Recently, bicycles are used as exercising machines and traffic vehicles. Planetary gear trains can be used as the transmission systems for bicycles. The purpose of this work is to propose a design methodology for the kinematic design of automatic gear transmissions with planetary gear trains for bicycles. First, applying the check list method (combining and extending methods), the design concep...

Recently, bicycles are used as exercising machines and traffic vehicles. Planetary gear trains can be used as the transmission systems with multi-speed for bicycles. The purpose of this work is to propose a design methodology for the design of automatic three-speed gear hubs with planetary gear trains for bicycles. First, applying the check list method (combining and extending methods), the des...

Planetary Gear Trains are extensively used for the power transmission. Large reduction in a small volume is possible with planetary gear trains. High efficiency – 95% per stage is common in planetary gear trains. For the automation of car parking systems helical gear box is used. But requirements of the gear box of these kind shall be compact in size and should have high efficiency. For these r...

Gear design optimization consists of several objectives such as centre distance, weight, fatigue strength, tooth deflection depending on the requirements. Among these objectives the weight of a gear train is one of the best considerable designs, since many power transmission applications require low weight. The advanced optimization technique, Genetic Algorithm (GA) is used to find the optimal ...

An optimization model is constructed to select the optimum reduction ratios that minimize the total angular backlash of a gear train, under constraints on the total reduction ratio and available space. It is found that a proper layout of reduction ratios has a major eVect on the total angular backlash of a gear train.

This paper describes a methodology for the drive train configuration arrangement of gear coupled manipulators. The approach is based on the idea that the kinematic structure of a gear coupled manipulator can be described by an equivalent open-loop chain (EOLC) and mechanical power transmission lines that drive the EOLC. Conditions to select proper drive train configuration such that manipulator...

A dynamic model of multiple-stage planetary gear train composed of a two-stage planetary gear train and a one-stage parallel axis gear is proposed to be used in wind driven generator to analyze the influence of revolution speed and mesh error on dynamic load sharing characteristic based on the lumped parameter theory. Dynamic equation of the model is solved using numerical method to analyze the...

Dexterous robot hand development is a very challenging and interesting research topic. A dexterous robot hand may serve as a prosthesis hand for disabled patients or to serve as a gripping device for robotic arms. In most of previous studies, the dexterous robot hands are developed based on the directed gear train controls and tendon wired controls. The directed gear train control based design ...

Optimization of the volume/weight in the gear train is of great importance for industries and researchers. In this paper, using the particle swarm optimization algorithm, a general gear train is optimized. The main idea is to optimize the volume/weight of the gearbox in 3 directions. To this end, the optimization process based on the PSO algorithm occurs along the height, length, and width of t...