| 摘要 |
PURPOSE:To form an effective oil film with a small amount of oil by sealing up a bearing gap between both end portions of a bearing and an axle with an elastic seal member. CONSTITUTION:Circular grooves 10 are disposed in the vicinity of both ends of the inner peripheral surface of a bearing 9, and the section of the circular groove 10 is formed like a trapezoid in such a manner that the inner peripheral side is narrower than the outer peripheral side. An elastic seal body 12 is dis posed in the circular groove 10. The elastic seal member 12 is provided with ribs formed on a circular concave portion 13 and both sides of the concave portion 13, and with an opening portion 14 connected to an oil groove 11. In this arrangement, leakage of lubricating oil from axial both ends of the bearing 9 can be prevented to form an effective oil film with a small amount of oil. |
