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Harmonic reducer is a kind of harmonic drive

update:2022-10-14
abstract:Why is the harmonic reducer called harmonic? First, we must understand what harmonic drive is, so as...
Why is the harmonic reducer called harmonic? First, we must understand what harmonic drive is, so as to know the source of the name of the harmonic reducer. The specific process is as follows:
Harmonic drive is the use of a controlled elastic deformation of a structure to achieve the transmission of mechanical motion. Harmonic drive usually consists of three basic components, including a rigid wheel with internal teeth, a flexible wheel with radial elastic deformation and external teeth that can be radially deformed during operation, and an elliptical, externally mounted flexible wheel. Ring wave generator with flexible rolling bearings.

The number of external teeth of the flexible wheel is less than the number of internal teeth of the rigid wheel. When the wave generator rotates, the outer teeth of the flexible wheel corresponding to the direction of the long axis are exactly meshed with the inner teeth of the rigid wheel; in the direction of the short axis, the outer teeth are completely separated from the inner teeth. When the rigid wheel is fixed and the wave generator rotates, the outer teeth of the flex wheel will mesh into and out of the inner teeth of the rigid wheel in turn, and the radial displacement of any point on the flex wheel ring gear will change approximately to a sinusoidal waveform , so this kind of drive is called harmonic drive.
Harmonic reducer is a kind of harmonic drive, which includes harmonic accelerator and harmonic reducer.
The harmonic reducer mainly includes: rigid wheel, flexible wheel and wave generator, all three are indispensable.
Among them, the number of teeth of the rigid wheel is slightly larger than that of the flexible wheel.

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