Self-plugging rivet for riveting automobile parts

Abstract

The self-plugging rivet comprises a rivet core and a rivet body, the rivet body is provided with a rivet hole in the axial direction, a limiting disc is arranged on the periphery of the rear end of the rivet body, the rivet core comprises a head portion and a tail portion, the head portion is located in front of the rivet body, the section of the head portion is larger than that of the rivet hole, and the tail portion is matched with the rivet hole in shape and slides in the axial direction of the rivet hole. The tail portion comprises a front half tail portion located in the rivet hole, tangent planes are arranged on the two sides of the front half tail portion respectively, the front ends of the tangent planes serve as separation positions of the head portion and the tail portion, supporting feet formed by stamping towards the rivet hole are arranged on the two sides, close to the limiting disc, of the periphery of the rivet body respectively, and the rear ends of the supporting feet serve as connecting ends and are connected to the rivet body. The radial faces, located at the front end and the rear end of the tangent plane, of the front half tail serve as limiting faces for limiting the moving range of the guide end. By adopting the scheme, the utility model provides the self-plugging rivet for riveting the automobile parts, which can guide the rivet to regularly deform and cannot be separated in the transportation process.

Description

Technical Field

[0001] The utility model relates to the field of automobile accessories, in particular to a blind rivet used for riveting automobile parts. Background Art

[0002] Blind rivets, also known as pull rivets or core-pulling rivets, are a type of rivets used for single-sided riveting. This type of rivet requires a special tool - a rivet gun (manual, electric, or pneumatic) to operate during riveting. Blind rivets include a mandrel and a rivet body. The rivet body is provided with a nail hole along the axial direction, and a limit plate is provided on the outer periphery of the rear end of the rivet body. The mandrel includes a head and a tail. The head is located in front of the rivet body and has a cross-section larger than the nail hole. The tail is adapted to the shape of the nail hole and slides axially along the nail hole. During riveting, the rivet body is passed through the two automotive parts to be fixed. After the rivet gun is abutted against the rear end of the rivet body, the mandrel is pulled backward. The head deforms and expands the rivet body to form a fixed structure of the two automotive parts, and then the head and tail are separated.

[0003] Blind rivets are also used in multiple locations inside the car. During the actual installation process, the following problems exist: ① When the rivet gun pulls the nail core, the nail core is tilted, which causes the rivet body to expand irregularly, that is, the auto parts cannot be reliably fixed. The rivet needs to be removed and reinstalled. Removing the rivet is time-consuming and labor-intensive, and the installation efficiency is reduced; ② Due to the inevitable vibration during transportation, the combined nail core and rivet body move relative to each other or even separate. The separated nail core and rivet body need to be collected and reassembled, which brings unnecessary trouble to the installation; ③ When the rivet gun pulls the nail core, the head and tail of the nail core need to be separated, but different blind rivets will cause different connection strengths between the head and tail of the nail core due to processing errors. When the connection strength between the head and the tail is too strong and the rivet gun continues to increase the pulling force, the rivet body will cause the auto parts to deform (different auto parts can withstand different strengths), resulting in material waste and increased processing costs. Summary of the invention

[0004] In view of the shortcomings of the prior art, the utility model aims to provide a blind rivet for riveting automobile parts, which can guide the rivet to deform regularly and will not separate during transportation.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: comprising a nail core and a rivet body, the rivet body is provided with a nail hole in the axial direction, a limiting disk is provided on the outer periphery of the rear end of the rivet body, the nail core comprises a head and a tail which are integrally arranged, the head is located in front of the rivet body and has a cross-section larger than the nail hole, the tail is adapted to the shape of the nail hole and slides axially along the nail hole, the tail comprises a front half tail portion located in the nail hole, both sides of the front half tail portion are respectively provided with cut surfaces, the front end of the cut surface serves as a separation position of the head and the tail, both sides of the periphery of the rivet body close to the limiting disk are respectively provided with supporting feet formed by stamping toward the nail hole, the rear end of the supporting feet serves as a connecting end and is connected to the rivet body, the front end serves as a guiding end which abuts against the cut surface and guides the tail portion to move axially, and the radial surfaces of the front half tail portion located at the front and rear ends of the cut surface serve as limiting surfaces for limiting the moving range of the guiding end.

[0006] By adopting the above technical solution, when the rivet gun pulls the nail core backward, the guide end and the cut surface form a guide structure, so that the nail core can avoid circumferential rotation when it moves stably along the axial direction of the nail hole, thereby ensuring the expansion rule and stably forming a fixed structure of the two automobile parts. Secondly, the limiting surface limits the moving range of the guide end, that is, limits the moving range of the nail core relative to the rivet body, thereby effectively avoiding the separation of the nail core and the rivet body due to vibration during transportation, eliminating the inconvenience caused by the separation. In addition, the support foot is formed by stamping the rivet body, which is simpler to process and has a better connection strength with the rivet body.

[0007] The utility model is further configured such that: during the expansion process of the rivet body, the guide end abuts against a limit surface located in the front.

[0008] By adopting the above technical solution, during the expansion process of the rivet body, the guide end abuts against the radial surface where the separation position is located, providing assistance to the separation position, so that the head and the tail are separated stably, avoiding deformation of automobile parts caused by difficult separation.

[0009] The utility model is further configured such that when the guide end is squeezed by the limiting surface, the middle part of the support leg protrudes outward to form a limiting protrusion that abuts against the inner wall of the automobile component.

[0010] By adopting the above technical solution, the deformation of the support leg is reasonably utilized so that it protrudes outward and abuts against the inner wall of the automobile component, thereby increasing the limiting friction between the inner wall of the automobile component and further improving the reliability of riveting.

[0011] The utility model is further configured as follows: the front end edge of the head is provided with a guide fillet.

[0012] By adopting the above technical solution and adding a guide fillet, the head can smoothly pass through two automobile components, thereby improving the smoothness of installation.

[0013] The utility model is further configured as follows: the rear end edge of the head is provided with an extruded fillet.

[0014] By adopting the above technical solution and adding an extrusion fillet, the initial movement of the head extruding the rivet body into the nail hole is smoother, and the shape change of the rivet body becomes more regular in combination with the guiding structure composed of the cut surface and the supporting feet.

[0015] The utility model is further configured as follows: the tail portion comprises a rear half tail portion located outside the rivet body, and the rear half tail portion is provided with a plurality of anti-slip patterns arranged along the axial direction along the circumferential direction.

[0016] By adopting the above technical solution, anti-slip patterns are added, the friction between the contact part of the rivet gun and the nail core is increased, and the action of the rivet gun pulling the nail core is made more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of a specific implementation of the utility model;

[0018] Figure 2 A three-dimensional diagram of a nail core;

[0019] Figure 3 It is a partial cross-sectional view of the working state 1 of the specific implementation mode of the utility model;

[0020] Figure 4 It is a partial cross-sectional view of the second working state of the specific implementation method of the utility model. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] like Figure 1 — Figure 4As shown, the utility model discloses a blind rivet for riveting automobile parts, comprising a nail core 1 and a rivet body 2, wherein the rivet body 2 is provided with a nail hole 21 along the axial direction, and a limiting disk 22 is provided at the outer periphery of the rear end of the rivet body 2, the nail core 1 comprises a head 11 and a tail 12 which are integrally arranged, the head 11 is located in front of the rivet body 2 and has a cross section larger than the nail hole 21, the tail 12 is adapted to the shape of the nail hole 21 and slides axially along the nail hole 21, the tail 12 comprises a front half tail 121 located in the nail hole 21, and cut surfaces 122 are respectively provided on both sides of the front half tail 121, and the front end of the cut surface 122 serves as a separation position a of the head 11 and the tail 12, and legs 23 which are formed by stamping toward the nail hole 21 are respectively provided on both sides of the outer periphery of the rivet body 2 near the limiting disk 22, the rear end of the legs 23 serves as a connecting end 231 and is connected to the rivet body 2, and the front end serves as a guide The end 232 abuts against the cut surface 122 and guides the axial movement of the tail 12. The radial surfaces of the front half tail 121 located at the front and rear ends of the cut surface 122 serve as limiting surfaces 125 for limiting the movement range of the guiding end 232. When the rivet gun pulls the nail core 1 backward, the guiding end 232 and the cut surface 122 form a guiding structure, so that the nail core 1 can avoid circumferential rotation when moving axially stably along the nail hole 21, thereby ensuring the expansion rule and stably forming a fixed structure of the two automobile parts. Secondly, the limiting surface 125 limits the movement range of the guiding end 232, that is, limits the movement range of the nail core 1 relative to the rivet body 2, thereby effectively avoiding the separation of the nail core 1 and the rivet body 2 due to vibration during transportation, eliminating the inconvenience caused by the separation. In addition, the support foot 23 is formed by stamping the rivet body 2, which is simpler to process and has better connection strength with the rivet body 2.

[0024] During the expansion of the rivet body 2, the guide end 232 abuts against the limiting surface 125 located in the front. During the expansion of the rivet body 2, the guide end 232 abuts against the radial surface where the separation position is located, providing assistance to the separation position, so that the head 11 and the tail 12 are stably separated, avoiding deformation of automobile parts caused by difficult separation.

[0025] When the guiding end 232 is squeezed by the limiting surface 125, the middle part of the supporting leg 23 protrudes outward to form a limiting protrusion 233 which abuts against the inner wall of the automobile component. The deformation of the supporting leg 23 is rationally utilized so that it protrudes outward and abuts against the inner wall of the automobile component, thereby increasing the limiting friction between the inner wall of the automobile component and further improving the reliability of riveting.

[0026] A guide fillet 111 is provided at the front edge of the head 11 . The guide fillet 111 is added to allow the head 11 to pass through two automobile components smoothly, thereby improving installation smoothness.

[0027] An extrusion fillet 112 is provided at the rear end edge of the head 11. The extrusion fillet 112 makes the initial movement of the head 11 extruding the rivet body 2 into the nail hole 21 smoother, and the guiding structure composed of the cut surface 122 and the support leg 23 makes the deformation of the rivet body 2 more regular.

[0028] The tail portion 12 includes a rear half tail portion 123 located outside the rivet body 2. The rear half tail portion 123 is circumferentially provided with a plurality of anti-skid patterns 124 arranged along the axial direction. The anti-skid patterns 124 are added to increase the friction between the contact part between the rivet gun and the nail core 1, making the action of the rivet gun pulling the nail core 1 more reliable.

[0029] like Figure 3 As shown, during riveting, the rivet body 2 is passed through the two automobile parts (b, c) to be fixed, as shown in FIG. Figure 4 As shown, after the rivet gun abuts against the rear end of the rivet body 2, the nail core 1 is pulled backward. During the pulling process, the head 11 causes the rivet body 2 to deform and expand. The limiting surface 125 located in the front abuts against the guide end 232 and then squeezes the support leg 23. The middle part of the support leg 23 protrudes outward to form a limiting protrusion 233 that abuts against the inner wall of the automobile part. After the rivet body 2 expands to the position 2, with the help of the guide end 232, the head 11 and the tail 12 are separated at the separation position a.

Claims

1. A blind rivet for riveting automobile parts, comprising a mandrel and a rivet body, wherein the rivet body is provided with a nail hole along the axial direction, a limit plate is provided on the outer periphery of the rear end of the rivet body, the mandrel comprises an integrally arranged head and tail, wherein the head is located in front of the rivet body and has a cross section larger than the nail hole, and the tail is adapted to the shape of the nail hole and slides along the axial direction of the nail hole, and is characterized in that: The tail portion includes a front half tail portion located in the nail hole, and sections are respectively arranged on both sides of the front half tail portion. The front end of the section serves as a separation position of the head and the tail portion. Support feet are respectively arranged on both sides of the outer periphery of the rivet body close to the limit plate and formed by stamping toward the nail hole. The rear end of the support feet serves as a connecting end and is connected to the rivet body, and the front end serves as a guiding end that abuts against the section and guides the axial movement of the tail portion. The radial surfaces of the front half tail portion located at the front and rear ends of the section serve as limiting surfaces for limiting the moving range of the guiding end.

2. The blind rivet for riveting automobile parts according to claim 1, characterized in that: During the expansion process of the rivet body, the guide end abuts against the limiting surface located in the front.

3. The blind rivet for riveting automobile parts according to claim 2, characterized in that: When the guide end is squeezed by the limiting surface, the middle part of the support foot protrudes outward to form a limiting protrusion that abuts against the inner wall of the automobile component.

4. The blind rivet for riveting automobile parts according to claim 1, characterized in that: The front end edge of the head is provided with a guide fillet.

5. The blind rivet for riveting automobile parts according to claim 1, characterized in that: The rear end edge of the head is provided with an extruded fillet.

6. The blind rivet for riveting automobile parts according to claim 1, characterized in that: The tail portion comprises a rear half tail portion located outside the rivet body, and the rear half tail portion is provided with a plurality of anti-slip patterns arranged along the axial direction along the circumferential direction.

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