Aluminium wire-contained motor joint and processing method thereof

Abstract

The invention discloses an aluminium wire-contained motor joint comprising an aluminium enameled wire and a wiring terminal. A clamp groove is formed in the motor and includes an aluminium enameled wire leading-out wire accommodation portion and a wiring terminal accommodation portion; an aluminium enameled wire leading-out wire is pressed into the aluminium enameled wire leading-out wire accommodation portion and penetrates the wiring terminal accommodation portion; and the wiring terminal is pressed into the wiring terminal accommodation portion with a pointed portion. When the wiring terminal is pressed into the wiring terminal accommodation portion, the pointed portion punctures the enamelling layer of the aluminium enameled wire, thereby completing condution with the aluminium wire. According to the processing method, the aluminium wire is compressed by using the wiring terminal and the clamp groove instead of using the traditional heat-shrinkable bush, thereby not only ensuring the oxidation-resistant capability and preventing phenomena of short circuit and poor contact at the joint but also improving the aluminium wire joint protection reliability. The motor running reliability is improved and easy production and operation are also realized.

Description

technical field [0001] The invention relates to the field of motors, in particular to an aluminum wire motor joint and a processing method thereof. Background technique [0002] With the sharp rise in the price of copper, the cost pressure of the motor industry is increasing day by day. Due to the abundant resources of aluminum, the price is relatively cheap, less than 1 / 2 of the price of copper; its specific gravity is small (2.7t / m for aluminum 3 , copper is 8.89t / m 3 ), less than 1 / 3 of the proportion of copper, the cost advantage of aluminum is quite obvious, and it is more convenient in transportation and laying. [0003] Due to cost control, more and more motor manufacturers have begun to produce aluminum wire motors. However, due to the good conductivity of copper conductors, except for pure silver, copper has the highest conductivity, and the conductivity of aluminum is only 62% of that of copper. Copper has high mechanical strength and high corrosion resistance,...

AI Technical Summary

Problems solved by technology

Using common welding methods, it is impossible to combine the two substances together, and because the oxidation temperature of aluminum is relatively low, it is easy to form an oxide layer on the surface, which hinders welding and reduces the service life of the motor

[0006] Because the chemical properties of metal aluminum are very active, the following two difficulties will arise in the production process of aluminum wire motors: 1. After high temperature, the aluminum wire will be oxidized rapidly, or even blackened, forming a layer of oxide film, which makes welding difficult

2. The aluminum wire joint must be sealed to prevent oxidation, but this will reduce the electrical conductivity and reduce its service life

[0010] Using traditional heat-shrinkable sleeves for protection, it is easy to shrink in place during processing, and the heat-shrinkable tubes are easy to fall off, resulting in protection failure, aluminum wires are oxidized, and copper-aluminum joints are poorly contacted or broken.

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