| 摘要 |
<p>1,072,199. Power assisted steering. SOC. ANON. ANDRE CITROEN. Dec. 12, 1963 [Jan, 10, 1963], No. 49102/63. Heading B7H. A servo-steering system of a vehicle comprises a fixed steering housing 8a servo-cylinder (29) operatively connected by a piston (22), with a rod (21) on one side only, to steering mechanism coupled to the steerable wheels of the vehicle, a distributer valve 20 for distributing pressure fluid to the cylinder controlled by a manual steering control including first and second coaxial shafts 1 and 4 which are rotatably coupled with angular free play, as by pin-and-slot connection 18/19, and which each present a guideway 14, (16), (Fig. 3, not shown), which guideways are inclined one to the other and into which extend a pin 12 so that on relative rotation of the shafts 1 and 4 the pin 12 is displaced axially of the shafts operating a slidable valve spool 7 of the distributer to which the pin is connected by a rod 10, located within shaft 4, and a ball-and-socket connection 9. The distributer valve 20 constantly connects pressure fluid inlet 51 through valve passages 50 and 42 and valve annulus 47 and annular passage 38 of the servo-cylinder with chamber (34), (Fig. 2, not shown), on the piston-rod (21) side of piston (22) and selectively connects chamber (35) on the other side of the piston (22) with inlet 51 through valve passages 50 and 44, and annulus 47 and passage (36) of the servo-cylinder or with fluid outlet 49 through passages (36), 43, 44 and 48. As shown, piston-rod (21) is coupled to the rack (2) of rack-and-pinion steering mechanism 2, 3.</p> |
