Title:
ARM FOR CONSTRUCTION MACHINERY
Document Type and Number:
WIPO Patent Application WO/2012/157676
Kind Code:
A1
Abstract:
An arm (11) for a hydraulic excavator (1) is formed as a box-type structure surrounded by left and right side plates (12, 13), a top plate (14), a bottom plate (15), and a thick rear plate (16). An upper end (16A) of the thick rear plate (16) is caused to protrude further upwards than an outside surface (14A3) of the top plate (14). An upper end (22B) of a pair of arm cylinder brackets (22) joined to an outside surface (16C) of the thick rear plate (16) is arranged higher than the outside surface (14A3) of the rear thick top plate (14A) and lower than the upper end (16A) of the thick rear plate (16). As a result, each arm cylinder bracket (22) can secure a large bonding surface area with the thick rear plate (16) and increase bonding strength.
Inventors:
SUGAYA MAKOTO (JP)
TAKAHASHI TAKESHI (JP)
SHIMODAIRA TAKAYUKI (JP)
TAKAHASHI TAKESHI (JP)
SHIMODAIRA TAKAYUKI (JP)
Application Number:
PCT/JP2012/062515
Publication Date:
November 22, 2012
Filing Date:
May 16, 2012
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY (JP)
SUGAYA MAKOTO (JP)
TAKAHASHI TAKESHI (JP)
SHIMODAIRA TAKAYUKI (JP)
SUGAYA MAKOTO (JP)
TAKAHASHI TAKESHI (JP)
SHIMODAIRA TAKAYUKI (JP)
International Classes:
E02F3/38
Foreign References:
| JP2005213819A | 2005-08-11 | |||
| JP2005029984A | 2005-02-03 | |||
| JPS5992166A | 1984-05-28 | |||
| JP2003261956A | 2003-09-19 |
Other References:
See also references of EP 2711467A4
Attorney, Agent or Firm:
HIROSE KAZUHIKO (JP)
Kazuhiko Hirose (JP)
Kazuhiko Hirose (JP)
Download PDF:
Claims:
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