Apparatus for limiting rotation of steering wheel

Patent metadata

Field	Value
Publication number	US-10895278-B2
Application number	US-201815902986-A
Country	US
Kind code	B2
Filing date	Feb 22, 2018
Priority date	Feb 23, 2017
Publication date	Jan 19, 2021
Grant date	Jan 19, 2021

Abstract

Provided is an apparatus for limiting rotation of a steering wheel, and more particularly, an apparatus for limiting rotation of a steering wheel, whereby a rotation angle of the steering wheel can be limited to a predetermined angle. The apparatus for limiting rotation of the steering wheel, installed in a steering system, includes: 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.

First claim

What is claimed is:

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.

Assignees

• Mando Corp

Inventors

• Kim Hosik
• Park Jungsik
• Kim Jeongrae
• Yeom Seulki

Classifications

• B62D5/001 Primary

  Mechanical components or aspects of steer-by-wire systems, not otherwise provided for in this maingroup · CPC title

• F16B33/002

  Means for preventing rotation of screw-threaded elements (F16B39/00 takes precedence) · CPC title

• F16B39/124 Primary

  with helically inclined mating surfaces · CPC title

• B62D5/005

  means for generating torque on steering wheel or input member, e.g. feedback · CPC title

• F16M2200/024

  by positive interaction, e.g. male-female connections · CPC title