The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 25, 2003
Filed:
Aug. 29, 2001
Masahiro Tsunemi, Kobe, JP;
Hidekazu Okufuji, Kobe, JP;
Nabco Ltd., Hyogo, JP;
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.