| 摘要 |
<p>A dynamic tooth clutch, interposed between two rotating members for coupling same, includes a first collar slidably mounted on one of the members and has a plurality of equally angularly spaced axially extending radial first teeth. A second collar is fixed to the other member and has a plurality of equally angularly spaced axially extending radial second teeth that are adapted to intermesh with the first teeth and are so angularly spaced that, when the first and second teeth are centered relative to one another, there is a first predetermined amount of bidirectional angular rotational movement therebetween before there is abutment of adjacent tooth side surfaces. A cam ring coacts with the second collar, with the cam ring being capable of a predetermined amount of bidirectional rotational movement relative to the second collar. The cam ring, which is preloaded and self-centered relative to the second collar, has a plurality of teeth, with the cam ring teeth, having a greater angular extent than either the first or second teeth, being adapted to intermesh with the first teeth, with the axial clearance between the outer axial end faces of the first and second teeth being less than the axial clearance between the outer axial end faces of the first teeth and the cam ring teeth. The outer axial end faces of the second teeth are provided with chamfer surfaces so that upon the abutment of the interfering portions the adjacent side faces of the first and second teeth, the chamfer surfaces cause a slight axial outward movement of the first teeth thereby disrupting the axial outer end face abutment between the first teeth and the cam ring teeth so as to prevent corner hang-up.</p> |
