NON-TRACK-BOUND VEHICLE HAVING A CURRENT COLLECTOR

The invention relates to non-track-bound, electrically or hybrid-electrically driven vehicles including a current collector supplying traction energy from a two-pole, electrical overhead line system. The current collector has an erectable supporting frame with a fixed end articulated on a vehicle chassis and a free end articulated to a rocker support. For each contact pole, a rocker with contact strips is resiliently mounted on the rocker support by a spring assembly. A restoring force of the spring assembly has a constant spring characteristic along its compression travel. The spring assembly compression travel includes, successively, a first spring travel with restoring force increasing with a first spring constant, a second spring travel with restoring force remaining constant, and a third spring travel with restoring force rising with a second spring constant greater than the first spring constant, resulting in high contact quality with varying overhead wire heights.