Wave gear device with three-dimensional tooth shape

By adopting a three-dimensional tooth shape gradually changing along the tooth line direction on the external and internal teeth of the wave gear device, the problem of difficulty in realizing three-dimensional meshing through cutting teeth processing in the prior art is solved, and the effect of three-dimensional meshing and avoiding tooth top interference is achieved.

CN116194685BActive Publication Date: 2025-03-25HARMONIC DRIVE SYST IND CO LTD
8 Cites 0 Cited by

Patent Information

Application Number
CN202080084966.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2020-10-30
Publication Date
2025-03-25
Estimated Expiration
2040-10-30

AI Technical Summary

Technical Problem

When the existing cup-type or top hat-type wave gear device achieves a three-dimensional meshing state, it is difficult to achieve tooth shapes such as tooth thickness, pressure angle, teeth, etc. along the tooth line direction as designed through cutting teeth processing.

Method used

A three-dimensional tooth shape gradually changes along the tooth direction of the outer teeth and the inner teeth. The specific implementation method is: the tooth shape of the inner teeth maintains a basic tooth shape from the outer end to the inner end in the tooth direction, and the other parts adapt to the amount of deflection of the outer teeth by proportionally reducing or enlarging the tooth shape, thereby avoiding tooth top interference.

Benefits of technology

Three-dimensional meshing is achieved in the entire tooth line direction without causing interference, and a three-dimensional tooth shape that is easy to perform tooth cutting processing is adopted, simplifying the processing process.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The three-dimensional tooth profile of the inner teeth (20) of the wave gear device (1) is a basic inner tooth profile (20(0)) at the inner tooth outer end (20a), and a reduced tooth profile obtained by proportionally reducing the basic inner tooth profile (20(0)) only in the lateral direction at other positions in the tooth line direction. The three-dimensional tooth profile of the outer teeth (3) is a basic outer tooth profile (30(0)) at the outer tooth outer end (30a), and an enlarged tooth profile obtained by proportionally enlarging the basic outer tooth profile (30(0)) only in the lateral direction at other positions in the tooth line direction. The tooth tip circle of the portion on the inner tooth inner end (20b) side of the inner teeth (20) is larger than the tooth tip circle of the other portions, so as not to interfere with the outer teeth (30). The following three-dimensional tooth shapes of external teeth (30) and internal teeth (20) can be realized: the external teeth (30) and the internal teeth (20) are three-dimensionally meshed, the two teeth will not interfere with each other on the inner end (20b) side of the internal teeth, and the gear cutting process is easy.
Need to check novelty before this filing date? Find Prior Art