Spiral bevel gear tooth surface Ease-off modification design method based on minimum meshing impact

Abstract

The invention relates to a spiral bevel gear tooth surface Ease-off modification design method based on minimum meshing impact. According to the method, a small gear tooth surface completely conjugated with a large gear is derived according to a meshing principle, free Ease-off curved surface design is performed according to an inter-tooth gap and tooth surface normal gap generation principle, andthe free Ease-off curved surface design is superposed with a conjugated tooth surface to represent a small gear modification tooth surface. A spiral bevel gear meshing impact model considering gear tooth loading deformation is established; based on gear tooth TCA and LTCA technologies, the actual meshing point position and rigidity of meshing gear teeth are accurately calculated, the actual meshing point is obtained after a theoretical meshing point position vector of a driven wheel rotates by a small angle under a meshing coordinate system, and the theoretical meshing position is determinedby an intersection point of a geometric transmission error curve and a bearing transmission error curve. The minimum maximum meshing impact force and the minimum tooth surface maximum load are taken as optimization targets to obtain an optimal target modified tooth surface. According to the method, the meshing impact force is reduced while the strength is improved under the small adaptation amount, and a theoretical basis is provided for subsequent spiral bevel gear dynamic analysis.

Description

technical field [0001] The invention belongs to the technical field of gear transmission, and in particular relates to an Ease-off modification design method for the tooth surface of a spiral bevel gear based on the minimum meshing impact. Background technique [0002] Hypoid gears are widely used in vehicle main reducers. With the development of reducer gears in the direction of high speed and heavy load, strength, vibration and noise have become bottlenecks affecting product quality. When the gears mesh, the deformation and error of the gear teeth will cause the "base pitch error" of the contact tooth pair, which will cause the gear teeth to deviate from the theoretical meshing line at the meshing point and meshing point, and the speed will change suddenly and cause an out-of-line meshing impact. Off-line meshing shock is an important source of vibration and noise excitation. At present, the impact research is mainly carried out on involute cylindrical gears through analy...

AI Technical Summary

Problems solved by technology

At present, the Ease-off modified tooth surface is mainly used in the matching verification of the contact area under light load conditions, and the design of the free Ease-off modified tooth surface cannot be realized. Therefore, it is necessary to propose a helical Bevel gear Ease-off modified tooth surface design method for more accurate analysis of the dynamic performance of the transmission system

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