US 12,224,644 B2
Motor bearing preloading system with plastic endbells configured to preload the bearing assemblies
Joseph B. Carter, Mooresville, NC (US); Peter M. Ranker, Mocksville, NC (US); and James M. Campbell, Concord, NC (US)
Assigned to Parker-Hannifin Corporation, Cleveland, OH (US)
Appl. No. 17/801,637
Filed by Parker-Hannifin Corporation, Cleveland, OH (US)
PCT Filed Jan. 29, 2021, PCT No. PCT/US2021/015674
§ 371(c)(1), (2) Date Aug. 23, 2022,
PCT Pub. No. WO2021/225648, PCT Pub. Date Nov. 11, 2021.
Claims priority of provisional application 63/020,736, filed on May 6, 2020.
Prior Publication US 2023/0089611 A1, Mar. 23, 2023
Int. Cl. H02K 11/33 (2016.01); H02K 5/173 (2006.01); H02K 7/08 (2006.01); H02K 21/16 (2006.01)
CPC H02K 5/1732 (2013.01) [H02K 7/083 (2013.01); H02K 11/33 (2016.01); H02K 21/16 (2013.01); H02K 2211/03 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A motor assembly comprising:
a motor that drives an output shaft;
a front endbell assembly fixed to a front end of the motor, the front endbell assembly including a plastic front endbell and a front bearing assembly through which a driving end of the output shaft extends, wherein the plastic front endbell is over-molded about the front bearing assembly and elasticity of the plastic front endbell is configured to apply a front inward biasing force opposite a front outward biasing force at a front anchoring point to preload the front bearing assembly to restrict axial movement of the front bearing assembly; and
a rear endbell assembly fixed to a rear end of the motor opposite from the front end, the rear endbell assembly including a plastic rear endbell and a rear bearing assembly into which a rear end of the output shaft extends, wherein the plastic rear endbell is over-molded about the rear bearing assembly and elasticity of the plastic rear endbell is configured to a apply a rear inward biasing force opposite a rear outward biasing force at a rear anchoring point to preload the rear bearing assembly to restrict axial movement of the rear bearing assembly.