Oil tank cover and oil tank

Abstract

Disclosed are a fuel tank cap and a fuel tank. According to the technical scheme, the fuel tank cap is characterized by comprising an outer cap body and an inner cap body, the outer cap body is used for being in threaded connection with a fuel tank opening, the inner cap body is arranged in the outer cap body and can be telescopically adjusted along the outer cap body, a baffle ring used for installing a first sealing ring is fixed to the periphery of the inner cap body, and an adjusting cavity is formed in the inner cap body; the adjusting cavity is sealed and filled with buffering media, an adjusting plug is connected in the adjusting cavity in a piston mode and can be adjusted in the telescopic direction of the inner cover in a piston mode, an adjusting rod is fixedly connected to one end of the adjusting plug, and the other end of the adjusting rod penetrates through a first through hole in the end of the inner cover and is fixedly connected with the outer cover. The adjusting rod and the first through hole are sealed. Pressure on the inner side and the outer side of the oil tank can be balanced, the pressure stability of the oil tank is kept, the tightness degree of the oil tank cover during covering can be improved, and the covering stability of the oil tank cover is improved.

Description

technical field [0001] The present invention relates to the technical field of fuel tanks, more specifically, it relates to a fuel tank cap and also relates to a fuel tank. Background technique [0002] The fuel tank cap is installed on the fuel tank port to seal the fuel tank and limit the volatilization of fuel vapor in the fuel tank to the atmosphere. When the fuel tank cap is used to cover and seal the fuel tank port, it is usually connected by thread or card connection, and a seal is installed between the fuel tank cap and the fuel tank port to seal the fuel tank and avoid volatilization of fuel. [0003] The current fuel tank cap often adopts a simple sealing and connection structure. When the cap is installed, a certain tightening force of the fuel tank cap is maintained. When the cap is installed, a virtual cap may occur, that is, the tightening is insufficient. Although the short-term sealing can be achieved, the With the passage of time, the internal and external ...

AI Technical Summary

Problems solved by technology

[0003] The current fuel tank cap often adopts a simple sealing and connection structure. When the cap is installed, a certain tightening force of the fuel tank cap is maintained. When the cap is installed, a virtual cap may occur, that is, the tightening is insufficient. Although the short-term sealing can be achieved, the With the passage of time, the internal and external environment of the fuel tank may be subject to temperature differences, vibrations, etc., which may cause the fuel tank cap to become loose, resulting in the fuel tank being opened to the outside environment, resulting in fuel volatilization

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