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Title:
WET BRAKE DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/046619
Kind Code:
A1
Abstract:
In a state alternately overlapping one another, multiple rotation-side brake plates (47) and multiple non-rotation-side brake plates (48) are arranged in a brake case (32) further outwards in the radial direction than a motor shaft (25). Of these rotation-side brake plates (47) and non-rotation-side brake plates (48), a friction material (48B) is provided only on the non-rotation-side brake plates (48). By this means, the disclosed wet brake device allows the rotation-side brake plates (47) to be lighter-weight and reduces drag resistance of the rotation-side brake plates (47) which rotate even when the brakes are released.

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Inventors:
YABUUCHI YOSHITOMO (JP)
NIIDOME TAKASHI (JP)
KOMARU YUTAKA (JP)
Application Number:
PCT/JP2011/072370
Publication Date:
April 12, 2012
Filing Date:
September 29, 2011
Export Citation:
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Assignee:
HITACHI CONSTRUCTION MACHINERY (JP)
YABUUCHI YOSHITOMO (JP)
NIIDOME TAKASHI (JP)
KOMARU YUTAKA (JP)
International Classes:
F16D55/40; F16D65/12; F16D69/00
Foreign References:
JP2006025580A2006-01-26
JP2000283191A2000-10-13
JP2006199144A2006-08-03
JP2008190634A2008-08-21
JP2002323072A2002-11-08
JP2006025580A2006-01-26
JP2007039990A2007-02-15
Other References:
See also references of EP 2626587A4
Attorney, Agent or Firm:
HIROSE KAZUHIKO (JP)
Kazuhiko Hirose (JP)
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Claims:



 
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