JPH10309946A - Oil filler port structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil filler port structure that maintains the sealing ability of a sealing member in an oil filler port for a longer period. SOLUTION: An oil filler port 1 comprises a larger-diameter part 1a on the opened side and a smaller-diameter part 1b on the back side. The larger- diameter part normally holds therein a sealing member 9 pressed upward by the elastic force of a spring 12. When the nozzle of a feeder gun is inserted in the port into engagement with an engaging member 10 and is further pressed to the back, the sealing member together with the nozzle slides to the smaller- diameter part where its periphery 9c is constricted by the port inner periphery and its nozzle through hole 9a is contracted in diameter consequently to seal the nozzle periphery. During its further insertion down to the back of the port for the purpose of opening a switching valve 4, the nozzle is moved together with the sealing member, which state prevents the sealing member being sealing the nozzle periphery from being worn out thereby. When pulled out after oil filling, the nozzle is moved up to the larger-diameter part together with the sealing member and is then pulled out of the sealing member after the release of the nozzle periphery from the sealed state, which setup prevents the sealing member from tearing by inversion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel supply port structure into which a tip of a fuel gun is inserted when fuel is supplied to a fuel tank of a vehicle having an internal combustion engine.

[0002]

2. Description of the Related Art Conventionally, in a vehicle such as an automobile equipped with an internal combustion engine, a seal ring or a lip seal is provided at a filler port to prevent fuel from evaporating into the atmosphere from a filler port. And the like, so as to seal the gap between the nozzle of the refueling gun inserted into the refueling port and the refueling port.

[0003]

As described above, conventionally, in order to prevent fuel from evaporating into the atmosphere at the time of refueling, a seal member is provided at the fuel supply port. A hole having a smaller diameter than the outer diameter of the nozzle of the gun is fixedly attached to an oil filler by an elastic member such as rubber provided at a center portion, and the nozzle of the oil filler gun is inserted into the hole of the elastic member, so that the oil filler is connected to the oil filler. Since the gap between the nozzle and the nozzle was designed to seal, the outer peripheral surface of the refueling gun, which is often scratched and often in the form of a file, is inserted into the hole of the seal member when the nozzle is inserted. When the seal member is damaged by rubbing, or when the nozzle is inserted further into the oil filler port, the seal member is rubbed and worn by the outer peripheral surface of the nozzle of the file-shaped oil gun, and when the nozzle is pulled out. To sea Depending on the cause of such members cut inverted occurs, sealing of the seal member has a disadvantage that say decreases gradually.

For this reason, a vehicle is provided with a cam mechanism to be brought into contact with the nozzle of the refueling gun at the refueling port, and after the nozzle tip of the refueling gun is inserted into the hole of the sealing member, the outer periphery of the nozzle is sealed by the sealing member. A fuel supply port structure is disclosed in Japanese Patent Publication No. 5-87404.

However, according to the above-mentioned known technique, in order to open the internal valve, after sealing with a sealing member, the nozzle of the refueling gun is further inserted deep into the refueling port, and after refueling is completed, the internal valve is closed. Since it was necessary to pull out the nozzle of the refueling gun while sealing it with the seal member, it is difficult to prevent the occurrence of abrasion due to friction with the nozzle outer peripheral surface of the seal member and the occurrence of breakage due to reversal even in the known technique, Therefore, there is a disadvantage that the sealing performance of the sealing member cannot be prevented from being reduced by interference with the nozzle.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a fuel filler structure capable of maintaining a sealing property of a seal member of the fuel filler structure for a long period of time. I do.

[0007]

In order to achieve the above-mentioned object, according to the first aspect of the present invention, there is provided a fuel filler port into which a fuel gun tip is inserted, and a gap between the fuel filler port and the inserted fuel gun tip. A refueling port structure provided with an elastic sealing member for sealing the refueling port, the refueling port has an inner diameter whose opening side is larger than the inner side, and the sealing member has a hole through which the refueling gun tip is inserted, The refueling gun includes an engaging member that engages with the refueling gun distal end in a state where the refueling gun distal end is inserted, and an outer peripheral surface that is in sliding contact with an inner peripheral surface of the refueling port, and that is engaged with the engaging member. It is characterized in that it is configured to slide back and forth between the opening side and the back side according to the movement of the tip of the refueling gun.

[0008] In the fuel filler opening structure according to the first aspect of the present invention, when the fuel gun tip is inserted into the fuel filler, the seal member is located on the fuel filler opening side, and in this state, the elastic seal member is provided. Since the inner diameter of the hole is larger than when the seal member is at the back side of the filler port, it is easy to insert the tip of the filler gun into the hole of the seal member. Of the seal member due to the rubbing.

The seal member slides with the tip of the refueling gun engaged with the engaging member while sliding the outer peripheral surface against the inner peripheral surface of the refueling port to the inner side of the refueling port. Pressure is applied on the inner peripheral surface to reduce the inner diameter of the hole, thereby sealing the gap between the tip of the refueling gun and the refueling port. When the refueling is completed and the tip of the refueling gun is pulled out from the refueling port, the seal member slides together with the tip of the refueling gun to the refueling port opening side, and after the hole expands to the original inner diameter on the opening side. Then, the tip of the refueling gun is pulled out of the hole of the seal member. Accordingly, it is possible to prevent the seal member from being worn due to friction with the outer periphery of the oil supply gun tip and the seal member from being cut due to inversion.

According to a second aspect of the present invention, in the fuel supply port structure according to the first aspect, the hole of the seal member has an inner diameter larger than an outer diameter of a tip of the fuel gun when the seal member is on the opening side. And when the seal member is on the far side, the inner diameter is reduced so that the inner peripheral surface is in close contact with the outer peripheral surface of the refueling gun tip.

[0011] With this configuration, at the start of insertion of the refueling gun tip, the inner diameter of the hole of the seal member is larger than the outer diameter of the refueling gun tip, and the refueling gun tip can be easily inserted. Damage is more reliably prevented. Also, when the seal member moves to the far side of the fuel filler port together with the fuel gun tip, the inner peripheral surface of the hole of the seal member is in close contact with the outer peripheral surface of the fuel gun distal end, and the gap between the fuel gun distal end and the fuel filler port is sealed. Is done.

According to a third aspect of the present invention, in the fuel supply port structure according to the first or second aspect, an opening / closing valve mechanism for opening and closing the passage is provided in a passage communicating the fuel inlet and the fuel tank. The on-off valve mechanism is characterized in that it is opened when the tip of the refueling gun moves to the far side.

With this configuration, the fuel supply port and the fuel tank communicate with each other only when the gap between the fuel gun tip and the fuel filler port is sealed, so that the evaporation of fuel from the fuel filler port can be more reliably prevented.

According to a fourth aspect of the present invention, in the vehicle filler opening structure according to any one of the first to third aspects, the inner periphery of the filler opening reduces friction with the outer periphery of the seal member. Is performed.

With this configuration, it is possible to prevent the sealing property of the seal member from being deteriorated due to friction between the outer peripheral surface of the seal member and the inner peripheral surface of the fuel filler.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing a schematic configuration of a fuel filler structure according to an embodiment of the present invention.

In FIG. 1, a fuel filler port 1 is connected to a vehicle body structure 20.
It is fixed to. The filler port 1 is integrally formed with a filler pipe 2 communicating with a fuel tank (not shown). The filler pipe 2 and the filler port 1 are separated by a partition wall 3. A hole 3a is formed in the center of the partition wall 3, and the filler port 1 and the filler pipe 2 communicate with each other through the hole 3a.

The hole 3a of the partition wall 3 is opened and closed by an on-off valve 4. An annular groove 5 is provided on the inner periphery of the filler pipe 2, and a washer 6 is fitted into the annular groove 5. A spring 7 is mounted between the on-off valve 4 and the washer 6, and the on-off valve 4 is urged by the spring 7 in the valve closing direction.

The filler port 1 has a large-diameter portion 1a on the opening side, a small-diameter portion 1b on the back side having an inner diameter smaller than the large-diameter portion 1a, and a tapered portion 1c connecting the large-diameter portion 1a and the small-diameter portion 1b. It is composed of A nozzle of a refueling gun inserted into the refueling port 1 at the time of refueling is provided in the large diameter portion 1a of the refueling port 1 (see FIGS. 4 to 6, the nozzle corresponds to the tip of the refueling gun described in the claims). A seal member 9 made of an elastic material such as synthetic rubber for sealing a gap between the fuel filler 1 and the inner periphery of the fuel filler 1 is provided. The sealing member 9 has an engaging member 10 which engages with a nozzle of a refueling gun, and eight pins 1 having heads at both ends.
Attached by one.

FIG. 2 is a plan view of the seal member 9 as viewed from the opening side of the oil filler port 1. FIG. As shown in FIG.
Has a donut shape in which a nozzle insertion hole 9a through which the nozzle of the refueling gun is inserted is provided at the center. Seal member 9
Is provided with eight pin head storage holes 9b in which one of the two heads of the pin 11 is embedded at regular intervals in the circumferential direction, having an outer peripheral surface 9c that is in sliding contact with the inner peripheral surface of the fuel filler port 1. ing.

Returning to FIG. 1, the engaging member 10 includes a boss 10a through which the nozzle of the fuel gun is inserted, and a flange provided at one end of the boss 10a and engaging with the other head of the pin 11. 10b and a reduced-diameter engaging portion 10c provided at the other end of the boss portion 10a and engaged with the nozzle of the refueling gun. The nozzle of the refueling gun engages with the engaging portion 10c while being inserted through the nozzle insertion hole 9a of the seal member 9 and the boss 10a of the engaging member 10.

A spring 12 is mounted between the engaging member 10 and the partition wall 3, one end of which contacts the flange portion 10 b of the engaging member 10 and the other end of which contacts the partition wall 3. Due to the elastic force of the seal member 9, the nozzle of the refueling gun is normally not inserted into the refueling port 1,
It is held in the large diameter portion 1a. When the nozzle of the refueling gun is inserted into the refueling port 1, the nozzle of the refueling gun is
As the seal member 9 is inserted to the back side, the seal member 9 moves to the small-diameter portion 1b on the back side of the oil supply port 1 while sliding the outer peripheral surface 9c against the inner peripheral surface of the oil supply port 1 against the elastic force of the spring 12. I do.

A seal member 9 is provided on the inner peripheral surface of the fuel filler port 1.
In order to reduce friction with the outer peripheral surface 9c, a process such as Teflon treatment is performed to smooth the surface. As described above, the processing for reducing the friction with the outer peripheral surface 9c of the seal member 9 is performed on the inner peripheral surface of the oil filler port 1, thereby preventing the wear of the seal member 9 and further improving the sealing property of the seal member 9. It can be held for a long time.

The nozzle insertion hole 9a of the seal member 9 has an inner diameter slightly larger than the outer diameter of the nozzle tip of the refueling gun when the seal member 9 is located in the large-diameter portion 1a of the refueling port 1, and the seal member 9 has a small-diameter portion. 1b, the outer peripheral surface 9c of the seal member 9 is pressed by the inner peripheral surface of the small-diameter portion 1b to reduce the diameter of the nozzle insertion hole 9a, and the inner peripheral surface of the nozzle insertion hole 9a comes into close contact with the outer peripheral surface of the nozzle. The inner diameter is set so as to seal the outer periphery of the nozzle tip.

Next, the details of the on-off valve 4 will be described with reference to FIG. FIG. 3 is a structural diagram showing a schematic configuration of the on-off valve 4. 2A is a plan view of the on-off valve 4, and FIG. 2B is a partial cross-sectional view of the on-off valve 4 as viewed from the side.

The on-off valve 4 comprises a substantially hemispherical valve body 4a made of an elastic material such as synthetic rubber and a head 4b made of a polymer compound such as plastic. Valve body 4
a is provided with an engagement hole 40 which is opened at the top end of the top, and a large diameter portion 50 provided below the head 4b is embedded in the engagement hole, so that the valve body 4a and the head 4b are separated from each other. It is integrated. The upper part of the head 4b of the on-off valve 4 has a substantially inverted conical shape with a cross-shaped cross section, and when the nozzle of the refueling gun is inserted to the far side of the refueling port 1, the engaging portion of the engaging member 10 The opening / closing valve 4 is opened by contacting the upper end face 10 c of the head 4 b of the opening / closing valve 4.

Next, with reference to FIGS. 4 to 6, the operation of the fuel supply port structure according to the embodiment of the present invention configured as described above will be described.

FIG. 4 shows that the nozzle 30 of the refueling gun is connected to the refueling port 1.
FIG. 4 is a diagram showing an initial state when the device is inserted into the device. In this state, the seal member 9 is located at the large-diameter portion 1a on the opening side of the fuel filler port 1, and the tip of the nozzle 30 is inserted into the nozzle insertion hole 9a of the seal member 9 and the boss portion 10a of the engagement member 10, and It is engaged with the engaging portion 10c of the joining member 10.

In this state, the inner diameter of the nozzle insertion hole 9a of the seal member 9 is slightly larger than the outer diameter of the nozzle 30, so that the tip of the nozzle 30 of the seal member 9 when the nozzle 30 is inserted into the nozzle insertion hole 9a. Can be prevented from being damaged.

FIG. 5 shows a state in which the tip of the nozzle 30 of the refueling gun is inserted into the refueling port 1 until the engaging portion 10c of the engaging member 10 contacts the upper end surface of the head 4b of the on-off valve 4. FIG. In this state, the outer peripheral surface 9c
Is slid in contact with the inner peripheral surface of the refueling port 1 and slides up to the upper portion of the small-diameter portion 1b on the inner side of the refueling port 1. At the upper portion of the small-diameter portion 1b, the outer peripheral surface 9c is pressed by the inner peripheral surface of the small-diameter portion 1b. The diameter of the insertion hole 9a is reduced, whereby the inner periphery of the nozzle insertion hole 9a is in close contact with the outer periphery of the nozzle 30, and the outer periphery of the nozzle 30 is sealed.

FIG. 6 is a diagram showing a state in which the nozzle 30 is further inserted to the inner side of the oil supply port 1 to start oil supply. In this state, the sealing member 9 that seals the nozzle 30 at the upper portion of the small-diameter portion 1b in FIG. 5 further moves to the lower portion of the small-diameter portion 1b with the movement of the nozzle 30 engaged with the engaging member 10, and the on-off valve 4 Is pressed down by the engaging portion 10c of the engaging member 10 abutting on the upper end surface of the head 4b,
The valve is open. At this time, the fuel discharged from the tip of the nozzle 30 flows into the filler pipe 2 through a gap between the head 4b of the on-off valve 4 having a cross-shaped cross section and the hole 3a of the partition wall 3.

As described above, even after the sealing member 9 seals the nozzle 30, the outer peripheral surface 9c slides in the small-diameter portion 1b together with the nozzle 30 while sliding the outer peripheral surface 9c against the inner peripheral surface of the oil supply port 1. Even when the nozzle 30 is further inserted to the inside of the oil supply port 1 to open the valve, friction is not caused by the outer periphery of the nozzle 30, and therefore, wear of the seal member 9 due to friction with the nozzle 30 can be prevented.

When the refueling is completed and the nozzle 30 is pulled out from the refueling port 1, the seal member 9 moves the tip of the nozzle 30 toward the refueling port 1 opening side in FIG. , The inner diameter of the nozzle insertion hole 9a is enlarged at the large diameter portion 1a, and the sealed state of the nozzle 30 is released. Since the nozzle 30 is pulled out from the nozzle insertion hole 9a in this state, it is possible to prevent the seal member 9 from being cut due to inversion at the time of the drawing.

The filler port 1 has a large diameter portion 1a and a small diameter portion 1b.
It is also possible to eliminate the distinction and make the whole tapered. The configuration of the on-off valve 4 is not limited to the illustrated example.
The seal member 9 and the engagement member 10 may be formed integrally.

[0036]

According to the first aspect of the present invention, when the tip of the refueling gun is inserted into the hole of the seal member, the inner diameter of the hole is large, so that the tip of the refueling gun is not inserted into the hole of the seal member. This makes it easier to prevent the seal member from being damaged due to friction with the fuel gun tip when the fuel gun tip is inserted. Also, as the tip of the refueling gun is inserted into the back side of the filler port, the seal member moves to the back side of the filler port together with the tip of the filler gun. Since the gap with the mouth is sealed, abrasion due to friction between the seal member and the outer peripheral surface of the tip of the oil supply gun is prevented. Also, when the refueling is finished and the tip of the refueling gun is pulled out from the refueling port, the sealing state of the tip of the refueling gun is released and then the tip of the refueling gun is pulled out of the hole of the sealing member. Can be prevented.

As described above, according to the fuel supply port structure of the first aspect, damage, abrasion, and breakage due to the interference of the seal member with the tip of the fuel gun can be prevented, thereby increasing the sealability of the seal member. It can be kept over a period.

According to the fuel supply port structure of the second aspect, the inner diameter of the hole of the sealing member is larger than the outer diameter of the fuel gun tip when the fuel gun tip is inserted. Damage of the seal member can be more reliably prevented.

According to the fuel supply port structure of the third aspect, the passage communicating the fuel supply port and the fuel tank is opened in a state where the gap between the fuel supply port and the tip of the fuel supply gun is sealed by the seal member. Evaporation of fuel from the fuel supply port during refueling can be more reliably prevented.

According to the lubrication port structure of the fourth aspect, since the inner peripheral surface of the lubrication port is subjected to a treatment for reducing friction with the outer peripheral surface of the seal member, the outer peripheral surface of the seal member is formed. Friction with the inner periphery of the filler port is reduced, and the sealing property of the seal member can be maintained for a longer period.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view illustrating a schematic configuration of a fuel filler structure according to an embodiment of the present invention.

FIG. 2 is a plan view of a seal member.

FIG. 3 is a structural diagram showing details of an on-off valve.

FIG. 4 is an explanatory view showing each state when a nozzle of a refueling gun is inserted into a refueling port.

FIG. 5 is an explanatory diagram showing each state when a nozzle of a refueling gun is inserted into a refueling port.

FIG. 6 is an explanatory view showing each state when a nozzle of a refueling gun is inserted into a refueling port.

[Explanation of symbols]

 Reference Signs List 1 filler port 2 filler pipe (passage) 3 partition wall 4 on-off valve (on-off valve mechanism) 9 seal member 10 engagement member

Claims (4)

[Claims] 1. A fuel filler structure comprising: a fuel filler port into which a fuel gun tip is inserted; and an elastic sealing member for sealing a gap between the fuel filler port and the inserted fuel gun tip.
The refueling port has an inner diameter whose opening side is larger than the inner side, and the seal member is configured to engage with the hole through which the refueling gun tip is inserted and the refueling gun tip in a state where the refueling gun tip is inserted through the hole. An engaging member, and an outer peripheral surface that is in sliding contact with an inner peripheral surface of the fuel filler port, and the opening side and the back side move in accordance with movement of the tip of the fuel gun engaged with the engaging member. An oil filler structure characterized by being reciprocally slidable between the two. 2. The hole of the seal member has an inner diameter larger than an outer diameter of a tip of the refueling gun when the seal member is on the opening side and a reduced inner diameter when the seal member is on the back side. The fuel supply port structure according to claim 1, wherein an inner peripheral surface is configured to be in close contact with an outer peripheral surface of the fuel gun distal end. 3. An on-off valve mechanism for opening and closing the passage in a passage connecting the fuel filler and the fuel tank, the on-off valve mechanism being opened when the tip of the refueling gun moves to the back side. The fuel filler structure according to claim 1 or 2, wherein: 4. The method according to claim 1, wherein an inner peripheral surface of the fuel filler is treated to reduce friction with an outer peripheral surface of the seal member. Refueling port structure.