| 摘要 |
1,150,532. Making universal joints. GENERAL PRECISION SYSTEMS Inc. 7 July, 1967 [16 Dec., 1966], No. 31360/67. Heading B3A. [Also in Divisions F2 and G1] A universal joint machined from a single piece of material comprises an intermediate ring 18 connected by thin radial webs 21, 23 and 22, 24 to top and bottom rings 12, 16 respectively. The joint is shown in exploded view in Fig. 2, and is made from a blank having a cylindrical outer member connected by roughly machined webs 21-24 to the inner ring. The webs are first accurately machined by counter rotating jigs to the required thickness, then four apertures 51-54 having a diameter D greater than the thickness of the intermediate ring are drilled in the outer member. A pair of chordal slots 58, 60 interconnecting the apertures 51, 52 and 53, 54 are then cut in the outer member in a plane displaced from one face of the intermediate ring 18. Finally, a second pair of slots 78, 80 interconnecting the apertures 52, 53 and 51, 54 are cut in a plane displaced from the other face of the intermediate ring to effectively divide the blank into the three rings. |
