Relevant bibliographies by topics / Cycloidal gear

Academic literature on the topic 'Cycloidal gear'

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Published: 14 March 2023

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Journal articles on the topic "Cycloidal gear"

1

Su, De Yu, Shan Ming Luo, and Jian Wang. "Study on Meshing Force and Rigid-Flexible Coupling Dynamic Simulation of Cycloid Drive." Advanced Materials Research 1039 (October 2014): 36–43. http://dx.doi.org/10.4028/www.scientific.net/amr.1039.36.

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The meshing force between pin wheels and gear teeth of modified and standard cycloidal gears is calculated. The parametric model of cycloidal gear and pin wheels is built. The flexible processing of cycloidal gear and pin wheel is conducted using Ansys software. The virtual prototype of cycloid reducer is built. The dynamic simulation of rigid-flexible coupling of modified and standard cycloidal gears has been developed, respectively. The meshing force with friction is calculated and the maximum equivalent stress is obtained. A comparison study of the meshing force using theoretical method is also carried out. It is significant to provide theoretical and technical supports for cycloidal gear design.
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Jiang, Chuang, Huiliang Wang, Tianhao Han, and Xing Liu. "Simulation and Compensation of Axial Geometric Errors for Cycloidal Gears Based on Form Grinding." Mathematical Problems in Engineering 2022 (April 21, 2022): 1–16. http://dx.doi.org/10.1155/2022/4804498.

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To increase quality, reduce cycloidal gear noise, and avoid unnecessary vibration and shock, a compensation of axial geometric errors method is proposed based on the cycloidal gear form grinding. In the process of machining cycloidal gears, the relative position relationship between the grinding wheel and workpiece is affected by geometric errors of the motion axes, which has serious effects on the surface accuracy of the cycloidal gears. Combined with cycloidal gear form grinding kinematic principles, a geometric error model for each axis of a four-axis computer numerical control form grinding machine is established. By changing the compensation value of the geometrical errors on six degrees of freedom, the error of the cycloid gear tooth surface machined is obtained. Based on a sensitivity analysis of geometrical errors of each axis, the corrections are determined through an optimization process that targets the minimization of the tooth flank errors. The geometric errors of each axis of the cycloid gear grinding machine are compensated, and then, the cycloid gears produced by the machine are processed. Through the processing experiment, the error data of the actual processing before and after the compensation are compared, which indicates that the machining accuracy of the cycloid gear grinding machine is obviously improved. It has an important guiding significance in improving the precision and performance of large CNC form gear grinding machines.
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DUDA, Henryk, and Bogdan WARDA. "EFFECT OF STRAIGHT-LINE MECHANISM DESIGN ON THE LOAD DISTRIBUTION IN A CYCLOIDAL GEAR." Tribologia 279, no. 3 (July 1, 2018): 35–42. http://dx.doi.org/10.5604/01.3001.0012.7009.

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In the cycloidal gear, the torque is transmitted to the planet gears via an eccentric shaft with central bearings mounted on it. A straight-line mechanism is used to output the torque from the planet gears to the output shaft, a mechanism which consists of rotational sleeves mounted on the pins rigidly connected to the output shaft disc. These sleeves roll off in the holes of the planetary wheel. The forces generated in the straight-line mechanism affect the distribution of forces in the cycloid gearing and the amount of force loading the central bearing. The article presents the influence of the number of bolts of the straight-line mechanism on the load distribution in the cycloidal gear. The research carried out with the simulation program has shown that the smaller the number of pins, the greater the fluctuation of the force acting in the central bearing and the greater unevenness of force distributions in the cycloidal gear. This unevenness may cause a decrease in fatigue life of the meshing and central bearings.
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Lei, Lei, Ying Tao, and Tian Min Guan. "Parametric Design of Cycloid Gear Based on SolidWorks." Advanced Materials Research 538-541 (June 2012): 3106–9. http://dx.doi.org/10.4028/www.scientific.net/amr.538-541.3106.

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In order to improve the efficiency and quality of design of complex parts, cycloid gear, in the pin-cycloidal transmission, this paper used SolidWorks to built accurately cycloid gear 3d model, and the VBA to program procedure for the secondary development, realized the parametric design of cycloid gear. Designer just enter the design parameters of cycloid gear , then gain the accurately generated cycloid gear 3d model rapidly , greatly improving the speed of cycloid gear design.
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Zhang, Ying Hui, Xiao Yu Wang, Wei Dong He, Feng Zhou, and Li Yang Hao. "The Precise Measurement Technology for Manufacturing Error of Cycloidal Gear Used in RV Reducer." Applied Mechanics and Materials 868 (July 2017): 334–39. http://dx.doi.org/10.4028/www.scientific.net/amm.868.334.

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According to problems in manufacturing and measuring process of cycloidal gear used in RV reducer, the profile coordinates of cycloidal gear captured by three coordinates measuring instrument Surveying and mapping do not coincide with the designed tooth profile coordinates in theory, it is difficult to precisely capture the addendum and dedendum of each cycloidal gear teeth, furthermore, the captured addendum and dedendum do not coincide with the actual tooth items. For these problems, this paper introduced a method can accurately calculating the manufacturing error of cycloidal gear.Based on the captured coordinate points of cycloidal gear tooth profile, firstly, find out 39 approximate addendums by calculating and comparing the radial radius of all points, divide the whole scanning points into 39 profile points groups by the 39 approximate addendums, with each group include a whole single tooth profile. Then, in each profile points group, interpolate the spline and precisely calculate the addendums and dedendums by fitting and recalculating radial radius.Set up the coordinate system of surveying and mapping profile by the 39 addendums. calibrate the coordinate system of surveying and mapping profile with the new coordinate system through coordinate transformation, calculate the radial runout error at top and root of tooth profile, pitch error, adjacent pitch error and accumulated pitch error as well as other manufacturing errors of the cycloidial gear at last.Through experiment, this process solve the problem in measuring process of cycloidal gear that the captured point by three coordinates measuring instrument could not be directly used for calculating the errors items.
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Aliyev, Alesker, and Aydan Qasimova. "PERSPECTIVES OF CYCLOID TRANSMISSION." ETM - Equipment, Technologies, Materials 05, no. 01 (January 20, 2021): 72–80. http://dx.doi.org/10.36962/etm0501202072.

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In modern mechanical engineering, transmissions with the use of an involute tooth profile are widespread. However, one of the main disadvantages of these transmissions is that they exposure to wear. In this study, research on the cycloid profile is conducted as an alternative option. Cycloid profiles are one of the profiles applied to the teeth in order to transmit motion. Although cycloid profiles are mainly used in instrumentation, satellites are made of cycloid profile in planetary gears. Cycloid profile teeth are less exposed to wear during operation. Practically, the shape of cycloidal teeth does not allow them to break, so there is no bending deformation in the teeth. In planetary gear transmission, the satellites are usually made of a cycloid profile. Cycloid profile teeth are exposed to less wear. Currently, planetary gear reducers are widely used mainly in the oil industry, drilling equipments, in the lifting mechanisms, gearboxes, on chain conveyors, rotary tables, in robotics, manufacturing, mechanical and chemical engineering fields and so on. The increased load capacity of the cycloid pinion gears is due to the multi-pair contact surface and it has a superior adhesion profile than the involute profile. The loading schemes of cycloidal and evolvent profile teeth shows that the normal force in contact Fn and its dangerous section on the tooth of the cycloidal profile is much less than in the case when the tooth has an involute profile. This is due to the fact that with cycloid profile transmission the number of teeth simultaneously transmitting the load is significantly greater than when implementing the same transmission with involute teeth. Cycloid profile gear reducers can be considered as a modern solution to current requirements such as high efficiency, smooth and quiet work, ability to accept short-term maximum loads, small overall size, minimum technical requirements etc. The simulation of the real load conditions and interference generated during the rotation of the shaft was developed in Solidworks in order to determine the contact stresses and the contact areas resulting from these stresses of the teeth of the gear and satellites of cycloid profile planetary gear reducers. This simulation determines the values of the teeth involved in the contact, the interference of those teeth, the contact areas and the contact stresses generated in these areas, depending on the angle of rotation of the shaft. The profile of the proposed teeth allows to achieve the minimum size with the maximum transmission ratio. Keywords: cycloid profile, cycloid transmission, planetary reducer, interference, simulation, contact area.
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Nachimowicz, Jerzy, and Stanisław Rafałowski. "Modelling the Meshing of Cycloidal Gears." Acta Mechanica et Automatica 10, no. 2 (June 1, 2016): 137–40. http://dx.doi.org/10.1515/ama-2016-0022.

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Abstract Cycloidal drives belong to the group of planetary gear drives. The article presents the process of modelling a cycloidal gear. The full profile of the planetary gear is determined from the following parameters: ratio of the drive, eccentricity value, the equidistant (ring gear roller radius), epicycloid reduction ratio, roller placement diameter in the ring gear. Joong-Ho Shin’s and Soon-Man Kwon’s article (Shin and Know, 2006) was used to determine the profile outline of the cycloidal planetary gear lobes. The result was a scatter chart with smooth lines and markers, presenting the full outline of the cycloidal gear.
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Petrovskiy, A. N. "Increased efficiency of eccentric cycloidal engagement." Proceedings of Higher Educational Institutions. Маchine Building, no. 9 (738) (September 2021): 3–14. http://dx.doi.org/10.18698/0536-1044-2021-9-3-14.

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Gears with eccentric cycloidal engagement have large gear ratios, small overall dimensions, low noise and vibration levels. A relatively low efficiency factor limits their use in transmissions mechanisms, where involute gearing with gear ratios up to 10 and high efficiency (over 0.98) are in demand. The power losses of the eccentric cycloidal engagement are caused by friction in the jointly working kinematic pairs, which are formed by the gear with at least half of the pins, and the latter form the pairs with axles or sockets in the housing. It is possible to reduce the power loss by reducing the number of jointly working kinematic gear-pin pairs, which is done by modifying the theoretical profile of the gear. The modified profile is obtained from the theoretical one by removing the tops of the protrusions so that the remaining parts of the profile provide a smooth transfer of the load to a given number of pins. The study introduces a method for calculating power losses and the efficiency of eccentric cycloidal gearing for theoretical and modified gear profiles. Findings of research show that the modification of the cycloidal gear makes it possible to reduce the power loss in the engagement by more than 60% and to increase the efficiency by 0.03 ... 0.04 without a significant decrease in the strength of the working surfaces. The obtained result confirmed the possibility of increasing the efficiency of eccentric cycloidal gearing for it to be used in transmissions of transport vehicles.
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OLEJARCZYK, Krzysztof, Marcin WIKŁO, Krzysztof KOŁODZIEJCZYK, Kazimierz KRÓL, and Renata NOWAK. "EXPERIMENTAL IMPACT STUDIES OF THE APPLICATION MINERAL OIL AND SYNTHETIC OIL ON THE EFFICIENCY OF THE SINGLE-GEAR CYCLOIDAL." Tribologia 271, no. 1 (February 28, 2018): 67–73. http://dx.doi.org/10.5604/01.3001.0010.6365.

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The paper presents a study of the impact of oil mineral-based and synthetic-based oils on the efficiency of the single stage cycloidal gear. Experimental studies were carried out for different loads and input speeds of the gears. The reference levels were the results of theoretical calculations of efficiency of the cycloidal gear obtained at the corresponding values of loads and input speeds as in the experiment.
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Wang, Junzheng, and Hongzhan Lv. "Modification and Optimization of Cycloidal Gear Tooth Profile Based on Machining Error Compensation." Applied Sciences 13, no. 4 (February 16, 2023): 2581. http://dx.doi.org/10.3390/app13042581.

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The rotary vector reducer presents high precision and load capacity characteristics. The shape of the cycloidal gear tooth profile in the rotary vector reducer significantly affects its performance. Meanwhile, the effect of the machining error on the error between the designed and theoretical tooth profiles cannot be ignored. Thus, this paper analyzes the machining error items that affect the shape of the cycloidal gear profile from the machining process perspective. Due to the random characteristics and different distribution rules inherent in various machining errors, this paper proposes a cycloidal gear machining error compensation and modification model based on the Monte Carlo simulation method, providing a new theoretical method for compensating cycloidal gear machining errors. While compensating for machining errors, considering the impact of cycloidal gear modification on the carrying capacity, the NSGA-Ⅱoptimization algorithm is utilized to optimize the cycloidal gear modification parameter and finally, to solve the modification parameters with a more comprehensive performance.
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Dissertations / Theses on the topic "Cycloidal gear"

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Li, Yawei, and Yuanzhe Wu. "Design of a cycloid reducer : Planetary stage design, shaft design, bearing design, bearing selection, and design of shaft related parts." Thesis, Linnéuniversitetet, Institutionen för teknik, TEK, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-19758.

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The RV reducer (one tpye of cycloid reducer) which has two stage transmissions is widely used in manyfields of engineering. This project is going to design the first stage of the RV reducer, as well as therelated components. The details contain design of input shaft, planetary gears, output shaft, generalbearings and eccentric bearings. The fatigue analysis is mostly used in the calculation process becausethe fatigue failure happens frequently in such rotation machine. In the same time, the general bearingsdesign is based on SKF General Catalogue and the eccentric bearings design is supported by theChinese standard.
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LIN, YOU-YONG, and 林祐永. "Research on Cycloidal Reduction Gear System." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/q64m2a.

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碩士
吳鳳科技大學
光機電暨材料研究所
105
The purpose of this thesis is about the calculation and size of the components of the cycloid in the reducer and to employ the resultant reducer into the production with the hope that it would fill another part of the market. The authors are interested in providing transmission for robust systems and various industrial purposes which requires a large proportion of reducer. Provided with the necessary input data, the model also runs a further analysis of the true recirculation reducer. In order to obtain the size and shape of the gears, some of the work of Professor Ognyan Alipiev has been used. Professor Alipiev is the Angel Kunchev at Institutional and Machine Theory Department, Lucas University, Bulgaria. In order to determine the force on components, models and drawings have been used through Solidworks (SW) CAD software and SW simulation environment. One can design by using the Resulant the process of calculation and determine both the geometrical shape and performance of the cycloidal reducer.
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Chiu, Cho-Chun, and 邱卓群. "Innovative Design and Analysis of Cycloidal Gear Reducers." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/54710155342605336648.

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碩士
國立臺灣大學
機械工程學研究所
100
Cycloidal gear reducers are commonly used for speed reduction where machine needs high reducing ratio and/or high torque drive. In the past decades, a great amount of research has been focused on the design of cycloidal gear reducers and many patents were also invented. Nonetheless, not much research has addressed the topological structure of the cycloidal gear reducers. In the first part of this thesis, the topology of the cycloidal gear reducer is analyzed first. Then structural characteristics of such mechanisms are investigated and summarized. Subsequently, a methodology for synthesizing new cycloidal gear reducer is proposed and new mechanisms are enumerated. In the second part of the thesis, the dynamic analysis of the reducer is conducted via Newton’s law and linear elasticity. Finally, the efficiency of reducer is studied when taking the inertia effect into account. The result shows that the cycloidal gear reducer is able to remain high torque when the mechanical energy varies.
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Sung, Ming-Jui, and 宋明芮. "THE CYCLOIDAL GEAR PROFILE COMPENSATION OF EXTRUSION MODEL." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/99r9r6.

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碩士
國立臺灣科技大學
機械工程系
107
At present, the common manufacturing method of cycloidal gears seen on the market is grinding after hobbing. The extrusion processing of cycloidal gears is a new research field. Although the manufacturing time is relatively short, it also has the disadvantage of difficult to control the size and accuracy, which has caused many troubles to the actual production. To solve the problem of the precision of extruded products, many people will use analysis software to simulate and analyze the situation of products after processing, and then amend it to reduce waste generation. But after simulation, the output drawings of the products show irregular triangular mesh, which makes the surveyors not know how to start. At present, there is no complete measurement method for this aspect. So this paper proposes DEFORM 3D triangular mesh tooth profile error evaluation and compensation to improve this situation. This paper first established several mathematical models, the cycloid gear and do the physical move, modification way equation is expressed. Then, with the help of these mathematical models, this paper will explain in detail how to use DEFORM 3D triangular mesh to evaluate and compensate tooth profile errors after extruding gear samples with simulated Workpiece, extract data points on a single cross-section from the samples and calculate their errors with theoretical values, so as to benefit further. The compensation of the left and right tooth surfaces of the lower die is calculated by the sensitivity matrix, and then the compensation correction is carried out subsequently. After that, a new cold extrusion simulation analysis process was established, especially the improved design of the lower and middle die of the extrusion die was more suitable for actual production and manufacturing. To verify the feasibility of the gear measurement and compensation method proposed in this paper, the details of the process setting and the experimental results will also be fully introduced in this paper.
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Dung, Pham Quang, and 范光勇. "The Study of the Structural Design of Cycloidal Gear." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/qmvpce.

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碩士
國立虎尾科技大學
機械與機電工程研究所
102
The cycloidal gear is widely used in many industrial application for speed and torque transmission purposes because the advantages of high efficiency, large ratios, compact design, long and reliable working life. A fine design about the geometry of the output shaft will decrease the stress concentration on the gear disc when transferring power. In this study, a computer program is developed for calculating the profile data of the cycloidal gear and export to Pro/E software to create a 3D cycloid mechanism module for dynamic analysis. The dynamic models considering friction, gear clearance and time-varying stiffness were established. The ANSYS/LS-DYNA is utilized to analyze the dynamic responses of gear transmission, surface contact stresses, root bending stresses, and contact stress of the output shaft of a cycloidal mechanism. The stiffness and elastic deformation of gear teeth are calculated by using the finite element method with actual geometry and positions of the gears. The modified suggestion of the geometry of the output shaft will be carry out by the results of dynamic simulation.
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HUANG, CHIN-CHEN, and 黃金振. "The Study of Optimum Design on Cycloidal Gear Tooth Profile." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/nba5v2.

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碩士
國立虎尾科技大學
機械設計工程系碩士班
107
The process of the cycloidal gear movement is driven by point contact, Therefore, if the tooth shape is poorly designed, the tooth surface of the cycloidal gear will be uneven during operation. The tooth surface wear is different and the transmission accuracy and service life are reduced. In order to make the tooth surface force close to uniform size. In this paper, the tooth surface is evenly stressed, Minimum tooth surface stress and Minimum tooth surface maximum stress wave front difference is the target. Use optimization analysis to achieve the above conditions and find the best parameter values from the process of optimization analysis. The main factors controlling the tooth profile of the cycloidal gear are two parameters of equidistant shape modification and distance modification. Write a toothed program by programming the software to control the two factors of equidistant shaping and shifting, Calculate the cycloidal gear parameters, To facilitate the shaping of the tooth profile, Optimized experimental planning with Design-Expert optimized software, Tooth shape control according to the equidistant shape modification and the distance correction parameter value obtained in the plan, And calculate the tooth shape and import it into the 3D software to build the three-dimensional model of the tooth profile and the three-dimensional model of the components of the planet carrier, the pin wheel and the eccentric shaft, And organize them. To simulate the position of the RV reducer, The constructed 3D assembly model is then imported into the HyperMesh preprocessor for finite element model partitioning, material property setting, coordinate system setting, initial condition setting, contact mode setting, constraint condition setting and output condition setting. Finally, the finite element analysis software LS-Dyna is used to calculate the tooth surface force. A total of 4 sets of experiments verifying the CAE analysis model were performed with subsequent tooth profile comparison with an accuracy of 97.8%. Finally, the optimized tooth profile has a maximum stress of 193.064 MPa at a distance of -0.005 mm and an equidistant 0.0047 mm. The tooth profile is used to regulate the maximum tooth stress of the Nabtesco RV-27C tooth profile to 188.09MPa. The accuracy between the two is 97.4%.
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Chen, Tse-Yu, and 陳冊宇. "Force Analysis and Finite Element Simulation of a Cycloidal Gear Reducer." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/21575906893065121931.

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碩士
國立臺灣大學
機械工程學研究所
101
Cycloidal reducers have been applied for the transmission mechanism in precision machine for a long time. Recently, the development of cycloid gear reducers has been focused on the high torque density design. In light of this trend, it is necessary to understand and explore the gear reducer in the force/torque aspect. This thesis first reviewed the methods of force analysis for cycloid gear reducers. Then, a method based upon the superposition method is proposed for the analysis of the contact force between cycloid lobe and pin. The results are compared with the results of FEM analysis as well as traditional force analysis method. This paper also presents the detail simulation process using the FEM software. The process shows that convergent results can be achieved by using the parameters selected in the thesis.
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Wu, Yi-Chen, and 吳懿真. "Tooth Contact Analysis of Cycloidal Gears." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/84430108340102189158.

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碩士
清雲科技大學
機械工程研究所
95
In this study, the mathematical models cycloidal gears are derived based on the theorem of gearing firstly. Then, the meshing model of cycloidal gear pair is set up and tooth contact analysis (TCA) is adopted to investigate the transmission errors with different design parameters and assembly conditions. Furthermore, the general-purpose FEA software, ABAQUS, was applied to evaluate the formation of bearing contacts and stress distribution on the tooth surfaces according to different design parameters. Results in this study not only verify the contact nature of cycloidal gear pairs, but also provide the bases for upcoming research on cycloidal gear pairs such as curvature analysis and sliding ratios.
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LUO, SHI-HONG, and 羅仕宏. "PRECISION EVALUATION OF TOOTH PROFILE FOR CYCLOIDAL GEARS." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/qw7652.

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碩士
國立臺灣科技大學
機械工程系
107
As factory production gradually evolves toward automation, robotic arm replacement is the current trend. Because the mechanical arm joint output is large, it is necessary to use a small volume and high-speed ratio precision reducer to increase the torque. Therefore, cycloidal gears with high gear ratio, small size, lightweight and low noise are often used in robot arms. The purpose of this paper is to develop the accuracy evaluation method of cycloidal gear and propose a mathematical model for accuracy evaluation. Firstly, the 2D point data of the tooth profile are imported, and all the measurement points are center-corrected by the conjugate gradient method, advance and retreat method and the golden section method in the one-dimensional search method. After that, using the B-spline curve fitting method to fit the measurement points, to ensure the fitting curve, the fitting error will be further calculated. After confirming the condition of the fitting error, the pitch radius is used to find the pitch points of the left and right tooth. The content of the evaluation of cycloidal gear in this paper is mainly divided into two parts. The first part is the evaluation of pitch error. The pitch error of the cycloidal gear can be evaluated using the found pitch points and the calculations defined by DIN. There are three calculation items for the pitch error evaluation according to DIN 3960[19], including single pitch error, accumulated pitch error, and run out. After calculating these pitch errors, the database can be further used to make a database using the evaluation level compiled by DIN3962 [20], and the database can be used to judge the accuracy level of the pitch errors. The second part is the calculation of the tooth profile and tooth thickness error. Before calculating the tooth shape error, the theoretical tooth profile and the pitch point of the fitting tooth profile must be coincident, and then the error of the fitting point and the corresponding theoretical point are calculated. The tooth thickness is subtracted from the fitted profile and theoretical one. Using the established method to evaluate the accuracy of commercially available products can be used as a basis for determining the manufacturing tolerance of cycloidal gears.
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Wang, Bo-Han, and 王柏翰. "Design and Analysis on Cycloid Reducer Gear." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/26122952031548179031.

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碩士
國立雲林科技大學
機械工程系
102
Cycloid reducer have many uses in industry, and is compact structure and with high efficiency speed reducer. Until now, for the study of cycloid reducer is to research its unique tooth profile. The formation of tooth profile have several ways, but for how to design a different gear ratio is not systematic design approach on cycloid reducer. This paper is proposed design method for different gear ratio of speed reducer and hope the backlash well minimum when speed reducer is rotation without interfering. For how to make the backlash to reduce method is adjusting the main parameters affecting the gear backlash to observe its changes, the most important that influence cycloid reducer have four factors. First, the arc radius of the ring gear, second, the distance from arc center of the ring gear to center of the ring gear, third, the arc radius of the cycloid gear, fourth, the distance form smaller arc center of the cycloid speed to center of the cycloid gear. By adjusting the size of the four factors to find the design parameters and make the backlash well minimum when speed reducer is rotation, and applied in gear ratio of 1:3, 1:5, 1:10, 1:15 speed reducer. Finally, using computer to design the CAD model and dynamic simulation software to simulate the movement of the situation, verify the accuracy of the size design.
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Book chapters on the topic "Cycloidal gear"

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Brovkina, Yu I., A. N. Sobolev, and A. Y. Nekrasov. "Research of Characteristics and Parameters of Cycloidal Gear." In Proceedings of the 4th International Conference on Industrial Engineering, 1169–79. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95630-5_122.

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Lebedev, Alexey, Sergey Kireev, Marina Korchagina, and Vitaly Lubinec. "Improvement of Design of Device for Production of Cycloidal Pinion Gear." In Smart Innovation, Systems and Technologies, 223–36. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-3844-2_24.

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Lebedev, Alexey, Sergey Kireev, Marina Korchagina, and Vitaly Lubinec. "Improvement of Design of Device for Production of Cycloidal Pinion Gear." In Smart Innovation, Systems and Technologies, 223–36. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-3844-2_24.

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Li, Guolong, Chenfa Wu, Yuan Pang, Bing Cao, and Quanfu Ran. "A Novel Piecewise Modification of Cycloidal Gear and Tooth Contact Analysis." In Advances in Mechanical Design, 1599–618. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-7381-8_98.

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Bednarczyk, Sławomir. "Determining Power Losses in the Cycloidal Gear Transmission Featuring Manufacturing Deviations." In Lecture Notes in Mechanical Engineering, 55–63. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-04975-1_7.

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Mo, Jingyu, Shanming Luo, and Kun Liu. "Design and Transmission Performance Analysis of a Novel Reducer with Abnormal Cycloidal Gear." In Lecture Notes in Electrical Engineering, 223–30. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-0572-8_28.

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Chmurawa, Manfred, and Antoni John. "FEM in Numerical Analysis of Stress and Displacement Distributions in Planetary Wheel of Cycloidal Gear." In Lecture Notes in Computer Science, 772–79. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/3-540-45262-1_91.

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Shi, Wei, Zhaojing Zhang, Yaxing Guo, Ruixian Yuan, and Jigui Zheng. "Design and Analysis of Harmonic Gear Transmission with Cycloid Modified Tooth." In Lecture Notes in Electrical Engineering, 478–90. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-6226-4_48.

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Liu, Yongxiang, Jinfu Du, and Kai Liu. "Digital Rolling Test of Cycloidal Hypoid Gears Based on Measuring Tooth Surface Data." In Advances in Mechanical Design, 1–15. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-7381-8_1.

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Trung, Nguyen Thanh, Phung Van Thom, and Nguyen Hong Thai. "The Design of the Compound Non-circular Gear Train Has an Internal Gears Pair with an Improved Cycloid Tooth Profile." In Advances in Engineering Research and Application, 910–23. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-22200-9_97.

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Conference papers on the topic "Cycloidal gear"

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Shih, Yi-Pei, Shih-Hung Lo, Bor-Tyng Sheen, and Yi-Hung Tsai. "Precision Evaluation for Cycloidal Gears." In ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/detc2019-97327.

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Abstract Cycloidal gear drives have advantages of compact sizes, large reduction ratios, and low backlash. They are particularly suitable for applications in precise positioning and large output torque, such as industrial robots and machine tools. Up to now, the effective precision evaluation of cycloidal gears is lacked in commercial measuring devices. The main goal of this paper is to propose precision evaluation for cycloidal gears. The research focuses on (1) establishing a mathematical model of cycloidal gear and (2) developing a method for precision evaluation of cycloidal gear. The evaluation items cover the following areas of tooth profile and thickness errors, pitch errors, accumulation pitch errors and runout. The profile points measured by a coordinate measuring machine are divided into tooth groups and then formulated as curves using a B-spline curve fitting technique. The precision of cycloidal gear can be further evaluated. A case study on Nabtesco RV-25N is displayed to verified the correctness of the proposed method.
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Stanasel, Iulian, Adrian Ghionea, Ionut Ghionea, Petru Ungur, and Oana Stanasel. "The Mathematical Model for the Generation of the Cylindrical Gear With Curved Cycloidal Teeth." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-34501.

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The performed studies regarding the cylindrical gears with curved teeth or in V showed that a uniform distribution of the load on the flanks is hard to realise, generally being necessary later finishing processing or modifying the gear by camber or flanking, which suppose supplementary expenses. On the basis of these mentions and taking into account the advantages of curved bevel gear, the purpose of this paper is to present an original study regarding the mathematical model for generation of a curved cylindrical gear with high performances. The cycloidal gear was chosen after a technical and an economical study regarding on the possibility of practical implementation with the lowest production costs using a special device, adapted on a Phauter processing machine of cylindrical gear. This was the main reason for choosing a cycloidal profile from several types of curved teeth (cycloidal arc, circle arc, Archimede’s spiral, involute arc). So, the main aim of the paper is to determine the equations of the flanks of cylindrical wheel with curved teeth in oblong cycloidal arc, in order to establish if the technical generation is possible. The curved cylindrical teeth with cycloidal flanks is generated by rolling with straight mobile line and continuous division by using a milling cutter with 1, 2, 3, 6 groups of knifes equidistantly placed, fixed on an adaptable device on a Phauter processing machine. The two curves which define the flank are simultaneously generated by correlated motions, and the flanks of the wheel part result as a roll of successive positions of generating hook materialized by the cutting edge of the tool. The shape of the contact curve between the conjugated surfaces of generating element and the wheel part can be obtained if you are taking into account the kinematic condition. Using this condition you can determine the relationship between the kinematic, geometric and technological parameters. The line of the flanks is studied in the reference plane and in parallel planes with this, and the profile of the flanks is determined in perpendicular planes on the work piece axis. Based on the parametric equations it was made the simulation program in MATLAB that indicates that this gears can be obtained, and constitutes the first step in practical manufacturing of this kind of gears. By analyzing the obtained shape they result useful conclusions for the manufacturing of the involute-tooth gear with curved oblong cycloidal arc. On the other hand, using Solid Edge it was made the spatial modeling of the cylindrical gear with curved cycloidal teeth that allows next FEA studies regarding on the contact and bending stress.
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CONCLI, FRANCO, LORENZO MACCIONI, and CARLO GORLA. "LUBRICATION OF GEARBOXES: CFD ANALYSIS OF A CYCLOIDAL GEAR SET." In MULTIPHASE FLOW 2019. Southampton UK: WIT Press, 2019. http://dx.doi.org/10.2495/mpf190101.

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Wang, Pei-Yu, and Chin-Chen Huang. "Influence of Cycloidal Gear Linear Shape on Contact Equivalent Stress." In 2018 IEEE International Conference on Advanced Manufacturing (ICAM). IEEE, 2018. http://dx.doi.org/10.1109/amcon.2018.8614799.

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Huang, Hailin, Ronghai Qu, and Jonathan Bird. "Performance of Halbach Cycloidal Magnetic Gears with Respect to Torque Density and Gear Ratio." In 2019 IEEE International Electric Machines & Drives Conference (IEMDC). IEEE, 2019. http://dx.doi.org/10.1109/iemdc.2019.8785259.

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Blanche, J. G., and D. C. H. Yang. "Cycloid Drives With Machining Tolerances: Part I — Kinematic Analysis." In ASME 1987 Design Technology Conferences. American Society of Mechanical Engineers, 1987. http://dx.doi.org/10.1115/detc1987-0076.

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Abstract The cycloidal speed reducer, or cycloid drive, is an epicyclic gear train in which the profile of the planet gear is an epitrochoid and the annular sun gear has rollers as its teeth. The cycloid drive has very high efficiency and small size, in comparison with a conventional gear mechanism, making it an attractive candidate for limited space applications. On the other hand, in this type of transmissions there exist two major drawbacks, namely, backlash and torque ripple Backlash, the angle through which the output shaft can rotate when the input shaft is held fixed, has a degrading effect on the output accuracy. Torque ripple, the variation in mechanical advantage as the input shaft rotates, causes vibrations and could lead to dynamic instability of the machinery. If the cycloid drive were manufactured to the ideal dimensions, there would be no backlash nor torque ripple. However, in reality, there will always be some machining tolerances. In this paper an analytical model is developed which models the cycloid drive with machining tolerances. This model is used in Part II of this investigation to determine the effect of machining tolerances on backlash and torque ripple. As a result, simple and practical equations for design synthesis of this type of drives are formulated.
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Shih, Yi-Pei, Bor-Tyng Sheen, Kun-Yu Wu, and Jyh-Jone Lee. "Transmission Errors and Backlash Analysis of a Single-Stage Cycloidal Drive Using Tooth Contact Analysis." In ASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/detc2018-85558.

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Cycloidal gear drives possess compact sizes, large reduction ratios, and low backlash. They are particularly suitable for applications in precise positioning and large output torque, for example, industrial robots and machine tools. Two main dynamic performances, transmission accuracy and backlash, is directly influenced by manufacturing errors. This paper aims to provide a direct method to effectively evaluate both performances. The mathematical models of transmission errors and backlash are established using the theory of gearing as well as tooth contact analysis. Three cases, considering profile modifications of the cycloidal gear and manufacturing errors, are evaluated to verify the correctness of the mathematical models.
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Davoli, Piermaria, Carlo Gorla, Francesco Rosa, Claudio Longoni, Franco Chiozzi, and Alessandro Samarani. "Theoretical and Experimental Analysis of a Cycloidal Speed Reducer." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-34098.

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Compared with common speed reducers, the cycloidal ones (also known as cycloid drives) cover a wider range of transmission ratios, have a higher load-carrying capacity, are smaller, exhibit a smoother running and a good efficiency. These characteristics make them attractive for industrial applications, especially for robotics applications, machine tools and linear axis positioning in assembly machinery. In this paper, a theoretical and experimental investigation on an innovative cycloidal speed reducer will be presented. The typical cycloid drive has a planet wheel, the profile of which is the inner offset of an epitrochoid, meshing with cylindrical rollers connected to the case. This reducer, on the contrary, has an external ring gear, the transverse profile of which is the external offset of an epitrochoid, and engages with the planet wheel by means of cylindrical rollers. This paper will investigate the structural characteristics and the kinematical principles of this type of reducer. A theoretical approach based on the envelope theory (following Litvin’s approach) will be developed and compared with a development of Blanche and Yang’s approach. Furthermore, a simplified procedure to calculate force distribution on cycloid drive elements, as well as its power losses and theoretical mechanical efficiency will be presented. The effects of design parameters on the values of the forces will be studied, for an optimal design of this type of reducer. The theoretical model will be then tuned using the results of tests on a specific rig. As a result of the experimental tests, the reducer mechanical efficiency dependency on speed and torque will be described. The aim of this work is to perform the fine tuning of a theoretical model in order to predict the operating behavior of the cycloid drive, and to improve its design procedure.
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Ishida, Takeshi, and Teruaki Hidaka. "Effects of Assembly and Manufacturing Errors on Transmission Error of Planetary Gears." In ASME 1992 Design Technical Conferences. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/detc1992-0047.

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Abstract Transforming 2K-H type planetary gears with three planet gears into an equivalent model with many degrees of freedom, in a plane perpendicular to the input and output shafts, the loci of the displacement of a floating sun gear were analyzed theoretically by using the equivalent model. The theoretical locus of the displacement of the sun gear was nearly identical to the experimental one. K-H-V type planetary gears have been used as the reduction gears in the industrial robot, and have desired to decrease the transmission error between the input and output shafts for increasing the positioning accuracy of the robot. The K-H-V type planetary gears composed of a sun gear for the input, three planet gears, three crankshafts, two disks with cycloidal teeth, an internal gear with pin type teeth, and a carrier for the output were also transformed into the equivalent model in the same manner as the 2K-H planetary gears, and the effects of manufacturing and assembly errors of elements on the transmission error were determined theoretically.
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Robison, Andrew J., and Andrea Vacca. "Multi-Objective Optimization of Modified Cycloidal-Toothed Gerotor Pumps by Genetic Algorithm." In ASME/BATH 2019 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/fpmc2019-1696.

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Abstract Cycloidal-toothed gerotors are formed by the combination of epicycloid and a hypocyloid arcs that use the pitch circles as their base circles. They are a common profile type used in industry likely because they can be generated by simple parametric equations. One of the problems with the cycloidal-toothed profile type is that the radius of curvature of both the inner and outer gear are zero when the gears contact at the pitch point which can lead to high contact stress. A gear generation algorithm has been developed that modifies the hypocycloid tooth form to eliminate contact in regions with very low radii of curvature that is yet to be described in scientific literature. Seven performance metrics are developed to evaluate size, flow ripple, adhesive wear, contact stress, radial gap leakage, lateral gap leakage, and inlet throttling that are used as objective functions in a multi-objective optimization. The pump geometry is optimized by applying the NSGA-II algorithm with a population size of 1000 for 500 generations to produce a pareto front, and the results are compared to two cycloidal-toothed gerotors used in the automotive industry. Two designs were found that significantly reduce the contact stress in the profiles while giving the same performance in the other six objective functions in comparison to the profiles used in industry. Another two designs are found that can significantly reduce several objective functions if the size of the pump can be increased slightly.
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Reports on the topic "Cycloidal gear"

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Internal High Ratio Gear Rotary Actuator with Involute Profile for Variable Compression Ratio Systems. SAE International, September 2021. http://dx.doi.org/10.4271/2021-01-5091.

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This paper introduces an internal high ratio gear system with eccentric movement using an involute tooth profile but not the commonly used cycloidal gear profile, and a solution deemed particularly suitable for variable compression ratio actuators. The design challenges of these rotary actuators are discussed, contact ratio values exhibited, and efficiency measurements shown.
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