Rack-pinion type power steering apparatus
US6216813A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1997 |
| Grant date | Apr 17, 2001 |
| Priority date | — |
| Expiry date | Jun 10, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D5/083
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A rack-pinion type power steering apparatus includes a cylindrical stub shaft, a torsion bar, a pinion shaft, a rotor, and a sleeve. The stub shaft rotates in a steering body upon a steering operation. The torsion bar has one end fixed at one end of the stub shaft and extends toward the other end of the stub shaft. The pinion shaft is pivotally connected to the other end of the torsion bar and has pinion teeth that mesh with a rack of a steering wheel. The rotor is arranged to cover the torsion bar from the stub shaft along an extending direction of the torsion bar. The sleeve has one end integrally connected to the pinion shaft, extends from the pinion shaft along the stub shaft, and is arranged around the rotor to constitute a rotary type channel selector valve between the rotor and the sleeve. At least two ends of an inner circumferential portion of the sleeve integrally connected to the pinion shaft have slidable contact surfaces that slidably support the rotor integrally connected to the stub shaft. A bearing is arranged at either one of the two ends of the sleeve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.