Tractor

• US 10,207,577 B2
• Filed: 12/08/2015
• Issued: 02/19/2019
• Est. Priority Date: 10/23/2015
• Status: Active Grant

• Current Assignee: Komatsu Ltd.
• Original Assignee: Komatsu Ltd.
• Inventors: Oshikawa, Yuushi, Noda, Takashi, Ozaki, Taira, Uemura, Takuya, Takahashi, Yuya, Hirayama, Masami, Itogawa, Hiroshi
• Primary Examiner(s): Shriver, II, James A
• Assistant Examiner(s): Clemmons, Steve
• Application Number:
  US15/553,325
• Publication Number:
  US 20180056776A1
• Time in Patent Office: 1,169 Days
• CPC Class Codes: B60H 1/00457 Ventilation unit, e.g. combined with a radiator control systems for ventilators B60H1/00828
• 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: B60K 11/08 Air inlets for cooling; Shutters or blinds therefor radiator or grille guards B60R19/52
• CPC Class Codes: B60Y 2200/411 Bulldozers, Graders
• CPC Class Codes: B62D 49/00 Tractors of walk type B62D51/04; endless- track features B62D55/00 ; transport specially adapted for underground galleries E21F13/02
• CPC Class Codes: E02F 3/7604 Combinations of scraper blades with soil loosening tools working independently of scraper blades soil loosening attachments fixed on blades E02F3/8152, E02F3/8155
• 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: E02F 9/205 Remotely operated machines, e.g. unmanned vehicles E02F3/8866 takes precedence

Abstract

A tractor includes a vehicle body, an engine, a cooling device, a fan, and a first exterior member. The engine is disposed on the front side of the vehicle body. The cooling device is disposed behind the engine. The fan is arranged to produce cooling air for the cooling device. The first exterior member is disposed on the front side of the vehicle body and covers the engine, the cooling device, and the fan. A first discharge port is arranged to discharge the cooling air and is provided in a first side surface of the first exterior member. The front side surface is positioned on a first side in the vehicle left-right direction. The front surface of the first exterior member includes no opening.

Claims

1. A tractor comprising:

a vehicle body;

an engine disposed on a front side of the vehicle body;

a cooling device disposed behind the engine;

a fan arranged to produce cooling air for the cooling device;

a first exterior member that covers the engine, the cooling device and the fan; and

a second exterior member located behind the first exterior member, the second exterior member including a first intake port arranged to suck in outside air to serve as the cooling air,

the first exterior member being disposed on the front side of the vehicle body,

a first discharge port arranged to discharge the cooling air being provided in a first side surface of the first exterior member, the first side surface being positioned on a first side in a vehicle left-right direction,

a front surface of the first exterior member including no opening,

a second intake port being provided in a rear surface of the first exterior member, the second intake port being arranged to suck in the outside air sucked in through the first intake port and the rear surface being positioned behind the engine, and

the first intake port is positioned farther rearward than the second intake port in a vehicle front-rear direction.

2. The tractor according to claim 1, wherein

the first intake port is provided in a second side surface of the second exterior member, the second side surface being positioned on a second side opposite the first side.

3. The tractor according to claim 1, wherein

the vehicle body has a work area facing a rear surface of the first exterior member.

4. The tractor according to claim 3, wherein

the work area is surrounded by an engine compartment covered by the first exterior member, a left housing portion, a right housing portion, and a rear housing portion.

5. The tractor according to claim 1, wherein

the cooling device is an after-cooler.

6. The tractor according to claim 1, wherein

a second discharge port is further provided in a third side surface of the first exterior member, the second discharge port is arranged to discharge the cooling air, and the third side surface is positioned on a second side opposite the first side.

7. The tractor according to claim 1, further comprising:

a crawler belt; and

an excavation blade disposed on the front side of the vehicle body.

8. The tractor according to claim 7, further comprising:

a first arm with one end attached to a first side portion of the vehicle body positioned on the first side; and

a second arm with one end attached to a second side portion of the vehicle body positioned on a second side opposite the first side,

the first and second arms being attached at other ends thereof to a rear surface of the excavating blade,

the first discharge port facing one of the first and second arms as seen in a top view.

9. The tractor according to claim 1, wherein

a work area is provided rearward of the engine, the work area being surrounded by the first exterior member, the second exterior member, and a third exterior member disposed rearward of the first exterior member, the second exterior member and the third exterior member being arranged on opposite sides of the tractor in the vehicle left-right direction.

10. The tractor according to claim 9, further comprising

a rear housing portion disposed rearward of the second exterior member and the third exterior member, the work area being surrounded by the first exterior member, the second exterior member, the third exterior member, and the rear housing portion.

11. The tractor according to claim 10, further comprising

a lid member arranged and configured to cover the work area, the lid member being arranged above the work area.

12. The tractor according to claim 11, wherein

the lid member can be opened and closed, and

when the lid member is closed, air drawn in through the first intake port passes through the work area and enters the second intake port.