Journal of Biosystems Engineering

Korean Society for Agricultural Machinery (한국농업기계학회)
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Development of Vibration Absorption Device for the Transportation-Trailer System(II) - Connecting Hitch for Power Tiller-Trailer -

수송 트레일러의 충격흡수장치 개발(II) - 동력경운기 연결 히치 -

  • Hong J. H. (Dept. of Mechanical Engineering, Hankyong National University,) ;
  • Lee H. J. (Dept. of Mechanical Engineering, Hankyong National University) ;
  • Lee S. B. (Dept. of Mechanical Engineering, Hankyong National University) ;
  • Park W. Y. (Dept. of Mechanical Engineering, Hankyong National University) ;
  • Kim S. Y. (Dept. of Mechanical Engineering, Hankyong National University)
  • Published : 2005.06.01
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Abstract

The improved hitch device, which connecting the trailer to power tiller, was developed. This device, composed with spring and rubber, could reduce the vibration and shock levels during driven on off-road. The vertical vibration accelerations for the improved hitch device were measured at 6 positions, i.e. engine, hitch, seat, and three points in trailer (front, middle, and rear) for not driving but at low engine speed of 500 rpm, and compared with the existing hitch device. The results of this study could be summarized as follows; The average vibration acceleration up to 120 Hz was $0.4m/s^2$ at engine part, but it was 0.08 and $0.05m/s^2$ at trailer for existing and improved hitch device, respectively. About $38\%$ of average acceleration level could be absorbed for the improved hitch device compared with existing hitch device. The average vibration acceleration up to 40 Hz was reduced to 0.12 and $0.06m/s^2$ at trailer for existing and improved hitch device respectively, showing the reduction effect of $50\%$. The maximum acceleration occurred at up to 20 Hz of low frequency was much higher than total acceleration occurred at up to 120 Hz, which means that much loss or damage could be occurred during transporting of agricultural products on off-road. The portions of average acceleration occurred at up to 20 Hz of low frequency were $27\%\;and\;21\%$ for the existing and improved hitch device, respectively.

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References

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  1. Development of Vibration Absorption Device for the Transportation-Trailer System (IV) - Connecting Hitch, Leaf Spring and Shock Absorber Suspension - vol.37, pp.6, 2012, https://doi.org/10.5307/JBE.2012.37.6.359