| 摘要 |
PURPOSE: To improve the heat conductivity by providing two bearing surfaces on an outer race, and tracks for supporting a separator and a bearing surface on an inner race, and elastically pressing an inner race part having the bearing surface so that a ball applies a force orthogonal to each bearing surface to simply eliminate a trouble of a drag torque. CONSTITUTION: Bearing surfaces 100, 102 are provided on an outer race 14, a bearing surface 96 and a first roller track to support a separator 40 are provided on an inner surface 16, and a second roller track is formed in a side plate 64 of the inner race. A movable race part 92 of the inner race having a bearing surface 98 formed thereon is elastically pressed by a coil spring 110 toward a side plate 60 of the inner race. A ball 18 applies a force orthogonal to four bearing surfaces 96, 98, 100 and 102. A trouble by the drag torque is eliminated with a relatively simple constitution over an extensive temperature range with excellent heat conductivity and without any leakage from a seal. |
