Title:
HYDRAULIC DRIVE DEVICE FOR CARGO VEHICLE
Document Type and Number:
WIPO Patent Application WO/2018/092509
Kind Code:
A1
Abstract:
According to the present invention, when pressure can be accumulated at an accumulator, a hydraulic fluid that is discharged from a raising/lowering lift cylinder can cause pressure to accumulate at the accumulator via a pressure accumulation flow control valve. As a result, the potential energy of a load can be accumulated at the accumulator as pressure and used at a different time. When pressure cannot be accumulated at the accumulator, the hydraulic fluid that is discharged from the raising/lowering lift cylinder can be supplied to a tank via a bypass flow control valve. As a result, fluctuations in the flow of the hydraulic fluid that is discharged from the raising/lowering lift cylinder can be suppressed, and the lift cylinder can be made to perform lowering at a desired lowering speed.
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Inventors:
UEDA YUKI (JP)
SAJI KOSHIRO (JP)
SAJI KOSHIRO (JP)
Application Number:
PCT/JP2017/037982
Publication Date:
May 24, 2018
Filing Date:
October 20, 2017
Export Citation:
Assignee:
TOYOTA JIDOSHOKKI KK (JP)
International Classes:
F15B21/14; B66F9/22; B66F9/24; F15B11/02; F15B11/044
Foreign References:
JP2013133196A | 2013-07-08 | |||
JP2010101365A | 2010-05-06 |
Attorney, Agent or Firm:
ITO Masaki (JP)
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