JPH0574952U - Switching valve device for oil supply pipe - Google Patents

Abstract

(57) [Abstract] [Purpose] It is possible to prevent the release of fuel gas into the atmosphere, and moreover, the switching operation is smooth,
To provide a switching valve device for an oil supply pipe which has low noise and excellent durability. [Structure] An operating plate 25 which rotates in conjunction with a rotating operation of a shutoff valve 2 and a reciprocating movement in association with a rotating movement of the operating plate 25 establish a communication state between a fuel tank and a canister. A switching valve 14 that selectively switches and the operating plate 2
5 has a valve drive pin 13 for converting the rotation of the valve 5 into the reciprocating movement of the switching valve 14, and the valve drive pin 13 and the valve operating plate 25
And are attracted by magnetic force.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a refueling pipe switching valve device that does not directly release gas generated in a fuel tank for an automobile to the atmosphere, for example.

[0002]

[Prior Art]

 When refueling a fuel tank used in automobiles, etc., a seal device is installed at the refueling pipe's refueling port to prevent the gas in the fuel tank from being released into the atmosphere from the refueling pipe's refueling port. Fuel pipes have been developed.

Since fuel such as gasoline has a high volatility, if the inside of the fuel tank is completely sealed, the pressure inside the fuel tank changes due to temperature changes and fuel consumption, which may cause the suction of the fuel. On the contrary, fuel is pushed out. Therefore, it is necessary to connect the inside of the fuel tank to a canister (adsorbed activated carbon for adsorbing hydrocarbons and preventing evaporation loss without being affected by moisture) and maintain a constant pressure inside the fuel tank. However, at the time of refueling, refueling fuel is rapidly supplied to the fuel tank, so if the cross-sectional area of the vent passage to the canister is small, the pressure in the fuel tank rises rapidly and fuel is not supplied smoothly. Sometimes.

Therefore, it is possible to increase the flow passage cross-sectional area of the vent passage to the canister and guide the gas in the fuel tank to the canister during refueling through the vent passage having the large flow passage cross-sectional area. Conceivable. However, if the vent passage is configured as a passage having a large cross section, the amount of fuel evaporation is promoted except when fueling, which is not preferable.

[0005]

[Problems to be solved by the device]

 Therefore, a switching valve device for a refueling pipe is being developed which has a plurality of vent passages from the fuel tank and is configured to switch the flow passage of the vent passage with a switching valve at the time of refueling and at other times. In such a switching valve device for an oil supply pipe, the switching valve is operated in synchronization with the turning operation of the closing valve provided at the oil supply port of the oil supply pipe.

However, in such an oil supply pipe switching valve device, in order to operate the switching valve in synchronization with the rotation operation of the closing valve, the switching valve device rotates in a predetermined rotation range in synchronization with the rotation of the closing valve. It requires a moving actuation plate and a valve drive pin that is pressed by the turning of the actuating plate to move in a linear direction, and the valve actuating plate does not turn freely when the stop valve closes the oil supply port. However, it has a problem of rattling due to vibration of the vehicle body and generating abnormal noise. Further, the operating plate is configured so as to come into contact with and slide into contact with the valve drive pin so as to collide with the valve drive pin only when the closing valve opens the oil supply port, and therefore wear may progress. Has the problem.

The object of the present invention was made in view of the above problems of the prior art. In a switching valve device for an oil supply pipe that operates in synchronization with the movement of a shutoff valve of the oil supply pipe, a switching operation is performed. It is intended to provide a switching valve device for a lubrication pipe that is smooth and has little noise.

[0008]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, a switching valve device for an oil supply pipe according to the present invention comprises an operating plate that rotates in conjunction with the rotational movement of a stop valve, and a reciprocating movement that interlocks with the rotational movement of the operating plate. The switching valve selectively switches the communication state between the fuel tank and the canister, and the valve drive member that converts the rotation of the operating plate into the reciprocating movement of the switching valve. It is characterized in that the member and the valve operating plate are attracted by a magnetic force.

[0009]

[Action]

 During refueling, the refueling nozzle is inserted and the stop valve is rotated to open the refueling port to supply fuel into the fuel tank, but the operating plate also rotates with the rotation of the stop valve. When the actuating plate rotates, the valve drive member, which is attracted by magnetic force to the actuating plate, is pressed and moves to move the switching valve. This switches the communication state between the inside of the fuel tank and the canister.

Since the valve drive pin and the operating plate are attracted by a magnetic force, when the refueling nozzle is pulled out, the operating plate also returns to its original position and rotates as the closing valve rotates in the closing direction. The operating plate maintains a state in which it is attracted to the valve driving member. Therefore, the operating plate does not vibrate due to vibration or the like, and the generation of abnormal noise can be suppressed, and at the same time, wear of the operating plate and the valve drive member can be prevented and durability can be improved.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a switching valve device for an oil supply pipe according to an embodiment of the present invention, and FIG. 2 is a sectional view showing a state in which an oil supply nozzle is inserted in the switching valve device for an oil supply pipe according to the embodiment. FIG. 2 is a plan view of the switching valve device from the direction along the line AA shown in FIG. 1.

As shown in FIGS. 1 and 2, a guide 1 for guiding an oil supply nozzle is provided inside a filler tube 5 that constitutes an oil supply pipe 40 according to this embodiment. The guide 1 is made of, for example, synthetic resin or metal, and is fitted to the filler tube 5 on the oil supply inlet side. The guide 1 is equipped with a packing 3 that seals the gap between the fuel filler ports when the fuel filler nozzle is inserted into the fuel filler port 5a. By this packing 3, the inside of the oil supply pipe 40 and the outside air are shut off, and it is possible to prevent the gas from escaping into the atmosphere during refueling. The fuel supplied from the fuel filler port 5 a is introduced into the fuel tank 6 through the main passage 8 formed inside the fuel filler pipe 40.

A fuel cap (not shown) is attached to the end of the filler tube 5 on the fuel inlet side via a filler neck 23. In this embodiment, the stop valve 2 is provided in order to further suppress the evaporation of fuel. The stop valve 2 is pivotally supported by the filler tube 5 and is rotatable, and when the refueling nozzle 4 is not inserted into the refueling port 5a, it comes into contact with the packing 3 attached to the guide 1, The inside of the oil supply pipe 40 is sealed. The stop valve 2 is biased by a torsion spring 7 in a direction to close the oil supply port 5a. When the oil supply nozzle 4 is inserted, the stop valve 2 is opened against the elastic force of the torsion spring 7. However, when the refueling nozzle 4 is pulled out, the closing valve 2 again comes into pressure contact with the packing 3 by the elastic force of the torsion spring 7 to seal the inside of the refueling pipe 40.

In the present embodiment, the switching valve device 41 is mounted near the fuel supply port of the fuel supply pipe 40 in which the main passage 8 leading to the fuel tank 6 is formed. The switching valve device 41 is connected to a first vent passage 10 that communicates with the upper space of the fuel tank 6 and a second vent passage 11 that also communicates with the upper space of the fuel tank 6. Further, as shown in FIG. 3, a canister communication passage 42 leading to the canister is also connected.

The second vent passage 11 has a larger inner diameter than that of the first vent passage 10, and the switching valve device 41 switches the communication state to the canister communication passage 42. is doing.

The switching valve device 40 has a casing 12 attached to the outer periphery of the filler tube 5. Inside the casing 12, there are formed a first flow passage region 9 and a second flow passage region 17 which can communicate with each other through the slot port 15. In this flow passage region, a switching valve 14 is linearly moved by a valve drive pin 13 as a valve drive member so as to open and close a slot port 15 that divides the first flow passage region 9 and the second flow passage region 17. It is attached so that it can be moved back and forth.

The first flow path region 9 is adapted to communicate with the canister communication passage 42 shown in FIG. Further, the second flow passage region 17 communicates with the second vent passage 11 having a relatively large diameter. Further, by mounting the switching valve inside, the third flow passage region 18 formed in the central portion of the first flow passage region 9 communicates with the first vent passage 10 having a relatively small diameter. There is. The first flow passage region 9 and the third flow passage region 18 can communicate with each other through a switching opening 21 that opens and closes according to the reciprocating movement of the switching valve 14. The switching opening 21 is formed in a gap between the annular ridge 22 provided above the inside of the casing 12 and the upper end of the switching valve 14, and is closed by abutting them, and these are separated from each other. Open. The annular raised portion 22 is not always necessary, and the switching opening 21 may be configured by a gap between the upper end of the switching valve 14 and the upper wall surface of the casing 12.

The switching valve 14 uses, for example, a coil spring 16 to close the slot port 15, that is, the second flow passage region 17 communicating with the second vent passage 11 and the first flow passage region communicating with the canister communication passage 42. It is urged by a spring in the direction to cut off communication with 9. Alternatively, the coil spring 16 may not be provided, and the switching valve 14 may be configured to move in the direction of closing the slot port 15 only by the gravity of the switching valve 14.

The lower part of the slot port 15 communicates with the second flow channel region 17 communicating with the second vent channel 11, and the upper part of the slot port 15 communicates with the canister communication channel 42 with the first channel region. I am familiar with 9.

As shown in FIG. 2, when the valve drive pin 13 rises, the upper end of the switching valve 14 and the annular ridge 22 come into contact with each other. As a result, the switching opening 21 is closed, the communication state between the first vent passage 10 and the first flow passage region 9 is blocked, and on the contrary, the slot opening 15 is opened.

The tip of the valve drive pin 13 faces the main passage 8 in the oil supply pipe 40 from the lower part of the switching valve device 41, and when the above-mentioned shutoff valve 2 is opened, the shutoff valve 2 is rotated. It is pushed up by the actuating plate 25 which rotates.

The operating plate 25 is spring-biased in the clockwise direction in the figure by an operating spring 29 interposed between the operating plate 25 and the closing valve 2, and when the closing valve 2 opens, the operating spring The elastic force of 29 pushes up the valve drive pin 13 in the direction of the valve drive pin 13, and after contacting the valve drive pin 13, the elastic force of the actuating spring 29 pushes up the valve drive pin 13 (see FIG. 2).

On the other hand, when the shutoff valve 2 is closed, the valve drive pin 13 is lowered again by the coil spring 16 attached to the switching valve 14, and the slot port 15 is closed. In particular, in the switching valve device of the present embodiment, the magnetic body 30 is attached to the tip of the valve drive pin 13, while the magnetic body 31 is magnetized to the operating plate 25 in a magnetic pole different from the magnetic body 30 on the valve drive pin side. Is attached. For example, when the magnetic body 30 on the valve drive pin side is the N pole, the magnetic body 31 on the operating plate side is the S pole, and conversely, when the magnetic body 30 on the valve drive pin side is the S pole, the operating plate side is The magnetic body 31 is the N pole. Note that either one of the magnetic bodies may be a simple magnetic body having no polarity. Further, the valve driving pin 13 and the actuating plate 25 themselves may be integrally formed of a magnetic material without providing the magnetic bodies 30 and 31, so that they are attracted.

Although the operation plate 25 is restricted from rotating in the clockwise direction of the drawing by the operation spring 29, it is not restricted in the counterclockwise direction. Therefore, when the shut-off valve 2 is closed (see FIG. 1), the operating plate 25 tries to return to a position where it comes into contact with the operating spring 29 by its own weight. In order to suppress the return to the original position due to its own weight, in this embodiment, the attraction force of both the magnetic bodies 30 and 31 is set to be larger than the original position return force of the operating plate 25 due to its own weight. Further, the mounting positions of both the magnetic bodies 30 and 31 are set such that the magnetic body 30 on the valve drive pin side comes into contact with the magnetic body 31 on the operating plate side as the shutoff valve 2 rotates. ing. Therefore, even if the oil supply nozzle 4 is inserted into the filler tube 5 to open the stop valve 2 and the switching valve 14 is operated, and then the oil supply nozzle 4 is pulled out, the magnetic plates 30 and 31 cause the operating plate 25 to operate. Will remain adsorbed to the valve drive pin 13.

In the figure, “20” is an emergency relief valve, which is biased by a coil spring 26 in a direction to close the opening 27. The region 28 where the coil spring 26 is provided communicates with the outside air. The spring constant of the coil spring 26 is set so as to open the relief valve 20 in the abnormal case when the oil supply overflows into the main passage 8.

Although not shown, the main passage 8 communicating with the fuel tank 6 may be provided with a passage that is in constant communication with the canister.

Next, the operation will be described. At the time of refueling, the refueling nozzle 4 is inserted into the filler tube 5 to open the stop valve 2 to supply the fuel into the fuel tank 6, but with the rotation of the stop valve 2, the operating spring 29 also rotates and operates. Push up the plate 25. The actuated plate 25 thus pushed up pushes up the valve drive pin 13, and as shown in FIG. 2, the movement of the valve drive pin 13 opens the slot port 15 and simultaneously closes the switching opening 21. As a result, the second vent passage 11 communicates with the canister communication passage 42 via the second flow passage region 17 and the first flow passage region 9. As a result, even if fuel is rapidly supplied into the fuel tank 6 at the time of refueling, the air in the fuel tank 6 passes through the second vent passage 11 and is guided from the slot port 15 to the canister communication passage 42. The fuel tank 6 is guided to the canister or the like, and the inside of the fuel tank 6 is depressurized so that the fuel can be smoothly supplied.

On the other hand, except when fueling, it is necessary to suppress the evaporation amount of fuel as much as possible, so the first vent passage 10 having a small inner diameter and the canister communication passage 42 are switched to communicate with each other. That is, as shown in FIG. 1, when the refueling nozzle 4 is pulled out and the fuel cap is mounted, the stop valve 2 contacts the packing 3 by the torsion spring 7. At the same time, the actuating spring 29 that rotates together with the closing valve also rotates and the external force that pushes up the valve drive pin 13 is removed, and the valve drive pin 13 moves downward in the figure. As a result, the slot port 15 is closed by the switching valve 14, and at the same time, the switching opening 21 is opened, and as a result, the first vent passage 10 is opened through the area 18, the switching opening 21 and the first flow path area 9. It will communicate with the canister communication passage 42.

When the inside of the fuel tank 6 is sealed as described above, the first vent passage 10 having a small inner diameter and the canister communication passage 42 are communicated with each other to adjust the pressure in the fuel tank and The amount of evaporation of is suppressed as much as possible.

In particular, in the switching valve device of the present embodiment, even when the fuel nozzle 4 is pulled out and the fuel tank is sealed, the operating plate 25 is attracted to the valve drive pin 13 by the magnetic bodies 30 and 31, so that Since the operating plate 25 does not vibrate due to the vibration of the above, the generation of abnormal noise can be prevented. Further, by this, it is possible to prevent a collision between the operating plate 25 and the valve drive pin 13, and it is possible to prevent deterioration of durability due to wear of these parts.

It should be noted that the present invention is not limited to the above-described embodiments, but can be modified in various ways. For example, in the above-described embodiment, the first vent passage and the second vent passage each have one passage, but each or only one may have a plurality of passages.

[0032]

[Effect of the device]

 In the refueling pipe switching valve device of the present invention, the switching valve is operated in synchronism with the insertion / removal of the refueling nozzle. It is possible to introduce a relatively small amount of fuel gas in the fuel tank to the canister. Therefore, the fuel gas is not wasted, and at the time of refueling, the fuel can be smoothly refueled from the refueling port of the refueling pipe. Also, the fuel gas in the fuel tank is not released into the atmosphere at the time of refueling or at other times, which is convenient in terms of pollution control.

Further, since the valve driving pin for driving the switching valve and the operating plate are magnetically attracted, even if the fuel tank is pulled out and the fuel tank is sealed, the operating plate vibrates due to vibration of the automobile or the like. It is possible to effectively prevent the generation of abnormal noise. Further, this makes it possible to prevent a collision between the operating plate and the valve drive pin, and improve the durability of these parts.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an oil supply pipe switching valve device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state in which an oil supply nozzle is inserted in the oil supply pipe switching valve device of the embodiment.

FIG. 3 is a plan view of the switching valve device taken along the line AA shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Guide, 2 ... Stop valve, 3 ... Seal packing, 4 ... Oil supply nozzle, 5 ... Filler tube 5a ... Oil supply port 6 ... Fuel tank, 7 ... Torsion spring 8 ... Main passage, 9 ... 1st flow path area, 10 ... first vent passage, 11 ... second vent passage, 12 ... casing 13 ... valve drive pin, 14 ... switching valve, 15 ... slot port, 16 ... coil spring, 17 ... second flow passage region, 18 ... third flow passage Region, 20 ... Relief valve, 21 ... Switching opening, 22 ... Annular ridge, 23 ... Filler neck, 24 ... Spacer, 25 ... Operating plate, 26 ... Coil spring, 27 ... Opening, 28 ... Region, 29 ... Operating spring, 30, 31 ... Magnetic material, 40 ... Oil supply pipe, 41 ... Switching valve device, 42 ... Canister communication passage.

Claims (1)

[Scope of utility model registration request] 1. A main passage (8) leading to a fuel tank (6).
And a fuel supply pipe (40) having a shut-off valve (2) which has a )
A switching valve device for an oil supply pipe attached to an operating plate (2) that rotates in conjunction with rotation of the stop valve (2).
5) and by reciprocating in conjunction with the rotation of the actuating plate (25), the communication state between the fuel tank and the canister is
A switching valve (14) for selectively switching and a valve driving member (13) for converting the rotation of the operating plate into reciprocating movement of the switching valve (14), and the valve driving member (13) and the valve. A switching valve device for an oil supply pipe in which the operating plate (25) is attracted by magnetic force.