汽车变速器传动齿轮对角修形量计算方法

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.

Computational Method of Bias of Gears in Automobile Transmission

Aiming at harsh and noise during the process of gearing in automobile transmission, from the view of gear geometry, a method to compute values of bias of helical gear pair is proposed. Meshing equations of driving surfaces satisfying the condition that the gear pair is instantaneously in tangent contact are built based on the principle of gear meshing. The problem of solving the equations is transformed to an optimization problem which is to guarantee the minimum normal distance between the meshing flanks and minimum deviation between the normal vectors. Then the values of bias are achieved. Meanwhile, the computation is verified by conducting the simulation experiments by using Masta. The simulation experiments suggest that, after the gear pair is modified with bias, the transmission error is reduced apparently and the distribution of load becomes more reasonable under the common working conditions.