Vehicle

Abstract

The utility model provides a vehicle. The vehicle comprises a vehicle body, a connecting wire harness, a nut and a bolt. The vehicle body is provided with vehicle body metal plates. The connecting wire harness is provided with a wiring terminal; the nut and the wiring terminal are arranged on the two opposite sides of the automobile body metal plate respectively, the nut comprises a main body part and a welding rib arranged at the end of the main body part, and the welding rib extends in the circumferential direction of the nut to be in a closed shape and is welded to the automobile body metal plate; the bolt sequentially penetrates through the wiring terminal and the automobile body metal plate and is in threaded connection with the nut so that the wiring terminal and the automobile body metal plate can be connected together. The safety performance of the vehicle is high.

Description

Technical Field

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

[0002] In the engine compartment of a vehicle, a battery and electrical appliances electrically connected to the battery are installed. The battery supplies power to the electrical appliances, and the negative poles of the battery and the electrical appliances generally need to be connected to the body metal to achieve grounding.

[0003] In related technologies, the connection method between the negative terminal of a battery or an electrical appliance and the body sheet metal is the same: a nut is welded to the side of the body sheet metal facing away from the terminal. A bolt is then passed through the terminal and the body sheet metal, threaded together with the nut, thereby connecting the terminal and the body sheet metal. The nut is usually square in structure, with protruding weld points at the four corners of the nut for welding to the body sheet metal.

[0004] However, in the above-mentioned method of fixing the terminal, a certain gap will exist between the nut and the body sheet metal, which will cause crevice corrosion and may cause accidents such as fire at the terminal, thereby reducing the overall safety performance of the vehicle. Utility Model Content

[0005] The embodiment of the present application provides a vehicle that can, to a certain extent, avoid the formation of gaps between nuts and body sheet metal, thereby preventing gap corrosion, so that the vehicle provided by the embodiment of the present application has higher safety.

[0006] The present application provides a vehicle, including a body, a connecting wire harness, a nut and a bolt; the body has a body sheet metal; the connecting wire harness has a wiring terminal; the nut and the wiring terminal are arranged on opposite sides of the body sheet metal, the nut includes a main body and a welding rib arranged at the end of the main body, the welding rib extends along the circumference of the nut in a closed shape, and is welded to the body sheet metal; the bolt passes through the wiring terminal and the body sheet metal in sequence, and is screwed to the nut to connect the wiring terminal to the body sheet metal.

[0007] As an optional embodiment, the welding rib is an annular welding rib; the inner diameter of the annular welding rib gradually decreases in the direction from the body sheet metal to the main body, and the outer diameter of the annular welding rib gradually increases in the direction from the body sheet metal to the main body.

[0008] As an optional implementation, the longitudinal cross-section of the welding rib is an isosceles trapezoid.

[0009] As an optional embodiment, the welding rib has a first end face and a second end face spaced apart along its own axial direction, the first end face is connected to the vehicle body sheet metal, and the second end face is connected to the main body; at any position between the first end face and the second end face, compared with the position of the first end face, the reduction value of the inner diameter of the welding rib is equal to the increase value of the outer diameter of the welding rib at that position.

[0010] As an optional embodiment, the welding rib has a first end face and a second end face spaced apart along its own axial direction, the first end face is connected to the body sheet metal, and the second end face is connected to the main body; wherein the first end face and the second end face are both planes.

[0011] As an optional embodiment, the difference between the inner radius of the second end surface and the outer radius of the second end surface is d, and d satisfies the following formula: in, is the corrosion design coefficient, and Y is the corrosion design life.

[0012] As an optional implementation, is 1 or 0.2; Y is 5 or 10 or 12.

[0013] As an optional embodiment, the main body has an installation surface facing the vehicle body sheet metal, and the positive projection area of the welding rib on the installation surface is the first area; the distance between the inner periphery of the first area and the inner side wall of the main body is greater than the distance between the outer periphery of the first area and the outer side wall of the main body.

[0014] As an optional embodiment, in the axial direction of the bolt, the size of the main body is larger than the size of the welding rib.

[0015] As an optional embodiment, the bolt includes a bolt rod and a bolt head connected together, and the bolt rod passes through the terminal and the body sheet metal in sequence; a spring washer and a flat washer are also sleeved on the bolt rod, and the spring washer and the flat washer are stacked between the bolt head and the terminal, and the spring washer is against the bolt head, and the flat washer is against the terminal.

[0016] In the vehicle provided in the present application, the nut includes a main body and a welding rib arranged at the end of the main body. The welding rib extends along the circumference of the nut in a closed shape and is welded to the body sheet metal; the bolt passes through the wiring terminal and the body sheet metal in turn and is screwed to the nut to connect the wiring terminal and the body sheet metal together.

[0017] In this way, by forming a closed welding rib extending along the circumference of the nut at the end of the main body, no gap will exist between the welding rib and the body sheet metal during the welding process. Therefore, the occurrence of gap corrosion can be avoided to a certain extent, and the occurrence of fire accidents at the terminal can be avoided to a certain extent. Therefore, the safety performance of the vehicle provided by this embodiment can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a partial structure of a vehicle provided in an embodiment of the present application;

[0019] Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure from another perspective;

[0020] Figure 3 for Figure 1 Cross-section along AA direction;

[0021] Figure 4 A schematic diagram of the three-dimensional structure of a nut in a vehicle provided in an embodiment of the present application;

[0022] Figure 5 A schematic diagram of the planar structure of a nut in a vehicle provided in an embodiment of the present application;

[0023] Figure 6 for Figure 5 Cross-sectional view along direction BB.

[0024] Description of reference numerals:

[0025] 1. Connecting wire harness; 2. Nut; 3. Bolt; 4. Body sheet metal; 5. Spring washer; 6. Flat washer;

[0026] 11. Terminal block; 21. Main body; 22. Welding rib; 31. Bolt shank; 32. Bolt head; 41. Second connection hole;

[0027] 111, first connecting hole; 211, third connecting hole; 212, mounting surface; 213, third end surface; 221, first end surface; 222, second end surface. DETAILED DESCRIPTION

[0028] The following will clearly and thoroughly describe the technical solutions in this application in conjunction with the accompanying drawings. In the description of the embodiments of this application, unless otherwise specified, " / " means or, for example, A / B can mean A or B: "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more than two.

[0029] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to imply or suggest relative importance or implicitly indicate the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0030] In the engine compartment of a vehicle, a battery and electrical appliances electrically connected to the battery are installed. The battery supplies power to the electrical appliances, and the negative poles of the battery and the electrical appliances generally need to be connected to the body metal to achieve grounding.

[0031] In related technologies, the connection method between the negative terminal of a battery or an electrical appliance and the body sheet metal is the same: a nut is welded to the side of the body sheet metal facing away from the terminal. A bolt is then passed through the terminal and the body sheet metal, threaded together with the nut, thereby connecting the terminal and the body sheet metal. The nut is usually square in structure, with protruding weld points at the four corners of the nut for welding to the body sheet metal.

[0032] However, in the above-mentioned method of fixing the terminal, a certain gap will exist between the nut and the body sheet metal, which will cause crevice corrosion and may cause accidents such as fire at the terminal, thereby reducing the overall safety performance of the vehicle.

[0033] Therefore, the embodiment of the present application provides a vehicle that can, to a certain extent, avoid the formation of gaps between the nuts and the body sheet metal, thereby preventing crevice corrosion. This can, to a certain extent, avoid accidents such as fires at the wiring terminals, thereby improving the safety performance of the vehicle provided by this embodiment.

[0034] The embodiments of the present application will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0035] Please combine Figures 1 to 3 , Figure 1 A schematic diagram of a partial structure of a vehicle provided in an embodiment of the present application is shown. Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure from another perspective, Figure 3 for Figure 1 As shown in the cross-sectional view taken along the AA direction, this embodiment provides a vehicle including a vehicle body, a connecting wire harness 1, a nut 2, and a bolt 3. The vehicle body has a body sheet metal 4; the connecting wire harness 1 has a terminal 11; and the nut 2 and the terminal 11 are disposed on opposite sides of the body sheet metal 4.

[0036] Please combine Figure 4 , Figure 4This is a schematic diagram of the three-dimensional structure of a nut in a vehicle according to an embodiment of the present application. As shown, to prevent the formation of a gap between the nut 2 and the vehicle body sheet metal 4, which could lead to crevice corrosion, the nut 2 in this embodiment includes a main body 21 and a weld rib 22 disposed at the end of the main body 21. The weld rib 22 extends circumferentially around the nut 2 and is welded to the vehicle body sheet metal 4. A bolt 3 passes through the terminal 11 and the vehicle body sheet metal 4, threadedly engaging the nut 2 to connect the terminal 11 to the vehicle body sheet metal 4. By forming the weld rib 22 at the end of the main body 21, which extends circumferentially around the nut 2 and forms a closed shape, the nut 2 is welded to the vehicle body sheet metal 4 without a gap. This prevents crevice corrosion and, in turn, prevents fires at the terminal 11. This improves the safety of the vehicle according to this embodiment.

[0037] It should be noted that, in some embodiments, the welding ribs 22 can be directly welded to the main body 21; in other embodiments, the welding ribs 22 can also be formed by stamping at the end of the main body 21. Here, there is no specific limitation on the formation method of the welding ribs 22.

[0038] The crevice corrosion mentioned above can be understood as a localized corrosion phenomenon that occurs in a small gap or crevice between two material surfaces. Here, the crevice corrosion phenomenon will not be introduced in detail.

[0039] like Figure 3 As shown, since the welding rib 22 and the body sheet metal 4 are welded together, it is inevitable that part of the body sheet metal 4 and the welding rib 22 will be melted during the welding process. Figure 3 The welding ribs 22 are shown extending into the interior of the vehicle body sheet metal 4.

[0040] It can be understood that the bolt 3 should include a bolt rod 31 and a bolt head 32 connected together, and the bolt rod 31 passes through the terminal 11 and the body sheet metal 4 in sequence and is screwed together with the main body 21. Specifically, the terminal 11 has a first connecting hole 111 for the bolt rod 31 to pass through, the body sheet metal 4 has a second connecting hole 41 for the bolt rod 31 to pass through, and the main body 21 has a third connecting hole 211 for the bolt rod 31 to pass through. After the bolt rod 31 passes through the first connecting hole 111, the second connecting hole 41 and the third connecting hole 211 in sequence, the terminal 11 is connected to the body sheet metal 4 together to achieve grounding of the connection harness 1.

[0041] It should be noted that the above-mentioned connecting wire harness 1 can be the negative electrode connection of a battery or the negative electrode connection of an electrical appliance. Here, the specific type of the connecting wire harness 1 is not limited.

[0042] To facilitate the processing and manufacturing of the nut 2 to form the weld rib 22, in this embodiment, the weld rib 22 is an annular weld rib 22. The inner diameter of the annular weld rib 22 gradually decreases from the body sheet metal 4 to the main body 21, while the outer diameter of the annular weld rib 22 gradually increases from the body sheet metal 4 to the main body 21. This ensures sufficient connection strength between the weld rib 22 and the body sheet metal 4, while also allowing for a larger connection between the weld rib 22 and the main body 21, thereby enhancing the structural strength of the connection.

[0043] Please combine Figure 5 and Figure 6 , Figure 5 This is a schematic diagram of the planar structure of a nut in a vehicle provided in an embodiment of the present application. Figure 6 for Figure 5 Cross-sectional view along direction BB. As shown in the figure, to enhance the structural symmetry of the weld rib 22, the longitudinal cross-section of the weld rib 22 can be configured as an isosceles trapezoid. This enhances the overall structural symmetry of the weld rib 22, thereby increasing the structural strength of the weld rib 22 and, consequently, the overall strength of the nut 2.

[0044] In a specific implementation of this embodiment, the welding rib 22 has a first end face 221 and a second end face 222 spaced apart along its own axial direction. The first end face 221 is connected to the body sheet metal 4, and the second end face 222 is connected to the main body. Figure 6 In the figure, the second end face 222 is represented by a dotted line. The second end face 222 here can be understood as a virtual plane, that is, the position where the welding rib 22 is connected to the main body 21. Since the main body 21 and the welding rib 22 are connected together, the plane is actually invisible, so it is represented by a dotted line here.

[0045] Of course, the main body 21 also has two end surfaces spaced apart along its own axial direction. Specifically, the main body 21 has a mounting surface 212 and a third end surface 213 , wherein the mounting surface 212 is connected to the second end surface 222 , and the second end surface 222 is flush with the mounting surface 212 .

[0046] It can be understood that when the longitudinal cross-sectional shape of the welding rib 22 is an isosceles trapezoid, then at any position between the first end face 221 and the second end face 222, compared with the position of the first end face 221, the reduction value of the inner diameter of the welding rib 22 is equal to the increase value of the outer diameter of the welding rib 22 at that position. That is to say, when the welding rib 22 is transversely sectioned at any position between the first end face 221 and the second end face 222, the cross-sectional figure is also annular, but the inner diameter of the cross-sectional figure is smaller than the inner diameter of the first end face 221, and the outer diameter of the cross-sectional figure is larger than the outer diameter of the first end face 221, and for the welding rib 22, the change value of its inner diameter is equal to the change value of its outer diameter.

[0047] Furthermore, to improve the reliability and convenience of the connection between the first end surface 221 and the body sheet metal 4, and between the second end surface 222 and the main body 21, in a specific embodiment of this embodiment, both the first end surface 221 and the second end surface 222 are planar. This not only improves the reliability of the connection between the weld rib 22 and the body sheet metal 4, and the reliability of the connection between the weld rib 22 and the main body 21, but also, when the first end surface 221 is planar, it can largely prevent the formation of a gap between the first end surface 221 and the body sheet metal 4, thereby further preventing the occurrence of crevice corrosion during the welding of the weld rib 22 to the body sheet metal 4.

[0048] It should be noted that the difference between the inner diameter and the outer diameter of the second end surface 222 will also affect the degree of crevice corrosion. Therefore, in this embodiment, the difference between the inner diameter and the outer diameter of the second end surface 222 is limited.

[0049] Specifically, the difference between the inner radius of the second end surface 222 and the outer radius of the second end surface 222 is d, and d satisfies the following formula: in, is the corrosion design coefficient, and Y is the corrosion design life. The value of is specifically related to the position of the connection harness 1.

[0050] Based on the area inside the chassis cabin and the area inside the cab, when the connection harness 1 is in the area inside the chassis cabin, When the connection harness 1 is in the cab,

[0051] Generally, the value of Y can be 5, 10 or 12.

[0052] For example, for the area inside the chassis cabin, when the corrosion period is 5 years, d = 1.5 + 1 × 0.001 (79.44 × 5 - 1.938 × 5 2)=1.84875, that is, the difference between the inner radius of the second end surface 222 and the outer radius of the second end surface 222 is 1.84875 mm. Other values of d are not listed here.

[0053] Furthermore, to ensure the overall structural strength of the nut 2 and reduce processing costs, in some optional embodiments, the main body 21 is larger than the weld rib 22 in the axial direction of the bolt 3. In this embodiment, the weld rib 22 can be 1 mm in the axial direction of the bolt 3. Of course, some errors introduced during the molding process are within the scope of this embodiment; for example, the weld rib 22 can be 0.9 mm or 1.1 mm. The size of the weld rib 22 in the axial direction of the bolt 3 is not specifically limited.

[0054] To prevent the weld rib 22 from interfering with the insertion of the bolt shank 31, in some optional embodiments, the orthographic projection of the weld rib 22 on the mounting surface 212 forms a first region; the distance between the inner periphery of the first region and the inner sidewall of the main body 21 is greater than the distance between the outer periphery of the first region and the outer sidewall of the main body 21. In other words, the weld rib 22 is connected to the outer edge of the mounting surface 212. This ensures welding to the vehicle body sheet metal 4 while also preventing the weld rib 22 from interfering with the insertion of the bolt shank 31. This ensures a proper connection between the terminal block 11 and the vehicle body sheet metal 4.

[0055] In addition, during the use of the vehicle, the bolt 3 may become loose, which may affect the connection reliability between the terminal 11 and the body sheet metal 4. Therefore, in order to prevent the bolt 3 from loosening to a certain extent, a spring washer 5 and a flat washer 6 are also provided on the bolt rod 31. The spring washer 5 and the flat washer 6 are stacked between the bolt head 32 and the terminal 11, and the spring washer 5 is against the bolt head 32, and the flat washer 6 is against the terminal 11.

[0056] Among them, the spring washer is also called a wave washer or a disc spring, which is mainly used to prevent the bolt or nut from loosening in a vibrating environment. The spring washer provides pre-tightening force through its elastic deformation, thereby enhancing the reliability of the fastener (the bolt 3 in this embodiment); and the flat washer is a common mechanical component, mainly used to provide a flat supporting surface between the bolt or nut and the fastener (the terminal 11 in this embodiment). The main function of the flat washer is to disperse pressure, protect the surface of the fastener, reduce friction and prevent loosening.

[0057] In this way, by providing the spring washer 5 and the flat washer 6 , the bolt 3 can be prevented from being loosened to a certain extent, thereby improving the connection reliability between the terminal 11 and the vehicle body sheet metal 4 .

[0058] The above content is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A vehicle, characterized in that: include: A vehicle body, comprising body sheet metal; A connecting wire harness having a wiring terminal; a nut, disposed on opposite sides of the body sheet metal from the terminal block, the nut comprising a main body and a welding rib disposed at an end of the main body, the welding rib extending in a closed shape along the circumference of the nut and being welded to the body sheet metal; and A bolt passes through the connection terminal and the body sheet metal in sequence and is threadedly connected with the nut to connect the connection terminal and the body sheet metal together.

2. The vehicle according to claim 1, characterized in that The welding rib is an annular welding rib; An inner diameter of the annular welding rib gradually decreases in a direction from the vehicle body sheet metal to the main body portion, and an outer diameter of the annular welding rib gradually increases in a direction from the vehicle body sheet metal to the main body portion.

3. The vehicle according to claim 2, characterized in that The longitudinal section of the welding rib is an isosceles trapezoid.

4. The vehicle according to claim 2, characterized in that The welding rib has a first end surface and a second end surface spaced apart along its axial direction, the first end surface is connected to the vehicle body sheet metal, and the second end surface is connected to the main body; At any position between the first end surface and the second end surface, compared with the position at which the first end surface is located, the reduction value of the inner diameter of the welding rib is equal to the increase value of the outer diameter of the welding rib at that position.

5. The vehicle according to claim 2, characterized in that The welding rib has a first end surface and a second end surface spaced apart along its axial direction, the first end surface is connected to the vehicle body sheet metal, and the second end surface is connected to the main body; Wherein, the first end surface and the second end surface are both planes.

6. The vehicle according to claim 5, characterized in that The difference between the inner radius of the second end surface and the outer radius of the second end surface is d, and d satisfies the following formula: Among them, the is the corrosion design coefficient, and Y is the corrosion design life.

7. The vehicle according to claim 6, characterized in that described is 1 or 0.2; The Y is 5, 10 or 12.

8. The vehicle according to any one of claims 2 to 7, characterized in that The main body has a mounting surface facing the vehicle body sheet metal, and the orthographic projection area of the welding rib on the mounting surface is a first area; A distance between an inner periphery of the first region and an inner sidewall of the main body is greater than a distance between an outer periphery of the first region and an outer sidewall of the main body.

9. The vehicle according to any one of claims 1 to 7, characterized in that In the axial direction of the bolt, the size of the main body is larger than the size of the welding rib.

10. The vehicle according to any one of claims 1 to 7, characterized in that The bolt includes a bolt shank and a bolt head connected together, and the bolt shank passes through the terminal and the body sheet metal in sequence; A spring washer and a flat washer are also sleeved on the bolt rod. The spring washer and the flat washer are stacked between the bolt head and the wiring terminal. The spring washer abuts against the bolt head, and the flat washer abuts against the wiring terminal.

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