Reducer of electric power steering apparatus
AssigneeMando Corporation
InventorsBong Sung Ko, Seong Yoon Kim, Seung Yong Pyo, Sung Jae Yoo
Life of this patent
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Abstract
A reducer of an electric power steering apparatus is disclosed. It reduces rattle noise generated by a backlash due to friction and wear of a worm and a worm wheel or an impact transmitted from a road surface through a wheel and a steering shaft and enhances a steering feeling of a driver by improving the catching phenomenon and rotational resistance generated between a worm shaft and a worm shaft bearing.
Claims15
A reducer of an electric power steering apparatus adapted to absorb vibrations and noise generated by friction and wear during operations of a worm shaft and a worm wheel, comprising:
- a pair of worm shaft bearings coupled respectively to opposite ends of a worm shaft and configured to support rotation of the worm shaft;
- a gear housing configured to accommodate a gear mechanism including the worm shaft, the worm shaft bearings, and the worm wheel;
- and
- a housing damper to one of the worm shaft bearings coupled to an end of the worm shaft opposite to a connecting portion of a motor shaft and an inner wall of the gear housing therebetween and configured to support an outer race of the worm shaft bearing with an axial resilient force,
- wherein the housing damper includes an inner surface defining a hole extending through the housing damper.
A reducer of an electric power steering apparatus adapted to absorb vibrations and noise generated by friction and wear during operations of a worm shaft and a worm wheel, comprising:
- a pair of worm shaft bearings coupled respectively to opposite ends of a worm shaft and configured to support rotation of the worm shaft;
- a gear housing configured to accommodate a gear mechanism including the worm shaft, the worm shaft bearings, and the worm wheel;
- and
- a plug damper coupled to one of the worm shaft bearings coupled to an end of the worm shaft on the side of a connecting portion of a motor shaft and a plug bolt coupled to the worm shaft therebetween and configured to support an outer race of the worm shaft bearing with an axial resilient force.
Dependencies are inferred from the claim text.