Device for automatically adjusting gap between lead screw nut and movable crossbeam of planer type milling and boring machine

Abstract

The invention relates to a device for automatically adjusting a gap between a lead screw nut and a movable crossbeam of a planer type milling and boring machine. The device comprises a motor (1), a double-output-shaft worm gear and worm speed reducer (2), four couplers (3), a right output-shaft worm gear and worm speed reducer (4), a right lead screw (7), a right nut (8), a left lead screw (10), a left nut (11), a left output-shaft worm gear and worm speed reducer (13) and an electric control box (6), wherein the electric control box (6) is connected with the motor (1) through a wire (5); and a PLC (programmable logic controller) is arranged in the electric control box (6). By using the device, the gap between the movable crossbeam and the lead screw nut can be automatically adjusted; and the device runs stably, is high in precision, convenient to operate and long in service life, and is safe and reliable.

Description

Technical field: [0001] The invention relates to an automatic gap adjustment device for screw nuts, in particular to an automatic gap adjustment device for a moving beam screw nut used in a gantry milling and boring machine. Background technique: [0002] The lifting operation of the moving beam of the existing gantry milling and boring machine is completed by a set of screw nut transmission devices on the left and right. The upper tooth surface of the trapezoidal tooth of the nut on the top is used to realize the lowering of the moving beam. At this time, there is a gap between the upper tooth surface of the trapezoidal tooth of the lead screw and the lower tooth surface of the trapezoidal tooth of the nut installed on the moving beam. Under the action of the self-weight of the moving beam, the moving beam will sink, and the sinking distance of the left and right ends of the moving beam may be inconsistent, so that, on the one hand, it will affect the processing quality of ...

AI Technical Summary

Problems solved by technology

[0002] The lifting operation of the moving beam of the existing gantry milling and boring machine is completed by a set of screw nut transmission devices on the left and right. The upper tooth surface of the trapezoidal tooth of the nut on the top is used to realize the lowering of the moving beam. At this time, there is a gap between the upper tooth surface of the trapezoidal tooth of the lead screw and the lower tooth surface of the trapezoidal tooth of the nut installed on the moving beam. Under the action of the self-weight of the moving beam, the moving beam will sink, and the sinking distance of the left and right ends of the moving beam may be inconsistent, so that, on the one hand, it will affect the processing quality of the product; During the next lifting operation, due to the inconsistency of the sinking distance between the left and right ends of the moving beam, the transmission will not be stable, and even the machine tool will be damaged.

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