| 摘要 |
A torque reduction unit having small bevel gears is described, particularly for use in the operation of rolling shutters or blinds. Due to its reduced dimensions the reduction unit is located within the operating pulley for the winding up cylinder or drum, and comprises two crown gears which are respectively integral one with the rotable pulley and the other with the stationary or fixed box, crown gears externally of a central hub carrying three or more radial pins uniformly arranged and integral with said hub, the pins having as many bevel pinions rotably carried thereon, the teeth of the pinions meshing with the teeth of the crown gears. |
