Title:
HYDRAULIC CYLINDER DRIVE DEVICE FOR WORK MACHINE
Document Type and Number:
Japanese Patent JP2020118271
Kind Code:
A
Abstract:
To provide a drive device that can effectively avoid a shock at stroke end of a hydraulic cylinder.SOLUTION: A drive device includes: hydraulic pumps 31, 32; cylinder control valves 37, 38; an operation member 47a; drive command input units 34, 47b for inputting a cylinder drive command corresponding to a cylinder operation provided to the operation member 47a into the cylinder control valves 37, 38; cylinder stroke detection units 50, 70; and drive command restriction units 42A, 42B, 50 restricting the cylinder drive command in accordance with cylinder stroke so as to stop a piston 27p of a hydraulic cylinder 27 short of stroke end.SELECTED DRAWING: Figure 2
Inventors:
UEDA KOJI
Application Number:
JP2019011950A
Publication Date:
August 06, 2020
Filing Date:
January 28, 2019
Export Citation:
Assignee:
KOBELCO CONTSTRUCTION MACHINERY LTD
International Classes:
F15B11/00; E02F9/22; F15B11/02
Domestic Patent References:
| JP2000145717A | 2000-05-26 | |||
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Foreign References:
| US4896582A | 1990-01-30 | |||
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Attorney, Agent or Firm:
Etsushi Kotani
Masataka Otani
Muramatsu Toshiro
Masataka Otani
Muramatsu Toshiro