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Patent Searching and Data


Title:
HYDRAULIC DRIVE SYSTEM FOR CONSTRUCTION MACHINERY
Document Type and Number:
WIPO Patent Application WO/2016/098335
Kind Code:
A1
Abstract:
In the present invention, a hydraulic drive system for construction machinery is provided with: a first pump having a first rotational shaft and supplying hydraulic oil to a swing motor; a second pump having a second rotational shaft coupled to the first rotational shaft and supplying hydraulic oil to a boom cylinder; an engine having an output shaft coupled to the first rotational shaft or the second rotational shaft; a driven gear mounted onto the first rotational shaft and/or the second rotational shaft, between the first pump and the second pump; a driving gear engaged with the driven gear; a regenerative motor having a third rotational shaft for transmitting power to the driving gear; and a swinging regenerative switching valve for leading hydraulic oil discharged from the swing motor during swinging deceleration to the regenerative motor, and/or a boom regenerative switching valve for leading hydraulic oil discharged from the boom cylinder during boom lowering to the regenerative motor.

Inventors:
KONDO AKIHIRO
FUNASAKA ARATA
Application Number:
PCT/JP2015/006199
Publication Date:
June 23, 2016
Filing Date:
December 11, 2015
Export Citation:
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Assignee:
KAWASAKI HEAVY IND LTD (JP)
International Classes:
F15B21/14; E02F9/20; E02F9/22; F15B11/17
Foreign References:
JP2003049809A2003-02-21
JP2008232307A2008-10-02
Attorney, Agent or Firm:
PATENT CORPORATE BODY ARCO PATENT OFFICE (JP)
Patent business corporation Owner old patent firm (JP)
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