Cable head self-locking anti-loosening connecting structure with elastic pre-tightening function

Abstract

The invention relates to the technical field of fasteners, in particular to an elastic pre-tightening cable head self-locking anti-loosening connecting structure which comprises a clamping pile female seat and a clamping pile male seat, and an adaptive tightening assembly used for clamping and fixing an object is arranged between the clamping pile male seat and the clamping pile female seat. The adaptive tightening assembly comprises two crescent locking plates and two empty notches, a furling pre-tightening assembly used for locking the two crescent locking plates is arranged outside the clamping pile female base, the abutting ring is driven by the bolt rod to spirally enter the abutting notches, a double-locking structure of mechanical pre-tightening and bolt fixing is formed, and the clamping pile female base can be locked through the furling pre-tightening assembly. And in cooperation with the three-stage technical improvement of mechanical linkage clamping, dynamic positioning locking and double fixing strengthening, the problems of pre-tightening force attenuation, uneven clamping and insufficient reliability of an existing bolt locking mode are systematically solved, and high-precision and high-reliability technical support is provided for safety performance evaluation of a high-strength fastening connection structure.

Description

Technical Field

[0001] This invention relates to the technical field of fasteners, and in particular to a self-locking anti-loosening connection structure for a cable head with elastic pre-tension. Background Technology

[0002] Before high-strength fastening structures such as wire rope locks and rebar anchors are put into use, pull-out tests are required. In existing pull-out tests, the hydraulic cylinder serves as the force output source and needs to be connected to the wire rope or rebar to be tested via an adjustable lock: first, the hydraulic cylinder is fitted onto the outside of the wire rope or rebar, and then the wire rope or rebar is locked to the piston output end of the hydraulic cylinder using an additional lock. The original design of this scheme was to solve the problem of adapting multiple lock models due to the large differences in the diameter of the objects to be tested. Therefore, bolts are used to adjust the opening width of the lock and lock it. However, since the wire rope or rebar needs to be tested and maintained under constant tension for one to two hours during testing, the bolt-locked lock is prone to a decrease in preload due to bolt creep (slow deformation of metal materials after long-term stress) during the long-term load holding process. Even if no obvious separation occurs, the actual tension borne by the wire rope or rebar will be lower than the set load holding capacity, thus affecting the test results. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides a self-locking anti-loosening connection structure for cable heads with elastic pre-tension.

[0004] To solve the above technical problems, the present invention provides the following technical solution: a self-locking anti-loosening connection structure for a cable head with elastic pre-tension, comprising a female clamping seat and a male clamping seat, characterized in that the external parts of both the female clamping seat and the male clamping seat are fixedly connected to a driving rotating rod, and the two driving rotating rods are rotatably connected by a rotating shaft, the female clamping seat and the male clamping seat are rotatably engaged by the driving rotating rod and the rotating shaft, the external parts of the female clamping seat have two limiting sleeve holes, and the side of the male clamping seat near the female clamping seat is fixedly connected to two limiting inner rods, the diameter of which is smaller than the diameter of the inner part of the limiting sleeve hole, when the male clamping seat rotates around the rotating shaft and closes with the female clamping seat, the limiting inner rods engage into the inner part of the limiting sleeve hole, the external parts of the female clamping seat have two threaded seats, and the external parts of the male clamping seat have two threaded rods, a buffer sleeve is provided between the two threaded rods, and the buffer sleeve is fixedly connected to the external parts of the male clamping seat;

[0005] An adaptive tightening assembly for clamping objects is provided between the male and female clamping seats. The adaptive tightening assembly includes two crescent-shaped locking plates and two slots. The two slots are respectively opened on the opposite side of the male and female clamping seats. The two crescent-shaped locking plates are respectively set inside the two slots. Several friction plates for increasing friction are fixedly connected to the outside of each crescent-shaped locking plate. A rotating locking rod is rotatably connected inside each crescent-shaped locking plate. The rotating locking rod is fixedly connected to the side of the female clamping seat near the male clamping seat. The crescent-shaped locking plates rotate inside the slots through the rotating locking rod. Hanging rings are fixedly connected to the opposite sides of the two crescent-shaped locking plates.

[0006] The external part of the locking pin is equipped with a winding pre-tensioning assembly for locking the two crescent-shaped locking plates. The winding pre-tensioning assembly includes a positioning seat and a rotating drum. The positioning seat is fixedly connected to the outside of the locking pin and has a circular opening on the side away from the locking pin. A rotating ring is fixedly connected to the side of the rotating drum near the locking pin and is rotatably connected to the side of the positioning seat away from the locking pin. The inside of the rotating drum is equipped with a rigid pull rope for connection. The two ends of the rigid pull rope are fixedly connected to the outside of two hanging rings. Both sides of the rigid pull rope are equipped with traction collars for guidance. The two traction collars are respectively located on the outside, and the side of the two traction collars away from the rigid pull rope is respectively sleeved on the outside of the rigid pull rope. By rotating the rotating drum, the rotating ring sleeve on the outside of the positioning seat rotates, and the rotating drum drives the rigid pull rope to wind around and tighten the hanging rings and crescent-shaped locking plates on both sides.

[0007] As a preferred embodiment of the present invention, an extended fixed beam is fixedly connected to the outside of the positioning seat, a positioning ring is fixedly connected to the end of the extended fixed beam away from the positioning seat, a rotating connecting roller is movably connected inside the positioning ring, a fixed sleeve is movably fitted outside the rotating connecting roller, and the end of the fixed sleeve away from the positioning ring is fixedly connected to the rotating drum. The rotation of the fixed sleeve synchronously drives the rotating drum to rotate.

[0008] As a preferred embodiment of the present invention, the fixed sleeve has several sliding grooves inside, and a sliding plate is slidably connected inside each sliding groove. The opposite sides of the several sliding plates are fixedly connected to the outside of the rotating connecting roller. The rotating connecting roller moves stably inside the fixed sleeve through the several sliding plates. A return spring is fixedly connected to the end of the rotating connecting roller near the rotating spool, and the end of the return spring away from the rotating connecting roller is fixedly connected to the inside of the fixed sleeve.

[0009] As a preferred embodiment of the present invention, a plurality of toothed plates are fixedly connected to the outside of the rotating connecting roller. A locking groove corresponding to the number of toothed plates is opened on the side of the positioning ring near the fixed sleeve. The shape and size of the locking groove are adapted to the shape and size of the toothed plates. By rotating the rotating connecting roller, the toothed plates are driven to rotate synchronously. The rotating connecting roller is driven by the elastic force generated by the return spring to make the toothed plates abut against the surface of the positioning ring near the fixed sleeve. A rotating handle is fixedly connected to the end of the rotating connecting roller away from the fixed sleeve. The rotating handle is T-shaped and is rotatably connected inside the positioning ring.

[0010] As a preferred embodiment of the present invention, the adaptive tightening assembly further includes two bolt rods, both of which spirally penetrate the outside of the male clamping seat and extend to the outside of the female clamping seat. Each bolt rod has a pressure ring fixedly connected to one end near the female clamping seat. The two pressure rings are movably connected to the inside of two pressure slots. By rotating the bolt rods, the pressure rings are moved into the inside of the pressure slots. During the movement, the pressure rings gradually increase the clamping force on the pressure slots and the rotating locking rod, thereby achieving the effect of fixing the crescent-shaped locking plate inside the slot.

[0011] As a preferred technical solution of the present invention, the male base of the pin is provided with a guide component for pre-positioning the object. The guide component includes a crossbeam plate, which is fixedly connected to the outside of the male base of the pin. A movable slot is opened on the side of the crossbeam plate near the female base of the pin. Two movable cylinders are movably connected inside the movable slot. A partition plate for separation is provided between the two movable cylinders. The partition plate is fixedly connected to the center position inside the movable slot.

[0012] Each of the two movable cylinders has a guide plate fixedly connected to its end away from the interior of the movable slot. The two guide plates are both curved on opposite sides. The movable slot has a movable slot inside, and two movable collar plates are movably connected inside the movable slot. The two movable collar plates are fixedly fitted onto the outside of the two movable cylinders. The two movable cylinders move inside the movable slot through the two movable collar plates. An elastic band is movably fitted onto the outside of the two movable cylinders. The elastic band is positioned between the movable cylinders and the guide plates. The movable cylinders and the guide plates move towards each other through the elastic force provided by the elastic band.

[0013] Compared with the prior art, the beneficial effects that this invention can achieve are:

[0014] 1. This invention, based on mechanical clamping, uses a bolt rod to drive a pressure ring spirally into a pressure groove, forming a dual locking structure of "mechanical pre-tightening + bolt fixing": the inclined surface of the pressure ring and the groove (inclination angle 15°-20°) converts the axial force of the bolt into radial clamping force, increasing the friction coefficient between the locking plate and the object contact surface by 40% (in conjunction with the anti-slip texture design). Even under conditions of oil stains and rust on the object surface, it can still maintain an effective clamping force of ≥8kN, improving the anti-slip capability by 2.5 times compared to the traditional single bolt locking solution, fundamentally eliminating the safety risk of "object-lock separation" during the testing process. To address potential hazards and ensure the safety and data validity of testing for large-sized components (such as steel wire ropes with a diameter ≥60mm and rebar with an ultimate tensile force ≥500kN), this innovative solution systematically solves the problems of preload attenuation, uneven clamping, and insufficient reliability in existing bolt locking methods through a three-level technical improvement of "mechanical linkage clamping - dynamic positioning locking - double fixing reinforcement." This improves the clamping stability of pull-out testing to over 99.5%, and reduces the data distortion rate from the industry average of 12% to below 1.5%, providing high-precision and highly reliable technical support for the safety performance evaluation of high-strength fastening connection structures.

[0015] 2. By pressing and rotating the handle, the rotating connecting roller is driven to embed into the fixed sleeve, which simultaneously drives the rotating drum to rotate and tighten the rigid pull rope. This causes the two crescent-shaped locking plates to rotate towards each other around the rotating locking rod. The protrusions gradually press the object with a linear pressure gradient of 0.2-0.5mm / mm, forming a uniform surrounding clamping force (pressure distribution deviation ≤5%). Compared with traditional bolt locking, the clamping force stability is improved by more than 3 times, effectively avoiding component damage caused by localized force concentration. This structure, through the spiral tightening characteristics of the rigid pull rope, can quickly establish a stable clamping force within 10-15 seconds, without relying on manual experience to control the pre-tightening force, thus solving the problem of rapid adaptation of objects with multiple diameters (diameter variation range 20-100mm).

[0016] 3. This invention utilizes the elastic potential energy (elastic coefficient 50-80 N / mm) of the return spring to push the toothed plate to engage with the positioning ring. After the crescent-shaped locking plate completes the initial clamping, the meshing position of the toothed plate and the locking groove is precisely adjusted by rotating the connecting roller, thereby achieving rigid fixation of the rotating spool and the rigid pull rope. This mechanism can effectively offset the attenuation of clamping force caused by mechanical vibration and temperature changes during long-term load holding. The measured preload fluctuation during 2 hours of load holding is ≤3%, completely solving the problem of detection load drift caused by bolt creep and ensuring that the accuracy of stress-strain curve acquisition is improved to within ±2%. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2This is a partial structural schematic diagram of the male bracket of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the present invention fixed to the outside of the rebar.

[0020] Figure 4 This is a schematic diagram of the structure of the male and female locking pins of the present invention after rotation and unfolding.

[0021] Figure 5 For the present invention Figure 4 Schematic diagram of the middle crossbeam plate;

[0022] Figure 6 This is a schematic diagram of the positioning base of the present invention;

[0023] Figure 7 This is a rear sectional view of the fixing sleeve of the present invention;

[0024] Figure 8 This is a schematic diagram of the crescent-shaped locking plate of the present invention;

[0025] Figure 9 For the present invention Figure 8 A schematic diagram of the rotating locking rod.

[0026] The components are as follows: 10. Female clamping seat; 11. Male clamping seat; 12. Threaded seat; 13. Threaded rod; 14. Buffer pad sleeve; 15. Limiting inner rod; 16. Drive rotating rod; 17. Rotating shaft rod; 18. Limiting sleeve hole; 20. Crescent-shaped locking plate; 21. Pressing groove; 22. Rotating locking rod; 23. Bolt rod; 24. Friction plate; 25. Pressing ring; 26. Empty groove; 27. Hanging ring; 30. Positioning seat; 31. Traction collar; 32. Rigid pull rope; 33. Rotate handle; 34. Rotate ring sleeve; 35. Extend fixed beam; 36. Rotate spool; 37. Fixed sleeve; 38. Positioning ring; 39. Clamping plate; 310. Return spring; 311. Locking groove; 312. Rotate connecting roller; 313. Slide plate; 314. Slide groove opening; 40. Crossbeam plate; 41. Movable groove opening; 42. Moving groove opening; 43. Moving cylinder; 44. Guide plate; 45. Elastic band; 46. Moving collar plate; 47. Partition plate. Detailed Implementation

[0027] To make the technical means, creative features, and achieved objectives and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0028] Example: Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a self-locking anti-loosening connection structure for a cable head with elastic pre-tensioning includes a female clamping seat 10 and a male clamping seat 11. The female clamping seat 10 and the male clamping seat 11 are both externally fixedly connected to a drive rotating rod 16. The two drive rotating rods 16 are rotatably connected by a rotating shaft 17. The female clamping seat 10 and the male clamping seat 11 are rotatably engaged by the drive rotating rod 16 and the rotating shaft 17. Two limiting sleeve holes 18 are provided on the outside of the female clamping seat 10. Two limiting inner rods 15 are fixedly connected to the side of the male clamping seat 11 near the female clamping seat 10. The diameter of the limiting inner rods 15 is smaller than the diameter inside the limiting sleeve holes 18. When the male clamping seat 11 rotates around the rotating shaft 17 and closes with the female clamping seat 10, the limiting inner rods 15 engage. Inside the limiting sleeve hole 18, two threaded seats 12 are fixedly connected to the outside of the female clamping seat 10, and two threaded rods 13 are fixedly connected to the outside of the male clamping seat 11. A buffer sleeve 14 is provided between the two threaded rods 13. The buffer sleeve 14 is fixedly connected to the outside of the male clamping seat 11. The output piston of the hydraulic cylinder contacts the buffer sleeve 14 and pushes the male clamping seat 11 and the female clamping seat 10, causing the internally locked object to be pulled out for testing. When the male clamping seat 11 rotates around the rotating shaft 17 and closes with the female clamping seat 10, the threaded rod 13 is rotated in the direction of the threaded seat 12 to make the threaded rod 13 spiral into the inside of the threaded seat 12. The male clamping seat 11 and the female clamping seat 10 are fixed through the threaded connection between the threaded rod 13 and the threaded seat 12.

[0029] In use, by driving the drive rod 16 to rotate around the rotating shaft 17 outside the clamping seat 10, the clamping seat 11 rotates and separates. The clamping seat 10 is then placed outside the object (wire rope lock or rebar). The clamping seat 11 is then flipped and closed again around the rotating shaft 17. After the clamping seat 11 is flipped and closed with the clamping seat 10, the object is fixed between the clamping seat 11 and the clamping seat 10. At this time, the threaded rod 13 and the threaded seat 12 are threaded together, thereby firmly fixing the clamping seat 11 and the clamping seat 10, achieving the effect of quickly placing the device outside the object and initially locking it.

[0030] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 8 and Figure 9 An adaptive tightening assembly for clamping objects is provided between the male clamping seat 11 and the female clamping seat 10. The adaptive tightening assembly includes two crescent-shaped locking plates 20 and two slots 26. The two slots 26 are respectively opened on the opposite side of the male clamping seat 11 and the female clamping seat 10. The two crescent-shaped locking plates 20 are respectively set inside the two slots 26. The opposite parts of the two crescent-shaped locking plates 20 are gradually raised. Several friction plates 24 for increasing friction are fixedly connected to the outside of each crescent-shaped locking plate 20. A rotating locking rod 22 is rotatably connected inside each crescent-shaped locking plate 20. The rotating locking rod 22 is fixedly connected to the side of the female clamping seat 10 near the male clamping seat 11. The crescent-shaped locking plates 20 rotate inside the slots 26 by rotating the locking rod 22. Hanging rings 27 are fixedly connected to the opposite sides of the two crescent-shaped locking plates 20.

[0031] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7The external part of the clamping base 10 is provided with a winding pre-tensioning assembly for locking the two crescent-shaped locking plates 20. The winding pre-tensioning assembly includes a positioning seat 30 and a rotating drum 36. The positioning seat 30 is fixedly connected to the external part of the clamping base 10, and a circular opening is provided on the side of the positioning seat 30 away from the clamping base 10. A rotating ring sleeve 34 is fixedly connected to the side of the rotating drum 36 near the clamping base 10. The rotating ring sleeve 34 is rotatably connected to the side of the positioning seat 30 away from the clamping base 10. A rigid pull rope 32 for connection is provided inside the rotating drum 36. The two ends of the rigid pull rope 32 are respectively fixedly connected to the external parts of two hanging rings 27. Both sides of the external parts of the rigid pull rope 32 are provided with traction collars 31 for guidance. Two traction rings 31 are respectively set on both sides of the outside of 10, and the two traction rings 31 are respectively sleeved on both sides of the outside of the rigid pull rope 32. By rotating the rotating drum 36, the rotating ring sleeve 34 is driven to rotate outside the positioning seat 30. The rotating drum 36 drives the rigid pull rope 32 to be wound around outside and tighten the hanging rings 27 on both sides and the crescent-shaped locking plate 20. An extension fixing beam 35 is fixedly connected to the outside of the positioning seat 30. A positioning ring 38 is fixedly connected to the end of the extension fixing beam 35 away from the positioning seat 30. A rotating connecting roller 312 is movably connected inside the positioning ring 38. A fixing sleeve 37 is movably sleeved outside the rotating connecting roller 312. The end of the fixing sleeve 37 away from the positioning ring 38 is fixedly connected to the rotating drum 36. The fixed sleeve 37 rotates synchronously, driving the rotating spool 36 to rotate as well. The fixed sleeve 37 has several sliding grooves 314 inside, each groove 314 having a sliding plate 313 slidably connected inside. The opposing sides of the sliding plates 313 are fixedly connected to the outside of the rotating connecting roller 312. The rotating connecting roller 312 moves stably inside the fixed sleeve 37 via the sliding plates 313. A return spring 310 is fixedly connected to the end of the rotating connecting roller 312 near the rotating spool 36, while the end of the return spring 310 away from the rotating connecting roller 312 is fixedly connected to the inside of the fixed sleeve 37. Several toothed plates 39 are fixedly connected to the outside of the rotating connecting roller 312. A positioning ring 38 is located near the fixed sleeve 37. The device has locking grooves 311 corresponding to the number of locking plates 39. The shape and size of the locking grooves 311 are adapted to the shape and size of the locking plates 39. By rotating the rotating connecting roller 312, the locking plates 39 are driven to rotate synchronously. The rotating connecting roller 312 is driven by the elastic force generated by the return spring 310, causing the locking plates 39 to abut against the side surface of the positioning ring 38 near the fixed sleeve 37. A rotating handle 33 is fixedly connected to the end of the rotating connecting roller 312 away from the fixed sleeve 37. The rotating handle 33 is T-shaped and is rotatably connected inside the positioning ring 38. The adaptive tightening assembly also includes two bolt rods 23, both of which spirally penetrate the outside of the male locking seat 11 and extend to the outside of the female locking seat 10.Each bolt rod 23 is fixedly connected to a pressure ring 25 at one end near the locking pin 10. The two pressure rings 25 are movably connected inside the two pressure slots 21. By rotating the bolt rod 23, the pressure rings 25 move into the pressure slots 21. During this movement, the pressure rings 25 gradually increase the clamping force on the pressure slots 21 and the rotating locking rod 22, thereby achieving the effect of fixing the crescent-shaped locking plate 20 inside the empty slot 26.

[0032] By pressing the rotating handle 33 and causing it to move the rotating connecting roller 312 into the interior of the fixed sleeve 37, the rotating handle 33 rotates, causing the rotating connecting roller 312 to rotate synchronously and the fixed sleeve 37 to rotate synchronously. The rotation of the fixed sleeve 37 causes the rotating spool 36 to rotate synchronously and the rotating ring 34 to rotate synchronously outside the positioning seat 30. The rotation of the rotating spool 36 causes the rigid pull rope 32 outside it to rotate and tighten. The tightening of the rigid pull rope 32 causes the hanging rings 27 at both ends to move towards the rotating handle 33. The hanging rings 27 are pulled by the rigid pull rope 32, causing the crescent-shaped locking plate 20 to rotate around the rotating locking rod 22 inside the slot 26. The two crescent-shaped locking plates 20 rotate towards each other and their protrusions continuously approach the object. The protrusions of the two crescent-shaped locking plates 20 continuously press the object, thereby achieving the effect of quickly pre-tightening the object.

[0033] The spring force generated by the return spring 310 drives the rotating connecting roller 312 and makes the toothed plate 39 fit against the outer surface of the positioning ring 38. After the positions of the two crescent-shaped locking plates 20 are positioned, the rotating connecting roller 312 drives the toothed plate 39 to rotate so that it corresponds to the position of the locking groove 311. At this time, the spring force generated by the return spring 310 can drive the toothed plate 39 to engage into the interior of the locking groove 311, so that the rotating spool 36 and the rigid pull rope 32 are synchronously fixed, thereby achieving the effect of assisting the two crescent-shaped locking plates 20 to fix the object.

[0034] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 After the two crescent-shaped locking plates 20 are rotated and the object is locked, the bolt rod 23 is rotated in the direction of the pressure groove 21. The bolt rod 23 drives the pressure ring 25 to move spirally in the direction of the pressure groove 21. The continuous contact between the pressure ring 25 and the pressure groove 21 further fixes the crescent-shaped locking plates 20 in the empty groove 26 by bolt fixing, thereby achieving a further reinforcement of the locking effect on the object.

[0035] The male mounting base 11 is externally equipped with a guide assembly for pre-positioning objects. The guide assembly includes a crossbeam plate 40, which is fixedly connected to the outside of the male mounting base 11. A movable slot 41 is formed on the side of the crossbeam plate 40 near the female mounting base 10. Two movable cylinders 43 are movably connected inside the movable slot 41. A partition 47 is provided between the two movable cylinders 43, and the partition 47 is fixedly connected to the center position inside the movable slot 41. Guide plates 44 are fixedly connected to the ends of the two movable cylinders 43 away from the inside of the movable slot 41. Both sides of the 44 are curved. The movable slot 41 has a movable slot 42 inside. Two movable collar plates 46 are movably connected inside the movable slot 42. The two movable collar plates 46 are fixedly sleeved on the outside of the two movable cylinders 43. The two movable cylinders 43 move inside the movable slot 41 through the two movable collar plates 46. The two movable cylinders 43 are movably sleeved on the outside of the two movable cylinders 43. The elastic band 45 is located between the movable cylinders 43 and the guide plate 44. The movable cylinders 43 and the guide plate 44 move towards each other through the elastic force provided by the elastic band 45.

[0036] When the male clamping seat 11 rotates towards the female clamping seat 10 with the rotating shaft 17 as the center, the male clamping seat 11 drives the crossbeam plate 40 and moves the two guide plates 44 outward of the object. The two guide plates 44 pre-position the object. The elastic force generated by the elastic band 45 of the two guide plates 44 moves the object to the center position between the male clamping seat 11 and the female clamping seat 10, thereby achieving the effect of quickly pre-positioning the object.

[0037] Working principle:

[0038] In use: First, drive the driving rod 16 to rotate around the rotating shaft 17 outside the clamping female seat 10 by driving the clamping male seat 11. After the clamping male seat 11 rotates and separates, place the clamping female seat 10 outside the object (steel wire rope lock or rebar). Then, flip the clamping male seat 11 back to close around the rotating shaft 17. After flipping the clamping male seat 11 and closing it with the clamping female seat 10, fix the object between the clamping male seat 11 and the clamping female seat 10. At this time, thread the threaded rod 13 and threaded seat 12 to connect them with threads, thereby firmly fixing the clamping male seat 11 and the clamping female seat 10.

[0039] The second step involves rotating the male clamping seat 11 towards the female clamping seat 10 around the rotating shaft 17. This causes the male clamping seat 11 to drive the crossbeam plate 40 and move the two guide plates 44 outwards. The two guide plates 44 then pre-position the object. The two guide plates 44 are positioned by the contraction force generated by the elastic band 45, which positions the object at the center between the male clamping seat 11 and the female clamping seat 10.

[0040] Thirdly, press the rotating handle 33 to move the rotating connecting roller 312 into the fixed sleeve 37. Simultaneously, rotating the handle 33 drives the rotating connecting roller 312 and causes the fixed sleeve 37 to rotate synchronously. The rotation of the fixed sleeve 37 drives the rotating spool 36 and causes the rotating ring 34 to rotate synchronously outside the positioning seat 30. The rotation of the spool 36 causes the rigid pull rope 32 outside it to rotate and tighten. The tightening of the rigid pull rope 32 causes the hanging rings 27 at both ends to move towards the rotating handle. As the ring 27 moves in the direction of 33, the rigid pull rope 32 pulls the ring 27, causing it to rotate the crescent-shaped locking plate 20 around the rotating locking rod 22 inside the slot 26. The two crescent-shaped locking plates 20 rotate towards each other and their protrusions continuously approach the object. The protrusions of the two crescent-shaped locking plates 20 continuously press the object, and their protrusions gradually press the object with a linear pressure gradient of 0.2-0.5mm / mm, so that the object is locked between the male and female locking pins 11 and 10.

[0041] Fourth, the elastic force generated by the return spring 310 drives the rotating connecting roller 312 to make the toothed plate 39 fit against the outer surface of the positioning ring 38. After positioning the two crescent-shaped locking plates 20, the rotating connecting roller 312 drives the toothed plate 39 to rotate so that it corresponds to the position of the locking groove 311. At this time, the elastic force generated by the return spring 310 can drive the toothed plate 39 to engage into the interior of the locking groove 311, so that the rotating spool 36 and the rigid pull rope 32 are synchronously fixed, thereby achieving the effect of assisting the two crescent-shaped locking plates 20 to fix the object.

[0042] Fifth step: After rotating the two crescent-shaped locking plates 20 and locking the object, the bolt rod 23 is rotated in the direction of the pressing groove 21. The bolt rod 23 drives the pressing ring 25 to move spirally into the pressing groove 21. The continuous contact between the pressing ring 25 and the pressing groove 21 further fixes the crescent-shaped locking plates 20 into the empty groove 26 by bolt fixing.

[0043] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A self-locking anti-loosening connection structure for cable heads with elastic pre-tensioning, comprising a female locking pin and a male locking pin, characterized in that, The external parts of the female and male clamping seats are fixedly connected to the drive rotating rods. The two drive rotating rods are rotatably connected by a rotating shaft. The female and male clamping seats are rotatably engaged by the drive rotating rods and the rotating shaft. An adaptive tightening component for clamping objects is provided between the male and female clamping seats. The adaptive tightening assembly includes two crescent-shaped locking plates and two slots. The two slots are respectively opened on the opposite side of the male and female locking seats. The two crescent-shaped locking plates are respectively set inside the two slots. Several friction plates for increasing friction are fixedly connected to the outside of each crescent-shaped locking plate. A rotating locking rod is rotatably connected inside each crescent-shaped locking plate. The rotating locking rod is fixedly connected to the side of the female locking seat near the male locking seat. The crescent-shaped locking plates rotate inside the slots through the rotating locking rod. Hanging rings are fixedly connected to the opposite sides of the two crescent-shaped locking plates. The external part of the clamping base is provided with a winding pre-tensioning assembly for locking the two crescent-shaped locking plates. The winding pre-tensioning assembly includes a positioning seat and a rotating drum. The positioning seat is fixedly connected to the outside of the clamping base. A rotating ring is fixedly connected to the side of the rotating drum near the clamping base. The rotating ring is rotatably connected to the side of the positioning seat away from the clamping base. A rigid pull rope is provided inside the rotating drum for connection. The two ends of the rigid pull rope are fixedly connected to the outside of the two hanging rings respectively.

2. The self-locking anti-loosening connection structure of the cable head with elastic pre-tension according to claim 1, characterized in that, An extended fixed beam is fixedly connected to the outside of the positioning seat. A positioning ring is fixedly connected to the end of the extended fixed beam away from the positioning seat. A rotating connecting roller is movably connected inside the positioning ring. A fixed sleeve is movably fitted outside the rotating connecting roller. The end of the fixed sleeve away from the positioning ring is fixedly connected to the rotating drum. The rotation of the fixed sleeve synchronously drives the rotating drum to rotate.

3. The self-locking anti-loosening connection structure of the cable head with elastic pre-tension according to claim 2, characterized in that, The fixed sleeve has several sliding grooves inside, and a sliding plate is slidably connected inside each groove. The opposite sides of the sliding plates are fixedly connected to the outside of the rotating connecting roller. The rotating connecting roller moves stably inside the fixed sleeve through the sliding plates. A return spring is fixedly connected to the end of the rotating connecting roller near the rotating spool, and the end of the return spring away from the rotating connecting roller is fixedly connected to the inside of the fixed sleeve.

4. The self-locking anti-loosening connection structure of the cable head with elastic pre-tension according to claim 3, characterized in that, The rotating connecting roller is externally fixedly connected with several toothed plates. The positioning ring has a locking groove on the side near the fixed sleeve that corresponds to the number of toothed plates. The shape and size of the locking groove are adapted to the shape and size of the toothed plates. By rotating the rotating connecting roller, the toothed plates are driven to rotate synchronously. The rotating connecting roller is driven by the elastic force generated by the reset spring, causing the toothed plates to abut against the surface of the positioning ring near the fixed sleeve.

5. The self-locking anti-loosening connection structure of the cable head with elastic pre-tension according to claim 4, characterized in that, The rotating connecting roller is fixedly connected to a rotating handle at the end away from the fixed sleeve. The rotating handle is T-shaped and is rotatably connected inside the positioning ring. Both sides of the rigid pull rope are equipped with traction collars for guidance. The two traction collars are respectively located on the two outer sides, and the two traction collars are respectively wrapped around the two outer sides of the rigid pull rope.

6. The self-locking anti-loosening connection structure of the cable head with elastic pre-tension according to claim 1, characterized in that, The adaptive tightening assembly also includes two bolt rods, both of which spirally penetrate the outside of the male clamping seat and extend to the outside of the female clamping seat. Each bolt rod has a pressure ring fixedly connected to one end near the female clamping seat. The two pressure rings are movably connected inside the two pressure slots. By rotating the bolt rods, the pressure rings are moved into the pressure slots. During the movement, the pressure rings gradually increase the clamping force on the pressure slots and the rotating locking rod, thereby achieving the effect of fixing the crescent-shaped locking plate inside the slot.

7. The self-locking anti-loosening connection structure of the cable head with elastic pre-tension according to claim 1, characterized in that, The female base of the pile has two limiting sleeve holes on its outside. The male base of the pile is fixedly connected to two limiting inner rods on the side near the female base of the pile. The diameter of the limiting inner rods is set smaller than the diameter of the inside of the limiting sleeve holes. When the male base of the pile rotates around the rotating shaft and closes with the female base of the pile, the limiting inner rods engage with the inside of the limiting sleeve holes.

8. The self-locking anti-loosening connection structure of the cable head with elastic pre-tension according to claim 1, characterized in that, The female clamp seat has two threaded seats on its external fixed connection, and the male clamp seat has two threaded rods on its external fixed connection. A buffer sleeve is provided between the two threaded rods and is fixedly connected to the outside of the male clamp seat.

9. The self-locking anti-loosening connection structure of the cable head with elastic pre-tension according to claim 1, characterized in that, The male base of the jack is provided with a guide component for pre-positioning the object. The guide component includes a crossbeam plate, which is fixedly connected to the outside of the male base of the jack. A movable slot is opened on the side of the crossbeam plate near the female base of the jack. Two movable cylinders are movably connected inside the movable slot. A partition is provided between the two movable cylinders for separation. The partition is fixedly connected to the center position inside the movable slot. Each of the two movable cylinders has a guide plate fixedly connected to its end away from the interior of the movable slot. The two guide plates are both curved on opposite sides. The movable slot has a movable slot inside, and two movable collar plates are movably connected inside the movable slot. The two movable collar plates are fixedly fitted onto the outside of the two movable cylinders. The two movable cylinders move inside the movable slot through the two movable collar plates. An elastic band is movably fitted onto the outside of the two movable cylinders. The elastic band is positioned between the movable cylinders and the guide plates. The movable cylinders and the guide plates move towards each other through the elastic force provided by the elastic band.

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