Shock absorbing type steering device for vehicles and method of producing the same
First Claim
1. A shock absorbing steering device comprising:
- a first column which is cylindrical-shaped;
a second column is cylindrical-shaped and is press fitted into an opening at one end of said first column; and
a shock absorber provided on an inner wall of said first column, said shock absorber including a first shock absorbing section having convex portions arranged on the inner wall with predetermined intervals in a circumferential direction of the column and a second shock absorbing section having convex portions arranged on the inner wall with predetermined intervals in a circumferential direction of the column;
wherein said first shock absorbing section is provided nearer to the opening of said first column than said second shock absorbing section, and an inside diameter of said first shock absorbing section is different from an inside diameter of said second shock absorbing section, andwherein said inside diameter of said first shock absorbing section is smaller than said inside diameter of said second shock absorbing section.
2 Assignments
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Accused Products
Abstract
A shock absorbing type steering device decreases variations in press fitting loads corresponding to a friction force between two columns. A shock can be appropriately absorbed by relative movements of the two columns in an axial direction. At least one of a first column and a second column press fitted into an opening at one end of the first column is formed with swaged parts on a peripheral wall thereof at a plurality of positions having intervals in a circumferential direction of the column, respectively at a plurality of positions having intervals in an axial direction of the column. Positions of tip ends of the swaged parts are different between a group of swaged parts near the opening at the end of the first column and other groups remote from the opening.
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Citations
10 Claims
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1. A shock absorbing steering device comprising:
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a first column which is cylindrical-shaped; a second column is cylindrical-shaped and is press fitted into an opening at one end of said first column; and a shock absorber provided on an inner wall of said first column, said shock absorber including a first shock absorbing section having convex portions arranged on the inner wall with predetermined intervals in a circumferential direction of the column and a second shock absorbing section having convex portions arranged on the inner wall with predetermined intervals in a circumferential direction of the column; wherein said first shock absorbing section is provided nearer to the opening of said first column than said second shock absorbing section, and an inside diameter of said first shock absorbing section is different from an inside diameter of said second shock absorbing section, and wherein said inside diameter of said first shock absorbing section is smaller than said inside diameter of said second shock absorbing section. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A shock absorbing steering device comprising:
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a first column which is cylindrical-shaped; a second column which is cylindrical-shaped and is press fitted into an opening at one end of said first column; and a shock absorber provided on an outer wall of said second column, said shock absorber including a first shock absorbing section having convex portions arranged on the outer wall with predetermined intervals in a circumferential direction of the second column and a second shock absorbing section having convex portions arranged on the outer wall with predetermined intervals in a circumferential direction of the second column; wherein said first shock absorbing section is provided in nearer to the opening of said first column than said second shock absorbing section, and an external diameter of said first shock absorbing section is different from an external diameter of said second shock absorbing section. - View Dependent Claims (8, 9, 10)
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Specification