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By integrating a lightweight wire race bearing structure with brazing or diffusion bonding, wave gear devices achieve a reduced weight and simplified design with improved precision and wear resistance, addressing the issues of weight and complexity in existing designs.

KR102991220B1Active Publication Date: 2026-07-21SBBTECH
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Patent Information

Application Number
KR1020240138321
Authority / Receiving Office
KR · KR
Patent Type
Patents
Current Assignee / Owner
Filing Date
2024-10-11
Publication Date
2026-07-21
Estimated Expiration
2044-10-11

AI Technical Summary

Technical Problem

Existing wave gear devices are heavy and complex, with cross roller bearings contributing to their weight and complexity, necessitating a more lightweight and simplified structure.

Method used

Implementing a lightweight wire race bearing structure with a bearing unit comprising a ring-shaped upper and lower housing, integrated through brazing or diffusion bonding, and using lightweight materials like aluminum or titanium alloys for the housings, along with a wire race that supports bearing balls in point contact.

Benefits of technology

The solution reduces the weight and simplifies the structure of wave gear devices while enhancing precision and wear resistance, minimizing vibration and allowing for a broader range of applications.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention relates to a wave gear device and a method for manufacturing the same. Specifically, it is a wave gear device and a method for manufacturing the same that lightens the wave gear device by applying a lightweight wire race bearing instead of a conventional cross roller bearing. The wave gear device includes an input shaft, a wave generator that rotates integrally with the input shaft, a flexible outer gear that is bent into a non-circular shape by the wave generator, a rigid inner gear that is partially engaged with the flexible outer gear, and a bearing unit that supports the rigid inner gear and the flexible outer gear in a state where they can rotate relative to each other.
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Citation Information

Patent Citations

  • Cross roller bearing, angular roller bearing, and method of manufacturing cross roller bearing and angular roller

    KR1020100095374A

  • Lightweight bearing manufacturing method

    JP2002339991A

  • Ball screw supporting bearing

    JP2003206936A

  • Strain wave gear device

    KR1020230000771A