Patent ID: 6218751
Filing Date: 2001-04-17
Classification: F16C,G01N

Abstract:
A magnetic bearing device for use in instruments and which allows a rotational movement of a first part relative to a second part and including at least one magnet unit at each of the parts, said magnet units creating magnetic fields, the forces of which stabilize the parts relative to each other including in directions radial to the axis of rotation of the first part,wherein the magnet unit or units (2) of the first, rotatable, part (4) is so localized and arranged relative to the magnet unit or units (1) of the second, stationary, part (3) that the interacting fields of force of the magnet units (1,2) of the two parts create both radially acting stabilizing force components and force components resulting in an axial displacement force biasing the first, rotatable, part (4) in the one axial direction relative to the second, stationary, part (3), and wherein at least one axially acting mechanical positioning means (5) is mounted to connect the first part with the second part, said positioning means counteracting the axial force component biasing the first rotatable part and being at least in one direction axially stable, at least partially rotatable connector,wherein the connector is a torsion means (5) secured to the first rotational part at and extending along the rotation axis thereof, said torsion means allowing at least limited rotation in either rotational direction and preventing displacement in at least the one axial direction caused by the axial repelling force component.