Patent ID: 8820489
Filing Date: 2014-09-02
Classification: F16D,H02K

Abstract:
1. A wheel drive comprising: an electric motor having a motor housing and a motor shaft supported for rotation relative to said motor housing about a motor axis, said motor shaft adapted to be coupled to a wheel component for driving a vehicle wheel, and wherein said motor housing includes a housing recess at one end face of said electric motor; a parking brake disk mounted on said motor shaft for rotation with said motor shaft about said motor axis, and wherein said parking brake disk is slidable relative to said motor housing in a direction common with said motor axis; at least one brake piston held against rotation and mounted for sliding movement in a direction common with said motor axis, said at least one brake piston and said parking brake disk being received within said housing recess, wherein said at least one brake piston includes a plurality of brake pistons slidably suorted by a brake housing that is mounted to said motor housing, and wherein said brake housing includes a plurality of piston openings, one piston opening for each of said brake pistons, wherein each piston opening extends entirely through a thickness of said brake housing from an outboard end face of said brake housing to an inboard end face of said brake housing; and wherein said at least one brake piston is held in a release position by a first mechanism and said at least one brake piston being movable to engage said parking brake disk by a second mechanism to hold said parking brake disk in a park applied position.