Test bench for testing equivalent life of speed reducer and test method

Abstract

The invention discloses a test bench for testing the equivalent life of a speed reducer. The test bench comprises a fixing base and a test device fixed on the fixing base; the test device comprises a driving motor, a to-be-tested speed reducer, an inertia disc, a torque sensor and an angular acceleration sensor, wherein the driving motor is fixed on the fixing base, the to-be-tested speed reducer is rotatably fixed on one side, far away from the driving motor, of the fixing base, and an output shaft of the driving motor is coaxially connected with an input end of the to-be-tested speed reducer; the output end of the to-be-tested speed reducer is coaxially fixed with the center of the inertia disc, the torque sensor is arranged on the output shaft of the driving motor, and the angular acceleration sensor is arranged on the inertia disc. The test bench has the advantages that the test bench not only can accurately calculate the equivalent life of the to-be-tested speed reducer in the actual operation time, but also has low requirements on the performance of the driving motor, and can simulate the instantaneous large-torque working condition of phenomena such as impact and the like.

Description

technical field [0001] The invention relates to the technical field of a reducer testing bench, in particular to a test bench and a testing method for testing the equivalent life of a reducer. Background technique [0002] With the continuous development of informatization and industrialization, the application of industrial robots is becoming more and more extensive. As the core component of the robot, the performance of the reducer directly affects the overall performance of the robot. Accuracy, transmission efficiency, reliability, etc. directly affect the function and life of the robot to a considerable extent. Therefore, the detection of the reducer becomes particularly important. As a key application index of the reducer, the service life is a key issue restricting the development of robots. [0003] At present, most of the fatigue life testing devices for robot reducers are unidirectional continuous rotary test benches or reciprocating swing arm test benches. For ex...

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Problems solved by technology

[0003] At present, most of the fatigue life testing devices for robot reducers are unidirectional continuous rotary test benches or reciprocating swing arm test benches. For example, the Chinese invention patent publication number is CN106950061A, which discloses a high-precision test bench for RV reducer transmission efficiency. , the test bench is a one-way continuous rotary test bench, but the one-way continuous rotary test bench can not simulate the actual working conditions of the reducer on the main machine such as a robot repeatedly starting and stopping, reciprocating motion; and the swing arm test bench can simulate the reducer The actual working conditions of repeated start and stop and reciprocating motion on the main machine such as a robot, but when it is in actual motion, the load of the reducer is mainly divided into two parts: inertia load and gravity eccentric load. Due to the existence of gravity eccentric load, the force situation is more complicated , the calculation of the equivalent torque is difficult, not only the test period is longer, but also often cannot be calculated accurately, resulting in the inability of the swing arm test bench to accurately test the equivalent life of the reducer

[0004] In addition, when the swing arm type test bench is used for the fatigue life test of the reducer, the maximum loading torque is generally less than the allowable torque when the reducer starts and stops, and it cannot be applied to a test with a larger loading torque such as the impact test of the reducer. The reason is that during the impact test, it is necessary to apply five times the rated load to the reducer in a short time, while the main load of the swing arm test bench is provided by the eccentric load of the inertia disk, that is, it is necessary to test the large angle of the swing arm in a short time Rotation, high performance requirements such as the speed of the drive motor, the general drive motor cannot meet this demand

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