摘要 |
In a bearing device 1, annular recesses 3a and 6a that house a thrust bearing 7 are formed in side surfaces of a housing 3 and a cap 6, a rotation preventing protrusion 12b is provided in an outer periphery of a lower side half-split thrust bearing 12 in the thrust bearing 7, and a rotation preventing groove 6b into which the rotation preventing protrusion 12b fits is formed in the annular recess 6a formed in the cap 6. The rotation preventing groove 6b is formed to be deeper than the annular recess 6a, and in a surface of the lower side half-split thrust bearing 12 on the side of the crank arm, a groove 12c is formed from the rotation preventing protrusion 12b to an inner peripheral portion of the lower side half-split thrust bearing 12. This can prevent partial contact of the thrust bearing, and prevent breakage due to stress concentration as much as possible.
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