Coolant pump for a vehicle

A pump for recirculating a cooling fluid for a vehicle, comprising:

• a pump body (11), which is fixed during use;
• an impeller (1) mounted on a driven shaft (2);
• at least one friction coupling (20) of the electromagnetic type, comprising a fixed electromagnet (22), a rotor (21;121) and an armature (23);
• movement take-up means (21c;121c) for taking up a rotational movement, configured to be connected to a movement source;
• said movement take-up means (21c) being mounted on an outer bearing (40) keyed onto the pump body (11);
• an electric motor (50) for driving the driven shaft (2) independently of the movement take-up means (21c;
• 121c);
• a bell member (14;153) fastened to an end of the driven shaft opposite to that which carries the impeller,
• wherein the friction coupling is designed to rotationally couple/decouple the movement take-up means (21c;121c) and the bell member (14;153);
• wherein said electric motor (50) is arranged inside the bell member (14) on a side opposite to the impeller (1) relative to the friction coupling (20);
• and wherein
• said movement take-up means (21c;121c) is formed on an outer circumferential edge of a shaped circular ring (21a;121a) which forms part of said rotor (21) and is arranged in a position radially more outer lying than the electromagnet (22) and/or the armature (23) of the friction coupling.