Patent ID: 7066798
Filing Date: 2006-06-27
Classification: B24B

Abstract:
1. An adapter for coupling a source of rotary power to a grinding roller, the adapter comprising: a grinding shaft sleeve of a cylindrical shape having one open end and another end for coupling to a rotary shaft of a power unit, and having at least one through hole formed at a selected position on an outer circumferential surface thereof; a stroke shaft received in said open end of the grinding shaft sleeve, for reciprocating and rotational movement with respect to said grinding shaft sleeve, said stroke shaft including at least one guide groove having a surface curvature which varies with respect to a shaft direction, the stroke shaft formed at a position corresponding to the through hole of the grinding shaft sleeve, and the stroke shaft having one end separably coupled with a drum-shaped grinding roller; a stroke generating unit affixed to said grinding shaft sleeve, said stroke generating unit including a bearing fitted into the guide groove through the through hole of the grinding shaft sleeve such that, when the grinding shaft sleeve is rotated, said bearing moves along the guide groove while allowing the stroke shaft to reciprocate and rotate with respect to the grinding shaft sleeve; a sealing means interposed between stroke shaft and the grinding shaft sleeve, for preventing leakage of oil; and a sealing cover for sealing an oil passage which extends through the grinding shaft and the closed end of of the stroke shaft.