Title:
FEEDER FOR MACHINE TOOL
Document Type and Number:
Japanese Patent JPS56167949
Kind Code:
A
Abstract:
PURPOSE:To reduce backlash and a lead error, by tread-rolling the screw shaft of a feeder for a numerical-controlled machine tool and connecting a plurality of signal nuts together through a spring washer. CONSTITUTION:A screw shaft 2 is thread-rolled. A first and a second signal nuts 4, 5 are connected together through a spring washer 13 by bolts 12 so that the signal nusts 4, 5 are always energized towards each other. When the screw shaft 2 is rotated in a direction X, a slide table 17 is moved in the axial direction X' of the shaft 2 through the signal nuts 4, 5 and a ball not shown in the drawing. When lod fluctuation has occurred during the movement of the slide table 17, the spring washer 13 is elastically deformed to absorb the load fluctuation. This results in reducing backlash and maintaining an accurate feed speed. The load fluctuation is thus flexibly coped with.
More Like This:
Inventors:
HASHIMOTO YOSHIO
ITAGAKI AKIRA
ITAGAKI AKIRA
Application Number:
JP6984080A
Publication Date:
December 23, 1981
Filing Date:
May 26, 1980
Export Citation:
Assignee:
NISSAN MOTOR
International Classes:
B23Q5/56; F16H25/22; (IPC1-7): B23Q5/56; F16H25/22