Liquid pump including an impeller connected directly to a rotor receiving sleeve

A fluid pump, comprising:

• an internal rotor rotatable about an axis of rotation relative to an external stator;
• an impeller connected to the internal rotor in a rotationally fixed manner for conveying a fluid;
• the internal rotor including a rotor receiving sleeve, the rotor receiving sleeve including a base body having a receiving chamber configured to receive an anchor unit;
• the internal rotor further including a bearing bushing structured and arranged to penetrate the rotor receiving sleeve coaxially to the axis of rotation, the bearing bushing configured to receive a rotor shaft;
• wherein the impeller is directly connected to the rotor receiving sleeve in a rotationally fixed manner;
• wherein the base body includes a bottom, a cylindrical inner wall, and a cylindrical outer wall;
• wherein the cylindrical inner wall and the cylindrical outer wall project from the bottom toward the impeller such that the bottom at least partially defines an axial end of the base body opposite the impeller;
• wherein the receiving chamber is defined by the cylindrical inner wall, the cylindrical outer wall, and the bottom such that the receiving chamber is annular;
• wherein a cover is arranged on the rotor receiving sleeve closing the receiving chamber;
• wherein the cylindrical inner wall and the cylindrical outer wall each include an axial protrusion projecting therefrom toward the impeller;
• and
• wherein the axial protrusion of the cylindrical inner wall engages a complimentary inner receptacle of the cover and the axial protrusion of the cylindrical outer wall engages a complimentary outer receptacle of the cover.

A fluid pump, comprising:

• an internal rotor rotatable about an axis of rotation relative to an external stator;
• an impeller connected to the internal rotor in a rotationally fixed manner for conveying a fluid;
• the internal rotor including a rotor receiving sleeve, the rotor receiving sleeve including a base body having a receiving chamber configured to receive an anchor unit;
• the internal rotor further including a bearing bushing structured and arranged to penetrate the rotor receiving sleeve coaxially to the axis of rotation, the bearing bushing configured to receive a rotor shaft;
• wherein the impeller is directly connected to the rotor receiving sleeve in a rotationally fixed manner;
• wherein the impeller is directly connected in a rotationally fixed manner to an impeller holder disposed on the base body;
• and
• wherein the impeller includes an annular web disposed on a side of the impeller facing the impeller holder, the annular web enclosed by two radially spaced apart annular grooves and configured to support an annular collar of the impeller holder.