Small size fan
First Claim
Patent Images
1. A bearing arrangement for the shaft of an axial flow small compact sized fan comprising:
- a central driving motor for the fan which has a shaft which drives an impeller of the fan;
a bearing unit means for said shaft;
said bearing unit means contacting and supporting said shaft in a radial direction as concerns the rotation of the shaft;
a bearing support tube means located radially outward of the bearing unit means and supporting said bearing unit means in a radial direction as concerns the rotation axis of the shaft;
a flow duct surrounding the impeller and having a flange means extending inwardly from adjacent the outer edge of the flow duct;
the bearing support tube means having a first shoulder portion;
a closure means having a second shoulder portion;
the bearing unit means being braced between the first and second shoulder portions; and
the closure means being supported by said flange means.
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Accused Products
Abstract
A bearing assembly for a small compact sized fan is provided which can utilize either a sintered bearing or a roller bearing, and which provides several embodiments for positioning the bearings in a radial and axial direction. The invention utilizes a bearing support tube for constraining the bearing in radial direction and an end cover cap attached to a flange of the fan duct to retain the bearings in an axial direction.
84 Citations
35 Claims
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1. A bearing arrangement for the shaft of an axial flow small compact sized fan comprising:
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a central driving motor for the fan which has a shaft which drives an impeller of the fan; a bearing unit means for said shaft; said bearing unit means contacting and supporting said shaft in a radial direction as concerns the rotation of the shaft; a bearing support tube means located radially outward of the bearing unit means and supporting said bearing unit means in a radial direction as concerns the rotation axis of the shaft; a flow duct surrounding the impeller and having a flange means extending inwardly from adjacent the outer edge of the flow duct; the bearing support tube means having a first shoulder portion; a closure means having a second shoulder portion; the bearing unit means being braced between the first and second shoulder portions; and the closure means being supported by said flange means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification