US 12,294,249 B2
Battery-powered stand-alone motor unit
Connor P. Sprague, Milwaukee, WI (US); Evan M. Glanzer, Milwaukee, WI (US); and John E. Koller, Waukesha, WI (US)
Assigned to MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
Filed by MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
Filed on Apr. 11, 2023, as Appl. No. 18/133,017.
Application 18/133,017 is a continuation of application No. 17/092,917, filed on Nov. 9, 2020, granted, now 11,658,546.
Claims priority of provisional application 62/952,566, filed on Dec. 23, 2019.
Claims priority of provisional application 62/932,703, filed on Nov. 8, 2019.
Prior Publication US 2023/0246522 A1, Aug. 3, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H02K 5/22 (2006.01); H01M 50/209 (2021.01); H02K 7/116 (2006.01); H02K 7/14 (2006.01); H02K 11/00 (2016.01); H02K 11/33 (2016.01); H02K 21/16 (2006.01); E01C 19/40 (2006.01); F16F 15/04 (2006.01); F16F 15/08 (2006.01)
CPC H02K 11/0094 (2013.01) [H01M 50/209 (2021.01); H02K 7/116 (2013.01); H02K 11/33 (2016.01); H02K 21/16 (2013.01); E01C 19/402 (2013.01); F16F 15/04 (2013.01); F16F 15/08 (2013.01); H01M 2220/30 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A stand-alone motor unit for use with a piece of power equipment, the motor unit comprising:
a housing;
an electric motor, the motor including
a stator,
a rotor rotatable relative to the stator, the rotor including an output shaft,
a housing in which the stator and rotor are arranged, and
an adapter plate coupled to the housing, the adapter plate including a first plurality of holes defining a first hole pattern, the output shaft of the rotor protruding from the adapter plate;
a battery pack for providing power to the motor;
a power take-off shaft protruding from the housing; and
a gearbox including
a second plurality of holes defining a second hole pattern that is identical to the first hole pattern, such that when the first hole pattern is aligned with the second hole pattern, the gearbox is configured to be coupled to the adapter plate, and
a gear train for transferring torque from the output shaft of the rotor to the power take-off shaft when the gearbox is coupled to the adapter plate.