Claims
- 1. A power steering device for a vehicle comprising: a pinion shaft having a pinion and operably connected with a steering wheel, said pinion shaft extending into a gear box through a seal member disposed therebetween; a rack rod operatively connected to steerable wheels and having a rack in mesh with the pinion of said pinion shaft within a gear box; a power cylinder having a first and a second hydraulic chamber for hydraulically actuating said rack rod; a changeover valve for selectively connecting said first and second hydraulic chambers of said power cylinder with a hydraulic pressure source and an oil reservoir; an oscillating member rotatably mounted on said gear box and rotatably supporting said pinion shaft in a manner such that the rotation axis of said oscillating member is offset a certain distance from the axis of said pinion shaft whereby said oscillating member is caused to rotate about its rotation axis relative to said gear box when steering torque is applied to said pinion shaft; and means for operatively connecting said oscillating member to said valve such that said valve is actuated by the rotary movement of said oscillating member, the improvement comprising said oscillating member being in the form of a cage containing and partially surrounding said pinion, bearing means supported by said gear box and surrounding said cage, said pinion shaft extending from one axial end of the cage and being located inside said bearing means, said bearing means supporting said cage for movement of said cage relatively to said gear box exclusively about the longitudinal axis of said cage, whereby said cage is caused to oscillate about its longitudinal axis relative of said gear box when steering torque is applied to said pinion shaft; and means operatively connecting said oscillating cage to said changeover valve such that said changeover valve is actuated by rotary movement of said oscillating cage.
- 2. A power steering device as set forth in claim 1, wherein the rotation axis of said oscillating member lies intermediate the axis of said pinion shaft and the meshing point between the pinion and rack.
Priority Claims (1)
Number |
Date |
Country |
Kind |
53-140695 |
Nov 1978 |
JPX |
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Parent Case Info
This is a division of application Ser. No. 92,499 filed Nov. 8, 1979, now U.S. Pat. No. 4,299,302.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4299302 |
Nishikawa et al. |
Nov 1981 |
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Divisions (1)
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Number |
Date |
Country |
Parent |
92499 |
Nov 1979 |
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