JP2563729Y2 - Fuel tank mounting structure for agricultural tractor - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arrangement in which a fuel tank is arranged below a step of an agricultural tractor.

[0002]

2. Description of the Related Art Conventionally, in a farm tractor, a technique of arranging a fuel tank beneath a step on which an operator puts his / her foot when riding is known. For example, Japanese Patent Publication No. 2-27195 and Japanese Patent Publication No. 3-24371.
It is like the technique described in Japanese Patent Publication No.

[0003]

However, in the above prior art, the fuel tank arranged below the step is
It was one, and the fuel capacity required for a large tractor could not be obtained. In the present invention, a plurality of fuel tanks horizontally arranged below the step are arranged and communicated with each other by a fuel extraction pipe. In addition,
Where the fuel tank is located below the step
If a fuel filler is provided directly on the fuel tank,
The position is lowered, and the refueling operation becomes difficult. Main idea
In the plan, the fuel tank should not be located below the step.
However, the fuel filler can be located above the front end of the fender
The fuel supply pipe extends upward from one fuel tank
And a refueling port is provided at the upper end thereof.

Further, when the fuel tank is arranged below the fuel tank, it is necessary to supply the fuel to the engine in the bonnet by the fuel feed pump. Space between the fuel tank and the fuel feed pump or the pump suction pipe cannot be provided between the fuel tank and the fuel tank. In the present invention, a fuel feed pump and a pump suction pipe are provided at a portion supporting a step with a step supporting frame interposed.

[0005]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. In claim 1, provided the right fuel tank 1 and the left fuel tank 2 to the vehicle body of the tractor, in the structure disposed in a substantially horizontal lateral two-position, the oil supply inlet tube 6 only one of the fuel tank 1, the Refueling introduction pipe 6 is fender 16
Near the front end of the fender 16 on the side opposite to the driver's seat 3
Extends upward along the surface of
Supports the upper end of the oil supply pipe 6 on the fixed oil supply port mounting plate 25
Then, it passes through the portion of the refueling port mounting plate 25 and the refueling introduction pipe 6
Is refueled at a position opened outside the fender 16.
The mouth 5 is provided .

According to a second aspect, the fuel according to the first aspect is provided.
In the tank mounting structure, the left and right steps 10L and 10L
R, a transmission cable such as the clutch housing 4 or the like.
Place the left and right fuel tanks 1 and 2 on both sides of the
Between the tops 10L and 10R and the upper surfaces of the fuel tanks 1 and 2.
A gap S is formed, and the step S
9 and fuel feed pump 8 and pump suction pipe 11
And are arranged .

[0007]

Next, the operation will be described. That is, in the fuel tank of the present invention, the right fuel tank 1 and the left fuel tank 2 communicate with each other by the fuel take-out pipe 12 and the air communication pipe 13 and are used as an integrated tank. The fuel supply port 5 is provided only in the right fuel tank 1, and the fuel supply port 5 is provided at an upper end of a fuel supply pipe 6 protruding from the right fuel tank 1. The refueling introduction pipe 6 rises along the inside of the fender 16R, and supports the refueling port 5 at a portion of the refueling port mounting plate 25 at the upper end. When fuel is supplied to the filler port 5, the fuel passes from the right fuel tank 1 through the fuel extraction pipe 12 and is supplied to the left fuel tank 2. Further, the fuel feed pump 8 and the pump suction pipe 11 are arranged in a space between the step and the upper surface of the fuel tank 1 where the step support frame 9 is arranged, so that the suction height of the pump suction pipe 11 is reduced, Assembly and installation are simplified.

[0008]

Next, an embodiment will be described. FIG. 1 is a side view of a driver's seat 3 portion of the tractor showing a fuel supply port in the agricultural tractor of the present invention, FIG. 2 is a plan view of the driver seat 3 portion,
3 is a rear view of the driver's seat 3, FIG. 4 is an enlarged rear view of a fuel feed pump 8, FIG. 5 is an enlarged plan view of a fuel gauge 7, and FIG. 6 is a side view of a fuel extraction pipe 12. FIG. 7 is a side view of a portion of the air communication pipe 13.

[0009] An engine is mounted on the hood portion of the agricultural tractor, and a clutch housing 4 is fixed to the rear surface of the engine. A transmission case is extended from the rear surface of the clutch housing 4 to constitute a body support member of the tractor as a whole. The driver's seat 3 is disposed above the center position of the body in which the clutch housing 4 and the transmission case are connected,
Steps 10L and 10R are arranged in a portion where the operator sitting on the driver's seat 3 places his / her feet.

The steps 10L and 10R are arranged on the left and right sides of the clutch housing 4, and the steps 10L and 10R
-The space on the lower surface of 10R is configured as the space where the fuel tanks 1 and 2 of the present invention are arranged. The fuel tank is divided into a right fuel tank 1 and a left fuel tank 2,
The fuel tank 1 and the left fuel tank 2 communicate with each other by two pipes, a fuel take-out pipe 12 and an air communication pipe 13.

The right fuel tank 1 and the left fuel tank 2 are fixed to the clutch housing 4 by projecting left and right tank mounting brackets 19L and 19R from the clutch housing 4 to the front of the right fuel tank, and to the rear of the tank mounting bracket. The projections 20L and 20R fix the clutch housing 4, the right fuel tank 1 and the left fuel tank 2 by these. An electronic fuel display device including a gauge float 22 and a fuel gauge 7 is arranged in the left fuel tank 2 on the left side, and an electronic signal is transmitted to a dashboard portion of the tractor by a wire harness. Thus, the left fuel tank 2
By providing the gauge float 22 and the fuel gauge 7 on the right side, the fuel supply port 5 is provided on the right side fuel tank 1, and when the movement of the fuel to the left side fuel tank 2 is slow, the amount of the fuel in the left side fuel tank 2 is accurately determined. Is displayed.

A fuel outlet pipe 12 connecting the right fuel tank 1 and the left fuel tank 2 at the bottom thereof is arranged to pass under the clutch housing 4. A pump suction pipe 11 branched from a center position of the fuel extraction pipe 12 communicates with a suction port of the fuel feed pump 8. The fuel oil discharged by applying pressure from the fuel feed pump 8 is supplied to the engine in the bonnet. As shown in FIG. 3, a pipe cover 15 that covers the lower part of the fuel extraction pipe 12 and the pump suction pipe 11 is provided.
Are provided from below so as to cover the lower surfaces of the right fuel tank 1 and the left fuel tank 2 below the clutch housing 4.

A fuel supply port 5 and a fuel supply pipe 6 for reinforcing fuel in the right fuel tank 1 and the left fuel tank 2 extend upward from an end of the right fuel tank 1. The fuel supply pipe 6 extends upward along the inside of the right fender 16R, and the fuel supply port 5 is formed at an upper end portion.
The filler port 5 is fixed to a filler port mounting plate 25 provided on the fender 16R. As shown in FIG. 1, the oil supply pipe 6 extends upward along a portion near the front end of the fender 16 </ b> R, and inside the oil supply pipe 6, the oil supply pipe coating the oil supply pipe 6. Cover 26 is fender 16
It is fixed inside R. The refueling introduction pipe 6 and the refueling port 5
Is opened from the portion of the fuel supply port mounting plate 25 of the right fender 16R toward the outside of the tractor.

As shown in an enlarged view in FIG. 4, a step supporting frame 9 projects right and left from the clutch housing 4, and the steps 10L and 10R are laid on the step supporting frame 9. And step 10
The fuel feed pump 8 and the pump suction pipe 11 are arranged in the gap S formed between the steps 10L and 10R and the right fuel tank 1 because the step support frame 9 is arranged below the line L and 10R. It is. Since the gap S requires the step supporting frame 9 to support the steps 10L and 10R, and is a gap that can be formed when the step supporting frame 9 is disposed, the small fuel feed pump 8 can be disposed in this part. The fuel feed pump 8 is not exposed to other parts,
Further, the suction lift of the pump suction pipe 11 can be shortened.

FIG. 5 shows a portion of the gauge float 22 and the fuel gauge 7 provided above the left fuel tank 2. The portion of the gauge float 22 floats on the oil level inside the left fuel tank 2, and when the oil level rises and falls, the gauge float 22 rotates, and the rotation angle of the gauge float 22 becomes The electric signal is changed to an electric signal by the fuel gauge 7 and the signal is transmitted from the wire harness 29 to the fuel gauge on the dashboard.

FIG. 6 shows a portion of a fuel extraction pipe 12 and a pump suction pipe 11 which communicate the lower portions of the right fuel tank 1 and the left fuel tank 2. A pipe cover 15 covering the fuel extraction pipe 12 and the pump suction pipe 11 is laid from below. By providing a connection portion between the pump suction pipe 11 and the fuel extraction pipe 12 below the center position of the tractor body, an air layer reaches the branch point even when the tractor body is greatly inclined left and right. Thus, the suction of air into the fuel feed pump 8 can be prevented. In FIG. 7, the lower end of the refueling introduction pipe 6 and the air communication pipe 1 are shown.
The arrangement of the pipes in section 3 is shown.

[0017]

[Effects of the Invention] The present invention is constructed as described above, and has the following effects. The fuel tank according to claim 1,
The fuel supply pipe 6 projects upward from the tank 1
6 rises along the side of the fender 16 opposite to the driver's seat 3
Then, the filler port 5 is supported by the filler port mounting plate 25 at the upper end.
As a result, the fuel supply pipe 6 is protected by the fender 16
Therefore, damage is reduced. Also, refueling port 5
At a high position and outside the fender 16.
So that the refueling port 5 can be
It can be placed . In addition, provision of refueling port 5
When the tractor leans in the direction
A situation where the oil level rises near the filler port 5 occurs,
In this case, fuel may leak from the filler port 5,
In the invention, since the length of the refueling introduction pipe 6 is long,
The rising state of the oil level occurs only up to this point.

According to the second aspect of the present invention, the head of the fuel feed pump 8 sucked by the pump suction pipe 11 is reduced, so that suction resistance can be reduced and a low-performance pump can be supplied. Also, the durability of the fuel feed pump 8 could be improved.
Further, since the fuel feed pump 8 and the pump suction pipe 11 are arranged by using the arrangement space of the step support frame 9 which is absolutely necessary for mounting the steps 10L and 10R, the dead space can be effectively used. . Further, the pump suction pipe 11 can be protected by the step support frame 9, the steps 10L and 10R, and the right fuel tank 1.

[Brief description of the drawings]

FIG. 1 is a side view of a driver's seat 3 of a tractor showing a fuel supply port of the agricultural tractor of the present invention.

FIG. 2 is a plan view of a driver's seat 3 part.

FIG. 3 is a rear view of the driver's seat 3;

FIG. 4 is an enlarged rear view of a portion of a fuel feed pump 8;

FIG. 5 is an enlarged plan view of a part of a fuel gauge 7;

FIG. 6 is a side view of a portion of a fuel extraction pipe 12;

FIG. 7 is a side view of the air communication pipe 13;

[Description of Signs] S Gap 1 Right fuel tank 2 Left fuel tank 3 Driver's seat 4 Clutch housing 5 Filling port 6 Fuel supply pipe 7 Fuel gauge 8 Fuel feed pump 9 Step support frame 10L / 10R Step 11 Pump suction pipe 12 Fuel take-out Pipe 22 gauge float

Claims (2)

(57) [Scope of request for utility model registration] The method according to claim 1] right fuel tank 1 and the left fuel tank 2 to the vehicle body of the tractor, in the structure disposed in a substantially horizontal lateral two-position, the oil supply inlet tube 6 provided only on one of the fuel tank 1, the oil supply Inlet pipe 6 is near the front end of fender 16
Position, along the surface of the fender 16 opposite the driver's seat 3
Refueling extending upward and fixed to the upper end of the fender 16
The upper end of the refueling introduction pipe 6 is supported by the port mounting plate 25, and the refueling port is
After passing through the mounting plate 25, the fuel supply pipe 6 is connected to the fender 1
A fuel tank mounting structure in an agricultural tractor, characterized in that a fuel supply port 5 is provided at a position opened on the outside of the tractor 6. 2. The fuel tank mounting structure according to claim 1, further comprising:
The left and right fuel tanks 1 and 2 are arranged on both sides of the transmission case such as the clutch housing 4 and the like.
A tractor for agricultural use, wherein a gap S is formed between the fuel tank 1 and the upper surfaces of the fuel tanks 1 and 2, and a step support frame 9, a fuel feed pump 8, and a pump suction pipe 11 are arranged in the gap S. Fuel tank mounting structure.