Novel tooth-shaped harmonic reducer, transmission mechanism and tooth-shaped design method of novel tooth-shaped harmonic reducer

By designing a new tooth shape in the gear transmission structure, using the envelope principle and conjugation equation, the manufacturing difficulty and accuracy of the existing gear transmission structure under high load and large transmission ratio are solved, and efficient meshing and high-precision transmission are achieved.

CN119664872APending Publication Date: 2025-03-21WENZHOU UNIV
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Patent Information

Application Number
CN202411829180.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-12
Publication Date
2025-03-21

AI Technical Summary

Technical Problem

The existing gear transmission structure is difficult to manufacture under high load and large transmission ratio, has large volume and has a tooth-side backlash, which affects the transmission accuracy.

Method used

By designing a new tooth shape, the gear envelope principle and conjugation equation can be used to achieve efficient meshing transmission of the gear. The specific steps include taking points on the fixed coordinate system, performing coordinate transformation, equidistant offset and conjugated tooth profile calculations, and obtaining the actual tooth shape and conjugated tooth shape.

Benefits of technology

It realizes efficient meshing transmission, with a fixed transmission ratio, pure rolling tooth surface, high transmission efficiency, small wear, long life, stable transmission, high accuracy, and simple processing and manufacturing.

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Abstract

The invention discloses a novel tooth-shaped harmonic reducer, a transmission mechanism and a tooth-shaped design method. On the basis of the gear enveloping principle, points are taken from different coordinate systems, and the tooth profile is determined through coordinate transformation, equidistant offset and conjugate equation calculation. The method comprises the steps of taking points in a rigid gear fixed coordinate system, obtaining a flexible gear theoretical tooth profile through specific matrix transformation, and obtaining a rigid gear tooth profile through transformation after offset; points are taken from a flexible gear coordinate system for similar operation to obtain a tooth shape; points are taken based on a rigid gear fixed coordinate system, the complete tooth shape of the flexible gear is obtained firstly, and then the tooth shape of the rigid gear is determined; a known arc line is combined with a rigid wheel fixed coordinate system to take points to design a tooth profile; points are taken from a flexible gear coordinate system, and the tooth profile is determined by combining specific parameters. The harmonic precision gear transmission mechanism comprises a flexible gear, a rigid gear and other components, the tooth shape of the flexible gear is determined according to the method and conjugated with the tooth shape of the rigid gear, power transmission is achieved through a cam and other components, and the transmission ratio is related to the tooth number. Different requirements can be met, the transmission efficiency, bearing capacity and precision of the speed reducer are improved, and the speed reducer is suitable for equipment with high transmission precision requirements.
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