Precision Harmonic Reducers | High-Accuracy Gear Reduction Systems

A harmonic reducer mainly consists of three basic components: the wave generator, the flexspline, and the circular spline.

When the wave generator is inserted into the flexspline, it forces the cross-section of the flexspline to change from a circle to an ellipse. The teeth near the two ends of the major axis are fully meshed with the teeth of the circular spline, while the teeth near the two ends of the minor axis are completely disengaged from the circular spline. The teeth in other sections are in a transitional state between meshing and disengagement. As the wave generator rotates continuously, the deformation of the flexspline changes constantly, which in turn changes the meshing state between the flexspline and the circular spline. This realizes the slow rotation of the flexspline relative to the circular spline in the direction opposite to the wave generator, achieving the purpose of speed reduction.

• High Reduction Ratio: A high reduction ratio of 1/30 to 1/320 can be achieved with a single-stage coaxial configuration, and a high reduction ratio device can be realized with a simple structure.
  
• Small Backlash: Different from ordinary gear meshing, the backlash is extremely small, which is an important factor in the field of controllers.
• High Precision: Multiple teeth mesh simultaneously, and there are two sets of gears meshing symmetrically at 180 degrees. The impact of gear pitch error and cumulative pitch error on rotation accuracy is relatively averaged, resulting in extremely high positional accuracy and rotation accuracy.
• Few Components & Easy Installation: A high reduction ratio is achieved with three basic components, all of which are on the same axis, making the kit easy to install.
• Small Size & Light Weight: Compared with traditional gear devices, it has a volume of 1/3 and a weight of 1/2, while achieving the same torque capacity and reduction ratio.
• High Torque Capacity: Approximately 30% of the total number of teeth mesh simultaneously, and the contact is surface contact, which reduces the pressure on each gear and enables high torque capacity.
• High Efficiency: The sliding at the gear meshing part is very small, which reduces the power loss caused by friction. While achieving a high reduction ratio, it can maintain high efficiency.