Title:
HYDRAULIC CONTROL DEVICE FOR WORK VEHICLE
Document Type and Number:
WIPO Patent Application WO/2011/138963
Kind Code:
A1
Abstract:
A hydraulic control device for a work vehicle is provided with a hydraulic pump which supplies pressure oil; an arm driving actuator whereby an arm mounted on the work vehicle is driven into swinging by the pressure oil supplied by the hydraulic pump; a bucket driving actuator whereby a bucket mounted on the tip of the arm is driven into swinging by the pressure oil supplied by the hydraulic pump; an arm driving pressure oil control valve which controls the pressure oil supplied to the arm driving actuator from the hydraulic pump, and controls the driving of the arm driving actuator; a bucket driving pressure oil control valve which controls the pressure oil supplied to the bucket driving actuator from the hydraulic pump, and controls the driving of the bucket driving actuator; an arm operating section which controls the arm driving pressure oil control valve; a bucket operating section which controls the bucket driving pressure oil control valve; an operation state detection section which detects the operation states of the arm driving actuator and the bucket driving actuator; and a flow rate control valve which restricts the pressure oil supplied to the arm driving actuator, when it is detected by the operation state detection section that the arm driving actuator and the bucket driving actuator are operated in a combined manner.
Inventors:
SHIMAZU, Atsushi (LTD. TSUCHIURA WORKS INTELLECTUAL PROPERTY DEPT. 650 Kandatsu-machi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
島津 淳志 (〒13 茨城県土浦市神立町６５０番地 日立建機株式会社土浦工場 知的財産部内 Ibaraki, 〒3000013, JP)
AZUMA, Hiroyuki (LTD. TSUCHIURA WORKS INTELLECTUAL PROPERTY DEPT. 650 Kandatsu-machi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
東 宏行 (〒13 茨城県土浦市神立町６５０番地 日立建機株式会社土浦工場 知的財産部内 Ibaraki, 〒3000013, JP)
島津 淳志 (〒13 茨城県土浦市神立町６５０番地 日立建機株式会社土浦工場 知的財産部内 Ibaraki, 〒3000013, JP)
AZUMA, Hiroyuki (LTD. TSUCHIURA WORKS INTELLECTUAL PROPERTY DEPT. 650 Kandatsu-machi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
東 宏行 (〒13 茨城県土浦市神立町６５０番地 日立建機株式会社土浦工場 知的財産部内 Ibaraki, 〒3000013, JP)
Application Number:
JP2011/060601
Publication Date:
November 10, 2011
Filing Date:
May 06, 2011
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY CO., LTD. (5-1 Kouraku 2-chome, Bunkyou-ku Tokyo, 04, 〒1120004, JP)
日立建機株式会社 (〒04 東京都文京区後楽二丁目５番１号 Tokyo, 〒1120004, JP)
SHIMAZU, Atsushi (LTD. TSUCHIURA WORKS INTELLECTUAL PROPERTY DEPT. 650 Kandatsu-machi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
島津 淳志 (〒13 茨城県土浦市神立町６５０番地 日立建機株式会社土浦工場 知的財産部内 Ibaraki, 〒3000013, JP)
AZUMA, Hiroyuki (LTD. TSUCHIURA WORKS INTELLECTUAL PROPERTY DEPT. 650 Kandatsu-machi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
日立建機株式会社 (〒04 東京都文京区後楽二丁目５番１号 Tokyo, 〒1120004, JP)
SHIMAZU, Atsushi (LTD. TSUCHIURA WORKS INTELLECTUAL PROPERTY DEPT. 650 Kandatsu-machi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
島津 淳志 (〒13 茨城県土浦市神立町６５０番地 日立建機株式会社土浦工場 知的財産部内 Ibaraki, 〒3000013, JP)
AZUMA, Hiroyuki (LTD. TSUCHIURA WORKS INTELLECTUAL PROPERTY DEPT. 650 Kandatsu-machi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
International Classes:
F15B11/16; E02F9/22
Attorney, Agent or Firm:
NAGAI, Fuyuki (Fukoku Seimei Building 2-2-2, Uchisaiwaicho, Chiyoda-k, Tokyo 11, 〒1000011, JP)
Claims: