US 12,040,732 B2
Battery-powered stand-alone motor unit
Jonathan E. Abbott, Milwaukee, WI (US); James Wekwert, Wauwatosa, WI (US); Logan M. Hietpas, Shorewood, WI (US); John S. Scott, Brookfield, WI (US); and Troy C. Thorson, Cedarburg, WI (US)
Assigned to MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
Filed by MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
Filed on Aug. 26, 2019, as Appl. No. 16/551,197.
Claims priority of provisional application 62/837,422, filed on Apr. 23, 2019.
Claims priority of provisional application 62/813,920, filed on Mar. 5, 2019.
Claims priority of provisional application 62/774,946, filed on Dec. 4, 2018.
Claims priority of provisional application 62/723,540, filed on Aug. 28, 2018.
Prior Publication US 2020/0076337 A1, Mar. 5, 2020
Int. Cl. H02P 6/06 (2006.01); B08B 9/032 (2006.01); F16H 1/14 (2006.01); F16H 1/28 (2006.01); H01M 50/213 (2021.01); H02K 7/116 (2006.01); H02K 11/00 (2016.01); H02K 11/27 (2016.01); H02K 11/33 (2016.01); H02K 21/16 (2006.01); H02P 6/28 (2016.01); H02P 6/34 (2016.01); E01C 19/40 (2006.01); E02D 3/046 (2006.01); F16H 1/20 (2006.01)
CPC H02P 6/06 (2013.01) [B08B 9/0321 (2013.01); F16H 1/14 (2013.01); F16H 1/28 (2013.01); H01M 50/213 (2021.01); H02K 7/116 (2013.01); H02K 11/0094 (2013.01); H02K 11/27 (2016.01); H02K 11/33 (2016.01); H02K 21/16 (2013.01); H02P 6/28 (2016.02); H02P 6/34 (2016.02); E01C 19/402 (2013.01); E02D 3/046 (2013.01); F16H 1/20 (2013.01); H01M 2220/20 (2013.01)] 34 Claims
OG exemplary drawing
 
1. A stand-alone motor unit for use with a separate piece of power equipment, the motor unit comprising:
a housing;
a flange coupled to the housing on a first side thereof, the flange configured to couple the motor unit to the piece of power equipment;
a plurality of apertures through the flange defining a first bolt pattern that matches an identical, second bolt pattern defined in the piece of power equipment;
an electric motor located within the housing and having a power output of at least about 2760 W and a nominal outer diameter of up to about 80 mm, the motor including
a stator, and
a rotor supported for relative to the stator,
a power take-off shaft receiving torque from the rotor and protruding from one of the flange or a second side of the housing adjacent the first side, the power take-off shaft configured to transfer torque to the piece of power equipment;
a controller positioned within the housing and electrically connected to the motor;
a battery pack including
a pack housing,
battery cells supported by the pack housing, the battery cells being electrically connected and having a nominal voltage of up to about 80 V, and
a first terminal electrically connected to the battery cells; and
a battery receptacle coupled to the housing and including a second terminal electrically connected to the controller and engageable with the first terminal to transfer current between the battery pack and the motor.