Machine element or mechanism – Gearing – Gear and rotary bodies
Reexamination Certificate
2004-04-05
2010-11-16
Ridley, Richard W L (Department: 3656)
Machine element or mechanism
Gearing
Gear and rotary bodies
C074S409000, C074S440000, C212S247000
Reexamination Certificate
active
07832301
ABSTRACT:
A swing mechanism for a construction machine is provided with a center frame3having a pinion insertion hole3c, an inner race having an internal gear and mounted on a side of an undercarriage, an outer race1brotatably arranged surrounding the inner race and provided with the center frame secured thereon by bolts8a, a pinion maintained in meshing engagement with the internal gear of the inner race, and a pinion drive device. A pin fit-in hole3darranged in the center frame3such that a knock pin6fixed on the outer race1bis fitted in the pin fit-in hole to position the center frame3. To arrange the pin fit-in hole3din the center frame3, a pin fit-in hole portion20through which the pin fit-in hole3dis formed is locally arranged such that the pin fit-in hole portion20extends toward the pinion insertion hole3cto have a center of the pin fit-in hole3dlocated on a center connection line S. This construction allows to perform smooth assembly of the pinion drive device while enabling to optimally arrange the knock pin for positioning the center frame.
REFERENCES:
patent: 3972378 (1976-08-01), Houriez et al.
patent: 6035736 (2000-03-01), Gyllner et al.
patent: 09268600 (1997-10-01), None
patent: 2000-336696 (2000-12-01), None
patent: 2000336696 (2000-12-01), None
Isobe Hiroyuki
Nozue Akiyasu
Tanaka Nozomu
Crowell & Moring LLP
Diaz Thomas
Hitachi Construction Machinery Co. Ltd.
Ridley Richard W L
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