| 摘要 |
A frustro-conical holding ring is adapted to seat on a shaft; a closed outer holding ring having an internal frustro-conical surface seats and surrounds the first holding ring. To center these rings on the shaft and within the hub, cylindrical centering rings adapted to seat against the inner surface of the hub and on the shaft are formed adjacent the thicker ends of each of said rings, the cylindrical centering rings extending over a radial distance greater than the thickness of the thickened end to overlap the thinner end of the other ring, and center the holding rings on the shaft and within the hub. Disks of elastic material, such as rubber or plastic disks may be located between the end faces of a holding ring and the inner end face of the centering ring adapted to fit thereagainst to form an elastic and sealing insert. The entire arrangement can be tightened by relative axial shifting of the two holding rings against each other, for example by circumferentially arranged holding screws, a central screw with an interposed disk spring or the like. The center rings may be radially slitted, the radial slits extending into the holding rings.
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