Patent ID: 7775721
Filing Date: 2010-08-17
Classification: F16C

Abstract:
1. A roller bearing, comprising: a sealing washer installed between a bearing inner ring and a bearing outer ring, the sealing washer having a thickened portion, which has two chamfered faces, arranged predominately in a circumferential annular groove of a first of the two bearing rings, contacting only two faces of the annular groove and forming a gap between the thickened portion and the annular groove, and the thickened portion having a rounded undercut starting at an end of one of the chamfered faces, the sealing washer having a reinforcement, an elastic sealing material and an elastic support part at an end opposite the annular groove, the elastic support part comprising a foot, a first sealing lip and a second sealing lip protruding from the foot and interacting with an undercut arranged in a second of the two bearing rings, the undercut being of asymmetrical configuration in such a way that a first shoulder, which adjoins a raceway region, and a second shoulder, which lies opposite the first shoulder, have different diameters, the first sealing lip is directed axially inwardly and is in rubbing contact only with an inner wall of the undercut, and the second sealing lip, which is predominately rectangular, is directed axially outwardly, forming a first gap seal with the second shoulder, and, radially spaced apart from the first sealing lip and the second sealing lip, a third inwardly directed sealing lip is arranged parallel to a rotational axis and perpendicular to the foot forming a second gap seal with the first shoulder, wherein, in an installed state, the elastic support part is inclined inwardly in an axial direction with respect to a plane, which extends at right angles, to the rotational axis, a pivot point and a center of mass of the elastic support part, which is arranged radially spaced apart from the latter, being arranged offset outwardly in the axial direction with respect to one another by an axial amount, with a result that, when a roller bearing rotates, a centrifugal force, which acts in the center of mass, triggers a force component, which acts in the axial direction outwardly on the first sealing lip.