CN218569240U

CN218569240U - Aluminum wire connecting structure

Info

Publication number: CN218569240U
Application number: CN202222457167.3U
Authority: CN
Inventors: 王超; 刘勇
Original assignee: Changchun Jetty Automotive Parts Co Ltd
Current assignee: Changchun Jetty Automotive Parts Co Ltd
Priority date: 2022-09-16
Filing date: 2022-09-16
Publication date: 2023-03-03
Anticipated expiration: 2032-09-16

Abstract

The utility model discloses an aluminum conductor connection structure, including interconnect's aluminum terminal and aluminum conductor, the aluminum terminal is including the grafting portion, first connecting portion and the second connecting portion that connect gradually and integrated into one piece, the aluminum conductor includes the insulating layer of sinle silk and cladding sinle silk, after the sinle silk strips partial insulating layer, it exposes partial front end and is connected with at least partial first connecting portion, the rear end at least part with the second connecting portion are connected. The aluminum wire connecting structure utilizes the aluminum terminal to replace the traditional copper terminal, and can effectively solve the problem that electrochemical corrosion occurs when the copper terminal is in direct contact with an aluminum wire.

Description

Aluminum wire connecting structure

Technical Field

The utility model relates to a pencil processing field, more specifically relates to an aluminum conductor connection structure.

Background

Along with the use amount of the electric connecting terminal is larger and larger, a pure copper terminal or a copper-aluminum terminal becomes a commonly-used connecting terminal, in addition, in order to realize the light weight of the cable, people adopt conductive materials with large relative storage capacity and lighter relative quality such as aluminum, aluminum alloy and the like as cable conductor materials, however, because the electrode potential difference between copper and aluminum is larger, after the copper terminal is directly connected with the conductor of the aluminum cable, under the action of air and water, electrochemical corrosion can be generated between copper and aluminum, the aluminum cable conductor is easy to corrode to cause the contact resistance increase of the copper-aluminum connecting area, in the long-term use process, power failure accidents are easy to cause, equipment can be burned down seriously, explosion or fire is caused, and the normal operation of an electric power system is influenced.

However, when a pure aluminum terminal is used, the conductive effect at the insertion position of the aluminum terminal is poor due to the dense oxide layer on the surface of aluminum, and most of the existing connection modes of the terminal and a wire are compression joint, so that the processing speed is high, and the process is mature.

Therefore, an aluminum terminal with good conductive effect and capable of solving the creep effect of the aluminum cable is urgently needed in the wire harness processing industry.

SUMMERY OF THE UTILITY MODEL

The utility model provides an aluminum conductor connection structure, aluminum terminal and aluminum conductor including interconnect, the aluminum terminal is including the grafting portion, first connecting portion and the second connecting portion that connect gradually and integrated into one piece, the aluminum conductor includes the insulating layer of sinle silk and cladding sinle silk, after the sinle silk strips partial insulating layer, it exposes partial front end and is connected with at least partial first connecting portion, the rear end at least part with the second connecting portion are connected.

Optionally, the second connection portion includes a conductor crimping portion and an insulating crimping portion, and a front end of the insulating layer is disposed inside the insulating crimping portion.

Optionally, the insertion part is cylindrical or needle-shaped, and at least part of the surface of the insertion part is provided with a plating layer.

Optionally, the material of the plating layer contains one of nickel, cadmium, manganese, zirconium, cobalt, tin, titanium, chromium, gold, silver, zinc, tin-lead alloy, silver-antimony alloy, palladium-nickel alloy, graphite silver, graphene silver, or silver-gold-zirconium alloy.

Optionally, the first connection portion is cylindrical, or U-shaped, or flat plate-shaped.

Optionally, a transition portion is further included between the insertion portion and the first connection portion, and the transition portion is bendable.

Optionally, one end of the second connecting portion, which is far away from the first connecting portion, is provided with a crimping wing, and the crimping wing wraps part of the insulating layer.

Optionally, a ratio of a length of the first connecting part to a length of the conductor crimping part is 1 to 4.

Optionally, a ratio of the length of the wire core to the length of the first connection portion is 0.5 to 1.5.

Optionally, a ratio of a diameter of the conductor crimp portion to a diameter of the wire core is 1.0 to 1.5.

According to the utility model discloses an embodiment, this paper connection structure connects aluminium terminal and aluminium wire, adopts the dual connection to can set up the connected mode of first connecting portion into the welding, not only can realize that connection structure's electric current switches on, can also guarantee the stability that wire and terminal are connected, avoid in the in-service use because aluminium wire's creep effect leads to aluminium wire to drop from aluminium terminal. Utilize the aluminium terminal to replace traditional copper terminal, can effectively solve copper terminal and aluminium line direct contact and take place electrochemical corrosion's problem, moreover, grafting portion, first connecting portion and second connecting portion integrated into one piece, processing is convenient, practices thrift man-hour. In addition, the coating is arranged at the inserting part of the aluminum terminal, so that the problem of poor conducting effect of an oxide layer on the surface of the aluminum terminal can be effectively solved, the hardness can be increased, and the inserting and pulling times of the terminal can be increased.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of an aluminum terminal of the present invention;

FIG. 2 is a top view of the aluminum terminal of FIG. 1;

fig. 3 is a schematic view of the aluminum wire connection structure of the present invention.

The figures are labeled as follows:

1. a plug-in part; 2. a first connection portion; 3. a second connecting portion; 31. a conductor crimping portion; 32. an insulating crimping part; 4. a transition portion; 5. crimping wings; 61. a wire core; 62. an insulating layer.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of parts and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The aluminum conductor connecting structure comprises an aluminum terminal and an aluminum conductor which are connected with each other, the aluminum terminal comprises a plug-in part 1, a first connecting part 2 and a second connecting part 3 which are sequentially connected and integrally formed, the aluminum conductor comprises a wire core 61 and an insulating layer 62 covering the wire core 61, after the wire core 61 strips part of the insulating layer 62, the front end of the exposed part of the wire core 61 is connected with at least part of the first connecting part 2, and the rear end of the wire core is connected with at least part of the second connecting part 3. The connection structure connects the aluminum terminal with the wire, the part wire core 61 is welded or crimped at the first connection part 2, the part wire core 61 is connected with the conductor crimping part 31, the insulating layer 62 is connected with the insulating crimping part 32, the current conduction of the connection structure can be realized, the stability of the connection between the wire and the terminal can be ensured by the arrangement of the conductor crimping part 31 and the insulating crimping part 32, and the aluminum wire is prevented from falling off from the aluminum terminal due to the creep effect of the aluminum wire in the actual use process. Utilize the aluminium terminal to replace traditional copper terminal, can effectively solve copper terminal and aluminium line direct contact and take place electrochemical corrosion's problem, moreover, grafting portion 1, first connecting

portion

2 and 3 integrated into one piece of second connecting portion, processing is convenient, practices thrift man-hour.

In some embodiments, as shown in fig. 3, the second connection part 3 includes a conductor crimp part 31 and an insulating crimp part 32, and a leading end of the insulating layer 62 is disposed inside the insulating crimp part 32. One end of the wire is stripped with a part of the insulating layer 62 and then the wire core 61 is exposed, and the front ends of the rest insulating layers 62 are arranged in the insulating crimping part 32, so that the front end of the insulating layer 62 can be completely crimped in the insulating crimping part 32 during crimping, and the phenomenon that a gap exists to enable air to enter the aluminum terminal to cause the aluminum terminal and the wire to be corroded is avoided, and the service life of the aluminum wire connecting structure is shortened.

In some embodiments, the plug part 1 is cylindrical or needle-shaped, and the surface of the plug part 1 is at least partially provided with a plating layer.

The aluminium terminal is because there is the compact oxide layer on the aluminium surface, and it is not good to lead to the electrically conductive effect of aluminium terminal grafting department to, the connected mode of present terminal and wire is mostly for the crimping, and process velocity is fast, and the technology is ripe, but aluminium material has the creep effect, can warp gradually under the stress, leads to the aluminium cable to break away from gradually from the crimping, leads to the circuit to become invalid. The plating layer is arranged on the plug part 1 of the aluminum terminal, so that the problem of poor conductive effect of an oxide layer on the surface of the aluminum terminal can be effectively solved, the hardness can be increased, and the plugging times of the terminal can be increased.

According to different use scenes, different electric devices are connected, and the insertion part 1 can be in a cylindrical shape or in a needle shape. Because the plug part 1 needs to be connected with an electric device, the corrosion resistance of the aluminum terminal can be improved by arranging the transition protective layer on the surface of the plug part 1.

In some embodiments, the material of the plating layer is one of nickel, cadmium, manganese, zirconium, cobalt, tin, titanium, chromium, gold, silver, zinc, tin-lead alloy, silver-antimony alloy, palladium-nickel alloy, graphite silver, graphene silver, or silver-gold-zirconium alloy. In order to demonstrate the influence of different coating materials on the corrosion resistance of the terminal, an inventor uses aluminum terminal samples with the same specification, material and different coating materials to be placed in a salt spray test box, sprays salt spray on all positions of the aluminum terminal samples, takes out the aluminum terminal samples every 20 hours, cleans and observes the surface corrosion condition, namely a period, and stops the test and records the period number at that time until the surface corrosion area of the aluminum terminal samples is more than 10% of the total area. In this example, the number of cycles less than 80 was considered to be unacceptable.

Table 1: influence of different coating materials on corrosion resistance of aluminum terminal

As can be seen from table 1 above, when the selected plating layer is made of gold, silver-antimony alloy, palladium-nickel alloy, graphite-silver, graphene-silver, and silver-gold-zirconium alloy, the experimental result exceeds the standard value more, and the performance is more stable. When the material of the plating layer is nickel, tin-lead alloy and zinc, the experimental result can meet the requirement, so that the inventor selects the material of the plating layer to be one of gold, silver, nickel, tin-lead alloy, zinc, silver-antimony alloy, palladium-nickel alloy, graphite silver, graphene silver and silver-gold-zirconium alloy.

In some embodiments, the first connection portion 2 is cylindrical or U-shaped or plate-shaped or bowl-shaped. The first connecting part 2 can be cylindrical or U-shaped or flat plate-shaped or bowl-shaped, the first connecting part 2 is designed into different shapes, so that the aluminum terminal can be connected with an aluminum conductor according to actual requirements, the process structure of an electrical product is optimized, the processing time is shortened, and the production and operation cost is reduced.

In some embodiments, the transition portion is bendable and is included between the socket portion 1 and the first connection portion 2. Still include transition portion between grafting portion 1 and the first connecting portion 2, in some use scenes, transition portion can buckle, and the angle of buckling is 0 ~ 90 generally, can realize being connected of the consumer of multiple different angles and wire through the transition portion that can buckle, satisfies multiple actual installation demand.

In some embodiments, an end of the second connecting portion 3 away from the first connecting portion 2 is provided with a pressing wing 5, and the pressing wing 5 wraps a part of the insulating layer 62. When the aluminum terminal is used in a wet area in a vehicle body, in order to prevent the aluminum terminal from being corroded due to water entering the inside of the aluminum terminal, a wiper plug is generally used to prevent water from entering the end of the aluminum terminal and the connected wire, and a crimping wing 5 is provided at the end of the second connecting portion 3 to fix the wiper plug.

In some embodiments, the ratio of the length of the first connection part 2 to the length of the conductor crimp part 31 is 1 to 4. The wire core 61 is partially connected to the first connecting portion 2, and a part of the wire core 61 is crimped by the conductor crimping portion 31, so that the length of the first connecting portion 2 cannot be too short, if the length is shorter than the conductor crimping portion 31, the welding between the wire core 61 and the first connecting portion 2 may not be stable enough, and the ratio of the length of the first connecting portion 2 to the length of the conductor crimping portion 31 is preferably 1 to 4 as verified by repeated experiments of the inventor.

In some embodiments, the ratio of the length of the wire core 61 to the length of the first connection portion 2 is 0.5 to 1.5. Expose the sinle silk 61 after stripping the insulating layer 62 of wire and need weld on first connecting portion 2, consequently, through the inventor's experiment repeatedly verification, the length of sinle silk 61 is favorable to being connected of sinle silk 61 and first connecting portion 2 when being 0.5 ~ 1.5 with the length of first connecting portion 2, surpasss this scope and leads to sinle silk 61 and the firm or extravagant wire material of first connecting portion 2 connecting portion easily.

In some embodiments, the ratio of the diameter of the conductor crimp 31 to the diameter of the wire core 61 is 1.0 to 1.5. When the aluminum terminal is connected to a wire, the front end core 61 is partially welded to the first connecting portion 2, the rear end core 61 is partially inserted into the conductor crimping portion 31, and the core 61 is crimped to the conductor crimping portion 31 to ensure airtightness inside the wire, and if the diameter of the conductor crimping portion 31 is too large, a gap may be formed between the core 61 and the conductor crimping portion 31 when the core 61 is crimped, which may affect airtightness of the connection structure.

Although some specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. The aluminum terminal comprises a plug-in part, a first connecting part and a second connecting part which are sequentially connected and integrally formed, the aluminum conductor comprises a wire core and an insulating layer for coating the wire core, after the wire core is stripped, the exposed front end of the wire core is connected with at least part of the first connecting part, and at least part of the rear end of the wire core is connected with the second connecting part.

2. The aluminum wire connection structure according to claim 1, wherein the second connection portion includes a conductor crimp portion and an insulating crimp portion, a leading end of the insulating layer being disposed inside the insulating crimp portion.

3. The aluminum conductor connecting structure as claimed in claim 1, wherein the plug part is cylindrical or needle-shaped, and a plating layer is provided on at least a part of the surface of the plug part.

4. The aluminum conductor connection structure of claim 3, wherein the plating layer is made of one of nickel, cadmium, manganese, zirconium, cobalt, tin, titanium, chromium, gold, silver, zinc, tin-lead alloy, silver-antimony alloy, palladium-nickel alloy, graphite silver, graphene silver, or silver-gold-zirconium alloy.

5. The aluminum wire connection structure according to claim 1, wherein the first connection portion is cylindrical, or U-shaped, or flat plate-shaped, or bowl-shaped.

6. The aluminum wire connection structure as defined in claim 1, further comprising a transition portion between the insertion portion and the first connection portion, the transition portion being bendable.

7. The aluminum wire connection structure according to claim 1, wherein an end of the second connection portion remote from the first connection portion is provided with a crimping wing, and the crimping wing wraps a portion of the insulating layer.

8. The aluminum wire connection structure as claimed in claim 2, wherein a ratio of a length of the first connection part to a length of the conductor crimp part is 1 to 4.

9. The aluminum wire connection structure as claimed in claim 1, wherein a ratio of the length of the wire core to the length of the first connection part is 0.5 to 1.5.

10. The aluminum wire connection structure as claimed in claim 2, wherein a ratio of a diameter of the conductor crimp part to a diameter of the wire core is 1.0 to 1.5.