4 types and characteristics of harmonic reducer gears

Harmonic reducer gearThe application descriptions of the 4 major categories and characteristics are as follows, for reference.

1. Classification by deformation wave number:

a. Single-wave transmission.

The deformation of the flexspline of the single-wave gear transmission is asymmetrical, so the design requirements for the tooth profile and the cam profile of the wave generator are too high.

b. Double-wave transmission.

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 the most commonly used.

c. Three-wave transmission.

The three-wave alignment is good, the eccentricity error is small, but the processing is complicated, and the number of repeated bending of the flexspline increases, so the fatigue life of the flexspline is relatively low.Generally rarely used.

2. According to the configuration classification of the wave generator of the harmonic reducer relative to the flexible wheel:

a. External wave generator.

The external wave generator has a large structure and a large moment of inertia, so it is not suitable for high-speed applications.

b. Internal wave generator.

When a fixed deformation wave generator is used, the internal type is generally used.

3. Classified according to the principle of the flexible wheel and wave generator:

a. Mechanical connection type.

The mechanical connection type uses mechanical force to make the flexible wheel move.

b. Electromagnetic coupling type.

The deforming force of the electromagnetic coupling type flexspline is generated by the electromagnetic coupling between the wave generator and the even device on the coils on the circumference of the flexspline.

4. Classified according to transmission form:

a. Radial harmonic gear drive.

Radial harmonic gear transmission belongs to the plane toothing type and is currently the most widely used.

b. End face harmonic gear drive.

The end face harmonic gear drive is a type of spatial gearing. This type of drive has a small axial size and a large torsional rigidity of the flexspline.

c. Harmonic spiral drive.

The application of harmonic screw drive is mainly in the aspect of fine-tuning device, because it has high accuracy in the process of motion transmission, and the specific relationship of its transmission ratio can be in the harmonicgearIt is obtained on the basis of the transmission method, but it needs to be scientifically extended on the original method.

5. Features and applications of harmonic reducer gears:

a. It has the characteristics of simple structure, large transmission ratio, high precision, small size and light weight.

b. Harmonic gear transmission technology and devices are widely used in industrial robots, precision machine tools, radar communications, instrumentation, medical equipment, textile printing, precision optical equipment and other fields.