Patent ID: 8946969
Filing Date: 2015-02-03
Classification: H02K,Y10T

Abstract:
1. A squirrel-cage rotor of an asynchronous machine, comprising: a shaft rotatable about an axis; a laminated core being rotation-locked on the shaft and having grooves arranged in the laminated core and opposing end faces, wherein the laminated core has an outside diameter and axially extending end sections of the laminated core proximate to the end faces have an outside diameter that is smaller than the outside diameter of the laminated core; a squirrel-cage winding having rotor rods disposed in the grooves and a cage ring disposed on each of the end faces in one-to-one correspondence and electrically connecting the rotor rods; and a pair of retaining elements disposed on the shaft, wherein each end face of the laminated core has one of the retaining elements, each retaining element extending in a radial direction in form of a disk or a spoke and having at least one of an axially extending cylindrical wall and an axially extending finger extending from on an outer peripheral end section of the respective disk or spoke, wherein the axially extending cylindrical wall or the axially extending finger overlaps at each end section in the axial direction both the cage ring and a respective predefined axial section of the rotor rods that terminate in the cage ring, as well as the axially extending end sections of the laminated core, without increasing the outside diameter of the laminated core.