Limit torque detecting device of harmonic reducer flexible wheel

Abstract

The invention relates to a limit torque detecting device of a harmonic reducer flexible wheel. The device comprises a bottom plate and a first shaft block, a second shaft block, a fixed rigid wheel and a third shaft block which are coaxially fixed on a floor, a flexible wheel is fixedly mounted on the third shaft block axially, the flexible wheel coaxially extends into the interior of the fixed rigid wheel and is meshed with teeth on the inner wall of the fixed rigid wheel; high speed shafts are rotatably mounted and penetrate through the middle portions of the first shaft block and the secondshaft block, and the ends of the high speed shafts extend into the inner side of the fixed rigid wheel and are rotatably cooperatively connected to the inner wall of the flexible wheel; the two sidesof the high speed shafts are symmetrically fixed with wing plates; a first hydraulic cylinder and a second hydraulic cylinder supporting the rotation of the wing plates are arranged on a base. The detecting device uses a destructive means to test the limit torque value of the flexible wheel and the elastic deformation and the plastic deformation limit rotation angle degree of the flexible wheel.

Description

technical field [0001] The invention belongs to the technical field of harmonic reducers, in particular to a limit torque detection device for a flexible wheel of a harmonic reducer. Background technique [0002] Harmonic reducers have the advantages of small size, light weight, stable transmission, no impact, no noise, high motion precision, large transmission ratio, high load capacity, etc., and have been widely used in electronics, aerospace, robotics and other industries. The harmonic reducer includes a rigid gear (rigid wheel) with an inner ring gear, a flexible gear (flex spline) with an outer ring gear and a wave generator. Among them, the flex spline is an important part of the harmonic generator. Its shape, structure and manufacturing materials affect the service life of the harmonic reducer, and when the harmonic reducer works for a long time, the meshing friction between the flex spline and the rigid spline , and the repeated deformation of the flexspline will ge...

AI Technical Summary

Problems solved by technology

Among them, the flex spline is an important part of the harmonic generator. Its shape, structure and manufacturing materials affect the service life of the harmonic reducer, and when the harmonic reducer works for a long time, the meshing friction between the flex spline and the rigid spline , and the repeated deformation of the flexspline will generate high heat. The above factors, combined with the increase in ambient temperature, will easily have an adverse effect on the stiffness of the flexspline.

[0003] The stiffness characteristics of the flexspline when the harmonic reducer is working are as follows: 1. The outer ring gear of the flexspline needs to be rigidly connected with the inner ring gear of the rigid wheel, so it needs to bear a large force. The flexspline here A certain rigidity must be guaranteed; 2. The bowl-shaped structure at the bottom of the flexspline needs to bear the deformation force transmitted to the flexspline by the harmonic generator, so the flexspline here must ensure a certain degree of toughness, but the connection between the above two places of the flexspline The location is very prone to problems such as stiffness decrease due to temperature rise and accelerated metal fatigue or even fracture. However, there is currently no detection device that specifically uses destructive methods to measure the ultimate torque performance of flexsplines.

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