A small spring-type refueling port door for a heavy-duty truck fuel tank

Abstract

The invention discloses a spring type oiling opening small door of a heavy type truck oil tank. The spring type oiling opening small door comprises a door plate, an inner cover, a spring, a pin shaft, a chain, breathing holes and a chain fixing hole. A first pin shaft supporting hole is formed in one end of the door plate, a second pin shaft supporting hole is formed in one end of the inner cover, the door plate is connected with the inner cover through a pin shaft in the mode of freely rotating around the pin shaft, the inner cover is fixed to the oil tank body through a screw, the pin shaft is sleeved with the spring, one end of the spring is in an L shape and is supported at the bottom of the inner cover, the other end of the spring is in a U shape, the spring penetrates through the chain fixing hole and is directly connected with the chain, the breathing holes are two through holes and are respectively formed in the door plate, the chain fixing hole is a through hole, and is formed in a handle of the door plate, one end of the chain is tied on the door plate, and the other end of the chain is tied on the oil tank cover. The spring type oiling opening small door has the advantages of being simple in structure, low in manufacturing cost, easy and convenient to operate, easy and convenient to assemble, smooth in oiling, free of splashing of scattered oil drops in the reset process of the inner cover and the like.

Description

technical field [0001] The invention relates to a filling port of a fuel tank of a heavy truck, in particular to a small spring type filling port door of the fuel tank of a heavy truck. Background technique [0002] With the implementation of the National IV emission standards for the heavy-duty truck market, the quality requirements for diesel are getting higher and higher. At present, except for the lock cover, the fuel tank of the heavy truck fuel tank is directly connected to the oil cavity through the filter screen. The commonly used lock cover on the market generally adopts a three-claw slot structure. When it is assembled with the fuel tank, it cannot be completely sealed, causing the vehicle Diesel splashes and overflows during refueling and driving will cause dust to accumulate around the fuel filler, affecting beautification, and will cause pollution to diesel in the long run. [0003] In recent years, the above-mentioned similar technical problems have received p...

AI Technical Summary

Problems solved by technology

In this way, on the one hand, it is necessary to apply a large force to push the inner door panel open during use. If there is a slight carelessness, the spring leaf may break off. Gasoline spilled on the door panel and its surroundings splashed on the face or other parts of the body of the operator; Elastic deformation causes the failure of the spring leaf and affects the service life;

[0009] Furthermore, in a relatively narrow space, the installation structure is relatively complicated, which will inevitably cause difficulties and inconveniences in the disassembly and installation operations of the leaf spring parts.

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