Title:
HYDRAULIC APPARATUS AND PRESS DEVICE
Document Type and Number:
Japanese Patent JP2020172957
Kind Code:
A
Abstract:
To provide a hydraulic apparatus capable of improving responsiveness and stability in high-speed descending of an actuator, and capable of performing stable counter pressure control in pressurizing and descending.SOLUTION: A hydraulic apparatus includes: an actuator (100); a first hydraulic pump (P1); a first motor (M1) for driving the first hydraulic pump (P1); a throttle valve (10); a relief valve (20); a second hydraulic pump (P2); a second motor (M2) for driving the second hydraulic pump (P2); a switching section (30) for switching whether to control an opening of the throttle valve (10) in accordance with a pressure of working fluid supplied from the second hydraulic pump (P2) or to control the relief valve (20) in accordance with the pressure of the working fluid supplied from the second hydraulic pump (P2); and a control device (90) for controlling the first motor (M1), the second motor (M2), and the switching section (30).SELECTED DRAWING: Figure 1
Inventors:
KAMIBAYASHI ATSUHIRO
NAKAMURA HIROICHI
NAKAMURA HIROICHI
Application Number:
JP2019074146A
Publication Date:
October 22, 2020
Filing Date:
April 09, 2019
Export Citation:
Assignee:
DAIKIN IND LTD
International Classes:
F15B11/028; B30B1/32; F15B11/02; F15B11/044
Attorney, Agent or Firm:
Takuji Yamada
Etsuko Isoe
Toshiyuki Yamazaki
Etsuko Isoe
Toshiyuki Yamazaki