Patent ID: 9109463
Filing Date: 2015-08-18
Classification: B60T,F01D

Abstract:
1. A booster apparatus for a vehicle brake system, the apparatus comprising: a housing comprising a rear housing member and a front housing member that define a receiving space therein; a ball screw shaft at least in part installed in the receiving space of the housing and rotatable about an axial direction; a rotor rotatable about the rotational axis and connected to the ball screw shaft for transferring torque of the rotor to the ball screw shaft; the rotor comprising a sleeve extending in the axial direction and a flange extending in the radial direction; a first bearing installed between the rear housing member and the rotor, wherein the first bearing abuts the sleeve such that a radial direction load applied to the rotor is transferred to the rear housing member via the first bearing; and a second bearing installed between the front housing member and the rotor, wherein the second bearing abuts the flange such that an axial direction load applied to the rotor is transferred to the front housing member via the second bearing.