Pumping device for pumping oil from a storage container to a transmission system of a motor vehicle

1. A pumping device ( 1 ) that pumps oil from an oil sump ( 8 ) of a motor vehicle ( 12 ) to a transmission ( 4 ) of the motor vehicle ( 12 ), the pumping device ( 1 ) comprising:

an oil pump ( 7 ) coupled to the oil sump ( 8 ) of the motor vehicle ( 12 ), the oil pump ( 7 ) being selectively drivable to pump oil from the oil sump ( 8 ) of the motor vehicle ( 12 ) by one or both selected from the group of: (i) a mechanical direct drive ( 9 ) of the transmission ( 4 ), via a shaft ( 15 , 54 ); and (ii) a switchable electric drive ( 10 ) of an electric motor ( 11 ), via a hollow shaft ( 16 , 53 ),

wherein:

the oil pump ( 7 ) has a rotatable rotor ( 19 ) and a rotor part ( 20 ) movable relative to one another to effect pumping of the oil, the rotor part ( 20 ) being mounted rotatably with respect to the rotatable rotor ( 19 ), and oil feed elements ( 24 , 25 , 57 , 58 ) for the rotor ( 19 ),

the mechanical direct drive ( 9 ) of the transmission ( 4 ) is connected to the rotor ( 19 ) and the switchable electric drive ( 10 ) of the electric motor ( 11 ) is connected to the rotor part ( 20 ), and

the rotor ( 19 ) is fastened on the shaft ( 15 , 54 ) and the rotor part ( 20 ) is connected to the hollow shaft ( 16 , 53 ), the hollow shaft ( 16 , 53 ) arranged directly radially adjacent to and enclosing the shaft ( 15 , 54 ) concentrically.

2. The pumping device as claimed in claim 1 , further comprising a stationary housing ( 13 , 52 ),

wherein:

the rotor part ( 20 ) is mounted rotatably with respect to the stationary housing ( 13 , 52 ) and is sealed by a radial seal ( 28 ), and

inlet and outlet connectors ( 17 , 18 , 60 , 61 ) configured to provide hydraulic connection of the oil pump ( 7 ) are arranged on the housing ( 13 , 52 ).

3. The pumping device as claimed in claim 2 , wherein the stationary housing ( 13 ) delimits a common recess ( 14 ) in which are arranged the electric motor ( 11 ) associated with the electric drive ( 10 ) and the rotor part ( 20 ) and the rotor ( 19 ) of the oil pump ( 7 ).

4. The pumping device as claimed in claim 2 , wherein the stationary housing ( 52 ) delimits:

(a) a first recess ( 51 ) in which are arranged the rotor part ( 20 ) and the rotor ( 19 ) of the oil pump ( 7 ), and

(b) a second recess ( 50 ) in which is arranged the electric motor ( 48 ) of the electric drive ( 10 ).

5. The pumping device as claimed in claim 2 , wherein the rotor part ( 20 ) is configured as an inner housing arranged inside the housing ( 13 , 52 ) with a ring ( 21 ) that encloses the rotor ( 19 ) radially and control plates ( 22 , 23 ) that lie opposite the end sides of the rotor ( 19 ).

6. The pumping device as claimed in claim 5 , wherein inlet and outlet openings ( 26 , 27 , 55 , 56 ) are arranged on the rotor part ( 20 ).

7. The pumping device as claimed in claim 6 , wherein at least one of the inlet and outlet openings ( 26 , 27 , 55 , 56 ) is arranged on the control plates ( 22 , 23 ) of the rotor part ( 20 ).

8. The pumping device as claimed in claim 6 , wherein at least one of the inlet and outlet openings ( 26 , 27 , 55 , 56 ) is arranged on the ring ( 21 ) of the rotor part ( 20 ), which ring ( 21 ) encloses the rotor ( 19 ).

9. The pumping device as claimed in claim 1 , wherein the electric drive ( 10 ) has a step-down gear mechanism ( 59 ).

10. The pumping device as claimed in claim 1 , wherein the direct drive ( 9 ) and the electric drive ( 10 ) are of self-locking design.

11. The pumping device as claimed in claim 1 , wherein the oil pump ( 7 ) is configured as an annular gear pump ( 36 ), as a vane cell pump ( 37 ) or as an external gear pump ( 40 ).