Method for reducing drive eccentric errors of harmonic gear and automatic aligning wave generator

Abstract

The embodiment of the invention discloses a method for reducing drive eccentric errors of a harmonic gear and an automatic aligning wave generator. The automatic aligning wave generator comprises a turn plate driven by an input shaft and an elastic floating mechanism provided with two rollers. The elastic floating mechanism is flexibly arranged inside the turn plate in a sliding manner in the long axis direction of the automatic aligning wave generator. The elastic floating mechanism comprises two roller brackets symmetrically distributed relatively to the centre of the turn plate and an elastic element arranged between the roller brackets; the elastic element elastically resists against the two roller brackets, and the two rollers are respectively arranged on the two roller brackets, elastically resist against an inner circle of a flexible gear under the action of the elastic element and force the flexible gear to form an ellipse from a round shape, so that gear teeth of the flexible gear are tightly meshed with gear teeth of a rigid gear. The automatic aligning wave generator can reduce the eccentric errors caused by processing and assembling of parts, can remove the gear backlash between the gear teeth of the flexible gear and the gear teeth of the rigid gear and play an overload protection role.

Description

technical field [0001] The invention relates to the field of mechanical transmission, in particular to an automatic centering wave generator and a method for using the automatic centering wave generator to reduce the eccentric error of harmonic gear transmission. Background technique [0002] Harmonic gear transmission technology is a new type of transmission technology produced with the development of aerospace technology in the late 1950s. It uses the controllable wave deformation produced by flexible components to realize the transmission of motion and power. Compared with the traditional transmission mechanism, it has many unique advantages such as high motion precision, small hysteresis, small size, high bearing capacity, high transmission accuracy and high transmission efficiency, and has been successfully applied in the fields of space technology, instrumentation, robots, printing machinery and medical equipment. middle. At present, in the harmonic drive, the most wi...

AI Technical Summary

Problems solved by technology

[0004] Since the processing and assembly errors of each part of the harmonic gear transmission are unavoidable, the gear of the flex spline 91 and the gear of the rigid spline 92 have backlash and the geometric center of the flex spline and the rotation The eccentric error of the center seriously affects the transmission accuracy and dynamic performance of the harmonic gear transmission

Since the long-axis dimension of the wave generator 90' is fixed, it cannot eliminate the backlash and eccentricity errors caused by machining and assembly errors, and the gear teeth will be damaged when overloaded.

Therefore, if the harmonic gear transmission is to obtain high transmission accuracy, higher requirements must be placed on the machining accuracy of each part and the assembly accuracy of the transmission device, but a series of problems such as high cost and difficult process will arise.

At present, there is no wave generator that can eliminate the eccentricity error and tooth backlash of harmonic gear transmission at the same time, and can also protect against overload.

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