Bolt and vehicle

Abstract

The utility model relates to a bolt and a vehicle. The bolt comprises a head part and a connecting part. The connecting part is connected with the head part along the axis of the bolt and comprises a sawtooth unit arranged close to the head part and a thread unit arranged away from the head part. And in the direction of the axis, the projection area of the head part is larger than that of the connecting part. The sawtooth unit comprises a plurality of sawtooth structures extending in the direction of the axis. And the plurality of sawtooth structures are distributed around the axis. And in the direction from the head part to the connecting part, the sectional areas of the sawtooth units are gradually reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a bolt and a vehicle. Background Art

[0002] Grounding a vehicle means connecting the positive or negative pole of the battery and generator to the vehicle frame, so that the frame is positively or negatively charged, so that the electrical equipment installed on the frame only needs one wire leading from the other pole of the power supply to form a circuit.

[0003] There is an insulating layer on the surface of the frame. When grounding, the assembler needs to destroy the insulating layer on the surface to expose the metal part on the lower side to achieve electrical conduction. However, adding process bolts to destroy the insulating layer in the hole will cause waste of labor and material costs. Destroying the insulating layer on the surface of the frame will also cause subsequent corrosion at the damaged position. Utility Model Content

[0004] The present application provides a bolt and a vehicle to solve some or all of the deficiencies in the related art.

[0005] In a first aspect, the present application provides a bolt, comprising a head and a connecting portion. The connecting portion is connected to the head along the axis of the bolt, and comprises a sawtooth unit arranged close to the head and a threaded unit arranged away from the head. In the direction of the axis, the projection area of ​​the head is larger than the projection area of ​​the connecting portion. The sawtooth unit comprises a plurality of sawtooth structures extending in the direction of the axis. The plurality of sawtooth structures are distributed around the axis. In particular, in the direction from the head to the connecting portion, the cross-sectional area of ​​the sawtooth unit gradually decreases.

[0006] Furthermore, the sawtooth unit comprises a columnar structure; the sawtooth structure is arranged on the surface of the columnar structure around the axis; and the projection of the sawtooth structure in the direction of the axis gradually increases in size in the direction from the sawtooth structure to the columnar structure.

[0007] Furthermore, the connecting portion further comprises a transition unit. The transition unit is connected between the sawtooth unit and the head. In the direction of the axis, the projection area of ​​the sawtooth unit is larger than the projection area of ​​the transition unit.

[0008] Furthermore, the thread unit is directly connected to the sawtooth unit.

[0009] The second aspect of the present application provides a vehicle, comprising a frame, a first nut and the bolt described in the above embodiment. The frame comprises a mounting hole that cooperates with the bolt. The bolt passes through the mounting hole, and the serrated unit abuts against the wall of the mounting hole. The head abuts against a surface of one side of the frame, and the first nut cooperates with the threaded unit and abuts against a surface of the other side of the frame.

[0010] Further, the length of the sawtooth unit along the direction of the axis is smaller than the length of the mounting hole.

[0011] Furthermore, at least a portion of the sawtooth unit is interference fit with the mounting hole.

[0012] Furthermore, the interference between the sawtooth unit and the mounting hole is greater than or equal to 0.5 mm and less than or equal to 1.5 mm.

[0013] Furthermore, the sawtooth unit comprises a column structure, the sawtooth structure is arranged on the surface of the column structure around the axis, and the column structure is separated from the wall surface of the mounting hole.

[0014] Furthermore, the vehicle further comprises a wiring harness and a conductive terminal disposed at an end of the wiring harness. The conductive terminal comprises a conductive plate and an assembly hole disposed on the conductive plate. The assembly hole is sleeved on the threaded unit and abuts against an end of the first nut away from the vehicle frame. The conductive terminal further comprises a flange connected to the conductive plate. The flange abuts against a side surface of the first nut.

[0015] The technical solution provided by the embodiments of the present application may have the following beneficial effects:

[0016] It can be seen from the above embodiments that the provision of the serration unit of the bolt of the present application can more conveniently destroy the insulating layer of the wall of the mounting hole when assembled in the vehicle, without the need to additionally provide process bolts. After the insulating layer is destroyed, the mounting hole contacts with multiple serration structures, forming a good electrical conduction effect, improving the grounding effect of the vehicle, and ensuring the service life of the battery. In addition, the bolt of the present application has a small requirement for the area of ​​​​damage to the insulating layer, and can better prevent the occurrence of wall rust. The gradually decreasing cross-sectional area of ​​the serration unit can also play a role in guiding assembly.

[0017] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the overall structure of the frame of the vehicle of the present application;

[0020] Figure 2 for Figure 1 An enlarged structural schematic diagram of a vehicle frame;

[0021] Figure 3 It is an overall schematic diagram of an embodiment of a bolt of the present application;

[0022] Figure 4 A schematic cross-sectional structure diagram of an embodiment of a serration unit of a bolt of the present application;

[0023] Figure 5 It is a schematic cross-sectional structure diagram of another embodiment of the serration unit of the bolt of the present application.

[0024] Description of reference numerals:

[0025] 1 bolt, 11 head, 12 connecting part, 121 serrated unit, 121a serrated structure, 121b column structure, 122 threaded unit, 123 transition unit, 2 frame, 21 mounting hole, 3 first nut, 4 conductive terminal, 5 second nut, A axis line. DETAILED DESCRIPTION

[0026] Here, the technical solutions in the embodiments (or "implementations") of the present application will be described clearly and completely in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0027] If there are terms involving directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance.

[0028] The present application provides a vehicle. Figures 1 to 3 The vehicle includes a frame 2, a first nut 3 and a bolt 1. The frame 2 includes a mounting hole 21 that cooperates with the bolt 1. The bolt 1 includes a head 11 and a connecting portion 12. The connecting portion 12 is connected to the head 11 along the axis A of the bolt 1. The connecting portion 12 includes a serration unit 121 arranged close to the head 11 and a threaded unit 122 arranged away from the head 11. In the direction of the axis A, the projection area of ​​the head 11 is larger than the projection area of ​​the connecting portion 12. The bolt 1 is penetrated by the mounting hole 21 and the first nut 3 cooperates with the threaded unit 122. The head 11 abuts against one side surface of the frame 2, and the first nut 3 cooperates with the bolt 1 and abuts against the surface of the other side of the frame 2, thereby realizing the connection and fixation of the bolt 1 and the frame 2.

[0029] As a metal part, the bolt 1 can play a role in conducting electricity. In the existing scheme, before connecting the bolt 1 and the frame 2, the assembler needs to grind off the insulating layer on the surface of the frame 2 and the surface of the mounting hole 21, so that the bolt 1 and the frame 2 can be connected. In order to ensure good contact between the bolt 1 and the frame 2, the grinding range of the insulating layer on the surface of the frame 2 needs to be larger than the head 11 of the bolt 1. However, the large exposed surface of the frame 2 is prone to rust.

[0030] Therefore, the sawtooth unit 121 of the present application includes a plurality of sawtooth structures 121a extending in the direction of the axis A. The plurality of sawtooth structures 121a are distributed around the axis A. The cross-sectional area of ​​the sawtooth unit 121 gradually decreases in the direction from the head 11 to the connecting portion 12. When the bolt 1 is connected to the frame 2, the sawtooth unit 121 abuts against the wall of the mounting hole 21.

[0031] The serrated unit 121 can form electrical conduction with the frame 2 when the bolt 1 is installed on the frame 2. For example, the assembler can first grind off the insulating layer on the surface of the mounting hole 21 with other tools, and then assemble the bolt 1. At this time, the serrated unit 121 and the surface of the mounting hole 21 abut to form conductive contact. Alternatively, the assembler can directly rub the serrated unit 121 against the wall of the mounting hole 21, and then match the first nut 3 with the bolt 1 to form conductive contact.

[0032] It can be seen that the provision of the serration unit 121 can more conveniently destroy the insulating layer on the wall of the mounting hole 21 during assembly, without the need for additional process bolts. After the insulating layer is destroyed, the mounting hole 21 contacts the multiple serration structures 121a to form good electrical conduction. Good electrical conduction can avoid excessive static current caused by poor grounding. Excessive static current means that the vehicle's battery is continuously discharging, affecting the battery life. It can be seen that the bolt 1 of the present application can improve the grounding effect of the vehicle and ensure the service life of the battery. In addition, compared to the technical solution of destroying the insulating layer on the surface of the frame 2 and achieving electrical conduction with the head 11, the bolt 1 of the present application requires a small insulation layer destruction area, which can better prevent wall rust. In addition, as Figure 3 As shown, the cross-sectional area of ​​the sawtooth unit 121 gradually decreases and is set to be tapered, which can play a role in guiding assembly.

[0033] In some embodiments, at least part of the sawtooth unit 121 is interference fit with the mounting hole 21. Since the sawtooth unit 121 is tapered, in this embodiment, only the sawtooth unit 121 near the head 11 may be interference fit with the mounting hole 21, or the entire sawtooth unit 121 may be interference fit with the mounting hole 21. When assembling the bolt 1, the head 11 needs to be against the frame 2, so the assembler needs to press the bolt 1 into the mounting hole 21, at which time the interference portion between the sawtooth unit 121 and the mounting hole 21 will destroy the insulating layer in the mounting hole 21, forming electrical conduction.

[0034] It can be seen that when assembling the bolt 1 of this embodiment, the assembler does not need to grind off the insulating layer in the mounting hole 21 in advance. Instead, the insulating layer is destroyed automatically during the assembly process to form electrical conduction, which reduces the difficulty of assembly and avoids the waste of grinding materials and insulating layer materials. The portion destroyed by the serration unit 121 is almost never exposed to the air, further avoiding the possibility of rust. In addition, the conical serration unit 121 in this embodiment can guide the interference assembly of the bolt 1, reducing the difficulty of assembly.

[0035] In an optional embodiment, the interference between the sawtooth unit 121 and the mounting hole 21 is greater than or equal to 0.5 mm and less than or equal to 1.5 mm. The interference can be, for example, 0.5 mm, 0.7 mm, 0.9 mm, 1.1 mm, 1.3 mm, 1.5 mm or any value in between. If the interference is too small, the portion that damages the insulating layer and conducts with the frame 2 is small. If the interference is too large, it will be difficult to place the head 11 against the frame 2, increasing the difficulty of assembly. Therefore, this interference range can well balance the conduction effect and the difficulty of assembly.

[0036] It should be understood that the present application does not limit the projection size of the sawtooth unit 121 on the axis A, nor does it limit the size of the threaded unit 122. Those skilled in the art can adjust the projection size of the sawtooth unit 121 on the axis A, the length size along the axis A, and the thread size of the threaded unit 122, and the length size along the axis A according to the size of the mounting hole 21 and the thickness of the frame 2. It can be seen that the bolt 1 of the present application is applicable to frames 2 of different vehicles, frames 2 of different sizes of the same vehicle, and mounting holes 21 at different positions on the same frame 2, and has a wide range of applications.

[0037] like Figure 4 and Figure 5 As shown, the sawtooth unit 121 includes a column structure 121b. The sawtooth structure 121a is arranged on the surface of the column structure 121b around the axis A. The projection of the sawtooth structure 121a in the direction of the axis A gradually increases in size in the direction from the sawtooth structure 121a to the column structure 121b. For example, it can be Figure 4 The triangle projection shown can also be Figure 5 The trapezoidal projection shown. The sharp corners of the triangular sawtooth structure 121a have a better effect on damaging the insulating layer. After the trapezoidal sawtooth structure 121a damages the insulating layer, the contact area with the frame 2 is increased, which can improve the electrical conduction effect. It can be seen that the pointed design of the sawtooth structure 121a can more effectively damage the insulating layer and embed into the frame 2 during assembly. The gradually increasing size of the root can improve the structural stability of the sawtooth structure 121a, thereby preventing the sawtooth structure 121a from being damaged or broken when the bolt 1 damages the frame 2.

[0038] In some embodiments, when the bolt 1 and the mounting hole 21 are in interference fit, the column structure 121b is separated from the wall of the mounting hole 21. In this way, only the serration structure 121a is in interference fit between the bolt 1 and the frame 2. This arrangement allows the material of the frame 2 to deform toward the bolt 1 when the bolt 1 destroys the insulating layer and the wall of the mounting hole 21, and can also avoid the problem that the frame 2 squeezes the column structure 121b to cause deformation of the bolt 1, making it difficult to separate the bolt 1 from the mounting hole 21 when replacing the bolt 1 or repairing the frame 2 later. At the same time, this method can also avoid stress concentration caused by long-term extrusion and deformation contact between the column structure 121b and the frame 2, thereby increasing the service life of the frame 2 and the bolt 1.

[0039] refer to Figure 2In some embodiments, the length of the serration unit 121 along the axis A is less than the length of the mounting hole 21. Since the head 11 needs to abut against the frame 2, when the length of the serration unit 121 is less than the length of the mounting hole 21, part of the threaded unit 122 will also be located in the mounting hole 21. In this way, when the first nut 3 cooperates with the threaded unit 122, sufficient locking can be formed to tightly abut against the surface of the frame 2, thereby improving the connection stability between the bolt 1 and the frame 2. This arrangement can avoid damage to the thread of the threaded unit 122 caused by the forced locking of the first nut 3 in order to abut against the surface of the frame 2. In the embodiment where the serration unit 121 and the mounting hole 21 are interference fit, this method can also further guide the serration unit 121 to "pierce" the wall of the mounting hole 21, destroying the insulating layer to form a conductive contact.

[0040] In order to facilitate processing, in some embodiments, the connecting portion 12 further includes a transition unit 123. The transition unit 123 is connected between the sawtooth unit 121 and the head 11. In the direction of the axis A, the projection area of ​​the sawtooth unit 121 is larger than the projection area of ​​the transition unit 123. In the process of cutting the sawtooth structure 121a, the transition unit 123 allows the cutter head to move, so that the cutting of the sawtooth structure 121a is more complete, avoiding cutting the head 11.

[0041] Of course, a transition structure can also be provided between the sawtooth unit 121 and the threaded unit 122. However, in some embodiments, the threaded unit 122 is directly connected to the sawtooth unit 121. The direct connection between the threaded unit 122 and the sawtooth unit 121 can ensure the locking stroke of the first nut 3, and prevent the first nut 3 from still failing to abut against the surface of the frame 2 when the first nut 3 reaches the maximum locking stroke. In the embodiment where the length of the sawtooth unit 121 is less than the length of the mounting hole 21, this arrangement can further ensure the locking stroke of the first nut 3.

[0042] The bolt 1 is used to achieve electrical conduction, so it needs to be connected to the vehicle's wiring harness. The wiring harness of the present application may include a conductive terminal 4 arranged at the end of the wiring harness. The conductive terminal 4 includes a conductive plate and an assembly hole arranged on the conductive plate; the assembly hole is sleeved on the threaded unit 122 and abuts against the end of the first nut 3 away from the frame 2. Compared with the embodiment in which the wire core of the wiring harness is connected to the bolt 1, the arrangement of the conductive terminal 4 can be more convenient for assembly and disassembly with the bolt 1.

[0043] The conductive terminal 4 can be merely sleeved on the bolt 1. In order to fix the position of the conductive terminal 4 in the direction of the axis A, the vehicle can further include a second nut 5. The second nut 5 also cooperates with the threaded unit 122 and is disposed on a side of the first nut 3 away from the head 11. In this way, the conductive terminal 4 can be confined between the first nut 3 and the second nut 5, and is difficult to be separated from the bolt 1.

[0044] The second nut 5 can also press the conductive terminal 4 onto the first nut 3. The second nut 5 and the first nut 3 are both metal parts, and are in conductive contact with the metal conductive terminal 4. The first nut 3 and the second nut 5 are in conductive contact with the threaded unit 122, so that the conductive terminal 4 and the bolt 1 can be conductively connected, and thus conductively connected with the vehicle frame 2. This setting method can avoid virtual connection of the wiring harness and improve the electrical conduction effect.

[0045] like Figure 2 As shown, the conductive terminal 4 of the present application may also include a flange connected to the conductive plate. The flange abuts against the side surface of the first nut 3. The setting of the flange can prevent the conductive terminal 4 from rotating after being installed in place. In addition, the flange and the first nut 3 are in surface-to-surface contact, which is conducive to further ensuring the conductive contact between the conductive terminal 4 and the first nut 3 and improving the electrical conduction effect.

[0046] The first nut 3 is usually configured as a hexagon, so that the first nut 3 can contact six conductive terminals 4 with flanges, and each conductive terminal 4 is directly connected to the first nut 3. This configuration is applicable to a scenario where multiple conductive terminals 4 share the bolt 1 for grounding. In addition, the conductive terminals 4 can be staggered at a fixed angle to avoid problems such as virtual connection and poor grounding.

[0047] A gasket may be provided between the head 11 and the frame 2, and between the first nut 3 and the frame 2, so as to improve the contact between the bolt 1 and the frame 2, and between the first nut 3 and the frame 2. At the same time, when the bolt 1 and the first nut 3 are tightly connected to the vehicle, the degree of damage and compression on the surface of the frame 2 are reduced. Similarly, a gasket may be provided between the second nut 5 and the conductive terminal 4. The gasket may be a flat gasket or an elastic gasket. The present application does not limit this.

[0048] In addition, the head 11 can be Figure 2 The head 11 is shown as a hexagonal prism, which is convenient for assembly using, for example, a flat wrench. The head 11 can also be set to a cylindrical shape, and a hexagonal prism hole is provided inside, which is convenient for assembly using an inner hexagonal wrench. This application is not limited to this.

[0049] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without causing conflicts. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A bolt, characterized in that: include: head; and a connecting portion connected to the head along the axis of the bolt, comprising a sawtooth unit arranged close to the head and a threaded unit arranged away from the head; in the direction of the axis, the projected area of ​​the head is larger than the projected area of ​​the connecting portion; the sawtooth unit comprises a plurality of sawtooth structures extending in the direction of the axis; the plurality of sawtooth structures are distributed around the axis; Wherein, the cross-sectional area of ​​the sawtooth unit gradually decreases in a direction from the head portion to the connecting portion.

2. The bolt according to claim 1, characterized in that The sawtooth unit comprises a columnar structure; the sawtooth structure is arranged on the surface of the columnar structure around the axis; in the direction in which the sawtooth structure points to the columnar structure, the projection size of the sawtooth structure in the direction of the axis gradually increases.

3. The bolt according to claim 1, characterized in that: The connecting portion further comprises a transition unit; the transition unit is connected between the sawtooth unit and the head; in the direction of the axis, the projection area of ​​the sawtooth unit is larger than the projection area of ​​the transition unit.

4. The bolt according to any one of claims 1 to 3, characterized in that: The thread unit is directly connected to the sawtooth unit.

5. A vehicle, characterized in that: It includes a frame, a first nut and a bolt as described in any one of claims 1 to 4; the frame includes a mounting hole that cooperates with the bolt; the bolt passes through the mounting hole, and the serrated unit abuts against the wall of the mounting hole; the head abuts against a surface of one side of the frame, and the first nut cooperates with the threaded unit and abuts against a surface on the other side of the frame.

6. The vehicle according to claim 5, characterized in that The length of the sawtooth unit along the direction of the axis is smaller than the length of the mounting hole.

7. The vehicle according to claim 5, characterized in that At least a portion of the sawtooth unit is interference fit with the mounting hole.

8. The vehicle according to claim 7, characterized in that The interference between the sawtooth unit and the mounting hole is greater than or equal to 0.5 mm and less than or equal to 1.5 mm.

9. The vehicle according to claim 7, characterized in that The sawtooth unit comprises a column structure; the sawtooth structure is arranged on the surface of the column structure around the axis; the column structure is separated from the wall surface of the mounting hole.

10. The vehicle according to any one of claims 6 to 9, characterized in that: The vehicle also includes a wiring harness and a conductive terminal arranged at the end of the wiring harness; the conductive terminal includes a conductive plate and an assembly hole arranged on the conductive plate; the assembly hole is sleeved on the threaded unit and abuts against an end of the first nut away from the frame; wherein the conductive terminal also includes a flange connected to the conductive plate; the flange abuts against the side surface of the first nut.

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