Wave gear device
AssigneeHarmonic Drive Systems Inc.
InventorsMasaru Kobayashi, Yuki Honda
Life of this patent
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Abstract
The interior space of a cup-shaped flexible externally toothed gear of a cup-type wave gear device is divided into a front interior space and a rear interior space by a partition mechanism. A lubricant is filled in the front interior space at the side of a wave generator, to which lubrication is required. The volume of the front interior space is set so that a necessary amount of lubricant is filled. Since the lubricant is not necessary to fill in the entire interior space of the flexible externally toothed gear, the amount of lubricant to be filled can be reduced.
Claims11
A wave gear device characterized in comprising:
- a rigid internally toothed gear;
- a flexible externally toothed gear having a cylindrical barrel part capable of deflecting to a non-circular shape, a diaphragm extending radially inwards or outwards from a rear opening end of the cylindrical barrel part, and a disc-shaped or ring-shaped boss formed on an inner peripheral edge or an outer peripheral edge of the diaphragm;
- a wave generator mounted on an inside of an external teeth formation portion on a side towards a front opening end of the cylindrical barrel part, the wave generator deflecting the cylindrical barrel part to a non-circular shape so that the flexible externally toothed gear is partially engaged with the rigid internally toothed gear, and the wave generator moving positions of engagement between the two gears in a circumferential direction;
- and
- a partition mechanism, which rotates integrally with the flexible externally toothed gear, and partitions an interior space in the cylindrical barrel part into a front interior space on a side towards the wave generator and a rear interior space on a side towards the diaphragm.
Dependencies are inferred from the claim text.