Cover-free refueling system with pressure control function

Abstract

The utility model relates to the technical field of automobile refueling systems, in particular to a cover-free refueling system with a pressure control function, which comprises a refueling channel main body, the refueling channel main body is fixedly arranged in a refueling pipeline, a first elastic sheet is arranged on the refueling channel main body at an automobile refueling port, and the first elastic sheet and a first torsional spring are arranged on a support rod; the first torsional spring drives the first elastic piece to be sealed on the inner side of the refueling channel body, the axis of the first torsional spring is perpendicular to the axis of the refueling port of the refueling channel body, a second elastic piece is arranged at the end, close to the connecting oil tank, of the refueling channel body and connected with a second torsional spring, and the other side of the second torsional spring is communicated with the refueling channel body. The axis of the second torsional spring is perpendicular to the axis, close to the refueling channel body, of the refueling channel body, the second elastic piece is connected with a pressure control clamping structure, and the effects of simplifying refueling operation and reducing the cost of a refueling system are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of automobile refueling systems, and in particular to a capless refueling system with a pressure control function. Background Art

[0002] Cars have now become a means of transportation for every household. Cars are divided into pure oil cars, hybrid cars and new energy cars. Both pure oil cars and hybrid cars require fuel as power fuel. Therefore, pure oil cars and hybrid cars need to be refueled regularly.

[0003] Existing hybrid vehicles are equipped with a refueling system, which generally uses a cap and an electronically controlled fuel tank door. When refueling is required, the fuel tank isolation valve (FTIV) on the fuel tank opens to release the tank pressure to prevent excessive pressure in the tank from causing gasoline to spray out of the fuel port during refueling, causing user dissatisfaction and possibly causing safety risks. When the internal pressure is reduced, the electronically controlled door opens and the fuel tank cap is removed for refueling.

[0004] The above-mentioned existing technical solutions have the following defects: the existing refueling system requires the use of an electric door and a cover, which not only makes the refueling operation more troublesome, but also for commercial vehicles such as light trucks, additional parts such as vehicle side panels and electric doors are required, which is costly.

[0005] The invention can also be used in pure oil-powered vehicles. Summary of the invention

[0006] In order to simplify the refueling operation and reduce the cost of the refueling system, the present application provides a capless refueling system with a pressure control function.

[0007] The above technical objectives of this application are achieved through the following technical solutions:

[0008] A capless refueling system with a pressure control function comprises a refueling channel body, which is fixedly arranged in a refueling pipeline, and one end of the refueling channel body is located at the refueling port of an automobile, and one end of the refueling channel body is connected to a fuel tank, a first elastic sheet is arranged at the refueling channel body at the refueling port of the automobile, the first elastic sheet is connected to a first torsion spring, the other side of the first torsion spring is connected to the refueling channel body, the axis of the first torsion spring is perpendicular to the axis of the refueling channel body at the refueling port, a second elastic sheet is arranged at one end of the refueling channel body near the connection to the fuel tank, the second elastic sheet is connected to a second torsion spring, the other side of the second torsion spring is connected to the refueling channel body, the axis of the second torsion spring is perpendicular to the axis of the refueling channel body near the refueling channel body, the second elastic sheet is connected to a pressure control clamping structure, and when the air pressure in the fuel tank is too high, the pressure control clamping structure prevents the second elastic sheet from opening.

[0009] By adopting the above scheme, when refueling is needed, the refueling gun is inserted into the main body of the refueling channel. When the refueling gun touches the first spring, the first spring rotates along the axis direction of the first torsion spring, so that the refueling gun can be smoothly inserted. At this time, the first torsion spring is in a compressed state; when the refueling gun is inserted into the second spring, when the gas pressure in the fuel tank is too high, the pressure control clamping structure jams the second spring, so that the refueling gun cannot be inserted into the fuel tank. When the pressure in the fuel tank is reduced, the pressure control clamping structure of the gas in the fuel tank releases the jamming of the second spring, so that the refueling gun can be fully inserted into the main body of the refueling gun channel. At the same time, the second torsion spring is compressed, and then the refueling gun refuels into the main body of the refueling channel, and the oil enters the fuel tank along the pipeline. After refueling is completed, the refueling gun is taken out, and the first torsion spring and the second torsion spring rebound, so that the first spring and the second spring are closed. In this process, there is no need to disassemble the refueling cap when refueling, which makes refueling of the car more convenient. At the same time, the electric control door is removed, reducing the cost of automobile production.

[0010] Optionally, a compression sealing ring is fixedly disposed inside the refueling channel body, the compression sealing ring is disposed between the first elastic sheet and the second elastic sheet, an extension sealing ring is disposed inside the compression sealing ring, and when the refueling gun passes through the extension sealing ring, the extension sealing ring is compressed to fill the gap between the extension compression sealing ring and the refueling gun.

[0011] By adopting the above technical solution, when the refueling gun passes through the extended sealing ring, the refueling gun and the extended sealing ring are interference fit. When refueling, the extended sealing ring prevents the gas in the fuel tank from evaporating and flowing out from the refueling port, thereby reducing pollution to the environment. At the same time, the extended sealing ring can also withstand some pressure, so that refueling can be carried out even when the air pressure in the fuel tank has not been completely reduced to the normal value, thereby reducing the time users wait for refueling.

[0012] Optionally, the pressure control card-connecting structure includes an elastic diaphragm and a latch, an air pressure control chamber is opened inside the second elastic sheet, and an air vent connecting the air pressure control chamber and the oil tank is opened on the side of the second elastic sheet close to the oil tank, the elastic diaphragm is arranged in the air pressure control chamber, and the elastic diaphragm divides the air pressure control chamber into a pressure chamber and an external chamber, a through hole is opened on the circumferential surface of the second elastic sheet, the through hole connects the side of the second elastic sheet away from the oil tank with the external chamber, the latch is connected to the elastic diaphragm and the latch is slidably connected in the through hole, and a slot is opened in the refueling channel body opposite to the latch.

[0013] By adopting the above technical solution, when the air pressure in the fuel tank is too high, the elastic diaphragm protrudes toward the end that leads to the outer cavity, thereby driving the latch to slide toward the end away from the elastic diaphragm, so that the latch is inserted into the slot, thereby jamming the second spring sheet and preventing the refueling gun from passing through the second fuel tank cover.

[0014] Optionally, a clamping structure is provided in the second elastic piece, and when the pin is inserted into the slot, the clamping structure clamps the pin in the slot.

[0015] By adopting the above technical solution, the clamping structure further tightens the insertion of the latch into the slot, thereby preventing the second spring piece from being loosened and causing the second spring piece to open when the oil tank pressure is high.

[0016] Optionally, the clamping structure includes a push rod and a locking ball, the end of the pin has a smooth surface, a top groove is provided on the side of the pin close to the elastic diaphragm, the push rod is slidably connected in the top groove, and one end of the push rod is fixedly connected to the elastic diaphragm, a plurality of circular holes are provided on the circumferential surface of the top groove close to the bottom of the groove, a plurality of locking balls are provided, and the plurality of locking balls are respectively slidably connected in the circular holes, a clamping groove is provided at the end of the through groove away from the elastic diaphragm, the diameter of the clamping groove is larger than the diameter of the through hole, the pin is connected to a spring, and the other end of the spring is fixedly connected to the second spring sheet.

[0017] By adopting the above technical solution, when the pressure in the oil tank is too high, the elastic diaphragm protrudes toward the direction close to the outer cavity, driving the push rod to move toward the bottom of the top groove, so that the pin is inserted into the slot, and then the push rod moves the lock ball toward the outside of the insertion rod, so that the lock ball is engaged in the slot, thereby further locking the pin in the slot. When the pressure in the oil tank decreases, the push rod moves away from the bottom of the top groove, driving the pin to slide out of the slot, and at the same time retracting the lock ball into the circular hole. Since the end of the pin has a smooth surface, the insertion gun can open the second spring piece at this time.

[0018] Optionally, a pressure sealing ring for sealing is provided at the connection between the second elastic piece and the refueling channel body.

[0019] By adopting the above technical solution, the sealing performance of the second spring sheet when closed is enhanced, thereby preventing the gas in the fuel tank from entering the atmosphere at the fuel filling port and causing air pollution.

[0020] Optionally, the refueling channel body includes an upper shell and a lower shell, a fixed structure is arranged between the upper shell and the lower shell, the upper shell and the lower shell are connected by the fixed structure, the first elastic sheet is connected to the upper shell, and the second elastic sheet is connected to the lower shell.

[0021] By adopting the above technical solution, the installation of the refueling channel body is facilitated, and when the lower shell or the upper shell is damaged, only the corresponding parts need to be replaced, thereby reducing the maintenance cost of the refueling channel body.

[0022] Optionally, the fixing structure includes a card block and a card slot, and a plurality of card blocks are provided, and the plurality of card blocks are arranged on the inner surface of the upper shell body, and the card slot is opened on the inner side of the connection between the lower shell body and the upper shell body, and the card slot is L-shaped.

[0023] By adopting the above technical solution, the lower shell is inserted into the upper shell, the card block enters the card slot, and then the upper shell is rotated relative to the lower shell so that the card block reaches the deepest part of the card slot, thereby fixing the upper shell and the lower shell.

[0024] Optionally, an inner cavity sleeve is provided inside the lower shell body, and the inner cavity sleeve is provided between the first spring sheet and the second spring sheet. The inner side of the inner cavity sleeve is inclined. When the refueling gun is inserted into the lower shell body, the inner cavity sleeve guides the muzzle of the refueling gun to the second spring sheet shell body.

[0025] By adopting the above technical solution, the refueling gun can be more easily aligned with the second spring piece after passing through the first spring piece, thereby making it easier for the operator to refuel.

[0026] In summary, this application has the following technical effects:

[0027] 1. By arranging the first spring sheet and the second spring sheet in the main body of the refueling channel, and the second spring sheet is connected with a pressure control clamping structure, the refueling operation is simplified, and the electric control door is removed, thereby reducing the cost of the refueling system;

[0028] 2. By providing an elastic diaphragm and a latch, when the pressure in the oil tank is too high, the pressure in the oil tank squeezes the elastic diaphragm to drive the latch to engage in the slot, thereby engaging the second elastic sheet;

[0029] 3. By providing a pressure sealing ring, the sealing effect of the second spring piece is further enhanced, thereby further preventing gasoline from escaping from the fuel filling port during refueling. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of this application;

[0031] Figure 2 This is a partial structural exploded view of the main body of the refueling channel of the present application;

[0032] Figure 3 It is a partial structural schematic diagram of the first spring piece of the present application;

[0033] Figure 4 It is a partial structural schematic diagram of the second spring piece of the present application;

[0034] Figure 5 This is a partial structural cross-sectional view of the present application when the gas pressure in the fuel tank is too high;

[0035] Figure 6 It is a partial structural cross-sectional view of the present application when the air pressure in the fuel tank is normal.

[0036] In the figure, 1, the refueling channel body; 11, the upper shell; 111, the card block; 12, the lower shell; 121, the slot; 122, the card slot; 2, the first spring piece; 21, the cover sealing ring; 3, the first torsion spring; 31, the first shaft rod; 4, the second spring piece; 41, the vent; 42, the air pressure control chamber; 421, the pressure chamber; 422, the external chamber; 43, the through hole; 431, the card slot; 44, the pressure sealing ring; 5, the second torsion spring; 51, the second shaft rod; 6, the pressure control card connection structure; 61, the elastic diaphragm; 62, the push rod; 63, the latch; 631, the top slot; 632, the lock ball; 633, the spring; 7, the compression sealing ring; 71, the extension sealing ring; 8, the inner cavity bushing. DETAILED DESCRIPTION

[0037] The present application is further described in detail below in conjunction with the accompanying drawings.

[0038] Reference Figure 1 A capless refueling system with a pressure control function comprises a refueling channel body 1, which is arranged in a refueling pipe, one end of the refueling channel body 1 is located at the refueling port of the refueling pipe, and a first elastic piece 2 is arranged at this end of the refueling channel body 1, the first elastic piece 2 is connected to a first torsion spring 3, the first torsion spring 3 is connected to the refueling channel body 1, the end of the refueling channel body 1 away from the refueling port is connected to the fuel tank, and a second elastic piece 4 is arranged at the end of the refueling channel body 1 connected to the fuel tank, the second elastic piece 4 is connected to a second torsion spring 5, the second torsion spring 5 is connected to the refueling channel body 1, and the second elastic piece 4 is connected to a pressure control clamping structure 6. When refueling is needed, the operator inserts the refueling gun from the refueling port of the car, and the refueling gun contacts the first spring 2 to open the first spring 2, and at the same time the first torsion spring 3 is compressed, and then the refueling gun reaches the second spring 4. At this time, if the pressure in the fuel tank is too high, the pressure control clamping structure 6 will jam the second spring 4 to prevent the refueling gun from continuing to enter. When the pressure in the fuel tank is reduced, the pressure control clamping structure 6 opens, allowing the refueling gun to open the second spring 4, and at the same time the second torsion spring 5 is compressed. Then the refueling gun is used to refuel the fuel tank. After the oil is added, the refueling gun is taken out, the first torsion spring 3 and the second torsion spring 5 rebound, and the first spring 2 and the second spring 4 are closed to prevent the oil from escaping from the refueling port.

[0039] Reference Figure 1 and Figure 2The refueling channel body 1 includes an upper shell 11 and a lower shell 12. A plurality of blocks 111 are arranged on the inner surface of one end of the upper shell 11. The plurality of blocks 111 are located on the same plane perpendicular to the axial direction of the upper shell 11. A number of engaging grooves 122 equal to the number of the blocks 111 are provided on the outer edge of one end of the lower shell 12. The engaging grooves 122 are L-shaped. The lower shell 12 is inserted into the upper shell 11 so that the blocks 111 penetrate into the engaging grooves 122. Then, the upper shell 11 and the lower shell 12 are relatively rotated so that the blocks 111 are located at the deepest part of the engaging grooves 122, thereby fixing the upper shell 11 and the lower shell 12. Dividing the refueling channel body 1 into the upper shell 11 and the lower shell 12 makes it more convenient to install the refueling channel body 1. At the same time, when the upper shell 11 or the lower shell 12 is damaged, the corresponding parts can be replaced, thereby reducing the cost of repairing the refueling system.

[0040] Reference Figure 1 and Figure 3 The first spring piece 2 is arranged in the upper shell 11, the first spring piece 2 is fixedly connected to the first torsion spring 3, a first shaft rod 31 is arranged in the middle of the first torsion spring 3, both ends of the first shaft rod 31 are fixedly connected to the upper shell 11, and a cover sealing ring 21 is provided on the circumferential surface of the first spring piece 2 to make the sealing effect of the first spring piece 2 tighter.

[0041] Reference Figure 1 An inner cavity sleeve 8 is arranged between the first spring piece 2 and the second spring piece 4. The inner surface of the inner cavity sleeve 8 is an inclined surface. When the muzzle of the refueling gun contacts the inner cavity sleeve 8, the muzzle of the refueling gun can reach the second spring piece 4 along the inclined surface of the inner cavity sleeve 8, so that the operator can more conveniently aim the refueling gun at the second spring piece 4 when refueling, thereby making refueling more convenient.

[0042] Reference Figure 1 A compression seal ring 7 is arranged between the inner cavity bushing 8 and the second elastic sheet 4. The compression seal ring 7 is fixed to the lower shell 12, and an extension seal ring 71 is arranged on the inner surface of the compression seal ring 7. The extension seal ring 71 is thinner than the compression seal ring 7. When the refueling gun passes through the extension seal ring 71, the extension seal ring 71 is compressed and deformed due to its own elasticity, thereby filling the gap between the extension compression seal ring 7 and the refueling gun, thereby achieving a sealing effect. The extension seal ring 71 and the compression seal ring 7 can make the refueling gun seal when refueling, reducing the overflow of gasoline in the fuel tank at the tank port. At the same time, the extension seal ring 71 has a certain pressure resistance. Even if the air pressure in the fuel tank is higher than the external air pressure, the extension seal ring 71 can ensure the sealing of the fuel tank, so that the air pressure in the fuel tank does not need to be reduced to the same as the external atmospheric pressure before refueling, reducing the time for users to wait for decompression.

[0043] Reference Figure 1 and Figure 4The second spring piece 4 is arranged inside the lower housing 12, the second spring piece 4 is fixedly connected to the second torsion spring 5, a second shaft 51 is arranged inside the second torsion spring 5, the second shaft 51 is rotatably connected to the inner housing, and the second torsion spring 5 is sleeved on the outside of the second shaft cover. A pressure sealing ring 44 is sleeved on the outside of the second spring piece 4 to make the sealing effect of the second spring piece 4 better.

[0044] Reference Figure 5 and Figure 6 A vent 41 is provided on the side of the second spring piece 4 close to the oil tank, and an air pressure control chamber 42 is provided inside the second spring piece 4. The vent 41 connects the air pressure control chamber 42 with the oil tank. The pressure control clamping structure 6 includes an elastic diaphragm 61, which is arranged in the air pressure control chamber 42. The elastic diaphragm 61 divides the air pressure control chamber 42 into a pressure chamber 421 and an external chamber 422. The pressure chamber 421 is connected with the oil tank. A through hole 43 is provided on the outer circumferential surface of the second spring piece 4. The through hole 43 connects the external chamber 422 with the side of the second spring piece 4 away from the oil tank. A latch 63 is slidably connected in the through hole 43, and the end of the latch is a smooth surface. A slot 121 is provided in the lower shell 12 facing the latch 63, and a top groove 631 is provided on the side of the latch 63 close to the external chamber 422. A push rod 62 slides in the top groove 631, and the end of the push rod 62 away from the top groove 631 is fixedly connected to the elastic diaphragm 61. A plurality of through circular holes are provided on the circumferential surface of the top groove 631 near the groove bottom, and a locking ball 632 slides in the circular hole, and a clamping groove 431 is provided on the side of the through hole 43 away from the through-outer cavity 422, and the diameter of the clamping groove 431 is larger than the diameter of the through hole 43. A spring 633 is provided on the outside of the latch 63, one end of the spring 633 is fixedly connected to the latch 63, and the other end of the spring 633 is fixedly connected to the second elastic sheet 4. The spring 633 will push the latch 63 into the slot 121 in a natural state. When the pressure in the oil tank is too high, the elastic diaphragm 61 protrudes toward the through-outer cavity 422, thereby driving the push rod 62 to move toward the bottom of the top groove 631, and then the push rod 62 pushes the locking ball 632 toward the outside of the latch 63, so that the locking ball 632 is stuck in the clamping groove 431, so that the latch 63 is fixed in the slot 121, and the second elastic sheet 4 is fixed, so that the fuel gun cannot be inserted into the oil tank. When the pressure in the oil tank decreases, the elastic diaphragm 61 returns to its original state, causing the push rod 62 to return to its original position, driving the locking ball 632 to retract. When the gun is inserted, the latch 63 compresses the spring 633 and slides out of the slot 121, allowing normal refueling.

[0045] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A capless refueling system with pressure control function, characterized in that: The invention comprises a refueling channel body (1), wherein the refueling channel is fixedly arranged in a refueling pipeline, and one end of the refueling channel body (1) is located at the refueling port of the automobile, and one end of the refueling channel body (1) is connected to the fuel tank. A first elastic sheet (2) is arranged at the refueling port of the automobile, and the first elastic sheet (2) is connected to a first torsion spring (3). The other side of the first torsion spring (3) is connected to the refueling channel body (1), and the axis of the first torsion spring (3) is perpendicular to the axis of the refueling channel body (1) at the refueling port. A second elastic sheet (4) is arranged at one end of the refueling channel body (1) near the fuel tank, and the second elastic sheet (4) is connected to a second torsion spring (5). The other side of the second torsion spring (5) is connected to the refueling channel body (1), and the axis of the second torsion spring (5) is perpendicular to the axis of the refueling channel body (1) near the refueling channel body (1). The second elastic sheet (4) is connected to a pressure control clamping structure (6). When the air pressure in the fuel tank is too high, the pressure control clamping structure (6) prevents the second elastic sheet (4) from opening.

2. A capless refueling system with pressure control function according to claim 1, characterized in that: A compression seal ring (7) is fixedly arranged inside the refueling channel body (1), and the compression seal ring (7) is arranged between the first elastic sheet (2) and the second elastic sheet (4). An extension seal ring (71) is arranged inside the compression seal ring (7). When the refueling gun passes through the extension seal ring (71), the extension seal ring (71) is compressed to fill the gap between the compression seal ring (7) and the refueling gun.

3. A capless refueling system with pressure control function according to claim 1, characterized in that: The pressure control clamping structure (6) comprises an elastic diaphragm (61) and a latch (63). An air pressure control chamber (42) is provided inside the second elastic sheet (4). A vent (41) connecting the air pressure control chamber (42) and the oil tank is provided on the side of the second elastic sheet (4) close to the oil tank. The elastic diaphragm (61) is arranged in the air pressure control chamber (42). The elastic diaphragm (61) divides the air pressure control chamber (42) into a pressure chamber (421) and an external chamber (422). A through hole (43) is provided on the circumferential surface of the second elastic sheet (4). The through hole (43) connects the side of the second elastic sheet (4) away from the oil tank. The latch (63) is connected to the elastic diaphragm (61) and the latch (63) is slidably connected in the through hole (43). A slot (121) is provided on the fueling channel body (1) directly opposite to the latch (63).

4. A capless refueling system with pressure control function according to claim 3, characterized in that: A clamping structure is provided in the second elastic piece (4), and when the latch (63) is inserted into the slot (121), the clamping structure clamps the latch (63) in the slot (121).

5. A capless refueling system with pressure control function according to claim 4, characterized in that: The clamping structure comprises a push rod (62) and a locking ball (632). The end of the plug (63) is a smooth surface. A top groove (631) is provided on the side of the plug (63) close to the elastic diaphragm (61). The push rod (62) is slidably connected in the top groove (631), and one end of the push rod (62) is fixedly connected to the elastic diaphragm (61). A plurality of circular holes are provided on the circumferential surface of the top groove (631) close to the bottom of the groove. A plurality of locking balls (632) are provided. The plurality of locking balls (632) are respectively slidably connected in the circular holes. A clamping groove (431) is provided at the end of the through groove away from the elastic diaphragm (61). The diameter of the clamping groove (431) is larger than the diameter of the through hole (43). The plug (63) is connected to a spring (633). The other end of the spring (633) is fixedly connected to the second spring sheet (4).

6. A capless refueling system with pressure control function according to claim 1, characterized in that: A pressure sealing ring (44) for sealing is provided at the connection between the second elastic piece (4) and the refueling channel body (1).

7. A capless refueling system with pressure control function according to claim 1, characterized in that: The refueling channel body (1) comprises an upper shell (11) and a lower shell (12), a fixing structure is arranged between the upper shell (11) and the lower shell (12), the upper shell (11) and the lower shell (12) are connected via the fixing structure, a first elastic sheet (2) is connected to the upper shell (11), and a second elastic sheet (4) is connected to the lower shell (12).

8. A capless refueling system with pressure control function according to claim 7, characterized in that: The fixing structure comprises a clamping block (111) and a clamping groove (122); a plurality of clamping blocks (111) are provided, the plurality of clamping blocks (111) are provided on the inner surface of the upper shell (11); the clamping groove (122) is provided on the inner side of the connection between the lower shell (12) and the upper shell (11), and the clamping groove (122) is L-shaped.

9. A capless refueling system with pressure control function according to claim 8, characterized in that: An inner cavity bushing (8) is arranged inside the lower shell (12), and the inner cavity bushing (8) is arranged between the first spring sheet (2) and the second spring sheet (4). The inner side of the inner cavity bushing (8) is in the shape of an inclined surface. When the refueling gun is inserted into the lower shell (12), the inner cavity bushing (8) guides the muzzle of the refueling gun to the shell of the second spring sheet (4).

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