• Title/Summary/Keyword: Cycloid tooth profile

Search Result 10, Processing Time 0.024 seconds

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

  • Ham, Seong-Hun;Youm, Kwang-Wook
    • Journal of the Korean Institute of Gas
    • /
    • v.18 no.6
    • /
    • pp.45-50
    • /
    • 2014
  • In this paper, designed the driving part of a straight line precision transfer system which can be applied to industrial machines and industrial robots. The direction of power transfer and the output characteristic are similar to those of the conventional rack-pinion type, but it applied new pin-pinion type to the driving part. As a result, it achieved indefinite expandability in length and secured the convenience of installation. To determine the optimal contact of pin-pinion gear, it conducted a Cycloid tooth profile analysis.

Development of harmonic drive using cycloide tooth profile (사이크로이드 치형을 이용한 하모닉 감속기의 개발)

  • Lee, Chong-Won;Oh, Se-Hoon;Kim, Jun-Cheol;Jeon, Han-Su
    • Transactions of the Korean Society of Mechanical Engineers A
    • /
    • v.21 no.7
    • /
    • pp.1166-1173
    • /
    • 1997
  • Due to progress in manufacturing techniques, the performance of the harmonic drive has been improved but not sufficiently. One of the important problems which the current harmonic drive has is that while there is the potential for having a wider tooth contact area, the total number of teeth engaged simultaneously is still small. This is mainly due to the involute tooth profile. Hence, in this study, the cycloid-type tooth profile is developed to improve this problem. This paper represents the design methodology and performance evaluation f the cycloid-type harmonic drive. Cycloide tooth profile was derived by analyzing geometry of the tooth engagement and the contact mechanisms of the tooth which were examined and analyzed by load analysis. The stress due to elastic deformation of a flexspline was also obtained by approximate formula and computer analysis. Finally, the cycloid-type harmonic drive with 1:100 speed ratio was manufactured and the performance of the harmonic drive was evaluated.

A Study on the Design and Experiment for the Profile of Lower-Noise Gear Tooth (저소음 치형의 설계 및 실험에 관한 연구)

  • 김호룡;안승준
    • Transactions of the Korean Society of Mechanical Engineers
    • /
    • v.17 no.1
    • /
    • pp.1-10
    • /
    • 1993
  • A design method of gear tooth profile which can reduce the noise of gear is studied. The tooth profile is generated by combining involute and cycloid tooth curves in which the involute tooth profile is near the pitch point and cycloid tooth profile at the addendum and the dedendum. Considering parameters which have an influence on the reduction of gear noise and building up a design conditions for the noise reduction of gear, the lower-noise combined gear tooth profile is designed. For the check of noise reduction of the combined gear profile, two pairs of combined profile gear, two pairs of involute gear, and a pair of cycloid gear were manufactured by the NC Wire Cutting Machine, and the experiment for measuring of gear noise was carried out on each pair. The noise reduction of the combined profile gear was obtained.

A Study on The Tooth Creating Algorithms of The Cycloid Curve Gear and The Third Polynomial Curve Gear (사이클로이드 곡선 및 3차 다항식 곡선기어의 치형 설계에 관한 연구)

  • 최종근;윤경태
    • Transactions of the Korean Society of Machine Tool Engineers
    • /
    • v.11 no.3
    • /
    • pp.80-85
    • /
    • 2002
  • The free curve gear is a non-circular gear without any relating center, which can perform free curve motion for complicated mechanisms, and minimize the work area. In this study, an algorithms for tooth profile generation of free curve involute gear is developed. The algorithm uses the involute gear creating principle in which a gear can be generated by rolling with another standard involute one. Cycloid me and third polynomial curve gears were designed and verified by computer graphics. These gears are manufactured in the wire-cut EDM and examined in engagement with a standard spur gear. The results showed that the proposed algorithm is successful to design and to manufacture the free curve gear with concave and convex profiles.

A Study on Optimum Tooth Profile of Pin-Pinion Gear for Linear Motion (직선이송용 Pin-Pinion Gear의 최적 치형에 대한 연구)

  • Ham, S.H.;Nam, W.K.;Oh, S.H.
    • Journal of Power System Engineering
    • /
    • v.14 no.3
    • /
    • pp.64-70
    • /
    • 2010
  • In this study, designing of precise linear transferring device which can be applied to industrial machine and robot industry has been introduced. The direction of power flow and output feature are similar to current Rack-Pinion type. However, unlimited length extensity via rack modulizing, and securing high velocity transportation have been realized by applying Pin-Pinion Gear type at the operation part. The analysis has been calculated to obtain the Pin-Pinion Gear's optimized tooth profile. As a result of research, it is impossible to control precisely even overlap at the teeth of involute and sprocket. Because they have peculiar gearing structure. Therefore, modified cycloid tooth has been proposed to perform high velocity, precise control without backlash.

Stress Concentration FEM Simulation of Robot Speed Reducer(RSR) with Straight Line Teeth Profile (직선 치형을 가진 로봇 감속기(RSR)의 응력 집중 FEM 해석)

  • Nam, Won-Ki;Kook, Chang-Ho;Ham, Seong-Hun;Jang, In-Hun;Oh, Se-Hoon;Sim, Kwee-Bo
    • Journal of the Korean Institute of Intelligent Systems
    • /
    • v.17 no.7
    • /
    • pp.952-956
    • /
    • 2007
  • In industrial site, as the technology of FA developes, many robots can take the place of human labor. Generally, robots require high precision reducers which have cycloid or involute tooth profile. These reducers provide high reduction ratios with low backlash and high accuracy but need a high stiffness of tooth. In this study, to improve the high precision, the cycloid reducers which have straight line teeth profile are used. Also the FEM analysis, which consist of straight line teeth profile, was performed to simulate the stress of teeth profile.

Development and Design of Robot Speed Reducer(RSR) with Straight Line Teeth Profile for Human Robot (휴먼 로봇을 위한 직선 치형을 갖는 로봇 감속기(RSR)의 설계 및 개발)

  • Nam Won-Ki;Jang In-Hun;Oh Se-Hoon;Shin Kwee-Bo
    • Journal of the Korean Institute of Intelligent Systems
    • /
    • v.16 no.3
    • /
    • pp.315-320
    • /
    • 2006
  • There are many types of reduction drives for industrial applications. In general, high precision speed reducer which has a cycloid or involute teeth profile, used to in robot. Because, it is essential to use precision reduction drives for accuracy of position control on robot system. In this paper, we propose a robot speed reducer(RSR) with straight line teeth profile, which has basically a triangle teeth profile. In new straight line teeth profile, we have a good result for strength, stress and stiffness by using finite element analysis and the results indicate that variation of eccentric coefficient affects the optimal tooth motion, and it can lower the stress and noise.

A speed reducer for a robot with straight line teeth profile (직선 치형을 갖는 로봇용 감속기 운동해석)

  • Nam Won-Ki;Lim Sun-Ho;Jeon Han-Su;Oh Se-Hoon
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • 2006.05a
    • /
    • pp.91-92
    • /
    • 2006
  • High precision speed reducer which has a cycloid or involute teeth profile, used to in Robot. In this study, suggest to a new teeth profile, which has basically a triangle teeth profile. We had a stress analysis compare to convenient speed reducer for teeth profile. We has a good results in new teeth profile for strength, stress and stiffness.

  • PDF

A Study on Epitrochoidal Tooth Profile in A Two Teeth Difference Cycloidal Reducer (2치수차 사이클로이드 감속기의 형상설계에 관한 연구)

  • Shin J.H.;Kwon S.M.;Kim B.J.;Kim J.C.;Kim M.S.
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • 2006.05a
    • /
    • pp.389-390
    • /
    • 2006
  • The cycloidal reducer is one of the velocity controlling equipments in machinery. It has advantages of the higher reduction ratio, the higher accuracy, the easier adjustment of the transmission ratio and the smaller workspace than any other kinds of the reducers. This paper proposes a simple and exact approach for the lobe profile design of the two teeth difference cycloidal plate gear, which is different from the standard cycloidal reducer, by means of the principle of the instant velocity center in the general contact mechanism and the homogeneous coordinate transformation.

  • PDF