Hitachi Construction Machinery Co., Ltd.

Hiroyuki Nishimori

Takeshi Higuchi

Katsumi Miyaki

Tsuyoshi Sakyou

Susumu Sasaki

Seiji Ojima

Takeshi Ishizuka

Tadashi Hiyama

To provide a cold/warm air outlet assembly for construction a machine, said assembly being capable of fully meeting desires on the comfort of a working environment of an operator under air conditioning and use of air conditioning for a multiplicity of purposes, an upper outlet tube and lower outlet tube are formed into substantially tubular shapes having conical circumferential walls with walls, through which air outlets are formed, being included as tilted walls. The upper outlet tube is resiliently fitted and connected to the lower outlet tube and the lower outlet tube is resiliently fitted and connected to a vertical part of an air conditioner duct The upper and lower outlet tubes are, therefore, turnable in horizontal direction at their connected parts. By operating air-direction control knobs arranged in the air outlets directed toward desired turned positions, the vertical directions of the internal fins can be adjusted to cause cold/warm air to blow out in the desired directions, respectively.

Cold and hot air blowing device for construction machinery

Crawler type drive apparatus

A crawler belt drive apparatus which can reduce meshing noises of drive sprocket and crawler belt in a reliable manner over a long period of time. An annular link guide member is provided on a housing of a reducer concentrically with the drive sprocket. As bushes of the respective track links of the crawler belt are meshed with the drive sprocket, the link guide member is held in sliding contact with inner end faces of the track links to maintain a clearance constantly between each bush and a bottom of the drive sprocket, thereby preventing the bushes from directly hitting against the bottom of the drive sprocket to suppress meshing noises or vibrations effectively.

Crawler belt drive apparatus for crawler type vehicles

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Chiyoda-machi, Japan

Hiroyuki Nishimori