Outer rotor brushless motor stator mount

US11670977B2 · kind B2 · utility

Assignee

• BLACK & DECKER INC. · US

Inventors

• John B. Fogle · White Hall, US
• Dustin Jeffries · Baltimore, US
• Michael R. Marjomaa · Mount Wolf, US
• Kevin L. Pulley · White Marsh, US
• Vincent W. Zou · Timonium, US
• Jarrett A. Dunston · Bel Air, US
• David J. Smith · Columbia, US
• Rene Thieme · Riesa, DE
• Tim Heimrich · Bad Camberg, DE
• Tobias Heep · Steinbach, DE
• Daniel Bernhart · Bad Camberg, DE
• Dieter Schmidtfrerick · Idstein, DE

Key dates

• Filing date: Apr 23, 2020
• Grant date: Jun 6, 2023
• Expiry date: Sep 28, 2040

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02K2205/09
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A brushless direct-current motor is provided includes an inner stator and an outer rotor. A rotor shaft extends through a stator core of the inner stator. A first end cap includes a radial back plate disposed on a first side of the stator and a front center opening through which the rotor shaft is supported via a front bearing. A second end cap includes an inner annular body extending axially inwardly and forming a rear center opening, an outer annular body, and a main body extending on a second side of the stator. The inner annular body includes a first portion that extends at least partially into an opening of the stator core and supports the rotor shaft via a rear bearing, and a second portion rearward of the first portion that received a rear end of the rotor shaft therein and houses a sensor board therein.