Oil filling lock cover

Abstract

The utility model relates to the technical field of fuel tank caps, in particular to a refueling lock cap which comprises a refueling lock cap body, a lock cap connecting body and a screw cap which are clamped and fixed are arranged on the refueling lock cap body, and a fixing seat, a first spring, a supporting seat, a sealing gasket, a vacuum valve and a second spring are sequentially arranged in the lock cap connecting body from top to bottom. The outer portions of the fixing base and the supporting base are both of a T-shaped structure, a through hole is formed in the bottom of the fixing base, air holes are evenly formed in the side face of the bottom of the supporting base at intervals, the bottom of the fixing base is sleeved with the first spring, the first spring is clamped above the inner side of the supporting base, and the vacuum valve penetrates through the middle of the supporting base. According to the refueling lock cover, the vacuum valve made of rubber is adopted, the air pressure compensation function when the oil tank is in negative pressure is achieved through the elasticity of rubber, the supporting plate made of plastic is used, resistance is reduced, and under the condition that the same function is achieved, the structure is simpler, and the effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel tank covers, in particular to a fuel tank lock cover. Background Art

[0002] The fuel lock cap, also often called the fuel tank cap, is a device used to seal the fuel tank opening on a car. When the fuel tank is under positive pressure, it has an exhaust protection function to prevent the fuel tank pressure from being too high, causing risks such as deformation or even cracking; when the fuel tank is under negative pressure, it has an air replenishment protection function to prevent the fuel tank from being sucked in and deformed.

[0003] The valve core of the existing fuel lock cover usually uses a metal support plate to fix the plastic vacuum valve, and the sealing gasket is fixed between the support plate and the vacuum valve. When the fuel tank is under positive pressure, the air pressure pushes the support plate and the sealing gasket to achieve exhaust. When the fuel tank is under negative pressure, the negative pressure pushes the vacuum valve and the gas is sucked into the fuel tank. However, the metal support plate has a certain weight, which will cause a certain resistance to the air pressure. At the same time, the existing vacuum valve usually combines spring plastic parts and rubber structures, and uses spring pressure for conventional sealing. When negative pressure occurs, the spring is compressed, and the channel is opened for negative pressure air replenishment, resulting in insufficient exhaust speed, which affects the use. Utility Model Content

[0004] The purpose of the utility model is to provide a refueling lock cover to solve the problem raised by the above background technology that the valve core of the refueling lock cover on the market currently usually adopts a metal support plate to fix the plastic vacuum valve, and the sealing gasket is fixed between the support plate and the vacuum valve. The metal support plate has a certain weight, which will cause a certain resistance to the air pressure push, resulting in insufficient exhaust speed and affecting the use.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a refueling lock cover, including a refueling lock cover body, the refueling lock cover body is provided with a lock cover connector and a screw cover that are fixed by clamping, and the lock cover connector is provided with a fixing seat, a first spring, a support seat, a sealing gasket, a vacuum valve and a second spring from top to bottom, the outside of the fixing seat and the support seat are both T-shaped structures, and a through hole is opened at the bottom of the fixing seat, and air holes are evenly spaced on the side of the bottom of the support seat, the first spring is sleeved on the outside of the bottom of the fixing seat, and the first spring is clamped on the upper inner side of the support seat, the vacuum valve runs through the middle of the support seat, and the vacuum valve is provided with conical structures inside and outside the support seat respectively.

[0006] Preferably, the lock cover connector is an integrally injection-molded plastic part, and a fastening ring with a C-shaped cross-section is sleeved on the upper end of the outer side of the lock cover connector, and the outer side of the lock cover connector is a threaded structure.

[0007] Preferably, a circle of second card grooves is provided at the bottom inner side of the lock cover connector, and a circle of first card grooves is provided in the outer circle above the second card grooves in the lock cover connector, the sealing gasket is placed above the first card groove, and the sealing gasket is sleeved at the lower part of the T-shaped structure of the support seat, and the sealing gasket and the vacuum valve are both made of rubber material.

[0008] Preferably, the lock cover connecting body is provided with integrally structured snap-fitting seats evenly spaced above the second snap-fitting slot, and the top of the fixing seat is fastened and snap-fitted between the snap-fitting seats.

[0009] Preferably, the second spring is sleeved and matched with the conical structure below the vacuum valve, and the lower end of the second spring is clamped in the second clamping groove.

[0010] Preferably, a positioning ring is provided on the movable sleeve of the screw cap, and one end of the positioning ring is connected to an elastic connecting piece, and the other end of the elastic connecting piece is penetrated and fixed with a positioning piece.

[0011] Preferably, the support seat is an integrally injection-molded plastic part, and the lower part of the support seat is arranged in contact with the upper part of the conical structure below the vacuum valve.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the refueling lock cover adopts a vacuum valve made of rubber material, utilizes the elasticity of the rubber itself to realize the air pressure compensation function when the fuel tank is under negative pressure, and uses a support plate made of plastic material to reduce resistance. Under the condition of realizing the same function, the structure is simpler and the effect is better. The refueling lock cover makes the vacuum valve and the support plate fastened and penetrated, and respectively sets a conical structure at the inner and outer parts of the vacuum valve and the support plate, which can respectively conduct flow diversion for intake and exhaust, and at the same time, the vacuum valve itself has elasticity and can take in air when under negative pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the external three-dimensional structure of a refueling lock cover of the utility model;

[0014] Figure 2 This is a top view of a refueling lock cover of the utility model;

[0015] Figure 3 This is a side view of the internal structure of a refueling lock cover of the utility model;

[0016] Figure 4 This is an exploded view of a refueling lock cover of the utility model;

[0017] Figure 5 The utility model is a schematic diagram of exhausting and replenishing air for a refueling lock cover.

[0018] In the figure: 1. refueling lock cover body; 2. lock cover connector; 201. snap-fit ​​seat; 202. first slot; 203. second slot; 3. screw cap; 4. positioning ring; 5. elastic connector; 6. positioning member; 7. fastening ring; 8. first spring; 9. second spring; 10. fixing seat; 1001. through hole; 11. supporting seat; 1101. air vent; 12. sealing gasket; 13. vacuum valve. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-5The utility model provides a technical solution: a refueling lock cover, including a refueling lock cover body 1, a lock cover connector 2 and a screw cover 3 that are fixed by clamping are arranged on the refueling lock cover body 1, the lock cover connector 2 is an integrally injection-molded plastic part, and a fastening ring 7 with a C-shaped cross-section is sleeved on the upper end of the outer side of the lock cover connector 2, and the outer side of the lock cover connector 2 is a threaded structure, which enables the lock cover connector 2 to fix the oil tank port through the threaded structure, and the fastening ring 7 is used for sealing and fastening after the lock cover connector 2 is closed, and a fixing seat 10, a first spring 8, a support seat 11, a sealing gasket 12, a vacuum valve 13 and a second spring 9 are arranged in sequence from top to bottom in the lock cover connector 2, and a circle of second card groove 20 is provided at the bottom of the inner side of the lock cover connector 2 3, and a circle of first card grooves 202 are also provided in the outer circle part above the second card groove 203 in the lock cover connecting body 2, the sealing gasket 12 is placed above the first card groove 202, and the sealing gasket 12 is sleeved on the lower part of the T-shaped structure of the support seat 11, and the sealing gasket 12 and the vacuum valve 13 are both made of rubber material, this structure makes the sealing gasket 12 and the support seat 11 relatively stable, so that the support seat 11 and the sealing gasket 12 are pushed synchronously, and the vacuum valve 13 is also elastic due to the rubber material, so that the vacuum valve 13 itself has a certain air pressure compensation function, which has a protective effect, and the lock cover connecting body 2 is evenly spaced above the second card groove 203 and the card seat 201 of an integrated structure is evenly spaced, and the upper part of the fixing seat 10 is tightly engaged between the card seat 201, this structure makes the fixing seat 10 The fixed seat 10 can be firmly fixed in the lock cover connector 2 through the clamping seat 201 to ensure the stable positioning of the fixed seat 10. At the same time, the fixed seat 10 performs gas circulation through the through hole 1001. The fixed seat 10 adopts traditional metal materials. The second spring 9 is sleeved with the conical structure below the vacuum valve 13, and the lower end of the second spring 9 is clamped in the second clamping groove 203. The vacuum valve 13 of this structure can guide the gas through the conical structures at the upper and lower ends, and guide the intake and exhaust respectively. The second spring 9 elastically supports the vacuum valve 13, so that the vacuum valve 13 can be closed more tightly. The outside of the fixed seat 10 and the support seat 11 are both T-shaped structures, and a through hole 1001 is provided at the bottom of the fixed seat 10, and the support seat The bottom side of 11 is evenly spaced with air holes 1101, the first spring 8 is sleeved on the outside of the bottom of the fixing seat 10, and the first spring 8 is stuck on the upper inner side of the support seat 11, the vacuum valve 13 runs through the middle of the support seat 11, and the vacuum valve 13 is respectively provided with a conical structure inside and outside the support seat 11, the support seat 11 is an integrally injection-molded plastic part, and the lower part of the support seat 11 is in contact with the upper part of the conical structure below the vacuum valve 13. This structure makes the overall mass of the support seat 11 lighter, avoids causing pushing resistance, and allows the refueling lock cover body 1 to perform exhaust processing more quickly, and a positioning ring 4 is provided on the movable sleeve of the screw cap 3, and one end of the positioning ring 4 is connected to an elastic connector 5, and the other end of the elastic connector 5 is penetrated and fixed with a positioning member 6,This structure can decorate the outer side of the lock cover connector 2 by screwing the cover 3, and it is easy to rotate the lock cover connector 2. The positioning member 6 is used for the overall fixing of the fuel lock cover body 1. When the screwing cover 3 is rotated, the positioning ring 4 can be prevented from being twisted. At the same time, the fuel lock cover body 1 can be stretched by the elastic connector 5 to prevent the fuel lock cover body 1 from being lost.

[0021] Working principle: When using the refueling lock cover, first, the second spring 9 is engaged in the lock cover connector 2 through the positioning activity of the second card slot 203, and then the rubber vacuum valve 13 is penetrated into the plastic support seat 11, and the sealing gasket 12 is sleeved and fixed on the outer ring below the support seat 11. The support seat 11 is placed in the lock cover connector 2, and the conical structure at the bottom of the vacuum valve 13 is inserted into the second spring 9, and the sealing gasket 12 is supported on the first card slot 202. Then, the first spring 8 is placed on the upper inner side of the support seat 11, and then the fixing seat 10 is inserted between the card seat 201, so that the fixing seat 10 fixes the first spring 8 and the lower part, and the air vent 1101 is connected with the through hole 1001 for air inlet and outlet. The refueling lock cover body 1 is installed at the refueling port, and the lock cover connector 2 is tightened to the fuel tank port through the threaded structure, and the fastening ring 7 is used for sealing. When the inner side of the refueling lock cover body 1 is under positive pressure, the internal gas pushes the support seat 11 and the sealing gasket 12 to move, so that the contact part of the sealing gasket 12 and the second card groove 203 are separated to realize exhaust. When the inner side of the refueling lock cover body 1 is under negative pressure, the external air pressure reaches between the support seat 11 and the vacuum valve 13 from the air vent 1101, and the negative pressure suction treatment is realized through the elastic force of the vacuum valve 13 itself, thereby completing a series of work.

[0022] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fuel lock cap, comprising a fuel lock cap body (1), characterized in that: The refueling lock cover body (1) is provided with a lock cover connector (2) and a screw cover (3) that are fixed by clamping, and the lock cover connector (2) is provided with a fixing seat (10), a first spring (8), a support seat (11), a sealing gasket (12), a vacuum valve (13) and a second spring (9) in sequence from top to bottom. The outsides of the fixing seat (10) and the support seat (11) are both T-shaped structures, and the bottom of the fixing seat (10) is provided with a through hole (1001), and the bottom side of the support seat (11) is evenly spaced with air holes (1101), the first spring (8) is sleeved on the outside of the bottom of the fixing seat (10), and the first spring (8) is clamped on the upper inner side of the support seat (11), the vacuum valve (13) penetrates the middle of the support seat (11), and the vacuum valve (13) is provided with a conical structure inside and outside the support seat (11).

2. A fuel lock cap according to claim 1, characterized in that: The lock cover connector (2) is an integrally injection-molded plastic part, and a fastening ring (7) with a C-shaped cross-section is sleeved on the upper end of the outer side of the lock cover connector (2), and the outer side of the lock cover connector (2) is a threaded structure.

3. The fuel lock cap according to claim 1, characterized in that: The inner bottom of the lock cover connecting body (2) is provided with a circle of second slots (203), and the outer circle of the lock cover connecting body (2) above the second slots (203) is further provided with a circle of first slots (202), the sealing gasket (12) is arranged above the first slots (202), and the sealing gasket (12) is sleeved on the lower part of the T-shaped structure of the support seat (11), and the sealing gasket (12) and the vacuum valve (13) are both made of rubber material.

4. A fuel lock cap according to claim 3, characterized in that: The lock cover connecting body (2) is also provided with evenly spaced integrally structured clamping seats (201) above the second clamping slot (203), and the fixing seat (10) is tightly clamped between the clamping seats (201) above.

5. The fuel lock cap according to claim 3, characterized in that: The second spring (9) is sleeved and matched with the conical structure below the vacuum valve (13), and the lower end of the second spring (9) is clamped in the second clamping groove (203).

6. The fuel lock cap according to claim 1, characterized in that: A positioning ring (4) is provided on the movable sleeve of the screw cap (3), one end of the positioning ring (4) is connected to an elastic connecting piece (5), and the other end of the elastic connecting piece (5) is penetrated and fixed with a positioning piece (6).

7. The fuel lock cap according to claim 1, characterized in that: The support seat (11) is an integrally injection-molded plastic part, and the lower part of the support seat (11) is arranged in contact with the upper part of the conical structure below the vacuum valve (13).

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