Water pump for cooling circuit of motor vehicle, has device arranged between race and shaft to connect or disconnect race and shaft, and units displacing magnetic elements to bring closer or move away from one another based on parameters

摘要

The pump has a coupling device arranged between an outer race (9'') and a transmission shaft (4) to connect/disconnect the race and the shaft based on predefined parameters e.g. water temperature. The device has a rotating case (11) with magnetic elements (12, 13) i.e. permanent magnets, integrated to the shaft and the race, respectively. Displacement units constituted of a ductile element (16) made of steel, a return spring (17), a stop, a control flange (14) and rotational edges (15), for displacing the elements (12, 13) to bring closer or move away from one another, based on the parameters.