| 摘要 |
PROBLEM TO BE SOLVED: To facilitate maintenance and control, to enhance the control accuracy of a speed, a position or the like and to easily control a motor. SOLUTION: An injection device has a metering motor 44, the injection motor 45 arranged on the same axis as the metering motor 44, the hollow rotor shaft fixed to the rotor 49 of the injection motor 45, the screw allowed to advance and retreat accompanied by the driving of the injection motor 45 and rotated accompanied by the driving of the motor 44, the ball screw shaft 65 integrally connected to the rotor shaft and the encoder detecting the rotation of the ball screw shaft 65. In this case, since it is unnecessary to use a timing belt in order to allow the screw to advance and retreat or to rotate the same, maintenance and control become easy and the control accuracy of a speed, a position or the like can be enhanced. |
