| 摘要 |
<p>A device in a machine tool for maintaining a workpiece which is being worked during displacement in the longitudinal direction, in engagement with the tool. The device consists of a first pair of rigidly interconnected arms which, at one end, are pivotally connected to first ends of a second pair of rigidly interconnected arms and, at the other end, are pivotally mounted on the machine frame. The other ends of the arms of the second pair are pivotally mounted on a pressure plate, all pivot shafts of the arms extending parallel to the direction of movement of the workpiece. Above the arm arrangement, a shaft extending in parallel with the working plane of the machine and perpendicularly to the direction of movement of the workpiece is vertically adjustably fixed on the machine frame. A piston and cylinder assembly is adjustably mounted on said shaft. The piston rod of the piston and cylinder assembly is connected to the pressure plate by means of a pivot shaft perpendicular to the direction of movement of the workpiece, and a bearing element pivotable transversely of the direction of movement of the workpiece.</p> |
