Patent ID: 7624686
Filing Date: 2009-12-01
Classification: B60L

Abstract:
1. A bogie apparatus comprising: an upper inner permanent magnet which is in the form of a circular ring and mounted onto a bottom surface of a chassis; a bogie located below the chassis; a lower inner permanent magnet which is in the form of a circular ring and mounted onto an upper surface of the bogie, has inner and outer diameters identical with those of the upper inner permanent magnet respectively, and is aligned substantially with and spaced from the upper inner permanent magnet at a predetermined distance, in which magnetic poles of the lower and upper inner permanent magnets have the same polarity facing each other so that a levitating repulsive force is generated therebetween; an upper sleeve being mounted onto the chassis and coaxial with the upper inner permanent magnet; a lower sleeve being mounted onto the bogie and coaxial with the lower inner permanent magnet; a rotation shaft, one end of which is fitted into the upper sleeve so as to be rotatable and slidable in an axial direction thereof within the upper sleeve and the other end of which is fixed into the lower sleeve, wherein the chassis located above and the bogie located below are connected via the rotation shaft and can rotate relative to each other; and a position limit cover located at a top end of the upper sleeve and connected to the rotation shaft so as to prevent the rotation shaft from being drawn out of the upper sleeve.