CN-122008844-A - Two-way ventilative and one-way pressurize fuel tank cap

Abstract

The invention relates to the technical field of fuel tank caps and discloses a fuel tank cap with bidirectional ventilation and unidirectional pressure maintaining, which comprises a fuel tank cap, a ventilation part, an anti-drop part, a fixing part and a plugging assembly, wherein the ventilation part is arranged on the fuel tank cap, the anti-drop part is arranged on the fuel tank cap, the fixing part is arranged on the fuel tank cap, the ventilation part comprises a sealing assembly, the sealing assembly is arranged on the fuel tank cap, the plugging assembly is arranged on the fuel tank cap, the sealing assembly comprises a sealing cover fixedly connected to the inner wall of the fuel tank cap, and two exhaust ports are formed in the sealing cover. By arranging the ventilation part, the problems that in the use process of the existing fuel tank cover, the dynamic change of the air pressure in the fuel tank is difficult to adapt, the fuel tank is burst and deformed due to inconvenient air exhaust in overpressure, the fuel tank is shrunken due to difficulty in timely supplementing air in negative pressure, the structural integrity of the fuel tank is damaged, the fuel supply of the fuel pump is unsmooth, the fuel supply pressure is unstable and the like are solved.

Inventors

• MA JINXING
• PAN JIAWEI
• LIU HUAN
• XIE ZHENXING
• YU JIE
• WANG MINGKANG
• ZHU HAILIN
• LU HAIQIAN
• An Xiaotian

Assignees

• 江苏威博液压股份有限公司

Dates

Publication Date

20260512

Application Date

20260204

Claims (8)

1. 1. The utility model provides a two-way ventilative and one-way pressurize fuel tank cap, includes fuel tank cap (111), its characterized in that still includes: a ventilation part (2), wherein the ventilation part (2) is installed on the fuel tank cover (111); an anti-drop part (3), wherein the anti-drop part (3) is arranged on the oil tank cover (111); A fixing portion (4), the fixing portion (4) being mounted on the fuel tank cap (111); The ventilation part (2) comprises a sealing assembly (21), the sealing assembly (21) is arranged on the oil tank cover (111), and -A plugging assembly (22), the plugging assembly (22) being arranged on a fuel tank cap (111); The sealing assembly (21) comprises a sealing cover (211) fixedly connected to the inner wall of the oil tank cover (111), two exhaust ports (212) are formed in the sealing cover (211), fixing frames (213) are connected to the inner walls of the two exhaust ports (212), telescopic rods (214) are fixedly connected to the inner walls of the two fixing frames (213), sealing balls (215) are fixedly connected to one sides, away from each other, of the two telescopic rods (214), and elastic pieces are arranged on the outer walls of the sealing balls (215); wherein, two exhaust ports (212) are relatively distributed on the sealing cover (211).
2. 2. A two-way ventilation and one-way pressure maintaining fuel tank cap as claimed in claim 1, wherein the anti-drop portion (3) comprises a sliding assembly (31), the sliding assembly (31) being mounted on the fuel tank cap (111), and -A friction assembly (32), said friction assembly (32) being arranged on a tank cap (111).
3. 3. The bidirectional ventilation and unidirectional pressure maintaining fuel tank cap as claimed in claim 1, wherein the fixing part (4) comprises an arc-shaped fixing rod (411) fixedly connected to the fuel tank cap (111), a pulling chain (412) is arranged on the arc-shaped fixing rod (411), a fixing plate (413) is fixedly connected to the tail end of the pulling chain (412), and a mounting piece is arranged on the fixing plate (413); wherein the pulling chain (412) is sleeved by a plurality of circular rings.
4. 4. The bidirectional ventilation and unidirectional pressure maintaining fuel tank cap as claimed in claim 1, wherein the plugging assembly (22) comprises two plugging plates (221) fixedly connected to the inner wall of the air outlet (212), and a plurality of ventilation openings (222) are respectively formed in the two plugging plates (221); Wherein both plugging plates (221) are located at the top of the exhaust port (212).
5. 5. The bidirectional ventilation and unidirectional pressure maintaining fuel tank cap as claimed in claim 2, wherein the sliding assembly (31) comprises a sliding groove (311) formed on the fuel tank cap (111), and a friction ring (312) is slidably connected in the sliding groove (311); wherein the friction ring (312) extends outside the fuel tank cap (111).
6. 6. The bidirectional ventilation and unidirectional pressure maintaining fuel tank cap as claimed in claim 2, wherein the friction assembly (32) comprises a second spring (321) arranged in the sliding groove (311), the top of the second spring (321) is fixedly connected with the fuel tank cap (111), the bottom of the sliding assembly (31) is fixedly connected with the friction ring (312), and a second friction pad (322) is arranged at the bottom of the friction ring (312); Wherein, the second friction pad (322) can contact with the outer wall of the oil tank.
7. 7. The bidirectional ventilation and unidirectional pressure maintaining fuel tank cap as claimed in claim 1, wherein the elastic member comprises a first spring (216) sleeved on the outer wall of the sealing ball (215), the bottom of the first spring (216) is fixedly connected with the telescopic rod (214), and the top of the first spring (216) is fixedly connected with the fixing frame (213); Wherein the initial state of the first spring (216) is a compressed state.
8. 8. A two-way gas-permeable and one-way pressure-maintaining tank cap according to claim 3, characterized in that said mounting means comprise suction cups (414) fixedly connected to the top of the fixed plate (413); Wherein, the inner wall of sucking disc (414) is coated with glue, and sucking disc (414) are used for adsorbing on the oil tank.

Description

Two-way ventilative and one-way pressurize fuel tank cap Technical Field The invention relates to the technical field of fuel tank caps, in particular to a fuel tank cap with bidirectional ventilation and unidirectional pressure maintaining. Background The traditional fuel tank cover is mostly of a single valve or simple ventilation structure, and has the obvious defects that the single valve can only perform one-way air intake or air exhaust, the fuel supply is not smooth and the fuel tank is easy to deform due to pressure unbalance, and the simple ventilation holes lead to a large amount of leakage of fuel vapor, pollute the environment and have potential safety hazards. Along with the stringent emission regulations and the improvement of the reliability requirements of vehicles, a need exists for a fuel tank cap capable of balancing pressure in a bidirectional ventilation manner and preventing leakage of fuel vapor in a unidirectional pressure maintaining manner. The design solves the double contradiction between pressure management and environmental protection performance of the traditional structure by independently controlling air inlet and air outlet through double valves, and meets the comprehensive requirements of sealing, pressure balance and emission reduction by being adapted to various fuel power equipment such as automobiles, motorcycles and the like. However, in the use process of the existing fuel tank cover, the dynamic change of the air pressure in the fuel tank is difficult to adapt, the fuel tank is inconvenient to exhaust when the overpressure is generated, the fuel tank is burst and deformed, the fuel tank is difficult to timely supplement air intake when the vacuum is generated, the fuel tank is shrunken, the structural integrity of the fuel tank is damaged, and the problems of unsmooth fuel supply of a fuel pump, unstable fuel supply pressure and the like are also caused. Disclosure of Invention The invention aims to provide a bidirectional ventilation and unidirectional pressure-maintaining fuel tank cover, and solves the problems that the existing fuel tank cover is difficult to adapt to the dynamic change of the air pressure in a fuel tank in the use process, the fuel tank is burst and deformed due to inconvenient air exhaust in overpressure, the fuel tank is deflated due to difficult timely air supplementing in negative pressure, the structural integrity of the fuel tank is damaged, the fuel supply of a fuel pump is unsmooth, the fuel supply pressure is unstable and the like by arranging a ventilation part. In order to solve the technical problems, the invention is realized by the following technical scheme: The invention discloses a bidirectional ventilation and unidirectional pressure-maintaining fuel tank cover, which comprises a fuel tank cover, a ventilation part, an anti-falling part, a fixing part and a plugging component, wherein the ventilation part is arranged on the fuel tank cover, the anti-falling part is arranged on the fuel tank cover, the fixing part is arranged on the fuel tank cover, the ventilation part comprises a sealing component, the sealing component is arranged on the fuel tank cover, the plugging component is arranged on the fuel tank cover, the sealing component comprises a sealing cover fixedly connected to the inner wall of the fuel tank cover, two air outlets are formed in the sealing cover, the inner walls of the two air outlets are respectively connected with a fixing frame, the inner walls of the two fixing frames are respectively fixedly connected with a telescopic rod, one sides, far away from each other, of the two telescopic rods are respectively fixedly connected with a sealing ball, the outer wall of the sealing ball is provided with an elastic piece, the two air outlets are relatively distributed on the sealing cover, the elastic piece comprises a first spring sleeved on the outer wall of the sealing ball, the bottom of the first spring is fixedly connected with the telescopic rod, the top of the first spring is fixedly connected with the fixing frame, and the initial state of the first spring is compressed. Further, the anti-falling part comprises a sliding component which is arranged on the oil tank cover, and a friction component which is arranged on the oil tank cover. Further, the fixed part comprises an arc-shaped fixed rod fixedly connected to the oil tank cover, a pulling chain is arranged on the arc-shaped fixed rod, a fixed plate is fixedly connected to the tail end of the pulling chain, a mounting piece is arranged on the fixed plate, the pulling chain is sleeved with a plurality of rings, the mounting piece comprises a sucker fixedly connected to the top of the fixed plate, glue is coated on the inner wall of the sucker, and the sucker is used for being adsorbed on the oil tank. Further, the shutoff subassembly includes two shutoff boards of fixed connection at the gas vent inner wall respectively, two a plurality of ventilative