Title:
FAN DRIVE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2008/023516
Kind Code:
A1
Abstract:
A flow rate control valve (37) controlled based on coolant temperature is placed
in an oil path for supplying oil to a hydraulic motor (35) from a variable displacement
pump (1) in which the swash plate angle is controlled by a displacement control
device (2). A pilot oil path (83) for detecting load pressure of the hydraulic
motor (35) is connected to a shuttle valve (29) via a load pressure separation
valve (45). To the shuttle valve (29) are led a maximum load pressure in a working
machine circuit (33) and load pressure in a pilot oil path (80). High-pressure-side
load pressure selected by the shuttle valve (29) is led to the displacement control
device (2) via a pilot oil path (85). The load pressure separation valve (45)
is controlled by load pressure from a pilot oil path (79). When load pressure
is generated in the working machine, the load pressure separation valve (45)
shuts off the communication between the pilot oil path (83) and the shuttle valve
(29) to supply tank pressure to the shuttle valve (29).
Inventors:
KATAOKA, Toyomi (Komatsu Ltd. 400 Yokokura Shinden, Oyama-sh, Tochigi 58, 3238558, JP)
片岡 豊美 (〒58 栃木県小山市横倉新田４００ 株式会社小松製作所 小山工場内 Tochigi, 3238558, JP)
FUKUSHIMA, Junichi (Komatsu Ltd. 400 Yokokura Shinden, Oyama-sh, Tochigi 58, 3238558, JP)
福島 純一 (〒58 栃木県小山市横倉新田４００ 株式会社小松製作所 小山工場内 Tochigi, 3238558, JP)
片岡 豊美 (〒58 栃木県小山市横倉新田４００ 株式会社小松製作所 小山工場内 Tochigi, 3238558, JP)
FUKUSHIMA, Junichi (Komatsu Ltd. 400 Yokokura Shinden, Oyama-sh, Tochigi 58, 3238558, JP)
福島 純一 (〒58 栃木県小山市横倉新田４００ 株式会社小松製作所 小山工場内 Tochigi, 3238558, JP)
Application Number:
JP2007/064270
Publication Date:
February 28, 2008
Filing Date:
July 19, 2007
Export Citation:
Assignee:
KOMATSU LTD. (3-6 Akasaka 2-chome, Minato-ku Tokyo, 14, 1078414, JP)
株式会社小松製作所 (〒14 東京都港区赤坂二丁目３番６号 Tokyo, 1078414, JP)
KATAOKA, Toyomi (Komatsu Ltd. 400 Yokokura Shinden, Oyama-sh, Tochigi 58, 3238558, JP)
片岡 豊美 (〒58 栃木県小山市横倉新田４００ 株式会社小松製作所 小山工場内 Tochigi, 3238558, JP)
FUKUSHIMA, Junichi (Komatsu Ltd. 400 Yokokura Shinden, Oyama-sh, Tochigi 58, 3238558, JP)
株式会社小松製作所 (〒14 東京都港区赤坂二丁目３番６号 Tokyo, 1078414, JP)
KATAOKA, Toyomi (Komatsu Ltd. 400 Yokokura Shinden, Oyama-sh, Tochigi 58, 3238558, JP)
片岡 豊美 (〒58 栃木県小山市横倉新田４００ 株式会社小松製作所 小山工場内 Tochigi, 3238558, JP)
FUKUSHIMA, Junichi (Komatsu Ltd. 400 Yokokura Shinden, Oyama-sh, Tochigi 58, 3238558, JP)
International Classes:
F01P7/04; E02F9/00; E02F9/22; F15B11/00; F15B21/04
Attorney, Agent or Firm:
NOGUCHI, Takeo et al. (Mutsumi Int.Patent Bureau, Bandai Bldg. 10-14, Kandaawajicho 2-chome, Chiyoda-k, Tokyo 63, 1010063, JP)
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