| 摘要 |
PROBLEM TO BE SOLVED: To improve the performance of a pulley unit by eliminating the environment easy to generate the deterioration of the lubricating agent while securing a space for holding the lubricating agent in the pulley unit. SOLUTION: This pulley unit includes a pulley 1, a rotor shaft 2 arranged around the same axis with the pulley 1 inside of the pulley so as to be freely rotated in relation to the pulley, a one-way clutch 3 interposed in an annular space between the pulley and the rotor shaft, and rolling bearings 4 and 5 provided in both sides of the one-way clutch in the annular space. At least a part of an outer diameter side of each rolling body holders 24 and 34 provided in the rolling bearings have reduced diameter parts 24a and 34a for enlarging the storage volume of the lubricating agent inside of the annular space. The inner diameter surface of the pulley is provided with a recessed part 1a for enlarging the storage volume of the lubricating agent inside of the annular space, and a space for holding the lubricating agent is thereby secured so as to eliminate the environment easy to generate the deterioration of the lubricating agent. |
