| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a deep groove ball bearing and a bearing device capable of restraining lubricating oil and foreign matter mixed in the oil from intruding into the bearing inside. <P>SOLUTION: A ball 31 is incorporated between a track groove 12 of an outer race 11 and a track groove 22 of an inner race 21, and the ball 31 is held by a cage 40. Among the four shoulders 13a, 13b, 23a and 23b in total respectively formed on both sides of the outer race track groove 12 and the inner race track groove 22, a height of one side shoulder 13a of the outer race 11 and the other side shoulder 23b of the inner race 21 is set higher than the residual shoulders 13b and 23a, to prevent running-on to the shoulders 13a and 23b of the ball 31 by supporting thrust force by the shoulders 13a and 23b of a high height. The cage 40 is formed of a first divided cage 41 and a second divided cage 42 fitted to the inside and outside. A flange 53 is arranged in one side part of the second divided cage 42, and very small clearances 54 are formed between the flange 53 and an inner diameter surface of the shoulder 13a of a high height of the outer race 11 and between the flange and an outer diameter surface of the shoulder 23a of a low height of the inner race 21, to restrain the foreign matter from intruding into the bearing inside. <P>COPYRIGHT: (C)2013,JPO&INPIT |
