Patent ID: 8264118

Claim:
A motor assembly comprising: a base mount made from a flexible material, and including a base seat which has an inner periphery that surrounds an axis, and an axial tube which extends along the axis from said inner periphery to terminate at an upper peripheral end abutment, said axial tube having an inner tubular surface to define a central hole; an outer mounting shell member made from a rigid material, defining a column space therein, and including a lower tubular wall segment which defines a socket cavity, and which is fitted in said inner periphery, a middle tubular wall segment which extends upwardly from said lower tubular wall segment and which is fitted in said axial tube, and an upper tubular wall segment which extends from said middle tubular wall segment beyond said upper peripheral end abutment to permit said upper peripheral end abutment to serve as a surrounding ledge; a stator winding subassembly including a plurality of laminated cores which are disposed to surround said upper tubular wall segment and which are supported by resting on said surrounding ledge; retaining and retained members respectively disposed on said lower tubular wall segment and said inner tubular surface adjacent to said inner periphery, and configured such that, immediately after said middle tubular wall segment is brought to be fitted in said axial tube from said inner periphery, said retained member is in axial frictional engagement with said retaining member so as to guard against axial movement of said outer mounting shell member relative to said base mount; a plug member configured to engage in said socket cavity so as to guard against radial disengagement between said retaining and retained members; an inner mounting shell member made from a flexible material, and insertable into said column space of said outer mounting shell member from one of said upper and lower tubular wall segments, said inner mounting shell member including a bushing segment which is fitted in both said upper and middle tubular wall segments, and a receptacle cap which extends radially from said bushing segment; a rotor subassembly including a rotating shaft which extends along the axis, and which is surrounded by said bushing segment; an antifriction bearing which is disposed between said rotating shaft and said bushing segment to permit rotation of said rotating shaft about the axis relative to said receptacle cap; and an upper positioning ring which is configured to rest on an upper end of said antifriction bearing.