Steer-by-wire type steering apparatus
The present invention provides steer-by-wire steering apparatuses that are capable of generating a counter force for improving steering feel with a simple structure and are particularly suitable for an autonomous vehicle by virtue of a reduced size.
1. A steer-by-wire steering apparatus comprising:
a fixed shaft mounted on a vehicle body;
a housing rotatably coupled to the fixed shaft;
a steering wheel coupled to the housing;
a motor for generating a counter force by applying a torque to the housing,
a sensor for measuring a steering angle of the steering wheel; and
an electronic control unit that is connected to the sensor and controls the motor.
2. The steer-by-wire steering apparatus according to claim 1 , wherein the fixed shaft comprises an edge that protrudes from the housing and is coupled to the vehicle body.
3. The steer-by-wire steering apparatus according to claim 1 , wherein the housing is coupled to the fixed shaft via a bearing.
4. The steer-by-wire steering apparatus according to claim 1 , wherein the steering wheel comprises a rim, one or more spokes and a base, and
wherein the housing is coupled to the base.
5. The steer-by-wire steering apparatus according to claim 1 , wherein the motor is coupled to the housing.
6. The steer-by-wire steering apparatus according to claim 1 , wherein the fixed shaft, the housing, the steering wheel, and the motor are integrally assembled to form a steering wheel module.
7. The steer-by-wire steering apparatus according to claim 1 , further comprising:
a first gear coaxially coupled to the fixed shaft; and
a second gear coupled to the housing by being engaged with the first gear and connected to the motor.
8. The steer-by-wire steering apparatus according to claim 7 , wherein the housing comprises a gear housing for accommodating the first gear and the second gear.
9. The steer-by-wire steering apparatus according to claim 8 , wherein the first gear and the gear housing are not supported by each other in a circumferential direction, and the second gear and the gear housing are supported by each other in the circumferential direction.
10. The steer-by-wire steering apparatus according to claim 8 , wherein the first gear is a worm wheel, and the second gear is a worm shaft.
11. The steer-by-wire steering apparatus according to claim 1 , wherein the sensor measures a rotation angle of the housing with respect to the fixed shaft.
12. The steer-by-wire steering apparatus according to claim 1 , wherein the housing comprises a cover housing for accommodating the sensor and the electronic control unit.