Analysis of the stress-strain state of an external roller freewheel mechanism cage

The stress-strain state of the external cage that is an important structural element of a roller freewheel mechanism (RFM) has not been adequately studied recently. In the scientific literature, external cages are preferably analyzed using simplifying assumptions and approximate formulas. This paper presents the results of computer simulation of strains and stresses in an external RFM cage by the finite element method. It has been found that maximum stresses occur around the joints between a plate and the hub and shell of the external cage. At the same time, maximum deformations occur on the free edge of a cylindrical shell. The study proved that the load capacity of RFMs with six rollers is larger than that for RFMs with three rollers, while the stresses and strains in the external cage are smaller. The results obtained by the finite element method are confirmed by theoretical calculations based on well-known formulas. The results of this study can be used for choosing optimum geometrical parameters of external RFM cages.

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