System development of moment stiffness of hub bearing unit and wheel edge assembly

HUANG De-jie1, ZHOU Xu1, CHEN Wei-jun1, SHU Wei-cai2, JIN Yang1
(1.Zhejiang Wan Xiang Precision Industry Co., Ltd., Hangzhou 311215, China;
2.Technology Center, Wan Xiang Qian Chao Co., Ltd., Hangzhou 311215, China)

Abstract: Aiming at the problem of the moment stiffness evaluation method of hub bearing unit, hub bearing unit moment stiffness was defined, and the design check method of moment stiffness was introduced, and test method of moment stiffness of hub bearing unit was studied. On the basis of the test method, the test system of moment stiffness was developed. The difference between the stiffness test system and the traditional stiffness test system was compared. The stiffness test system was applied to measure the moment stiffness of a typical three generation wheel hub bearing unit, and the test result influence from weight of rigid plate was analyzed. Test result shows that the stiffness test system has obvious advantages of accurate measurement. The test error reached the same level with the foreign famous bearing company. The wheel edge assembly stiffness is less 19% than hub bearing unit, and the influence deviation from weight of rigid plate is no more than 1.5%.

Key words: bearing unit; wheel edge assembly; moment stiffness; test system