Wheeled platform

摘要

The rectangular roller plate (1) has four diagonally opposite rollers (2,2') fixed to it.. At the fixture points for the rollers, the roller plate has diagonal struts (5,5')as triangular support. The diagonal struts in the corners of the roller plate each join stays (10). Two spaced apart fixed rollers and two steering rollers are fixed to the roller plate by means of bearings (15).