| 摘要 |
<P>PROBLEM TO BE SOLVED: To relax stress concentration generated on a rear cover in attachment to an axle in a bearing device for a railway vehicle. <P>SOLUTION: The bearing device for the railway vehicle includes a double row tapered roll bearing, seal devices at axial direction both ends, and a front cover and a rear cover positioning an inner ring in an axial direction. The rear cover includes a fitting surface 41 fitting with the axle 2, a receiving surface abutting on the inner ring in the axial direction and receiving axial fastening force of a bolt, an abutting surface abutting of the axle 2 in the axial direction, a large diameter 44, and a sliding contact surface 45 with a seal lip. A prescribed gap is formed between an inner circumference surface at an axial end side of the fitting surface 41 and the axle 2. A corner 46 at the outer diameter side nearest to an end edge 50 at an axle end side of the fitting surface 41 has a shape including two or more cross sections R. In the concrete, the corner 46 is composed of a first cross section R 47 connecting to the sliding contact surface 45, a second cross section R 48 connecting to the end surface 44a at axle end side of the large diameter 44, and an inclined tapered surface 49 connecting the first cross section R 47 and the second cross section R 48. <P>COPYRIGHT: (C)2011,JPO&INPIT |
