| 摘要 |
A power transmission device includes a pulley (4) and a hub (11) that are arranged on the same rotation axis, and a connecting member (13) that connects these rotation bodies. The power transmission device includes a first connecting structure (14) that connects one end portion (13a) of the connecting member to the pulley so that one end portion (13a) cannot be separated, and a second connecting structure (15) that connects the other end portion (13b) of the connecting member to the hub so that the other end portion (13b) can be separated. The second connecting structure includes a columnar body (21) that extends through the other end portion (13b) of the connecting member (13) in the axial direction, a head portion (28) that is provided on the columnar body (21), a slit (22) of the connecting member (13), and a belleville spring (29) that presses the connecting member (13) against the rotation body. The other end portion (13b) of the connecting member (13) is formed to be larger than the remaining portion of the connecting member (13) when viewed from the axial direction. A recessed portion (16) that is recessed toward the outer peripheral side of the hub (11) is formed at a portion of the other end portion (13b) that is directed to the shaft center side of the hub (11). The power transmission device capable of setting with high accuracy the operation load of a torque limiter that cuts off power transmission can be provided. |
