| 摘要 |
<p>The invention relates to a rotating hydraulic cylinder jack fixed at the rear of a machine-tool spindle for the controlling of a clamping device. The jack cylinder (26) is formed from a body (30), the outer lateral surface (31) of which bears means constituting the rim of a pulley driving the spindle in rotation. These means can consist of the surface of the body itself, or of a sleeve surrounding the body. The device (28) for distributing the control fluid to the cylinder advantageously constitutes a bearing in which rotates a tubular part (37) extending the cover (36) forming, together with a hollow cylindrical piece, the body of the cylinder jack, and the distribution device is held by a support (47) fixed to the frame (48) of the machine. <IMAGE></p> |
