| 摘要 |
PROBLEM TO BE SOLVED: To provide a spherical bearing easily assembled with excellent durability. SOLUTION: A spherical small ball retainer 42 arranged around a large ball 41 is composed of an upper small ball retaining piece 42a and a lower small ball retaining piece 42b which are composed by dividing a hollow sphere having an opening on at least either of upper/lower parts into the upper/lower parts by a virtual flat surface perpendicular to a vertically-extending shaft passing the center of the sphere. The spherical bearing comprises the large ball 41, the spherical small ball retainer 42, a plurality of small balls 44 rotatably retained by the spherical small ball retainer 42, and a housing 46 having a spherical hollow part 45 having an opening on at least either of the upper/lower parts and storing the spherical small ball retainer together with a plurality of the small balls. The both small ball retaining pieces, made of resin material, are mutually joined by engagement between a projection 58 provided for one retaining piece and a concave part 59 provided for the other retaining piece. COPYRIGHT: (C)2010,JPO&INPIT |
