| 摘要 |
PURPOSE:To obtain the torsional rigidity as desired, miniaturize the coupling, and to enlarge the scope of application, by imbedding an endless cord, which envelopes the parallel collars arranged in a circular form as the collars stand neighboring to each other, into a rubber material in such a manner that the collars corresponding to each other are in sagging. CONSTITUTION:Leaving out a central, bridged part 10 situated between collars 1 and 1 neighboring to each other, a rubber material 3 is provided with lightening hollow parts 11 and 11, which are situated between the collar 1 and the central, bridged part 10, and a pair of retaining plates 12 and 12, each of which faces to the sagging part of each endless cord 2. Both ends of these plates 12 are exposed to the corresponding, lightening hollow part 11 and are imbedded into the rubber material 3. In this case, one of the alternate collars is joined to one shaft, while the other one is joined to the other shaft by means of the bolt. Accordingly, the torsional rigidity as desired such that it is low for a small twist angle (range) but it is high for a large twist angle can be obtained. At the same time, since the size of the coupling can be reduced, we can take advantage of the merits in the strength of both bolts and bolt-joined part, thereby enlarging the scope of application of the coupling.
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