Kobelco Construction Machinery Co., Ltd.

Hidenori Matsunaga

Tomotaka Kita

Michio Hirayama

Seiichi Onishi

Ayumu Tokuda

Hideki Hayashi

Masanori Takemoto

Shigeyuki Oda

Shinichiro Amano

Atsushi Hirahara

It is intended to suppress occurrence of a crack in a fixed portion of a tube with respect to a tank. A plurality of tubes (A toD) are fixed to a sidewall () in a state in which they penetrate through the sidewall () via respective ones of a plurality of through-holes () formed in the sidewall () in such a manner as to be arrayed in a line along a longitudinal direction. A heat exchanger () comprises a protective member () fixed to the sidewall () to protect a nearest tube (A) nearest to an end wall () among the plurality of tubes (A toD), wherein the protective member () has a barrier portion () interposed between the end wall () and an outlet-side end portion () of the nearest tube (A) disposed inside the sidewall ().

Heat exchanger

A muffler including an inlet member, an outlet member, an exhaust-gas cleaning device including an exhaust-gas cleaning material, the exhaust-gas cleaning device including a first inlet side coupling section and a first outlet side coupling section detachably coupled to the inlet member and the outlet member by couplers, and an intermediate member including a second inlet side coupling section and a second outlet side coupling section detachably coupled to the inlet member and the outlet member by couplers same as the couplers, instead of the exhaust-gas cleaning device. The intermediate member is a cylinder body allowing exhaust gas in the inlet member to flow directly to the outlet member without passing through the exhaust gas cleaning material, and includes a resistance generation section providing the intermediate member with exhaust resistance substantially equal to that of the exhaust-gas cleaning device.

Muffler for construction machine

Provided is a construction machine capable of suppressing overcooling of fluid by heat exchangers, while requiring only a small space. The construction machine includes: a lower travel body; an upper slewing body mounted on the lower travel body and having an engine compartment; an engine compartment cover covering the engine compartment; an air filter which collects dust in outside air taken into the engine compartment and has a filter surface; a heat exchanger disposed downstream of the air filter in an air flow direction and having a core surface; an air filter holding section holding the air filter removably in an attitude opposing the filter surface of the air filter to the core surface of the heat exchanger; and a shut member installed removably on the air filter to shut at least a part of the filter surface.

Construction machine having cooling function

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Hiroshima, Japan

Hidenori Matsunaga