Low power spindle motor with a fixed shaft
AssigneeMinebea Co., Ltd.
InventorAndreas Kull
Life of this patent
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Abstract
A spindle motor for use in a disk drive having a base frame, a housing cover, a fixed shaft and a rotatable bearing sleeve. The fixed shaft has a larger diameter section and a smaller diameter section with a step formed therebetween. The rotatable bearing sleeve has a central cylindrical opening, the shaft being inserted into the central cylindrical opening. A bearing gap is formed between the fixed shaft and the rotatable bearing sleeve, the bearing gap being filled with lubricating fluid. One end of the fixed shaft is secured to the base frame while another end of the shaft is secured to the housing cover.
Claims14
A spindle motor for use in a disk drive comprising:
- a fixed shaft having a larger diameter section and a smaller diameter section with a step formed therebetween;
- a rotatable bearing sleeve having a central cylindrical opening, said shaft being inserted into said central cylindrical opening;
- a bearing gap formed between said fixed shaft and said rotatable bearing sleeve, said bearing gap being filled with lubricating fluid;
- a base frame;
- and
- a housing cover,
- wherein one end of said fixed shaft is secured to the base frame while another end of said fixed shaft is secured to the housing cover.
A spindle motor for use in a disk drive comprising:
- a fixed shaft having a larger diameter section and a smaller diameter section with a step formed therebetween;
- a bearing sleeve having a central cylindrical opening, said shaft being inserted into said central cylindrical opening;
- a bearing gap formed between said shaft and said bearing sleeve, said bearing gap being filled with lubricating fluid;
- a thrust plate fixedly mounted on said shaft in the area of said step;
- a base frame;
- and
- a housing cover,
- wherein one end of said fixed shaft is secured to the base frame while another end of said fixed shaft is secured to the housing cover.
Dependencies are inferred from the claim text.