| 摘要 |
A chain guide is provided which reduces moving resistance of a camshaft-driving, torque-transmitting timing chain. The chain guide includes a guide base (21) provided on one side of the timing chain (5) to face the timing chain and having an opposed pair of side plates (22). The side plates support the respective ends of roller shafts (31) each rotatably supporting a chain-guiding needle roller bearing (41). Each needle roller bearing includes a retainer (43) guided by the needle roller elements (45). With this arrangement, the outer races (42) of the bearings, which guide the movement of the timing chain (5) while kept in rolling contact with the timing chain, encounter less rotational resistance. This in turn reduces moving resistance of the timing chain (5) and thus fuel consumption. |
