Patent ID: 9458757
Filing Date: 2016-10-04
CPC Classification: F01P,F04D

Claim Text:
1. A motor vehicle coolant pump for supplying a coolant to a motor vehicle internal combustion engine, the motor vehicle coolant pump comprising: a two-part pump housing comprising a pump rotor housing part and a body housing part, each of the pump rotor housing part and the body housing part being configured as a separate part, the pump rotor housing part comprising a first mounting flange and the body housing part comprising a second mounting flange which are each configured to fix the pump rotor housing part and the body housing part with respect to each other and to allow a mounting of the pump rotor housing part and the body housing part on each other; a pump rotor arranged in the pump rotor housing part, the pump rotor being configured to be rotated about an axis; an axial coolant inlet provided on the pump rotor housing part; a tangential coolant outlet provided on the pump rotor housing part; a rotary fixation comprising a recess at the pump rotor housing part and a nose configured to engage in the recess at the body housing part, the rotary fixation being configured to allow the pump rotor housing part and the body housing part to be mounted with respect to each other in only one single rotational position; a self-locking axial fixation arrangement configured to axially fix the pump rotor housing part and the body housing part to each other, wherein, the pump rotor housing part further comprises an inwardly open annular groove, the body housing part further comprises an outwardly open annular groove which is configured to correspond to the inwardly open annular groove, the self-locking axial fixation arrangement is formed by the inwardly open annular groove in the pump rotor housing part, the outwardly open annular groove in the body housing part, and by a radially pre-stressed snap ring configured to extend radially into each of the inwardly open annular groove and the outwardly open annular groove, and the first mounting flange comprises a wedge ring surface comprising a wedge-shaped cross-section, the wedge ring surface being configured to push on the radially pre-stressed snap ring in a radial direction when the first mounting flange and the second mounting flange are pushed together in an axial direction, wherein, the inwardly open annular groove in the pump rotor housing part is interrupted in an area of the recess.