Harmonic reducerLSS series LS/LSN/LSG

Harmonic drive was invented by American inventor C.Walt Musser in mid-1950s
1. Composition of harmonic gearbox
harmonic gearbox has three basic components: a wave generator, a flexspline and a circular spline.
Wave generator: it is made up of a ball bearing and an elliptical cam. The wave generator is usually attached to the input end, the inner ring of the
bearing is fixed around the cam causing the outer ring of the bearing deforms to an elliptical shape.
Fexspline: it is an elastic thin-walled component with gear teeth on outer surface. It is usually fitted to output end.
Circular spline: it is a rigid steel ring with internal teeth. It usually has two more teeth than the flexspline, and generally mounted onto a housing.
2. Principle of harmonic gearbox
As a reducer, the harmonic gearbox is often in a status as: the wave generator drives, the circular spline is fixed, the flexspline is output end.
When the wave generator is put inside of the flexspline, the flexspline is forced into an elliptical shape causing the flexspline teeth to engage with the
tooth profile of the circular spline along the major axis of the ellipse, with the teeth completely disengaged across the minor axis of the ellipse.
The rotation of the wave generator makes the flexspline deform continuously, the teeth change operating state in the process of engagement and
disengagement, thus the motion transmission between wave generator and flexspline is realized.
3.Characteristics of harmonic gearbox
1.High accuracy: a good percentage of its teeth are meshed at all times, and are engaged at two zones 180 degrees apart. This means influences of
tooth pitch errors and accumulated pitch errors on rotational accuracy are neutralized, which assures high positional and rotational accuracy.
2.High speed reduction ratio: a harmonic gearbox has high single-stage reduction ratios of 1/30-1/500.Three basic components along same axle
without complex structures can provide high reduction ratios.
into contact with each other and because a good percentage of the teeth in the flexspline are engaged at all times.
3. High torque capacity. each tooth is subjected to a negligible amount of force yet provides a high torgue capacity because of the way the teeth come
4. Small-sized and light weight: while being less the size of conventional gearing mechanisms and less the weight, the harmonic gearbox provides the
same levels of torque and speed reduction ratios as its conventional counterparts enabling machinery and equipment to be made smaller and lighter.
5. Superior efficiency and long life time.
6. Quiet and