Hollow strain wave gearing and hollow actuator
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United States of America Patent
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Sep 26, 2017
Grant Date -
Feb 23, 2017
app pub date -
May 16, 2014
filing date -
May 16, 2014
priority date (Note) -
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Abstract
A cup-type hollow strain wave gearing of a hollow actuator has a seal part assembled inside a cup-shaped externally toothed gear. The seal part seals between a boss of the externally toothed gear and a plug of the wave generator so as to prevent lubricant from leaking from the side of the externally toothed gear into a hollow part. Since the seal part employs an oil seal and an O-ring, it is able to be constituted inexpensively and to surely prevent leakage of low-viscosity lubricant.
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