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|1. (WO2017157368) VEHICLE HAVING A PUMP DEVICE|
|Applicants:||SCHAEFFLER TECHNOLOGIES AG & CO. KG
|Title:||VEHICLE HAVING A PUMP DEVICE|
Coolant pumps are frequently used in vehicles, in order to convey coolant in a coolant system through the motor, in particular through the internal combustion engine, of the vehicle. Coolant pumps of this type have a pump shaft and an impeller which is connected fixedly to the pump shaft so as to rotate with it. The pump shaft is mounted rotatably in a pump housing. In order to avoid coolant passing out of the region of the impeller into the housing and, in particular, to the bearing of the pump shaft, sealing rings are used which protect the bearing in the housing against the coolant. Here, according to the invention, a pump device (1) having a pump shaft (2) for driving a pump member for a liquid medium in a medium chamber (M) is used, wherein the pump shaft (2) is arranged at least in sections in the medium chamber (M), having a pump housing section (4) for receiving the pump shaft (2), having an anti-friction bearing device (5), wherein the anti-friction bearing device (5) has a plurality of rolling bodies (9) which are arranged in a rolling body chamber (11), and wherein the pump shaft (2) is mounted in the pump housing section (4) via the anti-friction bearing device (5), wherein the rolling body chamber (11) and the medium chamber (M) are connected in flow terms, with the result that the anti-friction bearing device (5) is lubricated and/or can be lubricated with the medium from the medium chamber (M).