Driving unit that comprises a hydraulic motor and a reduction gear
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Feb 25, 2003
Grant Date -
Mar 21, 2002
app pub date -
Aug 29, 2001
filing date -
Aug 29, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a driving unit comprising a multiple-stage planetary gear type reducer used to reduce rotation speed of a hydraulic motor and output the reduced rotation speed, which is used as a driving device for a traveling apparatus. The driving unit of the present invention is so structured that a trunnion boss for rotatably supporting a planetary gear train of a final state is supported at opposite ends thereof. This structure enables the load applied to the trunnion boss to be dispersed to the both ends, and as such can allow the trannion boss to be reduced in diameter or can allow the fixed casing to be reduced in circumferential dimension. This can produce a downsized driving unit. The present invention has additional features, such as the feature that an output shaft of the hydraulic motor and an input shaft of the reducer are formed in the form of a single rotating shaft. This can provide a driving unit structurally optimized for every principal part, to provide downsizing and improved durability.
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