| 摘要 |
PURPOSE:To indicate accurately rolling reduction and to prevent troubles by connecting the driving system of an upward rolling-reduction device to a vertical input axis in the slantly upward direction through a transmission axis and incorporating a differential planetary-gear device in the input axis. CONSTITUTION:A worm gear axis is connected to the driving source of an upward rolling-reduction device through a universal coupling and bevel gears, etc. A transmission axis 19 is provided from its end in the slantly upward direction through a universal coupling 18. The actuating part of an indication device is protected from scales, etc. by covering the axis 19 and its vicinities with a casing 22 fixed to the frame of a mill. A differential planetary-gear device is provided, through a universal coupling 20 connected to the axis 19, to connect its sun-gear axis to the axis 19. A scale 38 for rolling reduction is provided to the outer circumference of a free internal gear rotating at the reduced speed under a large reduction gear ratio, and a needle 39 of scale is arranged on the casing. By this mechanism, the indication of optional rolling reduction is accurately performed by the large reduction gear ratio, and troubles caused by scale sticking, etc. are also prevented. |
