we designed a trackless trolley which has better structure and mechanism and can run on the cement floor. This trackless trolley is connected with the tractor by a pin, which is easy to be removed. The tow bar could be installed both the front and the tail of the trackless trolley. The four wheels are connected by steel bars to assistant to the turning. This kind of trackless trolley has been applied in many fields for transportation during the warehouse and workshop, which has been defined as cost savings, labor savings and highly secure during in use.
