Patent ID: 8466594

Claim:
A motor stator, comprising: a body member formed of a stack of silicon steel plates, said body member comprising a plurality of inwardly extending polar columns, and a wire-winding groove defined between each two adjacent said polar columns, said body member defining in the axial direction thereof a middle section and two opposing end sections at two opposite ends of said middle section, said middle section having a predetermined height, said end sections having a predetermined height, the diameter of the part of said wire-winding grooves corresponding to said end section portions being greater than the diameter of the part of said wire-winding grooves corresponding to said middle section; two wire racks, each said wire rack comprising a plurality of foot tubes axially extended from one side thereof and respectively inserted into said wire-winding grooves of said body member corresponding to said end section portions, the internal space defined in each said foot tube axially cutting through the respective wire rack and being kept beyond said middle section, said foot tubes having a cross section fitting the cross section of the part of said wire-winding grooves corresponding to said middle section of said body member, said foot tubes having an inner diameter the diameter of the part of said wire-winding grooves corresponding to said middle section of said body member; and a plurality of insulation sheets shaped like an elongated open frame bar and equal to said wire-winding grooves of said body member in amount, said insulation sheets having a cross section fitting said wire-winding grooves of said body member and a length greater than the height of said middle section of said body member, said insulation sheets being respectively set in said wire-winding grooves of said body member and said foot tubes of said wire racks for allowing winding of coils in said wire-winding grooves and said foot tubes and isolated from said body member by said insulation sheets and said wire racks.