Input shaft of two-gear electric vehicle transmission assembly

Abstract

The invention discloses an input shaft of a two-gear electric vehicle transmission assembly. A central blind hole is formed in the left part of a shaft body and an inner spline section is arranged at the left part of the central blind hole; the left part of the shaft body is a large-diameter section and a first axial limiting step section is arranged in the middle of the large-diameter section; the middle part of the shaft body is a middle-diameter section and the connection part of the middle-diameter section and the large-diameter section is a first-gear shaft tooth section; the right part of the shaft body is a small-diameter section; the small-diameter section is connected with the middle-diameter section by a second-gear shaft tooth section and a second axial limiting step section; the second axial limiting step section is located at the right of the second-gear shaft tooth section and is in smooth transition with the second-gear shaft tooth section by a circular-arc section with the radius of 2mm; the outer diameter of the second axial limiting step section is 30mm; and the axial length between the right end of the second axial limiting step section and the left end of the first axial limiting step section is 122.22mm. According to the input shaft, the inner spline section of the central blind hole can be used for reliably bearing power and the power is transmitted by the first-gear shaft tooth section and the second-gear shaft tooth section; and the input shaft is compact in structure, can meet installation requirements and has good adaptability.

Description

technical field [0001] The invention belongs to the field of transmissions, and in particular relates to an input shaft of a transmission assembly of a second-speed electric vehicle. Background technique [0002] The existing electric vehicle transmission assembly has a one-gear structure, that is, it cannot change gears, so its output torque and rotating speed cannot be adjusted according to road conditions, resulting in poor adaptability to road conditions. In order to overcome the above-mentioned technical defects, we want to specially design a transmission assembly with two gears. At the same time, the input shaft needs to be designed accordingly during the design process. The input shaft must not only have a compact structure and reliable force transmission, but also meet the installation requirements. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a second-speed electric vehicle transmission assembly inpu...

AI Technical Summary

Problems solved by technology

[0002] The existing electric vehicle transmission assembly has a one-gear structure, that is, it cannot change gears, so its output torque and speed cannot be adjusted according to road conditions, resulting in poor road condition adaptability

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