| 摘要 |
PURPOSE:To reduce pressure losses due to pipe lines and to enhance the freedom of arrangement of pipe lines in a rotary type working machine, by doubly laying a plurality of working fluid passages on a rotary shaft to feed working fluid. CONSTITUTION:A passage 4 is communicated with an oil sump 7, piercing through a passage 5, and is secured to a machine body so that the passage 4 may feed cutting oil without being rotated. Meanwhile, the oil passage 5 is secured to a rotary table 11 in the working machine, being sealed off from the passage 4 by means of the O-ring 12, and is therefore rotated by means of a rotary joint 3 in synchronization with the rotary table 11 so that compressed air is fed from a valve 10 through an air sump 6. With this arrangement in which passages for two different kinds of fluids are doubly arranged on one and the same rotary shaft, the arrangement of pipe lines may be simplified and pressure losses due to pipe lines may be reduced. Further, it is possible to enhance the freedom of pipe lines to aim at making the working machine compact as a whole. |
