Patent ID: 6422667
Filing Date: 2002-07-23
Classification: B62D,Y10T

Abstract:
A link-and-pin fixing structure for a traveling crawler chain of a vehicle, wherein:a fitting space having an annular opening, in which an elastic ring whose diameter of a section is D is to be fitted, is formed between an opening end portion of a pin-press-fit hole of a link and a press-fit end portion of a pin exposed in said opening end portion; a link inner wall of said fitting space is formed with an tapered inner-diameter face whose diameter gradually decreases as it goes toward an inmost of said fitting space such that said tapered inner-diameter face intersects an axial line of the pin at a predetermined angle &agr;; an outer peripheral face of an exposed end portion of the pin exposed in said fitting space is formed with an tapered outer-diameter face whose diameter gradually decreases as it goes toward the inmost of said fitting space such that said tapered outer-diameter face intersects the axial line of the pin at a predetermined angle &bgr;; said tapered inner-diameter face intersects an inner-diameter surface of said pin-press-fit hole at said angle &agr; via an inner annular face continuous to said tapered inner-diameter face, and said tapered outer-diameter face intersects said inner-diameter surface of said pin-press-fit hole at said angle &bgr; via an outer annular face continuous to said tapered outer-diameter face; and when dimensions of distances between each of contact points of the tapered inner-diameter face and the tapered outer-diameter face in said fitting space and a horizontal line passing a center of the section of said elastic ring are d1 and d2 respectively, said dimensions d1 and d2, the diameter D of the section of said elastic ring and said angles &agr; and &bgr; have a relation as follows; &agr;>&bgr;, D>d1+d2where d1=D/2Â·cos &agr;, d2=D/2Â·cos &bgr;.