Title:
HYDRAULIC EXCAVATOR ATTACHMENT CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/099214
Kind Code:
A1
Abstract:
Disclosed is a hydraulic excavator attachment control device comprising a hydraulic circuit that is provided with a hydraulic pump (3); a plurality of actuators including the actuator for a breaker (110) which is an attachment; and a plurality of flow control valves including a flow control valve (B4) for the attachment, this flow control valve (B4) being switched by means of operating pilot pressure from an operating pedal device (7), and supplying discharged oil from the hydraulic pump (3) to the actuator for the attachment. When the operating pedal device (7) is operated, with an attachment mode not selected by an attachment selecting device (20), the action of the actuator for the attachment is restricted. Due to the above, if an operator forgets to switch from a normal mode to the attachment mode, resulting in the attachment being operated, it is possible to prevent the failure and life reduction of the attachment and other hydraulic devices.
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Inventors:
AZUMA Hiroyuki (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, 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)
NAKAMURA Tsuyoshi (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
中村 剛志 (〒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)
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)
NAKAMURA Tsuyoshi (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
中村 剛志 (〒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)
Application Number:
JP2010/071293
Publication Date:
August 18, 2011
Filing Date:
November 29, 2010
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY CO., LTD. (5-1 Koraku 2-chome, Bunkyo-ku Tokyo, 63, 〒1128563, JP)
日立建機株式会社 (〒63 東京都文京区後楽二丁目５番１号 Tokyo, 〒1128563, JP)
AZUMA Hiroyuki (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, 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)
NAKAMURA Tsuyoshi (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
日立建機株式会社 (〒63 東京都文京区後楽二丁目５番１号 Tokyo, 〒1128563, JP)
AZUMA Hiroyuki (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, 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)
NAKAMURA Tsuyoshi (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
International Classes:
E02F9/22; E02F9/24; F15B20/00
Attorney, Agent or Firm:
KASUGA Yuzuru (Torii-nihonbashi Bldg, 4-1 Nihonbashi-honcho 3-chome, Chuo-k, Tokyo 23, 〒1030023, JP)
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