CN208931512U - A kind of tank cap lock of trim tank air pressure - Google Patents

Abstract

The utility model relates to a kind of tank cap locks of trim tank air pressure, including lock body, lock core and capping, lock core is movable to be installed in lock body, lock body fixing seal is set in capping, capping one end is equipped with keyhole slip lid, the other end is equipped with sealing rubber ring, air-breather is also provided in lock body, air-breather includes just, negative pressure valve, positive valve includes fuel tank port, outer port and valve body, elastic component accommodating cavity is offered in valve body, elastic component is equipped in elastic component accommodating cavity, elastic component one end offsets with fuel tank port, the other end offsets with outer port, the ball sealer sealed to fuel tank port is equipped between fuel tank port and elastic component, the utility model has the beneficial effects that being equipped in the lock body of the utility model to fuel tank air pressure balance just, negative pressure valve, when fuel tank air pressure and external pressure balance, locking intracorporal positive and negative pressure valve can prevent stomata stifled Plug eliminates motorcycle tank air pressure change bring security risk.

Description

A kind of tank cap lock of trim tank air pressure

Technical field

The utility model relates to a kind of tank cap locks, and in particular to a kind of tank cap lock of trim tank air pressure.

Background technique

Tank cap lock has the function of locking fuel tank nozzle, prevents the leaking gasoline in fuel tank, but fuel tank is expanding with heat and contract with cold During, there is variation in air pressure in fuel tank, in order to prevent air pressure change and fuel tank is deformed, tank cap lock cannot seal, It has to reserve an air inlet/outlet, but what the air inlet/outlet of traditional tank cap lock protected without, and due to passing in and out gas Hole is set to the upper end of fuel tank cap, is connected by air inlet/outlet with the air valve of fuel tank lock bottom, such dust, ice and snow etc. are miscellaneous Object easily falls to air inlet/outlet from end face or water falls into air inlet/outlet and freezes, and can all cause the blocking to air inlet/outlet.Work as hair At work, oil pump can constantly pump from fuel tank motivation, and since the air inlet/outlet of fuel tank has been blocked, outside air Fuel tank internal can not be added to, just will form a vacuum in fuel tank, since the pressure that fuel tank is born is limited, fuel tank will be inhaled It is flat；If fuel tank is exposed to the sun or at an elevated temperature, tank internal pressure is caused to increase, Yi Yinqi fuel tank swell, very To fuel tank cracking oil leak is caused, lead to safety accident.

Utility model content

The technical problem to be solved by the utility model is in view of the above shortcomings of the prior art,

The tank cap lock that a kind of trim tank air pressure is provided, prevents air-hole blockage from eliminating safety accident.

To achieve the above object, the utility model provides following technical solution: a kind of tank cap lock of trim tank air pressure, Including lock body, lock core and capping, the lock core is movable to be installed in lock body, and the lock body fixing seal is set in capping, Described capping one end is equipped with keyhole slip lid, and the other end is equipped with sealing rubber ring, it is characterised in that: ventilation is also provided in the lock body Device, the air-breather include positive valve and negative pressure valve, and the positive valve includes fuel tank port, outer port and valve body, institute It states and offers a up-narrow and down-wide elastic component accommodating cavity in valve body, the elastic component accommodating cavity and fuel tank port and outer port phase It is logical, elastic component is equipped in the elastic component accommodating cavity, described elastic component one end offsets with fuel tank port, the other end and outer port phase It supports, the ball sealer sealed to fuel tank port is equipped between the fuel tank port and elastic component, the negative pressure valve includes negative pressure oil The outer port of case port, negative pressure and negative pressure valve body offer a up-narrow and down-wide negative pressure elastic component accommodating in the negative pressure valve body Chamber, the negative pressure elastic component accommodating cavity is communicated with negative pressure fuel tank port and the outer port of negative pressure, in the negative pressure elastic component accommodating cavity Equipped with negative pressure elastic component, negative pressure elastic component one end offsets with negative pressure fuel tank port, and the other end offsets with the outer port of negative pressure, institute It states and is equipped with the negative-pressure dense blocking sealed to port outside negative pressure between the outer port of negative pressure and negative pressure elastic component.

By adopting the above technical scheme, a kind of tank cap lock of trim tank air pressure, includes lock body, lock core and capping, described Air-breather is offered in lock body, the air-breather includes the positive valve being externally vented when air pressure is excessively high in fuel tank and works as oily Allow the negative pressure valve of external feed stream when air pressure is too low in case, the positive valve includes valve body, and described valve body one end is equipped with fuel tank gas Mouthful, the other end is equipped with outer port, and a up-narrow and down-wide elastic component accommodating cavity is also provided in the valve body, and the elastic component holds It sets the narrow one end of chamber to communicate with fuel tank port, wide one end is communicated with outer port, is equipped with and elasticity in the elastic component accommodating cavity The compatible elastic component of part accommodating cavity, the elastic component and the fuel tank port place of offseting are equipped with the ball sealer sealed to fuel tank port, The negative pressure valve is consistent with positive pressure valve arrangement, and 180 ° of positive valve are inverted, and two connected port size shapes are all the same, former First outer port position becomes negative pressure fuel tank port, and fuel tank port position becomes the outer port of negative pressure, and change can be used as negative pressure valve use, no Mould development is carried out with to negative pressure valve, has saved production cost.

A kind of tank cap lock of above-mentioned trim tank air pressure can be further arranged are as follows: the elastic component and negative pressure elastic component It is pagoda spring.

A kind of tank cap lock of above-mentioned trim tank air pressure can be further arranged are as follows: the ball sealer and negative-pressure dense blocking It is ball.

The utility model has the beneficial effects that positive and negative pressure valve is equipped in the lock body of the utility model, when fuel tank air pressure and outside When air pressure balance, air-hole blockage can be prevented by locking intracorporal positive and negative pressure valve, and when fuel tank air pressure is greater than external pressure, positive valve is to fuel tank Air pressure is deflated, and when fuel tank air pressure is less than external pressure, negative pressure valve eliminates motorcycle tank air pressure change to fuel tank air pressure air inlet Bring security risk.

The utility model is described in further detail with reference to the accompanying drawings and examples.

Detailed description of the invention

Fig. 1 is the bottom view of the utility model embodiment.

Fig. 2 is the structural schematic diagram of the utility model embodiment.

Fig. 3 is the schematic diagram of internal structure of Fig. 2.

Fig. 4 is the top view of the utility model embodiment.

Fig. 5 is the structural schematic diagram of the utility model embodiment air-breather.

Specific embodiment

As Figure 1-Figure 5, a kind of tank cap lock of trim tank air pressure, including lock body 1, lock core 2 and capping 3, lock core 2 can Activity is installed in lock body 1, and 1 fixing seal of lock body is set in capping 3, and 3 one end of capping is equipped with keyhole slip lid 31, and the other end is set There is sealing rubber ring 4, air-breather is also provided in lock body 1, air-breather includes positive valve 51 and negative pressure valve 52, and positive valve 51 wraps Containing fuel tank port 511, outer port 512 and valve body 513, a up-narrow and down-wide elastic component accommodating cavity is offered in valve body 513 514, elastic component accommodating cavity 514 is communicated with fuel tank port 511 and outer port 512, and elastic component is equipped in elastic component accommodating cavity 514 516, elastic component 516 is up-narrow and down-wide pagoda spring compatible with elastic component accommodating cavity 514, the narrow one end of elastic component 516 It offsets with fuel tank port 511, wide end offsets with outer port 512, is equipped between fuel tank port 511 and elastic component 516 to fuel tank The ball sealer 515 that port 511 seals, ball sealer 515 are ball, and it is narrow that the internal diameter of ball sealer 515 is greater than elastic component accommodating cavity 514 One end diameter, negative pressure valve 52 includes negative pressure fuel tank port 521, the outer port of negative pressure and 522 negative pressure valve bodies 523, negative pressure valve A up-narrow and down-wide negative pressure elastic component accommodating cavity 524, negative pressure elastic component accommodating cavity 524 and negative pressure fuel tank are offered in body 523 Port 521 and the outer port 522 of negative pressure communicate, and 524 are equipped with negative pressure elastic component 526, negative pressure elastic component in negative pressure elastic component accommodating cavity 526 one end offset with negative pressure fuel tank port 521, and the other end offsets with the outer port 522 of negative pressure, the outer port 522 of negative pressure and negative pressure bullet Property part 525 between be equipped with to outside negative pressure port 522 seal negative-pressure dense blocking 525, the negative pressure valve 52 and positive pressure of the utility model 51 structure of valve is consistent, and positive valve 51 is carried out 180 ° of inversions, and change can be used as the use of negative pressure valve 52,

A kind of tank cap lock of trim tank air pressure of the utility model is mounted on motorcycle tank, when fuel tank air pressure with When external pressure is consistent, negative pressure elastic component 526, which can apply pressure to negative-pressure dense blocking 525, enters external rainwater, dust etc. Less than fuel tank, since air-breather is arranged inside lock body 1, outer port 512 passes through lock core 2 and keyhole with the outer port 525 of negative pressure The equal gaps ventilation of slip lid 31, when fuel tank air pressure is higher than external pressure, positive valve 51 works at this time, and fuel tank air pressure passes through fuel tank gas Mouth 511 is transferred in positive valve 51, is pushed the ball sealer 515 in elastic component accommodating cavity 514, is that deformation occurs for elastic component 516, by In elastic component accommodating cavity 514 be up-narrow and down-wide cylindrical structure, after ball sealer 515 is passed due to fuel tank air pressure, fuel tank gas Pressure is transported to outer port 512 by elastic component accommodating cavity 514 and deflates, and makes fuel tank air pressure and outer air pressure balance, subsequent elastic component 516 515 return leakproof fuel cell port 511 of ball sealer is driven, when fuel tank air pressure is lower than external pressure, negative pressure valve 52 works at this time, when External pressure pushes negative-pressure dense blocking 525 by the outer port 522 of negative pressure, and external pressure is made to pass through negative pressure elastic component accommodating cavity 524 Negative pressure fuel tank port 521 is entered to fuel tank air inlet, supplying fuel tank air pressure makes its pressure balance, subsequent 526 band of negative pressure elastic component The dynamic outer port 522 of 525 return sealed negative-pressure of negative-pressure dense blocking, positive and negative pressure valve are supplied gas back and forth, make fuel tank port 511, negative pressure oil The outer port 522 of case port 521, negative pressure and outer 512 activity of port, make the unobstructed unlikely blocking of stomata, trim tank air pressure, protection oil Case safety.

Claims (3)

1. a kind of tank cap lock of trim tank air pressure, including lock body, lock core and capping, the lock core is movable to be installed in lock body Interior, the lock body fixing seal is set in capping, and described capping one end is equipped with keyhole slip lid, and the other end is equipped with sealing rubber ring, It is characterized by: being also provided with air-breather in the lock body, the air-breather includes positive valve and negative pressure valve, the positive pressure Valve includes fuel tank port, outer port and valve body, and a up-narrow and down-wide elastic component accommodating cavity is offered in the valve body, described Elastic component accommodating cavity is communicated with fuel tank port and outer port, and elastic component, the elastic component one are equipped in the elastic component accommodating cavity End offsets with fuel tank port, and the other end offsets with outer port, is equipped between the fuel tank port and elastic component close to fuel tank port The ball sealer of envelope, the negative pressure valve include negative pressure fuel tank port, the outer port of negative pressure and negative pressure valve body, are opened in the negative pressure valve body Equipped with a up-narrow and down-wide negative pressure elastic component accommodating cavity, outside the negative pressure elastic component accommodating cavity and negative pressure fuel tank port and negative pressure Port communicates, and negative pressure elastic component, negative pressure elastic component one end and negative pressure fuel tank gas are equipped in the negative pressure elastic component accommodating cavity Mouth offsets, and the other end offsets with the outer port of negative pressure, is equipped between the outer port of the negative pressure and negative pressure elastic component to port outside negative pressure The negative-pressure dense blocking of sealing.

2. a kind of tank cap lock of trim tank air pressure according to claim 1, it is characterised in that: the elastic component and negative pressure Elastic component is pagoda spring.

3. a kind of tank cap lock of trim tank air pressure according to claim 1, it is characterised in that: the ball sealer and negative pressure Ball sealer is ball.