Electric power steering pump for electric automobile

Abstract

The invention discloses an electric power steering pump for an electric automobile. The electric power steering pump comprises a motor and a pump body, wherein the motor and the pump body are mutually connected through a pump connecting body and sealed; an external spline is machined at the end part of the output shaft of the motor; the output shaft penetrates through the pump connecting body and is connected with an oil pump rotor of the pump body through the external spline, and further directly drives the oil pump rotor of the pump body to rotate. The electric power steering pump has the advantages that the motor and the pump body share one transmission shaft, the design of a motor end cover can be omitted, the design of a sealing system between the motor end cover and the output shaft can be correspondingly omitted, the cooling efficiency of the motor can be further enhanced through the design of a circulating oil way, the service life of equipment can be prolonged, and use and maintenance costs are saved.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, and relates to an electric power steering pump, in particular to an electric power steering pump for electric vehicles. Background technique [0002] Such as Figure 1-2 As shown, the current power steering pump of an electric vehicle uses a motor 1' to drive the pump body 2', and the output shaft 11' of the motor 1' and the input shaft 21' of the pump body 2' are driven through a spline connection. Wherein, based on power transmission requirements, the end of the output shaft 11' of the motor 1' is an internal spline, and the end of the input shaft 21' of the pump body 2' is an external spline. Since the processing technology of the spline is very complicated, the cost of such a structural design is very high. [0003] In the driving structure of the power steering pump, the end of the motor 1' is provided with a motor end cover 12' for sealing, and the end of the pump body 2' is prov...

AI Technical Summary

Problems solved by technology

The functions of the two sets of sealing structures overlap, resulting in increased design and processing costs

[0004] At the same time, when the power steering pump is running, the motor will generate a lot of heat. Usually, the heat is dissipated by the fan at the rear of the motor. The heat dissipation efficiency is relatively low, so it will affect the service life of the motor and make the design of the power steering pump Further increase in cost and use cost

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