| 摘要 |
The present invention is intended to provide a bearing structure in which a reference side bearing portion and an aligning side bearing portion can be installed with axial centers nearly aligned to each other even when the axial center of rotary shaft is inclined, and it is possible to obtain smooth and stable rotation for a long consecutive period of time. Left cup 7 of the bearing structure is axially moved so that ball 9 a . . . held on holding ring 9 b of aligning side bearing portion 9 is abutted on left-hand flange 4 a of crank shaft 4 , and also, holding ring 9 b is spherically adjusted along the spherical surface of left cup 7 , and the bearing center of all ball 9 a . . . held on holding ring 9 b is automatically aligned so as to be nearly aligned to the axial canter of crank shaft 4 which bears on reference side bearing portion 8 , thereby displaying a bearing function while assuring smooth and stable rotation.
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