COOLER FOR CONSTRUCTION MACHINERY, AND CONSTRUCTION MACHINERY

WIPO Patent Application WO/1999/015794

A1

A cooler for construction machinery, having at least one heat exchanger including a radiator (9) for cooling the cooling water for an engine (8) of a hydraulic shovel, and a cooling fan (11) for generating a cooling air flow (P) for cooling the heat exchanger when a rotary shaft (10) is driven, wherein a substantially disk-shaped fluid guide means (12) whose outer diameter Do is smaller than the outside diameter D of the cooling fan (11) is provided on the outlet side of the cooling fan (11). Thus the noise can be reduced more than conventional while ensuring a sufficient amount of cooling air in coping with the trend toward stricter noise regulation of construction machinery.

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Takeshita, Seiichirou (Onozato Heights 105 4-5, Kandatsuhigashi 1-chome Tsuchiura-shi Ibaraki, 300-0012, JP)
Watanabe, Osamu (Shiho-ryo 312 20-29, Kandatsuchuo 2-chome Tsuchiura-shi Ibaraki, 300-0011, JP)

PCT/JP1998/004207

April 01, 1999

September 18, 1998

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HITACHI CONSTRUCTION MACHINERY CO., LTD. (6-2 Ohtemachi 2-chome Chiyoda-ku Tokyo, 100-0004, JP)
Takeshita, Seiichirou (Onozato Heights 105 4-5, Kandatsuhigashi 1-chome Tsuchiura-shi Ibaraki, 300-0012, JP)
Watanabe, Osamu (Shiho-ryo 312 20-29, Kandatsuchuo 2-chome Tsuchiura-shi Ibaraki, 300-0011, JP)

E02F9/08; F01P11/12; F04D19/00; F04D29/52; F04D29/66; F01P5/06; (IPC1-7): F04D29/44; F04D29/66; F01P11/10; E02F9/00; E02F9/16; F25D1/00

Kasuga, Yuzuru (Kyodo Building-Shinkodenmacho 7th floor 1-3, Nihonbashi-Kodenmacho Chuo-ku Tokyo, 103-0001, JP)

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