| 摘要 |
<p>In a positive releasable coupling comprising a shaft, a hub on said shaft, the shaft and hub having end faces lying in substantially the same plane and being provided with aligned slots cut into their end faces, a coupling disk provided with teeth complementing and engaging the slots of said shaft and said hub and thereby coupling said shaft to said hub, and means for securing said disk to at least one of said shaft and said hub, the improvement which comprises forming said disk as an annulus held against the ends of the shaft and hub by a cap secured to the shaft by a bolt. The disk is provided with radially directed wedge shaped teeth, the faces of the teeth in radial cross-section making about 45 DEG angles with the plane defining the ends of the shaft and hub with the apex being located in the vicinity of the outside surface of the shaft; in cross-section tangenial to the shaft the teeth are tapered toward the shaft. The ends of the shaft and hub are slotted so as to mate with the teeth of the disk and are thereby coupled. Advantageously the disk is deformable between the teeth and is provided on its face adjacent the cap with spaced projections which constitute the points of contact therebetween.</p> |
