Steering actuator of independent steer-by-wire system
First Claim
1. A steering actuator of an independent type steer-by-wire system comprising:
- a housing fixed to a vehicle body;
an ultrasonic motor having a stator internally fixed to said housing and a rotator rotating relative to said stator when an electric current is applied;
a steering rod having a first end and a second end, the steering rod penetrating through a center portion of said ultrasonic motor, the first end of said steering rod extending out of said housing for connection to a tie rod; and
a movement conversion means operably associated with said steering rod for converting rotating movement of said ultrasonic motor into linear movement of said steering rod, wherein said movement conversion means includes;
a rotator ring gear integrally and internally formed at said rotator of said ultrasonic motor;
a plurality of pinions each having a rotating shaft, said plurality of pinions being rotatably engaged with said rotator ring gear, said rotating shafts being fixed to said housing;
a plurality of worm gears integrally connected to said pinions; and
a plurality of racks formed at said steering rod so as to be engaged with said plurality of worm gears.
1 Assignment
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Accused Products
Abstract
A steering actuator of an independent type steer-by-wire system comprises a housing fixed to a vehicle body and an ultrasonic motor. The ultrasonic motor has a stator internally fixed to the housing and a rotator rotating relative to the stator when an electric current is applied. A steering rod having a first end and a second end penetrates through a center portion of the ultrasonic motor. The first end of the steering rod extends out of the housing for connection to a tie rod. In one embodiment, a ring gear, planetary gears, sun gear and/or racks formed at the steering rod are operably associated with converting rotating movement of the ultrasonic motor into linear movement of the steering rod. In another embodiment, a rotator ring, a plurality of pinions, worm gears and a plurality of racks formed at the steering rod are operably associated with converting rotating movement of the ultrasonic motor into linear movement of the steering rod.
27 Citations
3 Claims
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1. A steering actuator of an independent type steer-by-wire system comprising:
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a housing fixed to a vehicle body; an ultrasonic motor having a stator internally fixed to said housing and a rotator rotating relative to said stator when an electric current is applied; a steering rod having a first end and a second end, the steering rod penetrating through a center portion of said ultrasonic motor, the first end of said steering rod extending out of said housing for connection to a tie rod; and a movement conversion means operably associated with said steering rod for converting rotating movement of said ultrasonic motor into linear movement of said steering rod, wherein said movement conversion means includes; a rotator ring gear integrally and internally formed at said rotator of said ultrasonic motor; a plurality of pinions each having a rotating shaft, said plurality of pinions being rotatably engaged with said rotator ring gear, said rotating shafts being fixed to said housing; a plurality of worm gears integrally connected to said pinions; and a plurality of racks formed at said steering rod so as to be engaged with said plurality of worm gears. - View Dependent Claims (2, 3)
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Specification