A method for tightening a fuel filler cap with a fuel filler sealing structure

Abstract

The present invention discloses a method for tightening a fuel filler cap with a fuel filler port sealing structure, comprising a fuel filler port, a fuel filler cap disposed at the fuel filler port, and a sealing ring disposed between the fuel filler port and the fuel filler cap. The fuel filler port comprises an outer fuel filler port and an inner fuel filler port integrally connected to the upper edge of the outer fuel filler port, the inner fuel filler port having a U-shaped axial cross-section, the sealing ring comprising a sealing ring disposed within the inner fuel filler port, the fuel filler cap being connected to the outer fuel filler port, a pressure spring disposed between the fuel filler cap and the sealing ring, the pressure spring applying sealing pressure to the sealing ring, and an adjusting gasket disposed between the fuel filler cap and the pressure spring. The present invention can maintain the sealing effect of the fuel filler port for a long time, has a simple structure, and facilitates the connection of the fuel filler cap.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts manufacturing, and in particular to a method for tightening a fuel filler cap of a fuel filler sealing structure. Background Art

[0002] As we know, the engine of a car needs to be equipped with a lubrication system, and for this purpose, a lubricating oil container needs to be provided. To facilitate the addition of lubricating oil, an oil filling port is usually provided on the lubricating oil container, and then a sealable oil filling port cap is provided on the oil filling port.

[0003] It is understandable that the oil filler cap is usually provided with a sealing ring to ensure the sealing effect of the oil filler cap and prevent the oil from leaking out.

[0004] However, existing oil filler port structures with effective sealing properties still suffer from the following technical drawbacks: First, the sealing ring is made of an elastic material. When the oil filler cap is tightened on the oil filler port, the sealing ring is squeezed to create a seal. However, over time, the elastic sealing ring will experience a certain degree of "creep." When this creep reaches a certain level, the sealing material will fail, allowing a small amount of oil to leak out.

[0005] In other words, the sealing effect of the oil cap will decrease as the use time increases. Summary of the Invention

[0006] The purpose of the present invention is to provide a method for tightening a fuel filler cap with a fuel filler cap sealing structure, which can maintain the sealing effect of the fuel filler cap for a long time, has a simple structure, and is convenient for connecting the oil filler cap.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A method for tightening a fuel filler cap with a fuel filler port sealing structure includes a fuel filler port, a fuel filler cap arranged at the fuel filler port, and a sealing ring arranged between the fuel filler port and the fuel filler cap, the fuel filler port includes an outer fuel filler port and an inner fuel filler port integrally connected to the upper edge of the outer fuel filler port, the axial cross-section of the inner fuel filler port is U-shaped, the sealing ring includes a sealing ring located within the inner fuel filler port, the fuel filler cap is connected to the outer fuel filler port, a pressure spring is provided between the fuel filler cap and the sealing ring, the pressure spring applies a sealing pressure to the sealing ring, and an adjusting gasket is provided between the fuel filler cap and the pressure spring.

[0009] Similar to the prior art, the present invention includes a fuel filler port, a fuel filler cap disposed at the fuel filler port, and a sealing ring disposed between the fuel filler port and the fuel filler cap to achieve sealing of the fuel filler port.

[0010] Specifically, the fuel filler port of the present invention includes an outer fuel filler port and an inner fuel filler port, and the sealing ring includes a sealing ring located within the inner fuel filler port, with a pressure spring disposed between the fuel filler cap and the sealing ring. Thus, when the fuel filler cap is rotated forward so that it is threadedly connected to the outer fuel filler port, a certain amount of pressure is applied to the pressure spring, which transmits the pressure to the sealing ring, thereby sealing the fuel filler port. After a period of use, the sealing ring will experience a certain amount of creep, which will reduce the pressure exerted by the pressure spring on the sealing ring. The hardness of the sealing ring may even increase, leading to severe oil leakage. At this point, the fuel filler cap can be rotated further forward to increase the compression of the pressure spring, thereby ensuring the sealing effect of the sealing ring.

[0011] That is to say, by rotating the fuel filler cap, the compression amount of the pressure spring can be easily adjusted to ensure that the sealing ring always maintains the appropriate sealing pressure, thereby ensuring that the sealing ring still has a good sealing effect after a long period of use.

[0012] It's understandable that conventional sealing rings are "one-time set." To ensure sealing performance, people often intentionally tighten the fuel filler cap more, which can cause excessive compression of the sealing ring and accelerate its creep. The present invention incorporates an adjustment spacer between the fuel filler cap and the pressure spring, allowing precise adjustment of the compression of the pressure spring and effectively preventing excessive compression of the sealing ring.

[0013] Preferably, an outer ring made of plastic coated on the outside of the external fuel filler port is provided with an external thread strip, an inner spiral groove matching the external thread strip is provided on the inner side of the fuel filler cap, n protrusions are provided on the external thread strip, and a shear block is provided at the open end of the inner spiral groove. The tightening process of the fuel filler cap is as follows:

[0014] a. Rotate the fuel filler cap forward so that it is threaded onto the outer ring. When the shear block abuts the first protrusion, the fuel filler cap is in the first locking state, and the pressure spring applies the first sealing pressure to the sealing ring.

[0015] b. After the usage time t1, the sealing ring begins to creep. If the fuel filler cap continues to rotate forward, the pressure spring will apply a second sealing pressure to the sealing ring.

[0016] c. After usage time t n-1 Then, repeat step b until the fuel filler cap is in the nth locked state, at which time the pressure spring applies the nth sealing pressure to the sealing ring.

[0017] First, the present invention provides an external threaded strip on the outside of the external fuel filler port, and an internal spiral groove on the inside of the fuel filler cap that cooperates with the external threaded strip, so as to facilitate the screwing of the fuel filler cap onto the external fuel filler port. Secondly, n protrusions are provided on the external threaded strip, and a shear block is provided at the open end of the internal spiral groove. In this way, we can first screw the fuel filler cap onto the external fuel filler port until the shear block abuts the first protrusion (the fuel filler cap is now in the first locking state), and the pressure spring applies the first sealing pressure to the sealing ring; after a certain period of use, the sealing ring will exhibit a certain degree of creep, and we can continue to tighten the fuel filler cap until the shear block shears the first protrusion and abuts the second protrusion, and the fuel filler cap is in the second locking state. Similarly, we can continue to tighten the fuel filler cap to increase the sealing pressure applied by the pressure spring to the sealing ring, thereby ensuring the sealing effect of the sealing ring.

[0018] It can be understood that, through the cooperation between the protrusion and the shear block, it can be ensured that the sealing pressure meets the actual demand.

[0019] As a preference, the front of the fuel filler cap is provided with a display including a display of the usage time t n-1 Timing module to facilitate users to control the usage time.

[0020] As a preferred embodiment, an outer ring made of plastic coated on the outside of the outer fuel filler port is provided with an external thread strip, an inner spiral groove matching the external thread strip is provided on the inner side of the fuel filler cap, n protrusions are provided on the external thread strip, a shear block is provided at the open end of the inner spiral groove, an induction magnet is provided in the protrusion, a reed switch is provided in the shear block, and a display including a display of the usage time t is provided on the front of the fuel filler cap. n-1 The timing module. The tightening process of the fuel filler cap is as follows:

[0021] a. Rotate the fuel filler cap forward so that it is threadedly connected to the outer ring until the shear block abuts the first protrusion. The induction magnet in the protrusion causes the reed switch in the shear block to send a trigger signal to the timing module, which starts timing. The timing module displays a green signal. The fuel filler cap is now in the first locking state, and the pressure spring applies the first sealing pressure to the sealing ring. b. After the use time t1, the sealing ring creeps and the timing module displays a red signal. Continue to rotate the fuel filler cap forward until the shear block abuts the second protrusion. The reed switch in the shear block sends a trigger signal to the timing module. The timing module displays a green signal. The fuel filler cap is now in the second locking state, and the pressure spring applies the second sealing pressure to the sealing ring. c. After the use time t n-1 Then, repeat step b until the fuel filler cap is in the nth locked state, at which time the pressure spring applies the nth sealing pressure to the sealing ring.

[0022] By cooperating with the induction magnet and the reed switch, the timing module is triggered to start timing.

[0023] Preferably, the height of the external thread is 1 / 3-1 / 2 of the depth of the internal spiral groove.

[0024] By reasonably setting the height of the external thread and the depth of the internal spiral groove, the protrusion has a suitable height.

[0025] Preferably, the reed switch is embedded in the shear block, and the reed switch is perpendicular to the radial direction of the external refueling port.

[0026] Since the reed switch is perpendicular to the radial direction of the external fuel filler port, that is, the reed switch is "transversely" embedded in the shear block. It can be understood that the reed switch is generally in the shape of a long tube. When the reed switch is transversely embedded in the shear block, the maximum size of the fuel filler cap can be avoided.

[0027] Preferably, the cross section of the external thread strip at the protrusion is in an isosceles T shape.

[0028] Since the cross section of the external thread strip is in an isosceles T shape, it has sufficient strength to prevent the protrusion from falling off by itself.

[0029] Therefore, the present invention has the following beneficial effects: the sealing effect of the oil filling port can be maintained for a long time, and the structure is simple, which facilitates the connection of the oil filling cap. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the present invention.

[0031] In the figure: 1, fuel filler port 11, external fuel filler port 12, internal fuel filler port 121, outer ring 122, inner ring 13, outer ring 131, external thread strip 132, protrusion 2, fuel filler cap 21, internal spiral groove 22, shear block 3, sealing ring 31, sealing ring 4, pressure spring 5, adjusting gasket. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] like Figure 1The figure shows a method for tightening a fuel filler cap with a fuel filler sealing structure suitable for sealing automotive lubricating oil ports. Specifically, the structure comprises a fuel filler port 1, a fuel filler cap 2 disposed on the fuel filler port, and a sealing ring 3 disposed between the fuel filler port and the fuel filler cap. The fuel filler port comprises an outer fuel filler port 11 with an upwardly convex annular shape, and an inner fuel filler port 12 integrally connected to the upper edge of the outer fuel filler port. The inner fuel filler port comprises an outer ring 121 and an inner ring 122, resulting in a U-shaped axial cross-section of the inner fuel filler port. The sealing ring comprises a sealing ring 31 positioned between the outer and inner rings, with the inner edge of the sealing ring sleeved over the upper edge of the inner ring, and the outer edge of the sealing ring sleeved over the upper edge of the outer ring. Furthermore, a pressure spring 4 is disposed between the fuel filler cap and the sealing ring. The upper end of the pressure spring presses against the inner end face of the fuel filler cap, and the lower end of the pressure spring is located between the outer and inner sides of the sealing ring, thereby applying a sealing pressure to the sealing ring to seal the fuel filler port.

[0034] That is to say, the sealing pressure of the present invention does not rely on the fuel filler cap to act on the sealing ring, but acts on the sealing ring through the pressure spring, which is conducive to the precise control of the sealing pressure.

[0035] After a certain period of use, the sealing ring will creep, causing the pressure of the pressure spring on the sealing ring to decrease. At this time, we can continue to rotate the fuel filler cap forward to increase the compression of the pressure spring, thereby ensuring the sealing effect of the sealing ring.

[0036] It is understandable that the compression deformation of the sealing ring is much smaller than the compression deformation of the pressure spring, which is beneficial to improving the adjustment accuracy of the sealing pressure.

[0037] In addition, we can also set a number of adjustment gaskets 5 between the fuel filler cap and the pressure spring to accurately adjust the initial value of the sealing pressure.

[0038] As a preferred solution, the outer surface of the external fuel filler port is covered with a plastic outer ring 13, which is provided with an external thread strip 131. The inner side of the fuel filler cap is provided with an internal spiral groove 21 that cooperates with the external thread strip to facilitate the screw connection of the fuel filler cap to the external fuel filler port. In addition, n protrusions 132 are provided at intervals on the external thread strip, and a shear block 22 is provided at the open end of the internal spiral groove. Thus, the tightening process of the fuel filler cap is as follows:

[0039] a. Rotate the fuel filler cap forward until the shear block contacts the first protrusion. The fuel filler cap is now threadedly connected to the outer ring, and the fuel filler cap is in the first locking state. The pressure spring applies the first sealing pressure to the sealing ring.

[0040] b. After usage time t1, the sealing ring begins to creep. Continued forward rotation of the fuel filler cap causes the shear block to squeeze and shear the first protrusion until it abuts the second protrusion. The fuel filler cap is now in the second locked state, and the compression spring applies a second sealing pressure to the sealing ring.

[0041] c. After usage time t n-1 Then, repeat step b until the shear block squeezes and cuts off the n-1th protrusion, and the shear block abuts against the nth protrusion. At this time, the fuel filler cap is in the nth locking state, and accordingly, the pressure spring applies the nth sealing pressure to the sealing ring.

[0042] Furthermore, we can set an induction magnet in the protrusion, a reed switch in the cutout, and a timing module on the front of the fuel filler cap to display the usage time t n-1 , which makes it easier for users to control the usage time. At this time, the tightening process of the fuel filler cap is as follows:

[0043] a. Rotate the fuel filler cap forward until the shear block contacts the first protrusion, threading the fuel filler cap onto the outer ring. The fuel filler cap enters the first locked state, and the compression spring applies the first sealing pressure to the sealing ring. The induction magnet in the protrusion then triggers the reed switch in the shear block, sending a trigger signal to the timing module, which starts timing and displays a green signal.

[0044] b. After the usage time t1, the sealing ring begins to creep, and the timing module displays the red t1 time signal. At this point, the fuel filler cap continues to rotate forward, and the shear block squeezes and cuts off the first protrusion until the shear block contacts the second protrusion. The reed switch inside the shear block again sends a trigger signal to the timing module, and the timing module displays the green time signal. The fuel filler cap is now in the second locked state, and the pressure spring applies the second sealing pressure to the sealing ring.

[0045] c. After usage time t n-1 Then, repeat step b until the shear block squeezes and cuts off the n-1th protrusion, and the shear block abuts against the nth protrusion. At this time, the fuel filler cap is in the nth locking state, and accordingly, the pressure spring applies the nth sealing pressure to the sealing ring.

[0046] Preferably, n in the above scheme can be 2 or 3.

[0047] In other words, through the cooperation of the induction magnet and the reed switch, the timing module is triggered to start timing, and the sealing pressure corresponds to the usage time, avoiding oil leakage caused by human error.

[0048] To facilitate shearing of the protrusion, the height of the external thread strip is 1 / 3-1 / 2 the depth of the internal spiral groove, while the height of the protrusion can be 1-1.5 times the depth of the internal spiral groove. Furthermore, the reed switch is embedded within the shear block, perpendicular to the radial direction of the external oil filler port. In other words, the reed switch is embedded "horizontally" within the shear block. This facilitates shearing of the protrusion and facilitates interaction between the induction magnet and the reed switch. Furthermore, the cross-section of the external thread strip at the protrusion is designed to be an isosceles T-shaped, ensuring sufficient strength to prevent the protrusion from falling off and to prevent damage to the external thread strip caused by shearing the protrusion.

Claims

1. A method for tightening a fuel filler cap having a fuel filler port sealing structure, comprising a fuel filler port, a fuel filler cap disposed at the fuel filler port, and a sealing ring disposed between the fuel filler port and the fuel filler cap, wherein: The fuel filler port includes an outer fuel filler port and an inner fuel filler port integrally connected to an upper edge of the outer fuel filler port, the inner fuel filler port having an axial cross-section that is U-shaped, the sealing ring including a sealing ring located within the inner fuel filler port, the fuel filler cap connected to the outer fuel filler port, a pressure spring disposed between the fuel filler cap and the sealing ring, the pressure spring applying a sealing pressure to the sealing ring, and an adjusting gasket disposed between the fuel filler cap and the pressure spring; The outer ring of the external fuel filler port is covered with plastic and has an external thread strip. The inner side of the fuel filler cap has an internal spiral groove that matches the external thread strip. There are n protrusions on the external thread strip, and a shear block is provided at the open end of the internal spiral groove. The method of tightening the fuel filler cap is as follows: a. Rotate the fuel filler cap forward so that it is threaded onto the outer ring. When the shear block abuts the first protrusion, the fuel filler cap is in the first locking state, and the pressure spring applies the first sealing pressure to the sealing ring. b. After the usage time t1, the sealing ring begins to creep. Continuing to rotate the fuel filler cap forward, the shear block shears the first protrusion and abuts against the second protrusion. The fuel filler cap enters the second locked state, and the compression spring now applies the second sealing pressure to the sealing ring. c. After usage time t n-1 Then, repeat step b until the fuel filler cap is in the nth locked state, at which time the pressure spring applies the nth sealing pressure to the sealing ring.

2. The method for tightening a fuel filler cap of a fuel filler sealing structure according to claim 1, wherein: The sealing ring comprises a sealing ring located between an outer ring and an inner ring, wherein the inner edge of the sealing ring is sleeved on the upper edge of the inner ring, and the outer edge of the sealing ring is sleeved on the upper edge of the outer ring.

3. The method for tightening a fuel filler cap of a fuel filler sealing structure according to claim 2, wherein: The front of the fuel filler cap is equipped with a display that can display the usage time. n-1 Timing module.

4. The method for tightening a fuel filler cap of a fuel filler sealing structure according to claim 3, wherein: An external thread strip is provided on the outer ring made of plastic coated on the outside of the external fuel filler port, an internal spiral groove matching the external thread strip is provided on the inner side of the fuel filler cap, n protrusions are provided on the external thread strip, a shear block is provided at the open end of the internal spiral groove, an induction magnet is provided in the protrusion, a reed switch is provided in the shear block, and a display including a display of the usage time t is provided on the front of the fuel filler cap. n-1 The timing module and fuel filler cap tightening process are as follows: a. Rotate the fuel filler cap forward, threading it onto the outer ring until the shear block contacts the first protrusion. The induction magnet inside the protrusion causes the reed switch inside the shear block to send a trigger signal to the timing module, which starts timing. The timing module displays a green signal. The fuel filler cap is now in the first locked state, and the compression spring applies the first sealing pressure to the sealing ring. b. After usage time t1, the sealing ring begins to creep, and the timing module displays a red signal. Continue rotating the fuel filler cap forward until the shear block contacts the second protrusion. The reed switch inside the shear block sends a trigger signal to the timing module, which displays a green signal. The fuel filler cap is now in the second locked state, and the pressure spring applies the second sealing pressure to the sealing ring. c. After usage time t n-1 Then, repeat step b until the fuel filler cap is in the nth locked state, at which time the pressure spring applies the nth sealing pressure to the sealing ring.

5. A method for tightening a fuel filler cap having a fuel filler sealing structure according to claim 2 or 4, characterized in that: The height of the external thread is 1 / 3-1 / 2 of the depth of the internal spiral groove.

6. The method for tightening a fuel filler cap of a fuel filler sealing structure according to claim 4, wherein: The reed switch is embedded in the shear block, and the reed switch is perpendicular to the radial direction of the external oil filling port.

7. The method for tightening a fuel filler cap of a fuel filler sealing structure according to claim 6, wherein: The cross section of the external thread strip at the protrusion is in an isosceles T shape.

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