Electric motor drive unit
AssigneeEaton Stamping Company
InventorLyle J. Hamman
Life of this patent
Estimating the term…
Abstract
An electric motor drive unit for driving a worm wheel such as for vehicle window regulator applications wherein a casing housing a rotatable armature utilizes a synthetic plastic end cap at one end, and a worm wheel housing constitutes the motor end cap at the other end. A worm shaft rotatably mounted within the wheel housing upon its own radial and thrust bearings interconnects to the motor armature through a self-aligning drive element extending through a thrust bearing defined in the worm wheel housing. The brush holders for the motor are homogeneously formed of synthetic plastic material upon the associated end cap, and the armature utilizes an inexpensive self-aligning bearing mounted within the end cap and worm wheel housing.
Claims5
An electric motor drive unit for driving a worm wheel comprising, in combination, an electric motor casing having first and second ends, an end cap mounted on said casing first end, a worm wheel housing mounted upon said casing second end having worm wheel support means defined thereon, armature bearing means mounted in said end cap and housing, an armature mounted in said casing rotatably mounted upon said bearings having an axis of rotation, a worm shaft rotatably mounted in said worm wheel housing coaxial with said armature axis, radial and thrust bearings mounted upon said housing separately of said armature bearing means supporting said worm shaft, and an elongated self-aligning drive member interposed between said armature and worm shaft producing a positive drive connection between said motor armature and said worm shaft.
Dependencies are inferred from the claim text.