A flexible bearing torsional stiffness measurement device

Abstract

The invention relates to a measuring device for twisting rigidity of a flexible bearing. The measuring device is composed of a loading arm, a connecting flange, a special iron wheel, a wave generator, a mandrel, a deep trench ball bearing, a to-be-measured flexible bearing, an angular contact ball bearing, a support flange, a support panel, a locking plate, a support frame, a connecting panel, a pedestal, a magnetic gauge stand, and a dial indicator. After connection completion, an inner ring of the flexible bearing is fixed by the wave generator and is in an elliptical shape; two electronic tension meters apply forces on the loading arm to generate a twisting moment; the loading arm applies the twisting moment to an elliptical outer ring of the flexible bearing by the connecting flange and the special iron wheel, so that twisting deformation of the flexible bearing; and then the dial indicator measures the twisting deformation value. According to a formulated testing requirement, the tensile forces exerted on the two ends of the loading arm are changed and the twisting deformation values of the flexible bearing are measured under different torques, so that the twisting rigidity of the flexible bearing can be measured. Therefore, a reference basis can be provided for selecting a high-quality flexible bearing by a harmonic reducer manufacturing enterprise.

Description

technical field [0001] The invention relates to a device for measuring torsional stiffness of a flexible bearing. Background technique [0002] The flexible bearing is one of the core parts of the harmonic reducer and the robot joint. The structure of the flexible bearing is similar to the traditional deep groove ball bearing, but the ball diameter of the flexible bearing is small, the groove is shallow, the wall is extremely thin, and the inner hole is large, so the flexible bearing Large, able to adapt to the deformation of the flexible spline in the harmonic reducer. Harmonic reducers are widely used in the field of industrial robots and aviation, but there are high requirements for the transmission accuracy of harmonic reducers. The ball diameter of the flexible bearing is small and the wall is relatively thin. If the torsional rigidity is too poor, it will cause the output shaft to lag behind when the input shaft starts to rotate, resulting in a transmission error. At...

AI Technical Summary

Problems solved by technology

The ball diameter of the flexible bearing is small and the wall is relatively thin. If the torsional rigidity is too poor, it will cause the output shaft to lag behind when the input shaft starts to rotate, resulting in a transmission error.

At present, the research on the transmission accuracy of harmonic reducer at home and abroad has ignored the influence of the torsional stiffness of the flexible bearing, and it is in a blank stage in the measurement of the torsional stiffness of the flexible bearing.

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