Double-flexible-wheel harmonic speed reducer with deformation capable of being limited

Abstract

A double-flexible-wheel harmonic speed reducer with deformation capable of being limited is characterized in that the double-flexible-wheel harmonic speed reducer with deformation capable of being limited comprises a strong flexible wheel, a weak flexible wheel, a wave generator and a strong flexible wheel deformation limiting component; the strong flexible wheel and the weak flexible wheel are coaxially and axially fixed and fixed in the radial direction and are provided with mutually-engaged teeth; the tooth number difference exists between the strong flexible wheel and the weak flexible wheel; through the wave generator, the weak flexible wheel generates non-circular elastic deformation and is engaged with part of the strong flexible wheel, and the part, making contact with the weak flexible wheel, of the strong flexible wheel is subjected to the radial pressure of the weak flexible wheel and generates non-circular elastic deformation; a limiting contact face is machined on the face, without teeth, of the flexible tubular wall of the strong flexible wheel, and the strong flexible wheel deformation limiting component and the strong flexible wheel are oppositely fixed; an annularlimiting face is machined on the strong flexible wheel deformation limiting component, and the limiting contact face of the deformation area, generated due to the radial pressure of the weak flexiblewheel, of the strong flexible wheel and the annular limiting face on the strong flexible wheel deformation limiting component are in contact.

Description

technical field [0001] The invention relates to the field of reducers, in particular to a double flexspline harmonic reducer with limitable deformation. Background technique [0002] Harmonic gear transmission was invented by American inventor C.W.Musser in 1955. It is a new type of transmission method that uses elastic deformation of flexible working components for motion or power transmission. It breaks through the rigid component mechanism of mechanical transmission. Mode, using a flexible component to achieve mechanical transmission, thus obtaining a series of special functions that other transmissions are difficult to achieve. Because the deformation process of the middle flexible member is basically a symmetrical harmonic, it gets its name. Except that the former Soviet Union called this kind of transmission wave transmission or flexible wheel transmission, the United States, Britain, Germany, Japan and other countries all call it "harmonic transmission". [0003] Th...

AI Technical Summary

Problems solved by technology

[0005] However, the hysteresis of the current harmonic reducer depends on the degree of meshing tightness between the teeth of the elliptical long axis and the teeth of the steel wheel after the elliptical deformation of the flexspline under the action of the wave generator. Yinghui will not be able to assemble or rotate difficult. Whether the flexible wheel and the steel wheel can be accurately meshed depends on the production accuracy of the harmonic reducer. Higher precision requirements increase the production cost and limit some relatively cheap materials and processing techniques. At the same time, the flexspline, steel wheel and wave generator will be worn to a certain extent during operation, and the wear will also cause the meshing tightness between the flexspline and the steel wheel to gradually decrease, and the hysteresis of the reducer will gradually increase. Large, which determines that the precision life of the reducer cannot be too long

Images