• Title/Summary/Keyword: Rack/Pinion

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Cycloid 치형을 적용한 Pin-Pinion 치형에 대한 연구 (A Study of Pin-Pinion Tooth Profile Applied with Cycloid Tooth Profile)

  • 함성훈;염광욱
    • 한국가스학회지
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    • 제18권6호
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    • pp.45-50
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    • 2014
  • 본 논문에서는 산업기계 및 로봇산업에 적용할 수 있는 직선 정밀 이송 장치의 구동부를 설계하였다. 동력의 전달방향 및 출력특성은 기존의 Rack-Pinion 타입과 유사하나 구동부에 대하여 새로운 Pin-Pinion Gear 타입을 적용시켜 랙 모듈화를 통한 무한 길이 확장성을 구현하고 고속이송 및 설치의 편의성을 확보할 수 있으며 이러한 Pin-Pinion Gear의 최적물림을 위한 Cycloid 치형 해석을 하였다. 그 결과 Cycloid 치형으로 설계시 핀과 피니언 기어의 백래쉬 및 물림 특성이 적합하여 정밀제어가 가능한 치형으로 분석되었다.

RRP 시스템의 피팅수명 (Pitting Life for RRP System)

  • 김창현;남형철;권순만
    • 대한기계학회논문집A
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    • 제36권4호
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    • pp.387-393
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    • 2012
  • 본 논문에서는 기존 랙-피니언 시스템의 랙 치형을 핀 또는 롤러로 대체한 롤러 랙 피니언 (RRP) 시스템의 표면피로 향상방안을 고찰하였다. 우선 전위계수(profile shift coefficient)를 고려하여 RRP 시스템의 캠 피니언(cam pinion)에 대한 엄밀 치형설계 방법 및 언더컷 방지 조건을 소개하였고, 이를 바탕으로 설계인자의 변화에 따른 하중 및 하중응력계수(load stress factor)의 변화를 검토하였다. 이를 통해 RRP 시스템의 표면 내구성을 향상시킬 수 있는 방안으로 전위계수의 증가가 효과적임을 알 수 있었다.

랙-피니언 조향기구의 조향오차 최적설계 (Optimum Design for Reducing Steering Error of Rack-and-Pinion Steering Linkage)

  • 홍경진;최동훈
    • 한국자동차공학회논문집
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    • 제6권2호
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    • pp.43-53
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    • 1998
  • This paper addresses an optimization for reducing a steering error of a rack-and-pinion steering linkage with a MacPherson strut independent front suspension system. The length, orientations and inner joint positions of a tie-rod are selected as design variables and Ackerman geonetry, understeer effect, minimum turn radius, wheel alignment and packaging are considered as design constraints. Nonlinear kinematic analysis of the steering system is performed for calculating the values of cost and constraints, and Augmented Lagrange Multiplier(ALM) method is used for solving the constrained optinization problem. The optimization results show that the steering error are considerably reduced while satisfying all the constraints.

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일방향 기구 기반 랙-피니언 기어를 이용한 병진형 파력발전장치에 대한 기초연구 (Fundamental Study for Ocean Wave Energy Converter Using a Rack-Pinion Gear Based One-way Mechanism)

  • 이준경;조성일;이세한;이상천;노현철
    • 한국신재생에너지학회:학술대회논문집
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    • 한국신재생에너지학회 2011년도 춘계학술대회 초록집
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    • pp.167.1-167.1
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    • 2011
  • Sustainable energy generation is becoming extremely imperative due to the expected limitations in current energy resources and to reduce pollution. Especially, because of its considerable energy potential, ocean wave energy has been investigated with regard to power generation. To develop large high power wave generator system, it is important to make a small scale proto type and to test that. Thus the objective of this research is to examine the characteristics of a mechanically excited generator system having small power capacity experimentally. The water reservoir (4 m length, 1.5 m width and 1.8 m depth) having a wave maker to make arbitrary height and period of the water wave was made. The proto type consists of three main parts; a buoy, rack-pinion base one-way mechanism, and a wave generator(Fig.1). The water wave is going up and down and the hexahedron buoy is following the wave. The rack gear attached to the buoy is also going up and down to roll the pinion connected to an electric generator then it produces electricity. The experiments were performed with several conditions of water waves, and the power outputs over 30 W could be measured for some conditions. In future works, to achieve higher performance for the proto type, the effects of primary parameters (buoy shape and mass, etc.) on the system efficiency will be identified.

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자동차 조향장치의 트라이볼로지적 고장특성에 관한 사례연구 (Case Study of Tribological Failure Characteristics in Automotive Steering System)

  • 김청균;이일권;조승현
    • Tribology and Lubricants
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    • 제26권1호
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    • pp.61-67
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    • 2010
  • The purpose of this paper is to study and analyze the failure examples on tribological characteristics of an automotive steering system. In this failure study, the grease leakage may stick leaked grease, dust, and wear particles between pinion and rack gears in mechanical steering system. In the case of seal failures such as a rod seal, o-ring and oil seals, the gear box and oil pump do not operate properly due to lack of oils. This means that oil pump does not supply a working fluid and produce a normal oil pressure of the steering system. This leads to leak a working fluid from the seals and produce a wear between pinion and rack gears. Especially, the leaked oil is usually mixed with internal wear particles and foreign dust/fine sands. Thus no leakage of working oils is very important design concepts, which is strongly related to the sealing components and smoothly operating of the mechanical friction parts of power steering system.

자동차용 피니언 기어의 설계 형상에 따른 내구성 해석 (Durability Analysis due to Design Shape of Pinion Gear)

  • 최계광;조재웅
    • 한국기계가공학회지
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    • 제19권7호
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    • pp.16-21
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    • 2020
  • The structural analyses were conducted with three models of pinion gears connected to the rack gear which is driven by the steering axle at an automobile. Three models 1, 2 and 3 are designed as the different pinion gears due to the vehicle type. The lower the value of maximum stress, the better the durability of model. Model 3 has the best durability among three models. Models 1 and 2 are expected to require the adjustment in order to improve the durability better. By the utilization of this study result, it is thought to apply at designing the pinion gear with durability at the automobile.

산업용 인벌류트 치차 설계를 위한 자동화 기술에 관한 연구 (A Study on Automatic Technology for a industrial Industrial Involute Gears Design)

  • 조성철;변문현
    • 한국안전학회지
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    • 제12권4호
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    • pp.39-46
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    • 1997
  • This study describes a computer aided design system on involute gear for power transmition. Input data for gear design are pressure angle $20^{\circ}$, transmitted power, gear volume, gear ratio, addendum ratio of rack, dedendum ratio of rack, edge radius of rack, allowable contact stress and allowable bending stress etc. Bending strength contact strength and scoring are considered as the design constraints. Method of optimization developed this study. The developed gear design system can design the optimized gear that minimize the number of pinion teeth with face tooth.

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계수기용 비인벌류트 치형의 내치차 설계와 물림해석 (Design and Meshing Analysis of a Non-involute Internal Gear for Counters)

  • 이성철
    • Tribology and Lubricants
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    • 제30권4호
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    • pp.212-217
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    • 2014
  • A counter gear transmits the rotation angle, so the angular velocity ratio of the gear does not necessarily need to be constant in the meshing process. As a pinion has a small number of teeth when combined with an internal gear for counters, tooth interference can occur with the use of an involute curve. This paper introduces circular arcs that represent a tooth profile and fillet for the profile design of a pinion through the combination of arcs with lines. The straight line of a rack tooth represents the profile of a mating internal gear. Thus, the circular arc and line maintain contact during the rotation of the counter gear. This paper presents an analysis of the meshing of the circular arc tooth and rack tooth along with the properties of the counter gear, such as the change in rotational velocity and amount of backlash. The contact ratio of the counter gear is 1 because the tooth contact occurs between circular arcs and line. The initial position of tooth contact, which denotes the simultaneous contact of two teeth, is found. As the rotation of the pinion, only one tooth keeps the contact situation. This meshing property is analyzed by the geometrical constraints of the tooth profile in contact and the results are presented as graphical diagrams in which tooth-arc movements are superimposed.

차량 동력학 해석을 위한 조향장치 모델링 (Steering Model for Vehicle Dynamic Analysis)

  • 탁태오;김금철;윤중락
    • 한국정밀공학회지
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    • 제16권12호
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    • pp.214-221
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    • 1999
  • In this research, a power-assisted steering system is modeled as a part of a full vehicle dynamic model. The dynamic model of the steering system incorporates hydraulic and dynamic relations between major parts of a steering system, such as steering column, control valve, rack and pinion gear. Through an experimental setup of the steering system, the steering system model is validated. The steering model is included in a full vehicle dynamic model of a car, where kinematic relations between steering and suspension system are defined, and various simulations are performed to evaluate the performance of steering system in conjunction with overall dynamic performance of the vehicle.

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파워 스티어링 시스템의 수학적 모델에 관한 연구 (A Mathematical Model of a Power Steering System)

  • 장봉춘;이성철
    • 한국자동차공학회논문집
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    • 제5권4호
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    • pp.39-47
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    • 1997
  • The focus of this research is to set up and describe the mathematical derivation of an automobile power-assisted rack and pinion steering system dynamics. The mathematical model of the power steering system dynamics with a 5 DOF linear vehicle model will be used in the computer simulation and evaluated comparing with the experimental results. This model is flexible to accommodate different vehicles through simple parameter changes. The developed mathematical model will attempt to provide enhanced driver realism to a Systems Technology, Inc. driving SIMulator(STISIM).

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