JP2554810Y2 - Fuel supply system for work vehicles on slopes - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a technique for permitting fuel which has been filled to a level not to leak out of a fuel tank refueling lid to the outside even when farming is performed on a slope or uneven land. The present invention relates to a fuel supply device for a work vehicle for sloped land, which is capable of smoothly supplying a required amount of fuel to a diesel engine to achieve efficient agricultural work for a long period of time.

[0002]

2. Description of the Related Art Conventionally, fuel sent from a fuel tank 3 installed on a chassis 2 of a work vehicle 1 for a slope to a fuel injection pump 6 by a fuel pump 5 through a fuel filter 4 is passed through a fuel injection pipe 7 to a nozzle 8. The fuel supply device in the working vehicle for sloping land, which injects the fuel into the combustion chamber of the diesel engine 9 and lubricates the nozzle 8 so that the leaked fuel is automatically returned to the fuel tank 3 through the overflow pipe 10, Prior to the present application, it is known as shown in FIG.

[0003]

By the way, a fuel filler lid 12 provided with a vent hole 13 is provided in a fuel filler port 11 provided on an upper surface of a fuel tank installed in a conventional work vehicle of this kind on a sloped land.
To prevent the inside of the fuel tank from becoming airtight, and even if the amount of fuel is reduced by the operation of the diesel engine, the outside air enters the fuel tank through the vent hole to smoothly supply the fuel. It is configured to be. However, in the case where the ventilation hole is provided directly in the fuel filler lid, a part of the fuel in the fuel tank leaks from the ventilation hole during traveling on a sloped surface or a condition with severe unevenness, so that many accidents occur. In general, the fuel is regulated and supplied to about 70% or less, so that there has been a problem that work for a long time cannot be achieved.

[0004] The present invention has been made in view of such problems of the prior art, and the purpose thereof is to make it possible to drive a work vehicle even on a sloped ground or in a condition with severe unevenness. Prevents the fuel in the fuel tank from leaking out of the fuel filler lid and prevents the outside air from entering the fuel tank by the reduced amount when the fuel is reduced by the operation of the diesel engine. Either allow the necessary amount of fuel to be supplied to the diesel engine smoothly, or allow the fuel tank to be fully filled with fuel to achieve efficient operation over a long period of time. It is an object of the present invention to provide a fuel supply device for a work vehicle on a slope where the trachea is protected from the outside.

[0005]

In order to achieve the above object, a fuel supply device for a working vehicle for sloped land according to the present invention is configured to inject fuel through a fuel filter from a fuel tank installed on a chassis of the working vehicle for sloped land. After pumping the fuel sent to the nozzle through the fuel injection pipe to the nozzle, the fuel is injected into the combustion chamber of the diesel engine, and the nozzle is lubricated. The leaked fuel is automatically returned to the fuel tank through the overflow pipe. In the fuel tank, a fuel supply port of the fuel tank is covered with a fuel cover having no ventilation port, and a ventilation pipe provided upright through a three-way joint in the middle of the overflow pipe surrounds a driver's seat of the work vehicle for sloped land.
A gate-type protective frame that stands upright on the chassis
Through the hollow vertical frame that forms
Through the window opened in the hollow vertical frame
It is characterized by having been exposed to.

[0006]

[0007]

[Action] now, if you send the fuel to the fuel injection pump by as fuel pump the fuel filter from the fuel tank, which was installed on the chassis of the slopes for a work vehicle, pumped into the Roh nozzle through the fuel injection pipe by the work dynamic of the fuel injection pump after that it has been, is injected into the combustion chamber of the diesel engine to start the combustion, allowed to run the diesel engine. Then, the nozzle lubricated, leaked fuel is automatically returned to the fuel tank through the overflow pipe. By the way, during the fuel supply operation as described above, a vent pipe having a vent hole on the tip side opened downward through a three-way joint is provided upright in the middle of the overflow pipe. Is it possible to prevent the outside air from entering freely and the inside of the fuel tank becoming airtight, or even if the fuel in the fuel tank is reduced due to the use of a diesel engine, the ventilation opening downward at a position higher by the reduced amount of fuel? The outside air enters automatically from the mouth, and the fuel is smoothly supplied to the diesel engine. Therefore, the diesel engine should be able to continue running lightly and be able to run on sloping terrain or on rough terrain. Not only prevents fuel leakage from the vent, but also prevents the rain and dust from entering the vent pipe from the vent because the vent is open downward. It can be prevented before it happens.
In addition, since it is housed in the hollow vertical frame of the portal-type protective wall frame disposed on the ventilation tube chassis, it can be protected without being damaged.

[0008]

An embodiment will be described with reference to the drawings. 1 to 3, reference numeral 101 denotes a work machine 10 at the front.
2, for example, a self-run type slope for work vehicle mounted removably a mower, a chassis 103 driver's seat 104 at the front side of the work vehicle 101, the operator at the time of fall of the slope for the work vehicle 101 diesel engine 1 but portal protective frame 105 is provided for preventing that you become underlay slopes for work vehicle 101, the rear side which is mounted on the chassis 103
A fuel supply device 107 for injecting and supplying fuel to the fuel cell 06 is provided. As shown in FIG. 3, the fuel supply device 107 includes a fuel tank 108 in which a blind fuel supply lid 110 having no vent hole is removably provided in a fuel supply port 109 opened on the upper surface side, and a fuel tank 108 included in fuel. The fuel is passed through a fuel injection pipe 114 by a fuel filter 111 for removing debris and the like, a fuel pump 112 for sending the fuel to a fuel injection pump 113, and a fuel injection pump 113 operated by a fuel cam shaft. A nozzle 115 for injecting the fuel into the combustion chamber and an overflow pipe 11 for lubricating the nozzle 115 and automatically returning the leaked fuel to the fuel tank 108
6 while the diesel engine 106 is operating, the fuel filter 11
After passing through 1 and removing dust, the fuel is sent to the fuel injection pump 113 by the fuel pump 112, and then the fuel injection pump 113 is operated by the fuel cam shaft, and the fuel is pumped through the fuel injection pipe 114 to the nozzle 115, and the fuel is pumped. The fuel is injected into the combustion chamber and lubricates the nozzle 115, and the leaked fuel passes through the overflow pipe 116 to the fuel tank 10.
The fuel supply operation automatically returned to 8 is performed. In the middle of the overflow pipe 116, the three-pronged joint 11
A ventilation pipe 118 having a ventilation port 119 on the distal end side opened downward through the pipe 7 is provided so that outside air can freely enter the fuel tank 108 through the ventilation pipe 118 from the ventilation port 119. If the airtight state inside the interior 108 can be eliminated and the supply of the outside air by the amount of the consumed fuel can be performed so that the fuel can be smoothly supplied, the vent 119 is provided at a high position, Even if the car 101 runs on a slope or a place with severe unevenness
And of course it can be reliably prevented from leaking fuel from the fuel supply port 109, since the vent port 119 is opened downward, in which can prevent the entry of such as rainwater and dust as much as possible.
In addition, a part of the standing ventilation pipe 118 is appropriately bent, and the hollow joint frame 10 of the portal protection frame 105 is bent.
The ventilation pipe 118 is protected by being housed in the inside 5a. Therefore, a window 120 is opened in a part of the hollow vertical frame 105a so that a downwardly opened vent 119 is exposed to the outside.

[0009]

[Effect of the Invention] The present invention is configured as described above, and the ventilation pipe is located above the fuel tank, and
Fuel leaks from the fuel tank even when the industrial vehicle runs on slopes
Prevention and accurate supply of fuel ensure
Driving of a business vehicle can be performed efficiently. Further up
Ventilation pipes surround the driver's seat of a work vehicle for sloping terrain.
A gate-type protective frame that stands upright on the undercarriage
That is inserted into the hollow vertical frame
Bending or damage due to abrasion or collision during traveling, etc.
Protected from scratching and even over
Fuel in the flow pipe leaks into the chassis, causing equipment corruption.
Without opening, in the window opened in the hollow vertical frame
Outside air flows into the fuel tank through the vent
It is possible to prevent the airtight state from being caused.

[Brief description of the drawings]

FIG. 1 is a partially broken side view of a work vehicle for sloping land provided with the device of the present invention.

FIG. 2 is a partially cutaway rear view of the work vehicle for sloped land provided with the device of the present invention.

FIG. 3 is an enlarged front view of the fuel supply device with a part cut away.

FIG. 4 is an enlarged front view of a conventional fuel supply device with a part cut away.

[Explanation of symbols]

 101 Work Vehicle for Sloped Land 103 Undercarriage 105 Gate Type Protective Frame 105a Hollow Vertical Frame 106 Diesel Engine 107 Fuel Supply Device 108 Fuel Tank 109 Filler 110 110 Filler Cover 111 Fuel Filter 113 Fuel Injection Pump 114 Fuel Injection Pipe 115 Nozzle 116 Overflow Pipe 117 Trifurcated Fitting 118 Vent pipe 119 Vent

Claims (1)

(57) [Scope of request for utility model registration] Claims: 1. After fuel sent to a fuel injection pump from a fuel tank installed on a platform of a work vehicle for sloping land through a fuel filter and fed to a nozzle through a fuel injection pipe,
The fuel is injected into the combustion chamber of a diesel engine, the nozzle is lubricated, and the leaked fuel is automatically returned to the fuel tank through an overflow pipe. In addition to the lid, a ventilation pipe erected through a three-way joint in the middle of the overflow pipe is
A gate-type protective cover that stands on the chassis to surround the driver's seat
Through the hollow vertical frame that composes the frame
The ventilation opening provided in the hollow vertical frame
A fuel supply device for a work vehicle for sloping land, characterized in that the fuel supply device is exposed to the outside .