Herringbone Gear Pair With Constant Meshing Characteristics Constructed Tooth Pair

A herringbone gear pair with a constant meshing characteristics constructed tooth pair, comprising a herringbone gear I with a constructed tooth pair based on conjugate curves and a herringbone gear II with a constructed tooth pair based on conjugate curves, wherein a normal tooth profile curve Γs1 of the herringbone gear I with a constructed tooth pair and a normal tooth profile curve Γs2 of the herringbone gear II with a constructed tooth pair are continuous combined curves ΓL with the same curve shape, and the continuous combined curves ΓL comprise a combined curve ΓL1 of an odd power function curve and a tangent at an inflection point thereof, a combined curve ΓL2 of a sine function curve and a tangent at an inflection point thereof, a combined curve ΓL3 of an epicycloid function curve and a tangent at an inflection point thereof, a combined curve ΓL4 of an odd power function, a combined curve ΓL5 of a sine function, or a combined curve ΓL6 of an epicycloid function;

• the continuous combined curve is formed by two continuous curves, a connection point of the two continuous curves is an inflection point or a tangent point of the continuous combined curve, and a common normal at the inflection point or the tangent point of the continuous combined curve passes through a pitch point of the herringbone gear pair;
• and the normal tooth profile curves are swept along given conjugate curves to obtain tooth surfaces of the herringbone gear I with a constructed tooth pair and the herringbone gear II with a constructed tooth pair.