Title:
HYDRAULIC DRIVING DEVICE OF WORK MACHINE AND AIR CONDITIONING DEVICE
Document Type and Number:
Japanese Patent JP2017106539
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a work machine dispensing with a rotary joint which can use electric power of a strong electricity system when an engine is stopped.SOLUTION: A hydraulic driving device of a work machine includes: a hydraulic pump 12 for upper air-conditioning, provided in a slewing upper structure; a hydraulic pump 11 for jack-up, provided in the slewing upper structure; a hydraulic motor 14 for air conditioning driven by discharged oil from the hydraulic pump 12 for upper air-conditioning and provided in the slewing upper structure; a jack-up cylinder 40 provided in an undercarriage and driven by discharged oil from the hydraulic pump 11 for jack-up; an electric motor 32 driven by an external power source and provided in the undercarriage; a hydraulic pump 33 for lower air-conditioning, provided in the undercarriage and driven by the electric motor 32; and a rotary joint 26. A pipe conduit is formed in the rotary joint 26, for guiding the discharged oil from the hydraulic pump 11 for jack-up provided in the slewing upper structure to the jack-up cylinder 40, and supplying the discharged oil from the hydraulic pump 33 for lower air conditioning to the hydraulic motor 14 for air conditioning.SELECTED DRAWING: Figure 3
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Inventors:
FUNATO KOJI
Application Number:
JP2015240414A
Publication Date:
June 15, 2017
Filing Date:
December 09, 2015
Export Citation:
Assignee:
HITACHI SUMITOMO HEAVY IND CONSTRUCTION CRANE CO LTD
International Classes:
F15B11/17; B66C13/52; B66C23/40; F15B20/00
Domestic Patent References:
| JP2013220667A | 2013-10-28 | |||
| JP2014046706A | 2014-03-17 | |||
| JP2014046997A | 2014-03-17 | |||
| JP2009281077A | 2009-12-03 | |||
| JP2006335221A | 2006-12-14 | |||
| JP2000289983A | 2000-10-17 |
Foreign References:
| US20150048188A1 | 2015-02-19 |
Attorney, Agent or Firm:
Patent Business Corporation Takewa International Patent Office