Title:
WORK MACHINE
Document Type and Number:
WIPO Patent Application WO/2017/099063
Kind Code:
A1
Abstract:
Provided is a work machine in which it is possible to store surplus energy generated by another drive system, such as regenerative energy, in other than a power storage device in a form that allows retroactive use. Accordingly, this work machine includes: an electric motor that is electrically connected to another drive system that drives a prescribed actuator; a hydraulic pump that is mechanically connected to the electric motor and is driven by the electric motor; a hydraulic circuit through which hydraulic fluid discharged from the hydraulic pump flows; a hydraulic actuator that is connected to the hydraulic circuit and can receive a supply of hydraulic fluid; a pressure accumulator that is connected to the hydraulic circuit; and a control unit that controls the operation of the hydraulic circuit. When surplus electric power is supplied from the other drive system to the electric motor, the control unit controls the hydraulic circuit such that the hydraulic fluid discharged from the hydraulic pump is supplied to the pressure accumulator.
Inventors:
KAWASHIMA KOJI (JP)
Application Number:
PCT/JP2016/086197
Publication Date:
June 15, 2017
Filing Date:
December 06, 2016
Export Citation:
Assignee:
SUMITOMO HEAVY INDUSTRIES (JP)
International Classes:
E02F9/20; F15B21/14; H02J7/00; H02P9/04
Foreign References:
| JP2015021266A | 2015-02-02 | |||
| JP2007010006A | 2007-01-18 | |||
| JP2012158890A | 2012-08-23 | |||
| JP2014206252A | 2014-10-30 | |||
| JP2013148141A | 2013-08-01 | |||
| JP2001207482A | 2001-08-03 |
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
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