Non-track-bound vehicle having a current collector

A non-track-bound, electrically or hybrid-electrically powered vehicle (1), comprising:

• a current collector for feeding traction energy from a two-pole electrical overhead line system having one contact wire for each contact pole;
• said current collector having a rocker support;
• said current collector having a support frame configured to be raised, said support frame having a fixed end supported in an articulated manner on a vehicle chassis and a free end connected in an articulated manner to said rocker support;
• rockers each having a respective contact strip for each respective contact pole;
• at least one respective spring assembly each resiliently mounting a respective one of said rockers with a respective one of said contact strips on said rocker support;
• said at least one spring assembly having a compression travel and a restoring force with a continuous spring characteristic curve on said compression travel;
• and
• said compression travel successively having a first spring travel, on which said restoring force increases with a first spring constant, a second spring travel, on which said restoring force remains constant, and a third spring travel, on which said restoring force increases with a second spring constant being greater than said first spring constant.