US 11,722,033 B2
Electric motor with backup bearing assembly
Grant Michael Beall, Plano, TX (US); and Michael Raymond Hull, Fort Worth, TX (US)
Assigned to Textron Innovations Inc., Providence, RI (US)
Filed by Bell Textron Inc., Fort Worth, TX (US)
Filed on Aug. 24, 2021, as Appl. No. 17/410,519.
Prior Publication US 2023/0061193 A1, Mar. 2, 2023
Int. Cl. H05K 7/08 (2006.01); H02K 7/08 (2006.01); F16C 35/063 (2006.01)
CPC H02K 7/088 (2013.01) [F16C 35/063 (2013.01); F16C 2380/26 (2013.01); H02K 2213/06 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An electric motor comprising:
a stator fixedly connected to a motor hub;
a rotor including a rotor carrier and rotor magnets configured to rotate relative to the stator;
a drive shaft rotatable about an axis;
a shear adapter fixed to the rotor carrier and extending around a portion of the drive shaft;
a primary bearing providing bearing support between the shear adapter and the motor hub;
an auxiliary bearing providing bearing support between the shear adapter and the drive shaft; and
a shear pin fixedly interconnecting the drive shaft and the shear adapter, wherein breakage of the shear pin disconnects the rotor carrier and the shear adapter from the drive shaft allowing the drive shaft to freewheel relative to the rotor carrier and the shear adapter.