Electric motor, in particular for hand power tools
AssigneeRobert Bosch GmbH
InventorGuenther Berger
Life of this patent
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Abstract
An electric motor for hand power tools has a rotor shaft, a rotor provided with a metal plate pack which is rotatably supported and non rotatably connected with the rotor shaft, the metal plate pack having a plurality of grooves which are spaced from one another in a peripheral direction and provided with a coating of insulating material, a rotor winding received in the grooves provided with the groove coating, the metal plate pack having an end plate composed of insulating material and arranged at each end side of the metal plate pack, the groove coatings and the end plates together with the rotor shaft as shaft ends axially projecting from the end plates being formed as synthetic plastic parts produced by an injection molding.
Claims15
An electric motor for hand power tools, comprising a rotor including a metal plate pack on a rotor shaft, said rotor being rotatably supported by at least one bearing pin, said at least one bearing pin being nonrotatably connected with said rotor shaft, said metal plate pack having a plurality of grooves which are spaced from one another in a peripheral direction and provided with a groove coating of insulating material;
- a rotor winding received in said grooves provided with said groove coating, said metal plate pack having end places composed of insulating material, said end plats being arranged on opposite end sides of said metal plate pack, wherein said rotor shaft has shaft ends axially projecting from said end plates and said shaft ends are synthetic plastic parts produced by injection molding;
- and a bearing pin formed as an insert in at least one of said shaft ends in alignment with said at least one of said shaft ends.
An electric motor for hand power tools, comprising a rotor including a metal plate pack on a rotor shaft, said rotor being rotatably supported by at least one bearing pin, said at least one bearing pin being nonrotatably connected with said rotor shaft, said metal plate pack having a plurality of grooves which are spaced from one another in a peripheral direction and provided with a groove coating of insulating material;
- a rotor winding received in said grooves provided with said groove coating, said metal plate pack having end places composed of insulating material, said end plate being arranged on opposite end sides of said metal plate pack, wherein said rotor shaft has shaft ends axially projecting from said end plates and said shaft ends are synthetic plastic parts produced by injection molding, wherein said bearing pin extends up to said plate metal pack;
- and an anchoring disk which is enclosed in said end plate and is fixedly connected with said bearing pin at an end side of the latter.
Dependencies are inferred from the claim text.