Method for lubricating wave reduction gear, and rotating table device

摘要

A wave reduction gear ( 5 ) is disposed inside a device case ( 2 ) of a rotating table device ( 1 ). Lubrication oil is sprayed from an oil supply channel ( 22 ), which is formed in the device case ( 2 ), toward an oil supply hole ( 22 ) formed in a cup-shaped flexible externally toothed gear ( 12 ). A wave bearing ( 19 ) disposed in the interior is lubricated via the oil supply hole ( 21 ). Lubricating oil that has entered into the flexible externally toothed gear ( 12 ) is forcibly suctioned to the exterior via an oil recovery channel ( 23 ) that is formed in the device case ( 2 ). Accordingly, it will be possible to prevent oil from being suctioned due to the negative pressure state in the interior of the flexible externally toothed gear accompanying the high-speed rotation, and regions of the wave bearing ( 19 ) can be reliably lubricated.