JP7350711B2 - work vehicle - Google Patents

Description

The present invention relates to a work vehicle such as a combine harvester.

Work vehicles such as combines are equipped with a fuel tank that stores fuel such as diesel oil to be supplied to the engine.

A breather hose is connected to the fuel tank to enable breathing due to the pressure difference between the inside and outside of the fuel tank. The breather hose has its proximal end connected to the fuel tank, and its tip open to the atmosphere outside the fuel tank. Therefore, when the pressure inside the fuel tank increases, such as when fuel is injected into the fuel tank, air inside the fuel tank escapes to the outside through the breather hose. Further, when the fuel in the fuel tank is consumed by driving the engine and the pressure in the fuel tank decreases, outside air is sucked into the fuel tank through the breather hose.

Japanese Patent Application Publication No. 11-127658

However, work vehicles such as combine harvesters generate a lot of dust (for example, straw waste), so dust is easily sucked into the breather hose along with outside air from its open end, which can cause the breather hose to become clogged with dust. There is.

An object of the present invention is to provide a work vehicle that can suppress clogging of a breather hose with dust.

In order to achieve the above object, a work vehicle according to the present invention includes a body, a fuel tank supported by the body and storing fuel therein, and a base end connected to the fuel tank and communicating with the inside of the fuel tank. The fuel tank also includes a breather pipe whose tip is opened outside the fuel tank, and the tip of the breather tube is directed downward.

According to this configuration, breathing is possible through the breather pipe connected to the fuel tank due to the pressure difference between the inside and outside of the fuel tank. Since the tip of the breather tube is directed downward, even in an environment where a lot of dust such as straw waste is generated, it is possible to suppress dust from being sucked into the breather tube along with outside air from the tip. As a result, clogging of the breather pipe due to dust can be suppressed.

The distal end of the breather tube may be surrounded by a surrounding member. Thereby, it is possible to further suppress dust from being sucked into the breather pipe from its tip.

The surrounding member is a pipe frame that constitutes a part of the fuselage, and the breather pipe is inserted into the pipe frame through a through hole formed on a side surface of the pipe frame, and extends downward from the through hole within the pipe frame. Good too. Since the tip of the breather tube is surrounded by the pipe frame, it is possible to further suppress dust from being sucked into the breather tube from the tip.

The tip of the breather tube may be a shape-retaining cylindrical body. Thereby, it is possible to suppress the direction of the tip of the breather tube from changing from the downward direction, and it is possible to further suppress dust from being sucked into the breather tube from the tip.

It is preferable that the work vehicle includes a pipe frame that constitutes a part of the body, and that the cylindrical body is provided across the inside and outside of the pipe frame through a through hole formed in the side surface of the pipe frame. In this configuration, the tip of the breather tube is surrounded by the pipe frame, so that dust can be further suppressed from being sucked into the breather tube from the tip.

The cylindrical body may have a shape in which its center line intersects with the center line of the pipe frame and in a direction along the center line of the pipe frame. When the cylindrical body has such a shape, it is possible to prevent the cylindrical body from coming out of the through hole of the pipe frame.

The cylindrical body may have a bent portion that is bent from a direction intersecting the centerline of the pipe frame to a direction along the centerline of the pipe frame.

An electrical component may be supported by the pipe frame, and the through hole may be formed at a position spaced apart from the electrical component by a predetermined distance. By separating the through hole from the electrical component, it is possible to secure the required distance between the electrical component and the breather pipe.

When the tip of the breather tube is a shape-retaining cylindrical body, the cylindrical body is preferably made of an insulating material. Thereby, the insulation distance between the electrical component and the breather tube can be increased.

The electrical equipment may be provided with exposed terminals to which electric wires are connected.

Since the required distance is secured between the electrical component and the breather tube, it is possible to eliminate the need for a member to protect the terminals.

According to the present invention, it is possible to prevent dust from being sucked into the breather hose along with outside air from its tip, and furthermore, it is possible to prevent the breather hose from being clogged with dust.

FIG. 1 is a right side view of a combine harvester according to an embodiment of the present invention. It is a top view of a combine. It is a perspective view showing composition of a rear end part of a combine, and a threshing device and a grain tank are omitted. FIG. 3 is a front view of the vicinity of the tip of the breather pipe. FIG. 5 is a view of the vicinity of the tip of the breather pipe viewed from the front, and shows the structure shown in FIG. 4 with the pipe of the pipe frame omitted.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

<Overall configuration of combine>
FIG. 1 is a right side view of a combine harvester 1 according to an embodiment of the present invention. FIG. 2 is a plan view of the combine 1.

The combine 1 is an example of a harvester that reaps grain culms and threshes grain from the grain culms while traveling in a field.

As shown in FIG. 1, the combine 1 includes a main frame 2 that is a structure made of a combination of a plurality of steel materials. Further, the combine 1 employs a pair of left and right crawlers 3 as a traveling device capable of traveling over uneven terrain such as a farm field. The main frame 2 is supported by a pair of left and right crawlers 3.

The crawler 3 is equipped with a drive sprocket 4 as a drive wheel. An axle 5 is connected to the drive sprocket 4 so as not to be relatively rotatable. Engine power is transmitted to the axle 5 via a power transmission mechanism. The engine is a diesel engine with an exhaust turbine supercharger. The power transmission mechanism includes, for example, an HST (Hydro Static Transmission) or a gear mechanism. The engine and power transmission mechanism are supported by the main frame 2. The power transmission mechanism is disposed above the center of the front end of the main frame 2 in the left-right direction (vehicle width direction), and the engine is disposed protruding to the right side of the power transmission mechanism at the rear side of the power transmission mechanism. ing.

A reaping device 11 is provided in front of the main frame 2 and at the forefront of the combine 1. The reaping device 11 reaps the grain culms planted in the field as the combine harvester 1 moves forward.

The main frame 2 supports a threshing device 12, a cabin 13, and a grain tank 14.

The threshing device 12 is arranged on the left part of the main frame 2, as shown in FIG. The threshing device 12 conveys the stock side of the grain culm cut by the reaping device 11 rearward by a threshing feed chain, and supplies the tip side of the grain culm to a handling room for threshing.

The cabin 13 is arranged on the front end of the main frame 2 toward the right side. The cabin 13 provides a space in which the driver rides, and within this space, for example, a driver's seat where the driver is seated, and operating members such as operating levers and operating pedals are arranged. As shown in FIG. 1, the bottom plate portion 15 that provides the floor of the cabin 13 is spaced upward from the right front end of the main frame 2 on the right side of the power transmission mechanism. A portion of the cabin 13 on the left side of the bottom plate portion 15 protrudes above the power transmission mechanism, and a rear portion thereof protrudes above the engine.

A doorway 16 is formed on the right side of the cabin 13, and a door 17 for opening and closing the doorway 16 is provided. The operator of the combine 1 (the worker who performs the reaping work) can open the door 17 and get on and off the cabin 13 through the entrance 16.

The grain tank 14 is arranged behind the cabin 13 with a space therebetween. The grain tank 14 provides a space in which paddy (grain) can be stored. The paddy removed from the grain culm by the threshing device 12 is transported to the grain tank 14 and stored therein. An unloader 18 is connected to the grain tank 14, and the paddy stored in the grain tank 14 can be carried out by the unloader 18 and discharged outside the machine.

<Configuration of the rear end of the combine>
FIG. 3 is a perspective view showing the configuration of the rear end of the combine harvester 1, with the threshing device 12 and grain tank 14 omitted.

A fuel tank 21 for storing fuel (light oil) to be supplied to the engine is arranged on the rear end of the main frame 2 toward the left side.

Furthermore, a pipe frame 22 that supports the threshing device 12 (see FIG. 2) is provided on the rear end of the main frame 2. The pipe frame 22 is a skeleton made by connecting steel pipe materials 23, 24 and the like. The pipe material 23 is provided at a position spaced to the right with respect to the front end of the fuel tank 21, has a lower end fixed to the main frame 2, and extends upward from the main frame 2. The right end of the pipe material 24 is fixed to the pipe material 23 and extends to the left, and the left end is fixed to the left side plate 25 of the threshing device 12.

A fuel supply pipe 26 is connected to the left side of the fuel tank 21. The fuel supply pipe 26 extends from the fuel tank 21 to the left side, and extends backward and diagonally upward. The tip of the oil supply pipe 26 is open as a fuel supply port, and a fuel supply cap 27 is removably attached to the fuel supply port. Fuel can be injected into the fuel tank 21 through a fuel filler pipe 26 from a fuel filler port.

A breather connection port is formed on the upper surface of the fuel tank 21, and a pipe body 29 of a breather pipe 28 is connected to the breather connection port. The tube body 29 is a flexible hose (tube), and is pulled out to the right side of the fuel tank 21 and routed to the front side of the rear end 32 of the right side plate 31 of the threshing device 12.

<Breather pipe>
4 and 5 are views of the vicinity of the distal end portion 34 of the breather pipe 28 as viewed from the front. In FIG. 5, the pipe material 23 of the pipe frame 22 is omitted from the configuration shown in FIG.

The pipe main body 29 of the breather pipe 28 extends upward from the front side of the rear end portion 32 of the right side plate 31, curves to the right, and extends to the right toward the pipe material 23 of the pipe frame 22. The curved portion of the tube body 29 is covered with a corrugated tube 33 for protection.

The breather tube 28 includes an L-shaped tip 34 , and the tube body 29 is connected to the tip 34 . The tip portion 34 is inserted into a through hole 35 formed on the left side surface of the pipe material 23, and is provided so as to straddle the inside and outside of the pipe material 23.

Specifically, the tip portion 34 is formed into an L-shaped cylindrical body using an insulating material, and has insulating properties as well as shape retention to maintain its L-shaped shape. have. As shown in FIG. 5, the tip portion 34 includes a horizontal portion 36 whose center line extends in a direction (left and right) perpendicular to the center line of the pipe material 23, and a horizontal portion 36 whose center line extends in a direction (left and right) perpendicular to the center line of the pipe material 23; It integrally has a vertical portion 37 extending in a direction (direction) and a bent portion 38 connecting the horizontal portion 36 and the vertical portion 37. The horizontal portion 36 is inserted into the through hole 35 on the left side of the pipe material 23, and the vertical portion 37 and the bent portion 38 are arranged within the pipe material 23. The bent portion 38 is bent downward at a position facing the through hole 35 in the left-right direction, and the vertical portion 37 extends downward from the bent portion 38 . The tube body 29 is connected to the lateral portion 36, and the tube body 29 and the tip portion 34 communicate with each other internally.

Further, the lateral portion 36 of the tip portion 34 is fixed by a fixture 39 to a member 41 fixedly disposed between the pipe material 23 and the right side plate 31.

When the pressure inside the fuel tank 21 increases, such as when fuel is injected into the fuel tank 21, air inside the fuel tank 21 escapes to the outside through the breather pipe 28. Further, when the fuel in the fuel tank 21 is consumed by driving the engine and the pressure in the fuel tank 21 decreases, outside air is sucked into the fuel tank through the breather pipe 28.

Further, a bracket 42 is attached to the pipe material 23 of the pipe frame 22 at a position spaced apart from the through hole 35 by a predetermined distance. The bracket 42 supports a back buzzer 43 that emits a warning sound when the combine 1 moves backward. The back buzzer 43 is provided with an exposed terminal 44 to which an electric wire is connected.

<Effect>
As described above, the breather connection port is formed on the upper surface of the fuel tank 21, and the breather pipe 28 is connected to the breather connection port. This allows breathing through the breather pipe 28 due to the differential pressure between the inside and outside of the fuel tank 21 . The tip of the breather tube 28 is directed downward. Therefore, even in an environment where a lot of dust such as straw waste is generated, it is possible to suppress dust from being sucked into the breather pipe 28 from its tip along with the outside air. As a result, clogging of the breather pipe 28 due to dust can be suppressed.

The tip of the breather pipe 28 is surrounded by the pipe material 23 of the pipe frame 22. That is, the breather pipe 28 is inserted into the pipe material 23 through a through hole 35 formed on the side surface of the pipe material 23, and extends downward from the through hole 35 inside the pipe material 23. Since the tip of the breather tube 28 is surrounded by the pipe material 23, it is possible to further suppress dust from being sucked into the breather tube 28 from the tip.

The distal end portion 34 of the breather pipe 28 is formed into a shape-retaining cylindrical body. Thereby, the direction of the tip of the breather tube 28 can be suppressed from changing from the downward direction, and dust can be further suppressed from being sucked into the breather tube 28 from the tip.

Moreover, the tip portion 34 has a shape in which its center line is perpendicular to the center line of the pipe material 23 and in a direction along the center line of the pipe material 23, in other words, the center line is perpendicular to the center line of the pipe material 23. The pipe material 23 is formed in a shape having a bent portion 38 that is bent from the direction along the center line of the pipe material 23. This shape can prevent the distal end portion 34 from coming out of the through hole 35 of the pipe material 23.

A back buzzer 43, which is an example of an electrical component, is supported on the pipe material 23 (pipe frame 22), and the through hole 35 is formed at a position spaced apart from the back buzzer 43 by a predetermined distance. By locating the through hole 35 away from the back buzzer 43, the required distance between the back buzzer 43 and the breather pipe 28 can be secured.

Further, it is preferable that the tip portion 34 of the breather tube 28 is made of an insulating material. Thereby, the insulation distance between the back buzzer 43 and the breather pipe 28 can be increased.

Since the distance required for insulation is secured between the back buzzer 43 and the breather pipe 28, a member for protecting the terminal 44 of the back buzzer 43 can be made unnecessary.

<Modified example>
Although the embodiments of the present invention have been described above, the present invention can also be implemented in other forms.

For example, in the embodiment described above, the back buzzer 43 is placed at a predetermined distance from the through hole 35 of the pipe material 23, but the back buzzer 43 may be Electrical components other than 43 may be placed at a predetermined distance from the through hole 35.

As an example of a working vehicle, a combine harvester 1 equipped with a reaping device 11 and a threshing device 12 as working devices was taken up, but the present invention also includes a harvesting and transporting device for harvesting and transporting vegetables such as carrots, radish, edamame, and cabbage. Various types of machines are used, such as harvesters equipped with a working device, rice transplanters equipped with a seedling planting device as a working device, direct sowing machines equipped with a sowing device as a working device, tractors equipped with a plow as a working device, construction work vehicles equipped with a bucket as a working device, etc. Can be applied to work vehicles.

In addition, various design changes can be made to the above-described configuration within the scope of the claims.

1: Combine harvester (work vehicle)
2: Main frame (aircraft)
21: Fuel tank 22: Pipe frame 23: Pipe material (pipe frame)
28: Breather pipe 34: Tip 35: Through hole 38: Bent part 43: Back buzzer (electrical component)
44: Terminal

Claims (7)

The aircraft and
a fuel tank supported by the aircraft body and storing fuel therein;
a breather pipe whose base end is connected to the fuel tank, communicates with the inside of the fuel tank, and whose tip is open outside the fuel tank;
A pipe frame forming part of the aircraft body ,
the tip of the breather tube is directed downward ;
The tip of the breather pipe is a cylindrical body that retains its shape,
In the work vehicle , the cylindrical body is provided across the inside and outside of the pipe frame through a through hole formed in a side surface of the pipe frame . The work vehicle according to claim 1, further comprising a surrounding member surrounding the tip of the breather pipe. The work vehicle according to claim 1 or 2 , wherein the cylindrical body has a shape in which its center line intersects with the center line of the pipe frame and in a direction along the center line of the pipe frame. The work vehicle according to claim 3 , wherein the cylindrical body has a bent portion. The surrounding member is a pipe frame that constitutes a part of the aircraft body,
The work vehicle according to claim 2, wherein the breather pipe is inserted into the pipe frame through a through hole formed in a side surface of the pipe frame, and extends downward from the through hole inside the pipe frame. Electrical equipment is supported on the pipe frame,
The work vehicle according to any one of claims 1 to 5 , wherein the through hole is formed at a position spaced apart from the electrical component by a predetermined distance. 7. The work vehicle according to claim 6 , wherein the electrical component is provided with exposed terminals to which electric wires are connected.

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