A mechanical sealing device for automobile fuel tank

Abstract

The present invention relates to the technical field of automobile fuel tanks, and specifically discloses a mechanical sealing device for automobile fuel tanks, comprising a connector connected to the automobile fuel tank and a sealing assembly rotatably connected to the connector for closing the connector, the sealing assembly comprising a fixed block fixedly connected to one side of the connector, a rotating shaft arranged in the fixed block, a steering member cooperating with the rotating shaft for changing the steering direction, a first sealing body connected to the rotating shaft, and a second sealing body connected to the steering member, the steering directions of the first sealing body and the second sealing body are opposite, a mounting body is symmetrically fixedly connected to the bottom of the connector, a connecting rod is symmetrically fixedly connected to the position of the first sealing body corresponding to the mounting body, an arc rod is provided between the connecting rod and the mounting body, a movable plate connected to the arc rod is provided on the mounting body, a traction rope is fixedly connected to one side of the movable plate, the traction rope is routed through the mounting body to the inner wall of the connector, an annular groove is provided on the inner wall of the connector, and the device solves the problem of poor sealing effect of traditional fuel tank covers.

Description

Technical Field

[0001] The present application relates to the technical field of automobile fuel tanks, and specifically discloses a mechanical sealing device for automobile fuel tanks. Background Art

[0002] The fuel tank consists of a fuel tank cap, a partition, a fuel gauge sensor, and a fuel filler port. The most commonly used fuel tank materials are metal materials (steel plates and aluminum alloys), and the surface is treated with anti-corrosion, rust-proof, and impact-resistant treatments (with added cushioning rubber). The fuel tank is roughly divided into: the fuel tank body, the fuel pump, the fuel pipe, etc. The function of the fuel tank cap: The fuel tank cap is usually designed in a claw shape, and is clamped with a rubber gasket compressed by a corrugated steel leaf spring to ensure sealing. Some tank caps are designed with a locking device to prevent falling off or losing. The function of the partition: There are usually partitions in fuel tanks. The function of the partition is to separate the oil return area and the oil suction area of the pump, increase the oil circulation path, reduce the oil circulation speed, and help cool and dissipate heat, and precipitate bubbles and impurities. The function of the gas meter sensor: The sliding rheostat, float, and sliding rheostat are installed in the fuel tank and linked with the oil level float to form a small assembly, which is connected to the gas meter to indicate the amount of fuel in the tank. The function of the fuel filler port: The function of the fuel filler port filter is to filter large impurities in the fuel;

[0003] According to the different fuels, fuel tanks can be divided into gasoline tanks and diesel tanks; according to the different structures, fuel tanks can be divided into bite-type fuel tanks, aluminum alloy fuel tanks, CO2 welded fuel tanks, upper and lower docking fuel tanks, and two-end seam welded fuel tanks;

[0004] Most automobile fuel tanks are made of thin steel plate stampings welded together. In recent years, metal fuel tanks have been gradually replaced by plastic fuel tanks. The upper part is equipped with a fuel gauge sensor, fuel inlet and return ports, fuel filler port, heater fuel outlet, vent, and fuel tank cap.

[0005] Generally speaking, as for the fuel tank body, most fuel tanks are welded. Therefore, there is no sealing defect in most fuel tanks. And with the existence of the existing technology of sealing ring, the sealing failure of the fuel tank body is basically non-existent.

[0006] However, as mentioned in the background art, in order to achieve refueling, the fuel tank must have a refueling port. In the prior art, one end of the refueling pipe is integrally welded to the fuel tank body, and the other end of the refueling pipe is sealed by a tank cap.

[0007] In current technology, most tank caps are connected to the fuel filler pipe using threaded or clip-on connections and then fitted with a sealing gasket to seal the fuel filler pipe. This approach may not pose any problems in the short term, but over time and with use, the sealing effect of the tank cap will decrease due to frequency of use.

[0008] In addition, the new generation of fuel will add ethanol, which has poor sealing effect and will quickly cause the ethanol to evaporate. Most companies have not noticed this problem. In view of this, the inventor proposed a mechanical sealing device for automobile fuel tanks, specifically: a tank cover suitable for the oil inlet of the tank. Summary of the Invention

[0009] The purpose of the present invention is to solve the problem of poor sealing effect of a traditional fuel tank cover.

[0010] In order to achieve the above object, the present invention provides the following basic scheme:

[0011] A mechanical sealing device for an automobile fuel tank comprises a connector connected to the automobile fuel tank and a sealing assembly rotatably connected to the connector for sealing the connector;

[0012] The sealing assembly includes a fixed block fixed to one side of the connecting body, a rotating shaft disposed in the fixed block, a steering member cooperating with the rotating shaft for changing the direction of rotation, a first sealing body connected to the rotating shaft, and a second sealing body connected to the steering member, wherein the first sealing body and the second sealing body have opposite directions of rotation;

[0013] The bottom of the connector is symmetrically fixed with a mounting body, the first sealing body is symmetrically fixed with a connecting rod at a position corresponding to the mounting body, an arc-shaped rod is provided between the connecting rod and the mounting body, a movable plate connected to the arc-shaped rod is provided on the mounting body, a traction rope is fixed to one side of the movable plate, and the traction rope is routed through the mounting body to the inner wall of the connector;

[0014] An annular groove is formed on the inner wall of the connector, a sealing gasket is slidably connected in the annular groove, and the traction rope is installed on the inner side of the sealing gasket.

[0015] The principles and effects of this basic solution are:

[0016] 1. Compared with the prior art, the present device makes creative improvements in sealing, and provides a first sealing body and a second sealing body, and utilizes a steering member to turn the first sealing body and the second sealing body in opposite directions, so that the first sealing body opens outward, and at the same time, the second sealing body opens inward. Similarly, the first sealing body closes inward, and the second sealing body closes inward. When the first sealing body is closed inward, the present device has double sealing protection, the first sealing body realizes protection on the outside, and the second sealing body realizes protection on the inside. Under the double sealing protection effect, the problem of poor sealing effect of the traditional fuel tank cover is solved.

[0017] 2. Compared with the prior art, the present invention not only has double protection, but also has a high sealing effect. The bottom of the connector is symmetrically fixed with a mounting body, and the first sealing body is symmetrically fixed with a connecting rod corresponding to the position of the mounting body. An arc-shaped rod is provided between the connecting rod and the mounting body, and a movable plate connected to the arc-shaped rod is provided on the mounting body. A traction rope is fixed on one side of the movable plate, and the traction rope is routed through the mounting body to the inner wall of the connector. The movable plate is arranged lower. When the first sealing body is opened outward, the traction rope recovers from the compressed state to the reset state, and the sealing gasket at this time will not be affected by the force of the traction rope and will be located in the annular groove. When the first sealing body is closed inward, the arc-shaped rod moves downward, causing the movable plate to move downward all the time, and the traction rope will move with it, causing the traction rope to start to tighten. The locked traction rope acts on the sealing gasket, causing the sealing gasket to exceed the annular groove, causing the ring diameter of the traction rope to change, causing the sealing gasket to be squeezed out of the annular groove, and the outer diameter of the cover body and the inner diameter of the connector are matched to achieve a high seal.

[0018] Furthermore, a first rotating gear is sleeved on the rotating shaft, the steering member and the fixed block are integrally formed, a steering shaft is provided inside the steering member, a second rotating gear meshing with the first rotating gear is provided on the steering shaft, and the steering shaft is connected to the second sealing body.

[0019] Furthermore, the first sealing body includes a cover body used in conjunction with the connecting body, a switch assembly installed on the outside of the cover body, and a clamping assembly installed on the inside of the cover body, the clamping assembly includes a clamping block fixed to the cover body and a clamping key sliding with the clamping block, the switch assembly includes a detachable protective plate, a sliding rod located on the inner side of the protective plate, and a reset spring installed on one side of the sliding rod, the free end of the sliding rod passes through the cover body and is connected to the clamping key, and the clamping key changes its position through the reset spring and is clamped to the bottom side of the connecting body.

[0020] Furthermore, the connecting body is circular, a mounting screw is provided on the connecting body, and the first sealing body has the same shape as the connecting body.

[0021] Furthermore, the second sealing body is in the shape of a flat plate, and a mounting gap is left between the second sealing body and the inner diameter of the connecting body. The mounting gap is used for the subsequent installation of a sensor for the automobile fuel tank.

[0022] Furthermore, the outer diameter of the cover body fits the inner diameter of the connector.

[0023] Furthermore, the traction rope is provided with a plurality of pillars, and the free ends of the pillars are connected to the sealing gasket. When the traction rope contracts, the ring diameter of the traction rope changes, so that the sealing gasket is squeezed out from the annular groove, and the outer diameter of the cover body and the inner diameter of the connector are matched to achieve high sealing.

[0024] Furthermore, a stepped protrusion is provided between the clamping assembly and the cover body, and a rubber sealing ring is provided on the outer periphery of the protrusion, and the rubber sealing ring is in the shape of a spiral ring.

[0025] Furthermore, one side of the connection between the locking key and the connector is provided with an inclination angle of 45°.

[0026] Furthermore, the protection plate is clamped on the cover body, and the protection plate is provided with anti-slip grooves, which are mesh anti-slip grooves. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A schematic structural diagram of a mechanical sealing device for an automobile fuel tank proposed in an embodiment of the present application is shown;

[0029] Figure 2 A side view of a mechanical sealing device for an automobile fuel tank proposed in an embodiment of the present application is shown;

[0030] Figure 3 A bottom view of a mechanical sealing device for an automobile fuel tank proposed in an embodiment of the present application is shown;

[0031] Figure 4 The present invention shows a mechanical sealing device for automobile fuel tanks. Figure 3 Specific installation diagram of Part A in the figure;

[0032] Figure 5 A schematic side view of a mechanical sealing device for an automobile fuel tank according to an embodiment of the present application is shown from another perspective;

[0033] Figure 6 A partial structural diagram of a mechanical sealing device for an automobile fuel tank proposed in an embodiment of the present application is shown;

[0034] Figure 7 A partial structural diagram of a mechanical sealing device for an automobile fuel tank according to an embodiment of the present application is shown from another angle;

[0035] Figure 8 A partial structural diagram of a mechanical sealing device for an automobile fuel tank proposed in an embodiment of the present application is shown;

[0036] Figure 9A schematic diagram of the installation position structure of a sealing gasket in a mechanical sealing device for an automobile fuel tank proposed in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0037] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0038] The figure marks in the drawings of the specification include: connecting body 1, mounting screw 2, snap-on block 3, cover body 4, second sealing body 5, connecting rod 6, arc rod 7, fixed block 8, rotating shaft 9, fixed block 10, steering shaft 11, first rotating gear 12, second rotating gear 13, protective shell 14, sliding rod 15, return spring 16, snap-on key 17, sealing gasket 18, movable plate 19, traction rope 20, mounting body 21, pillar 22.

[0039] Implementation example Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 9 As shown:

[0040] A mechanical sealing device for an automobile fuel tank, comprising a connector 1 connected to the automobile fuel tank and a sealing assembly rotatably connected to the connector 1 for sealing the connector 1;

[0041] Regarding the connector 1, the connector 1 of this case is the same as the traditional mailbox cover connector 1, which is an arc-shaped ring. There are mounting screws 2 on all four sides of the connector 1. The purpose of the mounting screws 2 is to connect with the oil inlet position of the box body to better cooperate with the oil inlet.

[0042] Regarding the sealing assembly: The sealing assembly includes a fixed block 8 fixed to the bottom left side of the connector 1, a rotating shaft 9 disposed in the fixed block 8, a steering member cooperating with the rotating shaft 9 for changing the direction of rotation, a first sealing body connected to the rotating shaft 9, and a second sealing body 5 connected to the steering member. The first sealing body and the second sealing body 5 have opposite steering directions.

[0043] In this case, the steering components are used to achieve the different steering of the two. Specifically: Figure 1 and Figure 4 As shown, a first rotating gear 12 is sleeved on the rotating shaft 9, the steering member and the fixed block 8 are integrally formed, a steering shaft 11 is provided inside the steering member, and a second rotating gear 13 meshing with the first rotating gear 12 is provided on the steering shaft 11, and the steering shaft 11 is connected to the second sealing body 5.

[0044] Specifically: when the first sealing body rotates outward, the rotating shaft 9 rotates, the rotating shaft 9 drives the first rotating gear 12 to rotate, the first rotating gear 12 acts on the second rotating gear 13, so that the second rotating gear 13 rotates, the second rotating gear 13 acts on the steering shaft 11, so that the steering shaft 11 rotates, and the steering shaft 11 rotates, so that the second sealing body 5 rotates;

[0045] pass Figure 1 and Figure 2 It can be seen that when the first sealing body rotates outward, the second sealing body 5 opens inward, and vice versa;

[0046] Regarding the first sealing body and the second sealing body 5, the first sealing body and the second sealing body 5 are mainly used for sealing in this case to improve the sealing effect;

[0047] Specifically: the first sealing body includes a cover body 4 used in conjunction with the connector 1, the outer diameter of the cover body 4 fits the inner diameter of the connector 1, a switch assembly installed on the outside of the cover body 4 and a clamping assembly installed on the inside of the cover body 4, the clamping assembly includes a clamping block 3 fixed to the cover body 4 and a clamping key 17 sliding with the clamping block 3, the switch assembly includes a detachable protective plate, a sliding rod 15 located on the inner side of the protective plate and a reset spring 16 installed on the lower side of the sliding rod 15, the free end of the sliding rod 15 passes through the cover body 4 and is connected to the clamping key 17, and the clamping key 17 changes its position through the reset spring 16 and is clamped to the bottom side of the connector 1.

[0048] Specifically: In order to ensure the sealing effect of the first sealing body, the first sealing body and the connecting body 1 have the same shape, such as Figure 5 and Figure 6 As shown, when the first sealing body is closed inward, the protective plate is removed and the protective plate is snapped onto the cover body 4. The protective plate is provided with anti-slip grooves, which are mesh anti-slip grooves, exposing the sliding rod 15. The sliding rod 15 is manually controlled so that the sliding rod 15 drives the card key 17 to change the position relationship. When it reaches the right bottom of the connector 1, let go and the card key 17 will be stuck at the right bottom of the connector 1. In order to facilitate the snapping of the card key 17, one side of the connection between the card key 17 and the connector 1 has an inclination angle of 45°.

[0049] Specific: such as Figure 1 and Figure 2 and Figure 3 As shown, the second sealing body 5 is in the shape of a flat plate, and a mounting gap is left between the second sealing body 5 and the inner diameter of the connecting body 1. The mounting gap is used for the subsequent installation of a sensor for the automobile fuel tank.

[0050] like Figure 8As shown, the bottom of the connector 1 is symmetrically fixed with a mounting body 21, and the first sealing body is symmetrically fixed with a connecting rod 6 at a position corresponding to the mounting body 21. A curved rod 7 is provided between the connecting rod 6 and the mounting body 21. A movable plate 19 connected to the curved rod 7 is provided on the mounting body 21. A traction rope 20 is fixed to the outer side of the movable plate 19. The traction rope 20 is routed through the mounting body 21 to the inner wall of the connector 1;

[0051] like Figure 9 As shown, a plurality of pillars 22 are provided on the traction rope 20, and the free ends of the pillars 22 are connected to the sealing gasket 18. When the traction rope 20 contracts, the ring diameter of the traction rope 20 changes, so that the sealing gasket 18 is squeezed out from the annular groove, and the outer diameter of the cover body 4 and the inner diameter of the connector 1 are matched to achieve a high degree of sealing.

[0052] An annular groove is formed on the inner wall of the connector 1 , a sealing gasket 18 is slidably connected in the annular groove, and the traction rope 20 is installed on the inner side of the sealing gasket 18 .

[0053] Specifically: the setting of the movable plate 19 is based on the fact that the mounting body 21 is close to the bottom. When the first sealing body is opened outward, the traction rope 20 recovers from the compressed state to the reset state, realizing the rapid opening of the cover body 4. At this time, the sealing gasket 18 will not be affected by the force of the traction rope 20 and will be located in the annular groove. When the first sealing body is closed inward, the arc rod 7 moves downward, causing the movable plate 19 to move downward all the time, and at the same time, it will move with the traction rope 20, causing the traction rope 20 to start to tighten. The locked traction rope 20 acts on the sealing gasket 18, causing the sealing gasket 18 to exceed the annular groove, causing the ring diameter of the traction rope 20 to change, causing the sealing gasket 18 to be squeezed out of the annular groove, and cooperate with the outer diameter of the cover body 4 and the inner diameter of the connector 1 to achieve high sealing.

[0054] This case makes improvements on the cover body 4. A stepped protrusion is provided between the snap-fit assembly and the cover body 4. A rubber sealing ring is provided on the outer periphery of the protrusion. The rubber sealing ring is in the shape of a spiral ring. The sealing effect of the first sealing body is enhanced by the protrusion and the rubber sealing ring.

[0055] Specific implementation process:

[0056] About sealing:

[0057] When the first sealing body is opened, the second sealing body 5 opens inward; when the first sealing body is closed, the second sealing body 5 closes inward. Once the first sealing body is closed, the fuel inlet of the fuel tank has two layers of protection: the second sealing body 5 closest to the fuel tank and the first sealing body on the outermost side. Moreover, the double protection design will not affect refueling.

[0058] Secondly, this device not only has double protection, but also has a high sealing effect. When the first sealing body is opened outward, the traction rope 20 recovers from the compressed state to the reset state. At this time, the sealing gasket 18 will not be affected by the force of the traction rope 20 and will be located in the annular groove. When the first sealing body is closed inward, the arc rod 7 moves downward, causing the movable plate 19 to move downward all the time. While moving, it will move with the traction rope 20, causing the traction rope 20 to start to tighten. The locked traction rope 20 acts on the sealing gasket 18, causing the sealing gasket 18 to exceed the annular groove, causing the ring diameter of the traction rope 20 to change, causing the sealing gasket 18 to be squeezed out of the annular groove, and cooperate with the outer diameter of the cover body 4 and the inner diameter of the connector 1 to achieve high sealing.

[0059] The device solves the problem of poor sealing effect of the traditional fuel tank cover.

[0060] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A mechanical sealing device for an automobile fuel tank, characterized in that: It includes a connector connected to the automobile fuel tank and a sealing assembly rotatably connected to the connector for sealing the connector; The sealing assembly includes a fixed block fixed to one side of the connecting body, a rotating shaft disposed in the fixed block, a steering member cooperating with the rotating shaft for changing the direction of rotation, a first sealing body connected to the rotating shaft, and a second sealing body connected to the steering member, wherein the first sealing body and the second sealing body have opposite directions of rotation; The rotating shaft is sleeved with a first rotating gear, the steering member and the fixed block are integrally formed, a steering shaft is provided inside the steering member, the steering shaft is provided with a second rotating gear meshing with the first rotating gear, and the steering shaft is connected to the second sealing body; The bottom of the connector is symmetrically fixed with a mounting body, the first sealing body is symmetrically fixed with a connecting rod at a position corresponding to the mounting body, an arc-shaped rod is provided between the connecting rod and the mounting body, a movable plate connected to the arc-shaped rod is provided on the mounting body, a traction rope is fixed to one side of the movable plate, and the traction rope is routed through the mounting body to the inner wall of the connector; The inner wall of the connector is provided with an annular groove, a sealing gasket is slidably connected in the annular groove, the traction rope is installed on the inner side of the sealing gasket, the first sealing body includes a cover body used in conjunction with the connector, the outer diameter of the cover body fits the inner diameter of the connector, a plurality of pillars are provided on the traction rope, the free ends of the pillars are connected to the sealing gasket, when the traction rope contracts, the loop diameter of the traction rope changes, so that the sealing gasket is squeezed out of the annular groove, and the outer diameter of the cover body and the inner diameter of the connector are matched to achieve a high degree of sealing.

2. A mechanical sealing device for an automobile fuel tank according to claim 1, characterized in that: The first sealing body also includes a switch assembly installed on the outside of the cover body and a clamping assembly installed on the inside of the cover body. The clamping assembly includes a clamping block fixed to the cover body and a clamping key sliding with the clamping block. The switch assembly includes a detachable protective plate, a sliding rod located on the inner side of the protective plate, and a reset spring installed on one side of the sliding rod. The free end of the sliding rod passes through the cover body and is connected to the clamping key. The clamping key changes its position through the reset spring and is clamped to the bottom side of the connector.

3. A mechanical sealing device for an automobile fuel tank according to claim 1 or 2, characterized in that: The connecting body is circular and is provided with mounting screws. The first sealing body has the same shape as the connecting body.

4. A mechanical sealing device for an automobile fuel tank according to claim 3, characterized in that: The second sealing body is in the shape of a flat plate, and a mounting gap is left between the second sealing body and the inner diameter of the connecting body. The mounting gap is used for the subsequent installation of a sensor for the automobile fuel tank.

5. The mechanical sealing device for automobile fuel tank according to claim 4, characterized in that: A stepped protrusion is provided between the clamping assembly and the cover body, and a rubber sealing ring is provided on the outer periphery of the protrusion. The rubber sealing ring is in the shape of a spiral ring.

6. The mechanical sealing device for an automobile fuel tank according to claim 2, characterized in that: One side of the connection between the locking key and the connecting body is provided with an inclination angle of 45 degrees.

7. The mechanical sealing device for an automobile fuel tank according to claim 2, characterized in that: The protection plate is clamped on the cover body, and the protection plate is provided with anti-skid patterns, which are mesh-shaped anti-skid patterns.

Images