汽车变速器传动齿轮对角修形量计算方法

Computational Method of Bias of Gears in Automobile Transmission

针对汽车变速器齿轮传动中的振动及噪声问题,从齿轮几何学角度出发,提出了斜齿轮副对角修形量的计算方法.根据齿轮啮合原理,建立了斜齿轮副两啮合工作齿面满足任意瞬时连续相切接触条件的啮合方程,并将方程求解转化为两啮合齿面法向间距最小以及法向量偏差最小的优化问题,从而确定了对角修形量.同时,基于Masta仿真平台建立目标变速器的三维模型,并根据对角修形的参数对目标齿轮副的啮合性能进行仿真试验验证.仿真试验表明,变速箱主减速齿轮副对角修形后常用工况下的传动误差明显降低,齿面载荷分布更加合理.

Aiming at noise harshness reduction during the process of gearing in automobile transmission,from the view of gear geometry,a method to compute the magnitude of bias of helical gear pair was proposed.Meshing equations of driving surfaces,satisfying the condition that the gear pair is instantaneously in tangent contact,were built based on the principle of gear meshing.The problem of solving the equations was transformed to an optimization problem of guaranteeing the minimum normal distance between meshing flanks and minimum deviation between normal vectors.Then the magnitude of bias was achieved.Meanwhile,a model of the target transmission was built with Masta simulation platform,and the computation results were verified by conducting simulation experiments on the Masta.The simulation experiments indicate that,after the bias modification of gear pair,the transmission error is reduced apparently and the distribution of load becomes more reasonable under the common working conditions.