DUAL HARMONIC GEAR DRIVE Russian patent published in 2018 - IPC F16H1/32 

FIELD: machine building.

SUBSTANCE: invention relates to harmonic gear drives. Harmonic gear drive (1) contains two rigid internal engagement gears (2, 3), a flexible external engagement gear (4) and waves generator (5). Gear (1) wheel (4) is equipped with first and second outer teeth (7, 8). Number of teeth (7) and (8) is different. Wheel (4) is bent with ellipsoidal form production by the waves generator. When the radial bending theoretical values (d₁, d₂) at the first and second outer teeth (7, 8) major axis positions bent with the ellipsoidal shape production, are expressed by the relations d₁=m₁n₁ and d₂=m₂n₂, radial bending values (d_1a, d_2a) of the first and second outer teeth (7, 8) bent by the waves generator (5) satisfy the relations d_1a=ωd₁ and d_2a=ωd₂, where 1.25≤ω≤3. At that, m₁ and m₂ are the first and second outer teeth modules, and n₁ and n₂ are positive integers. At that, double harmonic gear drive can be produced, in which having the different number of teeth first and second outer teeth, can be correspondingly bent to form excellent mating with internal engagement gear wheels.

EFFECT: increase in the service life is achieved.

8 cl, 6 dwg