| 主权项 |
1. A tank opening-closing device for opening and closing a fueling inlet for supplying fuel to a fuel tank, comprising:
a tank opening forming member having the fueling inlet, and a fuel path configured to receive a fuel gun and supply the fuel supplied from a fueling gun to the fuel tank through the fueling inlet, a valve opening-closing mechanism including a valve body, a valve support moving body, and a spring biasing the valve body toward the closed position of the fueling inlet, the valve body being configured to open and close the fueling inlet and to regulate an internal pressure of the fuel tank, the valve support moving body including a side wall and a bottom wall formed on a bottom part of the side wall, the side wall and the bottom wall of the valve support moving body forming a cup-shaped valve housing chamber, the cup-shaped valve housing chamber housing the valve body, the valve body moving upwardly and downwardly within the cup-shaped valve housing chamber between a venting position providing a ventilation path in the fueling inlet and the closed position of the fueling inlet, and the spring of the valve opening-closing mechanism being supported on the bottom wall of the cup-shaped valve housing chamber of the valve support moving body, a biasing force of the spring pushing upwardly against the valve body and forcing the valve body in a direction closing the fueling inlet, a gasket interposed between the valve body and an opening peripheral edge part of the fueling inlet and pressing against the opening peripheral edge part of the fueling inlet and the valve body, and a retraction mechanism connected to the valve-opening closing mechanism and pivoting the valve-opening closing mechanism about a horizontal axis relative to an axis of the fueling inlet, the retraction mechanism working in conjunction with the fueling gun or an external force to pivot the valve-opening closing mechanism about the horizontal axis and between the fueling position and the closed position, wherein in the closed position, the valve body moves toward the venting position when atmospheric pressure exceeds the internal pressure of the fuel tank and the biasing force of the spring and provides the ventilation path in the fueling inlet for regulating internal pressure of the fuel tank, and in the fueling position, the valve body pivots away from the fueling inlet and enables fuel supply. |
