Importance

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Abstract

According to the present invention, an asymmetric elliptical chain gear (10) is characterized by having a shape formed by a combination of: a first ellipse (1) the major axis of which is located on the X-axis of a vertical coordinate system and the minor axis of which is located on the Y-axis of the vertical coordinate system; a first straight line (3) which is perpendicular to the minor axis, and which intersects the first ellipse (1); and a second ellipse (2) which exists on the first straight line (3) and which passes first inflection points (A, A′) that form a fixed angle (a) with respect to the minor axis in the clockwise direction, and which contacts ellipse contact points (B, B′) on the first ellipse (1) that are located at points forming a fixed angle (b) in the clockwise direction. The asymmetric elliptical chain gear (10) of the present invention has a shape formed by a combination of a straight line section ranging from a second reflection point (C), which is a cross point between the first straight line (3) and the first ellipse (1), to the first inflection point (A); a second ellipse section ranging from the first inflection point (A) to the ellipse contact point (B); and a first ellipse section ranging from the ellipse contact point (B) to the second inflection point (C′).

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First Claim