Operating assembly for pumps for recirculating a cooling fluid of combustion engines and recirculating pump provided with such an operating assembly

An operating assembly for a pump with an impeller for recirculating a cooling fluid of a combustion engine of a vehicle, comprising

• a driven shaft extending axially with a front end designed to carry the impeller of the pump and rotating around an axis of rotation;
• at least one electromagnetic friction clutch arranged between a movement take-up element for taking up a rotational movement from the combustion engine and the driven shaft;
• an electric drive comprising a stator and a rotor for driving the driven shaft independently of the movement take-up element;
• a fixed support body extending axially between a front part which carries the front end of the shaft and a rear end which rotationally supports the movement take-up element;
• wherein the support body is made of two parts and comprises a first front body part which is proximal to said front end of the shaft and is designed to be fastened to a fixed base, and a bell member fastened to the first body part along a front end of the bell member extending radially away from the axis of rotation of the shaft and comprising an axial extension which supports the movement take-up element adjacent to the electromagnetic clutch via a bearing arranged in between,
• wherein said bell member further comprises a front axial and radially outer section extending axially fully between the front end of the bell member and a radial section of the bell member, the radial section extending from the front axial and radially outer section towards the axis of rotation of the shaft, and said axial extension extending from the radial section and is axially distal from the impeller, and
• wherein the stator of the electric drive is arranged inside the bell member and integral with the front axial and radially outer section of the bell member such that the front axial and radially outer section extends an entire axial length of the stator.