Anti-loosening double-nut assembly

Abstract

The anti-loosening double-nut assembly comprises a first nut and a second nut, the first nut comprises a first nut body, a groove is upwards formed in the middle of the lower end face of the first nut body, a through groove is upwards formed in the middle of the groove bottom of the groove, and a fixing groove is upwards obliquely formed in the side, away from the through groove, of the groove bottom of the groove; the second nut comprises a second nut body, a second through groove is downwards formed in the middle of the upper end face of the second nut body, second threads are formed in the groove wall of the second through groove, an annular limiting plate is upwards arranged on the upper end face of the second nut body, and the limiting plate abuts against the limiting piece. The fixing groove and the limiting piece are arranged, so that the limiting piece further abuts against the bolt, and the stability of connection of the bolt and the nut is guaranteed; meanwhile, the limiting piece is limited by the other nut, the two sets of nuts improve the connection stability, meanwhile, the arrangement stability of the limiting piece is improved, and therefore the whole nut has the high anti-loosening performance.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, specifically to an anti-loosening double nut assembly. Background Technology

[0002] Nuts are common fasteners, usually used in conjunction with bolts. They rely on threaded connections for fastening during use. However, under long-term vibration conditions, the connection between the nut and bolt may loosen. To ensure the tightness of the connection, a washer is usually added between the nut and the object being fastened, or a groove is cut into the nut with friction elements placed inside to increase thread friction. However, cutting grooves into the nut and installing friction elements requires other limiting components to limit the friction elements and ensure their stable operation. Setting up limiting components to work with friction elements also results in a complex component structure. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of the aforementioned background technology by providing a double-nut assembly with a simple structure and good stability when connected to bolts.

[0004] To achieve the above objectives, this utility model provides an anti-loosening double nut assembly, which adopts the following technical solution:

[0005] A double-nut anti-loosening assembly includes a first nut and a second nut. The first nut includes a first nut body with a groove at the center of its lower end face, a through groove at the center of the bottom of the groove, and threads on the groove wall. The bottom of the groove also has a fixing groove at an upward angle away from the through groove. A limiting member is inserted into the fixing groove, and a friction texture is provided at the end of the limiting member away from the fixing groove. The friction texture is used to tighten the bolt. The second nut includes a second nut body with a second through groove at the center of its upper end face, and a second thread on the groove wall. An annular limiting plate is provided at the upper end face of the second nut body, which abuts against the limiting member.

[0006] A further improvement of this utility model of a double-nut anti-loosening assembly is that the upper end face of the nut body is provided with an annular plate structure that is the same as the upper end face of the second nut body, and the lower end face of the second nut body is provided with the same groove and fixing groove structure that is provided on the lower end face of the first nut body.

[0007] A further improvement of this utility model of an anti-loosening double nut assembly is that at least four sets of fixing grooves are provided, which are arranged circumferentially on the groove.

[0008] A further improvement of this utility model of an anti-loosening double nut assembly is that a pad is provided on the outer periphery of the limiting plate provided on the upper end face of the first nut body, the height of the pad is the same as the height of the limiting plate, and the upper end face of the pad is provided with anti-slip texture.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] This utility model achieves further tightening of the bolt by setting a fixing groove and a limiting component, thus ensuring the stability of the bolt-nut connection. At the same time, the limiting component is limited by another nut. The two sets of nuts not only increase the connection stability but also increase the stability of the limiting component's arrangement, thereby giving the overall nut a high anti-loosening performance. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] In the figure: 1 First nut body, 2 Second nut body, 3 Groove, 4 Through groove, 5 Fixing groove, 6 Limiting component, 7 Second through groove, 8 Limiting plate. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] like Figure 1 As shown, an anti-loosening double nut assembly includes a first nut and a second nut. The first nut includes a first nut body 1, with a groove 3 at the center of the lower end face of the first nut body, a through groove 4 at the center of the bottom of the groove, and threads on the wall of the through groove. The bottom of the groove also has a fixing groove 5 at an upward and away from the through groove. A limiting member 6 is inserted in the fixing groove. The end of the limiting member away from the fixing groove has friction texture, which is used to tighten the bolt. The limiting member has a certain degree of plasticity. The second nut includes a second nut body 2, with a second through groove 7 at the center of the upper end face of the second nut body, and a second thread on the wall of the second through groove. An annular limiting plate 8 is provided at the upper end face of the second nut body, which abuts against the limiting member.

[0015] Furthermore, the upper surface of the first nut body has an annular plate structure identical to that of the upper surface of the second nut body, and the lower surface of the second nut body has an upward-facing groove and fixing slot structure identical to those on the lower surface of the first nut body. That is, the first and second nuts have identical structures, ensuring production efficiency and cost-effectiveness during nut manufacturing.

[0016] There are at least four sets of fixing grooves, which are arranged circumferentially on the groove.

[0017] Furthermore, a pad is provided on the outer periphery of the limiting plate on the upper end face of the first nut body. The height of the pad is the same as that of the limiting plate, and the upper end face of the pad is provided with anti-slip texture.

[0018] The working principle of this utility model is as follows: the pad is placed above the first nut, the limiting member is placed in the fixing groove, and then the first nut is screwed with the bolt. After the first nut is screwed in, the second nut is screwed in. When the second nut is in place, the limiting plate abuts against the limiting member, so that the limiting member abuts against the bolt, thereby achieving a stable connection.

[0019] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A double-nut anti-loosening assembly, characterized in that: The device includes a first nut and a second nut. The first nut includes a first nut body. The lower end face of the first nut body has an upward-facing groove. The bottom of the groove has an upward-facing through groove. The through groove wall is threaded. The bottom of the groove also has a fixing groove that is inclined upward and away from the through groove. A limiting member is inserted in the fixing groove. The end of the limiting member away from the fixing groove has friction textures for tightening the bolt. The second nut includes a second nut body. The upper end face of the second nut body has a downward-facing second through groove. The through groove wall is threaded. The upper end face of the second nut body has an annular limiting plate that abuts against the limiting member.

2. The anti-loosening double nut assembly according to claim 1, characterized in that: The upper end face of the first nut body is provided with an annular plate structure that is the same as the upper end face of the second nut body, and the lower end face of the second nut body is provided with the same groove and fixing groove structure that is provided on the lower end face of the first nut body.

3. The anti-loosening double nut assembly according to claim 2, characterized in that: The fixing groove is provided in at least four sets, which are arranged circumferentially on the groove.

4. The anti-loosening double nut assembly according to claim 3, characterized in that: The upper end face of the first nut body is provided with a limiting plate with a pad on its outer periphery. The height of the pad is the same as that of the limiting plate, and the upper end face of the pad is provided with anti-slip texture.

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