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US 8,569,920 B2Granted
Small electric motor
AssigneeMaxon Motor AG
InventorsDavid Ramon, Hugo Fritschy, Jens Oliver Schulze, Hans-Georg Jansing, Raniero Pittini, Minh Hieu Lam, Alexis Boletis
Life of this patent
Estimating the term…
Abstract
In a small electric motor having a stator and a rotor which includes a solid-cylindrical permanent magnet and at least one shaft element mounted on a face of the permanent magnet and bonded thereto by adhesive, the shaft element has at least one recess on its face facing the permanent magnet. The adhesive is introduced into the recess and contacting the face of the permanent magnet in the area of the recess.
Claims20
A small electric motor comprising:
- a stator;
- and
- a rotor, the rotor including a solid-cylindrical permanent magnet and at least one shaft element mounted on a face of the permanent magnet and bonded thereto by adhesive, wherein the shaft element includes at least one recess on its face facing the permanent magnet, wherein at least a portion of the face of the shaft element contacts the face of the permanent magnet, and a bottom of the recess is spaced apart from the face of the permanent magnet, wherein the adhesive is located in the recess and the adhesive located in the recess directly contacts the face of the permanent magnet.
A small electric motor comprising:
- a stator;
- and
- a rotor, the rotor including a solid-cylindrical permanent magnet and at least one shaft element mounted on a face of the permanent magnet and bonded thereto by adhesive, wherein the shaft element includes at least one recess on its face facing the permanent magnet, the adhesive being introduced into the recess and directly contacting the face of the permanent magnet in an area of the recess,
- wherein the recess on the face of the shaft element is an annular groove, a portion of the face of the shaft surrounded by the recess contacting the face of the permanent magnet and a second portion of the face defined by the recess being spaced apart from the face of the permanent magnet.
1 more element
Dependencies are inferred from the claim text.