| 摘要 |
1,007,247. Assembling poppet valves. VAUXHALL MOTORS Ltd. April 9, 1964 [April 18, 1963], No. 15291/63. Heading B3A. In the assembly of split-collar members 7 on a valve stem 11, a cylinder head 3 is mounted on a pallet and indexed to bring two valve stems 11 into register under an assembly head 15. The head 15 is moved downwards to engage a spring retainer 6 and compress the valve spring 5 until a retaining groove in the valve stem lies approximately in the plane of carrier plates 20. A ram connected to arms 28 of actuators 26 is then operated, the initial operation of which trips pawls 34 to release a pair of collar members 7 down shoots 31. Further movement of the ram brings actuator cam faces 25 into engagement with carrier plate cam faces 24 which move inwardly and press the members 7 against the valve stem 11. The actuators 26 are withdrawn and the head 15 retracted allowing the spring retainer 6 to grip the members 7. As the actuators 26 rise, pawls 34 are returned to their original position and pawls 33 are actuated to drop a pair of members on to the pawls 34. In an alternative embodiment spring-loaded plungers are mounted in the carrier plates to engage the split collar members which rest on the carrier plates. The plungers remain in contact with the members as the plates are withdrawn until they are secured by the retainer. |
