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    • 14. 发明公开
    • BEARING STRUCTURE FOR CRANKSHAFT
    • LAGERSTRUKTURFÜRKURBELWELLE
    • EP2119899A1
    • 2009-11-18
    • EP08721427.6
    • 2008-03-06
    • Toyota Jidosha Kabushiki Kaisha
    • NAKAMURE, Kenji
    • F02F7/00
    • F02F7/0053
    • A bearing structure of a crankshaft is disclosed. The crankshaft is rotatably held by a lower cylinder block portion and a bearing cap arranged below the lower cylinder block portion. Stress relaxation grooves extending along the axis of the crankshaft are formed in upper portions of opposite sides of the bearing cap. The stress relaxation grooves have openings in opposite side surfaces of the bearing cap. By forming the stress relaxation grooves, projecting ends extending along the axis of the crankshaft are formed in the upper portions at the opposite sides of the bearing cap. The projecting ends are flexible in response to load acting on the bearing cap when the crankshaft rotates.
    • 公开了一种曲轴的轴承结构。 曲轴由下缸体部分和布置在下气缸体部分下方的轴承盖可旋转地保持。 在轴承盖的相对侧的上部形成有沿着曲轴的轴线延伸的应力松弛槽。 应力松弛槽在轴承盖的相对侧面具有开口。 通过形成应力松弛槽,在轴承盖的相对侧的上部形成有沿着曲轴的轴线延伸的突出端。 当曲轴旋转时,突出端部响应于作用在轴承盖上的负载而是柔性的。