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Analysis of lock nut loosening in a forklift drive axle

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Abstract

The present study investigates the cause of the loosening of the lock nut in a forklift drive axle. Structural analysis of the wheel shaft assembly revealed that the slippage on the contact surface of the lock nut was considerable, especially when the preloads on the bearing set were lacking. Macroscopic observation of the worn out contact surface revealed that circular scratches were formed whose radii were nearly the same as the slippage distance in the structural analysis results. Experimental simulation of the loosening of the lock nut was successfully carried out.

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Authors and Affiliations

  1. School of Mechanical Engineering, University of Ulsan, Ulsan, 680-749, Korea

    S. J. Chu

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  1. S. J. Chu
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Correspondence to S. J. Chu.

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Recommended by Editor Jai Hak Park

Seok Jae Chu is a professor in School of Mechanical Engineering, University of Ulsan. He graduated from the Department of Mechanical Engineering, Seoul National University in 1979. He received his master’s degree from KAIST in 1981 and his Ph.D from KAIST in 1990.

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Chu, S.J. Analysis of lock nut loosening in a forklift drive axle. J Mech Sci Technol 27, 375–380 (2013). https://doi.org/10.1007/s12206-012-1266-x

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  • DOI: https://doi.org/10.1007/s12206-012-1266-x

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