Steering shaft modifier

Abstract

There is provided a steering shaft modifier, capable of fundamentally preventing distortion generated in a new steering shaft, being easing aligned, and being simply assembled, including: a frame having a steering shaft penetrating portion formed in a front surface thereof and having a contact surface covering a portion of the steering head and disposed to be in contact with an upper bearing installation portion of a steering shaft installation portion; a shaft including a head portion caught by a lower bearing installation portion of the steering shaft installation portion of the steering head, a body portion passing through the steering shaft installation portion, and a connection portion connected to the frame; and a frame block including a lower contact surface tightly attached to a lower surface of the steering head in the rear of the lower bearing installation portion and coupled to the frame when installed.

What is claimed is: 
     
       1. A steering shaft modifier installed in a steering head of a motorcycle to modify a steering shaft, the steering shaft modifier comprising:
 a steering shaft penetration portion having a through hole and formed as a single part; and 
 a frame covering at least a portion of a front surface of the steering head, 
 wherein the frame is fixed to a steering shaft installation portion of the steering head, 
 the frame comprises an upper block extending from an upper portion of the steering shaft penetrating penetration portion, the upper block having a coupling hole formed therein, and wherein the coupling hole mounts a shaft coupling part which is inserted to the steering shaft installation portion; and,  
 the steering shaft penetration portion has upper and lower bearing insertion portionsand, and  
 the steering shaft penetration portion is positioned such that extends along a first axis, and the steering shaft installation portion extends in a second axis that intersects with the first axis at a reference point, wherein a first distance between the reference point and the lower bearing insertion portion of the steering shaft penetration portion is higher shorter than a second distance between the reference point and a lower bearing installation portion of the steering shaft installation portion. 
 
     
     
       2. The steering shaft modifier of  claim 1 , further comprising wing portions connected to the steering shaft penetration portion and extending to either lateral surface of the steering head to cover both lateral side sides of the steering head. 
     
     
       3. The steering shaft modifier of  claim 2 , wherein the through hole of the steering shaft penetrating penetration portion is sloped toward the steering shaft. 
     
     
       4. The steering shaft modifier of  claim 1 , wherein the shaft coupling part comprises a sloped contact surface in the length direction of the shaft coupling part, which contacts a an upper bearing installation portion of the steering shaft installation portion of the steering head, whereby the frame is fixed to the steering head. 
     
     
       5. A steering shaft modifier installed in a steering head of a motorcycle to modify a steering shaft, the steering shaft modifier comprising:
 a steering shaft penetration portion having a through hole and formed as a single part; and   a frame covering at least a portion of a front surface of the steering head,   wherein the frame is fixed to a steering shaft installation portion of the steering head, the frame comprises an upper block extending from an upper portion of the steering shaft penetration portion, the upper block having a coupling hole formed therein, and wherein the coupling hole mounts a part which is at least partially inserted to the steering shaft installation portion; and the steering shaft penetration portion has upper and lower bearing insertion portions, and the steering shaft penetration portion is positioned such that the lower bearing insertion portion of the steering shaft penetration portion is higher than a lower bearing installation portion of the steering shaft installation portion, a lower end of the lower bearing insertion portion of the steering shaft penetration portion being spaced apart from an upper end of the lower bearing installation portion of the steering shaft installation portion in an upwardly-extending direction of the steering shaft installation portion.   
     
     
       6. The steering shaft modifier of claim 5, further comprising wing portions connected to the steering shaft penetration portion and extending to either lateral surface of the steering head to cover both lateral sides of the steering head. 
     
     
       7. The steering shaft modifier of claim 6, wherein the through hole of the steering shaft penetration portion is sloped toward the steering shaft. 
     
     
       8. The steering shaft modifier of claim 5, wherein the part includes a sloped contact surface in the length direction of the part, which contacts the steering shaft installation portion of the steering head, whereby the frame is fixed the steering head. 
     
     
       9. The steering shaft modifier of claim 5, wherein the part has a shape corresponding to a shape of the coupling hole of the frame. 
     
     
       10. The steering shaft modifier of claim 5, wherein the part includes a shaft coupling part. 
     
     
       11. A steering shaft modifier installed in a steering head of a motorcycle to modify a steering shaft, the steering shaft modifier comprising:
 a steering shaft penetration portion having a through hole; and   a frame formed integrally with the steering shaft penetration portion and configured to cover at least a portion of a front surface of the steering head,   wherein the frame is fixed to a steering shaft installation portion of the steering head, the frame comprises an upper block extending from an upper portion of the steering shaft penetration portion, the upper block having a coupling hole formed therein, and wherein the coupling hole mounts a part which is mounted to the steering shaft installation portion; and the steering shaft penetration portion has upper and lower bearing insertion portions, and the steering shaft penetration portion is positioned such that the lower bearing insertion portion of the steering shaft penetration portion is higher than a lower bearing installation portion of the steering shaft installation portion, the steering shaft penetration portion having a length shorter than the steering shaft installation portion.   
     
     
       12. The steering shaft modifier of claim 11, wherein the part includes a sloped contact surface in the length direction of the part, which contacts the steering shaft installation portion of the steering head, whereby the frame is fixed the steering head. 
     
     
       13. The steering shaft modifier of claim 11, wherein the part has a shape corresponding to a shape of the coupling hole of the frame. 
     
     
       14. The steering shaft modifier of claim 11, wherein the part includes a shaft coupling part. 
     
     
       15. A two-wheeled vehicle comprising:
 a steering shaft;   a steering head;   a steering shaft modifier configured to be installed in the steering head, the steering shaft including:
 a steering shaft penetration portion having a through hole and formed as a single part; and 
 a frame covering at least a portion of a front surface of the steering head, 
 wherein the frame is fixed to a steering shaft installation portion of the steering head, the frame comprises an upper block extending from an upper portion of the steering shaft penetration portion, the upper block having a coupling hole formed therein, and wherein the coupling hole mounts a part which is at least partially inserted to the steering shaft installation portion; and the steering shaft penetration portion has upper and lower bearing insertion portions, and 
 wherein the steering shaft penetration portion extends along a first axis, and the steering shaft installation portion extends in a second axis that intersects with the first axis at a reference point, wherein a first distance between the reference point and the lower bearing insertion portion of the steering shaft penetration portion is shorter than a second distance between the reference point and a lower bearing installation portion of the steering shaft installation portion. 
   
     
     
       16. The two-wheeled vehicle of claim 15, further comprising wing portions connected to the steering shaft penetration portion and extending to either lateral surface of the steering head to cover both lateral sides of the steering head. 
     
     
       17. The two-wheeled vehicle of claim 16, wherein the through hole of the steering shaft penetration portion is sloped toward the steering shaft. 
     
     
       18. The two-wheeled vehicle of claim 15, wherein the part includes a sloped contact surface in the length direction of the part, which contacts the steering shaft installation portion of the steering head, whereby the frame is fixed the steering head. 
     
     
       19. The two-wheeled vehicle of claim 15, wherein the part has a shape corresponding to a shape of the coupling hole of the frame. 
     
     
       20. The two-wheeled vehicle of claim 15, wherein the part includes a shaft coupling part. 
     
     
       21. A steering shaft modifier installed in a steering head of a motorcycle to modify a steering shaft, the steering shaft modifier comprising:
 a steering shaft penetration portion having a through hole; and   a frame formed integrally with the steering shaft penetration portion and configured to cover at least a portion of a front surface of the steering head,   wherein the frame is fixed to a steering shaft installation portion of the steering head,   the frame comprises an upper block extending from an upper portion of the steering shaft penetration portion, the upper block having a coupling hole formed therein, and wherein the coupling hole mounts a part which is mounted to the steering shaft installation portion; and   the steering shaft penetration portion has upper and lower bearing insertion portions, and the steering shaft penetration portion extends along a first axis, and the steering shaft installation portion extends in a second axis that intersects with the first axis at a reference point, wherein a first distance between the reference point and the lower bearing insertion portion of the steering shaft penetration portion is shorter than a second distance between the reference point and a lower bearing installation portion of the steering shaft installation portion.   
     
     
       22. The steering shaft modifier of claim 21, wherein the part includes a sloped contact surface in the length direction of the part, which contacts the steering shaft installation portion of the steering head, whereby the frame is fixed the steering head. 
     
     
       23. The steering shaft modifier of claim 22, wherein the part has a shape corresponding to a shape of the coupling hole of the frame. 
     
     
       24. The steering shaft modifier of claim 23, wherein the part includes a shaft coupling part.