The research on tooth profile optimization of point-line meshing gear is mainly realized through gear modification, which is similar to involute gear. The tooth profile optimization can effectively improve the gear meshing performance and load capacity. In the research of optimization of tooth profile modification of point and line meshing gears, Yang Fan has carried out research on the tooth profile modification method of point and line meshing gears. Based on the three elements of tooth profile modification (modification amount, modification curve, and modification height), he has defined the tooth profile modification parameters, established the geometric model and functional expression of tooth profile modification, and compared and analyzed the change of gear dynamic meshing force before and after tooth profile modification through examples, It is concluded that the tooth profile modification can significantly improve the meshing impact of the point-line meshing gear, and has an important role in reducing the meshing excitation of the point-line meshing gear.
Zhao Biao has carried out the research on the modification method and meshing characteristics of the point-line meshing gear, and carried out the research from the aspects of tooth surface mathematical model, tooth surface modification, contact stress analysis, meshing simulation and so on. It is concluded that reasonable tooth profile modification is conducive to reducing the amplitude of transmission error fluctuation and improving the stability of gear transmission; Tooth profile modification effectively solves the problem of gear tooth eccentric load; Correct the load position of the tooth surface to the middle of the gear teeth, and increase the gear load capacity and working life.
Liu Mengdie et al. carried out the research on the influence of tooth profile modification of point-line meshing gear on dynamic contact stress. The research results show that the contact stress of the gear is reduced after the modification, the load distribution coefficient of the tooth direction is reduced, and the meshing impact is significantly improved, which has a certain improvement effect on the meshing stability of the transmission system.
To sum up, tooth surface modification is still an important means to optimize the tooth profile of point-line meshing gears. Ideal tooth surface modification plays an important role in improving the bearing capacity of gears, reducing vibration noise and improving meshing performance. However, at present, the literature reviewed involves less research on the modification of point-line meshing gears, which indicates that the research in this area is not deep enough. In subsequent research, the tooth surface modification parameters should be incorporated into the dynamic characteristics study, Carry out the research on the influence of the modification on the dynamic characteristics, and further explore the influence of the modification on the meshing characteristics of the transmission system.