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Patent Searching and Data


Title:
ROTARY WORK MACHINE
Document Type and Number:
WIPO Patent Application WO/2012/160770
Kind Code:
A1
Abstract:
This rotary work machine includes: a rotary motor (11) which is a hydraulic motor for rotary drive; a variable-capacity hydraulic pump (10); a rotary operation device (12) including an operation member (12a); a control valve (13) that controls the rotary motor (11) on the basis of an operation signal of the rotary operation device; a pump regulator (25); a relief valve (27) that releases excess oil to a tank (T); operation detectors (28, 29) that detect the operation direction and operation amount of the operation member (12a); a motor rotation speed detector (30); and a controller (26) that controls the discharge flow rate of the hydraulic pump (10). The controller (26) finds the deviation between the target rotation speed of the rotary motor (11) found from the rotary operation amount and the actual rotation speed detected by the motor rotation speed detector (30), and controls the discharge flow rate in a manner so as to bring the deviation closer to zero.

Inventors:
YAMASHITA KOJI
KOMIYAMA MASAYUKI
KOIWAI KAZUSHIGE
UEDA KOJI
MAEDA KENGO
Application Number:
PCT/JP2012/003095
Publication Date:
November 29, 2012
Filing Date:
May 11, 2012
Export Citation:
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Assignee:
KOBELCO CONSTR MACH CO LTD (JP)
KOBE STEEL LTD (JP)
YAMASHITA KOJI
KOMIYAMA MASAYUKI
KOIWAI KAZUSHIGE
UEDA KOJI
MAEDA KENGO
International Classes:
F15B11/00; E02F9/22
Foreign References:
JP3582679B22004-10-27
JPH0745748B21995-05-17
JP3352837B22002-12-03
JP2012127154A2012-07-05
JP2004225867A2004-08-12
Other References:
See also references of EP 2716919A4
Attorney, Agent or Firm:
KOTANI, Etsuji et al. (JP)
Etsuji Kotani (JP)
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Claims: