• Title/Summary/Keyword: Planocentric Gear

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Analysis of Planocentric Gear

  • Kim, H.J.
    • Agricultural and Biosystems Engineering
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    • v.7 no.1
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    • pp.13-17
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    • 2006
  • The planocentric gear, known as wobble mechanism, has been used for speed reducing mechanism as an ingenious mechanism. The modem application can be found in the backrest adjusting mechanism of a vehicle reclinable seat, fluid pumps and aircraft hoist and winches. Higher speed reduction ratios, high load capacity, lower weight, and compactness are the main advantages of this gear. This paper presents velocity and static force analysis to investigate the friction lock of the planocentric gear. The rectilinear tooth profile is used to maximize the speed reduction ratio. The equivalent linkage system is used for the analysis of instantaneous motion. As the results, the transmission efficiency of the planocentric gear is found and the friction lock of the system is determined for the friction coefficients of journals. A numerical example that illustrates the developed analysis is presented.

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An Experimental Study on the Noise Identification of a Planocentric Gear Reducer (내접 유성식 감속기의 소음원 규명에 대한 실험적 연구)

  • Chung, Jin-Tai;Hong, Il-Hwa;Yoon, An-Soo
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • pp.697-701
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    • 2007
  • In this paper, noise sources of a planocentric gear reducer are identified by experimental mehod. This study consider a reduction method of a noise/vibration about the gear, axle, bearing and others. Namely, the purpose of this study is to reduce a noise/vibration for a stability of the total system. Form the data to be measured through an experimental method, the problems of the gear, axle, bearing and others are examined closely, and the reducer is derived the model to be the engineering. The mechanism of the problem occurrence is examined through a parametric research about an each influence factor(Load). Lastly, the results of this study propose the model to be improved.

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A Study on Noise Reduction for an Industrial Right-angled Reducer (산업용 직각형 감속기의 소음 저감에 대한 연구)

  • Seo, Hong-Seung;Park, Sung-Pil;Chung, Jin-Tai
    • Transactions of the Korean Society for Noise and Vibration Engineering
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    • v.21 no.6
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    • pp.546-552
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    • 2011
  • In this study, noise sources of a reducer which is combined a spiral bevel gear and a planocentric gear are identified by experimental method and the noise was reduced by the structure modification of the reducer. In order to identify the noise sources, noise and vibration signals were measured by microphone and accelerometer and these signals were analyzed with waterfall plot. In addition, the frequency response functions were obtained to prove the noise and vibration sources. It was found that the resonance was generated by the gear mesh frequencies and natural frequency of the reducer. The noise of the reducer could be reduced by structure modification.

A Study on the design of planocentric gear reducer used in industrial robots (로보트용 내접 유성식 감속기의 설계에 대한 연구)

  • 이성철;오박균;권오관
    • Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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    • pp.41-49
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    • 1987
  • 관절 로보트를 위시한 각종 매니퓨레이터 장치의 관절 구동부는 모터와 감속기의 조합으로 구성되어 있다. 최근에는 감속기를 내재하지 않는, 직접구동 방식이 연구중이지만 모터는 고속회전율 시키는 것이 동력밀도가 크기 때문에 대부분 감속기를 사용하여 회전속도를 감속하고 토오크를 증대하여 매니퓨레이터를 구동시키고 있다. 본 연구에서는 내접 유성식 감속기의 국산화를 도모하기 위하여 원통형 핀을 내치차 치형으로 사용한 내접 유성식 감속기의 설계 기술을 개발하였다. 치형 수정계수를 도입하여 수정계수 변화에 대한 치형의 변화와 접촉 하중 및 응력의 변화를 검토하고 로오크 전달시 기구에 작용되는 하중을 해석하여 내접 유성식 감속기의 설계 기법을 제시하였다.

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A Study on Noise Reduction for the reducer designed right angle (산업용 직각형 감속기의 소음 저감에 대한 연구)

  • Seo, Hong-Seung;Park, Sung-Pil;Chung, Jin-Tai
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • pp.51-56
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    • 2011
  • In this study, noise sources of a reducer which is combined a spiral bevel gear and a planocentric gear are identified by experimental method and the noise was reduced by the structure modification of the reducer. In order to identify the noise sources, noise and vibration signals were measured by microphone and accelerometer and these signals were analyzed with waterfall plot. In addition, the frequency response functions were obtained to prove the noise and vibration sources. It was found that the resonance was generated by the gear mesh frequencies and natural frequency of the reducer. The noise of the reducer could be reduced by structure modification.

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