CN203130305U

CN203130305U - Fuel tank cap

Info

Publication number: CN203130305U
Application number: CN 201320097667
Authority: CN
Inventors: 喻贵柯
Original assignee: CHONGQING CHUANGXIANG ZHONGHUI ELECTROMECHANICAL Co Ltd
Current assignee: CHONGQING CHUANGXIANG ZHONGHUI ELECTROMECHANICAL Co Ltd
Priority date: 2013-03-04
Filing date: 2013-03-04
Publication date: 2013-08-14
Anticipated expiration: 2023-03-04

Abstract

The utility model provides a fuel tank cap. The fuel tank cap comprises an outer lock cap body, an inner lock cap body and a lock block, wherein the outer lock cap body is in interference fit with the outer lock cap body, two ends of the lock block penetrate through holes in two sides of the inner lock cap body and extend outwards, a spring is disposed between the lock block and the inner lock cap body, and a vent hole is opened on the outer lock cap body and communicated with an air inlet arranged on an air cleaner outside the fuel tank through an air pipe. The fuel tank cap has the advantages that by means of the structure, a fuel evaporator is replaced by combined usage of the sealed fuel tank cap and the air pipe, the fuel tank cap is convenient to operate and stable and reliable in performance, and the production cost is reduced simultaneously.

Description

A kind of fuel tank cap

Technical field

The utility model relates to a kind of fuel tank cap.

Background technique

At present, the general gasoline engines fuel tank is in order to improve the utilization ratio of fuel oil, prevent that oil vapor is discharged into formation pollution in the air, general hermetic fuel tank and the fuel tank cap of adopting, adopt fuel evaporator simultaneously, under the effect of air-strainer, make oil vapor enter into the firing chamber by fuel evaporator and special-purpose breathing pipe and carry out secondary combustion, but traditional fuel tank cap is difficult to reach hermetic effect, as long as have the space between fuel tank and the fuel tank cap, oil vapor will be discharged into the atmosphere from the space, causes the wasting of resources, the method manufacture cost is big simultaneously, complicated operation.

The model utility content

The fuel tank cap that the purpose of this utility model provides a kind of easy-to-operat and reduces production costs.

The technical solution of the utility model is achieved in that a kind of fuel tank cap, comprise the lock enclosing cover and with the lock inner cap of its interference fit, have two symmetrical holes in the both sides of described lock inner cap; Also comprise lock dog, the hole that lock inner cap both sides are passed at described lock dog two ends stretches out, and is provided with spring between lock dog and the lock inner cap, and described lock covers outward and has vent, and described vent is connected by breathing pipe with suction port on the fuel tank air-strainer outward.

The beneficial effects of the utility model are: after adopting said structure, because interference fit between lock inner cap and the lock enclosing cover so do not have the gap between lock inner cap and the lock enclosing cover, has two symmetrical holes in the both sides of described lock inner cap; The hole that lock inner cap both sides are passed at described lock dog two ends stretches out, and be provided with spring between lock dog and the lock inner cap, the lock inner cap is provided with O-ring seal at the edge near reservoir port, lock dog and reservoir port link closely under the effect of spring, the seal ring compression makes and seals between fuel tank and the fuel tank cap, outside lock, cover again and have the hole, described hole and breathing pipe are tightly connected, so the oil vapor in the fuel tank is diffused into vent by the hole that covers symmetry in locking, enter the firing chamber by breathing pipe then and carry out secondary combustion, this device has replaced fuel evaporator, easy-to-operat with being used of sealing oil case lid and breathing pipe, stable performance, reliably, reduce production costs simultaneously.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment technological scheme, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is that this practicality is in order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiments more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the sectional view of Figure 1A-A;

Fig. 3 is the sectional view of Figure 1B-B.

Embodiment

Below in conjunction with the accompanying drawing among the utility model embodiment, the technological scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment who obtains under the creative work prerequisite, all belong to the scope of the utility model protection.

As Fig. 1, Fig. 2 and a kind of fuel tank cap shown in Figure 3, comprise lock enclosing cover 2 and with the lock inner cap 1 of its interference fit, have two symmetrical holes 8 in the both sides of described lock inner cap 1; Also comprise lock dog 6, the hole 8 that lock inner cap 1 both sides are passed at described lock dog 6 two ends stretches out, and lock dog 6 and lock are provided with spring 7 between the inner cap 1, have vent 5 on the described lock enclosing cover 2, and described vent 5 is connected by breathing pipe 4 with suction port on the fuel tank air-strainer outward; Like this, interference fit between lock inner cap 1 and the lock enclosing cover 2 so do not have the gap between lock inner cap 1 and the lock enclosing cover 2, has two symmetrical holes 8 in the both sides of described lock inner cap 1; The hole 8 that lock inner cap 1 both sides are passed at described lock dog 6 two ends stretches out, and be provided with spring 7 between lock dog 6 and the lock inner cap 1, lock inner cap 1 is provided with O-ring seal 3 at the edge near reservoir port, lock dog 6 links closely with reservoir port under the effect of spring 7, seal ring 3 compressions make and seal between fuel tank and the fuel tank cap, the other end at breathing pipe 4 is connected with air-strainer again, under the effect of air-strainer, oil vapor in the fuel tank is diffused into vent 5 by the hole 8 of symmetry on the lock inner cap 1, enter the firing chamber by breathing pipe 4 then and carry out secondary combustion, this device has replaced fuel evaporator with being used of sealing oil case lid and breathing pipe 4, easy-to-operat, stable performance, reliably, reduce production costs simultaneously.

Further, be tightly connected by pressure welding between described vent 5 and the breathing pipe 4; Sealing between vent 5 and the breathing pipe 4 like this prevents from that oil vapor is diffused in the air to pollute.

Preferably, described lock inner cap 1 is provided with O-ring seal 3 at the edge near reservoir port, make to form hermetic space between fuel tank and locking closure, make oil steam in oil tank under the effect of air-strainer, can only enter the firing chamber along breathing pipe and burn, reach the function of zero-emission.

The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. fuel tank cap is characterized in that: comprise lock enclosing cover (2) and with the lock inner cap (1) of its interference fit, have two symmetrical holes (8) in the both sides of described lock inner cap (1); Also comprise lock dog (6), the hole (8) that lock inner cap (1) both sides are passed at described lock dog (6) two ends stretches out, and be provided with spring (7) between lock dog (6) and the lock inner cap (1), have vent (5) on the described lock enclosing cover (2), the suction port on the outer air-strainer of described vent (5) and fuel tank is connected by breathing pipe (4).

2. a kind of fuel tank cap according to claim 1 is characterized in that: be tightly connected by pressure welding between described vent (5) and the breathing pipe (4).

3. a kind of fuel tank cap according to claim 1 is characterized in that: described lock inner cap (1) is provided with O-ring seal (3) at the edge near reservoir port.