| 摘要 |
An automatic feed device for a facing head comprising a shank mounted to the main shaft of a machine tool, a body co axial with the shank, a tool holder slidably fitted thereto, and an operating ring rotatably fitted between the shank and the body is disclosed. The automatic feed device comprises a worm shaft disposed at the body, clutches and worm wheels, a gear meshing with a stationary gear of the operating ring, a feed gear engageable with feed pins thereof, an internally threaded worm wheel meshing with the worm wheel, a feed screw engageable with the internally threaded worm wheel, a shifter connected to the clutches, a shifter driving shaft engageable therewith, a shift lever constituting a cam, a forked connecting member connected to the shifter driving shaft, a press lever adapted to press a cam roller against the cam, and a feed direction detecting lever connected to the shift lever. |
