| 摘要 |
PURPOSE:To accurately detect the rotating speed of a rotary electric machine by rockably supporting a tachometer generator by a spring integral with a pinion to respond to the fluctuation of the axial center of a large gear of a rotor of the machine. CONSTITUTION:A rotor 8 of a rotary electric machine overhung by a rotational shaft 3 of a drum is deflected by its own weight, and the deflection amount is always varied by the variation in the load point of a rope 1. A pinion 10 is rotated at a pivot 9 as a center, and responds to the variation in a large gear 9. The contacting pressure of the pinion 10 for the gear 9 is held at a suitable value by adequately regulating the tensions of springs 22, 22 by a nut 23. Thus, a tachometer generator 12 responds to the fluctuation of the axial center of the large gear provided at th rotor of a rotary electric machine 7, thereby accurately detecting the rotating speed. |
