A self-locking guide rail floating electrical connector

Abstract

The present invention belongs to the technical field of electrical connectors, and provides a self-locking guide rail floating electrical connector, including a connecting head and a connecting seat, wherein the connecting head includes a docking tube and a bearing tube, an adjusting assembly is arranged between the docking tube and the bearing tube, the docking tube and the bearing tube are fixedly connected through the adjusting assembly, a docking block is symmetrically and fixedly connected to the docking tube, a receiving groove is symmetrically and horizontally opened on the inner wall of the bearing tube, a receiving hole is horizontally opened on the inner wall of the receiving groove, a first sliding block is arranged in the receiving groove, a first elastic member is arranged in the receiving hole, and one end of the first elastic member is fixedly connected to the inner wall of the receiving hole; the present invention completely pushes the docking block out of the docking groove through a telescopic rod, so that the adjusting tube drives the adjusting ring to reset through the first tooth block and the second tooth block, and the adjusting ring drives the protective plate to reset, thereby protecting the plug, avoiding the plug from being exposed to the outside, and reducing the probability of the plug being contaminated with dust, rainwater and other substances, thereby causing the probability of circuit docking failure.

Description

Technical Field

[0001] The invention belongs to the technical field of electric connectors, in particular to a self-locking guide rail floating electric connector. Background Art

[0002] Self-locking rail floating electrical connectors are suitable for scenarios where frequent connection and disassembly are required and the connection must be stable and reliable. They are widely used in various industries such as industrial manufacturing, transportation, and energy.

[0003] The existing patent (patent publication number: CN113437580B) discloses a self-locking guide rail separation floating electrical connector, including a plug and a socket that are matched and plugged together, the plug includes an unlocking sleeve and a locking sleeve, the unlocking sleeve is slidably sleeved on the outer ring of the locking sleeve, a plurality of spring tongues are arranged on the locking sleeve, a snap-fitting portion is arranged at the free end of the spring tongue, a first window is provided on the unlocking sleeve corresponding to the snap-fitting portion, a snap-fitting portion passes through the first window and snaps with the snap-fitting portion, and an outwardly extending connecting rod is arranged at the rear end of the unlocking sleeve; when separating, the connecting rod drives the unlocking sleeve to slide relative to the locking sleeve, so that the first window squeezes the snap-fitting portion to shrink inwardly and separates from the snap-fitting portion to unlock. The present invention provides a self-locking guide rail separation floating electrical connector, when the aircraft is launched, the connecting rod moves along the track, thereby driving the unlocking sleeve to unlock, and after the connector completes signal transmission, fixed-point separation is achieved, and at the same time, the first window is used to squeeze the snap-fitting portion to shrink inwardly to ensure reliable unlocking.

[0004] In the process of implementing the above solution, the inventors found that the prior art had the following unresolved problems: although the prior art can complete the circuit docking, it does not protect the connector, so that the connector is exposed, causing the connector to be easily contaminated by dust, rainwater and other substances, thereby increasing the probability of circuit docking failure. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a self-locking guide rail floating electrical connector to solve the problem in the prior art that the connector is not protected and is exposed to the outside.

[0006] The technical solution of the present invention is as follows:

[0007] A self-locking guide rail floating electrical connector, comprising a connector and a connector seat, wherein the connector comprises a docking tube and a bearing tube, an adjusting assembly is arranged between the docking tube and the bearing tube, the docking tube and the bearing tube are fixedly connected through the adjusting assembly, a docking block is symmetrically and fixedly connected to the docking tube, a receiving groove is symmetrically and horizontally opened on the inner wall of the bearing tube, a receiving hole is horizontally opened on the inner wall of the receiving groove, a first sliding block is arranged in the receiving groove, a first elastic member is arranged in the receiving hole, one end of the first elastic member is fixedly connected to the inner wall of the receiving hole, and the other end of the first elastic member is fixedly connected to the first sliding block, a plug is arranged in the bearing tube, one end of the plug is fixedly connected to the inner wall of the bearing tube, an adjusting plate is slidably connected to the plug, and the adjusting plate is fixedly connected to the first sliding block;

[0008] The connecting seat includes a bearing plate, a socket, a limiting cylinder and an adjusting cylinder are arranged on one side of the bearing plate, one end of the limiting cylinder is fixedly connected to the bearing plate, the adjusting cylinder and the bearing plate are connected by a torsion spring, the limiting cylinder is located inside the adjusting cylinder, the socket is located inside the limiting cylinder, docking grooves are horizontally symmetrically provided on the inner wall of the limiting cylinder, through holes are symmetrically and vertically provided on the limiting cylinder, the through holes are connected to the docking grooves, a connecting assembly is arranged in the docking groove, and a plurality of first tooth blocks are fixedly connected to the inner wall of the adjusting cylinder.

[0009] Preferably, the adjustment assembly includes a first connecting ring and a second connecting ring, the first connecting ring is fixedly connected to the docking tube, the second connecting ring is fixedly connected to the bearing tube, and a plurality of protective plates are arranged between the first connecting ring and the second connecting ring.

[0010] Preferably, a connecting shaft is horizontally provided on the protective plate, and two ends of the connecting shaft horizontally penetrate the first connecting ring and the second connecting ring respectively, and the connecting shaft is connected to the protective plate, the first connecting ring and the second connecting ring through bearings.

[0011] Preferably, an adjustment ring is provided on the outer side of the first connecting ring and the second connecting ring, a plurality of second tooth blocks are fixedly connected to the adjustment ring, and first connecting grooves are horizontally opened on both sides of the adjustment ring.

[0012] Preferably, a second connecting groove is horizontally opened on the first connecting ring and the second connecting ring, a connecting rod is arranged on the inner side of the adjusting ring, one end of the connecting rod is located in the first connecting groove, and the other end of the connecting rod is located in the second connecting groove.

[0013] Preferably, a first limit shaft and a second limit shaft are horizontally passed through both ends of the connecting rod, the first limit shaft is connected to the connecting rod through a bearing, the first limit shaft is fixedly connected to the adjustment ring, the second limit shaft horizontally passes through the protective plate, and the second limit shaft is connected to the protective plate through a bearing.

[0014] Preferably, the connecting assembly comprises a second slider and a telescopic rod located in the docking groove, one end of the telescopic rod is fixedly connected to the second slider, and the other end of the telescopic rod is fixedly connected to the bearing plate.

[0015] Preferably, the telescopic rod is hollow, and a second elastic member and a blocking block are provided inside the telescopic rod, one end of the second elastic member is fixedly connected to the inner wall of the telescopic rod, the other end of the second elastic member is fixedly connected to the blocking block, and the blocking block is fixedly connected to the inner wall of the telescopic rod.

[0016] Preferably, a connecting hole is vertically opened on the telescopic rod, the connecting hole is connected to the through hole, a fixed pulley is fixedly connected to one side of the blocking block, a connecting rope is arranged inside the telescopic rod, one end of the connecting rope is fixedly connected to the inner wall of the telescopic rod, and the other end of the connecting rope horizontally passes through the blocking block.

[0017] Preferably, one end of the connecting rope horizontally passes through the blocking block and passes through the fixed pulley, the connecting hole and the through hole to be fixedly connected to the inner wall of the adjusting cylinder, and the connecting rope is located on the inner side of the second elastic member.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention completely pushes the docking block out of the docking groove through the telescopic rod, so that the adjustment tube drives the adjustment ring to complete the reset through the first tooth block and the second tooth block, thereby protecting the plug, preventing the plug from being exposed, and reducing the probability of the plug being contaminated with dust, rainwater and other substances, thereby causing circuit docking failure.

[0020] 2. In the present invention, when the first elastic member is completely compressed back into the accommodating hole, the connection between the plug and the socket is completed. At this time, the connecting head and the connecting seat are loosened, and the second elastic member is relieved of the force, thereby driving the adjusting cylinder to reset, so that the adjusting cylinder drives the protective plate to reset through the adjusting ring and the connecting rod, so that one end of the protective plate enters the horizontally opened clamping groove on the outer wall of the socket, and then the protective plate clamps the socket to ensure the stable connection between the connecting head and the connecting seat.

[0021] 3. In the process of disconnecting the plug and the socket of the present invention, the pressure on the first elastic member decreases as the socket moves, thereby driving the adjustment plate to rise along the accommodating groove, so that the adjustment plate can smooth and correct the plug, avoiding the bending of the plug caused by shaking during the process of disconnecting the plug and the socket. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is a schematic diagram of the connector structure of the present invention.

[0024] Figure 3 It is a schematic cross-sectional view of the bearing tube structure of the present invention.

[0025] Figure 4 It is a schematic cross-sectional view of the bearing tube structure of the present invention.

[0026] Figure 5 It is a schematic diagram of the structure of the adjustment plate of the present invention.

[0027] Figure 6 It is a schematic diagram of the structure of the regulating component of the present invention.

[0028] Figure 7 It is a schematic diagram of the structure of the first connecting ring of the present invention.

[0029] Figure 8 It is a schematic diagram of the structure of the adjustment ring of the present invention.

[0030] Fig. 9 It is a schematic diagram of the second connecting ring structure of the present invention.

[0031] Fig.10 It is a structural schematic diagram of the connecting seat of the present invention.

[0032] Fig.11 It is a partially enlarged schematic diagram of the limiting cylinder structure of the present invention.

[0033] Fig.12 It is a schematic diagram of the structure of the connection assembly of the present invention.

[0034] Fig.13 It is an exploded schematic diagram of the connection component structure of the present invention.

[0035] Fig.14 It is a schematic diagram of the socket structure of the present invention.

[0036] In the figure: 1, connector; 11, docking tube; 12, bearing tube; 13, adjustment assembly; 14, docking block; 15, receiving groove; 16, receiving hole; 17, first slider; 18, first elastic member; 19, plug; 110, adjustment plate; 131, first connecting ring; 132, second connecting ring; 133, protective plate; 134, connecting shaft; 135, adjustment ring; 136, second tooth block; 137, first connecting groove; 138, second connecting Connecting groove; 139, connecting rod; 1310, first limiting axis; 1311, second limiting axis; 2, connecting seat; 21, bearing plate; 22, socket; 23, limiting cylinder; 24, adjusting cylinder; 25, docking groove; 26, through hole; 27, connecting assembly; 28, first tooth block; 271, second slider; 272, telescopic rod; 273, second elastic member; 274, blocking block; 275, connecting hole; 276, fixed pulley; 277, connecting rope. DETAILED DESCRIPTION

[0037] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0038] The present invention provides a self-locking guide rail floating electrical connector, comprising a connector 1 for connecting a circuit and a connector seat 2 for connecting a circuit arranged on one side of the connector 1, wherein the connector 1 comprises a docking sleeve 11 for docking the connector 1 and the connector seat 2 and a bearing sleeve 12 for accommodating a plug 19, an adjustment component 13 for protecting the plug 19 is arranged between the docking sleeve 11 and the bearing sleeve 12, the docking sleeve 11 and the bearing sleeve 12 are fixedly connected through the adjustment component 13, a docking block 14 for docking the connector 1 and the connector seat 2 is symmetrically fixedly connected on the docking sleeve 11, and an accommodating groove 15 for accommodating a first sliding block 17 is symmetrically and horizontally opened on the inner wall of the bearing sleeve 12, and a first sliding block 17 is symmetrically and horizontally opened on the inner wall of the bearing sleeve 12. A receiving hole 16 for receiving the first elastic member 18 is horizontally opened on the wall, a first slider 17 for limiting the adjusting plate 110 is arranged in the receiving groove 15, a first elastic member 18 for driving the first slider 17 to move along the receiving groove 15 through elastic deformation is arranged in the receiving hole 16, one end of the first elastic member 18 is fixedly connected to the inner wall of the receiving hole 16, and the other end of the first elastic member 18 is fixedly connected to the first slider 17, a plug 19 for connecting the circuit is arranged in the carrying tube 12, one end of the plug 19 is fixedly connected to the inner wall of the carrying tube 12, an adjusting plate 110 for adjusting the plug 19 is slidably connected to the plug 19, and the adjusting plate 110 is fixedly connected to the first slider 17.

[0039] It should be noted that: when not docked, the first elastic member 18 is in a natural state.

[0040] It should be noted that the connector 1 and the connector seat 2 can rotate freely during the process, thereby bearing stress and deformation from different directions, reducing the deviation between the connecting parts through floating, thereby improving the assembly accuracy.

[0041] The connecting seat 2 includes a bearing plate 21 for carrying the socket 22, the limiting cylinder 23 and the adjusting cylinder 24. The socket 22, the limiting cylinder 23 and the adjusting cylinder 24 for limiting the socket 22 are arranged on one side of the bearing plate 21. One end of the limiting cylinder 23 is fixedly connected to the bearing plate 21. The adjusting cylinder 24 is connected to the bearing plate 21 through a torsion spring. The limiting cylinder 23 is located inside the adjusting cylinder 24, and the socket 22 is located inside the limiting cylinder 23. A docking groove 25 for accommodating the connecting assembly 27 is horizontally and symmetrically provided on the inner wall of the limiting cylinder 23. A through hole 26 connecting the internal space of the adjusting cylinder 24 and the internal space of the limiting cylinder 23 is symmetrically and vertically provided on the limiting cylinder 23. The through hole 26 is communicated with the docking groove 25. A connecting assembly 27 connecting the limiting cylinder 23 and the adjusting cylinder 24 is arranged in the docking groove 25. A plurality of first tooth blocks 28 meshing with the adjusting assembly 13 are fixedly connected to the inner wall of the adjusting cylinder 24.

[0042] It should be noted that the adjustment tube 24 is connected to the bearing plate 21 via a torsion spring, and the torsion spring is in a tension state when not connected.

[0043] It should be noted that: Fig.14 As shown, a third connecting ring is fixedly connected to one side of the socket 22 , and the third connecting ring horizontally penetrates the bearing plate 21 , and the third connecting ring is slidably connected to the bearing plate 21 .

[0044] It should be noted that: Fig.14 As shown, a plurality of snap-in grooves are horizontally formed on the outer wall of the socket 22 .

[0045] The adjustment assembly 13 includes a first connecting ring 131 and a second connecting ring 132 for limiting the protective plate 133. The first connecting ring 131 is fixedly connected to the docking tube 11, and the second connecting ring 132 is fixedly connected to the bearing tube 12. A plurality of protective plates 133 for protecting the plug 19 are arranged between the first connecting ring 131 and the second connecting ring 132. A connecting shaft 134 connecting the first connecting ring 131 and the second connecting ring 132 is horizontally penetrated on the protective plate 133, and both ends of the connecting shaft 134 horizontally penetrate the first connecting ring 131 and the second connecting ring 132 respectively. The connecting shaft 134 is connected to the protective plate 133, the first connecting ring 131 and the second connecting ring 132 through bearings.

[0046] It should be noted that the number of the protective plates 133 is the same as the number of the card slots. Figure 6 , Attachment Figure 7 , Attachment Figure 8 and attached Fig.14 Only 6 are taken as examples.

[0047] An adjusting ring 135 for adjusting the position of the protective plate 133 is arranged on the outer side of the first connecting ring 131 and the second connecting ring 132, and a plurality of second tooth blocks 136 meshing with the first tooth blocks 28 are fixedly connected to the adjusting ring 135. First connecting grooves 137 for accommodating one end of a connecting rod 139 are horizontally opened on both sides of the adjusting ring 135; second connecting grooves 138 for accommodating the other end of the connecting rod 139 are horizontally opened on the first connecting ring 131 and the second connecting ring 132, and a connecting rod 139 connecting the adjusting ring 135 and the protective plate 133 is arranged on the inner side of the adjusting ring 135. One end of the rod 139 is located in the first connecting groove 137, and the other end of the connecting rod 139 is located in the second connecting groove 138; both ends of the connecting rod 139 are horizontally penetrated by a first limiting shaft 1310 for limiting one end of the connecting rod 139 and a second limiting shaft 1311 for limiting the other end of the connecting rod 139, the first limiting shaft 1310 is connected to the connecting rod 139 through a bearing, the first limiting shaft 1310 is fixedly connected to the adjusting ring 135, the second limiting shaft 1311 horizontally penetrates the protective plate 133, and the second limiting shaft 1311 is connected to the protective plate 133 through a bearing.

[0048] The connecting assembly 27 includes a second slider 271 located in the docking groove 25 and connected to the docking block 14, and a telescopic rod 272 that drives the second slider 271 to move along the docking groove 25, one end of the telescopic rod 272 is fixedly connected to the second slider 271, and the other end of the telescopic rod 272 is fixedly connected to the supporting plate 21; the telescopic rod 272 is hollow, and a second elastic member 273 that is elastically deformed under force and a blocking block 274 that fixes one end of the second elastic member 273 are provided in the telescopic rod 272, one end of the second elastic member 273 is fixedly connected to the inner wall of the telescopic rod 272, the other end of the second elastic member 273 is fixedly connected to the blocking block 274, and the blocking block 274 is fixedly connected to the inner wall of the telescopic rod 272.

[0049] It should be noted that the elastic coefficient of the second elastic member 273 is greater than the elastic coefficient of the torsion spring.

[0050] It should be noted that: Figure 5 and Fig.13 As shown, the first elastic member 18 and the second elastic member 273 are preferably springs.

[0051] A connecting hole 275 connecting the internal space of the limiting cylinder 23 and the internal space of the telescopic rod 272 is vertically opened on the telescopic rod 272, and the connecting hole 275 is connected to the through hole 26. A fixed pulley 276 for moving the auxiliary connecting rope 277 is fixedly connected to one side of the blocking block 274. A connecting rope 277 for limiting the adjusting cylinder 24 is provided in the telescopic rod 272. One end of the connecting rope 277 is fixedly connected to the inner wall of the telescopic rod 272, and the other end of the connecting rope 277 horizontally penetrates the blocking block 274; one end of the connecting rope 277 horizontally penetrates the blocking block 274, passes through the fixed pulley 276, the connecting hole 275 and the through hole 26, and is fixedly connected to the inner wall of the adjusting cylinder 24, and the connecting rope 277 is located on the inner side of the second elastic member 273.

[0052] It should be noted that: Fig.12 and Fig.13 As shown, since one end of the connecting rope 277 is fixedly connected to the inner wall of the telescopic rod 272, and the other end of the connecting rope 277 is fixedly connected to the inner wall of the adjusting cylinder 24, and since the elastic coefficient of the second elastic member 273 is greater than the elastic coefficient of the torsion spring, when the second elastic member 273 pushes the output end of the telescopic rod 272 to drive the second slider 271 to be located in the docking groove 25 away from one end of the bearing plate 21, the connecting rope 277 pulls the adjusting cylinder 24 to rotate through the torsion spring, so that the torsion spring is stretched under force, that is, when not docked, the second elastic member 273 is in a slightly compressed state, and the torsion spring is in a stretched state under force.

[0053] Embodiment 1: Figure 1-Figure 13 As shown, in this embodiment, when the circuit needs to be connected, the connector 1 is moved toward the connecting seat 2, so that the docking block 14 is fitted with the second slider 271, and the second slider 271 is pushed by the docking block 14 to move along the docking groove 25 toward the supporting plate 21, so that the docking block 14 enters the docking groove 25, so that the connector 1 and the connecting seat 2 are preliminarily docked, and when the second slider 271 is fitted with the docking block 14, the first tooth block 28 is meshed with the second tooth block 136.

[0054] When the docking block 14 pushes the second slider 271 to move along the docking groove 25 toward the bearing plate 21, the thrust exerted on the second slider 271 is transmitted to the second elastic member 273 by the telescopic rod 272, so that the second elastic member 273 is compressed. Since the adjusting cylinder 24 is connected to the bearing plate 21 by a torsion spring, and the torsion spring is in a stretched state when not docked, as the second elastic member 273 is compressed, the torsion spring drives the adjusting cylinder 24 to rotate while the length of the connecting rope 277 remains unchanged. The adjusting cylinder 24 drives the adjusting ring 135 to rotate through the first tooth block 28 and the second tooth block 136. The adjusting ring 135 drives the protective plate 133 to rotate around the connecting shaft 134 through the connecting rod 139, thereby gradually opening the protective plate 133 and exposing the plug 19, so as to facilitate the connection between the plug 19 and the socket 22.

[0055] It should be noted that when the plug 19 is exposed, the torsion spring is in a natural state. When the output end of the telescopic rod 272 is fully retracted, the protective plate 133 is fully opened, and the third connecting ring is pushed at this time, so that the third connecting ring drives the socket 22 to connect with the plug 19 step by step. In the process of gradually connecting the socket 22 with the plug 19, the socket 22 applies pressure to the adjustment plate 110, so that the first elastic member 18 is compressed, thereby driving the adjustment plate 110 and the first slider 17 to move along the receiving groove 15 toward the receiving hole 16.

[0056] When the first elastic member 18 is completely compressed back into the receiving hole 16, the plug 19 is connected to the socket 22. At this time, the connector 1 and the connection seat 2 are released, and the second elastic member 273 is relieved of force, thereby driving the adjustment cylinder 24 to reset, so that the adjustment cylinder 24 drives the protective plate 133 to reset through the adjustment ring 135 and the connecting rod 139, so that one end of the protective plate 133 enters the horizontally opened clamping groove on the outer wall of the socket 22, and then the protective plate 133 clamps the socket 22, completing the fixed connection between the connector 1 and the connection seat 2. When the circuit connection needs to be released, the adjustment cylinder 24 is first rotated to reduce the force on the torsion spring and increase the force on the second elastic member 273, so that the adjustment cylinder 24 drives the adjustment ring 135 to rotate through the first tooth block 28 and the second tooth block 136, and then the adjustment ring 135 drives the protective plate 133 to open through the connecting rod 139. When the adjustment cylinder 24 cannot rotate, the third connecting ring is pulled, so that the third connecting ring drives the socket 22 to reset.

[0057] During the process of disconnecting the plug 19 from the socket 22, the pressure on the first elastic member 18 becomes smaller and smaller as the socket 22 moves, thereby driving the adjustment plate 110 to rise along the accommodating groove 15, so that the adjustment plate 110 can smooth and correct the plug 19, thereby avoiding the situation where the plug 19 is bent due to shaking during the process of disconnecting the plug 19 from the socket 22.

[0058] When the plug 19 is disconnected from the socket 22, the adjusting cylinder 24 is loosened to release the pressure on the second elastic member 273. Since the elastic coefficient of the second elastic member 273 is greater than the elastic coefficient of the torsion spring, the second elastic member 273 pushes the output end of the telescopic rod 272 to extend, thereby driving the second slider 271 and the docking block 14 away from the bearing plate 21 along the docking groove 25, so that the torsion spring is stretched, thereby driving the adjusting cylinder 24 to rotate, so that the adjusting cylinder 24 is reset, and the adjusting cylinder 24 drives the protective plate 133 to reset through the first tooth block 28, the second tooth block 136, the adjusting ring 135 and the connecting rod 139.

[0059] When the telescopic rod 272 completely pushes the docking block 14 out of the docking groove 25, the adjusting cylinder 24 drives the adjusting ring 135 to complete the reset through the first tooth block 28 and the second tooth block 136, thereby protecting the plug 19, preventing the plug 19 from being exposed to the outside, and reducing the probability of the plug 19 being contaminated with dust, rainwater and other substances, thereby causing the circuit docking failure.

[0060] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A self-locking guide rail floating electrical connector, comprising: A connecting head (1) and a connecting seat (2) arranged on one side of the connecting head (1), characterized in that the connecting head (1) comprises a docking tube (11) and a bearing tube (12), an adjustment component (13) is arranged between the docking tube (11) and the bearing tube (12), the docking tube (11) and the bearing tube (12) are fixedly connected via the adjustment component (13), a docking block (14) is symmetrically fixedly connected to the docking tube (11), a receiving groove (15) is symmetrically horizontally opened on the inner wall of the bearing tube (12), and a receiving hole (15) is horizontally opened on the inner wall of the receiving groove (15) 16), a first slider (17) is arranged in the receiving groove (15), a first elastic member (18) is arranged in the receiving hole (16), one end of the first elastic member (18) is fixedly connected to the inner wall of the receiving hole (16), and the other end of the first elastic member (18) is fixedly connected to the first slider (17), a plug (19) is arranged in the bearing tube (12), one end of the plug (19) is fixedly connected to the inner wall of the bearing tube (12), an adjustment plate (110) is slidably connected to the plug (19), and the adjustment plate (110) is fixedly connected to the first slider (17); The connecting seat (2) comprises a bearing plate (21), one side of which is provided with a socket (22), a limiting cylinder (23) and an adjusting cylinder (24), one end of the limiting cylinder (23) is fixedly connected to the bearing plate (21), the adjusting cylinder (24) is connected to the bearing plate (21) via a torsion spring, the limiting cylinder (23) is located inside the adjusting cylinder (24), the socket (22) is located inside the limiting cylinder (23), a docking groove (25) is horizontally symmetrically provided on the inner wall of the limiting cylinder (23), a through hole (26) is symmetrically vertically provided on the limiting cylinder (23), the through hole (26) is communicated with the docking groove (25), a connecting assembly (27) is provided in the docking groove (25), and a plurality of first tooth blocks (28) are fixedly connected to the inner wall of the adjusting cylinder (24); The adjustment assembly (13) comprises a first connecting ring (131) and a second connecting ring (132), wherein the first connecting ring (131) is fixedly connected to the docking tube (11), and the second connecting ring (132) is fixedly connected to the bearing tube (12), and a plurality of protective plates (133) are arranged between the first connecting ring (131) and the second connecting ring (132); A connecting shaft (134) is horizontally penetrated on the protection plate (133), and two ends of the connecting shaft (134) respectively horizontally penetrate the first connecting ring (131) and the second connecting ring (132), and the connecting shaft (134) is connected to the protection plate (133), the first connecting ring (131) and the second connecting ring (132) through bearings; An adjustment ring (135) is arranged outside the first connection ring (131) and the second connection ring (132), a plurality of second tooth blocks (136) are fixedly connected to the adjustment ring (135), and first connection grooves (137) are horizontally opened on both sides of the adjustment ring (135); The first connecting ring (131) and the second connecting ring (132) are both horizontally provided with a second connecting groove (138); a connecting rod (139) is provided inside the adjusting ring (135); one end of the connecting rod (139) is located in the first connecting groove (137), and the other end of the connecting rod (139) is located in the second connecting groove (138); A first limiting shaft (1310) and a second limiting shaft (1311) are respectively and horizontally penetrated at both ends of the connecting rod (139); the first limiting shaft (1310) is connected to the connecting rod (139) via a bearing; the first limiting shaft (1310) is fixedly connected to the adjusting ring (135); the second limiting shaft (1311) horizontally penetrates the protective plate (133); and the second limiting shaft (1311) is connected to the protective plate (133) via a bearing; The connecting assembly (27) comprises a second slider (271) and a telescopic rod (272) located in the docking groove (25); one end of the telescopic rod (272) is fixedly connected to the second slider (271), and the other end of the telescopic rod (272) is fixedly connected to the bearing plate (21); The telescopic rod (272) is hollow, and a second elastic member (273) and a blocking block (274) are arranged inside the telescopic rod (272); one end of the second elastic member (273) is fixedly connected to the inner wall of the telescopic rod (272), and the other end of the second elastic member (273) is fixedly connected to the blocking block (274); and the blocking block (274) is fixedly connected to the inner wall of the telescopic rod (272); A connecting hole (275) is vertically provided on the telescopic rod (272), the connecting hole (275) is communicated with the through hole (26), a fixed pulley (276) is fixedly connected to one side of the blocking block (274), a connecting rope (277) is provided inside the telescopic rod (272), one end of the connecting rope (277) is fixedly connected to the inner wall of the telescopic rod (272), and the other end of the connecting rope (277) horizontally passes through the blocking block (274); One end of the connecting rope (277) horizontally passes through the blocking block (274), passes through the fixed pulley (276), the connecting hole (275) and the through hole (26), and is fixedly connected to the inner wall of the adjusting cylinder (24). The connecting rope (277) is located on the inner side of the second elastic member (273).

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