| 摘要 |
PURPOSE:To drive a driving force transmitting member rectilinearly without turning it, and to improve the rise characteristic of output by forming a screw nut while hollowing a shaft and screwing and inserting the driving force transmitting member, to the circumference thereof a male screw is threaded. CONSTITUTION:The shaft 10 of the driving motor 1 is hollowed, a plurality of balls 10a are buried spirally into the shaft and the ball screw nut is formed. The male screw 2b is shaped previously to the outer circumference of the driving force transmitting member 2, and the male screw is screwed and inserted to the ball screw nut of the shaft 10. A rotor 14 is turned under a condition that the casing 13 of the driving motor 1 is fixed, and the driving force transmitting member 2 is driven rectilinearly without being rotated. Accordingly, starting characteristics can be improved because inertial load at the time of the starting of the driving motor 1 is reduced. |
