Contact surface fatigue life for roller rack pinion system
来源期刊：中南大学学报(英文版)2012年第12期
论文作者：KIM Chang-hyun CHOI Heung-soap KWON Soon-man
文章页码：3454 - 3459
Key words：roller rack pinion; profile shift coefficient; load stress factor; pitting life
Abstract: A roller rack pinion (RRP) system, which consists of a rack-bar and a cam pinion, transforms a rotation motion into linear motion. The rack-bar has a series of roller train and meshes with the cam pinion. First, the exact tooth profile of the cam pinion and the non-undercut condition to satisfy the required performance have been proposed with the introduction of the profile shift coefficient. Then, the load stress factors are investigated under the variation of the shape design parameters to predict the gear surface fatigue limit which is strongly related to the gear noise and vibration at the contact patch. The results show that the pitting life can be extended significantly with the increase of the profile shift coefficient.
KIM Chang-hyun1, CHOI Heung-soap2, KWON Soon-man1
(1.Department of Mechanical Design and Manufacturing Engineering,
Changwon National University，Changwon 641-773, Korea
2. Department of Mechano-Informatics and Design Engineering, Hongik University, Sejong 339-701, Korea)
Abstract:A roller rack pinion (RRP) system, which consists of a rack-bar and a cam pinion, transforms a rotation motion into linear motion. The rack-bar has a series of roller train and meshes with the cam pinion. First, the exact tooth profile of the cam pinion and the non-undercut condition to satisfy the required performance have been proposed with the introduction of the profile shift coefficient. Then, the load stress factors are investigated under the variation of the shape design parameters to predict the gear surface fatigue limit which is strongly related to the gear noise and vibration at the contact patch. The results show that the pitting life can be extended significantly with the increase of the profile shift coefficient.
Key words:roller rack pinion; profile shift coefficient; load stress factor; pitting life
