Locking structure, threaded connector and application

Abstract

This invention discloses a locking structure, a threaded connector, and its application, belonging to the field of high-speed maglev train technology. The invention includes a plug, an inner nut, and an outer nut arranged sequentially from the inside out. The inner wall of the outer nut has a first groove with different depths at both ends and an arc-shaped bottom wall. The side wall of the inner nut has a first through hole corresponding to the first groove. The surface of the plug has several teeth facing the same direction, and the teeth are inclined. A locking assembly is provided between the teeth and the first groove, which locks the plug in place. The locking structure of this invention is simple to operate, has high locking reliability, and is easy to disassemble and maintain.

Description

Technical Field

[0001] This invention belongs to the field of high-speed maglev train technology, specifically relating to a locking structure, a threaded connector, and its application. Background Technology

[0002] High-speed maglev trains need to operate in various outdoor environments, and their electrical transmission relies on electrical connectors. The commonly used connectors are mainly circular and rectangular. Among them, the most common connection method for circular connectors is the threaded locking structure, which is the most reliable and has excellent environmental resistance. However, the simple threaded structure is prone to thread loosening under environmental conditions such as vibration and impact. Therefore, a self-locking structure after connection is required to ensure the reliable connection performance of the product.

[0003] Currently, the anti-loosening locking methods of threaded connection products on the market are mainly divided into two types: 1. For general threaded products, increase the tightening torque to meet the anti-loosening requirements under specified conditions (not completely anti-loosening), which is convenient and quick to operate, but has poor reliability; 2. For threaded connections, add glue application process or use fuse to carry out secondary reinforcement, which has high reliability, but the operation process is relatively cumbersome and not easy to disassemble and maintain. Summary of the Invention

[0004] To address the aforementioned shortcomings, this invention provides a locking structure, a threaded connector, and its application, which can lock and unlock the threaded structure, offering high reliability and ease of disassembly and maintenance.

[0005] The first aspect of this invention protects a locking structure, comprising a plug, an inner nut, and an outer nut arranged sequentially from the inside out;

[0006] The inner wall of the outer nut is provided with a first groove, the two ends of the first groove have different depths, and the first groove has an arc-shaped bottom wall;

[0007] The inner nut has a first through hole on its side wall, and the first through hole is corresponding to the first groove.

[0008] The surface of the plug is provided with several teeth facing the same direction. The teeth are inclined, and each tooth forms a small angle and a large angle with the surface of the plug.

[0009] A locking assembly is provided between the gear tooth and the first groove. The locking assembly includes a retaining bar, a shaft, and an elastic element. The retaining bar can rotate around the shaft. The two ends of the retaining bar are a locking end and an adjusting end, respectively. The locking end is close to the gear tooth, and the adjusting end is in contact with the bottom wall of the first groove. The elastic element is provided between the locking end and the inner wall of the inner nut. The elastic element provides a force to the locking end that is close to the gear tooth.

[0010] Locked state: When the adjusting end is placed at one end of the first groove, and the plug rotates in the direction of the small included angle, the locking end can move along the inclined surface of the gear teeth, and the plug rotates normally; when the plug rotates in the direction of the large included angle, the locking end is stuck on the non-inclined surface of the gear teeth, and the plug cannot rotate.

[0011] Unlocked state: Rotate the outer nut to place the adjusting end at the shallow end of the first groove. The bottom wall of the first groove presses against the adjusting end, causing the locking end to move away from the gear teeth, and the plug can rotate freely.

[0012] Furthermore, the inner wall of the outer nut is provided with a second groove, and the outer surface of the inner nut is provided with a protruding key. The protruding key is correspondingly provided with the second groove, and the protruding key can limit the outer nut so that the adjusting end can be placed at the deep or shallow end of the first groove.

[0013] Furthermore, the elastic element is an n-type spring sheet, which has a free end and a non-free end. The locking strip is provided with a second through hole, the non-free end passes through the second through hole, the shaft is placed between the non-free end and the second through hole, and the free end is placed between the locking end and the inner wall of the inner nut.

[0014] Furthermore, the locking end is provided with a first bend, the first bend facing the gear teeth, and the adjusting end is provided with a second bend, the second bend away from the bottom wall of the first groove.

[0015] A second aspect of the present invention protects a threaded connector, including the locking structure described above, and further including an external thread provided on the outer surface of the plug, and an internal thread provided on the inner wall of the inner nut, wherein the internal thread mates with the external thread.

[0016] The third aspect of this invention protects the application of the above-described locking structure or threaded connector in high-speed maglev trains.

[0017] Beneficial effects:

[0018] This invention utilizes inclined gear teeth to allow the locking bar to rotate in a specific direction, achieving a locking function. An arc-shaped bottom wall allows the adjusting end to slide along a shallow or deep first groove, thus moving the locking end closer to or further away from the gear teeth, switching the locking structure between locked and unlocked states. An elastic element ensures the locking end fits snugly against or between the gear teeth. The locking structure of this invention is simple to operate, highly reliable, and easy to disassemble and maintain. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] in:

[0021] Figure 1 This is a schematic diagram of the locking structure in one embodiment of the present invention.

[0022] Figure 2 for Figure 1 Cross-sectional view in the DD direction.

[0023] Figure 3 This is a schematic diagram of the locking assembly in one embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the card strip structure in one embodiment of the present invention.

[0025] Figure 5 This is a schematic diagram of the spring sheet structure in one embodiment of the present invention.

[0026] In the diagram, 1 is the plug; 11 is the gear tooth; 2 is the outer nut; 21 is the second groove; 22 is the first groove; 3 is the inner nut; 31 is the key; 32 is the first through hole; 4 is the locking assembly; 41 is the retaining strip; 411 is the second through hole; 412 is the first bend; 413 is the second bend; 42 is the shaft; and 43 is the spring. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] refer to Figures 1-5 The present invention protects a locking structure comprising a plug 1, an inner nut 3 and an outer nut 2 arranged sequentially from the inside out.

[0029] The inner wall of the outer nut 2 is provided with a first groove 22, the two ends of the first groove 22 have different depths, and the first groove 22 has an arc-shaped bottom wall.

[0030] The inner nut 3 has a first through hole 32 on its side wall, and the first through hole 32 is correspondingly provided with the first groove 22.

[0031] The surface of the plug 1 is provided with several teeth 11 facing the same direction. The teeth 11 are inclined, meaning they can be inclined in any direction, preferably in the direction of the circumference of the plug 1, so that better locking can be achieved when the plug 1 is rotated. Each tooth 11 forms a small angle and a large angle with the surface of the plug 1. The inclination angle of the tooth 11 is 20°~65°, the inclination angle is the angle of the small angle, the inclination angle is preferably 30°, 35°, 40°, 45°, 50° and 60°, and the large angle is 90°~110°, preferably 90°.

[0032] A locking assembly 4 is provided between the gear tooth 11 and the first groove 22. A receiving cavity is provided on the inner wall of the inner nut 3 to accommodate the locking assembly 4, which includes a retaining strip 41, a shaft 42 and an elastic element. The two ends of the shaft 42 are connected to the inner wall of the receiving cavity, so that the retaining strip 41 can rotate around the shaft 42. The two ends of the retaining strip 41 are a locking end and an adjusting end, respectively. The locking end is close to the gear tooth 11, and the adjusting end is in contact with the bottom wall of the first groove 22. An elastic element is provided between the locking end and the inner wall of the inner nut 3. The elastic element provides a force to the locking end that is close to the gear tooth 11.

[0033] Locking state: When the adjusting end is placed at the deep end of the first groove 22, when the plug 1 is rotated in the direction of the small included angle, the locking end can move along the inclined surface of the gear tooth 11 and the plug 1 rotates normally; when the plug 1 is rotated in the direction of the large included angle, the locking end is stuck on the non-inclined surface of the gear tooth 11 and the plug 1 cannot rotate.

[0034] Unlocked state: Rotate the outer nut 2 to place the adjusting end at the shallow end of the first groove 22. The bottom wall of the first groove 22 presses against the adjusting end to move the locking end away from the gear tooth 11, and the plug 1 can rotate freely.

[0035] In one specific embodiment, the inner wall of the outer nut 2 is provided with a second groove 21, and the outer surface of the inner nut 3 is provided with a protruding key 31. The protruding key 31 is correspondingly provided with the second groove 21. The protruding key 31 can limit the outer nut 2 so that the adjustment end can be placed at the deep or shallow end of the first groove.

[0036] In one specific embodiment, the elastic element is an n-type spring sheet 43, which has a free end and a non-free end. The retaining strip 41 has a second through hole 411, through which the non-free end passes. The shaft 42 is positioned between the non-free end and the second through hole 411, and the free end is positioned between the locking end and the inner wall of the inner nut 3. The free end refers to the two movable surfaces of the spring sheet 43, and the non-free end refers to the connection position connecting the two free ends.

[0037] In one specific embodiment, the locking end is provided with a first bending portion 412 facing the gear tooth 11, and the adjusting end is provided with a second bending portion 413 facing away from the bottom wall of the first groove 22.

[0038] A second aspect of this invention protects a threaded connector, including the aforementioned locking structure, and further including an external thread on the outer surface of the plug 1, and an internal thread on the inner wall of the inner nut 3, the internal thread engaging with the external thread. The external thread and the gear tooth 11 are positioned differently, and the engagement of the external thread and the internal thread can axially fix the plug and the inner nut.

[0039] The third aspect of this invention protects the application of locking structures or threaded connectors in fields requiring fastening of threaded connectors, particularly in high-speed maglev trains.

[0040] The above description discloses only preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A locking structure, characterized in that, It includes a plug (1), an inner nut (3), and an outer nut (2) arranged sequentially from the inside out; The inner wall of the outer nut (2) is provided with a first groove (22), the two ends of the first groove (22) are of different depths, and the first groove (22) has an arc-shaped bottom wall; The inner nut (3) has a first through hole (32) on its side wall, and the first through hole (32) is correspondingly provided with the first groove (22); The surface of the plug (1) is provided with several teeth (11) facing the same direction. The teeth (11) are inclined and each tooth (11) forms a small angle and a large angle with the surface of the plug (1). A locking assembly (4) is provided between the gear tooth (11) and the first groove (22). The locking assembly (4) includes a retaining bar (41), a shaft (42), and an elastic element. The retaining bar (41) can rotate around the shaft (42). The two ends of the retaining bar (41) are a locking end and an adjusting end, respectively. The locking end is close to the gear tooth (11). A second groove (21) is provided on the inner wall of the outer nut (2). The adjusting end contacts the bottom wall of the second groove (21). The elastic element is provided between the locking end and the inner wall of the inner nut (3). The elastic element provides a force to the locking end that is close to the gear tooth (11). The outer surface of the inner nut (3) is provided with a protruding key (31), which is correspondingly provided with the second groove (21). The protruding key (31) can limit the outer nut (2) so that the adjustment end can be placed at the deep or shallow end of the first groove. Locked state: When the adjusting end is placed at the deep end of the second groove (21), when the plug (1) rotates in the direction of the small included angle, the locking end can move along the inclined surface of the gear tooth (11), and the plug (1) rotates normally; when the plug (1) rotates in the direction of the large included angle, the locking end is stuck on the non-inclined surface of the gear tooth (11), and the plug (1) cannot rotate; Unlocked state: Rotate the outer nut (2) to place the adjusting end at the shallow end of the second groove (21), the bottom wall of the second groove (21) presses the adjusting end to make the locking end move away from the gear tooth (11), and the plug (1) can rotate freely.

2. The locking structure according to claim 1, characterized in that, The elastic element is an n-type spring sheet (43), which has a free end and a non-free end. The locking strip (41) is provided with a second through hole (411), the non-free end passes through the second through hole (411), the shaft (42) is placed between the non-free end and the second through hole (411), and the free end is placed between the locking end and the inner wall of the inner nut (3).

3. The locking structure according to claim 1, characterized in that, The locking end is provided with a first bending part (412) facing the gear tooth (11), and the adjusting end is provided with a second bending part (413) away from the bottom wall of the first groove (22).

4. A threaded connector, characterized in that, The locking structure includes any one of claims 1 to 3, and further includes an external thread on the outer surface of the plug (1), and an internal thread on the inner wall of the inner nut (3), wherein the internal thread engages with the external thread.

5. The application of a locking structure as described in any one of claims 1 to 3 or a threaded connector as described in claim 4 in a high-speed maglev train.

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