A column-assisted electric power steering device

Abstract

The invention provides a tubular booster-type electric power steering device, wherein a connecting part connected with an adapter plate is disposed on a lower shell body, the outer surface of an installation end of the connecting part is a plane, and at least three first screw holes coordinated with the adapter plate are disposed in the plane; the first screw holes are uniformly distributed on a circle with the plane center as the circle center; and furthermore, a plurality of screw hole bosses are disposed to expand a selective scope of fixation manners, so that the design objective of placement of a shell body within 360 DEG can be realized better, an applicable scope of the shell body in a C-EPS is expanded, and applicable car types increase. Aiming at deficiencies in strength and fixed points of a connecting structure between the C-EPS lower shell body and a car body in the prior art, the tubular booster-type electric power steering device provided by the invention provides a connecting structure with a large contact area and the multiple fixation manners, which satisfies demands for actual applications.

Description

technical field [0001] The invention relates to an automobile steering device, in particular to a column-assisted electric power steering device. Background technique [0002] Electric power steering, the English full name is Electronic Power Steering, referred to as EPS, which uses the power generated by the electric motor to assist the driver in power steering. The composition of EPS, although the structural components of different cars are different, they are generally similar. EPS is divided into: column assisted type (C-EPS), pinion assisted type (P-EPS), double pinion type (D-EPS), and ball screw type (APA2-EPS); column assisted type electric The power steering (C-EPS) is connected to the vehicle body through the housing, and the torque sensor, vehicle speed sensor, motor, deceleration mechanism and electronic control unit (ECU) of the C-EPS steering system are all installed in the housing. [0003] The adapter plate refers to the connecting piece used to connect the...

AI Technical Summary

Problems solved by technology

[0006] In the prior art, the connection part between the lower shell and the car body of C-EPS has a single structure, and the selection range of fixing methods is small, which cannot effectively achieve the design goal of 360° random placement; the connection part between the lower shell and the car body ( figure 1 The installation part in the middle) has large structural limitations, and the fixed contact area is small, which cannot effectively improve the strength and rigidity of the connecting part, nor can it meet the requirements of high power and high reliability for the development of EPS to medium and high-end vehicles.

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