A type of anti-loosening joint structure

Abstract

This utility model discloses an anti-loosening joint structure, including a first joint and a second joint; the first joint is provided with a threaded post, and the second joint is provided with a threaded hole that mates with the threaded post. The first joint includes a connecting section located on the upper part of the threaded post, and an anti-loosening element is sleeved on the outside of the threaded post and located between the connecting section and the second joint. The anti-loosening element slides axially on the connecting section and can be connected and fixed to the second joint or axially separated. The outer wall of the connecting section is provided with at least one ratchet protrusion or ratchet ring, and the inner hole of the anti-loosening element is provided with a ratchet ring or at least one ratchet protrusion. The ratchet protrusion and the ratchet ring mesh to form a circumferentially reversible structure. At least one of the ratchet ring and the ratchet protrusion is made of an elastically deformable material. The joint structure of this utility model allows the anti-loosening element to elastically slide and rotate relative to the connecting section in the thread tightening direction, and forms a rigid lock in the thread loosening direction, effectively resisting circumferential loosening caused by vibration and impact.

Description

Technical Field

[0001] This utility model relates to the field of pipeline connection technology, and in particular to an anti-loosening joint structure. Background Technology

[0002] Threaded joints are widely used in pipeline connections, fluid transport, and equipment assembly (such as washing machine inlet pipes, faucet connections, and hydraulic lines) due to their disassembly and sealing properties. However, traditional threaded joints have significant drawbacks under dynamic conditions of vibration, impact, or periodic temperature changes: the threaded pair is susceptible to gradual loosening due to circumferential rotational torque, leading to seal failure, media leakage, or even joint separation. This problem is particularly prominent in high-frequency vibration scenarios such as washing machines and compressors.

[0003] Existing anti-loosening solutions (such as elastic washers and lock nuts) mainly rely on increasing static preload or frictional resistance to achieve anti-loosening, and cannot actively resist the circumferential rotational tendency: the preload can only delay loosening, and cannot fundamentally block the reverse torque of the threaded pair under vibration. Therefore, there is an urgent need for a threaded joint anti-loosening structure that can dynamically lock in the reverse direction and maintain anti-loosening performance over a long period of time. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide an anti-loosening joint structure.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an anti-loosening joint structure, comprising a first joint and a second joint; the first joint is provided with a threaded post, and the second joint is provided with a threaded hole that mates with the threaded post; the first joint includes a connecting section located at the upper part of the threaded post; an anti-loosening member is sleeved on the threaded post and located between the connecting section and the second joint; the anti-loosening member slides axially on the connecting section and can be connected and fixed to the second joint or axially separated; the outer wall of the connecting section is provided with at least one ratchet protrusion or ratchet ring, and the inner hole of the anti-loosening member is provided with a ratchet ring or at least one ratchet protrusion; the ratchet protrusion and the ratchet ring mesh to form a circumferentially reversible structure; the ratchet protrusion meshes with the ratchet ring to form a unidirectional rotational fit that allows the anti-loosening member to rotate relative to the connecting section in the thread tightening direction and prevents the anti-loosening member from rotating relative to the connecting section in the thread loosening direction; at least one of the ratchet ring and the ratchet protrusion is made of an elastically deformable material.

[0006] As a preferred embodiment of this utility model, the ratchet ring is an assembly of continuously circumferentially distributed ratchet protrusions.

[0007] As a preferred technical solution of this utility model, the ratchet protrusion includes a guide slope and a non-reverse surface set at an acute angle. When the anti-loosening component rotates in the direction of thread tightening, the guide slope with tooth shape slides against each other. When the anti-loosening component rotates in the direction of thread loosening, the non-reverse surface with tooth shape abuts against each other to form rigid interference.

[0008] As a preferred technical solution of this utility model, the anti-loosening component and the second connector are detachably connected by an axial snap-fit ​​structure.

[0009] As a preferred technical solution of this utility model, the axial snap-fit ​​structure includes: at least two circumferentially distributed snap-fit ​​blocks disposed on the anti-loosening member; a snap-fit ​​groove disposed on the second joint and corresponding to the position of the snap-fit ​​blocks; the snap-fit ​​blocks are inserted into the snap-fit ​​groove along the axial direction of the second joint for connection and fixation.

[0010] As a preferred embodiment of this utility model, the second connector is provided with a polygonal column, and the inner hole of the anti-loosening component includes a polygonal cavity that can be circumferentially limited and matched with the polygonal column.

[0011] As a preferred technical solution of this utility model, the second joint has axial spline teeth evenly distributed on its outer circumference, and the inner hole of the anti-loosening component includes a spline groove that can be circumferentially limited and matched with the spline teeth.

[0012] As a preferred technical solution of this utility model, the outer wall of the second connector is provided with a radial protruding key, and the inner hole of the anti-loosening component includes an axial keyway that can be circumferentially limited and matched with the radial protruding key.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the elastic ratchet structure (at least one of the ratchet ring and ratchet protrusion can be deformed) allows the guide slope to slide in the tightening direction, and forms rigid interference through the anti-reverse surface in the loosening direction, directly blocking the thread reversal trend caused by vibration, breaking through the traditional reliance on pre-tightening force, effectively resisting circumferential loosening caused by vibration and impact, and the anti-loosening part and the second connector achieve circumferential limiting through axial snap-fit / spline / keyway and other structures. When the second connector needs to be unscrewed, only the anti-loosening part needs to be axially separated to unscrew the second connector. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is an exploded view of this utility model;

[0016] Figure 3 This is a schematic diagram of the anti-loosening component in this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the first connector in this utility model;

[0018] Figure 5 yes Figure 4 A magnified view of part A;

[0019] Figure 6 This is a schematic cross-sectional view of the anti-loosening component and the second connector in this utility model.

[0020] Figure 7 This is a schematic cross-sectional view of the anti-loosening component and the second connector in this utility model.

[0021] Figure 8 This is a schematic cross-sectional view of the anti-loosening component and the second connector in this utility model.

[0022] Reference numerals: 1. First connector; 2. Second connector; 3. Threaded post; 4. Threaded hole; 5. Anti-loosening component; 6. Connecting section; 7. Racket protrusion; 8. Racket ring; 9. Guide slope; 10. Anti-reverse surface; 11. Locking block; 12. Locking groove; 13. Polygonal column; 14. Polygonal cavity; 15. Spline tooth; 16. Spline groove; 17. Radial key; 18. Axial keyway. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] like Figure 1-8The diagram illustrates an anti-loosening connector structure, comprising a first connector 1 and a second connector 2. The first connector 1 has a threaded post 3, and the second connector 2 has a threaded hole 4 that mates with the threaded post 3. The first connector 1 includes a connecting section 6 located on the upper part of the threaded post 3. An anti-loosening element 5 is sleeved on the threaded post 3 and located between the connecting section 6 and the second connector 2. The anti-loosening element 5 slides axially on the connecting section 6 and can be connected and fixed to the second connector 2 or axially separated. The outer wall of the connecting section 6 has at least one ratchet protrusion 7 or a ratchet ring 8, and the inner hole of the anti-loosening element 5 has a ratchet ring 8 or at least one ratchet protrusion 7. The ratchet protrusion 7 and the ratchet ring 8 engage to form a circumferentially reversible structure. The ratchet protrusion 7 and the ratchet ring 8 engage to form a unidirectional rotational fit that allows the anti-loosening element 5 to rotate relative to the connecting section 6 in the thread tightening direction and prevents the anti-loosening element 5 from rotating relative to the connecting section 6 in the thread loosening direction. At least one of the ratchet ring 8 and the ratchet protrusion 7 is made of an elastically deformable material. In this embodiment, the ratchet ring 8 is an assembly of continuously circumferentially distributed ratchet protrusions 7.

[0026] The anti-loosening structure of this application is applicable to threaded joint scenarios, especially for pipeline systems subject to vibration or pulse pressure, including but not limited to the following applications: Civilian pipelines: faucet valve core - faucet body, valve - water supply pipe, water supply pipe for fabric handling or washing equipment (washing machine inlet pipe), shower hose connector; Industrial pipelines: hydraulic pipe - pump body interface, air compressor quick-connect fitting - flange, cooling pipe - equipment port; Special connections: fire hydrant - water hose interface, gas meter - gas transmission pipe, cooling pipeline for new energy vehicle batteries. The anti-loosening component 5 and the two connectors in this application can be made of metal or injection-molded engineering plastics.

[0027] The elastic ratchet structure (at least one of the ratchet ring 8 and the ratchet protrusion 7 can be deformed) allows the guide slope 9 to slide in the tightening direction and forms rigid interference through the anti-reverse surface 10 in the loosening direction, directly blocking the thread reversal trend caused by vibration. It breaks through the traditional reliance on pre-tightening force and effectively resists circumferential loosening caused by vibration and impact. The anti-loosening part 5 and the second connector 2 achieve circumferential limiting through axial snap-fit / spline / keyway and other structures. When the second connector 2 needs to be unscrewed, only the anti-loosening part 5 needs to be axially separated to unscrew the second connector 2. It should be noted that the anti-loosening part 5 can be connected to the second connector 2 and rotated synchronously in the thread tightening direction. Alternatively, the anti-loosening part 5 can be moved above the second connector 2. After the second connector 2 is tightened, the anti-loosening part 5 can be moved downward to connect with the second connector 2, thereby limiting the loosening of the second connector 2.

[0028] The ratchet protrusion 7 includes a guide slope 9 and a check surface 10 with an acute angle. When the anti-loosening member 5 rotates in the direction of thread tightening, the guide slope 9 with the tooth shape slides against each other. When the anti-loosening member 5 rotates in the direction of thread loosening, the check surface 10 with the tooth shape abuts to form rigid interference.

[0029] The anti-loosening component 5 and the second connector 2 are detachably connected by an axial snap-fit ​​structure, which includes: at least two circumferentially distributed snap blocks 11 on the anti-loosening component 5; and a snap groove 12 on the second connector 2 corresponding to the position of the snap blocks 11. The snap blocks 11 are inserted into the snap groove 12 along the axial direction of the second connector 2 for connection and fixation.

[0030] like Figure 7 As shown, the second connector 2 is provided with a polygonal column 13. The inner hole of the anti-loosening member 5 includes a polygonal cavity 14 that can be circumferentially limited and matched with the polygonal column 13. In this application, the polygon can be a triangle, a quadrilateral, a hexagon, etc. Or, as... Figure 6 As shown, the second connector 2 has axially distributed spline teeth 15 on its outer circumference, and the inner hole of the anti-loosening component 5 includes a spline groove 16 that can circumferentially limit the spline teeth 15. Alternatively, as... Figure 8 As shown, the outer wall of the second connector 2 is provided with a radial protruding key 17, and the inner hole of the anti-loosening component 5 includes an axial keyway 18 that can be circumferentially limited and matched with the radial protruding key 17. In addition, other structures that can achieve the same circumferential constraint function are also applicable, except for the above structure. It should be noted that the upper inner hole of the anti-loosening component 5 is matched with the ratchet structure of the connecting section 6, and the lower inner hole is matched with the circumferential limiting structure of the second connector 2.

Claims

1. A lock washer structure comprising a first joint (1) and a second joint (2); a threaded column (3) is arranged on the first joint (1), a threaded hole (4) matched with the threaded column (3) is arranged on the second joint (2), the first joint (1) comprises a connecting section (6) at the upper part of the threaded column (3), a lock washer (5) is sleeved outside the threaded column (3) and located between the connecting section (6) and the second joint (2), characterized in that: The anti-loosening component (5) slides axially on the connecting section (6) and can be connected and fixed to the second connector (2) or axially separated; the outer wall of the connecting section (6) is provided with at least one ratchet protrusion (7) or ratchet ring (8), and the inner hole of the anti-loosening component (5) is provided with a ratchet ring (8) or at least one ratchet protrusion (7). The ratchet protrusion (7) and the ratchet ring (8) mesh to form a circumferentially reversible structure; the ratchet protrusion (7) and the ratchet ring (8) mesh to form a unidirectional rotational fit that allows the anti-loosening component (5) to rotate relative to the connecting section (6) in the thread tightening direction and prevents the anti-loosening component (5) from rotating relative to the connecting section (6) in the thread loosening direction. At least one of the ratchet ring (8) and the ratchet protrusion (7) is made of an elastically deformable material.

2. The lock washer structure of claim 1, wherein: The ratchet ring (8) is an assembly of continuously circumferentially distributed ratchet protrusions (7).

3. The lock washer structure of claim 1, wherein: The ratchet protrusion (7) includes a guide slope (9) and a backstop surface (10) set at an acute angle. When the anti-loosening member (5) rotates in the direction of thread tightening, the guide slope (9) with the tooth shape slides against each other. When the anti-loosening member (5) rotates in the direction of thread loosening, the backstop surface (10) with the tooth shape abuts to form rigid interference.

4. The anti-loosening joint structure according to claim 1, characterized in that: The anti-loosening component (5) and the second connector (2) are detachably connected by an axial snap-fit ​​structure.

5. The lock washer structure of claim 4, wherein: The axial snap-fit ​​structure includes: at least two circumferentially distributed snap-fit ​​blocks (11) on the anti-loosening member (5); a snap-fit ​​groove (12) on the second connector (2) and corresponding to the position of the snap-fit ​​blocks (11); the snap-fit ​​blocks (11) are inserted into the snap-fit ​​groove (12) along the axial direction of the second connector (2) for connection and fixation.

6. The lock washer structure of claim 1, wherein: The second connector (2) is provided with a polygonal column (13), and the inner hole of the anti-loosening member (5) includes a polygonal cavity (14) that can be circumferentially limited and matched with the polygonal column (13).

7. The lock washer structure of claim 1, wherein: The second connector (2) has axial spline teeth (15) evenly distributed on its outer periphery, and the inner hole of the anti-loosening component (5) includes a spline groove (16) that can be circumferentially limited and matched with the spline teeth (15).

8. The lock washer structure of claim 1, wherein: The outer wall of the second connector (2) is provided with a radial protrusion key (17), and the inner hole of the anti-loosening component (5) includes an axial keyway (18) that can be circumferentially limited and matched with the radial protrusion key (17).

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