| 摘要 |
<p>A machining tool comprises a frame mounting an extendable yoke slidable with respect to the frame in a first direction through two mounting pillars. A tool motor is mounted on the yoke. A drive mechanism for the yoke is also mounted in the frame, with a drive motor to drive the yoke drive mechanism. A belt is between pulleys on the drive motor and mechanism to transmit drive between them. A rotatable sleeve is around the tool motor and on which sleeve the belt engages on opposite sides of the tool motor, whereby the tool motor can extend between the drive motor and mechanism, thereby resulting in a compact arrangement of the tool. A chassis plate is connected to the frame beyond the yoke and through which the tool bit protrudes. A foot plate has attachment means for attaching the tool to a workpiece. Locking means lock the chassis and foot plates together in selectable position of one with respect to the other, whereby the tool can be fixed with respect to the workpiece for reaction against the workpiece during machining of the workpiece by the tool. A mounting structure comprises an annular plate having an aperture and a foot plate fixed and a base plate received between them to define an annular chamber in which a rheological fluid is disposed. The base plate is connectible to a first device, eg the frame of the machining tool, through the aperture of the annular plate. The foot plate is connectible to a second device eg a workpiece. Activation of the rheological fluid to render it solid serves to lock the devices with respect to one another. Deactivation serves to permit the position of the devices to be adjusted by sliding the base plate between the annular and foot plates.</p> |
