Coaxial cable splicing device and method of use

Abstract

This invention provides a coaxial cable splicing device and its usage method, belonging to the field of cable splicing technology. It includes two sets of traction units, a plug-in unit, and two protective covers. The two sets of traction units are symmetrically arranged at both ends of a concentric cable drum and are used to pull two sections of coaxial cable into the drum. Each traction unit includes a load-bearing hollow shaft and a cross-shaped driven rack. A guide gear, meshing with the cross-shaped driven rack, is rotatably mounted on the load-bearing hollow shaft. A backstop device is also provided on the load-bearing hollow shaft to control the opposite rotation of the guide gear. This invention transforms the traditional blind-insertion axial insertion method into a lateral, oblique, step-by-step guided assembly method, achieving rigid locking after insertion. This prevents connection loosening due to vibration or external force, avoids the thread wear and loosening problems that may occur with traditional threaded tightening connections due to repeated operation, and also overcomes the defect of reduced locking force due to elastic decay of elastic clips after long-term use.

Description

Technical Field

[0001] This invention relates to the field of cable splicing technology, and in particular to a coaxial cable splicing device and its usage method. Background Technology

[0002] Coaxial cables are widely used in fields such as radio frequency signal transmission, vehicle communication, and base station antenna feeder systems. In engineering practice, it is often necessary to splice the core wires and outer conductors of two coaxial cables to achieve continuous signal transmission.

[0003] Under current conditions, a coaxial cable splicing device, such as the one disclosed in CN118539204A, is commonly used. This device includes a cable drum and a tubular insulating component, with a conductive spacer positioned between the first and second connecting components. This solution achieves axial connection of the coaxial cable cores through the cooperation of the cable drum and the insulating component. However, in practical applications, the following shortcomings still exist: The operation is not convenient enough, and the alignment accuracy is difficult to guarantee. Existing methods often use a simple axial insertion joint between the cable reel and the insulating component. This requires inserting the two cable ends to be joined axially from both ends of the insulating component and blindly aligning the core wires and terminals in an unseen internal space. The lack of an effective pre-positioning and guiding mechanism for the cable ends makes problems such as core wire misalignment and terminal misalignment easy to occur during insertion, affecting the success rate of one-time assembly. This is particularly inconvenient in confined operating spaces or on-site emergency repair scenarios.

[0004] The connection locking reliability is insufficient, and there is a lack of axial anti-retraction structure. The axial positioning of the existing reel in the insulation cavity mainly relies on friction fit or simple elastic buckle. When subjected to the axial tension of the cable or long-term vibration conditions, a slight axial displacement may occur between the terminal and the core wire, resulting in increased contact resistance or even signal interruption. The system reliability is difficult to meet the long-term use requirements in harsh environments. Summary of the Invention

[0005] To overcome the above shortcomings, the present invention provides a coaxial cable splicing device and a method of use, which aims to improve the problem of difficulty in preventing coaxial cables from detaching.

[0006] This invention is implemented as follows: This invention provides a coaxial cable splicing device, comprising a concentric spool and two sections of coaxial cable, and further comprising: Two sets of traction units are symmetrically arranged at both ends of the concentric spool and are used to pull two sections of coaxial cable into the concentric spool. Each traction unit includes a load-bearing hollow shaft and a cross-shaped driven rack. A guide gear that meshes with the cross-shaped driven rack is rotatably mounted on the load-bearing hollow shaft, and a backstop is provided on the load-bearing hollow shaft to control the rotation of the guide gear in opposite directions. An L-shaped bracket is integrally connected to the cross-shaped driven rack, and an elastic limiter is provided on the L-shaped bracket. A locking device that cooperates with the elastic limiter to position the coaxial cable is provided inside the concentric spool. The two sections of coaxial cable move in the same direction through the cross-shaped driven rack and the elastic limiter until they make conductive contact. The plug-in part includes an i-shaped bracket disposed on two sets of elastic limiters. The two sets of i-shaped brackets are respectively provided with a snap-fit ​​end and a snap-fit ​​end seat for fixing the coaxial cable. The i-shaped bracket connected to the snap-fit ​​end is provided with a snap-fit ​​device for locking with the snap-fit ​​end seat, which is used to form a mechanical lock with the snap-fit ​​end seat. Two protective covers are symmetrically arranged at both ends of the concentric spool, and the concentric spool is closed when the two protective covers come into contact.

[0007] Preferably, the concentric spool body is a transverse reducer, and two sets of mounting grooves for obliquely embedding coaxial cables are provided at the upper end of the transverse reducer.

[0008] Preferably, the wiring groove is composed of a straight cut, a spherical cut, and a figure-eight cut connected in sequence, and the straight cut, the spherical cut, and the figure-eight cut extend from the end of the transverse reducer to the middle position.

[0009] Preferably, the anti-reverse device includes a concentric disk integrally connected to the middle position of the load-bearing hollow shaft, and a cross-shaped cavity is formed in the load-bearing hollow shaft and the concentric disk. A drive shaft is rotatably installed in the cross-shaped cavity, and a rhomboid turntable is fixedly installed on the drive shaft. A limiting pin is rotatably installed on the concentric disk, which is elastically supported by a reset torsion spring and eccentrically pulled by the rhomboid turntable. The inner ring of the guide gear is integrally connected to a ratchet tooth set corresponding to the limiting pin.

[0010] Preferably, the elastic limiter includes a hemispherical protrusion, the lower end of which is welded with an extension column that movably passes through the L-shaped bracket, the lower end of which is integrally connected with a threaded rod, and an elastic movable disk that is movably fitted onto the extension column and abuts against the L-shaped bracket is fixedly connected to the hemispherical protrusion.

[0011] Preferably, the locking device includes a damping square post slidably installed at the lower end of the transverse reducer, an elastic slider is provided in the damping square post, a damping bearing is fixedly provided in the elastic slider, and a threaded tube with a corresponding threaded rod is fitted in the damping bearing.

[0012] Preferably, the snap-fit ​​end has a snap-fit ​​port.

[0013] Preferably, the snap-fit ​​device includes a zigzag-shaped snap pin that is rotatably mounted on the U-shaped bracket and corresponds to the snap-fit ​​opening.

[0014] Preferably, the insertion part further includes a driver disposed at the lower end of the transverse reducer, the driver including a pressure rod for moving and abutting one end of the zigzag-shaped locking pin.

[0015] The above-mentioned method of using a coaxial cable splicing device includes the following steps: Step S1: Pre-fix the two ends of the coaxial cable to be spliced ​​to the snap-fit ​​end and snap-fit ​​seat of the plug-in part, respectively. Then, install the snap-fit ​​end and snap-fit ​​seat into the C-shaped brackets of the two traction parts, and put the whole cable into the cable loading groove of the concentric cable spool. Under the action of the elastic moving plate, the hemispherical protrusion of the elastic limiter is snapped into the spherical cut at the outermost end of the cable loading groove to achieve initial positioning. Step S2: Alternately or simultaneously rotate the drive shafts on both load-bearing hollow shafts. The drive shafts drive the eccentric traction limit pin of the diamond-shaped turntable, causing it to overcome the elastic force of the reset torsion spring and disengage from the ratchet gear group of the inner ring of the guide gear, thereby releasing the lock. Continuously rotating the guide gear will allow it to rotate. The guide gear drives the cross-shaped driven rack, which in turn drives the L-shaped bracket and the fixed coaxial cable to move smoothly towards the center of the concentric spool through the L-shaped bracket and the elastic limiter. During the movement, the hemispherical protrusion slides past the spherical cut on the wire mounting groove one by one. The anti-reverse device automatically locks during the rotation pause to prevent the cross-shaped driven rack from retracting. Step S3: Continue to drive the traction unit so that the snap-fit ​​end on one side is gradually inserted into the snap-fit ​​end seat on the other side. Use the snap-fit ​​end seat to apply pressure to the elastic telescopic block. At the same time, the zigzag snap pin deflects until the upper end of the zigzag snap pin is engaged in the snap-fit ​​opening reserved on the snap-fit ​​end to achieve mechanical locking and complete the connection of the inner and outer conductors. Step S4: Rotate the threaded tube in the locking device. Under the floating support of the damping bearing and the elastic slider, the threaded tube gradually engages with the threaded rod at the lower end of the elastic limiter. As it tightens, the threaded tube pulls the threaded rod, forcing the elastic limiter to move down as a whole. The hemispherical protrusion at the top of the limiter is pressed tightly into the current figure-eight cut position. The elastic moving disc compresses and stores energy, and the entire traction part is rigidly locked in the current position. Step S5: Twist and push the two protective covers, which are symmetrically placed at both ends of the concentric spool, toward the center along the axial direction until the end faces of the two protective covers touch each other, completely enclosing the concentric spool and all splicing structures inside.

[0016] The beneficial effects of this invention are: 1. This invention transforms the traditional blind-insertion axial insertion method into a guided assembly method of lateral oblique insertion and step-by-step introduction. The cable tray consists of sequentially connected straight cuts, spherical cuts, and figure-eight cuts: the straight cuts provide a wide receiving section for easy initial insertion of the cable end; the spherical cuts provide staged positioning recesses, which, in conjunction with the hemispherical protrusion of the elastic limiter, serve as the final locking section; the wedge-shaped bevel provides a self-centering function during locking, precisely constraining the hemispherical protrusion of the elastic limiter to the final docking position.

[0017] 2. This invention transforms the axial advancement of the cable into angular displacement input via a rotary handle. It utilizes the gear and rack transmission ratio to achieve precise control of the feed speed. An anti-reverse device, consisting of a diamond-shaped turntable, traction rod, limit pin, and ratchet gear assembly, is integrated inside the guide gear. During rotational pauses, the limit pin automatically engages with the ratchet gear assembly, forming a reliable mechanical anti-reverse mechanism. The anti-reverse device and ratchet gear assembly constitute a one-way locking mechanism, allowing the cable to advance freely in the docking direction but strictly prohibiting reverse retreat. The locking device, through a threaded tube engaging a threaded rod, presses the hemispherical protrusion of the elastic limiter into the figure-eight cut, achieving rigid locking after advancement. This dual locking mechanism ensures that the axial relative position of the two cable segments is permanently fixed after splicing.

[0018] 3. In this invention, the insertion part adopts a lever-type mechanical locking rather than an elastic snap or threaded connection. When the cables on both sides are inserted towards the center, the snap-fit ​​end seat presses against the elastic telescopic block and pushes the zigzag-shaped snap pin to deflect around the fulcrum. When the snap-fit ​​end and the snap-fit ​​end seat are fully inserted, the upper end of the zigzag-shaped snap pin automatically swings into the snap-fit ​​opening, forming a rigid mechanical lock. This prevents the connection from loosening due to vibration or external force, avoids the problem of thread wear and loosening that may occur with traditional threaded tightening connections due to repeated operation, and also overcomes the defect of reduced locking force caused by the elastic decay of elastic snaps after long-term use. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a coaxial cable splicing device provided in an embodiment of the present invention; Figure 2 This is a front sectional view of a coaxial cable splicing device provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of a transverse reducer structure for a coaxial cable splicing device provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the traction section structure of a coaxial cable splicing device provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of a locking device structure for a coaxial cable splicing device provided in an embodiment of the present invention; Figure 6 This is a bottom view of the elastic limiter structure of a coaxial cable splicing device provided in an embodiment of the present invention; Figure 7 This is an enlarged schematic diagram of part A of a coaxial cable splicing device provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the C-shaped bracket and snap-fit ​​end of a coaxial cable splicing device provided in an embodiment of the present invention; Figure 9 This is a schematic diagram of the plug-in structure of a coaxial cable splicing device provided in an embodiment of the present invention; Figure 10 This is a cross-sectional view of the connector structure of a coaxial cable splicing device provided in an embodiment of the present invention.

[0021] In the picture: 1. Concentric spool; 11. Transverse reducer; 12. Cable tray; 121. Straight cut; 122. Spherical cut; 123. Herringbone cut; 13. Guide thread; 2. Traction unit; 21. Load-bearing hollow shaft; 22. Guide gear; 23. Anti-reverse device; 231. Concentric disc; 232. Cross-shaped cavity; 233. Electric push rod; 234. Micro motor; 235. Drive shaft; 236. Diamond-shaped turntable; 237. Traction link; 238. Limit pin; 239. Ratchet gear set; 24. Cross-shaped driven rack; 25. L-shaped bracket; 26. Elastic limiter; 261. Hemispherical protrusion; 262. Extension column; 263. Threaded rod; 264. Elastic moving disc; 27. Locking device; 271. Damping square column; 272. Elastic slider; 273. Damping bearing; 274. Threaded tube; 3. Insertion part; 31. C-shaped bracket; 32. Snap-fit ​​end; 33. Snap-fit ​​end seat; 34. Snap-fit ​​device; 341. Cross-shaped elastic abutment; 342. Folded-line type snap pin; 343. Limiting guide groove; 344. Elastic telescopic block; 35. Snap-fit ​​port; 36. Driver; 361. T-shaped vertical shaft; 362. Pneumatic piston block; 363. Traction rod; 364. Pressure booster rod; 4. Protective cover. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Reference Figures 1-10 A coaxial cable splicing device includes a concentric spool 1 and two sections of coaxial cable, as well as two sets of traction parts 2, a plug-in part 3, and two protective covers 4. In some embodiments, the main body of the concentric spool 1 is a transverse reducer 11, which adopts a stepped diameter reduction structure, with the diameter in the middle of the tube being larger than the diameter at both ends, so as to form an assembly space inside to accommodate the traction part 2 and the insertion part 3. Two sets of cable mounting grooves 12 for obliquely embedding coaxial cables are provided at the upper end of the transverse reducer 11. The two cable mounting grooves 12 are symmetrically arranged along the axial mid-section of the transverse reducer 11. Guide threads 13 are provided at both ends of the transverse reducer 11 for threaded connection with the protective cover 4.

[0024] Reference Figure 3 The wiring groove 12 is composed of a straight cut 121, a spherical cut 122, and a figure-eight cut 123 connected in sequence, and the straight cut 121, the spherical cut 122, and the figure-eight cut 123 extend from the end of the transverse reducer 11 towards the middle position. It should be noted that: First, the innovation of the three-section cut structure lies in transforming the traditional axial blind insertion assembly method into a lateral step-by-step guided assembly method: the straight cut 121 is located at the outermost end of the cable tray 12, and its cut width is greater than the outer diameter of the coaxial cable to be received, forming a wide-mouth receiving section, which makes it easy for the operator to put the cable into the tray from the side at an angle without strict axial alignment, greatly reducing the difficulty of initial assembly. Secondly, the number of spherical cuts 122 is preferably multiple, and they are arranged at intervals along the extension direction of the cable mounting groove 12. The inner diameter of each spherical cut 122 matches the outer diameter of the hemispherical protrusion 261 of the elastic limiter 26, forming a staged positioning recess. When the hemispherical protrusion 261 slides into a certain spherical cut 122, the elastic restoring force of the elastic moving disk 264 pushes the hemispherical protrusion 261 to embed in it, and emits perceptible tactile and auditory feedback, so that the operator can judge the cable feeding process. Finally, the figure-eight cut 123 is located at the innermost end of the wiring groove 12. Its cross-sectional profile is wedge-shaped. The two inclined surfaces provide radial self-centering function under the action of locking force, guiding the hemispherical protrusion 261 along the inclined surface to the tip of the cut, accurately constraining the final docking position and eliminating assembly gaps.

[0025] In some embodiments, two sets of traction units 2 are symmetrically arranged at both ends of the concentric drum 1 and are used to pull two sections of coaxial cable into the concentric drum 1. The traction unit 2 includes a load-bearing hollow shaft 21 fixedly arranged in the concentric drum 1, whose axis coincides with or is parallel to the central axis of the transverse reducer 11, providing a rigid support reference for the entire traction unit 2.

[0026] A guide gear 22 is rotatably mounted on a load-bearing hollow shaft 21, and a backstop 23 is provided on the load-bearing hollow shaft 21 to control the rotation of the guide gear 22 in opposite directions. A cross-shaped driven rack 24, which meshes with the guide gear 22, is slidably mounted inside the concentric spool 1. The cross-shaped driven rack 24 is slidably mounted in a pre-set guide rail groove inside the concentric spool 1, and its tooth surface meshes with the tooth surface of the guide gear 22, forming a gear and rack transmission pair. The cross-shaped driven rack 24 has a cross-shaped cross section, and the guide rail groove that it meshes with is also a cross-shaped groove. This structural design allows the cross-shaped driven rack 24 to effectively resist the overturning tendency caused by the eccentric torque when it is subjected to the tangential driving force transmitted by the gear, maintaining the straightness and stability of the axial movement, and avoiding tooth surface wear and transmission efficiency reduction caused by rack tilting. An L-shaped bracket 25 is integrally connected to the cross-shaped driven rack 24, the vertical section of which extends to the bottom of the cable tray 12, providing a mounting base for the elastic limiter 26. The elastic limiter 26 is installed on the L-shaped bracket 25, and a locking device 27 is installed inside the concentric cable spool 1 to position the coaxial cable in conjunction with the elastic limiter 26. The two sections of the coaxial cable move in the same direction as the elastic limiter 26 through the cross-shaped driven rack 24 until they make conductive contact.

[0027] Reference Figure 7 The anti-reverse device 23 includes a concentric disk 231 integrally connected to the middle position of the load-bearing hollow shaft 21. A cross-shaped cavity 232 is opened in the load-bearing hollow shaft 21 and the concentric disk 231. The cross-shaped cavity 232 provides rotational support space for the drive shaft 235. An electric push rod 233 is fixedly installed in the load-bearing hollow shaft 21. A micro motor 234 is fixedly connected to the output end of the electric push rod 233. The drive shaft 235 is rotatably installed in the cross-shaped cavity 232. Both the output end of the micro motor 234 and the end of the drive shaft 235 are provided with snap-fit ​​connection ends. The snap-fit ​​connection is an end face toothed or plum blossom-shaped elastic coupling structure, which realizes engagement and disengagement under the axial extension and retraction drive of the electric push rod 233. A rhomboid turntable 236 is fixedly mounted on the drive shaft 235. A limiting pin 238, which is elastically supported by a reset torsion spring and eccentrically pulled by the rhomboid turntable 236, is rotatably mounted on the concentric disc 231. That is, a traction link 237, which is eccentrically set and rotatably connected to the limiting pin 238, is pinned on the rhomboid turntable 236. A pin is eccentrically set on the end face of the rhomboid turntable 236. One end of the traction link 237 is rotatably connected to the pin, and the other end is rotatably connected to the middle of the limiting pin 238, thus forming a crank-rocker mechanism.

[0028] When the rhomboid turntable 236 rotates, the eccentric traction limiting pin 238 of the traction link 237 swings around its fulcrum, overcoming the force of the reset torsion spring and causing the limiting pin 238 to disengage from the ratchet gear set 239, thus releasing the one-way locking state. The inner ring of the guide gear 22 is integrally connected with a ratchet gear set 239 corresponding to the limiting pin 238. In the free state, the limiting pin 238 is pushed by the elastic force into a certain tooth groove of the ratchet gear set 239 integrally connected to the inner ring of the guide gear 22.

[0029] It should be noted that: The ratchet gear 239 has an asymmetrical sawtooth shape, and its stop surface has a forward tilt angle of 5°-15° with the radial direction of the guide gear 22. This causes the limit pin 238 and the ratchet gear 239 to generate a self-locking effect under the action of the reverse torque. When the guide gear 22 rotates in the feed direction, the back of the teeth pushes the limit pin 238 to overcome the return torsion spring and allow rotation. When rotating in the reverse direction, the ratchet tooth surface and the end face of the limit pin 238 form a wedging self-lock, which strictly prohibits rotation.

[0030] In some implementation methods: In manual mode, the electric push rod 233 is in the retracted state, the micro motor 234 is separated from the drive shaft 235, and the operator can directly rotate the exposed operating end of the drive shaft 235 to first release the anti-reverse check through the diamond-shaped turntable 236 and the traction link 237, and then continue to rotate to drive the guide gear 22 to rotate. In electric mode, the electric push rod 233 extends to engage the micro motor 234 with the drive shaft 235. The micro motor 234 directly drives the drive shaft 235 to rotate, thereby achieving automatic feeding or reverse withdrawal.

[0031] This design can still be used normally in the absence of power on site, and can improve operating efficiency when power is available.

[0032] Reference Figure 4The elastic limiter 26 includes a hemispherical protrusion 261. An extension post 262 that movably passes through the L-shaped bracket 25 is welded to the lower end of the hemispherical protrusion 261. A threaded rod 263 is integrally connected to the lower end of the extension post 262. An elastic movable disk 264 that is movably fitted onto the extension post 262 and abuts against the L-shaped bracket 25 is fixedly connected to the hemispherical protrusion 261. The elastic movable disk 264 is fixedly connected to the lower end face of the hemispherical protrusion 261 and movably fitted onto the extension post 262. Its lower surface abuts against the upper surface of the L-shaped bracket 25. The extension post 262 movably passes through the horizontal section of the L-shaped bracket 25. The elastic moving disc 264 is stamped from a sheet of metal spring steel and has the mechanical characteristics of a disc spring. Its load-deformation curve exhibits nonlinear characteristics, and it can provide sufficient preload under a small amount of compression, so that the hemispherical protrusion 261 produces a clear locking action when it slides into the spherical cut 122. When the locking device 27 applies a downward pulling force, the elastic moving disc 264 further compresses and stores energy, rigidly pressing the hemispherical protrusion 261 into the figure-eight cut 123.

[0033] Furthermore, the spherical radius of the hemispherical protrusion 261 and the inner diameter of the spherical cut 122 are in transition fit or micro-clear gap fit. When the hemispherical protrusion 261 is in a certain spherical cut 122, the hemispherical surface and the inner wall of the spherical shape form a spherical-socket self-centering contact, and both the axial and radial directions are constrained, so the cable position is locked in stages during the feeding process.

[0034] Reference Figure 5 The locking device 27 includes a damping square post 271 slidably installed at the lower end of the transverse reducer 11. The damping square post 271 is slidably installed in a pre-set square channel at the lower end of the transverse reducer 11 and can be adjusted axially to adapt to different locking points.

[0035] An elastic slider 272 is provided in the damping column 271. The elastic slider 272 can float up and down. A damping bearing 273 is fixedly provided inside the elastic slider 272. The damping bearing 273 has a preset rotational damping torque. This damping torque is greater than the rotational torque generated by the thread helix angle when the threaded tube 274 is screwed into the threaded rod 263, ensuring that the threaded tube 274 will not rotate and loosen on its own when it is not subjected to external force. The damping bearing 273 is fitted with a threaded tube 274 corresponding to the threaded rod 263. The reaction force of the threaded tube 274 moving upward along the threaded rod 263 is transmitted to the damping square column 271 through the damping bearing 273 and the elastic slider 272, and then acts on the bottom surface of the square channel of the transverse reducer 11. This forms a rigid locking mechanical system with the axial tensile force generated by the threaded pair, the radial component locking force generated after the hemispherical protrusion 261 is pressed into the figure-eight cut 123, and the elastic restoring force of the elastic moving disk 264 working together. This eliminates all connection gaps and makes the traction part 2 and the coaxial cable that has been docked completely constrained in the axial, radial and circumferential directions.

[0036] In some embodiments, the plug part 3 includes an inverted bracket 31 disposed on two sets of elastic limiters 26. The two sets of inverted brackets 31 are respectively provided with a snap-fit ​​end 32 and a snap-fit ​​end seat 33 for fixing the coaxial cable. The internal structure of the snap-fit ​​end 32 and the snap-fit ​​end seat 33 follows the standard design of coaxial connectors, and is respectively provided with a center pin (or socket) for welding or crimping the inner conductor of the core wire and an annular contact for connecting the outer conductor to ensure characteristic impedance matching after docking.

[0037] A set of U-shaped brackets 31 connecting the snap-fit ​​end 32 are provided with snap-fit ​​devices 33 for locking with the snap-fit ​​end seat 33, forming a mechanical lock. The snap-fit ​​end 32 has a snap-fit ​​opening 35, which is a radial through-hole structure or a blind hole structure with a certain depth. A driver 36 for driving the snap-fit ​​device 34 to deflect is provided at the lower end of the transverse reducer 11.

[0038] Reference Figure 10The snap-fit ​​connector 34 includes a cross-shaped elastic abutment 341 welded to the snap-fit ​​end seat 33, the free end of which is a cross-shaped or spherical enlarged end. A zigzag-shaped snap pin 342, with its upper end corresponding to the snap-fit ​​opening 35, is rotatably mounted on the U-shaped bracket 31. The pin is zigzag-shaped or L-shaped. A limiting guide groove 343 for movable fitting of the cross-shaped elastic abutment 341 is opened on the inner side of the lower end of the zigzag-shaped snap pin 342. The limiting guide groove 343 is an elongated oval groove, the length direction of which is consistent with the extension direction of the zigzag-shaped snap pin 342, providing a guiding stroke for the relative sliding of the cross-shaped elastic abutment 341 during the deflection of the zigzag-shaped snap pin 342. An elastic telescopic block 344 corresponding to the snap-fit ​​end seat 33 is provided in the snap-fit ​​end head 32. The compression of the elastic telescopic block 344 provides elastic buffering for insertion into place, and its axial reaction force ensures that the contact surfaces of the snap-fit ​​end head 32 and the snap-fit ​​end seat 33 are tightly fitted.

[0039] The force analysis of the insertion part 3 is as follows: If an axial tensile force is applied to the snap-fit ​​end 32 to attempt to disengage it from the snap-fit ​​end seat 33, the inner wall of the snap-fit ​​opening 35 will apply a torque opposite to the deflection direction to the upper end of the zigzag-shaped snap pin 342. This torque attempts to deflect the zigzag-shaped snap pin 342 in the opposite direction. However, the lower end of the zigzag-shaped snap pin 342 is constrained by the cross elastic abutment 341 at the dead point position of the limiting guide groove 343 and cannot continue to deflect, thus forming a rigid mechanical lock.

[0040] Furthermore, the actuator 36 includes a three-way vertical shaft 361 fixedly mounted at the lower end of the transverse reducer 11, used to drive the zigzag-shaped locking pin 342 to unlock during disassembly. A pneumatic piston block 362 is movably fitted inside the three-way vertical shaft 361. The three-way vertical shaft 361 has an internal piston chamber, within which the pneumatic piston block 362 is movably fitted. It can be driven by external air pressure applied through the interface of the three-way vertical shaft 361. A pressure boosting rod 364, which is movably pulled by the pneumatic piston block 362 and used to actuate one end of the zigzag-shaped locking pin 342, is pinned to the three-way vertical shaft 361. A traction rod 363 is pinned between the pneumatic piston block 362 and the pressure boosting rod 364. The pneumatic drive unlocking method of the pneumatic piston block 362 utilizes Pascal's principle to amplify the input air pressure, generating sufficient unlocking torque with a relatively small input air pressure. Furthermore, the pneumatic pipeline can be operated remotely, facilitating remote unlocking control even in confined spaces integrated with the equipment.

[0041] In some embodiments, two protective covers 4 are symmetrically arranged at both ends of the concentric spool 1, and the two protective covers 4 seal the concentric spool 1 when they come into contact by the guide threads 13. The protective cover 4 has a cylindrical structure, and its inner wall has an internal thread section that mates with the guide threads 13. It is pushed axially toward the center of the concentric spool 1 by screwing. The threaded mating surfaces between the protective cover 4 and the transverse reducer 11, as well as the end face mating surfaces between the two protective covers 4, are provided with elastic sealing rings to achieve environmental sealing protection and prevent moisture, dust, and corrosive media from entering the internal connection area.

[0042] It should be noted that the specific model specifications of the electric actuator 233 and the micro motor 234 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0043] The principle is explained through the following operations: First, the two coaxial cable ends to be spliced ​​are pre-fixed to the snap-fit ​​end 32 and snap-fit ​​end seat 33 of the plug-in part 3, respectively. Specifically, the inner and outer conductors of the two coaxial cable ends to be spliced ​​are stripped and fixedly fitted onto the snap-fit ​​end 32 and snap-fit ​​end seat 33. The snap-fit ​​end 32 is inserted into the C-shaped bracket 31 of one side of the traction part 2, and the snap-fit ​​end seat 33 is inserted into the symmetrical C-shaped bracket 31 on the other side. The cable is held with both hands and inserted obliquely into the cable loading groove 12 of the concentric cable spool 1. The cable loading groove 12 is composed of a straight cut 121, a spherical cut 122 and a figure-eight cut 123 connected from the outside to the inside. During insertion, the hemispherical protrusion 261 of the elastic limiter 26 is pushed by the elastic force of the elastic moving disk 264, slides from the straight cut 121 and snaps into the outermost spherical cut 122. At this point, the extension column 262 passes through the L-shaped bracket 25, and the L-shaped bracket 25 is integrally connected with the cross-shaped driven rack 24, so that the whole mechanism obtains a clear initial positioning.

[0044] Secondly, the drive shafts 235 on the hollow shafts 21 on both sides are rotated alternately or simultaneously. The drive shafts 235 drive the diamond-shaped turntable 236, which eccentrically pulls the limiting pin 238, causing it to overcome the return torsion spring and disengage from the ratchet gear group 239 of the inner ring of the guide gear 22, thus releasing the lock; continuous rotation will cause the guide gear 22 to rotate. The guide gear 22 drives the cross-shaped driven rack 24, which in turn drives the C-shaped bracket 31 and the fixed coaxial cable to move smoothly towards the center of the concentric spool 1 through the L-shaped bracket 25 and the elastic limiter 26. During the movement, the hemispherical protrusion 261 slides past the spherical cut 122 on the wire mounting groove 12 one by one. The anti-reverse device 23 automatically locks during the rotation pause to prevent the cross-shaped driven rack 24 from retracting. Specifically, it is confirmed that the electric push rod 233 is in the retracted state and the snap connection between the micro motor 234 and the end of the drive shaft 235 is in the disengaged state. At this time, the drive shaft 235 can be rotated manually (or with the help of a tool). The rotating drive shaft 235 drives the diamond-shaped turntable 236 fixed on it to rotate. The diamond-shaped turntable 236 is connected to the traction rod 237 via an eccentric pin, which forcibly pulls the limit pin 238 to overcome the return torsion spring force, causing the limit pin 238 to disengage from the ratchet gear set 239 on the inner ring of the guide gear 22, thus releasing the one-way lock. The rotating drive shaft 235 continues to rotate, and the guide gear 22 rotates accordingly. Since the guide gear 22 is mounted on the load-bearing hollow shaft 21, and the load-bearing hollow shaft 21 is fixed inside the concentric spool 1, the rotational motion is transmitted stably. The guide gear 22 drives the cross-shaped driven rack 24, which meshes with it, to move smoothly along the axial direction, and then drives the C-shaped bracket 31 and the fixed cable to feed towards the center of the concentric spool 1 through the L-shaped bracket 25 and the elastic limiter 26.

[0045] During the movement, the hemispherical protrusion 261 is pressed into and slides out of the spherical cutout 122 along the way, providing phased positioning feedback. When the rotation pauses, the reset torsion spring and the limit pin 238 re-engage with the ratchet gear set 239, and the anti-reverse device 23 automatically locks to prevent the cross-shaped driven rack 24 from retracting.

[0046] Next, the traction unit 2 is driven further, causing the snap-fit ​​end 32 on one side to gradually insert into the snap-fit ​​end seat 33 on the opposite side. The snap-fit ​​end seat 33 applies pressure to the elastic telescopic block 344, while simultaneously pushing the zigzag-shaped snap pin 342 to deflect until the upper end of the zigzag-shaped snap pin 342 engages in the snap-fit ​​opening 35 reserved on the snap-fit ​​end 32, achieving mechanical locking and completing the connection of the inner and outer conductors. Specifically, the traction unit 2 is driven so that the side with the snap-fit ​​end 32 is inserted into the side with the snap-fit ​​end seat 33. During insertion, the front end face of the snap-fit ​​end seat 33 compresses the elastic telescopic block 344, while the outer wall of the snap-fit ​​end seat 33 pushes the lower part of the zigzag-shaped snap pin 342. The zigzag-shaped locking pin 342 deflects around its rotation point with the U-shaped bracket 31. The limiting guide groove 343 on the inner side of its lower end slides along the cross elastic abutment 341 welded to the U-shaped bracket 31. The cross elastic abutment 341 provides elastic guidance and a return tendency. When the locking end 32 and the locking end seat 33 are fully inserted and the inner and outer conductors are connected, the upper end of the zigzag-shaped locking pin 342 is precisely positioned and locked into the locking opening 35 reserved on the locking end 32, forming a rigid mechanical lock and completing the firm docking of the insertion part 3.

[0047] Then, the threaded tube 274, supported by the floating damping bearing 273 and the elastic slider 272, maintains a relatively fixed axial position. Rotating the threaded tube 274 gradually engages with the threaded rod 263 at the lower end of the elastic limiter 26. As it tightens, the threaded rod 263 is pulled towards the threaded tube 274, forcing the elastic limiter 26 to move downwards as a whole. Its top hemispherical protrusion 261 is tightly pressed into the current position of the figure-eight cutout 123. The elastic moving disc 264 compresses and stores energy, and the entire traction unit 2 is rigidly locked in its current position. Specifically, the damping square column 271, which is slidably mounted at the lower end of the transverse reducer 11, is located, housing the elastic slider 272 and the damping bearing 273. The threaded tube 274 is fitted inside the damping bearing 273. Rotating the threaded tube 274 gradually engages with the threaded rod 263 at the lower end of the elastic limiter 26. Because the damping bearing 273 provides rotational damping and the elastic slider 272 provides floating margin, adaptive centering is possible. During tightening, the threaded tube 274 pulls the threaded rod 263, which in turn pulls the hemispherical protrusion 261 downwards through the extension column 262, forcibly pressing it from the spherical cutout 122 into the figure-eight cutout 123 at the end. At this time, the elastic moving disk 264 is compressed and stored in energy, and the entire elastic limiter 26, L-shaped bracket 25, cross-shaped driven rack 24, and mated coaxial cable are rigidly locked in the current position, eliminating all mating gaps.

[0048] Finally, the two protective covers 4, symmetrically positioned at both ends of the concentric spool 1, are screwed and pushed axially toward the center until the end faces of the two protective covers 4 abut against each other, completely enclosing the internal concentric spool 1 and all splicing structures. Specifically, the two symmetrically positioned protective covers 4 are pushed from both ends of the concentric spool 1 toward the center, so that their internal threads or guide structures engage with the guide threads 13 at both ends of the transverse reducer 11 for screwing or sliding. This continues until the end faces of the two protective covers 4 abut against each other, completely enclosing the internal concentric spool 1, traction part 2, and insertion part 3. At this point, the splicing is complete, and the interior is provided with insulation, mechanical, and environmental protection.

[0049] To further explain, in the initial state, the micro motor 234 is disconnected from the drive shaft 235, allowing only unidirectional feeding. When disassembling the connection between the inner and outer conductors, the driver 36 located at the lower end of the concentric spool 1 is operated first to drive its booster rod 364 to move and abut one end of the zigzag-shaped locking pin 342, causing the zigzag-shaped locking pin 342 to rotate. Its other end is pulled out from the locking port 35 reserved on the locking end 32. Then, the electric push rod 233 is used to control the connection end on the micro motor 234 to assemble and connect with the drive shaft 235, controlling the diamond-shaped turntable 236 to deflect in the opposite direction. That is, the limit pin 238 stops the unidirectional locking limit on the ratchet tooth group 239, thereby controlling the two sets of traction parts 2 to move in opposite directions.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A coaxial cable splicing device, comprising a concentric spool (1) and two sections of coaxial cable, characterized in that, Also includes: Two sets of traction units (2) are symmetrically arranged at both ends of the concentric spool (1) and are used to pull two coaxial cables into the concentric spool (1). The traction unit (2) includes a load-bearing hollow shaft (21) and a cross-shaped driven rack (24). A guide gear (22) that meshes with the cross-shaped driven rack (24) is rotatably mounted on the load-bearing hollow shaft (21). A backstop (23) that controls the rotation of the guide gear (22) in opposite directions is provided on the load-bearing hollow shaft (21). An L-shaped bracket (25) is integrally connected to the cross-shaped driven rack (24). An elastic limiter (26) is provided on the L-shaped bracket (25). A locking device (27) that cooperates with the elastic limiter (26) to position the coaxial cable is provided in the concentric spool (1). The two coaxial cables move in the same direction through the cross-shaped driven rack (24) and the elastic limiter (26) until they make conductive contact. The plug-in part (3) includes an incline bracket (31) disposed on two sets of elastic limiters (26). The two sets of incline brackets (31) are respectively provided with a snap-fit ​​end (32) and a snap-fit ​​end seat (33) for fixing the coaxial cable. A snap-fit ​​device (34) for locking with the snap-fit ​​end seat (33) is provided on one set of incline brackets (31) that connects to the snap-fit ​​end (32), for forming a mechanical lock with the snap-fit ​​end seat (33). Two protective covers (4) are symmetrically arranged on both ends of the concentric spool (1), and the concentric spool (1) is closed when the two protective covers (4) touch.

2. The coaxial cable splicing device according to claim 1, characterized in that, The main body of the concentric tube (1) is a transverse reducer (11), and two sets of mounting grooves (12) for obliquely embedding coaxial cables are provided at the upper end of the transverse reducer (11).

3. The coaxial cable splicing device according to claim 2, characterized in that, The wiring groove (12) is composed of a straight cut (121), a spherical cut (122) and a figure-eight cut (123) connected in sequence, and the straight cut (121), the spherical cut (122) and the figure-eight cut (123) extend from the end of the transverse reducer (11) to the middle position.

4. The coaxial cable splicing device according to claim 3, characterized in that, The anti-reverse device (23) includes a concentric disk (231) integrally connected to the middle position of the load-bearing hollow shaft (21), and a cross-shaped cavity (232) is opened in the load-bearing hollow shaft (21) and the concentric disk (231). A drive shaft (235) is rotatably installed in the cross-shaped cavity (232). A rhomboid turntable (236) is fixedly installed on the drive shaft (235). A limiting pin (238) is rotatably installed on the concentric disk (231) and is elastically supported by a reset torsion spring and eccentrically pulled by the rhomboid turntable (236). A ratchet tooth set (239) corresponding to the limiting pin (238) is integrally connected to the inner ring of the guide gear (22).

5. A coaxial cable splicing device according to claim 4, characterized in that, The elastic limiter (26) includes a hemispherical protrusion (261), and an extension column (262) that movably passes through the L-shaped bracket (25) is welded to the lower end of the hemispherical protrusion (261). A threaded rod (263) is integrally connected to the lower end of the extension column (262). An elastic movable disk (264) that is movably fitted onto the extension column (262) and abuts against the L-shaped bracket (25) is fixedly connected to the hemispherical protrusion (261).

6. A coaxial cable splicing device according to claim 5, characterized in that, The locking device (27) includes a damping square post (271) that is slidably installed at the lower end of the transverse reducer (11). An elastic slider (272) is provided in the damping square post (271). A damping bearing (273) is fixedly provided in the elastic slider (272). A threaded tube (274) corresponding to the threaded rod (263) is fitted in the damping bearing (273).

7. A coaxial cable splicing device according to claim 6, characterized in that, The snap-fit ​​end (32) has a snap-fit ​​port (35).

8. A coaxial cable splicing device according to claim 7, characterized in that, The snap-fit ​​device (34) includes a zigzag-shaped snap pin (342) that is rotatably mounted on the U-shaped bracket (31) and corresponds to the snap-fit ​​opening (35).

9. A coaxial cable splicing device according to claim 8, characterized in that, The plug-in part (3) also includes a driver (36) located at the lower end of the transverse reducer (11), the driver (36) including a pressure rod (364) for moving against one end of the zigzag pin (342).

10. The method of using the coaxial cable splicing device as described in claim 9, characterized in that, The method of use includes the following steps: Step S1: The two ends of the coaxial cable to be spliced ​​are pre-fixed to the snap-fit ​​end (32) and snap-fit ​​end seat (33) of the plug part (3), respectively. Then the snap-fit ​​end (32) and snap-fit ​​end seat (33) are respectively installed into the U-shaped bracket (31) of the two traction parts (2), and the whole cable is placed along the cable loading groove (12) of the concentric cable spool (1). Under the action of the elastic moving disk (264), the hemispherical protrusion (261) of the elastic limiter (26) is inserted into the spherical cut (122) at the outermost end of the cable loading groove (12) to achieve initial positioning. Step S2, alternately or simultaneously rotate the drive shaft (235) on the two load-bearing hollow shafts (21), the drive shaft (235) drives the rhomboid turntable (236) to eccentrically pull the limit pin (238), so that it overcomes the elastic force of the reset torsion spring and disengages from the ratchet gear group (239) of the inner ring of the guide gear (22), thereby unlocking; continue to rotate the guide gear (22) to make it rotate, the guide gear (22) drives the cross-shaped driven rack (24), and then through the L-shaped bracket (25) and the elastic limiter (26), drives the shaped bracket (31) and the fixed coaxial cable to move smoothly towards the center of the concentric spool (1), during the movement, the hemispherical protrusion (261) slides through the spherical cut (122) on the wire mounting groove (12) one after another, the anti-reverse device (23) automatically locks during the rotation pause gap to prevent the cross-shaped driven rack (24) from retracting; Step S3, continue to drive the traction unit (2) so that the snap-fit ​​end (32) on one side is gradually inserted into the snap-fit ​​end seat (33) on the opposite side. Use the snap-fit ​​end seat (33) to apply pressure to the elastic telescopic block (344). At the same time, the zigzag-shaped snap pin (342) deflects until the upper end of the zigzag-shaped snap pin (342) is inserted into the snap-fit ​​opening (35) reserved on the snap-fit ​​end (32) to achieve mechanical locking and complete the connection of the inner and outer conductors. Step S4, rotate the threaded tube (274) in the locking device (27). Under the floating support of the damping bearing (273) and the elastic slider (272), the threaded tube (274) gradually engages with the threaded rod (263) at the lower end of the elastic limiter (26). As it tightens, the threaded tube (274) pulls the threaded rod (263), forcing the elastic limiter (26) to move down as a whole. The hemispherical protrusion (261) at the top of the limiter is pressed tightly into the current position of the figure-eight cut (123). The elastic moving disc (264) compresses and stores energy, and the entire traction part (2) is rigidly locked in the current position. Step S5: Twist and push the two protective covers (4) that are symmetrically placed at both ends of the concentric spool (1) toward the center along the axial direction until the end faces of the two protective covers (4) touch each other, completely covering the concentric spool (1) and all splicing structures inside.

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