PURPOSE: To provide an actuator for a valve capable of driving a valve into stepless and adjusting the valve into the suitable position in the disconnection of a motor coil.
CONSTITUTION: A sleeve 105 as a rotary shaft of a motor 110 is rotatably provided so as to be freely moved in the shaft center direction, and an internal threaded hole 105a is formed inside the sleeve 105, and a shaft 106 is screwed into the internal threaded hole 105a so as to be moved into the shaft center CR direction, and a stopper-like valve 104 is formed on the end of the shaft 106 projecting from the opening end of the internal threaded hole 105a. Moreover, an opening/closing surface 104a is provided on the valve 104 in the shaft center CT direction, and a structure for stopping the rotation of the shaft 106 is provided between the shaft 106 and a case 111 of a motor 110, and a second helical spring 9 is provided for energizing the shaft 106 in the closing direction of the valve 104 in the shaft center CT direction.
KOMAZAKI MASAHITO
OKAWA TAKANORI
