Bolt and nut fastener with anti-loosening function

Abstract

The utility model discloses a bolt and nut fastener with an anti-loosening function, comprising a bolt body and a nut body, a fixing groove is upwardly provided at the middle of the lower end face of the bolt rod of the bolt body, two groups of through grooves that penetrate inside and outside the fixing groove are provided on the groove wall of the fixing groove, an embedding groove is provided on the nut body, a pad is inserted in the embedding groove, a long strip-shaped positioning groove is provided from the center to the edge of the upper end face of the pad, an extension groove is provided on the bottom of the positioning groove to both sides, two groups of positioning grooves are provided, the two groups of positioning grooves are centrally symmetrical relative to the center of the upper end face of the pad, a limiting plate is passed through the extension groove, the limiting plate passes through the two through grooves, an elastic pad is provided in the positioning groove, and the elastic pad abuts against the limiting plate. The utility model adds a pad, cooperates with the limiting plate, realizes the limit between the bolt and the nut, prevents the possibility of the two rotating relative to each other and becoming loose, and improves the connection stability; at the same time, reduces the structural modification on the bolt and nut body, simplifies the structure, and improves the production efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a bolt and nut fastener with an anti-loosening function. Background Art

[0002] Bolts and nuts are one of the more common fasteners. When used, bolt and nut fasteners generally connect at least two fastened objects. When the nut is screwed to the bolt, there is a gap between the nut and the fastened object. At the same time, under vibration conditions, the connection between the nut and the bolt becomes loose, which in turn causes the gap to increase, resulting in a problem of reduced fastening effect. In order to solve the above problems, the existing utility model patent with patent number 202321781379.5 discloses a bolt and nut fastener with an anti-loosening and falling-off function, which adds a snap-fit ​​groove, and shoots a snap-fit ​​rod in the snap-fit ​​groove to resist the nut to prevent the nut from loosening, and at the same time cooperates with the support frame and the extrusion block to be inserted into the installation groove to further increase the anti-loosening performance. However, the snap-fit ​​groove structure in the above structure is complex and is opened at the bottom of the bolt, which affects production efficiency. At the same time, there is also the problem that the installation groove opened in the fastened object is fully adapted to the support frame and cannot be operated conveniently. Utility Model Content

[0003] The utility model aims to provide a bolt and nut fastener with an easy-to-produce structure and guaranteed anti-loosening performance in view of the deficiencies in the above-mentioned background technology.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a bolt and nut fastener with an anti-loosening function, which adopts the following technical solutions:

[0005] A bolt and nut fastener with an anti-loosening function comprises a bolt body and a nut body, the bolt body comprises a bolt end and a bolt rod, a fixing groove is provided upwardly in the middle of the lower end surface of the bolt rod, and two opposite groups of through grooves that penetrate inside and outside the fixing groove are provided on the groove wall of the fixing groove, an annular embedding groove is provided downwardly on the upper end surface of the nut body, a pad is inserted in the embedding groove, the pad is cylindrical, and a long strip positioning groove is provided on the upper end surface of the pad from the center to the edge, and an extension groove is provided on both sides of the groove bottom of the positioning groove, and the positioning groove is provided with two groups, and the two groups of positioning grooves are centrally symmetrical with respect to the center of the upper end surface of the pad, a limit plate is passed through the extension groove, and the limit plate passes through the two through grooves, and an elastic pad is provided in the positioning groove, and the elastic pad is against the limit plate.

[0006] A further improvement of the bolt and nut fastener with an anti-loosening function of the utility model is that the embedding groove and the threaded portion of the nut body are eccentrically arranged.

[0007] A further improvement of the bolt and nut fastener with an anti-loosening function of the utility model is that the elastic pad protrudes from the upper end surface of the pad.

[0008] A further improvement of the bolt and nut fastener with an anti-loosening function of the utility model is that the two groups of positioning grooves form an accommodating portion, and the accommodating portion is provided with at least four.

[0009] A further improvement of the bolt and nut fastener with an anti-loosening function of the utility model is that the limiting plate is clamped in the extension groove on one side.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The utility model adds a pad, which cooperates with the limiting plate to achieve the limitation between the bolt and the nut, prevents the two from rotating relative to each other and becoming loose, and improves the stability of the connection; at the same time, reduces the structural modification on the bolt and nut body, simplifies the structure, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] In the figure: 1 bolt end, 2 bolt rod, 3 through slot, 4 nut body, 5 embedded slot, 6 pad, 7 extension slot, 8 elastic pad. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] like Figure 1 As shown, a bolt and nut fastener with an anti-loosening function comprises a bolt body and a nut body 4, the bolt body comprises a bolt end 1 and a bolt rod 2, a fixing groove is provided upwardly from the middle of the lower end surface of the bolt rod, and two opposite groups of through grooves 3 penetrating inside and outside the fixing groove are provided on the groove wall of the fixing groove, an annular embedding groove 5 is provided downwardly on the upper end surface of the nut body, a pad 6 is inserted in the embedding groove, the pad is cylindrical, a long strip positioning groove is provided from the center to the edge on the upper end surface of the pad, and an extended groove 7 is provided on both sides of the groove bottom of the positioning groove, there are two groups of positioning grooves, the two groups of positioning grooves are centrally symmetrical with respect to the center of the upper end surface of the pad, a limiting plate is passed through the extended groove, the limiting plate passes through the two through grooves, an elastic pad 8 is provided in the positioning groove, and the elastic pad presses against the limiting plate.

[0016] The embedding groove is eccentrically arranged with the threaded portion of the nut body, so as to ensure that the backing plate and the nut form a whole.

[0017] The elastic pad protrudes from the upper end surface of the pad. The elastic pad can also play the role of a bulge, increasing the friction between the pad and the fastened object and improving the anti-loosening effect.

[0018] Furthermore, the two groups of positioning grooves form an accommodating portion, and the accommodating portion is provided with at least four accommodating portions, so that the installation of the limit plate can be realized by only fine-tuning after the nut body is rotated into place, that is, the fastening connection is ensured while the limit installation is also ensured.

[0019] The limit plate is clamped in the extension groove on one side to achieve stable fixation of the limit plate.

[0020] The working principle of the utility model is as follows: insert the pad into the nut body, arrange the elastic pad in all the positioning grooves, screw the nut, and after it is in place, insert the limit plate into the extension groove, and have the elastic pad to resist the limit to ensure that the limit plate passes through the two through grooves. During operation, if the bolt rod interferes with the insertion of the limit plate, the nut is rotated at most one eighth of a circle, so that the limit cannot pass through the through groove and the fixed groove through the extension groove, thereby realizing the nut and the bolt through the limit plate to enhance the limit, prevent relative rotation, and improve the anti-loosening performance.

[0021] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A bolt and nut fastener with anti-loosening function, characterized in that: The invention comprises a bolt body and a nut body, wherein the bolt body comprises a bolt end and a bolt rod, a fixing groove is provided upwardly in the middle of the lower end surface of the bolt rod, and two opposite through grooves are provided on the groove wall of the fixing groove, which penetrate inside and outside the fixing groove, and an annular embedding groove is provided downwardly on the upper end surface of the nut body, and a pad is inserted in the embedding groove, and the pad is cylindrical, and a long strip-shaped positioning groove is provided on the upper end surface of the pad from the center to the edge, and an extension groove is provided on both sides of the groove bottom of the positioning groove, and the positioning groove is provided with two groups, and the two groups of positioning grooves are centrally symmetrical with respect to the center of the upper end surface of the pad, a limiting plate is passed through the extension groove, and the limiting plate passes through the two through grooves, and an elastic pad is provided in the positioning groove, and the elastic pad is against the limiting plate.

2. A bolt and nut fastener with anti-loosening function according to claim 1, characterized in that: The embedding groove is eccentrically arranged with respect to the threaded portion of the nut body.

3. The bolt and nut fastener with anti-loosening function according to claim 1, characterized in that: The elastic pad protrudes from the upper end surface of the pad.

4. The bolt and nut fastener with anti-loosening function according to claim 3, characterized in that: The two groups of positioning grooves form a receiving portion, and the receiving portion is provided with at least four.

5. The bolt and nut fastener with anti-loosening function according to claim 4, characterized in that: The limiting plate is clamped in the extension groove on one side.

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