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Patent Searching and Data


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.

Inventors:
UEDA Yuki (2-1 Toyoda-cho, Kariya-sh, Aichi 71, 〒4488671, JP)
SAJI Koshiro (2-1 Toyoda-cho, Kariya-sh, Aichi 71, 〒4488671, JP)
Application Number:
JP2017/037982
Publication Date:
May 24, 2018
Filing Date:
October 20, 2017
Export Citation:
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Assignee:
KABUSHIKI KAISHA TOYOTA JIDOSHOKKI (2-1 Toyoda-cho, kariya-shi Aichi, 71, 〒4488671, JP)
International Classes:
F15B21/14; B66F9/22; B66F9/24; F15B11/02; F15B11/044
Foreign References:
JP2013133196A2013-07-08
JP2010101365A2010-05-06
Attorney, Agent or Firm:
ITO Masaki (Inc. 4-15, Hirokoji, Kariya-sh, Aichi 44, 〒4480844, JP)
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