Patent ID: 8776845
Filing Date: 2014-07-15
Classification: B60K

Abstract:
1. A fuel tank opening and closing device for opening and closing a path for supplying fuel to a fuel Link, the fuel tank opening and dosing device comprising: a tank opening forming member for forming an insertion path for inserting a fueling nozzle and a fuel path which has an inlet connected to the insertion path and is connected to the fuel tank, the tank opening forming member including a connecting tube which forms the fuel path, an inlet forming member including the inlet and mounted inside the connecting tube, and a fitting member attached to the inlet forming member, and a flap valve mechanism arranged inside the tank opening forming member, the flap valve mechanism having an opening and closing member for opening and closing the inlet by being pressed by an end of the fueling nozzle, a shaft provided at an end of the opening and closing member, and a bearing mechanism provided on the fitting member of the tank opening forming member, the bearing mechanism having a shaft support recess receiving and rotatablv supporting the shaft, wherein: a plurality of shaft restriction projections project from a wall surface of the shaft support recess, each of the shaft restriction projections has a shaft support surface shaped as arc surface in a cross section and each shaft support surface being configured to contact a part of an outer periphery of the shaft, the shaft restriction projections including a bottom arc portion that is formed on a bottom of the shaft support recess and a side arc portion that is formed close to the bottom arc portion in a circumferential direction of the shaft across a groove, the shaft support recess includes an opening that opens in an opposite direction to an insertion direction of the fueling nozzle, the inlet forming member includes a restraining member arranged within the opening of the shaft support recess, the restraining member retaining the shaft, the shaft restriction projections include an opening projection that restricts a width of the opening of the shaft support recess to a width more narrow than a diameter of the shaft, and the opening projection elastically deforms and holds the shaft at a position touching the shaft restriction projections when the shaft is inserted in the shaft support recess for preventing the shaft from slipping off the shaft support recess.