Anti-loosening structure of high-strength bolt

Abstract

The utility model discloses an anti-loosening structure of a high-strength bolt, which is characterized in that a groove is arranged at one end of a stud, which is provided with a thread, and the groove is provided with a groove wall which can tip over towards the outer side. Compared with the prior art, the bolt has the advantages that the cylindrical groove is formed in the end, provided with the threads, of the bolt, and the simple structure that the opening is formed in the groove wall is adopted, so that the groove wall can tip over towards the outer side; in this way, after the nut is screwed down during installation, the possibility that the nut is loosened can be completely eradicated as long as the wall of the groove is turned over outwards to enable the pitch diameter of the thread at the tail end of the bolt to be increased. And as the groove wall is slightly deformed, only the groove wall needs to be restored to the original shape during disassembly. And meanwhile, the bolt can be repeatedly disassembled before the material fatigue limit is reached, the connecting strength is not influenced, and the appearance structure attractiveness of the bolt is not influenced.

Description

Technical Field

[0001] The utility model relates to an anti-loosening structure for a high-strength bolt. Background Art

[0002] Bolts are a type of connector that connects two parts together by screwing the threads on the bolt and nut. They are widely used because of their compact structure and strong connection capacity. However, when a bolt connection is subjected to external vibration loads, the preload force of the bolt will gradually decrease, eventually causing the bolt connection to loosen.

[0003] The commonly used anti-loosening bolts can be divided into two categories in terms of anti-loosening effect: one is to slow down the loosening of bolt connections, such as adding spring washers, anti-loosening nuts, double nut structures, etc. during installation. This structure cannot completely prevent the bolts from loosening and requires regular inspection. The second is to completely prevent the bolts from loosening, such as welding the nuts, fixing the nuts with pins, etc. This method is inconvenient to disassemble and affects the appearance. Utility Model Content

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the utility model proposes a high-strength bolt anti-loosening structure, which is simple and compact, easy to install and maintain, and has low processing cost, and can completely prevent the bolt from loosening.

[0005] The utility model solves the technical problem by adopting a technical solution: an anti-loosening structure of a high-strength bolt, a groove is provided at one end of the stud with threads, and the groove has a groove wall which can be tilted outward.

[0006] Furthermore, the groove is a cylindrical groove.

[0007] Furthermore, the thickness of the groove wall is greater than the thread height.

[0008] Furthermore, the depth of the groove is 1 to 4 times the height of the thread.

[0009] Furthermore, the depth of the groove is 3 times the height of the thread.

[0010] Furthermore, an open groove is provided on the groove wall.

[0011] Furthermore, the depth of the open groove is equal to the depth of the recessed groove.

[0012] Furthermore, the number of the open slots is 2 to 4.

[0013] Compared with the prior art, the positive effects of the utility model are:

[0014] The utility model has a simple structure of opening a cylindrical groove at one end of the bolt with threads and setting an opening on the groove wall, so that the groove wall can be tilted outward; thus, after the nut is tightened during installation, the groove wall only needs to be tilted outward to enlarge the thread diameter at the rear end of the bolt, thereby completely eliminating the possibility of the nut loosening. Since the groove wall is not deformed much, it only needs to be restored to its original state during disassembly. At the same time, it can be repeatedly disassembled before reaching the material fatigue limit without affecting its connection strength and the appearance and structure of the bolt.

[0015] At the same time, since the anti-loosening structure of the utility model is designed on the stud and is mechanically anti-loosening, it has high reliability and strong anti-loosening effect, and the overall structure is very compact; when preventing loosening, the groove wall is slightly turned outward, which is easy to return to its original state and can be disassembled and used many times.

[0016] Moreover, the anti-loosening structure of the high-strength bolt of the utility model has simple processing technology, low manufacturing cost and is also easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the anti-loosening bolt of the utility model after the nut is tightened and anti-loosening measures are taken;

[0020] The reference numerals in the figure include: groove 1, groove wall 2, opening groove 3, outward-inclined groove wall 4. DETAILED DESCRIPTION

[0021] A high-strength bolt anti-loosening structure, such as Figure 1 As shown, it includes a stud end groove 1, a groove wall 2, and an open groove 3.

[0022] A groove 1 is provided at one end of the stud with threads, and the minimum thickness of the groove wall 2 of the groove 1 is thicker than the thread height. An open groove 3 is provided on the groove wall 2, and the depth of the open groove 3 is equal to the depth of the groove 1. The depth of the groove 1 is 1 to 4 times the thread height, and the optimal depth is 3 times the thread height. The number of open grooves is 2 to 4. The groove 1 is a cylindrical groove.

[0023] During installation, tighten the nut first, then tilt the groove wall outward. Figure 2 As shown, this makes the thread diameter at the rear end of the stud larger, thereby preventing the nut from loosening from the stud.

[0024] The working principle of the utility model is:

[0025] The utility model changes the solid thread at the rear end of the stud into a cylindrical groove structure with an open groove. When the nut is tightened during installation, the groove wall only needs to be tilted outward to enlarge the thread diameter at the rear end of the bolt, thereby completely eliminating the possibility of the nut loosening. In addition, since the groove wall is not deformed much, it only needs to be restored to its original state during disassembly. At the same time, it can be disassembled repeatedly before reaching the material fatigue limit without affecting its connection strength, and at the same time, it does not affect the appearance and structure of the bolt.

Claims

1. A high-strength bolt anti-loosening structure, characterized in that: A groove is provided at one end of the stud with threads, and the groove has a groove wall that can be tilted outward; the groove is a cylindrical groove; the thickness of the groove wall is greater than the thread height; and an open groove is provided on the groove wall.

2. The anti-loosening structure of a high-strength bolt according to claim 1, characterized in that: The depth of the groove is 1 to 4 times the height of the thread.

3. The anti-loosening structure of a high-strength bolt according to claim 1, characterized in that: The depth of the groove is 3 times the height of the thread.

4. The anti-loosening structure of a high-strength bolt according to claim 1, characterized in that: The depth of the opening groove is equal to the depth of the recessed groove.

5. The anti-loosening structure of a high-strength bolt according to claim 1, characterized in that: The number of the open slots is 2 to 4.

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