A pull flower rivet with a flower stroke limiting function

Abstract

The utility model relates to rivet technical field, especially a kind of pull flower rivet with blooming stroke limiting function, including nail core and nail shell, the nail core includes nail core main body, pull broken section, riveting section and nail head;The nail shell includes nail shell body and nail cap, the nail shell body includes blooming section and clamping section, the clamping section is connected in the end of the blooming section, the nail cap is connected in the end of the clamping section away from the blooming section, the end of the clamping section with the blooming section connection is equipped with blooming stroke limiting portion.The pull flower rivet with blooming stroke limiting function can limit blooming stroke, avoid the surface of workpiece to be extruded too deep to cause indentation by the blooming stroke limiting portion continue to sink when pulling rivet, avoid damaging workpiece, and blooming stroke consistency is good, solve the technical problem that the blooming position of existing pull flower rivet is extruded too deep to cause indentation on the surface of workpiece when pulling, affect workpiece appearance and riveting quality.

Description

Technical Field

[0001] This utility model relates to the field of rivet technology, and in particular to a pull rivet with a flower-shaped stroke limiting function. Background Technology

[0002] Blossom rivets, also known as flower rivets, are rivets where the rivet core pulls on the end of the rivet shell during riveting, causing the end of the shell to unfold into a petal shape. This achieves a strong connection between two riveted workpieces. They offer advantages such as unilateral installation, compatibility with various sheet materials, and good connection stability. Blossom rivets are widely used in various fields, including automotive manufacturing, construction and decoration, and home and electronic equipment. However, existing blossom rivets lack a limiting structure for the blossom stroke. Even when the blossom is in contact with the workpiece surface, the blossomed part of the rivet shell can continue to sink and press against the workpiece surface, causing excessive pressure and indentations. This phenomenon is particularly prone to occur with softer materials, affecting the appearance of the workpiece and the quality of the riveting. Utility Model Content

[0003] In response to the problems raised in the background art, the purpose of this utility model is to propose a riveting rivet with a riveting stroke limiting function, which can limit the riveting stroke, prevent the riveting stroke limiting part from sinking further during riveting and pressing too deeply on the surface of the workpiece, causing indentations and preventing damage to the workpiece. Moreover, the riveting stroke has good consistency, which solves the technical problem of existing riveting rivets pressing too deeply on the surface of the workpiece during riveting, causing indentations and affecting the appearance of the workpiece and the riveting quality.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A rivet with a flower-shaped stroke limiting function includes a rivet core and a rivet shell. The rivet core includes a rivet core body, a break-off section, a riveting section, and a rivet head. The break-off section is connected between the rivet core body and the riveting section. The rivet head is connected to the end of the riveting section away from the rivet core body. The rivet head has multiple flower-shaped ridges evenly distributed circumferentially. The nail shell includes a nail shell body and a nail head. The nail shell body includes a flowering section and a clamping section. The clamping section is connected to the end of the flowering section, and the nail head is connected to the end of the clamping section away from the flowering section. The end of the clamping section connected to the flowering section is provided with a flowering stroke limiting part. The opening stroke limiting part is used to limit the opening stroke during riveting so that the opening stroke ends at the connection between the opening segment and the opening stroke limiting part, and the connection between the opening segment and the opening stroke limiting part is on the same horizontal plane; The opening section, the clamping section, and the nail head are all provided with through holes for the nail core to pass through.

[0005] To further explain, the wall thickness of the flowering stroke limiting part gradually increases from the connection point with the flowering segment to the direction away from the flowering segment.

[0006] To further explain, the outer diameter L1 of the flowering section is smaller than the outer diameter L2 of the clamping section, and the flowering stroke limiting part includes a stepped inclined surface. The stepped inclined surface is arranged circumferentially around the clamping section, and the outer diameter of the stepped inclined surface gradually increases from the connection point with the flowering section to the direction away from the flowering section. The through hole includes a first inner hole and a second inner hole that are connected. The second inner hole is located near the nail head. The diameter D1 of the first inner hole is larger than the diameter D2 of the second inner hole. The connection between the first inner hole and the second inner hole is located at the connection between the flowering segment and the flowering stroke limiting part.

[0007] To further explain, the wall thickness of the flowering section is 0.4 to 0.6 mm smaller than the maximum wall thickness of the flowering stroke limiting part.

[0008] Furthermore, the through hole also includes a countersunk hole, the second inner hole extends into the interior of the nail head, the countersunk hole is provided at the end of the nail head away from the nail head, and the countersunk hole is connected to the second inner hole.

[0009] To further explain, the outer circumferential surface of the riveting section is provided with riveting bevel teeth, and when the nail core and the nail shell are riveted together, the riveting bevel teeth are in interference fit with the wall surface of the second inner hole.

[0010] To further explain, the nail head has an abutting surface, which faces the nail shell body.

[0011] To further explain, the fracture section is provided with a fracture opening, which is recessed towards the interior of the fracture section.

[0012] Compared with the prior art, the embodiments of this utility model have the following beneficial effects: 1. By setting a flower stroke limiting part at the end where the clamping section connects to the flower section, the flower stroke limiting part can limit the flower stroke during riveting, so that the flower stroke ends at the connection between the flower section and the flower stroke limiting part. This can limit the flower stroke, and after the flower section completes the flowering, it abuts against the upper surface of the workpiece above. This prevents the flower stroke limiting part from being cut by the flower edge during riveting and continuing to sink, which would cause excessive pressure on the surface of the workpiece and result in indentations, thus avoiding damage to the workpiece. 2. The connection between the flower segment and the flower stroke limit part is on the same horizontal plane, so that the flower stroke of the flower segment is consistent during riveting, and the overall appearance performance of the product is consistent after riveting is completed; 3. By setting riveting bevel teeth in the riveting section, when the rivet core and the rivet shell are riveted, the riveting bevel teeth are interference-fitted with the wall of the second inner hole. The second inner hole is located in the clamping part. The clamping part clamps the riveting section of the rivet core through the second inner hole, so that the rivet core is clamped inside the rivet shell, preventing the rivet core from loosening or falling off, and preventing abnormal noise from the workpiece during use. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the core structure of a rivet with a flower-shaped stroke limiting function, according to an embodiment of this utility model.

[0014] Figure 2 This is a cross-sectional view of the rivet shell of a pull rivet with a flower-shaped stroke limiting function, according to an embodiment of this utility model.

[0015] Figure 3 This is a cross-sectional view of the rivet shell of a pull rivet with a flower-shaped stroke limiting function, according to an embodiment of this utility model.

[0016] Figure 4 This is a schematic diagram of the structure of a pull rivet with a flower-shaped stroke limiting function according to an embodiment of the present invention (when the rivet core and rivet shell are assembled).

[0017] Figure 5 This is a schematic diagram of the assembly structure of a pull rivet with a flower-shaped stroke limiting function and two workpieces to be fixed, according to an embodiment of this utility model.

[0018] Figure 6 yes Figure 5 Enlarged view of point A.

[0019] Figure 7 This is a partial cross-sectional view of the completed riveting of a flower-shaped rivet with a flower-shaped stroke limiting function, according to an embodiment of this utility model.

[0020] In the attached diagram: 1-nail core, 11-nail core body, 12-break-off section, 121-break-off point, 13-riveting section, 131-riveting bevel tooth, 14-nail head, 141-flowering ridge, 2-nail shell, 21-nail shell body, 211-flowering section, 212-clamping section, 2121-flowering stroke limit part, 2122-step slope, 22-nail cap, 221-abutting surface, 23-through hole, 231-first inner hole, 232-second inner hole, 233-countersunk hole, 3-workpiece, 31-preset hole. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0022] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish descriptive features, without any order or emphasis.

[0023] like Figures 1 to 7 As shown, a rivet with a flower-shaped stroke limiting function includes a rivet core 1 and a rivet shell 2. The rivet core 1 includes a rivet core body 11, a break-off section 12, a riveting section 13, and a rivet head 14. The break-off section 12 is connected between the rivet core body 11 and the riveting section 13. The rivet head 14 is connected to the end of the riveting section 13 away from the rivet core body 11. The rivet head 14 has a plurality of flower-shaped ridges 141 evenly distributed circumferentially. The nail shell 2 includes a nail shell body 21 and a nail head 22. The nail shell body 21 includes a flowering section 211 and a clamping section 212. The clamping section 212 is connected to the end of the flowering section 211. The nail head 22 is connected to the end of the clamping section 212 away from the flowering section 211. The end of the clamping section 212 connected to the flowering section 211 is provided with a flowering stroke limiting part 2121. The flowering stroke limiting part 2121 is used to limit the flowering stroke during riveting so that the flowering stroke ends at the connection between the flowering segment 211 and the flowering stroke limiting part 2121, and the connection between the flowering segment 211 and the flowering stroke limiting part 2121 is on the same horizontal plane; The opening section 211, the clamping section 212, and the nail head 22 are all provided with a through hole 23 for the nail core 1 to pass through.

[0024] In use, the nail shell body 21 of the nail shell 2 is passed through the preset holes 31 of the two workpieces 3 to be fixed, and the nail core 1 is passed through the through hole 23 of the nail shell 2 to complete the assembly of the nail core 1 and the nail shell 2. Riveting is performed by riveting tools such as rivet guns. During the riveting process, the flower rib 141 cuts the flower segment 211 into a petal shape. The flower segment 211 cut into a petal shape sinks down and abuts against the upper surface of the workpiece 3, while the nail head 22 abuts against the lower surface of the other workpiece 3, thereby completing the riveting.

[0025] like Figure 5 As shown, the rivet with a flower-shaped stroke limiting function completes the assembly with the workpiece 3 to be fixed. When using the riveting tool, the rivet core 1 moves towards the rivet shell 2. Under the cutting action of the flower-shaped ridge 141, the flower-shaped segment 211 flowers out, as shown. Figure 6 As shown, the breakage section 12 of the nail core 1 breaks off, the nail core body 11 breaks off and detaches, and the opening section 211 of the nail shell 2 completes the opening and abuts against the upper surface of the workpiece 3, thereby completing the fixation of the two workpieces 3.

[0026] In this rivet with a limited opening stroke function, the opening stroke limiting part 2121 is provided at the end where the clamping section 212 connects to the opening section 211. The opening stroke limiting part 2121 can limit the opening stroke during riveting, so that the opening stroke ends at the connection between the opening section 211 and the opening stroke limiting part 2121. This limits the opening stroke, and after the opening section 211 completes its opening, it abuts against the upper surface of the workpiece 3 located above. This prevents the opening stroke limiting part 2121 from being cut by the opening ridge 141 during riveting and continuing to sink, which would cause excessive pressure on the surface of the workpiece 3 and result in indentations, thus avoiding damage to the workpiece 3.

[0027] Furthermore, the connection between the flowering segment 211 and the flowering stroke limiting part 2121 is on the same horizontal plane, so that the flowering stroke of the flowering segment 211 is consistent during riveting, and the overall appearance performance of the product is consistent after riveting is completed.

[0028] The described pull rivet with a limiting function for the riveting stroke can limit the riveting stroke, preventing the limiting part 2121 from continuing to sink during riveting and causing excessive pressure on the surface of the workpiece 3, thus avoiding damage to the workpiece 3. Furthermore, it ensures good consistency of the riveting stroke, solving the technical problem of existing pull rivets causing excessive pressure on the surface of the workpiece 3 during riveting, resulting in indentations and affecting the appearance and riveting quality of the workpiece 3. This pull rivet is more suitable for connecting and fixing workpieces 3 made of softer materials (softer materials are more prone to excessive pressure and indentations on the surface of the workpiece 3 during riveting), such as the connection and fixing of automotive interior air ducts, and the connection and fixing of plastic parts, filler boards, fiberboard, cardboard, and rubber in decorative applications.

[0029] To further explain, the wall thickness of the flowering stroke limiting part 2121 gradually increases from the connection point with the flowering segment 211 to the direction away from the flowering segment 211.

[0030] By setting the wall thickness of the flowering stroke limiting part 2121 to gradually increase from the connection point with the flowering segment 211 to the direction away from the flowering segment 211, the flowering segment 211 is more easily cut by the flowering ridge 141 during riveting to achieve the flowering effect. The wall thickness of the flowering stroke limiting part 2121 is increased compared to the wall thickness of the flowering segment 211, making it difficult for the flowering ridge 141 to continue cutting the flowering stroke limiting part 2121. This prevents the flowering stroke limiting part 2121 from being cut by the flowering ridge 141 and continuing to sink, thereby avoiding excessive compression of the workpiece 3 by the riveting rivet.

[0031] To further explain, the outer diameter L1 of the flowering section 211 is smaller than the outer diameter L2 of the clamping section 212. The flowering stroke limiting part 2121 includes a stepped inclined surface 2122, which is arranged circumferentially around the clamping section 212. The outer diameter of the stepped inclined surface 2122 gradually increases from the connection point with the flowering section 211 to the direction away from the flowering section 211. The through hole 23 includes a first inner hole 231 and a second inner hole 232 that are connected. The second inner hole 232 is located close to the nail head 22. The diameter D1 of the first inner hole 231 is larger than the diameter D2 of the second inner hole 232. The connection between the first inner hole 231 and the second inner hole 232 is located at the connection between the flowering section 211 and the flowering stroke limiting part 2121.

[0032] By setting the outer diameter L1 of the flower section 211 to be smaller than the outer diameter L2 of the clamping section 212, and the diameter D1 of the first inner hole 231 to be larger than the diameter D2 of the second inner hole 232, since the connection between the first inner hole 231 and the second inner hole 232 is set at the connection between the flower section 211 and the flower stroke limiting part 2121, the wall thickness of the flower stroke limiting part 2121 gradually increases from the connection with the flower section 211 to the direction away from the flower section 211. The increase in the wall thickness of the flower stroke limiting part 2121 causes the flower stroke during riveting to end at the connection between the flower section 211 and the flower stroke limiting part 2121, thereby determining the flower length of the pull rivet.

[0033] During riveting, the outward opening of the opening section 211 causes the end of the clamping section 212 connected to the opening section 211 (i.e., the opening stroke limiting part 2121) to tend to flare outwards. By providing the stepped inclined surface 2122, since the outer diameter of the stepped inclined surface 2122 gradually increases from the end near the opening section 211 to the end away from the opening section 211, such as... Figure 6 As shown, the lower outer peripheral surface of the clamping section 212 abuts against the wall surface of the preset hole 31 of the workpiece 3, while the opening stroke limiting part 2121 has a certain gap with the wall surface of the preset hole 31, such as Figure 7 As shown, after the riveting process is complete, the riveting stroke limiting part 2121 also flips outward to abut against the wall of the preset hole 31 of the workpiece 3 during riveting, effectively improving the stability of the riveting structure. If the connection between the riveting section 211 and the riveting stroke limiting part 2121 is directly set at a right angle (instead of an inclined plane), the thicker wall of the riveting stroke limiting part 2121 may be squeezed and deformed by the riveting outward force, affecting the appearance of the riveted product.

[0034] Preferably, the wall thickness of the flowering section 211 is 0.4 to 0.6 mm smaller than the maximum wall thickness of the flowering travel limiting part 2121.

[0035] Specifically, the stepped inclined surface 2122 of the flowering stroke limiting part 2121 has a conical structure. By setting the wall thickness of the flowering section 211 to be smaller than the maximum wall thickness of the flowering stroke limiting part 2121, the difference in wall thickness can limit the flowering stroke, making it difficult for the flowering ridge 141 to continue cutting the flowering stroke limiting part 2121. After the riveting is completed, the flowering stroke limiting part 2121 will not continue to flower and sink.

[0036] Preferably, the outer diameter L1 of the flowering section 211 is 4.15~4.25mm, the outer diameter L2 of the clamping section 212 is 4.9~5mm, the diameter D1 of the first inner hole 231 is 2.85~2.95mm, and the diameter D2 of the second inner hole 232 is 2.65~2.75mm.

[0037] To further explain, the length of the flowering segment 211 and the length of the first inner hole 231 can be designed according to the required length of the flowering petals.

[0038] Furthermore, the through hole 23 also includes a countersunk hole 233, the second inner hole 232 extends into the interior of the nail head 22, the countersunk hole 233 is provided at the end of the nail head 22 away from the nail head 14, and the countersunk hole 233 is connected to the second inner hole 232.

[0039] By extending the second inner hole 232 into the interior of the nail head 22 and providing the countersunk hole 233, it is convenient for the nail core 1 to be inserted into the nail shell 2.

[0040] To further explain, the outer circumferential surface of the riveting section 13 is provided with riveting oblique teeth 131. When the nail core 1 and the nail shell 2 are riveted together, the riveting oblique teeth 131 are in interference fit with the wall surface of the second inner hole 232.

[0041] By providing the riveting bevel teeth 131 in the riveting section 13, when the nail core 1 and the nail shell 2 are riveted together, the riveting bevel teeth 131 are interference-fitted with the wall surface of the second inner hole 232. The second inner hole 232 is located inside the clamping section 212. The clamping section 212 clamps the riveting section 13 of the nail core 1 through the second inner hole 232, so that the nail core 1 is clamped inside the nail shell 2, preventing the nail core 1 from loosening or falling off, and preventing abnormal noise from the workpiece 3 during use.

[0042] Specifically, the nail head 22 is provided with an abutting surface 221, which is disposed facing the nail shell body 21.

[0043] The abutting surface 221 is used to abut against the surface of the workpiece 3 to be fixed. When the nail shell body 21 is inserted into the preset hole 31 of the workpiece 3 to be fixed, the abutting surface 221 abuts against the surface of the workpiece 3 to be fixed. After the riveting is completed, the abutting surface 221 is tightly bonded to the surface of the workpiece 3, effectively ensuring the stability of the riveting structure.

[0044] Specifically, the tensile section 12 is provided with a tensile opening 121, which is recessed toward the interior of the tensile section 12.

[0045] By providing the breakage point 121 in the breakage section 12, and because the breakage point 121 is recessed towards the inside of the breakage section 12, the rivet core 1 breaks through the breakage point 121 during riveting and detaches from the rivet core body 11. The rivet shell 2 then forms a knot and abuts against the surface of the workpiece 3, thereby fixing the two workpieces 3. The breakage point 121 ensures that the breaking force of the rivet core 1 is balanced and consistent, and the breakage position is consistent, thus improving the quality of the riveting rivet. Specifically, the breakage point 121 is formed by thread rolling.

[0046] Preferably, the rivet core 1 is made of medium carbon steel and is cold-forged. The outer circumferential surface of the riveting section 13 is formed by riveting the riveting teeth 131 by rolling the teeth, so that the diameter of the riveting teeth 131 is larger than the diameter of the rivet core body 11. This allows the rivet shell 2 and the rivet core 1 to be tightly connected after the rivet is assembled, preventing the rivet shell 2 from separating from the rivet core 1. When the riveting is completed, the riveting teeth 131 are interference-fitted with the wall of the second inner hole 232, so that the rivet core 1 is clamped inside the rivet shell 2.

[0047] The nail shell 2 is made of aluminum alloy, which has high corrosion resistance and mechanical properties. The connection structure between the opening section 211 and the clamping section 212, as well as the connection structure between the first inner hole 231 and the second inner hole 232, are all made by cold heading mold to ensure accuracy and riveting effect.

[0048] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A pull rivet with a flower-shaped travel limiting function, characterized in that, It includes a nail core and a nail shell. The nail core includes a nail core body, a breakable section, a riveting section, and a nail head. The breakable section is connected between the nail core body and the riveting section. The nail head is connected to the end of the riveting section away from the nail core body. The nail head has multiple serrations evenly distributed around its circumference. The nail shell includes a nail shell body and a nail head. The nail shell body includes a flowering section and a clamping section. The clamping section is connected to the end of the flowering section, and the nail head is connected to the end of the clamping section away from the flowering section. The end of the clamping section connected to the flowering section is provided with a flowering stroke limiting part. The opening stroke limiting part is used to limit the opening stroke during riveting so that the opening stroke ends at the connection between the opening segment and the opening stroke limiting part, and the connection between the opening segment and the opening stroke limiting part is on the same horizontal plane; The flowering section, the clamping section, and the nail head are all provided with through holes for the nail core to pass through.

2. The pull rivet with a flower-shaped stroke limiting function according to claim 1, characterized in that, The wall thickness of the flowering travel limiting part gradually increases from the connection point with the flowering segment to the direction away from the flowering segment.

3. The pull rivet with a flower-shaped stroke limiting function according to claim 2, characterized in that, The outer diameter L1 of the flowering section is smaller than the outer diameter L2 of the clamping section. The flowering stroke limiting part includes a stepped inclined surface. The stepped inclined surface is arranged circumferentially around the clamping section. The outer diameter of the stepped inclined surface gradually increases from the connection point with the flowering section to the direction away from the flowering section. The through hole includes a first inner hole and a second inner hole that are connected. The second inner hole is located near the nail head. The diameter D1 of the first inner hole is larger than the diameter D2 of the second inner hole. The connection between the first inner hole and the second inner hole is located at the connection between the flowering segment and the flowering stroke limiting part.

4. The pull rivet with a flower-shaped stroke limiting function according to claim 2, characterized in that, The wall thickness of the flowering section is 0.4 to 0.6 mm smaller than the maximum wall thickness of the flowering travel limiting part.

5. The pull rivet with a flower-shaped stroke limiting function according to claim 3, characterized in that, The through hole also includes a countersunk hole, the second inner hole extends into the interior of the nail head, the countersunk hole is provided at the end of the nail head away from the nail head, and the countersunk hole is connected to the second inner hole.

6. The pull rivet with a flower-shaped stroke limiting function according to claim 3, characterized in that, The outer circumferential surface of the riveting section is provided with riveting oblique teeth. When the nail core and the nail shell are riveted together, the riveting oblique teeth are interference-fitted with the wall surface of the second inner hole.

7. The pull rivet with a flower-shaped stroke limiting function according to claim 1, characterized in that, The nail head has an abutting surface, which faces the nail shell body.

8. The pull rivet with a flower-shaped stroke limiting function according to claim 1, characterized in that, The fracture section is provided with a fracture opening, which is recessed towards the interior of the fracture section.

Images