Title:
HYDRAULIC DRIVE DEVICE
Document Type and Number:
Japanese Patent JP2017203526
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a hydraulic drive device capable of assisting a main pump by allowing a hydraulic motor to serve as a hydraulic pump during non-regeneration.SOLUTION: A hydraulic drive device according to an embodiment includes a hydraulic actuator, a control valve, a main pump, a pump motor, a regeneration line, and a changeover part. The pump motor has both of a pump operation function and a motor operation function. The regeneration line supplies return oil from the hydraulic actuator to an inlet port of the pump motor. The changeover part allows the pump motor to operate as a regeneration hydraulic motor in a first changeover state, and allows the pump motor to operate as a hydraulic pump in a second changeover state.SELECTED DRAWING: Figure 3
Inventors:
NISHITANI KEISUKE
Application Number:
JP2016096492A
Publication Date:
November 16, 2017
Filing Date:
May 12, 2016
Export Citation:
Assignee:
NABTESCO CORP
International Classes:
F15B21/14; E02F9/20; F15B11/02; F15B11/044
Attorney, Agent or Firm:
Sumio Tanai
Shingo Suzuki
Shu Oikawa
Field Saki Satoshi
Shingo Suzuki
Shu Oikawa
Field Saki Satoshi
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