Theoretical and Experimental Study for An Improved Cycloid Drive Model

Abstract

This paper describes an experimental and theoretical approach to evaluate cycloid drive reducer efficiency. The tests are carried out on 7.5 kW two-disc cycloid drive with a gear ratio of 19. The torque and speed are measured on the input and output shaft. The efficiency is calculated based on the obtained results. The main goal of the second part of the study is to deduce equations of cycloid reducer in order to predict and analyze experimental results. In this way, the following points are set for the simulation: a working condition in which the input speed and the output load are imposed; then, the output speed is determined by the gear ratio, and finally, the input torque is obtained by solving the dynamic problem. A new model for cycloidal reducers is proposed. This model is based on kinematics and dynamics of rigid bodies and a non-linear stiffness based on contact dynamics. The overall elasticity effects are all condensed between the input shaft and the cycloidal disk. The proposed model allows to predict the efficiency for several operational conditions and offer a drastic reduction of computational costs suitable for the optimization process.

Review on vibration test and fault analysis of rv reducer

“…Due to the complex and tight structure of the cycloidal wheel of the RV reducer, dismantling the reducer and reinstalling it will cause the accuracy to drop. At present, there are only three types of fault detection methods for the RV reducer, namely vibration analysis [7], demography analysis [8], and acoustic emission analysis [9][10] three methods, as shown in Figure 5. For vibration analysis, sensors are usually placed at the reducer housing for signal acquisition.…”

Design and Analysis of a Novel Actuator with a Double-Roller Gear Drive

“…actual situation [27]. Pablo López García et al proposed an evaluation criterion strongly constrained by HRI applications and used it to evaluate the performance of traditional and emerging robot transmission technologies, particularly in terms of weight and efficiency [28].…”

“…A compact low deceleration cycloidal transmission has been developed that is low-cost, capable of 3D printing, and uses ready-made bearings and steel structures [26]. Jea-Luc set up a theoretical approach for estimating cycloidal gear reducers' effectivenesses; after experimental verification, the error was relatively small compared to the actual situation [27]. Pablo López García et al proposed an evaluation criterion strongly constrained by HRI applications and used it to evaluate the performance of traditional and emerging robot transmission technologies, particularly in terms of weight and efficiency [28].…”

A Semi-Analytical Load Distribution Model for Cycloid Drives with Tooth Profile and Longitudinal Modifications

“…Tooth profile modification (TPM) of cycloid gears is necessary to compensate for errors in assembly and manufacture and to provide better lubrication conditions [8]. Profile modification is considered to have significant effects on the backlash, transmission error, contact strength, and torque ripple of cycloid drives [5,15,22], which should be investigated qualitatively and quantitatively via parametric sensitivity analysis.…”

“…where the pressure distributed in the contact region must be non-negative. The above linear Equations (20) and (22) with the boundary condition can be solved simultaneously to obtain the contact region, contact deformation, and contact stress. Thus, the tooth compliance of the cycloid gear pairs can be represented as…”