Apparatus for limiting rotation of steering wheel

1. An apparatus for limiting rotation of a steering wheel, which is installed in a steering system, comprising:

an end-stopper disposed inside a housing through which a steering shaft on which the steering wheel is installed, passes, and the end-stopper limiting a rotation angle of the steering wheel to a predetermined angle; and

a stopping guide configured to restrain rotation of the nut,

wherein the end-stopper comprises: a lead screw coupled to an end of the steering shaft, a pair of stoppers installed on both ends of the lead screw, and a nut passed through by the lead screw and disposed between the pair of stoppers, and

wherein the nut comprises: a chamfered portion being in surface contact with the stopping guide, a mounting portion recessed in the chamfered portion, and an elastic member inserted into the mounting portion.

2. The apparatus of claim 1 , wherein the elastic member protrudes from the chamfered portion at a predetermined interval.

3. The apparatus of claim 1 , wherein the stopper comprises a stopper stopping jaw projecting toward the nut.

4. The apparatus of claim 3 , wherein the nut comprises a nut stopping jaw protruding toward the stopper on both sides thereof.

5. The apparatus of claim 4 , wherein, when the stopper stopping jaw and the nut stopping jaw are in contact with each other, rotation of the steering wheel is limited.

6. The apparatus of claim 1 , wherein the nut is disposed at a midpoint of the lead screw on the basis of a state in which the steering wheel has a rotation angle of 0 degrees, and when the steering wheel is rotated clockwise within a predetermined angle in the state in which the steering wheel has the rotation angle of 0 degrees, the nut comes into close contact with the stopper on one side, and when the steering wheel is rotated counterclockwise within a predetermined angle in the state in which the steering wheel has the rotation angle of 0 degrees, the nut comes into close contact with the stopper on the other side.

7. The apparatus of claim 1 , wherein the nut comprises a guide groove formed on one side of an outer circumferential surface of the nut and further comprises a rotation preventing member at least a portion of which is inserted into the guide groove and which restrains rotation of the nut.

8. The apparatus of claim 7 , wherein the rotation preventing member comprises a guide pin having one side fixed to the housing and the other side inserted into the guide groove.

9. The apparatus of claim 8 , wherein the guide groove has a U-shape along a direction toward the steering shaft on one side of the outer circumferential surface of the nut.

10. An apparatus for limiting rotation of a steering wheel, which is installed in a steering system, comprising:

an end-stopper disposed inside a housing through which a steering shaft on which the steering wheel is installed, passes, and the end-stopper limiting a rotation angle of the steering wheel to a predetermined angle,

wherein the end-stopper comprises: a lead screw coupled to an end of the steering shaft, a pair of stoppers installed on both ends of the lead screw, and a nut passed through by the lead screw and disposed between the pair of stoppers, and

wherein the nut comprises a guide groove formed on one side of an outer circumferential surface of the nut and further comprises a rotation preventing member at least a portion of which is inserted into the guide groove and which restrains rotation of the nut.

11. The apparatus of claim 10 , further comprising a stopping guide configured to restrain rotation of the nut.

12. The apparatus of claim 11 , wherein the nut comprises:

a chamfered portion being in surface contact with the stopping guide;

a mounting portion recessed in the chamfered portion; and

an elastic member inserted into the mounting portion.

13. The apparatus of claim 12 , wherein the elastic member protrudes from the chamfered portion at a predetermined interval.

14. The apparatus of claim 10 , wherein the stopper comprises a stopper stopping jaw projecting toward the nut.

15. The apparatus of claim 14 , wherein the nut comprises a nut stopping jaw protruding toward the stopper on both sides thereof.

16. The apparatus of claim 15 , wherein, when the stopper stopping jaw and the nut stopping jaw are in contact with each other, rotation of the steering wheel is limited.

17. The apparatus of claim 10 , wherein the nut is disposed at a midpoint of the lead screw on the basis of a state in which the steering wheel has a rotation angle of 0 degrees, and when the steering wheel is rotated clockwise within a predetermined angle in the state in which the steering wheel has the rotation angle of 0 degrees, the nut comes into close contact with the stopper on one side, and when the steering wheel is rotated counterclockwise within a predetermined angle in the state in which the steering wheel has the rotation angle of 0 degrees, the nut comes into close contact with the stopper on the other side.

18. The apparatus of claim 10 , wherein the rotation preventing member comprises a guide pin having one side fixed to the housing and the other side inserted into the guide groove.

19. The apparatus of claim 18 , wherein the guide groove has a U-shape along a direction toward the steering shaft on one side of the outer circumferential surface of the nut.