Kobelco Construction Machinery Co., Ltd.

Toshiyuki Kobayashi

Kazuhiro Ueda

Yasumasa Kimura

Hajime Nakashima

Hideo Utsuno

Engine noise of a construction machine is effectively reduced without reducing cooling performance and with an increase in the height of a body cover kept minimum. To achieve the above, an air-intake opening portion () and an air discharge opening portion () are arranged in a body cover () of an upper rotating body (), and a cooling fan () in an engine room covered by the body cover () is driven, taking cooling air in from the air-intake opening portion () to cool a heat exchanger () in the body cover () and discharging the air from the air discharge opening portion (). The air-intake opening portion () is laterally offset from a position facing to a ventilation surface of the heat exchanger (). Alternatively, plural air-intake opening portions are located in a scattered manner such that the plural air-intake opening portions include the offset air-intake opening portion offset from the ventilation surface of the heat exchanger ().

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Kobe, Japan

Toshiyuki Kobayashi