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Study on Shift characteristic of Small reducer using Eccentric arm

편심캠을 이용한 소형감속기의 변속특성에 관한 연구

  • 염광욱 (동주대학교 자동차.기계과) ;
  • 함성훈 (동주대학교 자동차.기계과)
  • Received : 2017.02.01
  • Accepted : 2017.03.10
  • Published : 2017.03.31

Abstract

In this study, a new type of eccentric cam was used for the development of a small size reducer with a two-shift reduction ratio while maintaining the same volume as the existing one-shift speed reducer. Therefore, a two-shift speed reducer was designed using the concept of a continuously variable transmission applied to automobiles. The cam was designed to have an eccentric shape with a $180^{\circ}$ phase difference to act as a tensioner to minimize slip by squeezing the V-belt connected to the deceleration pulley and the acceleration pulley, respectively. The cam was designed to have a diameter of 35mm and an outer diameter of 18mm so that the outer portion of the v-belt could contact the cam perfectly. A pulley with a diameter of 50.8mm was installed on the low speed pulley input shaft for deceleration and a pulley with a diameter of 76.2mm was provided on the output shaft. In the high-speed pulley for acceleration, a pulley with a diameter of 76.2mm is provided on the input shaft, and a pulley with a diameter of 50.8mm is provided on the output shaft. Based on the design details, the power transmission efficiency test and the heating characteristics of the transmission were tested to verify the feasibility. In addition, through validation, the suitability of the reducer was demonstrated.

본 연구에서는 부피는 기존 1단 감속기와 동일한 수준을 유지하면서 2단의 감속비를 갖는 소형감속기에 대한 개발을 위하여 새로운 형태의 편심캠을 이용한 감속기의 연구를 진행하였다. 따라서 자동차에 적용되는 무단변속기의 개념을 이용하여 2단 감속기를 설계하였다. 캠은 감속풀리와 가속풀리에 각각 연결되어있는 V-벨트를 압착하여 미끄러짐을 최소화하기 위하여 텐셔너 역할을 할 수 있도록 $180^{\circ}$의 위상차를 두고 편심형태를 가지는 구조로 설계하였다. 또한 캠의 직경을 35mm로 하고, 외경의 폭을 18mm로 하여 v-벨트의 외측부분과 캠이 완벽하게 접촉할 수 있는 구조로 설계하였다. 감속을 위한 저속 풀리는 입력축에 지름 50.8mm의 풀리를 설치하고, 출력축에 지름76.2mm의 풀리를 설치하였다. 가속을 위한 고속 풀리에는 입력축에 지름 76.2mm의 풀리를 설치하고, 출력축에 지름 50.8mm의 풀리를 설치하였다. 설계된 내용을 토대로 변속기의 동력전달효율실험과 발열특성에 대한 실험을 진행하여 타당성을 검증하였다. 또한 타당성 검증을 통하여 감속기의 적합성을 증명하였다.

Keywords

References

  1. H. S. Ha, J. S. Shin, S. K. Pyo, H. S. Jung and J. H. Kang, "A Study on the Strategy of Fuel Injection Timing according to Application of Exhaust Gas Recirculation for Off-road Engine", Transaction of the Korean Society of Automotive Engineers, vol. 24, no. 4, pp. 447-453, 2016. DOI: https://doi.org/10.7467/KSAE.2016.24.4.447
  2. S. H. Baek, J. H. Yoon, W. S. Jung, H. S. Ha, S. S. Chung and J. K. Yeom, "Estimation of the Exhaust Characteristics of Biodiesel Used in Diesel Engine", Transactions of the Korean Society of Mechanical Engineers - B, vol. 38, no. 2, pp. 129-137, 2014. DOI: http://doi.org/10.3795/KSME-B.2014.38.2.129
  3. K. W. Youm and S. J. Kim, "A Study on Distillation Property of Automotive Gasoline and Diesel Fuel", Journal of the Korean Society for Power System Engineering, vol. 18, no. 5, pp. 11-15, 2014. DOI: https://doi.org/10.9726/kspse.2014.18.5.011
  4. W. J. Lee, S. R. Lee and C. E. Lee, "A Numerical Study on Combustion Characteristics of HCCI Engine with Stratification Condition of EGR Exhaust Gases", Transaction of the Korean Society of Automotive Engineers, vol. 19, no. 6, pp. 46-52, 2011.
  5. J. S. Yoo, C. S. Kim, "A Study on Waveform Analysis of Oxygen Sensor, Injector and Secondary Waveform through Emission Characteristics by a Decrepit Vehicle", Transaction of the Korean Society of Automotive Engineers, vol. 21, no. 5, pp. 151-156, 2013. DOI: https://doi.org/10.7467/KSAE.2013.21.5.151
  6. W. S. Oh, B. H. Yu, T. J. Park and C. E. Lee, "A Fundamental Study of Hybrid Combustion System Applying Exhaust Gas Recirculation", Journal of Energy Engineering, vol. 25, no. 1, pp. 100-107, 2016. DOI: https://doi.org/10.5855/ENERGY.2015.25.1.100
  7. J. Y. Jeon, H. K. Kang and H. D. Lee, "Development of BMS ECU for Eco-Friendly Car", The Korean Society Of Automotive Engineers 2009 Annual Conference, pp. 2928-2933, 2009.
  8. H. K. Kim, K. Y. Lee, D. O. Kim and H. S. Choi, "Study on the Electric Continuity Measurements of Green Car for Human Body Safety", The Transaction of the Korean Institute of Electrical Engineers P, vol. 58, no. 3, pp. 351-356, 2009.
  9. B. S. Kil and G. C. Kim, "The Analysis of a Electric Scooter's Performance through Motor and Battery Capacity Changing", Transaction of the Korean Society of Automotive Engineers, vol. 19, no. 5, pp. 7-13, 2011.
  10. S. M. Lee, Y. M. Jeong, W. Y. Sung, O. J. Kim and B. K. Lee, "Advanced control-algorism of In-wheel motor driving system for electric vehicle", KIEE, pp. 348-350, 2012.
  11. S. Y. Yun and J. Lee, "Implementation of In-wheel Motor Driving System for Electric Vehicle", The Transaction of the Korean Institute of Electrical Engineers, vol. 62, no. 6, pp. 750-755, 2013. DOI: https://doi.org/10.5370/KIEE.2013.62.6.750
  12. J. Y. Kim and Y. I. Park, "Analysis of Agricultural Working Load Experiments for Reduction Gear Ratio Design of an Electric Tractor Powertrain", Transaction of the Korean Society of Automotive Engineers, vol. 20, no. 5, pp. 138-144, 2012. DOI: https://doi.org/10.7467/KSAE.2012.20.5.138
  13. C. H. Lin, "A Six-Phase CRIM Driving CVT using Blend Modified Recurrent Gegenbauer OPNN Control", Journal of Power Electronics, vol. 16, no. 4, pp. 1438-1454, 2016. DOI: https://doi.org/10.6113/JPE.2016.16.4.1438
  14. S. M. Kim, C. H. Zheng, W. S. Lim and S. W. Cha, "Performance Analysis of the Rubber Belt type CVT System", Journal of the Korean Society of Manufacturing Technology Engineers, vol. 20, no. 4, pp. 376-381, 2011.