US 12,352,347 B2Granted

External meshing cylindrical gear pair with constant meshing characteristics constructed tooth pair

AssigneesChongqing University, Chongqing Yisilun Technology Co., Ltd.

InventorsBingkui Chen, Zhongtao Li, Luhe Zhang, Wenjun Luo, Yonghong Chen, Chaoyang Li, Changyan Peng

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Abstract

Provided is an external meshing cylindrical gear pair with a constant meshing characteristics constructed tooth pair. The external meshing cylindrical gear pair with a constructed tooth pair includes a cylindrical gear I with a constructed tooth pair and a cylindrical gear II with a constructed tooth pair based on conjugate curves. In the present disclosure, normal tooth profile curves of the cylindrical gear I with a constructed tooth pair and the cylindrical gear II with a constructed tooth pair are continuous combined curves with the same curve shape, which facilitates machining by the same cutter. A common normal at an inflection point or a tangent point of the continuous combined curve passes through a pitch point of the gear pair, and a position of the inflection point or the tangent point can be adjusted according to an actual demand. A contact ratio is designed as an integer.

Claims20

Dependent claims

An external meshing cylindrical gear pair with a constant meshing characteristics constructed tooth pair, comprising a cylindrical gear I with a constructed tooth pair and a cylindrical gear II with a constructed tooth pair as a pair based on conjugate curves, wherein a normal tooth profile curve Γs1 of the cylindrical gear I with a constructed tooth pair and a normal tooth profile curve Γs2 of the cylindrical gear II with a constructed tooth pair are continuous combined curves ΓL with the same curve shape, and the continuous combined curve ΓL is 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 ΓL 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 ΓL, and the inflection point or the tangent point of the continuous combined curve ΓL is a designated point located on a meshing force action line of the external meshing cylindrical gear pair with a constant meshing characteristics constructed tooth pair;
the normal tooth profile curve Γs1 of the cylindrical gear I with a constructed tooth pair is swept along given conjugate curves to obtain a tooth surface of the cylindrical gear I with a constructed tooth pair, and the normal tooth profile curve Γs2 of the cylindrical gear II with a constructed tooth pair is swept along the given conjugate curves to obtain a tooth surface of the cylindrical gear II with a constructed tooth pair.

Dependencies are inferred from the claim text.