Apparatus for a pump, and a water pump

Abstract

An apparatus is proposed for a pump, in particular a water pump of a motor vehicle having a rotating pump wheel which can be driven, and having a switchable clutch arrangement for switchable connection of the pump wheel to a drive side. According to the invention, the pump wheel is mounted such that it can rotate on a rotatable driveshaft.

1 . An apparatus for a pump of a motor vehicle, in particular a water pump having a rotating pump wheel which can be driven, and having a switchable clutch arrangement for switchable connection of the pump wheel to a drive side, wherein the pump wheel is mounted such that it can rotate on a rotatable driveshaft. 
     
     
         2 . An apparatus according to  claim 1 , wherein the pump wheel is arranged on the driveshaft such that it can move axially. 
     
     
         3 . An apparatus according to  claim 1 , wherein an electromagnetic coil is provided, and acts on a magnetically permeable armature element when current is flowing. 
     
     
         4 . An apparatus according to  claim 3 , wherein the armature element can be moved axially by a magnetic influence of the coil, wherein the switching state of the pump wheel can be predetermined by a selected axial position of the armature element. 
     
     
         5 . An apparatus according to  claim 1 , wherein contact means are arranged on the driveshaft such that they rotate together, and are designed for a force fit and/or an interlock with a contact section on the pump wheel which can rotate on the driveshaft. 
     
     
         6 . An apparatus according to  claim 3 , wherein the armature element and the contact means are matched to one another such that a force fit and/or an interlock can be predetermined between the driveshaft and the pump wheel, as a function of an axial position of the armature element. 
     
     
         7 . An apparatus according to  claim 1 , wherein a displacement member is provided, by means of which a contact section on the pump wheel can be made to interlock and/or have a friction fit with the contact means. 
     
     
         8 . An apparatus according to  claim 3 , wherein the armature element is arranged on a spring element which is connected to the driveshaft such that they rotate together, wherein the spring element is designed to press axially on the pump wheel. 
     
     
         9 . An apparatus according to  claim 3 , wherein the armature element is arranged on the pump wheel. 
     
     
         10 . An apparatus according to  claim 1 , wherein an axially acting bearing stop is formed on the driveshaft for the pump wheel. 
     
     
         11 . An apparatus according to  claim 5 , wherein the contact means on the driveshaft comprise a friction means in the form of a wedge element which can make a friction fit with a friction section on the pump wheel. 
     
     
         12 . A pump for a motor vehicle, in particular a water pump having an apparatus according to  claim 1 .