Novel grounding welding bolt assembly

Abstract

A novel grounding welding bolt assembly comprises a screw rod and a nut. The screw rod is of an integrated columnar structure and comprises a rod body, a head portion and a tip portion. The nut is of an integrated cylindrical structure, a bottom is arranged at one end of a cylinder body, and a screw insertion opening is formed in the other end of the cylinder body. The bottom is formed through a cold heading technology and is integrally formed with the barrel body of the nut. Compared with the prior art, the novel grounding welding bolt assembly provided by the utility model is provided with the welding end, so that the screw rod can be conveniently welded on a steel plate or a grounding wire, the grounding of a fixed line is realized, the welding is convenient, and the operation is simple. The nut is arranged, the cold heading technology is adopted for integrated forming, the industry that the nut and the hexagonal top are connected in a welded mode in the prior art is replaced, the influence of the welding industry and the polishing industry on the production efficiency is avoided, the risk that the nut and the hexagonal top are disengaged due to the fact that welding is not in place is effectively prevented, and it is guaranteed that the product is firm and durable.

Description

Technical Field

[0001] The utility model relates to the technical field of bolts, in particular to a novel grounding welding bolt assembly. Background Art

[0002] With the development of automobile technology, the safety of automobile circuit systems has also attracted increasing attention. Reasonable layout of the grounding points of the entire vehicle can ensure the balance of the vehicle's electrical potential. While meeting the basic electrical functional requirements, it is more conducive to the electrical safety of each module, avoiding potential offset, and circumventing electromagnetic interference.

[0003] Using grounding welding bolts as line fixed wiring guides to connect various electrical appliances is the preferred solution to ensure the potential balance of each appliance. This installation method has high requirements for the grounding welding bolt assembly: in particular, the verticality and position of the bolt welding must be high, and there must be no cold soldering.

[0004] For example, Chinese utility model CN201410117164.2 discloses a grounding welding bolt assembly for thin plates of 0.6 mm and above, comprising a grounding welding bolt and a flange sheath nut; the grounding welding bolt comprises a welding melting point, a flange, an octagonal shaft shoulder for connecting a cable and a screw with an external thread; the flange sheath nut comprises an internal thread corresponding to the external thread of the screw, and the flange sheath nut is screwed onto the grounding welding bolt, and the flange mating surfaces of the two fit tightly; its characteristic is that the welding melting point of the grounding welding bolt comprises a twelve-sided cylindrical welding head, and the end of the cylindrical welding head is an arc starting area, specifically, the upper part of the cylindrical welding head is a frustum, and the top of the cylindrical welding head is an arc.

[0005] The hexagonal top of the nut and the main body of the nut are connected by welding. On the one hand, the production process is relatively complicated, requiring many steps such as welding and grinding, resulting in high production costs; on the other hand, the welding industry has high requirements and needs to ensure the connection strength of the nut. Summary of the Invention

[0006] In view of this, the utility model provides a novel grounding welding bolt assembly to solve the above technical problems.

[0007] A new type of grounding welding bolt assembly, which includes a screw and a nut into which the screw is inserted. The screw is an integrated columnar structure and includes a rod body, a head located at one end of the rod body, and a tip located at the other end of the rod body. The diameter of the tip is smaller than the diameter of the rod body. Guide bevels are provided on the free end of the tip and at the connection between the tip and the rod body. The nut is an integrated cylindrical structure and has a bottom provided at one end of the barrel and a screw socket provided at the other end. The bottom closes one end of the nut. The bottom is formed by cold heading technology and is integrally formed with the barrel body of the nut. The screw socket is an opening of the cylindrical structure of the nut and is located at the other end of the nut away from the bottom.

[0008] Furthermore, the rod body is made of metal or alloy material and is provided with a circle of external thread.

[0009] Furthermore, the head includes an external hexagonal head and a welding end arranged on one side of the external hexagonal head.

[0010] Furthermore, the diameter of the external hexagonal head is larger than the diameter of the rod body, the welding end is located on the side of the external hexagonal head away from the rod body, is a columnar structure, and the end surface of the free end is set as an arc surface.

[0011] Furthermore, the nut is made of metal or alloy, and the inner wall is provided with a circle of internal threads, which are matched with the external threads of the rod body.

[0012] Furthermore, the nut further includes an outer hexagonal wall provided on the barrel body close to the bottom, and a circle of engaging steps provided on the edge of the barrel body close to the screw socket.

[0013] Furthermore, the outer hexagonal wall is provided on the outer surface of the barrel of the nut and is located at one end close to the bottom, and the cross-sectional shape of the outer wall in the radial direction is a hexagon.

[0014] Furthermore, the engaging step is provided on the outer surface of the barrel of the nut and is a ring-shaped protrusion and is located near the end of the screw socket.

[0015] Compared to the prior art, the new grounding weld bolt assembly provided by the present invention facilitates welding the screw to a steel plate or grounding wire by providing a welding end, thereby achieving grounding of the fixed circuit and ensuring potential balance within the vehicle. Welding is convenient and simple to operate. Furthermore, by providing the nut, the assembly is integrally formed using cold heading technology, replacing the prior art method of welding the nut and hexagonal head together. This eliminates the impact of welding and grinding on production efficiency and effectively prevents the risk of detachment between the nut and hexagonal head due to improper welding, ensuring a strong and durable product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a new grounding welding bolt assembly provided by the utility model.

[0017] Figure 2 for Figure 1 Schematic diagram of the separated structure of the new grounding welding bolt assembly.

[0018] Figure 3 for Figure 1 Schematic cross-section of a new grounding weld bolt assembly. DETAILED DESCRIPTION

[0019] The following is a further detailed description of specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the scope of protection of the present invention.

[0020] like Figures 1 to 3 , which is a schematic structural diagram of the novel grounding weld bolt assembly provided by the present invention. The novel grounding weld bolt assembly includes a screw 10 and a nut 20 inserted into the screw 10. It is conceivable that the novel grounding weld bolt assembly may also include other functional modules, such as a gasket placed between the screw 10 and the nut 20, the head shape of the screw 10, etc. These are well known to those skilled in the art and will not be detailed here.

[0021] The screw rod 10 is an integrated columnar structure and includes a rod body 11 , a head 12 located at one end of the rod body 11 , and a tip 13 located at the other end of the rod body 12 .

[0022] The rod body 11 is made of metal or alloy material and is provided with a circle of external thread to be connected to the nut 20 through a threaded structure. The threaded structure is an existing technology widely used in the field of fasteners and should be well known to those skilled in the art. Therefore, it is only briefly described here and is not illustrated in the drawings of the specification.

[0023] The head 12 includes an external hexagonal head 121 and a welding end 122 disposed on one side of the external hexagonal head 121. The diameter of the external hexagonal head 121 is larger than that of the shaft 11, and the outer wall has a hexagonal shape in a radial cross-section, facilitating the screw 10 to be screwed into the nut 20 using a tool such as a wrench. The welding end 122 is located on the side of the external hexagonal head 121 away from the shaft 11 and is a columnar structure. The end surface of the free end is configured as an arcuate surface, facilitating the vertical welding of the screw 10 to a steel plate.

[0024] The tip 13 is disposed at the other end of the shaft 11 away from the head 12. The diameter of the tip 13 is smaller than the diameter of the shaft 11. Guide slopes are provided on the free end of the tip 13 and at the connection between the tip 13 and the shaft 11 to guide the screw 10 when it is inserted into the nut 20.

[0025] The nut 20 is an integrated cylindrical structure, and is provided with a bottom 21 at one end of the barrel and a screw socket 22 at the other end. It also includes an outer hexagonal wall 23 provided on the barrel near the bottom 21, and a circle of clamping steps 24 provided on the edge of the barrel near the screw socket 21.

[0026] The nut 20 is made of metal or alloy by cold heading technology, and has an inner wall provided with a circle of internal threads, which match the external threads of the rod body 11 to form a threaded connection. The screw rod 11 is screwed into the nut 20 to tighten it.

[0027] The bottom 21 closes one end of the nut 20 to form a structure with a single-side opening. The bottom 21 is formed by cold heading technology and is integrally formed with the barrel of the nut 20 to avoid the need for welding in the later stage, which leads to an increase in the grinding process, and at the same time helps to strengthen the structural strength. The cold heading process is one of the new processes for metal pressure processing with little or no cutting. It is a processing method that utilizes the plastic deformation of metal under the action of external force, and with the help of a mold, redistributes and transfers the metal volume to form the required parts or blanks. The cold heading process is most suitable for the production of standard fasteners such as bolts, screws, nuts, rivets, pins, etc. It is itself an existing technology and should be well known to those skilled in the art, so only a brief description is given here.

[0028] The screw socket 22 is an opening of the cylindrical structure of the nut 20 , located at the other end of the nut 20 away from the bottom 21 , and an inclined chamfer may be provided at the opening to facilitate the insertion of the screw 10 .

[0029] The outer hexagonal wall 23 is arranged on the outer surface of the barrel of the nut 20 and is located at one end close to the bottom 21. The shape of the outer wall in the radial cross section is hexagonal, so that when the bolt 10 is screwed into the nut 20, it is easy to clamp it with tools such as a wrench.

[0030] The engaging step 24 is provided on the outer surface of the barrel of the nut 20 and is a ring-shaped protrusion. The step 24 is located near the end of the screw socket 21 to support and fix objects such as gaskets that the screw 10 passes through.

[0031] Compared to the prior art, the new grounding weld bolt assembly provided by the present invention facilitates welding the screw 10 to a steel plate or grounding wire by providing the welding end 122, thereby achieving grounding of the fixed circuit and ensuring potential balance within the vehicle. The assembly also facilitates welding and is simple to operate. Furthermore, the nut 20 is provided and integrally formed using cold heading technology, replacing the prior art method of welding the nut and hexagonal head together. This eliminates the impact of welding and grinding on production efficiency and effectively prevents the risk of detachment between the nut and hexagonal head due to improper welding, ensuring a strong and durable product.

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements or improvements within the spirit of the present invention are included in the scope of the claims of the present invention.

Claims

1. A new type of grounding welding bolt assembly, characterized by: The new grounding welding bolt assembly includes a screw and a nut in which the screw is inserted. The screw is an integrated columnar structure and includes a rod body, a head located at one end of the rod body, and a tip located at the other end of the rod body. The diameter of the tip is smaller than the diameter of the rod body. Guide slopes are provided on the free end of the tip and at the connection between the tip and the rod body. The nut is an integrated cylindrical structure and has a bottom at one end of the barrel and a screw socket at the other end. The bottom closes one end of the nut. The bottom is formed by cold heading technology and is integrally formed with the barrel body of the nut. The screw socket is the opening of the cylindrical structure of the nut and is located at the other end of the nut away from the bottom.

2. The novel grounding welding bolt assembly according to claim 1, characterized in that: The rod body is made of metal or alloy material and is provided with a circle of external threads.

3. The novel grounding welding bolt assembly according to claim 1, characterized in that: The head includes an external hexagonal head and a welding end arranged on one side of the external hexagonal head.

4. The novel grounding welding bolt assembly according to claim 3, characterized in that: The diameter of the outer hexagonal head is larger than the diameter of the rod body. The welding end is located on a side of the outer hexagonal head away from the rod body and is a columnar structure. The end surface of the free end is arranged as an arc surface.

5. The novel grounding welding bolt assembly according to claim 2, characterized in that: The nut is made of metal or alloy, and the inner wall is provided with a circle of internal threads that match the external threads of the rod body.

6. The novel grounding welding bolt assembly according to claim 1, characterized in that: The nut further comprises an outer hexagonal wall arranged on the barrel body close to the bottom, and a circle of clamping steps arranged on the edge of the barrel body close to the screw rod socket.

7. The novel grounding welding bolt assembly according to claim 6, characterized in that: The outer hexagonal wall is arranged on the outer surface of the barrel of the nut and is located at one end close to the bottom. The cross-sectional shape of the outer wall in the radial direction is a hexagon.

8. The novel grounding welding bolt assembly according to claim 6, characterized in that: The clamping step is arranged on the outer surface of the barrel of the nut, is a circle of annular protrusions, and is located near the end of the screw socket.

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