Device for adjusting the cross-rail on portal type machine tools |
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| 申请号 | US3704649D | 申请日 | 1971-01-27 | 公开(公告)号 | US3704649A | 公开(公告)日 | 1972-12-05 |
| 申请人 | WERKZEUG MAS FAB ADOLF WALDRIC; | 发明人 | HOFF TONI VON DEN; WEBER EWALD; | ||||
| 摘要 | A device for adjusting the cross-rail on a portal type machine tool wherein an adjusting device is provided between an abutment member and a nut and which is movable transversely of the spindle axis by means of an adjusting motor and is provided with a slot extending in its direction of movement for the passage of the elevating screw. It is through this structure that one end of the cross-rail may be vertically adjustable independently of the other end of the cross-rail to maintain same in a generally horizontal relationship parallel to, for example, the plane of the worktable. | ||||||
| 权利要求 | 1. A device for adjusting the cross-rail on portal type machine tools, having an elevating screw engaging a nut in the region of each end of the rail, an abutment at each rail end for supporting the nut and an adjusting device, whereby one end of the rail is additionally vertically adjustable as a function of the deviation of the rail from the desired horizontal position, independently of the other end of the rail, wherein the adjusting device comprises a wedge (13, 22) located between the abutment (11, 29) and the nut (12, 27) and is movable transversely of the spindle axis by means of an adjusting motor (10) and provided with a slot (14, 31), extending in its direction of movement (A) for the passage of the elevating screw (5, 25). 2. Device according to claim 1, wherein the wedge is supported on both sides by means of rolling elements on the parts co-operating with it. 3. Device according to claim 1, wherein the nut (12) is displaceable in the axial direction in a sleeve (11) directed to the cross-rail (1) and serves as the abutment, and on the lower end (11a) of the nut projecting beyond the sleeve (11) is a flange (15), the wedge (13) being arranged between the flange (15) and the lower end (11a). 4. Device according to claim 3, wherein the upper end of the nut (12) projects beyond the sleeve (11) and is there non-rotatably connected by means of wedge teeth (22) to a ring (23) fixed to the sleeve. 5. Device according to claim 1, wherein the drive of the wedge (13) is effected by a screwthreaded spindle (20), which is driven by a gearwheel motor (10) and engages a female screwthread provided in the wedge (13). 6. Device according to claim 1 having a stationary screw and a rotatable nut supported on the abutment by means of an axial bearing, wherein the wedge (32) is arranged between the axial bearing (30) and the abutment (29). |
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