Patent ID: 7871254
Filing Date: 2011-01-18
Classification: F01C,F04C,F16C,H02K,Y10T

Abstract:
1. A magnetic bearing and coupling device comprising: a drive shaft coaxial with a follower shaft; an inner rotary permanent magnet having polarity in a radial direction, the inner permanent magnet being fixed to an outer circumference of a first end of either one of the driving shaft or the follower shaft to rotatably support the first end; a cylindrical coupling fixed to a second end of the other one of the driving shaft or the follower shaft; an outer rotary permanent magnet fixed to an inner circumference of the cylindrical coupling, opposite poles facing each other between the outer rotary permanent magnet and the inner rotary permanent magnet to allow rotation of the driving shaft to be transmitted to the follower shaft without contact by magnetic attractive force owing to the opposite poles between the outer rotary permanent magnet and the inner rotary permanent magnet; an annular support fixed in a housing; and a fixed permanent magnet fixed in the annular support to allow the driving shaft or the follower shaft to be rotatably supported around the inner rotary permanent magnet, like poles facing each other between the inner rotary permanent magnet and the fixed permanent magnet to allow the driving shaft or the follower shaft to be rotatably supported without contact to the housing by repulsive force owing to the like poles between the inner rotary permanent magnet and the fixed permanent magnet.