Patent ID: 6150740
Filing Date: 2000-11-21
Classification: F16C,H02K

Abstract:
A linear motion carriage-rail system having longitudinally extending opposing inner planar carriage and rail surfaces between which linear motion bearings are disposed to enable the carriage to move longitudinally over the rail, the system having, in combination, a linear electric motor having a forcer coil part and a longitudinally extending magnet track part; the forcer coil part being fixed to an intermediate region of said planar carriage inner surface to move the carriage longitudinally over the rail; and with the magnet track being fixed to and intermediately longitudinally along the inner planar surface of the rail but oriented at an acute angle to the plane of the rail surface, such that the attractive force between said motor parts approximately equally preloads the bearings as the carriage is moved over the rail, wherein the inner planar carriage surface is L-shaped to provide also an orthogonal surface parallel to and overlapping the adjacent side of the rail, and between which orthogonal surface and rail side, further linear motion bearings are interposed, and wherein the motor magnet track is disposed within a longitudinal intermediate trench along the inner plane rail surface, with the track in the trench angled at said acute angle.