Belt speed reducing apparatus for electric power steering apparatus and electric power steering apparatus
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United States of America Patent
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Sep 22, 2009
Grant Date -
Jun 9, 2005
app pub date -
Oct 8, 2004
filing date -
May 6, 2003
priority date (Note) -
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Abstract
A belt speed reducing apparatus for an electric power steering apparatus includes a drive pulley having a first helical gear, a driven pulley having a second helical gear and a drive belt having a third helical gear in which a relationship of tan β<μ is established between a twist angle β of the respective helical gears and a friction coefficient μ between the first or the second helical gear and the third helical gear. Further, an electric power steering apparatus for adjusting a backlash between gears of a speed reducing apparatus brought in mesh with each other or adjusting a tension of a belt of a speed reducing apparatus.
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