| 摘要 |
A chucking device for a machine tool, especially a turning machine, in which a chuck body has radial recesses in which jaws are slidable while the actuating bars in the chuck body engage teeth on the jaws to move the jaws in and out as the bars reciprocate. A gear coaxial with the chuck body is tangential to the bars and meshes with teeth thereon, while a rotary motor in the chuck body is adjacent to and is directly connected with said gear. |
