1) With the increase of load from 1 N · m to 5 N · m, the area of engagement mark increases, the maximum bending stress of tooth root increases from 29.2 MPa to 128.6 MPa, and the maximum contact stress of tooth surface increases from 501.1 MPa to 1146.2 MPa. When the load is 1 N · m, the peak to peak value of transmission error is 3.2 × 10−5 rad。 When the load increases from 2 N · m to 5 N · m, the peak to peak value of transmission error increases from 2.3 × 10 − 5 rad increased to 5.1 × 10−5 rad。
2) With the axial installation error of the spiral bevel gear pinion from − 0.2 mm to 0.2 mm, the engagement mark moves towards the small end tooth top, and the included angle between the contact trace and the tooth root becomes larger. During standard installation, the transmission error and tooth surface contact stress are minimum; With the axial installation error of the spiral bevel gear big wheel from − 0.2 mm to 0.2 mm, the meshing mark moves towards the big end tooth root, and the transmission error increases. When the standard installation is performed, the contact stress on the tooth surface is the minimum; With the installation error of the shaft intersection angle from − 0.2 ° to 0.2 °, the meshing mark moves from the tooth root to the tooth top, and the bending stress of the tooth root increases.
3) The axial installation error of the positive spiral bevel gear pinion has a greater impact on the meshing characteristics of the spiral bevel gear pair. The axial installation error of the negative spiral bevel gear pinion has a greater impact on the tooth root bending stress and tooth surface contact stress, but has a smaller impact on the transmission error. The installation error of the shaft intersection angle, the axial installation error of the spiral bevel gear pinion and the axial installation error of the pinion have a greater impact on the meshing characteristics of the spiral bevel gear pair.