Motor-operated valve

摘要

To provide a small motor-operated valve which can control a high flow, there is provided a motor-operated valve of which a body has an orifice, seat and a valve element provided opposite to the seat. The valve element is operated by a driver which is driven to rotate by an output gear to which the rotation of a rotor having been reduced by means of a mechanical paradox planetary gear mechanism is transmitted. To force the valve element in the direction in which the valve is opened, a coil spring is disposed in a bore formed in the upper portion of the body oppositely to a bush.

主权项

1. A motor-operated valve comprising:
a body having a seat formed therein; a bush fixed to the body and having an internal thread formed inside; a driver having an external thread which is in mesh with the internal thread of the bush; a valve element arranged to abut on or come close to the seat when pressed by the driver; a can firmly fixed to the body; a rotor disposed pivotably inside the can and of which the rotation is transmitted to the valve element via the driver; a stator disposed on the outer circumference of the can; and a coil spring means for forcing the valve element toward the rotor, at least a part of the coil spring means being disposed so as to surround an outer circumference or outer periphery of the bush; and a spring case disposed in contact with the outer circumference or outer periphery of a small-diameter portion of the bush.