ECCENTRIC SLEWING DRIVE DEVICE AND VACUUM PUMP

摘要

PROBLEM TO BE SOLVED: To provide an eccentric slewing drive device capable of sufficiently cooling a motor unit and a drive unit by a simple configuration.;SOLUTION: The eccentric slewing drive device includes a casing 2, a structurally airtight can 5 provided in the casing 2, and a stator 4 arranged in a stator space 4A isolated by the can 5 in the casing 2. A cylindrical rotary shaft 9, which has a rotator 10 corresponding to the stator 4 and rotatably supported on a predetermined rotation axis O, and a pivot shaft 9a, which is arranged in such a manner as to be eccentric with respect to the rotation axis in the rotary shaft 9 and rotatably supported on a rotation axis parallel to the rotation axis, are provided in the can 5. In the casing 2, a first vent hole 11 communicating with the stator space 4A and used to introduce air outside the casing 2 into the stator space 4A is provided, and a fan 13 for supplying the air to the first vent hole 11 is provided.;COPYRIGHT: (C)2013,JPO&INPIT