An advanced constant-velocity (CV) joint friction apparatus was designed and constructed to perform realistic CV joint tests and measure internal CV joint forces including friction. This was accomplished using a triaxial force transducer that was attached inside the CV joint and was able to directly measure the internal forces in three orthogonal axes during CV joint motions. In addition to these measurements, the external torque and generated axial force (GAF) were also measured and correlated with the internal CV joint forces. The CV joint apparatus is fully under computer control and is capable of performing versatile static and dynamic tests under realistic experimental CV joint conditions. Several experiments were performed under different articulation angles and lubrication conditions and it was found that larger articulation angle exhibits higher internal friction and the grease-lubricated condition exhibits lower friction coefficient than the dry unlubricated case. Furthermore, the results indicate that the internal friction at a trunnion location, obtained from the internal triaxial force transducer installed inside the CV joint, does not always agree with the externally measured GAF. Further investigation, including modeling work, is needed to fully establish a correlation between the externally measured GAF and the internal CV joint friction forces.
Development of an apparatus to investigate friction characteristics of constant-velocity joints
Entwicklung eines Apparates zur Untersuchung des Reibungsverhaltens von Gelenken bei konstanter Geschwindigkeit
Tribology Transactions ; 48 , 4 ; 505-514
2005
10 Seiten, 11 Bilder, 2 Tabellen, 8 Quellen
Article (Journal)
English
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