Types of harmonic reducer gear drives

update:2022-08-09

abstract:The harmonic reducer has a series of advantages such as large transmission ratio, simple structure, ...

The harmonic reducer has a series of advantages such as large transmission ratio, simple structure, small volume, light weight and high precision. Harmonic gear transmission technology and devices are widely used in radar communications, industrial robots, precision machine tools, instrumentation, textile printing, precision optical equipment, medical equipment and other fields. So what are the types of harmonic drives and what are their classifications?

The electromagnetic coupling type flexible wheel deformation force is generated by electromagnetic coupling between the wave generator and the coil on the circumference of the flexible wheel by the uniform device. The mechanical connection type is to make the flexible wheel move by mechanical force.

The external wave generator has large structure size and large moment of inertia, so it is not suitable for high speed. When a fixed deformation wave generator is used, the internal type is generally used.

The end face harmonic gear transmission is a kind of space gearing type transmission, the axial dimension of this type of transmission is small, and the torsional rigidity of the flexible wheel is large. Radial harmonic gear drive belongs to the type of plane gearing and is currently the most widely used.

The wave number of the gear drive of the harmonic reducer refers to the number of cycles of the deformation of a certain point on the flexible wheel when the wave generator rotates one circle. The deformation of the flex wheel of the single-wave gear transmission is asymmetric, so the design requirements for the tooth profile and the cam profile of the wave generator are too high. The number of teeth of the flexible wheel and the rigid wheel of the double-wave gear transmission differs by 2. The structure is relatively simple and is the most commonly used. The three-wave alignment is good, and the eccentricity error is small, but the processing is complicated, and the number of repeated bending of the flexible wheel increases, so the fatigue life of the flexible wheel is relatively low. Generally rarely used.

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