Anti-loosening nut

Abstract

The utility model provides an anti-loosening nut, and relates to the technical field of nuts, the anti-loosening nut comprises an upper nut and a lower nut, the lower nut and the upper nut are sequentially connected to a hexagon head bolt, a butt joint convex ring is arranged on the bottom end face of the upper nut, and external threads are arranged on the periphery of the butt joint convex ring; the top end of the lower nut is provided with a butt joint ring groove corresponding to the butt joint convex ring, an internal thread is arranged on the outer circumferential wall in the butt joint ring groove, a widening part is integrally formed at the bottom of the lower nut, an annular groove is formed in the bottom of the widening part, and a gasket is bonded in the annular groove; the butt joint convex ring is arranged on the bottom end face of the upper nut, the butt joint annular groove matched with the butt joint convex ring is formed in the top end of the lower nut, threaded connection of the upper nut and the lower nut is achieved, the upper nut and the lower nut are not only in contact fit but are tightly combined together, the stability of the upper nut and the lower nut is greatly enhanced, and the nuts are effectively prevented from loosening.

Description

Technical Field

[0001] The utility model relates to the technical field of nuts, in particular to an anti-loosening nut. Background Art

[0002] The double nut design is commonly used in the nut loosening prevention scheme. By installing two opposite nuts on the bolt, mutual pressure is generated between them, thereby forming a friction force that prevents the nut from loosening. Even if the external load changes, the pressure between the opposite nuts always exists, so it can effectively prevent the nut from loosening.

[0003] The current double nut design has some defects in preventing loosening:

[0004] 1. Although the two nuts are restrained by each other, they are only in contact with each other and not completely combined together, so the stability needs to be improved;

[0005] 2. Since the bottom nut is continuously subjected to force, the contact stability between the bottom nut and the mounting surface is insufficient, which will cause damage to the metal properties of the nut.

[0006] Therefore, we propose an anti-loosening top nut. Utility Model Content

[0007] The purpose of the utility model is to solve the shortcomings existing in the prior art. Although the two nuts restrain each other, they are only in contact and fit together, and are not completely combined together, and the stability needs to be improved; since the bottom nut is continuously subjected to force, the contact stability between the bottom nut and the mounting surface is insufficient, which will cause the metal properties of the nut to be damaged.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] An anti-loosening nut comprises an upper nut and a lower nut, wherein the lower nut and the upper nut are connected to a hexagonal head bolt in sequence, a butt convex ring is provided on the bottom end surface of the upper nut, and an external thread is provided on the periphery of the butt convex ring;

[0010] The top of the lower nut is provided with a docking ring groove corresponding to the docking convex ring, and an internal thread is provided on the outer circumferential wall inside the docking ring groove. The bottom of the lower nut is integrally formed with a widened portion, and an annular groove is provided at the bottom of the widened portion, and a gasket is bonded in the annular groove.

[0011] As a preferred solution of the utility model, the upper nut and the lower nut are respectively a thick nut and a thin nut.

[0012] As a preferred solution of the utility model, threaded holes for hexagonal bolts are provided through the upper nut, the lower nut and the widened portion.

[0013] As a preferred solution of the utility model, the docking protrusion ring and the docking ring groove are threadedly connected by fitting the docking ring groove and the internal thread.

[0014] As a preferred solution of the utility model, the gasket is made of rubber material, and the size of the gasket is smaller than the annular groove and protrudes out of the annular groove.

[0015] As a preferred solution of the utility model, the abutting surfaces of the upper nut and the lower nut are both designed to be flat.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. By providing a docking convex ring on the bottom end surface of the upper nut and providing a docking ring groove matching the docking convex ring on the top end of the lower nut, the threaded connection between the upper nut and the lower nut is achieved, so that the two are no longer just in contact and fit, but are tightly combined together, which greatly enhances the stability between them and effectively prevents the nut from loosening.

[0018] 2. The stress condition of the bottom nut is improved. The one-piece widened part design at the bottom of the lower nut increases the contact area between the bottom nut and the mounting surface, and improves the stability of the installation. At the same time, the rubber gasket bonded in the annular groove arranged at the bottom of the widened part can further buffer and disperse the pressure on the bottom nut, reduce the damage to the metal properties of the nut, and extend the service life of the nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the overall structure of an anti-loosening nut provided by the utility model;

[0020] Figure 2 A schematic diagram of the overall structure of an anti-loosening nut provided by the utility model;

[0021] Figure 3 A schematic diagram of an inverted structure of an upper nut of an anti-loosening nut provided by the utility model;

[0022] Figure 4 The utility model provides a schematic diagram of the inverted structure of the lower nut of an anti-loosening nut.

[0023] Legend: 1. Upper nut; 2. Lower nut; 3. Threaded hole; 11. Docking convex ring; 12. External thread; 21. Docking ring groove; 22. Internal thread; 23. Widened portion; 24. Annular groove; 25. Washer. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant literature, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0026] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items. Example

[0028] like Figure 1-4 As shown, the utility model provides a technical solution: an anti-loosening nut, comprising an upper nut 1 and a lower nut 2, the lower nut 2 and the upper nut 1 are connected to the hexagonal head bolt in sequence, the bottom end surface of the upper nut 1 is provided with a butt convex ring 11, and the outer periphery of the butt convex ring 11 is provided with an external thread 12;

[0029] A docking ring groove 21 is provided at the top of the lower nut 2 corresponding to the docking convex ring 11, and an internal thread 22 is provided on the inner outer circumferential wall of the docking ring groove 21. A widened portion 23 is integrally formed at the bottom of the lower nut 2, and an annular groove 24 is provided at the bottom of the widened portion 23, and a gasket 25 is bonded in the annular groove 24. Example

[0030] like Figure 1-4 As shown, the upper nut 1 and the lower nut 2 are respectively a thick nut and a thin nut, and threaded holes 3 for hexagonal bolts are provided through the upper nut 1, the lower nut 2 and the widened portion 23.

[0031] The butt protruding ring 11 and the butt ring groove 21 are adapted to each other through the butt ring groove 21 and the internal thread 22 and then threadedly connected, so that the upper nut 1 and the lower nut 2 can be tightly combined together.

[0032] The washer 25 is made of rubber. Since the washer 25 is made of rubber, it can fully exert its buffering effect when subjected to pressure, reducing damage to the metal properties of the nut. The washer 25 is smaller than the annular groove 24 and protrudes out of the annular groove 24, so that after the lower nut 2 is tightened, the washer 25 is inserted into the annular groove 24, so that the widened portion 23 contacts the mounting surface, which also ensures that the washer 25 can fully exert its buffering effect when subjected to pressure.

[0033] The butt joint surfaces of the upper nut 1 and the lower nut 2 are both designed to be flat, which can ensure that the nut can move smoothly when rotating and is tightened more tightly.

[0034] The working process of the utility model is as follows: first, ensure that the hexagonal bolt has been placed at the position to be fixed, prepare the upper nut 1 and the lower nut 2, first install the lower nut 2 on the hexagonal bolt, make the threaded hole 3 of the lower nut 2 match the thread of the hexagonal bolt, and then rotate the lower nut 2 until it contacts the mounting surface. At this time, the washer 25 at the bottom of the widened portion 23 is inserted into the annular groove 24, so that the widened portion 23 contacts the mounting surface to form a buffer layer, and then install the upper nut 1 with the hexagonal bolt. During the process, the docking convex ring 11 is aligned with the docking ring groove 21 of the lower nut 2. Since the outer periphery of the docking convex ring 11 is provided with an outer Thread 12, and an internal thread 22 is provided on the inner outer circumferential wall of the docking ring groove 21, and it is threadedly connected with the lower nut 2. Since the docking surface is flat, the upper nut 1 can rotate smoothly and be tightly connected to the lower nut 2. Continue to rotate the upper nut 1 to move it downward and press the lower nut 2. Due to the threaded connection between the upper nut 1 and the lower nut 2, the two will be tightly combined together to form a friction force that prevents the nut from loosening. At the same time, the washer 25 between the widened portion 23 of the lower nut 2 and the mounting surface will be compressed and deformed, further increasing the contact area and friction with the mounting surface, and improving the stability of the installation.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-loosening nut, comprising an upper nut (1) and a lower nut (2), wherein the lower nut (2) and the upper nut (1) are sequentially connected to a hexagonal head bolt, characterized in that: The bottom end surface of the upper nut (1) is provided with a butt-jointing convex ring (11), and the periphery of the butt-jointing convex ring (11) is provided with an external thread (12); A docking annular groove (21) is provided at the top end of the lower nut (2) corresponding to the docking convex ring (11), and an internal thread (22) is provided on the inner outer circumferential wall of the docking annular groove (21). A widened portion (23) is integrally formed at the bottom of the lower nut (2), and an annular groove (24) is provided at the bottom of the widened portion (23), and a washer (25) is bonded in the annular groove (24).

2. The anti-loosening nut according to claim 1, characterized in that: The upper nut (1) and the lower nut (2) are respectively a thick nut and a thin nut.

3. The anti-loosening nut according to claim 1, characterized in that: The upper nut (1), the lower nut (2) and the widened portion (23) are provided with threaded holes (3) for hexagonal bolts.

4. The anti-loosening nut according to claim 1, characterized in that: The butt joint convex ring (11) and the butt joint ring groove (21) are threadedly connected through the butt joint ring groove (21) and the internal thread (22).

5. The anti-loosening nut according to claim 1, characterized in that: The gasket (25) is made of rubber, and the size of the gasket (25) is smaller than the annular groove (24) and protrudes out of the annular groove (24).

6. The anti-loosening nut according to claim 1, characterized in that: The butt joint surfaces of the upper nut (1) and the lower nut (2) are both designed to be flat.

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