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US 2003/0188917 A1Published application
Electric power steering device capable of reducing vibration of steering wheel
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsYasuo Shimizu, Katsuji Watanabe, Yoeru Kono
Life of this patent
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Abstract
The electric power steering device is disclosed such that the characteristic vibration of the rack shaft is adjusted by providing a hollow portion at the rack shaft, resulting in that the characteristic vibration of the rack shaft does not resonate with the vibration of the rack caused by the wheels and/or the motor.
Claims7
An electric power steering device comprising:
- a pinion shaft to which a steering torque is applied;
- a motor that provides said steering torque for assistance of said steering torque;
- a rack shaft having rack-teeth that mate with a pinion formed at said pinion shaft and that includes a hollow portion at inside of said rack shaft;
- wheels provided at both ends of said rack shaft and steered by converting motion of said rotation of said pinion shaft to motion of displacement in a direction of said rack shaft by way of mating of said pinion with said rack-teeth;
- a first supporting member that supports one end of said rack shaft and that is formed by mating said rack-teeth provided at said one end with said pinion provided at said pinion shaft;
- a second supporting member that supports the other end of said rack shaft;
- and
- a third supporting member that supports a portion between said one end and said the other end.
5 more elements
Dependencies are inferred from the claim text.