JP4627934B2 - Tractor fuel tank - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a fuel tank installed in a dashboard portion of a tractor.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, it has been publicly known that a fuel tank is configured by combining a plurality of members by dividing the fuel tank into two or plural. The mating surfaces of the fuel tank made up of a plurality of members have substantially the same shape to ensure capacity and prevent leakage. A technique for arranging a fuel tank by dividing a plurality of tanks is also known.
[0003]
[Problems to be solved by the invention]
However, in order to attach the fuel tank to the fuselage, it is necessary to form a flange portion on the mating surface and fix the flange portion to the bracket, which increases the number of parts such as a fixing member, a bracket, and a support member. It ends up. Furthermore, when the capacity of the fuel tank is increased, it is necessary to increase the strength of the bracket. For this reason, the bracket has been increased in size, increased in weight, and further increased in supporting members. .
In addition, in order to increase the capacity of the fuel tank, if it is configured with multiple tanks, if the fuel tanks are arranged on both the left and right sides, the tank that supplies fuel to the engine when the tractor tilts, the other tank It may be difficult to supply fuel to the engine. In addition, when the fuel tank divided into two is disposed at a remote position, there is a problem that the piping becomes complicated.
[0004]
[Means for Solving the Problems]
The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.
[0005]
That is, in claim 1, in the fuel tank of the tractor in which the fuel tank is divided into two, the fuel tank is divided into a front tank and a rear tank, the front tank is disposed in the hood, the rear tank is disposed in the dashboard , A plate is interposed between the front tank and the rear tank, the plate is used as a shielding member for the engine room and the operating unit, a pedal bracket is fixed to the plate, and a mounting portion for the rear tank is provided above the pedal bracket. It is formed .
[0006]
According to a second aspect of the present invention, the capacity of the front tank is made smaller than the capacity of the rear tank.
[0007]
According to a third aspect of the present invention, the lower end of the front tank is configured to be positioned below the lower end of the rear tank.
[0008]
According to a fourth aspect of the present invention, the front tank is disposed biased toward the intake side of the engine.
[0009]
According to a fifth aspect of the present invention, the rear tank is connected to a pipe for feeding return fuel from the fuel supply device of the engine.
[0010]
According to a sixth aspect of the present invention, a convex diaphragm matching the shape of the rear tank is formed on the plate.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the invention will be described. 1 is an overall side view of the tractor according to the present invention, FIG. 2 is a partial side view of the tractor showing the arrangement structure of the fuel tank according to the present invention, FIG. 3 is a plan view of the fuel tank, and FIG. 5 is a front view, FIG. 6 is a rear view, FIG. 7 is a perspective view, and FIG. 8 is a perspective view.
[0012]
First, the overall structure of the tractor will be described with reference to FIG. The tractor 1 supports a front wheel 2 at a front portion and a rear wheel 3 at a rear portion, houses an engine 5 in a bonnet 4 on an engine frame 8, and a clutch housing is fixed to a rear surface of the engine 5. On the rear surface of the clutch housing, a transmission case 11 is extended to constitute a body support member of the tractor 1 as a whole. A dashboard 23 is connected to a rear portion of the bonnet 4 via an air cut plate 24 serving as a shielding plate, which will be described later. A steering handle 6 is disposed on the dashboard 23, and a hydraulic cylinder case is disposed on the transmission case 11. 10 is placed, and a driver's seat 7 is disposed above the hydraulic cylinder case 10. A main transmission lever, a position lever, a draft lever, and the like are disposed on the side of the driver's seat 7.
[0013]
Lift arms 19 and 19 are projected rearward from the hydraulic cylinder case 10 side, and a work machine mounting device 13 including top links 20 and 20 and lower links 21 and 21 is mounted at the rear of the machine body. The working machine mounted on the work mounting device 13 can be moved up and down by interposing a lift rod between the lower links 21 and 21 and the lower links 21 and 21.
[0014]
An outline of the arrangement structure of the bonnet portion on which the engine is mounted is shown below with reference to FIG. A bottom plate is fixed to the front portion of the engine frame 8, and a battery 26 is placed and fixed to the front portion of the bottom plate. A radiator 27 is erected on the rear portion, and a cooling fan 28 is disposed on the rear portion. The engine 5 is supported on the left and right engine frames 8 in an anti-vibration manner behind the engine frame 8. An air cut plate 24 is provided upright on the front part of the clutch housing 22 at the rear part of the bonnet 4 as a shielding member for both heat insulation and sound insulation. The fuel tank 25 according to the present invention is fixed to the air cut plate 24.
[0015]
The fuel tank 25 includes a front tank 29 and a rear tank 30. The front tank 29 is fixed to the hood 5 side (front side) of the air cut plate 24, and the rear tank 30 is fixed to the clutch housing 22 side (rear side). The capacity of the front tank 29 is smaller than the capacity of the tank 30, and the main tank is housed in the dashboard 23 as the rear tank 30. The front tank 29 disposed in the bonnet 5 is disposed on the intake side of the engine 5 in order to reduce the capacity and avoid the influence of exhaust heat. Specifically, in this embodiment, as a multi-cylinder engine, a piston is arranged in the front-rear direction, and an intake port is arranged on the right side in the traveling direction of the cylinder block at the top of the engine, and an exhaust port is arranged on the left side. Therefore, the front tank 29 of the present embodiment is arranged on the right side of the eccentric air cut plate 24. Therefore, the fuel supplied to the engine is prevented from becoming high temperature, and a stable engine output is obtained.
[0016]
Hereinafter, the fuel tank and the air cut plate for fixing the fuel tank 25 will be described in detail with reference to FIGS. The upper portion of the air cut plate 24 has a throttle shape in accordance with the shape of the front surface of the rear tank 30. The throttle is composed of a throttle portion 39a that bulges forward in accordance with the outer peripheral shape of the rear tank 30 and a throttle portion 39b that matches the shape of the protrusion at the center of the front surface of the rear tank 30. In this way, the front portion of the rear tank 30 is just fitted into the throttle portions 39a and 39b of the air cut plate 24. Then, a band 37 is fixed to a fixing bracket 31 a formed at the upper part of a pedal bracket 31 described later and a fixing part 24 a provided at the upper left and right centers of the air cut plate 24 to fix the rear tank 30 to the rear surface of the air cut plate 24. . In this way, the number of fixing members is reduced to reduce the cost, and the number of assembly steps is reduced. Moreover, the rigidity of the air cut plate 24 is increased by putting the aperture in the air cut plate 24. Further, the lower portion of the air cut plate 24 is configured to match the shape of the clutch housing 22, and an inverted U-shaped notch is provided at the lower left and right center and bulges rearward so that it can be fitted into the clutch housing 22. Therefore, the shielding property is secured.
[0017]
The front tank 29 is provided with a refueling port 32 at the top, and the refueling port 32 is arranged at a position higher than the upper ends of the rear tank 30 and the air cut plate 24 so that fuel can be easily supplied to the fuel tank 25. The lower end of the front tank 29 is configured to be lower than the lower end of the rear tank 30, and a fuel discharge port 34 is formed at the lower end of the front tank 29 located at the front portion, so that the fuel supply pipe 40 shown in FIG. The engine 5 can be supplied with fuel. Further, a pipe 33 is communicated from the lower end of the rear tank 30 to the lower part of the front tank 29 so that the fuel tank can be circulated. In addition, the upper part of the rear tank 30 and the front tank 29 is also connected. Further, the surplus fuel of the fuel supply device of the engine 5 is returned to the fuel tank 25 through the pipe 38. In the present invention, the surplus fuel is heated by the engine and is at a high temperature. The end communicates with the fuel return section 42 at the lower part of the rear tank 30, and the high temperature surplus fuel is returned to the rear tank 30 having a larger capacity than the engine, and after being cooled, is supplied again from the front tank 29. To be. Therefore, low temperature fuel can be supplied to the engine, and a stable engine output can be obtained.
[0018]
The lower portion of the air cut plate 24 is fixed to the engine frame 8 via a vibration isolating member 35 so that the vibration of the engine 5 is not directly transmitted to the fuel tank 25. Therefore, this vibration is prevented from being transmitted from the fuel tank 25 around the driver's seat.
[0019]
A pedal bracket 31 is fixed to the lower rear surface of the air cut plate 24. The pedal bracket 31 is configured by bending the plate into a substantially inverted U shape when viewed from the rear, and has a shape that covers a bulging portion that matches the shape of the clutch housing formed at the lower portion of the air cut plate 24. A “Π” -shaped mounting portion 31b is fixed on the upper surface, and the rear tank 30 is mounted and supported on the mounting portion 31b, and the fixing portion 31a is configured at the rear of the mounting portion 31b. . A pedal support shaft 36a of the clutch pedal 36 and a pedal support shaft 41a of the brake pedals 41L and 41R are provided on the side surface of the mounting portion 31b so as to protrude outward. The lower portions on both sides of the pedal bracket 31 can be fixed to the step. Thus, the fuel tank 25 is supported even for the step.
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
[0020]
That is, as shown in claim 1, in the fuel tank of the tractor divided into two fuel tanks, the fuel tank is divided into a front tank and a rear tank, the front tank is arranged in the bonnet, and the rear tank is arranged in the dashboard. The capacity of the fuel tank can be increased, and the vacant space in the hood and dashboard can be used effectively.
In addition, since a plate is interposed between the front tank and the rear tank, and the plate is also used as a shielding member for the engine room and the operating section, the types of parts can be reduced and management can be facilitated. Can be configured.
In addition, since the pedal bracket is fixed to the plate and the mounting portion of the rear tank is formed on the upper portion of the pedal bracket, a large part for arranging the fuel tank can be omitted, and the kind of parts can be reduced and managed. It can be simplified and can be configured at low cost.
[0021]
Since the capacity of the front tank is made smaller than the capacity of the rear tank, the rear tank accumulates a large volume of fuel in a dashboard far away from the engine to suppress a rise in the temperature of the fuel. Can be arranged compactly in a space-saving space inside the bonnet, and can be arranged at a position close to the fuel supply unit, and the piping can be shortened.
[0022]
Since the lower end of the front tank is located below the lower end of the rear tank, the fuel easily flows into the front tank 29 in the fuel tank 25, and the fuel remains in the rear tank 30. This makes it easier to supply fuel to the engine.
[0023]
According to the fourth aspect of the present invention, since the front tank is disposed so as to be biased toward the intake side of the engine, it is possible to prevent the fuel supplied to the engine from becoming hot due to the exhaust pipe or the like, and to shorten the piping.
[0024]
According to the fifth aspect of the present invention, a pipe for supplying the return fuel from the engine fuel supply device is connected to the rear tank, so that the high-temperature fuel is cooled after the elapse of time after returning to the rear tank far from the engine. Since the used fuel is supplied again to the front tank, low temperature fuel can be supplied to the engine, and a stable engine output can be obtained.
[0025]
According to the sixth aspect of the present invention, since the convex throttle adapted to the shape of the rear tank is formed on the plate, a large part for attaching the fuel tank can be omitted, and the kind of parts can be reduced and management can be facilitated. Can be easily assembled and can be constructed at low cost.
[Brief description of the drawings]
FIG. 1 is an overall side view of a tractor according to the present invention.
FIG. 2 is a partial side view of a tractor showing a fuel tank arrangement structure according to the present invention.
FIG. 3 is a plan view of a fuel tank.
FIG. 4 is a side view of the same.
FIG. 5 is also a front view.
FIG. 6 is also a rear view.
FIG. 7 is a perspective view of the same.
FIG. 8 is a perspective view of the same.
[Explanation of symbols]
24 Air cut plate 25 Fuel tank 29 Front tank 30 Rear tank 31 Pedal bracket 32 Refueling port 34 Fuel discharge port 35 Anti-vibration member 36 Pedal 37 Band 39 Restriction part

Claims (6)

In a tractor fuel tank that is divided into two fuel tanks, the fuel tank is divided into a front tank and a rear tank, the front tank is placed in the hood, the rear tank is placed in the dashboard , and the plate is placed between the front tank and the rear tank. The tractor is characterized in that the plate is used as a shielding member for the engine room and the operating portion, a pedal bracket is fixed to the plate, and a rear tank mounting portion is formed on the pedal bracket. Fuel tank.   2. The tractor fuel tank according to claim 1, wherein a capacity of the front tank is smaller than a capacity of the rear tank.   2. The fuel tank for a tractor according to claim 1, wherein the lower end of the front tank is positioned below the lower end of the rear tank.   2. The fuel tank for a tractor according to claim 1, wherein the front tank is disposed so as to be biased toward an intake side of the engine.   2. The fuel tank for a tractor according to claim 1, wherein a piping for feeding return fuel from an engine fuel supply device is connected to the rear tank. 2. A fuel tank for a tractor according to claim 1, wherein a convex throttle adapted to the shape of the rear tank is formed on the plate .

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