Electrically assisted, power steering system for motor vehicles

US7032704B2 · kind B2 · utility

Assignee

• Ina Schaeffler KG · DE

Inventors

• Alexander Zernickel · Herzogenaurach, DE
• Jorg Wagner · Königsee, DE

Key dates

• Filing date: Jul 9, 2004
• Grant date: Apr 25, 2006
• Expiry date: Jul 9, 2024

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16C33/34
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An electrically assisted, power steering system for motor vehicles having an input shaft (6) connected to a pinion shaft (2) by a torsionally elastic member (5) is supported in a steering housing (1) by a rolling bearing. The rolling bearing is formed as an elastic, flexible roller bearing (13), whose cylinder rollers (13.5, 13.6) have at least at one peripheral position an elastically deformable cylinder roller (13.6), having a diameter that is slightly greater than a diameter of the other cylinder rollers (13.5). In this way, an exact guidance of the input shaft (6) is achieved, so that the applied steering torque can be used accurately by an evaluation unit (15) for controlling the servo motor (7).