Experiment table and method for testing transmission errors of high-speed-ratio high-precision speed reducer

Abstract

The invention discloses an experiment table for testing transmission errors of a high-speed-ratio high-precision speed reducer. The experiment table is composed of an input shaft rotating device, a rack and a measuring system. The input shaft rotating device comprises a transition shaft and a dividing head. The measuring system is composed of an output shaft, a measuring test block and a three-dimensional measuring instrument. Both the rack and the dividing head are fixed to a worktable of the three-dimensional measuring instrument. The speed reducer to be measured is fixed to the rack. The output end of the speed reducer to be measured and the measuring test block are connected together through the output shaft. The measuring test block is in the shape of a regular polygon prism. The measuring test block is rotated by a first angle, the coordinates of two measuring points on the same measuring plane of the test bock are respectively measured through a probe of the three-dimensional measuring instrument, and the included angle between the projection of the connecting line of the two measuring points in the plane xoz of a rectangular coordinate system and the projection of the measuring test block at an initial position is the first angle. The experiment table has the advantages of being high in measuring accuracy, low in cost, simple in structure, easy to operate, capable of compensating for the measuring errors caused by assembling errors of the experiment table and the like.

Description

technical field [0001] The invention relates to a rotary transmission error testing technology of a reducer, in particular to a rotary transmission error test bench for a high-speed-ratio high-precision reducer. Background technique [0002] High-precision reducer with large speed ratio is a kind of transmission device widely used in automation equipment such as robots. This device requires a large speed ratio reduction in a limited space, usually with a speed ratio of more than 50, and requires that the rotary transmission error is less than 3arcmin . Accurately measuring and evaluating the rotary transmission error of this type of reducer, and discussing the variation law of the rotary transmission error during the operation of the reducer, are of great significance to the theoretical research and practical application of this type of reducer. [0003] The rotary transmission error of the reducer refers to the difference between the theoretical output rotation angle and t...

AI Technical Summary

Problems solved by technology

Angle encoders are limited by the number of gratings, and the measurement accuracy is difficult to meet the test accuracy requirements of high-precision reducers

In order to improve the measurement accuracy, electronic subdivision is required, which increases the measurement process, brings measurement errors, and causes unstable measurement results

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