| 摘要 |
PURPOSE:To prevent a leak of fluid, by providing bushes forming a spherical hollow surface and protrusive surface respectively brought into spherical contact with the spherical protrusive surface and hollow surface of an annular body. CONSTITUTION:An annular body 8, forming its outside surfaces 9, 9a respectively into a spherical protrusive surface 10 and a spherical hollow surface 10a further having a hole 11 in the central part, is externally fitted to an eccentric shaft 1 by mounting a sealing O ring 12 to the internal peripheral surface of the body 8. Bushes 13, 13a are loosely fitted to the eccentric shaft 1 by respectively forming clearance parts 27, 27a between the bush and the eccentric shaft 1, and the bush 13, 13a forms its inner side opposite surface 14, 14a respectively into a spherical hollow surface 15 and a spherical protrusive surface 15a brought into spherical contact with the outside surface 9, 9a of the annular body 8. One bush 13 is stopped to a protrusively stepped resilient force of a spring 17, is forced to be brought into contact with the annular body 8 by a suitable pressing force. |
