JP2011201408A - Oil feeding structure of fuel tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil feeding structure of a fuel tank capable of reliably recovering oil accidentally spilt from a fuel oil feeding port, and preventing hot air from being blown by a fuel cap covering the fuel oil feeding port.SOLUTION: A fuel oil feeding port 16 of a fuel tank is made to face an oil feeding opening 19 formed at a bonnet 5 covering an engine with a gap 19a from a peripheral edge of the oil feeding opening 19. An oil receiving tray 22 for recovering fuel leaked from the fuel oil feeding port 16 is provided below the oil feeding opening 19, and a collar-like lip 30 covering the fuel oil feeding port 16 is provided at the fuel cap 20 so as to block the gap 19a with the lip 30.

Description

  The present invention relates to a fuel supply structure for a fuel tank that can guide and discharge fuel overflowed from a fuel tank to an oil receiving tray during fuel supply.

  2. Description of the Related Art Conventionally, a fuel tank installed in a tractor has a fuel supply port facing a fuel supply opening (hole) formed in a dashboard, and a gap provided between the periphery of the fuel supply opening and the outer periphery of the fuel supply port In addition, an oil supply structure in which an annular rubber lid is provided and closed is known (for example, Patent Document 1).

Japanese Utility Model Publication No. 52-128214

The fuel tank refueling structure disclosed in Patent Document 1 prevents the blowing of hot air after cooling the engine by an annular rubber lid, and allows the fuel spilled from the fuel refueling port to be circulated annularly when refueling the fuel tank. The rubber lid prevents the flow into the inside and allows it to flow on the hood.
However, since the fuel spilled during refueling flows on the dashboard through the annular rubber lid, there is a drawback that it must be wiped off later. In addition, it is necessary to attach an annular rubber lid to the oil supply opening, which increases the cost.
In order to improve this, as shown in FIG. 5, a doughnut-shaped seal S made of a rubber material is joined to the periphery of a large-diameter oil supply opening 19, and the gap between the inner periphery and the oil supply port cylinder 21 is joined. It is also known to narrow the gap 19a.
However, in this case, dust or the like entering from the gap 19a can be reduced by the seal S. However, when the fuel overflows at a large amount, the fuel cannot overflow into the gap 19a and is transmitted through the seal S to the bonnet 5. In the oil supply opening 19 and the blowing of hot air from the oil supply opening 19 cannot be prevented.

  In order to solve the problem, the present invention provides a gap 19 a between the fuel filler opening 16 of the fuel tank 9 and the fuel filler opening 19 formed in the bonnet 5 covering the engine 13 and the periphery of the fuel filler opening 19. An oil receiving tray 22 for collecting the fuel leaked from the fuel filler opening 16 is installed below the fuel filler opening 19 and provided with a hook-like lip 30 on the fuel cap 20 that covers the fuel filler opening 16. And the gap 19a is closed by the lip 30.

According to the present invention, since the gap between the fuel supply opening of the bonnet and the fuel supply port is closed by the lip provided in the fuel cap, hot air can be prevented from blowing out from the gap.
Also, by removing the fuel cap, this gap can be opened, so that oil spilled from the fuel filler port during refueling can be received and discharged by the oil receiving tray provided below, and spilled fuel There is no trouble of wiping off.
Further, since the lip that closes the gap is provided in the fuel cap itself, the cost does not increase.

It is a side view of a tractor. It is a top view of a tractor. It is a perspective view which shows the fuel supply structure of a fuel tank. It is side sectional drawing which shows the principal part of an oil supply structure. It is a sectional side view which shows the conventional oil supply structure.

An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes an agricultural tractor (work vehicle). The tractor 1 is provided with a traveling body 3 having front wheels 2 and rear wheels 2a on the front, rear, left and right, and an engine 4 is disposed from the front side and covered with a bonnet 5, and behind A steering unit 6 including a handle, a seat, and the like is provided, and a connecting unit 7 for mounting a work machine such as a tillage device is provided at the rear of the machine body.
In this tractor 1, a fuel tank 9 that supplies fuel to the engine 4 is disposed in a dashboard 10 that follows the hood 5 at the rear of the engine 4, and a fuel supply section 11 that supplies fuel to the fuel tank 9 is provided. It is provided at the rear part of the bonnet 5. The bonnet 5 covers the upper side of the engine 4 and can open the front part around the rear hinge.

As shown in FIGS. 3 and 4, the fuel tank 9 is attached to a gate-type mounting frame 15 attached to the engine 4 below the dashboard 10 following the bonnet 6. The base of an elbow-shaped oil supply pipe 17 is attached to the upper part.
A base 21 provided at the upper portion of the fuel supply pipe 17 forms a fuel supply port 16. A fuel supply opening 19 is provided near the rear right side of the bonnet 5, and a gap 19 a is provided between the periphery of the bonnet 5 and the fuel supply port 16. The fuel filler port 16 is covered with a fuel cap 20.

  A donut disk-shaped oil receiving tray 22 for collecting fuel spilled during refueling is provided on the outer periphery of the middle portion of the base 21. The oil receiving tray 22 has an oil discharge port 23 opened downward at the bottom, and the fuel recovered from the oil discharge port 23 is discharged outside the machine through an oil discharge pipe 24. The base 21 is supported on the mounting frame 15 via mounting arms 15a.

The oil supply opening 19 is a hole having a sufficiently large gap 19a through which oil flowing out from the fuel supply port 16 during refueling can flow to the oil receiving tray 22 side without flowing over the bonnet 5.
The base 21 has a breather hole 25 opened laterally at the lower part of the oil receiving tray 22 in the middle of the cylinder, and the breather pipe 26 through the breather hole 25 and the upper part of the fuel tank 9. Is in communication. The base 21 is fitted with a mesh-like filter 27 that is detachably inserted into the fuel supply port 16.

  The fuel cap 20 is integrally formed with a bowl-shaped lip 30 that can cover the gap 19a from above at the lower outer periphery of the cap body 29 that engages the base 21 and closes the fuel filler opening 16. Yes. As a result, as shown in FIG. 4, the fuel cap 20 covers the gap 19a because the outer peripheral end of the lip 30 overlaps the bonnet 5 in the state where the fuel filler port 16 is covered, so that hot air generated in the bonnet 5 is blown out. It can be prevented by the lip 30. Further, when the fuel cap 20 is disengaged from the base 21 and removed from the fuel filler port 16, the gap 19a can be easily opened, and oil spilled from the opened gap 19a can be supplied to the oil receiving tray 22. Can be recovered.

The lip 30 protruding to the lower part of the fuel cap 20 is preferably formed so as to gradually become thinner from the base side toward the outer peripheral end. In this case, the cap body 29 and the lip 30 are made of the same synthetic resin material. Can be formed integrally, and flexibility and elasticity can be easily imparted to the lip 30. When a conventional fuel cap is used, the lip 30 can be formed by attaching a flexible disk-like member (seal member) to the lower part of the outer periphery.

The tractor 1 having the fuel supply structure configured as described above can open the gap 19a by removing the fuel cap 20, and in this state, a fuel supply pump or a funnel is inserted into the fuel supply port 16 and prepared. Fuel is supplied to the fuel tank 9 from the fuel supply tank.
In such a refueling operation, when the fuel overflows, the spilled oil is transferred to the oil receiving tray 22 through the base 21 through the gap 19a. Therefore, the spilled oil is reliably recovered without wetting or fouling the bonnet 5 and can be discharged from the oil discharge port 23 through the oil discharge pipe 24 to a predetermined position outside the machine.

  When the fuel cap 20 is again put on the fuel filler opening 16 and covered, the lip 30 can simultaneously close the gap 19a. As a result, the hot air that is about to blow out from the gap 19a is blocked by the lip 30 of the fuel cap 20, so that blowing out is prevented. Further, since the lip 30 for closing the gap 19a can be easily provided in the process of manufacturing the fuel cap 20, a simple and inexpensive oil supply structure can be provided without adding a special sealing part to the gap 19a as in the conventional case. be able to.

  When the bonnet 5 is opened, the peripheral edge of the oil supply opening 19 abuts on the lip 30, but the lip 30 has flexibility, so it is curved and passes through the oil supply opening 19. Further, when the flexibility of the lip 30 is small, the lip 30 may be slightly smaller in diameter than the hole of the oil supply opening 19.

1 Tractor (work vehicle)
5 Bonnet 11 Fuel tank 16 Fuel supply port 19 Oil supply opening 19a Clearance 20 Fuel cap 22 Oil receiving tray 30 Lip

Claims (1)

A gap (19a) is formed between the fuel filler opening (16) of the fuel tank (9) and the fuel supply opening (19) formed in the bonnet (5) covering the engine 13 and the periphery of the fuel supply opening (19). An oil receiving tray (22) for collecting fuel leaked from the fuel filler opening (16) is installed below the fuel filler opening (19), and the fuel filler opening (16) is covered. An oil supply structure for a fuel tank, wherein a flange lip (30) is provided on the fuel cap (20), and the gap (19a) is closed by the lip (30).