Work vehicle

Abstract

To provide a work vehicle having satisfactory rear visibility for an operator seated in a driver's seat and having satisfactory workability.SOLUTION: A driver's seat 14S has a headrest P3. A radiator 2 cools a cooling medium for cooling an engine 5. An engine hood 13a covers a top of the radiator 2. A sealed tank 1 is arranged so as to protrude upward from an upper face of the engine hood 13a and stores the cooling medium outside the radiator 2. The sealed tank 1 is arranged so as to be superposed with the headrest P3 of the driver's seat 14S in a front view.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to work vehicles. [Background technology]

[0002] The engine of a work vehicle is cooled by a cooling medium such as cooling water. The cooling medium is cooled in a radiator. A reserve tank is connected to the radiator. The reserve tank stores the cooling medium to be replenished to the radiator.

[0003] A configuration using a sealed tank as a reserve tank is described in JP 2016-89422 A (Patent Document 1). The sealed tank described in Patent Document 1 is placed at the highest position in the coolant circuit so that air in the coolant circuit flows into the tank. For this reason, the sealed tank protrudes above the upper surface of the engine cover that covers the engine, radiator, and the like. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2016-89422 A Summary of the Invention [Problem to be solved by the invention]

[0005] The sealed tank protrudes upward from the top surface of the engine cover, and the sealed tank enters the rear view of the operator seated in the driver's seat. This may result in poor rear visibility for the operator and affect workability.

[0006] An object of the present disclosure is to provide a work vehicle that provides good rear visibility for an operator seated in the driver's seat and good workability. [Means for solving the problem]

[0007] The work vehicle of the present disclosure includes a driver's seat, an engine, a radiator, an engine hood, and a tank. The driver's seat has a headrest. The radiator cools a cooling medium for the engine. The engine hood covers an upper part of the radiator. The tank stores the cooling medium to be replenished to the radiator, and protrudes upward from an upper surface of the engine hood. The tank is positioned so as to overlap the headrest of the driver's seat in a front view. Effect of the Invention

[0008] According to the present disclosure, a work vehicle can be realized that provides an operator seated in the driver's seat with good rear visibility and good workability. [Brief description of the drawings]

[0009] [Figure 1] 1 is a side view showing a configuration of a work vehicle in one embodiment of the present disclosure. [Diagram 2] 1 is a circuit diagram showing a circulation circuit of an engine cooling medium as an engine cooling system. [Diagram 3] FIG. 4 is a diagram showing the positional relationship between the sealed tank and the radiator as viewed from the rear. [Figure 4] FIG. 2 is a top view of the work vehicle showing the arrangement of the sealed tank when viewed from above. [Diagram 5] FIG. 4 is a diagram showing the positional relationship between the sealed tank and a headrest of the driver's seat as viewed from the front. [Figure 6] FIG. 2 is a diagram showing the rear view of an operator seated in a driver's seat when looking back. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

[0011] In the specification and drawings, the same or corresponding components are denoted by the same reference numerals, and redundant explanations are not repeated. In addition, in the drawings, configurations may be omitted or simplified for the convenience of explanation.

[0012] In the following description, the terms "up," "down," "front," "rear," "left," and "right" refer to directions based on an operator seated in the operator's seat 14S in the operator's cab 14 shown in FIG.

[0013] Therefore, in the following description, the fore-aft direction X is the direction in which the boom 16 extends between the base end and the tip end in a top view. The left-right direction Y (FIG. 3) is the direction perpendicular to the fore-aft direction X in a top view. The up-down direction Z is the direction perpendicular to a plane including the fore-aft direction X and the left-right direction Y which are perpendicular to each other.

[0014] The direction from the base end of the boom 16 to the tip end is the front, and the direction from the tip end of the boom 16 to the base end is the rear. When looking forward from the rear, the right side and the left side are the right and left, respectively. In the up-down direction, the side with the ground is the bottom, and the side with the sky is the top. A top view refers to a view from above looking down at the work vehicle 10. A front view refers to a view from the front to the rear of the rotating body 13. A rear view refers to a view from the rear to the front of the rotating body 13.

[0015] <Configuration of work vehicle 10>

[0016] Fig. 1 is a side view showing a schematic configuration of a work vehicle in one embodiment of the present disclosure. As shown in Fig. 1, the work vehicle 10 of this embodiment is, for example, a hydraulic excavator, for example, a small hydraulic excavator. The work vehicle 10 of this embodiment may be, for example, a small turning radius type or a very small turning radius type hydraulic excavator. However, the work vehicle 10 is not limited to a hydraulic excavator, and may be any work vehicle 10 having an engine and a cooling system for cooling the engine.

[0017] A hydraulic excavator 10 as an example of a work vehicle 10 has a main body 11 and a hydraulically operated work machine 12. The main body 11 has a rotating body 13 and a traveling body 15.

[0018] The traveling body 15 has a pair of left and right crawlers 15Cr and a traveling motor 15M. The hydraulic excavator 10 can travel by rotation of the crawlers 15Cr. The traveling motor 15M is provided as a drive source for the traveling body 15.

[0019] The rotating body 13 is disposed on the running body 15 and is supported by the running body 15. The rotating body 13 can be rotated relative to the running body 15 about a rotation axis RX by a rotation motor (not shown). The rotation axis RX is an imaginary straight line that serves as the rotation center of the rotating body 13.

[0020] The rotating body 13 has a driver's cab 14. A driver's seat 14S where an operator sits is provided in the driver's cab 14. The operator sits in the driver's seat 14S and can operate the work equipment 12, rotate the rotating body 13 relative to the traveling body 15, and travel the hydraulic excavator 10 using the traveling body 15.

[0021] The work machine 12 is supported by the rotating body 13. The work machine 12 has a boom 16, an arm 17, and a bucket 18. The work machine 12 further has a boom cylinder 19a, an arm cylinder 19b, and a bucket cylinder 19c.

[0022] The boom 16 is rotatably connected to the main body 11. Specifically, the base end of the boom 16 is rotatably connected to the rotating body 13 with a boom foot pin BF as a fulcrum. The base end of the boom 16 is disposed in the left-right direction of the operator's cab 14. The arm 17 is rotatably connected to the boom 16. Specifically, the base end of the arm 17 is rotatably connected to the tip of the boom 16 with a boom top pin BT as a fulcrum. The bucket 18 is rotatably connected to the arm 17. Specifically, the base end of the bucket 18 is rotatably connected to the tip of the arm 17 with an arm top pin AT as a fulcrum.

[0023] Although the configuration in which the driver's seat 14S is disposed inside the driver's cab 14 has been described above, the driver's cab 14 may be omitted and the driver's seat 14S may be exposed to the outside.

[0024] The rotating body 13 has a counterweight CW and an exterior panel 13P. The counterweight CW is disposed at the rear end of the rotating body 13. The counterweight CW is provided to improve the stability of the main body 11 when the work vehicle 10 is working by balancing the uneven weight caused by the work equipment 12. The exterior panel 13P, together with the counterweight CW, surrounds the internal space of the rotating body 13.

[0025] The rotating body 13 further has an engine 5 as a drive source, and a cooling system for the engine 5. The cooling system for the engine 5 has a sealed tank 1 and a radiator 2. The engine 5 and the radiator 2 are disposed in the internal space of the rotating body 13. The engine 5 and the radiator 2 are surrounded by a counterweight CW and an exterior panel 13P.

[0026] <Engine cooling system>

[0027] Next, the engine cooling system used in the work vehicle of this embodiment will be described with reference to FIG.

[0028] 2 is a circuit diagram showing a circulation circuit of an engine cooling medium as an engine cooling system. As shown in FIG. 2, the engine cooling system has a sealed tank 1 and a radiator 2.

[0029] A flow path (for example, a water jacket) through which a cooling medium flows for cooling the engine 5 is provided inside the engine 5. The radiator 2 is connected to the water jacket of the engine 5 via flow paths 8b and 8c. One end of each of the flow paths 8b and 8c is connected to the radiator 2, and the other end of each of the flow paths 8a and 8b is connected to the water jacket of the engine 5. This allows the cooling medium to circulate between the engine 5 and the radiator 2.

[0030] The engine 5 is provided with a pump 6. The pump 6 is disposed on the inlet side of the water jacket. When the pump 6 is driven, the cooling medium circulates between the engine 5 and the radiator 2. As a result, the cooling medium cooled by the radiator 2 is supplied to the engine 5, and the engine 5 can be cooled by the cooled cooling medium.

[0031] The sealed tank 1 is connected to each of the radiator 2 and the engine 5 through flow paths 8a and 8b. The flow path 8a is a make-up line. One end of the flow path 8a is connected to the sealed tank 1, and the other end of the flow path 8a is connected to the flow path 8b. This allows the cooling medium supplied to the sealed tank 1 to be supplied to each of the radiator 2 and the engine 5 through the flow paths 8a and 8b.

[0032] The radiator 2 and the sealed tank 1 are connected by an air vent hose 8d. The engine 5 and the sealed tank 1 are connected by an air vent hose 8e. This makes it possible to vent the air inside the radiator 2 and the engine 5 to the sealed tank 1 through the air vent hoses 8d and 8e when supplying cooling medium to the radiator 2 and the engine 5, respectively.

[0033] An overflow hose 8f is connected to the sealed tank 1. This makes it possible to discharge the cooling medium excessively supplied into the sealed tank 1 to the outside of the sealed tank 1 through the overflow hose 8f.

[0034] The sealed tank 1 has a supply port (opening) 1b. The supply port 1b connects the internal space of the sealed tank 1 with the outside. The supply port 1b is for supplying a cooling medium to the internal space of the sealed tank 1. The supply port 1b is provided in a mouth portion 1c provided on the upper surface of the body of the sealed tank 1. The supply port 1b can be opened and closed by a pressure cap 1a. By closing the supply port 1b with the pressure cap 1a, the internal space of the sealed tank 1 can be sealed.

[0035] The sealed tank 1 has a portion that is located higher than both the upper end 2U of the radiator 2 and the upper end 5U of the engine 5. For example, the entire sealed tank 1 may be located higher than both the upper end 2U of the radiator 2 and the upper end 5U of the engine 5.

[0036] When supplying the cooling medium to each of the engine 5 and the radiator 2, first, the pressure cap 1a of the sealed tank 1 is removed from the body of the sealed tank 1. This opens the supply port 1b of the sealed tank 1. The cooling medium is supplied to the internal space of the sealed tank 1 from the open supply port 1b.

[0037] The cooling medium supplied to the sealed tank 1 is supplied from the lower part of each of the radiator 2 and the engine 5 through the flow paths 8a and 8b, which form the makeup line. By continuing to supply the cooling medium, the insides of the radiator 2 and the engine 5 are filled with the cooling medium.

[0038] As a result, the air inside the radiator 2 and the engine 5 is released through the air vent hoses 8d and 8e into the sealed tank 1. The air that has been released into the sealed tank 1 is discharged to the outside of the sealed tank 1 through the supply port 1b.

[0039] The sealed tank 1 is disposed at a position higher than the upper ends 2U, 5U of the radiator 2 and the engine 5. Therefore, when the water level of the cooling medium in the sealed tank 1 becomes stable, it is understood that the insides of the radiator 2 and the engine 5 are filled with the cooling medium. After the insides of the radiator 2 and the engine 5 are filled with the cooling medium, the supply of the cooling medium is stopped. Thereafter, the supply port 1b of the sealed tank 1 is closed by the pressure cap 1a, and the internal space of the sealed tank 1 is put into a sealed state.

[0040] In this way, the sealed tank 1 is disposed at a position higher than the upper ends 2U and 5U of the radiator 2 and the engine 5, so that the water level of the cooling medium is maintained in the sealed tank 1, and the insides of the radiator 2 and the engine 5 can be filled with the cooling medium. Furthermore, the sealed tank 1 is disposed at a position higher than the upper ends 2U and 5U of the radiator 2 and the engine 5, so that an air space can be created in the sealed tank 1 even when the insides of the radiator 2 and the engine 5 are filled with the cooling medium. Therefore, even if the volume of the cooling medium changes due to heat when the inside of the sealed tank 1 is sealed, the air space in the sealed tank 1 can accommodate the change in volume of the cooling medium. Furthermore, the supply port 1b of the sealed tank 1 is closed by the pressure cap 1a, so that the internal space of the sealed tank 1 can be sealed. Therefore, it is possible to prevent the heated cooling medium from evaporating and leaking out of the sealed tank 1.

[0041] In the above, the cooling medium is, for example, water, but is not limited to water and may be a fluid other than water. Also, in the above, the sealed tank 1 with a sealed internal space was described as the tank, but the tank is not limited to a sealed one and may be an unsealed tank with an internal space open to the outside.

[0042] Further, the radiator 2 is formed of, for example, a heat exchanger, but it may be anything that can cool the cooling medium by releasing the heat of the cooling medium.

[0043] <Engine cooling system layout>

[0044] Next, the layout of the engine cooling system shown in FIG. 2, particularly the layout of the sealed tank 1, will be described with reference to FIGS.

[0045] Fig. 3 is a diagram showing the positional relationship between the sealed tank and the radiator as viewed from the rear. Fig. 4 is a top view of the work vehicle showing the arrangement of the sealed tank as viewed from above. Fig. 5 is a diagram showing the positional relationship between the sealed tank and the headrest of the driver's seat as viewed from the front.

[0046] 3, the radiator 2 is disposed in the internal space of the rotating body 13 together with the engine 5. The radiator 2 and the engine 5 are covered by an exterior panel 13P and a counterweight CW. The exterior panel 13P has, for example, an engine hood 13a, a side panel 13b, and the like.

[0047] The engine hood 13a covers the engine 5 and the radiator 2 from above. The pair of left and right side panels 13b sandwich the engine 5 and the radiator 2 in the left-right direction Y. The pair of left and right side panels 13b cover the sides of the engine 5 and the radiator 2. The rear sides of the engine 5 and the radiator 2 are covered by counterweights CW.

[0048] A through hole TH is provided in the engine hood 13a. The through hole TH connects the internal space of the rotating body 13 to the outside. The sealed tank 1 is arranged so as to pass through the through hole TH. The lower part of the sealed tank 1 is arranged in the internal space of the rotating body 13. The upper part of the sealed tank 1 protrudes to the outside of the rotating body 13 through the through hole TH. As a result, the sealed tank 1 is arranged so as to protrude upward in the vertical direction Z from the upper surface 13U of the engine hood 13a. The part of the sealed tank 1 protruding upward from the upper surface 13U of the engine hood 13a may be covered by a cover, a panel, or the like.

[0049] The sealed tank 1 has a portion that is located higher than the upper end 2U of the radiator 2 and the upper end 5U of the engine 5. The entire sealed tank 1 may be located higher than the upper end 2U of the radiator 2 and the upper end 5U of the engine 5. The lower end 1L of the sealed tank 1 is located higher than both the upper end 2U of the radiator 2 and the upper end 5U of the engine 5.

[0050] The sealed tank 1 is disposed avoiding the region UR directly above the radiator 2. The sealed tank 1 is disposed offset in the left-right direction Y with respect to the region UR directly above the radiator 2. The sealed tank 1 is disposed on the opposite side of the radiator 2 from the engine 5 in the left-right direction Y. The region UR directly above the radiator 2 is a region obtained by extending the maximum width of the radiator 2 in the left-right direction Y upward in the up-down direction Z.

[0051] The radiator 2 has a core portion, an upper tank connected to the upper end of the core portion, and a lower tank connected to the lower end of the core portion. The upper end 2U of the radiator 2 means the upper end of the core portion of the radiator 2, but may also be the upper end of the upper tank of the radiator 2.

[0052] 4, the sealed tank 1 is disposed behind the cab 14. The sealed tank 1 is disposed within an area R4 directly behind the cab 14 in a top view, and does not protrude from this area R4. The area R4 directly behind the cab 14 is an area obtained by extending the maximum width of the cab 14 in the left-right direction Y rearward in the front-rear direction X.

[0053] The sealed tank 1 is disposed in an area R3 directly behind the rear window RW of the driver's cab 14 in a top view and does not protrude from the area R3. The area R3 directly behind the rear window RW is an area obtained by extending the maximum width of the rear window RW in the left-right direction Y rearward in the front-rear direction X.

[0054] The sealed tank 1 is disposed in a region R2 directly behind the driver's seat 14S in a top view. The sealed tank 1 may protrude from the region R2, but it is preferable that the sealed tank 1 does not protrude from the region R2. The region R2 directly behind the driver's seat 14S is a region obtained by extending the maximum width of the driver's seat 14S in the left-right direction Y rearward in the front-rear direction X.

[0055] The sealed tank 1 is located in an area R1 directly behind the headrest P3 of the driver's seat 14S. The sealed tank 1 may or may not protrude from the area R1. The area R1 directly behind the headrest P3 is an area obtained by extending the maximum width of the headrest P3 in the left-right direction Y rearward in the front-rear direction X.

[0056] The headrest P3 has a first side end portion SE1 and a second side end portion SE2 which face each other in the left-right direction Y. The first side end portion SE1 is, for example, the right end of the headrest P3, and the second side end portion SE2 is, for example, the left end of the headrest P3. The sealed tank 1 is located in a region sandwiched between a first straight line SL1 connecting the center SC1 of the driver's seat 14S and the first side end portion SE1 of the headrest P3, and a second straight line SL2 connecting the center SC1 of the driver's seat 14S and the second side end portion SE2 of the headrest P3, in a top view, and does not protrude from this region.

[0057] The center SC1 of the driver's seat 14S is the intersection of the diagonals of a substantially rectangular shape formed by the outer shapes of the seat P1 and backrest P2 of the driver's seat 14S in a top view. In other words, the center SC1 of the driver's seat 14S is the intersection of the diagonal line connecting the corners C1 and C4 of the driver's seat 14S and the diagonal line connecting the corners C2 and C3 of the driver's seat 14S in a top view.

[0058] When viewed from above, the sealed tank 1 is located within the area sandwiched between a first straight line SL3 connecting the center SC2 of the seat P1 and the first side end SE1 of the headrest P3, and a second straight line SL4 connecting the center SC2 of the seat P1 and the second side end SE2 of the headrest P3, and does not extend beyond this area.

[0059] The center SC2 of the seat P1 is the intersection of the diagonals of the substantially rectangular shape of the seat P1 in top view. In other words, the center SC2 of the seat P1 is the intersection of the diagonal line connecting the corners C1 and C6 of the seat P1 and the diagonal line connecting the corners C2 and C5 of the seat P1 in top view.

[0060] As shown in FIG. 5, in a front view, a portion of the sealed tank 1 protruding upward from an upper surface 13U of the engine hood 13a is disposed so as to overlap a headrest P3 of the driver's seat 14S.

[0061] In the front view, the upper end 1U of the sealed tank 1 may be located at a position higher than the upper end P3U of the headrest P3. In this case, since the sealed tank 1 can be disposed at a higher position in the vertical direction Z, the height of the radiator 2 can also be increased, and the cooling effect of the engine 5 can be improved.

[0062] In addition, in a front view, the upper end 1U of the sealed tank 1 may be located at a position lower than the upper end P3U of the headrest P3. In this case, the rearward visibility of the operator seated in the driver's seat 14S becomes even better.

[0063] In the front view, it is even better if the sealed tank 1 overlaps with the headrest P3 and does not protrude from the headrest P3 in the left-right direction Y. That is, as shown in Fig. 4, it is even better if the sealed tank 1 overlaps with the headrest P3 and does not protrude from the headrest P3 in the left-right direction Y. In other words, it is sufficient that the sealed tank 1 is located within the area R1 directly behind the headrest P3 of the driver's seat 14S and does not protrude from the area R1 in the left-right direction Y. This further improves the rear visibility of the operator seated in the driver's seat 14S.

[0064] 5, the sealed tank 1 may overlap the headrest P3 and may protrude from the headrest P3 in the left-right direction Y. This increases the degree of freedom in arranging the sealed tank 1.

[0065] In a front view, the sealed tank 1 may overlap with the backrest P2 of the driver's seat 14S. In a front view, the sealed tank 1 may be within the range of the rear window RW and overlap with an area RHR obtained by extending the maximum dimension of the headrest P3 in the left-right direction Y in the up-down direction Z.

[0066] <Effects>

[0067] Next, the effects of this embodiment will be described.

[0068] In this embodiment, as shown in Fig. 5, the sealed tank 1 is arranged so as to overlap with the headrest P3 of the driver's seat 14S in a front view. This prevents the sealed tank 1 from entering the rear view through the rear window RW of the operator seated in the driver's seat 14S as shown in Fig. 6. This improves the rear view of the operator seated in the driver's seat 14S, improving workability.

[0069] 3, in this embodiment, the sealed tank 1 has a portion that is located higher than the upper end 2U of the radiator 2. This allows the water level of the cooling medium in the sealed tank 1 to be higher than the upper end 2U of the radiator 2, making it possible to fill the radiator 2 with the cooling medium.

[0070] 3, in this embodiment, the sealed tank 1 is arranged to avoid the area UR directly above the radiator 2. This increases the degree of freedom in arranging the sealed tank 1, and makes it possible to arrange the sealed tank 1 so as to overlap the headrest P3 of the driver's seat 14S in a front view.

[0071] 4, in this embodiment, the sealed tank 1 is located in a region between a first straight line SL1 connecting the center SC1 of the driver's seat 14S and a first side end SE1 of the headrest P3, and a second straight line SL2 connecting the center SC1 of the driver's seat 14S and a second side end SE2 of the headrest P3 in a top view. This makes it difficult for the sealed tank 1 to be in the rear field of view of the operator seated in the driver's seat 14S, improving rear visibility.

[0072] 2, the sealed tank 1 has a supply port 1b and a pressure cap 1a that seals the supply port 1b. By closing the supply port 1b with the pressure cap 1a after supplying the cooling medium to the sealed tank 1, the cooling medium evaporated by heat is prevented from leaking from the inside of the sealed tank 1 to the outside.

[0073] 3, the cab 14 has a rear window RW behind the cab 14S, which allows the operator to see the outside from inside the cab 14. This allows the operator seated in the cab 14S to see the rear of the work vehicle 10 through the rear window RW, even if the cab 14S is located inside the cab 14, as shown in FIG.

[0074] <Additional Notes>

[0075] The above-described embodiment includes the following technical ideas.

[0076] (Appendix 1) A driver's seat having a headrest; The engine, a radiator for cooling a cooling medium for the engine; an engine hood covering an upper portion of the radiator; a tank that stores the cooling medium to be replenished to the radiator and protrudes upward from an upper surface of the engine hood, A work vehicle, wherein the tank is positioned so as to overlap the headrest of the driver's seat in a front view.

[0077] (Appendix 2) The headrest has a first side end portion and a second side end portion opposed to each other in a left-right direction, 2. The work vehicle described in Appendix 1, wherein the tank is located within an area between a first line connecting a center of the driver's seat and the first side end of the headrest, and a second line connecting a center of the driver's seat and the second side end of the headrest, when viewed from above.

[0078] (Appendix 3) 3. The work vehicle according to claim 1 or 2, wherein the tank has a portion that is positioned higher than an upper end of the radiator.

[0079] (Appendix 4) 4. The work vehicle according to claim 1, wherein the tank is positioned to avoid a region directly above the radiator, and is thus shifted in the left-right direction with respect to the region directly above the radiator.

[0080] (Appendix 5) 5. The work vehicle according to any one of claims 1 to 4, wherein the tank has an opening and a cap that seals the opening.

[0081] (Appendix 6) The vehicle further includes a driver's cab for storing the driver's seat therein, 6. The work vehicle according to any one of appendix 1 to appendix 5, wherein the driver's cab has a window behind the driver's seat that allows the outside to be seen from inside the driver's cab.

[0082] The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0083] 1 sealed tank, 1L lower end, 1U, 2U, 5U, P3U upper end, 1a pressure cap, 1b supply port, 1c port, 2 radiator, 5 engine, 6 pump, 8a, 8b, 8c flow path, 8d, 8e air bleed hose, 8f overflow hose, 10 work vehicle, 11 main body, 12 work equipment, 13 rotating body, 13P exterior panel, 13U upper surface, 13a engine hood, 13b side panel, 14 driver's cab, 14S driver's seat, 15 running body, 15Cr track, 15M running motor, 16 boom, 17 arm, 18 bucket, 19a boom cylinder, 19b arm cylinder, 19c bucket cylinder, AT arm top pin, BF boom foot pin, BT boom top pin, C1, C2, C3, C4, C5, C6 Corner, CW counterweight, P1 seat, P2 backrest, P3 headrest, R1, R2, R3, R4, RHR area, RW rear window, RX swivel axis, SC1, SC2 centre, SE1 first side end, SE2 second side end, SL1, SL3 first straight line, SL2, SL4 second straight line, TH through hole, UR directly above area.

Claims

1. A driver's seat having a headrest; The engine, a radiator for cooling a cooling medium for the engine; an engine hood covering an upper portion of the radiator; a tank that stores the cooling medium to be replenished to the radiator and protrudes upward from an upper surface of the engine hood, A work vehicle, wherein the tank is positioned so as to overlap the headrest of the driver's seat in a front view.

2. The headrest has a first side end portion and a second side end portion opposed to each other in a left-right direction, 2. The work vehicle according to claim 1, wherein the tank is located within an area between a first straight line connecting a center of the driver's seat and the first side end of the headrest, and a second straight line connecting a center of the driver's seat and the second side end of the headrest, when viewed from above.

3. The work vehicle according to claim 1 , wherein the tank has a portion that is positioned higher than an upper end of the radiator.

4. The work vehicle according to claim 1 , wherein the tank is positioned to avoid a region directly above the radiator, and is thus shifted in the left-right direction with respect to the region directly above the radiator.

5. The work vehicle according to claim 1 , wherein the tank has an opening and a cap that seals the opening.

6. The vehicle further includes a driver's cab for storing the driver's seat therein, The work vehicle according to claim 1 , wherein the cab has a window behind the cab through which the outside can be seen from inside the cab.

Images