| 摘要 |
PURPOSE:To prevent abnormal wear and seizure from being produced by forming an oil groove in non-commuication with an oil outlet hole as well as in communication with an oil inlet hole over approximately the whole circumference of the internal circumferential surface of a cylindrical sleeve-shaped bush body. CONSTITUTION:Upon supporting a cam shaft on a cylinder block, this bush member 30 inserted between the cam shaft and a cylinder block is provided with a cylindrical sleeve-shaped bush body 32 having an oil inlet hole 34 and an oil outlet hole 36. The bush body 32 is further provided with an oil groove 38 in communication with the oil inlet hole 34 on the internal circumferential surface thereof. The oil groove 38 is constructed with the first part 40a extending from one side of the inlet hole 34 to one side of the outlet hole 36 and the second part 40b extending from the opposite side of the inlet hole 34 to the opposite side of the outlet hole 36. And, this bush member 30 is formed in a cylindrical sleeve-shape, by fitting convex parts 42 in concave part 42, both of which are formed on both ends of the bush body 32 respectively in developed state thereof. |
