Title:
HYDRAULIC DRIVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/061165
Kind Code:
A1
Abstract:
Provided is a hydraulic drive device that effectively uses pressurized oil stored in an accumulator to achieve a significant improvement in efficiency for an entire work machine. This hydraulic drive device is equipped with: a first hydraulic pump; a first hydraulic actuator that is driven when pressurized oil supplied from the first hydraulic pump is received; a first pipeline that supplies the pressurized oil from the first hydraulic pump to the first hydraulic actuator; a first pump flow volume adjustment device that is arranged in the first pipeline and adjusts the flow of the pressurized oil from the first hydraulic pump to the first hydraulic actuator; a first pressure accumulation device that stores the pressurized oil discharged from the first hydraulic pump; and a first accumulated pressure flow volume adjustment device that adjusts the flow of the pressurized oil from the first hydraulic pump to the first pressure accumulation device. The hydraulic drive device is further equipped with a first accumulated pressure flow volume supply device that supplies the pressurized oil stored in the first pressure accumulation device to the first hydraulic actuator via a second pipeline separate from the first pipeline.
Inventors:
HIJIKATA SEIJI (JP)
TSURUGA YASUTAKA (JP)
HIRAKU KENJI (JP)
ISHIKAWA KOUJI (JP)
TSURUGA YASUTAKA (JP)
HIRAKU KENJI (JP)
ISHIKAWA KOUJI (JP)
Application Number:
PCT/JP2016/078949
Publication Date:
April 05, 2018
Filing Date:
September 29, 2016
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
F15B21/14
Foreign References:
| JP2014206253A | 2014-10-30 | |||
| JPH06159312A | 1994-06-07 | |||
| JP2010025200A | 2010-02-04 | |||
| JP2009275773A | 2009-11-26 |
Other References:
See also references of EP 3521638A4
Attorney, Agent or Firm:
KAICHI IP (JP)
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