| 摘要 |
There is disclosed a cylindrical roller bearing (14) comprising an inner ring (1) having a raceway (1a) on an outer periphery thereof, an outer ring (2) having a raceway (2a) on an inner periphery thereof, and a plurality of cylindrical rollers (3) rotatably arranged between the raceway (1a) of the inner ring (1) and the raceway (2a) of the outer ring (2). At least one of the inner ring (1) and the outer ring (2) is provided with collars (1b) respectively on both sides of its raceway (1a), and at least one of the collars (1b) being provided with a recess (1c) at a corner where the raceway (1) intersects a collar surface (1b1). A critical skew angle &thetas;T, that is a maximum skew angle at which a boundary between an end face and a chamfer of the cylindrical roller (3) makes contact with a boundary between the collar surface (1b1) and the recess (1c), is restricted to be a predetermined angle or smaller. Contact surface pressure P increases rather drastically in proportion to skew angle &thetas; within the range of 0 < &thetas;≤&thetas;T, but because the critical skew angle &thetas;T is restricted to be small, the contact surface pressure P changes in a low range below a certain level P0 at which wear occurs in contact portions. Thus restricting the critical skew angle &thetas;T to a small angle reduces the contact surface pressure P and suppresses heat generation and wear in the contact portions. <IMAGE> <IMAGE> |
