Rolling guide unit
AssigneeNippon Thompson Co., Ltd.
InventorTomohiro Ichida
Life of this patent
Estimating the term…
Abstract
In this rolling guide unit, a slide is placed on a track rail so that the slider can be moved slidingly in a linear direction, and a shaft portion is provided on the upper surface of and integrally with the casing of the slider, and has an annular raceway surface on the circumferential side thereof, lower and upper rotary bodies being fitted firmly and rotatably around the shaft portion. The casing constitutes a common part having a function of making a linear movement and a function of making a rotational movement, and this enables the height of the rolling guide unit to be reduced to as great an extent as possible, and an accumulated error due to an assembling operation to be minimized, whereby a highly accurate guide machine can be provided.
Claims5
A rolling guide unit comprising:
- a track rail provided with first raceway grooves in the longitudinally extending both side surfaces thereof,
- a slider saddled on said track rail, capable of being linearly moved, and consisting of a casing having second raceway grooves in the portions thereof which are opposed to said first raceway grooves, end caps fixed to both of longitudinal end portions of said casing, and first rolling elements circulatingly rollable between said opposed first and second raceway grooves,
- a cross-sectionally circular shaft portion formed integrally with said casing so as to project from the upper surface thereof and provided on the circumferential side thereof with an inner upper raceway surface and an inner lower raceway surface adjacent to said inner upper raceway surface,
- a lower rotary body fitted rotatably around said cross-sectionally circular shaft portion and provided with an outer lower raceway surface opposed with respect to the circumference thereof to said inner lower raceway surface,
- an upper rotary body placed fixedly on said lower rotary body, fitted rotatably around said cross-sectionally circular shaft portion and provided with an outer upper raceway surface opposed with respect to the circumference thereof to said inner upper raceway surface, and
- second rolling elements adapted to roll between said inner upper and lower raceway surfaces and said outer lower and upper raceway surfaces.
Dependencies are inferred from the claim text.