Patent ID: 7086937
Filing Date: 2006-08-08
Classification: B24B

Abstract:
1. A wheel shaft supporting apparatus for a grinding machine comprising: a grinding wheel; a pair of wheel shafts combined and un-combined with each other by relatively moving thereof in an axial direction and supporting said grinding wheel nearby a combining area; a pair of radial bearing devices mounted on a wheel slide and supporting respectively said pair of wheel shafts rotatably; a thrust bearing device mounted at one of said radial bearing devices and supporting one of said wheel shafts in a thrust direction; a shaft coupling mechanism mounted in said wheel shafts for selectively combining and un-combining opposite ends of said wheel shafts; a taper cylindrical portion formed on and projected from an end surface of one of said wheel shafts; a taper inside opening formed on an end portion of the other wheel shaft and fitting tightly with said taper cylindrical portion as a taper surface fitting by said shaft coupling mechanism; a vertical end surface formed on said one wheel shaft and extending from a base of said taper cylindrical portion; and another vertical end surface formed on said end portion of said other wheel shaft and fitting tightly with said vertical end surface of said one wheel shaft as vertical surface fitting, wherein the grinding wheel is supported by said taper surface fitting and said vertical surface fitting continuous with said taper surface fitting.