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Title:
FLUID PRESSURE CYLINDER
Document Type and Number:
Japanese Patent JP2014077513
Kind Code:
A
Abstract:

To inhibit variations in cushion characteristics and secure the strength of a cushion bearing in a fluid pressure cylinder.

In a fluid pressure cylinder 1, a piston rod 30 inserted into a cylinder tube 10 is decelerated by a cushion pressure occurring near a stroke edge. The fluid pressure cylinder 1 includes: a cylindrical cushion bearing 60 which is provided at the piston rod 30, enters into the inner side of a cushion cylindrical surface 45 near the stroke edge, and narrows down flow of a working fluid; and a taper groove 62 which opens on an outer peripheral surface 61 of the cushion bearing 60 and inclines relative to a center axis O of the cushion bearing 60. A shape of a cross section of the taper groove 62, which is perpendicular to its longitudinal direction, is formed into an arc shape.


Inventors:
Hara, Takahiko
Funato, Yasushi
Application Number:
JP2012000226143
Publication Date:
May 01, 2014
Filing Date:
October 11, 2012
Export Citation:
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Assignee:
KAYABA IND CO LTD
International Classes:
F15B15/22
Domestic Patent References:
JPS5787804U1982-05-31
JPS5292437U1977-07-11
JP2000073391A2000-03-07
JP2000087918A2000-03-28
JP2006153141A2006-06-15
JPH0861311A1996-03-08
JPS5292437U1977-07-11
JPS5787804U1982-05-31
Attorney, Agent or Firm:
後藤 政喜
飯田 雅昭
須藤 淳