Electrical contact arrangement

An electrical contact arrangement comprising:

• at least one pair of contacts formed by a primary contact ring and a secondary contact ring, which are rotatable with respect to one another about a longitudinal center axis and each of which has a contact surface having a cone envelope shape and surrounds the longitudinal center axis, the secondary contact ring is arranged on a rotor which is mounted rotatably with respect to a housing;
• at least one roller which rolls between the primary and the secondary contact rings of a respective pair of the contacts and is mounted rotatably about an axis of rotation at right angles to the longitudinal center axis, the roller has a contact surface which has a cone envelope shape, surrounds the axis of rotation, and forms a respective line contact, running along a respective contact line, with the contact surfaces of the primary and secondary contact rings;
• at least one spring element which presses the contact surface of the roller against the contact surfaces of the primary and secondary contact rings, a spring force of the at least one spring element acts parallel to the longitudinal center axis;
• wherein a support portion of the secondary contact ring rests on a rotor base part and a contact portion of the secondary contact ring, said contact portion comprising the contact surface of the secondary contact ring, adjoins the support portion radially outwardly,
• a support portion of the primary contact ring rests on a pressure plate, which is acted upon by the at least one spring element and is mounted axially displacably with respect to a housing part of the electrical contact arrangement, and a contact portion of the primary contact ring adjoins the support portion radially outwardly and comprises the contact surface, and
• an angle, measured on a side of the contact surface, between the contact portion and the support portion of the respective primary and secondary contact ring is greater in an assembled state than in an unloaded state, and an inclination of the respective contact portion in the assembled state matches the inclination of the contact surface of the respective roller with which it interacts.