Gear, reduction gear combination and electric power steering apparatus
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United States of America Patent
Stats
-
Jan 24, 2006
Grant Date -
May 6, 2004
app pub date -
Jan 10, 2003
filing date -
Jan 11, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A worm 1 is composed of an annular tooth body 11 having a tooth 10 on the outer surface thereof, a core body 12 inserted inside the annular tooth body 11; and an elastic coupler 13, which can be transformed in the radial direction, for coupling the core body 12 with the annular tooth body 11. The worm 1 is engaged with the worm wheel with the elastic coupler 13 being transformed in the radial direction in such a manner that a negative amount of backlash is generated at the engagement portion. This can be also employed for the worm wheel. With a reduction gear combination having this structure, the backlash amount at the engagement portion can be adjusted to a proper amount without selecting elements such as the worm and the worm wheel to be assembled.
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