Construction machine

Patent metadata

Field	Value
Publication number	US-11448115-B2
Application number	US-201916979347-A
Country	US
Kind code	B2
Filing date	Aug 1, 2019
Priority date	Aug 6, 2018
Publication date	Sep 20, 2022
Grant date	Sep 20, 2022

Abstract

Two oil coolers (30, 32) are disposed so as to face each other in a front half of the inside of a heat exchanger chamber (26) defined in an upper revolving body (5), one oil cooler (31) is disposed in a rear half, and a space (E) formed between the oil coolers is used as work and passage spaces. Outside air as cooling air is allowed to pass through the respective oil coolers (30 to 32) by cooling fans (35), and cooling air that has passed through each of the two oil coolers (30, 32) disposed so as to face each other is made to mutually collide, and is discharged to the outside through a side outlet (38) of a front wall (26a) and a first upper outlet (39) of a ceiling (26e) of the heat exchanger chamber (26). Cooling air that has passed through the other one oil cooler (31) is made to collide with a left side wall (26c), and is discharged to the outside through a second upper outlet (40) of the ceiling (26e).

First claim

The invention claimed is:

1. A construction machine comprising:
a heat exchanger chamber defined in a machine body;
at least a pair of first heat exchangers that are disposed so as to face each other at a gap through which a worker is able to pass in the heat exchanger chamber, each of the first heat exchangers allowing outside air as cooling air to pass therethrough to be cooled, the outside air being introduced into the heat exchanger chamber from outside by a cooling fan; and
a side outlet that is opened at a portion equivalent to a portion between both the first heat exchangers in a first side wall of the heat exchanger chamber, and that allows cooling air to discharge to lateral outside, the cooling air having passed through each of the first heat exchangers to mutually collide inside the heat exchanger chamber.

2. The construction machine according to claim 1 , further comprising
a first upper outlet that is opened at a portion equivalent to a portion between both the first heat exchangers in a ceiling of the heat exchanger chamber, and that allows the cooling air to discharge to upper outside, the cooling air having passed through each of the first heat exchangers to mutually collide inside the heat exchanger chamber.

3. The construction machine according to claim 2 , further comprising:
a second heat exchanger aligned with any one of the first heat exchangers in the heat exchanger chamber; and
a second upper outlet that is opened at a portion equivalent to a portion directly above a second side wall facing the second heat exchanger in the ceiling of the heat exchanger chamber, and that allows cooling air to discharge to upper outside, the cooling air having passed through the second heat exchanger to collide with the second side wall.

4. The construction machine according to claim 1 , wherein
the cooling fan of each of the first heat exchangers is rotationally driven by an inclined shaft type plunger hydraulic motor, and
cylinder blocks of the inclined shaft type plunger hydraulic motors each protrude in the heat exchanger chamber in a posture inclined to a rotating shaft, and mutual inclination directions of the cylinder blocks are set oppositely so as to form the gap through which a worker is able to pass.

5. The construction machine according to claim 1 , wherein
the cooling fans of the first heat exchangers are rotationally driven in the same direction, and fin shapes are reciprocally set in opposite inclinations so as to enable outside air to be introduced into the heat exchanger.

Assignees

• Hitachi Construction Mach Co

Inventors

• Seo Koji
• Ishii Nobuhiro
• Sato Kei

Classifications

• F01P5/04

  Pump-driving arrangements · CPC title

• E02F3/32

  working downwardly and towards the machine, e.g. with backhoes · CPC title

• F01P5/06

  Guiding or ducting air to, or from, ducted fans · CPC title

• F01P2003/182

  with multiple heat-exchangers · CPC title

• F01P3/18 Primary

  Arrangements or mounting of liquid-to-air heat-exchangers (such arrangements on cylinders or cylinder heads F01P3/04; relative to vehicles B60K11/04) · CPC title