Improved EPS sensor unit assembly

Abstract

The invention relates to the technical field of automobile steering column parts, in particular to an improved EPS sensor unit assembly. Two arc-shaped limiting bosses are fixed at one end of an inputshaft, and a pressure riveting point I is formed at the other end of the input shaft; two sets of grooves are formed in one end of a steering gear, and a second rivet pressing point and a positioningpoint are arranged at the other end of the steering gear. The smooth cylindrical end of a torsion bar is in interference fit with the steering gear; the spline end of the torsion bar penetrates through a bearing and extends into the torsion bar matching hole of the inner hole of the input shaft, a groove and an arc-shaped limiting boss are fixed in a clamped mode, a torque magnet is fixed to theposition of the first rivet pressing point in a rivet pressing mode, and the torque sensor is fixed to the position of the second rivet pressing point and the position of the positioning point in a rivet pressing mode. The part-pipe in the traditional sensor unit small assembly is saved, the connection reliability of the input shaft and the steering gear is improved, the torsion bar is matched with the input shaft without using a positioning pin, so that the assembly cost is saved; and an exhaust hole in the input shaft is omitted, and the input shaft machining process is simplified.

Description

technical field [0001] The invention relates to the technical field of automobile steering column components, in particular to an improved EPS sensor unit assembly. Background technique [0002] In the design of automobile steering gear, the torque exerted by the driver on the steering wheel is transmitted to the component input shaft of the small assembly of the sensor unit through the steering intermediate shaft. The driver turns the steering wheel, and the hand torque is transmitted to the input shaft of the sensor unit assembly of the lower steering gear through the upper steering column. Rotate, the torque sensor sends an assist request signal to the assist motor of the EPS. After the EPS power-assisted motor receives the signal from the torque sensor, it will drive the EPS rack to move. The movement of the EPS rack will drive the components on the sensor unit to turn to the gear. The power assist effect of electronic power steering. [0003] In the traditional desig...

AI Technical Summary

Problems solved by technology

In order to prevent the radial rotation of the torsion bar and the input shaft, it is necessary to drill holes on the input shaft and the torsion bar and insert positioning pins, so the assembly process is more complicated

In order to ensure that the torsion bar cooperates with the input shaft and the steering gear, and the seal is reliable, it is necessary to increase the pipe assembly and the O-ring assembly on the torsion bar, which increases the cost of parts

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