Self-locking nut

Abstract

The utility model provides a self-locking nut which comprises a nut body and a retainer. The nut body is mounted above the retainer; the nut body comprises a supporting plate and a hollow column body. The column body is mounted above the supporting plate; a threaded hole is formed in the column body; a plurality of arc-shaped bulges are arranged at the top of the column body; the retainer comprises a base and a spring arm; the base is mounted below the supporting plate; the spring arms are arranged on the two sides of the base. A groove matched with the bulge is formed in the top of the spring arm; a hole communicated with the threaded hole of the column body is formed in the center of the base; a positioning column is arranged beside the hole in the center of the base; the four bulges are uniformly distributed at the top of the column body; the spring arm is made of an elastic metal material; different materials and different properties can be applied to a metal plate base body with a slender and rectangular opening so as to meet the requirement for use in different environments, the structure is simple, and use is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of fasteners, and in particular relates to a self-locking nut. Background Art

[0002] In the case of static load and little change in working temperature, the loosening torque between threads of traditional threaded connections is less than the self-locking torque, and generally no anti-loosening measures are needed to prevent the threads from loosening. However, under some high temperature, vibration, impact and other changing conditions, traditional threaded connections have potential failures such as gradual attenuation of preload, loosening, and fracture; the most fundamental element of anti-loosening of fasteners is to prevent the relative displacement or rotation of fasteners after being subjected to impact loads. In order to ensure the effectiveness of the preload when the fastener connection is loaded, the main anti-loosening methods commonly used in engineering are as follows: 1. Increase the friction of the connection to prevent the connection failure caused by the decrease of preload; 2. Change the bolt connection structure or add a locking structure to reduce the impact on the overall structure and reduce the impact on the decrease of bolt preload; 3. Eliminate the relative displacement or rotation between the bolt and the nut caused by the impact of vibration loads; Currently, there is a lack of self-locking nuts installed on sheet metal substrates with slender, rectangular openings. Utility Model Content

[0003] In view of the above problems, the purpose of the utility model is to provide a self-locking nut having a sheet metal substrate with an elongated rectangular opening, to which different materials and different properties can be applied to meet the needs of use in different environments.

[0004] The utility model is realized by the following technical solutions:

[0005] A self-locking nut comprises a nut body and a retaining frame; the nut body is installed above the retaining frame; the nut body comprises: a support plate and a hollow cylinder; the cylinder is installed above the support plate; a threaded hole is arranged inside the cylinder; a plurality of arc-shaped protrusions are arranged on the top of the cylinder; the retaining frame comprises a base and a spring arm; the base is installed below the support plate; the spring arms are arranged on both sides of the base; a groove matching the protrusion is arranged on the top of the spring arm; a hole connected to the threaded hole of the cylinder is arranged in the center of the base; a positioning column is arranged next to the hole in the center of the base; there are four protrusions evenly distributed on the top of the cylinder; the spring arm is made of elastic metal material.

[0006] Beneficial effects of the utility model:

[0007] The utility model can apply different materials and different properties to a sheet metal substrate with an elongated rectangular opening to meet the use in different environments, has a simple structure and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0009] Figure 1 It is a structural schematic diagram of the utility model.

[0010] Figure 2 It is a structural schematic diagram of the nut body of the utility model.

[0011] Figure 3 It is a structural schematic diagram of the retaining frame of the utility model.

[0012] Figure 4 It is a working schematic diagram of the utility model.

[0013] As shown in the figure: 1-nut body; 2-cage; 3-sheet metal base; 11-support plate; 12-column; 13-protrusion; 21-base; 22-spring arm; 23-positioning column. DETAILED DESCRIPTION

[0014] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0015] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantial change of the technical content.

[0016] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. It should be noted that the terms "include", "comprise" or any other variants are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0017] like Figure 1-Figure 3 The self-locking nut shown comprises a nut body 1 and a retaining frame 2 .

[0018] The nut body 1 is installed above the retaining frame 2; the nut body 1 comprises: a support plate 11 and a hollow column 12; the column 12 is installed above the support plate 11; a threaded hole is provided inside the column 12 for connection with a bolt; four protrusions 13 are provided on the top of the column 12, which are evenly distributed on the top of the column 12 and are used to connect with the retaining frame;

[0019] The retaining frame 2 includes a base 21 and a spring arm 22; the base 21 is installed under the support plate 11; the spring arm 22 is made of elastic metal material, and the spring arm 22 is arranged on both sides of the base 21; the top of the spring arm 22 is provided with a groove matching the protrusion 13; the center of the base 21 is provided with a hole connected to the threaded hole of the column 12; a positioning column 23 is provided next to the hole in the center of the base 21, which is used to fix the nut body 1 in the retaining frame 2.

[0020] Working principle:

[0021] like Figure 4 As shown, the retaining frame 2 is passed through the hole at the bottom of the sheet metal base 3, the spring arm 22 extends out from the upper surface of the sheet metal base 3, and its base 21 is stuck on the lower surface of the sheet metal base 3. Then the spring arm 22 is pried open and the nut body 1 is placed therein. The positioning column 23 supports the nut body 1 at a position where the spring arm 22 matches the protrusion 13 on the top of the column 12. The screw is threadedly connected to the nut body 1, and the spring arm 22 is stuck with the protrusion 13 on the top of the column 12 to achieve the purpose of self-locking.

[0022] The protection scope of the present utility model is not limited to the technical solutions disclosed in the specific implementation methods. Any modifications, equivalent replacements, improvements, etc. made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A self-locking nut, characterized in that: It comprises a nut body (1) and a retaining frame (2); the nut body (1) is mounted above the retaining frame (2); The nut body (1) comprises: a support plate (11) and a hollow column (12); the column (12) is mounted above the support plate (11); a threaded hole is arranged inside the column (12); a plurality of arc-shaped protrusions (13) are arranged on the top of the column (12); the retaining frame (2) comprises a base (21) and a spring arm (22); the base (21) is mounted below the support plate (11); the spring arm (22) is arranged on both sides of the base (21); a groove matching the protrusion (13) is arranged on the top of the spring arm (22); a hole communicating with the threaded hole of the column (12) is arranged in the center of the base (21); and a positioning column (23) is arranged next to the hole in the center of the base (21).

2. A self-locking nut according to claim 1, characterized in that There are four protrusions (13) evenly distributed on the top of the column (12).

3. A self-locking nut according to claim 1, characterized in that The spring arm (22) is made of elastic metal material.

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