside.

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

[0020] Optionally, an axially extending light column surface is formed on the free end side of the ring body, and the light column surface can be kept inserted in the barrel cavity of the axial barrel body.

[0021] The spring is arranged in the axial barrel body and both ends respectively contact with the inner bottom surface of the axial barrel body and the free end face of the ring body.

[0022] Optionally, the spring is sleeved on the free end side of the ring body. One end of the spring contacts the end face of the screw ring. The other end of the spring either contacts the end face of the axial cylinder or contacts the inner bottom surface of the barrel 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. At this time, screwing the end cap can adjust the compression degree of the spring, so as to realize the regulation of the elastic thrust exerted by the spring on the clamping member. When the end cap is not provided, the other end of the spring is made to contact the inner bottom surface of the barrel cap. At this time, screwing the barrel cap can adjust the compression degree of the spring, so as to realize the regulation of the elastic thrust exerted by the spring on the clamping member.

[0023] Optionally, it further includes a detection unit. The detection unit includes a sensor body fixed on the inner tube and an elastic deformation part II.

[0024] The elastic deformation part II includes an intermediate block and elastic arm parts. One end of the elastic arm part is connected to the intermediate block, and the other end extends towards 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 part.

[0025] A mold opening is formed in the middle of the side wall of the outer tube, and a cover plate is fixedly provided in the mold opening. A V-shaped groove is formed on the inner wall of the cover plate. The end of the elastic arm part extending towards the inner wall of the outer tube contacts the inner bottom surface of the V-shaped groove. When the inner tube moves axially relative to the outer tube, the elastic arm part can elastically deform, so as to cause the strain gauge part to synchronously generate physical quantity changes. During this period, the sensing signal generated by the strain sensor will change in real time.

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

[0027] The sensor body 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. When the inner tube moves axially relative to the outer tube, the two arched arms can simultaneously elastically deform, so as to cause the two strain gauge parts to synchronously generate physical quantity changes. 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 degrees and trends of elastic deformation generated by the two arched arms are different. Therefore, the physical quantity changes generated by the two strain gauge parts are also different. Correspondingly, the sensing signals generated by the two strain sensors will have significant differences, which is conducive to judging the direction of axial movement of the inner tube, the oscillation frequency, amplitude and other conditions. This not only helps to improve the accuracy of judging whether the connection state of the cable is abnormal, but also facilitates the analysis of the abnormal conditions that occur 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, which helps to enhance the mechanical connection reliability and electrical connection stability of the two cables at the electrical joint.

[0029] In the embodiment of the present invention, axial forces such as pulling and dragging conducted along the cable will be damped on both outer sides of the electrical joint, causing the force finally acting on the electrical joint to be significantly attenuated. This helps to prevent the electrical joint from being subjected to excessive pulling force and suffering serious mechanical damage, and can ensure the electrical connection stability and mechanical connection reliability of the electrical joint. At the same time, the stress distribution range caused by the axial force conducted along the cable on the cable will shift to the outer sides of both ends of the electrical joint and be dissipated and attenuated over a longer distance, which can improve the cyclic stress condition borne by the cable itself and the electrical joint, and can effectively inhibit serious stress damage, or even faults such as fracture, from occurring at the electrical joint.

[0030] Therefore, the present invention helps to ensure the reliability, stability and safety of the cable line operation. In addition, the structure of the cable connector involved in the present invention is relatively simple, and it is convenient, fast to install and use, and can be well compatible with the existing electrical joints. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of Embodiment 1 of the present invention.

[0032] Figure 2 It is Figure 1 a partial enlarged structural diagram at A in

[0033] Figure 3 It is a half-side split schematic diagram of the structure of Embodiment 1 of the present invention.

[0034] Figure 4 It is a schematic structural diagram (half-side) of Embodiment 2 of the present invention.

[0035] Figure 5 It is a side view structural diagram of the clamping member.

[0036] Figure 6 It is a side view structural diagram of the inner tube.

[0037] In the figure: 10 outer tube, 11 first external thread surface, 12 cover plate, 121 V-shaped groove, 122 inclined bottom surface; 20 barrel cap, 21 internal thread through hole, 22 internal thread counterbore; 30 clamping member, 31 ring body, 311 second external thread surface, 312 light column surface, 32 pressing arm, 321 wedge-shaped curved surface, 322 first elastic deformation part, 323 clamping groove, 324 surface a, 33 rubber pad; 40 tightening cylinder, 41 inner conical surface; 50 screw ring; 60 end cap, 61 axial cylinder body, 611 third external thread surface, 612 elastic ring; 70 spring; 80 inner tube, 81 arm plate, 811 clamping protrusion; 90 detection unit, 91 sensor body, 92 second elastic deformation part, 921 arched arm; 100 first cable; 200 second cable; 300 electrical connector. Detailed implementation mode

[0038] The structures, ratios, sizes, etc. shown in the accompanying drawings of the specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the implementation conditions of the present invention. Therefore, they do not have technical substance significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "front", "rear", "middle" and the like cited in this specification are only for the convenience of clear narration, and are not used to limit the scope of implementation of the present invention. The change or adjustment of their relative relationship, without substantial change in technical content, should also be regarded as the scope of implementation of the present invention.

[0039] As Figures 1 to 6 A cable connector as shown includes an outer tube 10, a pair of barrel caps 20, a pair of clamping members 30, a pair of tightening cylinders 40, a pair of screw rings 50, a pair of end caps 60, a pair of springs 70, as well as an inner tube 80 and a detection unit 90.

[0040] The inner diameter of the inner tube 80 is larger than the outer diameters of the mutually butted first cable 100 and the second cable 200 to ensure that the electrical connector 300 connecting the first cable 100 and the second cable 200 can be smoothly placed into the axial cavity of the inner tube 80.

[0041] At the left and right ends of the outer tube 10, first external thread surfaces 11 are respectively formed, and the first external thread surfaces 11 have a relatively long extension length along the axial direction.

[0042] An internal thread through hole 21 is formed on the bottom wall of the barrel cap 20, and an internal thread counterbore 22 is formed at the outer end of the axial cavity of the barrel cap 20. The 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 the matching of the first external thread surfaces 11 and the internal thread counterbores 22.

[0043] Two clamping members 30 are relatively arranged on the inner sides of both ends of the axial cavity of the outer tube 10 in the left and right directions. Each clamping member 30 at each end is provided with a tightening cylinder 40, a screw ring 50, an end cap 60, and a spring 70.

[0044] The clamping member 30 includes a ring body 31, four pressing arms 32 arranged on the inner end surface of the ring body 31, and rubber pads 33 fixedly arranged on the inner side surfaces of the respective pressing arms 32. The four pressing arms 32 are evenly distributed at intervals in the circumferential direction. The outer side surfaces of the pressing arms 32 are all wedge-shaped curved surfaces 321, and the wedge-shaped curved surfaces 321 of the four pressing arms 32 arranged on the same clamping member 30 are distributed on the same conical surface / conical ring surface, and the flared end of the conical surface / conical ring surface faces the side away from the ring body 31. At this time, after the assembly is completed, the free ends of the pressing arms 32 on the two clamping members 30 are opposite, and the flared ends of the conical surfaces / conical ring surfaces where the wedge-shaped curved surfaces 321 of the multiple pressing arms 32 on the left side are distributed are opposite to the flared ends of the conical surfaces / conical ring surfaces where the wedge-shaped curved surfaces 321 of the multiple pressing arms 32 on the right side are distributed.

[0045] The inner diameter of the ring body 31 is not less than the outer diameter of the cable (i.e., cable one 100, cable two 200). It is possible to make the outer diameter of the constricted end of the conical surface on which the multiple wedge-shaped curved surfaces 321 are distributed not greater than the inner diameter of the constricted end of the inner conical surface 41, and at the same time, the outer diameter of the flared end is greater than the inner diameter of the flared end of the inner conical surface 41.

[0046] The wedge-shaped curved surface 321 extends in the axial direction of the ring body 31 in the length direction, and at the same time extends obliquely outward in the radial direction and extends in the circumferential direction in the width direction, forming a convex curved surface. As Figures 1 to 4 shown, the axial sectional view of the wedge-shaped curved surface 321 is a slant line, which is to show the state that its length extension direction extends obliquely outward relative to the axial extension direction. As Figure 5 shown, the 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 arc-shaped.

[0047] The rubber pad 33 protrudes radially outward relative to the inner side surface of the pressing arm 32. When the pressing arm 32 gradually approaches the axis line side of the clamping member 30, the rubber pad 33 can contact the rubber skin of the cable and can be elastically deformed under pressure to closely adhere to the rubber skin of the cable, and a large static friction resistance can be generated between the pressing arm 32 and the cable, so that the clamping member 30 firmly holds the cable. The rubber pad 33 itself is preferably made of an insulating material with a large frictional resistance, such as rubber material can be used. Resistance lines or bumps can be provided on the outer side surface of the rubber pad 33 (i.e., the surface in contact with the rubber skin of the cable) to increase the contact friction resistance.

[0048] The inner side surface of the pressing arm 32 can be an arc-shaped curved surface that can be distributed on the same inner conical surface, and the flared end of the inner conical surface faces inward. In this way, when the tightening cylinder 40 is pushed radially inward against the pressing arm 32, the rubber pad 33 can undergo a relatively larger amount of elastic deformation, and the radial pressure acting on the cable is greater, thereby increasing the static friction resistance.

[0049] Two tightening cylinders 40 are respectively sleeved outside the two holding members 30, and the axial extension length of the tightening cylinder 40 is less than the axial extension length of the holding member 30. The axial extension length of the tightening cylinder 40 can be greater than the axial extension length of the pressing arm 32. On the axial cavity of the tightening cylinder 40, an inner conical surface 41 with a flared end facing outward is formed at one end side.

[0050] Two screw rings 50 are respectively matched with the two ring bodies 31 through a threaded structure. Specifically, an external thread surface two 311 is formed on the outer peripheral surface of the ring body 31, so that the screw ring 50 is correspondingly matched with the external thread surface two 311. The external thread surface two 311 should have a relatively 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 towards the free end direction of the pressing arm 32, making the inner conical surface 41 contact and match with the wedge-shaped curved surface 321 (the conical surface where it is located), and gradually pushing the plurality of pressing arms 32 to simultaneously converge towards the axis line direction of the holding member 30, prompting the rubber pad 33 to gradually press against the outer surface of the cable one 100 or the outer surface of the cable two 200, and finally making the pressing arm 32 tightly hold and press on the rubber skin of the cable, so that the two holding members 30 are respectively fixedly connected to the cable one 100 and the cable two 200 to form a whole.

[0051] An axial hole is formed on the bottom wall of the end cap 60, and an axial cylinder body 61 is formed at one end facing the cylinder cap 20. An external thread surface three 611 is formed at the outer peripheral surface end of the axial cylinder body 61. The external thread surface three 611 can be correspondingly matched with the internal thread through hole 21 on the cylinder cap 20 to fix the end cap 60 on the cylinder cap 20. The free ends of the cable one 100 and the cable two 200 respectively pass through the axial holes on the two end caps 60 and extend to the outside.

[0052] Two springs 70 are respectively sleeved on the free end sides of the two ring bodies 31.

[0053] The cylinder cap 20 can simultaneously seal the holding member 30, the tightening cylinder 40, the screw ring 50 and the spring 70 at the same end (left end 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 apply an elastic thrust on the ring body 31 of the holding member 30.

[0054] The inner tube 80 is arranged between two clamping members 30, and both ends of the inner tube 80 are fixedly connected to the ends of the pressing arms 32 on the two clamping members 30 respectively.

[0055] After the butt ends of the first cable 100 and the second cable 200 are connected by an electrical connector 300, generally, the electrical connector 300 is located in the middle of the axial cavity of the inner tube 80. The free end / left end of the first cable 100 passes through the axial holes on the clamping member 30, spring 70, end cap 60 provided at the left end of the outer tube 10 or the through hole on the barrel cap 20 and extends towards the outside of the cable connector; the free end / right end of the second cable 200 passes through the axial holes on the clamping member 30, spring 70, end cap 60 provided at the right end of the outer tube 10 or the through hole on the barrel cap 20 and extends towards the outside of the cable connector.

[0056] Example 1: As Figures 1 to 3 shown, a light column surface 312 is formed at the outer end of the ring body 31. The free end of the light column surface 312 can be kept 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, one end contacts the inner bottom surface of the axial barrel 61, and the other end contacts the end face of the free end of the light column surface 312. Screwing the end cap 60 can adjust the compression degree of the spring 70. The stretching elastic force generated after the spring 70 is compressed can act on the end of the light column surface 312 to form a pushing force acting on the clamping member 30.

[0057] An elastic ring 612 is sleeved on the axial barrel 61 of the end cap 60. When screwing the end cap 60 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.

[0058] Example 2: As Figure 4 shown, the main difference from the above example lies in the setting position of the spring 70. In this example, the end cap 60 can be not 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 shown solution, an end cap 60 is provided, and one end of the spring 70 contacts the end face of the axial barrel 61 of the end cap 60, and the other end contacts the end face of the screw ring 50. The elastic stretching acting force is transmitted to the clamping member 30 through the screw ring 50.

[0059] Comparing Comparative Example 1 and Example 2, it can be seen that the outer diameter of the spring 70 that can be configured when Example 1 is selected is smaller than the outer diameter of the spring 70 that can be configured when Example 2 is selected. In addition, by configuring the end cap 60 and keeping the end of the light column surface 312 inserted into the axial cylinder 61, a support can be formed on the outer end side of the ring body 31, which is beneficial to the better axial transmission of the elastic stretching force of the spring 70, and promotes the spring 70 to fully exert its damping effect.

[0060] To reduce the resistance when the pressing arm 32 moves towards the axis line of the clamping member 30 and reduce the internal stress when elastic deformation occurs at the root of the pressing arm 32. An elastic deformation portion 322 is formed at the root of the pressing arm 32. The elastic deformation portion 322 can enable the pressing arm 32 to relatively easily generate elastic deformation 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 where it is in full contact with the rubber skin of the cable.

[0061] In the embodiment of the present invention, the two clamping members 30 provided on the left and right sides of the electrical connector 300 form two force-bearing positions fixedly combined with the cable one 100 and the cable two 200. When the acting force transmitted along the axial extension direction of the cable reaches near the electrical connector 300, the acting force will be mainly distributed at the position of the clamping member 30 on the left side and the position of the clamping member 30 on the right side. During this period, the acting force reciprocally conducted along the axis will drive the inner tube 80 and the clamping members 30, the tightening cylinder 40, the screw ring 50, etc. connected to both ends of the inner tube 80 to reciprocally move along the axis, and cause the left and right springs 70 to alternately generate telescopic deformation, so as to absorb and consume the pulling energy, rapidly attenuate the pulling force, suppress the axial vibration amplitude of the cable, significantly reduce the pulling force borne by the electrical connector 300, and effectively suppress the fluctuation frequency and amplitude of the cyclic stress, thereby reducing its damage ability. In addition, the inner tube 80 can also share a considerable part of the pulling force for the electrical connector 300, and form an intermediate member for conducting the force of the clamping members 30 and the springs 70 on the left and right sides, which can reduce the adverse effects of the damped oscillation on the mechanical strength and electrical connection stability of the electrical connector 300.

[0062] As Figures 1 to 6 shown, the number of the pressing arms 32 formed on the ring body 31 is an even number and more than four. Figure 1 、 Figure 4 、 Figure 5 In the shown scheme, the number of the pressing arms 32 is four. Correspondingly, a plurality of arm plates 81 extending in the axial direction are respectively formed on the end faces at 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 the arm plates 81 in the shown solution is two.

[0063] The pairwise pressing arms 32 are grouped in pairs, and clamping grooves 323 are respectively formed on the opposite faces of the two pressing arms 32 in the same group. As Figure 5 shown, the opposite faces of the two pressing arms 32 in the group are face a324, and the clamping grooves 323 are formed on the face a324.

[0064] The arm plate 81 can be inserted between the opposite faces of the two pressing arms 32 in the group, and clamping protrusion bodies 811 are respectively formed on the end faces of the arm plate 81 facing the two pressing arms 32. After the arm plate 81 is fully inserted between the opposite faces of the two pressing arms 32 in the group, the clamping protrusion bodies 811 on the arm plate 81 can be inserted into the clamping grooves 323 on the pressing arms 32, so as to fixedly connect the inner tube 80 with the clamping member 30 or rather with the pressing arms 32 together.

[0065] As Figures 1 to 4 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 two 92. The elastic deformation part two 92 includes an intermediate block and elastic arm parts. One end of the elastic arm part is connected to the intermediate block, and the other end extends towards 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 part.

[0066] For the convenience of assembly, a mold opening is formed in the middle of the side wall of the outer tube 10, and a cover plate 12 is fixedly arranged in the mold opening in a detachable manner. A V-shaped groove 121 is formed on the inner wall of the cover plate 12, and the V-shaped groove 121 faces the detection unit 90. The axial extension length and circumferential extension width of the mold opening can provide sufficient space for the operation process of fixing the detection unit 90 on the inner tube 80.

[0067] The elastic arm part can be in the form of an elastic plate, or in the form of two arched arms 921 as Figure 2 shown. One end of the elastic plate extending towards the inner wall of the outer tube 10 and one end of each of the two arched arms 921 extending towards the inner wall of the outer tube 10 can contact the inner bottom surface of the V-shaped groove 121.

[0068] When the elastic arm part is an elastic plate, in the initial state, the free end of the elastic plate should extend to the tip of the V-shaped groove 121. At this time, if the inner tube 80 moves axially leftward or rightward relative to the outer tube 10, the elastic plate can be bent leftward or rightward, and elastic deformations with opposite deformation directions occur. During this period, the strain gauge part can synchronously generate physical quantity changes to prompt the strain type 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. Therefore, when the elastic plate bends leftward to produce elastic deformation and bends rightward to produce elastic deformation, the deformation quantity curve graphs of the strain gauge part are different. Therefore, the offset direction and offset amount of the inner tube 80 relative to the outer tube 10 can be judged according to the sensing signals generated by the strain type sensor, and whether the connection state of the cable is abnormal can be judged, and early warning support can be provided in a timely manner.

[0069] When the elastic arm part is two arched arms 921, the two arched arms 921 are arranged at both ends of the middle block and extend respectively to both sides (left side and right side) in the axial direction. In the initial state, the free ends of the two arched arms 921 should respectively contact the two inclined bottom surfaces 122 of the V-shaped groove 121. The outwardly 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 type sensors, and the strain gauge parts of the two strain type sensors are respectively fixed on the concave curved surfaces of the two arched arms 921. At this time, if the inner tube 80 moves axially leftward or rightward relative to the outer tube 10, elastic deformation conditions with different degrees and different change trends can be generated in the two arched arms 921. During this period, the physical quantity change degrees and trends occurring in the two strain gauge parts are different, and real-time sensing signals with significant differences can be prompted to be generated by the two strain type sensors. And the offset direction and offset amount of the inner tube 80 relative to the outer tube 10 can be better judged according to the sensing signals generated by the two strain type sensors, and whether the connection state of the cable is abnormal can be judged, and early warning support and maintenance support can be provided in a timely and effective manner.

[0070] As Figure 2 shown, when the inner tube 80 moves leftward relative to the outer tube 10, the bending degree of the left arched arm 921 gradually increases, while the bending degree of the right arched arm 921 gradually decreases. Therefore, there are significant differences in the magnitudes of the physical quantity changes 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.

[0071] The detection unit 90 involved in the present invention has a sensor body 91 that can be connected to a remote management terminal / mobile device (APP) wirelessly or wiredly. After receiving the sensing signal fed back by the sensor body 91, the remote management terminal / mobile device (APP) can process the sensing signal, and can process it to form vibration signals, such as vibration frequency signals and amplitude signals, and can judge whether the connection state of the cable is stable and reliable, and whether faults such as excessive loosening and breakage occur by comparing the real-time vibration signal with the preset vibration signal warning threshold.

[0072] The detection unit 90 may include a processor that can directly receive and process the sensing signal fed back by the sensor body 91 and transmit the processing result to the remote management terminal / mobile device (APP). The specific processing method of the sensing signal fed back by the sensor body 91 and the method for judging the cable connection state / condition according to the processing result are not relevant to the core innovation point of the present invention. Combining with the hardware structure of the present invention, those skilled in the art can create various processing methods for sensing signals and analysis and judgment methods for connection states according to their respective clear technical purposes, so no further elaboration is made.

[0073] The above embodiments are only illustrative of the principles and effects of the present invention, rather than limiting the present invention. There are many aspects of the present invention that can be improved without departing from the overall idea. Those familiar with this technology can modify or change the above embodiments without departing from 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 idea 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 on two ends of the outer tube (10), and a through hole is formed on the bottom wall of the tube cap (20); 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 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 expanded 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 cylinder (40) is smaller than the axial extension length of the clamping member (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 make the inner conical surface (41) contact and match with the wedge-shaped curved surface (321), so that the multiple pressing arms (32) are simultaneously retracted in the direction close to the axis of the clamping member (30); 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 arranged between the two clamping members (30), and the two ends of the inner tube (80) are respectively fixedly connected to the ends of the pressing 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); a 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; a 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; 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.

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

3. The cable connector according to claim 1, characterized in that: The number of the pressure arms (32) formed on the same ring body (31) is an even number and is more than four; correspondingly, a plurality of arm plates (81) extending in the axial direction are respectively formed on the end surfaces of 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 pressing arms (32) in the group, and clamping protrusions (811) are respectively formed on the end surfaces of the arm plate (81) facing the two pressing arms (32); the clamping protrusions (811) on the arm plate (81) can be inserted into the clamping grooves (323), so that the inner tube (80) and the pressing arm (32) are fixedly connected together.

4. The cable connector according to claim 1, characterized in that: It also includes two end caps (60) respectively matched with 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 3 (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 (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: 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) respectively; 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.

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