Title:
HYDRAULIC DRIVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/181934
Kind Code:
A1
Abstract:
In order to suppress the occurrence of a peak pressure inside a motor case (M) without compromising the cooling effect of a hydraulic motor (12), a hydraulic drive device includes, the hydraulic motor (12) which is operated by an oil being circulated through a main oil path (13A) and a main oil path (13B) which are connected to the motor case (M), a low-pressure selection valve (31) which is operated depending on a differential pressure between the main oil path (13A) and the main oil path (13B) so as to discharge the oil in the main oil path (13B) into the motor case (M), and a tank oil path (33) connecting the inside of the motor case (M) to an oil tank (T), wherein a choke aperture (100) by annular gap flow is interposed in the low-pressure selection valve (31).
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| JPS57208348 | HYDRAULIC DRIVING CIRCUIT |
Inventors:
MIYATA TAKUYA (JP)
NAITOU SHINOBU (JP)
NAITOU SHINOBU (JP)
Application Number:
PCT/JP2014/064339
Publication Date:
December 03, 2015
Filing Date:
May 29, 2014
Export Citation:
Assignee:
KOMATSU MFG CO LTD (JP)
International Classes:
F16H61/4104; F03C1/26; F04B23/04
Foreign References:
| JP2004347083A | 2004-12-09 | |||
| JP2002521625A | 2002-07-16 | |||
| JP2008101636A | 2008-05-01 | |||
| JPS62170402U | 1987-10-29 | |||
| JP2005121158A | 2005-05-12 |
Attorney, Agent or Firm:
SAKAI, HIROAKI (JP)
Hiroaki Sakai (JP)
Hiroaki Sakai (JP)
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