JP6633332B2 - Work vehicle - Google Patents

Description

  The present invention relates to a working vehicle such as a tractor.

  BACKGROUND ART A working vehicle such as a tractor is provided with a segmenter for separating water mixed in fuel and a fuel filter for filtering fuel in a fuel supply path from a fuel tank to an engine. For example, Patent Literatures 1 and 2 disclose a work vehicle equipped with two fuel filters also serving as segmenters.

JP 2013-23053 A JP 2014-233981 A

In the working vehicle of Patent Document 1, since two fuel filters are disposed in front of the radiator in the engine room, a cooling effect of fuel passing through the fuel filters can be obtained, but water accumulated in the segmenter can be confirmed. However, there is a problem that the drainage work is difficult to perform.
On the other hand, in the working traveling vehicle of Patent Document 2, since two fuel filters are arranged outside the step frame that supports the floor of the driving unit, it is necessary to check the water accumulated in the segmenter and drain the water. It is easy and it is possible to avoid direct contact with exhaust air (hot air) from the engine. However, since the fuel filter is located on the outermost side of the body, there is a possibility that the fuel filter may be damaged by contact with an obstacle.

SUMMARY OF THE INVENTION The present invention has been made to solve these problems in view of the above-mentioned circumstances, and the invention of claim 1 has a fuel supply path from a fuel tank to an engine. A working vehicle equipped with a segmenter for separating water and a fuel filter for filtering fuel, a radiator disposed in front of the engine, left and right front wheels disposed on left and right sides of the engine, and a front wheel. comprising of a step frame that supports the floor of the operating portion at the rear, and a fuel tank disposed below the step frames, the fuel filter is disposed in front of the radiator, the sedimenter, the front wheel and step frame between at least the front is covered with a cover, and arranged in a state of total sedimenter protrudes forward from the front surface of the step frame and the fuel tank A working vehicle, characterized in that it is.
The invention according to claim 2 is the work vehicle according to claim 1, wherein the cover opens the side of the segmenter while covering the front of the segmenter.

According to the first aspect of the present invention, since the segmenter is disposed between the front wheel and the step frame with at least the front covered with the cover, it is easy to check the water accumulated in the segmenter and to drain the water. Nevertheless, damage due to contact with an obstacle can be prevented, and furthermore, a cover that covers at least the front can also prevent direct contact with exhaust air from the engine. In addition, since the fuel filter is disposed in front of the radiator, a cooling effect of the fuel passing through the fuel filter can be obtained.
According to the invention of claim 2, since the cover opens the side of the segmenter while covering the front of the segmenter, it is possible to check the water accumulated in the segmenter and drain the water without removing the cover. be able to.

It is a perspective view of the tractor concerning one embodiment of the present invention. It is a right view of the tractor concerning one embodiment of the present invention. It is a principal part front view of the tractor which shows the support structure of a step frame and a fuel tank. It is the perspective view which looked at the support structure of the fuel tank from the upper side. It is the perspective view which looked at the support structure of the fuel tank from the lower side. It is a perspective view of a fuel tank bracket and a lower bracket. FIG. 3 is an explanatory diagram showing a flow of fuel. (A) is a plan view of the fuel tank, (B) is a side view of the fuel tank, and (C) is a front view of the fuel tank. It is the perspective view which looked at the attachment state of the segmenter from the upper part. It is the perspective view which looked at the attachment state of the segmenter from the lower part. It is a perspective view in an engine room which shows arrangement of a main filter.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2, reference numeral 1 denotes a tractor (working vehicle). The tractor 1 includes an engine (not shown) mounted in an engine room 2 (see FIG. 11) at the front of the body, and a body. A transmission case 3 that is arranged along the front-rear direction at the left and right central portions of the vehicle and that shifts engine power; a pair of left and right front wheels 4 and rear wheels 5 that are driven to rotate by power transmitted from the transmission case 3; 6 and the like, and is used by connecting an arbitrary working machine to the rear part or the front part of the body.

  The operation unit 6 of the present embodiment includes a cabin 7 that covers the operation space of the operator. An entrance 7a which is opened and closed by a door 8 is provided on both left and right sides of the cabin 7, and an operator gets on and off the driving unit 6 through the entrance 7a.

  As shown in FIG. 3, a step frame 9 that supports a floor (step) of the driving unit 6 is provided at a lower end portion on the front side of the driving unit 6. The step frame 9 extends to the left and right sides so as to straddle the transmission case 3 and supports the floor of the driving unit 6. Further, a step 10 for getting on and off which is used at the time of getting on and off is provided at the extending front end of the step frame 9.

  As shown in FIGS. 3 and 4, a pair of left and right mount brackets 11 that support the step frame 9 in a vibration-proof manner are provided below the step frame 9. The mount bracket 11 extends from the upper part of the transmission case 3 to the left and right sides, and the middle part of the extension of the step frame 9 is supported at the upper part on the tip side by vibration isolation. More specifically, the mount bracket 11 has a base end portion fastened to the upper side surface of the transmission case 3 and a front end portion extending to near the inside of the step 10 for getting on and off. The extension intermediate portion of the step frame 9 is supported through the vibration member 12 in a vibration-proof manner.

  As shown in FIGS. 3 to 6, a pair of left and right fuel tanks 13 are disposed below the step frame 9 and on both left and right sides of the transmission case 3. The left and right fuel tanks 13 are, for example, tanks made of an iron plate, and are communicated with each other via a communication hose 15. In the present embodiment, the fuel supply port 16 is provided in the left fuel tank 13, and the fuel supplied from the fuel tank 16 is stored in the left and right fuel tanks 13 substantially uniformly. A suction hose 17 and a return hose 18 are connected to the right fuel tank 13. Fuel in the right fuel tank 13 is supplied to the engine via the suction hose 17, while unburned return fuel is supplied to the engine. Is returned to the right fuel tank 13 via the return hose 18.

  The left and right fuel tanks 13 are attached to the body via left and right fuel tank brackets 19, respectively. The fuel tank brackets 19 are box-shaped with an open top, and the fuel tanks are provided with rubber plates 20 at the bottoms thereof. The fuel tank 13 is fixed to the fuel tank bracket 19 using the belt-shaped clamp 21 while the fuel tank 13 is placed.

  A lower bracket 22 extending in the left-right direction is fixed to a lower portion of the transmission case 3, and inner ends of left and right fuel tank brackets 19 are connected to both left and right ends. Further, the outer end side of the fuel tank bracket 19 is hung at the distal end side of the left and right mount brackets 11, and the left and right fuel tanks 13 attached to the left and right fuel tank brackets 19 have a predetermined interval. And is disposed below the mount bracket 11.

  By doing so, the fuel tank 13 can be protected by using the mount bracket 11. Further, since the fuel tank bracket 19 to which the fuel tank 13 is attached is hung on the distal end side of the mount bracket 11, even if the mount bracket 11 is deformed as the step frame 9 is deformed, it occurs. In addition, the fuel tank bracket 19 can follow the deformation of the mount bracket 11, so that the distance between the mount bracket 11 and the fuel tank 13 is maintained as much as possible, and the fuel tank 13 is brought into contact with the mount bracket 11. Damage can be prevented.

  The fuel tank bracket 19 of the present embodiment includes a cover 19a that covers the outside of the fuel tank 13. According to such a fuel tank bracket 19, even when the step 10 for getting on and off arranged on the outside of the fuel tank 13 is deformed, the step 10 for getting on and off directly contacts the fuel tank 13. And the damage of the fuel tank 13 can be prevented.

  In the present embodiment, when the cover 19 a is provided on the fuel tank bracket 19, the cover 19 a is also used as a suspension member of the fuel tank bracket 19. That is, the cover 19 a extends upward from the tip of the fuel tank bracket 19 and is fastened to the tip of the mount bracket 11.

  As shown in FIG. 7, the engine mounted on the tractor 1 of the present embodiment is a diesel engine, and a common rail system is employed to reduce the exhaust gas. The common rail system of the present embodiment includes a segmenter 23, a pre-filter 24, an electromagnetic pump 25, a main filter 26 (fuel filter), a supply pump 27, a common rail 28, and a fuel cooler 29.

  The electromagnetic pump 25 sucks the fuel in the fuel tank 13, the segmenter 23 separates water mixed in the sucked fuel, and the pre-filter 24 filters the fuel on the upstream side of the electromagnetic pump 25. Note that the segmenter 23 may be shared by a pre-filter 24 having a segmenter function.

  The main filter 26 filters the fuel downstream of the electromagnetic pump 25, and the supply pump 27 pumps the filtered fuel to a common rail 28. At that time, the surplus fuel is returned to the fuel tank 13 via the fuel cooler 29.

  The common rail 28 stores high-pressure fuel pumped from the supply pump 27. Then, the high-pressure fuel in the common rail 28 is injected into each cylinder from an injector (not shown) based on electronic control. The common rail 28 is provided with a relief valve (not shown) for maintaining the pressure, and the fuel discharged from the relief valve is returned to the fuel tank 13 via the fuel cooler 29.

  As shown in FIG. 8, the right fuel tank 13 has a suction nozzle 30 connected to the suction hose 17, a suction pipe 31 extending from the suction nozzle 30 into the tank, and a return pipe connected to the return hose 18. A nozzle 32, a return pipe 33 extending from the return nozzle 32 into the tank, and a fuel gauge 34 for detecting a fuel level in the tank are provided.

  The fuel gauge 34 has a float 35 that floats on the fuel level inside the fuel tank 13, a detector 36 fixed to the upper part of the fuel tank 13, and a base end supported by the detector 36 so as to be vertically rotatable. , And a detection arm 37 whose distal end is connected to the float 35. The float 35 moves up and down according to a change in the fuel liquid level in the tank, and the detection arm 37 rotates up and down according to the up and down movement of the float 35. Then, the detection unit 36 detects the vertical rotation angle of the detection arm 37 and outputs this as a fuel level detection signal.

  The rotation range of the detection arm 37 is defined in advance, and its lower limit position is based on the position of the float 35 when the fuel level in the tank drops to the lower limit level L (out-of-fuel warning level). Is set. In the present embodiment, a virtual line K shown in FIG. 8B is a movement locus of the float 35, and the suction pipe 31 and the return pipe 33 are arranged so as not to interfere with the movement locus.

  The suction nozzle 30 and the return nozzle 32 are provided on a side surface of the fuel tank 13. In the present embodiment, the suction nozzle 30 and the suction nozzle 30 are provided on the front side of the side of the fuel tank 13 facing the inside of the aircraft, of the side facing the inside of the aircraft, the side facing the outside of the aircraft, the side facing the front of the aircraft, and the side facing the rear of the aircraft. A return nozzle 32 is provided. According to such a nozzle arrangement, not only can the connection of the suction hose 17 and the return hose 18 to the fuel tank 13 be improved, but also the nozzle Can be brought closer to the engine room 2 so that the lengths of the suction hose 17 and the return hose 18 can be reduced.

  The suction pipe 31 extends from the suction nozzle 30 into the fuel tank 13 and sucks the fuel in the fuel tank 13. The return pipe 33 extends from the return nozzle 32 into the fuel tank 13 and returns the fuel to the fuel tank 13. In returning to the inside, the distal ends of both pipes 31 and 33 are arranged near the center in the fuel tank 13 and below the lower limit liquid level of the fuel. In this manner, not only can the fuel be sucked in the vicinity of the center in the fuel tank 13 where the change in the liquid level due to the body swing is small, but also the returned fuel can be returned below the liquid level, and air is mixed by the returned fuel. Can also be prevented.

  The suction pipe 31 and the return pipe 33 are arranged in parallel in the fuel tank 13 at predetermined intervals in the vertical direction when they are arranged in the fuel tank 13 while avoiding interference with the float 35 and the detection arm 37 of the fuel gauge 34. . More specifically, the suction pipe 31 and the return pipe 33 are vertically arranged in parallel by utilizing an empty space in the fuel tank 13 located on the front side of the fuselage with respect to the movement locus K of the float 35 shown in FIG. It is arranged compactly.

  The distal end of the suction pipe 31, which is arranged below the return pipe 33 and extends outward from the suction nozzle 30 from the suction nozzle 30, is bent obliquely downward toward the rear side of the fuselage to be below the liquid level lower limit level L. Then, the distal end side of the return pipe 33 extending from the return nozzle 32 to the outside of the body is bent obliquely downward while facing the outside of the body and reaches below the liquid level lower limit level L. In this case, since the distal ends of the two pipes 31 and 33 face different directions, it is possible to avoid that the high-temperature return fuel returned into the fuel tank 13 by the return pipe 33 is immediately sucked into the suction pipe 31. The temperature rise of the suction fuel supplied to the engine can be suppressed. In addition, the tip of the suction pipe 31 may be directed to the front of the machine or the inside of the machine.

  As shown in FIG. 9 and FIG. 10, the segmenter 23 performs an operation for discharging the water stored in the water storage unit 23 a and a water storage unit 23 a that stores the water separated from the fuel so that the water can be viewed from the outside. A water draining operation unit 23b and an air draining operation unit 23c that performs an operation for draining air from the segmenter 23 are provided.

The segmenter 23 is mounted via a bracket 38 in front of the right fuel tank 13 and in front of the step frame 9. That is, the segmenter 23 is located between the front wheel 4 and the step frame 9 as is apparent from, for example, FIGS. 1, 2, 4, and 9, and the entire segmenter 23 is located on the front surface of the step frame 9 and the fuel tank 13. It is arranged so as to protrude forward. Since the front wheel 4 is located in front of this mounting position, it is a position where the possibility of contact with an obstacle is low, and damage to the segmenter 23 due to contact with the obstacle can be prevented. Further, in this mounting position, it is easier to check the water accumulated in the segmenter 23 and to drain the water than in the engine room 2.

  Further, in the present embodiment, a cover 39 that opens the side of the segmenter 23 while covering the front of the segmenter 23 is attached to the bracket 38 of the segmenter 23. To be more specific, the cover 39 of the present embodiment opens the outside and below the body of the segmenter 23 while covering the front, upper side and inside of the body of the segmenter 23. According to such a cover 39, it is possible to prevent the exhaust air (hot air) of the engine from directly hitting the segmenter 23 without obstructing the water accumulated in the segmenter 23 and hindering the draining operation, thereby increasing the temperature of the fuel. Can be suppressed.

  As shown in FIG. 11, the main filter 26 is disposed in the engine room 2 in front of the radiator 40. It is possible to efficiently cool the fuel immediately before sending it to the supply pump 27, and it is possible to suppress a decrease in engine performance due to an increase in the temperature of the fuel.

  According to the present embodiment configured as described above, the tractor 1 including the segmenter 23 for separating water mixed in the fuel and the main filter 26 for filtering the fuel is provided in the fuel supply path from the fuel tank 13 to the engine. A radiator 40 disposed in front of the engine, left and right front wheels 4 disposed on left and right sides of the engine, and a step frame 9 for supporting the floor of the driving unit 6 behind the front wheels 4; Since the segmenter 23 is disposed between the front wheel 4 and the step frame 9 at least in a state where the front is covered with the cover 39, it is easy to check the water accumulated in the segmenter 23 and to perform the draining operation. Breakage due to contact with an object can be prevented, and furthermore, the cover 39 that covers at least the front can also prevent direct exhaust from the engine. In addition, since the main filter 26 is disposed in front of the radiator 40, the effect of cooling the fuel passing through the main filter 26 can be obtained.

  Further, since the cover 39 covers the front of the segmenter 23 and opens the outside of the segmenter 23, it is possible to check the water accumulated in the segmenter 23 and drain the water without removing the cover 39.

DESCRIPTION OF SYMBOLS 1 Tractor 2 Engine room 4 Front wheel 6 Operation part 9 Step frame 13 Fuel tank 23 Segmenter 23a Water storage part 23b Water removal operation part 23c Air release operation part 26 Main filter 39 Cover 40 Radiator

Claims (2)

A working vehicle equipped with a fuel supply path from a fuel tank to an engine, a segmenter for separating water mixed in the fuel, and a fuel filter for filtering the fuel,
A radiator arranged in front of the engine;
Left and right front wheels located on the left and right sides of the engine,
A step frame that supports the floor of the driving unit behind the front wheels ,
And a fuel tank disposed below the step frame ,
The fuel filter is disposed in front of a radiator,
The sedimenter is between the front wheels and the step frame, at least the front is covered with a cover, and wherein the entire sedimenter are arranged in a state projecting forward from the front surface of the step frame and the fuel tank Work vehicle.   The working vehicle according to claim 1, wherein the cover opens a side of the segmenter while covering a front of the segmenter.

Images