| 摘要 |
PROBLEM TO BE SOLVED: To provide an easy-to-assemble spherical bearing capable of smoothly and accurately rotating or tilting a rod. SOLUTION: The spherical bearing includes a large ball provided with the rod in at least one of an upper part or a lower part, a housing having a hollow part defined by a spherical recessed wall housing the large ball via a gap and an opening face formed in at least one of the upper part or the lower part, a cylindrical small ball holder arranged in the gap, provided with a plurality of through holes on a circumferential wall, and having an outer diameter smaller than a diameter an opening face of the housing and an inner diameter larger than a diameter of the large ball, and a plurality of small balls each housed in the through holes of the small ball holder, and rotatably arranged in the gap in a state contacting a large ball surface and the spherical recessed wall. COPYRIGHT: (C)2008,JPO&INPIT
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