WORK VEHICLE

• US 20140216833A1
• Filed: 09/04/2012
• Published: 08/07/2014
• Est. Priority Date: 05/24/2012
• Status: Active Grant

• Current Assignee: Komatsu Ltd.
• Original Assignee: Komatsu Ltd.
• Inventors: Fujimori, Hiroyoshi
• Granted Patent: US 8,827,018 B2
• Time in Patent Office: Days
• US Class Current: 180/68.1
• CPC Class Codes: B60K 11/04 Arrangement or mounting of radiators, radiator shutters, or radiator blinds B60K11/085 takes precedence
• CPC Class Codes: B60K 11/06 with air cooling
• CPC Class Codes: E02F 9/0833 Improving access, e.g. for maintenance, steps for improving driver's access, handrails
• CPC Class Codes: E02F 9/0866 Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment
• CPC Class Codes: F01P 3/18 Arrangements or mounting of liquid-to-air heat-exchangers such arrangements on cylinders or cylinder heads F01P3/04; relative to vehicles B60K11/04

Abstract

A first cooling device is disposed in an engine room at the upstream side in the air flow direction with respect to an engine. A second cooling device is disposed at the upstream side in the air flow direction with respect to the first cooling device. A third cooling device is disposed at the upstream side in the air flow direction with respect to the second cooling device. An air pipe connects the engine and the third cooling device. The air pipe passing above the first cooling device and the second cooling device. A blocking member closes off periphery of a space between the first cooling device and the second cooling device. The blocking member includes an opening. A cover member is configured to selectively open and close the opening.

Claims

1. A work vehicle comprising:

a vehicle body including an engine room;

an engine disposed inside the engine room;

a first cooling device disposed in the engine room at an upstream side in an air flow direction with respect to the engine;

a second cooling device disposed at the upstream side in the air flow direction with respect to the first cooling device;

a third cooling device disposed at the upstream side in the air flow direction with respect to the second cooling device;

a first air pipe connecting the engine and the third cooling device, the first air pipe passing above the first cooling device and the second cooling device;

a second air pipe connected to the third cooling device, and disposed in a position adjacent to the first cooling device and the second cooling device in a direction perpendicular to the air flow direction in a horizontal direction;

a blocking member closing off periphery of a space between the first cooling device and the second cooling device, the blocking member including an opening; and

a cover member configured to selectively open and close the opening, the cover member being disposed above the space between the first cooling device and the second cooling device.

2. The work vehicle according to claim 1, wherein a distance between the first cooling device and the second cooling device is larger than either a thickness of the first cooling device in the air flow direction or a thickness of the second cooling device in the air flow direction.

3. The work vehicle according to claim 1, wherein a distance between the first cooling device and the second cooling device is equal to or more than a sum of a thickness of the first cooling device and a thickness of the second cooling device in the air flow direction.

5. The work vehicle according to claim 1 Claim wherein

a portion of the cover member is positioned directly below the air pipe.

6. The work vehicle according to claim 1, further comprising:

a hydraulic pump driven using the engine;

a hydraulic actuator driven using hydraulic fluid discharged from the hydraulic pump; and

an oil cooler for cooling the hydraulic fluid, the first cooling device being a first core of the oil cooler and the second cooling device being a second core of the oil cooler.

7. The work vehicle according to claim 6, further comprising:

a radiator for cooling coolant of the engine, the radiator being disposed to be adjacent to the oil cooler in a direction perpendicular to the air flow direction in the horizontal direction.

8. The work vehicle according to claim 7, wherein

a thickness of the oil cooler in the air flow direction is larger than a thickness of the radiator in the air flow direction.

9. The work vehicle according to claim 8, further comprising:

a fixing frame fixing the oil cooler and the radiator to each other, the fixing frame including;

a first fixing section to which the radiator is fixed; and

a second fixing section to which the oil cooler is fixed, the second fixing section having a shape which protrudes more than the first fixing section in a direction parallel to the air flow direction.

10. The work vehicle according to claim 6, wherein

the third cooling device is an after cooler.

11. The work vehicle according to claim 2, further comprising:

a hydraulic pump driven using the engine;

a hydraulic actuator driven using hydraulic fluid discharged from the hydraulic pump; and

an oil cooler for cooling the hydraulic fluid, the first cooling device being a first core of the oil cooler and the second cooling device being a second core of the oil cooler.

12. The work vehicle according to claim 11, further comprising:

a radiator for cooling coolant of the engine, the radiator being disposed to be adjacent to the oil cooler in a direction perpendicular to the air flow direction.

13. The work vehicle according to claim 11, wherein

the third cooling device is an after cooler.

14. The work vehicle according to claim 3, further comprising:

a hydraulic pump driven using the engine;

a hydraulic actuator driven using hydraulic fluid discharged from the hydraulic pump; and

an oil cooler for cooling the hydraulic fluid, the first cooling device being a first core of the oil cooler and the second cooling device being a second core of the oil cooler.

15. The work vehicle according to claim 14, further comprising:

a radiator for cooling coolant of the engine, the radiator being disposed to be adjacent to the oil cooler in a direction perpendicular to the air flow direction.

16. The work vehicle according to claim 14, wherein

the third cooling device is an after cooler.

17. The work vehicle according to claim 5, further comprising:

a hydraulic pump driven using the engine;

a hydraulic actuator driven using hydraulic fluid discharged from the hydraulic pump; and

an oil cooler for cooling the hydraulic fluid, the first cooling device being a first core of the oil cooler and the second cooling device being a second core of the oil cooler.

18. The work vehicle according to claim 17, further comprising:

a radiator for cooling coolant of the engine, the radiator being disposed to be adjacent to the oil cooler in a direction perpendicular to the air flow direction.

21. The work vehicle according to claim 6, wherein

a thickness of the first core of the oil cooler in the air flow direction is smaller than a thickness of the radiator in the air flow direction, and

a thickness of the second core of the oil cooler in the air flow direction is smaller than a thickness of the radiator in the air flow direction.

4. (canceled)

19. (canceled)

20. (canceled)