Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Pitting Life for RRP System

RRP 시스템의 피팅수명

  • Kim, Chang-Hyun (Dept. of Mechanical Design & Manufacturing Engineering, Changwon Nat'l Univ.) ;
  • Nam, Hyung-Chul (Dept. of Mechanical Design & Manufacturing Engineering, Changwon Nat'l Univ.) ;
  • Kwon, Soon-Man (Dept. of Mechanical Design & Manufacturing Engineering, Changwon Nat'l Univ.)
  • 김창현 (창원대학교 기계설계공학과) ;
  • 남형철 (창원대학교 기계설계공학과) ;
  • 권순만 (창원대학교 기계설계공학과)
  • Received : 2011.06.23
  • Accepted : 2012.02.07
  • Published : 2012.04.01

Abstract

A roller rack pinion (RRP) system, which consists of a rack-bar and a cam pinion, transforms a rotation motion into a linear one. The rack-bar has a series of roller trains, and meshes with the cam pinion. This paper first proposes the exact tooth profile of the cam pinion and the non-undercut condition to satisfy the required performance by introducing the profile shift coefficient. The paper then investigates the load stress factors under various shape design parameters to predict the gear surface fatigue limit, which was strongly related to the gear noise and vibration at the contact patch. The results show that the pitting life can be extended significantly with an increase in the profile shift coefficient.

Keywords

Roller Rack Pinion;Profile Shift Coefficient;Load Stress Factor;Pitting Life

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Acknowledgement

Supported by : 창원대학교

References

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