| 摘要 |
<p>A centre take-off power assisted steering comprises a rack (1) and a pinion (2). The rack is constrained radially in a pressure fluid cylinder(3) at two positions and has a floating p iston (30) at one end. One constraint comprises a bearing (5) disposed at the point where rack and pinion mesh. With this arrangement meshing of the rack and pinion is not dependent on rack stiffness, manufacturing tolerances are compensated for and the effects of service loads are minimised, whilst allowing equal area pistons at opposite ends of the cylinder (3).</p> |
