| 摘要 |
PURPOSE: To exhibit an excellent stopper function with compact constitution without using separate members in stopper parts by erecting both ends of an intermediate cylinder member on a pair of ring parts, and forming the stopper parts comeing into contact with a main shaft metal fitting when the center projects to the main shaft metal fitting side. CONSTITUTION: An intermediate cylinder member 2 is formed of two bridging parts which are bridged between a pair of ring parts positioned on the axial directional both ends and partition two window parts arranged in the circumferential direction together with the ring parts and a pair of stopper parts 23 which are arranged in a circumferential directional almost intermediate position to the bridging parts so as to be bridged between the ring parts and whose axial directional intermediate part is protrusively arranged on the main shaft metal fitting side, and is integrally formed by the transformation into a pipe by winding fabrication of a thin steel pipe and an iron plate or a resin mold, a die-cast mold of light alloy or the like. Therefore, the stopper parts 23 exhibit an excellent stopper function by coming into contact with the main shaft metal fitting at vibrating time such as when a coaxial shape between an outer cylinder metal fitting 5 and the main shaft metal fitting largely collapses. |
