Motor vehicle, in particular a commercial vehicle or a bus, - having a current collector for transferring electrical energy between a traction drive of the motor vehicle and a fixed-location electrical overhead line (40, 45), a vehicle structure and a vehicle longitudinal axis, along which the motor vehicle is configured to be moved, - wherein the current collector has a supporting rigging, - wherein the supporting rigging comprises at least an upper arm and a lower arm, - wherein the lower arm is coupled to the vehicle structure by means of a first pivot joint, such that it can rotate about a first axis of rotation, - wherein the upper arm is coupled to the lower arm by means of a second pivot joint, such that it can rotate about a second axis of rotation, - wherein the first axis of rotation and/or the second axis of rotation are oriented in parallel with the vehicle longitudinal axis of the motor vehicle, - wherein a second tensioning means is provided, wherein the second tensioning means is coupled to the upper arm and to the lower arm, - wherein the second tensioning means provides a second force, - wherein the second force distorts the upper arm with respect to the lower arm, - wherein the second tensioning means comprises a second drive facility, - wherein the second drive facility is embodied to provide the second force in a switchable manner, - wherein the second drive facility is embodied to alter a position of the upper arm in relation to the lower arm, - wherein the current collector comprises a support facility, - wherein the support facility comprises a support structure and a coupling means, characterised in that - the support structure is connected to the vehicle structure and is embodied such that it runs around the first axis of rotation in an arcing manner, at least in sections, - the support structure is arranged in a rotation plane for the first axis of rotation, - the coupling means couples the lower arm to the support structure, and - the support facility is embodied to brace torsion forces about a transverse axis of the motor vehicle resulting from wind loads on the current collector due to the movement of the motor vehicle and acceleration forces in the longitudinal direction on the current collector, as well as friction forces due to the collector strip (205, 210) rubbing along the overhead line (40, 45) and to substantially release the first pivot joint from a torsion load about this transverse axis. - having a current collector for transferring electrical energy between a traction drive of the motor vehicle and a fixed-location electrical overhead line (40, 45), a vehicle structure and a vehicle longitudinal axis, along which the motor vehicle is configured to be moved, - wherein the current collector has a supporting rigging, - wherein the supporting rigging comprises at least an upper arm and a lower arm, - wherein the lower arm is coupled to the vehicle structure by means of a first pivot joint, such that it can rotate about a first axis of rotation, - wherein the upper arm is coupled to the lower arm by means of a second pivot joint, such that it can rotate about a second axis of rotation, - wherein the first axis of rotation and/or the second axis of rotation are oriented in parallel with the vehicle longitudinal axis of the motor vehicle, - wherein a second tensioning means is provided, wherein the second tensioning means is coupled to the upper arm and to the lower arm, - wherein the second tensioning means provides a second force, - wherein the second force distorts the upper arm with respect to the lower arm, - wherein the second tensioning means comprises a second drive facility, - wherein the second drive facility is embodied to provide the second force in a switchable manner, - wherein the second drive facility is embodied to alter a position of the upper arm in relation to the lower arm, - wherein the current collector comprises a support facility, - wherein the support facility comprises a support structure and a coupling means, - the support structure is connected to the vehicle structure and is embodied such that it runs around the first axis of rotation in an arcing manner, at least in sections, - the support structure is arranged in a rotation plane for the first axis of rotation, - the coupling means couples the lower arm to the support structure, and - the support facility is embodied to brace torsion forces about a transverse axis of the motor vehicle resulting from wind loads on the current collector due to the movement of the motor vehicle and acceleration forces in the longitudinal direction on the current collector, as well as friction forces due to the collector strip (205, 210) rubbing along the overhead line (40, 45) and to substantially release the first pivot joint from a torsion load about this transverse axis.