[ Papers ]

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 27, No. 6, pp.492-498

ISSN: 2508-5093 (Print) 2508-5107 (Online)

Print publication date 15 Dec 2018

Received 23 Aug 2018 Revised 08 Oct 2018 Accepted 10 Oct 2018

DOI: https://doi.org/10.7735/ksmte.2018.27.6.492

롤러-랙 피니언 시스템의 이뿌리 굽힘응력

권순만^a^{, *}

; 차다인^a

Tooth Root Bending Stress of Roller-Rack and Pinion System

Soon-man Kwon^a^{, *}

; Da In Cha^a

aSchool of Mechanical Engineering, Changwon National University, 20, Changwondaehak-ro, Uichang-gu, Changwon, Gyeongnam-do, 51140, Korea

Correspondence to: ^*Tel.: +82-55-213-3629 Fax: +82-55-263-5221 E-mail address: smkwon@changwon.ac.kr (Soon-man Kwon).

Abstract

A tooth root bending stress equation for a roller-rack and pinion (RRP) system is presented in this paper as a solution to the problem of tooth root breakage in a pinion jacking system based on an involute tooth profile. The bending strength geometry factor for the RRP system was determined by the same procedure as that for the involute tooth profile. The tooth root bending stress of the RRP system was found to be lower than that of the involute teeth with the same design specification. It can also be lowered by increasing the profile shift coefficient and the number of teeth of the pinion, and by decreasing the roller diameter coefficient. Finally, it was confirmed that the RRP system could provide a new solution to the bending strength problem of a conventional rack and pinion system.

Keywords:

RRP(roller-rack and pinion), Tooth root bending stress, Tooth form factor, Fatigue stress concentration factor, Bending strength geometry factor

Acknowledgments

본 연구는 2017년도 산업통상자원부의 재원으로 한국에너지기술평가원(KETEP)의 지원을 받아 수행한 연구과제입니다. (No. 20173030024690)

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