Title:
HYDRAULIC DRIVE DEVICE
Document Type and Number:
Japanese Patent JP2019178722
Kind Code:
A
Abstract:
To provide a hydraulic drive device capable of recovering positional energy of an object in a space-saving manner.SOLUTION: A hydraulic drive device 1 comprises: an operation valve 12 arranged between a hydraulic pump 6 and tank 9 and a lift cylinder 2; an accumulator 23 connected to a hydraulic fluid passage 20 connecting a suction port 6a of the hydraulic pump 6 and the lift cylinder 2, for accumulating hydraulic fluid from the lift cylinder 2; a pressure accumulation flow control valve 24 disposed in the hydraulic oil flow passage 20, for controlling the flow rate of hydraulic oil supplied to the accumulator 23; and a bypass flow control valve 22 disposed in a hydraulic oil flow passage 21 connecting the hydraulic oil flow passage 20 and the tank 9, for controlling the flow rate of hydraulic oil discharged to the tank 9, where a connection branch point A between the bypass flow control valve 22 and the hydraulic oil flow passages 20 and 21 is arranged inside the operation valve 12.SELECTED DRAWING: Figure 1
Inventors:
SAJI TSUNESHIRO
UEDA SUKENORI
UEDA SUKENORI
Application Number:
JP2018067557A
Publication Date:
October 17, 2019
Filing Date:
March 30, 2018
Export Citation:
Assignee:
TOYOTA IND CORP
International Classes:
F15B21/14; B66F9/22; F15B11/00; F15B11/02
Domestic Patent References:
| JP2006112616A | 2006-04-27 | |||
| JP2013511013A | 2013-03-28 | |||
| JP2018132126A | 2018-08-23 | |||
| JPH05263806A | 1993-10-12 | |||
| JPH06123303A | 1994-05-06 |
Foreign References:
| US20170363115A1 | 2017-12-21 | |||
| US20170241445A1 | 2017-08-24 |
Attorney, Agent or Firm:
Yoshiki Hasegawa
Yoshiki Kuroki
Takashi Mikami
Hiromitsu Nakayama
Yoshiki Kuroki
Takashi Mikami
Hiromitsu Nakayama