Connecting structure of corbel and guaranteed object suspension

Abstract

The invention provides a supporting arm and guaranteed object suspension connecting structure. The supporting arm and guaranteed object suspension connecting structure comprises a first clamping seat capable of being fixedly arranged on a supporting arm in a sleeving mode, a second clamping seat capable of being fixedly arranged on a rescued vehicle suspension in a sleeving mode and a tightening piece. The tightening piece is provided with two traction parts which can stretch out in opposite directions, the two traction parts are connected with the first clamping base and the second clamping base respectively, and the tightening piece can drag the first clamping base and the second clamping base at the same time through the two traction parts. The supporting arm and guaranteed object suspension connecting structure can effectively avoid abrasion to the bracket and a rescued vehicle suspension, is convenient to install and tighten, and is high in practicability.

Description

Technical Field

[0001] The invention belongs to the technical field of rescue and protection, and in particular relates to a suspension connection structure between a support arm and a protected object. Background Art

[0002] When a vehicle cannot run normally due to a breakdown or accident, a rescue vehicle is usually needed to rescue the breakdown or accident vehicle (the protected object). The rescue trailer can tow the rescued vehicle to ensure that the rescued vehicle is towed to the repair site. The rescued vehicle needs to be placed on the support arm of the rescue vehicle. At this time, after fixing the wheels of the rescued vehicle, the support arm needs to be connected to the suspension of the protected object through a tying structure.

[0003] In the prior art, a ring-shaped lashing chain is usually used for the lashing structure. A locking piece is provided at one end of the ring-shaped lashing chain, and the other end of the ring-shaped chain is detachably connected to the locking piece after passing through the supporting arm and the suspension of the rescued vehicle in turn, that is, the ring-shaped lashing chain is sleeved on the supporting arm and the suspension of the rescued vehicle. This structure is not convenient for tightening, and in the process of tightening the chain, the chain slides, which will form sliding friction with the supporting arm and the suspension of the rescued vehicle, causing wear of the supporting arm and the suspension of the rescued vehicle, and poor practicality. Moreover, this structure is not convenient for storage as a standard configuration of rescue vehicles. Summary of the invention

[0004] The embodiment of the present invention provides a suspension connection structure between a support arm and a secured object, aiming to solve the problem of poor practicality of the ring-shaped lashing chain used in the existing rescue trailer.

[0005] To achieve the above object, the technical solution adopted by the present invention is: to provide a suspension connection structure between a support arm and a protected object, comprising: The first clamping seat is used to be fixedly mounted on the supporting arm; The second clamping seat is used to fix the sleeve on the suspension of the rescued vehicle; The tightening member has two traction parts that can extend in opposite directions to each other, the two traction parts are respectively connected to the first clamping seat and the second clamping seat, and the tightening member is used to simultaneously pull the first clamping seat and the second clamping seat through the two traction parts.

[0006] In a possible implementation, the first card seat and the second card seat each have a card slot with an open end; a hanging ring for connecting the traction part is provided on one side of the first card seat and the second card seat located at the opening.

[0007] In a possible implementation, the tightening member includes: There are two external fixing plates, which are arranged in parallel and at intervals; A rotating shaft is arranged along the spacing direction of the two outer fixing plates, and two ends of the rotating shaft are rotatably connected to the two outer fixing plates; There are two guide posts, the two guide posts are arranged in a ring-shaped manner around the axis of the rotating shaft, and each guide post is arranged parallel to the rotating shaft; the two ends of the guide post are respectively fixedly connected to the two outer fixing plates; A reel is located between the two outer fixing plates and is coaxially arranged on the rotating shaft; the reel has an annular winding cavity; A first cable is wound in the annular winding cavity, a free end of the first cable is connected to the first clamping seat after passing through one of the guide pillars; the first cable is one of the traction parts; A second cable is wound in the annular winding cavity, and a free end of the second cable is connected to the second clamping seat after passing through another guide column; the second cable is another traction part; Self-locking component, used to lock the reel in one direction.

[0008] In a possible implementation, both ends of the rotating shaft extend out of the outer fixing plate, and each extended end of the rotating shaft is provided with a prism portion that can be clamped by a wrench.

[0009] In a possible implementation, two first cables are provided, the two first cables are spaced apart along the length direction of the rotating shaft, and the two first cables are both located in the middle of the annular winding cavity; Two second cables are provided, and the two second cables are respectively arranged on both sides of the two first cables along the length direction of the rotating shaft, and are both wound in the annular winding cavity.

[0010] In one possible implementation, a first guide body is provided on the guide column corresponding to the two first cables, and the first guide body is used to limit the two first cables in the axial direction of the rotating shaft; a second guide body is provided on the guide column corresponding to the two second cables, and the second guide body is used to limit the two second cables in the axial direction of the rotating shaft.

[0011] In a possible implementation, the self-locking component includes: Two fixed ratchet rings are provided, the two fixed ratchet rings are respectively arranged at two ends of the reel and are coaxially connected to the reel, and each fixed ratchet ring is provided with a first unidirectional sawtooth on an annular plane away from the reel; Two sliding ratchet rings are provided, and the two sliding ratchet rings are respectively arranged on both sides of the reel and correspond to the two fixed ratchet rings one by one; each sliding ratchet ring is slidably connected to a sliding column fixed on the outer fixed plate; each sliding ratchet ring is provided with a second one-way sawtooth on an annular surface facing the corresponding fixed ratchet ring, and the second one-way sawtooth can mesh with the first one-way sawtooth; There are two springs, which are respectively arranged on both sides of the reel and are both sleeved on the rotating shaft. One end of each spring abuts against the outer fixed plate, and the other end abuts against the corresponding sliding ratchet ring, so as to bounce the sliding ratchet ring so that the sliding ratchet ring maintains a tendency to continuously move toward the corresponding fixed ratchet ring.

[0012] In a possible implementation, the self-locking component further includes: There are two inner fixing plates, which are respectively located on both sides of the reel and fixedly connected to the two guide posts; each inner fixing plate has a through hole which is colinear with the rotating shaft and for the corresponding sliding ratchet ring to pass through; There are two rotating drums, and the two rotating drums correspond to the two inner fixed plates respectively; one end of each rotating drum is threadedly connected to the corresponding through hole; each rotating drum has a drum cavity, and a limiting ring is fixed at one end of the drum cavity close to the winding drum; Wherein, the sliding ratchet ring is provided with an outer extension ring corresponding to the limiting ring, and the outer extension ring is used to be pushed by the limiting ring when the rotating drum moves away from the winding drum.

[0013] In a possible implementation, a prism is provided on the outer edge of the rotary drum; The self-locking component also includes an adjustable wrench, which has two locking openings that can correspond to the two prisms one by one respectively.

[0014] In this implementation, the first clamping seat can be fixedly mounted on the bracket, and the second clamping seat can be fixedly mounted on the suspension of the rescued vehicle, and the first clamping seat and the second clamping seat are connected by a tightening member, and the tightening member can tighten the two. This structure can effectively avoid wear on the bracket and the suspension of the rescued vehicle, and is convenient for installation and tightening work, and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the use structure of the suspension connection structure between the support arm and the protected object provided in the embodiment of the present invention; Figure 2A schematic diagram of the structure of the suspension connection structure between the support arm and the protected object provided in an embodiment of the present invention (the first cable, the second cable, the first clamping seat and the second clamping seat are hidden); Figure 3 A schematic diagram of the main structure of the suspension connection structure between the support arm and the protected object provided in an embodiment of the present invention; Figure 4 for Figure 1 Schematic diagram of the main structure of the suspension connection structure between the support arm and the protected object provided in the embodiment Figure 2 (One set of fixed plates and rotating drum is hidden); Figure 5 for Figure 1 Schematic diagram of the main structure of the suspension connection structure between the support arm and the protected object provided in the embodiment Figure 3 (The fixed plate and rotating drum are cross-sectional views); Figure 6 A schematic diagram of the adjustable wrench structure of the suspension connection structure between the support arm and the protected object provided in an embodiment of the present invention.

[0016] Description of reference numerals: 10. First booth; 20. Second booth; 30. tightening member; 31. outer fixing plate; 32. rotating shaft; 321. prism portion; 33. guide column; 331. first guide body; 332. second guide body; 34. reel; 35. first cable; 36. second cable; 37. self-locking member; 371. fixed ratchet ring; 372. sliding ratchet ring; 373. spring; 374. inner fixing plate; 375. rotating cylinder; 376. limiting ring; 377. outer extension ring; 38. sliding column; 40. Support arm; 50. Rescued vehicles; 60. Adjustable wrench; 61. Handle; 62. Extendable arm; 63. Locking opening. DETAILED DESCRIPTION

[0017] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0018] Please also read Figure 1 and Figure 2, the supporting arm 40 and the suspension connection structure of the protected object provided by the present invention are now described. The supporting arm 40 and the suspension connection structure of the protected object include a first clamping seat 10 that can be fixedly mounted on the supporting arm 40, a second clamping seat 20 that can be fixedly mounted on the suspension of the rescued vehicle 50, and a tightening member 30. The tightening member 30 has two traction parts that can extend in opposite directions to each other, and the two traction parts are respectively connected to the first clamping seat 10 and the second clamping seat 20. The tightening member 30 can simultaneously pull the first clamping seat 10 and the second clamping seat 20 through the two traction parts.

[0019] Compared with the prior art, the connecting structure between the support arm 40 and the suspension of the rescued object provided in this embodiment is that the first clamping seat 10 can be fixedly mounted on the support arm 40, and the second clamping seat 20 can be fixedly mounted on the suspension of the rescued vehicle 50, and the first clamping seat 10 and the second clamping seat 20 are connected through the tightening member 30, and the tightening member 30 can tighten the two. This structure can effectively avoid wear on the support and the suspension of the rescued vehicle 50, and is convenient for installation and tightening work, and has strong practicality.

[0020] In some embodiments, the first card holder 10 and the second card holder 20 can be used as follows: Figure 2 See the structure shown. Figure 2 The first card seat 10 and the second card seat 20 both have a card opening with one end being open. The first card seat 10 and the second card seat 20 are provided with a hanging ring for connecting the traction part on one side of the opening.

[0021] The first card holder 10 and the second card holder 20 can adopt the same structure, but their sizes need to be adapted according to the actual sleeve position. That is, the first card holder 10 and the second card holder 20 are both U-shaped structures, and the hanging rings provided therein can ensure the detachable and convenient connection of the traction part.

[0022] The first clamping seat 10 and the second clamping seat 20 can be made of high-strength metal material, which is easy to install and can prevent slippage with the support arm 40 or the suspension of the rescued vehicle 50 during the tensioning process, thereby avoiding wear.

[0023] In some embodiments, the tightening member 30 may be Figures 2 to 3 See the structure shown. Figures 2 to 3 The tightening member 30 includes an outer fixing plate 31 , a rotating shaft 32 , a guide column 33 , a reel 34 , a first cable 35 , a second cable 36 and a self-locking component 37 .

[0024] There are two outer fixing plates 31, which are arranged in parallel and at intervals. The rotating shaft 32 is arranged along the spacing direction of the two outer fixing plates 31, and the two ends are rotatably connected to the two outer fixing plates 31. There are two guide posts 33, which are arranged in an annular interval around the axis of the rotating shaft 32, and each guide post 33 is arranged in parallel with the rotating shaft 32. The two ends of the guide posts 33 are fixedly connected to the two outer fixing plates 31 respectively. The reel 34 is located between the two outer fixing plates 31 and is coaxially arranged on the rotating shaft 32. The reel 34 has an annular winding cavity. The first cable 35 is wound in the annular winding cavity, and the free end of the first cable 35 is connected to the first clamping seat 10 after passing through one of the guide posts 33. The first cable 35 is one of the traction parts. The second cable 36 is wound in the annular winding cavity, and the free end of the second cable 36 is connected to the second clamping seat 20 after passing through another guide post 33. The second cable 36 is another traction part. The self-locking component 37 can lock the reel 34 in one direction.

[0025] The combined frame formed by the outer fixing plate 31 and the two guide posts 33 can ensure the stable connection of the rotating shaft 32, and can also ensure the stable rotation of the drum 34. The first cable 35 and the second cable 36 are both wound around the drum 34, and are connected to the first clamping seat 10 and the second clamping seat 20 through the guidance of the two guide posts 33, which can ensure that after the drum 34 rotates, the first cable 35 and the second cable 36 are tightened at the same time. After the first rotating shaft 32 rotates, it can drive the first cable 35 and the second cable 36 to be tightened, and the drum 34 can be fixed by the self-locking component 37 to prevent the drum 34 from rotating in the opposite direction relative to the outer fixing plate 31, thereby ensuring the tension of the first cable 35 and the second cable 36.

[0026] This structure can effectively avoid sliding friction with the support arm 40 and the suspension of the rescued vehicle 50 during the tightening process, thereby avoiding wear of the support arm 40 and the suspension of the rescued vehicle 50, and is highly practical. At the same time, when idle, the first cable 35 and the second cable 36 can be retracted into the drum 34 for easy storage and easy access.

[0027] In some embodiments, the rotating shaft 32 may be Figure 2 See the structure shown. Figure 2 Both ends of the rotating shaft 32 extend out of the outer fixing plate 31, and each extending end of the rotating shaft 32 is provided with a prism portion 321 for a wrench to clamp. This structure can ensure that the wrench is convenient to act on the rotating shaft 32, and at the same time can provide two driving points of the rotating shaft 32, thereby improving the flexibility of locking.

[0028] In some embodiments, the first cable 35 and the second cable 36 may be formed as follows: Figure 3 See the structure shown. Figure 3There are two first cables 35, which are arranged at intervals along the length direction of the rotating shaft 32, and the two first cables 35 are both located in the middle of the annular winding cavity. There are two second cables 36, which are respectively arranged on both sides of the two first cables 35 along the length direction of the rotating shaft 32, and are both wound in the annular winding cavity.

[0029] The arrangement of the two first cables 35 and the two second cables 36 can improve the traction force, thereby being able to adapt to the rescued vehicle 50 of large tonnage. At the same time, the two first cables 35 are on the inner side, and the two second cables 36 are on the outer side, which can ensure that the combination of the outer fixing plate 31, the guide column 33, the drum 34 and the rotating shaft 32 is evenly stressed, thereby ensuring its stable operation.

[0030] The ends of each first traction rope and each second traction rope can be connected to a hook to be connected to a hanging ring provided on the first card seat 10 and the second card seat 20 .

[0031] In some embodiments, the guide column 33 may be Figures 2 to 3 See the structure shown. Figures 2 to 3 A first guide body 331 is provided on the guide column 33 corresponding to the two first cables 35, and the first guide body 331 can limit the two first cables 35 in the axial direction of the rotating shaft 32. A second guide body 332 is provided on the guide column 33 corresponding to the two second cables 36, and the second guide body 332 can limit the two second cables 36 in the axial direction of the rotating shaft 32.

[0032] The first guide body 331 can organize the two first cables 35, and the second guide body 332 can ensure the organization of the two second cables 36, so as to avoid the first cables 35 and the second cables 36 from being entangled during the winding process, thereby ensuring the stability of their operation.

[0033] In some embodiments, the self-locking component 37 can be used as follows: Figure 2 , Figure 3 and Figure 5 See the structure shown. Figure 2 , Figure 3 and Figure 5 The self-locking component 37 includes a fixed ratchet ring 371 , a sliding ratchet ring 372 and a spring 373 .

[0034] There are two fixed ratchet rings 371, which are respectively arranged at the two ends of the reel 34 and are coaxially connected to the reel 34. A first one-way sawtooth is provided in an annular plane of each fixed ratchet ring 371 away from the reel 34. There are two sliding ratchet rings 372, which are respectively arranged on both sides of the reel 34 and correspond to the two fixed ratchet rings 371 one by one. Each sliding ratchet ring 372 is slidably connected to the sliding column 38 fixed on the outer fixing plate 31. A second one-way sawtooth is provided in an annular surface of each sliding ratchet ring 372 facing the corresponding fixed ratchet ring 371, and the second one-way sawtooth can mesh with the first one-way sawtooth. There are two springs 373, which are respectively arranged on both sides of the reel 34 and are both sleeved on the rotating shaft 32. One end of each spring 373 abuts against the outer fixed plate 31, and the other end abuts against the corresponding sliding ratchet ring 372, which can bounce the sliding ratchet ring 372 so that the sliding ratchet ring 372 maintains a tendency to continue moving toward the corresponding fixed ratchet ring 371.

[0035] When the sliding ratchet ring 372 is meshed with the fixed ratchet ring 371, as the reel 34 drives the fixed ratchet ring 371 to rotate, the first one-way sawtooth drives the second one-way sawtooth, and at the same time, through the spring 373, the sliding ratchet ring 372 moves back and forth in the axial direction of the rotating shaft 32, that is, the sliding ratchet ring 372 can maintain meshing with the fixed ratchet ring 371. When the reel 34 is forced to rotate in the reverse direction, the sliding ratchet ring 372 will limit the fixed ratchet ring 371 in one direction, forming a one-way self-locking. The ratchet ring structure can increase the self-locking force.

[0036] In this embodiment, the sliding ratchet ring 372 is sleeved on the rotating shaft 32, and there may be multiple sliding columns 38 arranged on the outer fixing plate 31. Each sliding column 38 may be arranged in a ring-shaped interval along the axial direction of the rotating shaft 32, and the extension amount of each sliding column 38 is smaller than the distance from the outer fixing plate 31 to the corresponding fixed ratchet ring 371.

[0037] In some embodiments, the self-locking component 37 can be used as follows: Figure 3 and Figure 5 See the structure shown. Figure 3 and Figure 5 The self-locking component 37 also includes an inner fixing plate 374 and a rotating cylinder 375 .

[0038] There are two inner fixing plates 374, which are respectively located on both sides of the reel 34 and fixedly connected to the two guide posts 33. Each inner fixing plate 374 has a through hole that is colinear with the rotating shaft 32 and for the corresponding sliding ratchet ring 372 to pass through. There are two rotating cylinders 375, which correspond to the two inner fixing plates 374 one by one. One end of each rotating cylinder 375 is threadedly connected to the corresponding through hole. Each rotating cylinder 375 has a cylinder cavity, and a stop ring 376 is fixedly provided at one end of the cylinder cavity close to the reel 34.

[0039] The sliding ratchet ring 372 is provided with an outer extension ring 377 corresponding to the limiting ring 376 . The outer extension ring 377 can be pushed by the limiting ring 376 when the rotating drum 375 moves away from the winding drum 34 .

[0040] The inner fixing plate 374 can support the rotating shaft 32 and the two guide rods together with the outer fixing plate 31, which can increase the structural strength. The inner fixing plate 374 is threadedly connected to the rotating cylinder 375 through its through hole. During the rotation of the rotating cylinder 375, the rotating cylinder 375 will move horizontally in the axial direction of the rotating shaft 32. In addition, during the movement of the two rotating cylinders 375 in opposite directions, the limiting ring 376 in the cylinder cavity can push the outer extension ring 377 on the two sliding ratchet rings 372 to move outward, thereby breaking away from the one-way limiting of the two fixed ratchet rings. This structure is easy to disassemble and simple to operate.

[0041] Moreover, the rotary cylinder 375 is sleeved on the outside of the fixed ratchet ring and the sliding ratchet ring base spring 373 to prevent dust from entering the interior and thus ensure the stability of the one-way limit. In addition, one end of the rotary cylinder 375 can be slidably connected to the sliding hole arranged on the outer fixing plate 31 to ensure comprehensive protection.

[0042] In this embodiment, when the two rotating drums 375 move relative to each other, one end of the rotating drum 375 will abut against the end of the winding drum 34, which can ensure that damping is formed with the winding drum 34, thereby ensuring that during the storage process, the free ends of the first cable 35 and the second cable 36 are prevented from entering the annular winding cavity due to accidental contact, thereby further ensuring the storage effect.

[0043] In some embodiments, the rotary drum 375 may be Figure 3 , Figure 5 and Figure 6 See the structure shown. Figure 3 , Figure 5 and Figure 6 The outer edge of the rotary cylinder 375 is provided with a prism. The self-locking component 37 further includes an adjustable wrench 60, and the adjustable wrench 60 has two clamping openings 63 that can correspond to the two prisms one by one.

[0044] The movable wrench 60 can secure the handle 61, which is arranged parallel to the rotating shaft 32. Extension arms 62 are respectively arranged at both ends of the handle 61, and the extension arms 62 and the handle 61 are arranged vertically. The end of each extension arm 62 has a clamping opening 63, which can be adapted to the prism portion 321, and the specific prism can be hexagonal.

[0045] It should be noted that the internal threads of the two through holes are arranged in opposite directions to ensure that when the adjustable wrench 60 rotates in one direction, the two rotating cylinders 375 move relative to each other or move away from each other.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The supporting arm and the suspension connection structure of the protected object are characterized by: include: The first clamping seat is used to be fixedly mounted on the supporting arm; The second clamping seat is used to fix the sleeve on the suspension of the rescued vehicle; The tightening member has two traction parts that can extend in opposite directions to each other, the two traction parts are respectively connected to the first clamping seat and the second clamping seat, and the tightening member is used to simultaneously pull the first clamping seat and the second clamping seat through the two traction parts.

2. The support arm and the protected object suspension connection structure according to claim 1, characterized in that: The first card seat and the second card seat both have a card opening with an open end; a hanging ring for connecting the traction part is provided on one side of the first card seat and the second card seat located at the opening.

3. The support arm and the protected object suspension connection structure according to any one of claims 1 to 2, characterized in that: The tightening member comprises: There are two external fixing plates, which are arranged in parallel and at intervals; A rotating shaft is arranged along the spacing direction of the two outer fixing plates, and two ends of the rotating shaft are rotatably connected to the two outer fixing plates; There are two guide posts, the two guide posts are arranged in a ring-shaped manner around the axis of the rotating shaft, and each guide post is arranged parallel to the rotating shaft; the two ends of the guide post are respectively fixedly connected to the two outer fixing plates; A reel is located between the two outer fixing plates and is coaxially arranged on the rotating shaft; the reel has an annular winding cavity; A first cable is wound in the annular winding cavity, a free end of the first cable is connected to the first clamping seat after passing through one of the guide pillars; the first cable is one of the traction parts; A second cable is wound in the annular winding cavity, and a free end of the second cable is connected to the second clamping seat after passing through another guide column; the second cable is another traction part; Self-locking component, used to lock the reel in one direction.

4. The support arm and the protected object suspension connection structure according to claim 3, characterized in that: Both ends of the rotating shaft extend out of the outer fixing plate, and each extended end of the rotating shaft is provided with a prism portion that can be clamped by a wrench.

5. The support arm and the protected object suspension connection structure according to claim 3, characterized in that: There are two first cables, which are spaced apart along the length direction of the rotating shaft, and are both located in the middle of the annular winding cavity; Two second cables are provided, and the two second cables are respectively arranged on both sides of the two first cables along the length direction of the rotating shaft, and are both wound in the annular winding cavity.

6. The supporting arm and the protected object suspension connection structure according to claim 5, characterized in that: A first guide body is provided on the guide column corresponding to the two first cables, and the first guide body is used to limit the two first cables in the axial direction of the rotating shaft; a second guide body is provided on the guide column corresponding to the two second cables, and the second guide body is used to limit the two second cables in the axial direction of the rotating shaft.

7. The support arm and the protected object suspension connection structure according to claim 3, characterized in that: The self-locking component comprises: Two fixed ratchet rings are provided, the two fixed ratchet rings are respectively arranged at two ends of the reel and are coaxially connected to the reel, and each fixed ratchet ring is provided with a first unidirectional sawtooth on an annular plane away from the reel; Two sliding ratchet rings are provided, and the two sliding ratchet rings are respectively arranged on both sides of the reel and correspond to the two fixed ratchet rings one by one; each sliding ratchet ring is slidably connected to a sliding column fixed on the outer fixed plate; each sliding ratchet ring is provided with a second one-way sawtooth on an annular surface facing the corresponding fixed ratchet ring, and the second one-way sawtooth can mesh with the first one-way sawtooth; There are two springs, which are respectively arranged on both sides of the reel and are both sleeved on the rotating shaft. One end of each spring abuts against the outer fixed plate, and the other end abuts against the corresponding sliding ratchet ring, so as to bounce the sliding ratchet ring so that the sliding ratchet ring maintains a tendency to continuously move toward the corresponding fixed ratchet ring.

8. The support arm and the protected object suspension connection structure according to claim 7, characterized in that: The self-locking component also includes: There are two inner fixing plates, which are respectively located on both sides of the reel and fixedly connected to the two guide posts; each inner fixing plate has a through hole which is colinear with the rotating shaft and for the corresponding sliding ratchet ring to pass through; There are two rotating drums, and the two rotating drums correspond to the two inner fixed plates respectively; one end of each rotating drum is threadedly connected to the corresponding through hole; each rotating drum has a drum cavity, and a limiting ring is fixed at one end of the drum cavity close to the winding drum; Wherein, the sliding ratchet ring is provided with an outer extension ring corresponding to the limiting ring, and the outer extension ring is used to be pushed by the limiting ring when the rotating drum moves away from the winding drum.

9. The support arm and the protected object suspension connection structure according to claim 8, characterized in that: The outer edge of the rotary drum is provided with a prism; The self-locking component also includes an adjustable wrench, which has two locking openings that can correspond to the two prisms one by one respectively.

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