Title:
油圧式作業機械の蓄圧装置
Document Type and Number:
Japanese Patent JP6670167
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To quickly determine malfunction of an accumulator switch valve with a simple constitution in a pressure accumulation device of a hydraulic working machine.SOLUTION: A pressure accumulation device 6 includes an accumulator 28 connected to an oil passage 20, an accumulator switching valve 30 disposed between the oil passage 20 and the accumulator 28, and capable of switching a permission position 33 and a limit position 34, an accumulator switching command portion for commanding a switching operation to the accumulator switching valve 30, an accumulator pressure detector 38, an oil passage pressure detector 37, and an abnormality determination portion. The abnormality determination portion determines presence or absence of abnormality in operation of the accumulator switching valve on the basis of contents of the instruction to the accumulator switching valve 30 and a following degree of the accumulator pressure to the oil passage pressure.SELECTED DRAWING: Figure 1
Inventors:
Naoto Hori
Hitoshi Sakurai
Hitoshi Sakurai
Application Number:
JP2016096088A
Publication Date:
March 18, 2020
Filing Date:
May 12, 2016
Export Citation:
Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO
Kobelco Construction Machinery Co., Ltd.
Kobelco Construction Machinery Co., Ltd.
International Classes:
F15B20/00; B66C13/20; F15B11/02
Domestic Patent References:
| JP2016008695A | ||||
| JP2005530097A | ||||
| JP63275876A | ||||
| JP2006118762A | ||||
| JP6300013A | ||||
| JP11271170A | ||||
| JP2006118642A |
Attorney, Agent or Firm:
Etsushi Kotani
Masataka Otani
Muramatsu Toshiro
Masataka Otani
Muramatsu Toshiro