| 摘要 |
PURPOSE: A bearing is provided to be slid by forming at least two rails in a part with a turning wheel inscribed. CONSTITUTION: The bearing comprises:a side board(11) having a round flow hole(12) in one side of a track roller(10); more than two rails(20); a leading groove(21) formed to pack the grease in the both sides of the rails(20); a turning wheel(30) of a ring shape having a packing(31) to operate an air-tightness in the both sides; a covering board(40) having a flow hole(41) to hermetically seal a contact unit of the turning wheel(30) to a vacuous state.
|
