Contact characteristics of cycloid planetary gear drives considering backlashes and clearances

2021 ◽  
Author(s):  
Ling-Chiao Chang ◽  
Shyi-Jeng Tsai ◽  
Ching-Hao Huang
Keyword(s):  
Planetary Gear ◽  
Gear Drives

scholarly journals Dynamic Behaviour of Planetary Gear Drives : 2nd Report, Displacement of Sun and Internal Gears

1976 ◽  
Vol 42 (356) ◽  
pp. 1281-1288
Author(s):  
Teruaki HIDAKA ◽  
Yoshio TERAUCHI ◽  
Kunio ISHIOKA
Keyword(s):  
Dynamic Behaviour ◽  
Planetary Gear ◽  
Gear Drives

Improved Genetic Optimization of Electric Motorcycle Planetary Transmission

2012 ◽  
Vol 246-247 ◽  
pp. 164-168
Author(s):  
Pei Lin Yu ◽  
Wang Yong
Keyword(s):  
Planetary Gear ◽  
Optimization Method ◽  
Gray Code ◽  
Gear Transmission ◽  
Design Parameters ◽  
Preliminary Design ◽  
Genetic Optimization ◽  
Gear Trains ◽  
Planetary Transmission ◽  
Gear Drives

Determination of dedendum circle diameter of ring gear in planetary gear drives is an important issue in preliminary design of electric motorcycle transmission. Genetic optimization is used to automate preliminary design of gears by minimizing volume of gear trains. An improved genetic optimization method was applied to a planetary gear transmission of electric motorcycle. Gray code way was applied in variable binary strings for improve research efficiency. Dynamic penalty functions were introduced to the objective function for handing the design constraints. The results were compared with a enumeration method usually applied. Improved GA produced quite well results promptly supplying design parameters of a planetary gear transmission.

Use of the Integrated Flexpin Bearing for Improving the Performance of Epicyclical Gear Systems

2003 ◽  
Author(s):  
Gerald P. Fox ◽  
Eric Jallat
Keyword(s):  
Power Density ◽  
Planetary Gear ◽  
Load Sharing ◽  
Contact Patterns ◽  
Length Direction ◽  
Gear Systems ◽  
Planetary Gear System ◽  
Gear Contact ◽  
Gear Drives ◽  
Deflected State

Epicyclical gear systems have typically been equipped with straddle-mounted planetary idlers having pins supported on the input and output sides of the carrier. Torsional wind-up of the carrier, position accuracy of the pins, machining tolerances of the planetary gear system components and bearings clearances can all contribute to a poor load sharing among the planetary idlers as well as misaligned gear contacts in the deflected state. Use of the double-cantilevered flexible pin concept to achieve better load sharing and gear contact patterns among a multiplicity of planetary idlers, has been used to improve reliability in advanced gear drives for many years. The consequence of this practice is to build a compliant epicyclical system that improves power density in the gear length direction because the probability of achieving a properly centered gear contact is increased. The Integrated Flexpin Bearing, the subject of this paper, is capable of achieving additional power density in the gear diameter direction through integration of bearing components, gearing and shafting. This paper presents one designer’s approach to optimizing an Integrated Flexpin Bearing to improve the reliability of an epicyclical gearbox.

Design of cycloid planetary gear drives with tooth number difference of two

2017 ◽  
Vol 81 (2-3) ◽  
pp. 325-336 ◽  
Author(s):  
Shyi-Jeng Tsai ◽  
Ling-Chiao Chang ◽  
Ching-Hao Huang
Keyword(s):  
Planetary Gear ◽  
Tooth Number ◽  
Gear Drives

Manufacturing of Cycloid Tooth Profile for RV and Cyclo Drives by Threaded Wheel Hobbing and Grinding

2019 ◽  
Vol 825 ◽  
pp. 106-113
Author(s):  
Ling Chiao Chang ◽  
S.J. Tsai ◽  
Jia Sheng Wei ◽  
Pin Ching Chen
Keyword(s):  
Planetary Gear ◽  
Gear Ratio ◽  
Tooth Profile ◽  
Grinding Wheel ◽  
Axial Section ◽  
Precision Motion ◽  
Gear Drives ◽  
Synthesis Approach

Cycloid planetary gear drives are widely used in power and precision motion transmission because of high gear-ratio and good shock absorbability. The aim of the paper is to propose a synthesis approach to generate necessary profiles for manufacturing with thread-wheel type tools based on a given cycloid tooth profile. Two different cases are illustrated in the paper to calculate these profiles, the profiles of thread wheel on normal or axial section, the equivalent rack profile, as well as the profile of dressing or grinding wheel for grinding or hobbing.

Investigation of the Noise and Vibration of Planetary Gear Drives

2003 ◽  
Author(s):  
Yong Chen ◽  
Akira Ishibashi
Keyword(s):  
Phase Difference ◽  
Planetary Gear ◽  
Experimental Results ◽  
The Sun ◽  
Noise And Vibration ◽  
Helical Gears ◽  
Automatic Transmissions ◽  
Gear Drives

With the aim of reducing the operating noise and vibration of the planetary gearsets used in automotive automatic transmissions, a meshing phase difference was applied to the planet gears that mesh with the sun and ring gears. Shaved and hardened helical gears with and without grinding were used as the component gears that were tested under varying rotational speeds and tooth loads. The experimental results clearly showed that planetary gearset noise and vibration were reduced when a meshing phase difference was applied.

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