Construction machine

• US 10,640,949 B2
• Filed: 03/10/2016
• Issued: 05/05/2020
• Est. Priority Date: 03/10/2016
• Status: Active Grant

• Current Assignee: Hitachi Construction Machinery Company Limited (Hitachi, Ltd.)
• Original Assignee: Hitachi Construction Machinery Company Limited (Hitachi, Ltd.)
• Inventors: Hirasawa, Shigeru, Hibiya, Takeshi, Kanno, Toshikazu, Mizoguchi, Kazuhiko
• Primary Examiner(s): Dickson, Paul N
• Assistant Examiner(s): Wilhelm, Timothy
• Application Number:
  US15/752,747
• Publication Number:
  US 20180238020A1
• Time in Patent Office: 1,517 Days
• 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: B60K 15/063 Arrangement of tanks
• CPC Class Codes: B60K 15/067 Mounting of tanks
• CPC Class Codes: B60K 2015/03414 associated with the fuel tank for cooling heated fuel
• CPC Class Codes: B60K 2015/03421 to protect the fuel tank against heat
• CPC Class Codes: B60Y 2200/412 Excavators
• CPC Class Codes: E02F 3/32 working downwardly and towards the machine, e.g. with backhoes
• 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: E02F 9/0883 Tanks, e.g. oil tank, urea tank, fuel tank for vehicles in general B60K15/00
• CPC Class Codes: E02F 9/0891 Lids or bonnets or doors or details thereof doors for cabins E02F9/163 takes precedence; for motor vehicles B62D25/10

Abstract

To make a reserve tank be hardly affected by the heat of an engine. An engine room (5) is totally covered by an exterior cover (9) including openings (44) at the upper surface, and includes in the inside thereof an engine (13), a radiator (24), a cooling fan (20) for sucking external air and cooling the radiator, and a reserve tank (30) for storing cooling water of the engine. The reserve tank (30) is disposed at a position above the engine (13) and facing the openings (44) and a position on the upstream side of the flow of the air with respect to the openings (44).

Claims

1. A construction machine, comprising:

a travel base; and

a revolving upperstructure that is turnably attached to the travel base and includes a working device in the front, a counterweight in the rear, and an engine room between the working device and the counterweight,

wherein the engine room is totally covered by an exterior cover that includes an opening at an upper surface, and includes an engine, a radiator, a cooling fan, and a reserve tank in the inside of the engine room, the cooling fan sucking external air and cooling the radiator, the reserve tank storing cooling water of the engine,

a flow of air inside the engine room is formed so that external air sucked into the engine room by the cooling fan is discharged from the opening,

a protrusion portion which protrudes upward for covering an upper surface of the reserve tank is formed on the upper surface of the exterior cover,

the opening is disposed at a side surface of the protrusion portion, and

the reserve tank is disposed at a position which is at a center of and above the engine and facing the opening and a position on the upstream side of the flow of the air with respect to the opening.

2. The construction machine according to claim 1, wherein

the radiator, the cooling fan, and the engine are disposed in this order from the upstream side to the downstream side of the flow of the air,

a space for maintenance is formed between the cooling fan and the engine, and

the reserve tank is disposed at a position escaping the space for maintenance and a position above the radiator.