Rotation device with a sealing plate

Abstract

There is disclosed a rotation device, such as an overrunning clutch and a ball bearing. The rotation device includes a cylindrical inner member; a hollow cylindrical outer member coaxially and rotatably disposed on the inner member; an annular extension integrally formed with the outer periphery of the rear end face of the outer member; and an annuloar sealing plate for aligning the axes of the outer and inner members with each other. An inner space for receiving a lubricating agent is defined by the inner member and the inner face of the outer member. The inner space opens to the rear end face of the outer member. The annular extension has an inwardly opening annular groove circumferentially formed therein. The sealing plate rotatably fits around the inner member and fixedly fixed in the annular extension in such a manner that the opening of the inner space is closed by the sealing plate. The sealing plate includes: an annular plate body covering the opening of the inner space with one of its opposite faces in contact with the rear end face of the outer member; an annular peripheral, wall integrally formed with the outer periphery of the other face of the plate body; and an annular ridge integrally formed around the peripheral wall and protruding into the groove of the annular extension.