SYSTEM FOR PROTECTING A ROTATABLE SHAFT OF A MOTOR FROM EXCESSIVE BENDING MOMENTS

摘要

A motor assembly that includes a motor (102) having a motor casing (112), a rotatable shaft (100) extending from said motor casing (112) to a shaft length and a hub (106) coupled to said rotatable shaft (100), the hub (106) having a circumferential skid surface (107) disposed immediately proximal to the motor casing (112) and having a channel configured to seat a propeller, when a propeller is present, wherein a bending moment applied to the shaft (100) through the hub (106) results in the circumferential skid surface (107) contacting said motor casing (112).