关键词: 斜齿托森差速器；啮合应力；螺旋角；压力角

Abstract: In order to reduce the fatigue risk of helical Torsen differential gear train, the influence of helical angle and pressure angle on gear meshing stress are investigated by finite element method. The simplified three-dimensional models of differential gear train with different helical angle and pressure angle are established, the mapped mesh method and frictionless contact behavior are adopted, and the static stress distribution of the gear train at different meshing positions are calculated. According to statistics, when the pressure angle remains unchanged and the helical angle increases, the maximum meshing stress of the gear train decreases from 564 MPa to 350 MPa. When the helical angle remains unchanged and the pressure angle increases, the maximum meshing stress of the wheel train decreases from 573 MPa to 478 MPa, so increasing the helical angle and pressure angle can reduce the meshing stress of the helical gear train of Torsen differential.

Key words: Helical gear Torsen differential; Meshing stress; Helical angle; Pressure angle