Self-puncturing pressing rivet screw

Abstract

The utility model relates to the technical field of machinery, in particular to a self-puncturing pressure riveting screw which comprises a screw body and a riveting section, the riveting section is fixedly connected with the screw body, and the riveting section is provided with a riveting ring hole wall, a plurality of grooves, a spline tooth part and a riveting ring inner hole. During specific use, the self-puncturing rivet pressing screw can puncture a metal plate in the riveting process, so that self-puncturing rivet turning is achieved, the metal plate trepanning procedure can be omitted, and the installation cost is greatly reduced. Meanwhile, the riveting device can be suitable for different plate thicknesses, the application range is wide, the riveting device can be suitable for both thin and thick plates, and the riveting mode can provide good anti-push-out and anti-rotation performance; in this way, the technical problem that when a bolt type in the prior art is applied to aluminum alloy plate connection under the new energy automobile lightweight background, the welding quality is unstable, the strength is limited, the application range is limited, and the high-performance requirement of a new energy automobile for a connecting piece is difficult to meet is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical technical field especially relates to a self -piercing rivet screw. BACKGROUND

[0002] Bolts, as key elements of connecting and fixing components, are widely used in many fields such as civil, commercial and military, especially playing an indispensable role in large mechanical equipment such as automobile manufacturing and aviation industry. The demand for bolts in the automobile industry is particularly diverse. Common bolt types include rivet bolts, rivet bolts, rivet bolts and welded bolts, each type has its unique advantages and limitations.

[0003] Rivet bolts are known for their easy installation, but the strength is relatively limited, and it is easy to loosen in long-term use or vibration environment, affecting the stability and reliability of the connection. The thickness of the rivet bolt is strictly required, which limits its application range. Although the rivet bolt can realize rapid connection and is suitable for cavity structure, the bolt is easy to tilt after the riveting process, which affects the accuracy and aesthetics of the connection.

[0004] With the vigorous rise of new energy automobile industry, automobile lightweight becomes a development trend, and the application proportion of aluminum alloy sheet in vehicle manufacturing increases significantly. Under this background, aluminum welded bolts, as an important fastener for connecting aluminum alloy sheet, are increasingly important. However, although aluminum welded bolts have the advantages of light weight and good welding performance, they also have a series of problems that cannot be ignored.

[0005] Firstly, the material composition of aluminum welded bolt has a crucial influence on the welding quality. Improper composition selection can easily lead to the generation of pores and cracks, thereby weakening the welding strength. Secondly, virtual welding phenomenon is easy to occur during the welding process, which affects the firmness of the connection. In addition, aluminum welded bolts usually adopt electric arc welding method, which is easy to be affected by external factors, resulting in unstable welding state, and when welding very thin sheet metal, it is easy to punch the sheet metal, causing damage to the component.

[0006] In summary, the bolt types in the prior art have unstable welding quality, limited strength and limited application range when applied to the connection of aluminum alloy sheet under the background of new energy automobile lightweight, which makes it difficult to meet the high performance requirements of new energy automobiles for connecting parts. INVENTION CONTENTS

[0007] The utility model aims at providing a self -piercing rivet screw, which aims at solving the technical problems that the bolt types in the prior art have unstable welding quality, limited strength and limited application range when applied to the connection of aluminum alloy sheet under the background of new energy automobile lightweight, which makes it difficult to meet the high performance requirements of new energy automobiles for connecting parts.

[0008] To achieve the above object, the utility model discloses a kind of self-piercing rivet screws, including screw body and riveting section, the riveting with the fixed connection of screw body, the riveting section has rivet ring hole wall, multiple recesses, flower tooth part and rivet ring inner hole;

[0009] The rivet ring hole wall is annular, and the flower tooth part is connected with the rivet ring hole wall.

[0010] The rivet ring inner hole includes a tapered hole and a straight hole, and the tapered hole is located above the straight hole.

[0011] The screw body includes a connecting section and a threaded section, the connecting section is fixedly connected with the riveting section, and the threaded section is fixedly connected with the connecting section.

[0012] The threaded section is located below the riveting section.

[0013] The multiple recesses are uniformly distributed along the axial center line of the rivet ring hole wall.

[0014] Each recess includes a flower tooth plane and a recess inclined surface, and in each recess, the number of flower tooth planes is two, and both flower tooth planes are connected with the recess inclined surface.

[0015] The self-piercing rivet screw can pierce sheet metal during riveting, thereby realizing self-piercing riveting. This method not only reduces the sheet metal hole forming process, but also greatly reduces the installation cost. It can be applied to different plate thicknesses and has a wide range of applications. Thin and thick plates can be used, and this riveting method can provide good anti-ejection and anti-rotation performance.

[0016] The thickness of the rivet ring hole wall is very small, and the force is concentrated on a small force surface during installation, so that the sheet metal can be pierced under a small installation force, reducing the installation force of the rivet screw. And because of less material, the degree of deformation of the sheet metal during riveting can be reduced, and the diameter of the rivet ring after riveting can be reduced.

[0017] The tapered hole in the upper half of the rivet ring inner hole can make the rivet ring hole wall expand outward first, providing the possibility of flat riveting, making it easier to form a self-piercing rivet screw during riveting, and improving the holding force of the self-piercing rivet screw, making the sheet metal material fill the recess bottom more perfectly, and improving the anti-ejection performance of the part.

[0018] The flower tooth part is composed of a circle of uniformly distributed flower teeth, the flower tooth feature of this mode is easier to pierce into sheet metal, and the excess material of the sheet metal is better filled to the bottom of the groove to form an engaged state, thereby improving the anti-ejection performance and anti-rotation performance, and each groove has two symmetrical flower tooth planes, the two symmetrical flower tooth planes act as force receiving surfaces in the process of part rotation and can play the role of a baffle, and are the main features for providing the anti-rotation performance of the part.

[0019] In this way, the technical problems that the welding quality is unstable, the strength is limited, and the application range is limited when the bolt type in the prior art is applied to the connection of aluminum alloy plates in the lightweight background of new energy vehicles, and it is difficult to meet the high performance requirements of new energy vehicles for connecting parts are solved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, a brief introduction will be given below to the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0021] Figure 1 is a front structure schematic diagram of the self-piercing press-in screw of the present application.

[0022] Figure 2 is a partial structure enlarged view of the self-piercing press-in screw of the present application. Figure 1

[0023] Figure 3 is a sectional view of the self-piercing press-in screw of the present application. Figure 1

[0024] Figure 4 is a back structure schematic diagram of the self-piercing press-in screw of the present application.

[0025] 1-screw body, 2-riveting section, 3-riveting ring hole wall, 4-groove, 5-flower tooth part, 6-riveting ring inner hole, 7-tapered hole, 8-straight hole, 9-connecting section, 10-threaded section, 11-flower tooth plane, 12-groove inclined surface DETAILED DESCRIPTION

[0026] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0027] Please refer to Figures 1 to 4 , wherein Figure 1 ​​It is the front structure schematic diagram of the self-piercing press-in rivet nut of the utility model. Figure 2 It is the Figure 1 Partial structure enlarged view of the utility model. Figure 3 It is the Figure 1 Sectional view of the utility model. Figure 4 It is the back structure schematic diagram of the self-piercing press-in rivet nut of the utility model.

[0028] The utility model provides a kind of self-piercing press-in rivet nut, including screw body 1 and riveting section 2, the riveting with the screw body 1 fixed connection, the riveting section 2 has rivet ring hole wall 3, multiple recess 4, flower tooth part 5 and rivet ring inner hole 6;

[0029] The rivet ring hole wall 3 is annular, and the flower tooth part 5 is connected with the rivet ring hole wall 3;

[0030] The rivet ring inner hole 6 includes tapered hole 7 and straight hole 8, and the tapered hole 7 is located above the straight hole 8.

[0031] The screw body 1 includes connecting section 9 and threaded section 10, the connecting section 9 is fixedly connected with the riveting section 2, and the threaded section 10 is fixedly connected with the connecting section 9.

[0032] The threaded section 10 is located below the riveting section 2.

[0033] Multiple recesses 4 are evenly distributed along the axial center line of the rivet ring hole wall 3.

[0034] Each recess 4 includes a flower tooth plane 11 and a recess inclined surface 12, and in each recess 4, the number of flower tooth planes 11 is two, and both flower tooth planes 11 are connected with the recess inclined surface 12.

[0035] For this specific embodiment, in specific use, the self-piercing press-in rivet nut can pierce sheet metal during riveting, thereby realizing self-piercing riveting. This method not only reduces the sheet metal hole forming process, but also greatly reduces the installation cost. At the same time, it can be applied to different plate thicknesses, has a wide range of applications, and can be applied to thin and thick plates. This riveting method can provide good anti-ejection and anti-rotation performance.

[0036] The thickness of the rivet ring hole wall 3 is very small, so that the force is concentrated on a very small stress surface during installation, so that the sheet metal can be pierced under a very small installation force, reducing the installation force of the rivet nut. And because of less material, the degree of deformation of the sheet metal during riveting can be reduced, and the diameter of the rivet ring after riveting can also be reduced.

[0037] The tapered hole 7 in the upper half of the rivet ring inner hole 6 can make the rivet ring hole wall 3 preferentially expand outward, providing the possibility of flat rivet die riveting, also making it easier for self-piercing rivet screws to be formed in the process of reverse riveting, and also improving the holding force of the self-piercing rivet screws, making the sheet metal material fill the groove 4 bottom more perfectly, and improving the anti-ejection performance of the part.

[0038] The flower tooth part 5 is composed of a ring of uniformly distributed flower teeth. This way of flower tooth features is easier to pierce into sheet metal, so that the excess material of the sheet metal can be better filled into the groove 4 bottom to form an engaged state, thereby improving the anti-ejection performance and anti-rotation performance. Meanwhile, each groove 4 has two symmetrical flower tooth planes 11, which act as force surfaces during part rotation and can act as baffles, which are the main features for providing anti-rotation performance for the part.

[0039] In this way, the technical problem that the welding quality is unstable, the strength is limited, and the application range is limited when the bolt type in the prior art is applied to the connection of aluminum alloy plates in the lightweight background of new energy vehicles, thereby making it difficult to meet the high performance requirements of new energy vehicles for connecting parts is solved.

[0040] As shown in Figure 1 The rivet screw has the following main features: it includes a screw body 1 and a riveting section 2, the riveting section 2 has a rivet ring hole wall 3, a plurality of grooves 4, a flower tooth part 5, and a rivet ring inner hole 6; the screw body 1 mainly serves as a carrier so that threads and other features can be attached to the screw body 1.

[0041] As shown in Figure 2 The rivet ring hole wall 3 serves to press sheet metal material into the groove 4 during riveting, thereby clamping the sheet metal;

[0042] The groove 4 is composed of the flower tooth plane 11 and the groove inclined surface 12. The groove inclined surface 12 has the advantage of allowing the sheet metal material to better fill the groove 4 bottom, making it fit more tightly, and also reducing the installation force of the rivet screw to some extent, while also being beneficial to mold demolding in the production process.

[0043] The flower tooth part 5 is composed of a ring of uniformly distributed flower teeth, and each flower tooth corresponds to two flower tooth planes 11 for preventing the rivet screw from rotating;

[0044] As shown in Figure 3 As shown in the cross-sectional view of the rivet screw, the lower half of the rivet ring inner hole 6 is the straight hole 8, and the upper half is the tapered hole that gradually expands outward, so that the rivet ring hole wall 3 can preferentially expand outward during riveting, thereby making it easier for the rivet screw to be formed in the process of reverse riveting.

[0045] The self-piercing pressure rivet nut can pierce sheet metal in the riveting process, so that self-piercing riveting is realized, the sheet metal hole forming process can be reduced, and the installation cost is greatly reduced.

[0046] The thickness of the rivet ring hole wall 3 is very thin, the force is concentrated on a small force surface during installation, the sheet metal can be pierced under a small installation force, and the installation force of the rivet nut is reduced.

[0047] The tapered hole 7 on the upper half of the rivet ring inner hole 6 can make the rivet ring hole wall 3 expand outward first, which provides the possibility of flat riveting, and also makes the self-piercing rivet nut easier to form during riveting, and improves the holding force of the self-piercing rivet nut, so that the sheet metal material is better filled at the bottom of the groove 4, and the anti-ejection performance of the part is improved.

[0048] The flower tooth part 5 is composed of a circle of uniformly distributed flower teeth, and the flower tooth feature of this way is easier to pierce into sheet metal, so that the excess material of the sheet metal is better filled at the bottom of the groove 4, and the meshing state is formed, the anti-ejection performance and the anti-rotation performance are improved, and each groove 4 has two symmetrical flower tooth planes 11, which act as force surfaces during part rotation and can act as a baffle, which is the main feature of the part to provide anti-rotation performance.

[0049] In this way, the technical problems that the welding quality is unstable, the strength is limited, and the application range is limited when the bolt type in the prior art is applied to the connection of aluminum alloy plates in the lightweight background of new energy vehicles, so that it is difficult to meet the high performance requirements of new energy vehicles for connecting parts are solved.

[0050] The above only discloses a preferred embodiment of the utility model, and of course cannot limit the scope of the utility model, and those skilled in the art can understand that all or part of the above-mentioned embodiments can be implemented, and equivalent changes made according to the utility model claims still belong to the scope covered by the utility model.

Claims

1. A self-piercing rivet, comprising, characterized in that, a screw body and a riveting section, the riveting section is fixedly connected with the screw body, the riveting section has a rivet hole wall, a plurality of grooves, a flower tooth part and a rivet inner hole; the rivet hole wall is annular, the flower tooth part is connected with the rivet hole wall; the rivet inner hole includes a tapered hole and a straight hole, the tapered hole is located above the straight hole.

2. The self-piercing rivet according to claim 1, wherein, the screw body includes a connecting section and a threaded section, the connecting section is fixedly connected with the riveting section, and the threaded section is fixedly connected with the connecting section.

3. The self-piercing rivet according to claim 2, wherein, the threaded section is located below the riveting section.

4. The self-piercing rivet according to claim 3, wherein, a plurality of the grooves are uniformly distributed along the axial center line of the rivet hole wall.

5. The self-piercing rivet according to claim 4, wherein, each of the grooves includes a flower tooth plane and a groove inclined surface, in each of the grooves, the number of the flower tooth planes is two, and the two flower tooth planes are connected with the groove inclined surface.

Images