Strain wave gearing
AssigneeHarmonic Drive Systems Inc.
InventorMasaru KOBAYASHI
Life of this patent
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Abstract
An internal contact part of a wave generator of a strain wave gearing, a contact part between an externally toothed gear and the wave generator, and tooth surface parts are lubricated by a lubricating fine powder. When the strain wave gearing is in operation, the lubricating fine powder is supplied to the internal contact part and the contact part by a first powder guide that rotates integrally with the wave generator. Having passed through these sections, the lubricating fine powder is supplied to the tooth surface parts by a second powder guide that rotates integrally with the wave generator. Each component part can be reliably lubricated regardless of the orientation of the strain wave gearing during operation.
Claims8
A strain wave gearing comprising:
- a rigid internally toothed gear;
- a cup-shaped flexible externally toothed gear arranged coaxially inside the internally toothed gear;
- a wave generator for flexing the externally toothed gear in a non-circular shape to partially mesh with the internally toothed gear, the wave generator being accommodated inside the externally toothed gear;
- a lubricating powder filled in a compartment section enclosed by the externally toothed gear and the wave generator;
- a first powder guide for rotating integrally with the wave generator in the compartment section to lead the lubricating powder in a direction toward an internal contact part of the wave generator and a contact part between the wave generator and the externally toothed gear;
- and
- a second powder guide for rotating integrally with the wave generator to lead the lubricating powder after passed through the wave generator from the compartment section, toward a direction of tooth surface parts of the externally toothed gear and the internally toothed gear.
Dependencies are inferred from the claim text.