| 摘要 |
1,069,824. Positive clutches. MAAG GEAR WHEEL & MACHINE CO. Ltd. Feb. 15, 1966 [Feb. 17, 1965], No. 6551/66. Heading F2C. In a positive clutch the teeth on one of the clutch members, when in the disengaged position, are disposed between rows of circumferentially staggered teeth on the other member, whereby if one set of teeth are so positioned as to block movement of the member in one direction engagement may still be effected by moving the member in the opposite direction. In the form shown a toothed hub 2 on the driving shaft 1 is engaged by an axially movable sleeve 3 whose other end carries a row of teeth 6 which in the neutral position are disposed between two rows of teeth 7, 8 on a second hub 9 secured to the driven shaft 10. The teeth 6, 7, 8 are of the same pitch, but teeth 7, 8 are circumferentially staggered by a half pitch, and the opposed ends of the teeth are chamfered so that engagement can be effected by moving sleeve 3 to the right if leftward movement is blocked, or conversely. In an alternative form, Figs. 7-12 (not shown), the sleeve 3 carries two rows of staggered teeth mounted between three rows of aligned teeth on the hub 9, the tooth thickness being one quarter of the pitch and the teeth all having blunt square ends. |
