The invention discloses a carbon-free trolley capable of moving in an 8 shape. The carbon-free trolley comprises a frame, and a gravity mechanism, a driving transmission mechanism, a
cam mechanism and a steering mechanism which are arranged on the rack, wherein the gravity mechanism comprises a vertical
barrel, a duplex wheel, a flexible
wire rope, a
potential energy block and a wire winding shaft; the driving transmission mechanism comprises a driving gear, a driven gear, a right rear wheel shaft, a right rear wheel, a left rear wheel shaft and a left rear wheel; the
cam mechanism comprises a
cam and a push rod
assembly; the steering mechanism comprises a linear spring, a first swing angle adjusting device, a first
micrometer head, a swing angle sliding groove, a second swing angle adjusting device, a swing angle sliding block, a second
micrometer head and a front wheel. The carbon-free trolley is provided with a primary transmission gear with the
transmission ratio of 1 to 3.76, is simple and compact in structure and low in manufacturing cost; the duplex wheel is used for converting, the
utilization rate of
gravitational potential energy is high and the movement distance of the trolley is long; two micrometers are combined with the linear bearing, so that the carbon-free trolley is convenient to detach and debug; and the carbon-free trolley has the advantages of accuracy in adjustment, small errors and accurate movement track.