| 摘要 |
PURPOSE: To simplify the structure by forming one of shoulders on one of smooth surfaces and providing an introduction lubricant orifice of the axial direction opened to the smooth surface in order to supply the lubricant to a distribution passage communicating with the peripheal edge of a journal. CONSTITUTION: Two arms 12, 14 are provided in the inside of a door. The first arm 12 is used as a driven arm constituted of half arms 16, 18. The second arm 14 is used as a driving arm. A planar lateral surface 24 is stuck out and extended into a cylindrical opening 20 and it is constituted in one side of the cylindrical journal part of the rotary bearing. An axial orifice 34 for introduction of lubricant and a protection agent is provided at the cylindrical shoulder 22 of the half arm 18 and extended from the planar surface 36 to the planar surface 30 of the cylindrical shoulder 22. The orifice 34 is opened onto the surface 30 to supply the lubricant to two distribution passages 38, 40. In this way, the bearing can be guaranteed to be protected for a long period of time. |
