| 摘要 |
A power transmission interconnects a drive body and a driven body by a coupling member, transmits torque of the drive body to the driven body, and interrupts the torque when a drive load of the driven body exceeds a predetermined value. The coupling member has, as separate sections in the coupling member, both of a positive torque transmission section and a negative torque transmission section. The positive torque transmission section holds torque in the forward rotational direction and, when a drive load of the driven body exceeds the predetermined value, interrupts transmission of torque from the drive body by its own fracture. The negative torque transmission section holds torque in the reverse rotational direction. Even if there is a torque fluctuation on the drive body, its influence can be suppressed as little as possible, and interruption of torque can be performed properly at a target interruption torque value. The power transmission can be provided with a simple structure and an excellent assemblability. |
