Patent ID: 6402158
Filing Date: 2002-06-11
Classification: F16C,F16J

Abstract:
A non-contact plastic or rubber seal disk for a bearing, providing improved sealing performance, said seal disk comprising an outer peripheral portion to be captured in a ring-shaped seal groove of U-shaped section formed inside each shoulder of an outer ring of a bearing and comprising an inner inside wall perpendicular to the axis of the bearing, a bottom wall, and an open-out-formed outer inside wall, with said peripheral portion in elastic contact with said inner inside wall and said outer inside wall of the groove, and said seal disk being configured so as to provide a very narrow gap between a bore wall of the seal disk and an inner ring of the bearing,wherein said groove is provided with a ring-shaped protrusion on the inner inside wall of the seal groove at anouter edge of a land of the outer ring, wherein said seal disk is provided with: on the back side of said peripheral portion thereof, a ring-shaped raised area of trapezoid-like section that can be brought into area contact with the inner inside wall of the seal groove; on the face of said peripheral portion thereof, a ring-shaped thin projection that is brought into elastic contact with the outer inside wall of said seal groove; and a ring-shaped sealing recess formed just inside said trapezoid-like raised area on the seal disk, the recess coming into contact with at least part of the ring-shaped protrusion formed on the inner inside wall of the seal groove, and wherein the seal disk thus configured is pushed into the seal groove, and at least part of the ring-shaped protrusion in said seal groove is brought into contact with the sealing recess of said seal disk, whereby the seal disk is mounted in the bearing concentrically with the bearing axis as center.