Four-wheel steering system for vehicle
US4646867A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 1985 |
| Grant date | Mar 3, 1987 |
| Priority date | — |
| Expiry date | Oct 24, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D7/1527
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A four-wheel steering system comprises a steering wheel; a steering shaft which is connected to the steering wheel to be rotated in response to operation of the steering wheel and is provided with a first pinion fixedly mounted thereon; a rack bar which is supported for sliding motion in the transverse direction of the vehicle body, is provided with a first rack gear in mesh with the first pinion and a second rack gear, and is connected to the right and left front wheels by way of tie rods, a rear wheel turning force taking-out mechanism which includes a second pinion in mesh with the second rack gear on the rack bar and a rod member connected to the second pinion, and which converts the sliding motion of the rack bar into rotation of the rod member; and a rear wheel turning mechanism which is arranged to turn the rear wheels in response to rotation of the rod member. There are provided a first resilient pressing mechanism which presses one of the first and second rack gears, from the rear, towards the pinion in mesh therewith, and a second resilient pressing mechanism which presses the pinion in mesh with the other of the first and second rack gears toward said the other of the fi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.