Travel assembly

Details Travel assembly Travel assembly

2009-02-25

2011-11-22

Holmes, Justin (Department: 3655)

Planetary gear transmission systems or components

Electric or magnetic drive or control

Differential drive or control

C180S372000

Reexamination Certificate

active

08062160

ABSTRACT:
A travel assembly, for example, suited for arrangement on a vehicle such as a mining dump truck, is provided with a travel motor, a planetary speed reduction mechanism for transmitting rotation of the travel motor at a lower rotational speed, a spindle forming an axle, and a wheel supported on the spindle via a tapered roller bearing and rotatable by the planetary speed reduction mechanism. The planetary speed reduction mechanism includes a sun gear rotatable by rotation of a shaft of the travel motor, planet gears for rotating the wheel in response to rotation of the sun gear, stepped pins forming rotary shafts for the planet gears, a carrier for holding the stepped pins thereon, and bolts for fixedly securing the stepped pins on the carrier. The travel assembly is provided with a spline connection connecting the spindle and the carrier with each other and a limiting member for limiting movements of the bolts in a direction toward the tapered roller bearing.

REFERENCES:
patent: 2718381 (1955-09-01), Moon
patent: 4615231 (1986-10-01), Takahashi
patent: 7396308 (2008-07-01), Tabata et al.
patent: 7578763 (2009-08-01), Morita
patent: 2004/0065169 (2004-04-01), Ciszak et al.

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