Black Decker Inc.

Marcus E E Rydin

Dustin Jefferies

David J Smith

Justin H Ayers

Sumiteru Mori

Kristopher Cochran

Jarrett A Dunston

Ross Arthur Billings

Gale Anthony Heslop

John B Fogle

John D Cox

Barak N Gohn

Timothy W French, Jr

Timothy Wayne French, Jr

A power tool is provided including a housing having a grip portion with a grip circumference of smaller than or equal to approximately 120 mm; and a brushless direct-current (BLDC) motor at least partially disposed within the grip portion of the housing and configured to output a maximum power output of at least 450 watts. The motor includes a stator including a stator core and stator windings; and a rotor rotatably received within the stator and including a rotor shaft extending along a longitudinal axis and a series of permanent magnet rings mounted sequentially along the longitudinal axis and surrounding the rotor shaft, each permanent magnet including a plurality of magnetic poles.

High-power motor for a body-grip power tool

A power tool is provided including a housing having an elongated body having an outer diameter that is at most approximately 34 mm, and an outer-rotor electric motor disposed within the elongated body of the housing. The electric motor is configured to provide a maximum power output of approximately greater than or equal to 470 watts and a maximum output speed of greater than 25,000 rotations-per-minutes (RPM) when powered by the battery pack having a maximum rated voltage of 20V and rated capacity of 2 Amp-hours.

Power tool having an outer-rotor brushless motor

A motor assembly includes a stator having a stator core, stator windings, and a routing insulator configured to electrically insulate the stator core from the stator windings; a rotor rotatably received within the stator; and a bearing bridge received at least partially within the routing insulator and including a main body forming a center pocket arranged to support a bearing of the rotor shaft. A circuit board is provided including a circuit board, and an overmold structure forming an annular body on a surface of the circuit board arranged to mate with the main body of the bearing bridge to substantially seal the center pocket from ingress of debris particles.

Circuit board assembly for compact brushless motor

A motor is provided including: a stator including a stator core, stator windings, and an end insulator; a rotor rotatably received within the stator; and stator terminals supported by the routing insulator and extending away from the stator. Each stator terminal includes a main body having a curved portion, a tang portion folded over the main body and receiving a portion of a magnet wire therein to make an electrical connection with at least one of the stator windings, and a terminal pin projecting axially away from the stator core. The stator core has a maximum diameter of less than or equal to approximately 34 mm defining an outer envelope of the stator, and the stator terminals are fully contained within the outer envelope.

Compact brushless motor including in-line terminals

A motor is provided including a motor housing having an open end; a stator disposed within the motor housing and including a stator core, stator windings, and an end insulator that electrically insulate the stator core from the stator windings and includes an annular body; a rotor rotatably received within the stator and including a rotor shaft extending along a longitudinal axis and permanent magnets; and a bearing bridge including a center pocket arranged to support a bearing of the rotor shaft. The bearing bridge is received at least partially within the end insulator. The annular body of the end insulator includes at least one peripheral opening located within the motor housing, and the bearing bridge is radially piloted relative to the motor housing via a retaining member received through the at least one peripheral opening.

Brushless motor including a nested bearing bridge

A power tool is provided including a housing including a grip portion; and a brushless direct-current (BLDC) motor at least partially disposed within the grip portion of the housing. The motor includes a stator having a rotor core, a rotor, and front and rear bearing support structures. The stator core includes a non-segmented construction with a maximum diameter of approximately smaller than or equal to 34 mm, and a ratio of a motor size (Km) constant of the motor to a length of the motor is in the range of approximately 0.39 to 0.59 (Nmm/√W)/mm. When powered by a 20 V battery pack, a ratio of a maximum power output of the motor to a volume of the motor is at least approximately 0.0106 W/mm{circumflex over ( )}3.

Brushless DC motor for a body-grip power tool

A motor is provided including a motor housing having a substantially cylindrical body and at least one open end, a stator disposed within the motor housing, and a rotor rotatably received within the stator. The motor further includes a bearing bridge mounted on the open end of the motor housing and including a main body forming a center pocket arranged to support a rotor shaft, an outer ring configured to be fittingly received through the open end of the motor housing, and at least one fastening receptacle formed radially through the outer ring. The motor housing includes a side opening through which a fastener is radially fastened into the fastening receptable to secure the bearing bridge to the motor housing.

Canned brushless motor

An outer-rotor brushless direct-current (BLDC) motor is provided including a rotor shaft, a motor housing having an open end and a closed end that supports a first motor bearing, a stator core having an aperture extending therethrough, a stator mount coupled to the open end and including an elongated cylindrical member projecting into the aperture of the stator core and a radial wall that supports a second motor bearing, an outer rotor, and a rotor mount including an outer rim arranged to couple to the outer rotor and an inner body mounted on the rotor shaft. An intermediate bearing is received at least partially within the aperture of the stator core to radially support the stator core relative to the rotor shaft.

Growing community of inventors

Baltimore, MD, United States of America

Marcus E E Rydin