Patent ID: 8932037
Filing Date: 2015-01-13
Classification: F04C

Abstract:
1. A pump unit of a vane pump having no dedicated housing, comprising: a drive shaft; a rotor cooperating with the drive shaft for accommodating vanes; a contour ring surrounding the rotor; a first and a second side plate, the first and second side plate being configured to a side of the contour ring; a sleeve being movably supported on the drive shaft, the sleeve being situated downstream of the second side plate in an axial direction of the pump unit; a securing element for axially securing the sleeve on the drive shaft in an uninstalled state of the pump unit, the pump unit not being installed in a transmission housing in the uninstalled state; a spring element, the spring element preloading the second side plate against a first portion of the transmission housing in an installed state of the pump unit, the pump unit being installed in the transmission housing in the installed state, the spring element being a fixed component of the pump unit; and a supporting device on a radial outer surface of the sleeve, the supporting device axially abutting a second portion of the transmission housing axially opposite the first portion of the transmission housing in the installed state such that the rotor is axially between the first portion of the transmission housing and the second portion of the transmission housing.