{
  "abstract": "Provided is strain wave gearing (1), in which on a fastening surface between a boss (33) on an externally toothed gear (3) and a first end plate (8), formed are tapered fastening surfaces (331, 81), inclined with respect to an orthogonal plane that is orthogonal to a central axis (1a). Additionally, on a fastening surface between an internally toothed gear (2) and a second end plate (10), tapered fastening surfaces (21, 101) are formed. Due to engagement of the tapered fastening surfaces (331, 81) and engagement of the tapered fastening surfaces (21, 101), a firm fastening state can be formed, and radial-direction displacement of the first and second end plates (8, 10) that arises due to radial-direction load can be reduced. Decentering between a wave generator (4) and support bearings (7, 9) originating in the radial-direction displacement can be prevented or controlled, and the acting of unnecessary radial force on the wave generator (4) can be averted.",
  "assignees": [
    "HARMONIC DRIVE SYSTEMS"
  ],
  "authors": [
    "SHIROKOSHI NORIO"
  ],
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  "published_at": "2026-09-15T19:08:38.337829Z",
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  "source_date": "2026-03-18",
  "source_id": "EP-4711642-A1",
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  "supersedes": null,
  "title": "Component-tightening structure and strain wave gearing",
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