High-bearing-capacity type pressing rivet bolt

Abstract

According to the technical scheme, the high-bearing-capacity pressing rivet bolt is characterized in that the high-bearing-capacity pressing rivet bolt comprises a connecting column, the bottom of the connecting column is fixedly connected with a threaded prefabricated column used for engraving threads, and the top of the connecting column is fixedly connected with a plurality of first abutting pieces distributed in an annular array; the first abutting pieces are connected with a bolt head used for being screwed by a screwdriver, the outer diameter of the threaded prefabricated column is larger than the longest length between the two symmetrically-arranged first abutting pieces, and an outer empty groove communicated to the outer side of the connecting column and a flow channel extending towards the bolt head are formed in the connecting column. The outer diameter of the threaded prefabricated column is larger than the longest length between the two symmetrically-arranged first abutting pieces, enough gaps can be reserved to form a complete buffering layer, and therefore the purposes that buffering is formed between the pressing rivet bolt and a material, and threads are prevented from being damaged due to too high shearing force are achieved.

Description

Technical Field

[0001] The utility model relates to a press riveting bolt, and more specifically to a high load-bearing press riveting bolt. Background Art

[0002] A press riveting bolt, also called a press riveting screw, is a fastener used for press riveting. Press riveting bolts are generally used in products in the automotive body sheet metal industry, hardware stamping, or materials such as copper, aluminum, plastic, etc. When installing, the threaded end of the press riveting bolt needs to be pressed into the product material matrix through stamping or other extrusion methods, and then the press riveting bolt is rotated and connected into the material through the thread. That is, the press riveting bolt itself plays the role of opening a threaded hole, and various materials are fixed to each other through the press riveting bolt, and a suitable installation position is selected according to requirements. However, it is found in actual use that due to the integration of multiple functions in the press riveting bolt itself, the actual strength is affected, and the threaded hole in the material is directly generated by the press riveting bolt, making the press riveting bolt fit tightly with the material. There is a lack of buffering under high load, and the shear force on the thread is relatively large, which easily causes thread breakage and wear. Therefore, a high load-bearing press riveting bolt is needed, and this device can form a buffer between the press riveting bolt and the material to avoid the thread being damaged by excessive shear force.

[0003] Combined with the above reasons, how to form a buffer between the press riveting bolt and the material is exactly the problem considered in this application. Summary of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, a high load-bearing press riveting bolt is provided, and this device can form a buffer between the press riveting bolt and the material to avoid the thread being damaged by excessive shear force.

[0005] To achieve the above object, the following technical solution is provided: A high load-bearing press riveting bolt includes a connecting column, a thread prefabrication column for engraving threads is fixedly connected to the bottom of the connecting column, a plurality of first abutting members distributed in a circular array are fixedly connected to the top of the connecting column, the first abutting members are connected to a bolt head for screwdriver rotation, the outer diameter of the thread prefabrication column is greater than the longest length between two symmetrically arranged first abutting members, and an outer empty groove communicating to the outside of the connecting column and a flow channel extending towards the bolt head are provided in the connecting column.

[0006] In summary, the above technical solutions have the following beneficial effects: Rivet bolts are usually used as permanent connection components and are not usually considered for disassembly and reuse. Therefore, in actual construction, a method of injecting glue and encapsulating is used to maintain the stability of the connection. Moreover, the glue can adhere to the entire rivet bolt along the threads, thereby forming a buffer layer. The buffer layer only needs to be formed partially, that is, it can span the joints of various materials. However, since the rivet bolt is tightly fitted to the material, this buffer layer cannot be effectively formed. Therefore, in the present utility model, the connecting column is used as the component for bearing the joints of various materials, rather than the threaded part in the prior art. This can avoid the situation where the glue cannot penetrate smoothly due to excessive tight fitting at the threaded part, thereby better forming the buffer layer;

[0007] After injecting glue, the part of the rivet bolt that penetrates into the material has become an integral part. Therefore, the top of the rivet bolt will also be cut off to form a hidden connection component, making the material surface smooth. However, this is equivalent to completely destroying the later use value of the rivet bolt. Even if the colloid is dissolved with a sol solution, it is difficult to remove the rivet bolt. Therefore, in the present utility model, a detachable first abutting member and a bolt head are provided. On the one hand, in further processing, the screwdriver threads on the surface of the bolt head can be customized according to the use requirements, so that the bolt head can be reused to save costs. On the other hand, after removing the bolt head, there will be no protrusions on the material surface, making the material surface smooth and forming a hidden connection component;

[0008] After detaching the bolt head, glue is injected through the flow channel. And because the outer diameter of the threaded prefabricated column is greater than the longest length between two symmetrically arranged first abutting members, the first abutting members will also be hidden under the material surface, and a stable gap can be formed between the connecting column and the inner wall of the material. The colloid can also form a plug-in structure at the outer groove, thereby strengthening the stability of the connection;

[0009] In addition, the threads of the threaded prefabricated column can be customized according to the use requirements in further processing, so as to adapt to different materials;

[0010] The present utility model uses the connecting column as the connection medium, and the outer diameter of the threaded prefabricated column is greater than the longest length between two symmetrically arranged first abutting members, which can leave enough gaps to form a complete buffer layer, thereby achieving buffering between the rivet bolt and the material and avoiding the purpose of the threads being damaged by excessive shear force. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a three-dimensional structural schematic diagram of the connecting column in the present utility model;

[0012] Figure 2 is a three-dimensional structural schematic diagram of the bolt head in the present utility model.

[0013] Reference signs: 1, connecting column; 2, threaded prefabricated column; 3, first abutting member; 4, bolt head; 5, fixing column;

[0014] 11, outer empty groove; 12, flow channel; 13, first groove; 14, second groove;

[0015] 41, knife pattern prefabricated part; 42, first positioning column; 43, second abutting member; 44, second positioning column;

[0016] 51, inner empty groove; 52, through hole. Specific embodiments

[0017] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. The same components are denoted by the same reference signs. It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the accompanying drawings, and the terms "bottom surface" and "top surface", "inner" and "outer" refer to the directions towards or away from the geometric center of a specific component, respectively.

[0018] Refer to Figure 1-2 As shown, a high-load-bearing type riveting bolt includes a connecting column 1. At the bottom of the connecting column 1, there is a threaded prefabricated column 2 for engraving threads. At the top of the connecting column 1, there are a plurality of first abutting members 3 distributed in a circular array. The first abutting members 3 are connected to a bolt head 4 for screwdriver turning. The outer diameter of the threaded prefabricated column 2 is greater than the longest length between two symmetrically arranged first abutting members 3. An outer empty groove 11 communicating with the outside of the connecting column 1 and a flow channel 12 extending towards the bolt head 4 are provided inside the connecting column 1;

[0019] Riveting bolts are usually used as permanent connection components and usually do not consider disassembly and reuse. Therefore, in actual construction, there is a method of injecting glue for encapsulation to maintain the connection stability. And the glue can also fit along the threads to cover the entire riveting bolt, thereby forming a buffer layer. The buffer layer only needs to form a part, that is, it can span the joints of various materials. However, the riveting bolt fits tightly with the materials, and this buffer layer cannot be effectively formed. Therefore, in the present utility model, the connecting column 1 is used as the component for bearing the joints of various materials, rather than the threaded part in the prior art, so as to avoid the situation that the glue cannot penetrate smoothly due to too tight fitting at the thread, thereby better forming the buffer layer;

[0020] After the glue is injected, the part of the self-clinching bolt that penetrates into the material has become a whole, so the top of the self-clinching bolt will be cut off to form a hidden connecting part, so that the surface of the material remains smooth, but this is equivalent to completely destroying the later use value of the self-clinching bolt. Even if the colloid is dissolved by the sol liquid, it is difficult to remove the self-clinching bolt. Therefore, the utility model is provided with a detachable first abutment 3 and a bolt head 4. On the one hand, the screwdriver pattern on the surface of the bolt head 4 can be customized according to the use requirements in further processing, so that the bolt head 4 can be reused to save costs. On the other hand, after the bolt head 4 is removed, there will be no protrusions on the material surface, so that the material surface remains smooth and a hidden connecting part is formed;

[0021] After the bolt head 4 is removed, glue is injected through the flow channel 12. Because the outer diameter of the threaded prefabricated column 2 is greater than the longest length between the two symmetrically arranged first abutment members 3, the first abutment members 3 are also hidden under the surface of the material, and a stable gap can be formed between the connecting column 1 and the inner wall of the material. The glue can also form a plug-in structure at the outer groove 11, thereby enhancing the stability of the connection.

[0022] In addition, the threads of the threaded prefabricated column 2 can be customized according to the use requirements during further processing, so as to adapt to different materials;

[0023] The utility model uses a connecting column 1 as a connecting medium, and the outer diameter of the threaded prefabricated column 2 is greater than the longest length between two symmetrically arranged first interference members 3, which can leave enough space to form a complete buffer layer, thereby achieving the purpose of forming a buffer between the rivet bolt and the material and preventing the thread from being damaged by excessive shear force.

[0024] Furthermore, a first groove 13 is further provided on the top of the connecting column 1, the edge of the first groove 13 is rounded, and the flow channel 12 is provided at the bottom of the first groove 13 toward the bolt head 4;

[0025] Under normal installation conditions, the first resistance member 3 will be inside the drilled threaded hole, so the first resistance member 3 can be completely covered when glue is injected, and the glue can be injected from the flow channel 12 and between the adjacent first resistance members 3 at the same time, so that the glue can fully fill the gap in the threaded hole. Usually, the glue is quickly injected first during glue injection. At this time, the threaded hole may be exhausted or the injection speed may be too fast, causing the glue that has not flowed in to flow on the surface of the material. Therefore, a first groove 13 is provided, so that the glue that has not flowed in can be gathered in the first groove 13 to prevent glue waste, and the rounded edge of the first groove 13 allows the glue to fully contact the inner wall of the first groove 13.

[0026] Furthermore, a fixing column 5 is fixedly connected to the connecting column 1, and an inner hollow groove 51 is provided in the fixing column 5, which is connected to both the outer hollow groove 11 and the flow channel 12, and the notch of the inner hollow groove 51 is smaller than the notch of the outer hollow groove 11;

[0027] A through hole 52 is also provided at the connection between the outer hollow groove 11 and the inner hollow groove 51, and the through hole 52 communicates the outside of the connecting column 1 with the inner hollow groove 51;

[0028] Since the connecting column 1 is mainly used for bearing the bolt itself, it is not suitable to be made into a complex shape. After the glue solidifies, it is necessary to fix the position as much as possible. Considering restricting the shape to make the glue form a stepped shape after solidification, thereby strengthening the connection strength, the fixing column 5 is provided to achieve the purpose through the special shape of the fixing column 5;

[0029] In addition, since the shape of the fixing column 5 is relatively complex and not conducive to the flow of the glue, the through hole 52 is provided to increase the communication path between the outside of the connecting column 1 and the inner hollow groove 51, so that the glue can fill the gap as much as possible before solidification.

[0030] Furthermore, the bolt head 4 includes a knife pattern prefabricated part 41 for engraving knife patterns. The knife pattern prefabricated part 41 is fixedly connected with a first positioning column 42 for being received in the first groove 13, and the first positioning column 42 is fixedly connected with a second abutting part 43 fixedly connected with the knife pattern prefabricated part 41;

[0031] Similar to the function of the thread prefabricated column 2, the knife pattern prefabricated part 41 is also used to adapt to screwdrivers with different head shapes according to actual use requirements and needs to be pre-treated before use. The first positioning column 42 can facilitate the fitting and installation of the bolt head 4. The second abutting part 43 drives the rotation of the connecting column 1 by abutting against the first abutting part 3. In this way, the threaded head can be used like an ordinary press rivet bolt during installation, and the bolt head 4 can be removed only by directly taking it out, which is convenient for users.

[0032] Furthermore, the connecting column 1 is also provided with a second groove 14, and the second groove 14 partially overlaps with the first groove 13. The first positioning column 42 is fixedly connected with a second positioning column 44 for being received in the second groove 14;

[0033] Generally, for the convenience of manufacturing, it is customary to set the inside of the first groove 13 to be cylindrical. Therefore, the first positioning column 42 is also cylindrical. However, during rotation, the first positioning column 42 and the first groove 13 cannot form an effective abutment. Therefore, in order to further strengthen the rotation effect, the second groove 14 is provided to cooperate with the second positioning column 44 to strengthen the rotation effect through abutment from both inside and outside.

[0034] The above is only the preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. A high bearing capacity press riveting bolt, characterized in that It includes a connecting column, a threaded prefabricated column for engraving threads is fixedly connected to the bottom of the connecting column, a plurality of first resistance members distributed in a ring array are fixedly connected to the top of the connecting column, the first resistance members are connected to a bolt head for being twisted by a screwdriver, the outer diameter of the threaded prefabricated column is greater than the longest length between two symmetrically arranged first resistance members, and an outer hollow groove connected to the outside of the connecting column and a flow channel extending toward the bolt head are provided in the connecting column.

2. The high-load-bearing type press riveting bolt according to claim 1, characterized in that, The top of the connecting column is also provided with a first groove, the edge of the first groove is rounded, and the flow channel is provided at the bottom of the first groove toward the bolt head.

3. A high load-bearing type riveting bolt according to claim 1, characterized in that, A fixing column is fixedly connected inside the connecting column, and an inner hollow groove communicating with both the outer hollow groove and the flow channel is arranged inside the fixing column, and the notch of the inner hollow groove is smaller than the notch of the outer hollow groove.

4. The high bearing capacity type riveting bolt according to claim 3, characterized in that, A through hole is also provided at the connection between the outer hollow groove and the inner hollow groove, and the through hole communicates the outer side of the connecting column with the inner hollow groove.

5. The high-load-bearing type press riveting bolt according to claim 2, wherein The bolt head includes a knife pattern preform for engraving knife patterns, the knife pattern preform is fixedly connected to a first positioning column for being accommodated in a first groove, and the first positioning column is fixedly connected to a second abutment member fixedly connected to the knife pattern preform.

6. The high bearing capacity type riveting bolt according to claim 5, characterized in that, The connecting column is further provided with a second groove, the second groove partially overlaps with the first groove, and the first positioning column is fixedly connected to a second positioning column for being accommodated in the second groove.

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