DRIVE DEVICE FOR HYDRAULIC CYLINDER IN WORK MACHINE

Title:

DRIVE DEVICE FOR HYDRAULIC CYLINDER IN WORK MACHINE

Document Type and Number:

WIPO Patent Application WO/2020/158390

Kind Code:

A1

Abstract:

Provided is a drive device with which it is possible to effectively avoid an impact at the stroke end of a hydraulic cylinder. The drive device is provided with: hydraulic pumps (31, 32); cylinder control valves (37, 38); an operating member (47a); drive command input units (34, 47b) for inputting a cylinder drive command corresponding to a cylinder operation given to the operation member (47a) to the cylinder control valves (37, 38); cylinder stroke detection units (50, 70); and drive command limit units (42A, 42B, 50) for limiting the cylinder drive command in accordance with a cylinder stroke so that a piston (27p) of a hydraulic cylinder (27) is stopped before the stroke end.

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Inventors:

UEDA KOJI

Application Number:

PCT/JP2020/001063

Publication Date:

August 06, 2020

Filing Date:

January 15, 2020

Export Citation:

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Assignee:

KOBELCO CONSTR MACH CO LTD (JP)

International Classes:

F15B11/00; E02F9/22; F15B11/02

Foreign References:

JP2000145717A	2000-05-26
JPH08200304A	1996-08-06
JPH11270514A	1999-10-05
JPH1088623A	1998-04-07
JP2017053413A	2017-03-16
JP2007046732A	2007-02-22
JP2016169796A	2016-09-23
JPH05195552A	1993-08-03
JPH1181391A	1999-03-26
JP2010261521A	2010-11-18
JP2007046732A	2007-02-22

Other References: