JPH04132815U - Fuel tank vent cut valve structure - Google Patents

Abstract

(57) [Summary] [Purpose] To maintain the airtightness of the filler tube and prevent fuel from flowing out even if a large input is applied to the vent cut valve mounting part during a vehicle side collision. [Structure] A mounting portion 16 of a casing 11 is fixed to a bracket 25 of a filler tube 2 with screws 15.
A valve body 13 that opens and closes between a pair of ports 12 connected to the vent tube 4 is disposed inside the casing 11, and a receiving portion 22 at the end of the rod 20 of the valve body 13 has a head portion of the split rod 21. 23 are arranged facing each other. The split rod 21 is temporarily disposed within the rotation range of the shutter 9 within the filler tube 2 while being sealed by a seal rubber 26 held between the casing 11 and the filler tube 2. A notch 27 is formed in the casing 11 near the attachment portion 16 so that when an impact force is applied, the casing 11 separates and ruptures at the notch 27 to prevent damage to the filler tube 2.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is related to the vent cut valve structure of fuel tanks for automobiles, etc. It is something that

0002

[Conventional technology]

For example, in some automobile fuel tanks, evaporation from the filler tube occurs when refueling. In order to prevent the outflow of generated fuel, there is a structure shown in FIG. 5.

0003 In the same figure, the upper wall of the tank body 1 has an evaporative port connected to the canister 5. The filler tube 2 is connected to the filler tube 3 and is attached to the tank body 1. Connect the vent tube 4 that communicates with the atmosphere through the canister 6 to the insertion 2a of 7. It has been done.

0004 A seal member 8 is attached to the inner peripheral surface of the insertion portion 2a of the filler tube 2 for the fuel gun 7. A cylinder is provided at the terminal of the insertion section 2a and is biased in a direction to close the insertion section 2a. A shutter 9 is attached.

[0005] When the shutter 9 is opened, the vent tube 4 and the filter are inserted into the vent tube 4. A vent cut valve 10 is provided to communicate with the inner tube 2.

[0006] The vent cut valve 10 is fixed to the filler tube 2 as shown in FIG. The casing 11 has a pair of ports 12 connected to the vent tube 4, It is equipped with a valve body 13 that is biased in the closing direction by a spring S. The rotation range of the shutter 9 inside the filler tube 2 is The shutter 9 is pushed open by the nozzle 7a of the refueling gun 7. When oil is present, the valve body 13 opens and connects each port 12, that is, the vent tube 4, to the (This structure is, for example, disclosed in Japanese Unexamined Patent Application Publication No. 1999-1991). 44327).

[0007]

[Problem that the idea aims to solve]

However, in the above conventional fuel tank vent cut valve structure, The insertion part 2a of the nozzle 7a of the refueling gun 7 of the filler tube 2 is near the outer panel of the vehicle body. Due to the arrangement, the filler of the vent cut valve 10 is installed in consideration of vehicle side collision. -Increasing the mounting strength to the tube 2, or increasing the strength of the vent cut valve 10 itself. It is necessary to use materials such as metal to increase the There is a problem.

[0008] Therefore, this idea was developed to ensure that the attachment part to the filler tube remains intact even in the event of a vehicle collision. Fuel tank vent cup that is not damaged and can be manufactured cheaply. This provides a valve structure.

[0009]

[Means to solve the problem]

The casing is attached to the filler tube and connected to the vent tube. A pair of ports are provided, and each port is configured to be openable and closable by the valve body. Split a part of the rod into the filler tube and use this split rod to rotate the shutter inside the filler tube. A large input power source is installed near the attachment point of the casing to the filler tube. The casing was separated into the port side and the filler tube installation side when There is a notch to cut it off.

0010

[Effect]

When refueling, the nozzle of the refueling gun is inserted into the filler tube and the shutter is pressed. When opened, the valve body is pushed through the split rod, allowing communication between each port and venting. Open the tube, while filling the refueling gun nozzle at the end of refueling the filler tube When removed from the valve, the shutter closes, which causes the valve body to shut off the vent tube. .

[0011] Here, if a large input is applied to the casing from the outside, the notch part of the casing will Stress concentration occurs, and from this notch, the casing moves toward the port side, leaving the valve body. and the filler tube attachment side with the split rod remaining.

0012 Therefore, the attachment part of the filler tube in the casing is It does not separate and prevents fuel from flowing out from the filler tube attachment point.

[0013]

【Example】

Hereinafter, one embodiment of this invention will be described with reference to FIG. 5 and the drawings.

[0014] In Figures 1 to 3, 2 indicates the filler tube attached to the tank body 1. However, a vent tube 4 is connected to this filler tube 2.

[0015] Inside the filler tube 2, a shutter is inserted into the insertion part 2a of the nozzle 7a of the refueling gun 7. A vent cut valve 10 is installed near the location of the shutter 9. It is attached.

[0016] The vent cut valve 10 has a valve body 13 inside a casing 11 made of resin. A pair of ports 12, 12 connected to the vent tube 4 and a filler - The tube 2 is provided with a mounting portion 16 that is secured to the tube 2 with screws 15.

[0017] The valve body 13 has a spring connecting passage 17 that communicates between the ports 12, 12. It is composed of a diaphragm 19 that closes due to the elastic force of the rod 18 and a rod 20. , a splitting rod 21 is linked to the rod 20.

[0018] The rod 20 has one end fixed to the diaphragm 19 and has an arcuate receiving part 22 at the other end. are doing.

[0019] Furthermore, the split rod 21 has one end of the head 23 that comes into contact with the receiving portion 22 of the rod 20. In preparation for this, the other end of the filler tube 2 passes through the lower wall 11a of the casing 11. It is temporarily arranged in the rotation range of the cutter 9.

[0020] Here, the insertion portion 24 of the split rod 21 is formed as an opening in the filler tube 2. A bracket 25 is welded and fixed to the side of this insertion part 24, and this bracket The casing 11 is fixed to the kit 25 with screws 15. This casing 1 1 and the bracket 25 of the filler tube 2, there is a A sealing rubber 26 which is in close contact with each other is clamped and fixed.

[0021] The casing 11 is provided with a large input power to the casing 11 near the mounting portion 16. The casing 11 is separated into the port 12 side and the mounting part 16 side when A notch 27 is provided to allow the

[0022] According to the structure of the above embodiment, the nozzle 7a of the refueling gun 7 is filled with filler when refueling. When the tube 2 is inserted into the insertion opening 2a, the shutter 9 opens as shown in FIG. Since the split rod 21 is pressed by this, the spring 1 is pushed through the rod 20. 8, the diaphragm 19 opens the communication path 17, so that the vent tube 4 and the filler - communicates with tube 2 to ensure vent action.

[0023] After refueling, insert the nozzle 7a of the refueling gun 7 into the insertion port 2a of the filler tube 2. When the rod is pulled out from the The diaphragm 19 closes the communication path 17 by the spring 18 through the vent. Tube 4 is blocked.

[0024] Here, if a large input is applied to the casing 11 due to a vehicle side collision, etc. The input load concentrates stress on the notch 27 of the casing 11, and as shown in FIG. The thing 11 is located on the side of the port 12 where the rod 20 of the valve body 13 remains, with the notch 27 as the border. and the mounting portion 16 side, leaving the split rod 21.

[0025] Therefore, the mounting portion 16 side of the casing 11 should not be separated from the filler tube 2. Therefore, the airtightness of the filler tube 2 is maintained, and the insertion part of the filler tube 2 is 24 will not be exposed and the evaporated fuel will not flow out to the outside.

[0026] As a result, in order to increase the strength of the casing 11, the casing 11 is made of metal. There is no need to form or increase the mounting strength of the mounting part 16, and the cost of using resin etc. is eliminated. It can be formed from a material that can reduce costs.

[0027]

[Effect of the idea]

As explained above, this idea creates a large load on the casing. When used, stress concentration occurs at the notch, and the casing Since the filler tube is separated into the port side and the mounting part side, there is a split rod on the filler tube side. The filler tube will not be damaged because the casing attachment part remains together with the filler tube. Therefore, it has the effect of preventing evaporated fuel etc. from flowing out. Ru.

[0028] Therefore, on the casing itself or on the filler tube of the casing. In order to increase the mounting strength of Since a fat material can be used, costs can be reduced.

[Brief explanation of drawings]

FIG. 1 is a sectional view taken along line BB in FIG. 5 of an embodiment of the invention.

FIG. 2 is a sectional view showing the valve in FIG. 1 in an open state.

FIG. 3 is a sectional view showing the broken state of FIGS. 1 and 2;

FIG. 4 is an enlarged sectional view of section A in FIG. 5 of the prior art.

FIG. 5 is an overall explanatory diagram of the prior art.

[Explanation of symbols]

2... Filler tube, 4... Vent tube, 9... Shutter, 11... Casing, 12... Port, 13... Valve body, 16... Mounting part, 20... Rod, 21... Split rod,
27...notch.

Claims (1)

[Scope of utility model registration request] Claim 1: A casing attached to the filler tube is provided with a pair of ports connected to the vent tube, and each port is configured to be openable and closable by a valve body,
A part of the rod of the valve body is split and this split rod is installed within the shutter rotation range inside the filler tube, and the casing is placed near the attachment point of the casing to the filler tube, so that when a large input is received, the casing is moved to the port side. A fuel tank vent cut valve structure characterized by having a notch for separating and breaking the filler tube and the filler tube attachment side.