Transmission shaft, transmission shaft assembly and transmission shaft welding method

Abstract

The invention discloses a transmission shaft. The transmission shaft comprises a shaft tube, a spline sleeve and a universal joint fork, wherein the shaft tube is provided with a first end part and asecond end part; the spline sleeve is inserted into the interior of the first end part of the shaft tube, the inner wall of the first end part of the shaft tube is connected with the outer wall of thespline sleeve through magnetic pulse welding, and the axis of the spline sleeve is coaxial with the axis of the shaft tube; and the universal joint fork is inserted into the interior of the second end part of the shaft tube, the inner wall of the second end part of the shaft tube is connected with the outer wall of the universal joint fork through magnetic pulse welding, and the axis of the universal joint fork is coaxial with the axis of the shaft tube. According to the embodiment, the shaft tube is connected with the spline sleeve and the universal joint fork through magnetic pulse welding,the welding quality stability is good, the welding strength is not lost, namely, the weld joint strength is improved; and the shaft tube is made of an aluminum alloy material, so that the mass of thetransmission shaft is reduced; and the transmission shaft is low in cost and suitable for assembly lines and professional production lines for mass production.

Description

technical field [0001] The present application relates to the technical field of automobile transmission shaft assembly, in particular to a transmission shaft, a transmission shaft assembly, and a transmission shaft welding method. Background technique [0002] In the existing welding process of the shaft tube of the automobile transmission shaft, the universal joint yoke and the sliding spline sleeve, the traditional welding process is basically adopted, for example, flash welding, CO2 gas shielded welding, etc. Its disadvantage is that groove processing must be carried out, and poor welding is prone to occur. The welding deformation at the joint is relatively large, and the bending accuracy is very low. Due to the serious spatter during welding, the assembly surface of the cross is often adhered by molten metal slag, which is difficult to remove, damages assembly accuracy, and has a great impact on product quality. [0003] In recent years, a small number of enterprises ...

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Problems solved by technology

[0004] 1) It is realized by workpiece rotation, friction, and top pressure; 2) The welding heat is large, which reduces the mechanical strength of the base metal around the weld at the joint; 3) The equipment has a high degree of automation and complex technology, strong professionalism, and large limitations. Not suitable for assembly lines and professional production lines for mass production

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