Stator assembly with an overmolding that secures magnets to a flux ring and the flux ring to a stator housing
AssigneeBlack & Decker Inc.
InventorsEarl M. Ortt, Michael J. Agnes, Hung Du
Life of this patent
Estimating the term…
Abstract
A stator assembly for an electric motor includes a stator housing, a flux ring inserted into the stator housing after the stator housing is formed and a plurality of magnets on an inner surface of the flux ring. Overmold material is molded around the magnets in the flux ring, such as by injection molding. The overmold material secures the magnets to the flux ring and the flux ring to the housing. In an aspect, the overmold material is molded to form at least one of a commutator end or rear bearing support, front bearing support and fan baffle.
Claims11
A stator assembly, comprising:
- a housing;
- a flux ring disposed on an inner surface of the housing wherein the housing and the flux ring are separately formed and the flux ring is disposed on the inner surface of the housing after the housing is formed;
- a plurality of permanent magnets disposed around an inner surface of the flux ring;
- and
- a material overmolded around the plurality of magnets to secure the magnets to the flux ring and to secure the flux ring to the housing.
A stator assembly comprising:
- a housing;
- a flux ring disposed on an inner surface of the housing wherein the housing and the flux ring are separately formed and the flux ring is disposed on the inner surface of the housing after the housing is formed;
- a plurality of permanent magnets disposed around an inner surface of the flux ring;
- a material overmolded around the plurality of magnets to secure the magnets to the flux ring;
- and
- at least one of a rear bearing support, front bearing support and fan baffle integrally formed of the overmold material during molding of the overmold material.
A power tool comprising:
- a housing;
- and
- a motor disposed within the housing and having an output coupled to a transmission, the motor having a stator assembly having a flux ring disposed on an inner surface of a stator housing wherein the stator housing and flux ring are separately formed and the flux ring is disposed on the inner surface of the stator housing after the stator housing is formed, a plurality of permanent magnets disposed around an inner surface of the flux ring, and a material overmolded around the plurality of magnets to secure the magnets to the flux ring and secure the flux ring to the stator housing.
Dependencies are inferred from the claim text.