Dynamic Torque Test Method for Crossed Roller Bearings Specially Used for Harmonic Reducers

Abstract

The invention discloses a dynamic torque testing method for a special crossed roller bearing of a harmonic reducer, which comprises the following steps: a torque loading disc is tightly fitted with a cylindrical pin, the crossed roller bearing to be tested is emptied onto the cylindrical pin, and the bearing outer The diameter and inner diameter are 90mm and 55mm respectively; the lifting motor rotates forward to lower the double grippers into place; the horizontal cylinder is controlled to drive the two grippers to synchronously engage the outer ring of the bearing, and hold the fixed bearing under test and load it with torque The discs share the center of the circle, and the cohesion method is the squeeze type; the starting load motor drives the torque loading disc to rotate, and the driving torque is transmitted to the inner ring, first rotates 720° clockwise and then 720° counterclockwise, the inner ring stops rotating, and the inner ring speed is controlled At 2rpm, when the extreme difference and average value of the torque are less than 0.2N.m and 1.2N.m respectively, it indicates that the tested crossed roller bearing rotates smoothly and the rotation tightness is appropriate. The bearing clamping positions tested in batches according to the method of the invention have high consistency, can save the clamping and concentricity process, and have high detection accuracy.

Description

【Technical field】 [0001] The invention relates to a dynamic torque test method for a cross-roller bearing specially used for a harmonic reducer, and belongs to the technical field of dynamic torque test for a cross-roller bearing for a harmonic reducer. 【Background technique】 [0002] The dynamic torque of the cross roller bearing used in the harmonic reducer is tested by artificially simulating the rotation in the prior art. The specific test operation method is as follows: [0003] Hold the outer ring of the crossed roller bearing with one hand and try to rotate the inner ring with the other hand. Whether it feels light or heavy, whether the rotation is smooth, and whether there is any stuck point in the whole ring can be used as a sample product to determine whether it is qualified. However, manual testing alone has the disadvantages of strong randomness, low testing accuracy, and low testing efficiency. When large-scale crossed roller bearings are continuously tested ma...

AI Technical Summary

Problems solved by technology

[0003] Hold the outer ring of the crossed roller bearing with one hand and try to rotate the inner ring with the other hand. Whether it feels light or heavy, whether the rotation is smooth, and whether there is any stuck point in the whole ring can be used as a sample product to determine whether it is qualified. However, manual testing alone has the disadvantages of strong randomness, low testing accuracy, and low testing efficiency. When large-scale crossed roller bearings are continuously tested manually, the physical strength of the testers will be high.

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