Title:
SWING DEVICE FOR CONSTRUCTION MACHINE
Document Type and Number:
WIPO Patent Application WO/2012/002175
Kind Code:
A1
Abstract:
A speed reducer (12) is installed on top of a swing frame (3A). An electric motor (22) having an electric motor shaft (27) is disposed on the upper side of the speed reducer (12). A hydraulic motor (34) having a hydraulic motor shaft (41) is disposed on the upper side of the electric motor (22). A shaft insertion hole (23E) wherethrough the upper end of the electric motor shaft (27) is inserted is provided in a cover section (23B) of an electric motor casing (23). A male spline section (41A) provided at the lower end of the hydraulic motor shaft (41) is fitted into a female spline section (27B) provided at the upper end of the electric motor shaft (27). A bearing (28) is provided between the shaft insertion hole (23E) and the electric motor shaft (27). Furthermore, a pressure seal (43) is provided at a position above the bearing (28). Due to the above, the spline fitting portion between the female spline section (27B) and the male spline section (41A) is lubricated at all times by making use of the oil which leaks from the hydraulic motor (34).
Inventors:
UZAWA NOBUO (JP)
OJIMA MITSUGU (JP)
ISHIKAWA KOUJI (JP)
SATAKE HIDETOSHI (JP)
OJIMA MITSUGU (JP)
ISHIKAWA KOUJI (JP)
SATAKE HIDETOSHI (JP)
Application Number:
PCT/JP2011/063919
Publication Date:
January 05, 2012
Filing Date:
June 17, 2011
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY (JP)
UZAWA NOBUO (JP)
OJIMA MITSUGU (JP)
ISHIKAWA KOUJI (JP)
SATAKE HIDETOSHI (JP)
UZAWA NOBUO (JP)
OJIMA MITSUGU (JP)
ISHIKAWA KOUJI (JP)
SATAKE HIDETOSHI (JP)
International Classes:
E02F9/12; E02F9/20
Foreign References:
| JP2008297754A | 2008-12-11 | |||
| JP2008169621A | 2008-07-24 | |||
| JP2009209725A | 2009-09-17 | |||
| JP2008297754A | 2008-12-11 |
Other References:
See also references of EP 2589707A4
Attorney, Agent or Firm:
HIROSE KAZUHIKO (JP)
Kazuhiko Hirose (JP)
Kazuhiko Hirose (JP)
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Claims: