Anti-falling welding nut

Abstract

The utility model relates to the technical field of welding nuts, in particular to an anti-falling welding nut, which improves the connection firmness and stability between the welding nut and a welding main body. The nut specifically comprises a nut body, a through hole is formed in the nut body, and a plurality of welding points are arranged on the end face of the nut body. The nut body and the welding body are assembled through the welding points, and a mounting cavity communicating with the through hole is formed in the welding body. And the limiting piece is connected with the nut body, is arranged in the mounting cavity, is in clearance fit with the mounting cavity, and is used for limiting and fixing the nut body in the mounting cavity. According to the welding nut, the corresponding limiting piece is arranged on the nut body, so that when the welding nut is welded to a welding main body, further fixing and limiting can be conducted through the limiting piece, and the situation that when the welding position of the welding nut and the welding main body is affected by external force factors, loosening or falling off occurs, and assembling operation is affected is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to welding nut technical field, especially a kind of anti-falling welding nut. BACKGROUND

[0002] The application field of welding nut is wide. Generally, welding nut and welding main body are welded, and spot welding is mainly used. However, the anti-external force capacity of spot welding is relatively weak. Once vibrated or externally prying, the welding nut and the welding main body are prone to loosen or even fall off, affecting assembly operation. UTILITY MODEL CONTENT

[0003] The utility model aims at providing a kind of anti-falling welding nut, which improves the connection firmness and stability between welding nut and welding main body.

[0004] To achieve the above-mentioned purpose, the utility model adopts the technical scheme that:

[0005] The utility model provides a kind of anti-falling welding nut, comprising:

[0006] Nut body, a through hole is formed in the nut body; a plurality of welding points are provided on the end face of the nut body; the nut body is assembled with the welding main body through the welding points; an installation cavity is formed in the welding main body and communicates with the through hole;

[0007] Limiting piece, the limiting piece is connected with the nut body, and the limiting piece is arranged in the installation cavity and gap fits with the installation cavity, and the limiting piece is used to limit and fix the nut body in the installation cavity.

[0008] Further, the limiting piece includes an extension ring arranged along the axial direction of the through hole.

[0009] Further, the outer diameter of the extension ring gap fits with the inner diameter of the installation cavity.

[0010] Further, the nut body includes a connecting portion and a welding portion, the outer diameter of the welding portion is greater than the outer diameter of the connecting portion, and the welding points are formed on the lower end face of the welding portion.

[0011] Further, the limiting piece includes a limiting column arranged along the axial direction of the through hole, and an auxiliary limiting piece is arranged on the limiting column.

[0012] Further, the limiting column is provided with several.

[0013] Further, the auxiliary limiting piece is a steel ball, and a steel ball blind hole is formed on the outer side of the limiting column for the steel ball to protrude or retreat.

[0014] Further, the hole diameter of the steel ball blind hole is adapted to the diameter of the steel ball.

[0015] Further, the auxiliary limiting member is a protruding block arranged at the bottom end of the limiting column.

[0016] Thanks to the above technical scheme, the present application has the following advantages over the prior art:

[0017] The anti-falling welding nut has the limiting member arranged on the nut body, so that the welding nut can be further fixed and limited by the limiting member when being welded with the welding body, and the welding nut and the welding body are prevented from loosening or falling off due to external force, thereby affecting the assembly operation. BRIEF DESCRIPTION OF DRAWINGS

[0018] Some specific embodiments of the present application will be described in detail hereinafter with reference to the accompanying drawings in an exemplary and non-limiting manner. The same reference signs in the drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that the drawings are not necessarily drawn to scale. In the drawings:

[0019] Figure 1 is a structural schematic view of the welding nut in the prior art provided by the present application;

[0020] Figure 2 is a structural schematic view of the anti-falling welding nut provided by the present application;

[0021] Figure 3 is a structural schematic view of the anti-falling welding nut provided by the present application;

[0022] Figure 4 is a planar schematic view of the anti-falling welding nut provided by the present application;

[0023] Figure 5 is a planar schematic view of the anti-falling welding nut provided by the present application;

[0024] In the drawings, the reference signs are explained as follows:

[0025] 1, nut body; 101, through hole; 102, connecting part; 103, welding part; 1030, welding point; 2, extension ring; 3, limiting column; 4, auxiliary limiting member; 5, mounting cavity. DETAILED DESCRIPTION

[0026] The technical solutions of the utility model will be described clearly and completely in connection with the drawings below, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the protection scope of the utility model.

[0027] Referring to Figure 2 and Figure 3 The anti-falling welded nut in the utility model comprises a nut body 1 and a limiting piece. A through hole 101 is formed in the nut body 1, and an internal thread is arranged on the inner wall of the through hole 101. The through hole 101 is arranged for mounting a fitting. The nut body 1 comprises a connecting portion 102 (i.e. the upper half of the nut body 1) and a welding portion 103 (i.e. the lower half of the nut body 1), and the outer diameter of the welding portion 103 is greater than that of the connecting portion 102. Moreover, the outer edge of the welding portion 103 is square-shaped, which is convenient for a wrench to hold when the fitting is mounted on the nut body 1.

[0028] A plurality of welding points 1030 are arranged on the end surface of the nut body 1 in contact with the welding body, and the nut body 1 is welded and assembled with the welding body through the welding points 1030. In the embodiment, the welding points 1030 are located at the four corners of the nut body 1, i.e. Figure 2 A.

[0029] An installation cavity 5 is further formed in the welding body and is in communication with the through hole 101 of the nut body 1. The limiting piece is connected with the nut body 1 and is arranged in the installation cavity 5, and the limiting piece is in clearance fit with the installation cavity 5, so as to limit and fix the nut body 1 in the installation cavity 5. After the nut body 1 and the welding body are completely welded, the nut body 1 and the welding body can be further stably connected through the limiting piece.

[0030] Compared with the structure of the welded nut in the prior art shown in Figure 1 When the welded nut in the prior art is welded and docked with the welding body, only the end surface and the end surface can be docked, and there is no corresponding supporting point at the connecting position of the welded nut and the welding body. Therefore, when the two are welded, only spot welding is performed at the connecting position of the end surfaces of the two. As a result, the firmness of the welding position of the welded nut and the welding body is relatively weak, and the resistance to external force is weak.

[0031] Embodiment 1

[0032] Referring to Figure 2 and Figure 3In the embodiment of the utility model, the limiting piece is an extension ring 2 arranged along the axial direction of the through hole 101. By arranging an extension ring 2 at the connecting position of the nut body 1 and the welding body, the extension ring 2 is matched with the mounting cavity 5 of the welding body in a clearance fit, so that when the nut body 1 and the welding body are welded and assembled, the spot welding position will not be loosened or detached due to external force.

[0033] In the embodiment, when the extension ring 2 is matched with the mounting cavity 5 of the welding body in a clearance fit, the overlap amount of the extension ring 2 and the mounting cavity 5 is controlled to be 2 mm. Of course, the overlap amount of the extension ring 2 can be adjusted adaptively according to actual production needs and the size of the mounting cavity 5 of the welding body.

[0034] Embodiment 2

[0035] Referring to Figure 4 In another embodiment of the utility model, the limiting piece is a limiting column 3 arranged along the axial direction of the through hole 101, and the limiting column 3 is arranged at intervals along the circumferential direction of the through hole 101. The number of the limiting column 3 can be adjusted according to actual needs. In this example, an auxiliary limiting piece 4 is arranged on the limiting column 3 synchronously, and the auxiliary limiting piece 4 is matched with the limiting column 3 to realize the stable limiting connection of the nut body 1 and the welding body.

[0036] For the auxiliary limiting piece 4, a steel ball can be arranged, and a steel ball blind hole is arranged on the outer side of the limiting column 3 (that is, the side of the limiting column 3 facing the mounting cavity 5 of the welding body) to expose or retract the steel ball. The hole diameter of the steel ball blind hole is adapted to the diameter of the steel ball, and the number of the steel ball blind hole is consistent with the number of the steel ball.

[0037] When the nut body 1 provided with the limiting column 3 is inserted into the mounting cavity 5 of the welding body, the limiting column 3 and the inner wall of the mounting cavity 5 are clamped by the steel ball due to the extrusion of the inner wall of the cavity, so as to support the limiting column 3 on the inner wall of the mounting cavity.

[0038] Embodiment 3

[0039] Referring to Figure 5 In another embodiment of the utility model, the auxiliary limiting piece 4 is arranged as a protruding block, and the protruding block is arranged at the bottom end of the limiting column 3. The protruding block protrudes from the bottom end of the limiting column 3. The limiting column 3 is clamped with the inner wall of the mounting cavity 5 of the welding body through the protruding block, and then the limiting column 3 is supported on the inner wall of the mounting cavity 5.

[0040] Of course, the auxiliary limiting piece 4 can also be arranged on the outer periphery of the aforementioned extension ring 2, as long as the mode of stably connecting the nut body 1 and the welding body is covered in the protection scope of the utility model.

[0041] In summary, the anti-falling welding nut is disclosed in the utility model, through setting corresponding limit pieces on the nut body 1 of the welding nut, so that the welding nut can be further fixed and limited by the limit pieces when being welded with the welding main body, so that the welding nut and the welding main body are prevented from being loose or falling off when being affected by external force factors, and the assembly operation is affected.

[0042] In addition, the auxiliary limit pieces are arranged on the limit pieces, so that the limit pieces are supported on the inner wall of the mounting cavity of the welding main body, and then the welding nut and the welding main body are stably connected. The design is ingenious, the structure is simple, and the adaptability is high.

[0043] The above examples are only for illustrating the technical concept and characteristics of the utility model, the purpose is to enable the person skilled in the art to understand the content of the utility model and to implement it, and it cannot limit the protection scope of the utility model, and equivalent changes or modifications made according to the spirit and essence of the utility model should be covered in the protection scope of the utility model.

Claims

1. An anti -fall off welded nut, characterized by, Include: The nut body (1) is provided with a through hole (101) in the nut body (1), a plurality of welding points (1030) are arranged on the end face of the nut body (1), the nut body (1) is assembled with the welding main body through the welding point (1030), and the welding main body is provided with a mounting cavity (5) communicated with the through hole (101); The limiting piece is connected with the nut body (1), and the limiting piece is arranged in the mounting cavity (5) and gap fits with the mounting cavity (5), and the limiting piece is used for limiting and fixing the nut body (1) in the mounting cavity (5).

2. A fall-preventing welded nut according to claim 1, characterized in that The limiting piece includes an extension ring (2) arranged along the axial direction of the through hole (101).

3. A captive nut according to claim 2, wherein, The outer diameter of the extension ring (2) gap fits with the inner diameter of the mounting cavity (5).

4. The anti-drop welded nut according to claim 1, wherein The nut body (1) includes a connecting part (102) and a welding part (103), the outer diameter of the welding part (103) is greater than the outer diameter of the connecting part (102), and the welding point (1030) is formed on the lower end face of the welding part (103).

5. The anti-drop welded nut of claim 1, wherein The limiting piece includes a limiting column (3) arranged along the axial direction of the through hole (101), and an auxiliary limiting piece (4) is arranged on the limiting column (3).

6. A captive nut according to claim 5, wherein, The limiting column (3) is provided with a plurality of.

7. A captive nut according to claim 6, wherein, The auxiliary limiting piece (4) is a steel ball, and a steel ball blind hole is arranged on the outer side of the limiting column (3) for exposing or retreating the steel ball.

8. A captive nut according to claim 7, wherein, The hole diameter of the steel ball blind hole is adapted to the diameter of the steel ball.

9. The anti-drop welded nut of claim 6, wherein The auxiliary limiting piece (4) is a protruding block, and the protruding block is arranged at the bottom end of the limiting column (3).

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