Parameter design method and system for instantaneous line contact intersecting axis variable tooth thickness gear pair

By constructing the normal section equation and normal vector of the forming rack, the non-involute variable tooth thickness gear is converted into an involute variable tooth thickness gear. The optimization model is used to optimize the parameters, and the design of the instantaneous line contact intersecting axis variable tooth thickness gear pair is realized, which improves the tooth surface utilization and load-bearing capacity and extends the service life.

CN119940013BActive Publication Date: 2025-10-03CENT SOUTH UNIV
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Patent Information

Application Number
CN202510035271.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-01-09
Publication Date
2025-10-03
Estimated Expiration
2045-01-09

AI Technical Summary

Technical Problem

In the existing technology, involute variable tooth thickness gear pairs can only achieve instantaneous point contact in situations with small shaft intersection angles, resulting in low tooth surface utilization and insufficient load-bearing capacity. In addition, non-involute variable tooth thickness gears have problems with parametric expression and tooth surface processing.

Method used

By constructing the normal section equation and normal vector of the forming rack, the tooth surface of the non-involute variable tooth thickness gear is converted into the tooth surface of the involute variable tooth thickness gear. The optimization model is used to optimize the parameters and realize the design of the instantaneous line contact intersecting axis variable tooth thickness gear pair.

Benefits of technology

The tooth surface utilization and load-bearing capacity of variable tooth thickness gears are improved, the service life is extended, and the parameter design problem is solved.

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Abstract

The present application discloses a parameter design method and system for an instantaneous line contact intersecting axis variable tooth thickness gear pair. The method obtains the tooth surface equation and normal vector of a non-involute variable tooth thickness gear based on the tooth surface equation of the involute variable tooth thickness gear and the normal vector of the involute variable tooth thickness gear. The method also obtains the comprehensive modified tooth surface equation of the involute variable tooth thickness gear based on the tooth surface equation of the involute variable tooth thickness gear. The method obtains the normal deviation between the involute variable tooth thickness gear and the non-involute variable tooth thickness gear based on the comprehensive modified tooth surface equation of the involute variable tooth thickness gear, the tooth surface equation of the non-involute variable tooth thickness gear, and the normal vector of the non-involute variable tooth thickness gear. An optimization model is constructed based on the normal deviation. The parameters of the involute variable tooth thickness gear are optimized to obtain the target parameters of the involute variable tooth thickness gear. The present application can realize the parameter optimization design of an instantaneous line contact intersecting axis variable tooth thickness gear pair and improve the tooth surface utilization rate of the variable tooth thickness gear.
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