Title:
DAMPER FOR RAILWAY VEHICLES
Document Type and Number:
WIPO Patent Application WO/2013/015358
Kind Code:
A1
Abstract:
[Problem] To use a disk valve as a damping valve in a damper for railway vehicles whilst retaining reliability and durability. [Solution] A piston (13), which is linked to a piston rod (14) so as to communicate therewith, is inserted into a cylinder (12) in which oil has been sealed. An extension-side damping valve (25) that has a disk valve is provided to an extension-side passage (22), and a compression-side damping valve (26) that has a disk valve is provided to a compression-side passage (23). A poppet-type failure valve (27) is provided to a failure passage (24), and the flow path of the oil is switched by a failure switching valve (28) and a failure on-off valve (29). Generally, a current is applied to the failure switching valve (28) and the failure on-off valve (29), and damping force is generated by the extension-side damping valve (25) and the compression-side damping valve (26), each having a disk valve with excellent responsiveness, and the damping force is adjusted by a control current. In the event of a failure, electrification is stopped and the highly robust failure valve (27) ensures that a prescribed damping force is generated.
Inventors:
SHIBAHARA KAZUAKI (JP)
Application Number:
PCT/JP2012/068964
Publication Date:
January 31, 2013
Filing Date:
July 26, 2012
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
SHIBAHARA KAZUAKI (JP)
SHIBAHARA KAZUAKI (JP)
International Classes:
F16F9/50; B61F5/24; F16F15/02; F16F15/027
Foreign References:
| JP2011088623A | 2011-05-06 | |||
| JP2002013582A | 2002-01-18 | |||
| JP2006283837A | 2006-10-19 | |||
| JP2002054675A | 2002-02-20 | |||
| JP2002114144A | 2002-04-16 | |||
| JPH11132277A | 1999-05-18 | |||
| JPH07269627A | 1995-10-20 |
Attorney, Agent or Firm:
HANABUSA, Tsuneo (JP)
Sepal Tsuneo (JP)
Sepal Tsuneo (JP)
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Claims: