Inclination and leakage prevention oil tank cover

Abstract

An inclination and leakage prevention oil tank cover disclosed in the invention is characterized in that the oil tank cover comprises an outer cover, a dustproof cover and a membrane, internal threads connected with an oil tank opening are arranged on the inner wall of the outer cover, an annular sealing gasket tightly attached to the internal threads is arranged on the top face of the inner side of the outer cover, a plurality of vent holes are distributed in the inner top face of the outer cover, the membrane is fixed on the inner top surface of the outer cover through a membrane fixing seat, the membrane shields the lower part of the plurality of vent holes, an annular cavity is formed between the inner top surface of the outer cover and the membrane, the annular cavity is communicated with the vent holes, the outer top surface of the outer cover is provided with a concave cavities communicated with the vent holes, the dustproof cover covers the concave cavity, and the edge of the concave cavity is provided with an air inlet channel which is tightly attached to the inner side wall of the outer cover. The oil tank cover has the beneficial effects that the structure is simple, the manufacturing cost is low, the good inclination and leakage preventing effect is achieved, and the oil tank cover has the anti-falling and anti-losing effect.

Description

technical field [0001] The invention relates to the field of fuel tank caps, in particular to an anti-tilt leakage fuel tank cap. Background technique [0002] The internal combustion engine uses fuel combustion as power, and the fuel is filled in the fuel tank and tightly closed by the fuel tank cap. In order to keep the air pressure in the fuel tank consistent with the atmospheric pressure (so that the fuel can be supplied normally), a vent hole is provided on the fuel tank cap, which communicates the outside atmosphere with the inner cavity of the fuel tank. Thus there will be a problem that when the fuel tank is in an overturned state, the fuel in the fuel tank will leak out from the fuel tank, bringing huge potential safety hazards. [0003] The fuel tank cap in the prior art generally has a check valve structure, and only when the outside air pressure is greater than the air pressure in the fuel tank and greater than the opening pressure of the check valve, the atmosp...

AI Technical Summary

Problems solved by technology

This makes the air pressure in the fuel tank sometimes greater than the outside air pressure, and sometimes lower than the outside air pressure, which affects the stability of the fuel supply of the fuel tank.

Moreover, the current one-way valve structure is not only complicated in structure, but when the fuel tank is dumped, the liquid is easy to leak from the fuel tank cap.

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