Ceramic bearing

DETAILED DESCRIPTION Main object of this invention is to provide a ceramic bearing which is possible to support an axis to which thrust load applies and axis to which thrust load and radial load applies simultaneously or selectively.
Another object of this invention is to provide a bearing having a small number of parts by constructing the inner and outer rings with ceramics.
Accordingly, in order to attain these objects, the ceramic bearing of this invention is, characterised in that a ceramic rotary ring wherein an axial hole for engaging an axis is formed at the center thereof and a plane which is approximately right angle with respect to the axial center of the radial hole and a ceramic fixed ring wherein a plane which opposes to the plane formed at said ceramic rotary ring and formed approximately rectangular to said axial center and forming a ring shape projection allowed to correspond its center to said axial center at either one of a plane formed at said ceramic rotary ring or said ceramic fixedf ring, and a ring shape groove correspond to said ring shape projection, said ring shape projection being engaged thereto.
In this invention as described above, the bearing is constructed by together with forming an axial hole for engaging the axis at the center of the ceramic rotary ring (hereinafter referred to as "rotary ring") and forming a plane approximately rectangular to the axial center of the axial hole, forming a plane opposed to the plane formed at said rotary ring at the ceramic fixed ring (hereinafter referred to as "fixed ring") and together with forming a ring shape projection allowed to correspond its center to the axial center thereof at either one of the planes formed at said rotary ring and said fixed ring, forming a ring shape groove corresponds to said ring shape projection at another plane and engaging the projection to said groove.
Therefore, the thrust and the radial loads applied to the axis engaged with the axial hole of the rotary ring can be supported by the bearing through said groove and said projection