Plastic fuel tank cover of engineering vehicle

Abstract

The invention relates to a plastic fuel tank cover of an engineering vehicle. The plastic fuel tank cover comprises a fuel tank oil filling port, a pressure-bearing plate, a pressure spring, an air inlet valve assembly, a plastic locking rod, a plastic housing and a handle pull rod. The plastic locking rod and the plastic housing are in interference fit with each other and sealed through an O-shaped rubber ring. The air inlet valve assembly comprises an air inlet valve, a cover-shaped gasket, a negative pressure spring and a rubber gasket. A valve rod of the air inlet valve penetrates through an air inlet valve installation hole of the pressure bearing plate. The cover-shaped gasket is arranged on the valve rod of the air inlet valve. The negative pressure spring is installed between the cover-shaped gasket and the pressure bearing plate. The rubber gasket is fixed to a bottom face circular plate of the air inlet valve. When the air pressure inside the oil tank and the external air pressure are balanced, the rubber gasket and the pressure bearing plate are attached and sealed, and the oil filling port of the fuel tank and the pressure bearing plate are attached and sealed. The plastic fuel tank cover solves the key common problems that due to the fact that in the work process of an existing engineering vehicle, rainwater enters the fuel tank, the fuel tank rusts and is corroded, vent holes of the air inlet valve are prone to blockage, an engine is blocked, and automatic flameout is caused or starting can not be achieved.

Description

technical field [0001] The invention relates to a fuel tank cover structure for a vehicle, in particular to a plastic fuel tank cover for an engineering vehicle. Background technique [0002] Aluminum and iron fuel tank caps, the central shaft handle lever controls the opening or closing of the fuel tank. During the opening or closing process, the handle lever runs and rotates up and down in the hole in the rubber gasket, and radial sealing cannot be achieved (if the rubber gasket is placed The hole and the handle rod are tightly sealed, and the friction force increases, the handle rod will be stuck, and the fuel tank cap is difficult to open or close). The fuel tank cap is an exposed part on the construction vehicle. When it rains or the vehicle is cleaned, the rainwater will easily flow into the fuel tank from the handle bar, causing serious rust and corrosion inside the fuel tank, and deterioration of the fuel, which will affect the power of the vehicle engine, and even t...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to provide an air intake valve that prevents rainwater from entering the fuel tank, and prevents rainwater and impurities from entering the fuel tank during user use, so as to achieve the purpose of preventing rust and blocking of the vent holes.

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