Mechanical automotive vacuum pump

The invention refers to a mechanical automotive vacuum pump (10) with a housing arrangement (11) enclosing a pumping chamber (14) and rotatably supporting a pump rotor (15) with a rotor body (16). Therotor body (16) is provided with a vane slit (21) wherein a slidable pump vane (20) is supported which separates the pumping chamber (14) into several rotating pumping compartments. A coupling structure (40) and a single radial bearing (30) are provided at a coupling-sided end portion (44) of the rotor body (16). No radial bearing is provided at a vane-sided end portion (42) of the rotor body (16) so that the rotor body (30) is radially supported cantilevered. A backing support cone structure (24) is provided at the front end of the vane end portion (42). The backing support cone structure (24) is defined by a conical ring (28) of the rotor body (16) and a corresponding static conical ring (26) of the housing arrangement (11). 本发明涉及种机械式汽车真空泵(10)，其设置有外壳装置(11)，该外壳装置包围泵送室(14)并且可旋转地支撑具有转子主体(16)的泵转子(15)。转子主体(16)设置有叶片狭