Patent ID: 7040988

Claim:
A compression elastic coupling device for coupling a drive shaft and a driven shaft coaxially disposed with a predetermined axial interval between ends thereof, comprising: a drive flange capable of being fixedly mounted on an end of the drive shaft, the drive flange being provided, on a surface facing the driven shaft, with a plurality of drive protrusions arranged at equal angular intervals; a driven flange capable of being fixedly mounted on an end of the driven shaft, the driven flange being provided, on a surface facing the drive shaft, with a plurality of driven protrusions arranged at equal angular intervals so as to be interposed between adjacent drive protrusions of the drive flange; and power transmitting elastic members radially inserted in spaces between adjacent drive and driven protrusions and from outer circumferences of the drive flange and the driven flange toward a central axis of the drive shaft and the driven shaft, wherein: each of the elastic members has an elastic body and a pair of substantially plate-shaped holding pads bonded to side surfaces of the elastic body, the side surfaces of the elastic body face the drive protrusion and the driven protrusion, respectively, one of the pair of holding pads is fastened to the drive protrusion at both an outer circumferential part of the holding pad with a radially extending bolt and a radially middle part of the holding pad with a circumferentially extending bolt, and another of the pair of holding pads being fastened to the driven protrusion at both an outer circumferential part of the holding pad with a radially extending bolt and a radially middle part of the holding pad with a circumferentially extending bolt.