Spindle motor with an electro-conductive connection between the bearing system and the baseplate or flange
View Patent ↗Permanent electro-conductive connection is achieved between a bearing component and a baseplate/flange by providing at least one solid-state contact element between the baseplate/flange and the bearing component. The contact element establishes an electric contact between these parts by exercising mechanical force on the baseplate/flange and/or the bearing component. Alternatively, at least one welding seam may be formed between the baseplate/flange and the bearing component to establish the electro-conductive connection.
1. A spindle motor comprising:
a baseplate;
a rotor;
a bearing system, said bearing system further comprising at least one component directly or indirectly electrically connected to said rotor;
a recess located between said baseplate and said bearing component; and
at least one solid-state contact element,
wherein a permanent electro-conductive connection is provided between said baseplate and said bearing component of said bearing system through the exertion of mechanical forces by said solid-state contact element on at least one of said baseplate and said bearing component and wherein said solid-state contact element is accommodated in said recess.
2. The spindle motor according to claim 1 , wherein said solid-state contact element is positioned between adjoining surfaces of said baseplate and said bearing component.
3. The spindle motor according to claim 1 , wherein said solid-state contact element is pressed into said recess.
4. The spindle motor according to claim 1 , wherein said solid-state contact element is pressed into said bore.
5. The spindle motor according to claim 1 wherein said solid-state contact element is a spherical body.
6. The spindle motor according to claim 1 , wherein said solid-state contact element is a wire-shaped pin.
7. The spindle motor according to claim 1 , wherein said solid-state contact element is an elastic spring.
8. The spindle motor according to claim 1 , wherein said solid-state contact element is selected from the group consisting of a coil spring, a leaf spring and an annular spring.
9. The spindle motor according to claim 1 , wherein said bearing component is a bearing sleeve accommodating said shaft.
10. A spindle motor comprising:
a baseplate;
a rotor;
a bearing system, said bearing system further comprising at least one component directly or indirectly electrically connected to said rotor; and
at least one welding seam,
wherein said bearing component is a bearing sleeve accommodating said shaft, and wherein a permanent electro-conductive connection is provided between said baseplate and said bearing sleeve of said bearing system through said welding seam.
11. A spindle motor comprising:
a baseplate;
a rotor;
a bearing system, said bearing system further comprising at least one component directly or indirectly electrically connected to said rotor;
a bore formed in said baseplate; and
at least one solid-state contact element,
wherein a permanent electro-conductive connection is provided between said baseplate and said bearing component of said bearing system through the exertion of mechanical forces by said solid-state contact element on at least one of said baseplate and said bearing component and wherein said solid-state contact element is accommodated entirely within said bore.
12. The spindle motor according to claim 11 , wherein said solid-state contact element is a spherical body.
13. The spindle motor according to claim 11 , wherein said solid-state contact element is a wire-shaped pin.
14. The spindle motor according to claim 11 , wherein said solid-state contact element is an elastic spring.
15. The spindle motor according to claim 11 , wherein said solid-state contact element is selected from the group consisting of a coil spring, a leaf spring and an annular spring.