Hitachi Construction Machinery Co., Ltd.

Koji Tahara

Masaki Kanahara

Genroku Sugiyama

Toichi Hirata

Kazuhiko Hiraoka

Masakazu Haga

Kazuhiko Nishiyama

Tsuyoshi Sakyo

Akitaka Takeuchi

Kazuhisa Tamura

Shingo Hirose

Sadahisa Tomita

Yoshiki Yoshida

Ryohei Suzuki

Toshio Hasegawa

Shigehisa Funabashi

Koji Kawasaki

Zenji Kaneko

Yasushi Konomura

Masakazu Hasa

In a working apparatus, a recessed portion is formed at an end surface of a pin provided at a boom to house a case of an angle sensor in the recessed portion. A flange is projected from the case along the direction of the axis of an input shaft so as to enclose the input shaft outside the movement range of a lever. By projecting the flange further out than the distance over which the input axis projects out, the protection provided by the flange for the input shaft is enhanced.

Working apparatus for construction machine

In an engine cooling system which includes an intercooler for precooling combustion air supplied to an engine, an oil cooler for cooling a hydraulic working fluid for use in a hydraulic excavator, a radiator for cooling cooling water supplied to the engine, a cooling fan in the form of a centrifugal fan, and a suction duct for introducing the cooling air to the suction side of the cooling fan, an opening diameter of a suction duct downstream end is smaller than an opening diameter of a rotary shroud suction-side end, and the suction duct downstream end is positioned inside the rotary shroud suction-side end in overlapped relation.

Engine cooling apparatus

Hydraulic excavator

Growing community of inventors

Shimodate, Japan

Koji Tahara