connection structure

Abstract

The present invention provides a connection structure, which uses an aluminum alloy as the second conductor constituting the connected body, seeks to optimize the mechanical properties of the compressed part and the non-compressed part of the second conductor, thereby being lightweight and reliable in connection, and It is also not easy to cause necking and broken wires. The connection structure (1) of the present invention directly connects the first connection part (21) to the connected body (3) by compressing the first connection part (21) of the first conductor (20) constituting the connection part (2). ) of the second conductor (30) of the second connecting portion (31) to form an electrical connection structure, the first conductor (20) is made of copper or copper alloy, the second conductor (30) is made of aluminum alloy, and the second When the conductor (30) is in the state where the electrical connection structure is formed, the Vickers hardness HV1 when measured at the position of the second connection part (31) is 110 or more, and at the position of the second conductor (30) where the electrical connection structure is not formed The Vickers hardness HV2 at the time of measurement is 80% or more of the above-mentioned Vickers hardness HV1.

Description

technical field [0001] The present invention relates to a connection structure, which directly connects the first connection part to the second connection part of the second conductor constituting the connected body by compressing the first connection part of the first conductor constituting the connection part, and uses the The conductor made of aluminum alloy is used as the second conductor, or both of the first and second conductors to form an electrical connection structure, which is lightweight, has excellent connection reliability, and is less prone to necking and disconnection. Background technique [0002] In order to electrically connect the conductors of wires and cables (hereinafter, they may be collectively referred to as "wires, etc.") and terminals, or the conductors of wires, etc., the connection structure formed by interconnecting is usually made of copper or copper alloy. Copper-based materials are used as conductors such as electric wires, or as both conduc...

AI Technical Summary

Problems solved by technology

[0014] However, the method of forming serrations on the conductor connection portion constituting the connection member has the following problems: the structure of the connection member is complicated, so the cost increases, and in order to improve the connection strength, it is necessary to sink the apex of the serration into the conductor connection portion of the electric wire. , which leads to necking and broken wires when the diameter of the wire material constituting the conductor connection part of the electric wire is thin, and the range of application is limited

[0016] However, in the connection structure described in Patent Document 3, as long as the length of the (coil) main body made of an aluminum-based conductor is a length that can always be extended within the range (distance) used at the construction site, etc., the construction site If it is necessary to change the length, the length of the coil body (aluminum conductor) may be insufficient or longer than As a result, the handleability of the material deteriorates, and it is impossible to achieve sufficient weight reduction.

[0017] As mentioned above, under the prior art, it is impossible to obtain a connection structure that can be applied even in the following envisaged applications, especially a connection structure that is lightweight, has excellent connection reliability, and is less likely to cause necking and disconnection, so The above-mentioned application is in response to the current trend of large current and high temperature of the operating environment, and a large current is passed through the wire, etc., or the wire is used in a high temperature environment, etc.

In these applications, when the conductors of wires and the like are replaced with aluminum-based materials from copper-based materials, there is a risk of fire accidents. Therefore, the current situation is that copper-based materials are still used as conductors of wires and the like. Cases in which connection structures formed using aluminum-based materials as conductors such as electric wires are used for the above purposes

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