Electric direct-current motor with flexible rotor assembly and method for the manufacture thereof
AssigneeLakeview Innovation Ltd.
InventorsArnold Teimel, Yves Triponez, Peter Mitterbäck
Life of this patent
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Abstract
An electric direct current motor is disclosed which includes a shaft, a winding support, a collector having several collector wires, and an air-cored outer rotor winding with several winding terminations. The outer rotor winding is at one end connected to the shaft via the winding support in a torque-proof manner, and is electrically connected with the collector. The winding support can be replaced by a printed circuit board as a bearing component of glass-fiber reinforced thermosetting plastics, wherein the printed circuit board includes at least one layer and is connected to the shaft via a metal hub.
Claims10
An electric direct current motor comprising:
- a shaft;
- a winding support;
- a collector with several collector wires;
- and
- an air-cored outer rotor winding with several winding terminations, wherein the outer rotor winding is at one end connected to the shaft via the winding support in a torque-proof manner, and the outer rotor winding is electrically connected to the collector;
- wherein the winding support is a metallic plate having a central bore for connection with the shaft, wherein the central bore is a through-hole;
- and
- wherein an insulation ring of plastics or ceramics is provided around an outer periphery of the metallic plate for electric insulation from the outer rotor winding, the insulation ring being radially disposed between the outer periphery of the metallic plate and the outer rotor winding,
- wherein the metallic plate is connected to the shaft by a frictional connection between the shaft and the metallic plate and by a material bonding connection between the shaft and the metallic plate.
A method for manufacturing an electric direct current motor comprising:
- a shaft;
- a winding support;
- a collector with several collector wires;
- and
- an air-cored outer rotor winding with several winding terminations, wherein the outer rotor winding is at one end connected to the shaft via the winding support in a torque-proof manner, and the outer rotor winding is electrically connected to the collector;
- wherein the winding support is a metallic plate having a central bore for connection with the shaft;
- and wherein an insulation ring of plastics or ceramics is radially disposed between an outer periphery of the metallic plate and the outer rotor winding;
- wherein for assembling the rotor, the method comprises:
- pressing the metallic plate onto the shaft;
- subsequently welding the metallic plate and the shaft to each other, in one of the following steps wherein:
- the collector with the collector wires is placed as a separate unit onto the shaft , the collector wires are electrically connected to a pertaining winding termination via respective suited contact surfaces after the outer rotor winding has been placed, and then the electrical and mechanical connection points are cast with a casting compound.
Dependencies are inferred from the claim text.