| 摘要 |
PROBLEM TO BE SOLVED: To provide a swivel joint in which the number of inside oil paths formed in a spindle can be increased without incurring an increase in spindle diameter. SOLUTION: The swivel joint includes a body 5 which is held by a traveling body 1 and has a first connecting port 7, and a spindle 6 which is inserted rotatably into the body 5 to be held by a rotating body 2 and has a second connecting port 8. Further, the swivel joint is formed, in the spindle 6 and the body 5, with a plurality of inner oil paths 9 which is opened in an upper surface 6a of the spindle 6 and communicates with the first and second connecting ports 7, 8. Each of oil-tight members for preventing the oil guided to these inner oil paths 9 from leaking includes a plug 11, an O-ring 12, and a plug 13 the whole of which are inserted into the inner oil path 9 and, and furthermore includes a plate 10 for covering the upper surface of the spindle 6 to restrain the plug 11, the O-ring 12, and the plug 13 from jumping out of the spindle 6, and bolts 14, 17 for fixing the plate 10 to the spindle 6. COPYRIGHT: (C)2011,JPO&INPIT |
