Title:
EXCAVATOR
Document Type and Number:
WIPO Patent Application WO/2021/025172
Kind Code:
A1
Abstract:
Provided is an excavator in which unintended operation of an actuator by an operator is prevented. An excavator according to the present invention comprises: a control valve that controls, on the basis of pilot pressure, the supply of hydraulic fluid of an actuator; an electric operation device that outputs an operation signal; a gate lock device; a gate lock valve that is provided on a pilot line that supplies pilot pressure to the control valve, and opens and closes according to the state of the gate lock device to switch between a locked state and an unlocked state; a proportional valve provided in the pilot line; and a controller into which the operation signal is inputted, and which controls the proportional valve. The controller assesses an operation as being erroneous when the gate lock valve is in the locked state by the gate lock device and the electric operation device is operated.
Inventors:
MISAKI YOUJI (JP)
Application Number:
PCT/JP2020/030525
Publication Date:
February 11, 2021
Filing Date:
August 07, 2020
Export Citation:
Assignee:
SUMITOMO CONSTRUCTION MACHINERY CO LTD (JP)
International Classes:
E02F9/20; E02F9/24
Domestic Patent References:
| WO2017141500A1 | 2017-08-24 | |||
| WO2013179517A1 | 2013-12-05 |
Foreign References:
| JP2011132795A | 2011-07-07 | |||
| JP2018204252A | 2018-12-27 | |||
| JP2019044333A | 2019-03-22 | |||
| JP2019146179A | 2019-08-29 |
Other References:
See also references of EP 4012111A4
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
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