| 摘要 |
PROBLEM TO BE SOLVED: To improve the lubricity of roller bearings for guiding rolling of a timing chain.SOLUTION: A plurality of shaft engaging parts 25 are provided in a circular-arc arrangement on a pair of opposite side plate parts 22 of a guide base 21 disposed to face one side of a timing chain 5 for torque transmission so that a shaft end of a roller shaft 31 is supported by each of the shaft engaging parts 25. A plurality of roller bearings 41 for guiding a chain are rotatably supported by each roller shaft 31. An oil induction hole 26 passing through an outside surface of the side plate part is provided on a wall surface of each of the shaft engaging parts 25 to which a shaft end face of each roller shaft 31 is opposite, and a scattered oil scooped upward by movement of the timing chain 5 to adhere to an outer surface of each of the side plate parts 22 is brought from an oil induction hole 26 into each roller bearing 41 to improve the lubricity of each roller bearing 41. |
