VALVE ASSEMBLY

摘要

The present invention relates to a valve assembly and, more particularly, to a valve assembly which has a simple configuration to return a valve from an open or closed position to an initially-set position when the supply of electric power to a drive motor which controls the open ratio of the valve is shut off.

主权项

1. A valve assembly which controls an open ratio of a throttle valve using a drive motor operated by an engine control unit depending on an open ratio of an accelerator pedal, the valve assembly comprising:
a throttle body which has defined therein an intake port which penetrates through the throttle body from a front end to a rear end; a shaft disposed in the throttle body, the shaft penetrating through the throttle body from one side surface to the opposite side surface; bearings disposed on each of end portions of the shaft; a plate disposed on a central portion of the shaft to open or close the intake port in response to a rotation of the shaft; a segment gear disposed on one side of the throttle body and coupled to one end portion of the shaft; an intermediate gear which transmits driving force of a drive motor provided on the throttle body to the segment gear; a cover which closes the intermediate gear from the outside; and a returning means including a pair of elastic members which are provided on the segment gear, wherein, when the driving force from the drive motor that has been acting on the intermediate gear is shut off, the segment gear is rotated by a different one of the pair of elastic members according to whether the plate is deployed to an open or closed position, thereby returning the plate to an initially-set position.