Mandrel assembly mechanism of a C-EPS and gap adjusting method thereof

Abstract

The invention provides a mandrel assembly mechanism of a C-EPS. A steering assembly is provided with a shaft sleeve, a worm wheel arranged on the shaft sleeve in a sleeving manner, a supporting base arranged on the shaft sleeve in a sleeving manner and a torsion bar inserted into the shaft sleeve in a penetrating manner. A mandrel comprises a first section and a second section, a flange is formedat the joint of the first section and the second section in a protruding manner, a stepped hole is formed at the center of a positioning ring, the positioning ring is arranged on the mandrel in a sleeving manner, and the flange is contained in the stepped hole. A middle valve body assembly is arranged on the shaft sleeve in a sleeving manner and abuts against the worm wheel, a front valve body assembly is arranged on the shaft sleeve in a sleeving manner and located at the side, away from the worm wheel, of the middle valve body assembly, the first section of the mandrel is inserted into the shaft sleeve in a penetrating manner, and the positioning ring is located at the side, away from the worm wheel, of the supporting base. The torsion bar is inserted into the mandrel in a penetrating manner; and the mandrel is sleeved with a rear valve body assembly, and the rear valve body assembly is located at the side, away from the worm wheel, of the supporting base and abuts against the positioning ring.

Description

【Technical field】 [0001] The invention relates to the technical field of automobile steering, in particular to a C-EPS mandrel assembly mechanism and a gap adjustment method thereof. 【Background technique】 [0002] The mandrel of the existing C-EPS (column type electric power steering) is to insert the mandrel into the lower steering mandrel assembly to form a workpiece, and then put the workpiece into the rear valve body assembly, and the rear valve body assembly takes the work piece The parts move to the middle valve body assembly and are inserted on the middle valve body assembly. The middle valve body assembly automatically clamps the lower steering mandrel in the workpiece, and the rear valve body assembly, the middle valve body assembly and the workpiece move together. In the front valve body assembly, the front The valve body assembly automatically clamps the lower steering spline, but due to the difference in the consistency of the workpiece, when the mandrel is inse...

AI Technical Summary

Problems solved by technology

[0002] The mandrel of the existing C-EPS (column type electric power steering) is to insert the mandrel into the lower steering mandrel assembly to form a workpiece, and then put the workpiece into the rear valve body assembly, and the rear valve body assembly takes the work piece The parts move to the middle valve body assembly and are inserted on the middle valve body assembly. The middle valve body assembly automatically clamps the lower steering mandrel in the workpiece, and the rear valve body assembly, the middle valve body assembly and the workpiece move together. In the front valve body assembly, the front The valve body assembly automatically clamps the lower steering spline, but due to the difference in the consistency of the workpiece, when the mandrel is inserted into the steering assembly, the gap between the worm gear end face of the steering assembly and the middle valve body assembly is uncontrollable and cannot meet the requirements of C -The accuracy requirements of the core shaft assembly mechanism of EPS may easily lead to defective products

Images