| 摘要 |
<p>The machining head (7) or the slide (8) carrying it is powered by a drive (9) used to reduce the speed of the head, the parts rollers (10,14) of the drive rotating at the slower speed drivably connected to the walls (3,4) of the cover. These slower walls are linked to each other on both sides of the machining head, using a lever linkage as drive for the belt or chain (15) led over fixed end rollers (10,11). One roller may be joined to a movable wall and one strand (17) of the belt is connected to the slide as against strand which is fixed in place. The ends (18,19) of the chain or belt may be located on the slide and possibly both rollers are joined to a movable cover wall linked via drive parts (12) or crossbar (20). The central cover wall (2) may have a slide and/or head opening (24) and the walls movably joined by the drive have fixed walls (5,6) to both sides.</p> |
