| 摘要 |
PURPOSE:To detect a rotational quantity over a wide range by connecting a driven shaft to a main shaft through a planetary differential speed reducer and providing absolute rotational quantity detection parts to the main shaft and drive shaft respectively, and thus obtaining a large speed reduction rate. CONSTITUTION:The main shaft 2, planetary differential speed reducer 3, driven shaft 4, etc., are put and arranged in a cylindrical case 1. The absolute rotational quantity detection parts 5 and 6 are provided to the main shaft 2 and driven shaft 4 respectively. The main shaft 2 is supported by a bearing 8 provided to a front plate 7. Then when the main shaft 2 is rotated, its rotational quantity is transmitted to the speed reducer 3 and an operating shaft 18 and a cylindrical body 25 rotate in one body to rotate an eccentric cylinder 22 eccentrically. This eccentric rotation is transmitted through the gear system composed of external gears 27 and 28 and internal gears 29 and 30 through the cylindrical body 25 and a visco-elastic material 26 the this gear system enters specific speed reducing operating to outputs a rotational quantity based upon the speed reduction ratio from the drive shaft 4. Consequently, the rotational quantity is detected over a wide range. |
