Sun gear shell assembly
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United States of America Patent
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-
May 13, 2003
Grant Date -
Oct 31, 2002
app pub date -
Apr 25, 2001
filing date -
Apr 25, 2001
priority date (Note) -
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Abstract
A sun gear shell assembly includes a cylindrical shell body formed by cold-rolling a low carbon steel, and a neck section having a protruding neck collar, formed by heat drawing and machining a middle carbon steel. A wall thickness of the shell body is increased for added strength. The neck has a 30 degree chamfer to prevent failures at the neck section, and the neck section is then welded to the shell body so that the sun gear shell becomes one piece. A plurality of holes are disposed in the neck section encircling the neck collar. An injection molded plastic washer including a plurality of tabs disposed on one side surface, has the tabs inserted into holes formed in the neck section to form the completed sun gear shell assembly.
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