Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
HYDRAULIC DRIVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/248681
Kind Code:
A1
Abstract:
This hydraulic drive device distributes a working fluid to each of a head-side port and a rod-side port to drive a hydraulic cylinder, the device comprising: a hydraulic pump motor which discharges a working fluid and is rotationally driven by the supplied working fluid; a motor connected to the hydraulic pump motor; a direction control valve which switches the direction of the working fluid flowing between the hydraulic pump motor and the head-side port; a regeneration valve which opens/closes a regeneration path that connects the head-side port and the rod-side port; a temperature sensor which detects the coil temperature of the motor; and a control device which controls the operation of each of the direction control valve and the regeneration valve, wherein the control device controls the opening degree of the regeneration valve according to the coil temperature detected by the temperature sensor when the regeneration path is opened by the regeneration valve and the head-side port and the hydraulic pump motor are connected by the direction control valve.

Inventors:
MURAOKA HIDEYASU
KINOSHITA NOBUYUKI
YUDATE YOJI
HATA YOSHIHIKO
KUWABARA YUKI
MIYAGI YUICHI
Application Number:
PCT/JP2023/019118
Publication Date:
December 28, 2023
Filing Date:
May 23, 2023
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
KAWASAKI HEAVY IND LTD (JP)
International Classes:
F15B11/024; F15B11/00; F15B21/14
Domestic Patent References:
WO2014109131A12014-07-17
WO2013005809A12013-01-10
Foreign References:
JP2011149473A2011-08-04
JP2008157407A2008-07-10
JP2013068011A2013-04-18
JP2021071170A2021-05-06
JP2015520347A2015-07-16
JP2021181789A2021-11-25
JP2016183535A2016-10-20
JP2013515883A2013-05-09
CN103299001A2013-09-11
Attorney, Agent or Firm:
ISHIDA, Shoji (JP)
Download PDF:
View/Download PDF      PDF Help



 
Previous Patent: HYDRAULIC DRIVE DEVICE

Next Patent: HYDRAULIC DRIVING DEVICE