| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing structure capable of suppressing the noise and vibration occurring when a rolling element passes on a mating surface of split outer ring halves. SOLUTION: A large end of a connecting rod is split into a first housing portion and a second housing portion having a depressed portion having substantially semicircular cross section to form a supporting hole having substantially semicircular cross section for supporting a crankshaft by a pair of the depressed portions. A rolling bearing 2 has a pair of split outer ring halves 3a and 3b disposed in close contact with each other within the supporting hole, a plurality of rolling elements 4 (needle rollers), which are disposed so as to be capable of rolling on the inner surface of both the split outer ring halves, and a pair of split cage halves for holding the respective rolling elements 4 so as to dispose them at a substantially equal intervals in the circumferential direction. With respect to a stepped portion h formed on the mating surface C of the circumferential end surface of each split outer ring halves 3a, 3b, a corner 30 at an edge part on the inner diameter side is machined into round faces Ra, Rb to reduce shock when the rolling element 4 passes on the mating surface C. COPYRIGHT: (C)2009,JPO&INPIT
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