Bearing arrangement with a seal

Abstract

A bearing housing (3) encloses a bearing (2) for a shaft (1). The bearing is mounted on the shaft by a clamping sleeve (4) with a longitudinal slit and two flanges (5,6) one on each side of the bearing. The flanges, which are axially fixed on the sleeve, are parts of mounting and dismounting means for a bearing. The bearing space is sealed by sealing members which surround the flanges and, In a preferred embodiment, the sealing members have lips (12,13) contacting the outer surfaces of said flanges. resilient sealing rings (10,11) are arranged between the flanges and the inner ring of the bearing. The sealing arrangement allows the use of a slitted clamping sleeve and axial displacement of the bearing on the shaft (1) during mounting.

Description

The In a preferred embodiment, the sealing members comprise sealing lips 12, 13 which contact the cylindrical envelope surfaces. The lips are situated on resilient sealing parts which are fitted to sheet metal rings 14, 15. Each one of these rings has a cylindrical portion which fit into a seat in the housing, and a radially inwards extending portion which covers a portion of the shaft opening of the housing around the shaft. The resilient sealing parts are arranged on the inner edges of said radially extending portion.

By the fact that the sealing members are arranged in the same planes as the flanges 5, 6 and co-operate with these, axial space is saved. The seals do not require a greater radial space than the bearing 2, and, therefore, there is no need for an extra radial space in the housing 3. The sealing lips 12, 13 have a substantial radial resiliency which allows the flanges 5, 6 to be moved a comparatively long way radially without being obstructed by the seals, which permits the shaft 1 to be tilted in the housing as much as the self-aligning ability of the bearing 2 permits. The entire arrangement is surrounded by the housing 3 so, that no rotating parts extend outside the housing, which is a positive safety feature. The device completely encloses the bearing in the housing despite the fact that slitted sleeve is used as a mounting element.

Claims

1. A device for mounting a bearing (2) on a shaft (1) in a housing (3), comprising a tapered clamping sleeve (4) provided between the bearing and the shaft, the sleeve having a longitudinal slit and a flange (5,6) arranged on either side of the bearing, sealing members (12,13,14,15,) being arranged in the housing radially outside of the surrounding the flanges, sealing lips (12,13) contacting the outer surfaces of the flanges and members (7) for moving the bearing axially on the sleeve during mounting and dismounting of the bearing being provided in the flanges, characterized by a sealing part (11,9) arranged between the bearing and the flange (6) situated adjacent the large end of the tapered portion of the sleeve (4), the sealing part being compressible in the direction of motion of the bearing during mounting on the sleeve and sealingly abutting the bearing and the flange, and a resilient sealing ring (10) provided in a groove with a variable width and limited partly by the flange (5) situated adjacent the small end of the tapered portion of the sleeve and partly by the bearing (2) or a washer (8) situated adjacent and sealingly abutting the bearing.

2. A device according to claim 1, in which each sealing member comprises a sheet metal ring (14,15) with a cylindrical portion fitting into a cylindrical seat in the housing, and a portion extending radially inwards from said cylindrical portion and partly covering the opening between the shaft and the housing, said portion having an inner edge provided with a resilient sealing part having a lip (12, 13) contacting a cylindrical envelope surface of a flange.

3. A device according to claim 1, in which the sealing ring (10) is arranged in a V-shaped groove limited by chamfered edges on the flange (5) and the bearing (2) or washer (8). 4. A device according to claim 1, wherein the sealing means comprises a sheet metal ring (14,15) with a cylindrical portion fitting into a cylindrical seat in the housing (3), and a portion extending radially inwards from said cylindrical portion and partly covering the opening between the shaft (1) and the housing (3), said portion having an inner edge provided with a resilient sealing part having a lip (12,13) contacting a cylindrical envelope surface of a flange

(5,6). 5. A device for mounting a bearing (2) on a shaft (1) in a housing (3), comprising a tapered clamping sleeve (4) provided between the bearing (2) and the shaft (1), the sleeve (4) having a longitudinal slit and a flange (5,6) arranged on either side of the bearing (2), sealing means being provided radially outside of and surrounding the flanges (5,6) and members (7) for moving the bearing (2) axially on the sleeve (4) during mounting and dismounting of the bearing (2) being provided in the flanges (5,6), wherein a sealing part (11,9) arranged between the bearing (2) and the flange (6) situated adjacent the large end of the tapered portion of the sleeve (4), said sealing part being compressible in the direction of motion of the bearing (2) during mounting on the sleeve (4) and sealingly abutting the bearing (2) and the flange (6), and a resilient sealing ring (10) provided in a groove with a variable width and limited partly by the flange (5) situated adjacent the small end of the tapered portion of the sleeve (4) and partly by the bearing (2) or a washer (8) situated adjacent and sealingly abutting the bearing (2).