CN2726938Y

CN2726938Y - Leak proof oil box cover

Info

Publication number: CN2726938Y
Application number: CN 200420060536
Authority: CN
Inventors: 李刚; 王清友
Original assignee: Chongqing Zongshen Technology Development and Research Co Ltd
Current assignee: Chongqing Zongshen Technology Development and Research Co Ltd
Priority date: 2004-07-29
Filing date: 2004-07-29
Publication date: 2005-09-21
Anticipated expiration: 2014-07-29

Abstract

The utility model relates to a fuel box cover used on the motor vehicle and especially the motorcycle, comprising an external cover and an internal cover whose upper end is inlaid in the external cover. An inner liner is arranged between the external cover and the internal cover, and the space between the external cover and the internal cover is divided into two parts. The upper end of the internal cover is provided with a through hole, the lower part of the internal cover is provided with a through hole, and the inner of the inner liner is provided with a one-way valve which can communicate the space between the inner liner and the external cover with the space between the inner liner and the internal cover in a unidirectional way. The inner liner is sheathed with a cover bolt matching with the inner liner in the way of clearance fit, and two ends of the cover bolt penetrate through the through hole arranged at the side wall of the internal cover which is provided with a compression spring whose both ends respectively act on the cover bolt and the bottom of the internal cover. The leak proof oil box cover not only can automatically regulate the balance between the air pressure in the fuel box and the external atmospheric pressure, but also can reliably and effectively prevent the leakage of the fuel from the fuel box port.

Description

The anti-leak fuel lid

Technical field

The utility model relates to the oil plant case lid that uses on a kind of self-propelled vehicle, the particularly motor bike.

Technical background

Fuel lid is the oil closing appliance of hopper mouth of power actuated vehicle, because the oil plant case mouth of self-propelled vehicle all is arranged on oil plant upper box part and opening up, in the static or stable driving process of self-propelled vehicle, the oil in the oil plant case can not overflow from oil plant case mouth.But the oil mass in the oil plant case is fuller, and vehicle ' is when jolting, and oil plant just leaks out from oil plant case mouth easily, pollute and waste, and particularly when inclination of vehicle or incline then, the easier a large amount of leakages that cause oil plant, and very easily cause safety misadventure.

The patent No. is that 02214476.5 utility model patent discloses a kind of automotive oil case lid, its can automatically regulating oil plant case internal gas pressure and the ambient pressure balance in, also more efficiently prevented the leakage of oil plant.The leakproof of this fuel lid is to realize with the applying of oil plant case mouth end face under a compression spring effect by its inner cap end face, but because inner cap and oil plant case mouth are metallic material, can not reach between its end face fit fully airtight, so for the vehicle that often occurs in motion jolting, tilting even incline as motor bike, the anti-leak result of this fuel lid is still not good.

The utility model content

Technical problem to be solved in the utility model provides a kind of anti-leak fuel lid, in automatically regulating oil plant case internal gas pressure and ambient pressure balance, can effectively prevent the leakage of oil plant from reservoir port.

Anti-leak fuel lid described in the utility model, comprise that enclosing cover and upper end are embedded in the inner cap in the enclosing cover, between enclosing cover and inner cap, be provided with liner, liner is divided into two the space between enclosing cover and the inner cap, offer through hole in the inner cap upper end, space between liner and the enclosing cover is in communication with the outside, offer through hole in the inner cap bottom, after fuel lid covers reservoir port, space between liner and the inner cap is communicated with fuel tank internal, check valve is installed in the liner, can be with the space unilaterally connected between the space between liner and the enclosing cover and liner and the inner cap, promptly only allow to have the gas of certain pressure or liquid and enter space between inner cap and the liner from the space between liner and the enclosing cover.On liner, be with lid door bolt and liner free-running fit, the through hole that lid door bolt two ends are offered from the inner cap sidewall passes, in inner cap, be provided with compression spring, its two ends act on lid door bolt and inner cap bottom respectively, the lid door bolt can be moved down under external force, in case and external force disappears, it is rapid return that lid is latched under the compression spring effect.

Be provided with a step in the inner cap upper end, closely be set with seal ring on the inner cap, its end face and inner cap step outer face are fitted; Liner upper end is provided with two steps, makes liner and inner cap interference fit by the periphery of a step wherein, and another step end face of liner is by seal ring and the applying of inner cap step inner end surface.

Lid door bolt in this anti-leak fuel lid can be with fuel lid card press fit on reservoir port, and the seal ring end face that covers suit in this moment contacts with the reservoir port end face and it is sealed, and the oil plant impassabitity reservoir port in the oil plant case is leaked out; And enter the oil plant in space between inner cap and liner in the through hole of offering by the inner cap bottom, then because the formed sealing of interference fit at inner cap and liner step place is arranged, and the sealing of seal ring between another step end face of liner and inner cap step inner end surface, make that the oil plant in the space can not leak out between inner cap and liner; And owing in the liner check valve is installed, this check valve only allows to have the gas of certain pressure or liquid and enters space between inner cap and the liner from the space between liner and the enclosing cover, so this check valve of oil plant impassabitity in the space enters in the space between liner and the enclosing cover in the through hole of being offered by the inner cap upper end again and leaks out between inner cap and liner.And along with the use of oil plant in the oil plant case, when making the interior air pressure of oil plant case be reduced to a certain degree, outside air will enter by the through hole that inner cap upper end is offered in the space between liner and the enclosing cover, and enter space between inner cap and the liner through check valve, enter in the oil plant case by the interior through hole of offering that covers again, make oil plant case internal gas pressure and ambient pressure balance.So anti-leak fuel lid described in the utility model not only can automatically regulating oil plant case internal gas pressure and the balance of ambient pressure, and can also reliably prevent the leakage of oil plant from reservoir port effectively.

Description of drawings

Now in conjunction with the accompanying drawings the utility model is described in further detail.

Fig. 1 looks scheme drawing for the master of a kind of concrete structure of anti-leak fuel lid described in the utility model;

Fig. 2 is the upward view of Fig. 1;

Fig. 3 is the main diagrammatic sketch of inner cap in this anti-leak fuel lid;

Fig. 4 is the main diagrammatic sketch of liner in this anti-leak fuel lid;

Fig. 5 is the front view of this anti-leak fuel lid middle cover door bolt;

Fig. 6 is the upward view of Fig. 3.

The specific embodiment

To shown in Figure 6, this anti-leak fuel lid comprises that enclosing cover 1 and upper end are embedded in the inner cap 5 in the enclosing cover 1 as Fig. 1, and inner cap 5 upper ends are provided with a step 13, closely are set with seal ring 4 on the inner cap 5, and its end face and inner cap 5 step outer faces 14 are fitted.Between enclosing cover 1 and inner cap 5, be provided with liner 8, liner 8 upper ends are provided with two

steps

15,16, make liner 8 and inner cap 5 interference fit by the periphery of a step 16 wherein, liner 8 another step 15 end faces are fitted by seal ring 2 and inner cap 5 step inner end surfaces 12, thereby liner 8 is divided into two the space between enclosing cover 1 and the inner cap 5.Offer through hole 3 in inner cap 5 upper ends, space between liner 8 and the enclosing cover 1 is in communication with the outside, offer through hole 7 at inner cap 5 lower sides, also offer through hole 10 in inner cap 5 lower end surface, after fuel lid covered reservoir port, this through hole 7,10 made the space between liner 8 and the inner cap 5 be communicated with fuel tank internal.Check valve 11 is installed in the liner 8, can be with the space unilaterally connected between the space between liner 8 and the enclosing cover 1 and liner 8 and the inner cap 5, promptly only allow to have the gas of certain pressure or liquid and enter space between inner cap 5 and the liner 8 from the space between liner 8 and the enclosing cover 1.On liner 8, be with lid door bolt 6 and liner 8 free-running fits, the through hole 7 that lid door bolt 6 two ends are offered from inner cap 5 sidewalls passes, in inner cap 5, be provided with compression spring 9, its two ends act on lid door bolt 6 and inner cap 5 bottoms respectively, the upper edge that makes lid door bolt 6 two ends upwards withstand inner cap 5 sidewall through holes 7, and lid door bolt 6 can move down under external force, in case and external force disappears, lid door bolt 6 is rapid return under compression spring 9 effects.

Claims

1, a kind of anti-leak fuel lid, comprise that enclosing cover (1) and upper end are embedded in the inner cap (5) in the enclosing cover, it is characterized in that: between enclosing cover and inner cap, be provided with liner (8), liner is divided into two the space between enclosing cover and the inner cap, offer through hole (3) in the inner cap upper end, space between liner and the enclosing cover is in communication with the outside, offer through hole in the inner cap bottom, space between liner and the inner cap is communicated with fuel tank internal, check valve (11) is installed in the liner, can be with the space unilaterally connected between the space between liner and the enclosing cover and liner and the inner cap; Be with lid door bolt (6) and liner free-running fit on liner, the through hole (7) that lid door bolt two ends are offered from the inner cap sidewall passes, and is provided with compression spring (9) in inner cap, and its two ends act on lid door bolt and inner cap bottom respectively.

2, anti-leak fuel lid according to claim 1 is characterized in that: be provided with a step (13) in inner cap (5) upper end, in cover and be set with seal ring (4), its end face and inner cap step outer face (14) applying; Liner (8) upper end is provided with two steps (15,16), makes liner and inner cap interference fit by the periphery of a step (16) wherein, and another step of liner (15) end face is by seal ring (2) and inner cap step inner end surface (12) applying.