Patent ID: 8143761
Filing Date: 2012-03-27
Classification: H02K

Abstract:
1. A motor assembly comprising: a base mount including a base seat which has an inner periphery that surrounds an axis to define a central hole therein, and an axial tube which extends along the axis from said inner periphery to terminate at an upper peripheral end, said axial tube having inner and outer tubular surfaces radially opposite to each other; a plurality of support ledges disposed on said outer tubular surface and angularly displaced from one another about the axis; a stator winding subassembly including a plurality of laminated cores which are disposed to surround said outer tubular surface of said axial tube, and which are supported by resting on said support ledges; a plurality of abutments which are angularly displaced from one another about the axis, and which are disposed on said outer tubular surface of said axial tube adjacent to said upper peripheral end such that, once said upper peripheral end is urged outwardly and radially by virtue of a radial pressing force exerted on said inner tubular surface, said abutments are brought into firm engagement with said laminated cores, thereby further ensuring immobility of said laminated cores between said support ledges and said abutments; upper and lower retaining members which are disposed on said inner tubular surface of said axial tube and which are opposite to each other relative to the axis; a mounting shell member made from a flexible material, and insertable into said axial tube from one of said upper peripheral end and said inner periphery, said mounting shell member including a tubular shell wall which surrounds the axis, and which has inner and outer shell surfaces radially opposite to each other, and a receptacle cap disposed to engage said inner shell surface; upper and lower retained members which are disposed on said outer shell surface of said mounting shell member, and which are configured such that, immediately after said mounting shell member is inserted into said axial tube, said upper and lower retained members are respectively in axial frictional engagements with said upper and lower retaining members so as to guard against axial movement of said mounting shell member relative to said axial tube; a rotor subassembly including a revolving shaft extending along the axis; an antifriction bearing which is disposed between said revolving shaft and said inner shell surface of said mounting shell member to permit said revolving shaft to revolve about the axis, and which has an upper end and a lower end that is disposed to rest on said receptacle cap; and an upper positioning ring which is sleeved on said revolving shaft and which is configured to rest on said upper end of said antifriction bearing.