Ratchet wheel anti-loosening structure

Abstract

The utility model relates to the field of connectors, and discloses a ratchet wheel anti-loose structure, which comprises a socket, a connecting pipe and a limit connecting block, the connecting pipe is arranged behind the socket, an external thread connecting wall is arranged at the rear end of the connecting pipe, and a plurality of groups of limit clamping grooves are arranged in an inner cavity of the external thread connecting wall. Limiting connecting blocks are arranged at the front ends of inner cavities of the limiting clamping grooves correspondingly, fixing cylinders are arranged behind the limiting connecting blocks, abutting rings are arranged behind the fixing cylinders, and static ratchet wheels are arranged behind the abutting rings. The sliding blocks are controlled to be embedded into the limiting clamping grooves through stretching of the springs, a matched connection structure of the socket assembly and the plug assembly is established, the sealing rubber ring is combined to enhance connection control over the fixed rubber sleeve shell, and the key groove is formed in the inner wall of the connecting ring to be matched with limiting installation of the movable ratchet wheel. The rotating connecting ring can control the movable ratchet wheel to be meshed with the tooth surface of the static ratchet wheel, combined connection of the anti-loosening device is completed, and the structural stability of the anti-loosening structure is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of connectors, and particularly to a ratchet anti-loosening structure. Background Art

[0002] Circular connector products usually set anti-loosening structures on the connector housing to resist the influence of external vibrations, impacts and other factors on their normal connection under harsh environmental conditions. The existing dynamic and static ratchet anti-loosening structures of circular connector products in the market have good wear resistance. However, the anti-loosening effect of the anti-loosening structure acting on the product in the actual application environment changes with the size of the connector housing of the same series of products. The axial limit of its anti-loosening structure usually adopts a plastic barb structure, which has the risk of breaking and coming off in harsh vibration and impact environments, resulting in the failure of the connector anti-loosening structure. It is difficult to control the anti-loosening effect of the product, and the protection performance of most anti-loosening structures is poor, making the anti-loosening structure vulnerable to environmental factors during use and affecting its service life. Therefore, a ratchet anti-loosening structure is proposed. Summary of the Utility Model

[0003] (1) Technical Problems to be Solved

[0004] To solve at least one aspect of the above problems, the utility model first provides a ratchet anti-loosening structure, which has a variety of interconnected connecting devices, so that the anti-loosening structure itself has a rigorous limiting structure to ensure its stable installation relationship; multiple groups of sealing and protection devices are set to enhance the protection effect on the anti-loosening structure and extend the service time of the anti-loosening structure.

[0005] (2) Technical Solutions

[0006] To solve the above technical problems, the utility model provides a ratchet anti-loosening structure, including a socket, a connecting pipe and a limiting connecting block. A connecting pipe is arranged behind the socket, an external thread connecting wall is arranged at the rear end of the connecting pipe, several groups of limiting card slots are arranged in the inner cavity of the external thread connecting wall, limiting connecting blocks are respectively arranged at the front ends of the inner cavities of the limiting card slots, a fixing cylinder is arranged behind the limiting connecting block, an abutting ring is arranged behind the fixing cylinder, a static ratchet is arranged behind the abutting ring, a dynamic ratchet is arranged at the outer front end of the static ratchet, a corrugated spring is arranged at the front end of the dynamic ratchet, and a first connecting plug is arranged in the center of the inner cavity of the static ratchet.

[0007] As a preferred scheme of the utility model, the limiting connecting block includes a clamping column, a sliding groove is arranged at the front end of the clamping column, a first sliding block is arranged on the left side of the inner cavity of the sliding groove, a second sliding block is arranged on the right side of the inner cavity of the sliding groove, and a strong spring is arranged between the first sliding block and the second sliding block.

[0008] As a preferred embodiment of the present utility model, the following is provided: on the wall plates of the limit card slots, stoppers are respectively provided, and the width of the front end of the limit card slot is set to be 2 mm greater than the width of the slot body at the rear end of the limit card slot between the two stoppers.

[0009] As a preferred embodiment of the present utility model, the following is provided: on the rear end face of the moving ratchet wheel, a number of connecting tooth surfaces one that are connected end to end are evenly provided. The connecting tooth surface one includes a steep contact inclined surface one, and at the other end of the steep contact inclined surface one, a gentle contact inclined surface one is provided.

[0010] As a preferred embodiment of the present utility model, the following is provided: on the front end face of the static ratchet wheel, a number of connecting tooth surfaces two that are connected end to end are evenly provided. The connecting tooth surface two includes a steep contact inclined surface two, and at the other end of the steep contact inclined surface two, a gentle contact inclined surface two is provided.

[0011] Furthermore, at the outer end of the connecting pipe, a fixed rubber sleeve is provided. At the rear end of the fixed rubber sleeve, a connecting ring is provided. On the inner wall of the fixed rubber sleeve, an internally threaded connecting wall is provided. At the rear end of the fixed rubber sleeve, a retaining ring is provided, and a number of fixing grooves one are evenly provided inside the retaining ring.

[0012] Furthermore, the internally threaded connecting wall and the externally threaded connecting wall are meshed with each other.

[0013] Furthermore, on the inner side of the wall plate of the connecting ring, a friction gasket is provided. Inside the friction gasket, a connecting ring is provided, and a number of key grooves are evenly provided on the connecting ring.

[0014] Furthermore, at the connection between the front end of the connecting pipe and the fixed rubber sleeve, an installation card slot is provided. Inside the installation card slot, a sealing rubber ring is provided, and a steel edge is provided on the surface of the sealing rubber ring.

[0015] Furthermore, a number of clamping keys are evenly provided at the outer end of the wall of the moving ratchet wheel, and the specifications of the clamping keys are adapted to the specifications of the inner cavity of the key grooves.

[0016] Furthermore, a fixing ring is provided inside the static ratchet wheel. Corresponding to the fixing grooves one, fixing grooves two are respectively provided, and fixing blocks are provided in the fixing grooves one and the fixing grooves two.

[0017] (III) Beneficial effects

[0018] 1. The anti-loosening structure provided by the utility model uses the spring expansion and contraction to control the slider to be embedded in the limit card slot, establishes the mating connection structure between the socket assembly and the plug assembly, and combines the sealing rubber ring to enhance the connection control of the connecting pipe to the fixed rubber sleeve. The rear end of the fixed rubber sleeve is connected to the fixed block through a retaining ring to prevent the plug assembly from overlapping and connecting with the socket excessively, ensuring the installation of the two sets of ratchets. The inner wall of the connecting ring is provided with a keyway to cooperate with the limit installation of the moving ratchet. Rotating the connecting ring can control the moving ratchet to establish tooth surface meshing with the static ratchet, completing the combined connection of the anti-loosening device. The connecting tooth surfaces of the static ratchet and the moving ratchet are both provided with a steep contact inclined surface and a gentle contact inclined surface, and the slopes of the two inclined surfaces are different, facilitating the control of the circumferential rotation force to make the moving ratchet mesh with the static ratchet. When the connecting ring is rotated in the reverse direction, the meshed inclined surface will not be rotated out of its original position, thus effectively ensuring the formation of a tight anti-loosening structure for the two sets of ratchets.

[0019] 2. The utility model sets the displacement of the sliding block controlled by a strong spring. When the sliding block is subjected to the pressure of the stop block, the spring can move relatively, enabling the limit connecting block to be inserted into the limit card slot. When the pressure of the stop block disappears, the strong spring quickly returns to its original position, pushing the two sliding blocks to move outwards and establishing a clamping relationship with the front end of the stop block, completing the clamping of the limit card slot to the limit connecting block, and assisting in completing the anti-loosening setting of the socket and the plug for the anti-loosening structure; setting the sealing rubber ring can effectively prevent the fixed rubber sleeve from loosening and play a sealing and protective effect on the anti-loosening structure. Setting the steel edge can effectively prevent the limit connecting block from deforming and extend the service life of the closed device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the structural schematic diagram of the anti-loosening structure based on ratchet connection of the utility model;

[0021] Figure 2 is the disassembled structural schematic of the anti-loosening structure based on ratchet connection of the utility model Figure 1 ;

[0022] Figure 3 is the disassembled structural schematic of the anti-loosening structure based on ratchet connection of the utility model Figure 2 ;

[0023] Figure 4 is the structural schematic diagram of the fixed rubber sleeve of the anti-loosening structure based on ratchet connection of the utility model;

[0024] Figure 5 is the schematic diagram of the positional relationship between the two sets of ratchets of the anti-loosening structure based on ratchet connection of the utility model;

[0025] Figure 6 is the schematic diagram of the meshing relationship between the tooth surfaces of the two sets of ratchets of the anti-loosening structure based on ratchet connection of the utility model;

[0026] Figure 7 Schematic installation structure diagram of the static ratchet wheel of the anti-loosening structure based on ratchet connection of the present utility model;

[0027] Figure 8 Schematic side connection structure diagram of the anti-loosening structure based on ratchet connection of the present utility model;

[0028] Figure 9 Schematic connection structure diagram of the limit clamping device of the anti-loosening structure based on ratchet connection of the present utility model;

[0029] Figure 10 Schematic position relationship diagram of the limit clamping device of the anti-loosening structure based on ratchet connection of the present utility model.

[0030] Explanation of reference numerals:

[0031] 1 is a socket, 2 is a connecting pipe, 3 is a sealing rubber ring, 4 is an external thread connecting wall, 5 is a limit card slot, 6 is a stop block, 7 is a fixed rubber sleeve housing, 71 is an internal thread connecting wall, 72 is a retaining ring, 73 is a first fixing groove, 8 is a connecting ring, 81 is a friction gasket, 82 is a connecting ring, 83 is a keyway, 9 is a fixed cylinder, 10 is a limit connecting block, 101 is a clamping post, 102 is a first sliding block, 103 is a second sliding block, 104 is a strong spring, 11 is an abutting ring, 12 is a corrugated spring, 13 is a moving ratchet wheel, 131 is a clamping key, 132 is a first steep contact slope, 133 is a first gentle contact slope, 14 is a static ratchet wheel, 141 is a fixing ring, 142 is a fixing block, 143 is a second steep contact slope, 144 is a second gentle contact slope, 15 is a first connecting plug. Detailed implementation manners

[0032] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following detailed description will be given to the specific embodiments of the present utility model with reference to the accompanying drawings.

[0033] Refer to Figures 1 - 10, an embodiment of the present utility model provides a ratchet anti-loosening structure, including a socket 1, a connecting pipe 2 and a limit connecting block 10. A connecting pipe 2 is provided behind the socket 1. An external thread connecting wall 4 is provided at the rear end of the connecting pipe 2. Several groups of limit card slots 5 are provided in the inner cavity of the external thread connecting wall 4. Limit connecting blocks 10 are respectively provided at the front ends of the inner cavities of the limit card slots 5. A fixed cylinder 9 is provided behind the limit connecting block 10. An abutting ring 11 is provided behind the fixed cylinder 9. A static ratchet 14 is provided behind the abutting ring 11. A moving ratchet 13 is provided at the outer front end of the static ratchet 14. A corrugated spring 12 is provided at the front end of the moving ratchet 13. A connecting plug one 15 is provided at the center of the inner cavity of the static ratchet 14. A connecting plug two is provided at the front end of the socket 1. This anti-loosening structure uses the socket 1 and the connecting plug two as the socket assembly of the connecting device, and cooperates with the connecting plug one 15 assembly to form a complete connecting anti-loosening structure. The device to be assembled is connected at the connecting plug one 15, and the fixing setting of the device is completed. Through this anti-loosening structure, the device to be assembled can be stably connected, the firmness of the device installation can be guaranteed, the loosening of the device installation structure can be avoided, and the normal operation of the corresponding device can be ensured.

[0034] Refer to Figure 2 and Figure 3 , the anti-loosening structure is provided with a connecting pipe 2 at the rear end of the socket 1, and an external thread connecting wall 4 is provided at the rear end of the pipe wall of the connecting pipe 2 to establish a stable connection between the outer pipe wall of the connecting pipe 2 and the fixed rubber sleeve shell 7. The inner cavity of the connecting pipe 2 fixes the setting of the limit connecting block 10 through the limit card slot 5, ensuring the limit control of the connecting pipe 2 over the fixed cylinder 9 and its components. The fixed cylinder 9 and its components are in contact with the rear end wall plate of the external thread connecting wall 4 through the abutting ring 11, further limiting the connection position of the fixed cylinder 9 and its components with the connecting pipe 2 and ensuring the structural stability of the connection between the two components. A static ratchet 14 is provided on the fixed cylinder 9 to cooperate with the moving ratchet 13 to be tightened and fixed, realizing the fixed control of the rear end of the connecting ring 8 and completing the stability setting of the entire anti-loosening structure. After the static ratchet 14 and the moving ratchet 13 are tightened, the anti-loosening structure enters a stable connection state and will not loosen in its complete structure state, ensuring the stable installation of the device to be assembled.

[0035] Under the action of the external installation force of the rotation of the connecting block 8, during the mutual rotation connection of the static ratchet 14 and the moving ratchet 13, the corrugated spring 12 is in a compressed state. After the static ratchet 14 and the moving ratchet 13 are stably connected, the external installation force is withdrawn, the external force received by the corrugated spring 12 disappears, the corrugated spring 12 expands outwards, and its front end contacts the retaining ring 72. Thus, the expansion force of the corrugated spring 12 continuously presses the connecting tooth surface one of the moving ratchet 13 into the connecting tooth surface two of the static ratchet 14, strengthening the connection firmness between the static ratchet 14 and the moving ratchet 13.

[0036] Refer to Figure 9 and Figure 10, the limit connection block 10 includes a clamping post 101. A sliding groove is provided at the front end of the clamping post 101. A first sliding block 102 is provided on the left side of the inner cavity of the sliding groove, and a second sliding block 103 is provided on the right side of the inner cavity of the sliding groove. A strong spring 104 is provided between the first sliding block 102 and the second sliding block 103. The limit connection block 10 is inserted into the limit card slot 5 to establish the connection between the fixed cylinder 9 and its components and the connecting pipe 2 components. The first sliding block 102 and the second sliding block 103 are arranged in the sliding groove through connecting columns. When the two sliding blocks are not connected to the limit card slot 5, the strong spring 104 is in a relaxed state. At this time, the distance between the rear edges of the two sliding blocks is the same as the width of the front slot body of the limit card slot 5. The distance between the front edges of the two sliding blocks is 1 mm narrower than the rear slot body of the limit card slot 5 between the two stoppers 6. When an external force pushes the limit connection block 10 into the limit card slot 5, under the extrusion of the two stoppers 6, the two sliding blocks compress the strong spring 104 and move relative to each other, so that the two sliding blocks can enter the rear slot body of the limit card slot 5. When the two sliding blocks completely enter the front slot body of the limit card slot 5, the extrusion force on the two sliding blocks disappears, and the strong spring 104 quickly returns to its original position, firmly clamping the two sliding blocks in the front slot body of the limit card slot 5, realizing the fixed connection of the connecting pipe 2 to the fixed cylinder 9 and its components.

[0037] Stoppers 6 are respectively provided on the wall plates of the limit card slot 5. The width of the front end of the limit card slot 5 is 2 mm larger than the width of the rear slot body of the limit card slot 5 between the two stoppers 6. By setting the stoppers 6 in the limit card slot 5, the extrusion of the two sliding blocks is realized, and the front edge structure of the stopper 6 is used to limit the rear edges of the two sliding blocks. A rubber pad is provided at the front end of the limit card slot 5, which can buffer the elastic impact when the sliding block is inserted.

[0038] Refer to Figure 6 and Figure 8 , a number of connected tooth surfaces one are evenly provided on the rear end surface of the moving ratchet 13. The connected tooth surface one includes a steep contact inclined surface one 132. The other end of the steep contact inclined surface one 132 is provided with a gentle contact inclined surface one 133. The rear end surface of the moving ratchet 13 is connected to the connected tooth surface two provided at the front end of the static ratchet 14 through the connected tooth surface one. The steep contact inclined surface one 132 contacts the steep contact inclined surface two 143, and the gentle contact inclined surface one 133 is connected to the gentle contact inclined surface two 144, completing the connection of the anti-loosening structure.

[0039] On the front end face of the static ratchet 14, a number of connecting tooth surfaces two that are connected end to end are evenly provided. The connecting tooth surface two includes a steep contact inclined surface two 143. At the other end of the steep contact inclined surface two 143, a gentle contact inclined surface two 144 is provided. When the rotating connecting ring 8 is rotated, it drives the fixed rubber sleeve housing 7 to rotate a certain angle at the outer end of the connecting pipe 2. At this time, the gap between the two can be compensated by the compression or relaxation of the sealing rubber ring 3, ensuring the firmness of their connection. Rotating the connecting ring 8 drives the moving ratchet 13 to perform a circumferential movement, pressing the steep contact inclined surface one 132 into the steep contact inclined surface two 143, and pressing the gentle contact inclined surface one 133 into the gentle contact inclined surface two 144, completing the connection of the two groups of ratchets and forming a complete anti-loosening structure.

[0040] Refer to Figure 2 , a fixed rubber sleeve housing 7 is provided at the outer end of the connecting pipe 2. A connecting ring 8 is provided at the rear end of the fixed rubber sleeve housing 7. An internal thread connecting wall 71 is provided on the inner wall of the fixed rubber sleeve housing 7. A retaining ring 72 is provided at the rear end of the fixed rubber sleeve housing 7. A number of fixing grooves one 73 are evenly provided inside the retaining ring 72. The connecting pipe 2 is connected to the fixed rubber sleeve housing 7 through the external thread connecting wall 4, ensuring the practicality of the connection structure. The retaining ring 72 is provided to establish the abutment of the fixed rubber sleeve housing 7 against the fixing block 142 on the static ratchet 14. The fixing groove one 73 cooperates with the fixing groove two to fix the setting of the fixing block 142, strengthening the anti-loosening setting of the fixed rubber sleeve housing 7 and the static ratchet 14. The fixed rubber sleeve housing 7 completes the structural stability of the combination of the connecting pipe 2, the fixed cylinder 9 and its components, avoiding the loosening or even detachment of the connection structure.

[0041] The internal thread connecting wall 71 and the external thread connecting wall 4 are meshed with each other. Align the internal thread connecting wall 71 of the fixed rubber sleeve housing 7 with the external thread connecting wall 4, and rotate the fixed rubber sleeve housing 7 to set the fixed rubber sleeve housing 7 on the connecting pipe 2.

[0042] On the inner side of the wall plate of the connecting ring 8, a friction gasket 81 is provided. On the inner side of the friction gasket 81, a connecting ring 82 is provided. A number of key grooves 83 are evenly provided on the connecting ring 82. The connecting ring 8 is provided on the fixed rubber sleeve housing 7 and can rotate on the fixed rubber sleeve housing 7 to realize the rotation and connection control of the moving ratchet 13. The connecting ring 8 enhances the stability control of the rotation of the connecting ring 82 by providing the friction gasket 81. The connecting ring 82 fixes the limit of the clamping key 131 by providing the key grooves 83, establishing the rotation limit control of the connecting ring 8 on the moving ratchet 13.

[0043] At the connection between the connecting pipe 2 and the front end of the fixed rubber sleeve housing 7, there is an installation card slot. Inside the installation card slot, there is a sealing rubber ring 3. The surface of the sealing rubber ring 3 is provided with a steel edge. The installation of the sealing rubber ring 3 is fixed by setting the installation card slot on the wall of the connecting pipe 2. The sealing rubber ring 3 can achieve the functions of sealing and anti-corrosion protection at the connection between the fixed rubber sleeve housing 7 and the connecting pipe 2, further enhancing the assembly safety between the connecting pipe 2, the fixed cylinder 9 and its components. Setting the steel edge can effectively prevent the radial surface of the sealing rubber ring 3 from deforming due to external force extrusion or temperature effects, ensuring the service performance of the sealing rubber ring 3.

[0044] Refer to Figure 4 and Figure 5 On the outer end of the wheel wall of the moving ratchet 13, a number of clamping keys 131 are evenly provided. The specifications of the clamping keys 131 are mutually adapted to the specifications of the inner cavity of the key slot 83. The moving ratchet 13 realizes the rotational control of the connecting ring 8 by inserting the clamping keys 131 into the key slot 83.

[0045] Inside the static ratchet 14, there is a fixing ring 141. Fixing slots two are respectively provided at the positions corresponding to the fixing slot one 73 on the fixing ring 141. Fixing blocks 142 are provided in the fixing slot one 73 and the fixing slots two. The static ratchet 14 makes the fixing slots two correspond to the fixing slot one 73 by using the fixing ring 141, facilitating the simultaneous insertion of the fixing blocks 142 into the fixing slot one 73 and the fixing slots two, realizing the connection limit of the static ratchet 14 and the fixed rubber sleeve housing 7.

[0046] A ratchet anti-loosening structure provided by an embodiment of the present utility model fixes the limit installation of the limit connection block 10 by fixing the limit card slot 5 of the socket assembly, completes the limit setting of the plug assembly, cooperates with the fixed rubber sleeve housing 7 and the outer ends of the connecting ring 8 to limit the outer ends of the socket and plug assemblies. Rotating the connecting ring 8 can control the moving ratchet 13 to establish tooth surface meshing with the static ratchet 14, completing the combined connection of the anti-loosening device, thereby effectively ensuring that the two groups of ratchets form a tight anti-loosening structure.

[0047] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited thereto. Without departing from the spirit and scope of the present disclosure, those skilled in the art can make various changes and modifications, and these changes and modifications will all fall within the protection scope of the present utility model.

Claims

1. A ratchet anti-loosening structure, characterized in that The invention comprises a socket (1), a connecting pipe (2) and a limit connecting block (10); a connecting pipe (2) is arranged at the rear of the socket (1); an externally threaded connecting wall (4) is arranged at the rear end of the connecting pipe (2); a plurality of limit slots (5) are arranged in the inner cavity of the externally threaded connecting wall (4); a limit connecting block (10) is arranged at the front end of the inner cavity of the limit slot (5); a fixing cylinder (9) is arranged at the rear of the fixing cylinder (9); a contact ring (11) is arranged at the rear of the contact ring (11); a static ratchet (14) is arranged at the rear of the contact ring (11); a dynamic ratchet (13) is arranged at the front end of the static ratchet (14); a corrugated spring (12) is arranged at the front end of the dynamic ratchet (13); a connecting plug (15) is arranged at the center of the inner cavity of the static ratchet (14); The limiting connection block (10) comprises a clamping column (101), a sliding groove is provided at the front end of the clamping column (101), a sliding block 1 (102) is provided on the left side of the inner cavity of the sliding groove, a sliding block 2 (103) is provided on the right side of the inner cavity of the sliding groove, and a strong spring (104) is provided between the sliding block 1 (102) and the sliding block 2 (103); Wherein, the wall plates of the limit card slot (5) are respectively provided with stoppers (6), and the width of the front end of the limit card slot (5) is set to be 2 mm greater than the width of the rear end slot body of the limit card slot (5) between the two groups of stoppers (6); Wherein, a plurality of connecting tooth surfaces 1 connected end to end are evenly arranged on the rear end surface of the movable ratchet (13), the connecting tooth surface 1 includes a steep contact inclined surface 1 (132), and a gentle contact inclined surface 1 (133) is arranged at the other end of the steep contact inclined surface 1 (132); A plurality of connecting tooth surfaces 2 connected end to end are evenly arranged on the front end surface of the static ratchet (14), and the connecting tooth surface 2 includes a steep contact slope 2 (143), and a gentle contact slope 2 (144) is arranged at the other end of the steep contact slope 2 (143).

2. The ratchet anti-loosening structure according to claim 1, wherein, The outer end of the connecting pipe (2) is provided with a fixed rubber sleeve (7), the rear end of the fixed rubber sleeve (7) is provided with a connecting ring (8), the inner wall of the fixed rubber sleeve (7) is provided with an internal thread connecting wall (71), the rear end of the fixed rubber sleeve (7) is provided with a retaining ring (72), and the inner side of the retaining ring (72) is evenly provided with a plurality of fixing grooves (73).

3. The ratchet anti-loosening structure according to claim 2, characterized in that, The internal thread connection wall (71) and the external thread connection wall (4) are meshed with each other.

4. A ratchet anti-loosening structure according to claim 2, characterized in that, A friction pad (81) is provided on the inner side of the wall plate of the connecting ring (8), a connecting ring (82) is provided on the inner side of the friction pad (81), and a plurality of key grooves (83) are evenly provided on the connecting ring (82).

5. A ratchet anti-loosening structure according to claim 1, characterized in that, A mounting slot is provided at the connection point between the connecting pipe (2) and the front end of the fixed rubber sleeve (7), a sealing rubber ring (3) is provided in the mounting slot, and a steel edging is provided on the surface of the sealing rubber ring (3).

6. A ratchet anti-loosening structure according to claim 4, characterized in that, A plurality of snap-fit ​​keys (131) are evenly arranged on the outer end of the wheel wall of the movable ratchet wheel (13), and the specifications of the snap-fit ​​keys (131) are mutually compatible with the specifications of the inner cavity of the key slot (83).

7. A ratchet anti-loosening structure according to claim 2, characterized in that, The inner cavity of the static ratchet wheel (14) is provided with a fixing ring (141). Fixing grooves II are respectively arranged at positions corresponding to the fixing grooves I (73) on the fixing ring (141). Fixing blocks (142) are arranged in the fixing grooves I (73) and the fixing grooves II.

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