A rivet gun head module and a rivet gun

Abstract

This utility model discloses a rivet gun head module for installing rivet nuts, including a gun head body and a mandrel. The front end of the gun head body is provided with a limiting post, and the gun head body has a first through hole along its axial direction. The limiting post has a second through hole opposite to the first through hole. The front end of the limiting post has a limiting groove recessed on the outer periphery of the second through hole. The mandrel rotates sequentially through the first and second through holes. The front end of the mandrel also has an external thread section for engaging the rivet nut. When the rivet nut is fitted onto the front end of the mandrel, the flange of the rivet nut is located within the limiting groove. Through the above arrangement, the inner wall of the limiting groove restricts the radial displacement of the flange, thereby reducing the axial distance between the nut body and the flange when the rivet leg and flange are pressed against the riveted object.

Description

Technical Field

[0001] This utility model belongs to the technical field of riveting equipment, specifically relating to a riveting gun head module and a riveting gun. Background Technology

[0002] Riveting refers to the process of tightly connecting two or more workpieces together using a rivet gun and rivet nuts. Rivet nuts are widely used in battery trays (lower housings) and vehicle body parts. Taking batteries as an example, the connection structure between the battery top cover and the lower housing is usually designed so that the mounting holes of the lower housing and the top cover are riveted together using rivet nuts. A rivet nut consists of a nut body, rivet legs, and a flange. During use, the rivet gun's spindle pulls the nut body to move, causing the rivet legs to compress longitudinally. After the rivet legs bulge and deform, they cooperate with the flange to clamp the riveted parts, achieving a firm connection. The rivet gun's spindle and gun head use a relatively large clearance fit, resulting in a certain amount of play between the spindle and the gun head.

[0003] The traditional method of fitting rivet nuts and rivet heads is shown in the attached figure. Figure 1 The process involves ensuring that the flange of the rivet nut fits snugly against the end face of the rivet head. During riveting, the flange is prone to significant radial displacement relative to the nut body due to factors such as uneven compression of the rivet legs (i.e., a large axial deviation between the flange and the nut body), resulting in poor riveting performance. Utility Model Content

[0004] The present invention aims to provide a rivet gun head module and a rivet gun to alleviate the problem of large displacement of the flange relative to the nut body in the above-mentioned solutions.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A rivet gun head module for installing rivet nuts includes a gun head body and a mandrel. The gun head body has a limiting post at its front end and a first through hole along its axial direction. The limiting post has a second through hole opposite to the first through hole. A limiting groove is recessed at the front end of the limiting post on the outer periphery of the second through hole. The mandrel is rotatably inserted through the first and second through holes. The diameter of the mandrel is D1, and the inner diameters of the first and second through holes are D2, where D2-D1=D3, and the range is 0.04mm≤D3≤0.12mm. The front end of the mandrel also has an external thread section for engaging the rivet nut. When the rivet nut is fitted onto the front end of the mandrel, the flange of the rivet nut is located within the limiting groove. The diameter of the flange of the rivet nut is D4, and the inner diameter of the limiting groove is D5, where D5-D4=D6, and the range is 0.5mm≤D6≤1.2mm.

[0007] The principle and effects of this technical solution:

[0008] In its initial state, the main body of the rivet head is mounted on the rivet gun, and the mandrel of the rivet gun passes through the through hole. In use, the nut body of the rivet nut is fitted onto the threaded section of the mandrel, and the flange of the rivet nut is inserted into the limiting groove. After the nut body and the rivet leg are passed through the objects to be riveted in sequence, the mandrel is rotated, causing the mandrel to pull the nut body closer to the flange. The rivet leg is compressed under pressure, forming a bulge deformation, which, together with the flange, presses the two objects to be riveted together. During this process, when the flange abuts against the inner wall of the limiting groove, the limiting groove prevents the flange from moving further.

[0009] By using the above settings, the radial displacement of the flange is limited by the inner wall of the limiting groove, which can reduce the axial distance between the nut body and the flange when the rivet leg and the flange are pressed against the riveted object. This solves the problem that the flange is prone to large displacement relative to the nut body when riveting in the prior art.

[0010] In this invention, D3 is set to 0.05mm≤D3≤0.1mm, and D6 is set to 0.6mm≤D6≤1mm.

[0011] In this invention, the depth of the limiting groove is h, which is set to 1mm≤h≤2mm.

[0012] The above settings can further limit the offset of the rivet nut and mandrel, thereby further improving the rivet quality.

[0013] In this utility model, the limiting post is installed on the front end of the gun head body through a quick-release assembly. A boss is fixedly provided at the bottom of the gun head body. The first through hole passes through the boss. An outer edge protrudes from the top of the outer side wall of the limiting post. The quick-release assembly includes a cylinder that is rotatably sleeved on the outer edge and threadedly sleeved on the boss. An inner edge that can abut against the outer edge is fixedly provided at the bottom of the inner side wall of the cylinder.

[0014] In this utility model, the bottom of the boss is fixedly provided with a locking block at intervals, and the outer edge is provided with a locking groove opposite to the limiting block.

[0015] The principle and effects of this technical solution:

[0016] When installing the limiting post at the front end of the gun head body, first, the locking block is locked in the corresponding slot. At this time, the limiting post and the boss are coaxial, and the first through hole is aligned with the second through hole. Then, the cylinder is sleeved on the limiting post, and the inner side wall of the cylinder is threadedly connected to the outer side wall of the boss until the inner edge of the sleeve abuts against the outer edge of the limiting post. At this time, the limiting post can neither move axially or radially relative to the boss, nor can it rotate relative to the boss.

[0017] With the above design, the limiting post and the main body of the gun head are designed as separate structures, which allows for easy replacement of the limiting post after the limiting groove wears out over a long period of use, without having to replace the entire main body of the gun head, thus reducing the operating cost of the device. The quick-connect structure ensures a stable connection between the limiting post and the main body of the gun head, improving the stability of the device during use.

[0018] In this invention, the outer side wall of the gun head body is symmetrically provided with notches. This design facilitates the use of tools such as wrenches to connect the gun head body to a rivet gun.

[0019] This utility model also proposes a rivet gun, which includes the rivet gun head module described in the above solution. The gun head body is disposed at the front end of the rivet gun, and the spindle is connected to the driving component inside the rivet gun. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the connection between the rivet nut and the rivet gun head in the prior art;

[0021] Figure 2 This is an isometric drawing of an embodiment of the present invention;

[0022] Figure 3 This is an isometric sectional view of a component according to Embodiment 1 of this utility model;

[0023] Figure 4 This is an axonometric drawing of Embodiment 2 of the present invention;

[0024] Figure 5 Components disassembly for Embodiment 2 of this utility model Figure 1 ;

[0025] Figure 6 Components disassembly for Embodiment 2 of this utility model Figure 2 . Detailed Implementation

[0026] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0028] The reference numerals in the accompanying drawings of the instruction manual include: 10, rivet nut; 11, nut body; 12, rivet leg; 13, flange; 20, gun head body; 21, first through hole; 22, boss; 23, locking block; 24, notch; 31, cylinder; 32, inner edge; 40, limiting post; 41, second through hole; 42, limiting groove; 43, outer edge; 44, locking groove; 50, mandrel.

[0029] First embodiment:

[0030] As attached Figure 1-3 As shown, this utility model discloses a rivet gun head module for installing rivet nuts 10, including a gun head body 20 and a mandrel 50. A limiting post 40 is provided at the front end of the gun head body 20. A first through hole 21 is formed along the axial direction of the gun head body 20. A second through hole 41 is formed opposite to the first through hole 21. A limiting groove 42 is recessed at the front end of the limiting post 40 on the outer periphery of the second through hole 41. The mandrel 50 is rotatably inserted through the first through hole 21 and the second through hole 41. The diameter of the mandrel 50 is... The inner diameter of the first through hole 21 and the second through hole 41 is D1, and the inner diameter of the second through hole is D2. D2-D1=D3, and the value is set to 0.04mm≤D3≤0.12mm. The front end of the mandrel 50 is also provided with an external thread section for cooperating with the rivet nut 10. When the rivet nut 10 is fitted onto the front end of the mandrel 50, the flange 13 of the rivet nut 10 is located in the limiting groove 42. The diameter of the flange 13 of the rivet nut 10 is D4, and the inner diameter of the limiting groove 42 is D5. D5-D4=D6, and the value is set to 0.5mm≤D6≤1.2mm.

[0031] In this embodiment, D3 is set to 0.05mm≤D3≤0.1mm, and D6 is set to 0.6mm≤D6≤1mm.

[0032] In this embodiment, the depth of the limiting groove 42 is h, which is set to 1mm≤h≤2mm.

[0033] The specific implementation process is as follows:

[0034] In the initial state, the gun head body 20 is mounted on the rivet gun, and the mandrel 50 of the rivet gun passes through the through hole. In use, the nut body 11 of the rivet nut 10 is fitted onto the threaded section of the mandrel 50, and the flange 13 of the rivet nut 10 is inserted into the limiting groove 42. After the nut body 11 and the rivet leg 12 are passed through the riveted objects in sequence, the mandrel 50 is rotated, causing the mandrel 50 to pull the nut body 11 closer to the flange 13. The rivet leg 12 is compressed under pressure, forming a bulge deformation, which, together with the flange 13, presses the two riveted objects together. During this process, when the flange 13 abuts against the inner wall of the limiting groove 42, the limiting groove 42 prevents the flange 13 from moving further.

[0035] Second embodiment:

[0036] As attached Figure 4-6 As shown, the difference between this embodiment and the first embodiment is that: in this embodiment, the limiting post 40 is installed on the front end of the gun head body 20 through a quick-release assembly, the bottom of the gun head body 20 is fixedly provided with a boss 22, the first through hole 21 passes through the boss 22, the top of the outer side wall of the limiting post 40 is provided with an outer edge 43, the quick-release assembly includes a cylindrical body 31 that is rotatably sleeved on the outer edge 43 and threadedly sleeved on the boss 22, and the bottom of the inner side wall of the cylindrical body 31 is fixedly provided with an inner edge 32 that can abut against the outer edge 43.

[0037] In this embodiment, the bottom of the boss 22 is fixedly provided with a locking block 23 at intervals, and the outer edge 43 is provided with a locking groove 44 opposite to the limiting block.

[0038] In this embodiment, notches 24 are symmetrically provided on the outer side wall of the gun head body 20.

[0039] The specific implementation process is as follows:

[0040] When installing the limiting post 40 at the front end of the gun head body 20, firstly, the locking block 23 is locked in the corresponding locking groove 44. At this time, the limiting post 40 and the boss 22 are coaxial, and the first through hole 21 is aligned with the second through hole 41. Then, the cylinder 31 is sleeved on the limiting post 40, and the inner side wall of the cylinder 31 is threadedly connected to the outer side wall of the boss 22 until the inner edge 32 of the sleeve abuts against the outer edge 43 of the limiting post 40. At this time, the limiting post 40 can neither move axially or radially relative to the boss 22, nor can it rotate relative to the boss 22.

[0041] This utility model also proposes a rivet gun, which includes the rivet gun head module described in the above scheme, wherein the gun head body 20 is disposed at the front end of the rivet gun, and the spindle 50 is connected to the drive component inside the rivet gun.

[0042] The parts of the device not covered herein are the same as or can be implemented using existing technologies.

[0043] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A pull-rivet gun head module for installing a pull-rivet nut, characterized by, include: The gun head body has a limiting post at its front end, a first through hole along its axial direction, a second through hole opposite to the first through hole, and a limiting groove recessed at the front end of the limiting post on the outer periphery of the second through hole. The mandrel is rotatably inserted through the first through hole and the second through hole. The diameter of the mandrel is D1, the inner diameter of the first through hole and the second through hole is D2, and D2-D1=D3. The mandrel is set to 0.04mm≤D3≤0.12mm. The front end of the mandrel is also provided with an external thread section for cooperating with the rivet nut. When the rivet nut is fitted onto the front end of the mandrel, the flange of the rivet nut is located in the limiting groove. The diameter of the flange of the rivet nut is D4, the inner diameter of the limiting groove is D5, and D5-D4=D6. The setting is 0.5mm≤D6≤1.2mm.

2. The gun head module of claim 1, wherein: The D3 is set to 0.05mm≤D3≤0.1mm, and the D6 is set to 0.6mm≤D6≤1mm.

3. The gun head module of claim 1, wherein: The depth of the limiting groove is h, which is set to 1mm≤h≤2mm.

4. A gun head module according to any one of claims 1 to 3, wherein: The limiting post is installed on the front end of the gun head body through a quick-release assembly. A boss is fixedly provided at the bottom of the gun head body. The first through hole passes through the boss. An outer edge protrudes from the top of the outer side wall of the limiting post. The quick-release assembly includes a cylinder that is rotatably sleeved on the outer edge and threadedly sleeved on the boss. An inner edge that can abut against the outer edge is fixedly provided at the bottom of the inner side wall of the cylinder.

5. The gun head module of claim 4, wherein: The bottom of the boss is fixedly provided with a locking block at intervals, and the outer edge is provided with a locking groove opposite to the limiting block.

6. The rivet gun head module as described in claim 1, characterized in that: The outer side wall of the main body of the gun head has symmetrical notches.

7. A spin gun characterized by: Includes the rivet gun head module as described in any one of claims 1 to 6.

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