| 摘要 |
<p>1466883 Hooke's joints NADELLA and A PITNER 21 May 1974 [25 May 1973] 22619/74 Heading F2U [Also in Division B3] A method of forming a bearing surface 13 on a central portion of the end face 12 of at least one of the trunnions 1 of a metal universal joint cross member 2, the surface being formed at a desired distance b from a reference point 0 in the cross-member, comprises performing a pressing operation by a tool 21 on a cross-member blank having a central end portion at a distance a from the reference point, thereby cold upsetting the central end portion to form the bearing surface at the desired distance from the reference point. The trunnion 1 is capped by a coldformed sheet metal cup 3 enclosing needles 4 and a resilient washer 16 which includes a planar part 17 bearing against an annular ridge 18 on the cup. The planar part may alternatively be dished, Figs. 2, 3 (not shown), when it is of smaller diameter than the cup opening defined by a flange 9. The bearing surface may be formed by a convex end surface (53) of a spigot (55),-Figs. 5, 6 (not shown), and lubricating grooves (59) are formed in the surface (53). The press tools 21 are, in this case, provided with concave or hollowed out centre portions to shape the spigots (55) and the distance a is consequently less than the final distance b.</p> |
