Patent ID: 11946536
Assignee: HARMONIC DRIVE SYSTEMS INC.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 1:
2. The strain wave gearing according to claim 1,
wherein each of the basic internal-teeth tooth profile and the basic external-teeth tooth profile is provided with:
a meshing tooth land portion that meshes with tooth lands of the counterpart gear;
a tooth-tip-side tooth land portion that extends from an addendum-side end of the meshing tooth land portion to a tooth-tip top part and that does not relate to meshing; and
a root-side tooth land portion that extends from a dedendum-side end of the meshing tooth land portion to a root deepest part and that does not relate to meshing, and
wherein a tooth profile curve defining the meshing tooth land portion is an involute curve, or is a similar curve obtained through similarity transformation of part of a movement curve obtained when meshing of the external teeth with the internal teeth at the position of the reference cross-section is approximated as rack meshing.