Pressing rivet nut

Abstract

The utility model provides a pressing rivet nut, which belongs to the technical field of nuts and comprises a nut body. A through hole penetrating through the nut body is formed in the nut body, and threads are formed in the inner wall of the through hole. The thread extends from the first end of the nut main body to the second end of the nut main body; a flange is arranged at the second end of the nut main body; the flange is provided with a groove corresponding to the through hole; a sealing cover is arranged in the groove; and the sealing cover seals the port of the through hole and is fixedly connected with the flange. The nut is made into a through hole, after threads are tapped through, one end of the through hole is sealed in a sealing cover mode, injection molding materials are prevented from being injected into the screw hole, and meanwhile effective threads are guaranteed under the condition that the total length of the nut is limited. And the nut is fixed in a manner of cold heading first and then capping, so that effective threads can be ensured, and the electroplating quality in the hole can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of nuts, in particular to a pressure riveted nut. Background Art

[0002] The finished rivet nuts used for air suspension components in the automotive industry are pressed onto aluminum parts and then delivered to end customers after being injection molded and coated. Because the product needs to be injection molded, it must be ensured that glue cannot be poured into the threaded hole, and the effective thread length must be guaranteed. The total length of the rivet nut product is 25mm, and the effective tooth length is required to be 23mm, which cannot be achieved in the current cold heading process. The reason is that the traditional manufacturing method can only cold head blind holes. When processing the internal hole thread (tapping), there are 2-3 circles of guide teeth at the front end of the cutting tap, that is, the processed product has 2-3 circles of invalid teeth, and the customer cannot actually install and use the bolts to tighten to the bottom. To this end, the utility model provides a new type of rivet nut. Utility Model Content

[0003] The utility model aims to provide a self-clinching nut.

[0004] In order to solve the above technical problems, the purpose of the utility model is achieved as follows:

[0005] A self-clinching nut, comprising: a nut body; the nut body is provided with a through hole penetrating the nut body, and a thread is provided on the inner wall of the through hole; the thread extends from a first end of the nut body to a second end of the nut body;

[0006] A flange is provided at the second end of the nut body; a groove is provided in the flange corresponding to the through hole; a cover is provided in the groove; the cover closes the through hole port and is fixedly connected to the flange.

[0007] On the basis of the above scheme and as a preferred scheme of the above scheme, the groove is circular and arranged concentrically with the through hole; the sealing cover is circular and matched with the groove.

[0008] On the basis of the above solution and as a preferred solution of the above solution, the cover is extruded and fixedly connected to the flange by stamping deformation.

[0009] On the basis of the above solution and as a preferred solution of the above solution, a chamfer is provided on the first end of the nut body.

[0010] On the basis of the above solution and as a preferred solution of the above solution, a plurality of evenly distributed ribs are provided on the outer peripheral surface of the nut body.

[0011] On the basis of the above scheme and as a preferred scheme of the above scheme, the rib extends from the middle of the nut body to the flange, and a pointed structure is provided at the first end, and the second end is connected to the first surface of the flange.

[0012] On the basis of the above solution and as a preferred solution of the above solution, a plurality of latching teeth are evenly arranged along the circumference of the first surface of the flange; the latching teeth are located between two adjacent ribs.

[0013] On the basis of the above scheme and as a preferred scheme of the above scheme, the latch tooth has a triangular structure, the first side and the second side of the triangular structure are respectively fixedly connected to the first surface of the flange and the outer peripheral surface of the nut body, and the width of the latch tooth gradually narrows from the first side and the second side of the triangular structure to the third side.

[0014] The beneficial effects of the utility model are:

[0015] 1. The nut is made into a through hole. After the thread is tapped, a capping method is used to close one end of the through hole to prevent the injection of plastic glue into the screw hole. At the same time, effective thread patterns are guaranteed while limiting the total length of the nut. The nut is fixed by cold heading first and then capping, which can ensure both effective threads and the quality of electroplating in the hole.

[0016] 2. In order to ensure the firmness of the cap, the cap is fixed by stamping deformation, so that its impact resistance reaches more than 1.5Nm. Through die extrusion, the edge material of the cap is squeezed out and filled with the gap of the inner diameter of the groove, so as to achieve a fixing effect.

[0017] 3. The nut is pressed into the insert by a hydraulic press, and the ribs and teeth act to achieve an anti-slip and anti-rotation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model.

[0019] Figure 2 This is a structural schematic diagram of the utility model from another viewing angle.

[0020] Figure 3 It is a front view of the utility model.

[0021] Figure 4 This is a first end view of the utility model.

[0022] Figure 5 This is a second end view of the utility model.

[0023] Figure 6 This is a structural schematic diagram of the second embodiment of the utility model.

[0024] In the figure: 1. nut body; 2. through hole; 3. thread; 4. flange; 5. groove; 6. cover; 7. rib; 8. tooth. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0026] Embodiment 1:

[0027] like Figures 1 to 5 As shown, a self-clinching nut comprises: a nut body 1, a through hole 2 penetrating the nut body 1 is provided at the center of the nut body 1, and a thread 3 is provided on the inner wall of the through hole 2. The thread 3 extends from the first end of the nut body 1 to the second end of the nut body 1 to ensure that the effective thread meets the designed length.

[0028] A flange 4 is provided at the second end of the nut body 1 . A groove 5 is provided on the second surface of the flange 4 corresponding to the through hole 2 . A cover 6 is provided in the groove 5 . The cover 6 closes one end of the through hole 2 and is fixedly connected to the flange 4 .

[0029] The groove 5 is circular and arranged concentrically with the through hole 2. The cover 6 is circular and matched with the groove 5.

[0030] Preferably, the cover 6 is fixedly connected to the flange 4 by extrusion through stamping deformation. Specifically, in order to ensure the firmness of the connection of the cover 6, an eight-point riveting method is adopted to make its impact resistance reach more than 1.5Nm. Eight concave points are formed on the cover 6 and the flange 4 through eight-point stamping and extrusion of the mold to extrude the edge material of the cover 6 and fill the gap between the cover 6 and the groove wall to achieve a fixing effect. The concave points are evenly distributed along the circumference of the cover 6. In other embodiments, the number of riveting points can be any appropriate value.

[0031] The first end of the nut body 1 is chamfered to reduce the size of the first end of the nut body 1, making it easier for the nut as a whole to be pressed into the interior of the aluminum part with the first end as the head.

[0032] The design requires that the aluminum part has threads for fixed installation, and the threads have a certain strength and are resistant to loosening during pull-out tests. According to the requirements, the nut designed in this application is a self-clinching nut that is pressed into the aluminum part. The finished nut is pressed into the insert by a hydraulic press, and the first end of the chamfered nut body forms a pointed structure that is convenient for pressing into the aluminum part.

[0033] A plurality of evenly distributed ribs 7 are arranged on the outer peripheral surface of the nut body 1. The ribs 7 extend from the middle of the nut body 1 to the flange 4, and a pointed structure is arranged at the first end, and the second end is connected to the first surface of the flange 4. The pointed structure provides convenience when the nut is pressed into the aluminum part.

[0034] Furthermore, a plurality of latch teeth 8 are evenly arranged along the circumference of the first surface of the flange 4, and the latch teeth 8 are located between two adjacent ribs 7. The latch teeth 8 are triangular in structure, and the first and second sides of the triangular structure are fixedly connected to the first surface of the flange 4 and the outer peripheral surface of the nut body 1, respectively, and the width of the latch teeth 8 gradually narrows from the first and second sides of the triangular structure to the third side. The latch teeth 8 can improve the anti-slip and anti-rotation effects of the rivet nut, and its gradually thinning triangular design also makes it more convenient to press the nut into the aluminum part.

[0035] Embodiment 2:

[0036] like Figure 6 As shown, the difference between this embodiment and the first embodiment is that the stamping method adopted for the cover 6 is circular stamping, that is, a circular depression is stamped on the outer side of the circular cover 6 so that the groove 5 is pressed inward to fix the cover 6.

[0037] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A self-clinching nut, characterized in that: include: A nut body (1); the nut body (1) is provided with a through hole (2) penetrating the nut body (1), and a thread (3) is provided on the inner wall of the through hole (2); the thread (3) extends from the first end of the nut body (1) to the second end of the nut body (1); A flange (4) is provided at the second end of the nut body (1); a groove (5) is provided in the flange (4) corresponding to the through hole (2); a cover (6) is provided in the groove (5); the cover (6) closes the end of the through hole (2) and is fixedly connected to the flange (4).

2. The self-clinching nut according to claim 1, characterized in that: The groove (5) is circular and is arranged concentrically with the through hole (2); the sealing cover (6) is circular and matches the groove (5).

3. The self-clinching nut according to claim 1, characterized in that: The sealing cover (6) is extruded and fixedly connected to the flange (4) through stamping deformation.

4. The self-clinching nut according to claim 1, characterized in that: The first end of the nut body (1) is chamfered.

5. The self-clinching nut according to claim 1, characterized in that: The outer peripheral surface of the nut body (1) is provided with a plurality of evenly distributed ribs (7).

6. The self-clinching nut according to claim 5, characterized in that: The rib (7) extends from the middle of the nut body (1) to the flange (4), and a pointed structure is provided at a first end, and a second end is connected to a first surface of the flange (4).

7. The self-clinching nut according to claim 6, characterized in that: The first surface of the flange (4) is evenly provided with a plurality of latching teeth (8) along the circumference; the latching teeth (8) are located between two adjacent ribs (7).

8. The self-clinching nut according to claim 7, characterized in that: The latching tooth (8) is in a triangular structure, wherein a first side and a second side of the triangular structure are fixedly connected to a first surface of the flange (4) and an outer peripheral surface of the nut body (1) respectively, and a width of the latching tooth (8) gradually narrows from the first side and the second side of the triangular structure to the third side.

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