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.
More Like This:
| JP6925956 | Work machine hydraulic system |
| JPS5616736 | HYDRAULIC CIRCUIT FOR HYDRAULIC POWER SHOVEL |
| WO/2024/019434 | CONSTRUCTION MACHINE |
Inventors:
AZUMA HIROYUKI (JP)
NAKAMURA TSUYOSHI (JP)
OKANO YASUO (JP)
ISHIKAWA KOUJI (JP)
NAKAMURA TSUYOSHI (JP)
OKANO YASUO (JP)
ISHIKAWA KOUJI (JP)
Application Number:
PCT/JP2010/071293
Publication Date:
August 18, 2011
Filing Date:
November 29, 2010
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY (JP)
AZUMA HIROYUKI (JP)
NAKAMURA TSUYOSHI (JP)
OKANO YASUO (JP)
ISHIKAWA KOUJI (JP)
AZUMA HIROYUKI (JP)
NAKAMURA TSUYOSHI (JP)
OKANO YASUO (JP)
ISHIKAWA KOUJI (JP)
International Classes:
E02F9/22; E02F9/24; F15B20/00
Foreign References:
| JP2005351442A | 2005-12-22 | |||
| JPH045343A | 1992-01-09 |
Attorney, Agent or Firm:
KASUGA Yuzuru (JP)
Kasuga 讓 (JP)
Kasuga 讓 (JP)
Download PDF:
Claims: