JP4345133B2 - Filling port sealing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fuel filler sealing device that is used, for example, in a filler fuel filler opening led to a fuel tank of an automobile, and that includes a shutter that is opened by an inserted fuel gun.
[0002]
[Prior art]
Conventionally, a fuel tank sealing device that prevents the fuel vapor (evaporative gas) in a fuel tank supplied with a fuel such as gasoline or light oil or a filler tube connected to the fuel tank from leaking is separated from the filler tube and the filler neck. After being provided with a body and fixing the filler port body to the filler tube opening, the filler tube and filler neck were joined by welding, caulking, screwing, or the like.
[0003]
However, in the joining by welding the filler tube and the filler neck, the surface treatment applied before welding deteriorates due to heat, so if the surface treatment is performed after fixing the filler port body, the surface treatment adheres to the filler sealing device. Adverse effects such as poor seals and malfunctions due to the above, or cost increases when masking is performed.
[0004]
In addition, when the filler tube and the filler neck are joined by caulking, screwing, or the like, the strength of the joined portion is insufficient.
[0005]
For this reason, for example, as shown in FIG. 3, there is an oil filler sealing device 101 attached to an opening of a filler tube 111 in which a filler neck 112 is integrally continuous.
[0006]
In FIG. 3, reference numeral 200 denotes a fuel tank that supplies fuel to the canister 220 through a fuel pipe 210. The fuel tank 200 is connected to a filler tube 111 that guides fuel supplied from the fuel gun 113.
[0007]
The filler tube 111 is provided with a fuel filler sealing device 101 for preventing fuel vapor leakage. In addition, a filler neck 112 is integrally continuous with the atmosphere side A of the opening of the filler tube 111.
[0008]
The filler neck 112 is larger in diameter than the filler tube 111 and has a center on the upper side. Further, a protruding female screw 112a for the filler cap 150 is provided on the inner peripheral surface of the filler neck 112 (see FIG. 4), and the filler cap 150 is screwed and attached to be covered. .
[0009]
In general, the filler neck 112 and the filler cap 150 are provided in a shape similar to that of each manufacturer in the case of the screw-in type as described above, and has commonality.
[0010]
Fig.4 (a) is sectional drawing to which the A section of FIG. 3 was expanded, and has shown the oil filler sealing device of the prior art. 4B is a view from the tank side, FIG. 4C is a view from the atmosphere side, and FIG. 4D is a top view.
[0011]
As shown in FIG. 4, the oil filler sealing device 101 is a gap between the oil filler body 102 having a cylindrical shape and having a through hole 103 penetrating from the atmosphere side A to the tank side T and the oil gun 113 when the oil gun 113 is inserted. A seal packing 105 made of a rubber-like elastic body, a plate 106 for fixing the seal packing 105 to the fuel filler body 102, and a normally closed shutter 107 for closing the through hole 103 when the fuel gun 113 is not inserted. I have.
[0012]
A seal packing 105 and a plate 106 are mounted in the through hole 103 of the fuel filler body 102.
[0013]
In addition, the tank side T of the fuel filler body 102 is pivotally supported by the rotation shaft 109 of the support portion 108 above the tank side T opening of the through hole 103 and wound around the rotation shaft 109. A shutter 107 that closes the tank side T opening of the through hole 103 by the biasing force of the spring 110 is provided.
[0014]
Then, the filler port body 102 provided with the seal packing 105, the plate 106, the shutter 108 and the like is assembled from the atmosphere side A of the filler neck 112 and fixed to the opening of the filler tube 111 to constitute the filler port sealing device 101. It was.
[0015]
[Problems to be solved by the invention]
However, in the case of the conventional fuel filler sealing device as described above, there are the following problems.
[0016]
It was impossible to change the shape of the filler neck 112 in order to incorporate the fuel filler body 102 because the filler neck 112 and the filler cap 150 would lose commonality with other companies.
[0017]
Therefore, it is necessary to reduce the size of the filler port body 102 by providing the built-in filler port outer peripheral radius smaller than the filler neck inner peripheral radius P from which the female screw 112a protrudes. Since all of the parts of the fuel filler sealing device 101 are mounted on the fuel filler body 102 to be incorporated, it is necessary to reduce the size of all the parts.
[0018]
Due to this downsizing, the spring 110 that applies the urging force to the shutter 107 is particularly limited by space, and it becomes difficult to satisfy the required specifications (load, constant, durability). In addition, the shutter 107 has insufficient arrangement space, and it is difficult to secure the opening when the valve is opened, and the strength is reduced due to downsizing.
[0019]
The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide a fuel filler sealing device that improves the downsizing and durability of the shutter and the spring and downsizing the device. It is to provide.
[0020]
[Means for Solving the Problems]
In order to achieve the above object, in the present invention, a filler tube that supplies fuel to a fuel tank, is integrally provided continuously with a filler neck on the atmosphere side, and has an arc-shaped portion on the inner peripheral surface ; The filler tube opening is inserted and fixed from the atmosphere side through the filler neck, and has a fuel filler body having a through hole into which the nozzle of the fuel gun is inserted, and the nozzle of the fuel gun is inserted. A seal packing that seals a gap between the through hole and the nozzle part of the fueling gun when disposed, and a tank part of the fueling port body, and the nozzle part of the fueling gun is disposed in the through hole of the fueling port body. There opens the tank side opening of the through hole of the fuel supply port body rotates on the tank side by being inserted, a shutter pivotable normally closed, the fuel supply port in the shutter Bode Which has a spring biasing to close always tank side opening of the through hole, with a, a rotation shaft for rotatably supported the shutter is disposed on the atmosphere side than the shutter refueling in the mouth sealing device, before Symbol shutter a cylindrical side surface have a shape hollowed circular, and the width direction right and left ends is bent to the atmosphere, is the width direction right and left ends at the time of valve opening of said filler tube The filler tube is provided in a curved shape along the arc shape of the inner peripheral surface of the filler tube so as not to contact the periphery .
[0021]
Therefore, the rotation axis is arranged on the atmosphere side of the shutter, and the opening of the shutter can be reduced when the valve is opened, so the operating angle of the spring is reduced, the spring can be downsized, and durability is also improved. improves.
[0022]
In addition, since the shutter has a curved shape along the inner peripheral surface of the filler tube at the time of valve opening, it does not contact the inner peripheral surface of the filler tube at the time of valve opening, and space saving can be achieved without adversely affecting the valve opening operation. In addition, the strength can be enhanced.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Exemplary embodiments of the present invention will be described in detail below with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention only to those unless otherwise specified. Absent.
[0024]
FIG. 1A is a cross-sectional view showing a fuel filler sealing device according to an embodiment. 1B is a view from the tank side, FIG. 1C is a view from the atmosphere side, and FIG. 1D is a top view. FIG. 2 is a cross-sectional view showing a state of the fuel filler sealing device during fueling.
[0025]
The fuel filler sealing device 1 prevents leakage of fuel vapor (evaporative gas) in a fuel tank supplied with fuel such as gasoline or light oil, or a filler tube 11 connected to the fuel tank, as in the prior art shown in FIG. It is attached to the filler tube 11 opening. A filler neck 12 is integrally provided continuously on the atmosphere side A of the opening of the filler tube 11.
[0026]
On the inner peripheral surface of the filler neck 12, a female screw 12a for screwing a filler cap that covers the opening of the filler neck 12 is provided. As shown in FIG. 2, the female screw 12 a can catch the hook portion 13 a of a nozzle portion (hereinafter referred to as “fuel gun”) 13 of the fuel gun when the fuel is supplied, and can fix the fuel gun 13.
[0027]
The oil filler opening sealing device 1 is configured by incorporating an oil filler body 2 from the atmosphere side A through a filler neck 12 continuous with a filler tube 11 and fixing the filler tube 11 to an opening of the filler tube 11.
[0028]
An oil filler sealing device 1 includes an oil filler body 2 fixed to an opening of a filler tube 11, a rubber-like elastic seal packing 5 that seals a gap between the oil gun 13 when the oil gun 13 is inserted, and a seal packing. And a normally closed shutter 7 that closes the through hole 3 of the fuel filler body 2 when the fuel gun 13 is not inserted.
[0029]
First, the fuel filler opening body 2 will be described. The fuel filler body 2 has a through hole 3 that penetrates from the atmosphere side A to the tank side T in the same cylindrical shape as that described in the prior art.
[0030]
On the outer peripheral surface of the filler port body 2, an O-ring groove 2 a for interposing an O-ring 14 made of a rubber-like elastic body is provided in a portion that contacts the filler tube 11. As a result, an O-ring 14 is interposed between the filler tube 11 and the outer periphery of the fuel filler body 2 so that there is no leakage outside.
[0031]
The through hole 3 of the filler port body 2 is inserted with a fuel gun 13, and the first step portion 3 a, the second step portion 3 b, and the third step portion 3 c are formed so that the diameter decreases toward the tank side T. It is a stepped hole provided.
[0032]
The first step portion 3a is provided on the atmosphere side A, and the seal packing 5 and the plate 6 are fitted to each other. In addition, on the inner peripheral surface of the first stepped portion 3a, there are provided four hook holes 2b on which the claws 6a provided on the plate 6 are hooked, like the claws 6a. The hooking hole 2b penetrates to the outer periphery of the fuel filler opening body 2 as shown in FIG.
[0033]
The second stepped portion 3b is provided with a reduced diameter on the tank side T of the first stepped portion 3a, and the third stepped portion 3c is provided further on the tank side T of the second stepped portion 3b.
[0034]
Further, the tank side T of the fuel filler body 2 is provided with a cylindrical portion 4 in which the third step portion 3 c of the through hole 3 is formed on the inner periphery, and a shutter 7 that covers the tank side T opening of the through hole 3. And a support portion 8 having a rotating shaft 9 that pivotally supports the shutter 7 above the cylinder portion 4 and a spring 10 that biases the shutter 7 toward the tank side T opening of the through hole 3.
[0035]
Next, the seal packing 5 will be described. The seal packing 5 includes a fixed portion 5a fixed to the plate 6 and a wedge-shaped lip portion 5b extending toward the tank side T while reducing the diameter from the inner diameter end of the fixed portion 5a.
[0036]
An annular groove 5c is provided on the inner peripheral surface of the fixed part 5a, and an annular protrusion 6e formed on the tank side T outer diameter of the engaging part 6d of the plate 6 is engaged with the annular groove 5c. The seal packing 5 is fixed. The lip portion 5 b seals the gap with the outer periphery of the fuel gun 13 when the fuel gun 13 is inserted.
[0037]
The plate 6 includes a plate main body 6b provided with a claw 6a on the outer periphery of the hook hole 2b of the through hole 3 of the fuel filler opening body 2, a guide surface 6c of a guide hole through which the central fuel gun 13 is inserted, and a seal packing 5. And an engaging portion 6d having a projecting portion 6f for preventing the seal packing 5 from returning at the T end on the tank side.
[0038]
A tapered guide surface 6c is provided on the inner periphery of the guide hole of the plate body 6b. The tapered guide surface 6c decreases in diameter toward the tank side T that guides the oil supply gun 13 to be inserted. The engaging portion 6d is fixed by engaging with the fixing portion 5a of the seal packing 5, and maintains the seal packing 5 in a certain shape.
[0039]
The claw 6a of the plate body 6b is plate-shaped and elastically repels in the outer diameter direction, protrudes in the outer diameter direction, is caught in the hooking hole 2b on the inner peripheral surface of the first step portion 3a of the through hole 3, and is sealed. The packing 5 and the plate 6 are mounted in the through hole 3.
[0040]
Thus, the plate 6 and the seal packing 5 can be detached from the through hole 3 by removing the claw 6a of the plate body 6b from the hooking hole 2b.
[0041]
This is because the fuel supply gun 13 has pressure sensing holes and scratches, burrs and the like generated on the outer periphery of the fuel supply gun 13, and the lip portion 5 b is damaged by the fuel supply gun 13 that slides on the seal packing 5 by insertion and removal operations. This is because the worn seal packing 5 needs to be replaced.
[0042]
The new seal packing 5 is fixed to the plate 6 and attached by hooking the claws 6a of the plate body 6b into the hooking holes 2b.
[0043]
The shutter 7 has a shape in which a cylindrical side surface is cut out in a circular shape, and the left and right ends in the width direction of the shutter 7 are bent to the atmosphere side A. The right and left ends of the direction are provided in a curved shape that follows the arc shape of the inner peripheral surface of the filler tube 11 without contacting the inner peripheral surface of the filler tube 11.
[0044]
Note that the cylindrical portion 4 tank side T end portion of the fuel filler body 2 is also cut in the same shape as the shutter 7 so as to be sealed by the shutter 7.
[0045]
The shutter 7 is rotatably supported on a rotating shaft 9 provided on a support portion 8 on the tank side T side surface of the fuel filler body 2, and is moved to the atmosphere side A by a spring 10 wound around the rotating shaft 9. It is energized.
[0046]
The rotation shaft 9 is arranged on the atmosphere side A rather than the shutter 7 so as to be fixed to the atmosphere side A surface of the shutter 7, and the shutter 7 which is rotated and opened to the tank side T during refueling is rotated. It is provided so as to be lifted above the moving shaft 9 so that the opening degree of the shutter 7 can be minimized.
[0047]
The spring 10 is wound around the rotation shaft 9 of the support portion 8 and biases the shutter 7 to the cylinder portion 4 tank side T end portion of the fuel filler body 2 by the biasing force toward the atmosphere side A.
[0048]
Therefore, when not refueling, that is, when the refueling gun 13 is not inserted, only the urging force of the spring 10 acts on the shutter 7, and the shutter 7 is pressed against the cylindrical portion 4 tank side T end portion of the refueling port body 2, and the through hole 3 The tank side T opening is covered and fuel vapor is prevented from leaking to the atmosphere side T (normally closed state in FIG. 1).
[0049]
On the other hand, when refueling, that is, when the refueling gun 13 is inserted, the front end of the refueling gun 13 abuts against the shutter 7 by being guided by the guide surface 6c of the plate 6 and the pushing force of the refueling gun 13 moves the shutter 7 to the atmosphere side A. When the force of the energizing spring 10 is exceeded, the shutter 7 rotates to the tank side T and opens, and the refueling gun 13 is further inserted into the back, and the outer periphery of the refueling gun 13 is gripped by the lip portion 5b. Then, refueling becomes possible (FIG. 2).
[0050]
Thus, the fuel filler sealing device 1 maintains a sealed state regardless of whether the fuel gun 13 is inserted or not inserted, and prevents the fuel vapor on the tank side T from being released into the atmosphere. ing.
[0051]
In the fuel filler sealing device 1 according to the present embodiment having the above-described configuration, the rotation shaft 9 is fixed to the atmosphere-side A surface of the shutter 7, and the shutter 7 that rotates about the rotation shaft 9 is When the valve is opened, it is lifted above the pivot shaft 9. That is, the atmosphere side A surface of the shutter 7 moves above the rotation shaft 9 along the outer periphery of the rotation shaft 9.
[0052]
Thereby, the opening degree of the shutter 7 required when the fueling gun 13 is inserted can be reduced, and the operating angle of the spring 10 can be reduced, so that the stress of the spring 10 does not increase and the size can be reduced. A decrease in durability of the spring 10 is prevented.
[0053]
In addition, there is a limit to the load during operation, and if the operating angle of the spring 10 is large, it is necessary to increase the coil diameter or increase the number of turns to reduce the constant of the spring 10. For this reason, there is a possibility that the spring 10 that satisfies the specifications cannot be provided when the oil filler sealing device 1 is downsized and there is a restriction on the installation space, but by reducing the operating angle of the spring 10, Such a thing can also be eliminated.
[0054]
Furthermore, the shutter 7 has a curved shape along the inner peripheral surface of the filler tube 11 when the valve is opened, and the left and right ends in the width direction of the shutter 7 do not contact the inner periphery of the filler tube 11 even when the valve is open. Therefore, the space can be saved without adversely affecting the operation of the shutter 7, and the strength of the shutter 7 itself can be strengthened rather than the flat plate shape.
[0055]
Accordingly, since the shutter 7 and the spring 10 can be reduced in size while considering durability, the filler opening sealing device 1 can be reduced in size, and can be easily incorporated by the downsizing, and the assembly of the filler opening sealing device 1 is facilitated. Will improve.
[0056]
In the present embodiment, the rotation shaft 9 is fixed to the atmosphere-side A surface of the shutter 7, but the present invention is not limited to this. For example, the rotation shaft 9 disposed on the atmosphere-side A with respect to the shutter 7 Any configuration may be used as long as the rotation shaft 9 is disposed closer to the atmosphere side A than the shutter 7 so as to reduce the opening of the shutter 7 when the valve is opened, such as connecting the shutter 7 with a connecting member.
[0057]
【The invention's effect】
As described above, in the present invention, the rotation shaft is disposed on the atmosphere side of the shutter, and the opening degree of the shutter when the valve is opened can be reduced, so the operating angle of the spring is reduced. The spring can be downsized and the durability can be improved.
[0058]
In addition, since the shutter has a curved shape along the inner peripheral surface of the filler tube at the time of valve opening, it does not contact the inner peripheral surface of the filler tube at the time of valve opening, and space saving can be achieved without adversely affecting the valve opening operation. In addition, the strength can be enhanced.
[0059]
Therefore, the shutter and the spring can be downsized in consideration of durability, and the oil filler sealing device can be downsized as a whole, and since the miniaturization facilitates the assembly, the assembly of the oil filler sealing device is easy. Will also improve.
[Brief description of the drawings]
FIG. 1 is a diagram showing a fuel filler sealing device according to an embodiment.
FIG. 2 is a cross-sectional view showing a valve opening state of the fuel filler sealing device according to the embodiment.
FIG. 3 is a model diagram showing an oil supply path to which an oil supply port sealing device is applied.
FIG. 4 is a view showing a conventional oil filler sealing device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Oil supply port sealing device 2 Oil supply port body 2a O-ring groove | channel 2b Hooking hole 3 Through hole 3a 1st level | step-difference part 3b 2nd level | step-difference part 3c 3rd level | step-difference part 4 Cylindrical part 5 Seal packing 5a Fixing part 5b Lip part 5c 6 Plate 6a Claw 6b Plate body 6c Guide surface 6d Engaging portion 6e Annular projection 6f Protruding portion 7 Shutter 8 Supporting portion 9 Rotating shaft 10 Spring 11 Filler tube 12 Filler neck 13 Oiling gun 14 O-ring

Claims (1)

A filler tube that supplies fuel to a fuel tank, integrally and continuously provides a filler neck on the atmosphere side, and has an arc-shaped portion on the inner peripheral surface ;
A filler port body having a through-hole into which the nozzle portion of the fuel gun is inserted and fixed to the filler tube opening from the atmosphere side through the filler neck,
A seal packing that seals a gap between the through hole and the nozzle portion of the fuel gun when the nozzle portion of the fuel gun is inserted;
A tank side opening of the through hole of the fuel filler body is disposed on the tank side of the fuel filler body and rotated to the tank side by inserting the nozzle portion of the fuel gun into the through hole of the fuel filler body. A normally closed rotary shutter that opens the valve,
The shutter has a spring that urges the tank side opening of the through hole of the fuel filler opening body to be always closed, and is disposed on the atmosphere side of the shutter so as to pivotally support the shutter. An oil filler sealing device comprising a shaft,
Before SL shutter a cylindrical side surface have a shape hollowed circular, and the width direction right and left ends is bent to the atmosphere, at the time of opening contact against the width direction right ends on the inner circumference of the filler tube no way, fuel supply port sealing device, characterized in that provided in a curved shape along the arc shape in the filler tube circumference.

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