Terminal and wiring structure for electrical control box

Abstract

The present invention discloses a terminal and a wiring structure for an electrical control box. The present invention provides a terminal for a vehicle central electrical box, the terminal comprising a bolt, at least a part of the bolt having an external thread, the bolt being made of carbon steel. Wherein, the terminal further comprises a sleeve having a central channel, and the sleeve is sleeved on the bolt by means of the bolt passing through the central channel, and the sleeve is made of a metal material with higher conductivity than carbon steel. The terminal according to the present invention meets the requirements of the terminal for high mechanical strength and high electrical conductivity by means of low-cost means.

Description

Technical Field

[0001] The present invention relates to the field of electrical connections, and more particularly, to an electrical control box used in a vehicle. Background Art

[0002] In the design process of the vehicle electrical / electronic distribution system, the central electrical control box is a technology that combines electronics and electricity in modern automobiles. As the distribution center of battery energy in vehicle electrical systems, it realizes the reasonable distribution of the current in each circuit; as the information processing center in vehicle electronics, it receives the status signals of each electronic device and issues control signals to make corresponding responses.

[0003] Figure 5 Fig. 1 shows a part 1 of an existing central electrical box used in a vehicle, which has a terminal 2. With the development of the automotive industry, especially with the development of electric vehicles, the demand for the current of the vehicle electronic system in the vehicle electrical distribution system is increasing. However, in order to meet the mechanical installation requirements of high torque, the existing terminal 2 in the existing central electrical box is generally made of carbon steel. For the development of high-current central control boxes, such terminals cannot meet the high-current transmission requirements. Therefore, the terminal 2 of the central electrical box still needs to be improved in order to meet the dual requirements of high mechanical strength and high electrical conductivity. Summary of the Invention

[0004] In order to conform to the development of new energy vehicles and overcome the deficiencies of the terminals in the central electrical box in the above-mentioned prior art, the present invention provides a terminal for a vehicle central electrical box. The terminal includes a bolt, at least a part of the bolt has an external thread, and the bolt is made of carbon steel. Wherein, the terminal further includes a sleeve having a central channel, and the sleeve is sleeved on the bolt by means of the bolt passing through the central channel. The sleeve is made of a metal material with higher electrical conductivity than carbon steel.

[0005] According to one aspect of the present invention, the sleeve is made of copper or a copper alloy.

[0006] According to still another aspect of the present invention, at least a part of the central channel of the sleeve has an internal thread, and the internal thread engages with the external thread on the bolt.

[0007] According to still another aspect of the present invention, the bolt has a first part and a second part. The first part has a first cross-sectional diameter, and the second part has a second cross-sectional diameter. The first cross-sectional diameter is greater than the second cross-sectional diameter. Wherein, external threads are provided on both the first part and the second part of the bolt.

[0008] According to still another aspect of the present invention, the internal thread of the sleeve is threadedly connected to the second part of the bolt.

[0009] According to another aspect of the present invention, the terminal also includes a first nut and a second nut. The first nut is threadedly connected to the bolt at the first end of the sleeve, and the second nut is threadedly connected to the bolt at the second end of the sleeve opposite to the first end where the threads are located.

[0010] In addition, the present invention also provides a wiring structure for a vehicle central electrical box. The wiring structure includes a terminal as described above, a first annular terminal piece, and a second annular terminal piece. The first annular terminal piece is disposed at the first end of the sleeve, and the second annular terminal piece is disposed at the second end of the sleeve opposite to the first end. The first annular terminal piece is electrically connected to the second annular terminal piece through the sleeve.

[0011] Since the sleeve is made of copper or copper alloy, it achieves good electrical connection between the two annular terminal pieces. At the same time, the bolt made of carbon steel in the terminal can still ensure bearing large torque, thus guaranteeing the mechanical strength of the electrical connection structure.

[0012] The terminal according to the present invention meets the requirements of high mechanical strength and high electrical conductivity of the terminal by means of low cost.

[0013] In the terminal according to the present invention, the sleeve and the bolt in the terminal are connected by threads, which is not only convenient for disassembly and assembly, but also safer and more reliable during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] To more fully understand the present invention, reference may be made to the following description of exemplary embodiments in conjunction with the accompanying drawings, in which:

[0015] Figure 1 A perspective view of a terminal according to a preferred embodiment of the present invention applied in a central control box is shown.

[0016] Figure 2 Shown is Figure 1 A perspective view of the bolt of the terminal shown above.

[0017] Figure 3 Shown is Figure 1 A perspective view of the sleeve of the terminal described above.

[0018] Figure 4 Another perspective view of the terminal according to a preferred embodiment of the present invention is shown, in which nuts are provided at both ends of the sleeve.

[0019] Figure 5 A part of a conventional vehicle central electrical box in use is shown.

[0020] LIST OF REFERENCE NUMERALS

[0021] 10 Terminal

[0022] 20 Bolts

[0023] 21 First part

[0024] 22 Second part

[0025] 23 Step portion

[0026] 30 Sleeve

[0027] 31 Central channel

[0028] 32 Internal thread

[0029] 33 Concave-convex surface

[0030] 51, 52 Nuts Detailed implementation manners

[0031] The present invention will be further described below in conjunction with specific embodiments and the accompanying drawings. More details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can obviously be implemented in many other ways different from this description. Those skilled in the art can make similar generalizations and deductions according to the actual application situation without departing from the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment.

[0032] Figure 1 The terminal block 10 according to a preferred embodiment of the present invention is shown. The terminal block 10 is adapted to be used in a central wire box of a vehicle to achieve the connection of terminal pieces.

[0033] As Figure 2 and Figure 3 shown, the terminal block 10 includes a bolt 20 and a sleeve 30. In particular, according to the present invention, the bolt 20 and the sleeve 30 are made of different materials. Among them, the bolt 20 is preferably made of carbon steel capable of withstanding large torques, while the sleeve 30 is made of other metal materials with higher conductivity than carbon steel. Preferably, the sleeve 30 can be made of copper or copper alloy. By making the bolt 20 and the sleeve 30 of the terminal block 10 from different materials, the dual requirements of high mechanical strength and high conductivity for the terminal block of the electrical control box can be met, especially the mechanical and electrical requirements of the electrical control box in new energy vehicles can be satisfied.

[0034] As Figure 2 shown, according to a preferred embodiment of the present invention, the bolt 20 is composed of two parts with different diameters. Specifically, the bolt 20 includes a first part 21 and a second part 22. The first part 21 has a first cross-sectional diameter, while the second part 22 has a second cross-sectional diameter, and the first cross-sectional diameter is greater than the second cross-sectional diameter. A step portion 23 is formed between the first part 21 and the second part 22.

[0035] External threads are formed on the entire outer circumferential surface of the second part 22 of the bolt 20, while external threads are formed on only a part of the outer circumference of the first part 21 of the bolt 20. From Figure 2 it can be seen that a section of the first part 21 of the bolt 20 near its end is provided with external threads, while a section of the first part 21 of the bolt 20 near the second part 22 is not provided with threads.

[0036] Figure 3 shows a sleeve 30 according to a preferred embodiment adapted to Figure 2 the bolt 20 shown. The sleeve 30 is generally cylindrical and has a central passage 31 through which the bolt 20 can be disposed. Preferably, at least a part of the central passage 31 of the sleeve 30 is provided with internal threads 32 which can be rotationally engaged with the external threads on the bolt 20. Matching the bolt 20, the central passage 31 of the sleeve 30 is also divided into two sections, one of which has a smaller inner diameter and is provided with internal threads 32 which are adapted to be rotationally engaged with the external threads of the second part 22 of the bolt 20.

[0037] Preferably, the two end faces of the sleeve 30 are flat, so that the end faces of the sleeve 30 are in surface contact with the terminal faces at the corresponding positions.

[0038] In addition, as Figure 3 shown, at least a section at the middle position of the outer circumferential surface of the sleeve 30 is provided with a concavo-convex surface 33, for example, a concavo-convex surface 33 formed by providing a plurality of slots extending in the longitudinal axis direction of the bolt 20. Thus, the operability of the sleeve 30 can be increased.

[0039] Figure 4 Another perspective view of the terminal 10 according to a preferred embodiment of the present invention is further shown. As Figure 4 shown, two nuts 51, 52 are respectively threadedly connected to the bolt 20 at both ends of the sleeve 30. In other words, one of the two nuts 51, 52, the nut 51, has internal threads 32 corresponding to the external threads on the first part 21 of the bolt 20, while the other nut 52 of the two nuts 51, 52 has internal threads 32 corresponding to the external threads on the second part 22 of the bolt 20.

[0040] When the terminal 10 as Figure 4 shown is installed in an electrical control box in a vehicle, the terminal 10 is particularly suitable for realizing the electrical connection of two annular terminal pieces. The structure of the annular terminal piece is conventional and will not be described in detail here.

[0041] Specifically, the first annular terminal piece is arranged at the first end of the sleeve 30, and the second annular terminal piece is arranged at the second end of the sleeve 30 opposite to the first end. The first annular terminal piece is electrically connected to the second annular terminal piece through the sleeve 30. Since the sleeve 30 is made of copper or copper alloy, good electrical connection between the two annular terminal pieces is achieved. At the same time, the bolt 20 made of medium carbon steel in the terminal post 10 can still ensure bearing a large torque, thus guaranteeing the mechanical strength of the electrical connection structure.

[0042] The terminal post 10 according to the present invention meets the requirements of high mechanical strength and high electrical conductivity of the terminal post by means of low cost.

[0043] The sleeve 30 and the bolt 20 in the terminal post 10 are connected by threads, which is not only convenient for disassembly and assembly, but also safer and more reliable during use.

[0044] Although the present invention is disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent change and decoration made to the above embodiments according to the technical essence of the present invention without departing from the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A terminal for a vehicle central electrical box, the terminal comprising a bolt, at least a part of the bolt having an external thread, the bolt being made of carbon steel, It is characterized in that the terminal further comprising a sleeve having a central passage, the sleeve being sleeved on the bolt by means of the bolt passing through the central passage, at least a part of the central passage of the sleeve having an internal thread, the internal thread meshing with the external thread on the bolt, and the sleeve being made of a metal material having a higher electrical conductivity than the carbon steel.

2. The terminal according to claim 1, characterized in that, The sleeve is made of copper or a copper alloy.

3. The terminal according to claim 2, wherein, The bolt has a first part and a second part, the first part having a first cross-sectional diameter and the second part having a second cross-sectional diameter, the first cross-sectional diameter being greater than the second cross-sectional diameter, wherein both the first part and the second part are provided with external threads.

4. The terminal according to claim 3, characterized in that, The internal thread of the sleeve is connected to the external thread of the second part of the bolt.

5. The terminal according to claim 1, wherein The terminal further comprises a first nut and a second nut, the first nut being threadedly connected to the bolt at a first end of the sleeve, and the second nut being threadedly connected to the bolt at a second end of the sleeve opposite to the first end.

6. A wiring structure for a vehicle central electrical box, the wiring structure comprising a terminal according to any one of claims 1-5, a first annular terminal piece and a second annular terminal piece, the first annular terminal piece being disposed at a first end of the sleeve, the second annular terminal piece being disposed at a second end of the sleeve opposite to the first end, the first annular terminal piece being electrically connected to the second annular terminal piece through the sleeve.

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