A sliding type thread locking joint structure

Abstract

This utility model relates to the field of pipeline connection technology, specifically disclosing a sliding threaded anti-loosening joint structure. It includes a first joint with a threaded post and a second joint with a threaded hole. An anti-loosening element is sleeved on the threaded post, located between the first joint connection section and the second joint. The anti-loosening element achieves circumferential fixation and axial sliding with the connection section through polygonal, splined, or keyway shapes. The anti-loosening element and the second joint have first and second ratchet surfaces on their opposite end faces. When the two ratchet surfaces engage, the second joint is allowed to rotate in the thread tightening direction, and rotation in the loosening direction is mechanically prevented by the ratchet anti-reverse surface. This structure utilizes the axial sliding of the anti-loosening element to adaptively compensate for preload loss, and effectively resists circumferential loosening caused by vibration and impact through the ratchet unidirectional locking mechanism, solving the sealing failure problem of traditional threaded joints under varying operating conditions.

Description

Technical Field

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

[0002] Threaded joints are widely used in pipeline connections, fluid transportation, and equipment assembly due to their detachability and sealing properties. However, traditional threaded joints are prone to loosening under vibration, impact, or temperature changes, leading to seal failure or even structural separation, especially in high-frequency vibration scenarios such as washing machine inlet pipes and faucet connections. Existing anti-loosening joints that rely on static preload cannot effectively resist circumferential rotational torque, and their anti-loosening performance is prone to degradation due to material creep or stress relaxation after long-term use. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a sliding threaded anti-loosening joint structure.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a sliding threaded 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; an anti-loosening element is sleeved on the threaded post; the first joint includes a connecting section located at the upper part of the threaded post, and an anti-loosening element is sleeved on the threaded post and located between the connecting section and the second joint; the anti-loosening element and the connecting section are circumferentially fixed by form fit and can slide axially along the connecting section; the end face of the anti-loosening element facing the second joint is provided with a first ratchet surface; the end face of the second joint facing the anti-loosening element is provided with a second ratchet surface; when the first ratchet surface and the second ratchet surface are engaged, the second joint is allowed to rotate relative to the first joint in the thread tightening direction, and the second joint is prevented from rotating in the thread loosening direction.

[0005] As a preferred embodiment of the present invention, the first ratchet surface and / or the second ratchet surface are composed of a plurality of ratchet units evenly distributed along the circumferential direction; each ratchet unit includes a guide slope and a backstop surface.

[0006] As a preferred technical solution of this utility model, it also includes an elastic reset element; the elastic reset element is disposed between the connecting section and the anti-loosening member, and always applies an axial preload force toward the second joint to the anti-loosening member.

[0007] As a preferred technical solution of this utility model, the second connector includes a connector seat and a seat ring. The seat ring is sleeved outside the connector seat and the end face of the seat ring is provided with the second ratchet surface. The seat ring and the connector seat are detachably connected by an axial snap-fit ​​structure.

[0008] As a preferred embodiment of this utility model, the axial snap-fit ​​structure includes: at least two circumferentially distributed snap-fit ​​blocks disposed on the end face of the seat ring; a snap-fit ​​groove disposed on the end face of the connector seat 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 connector seat for connection and fixation.

[0009] As a preferred embodiment of this utility model, the connecting section is a polygonal column, and the inner hole of the anti-loosening component is provided with a polygonal cavity.

[0010] As a preferred technical solution of this utility model, the connecting section has axial spline teeth evenly distributed on its outer circumference, and the anti-loosening component has a spline groove in its inner hole.

[0011] As a preferred technical solution of this utility model, the outer wall of the connecting section is provided with a radial protruding key, and the inner hole of the anti-loosening component is provided with an axial keyway. When the protruding key is embedded in the keyway, its circumferential rotational freedom is restricted.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The anti-loosening component of this application achieves circumferential fixation and axial sliding with the connecting section through the shape matching of polygons, splines, or keyways; the anti-loosening component and the opposite end face of the second connector are respectively provided with first and second ratchet surfaces; when the two ratchet surfaces are engaged, the second connector is allowed to rotate in the thread tightening direction, and the ratchet anti-reverse surface mechanically locks against rotation in the loosening direction. This structure utilizes the axial sliding of the anti-loosening component to adaptively compensate for the preload loss, and uses its own gravity or elastic reset element to make the first and second ratchet surfaces engage. Through the ratchet one-way locking mechanism, it effectively resists circumferential loosening caused by vibration and impact, solving the problem of sealing failure of traditional threaded joints under varying working conditions. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0015] Figure 3 This is an exploded view of this utility model;

[0016] Figure 4 This is a schematic diagram of the anti-loosening component in this utility model;

[0017] Figure 5 This is a schematic diagram of the structure of the second connector in this utility model;

[0018] Figure 6 This is a schematic diagram of the cross-sectional structure of the anti-loosening component and the connecting section in this utility model;

[0019] Figure 7This is a schematic diagram of the cross-sectional structure of the anti-loosening component and the connecting section in this utility model.

[0020] Reference numerals: 1. First connector; 2. Second connector; 3. Threaded post; 4. Threaded hole; 5. Anti-loosening element; 6. Connecting section; 7. Spline groove; 8. First ratchet surface; 9. Second ratchet surface; 10. Guide slope; 11. Anti-reverse surface; 12. Elastic reset element; 13. Connector seat; 14. Seat ring; 15. Locking block; 16. Locking groove; 17. Polygonal post; 18. Polygonal cavity; 19. Spline tooth; 20. Raised key; 21. Keyway. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] like Figure 1-7 The sliding threaded anti-loosening joint structure shown includes a first joint 1 and a second joint 2. The first joint 1 is provided with a threaded post 3, and the second joint 2 is provided with a threaded hole 4 that mates with the threaded post 3. An anti-loosening element 5 is sleeved on the threaded post 3. The first joint 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 joint 2. The anti-loosening element 5 and the connecting section 6 are circumferentially fixed by form fit and can slide axially along the connecting section 6. The end face of the anti-loosening element 5 facing the second joint 2 is provided with a first ratchet surface 8. The end face of the second joint 2 facing the anti-loosening element 5 is provided with a second ratchet surface 9. When the first ratchet surface 8 and the second ratchet surface 9 are engaged, the second joint 2 is allowed to rotate relative to the first joint 1 in the thread tightening direction and is prevented from rotating in the thread loosening direction.

[0024] The anti-loosening component 5 of this application achieves circumferential fixation and axial sliding with the connecting section 6 through the shape of polygons, splines, or keyways 21. The anti-loosening component 5 and the second connector 2 have first and second ratchet surfaces 9 respectively on their opposite end faces. When the two ratchet surfaces are engaged, the second connector 2 is allowed to rotate in the thread tightening direction, and the ratchet anti-reverse surface 11 mechanically locks against rotation in the loosening direction. This structure utilizes the axial sliding of the anti-loosening component 5 to adaptively compensate for preload loss, and uses its own gravity or elastic reset element 12 to engage the first ratchet surface 8 and the second ratchet surface 9. The ratchet unidirectional locking mechanism effectively resists circumferential loosening caused by vibration and impact, solving the problem of sealing failure of traditional threaded joints under varying working conditions.

[0025] 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.

[0026] The first ratchet surface 8 and / or the second ratchet surface 9 are composed of a plurality of ratchet units evenly distributed along the circumferential direction; each ratchet unit includes a guide slope 10 and a backstop surface 11. When the second connector 2 needs to be loosened, the user moves the anti-loosening part 5 away from the second connector 2, so that the first ratchet surface 8 and the second ratchet surface 9 can be separated and the engagement state can be released.

[0027] It also includes an elastic reset element 12; the elastic reset element 12 is disposed between the connecting section 6 and the anti-loosening member 5, and always applies an axial preload force toward the second joint 2 to the anti-loosening member 5. In this embodiment, the elastic reset element 12 is a compression spring; a mounting cavity is formed between the anti-loosening member 5 and the outer wall of the first joint 1, and the compression spring is housed in the mounting cavity, with its two ends abutting against the axial limiting surface of the first joint 1 and the inner end face of the anti-loosening member 5, respectively; alternatively, the compression spring can be disposed in other positions that can achieve the same driving function.

[0028] The second connector 2 includes a connector seat 13 and a seat ring 14. The seat ring 14 is sleeved on the outside of the connector seat and the end face of the seat ring 14 is provided with the second ratchet surface 9. The seat ring 14 and the connector seat 13 are detachably connected by an axial snap-fit ​​structure.

[0029] The axial snap-fit ​​structure includes: at least two circumferentially distributed snap-fit ​​blocks 15 disposed on the end face of the seat ring 14; and a snap-fit ​​groove 16 disposed on the end face of the connector seat 13, corresponding to the position of the snap-fit ​​blocks 15; the snap-fit ​​blocks 15 are inserted into the snap-fit ​​groove 16 along the axial direction of the connector seat 13 for connection and fixation. In addition to the snap-fit ​​structure, screw fastening can also be used, or the two can be integrated as a single piece.

[0030] like Figure 6 As shown, the connecting segment 6 is a polygonal prism 17 (trilateral, quadrilateral, hexagonal, etc.), and the inner hole of the anti-loosening component 5 is provided with a polygonal cavity 18. Alternatively, as... Figure 4 As shown, the connecting section 6 has axial spline teeth 19 evenly distributed on its outer circumference, and the anti-loosening part 5 has a spline groove 7 in its inner hole. Alternatively, as... Figure 7 As shown, the outer wall of the connecting section 6 is provided with a radial protruding key 20, and the inner hole of the anti-loosening part 5 is provided with an axial keyway 21. When the protruding key 20 is embedded in the keyway 21, its circumferential rotational freedom is restricted. In addition, other structures that can achieve the same circumferential constraint function are also applicable, except for the above structure.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples of this utility model and are not intended to limit it. Various changes and modifications can be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A sliding threaded anti-loosening joint structure, comprising a first joint (1) and a second joint (2); the first joint (1) is provided with a threaded post (3), and the second joint (2) is provided with a threaded hole (4) that mates with the threaded post (3), characterized in that: The threaded post (3) is fitted with an anti-loosening element (5); the first connector (1) includes a connecting section (6) located on the upper part of the threaded post (3), and an anti-loosening element (5) is fitted on the threaded post (3) and located between the connecting section (6) and the second connector (2); the anti-loosening element (5) and the connecting section (6) are circumferentially fixed by form fit and can slide along the axial direction of the connecting section (6); the end face of the anti-loosening element (5) facing the second connector (2) is provided with a first ratchet surface (8); the end face of the second connector (2) facing the anti-loosening element (5) is provided with a second ratchet surface (9); when the first ratchet surface (8) and the second ratchet surface (9) are engaged, the second connector (2) is allowed to rotate relative to the first connector (1) in the thread tightening direction and is prevented from rotating in the thread loosening direction.

2. The sliding threaded anti-loosening joint structure according to claim 1, characterized in that: The first ratchet surface (8) and / or the second ratchet surface (9) are composed of a plurality of ratchet units evenly distributed along the circumferential direction; each ratchet unit includes a guide ramp (10) and a backstop surface (11).

3. The sliding threaded anti-loosening joint structure according to claim 1, characterized in that: It also includes an elastic reset element (12); the elastic reset element (12) is located between the connecting section (6) and the anti-loosening member (5), and always applies an axial preload toward the second joint (2) to the anti-loosening member (5).

4. The sliding threaded anti-loosening joint structure according to claim 1, characterized in that: The second connector (2) includes a connector seat (13) and a seat ring (14). The seat ring (14) is sleeved on the outside of the connector seat and the end face of the seat ring (14) is provided with the second ratchet surface (9). The seat ring (14) and the connector seat (13) are detachably connected by an axial snap-fit ​​structure.

5. The sliding threaded anti-loosening joint structure according to claim 4, characterized in that: The axial snap-fit ​​structure includes: at least two circumferentially distributed snap-fit ​​blocks (15) on the end face of the seat ring (14); a snap-fit ​​groove (16) on the end face of the connector seat (13) corresponding to the position of the snap-fit ​​blocks (15); the snap-fit ​​blocks (15) are inserted into the snap-fit ​​groove (16) along the axial direction of the connector seat (13) for connection and fixation.

6. The sliding threaded anti-loosening joint structure according to any one of claims 1-5, characterized in that: The connecting section (6) is a polygonal column (17), and the inner hole of the anti-loosening component (5) is provided with a polygonal cavity (18).

7. The sliding threaded anti-loosening joint structure according to any one of claims 1-5, characterized in that: The connecting section (6) has axial spline teeth (19) evenly distributed on its outer circumference, and the anti-loosening part (5) has a spline groove (7) in its inner hole.

8. The sliding threaded anti-loosening joint structure according to any one of claims 1-5, characterized in that: The outer wall of the connecting section (6) is provided with a radial protruding key (20), and the inner hole of the anti-loosening part (5) is provided with an axial keyway (21). When the protruding key (20) is embedded in the keyway (21), its circumferential rotational freedom is restricted.

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