Flat-head riveting fastener

Abstract

The utility model relates to a flat-head rivet fastener, which comprises a head part, a deformation section and a fixed section which are connected in sequence, the deformation section can bulge and deform after being subjected to axial force, a deformation hole is arranged in the deformation section, the deformation hole penetrates through the head part, a conical section is arranged between the deformation section and the fixed section, and the diameter of the conical section is gradually increased from the fixed section to the deformation section. The threaded hole coaxial with the deformation hole is formed in the fixed section, and the conical section is arranged, so that the pulling force of the hand riveter can be more uniformly distributed on the deformation section, and the deformation section is promoted to deform smoothly; due to the gradually-thinned shape, the deformation process is more stable, and the fracture risk caused by local stress concentration is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a flat-head rivet fastener. Background Art

[0002] Rivet nuts are suitable for one-way connection of thin plates and profiles. They have a simple process and low cost, and are widely used in the assembly of products in the automotive, aviation, instrumentation, home improvement and other industries. Since rivet nuts need to be deformed during riveting, the strength of the parts cannot be too high, so the overall performance level of the product is usually low. However, in recent years, the market demand for high-strength rivet nuts has increased. Rivet nuts are required to ensure effective riveting, and at the same time, they are required to have a strength level of 10 or even 12. This poses new challenges to product structural design and heat treatment methods. However, after the riveting process, the deformation zone of existing rivet nuts is prone to cracking. When the deformation zone cracks after riveting, the stability of the rivet nut will be low. Utility Model Content

[0003] The purpose of the utility model is to provide a flat head pull rivet fastener to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a flat-head rivet fastener, comprising a head, a deformation section and a fixed section connected in sequence, the deformation section can bulge and deform after being subjected to axial force, a deformation hole is provided in the deformation section, the deformation hole passes through the head, a conical section is provided between the deformation section and the fixed section, the diameter of the conical section gradually increases from the fixed section to the deformation section, and a threaded hole coaxially arranged with the deformation hole is provided in the fixed section.

[0005] Compared with the existing technology, the setting of the conical section allows the pulling force of the rivet gun to be more evenly distributed on the deformation section, prompting the deformation section to deform smoothly; this gradually tapering shape makes the deformation process smoother and reduces the risk of rupture caused by local stress concentration.

[0006] According to the preferred technical solution of the present utility model, the outer diameter of the head is larger than the outer diameters of the deformation section and the fixing section.

[0007] According to the preferred technical solution of the present invention, the deformation section is conical, and the diameter of the deformation section gradually increases from the fixed section to the head.

[0008] According to the preferred technical solution of the present invention, a deformation layer is provided in the deformation hole, and the deformation layer is located in the deformation section.

[0009] According to the preferred technical solution of the present invention, a stop hole is provided on the top of the deformation hole, and the stop hole is located inside the head; the stop hole is provided in a specific shape that can be matched with a tightening tool for connection.

[0010] In addition to the technical problems solved by the present invention, the technical features that constitute the technical solutions, and the advantages brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the present invention, other technical features included in the technical solutions, and the advantages brought about by these technical features will be further described in detail in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a half-section view of the present utility model.

[0012] Figure 2 It is a top view of the utility model.

[0013] Explanation of the accompanying drawings: 01, head; 02, deformation section; 03, fixing section; 04, deformation hole; 05, stop hole; 06, threaded hole; 07, conical section; 08, deformation layer. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0015] See also Figure 1-2 As shown, the flat-head rivet fastener of the present invention includes a head 01, a deformation section 02, and a fixed section 03 connected in sequence. The deformation section 02 is provided with a deformation hole 04, which passes through the head 01. The top of the deformation hole 04 is provided with a stop hole 05, which is located in the head 01. The stop hole 05 is configured to have a specific shape that can be connected with a tightening tool. For example, the specific shape may include a pentagon, hexagon, hexagon, plum blossom, cross, etc., and the corresponding stop hole 05 may include an external pentagon head, external hexagon head, hexagon head, plum blossom head, cross head, etc.

[0016] A threaded hole 06 is provided in the fixing section 03, which is coaxial with the deformation hole 04. The diameter of the threaded hole 06 is smaller than the diameter of the inscribed circle of the stop hole 05. When faced with different usage scenarios, the deformation hole 04 and the threaded hole 06 play different roles. The first usage method is when a bolt is fixed to one of the components by welding or other means. A through hole is provided on the other component, and the diameter of the through hole is larger than the diameter of the deformation section 02. When the deformation section 02 is provided in the through hole, the head 01 is supported on one side of the component, and the fixing section 03 and part of the deformation section 02 pass through the through hole and are located on the opposite side of the component, so that the deformation section 02 bulges and deforms on the opposite side of the component to form a bulging deformation structure, so that the outer diameter of the bulging deformation structure increases to be larger than the inner diameter of the through hole, so that the bulging deformation structure and the head 01 are located on opposite sides of the component and will not be clamped with the component. Since the diameter of the through hole is larger than the diameter of the deformation section 02, the rivet fastener can rotate in the through hole. The wall thickness of the deformable section 02 is less than or equal to the wall thickness of the fixed section 03, making it easier for the deformable section 02 to bulge and deform relative to the fixed section 03. The fastener of the present application is rotated and mounted on another component. A tool (such as an Allen wrench) is inserted into the deformable hole 04, and a bolt is threadedly connected to the threaded hole 06 to achieve the connection between the two components.

[0017] Another usage method is to provide a through hole in the component, where the diameter of the through hole is larger than the diameter of the deformation section 02. When the deformation section 02 is inserted into the through hole, the head 01 is supported on one side of the component, and the fixed section 03 and part of the deformation section 02 pass through the through hole and are located on the opposite side of the component, causing the deformation section 02 to bulge and deform on the opposite side of the component, forming a bulging deformation structure. The outer diameter of the bulging deformation structure increases to be larger than the inner diameter of the through hole, so that the bulging deformation structure and the head 01 are located on opposite sides of the component. The bulging deformation structure and the head 01 cooperate to clamp and fix the opposite sides of the object, thereby fastening the rivet fastener to the component.

[0018] The outer diameter of the head 01 is larger than that of the deforming section 02 and the fixed section 03. A conical section 07 is located between the deforming section 02 and the fixed section 03. The diameter of the conical section 07 gradually increases from the fixed section 03 to the deforming section 02. The conical section 07 acts as a guide, distributing the pulling force of the rivet gun more evenly across the deforming section 02, thus promoting smooth deformation of the deforming section 02. This gradually tapering shape makes the deformation process smoother and reduces the risk of rupture caused by localized stress concentration.

[0019] The deforming section 02 is conical, with its diameter gradually increasing from the fixed section 03 toward the head 01. This conical design increases its surface area, allowing for greater deformation under the same tensile force. This allows the rivet nut to better adhere to the connected component, enhancing the connection's security. Due to its conical shape, the deforming section 02 can adapt to mounting holes of varying diameters to a certain extent. Even if the mounting hole size deviates slightly, the conical section 07 can fill the gap through its own deformation, ensuring the rivet nut is securely installed on the connected component.

[0020] A deformation layer 08 is provided in the deformation hole 04, and the deformation layer 08 is located in the deformation section 02. The deformation layer 08 and the deformation section 02 are combined together by rolling, welding and other processes.

[0021] The deformation layer 08 is made of high-performance engineering plastics, such as polyetheretherketone (PEEK).

[0022] The deformation layer 08 can play a buffering role during riveting, reduce stress concentration, and improve the firmness of the riveting. In addition, the rubber can also provide a certain sealing performance to prevent moisture and impurities from entering the connection part.

[0023] If the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] The above embodiments are merely descriptions of preferred embodiments of the present invention and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A flat head rivet fastener comprising a head, a deformation section and a fixed section connected in sequence, wherein the deformation section can bulge and deform when subjected to an axial force, and is characterized in that: A deformation hole is provided in the deformation section, and the deformation hole passes through the head. A conical section is provided between the deformation section and the fixed section. The diameter of the conical section gradually increases from the fixed section to the deformation section. A threaded hole coaxially arranged with the deformation hole is provided in the fixed section. The outer diameter of the head is larger than the outer diameters of the deformation section and the fixed section. The deformation section is conical, and the diameter of the deformation section gradually increases from the fixed section to the head. A deformation layer is provided in the deformation hole, and the deformation layer is located in the deformation section. The deformation layer and the deformation section are combined together by rolling and welding. The deformation layer is made of high-performance engineering plastics.

2. The flat head pull rivet fastener according to claim 1, characterized in that: A stop hole is provided on the top of the deformation hole, and the stop hole is located inside the head; the stop hole is set to a shape that can be matched with a tightening tool for connection.

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