The nut is one of the mechanical binding elements for the purpose of mechanical structure. But the weak point of the nut is that the binding force can be loosened due to various kinds of mechanical vibration. In this thesis, the new locknut is researched and developed to overcome the weak point of the existing nut. There is a spring inside of the locknut, which induces the pressure to the teeth of the screw by elastic force of spring and prevents unlocking of the mechanical structure. Therefore, by applying the locknut which comes out of this study to the mechanical structure, we can obtain not only the credibility of the products, but also the cost down through reducing the number of working process steps.

Abstract
 1. 서론
 2. 로크너트의 개념설계
  2.1 로크너트의 작동원리
  2.2 이론적 해석
 3. 시뮬레이션
  3.1 로크너트의 모델링
  3.2 로크너트의 시뮬레이션
 4. 결론
 참고문헌

• 김주용(우송대학교 철도차량시스템학과) | J. Y. KIM
• 정찬묵(우송대학교 철도건설환경공학과) | C. M. JUNG
• 어성욱(우송대학교 철도건설환경공학과) | S. W. OA
• 김용겸(동명기술공단) | Y. G. KIM