US Patent 10377434 Trailer train having a lifting device

A tugger train trailer including a support frame configured as a transport material cart entrained in a trailer train, which has a chassis with at least two wheels, and a lifting device configured to adjust the height of at least part of the support frame relative to the wheels. The lifting device may include at least one rotatable eccentric disc, which is supported on a cam roller. The eccentric disc may be installed on a shaft that is driven in rotation. The cam roller may be mounted on the support frame or a part of the support frame.