Patent ID: 7659645
Filing Date: 2010-02-09
Classification: F16F,H02K

Abstract:
1. A rotor assembly comprising: a rotor for rotating in a magnetic field of a motor, said rotor comprising a main rotor cavity and a plurality of first holes; two side boards, each side board comprising a sleeve-shaped main side board body and a disc-shaped outer side board body, said side board body having a main side board cavity, and said outer side board body being perforated by a plurality of second holes; two damping elements each damping element comprising a main damping element cavity; a plurality of rubber sleeves, each rubber sleeve having a rubber sleeve lip; and a plurality of third holes; an axle; and a plurality of positioning pins; wherein said axle extends through said main rotor cavity, two said main side board cavities, and two said main damping element cavities; said main side board body extends through said main damping element cavity and into said main rotor cavity; said plurality of said rubber sleeves is disposed respectively in said plurality of said first holes; said rubber sleeve lip forms a buffer between said rotor and side board; and said plurality of said positioning pins traverses said first holes, said second holes, and said third holes, respectively.