Modular electric power assisted steering system

Abstract

A modular electric power assisted steering system comprises an input shaft unit, a first output shaft unit, a second output shaft unit and an auxiliary power unit; the input shaft unit comprises an input shaft rod extending along the first axis and rotating around the first axis; the first output shaft unit comprises a first output shaft rod extending along the second axis and rotating around the second axis under the action of linkage of the input shaft rod; the second output shaft unit comprises a second output shaft rod extending along the third axis inclining by an inclination angle relative to the second axis and rotating around the third axis under the action of linkage of the input shaft rod; the auxiliary power unit is in linkage with the first output shaft rod and the second output shaft rod according to torsion during rotation of the input shaft rod. By means of the design that the input shaft rod drives the first output shaft rod and the second output shaft rod to rotate at the same time, the modular electric power assisted steering system can be applied to different vehicle types to simplify the assembling process and reduce cost.

Description

technical field [0001] The invention relates to a vehicle auxiliary steering system, in particular to a modular electric auxiliary steering system. Background technique [0002] Most of the auxiliary steering systems of existing large vans are hydraulically assisted (HPS). The steering host itself has a power assist function, and a hydraulic pump is driven by an engine or a motor to provide the required steering power assist. In order to realize intelligent functions such as automatic driving on commercial vehicles, and to overcome the problems of insufficient motor output and the inability to actively control steering with existing HPS, products that combine electric assisted steering (EPS) modules and hydraulic steering hosts have appeared, with multiple applications for heavy trucks. [0003] Existing buses can be divided into three types according to the tonnage of the vehicle: large buses, medium-sized buses and small buses. Among them, large-scale buses mostly belong ...

AI Technical Summary

Problems solved by technology

[0006] According to the foregoing content, it can be known that the relative positions of the steering main unit and the steering column are different among different vehicle types, so when configuring the steering mechanism, it is necessary to set different types of components corresponding to different vehicle types, for example, the long front suspension type is The bevel gearbox and the corresponding connecting components must be set, while the short front suspension vehicle only needs to connect the steering column with the steering main unit. Vehicles will increase the complexity of the process, and a variety of components will also lead to increased costs

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