A modelling approach for kinematic equivalent mechanism and rotational transmission error of RV reducer

2021 ◽  
Vol 163 ◽  
pp. 104384
Author(s):  
Yuhu Yang ◽  
Guocheng Zhou ◽  
Le Chang ◽  
Gang Chen
Keyword(s):  
Transmission Error ◽  
Rv Reducer ◽  
Modelling Approach ◽  
Equivalent Mechanism

Research on Transmission Error Test and Analysis of RV Reducer

2019 ◽  
Author(s):  
Zhonggang Zhu ◽  
Jing Zhang
Keyword(s):  
Data Acquisition ◽  
Test Data ◽  
Optimization Design ◽  
Transmission Error ◽  
Test Results ◽  
Test Device ◽  
Filtering Method ◽  
Processing Program ◽  
Rv Reducer ◽  
Data Acquisition And Processing

Abstract Aiming at exactly measuring the transmission error of RV reducer, a set of test device is developed and the data acquisition and processing program is designed using LabVIEW. RV reducers from imported and domestic brands are tested and the test results are compared. The test data is also processed by the filtering method, and the result can show the main source of the transmission error, which providing a reliable reference in the process of optimization design and improving of manufacture technics.

Influencing Factors on Rotate Vector Reducer Dynamic Transmission Error

2019 ◽  
Vol 13 (4) ◽  
pp. 545-556 ◽  
Author(s):  
Shou-Song Jin ◽  
◽  
Xiao-Tao Tong ◽  
Ya-Liang Wang
Keyword(s):  
Influencing Factors ◽  
Elastic Deformation ◽  
Great Influence ◽  
Simulation Method ◽  
Transmission Error ◽  
Dynamics Simulation ◽  
Load Fluctuation ◽  
Circle Center ◽  
Dynamic Transmission Error ◽  
Rv Reducer

The factors influencing rotate vector (RV) reducer dynamic transmission error were studied using virtual prototyping technology, which contained the elastic deformation, working load, part manufacturing error, and assembly clearance. According to the error transmission relationship of the RV reducer, 15 influencing factors were selected to design an orthogonal simulation test. The virtual prototype of the RV reducer was built using CREO and ANSYS, and imported into ADAMS for multi-body dynamics simulation. The simulation method reliability was verified via experiments. The results show that the circle center radius error of the pin gear, the amount of equidistant modification of the cycloid gear, the amount of radial-moving modification of the cycloid gear, the clearance between the support bushing and planet carrier, and the clearance between the crankshaft and the support bushing were positively correlated with the RV reducer dynamic transmission error. Among these, the circle center radius error of the pin gear has the greatest influence on the dynamic transmission error of the RV reducer followed by the amount of equidistant modification of the cycloid gear. The elastic deformation of the part and the load fluctuation show a certain gain effect on the transmission error, the elastic deformation of the cycloid gear has a great influence, and the elastic deformation of the pin gear has the least.

Design and Transmission Error Analysis of CBR Reducer

2019 ◽  
Vol 141 (8) ◽  
Author(s):  
Xiaoxiao Sun ◽  
Liang Han ◽  
Jian Wang
Keyword(s):  
Contact Force ◽  
Mathematic Model ◽  
Transmission Error ◽  
Hysteresis Curve ◽  
Harmonic Drive ◽  
Tooth Contact Analysis ◽  
Advantages And Disadvantages ◽  
Modified Method ◽  
Rv Reducer ◽  
Testing Bench

A new one-stage type cycloid drive reducer named China Bearing Reducer (CBR) is designed and its tooth contact analysis is investigated. First, the CAD model is built in SolidWorks and the structure of CBR reducer is introduced. Its advantages and disadvantages are compared with rotor vector (RV) reducer and harmonic drive reducer. Second, the mathematic model of cycloid profile and modified cycloid profile are established based on gear meshing and differential geometry, and the tooth shapes of three different modifications are compared with CBR25 reducer. Third, the conventional TCA method is described and a new TCA method by using discretized points is proposed to calculate transmission error and contact force of cycloid drive. Both the methods are used to compute the unloaded transmission error of CBR25 reducer to compare the computational efficiency. Finally, three different modified methods of tooth profile are investigated by using the new TCA method to calculate transmission error and contact force of CBR25 reducer, and the results show that the negative isometric and negative offset modified method is best for CBR25 reducer to reduce transmission error and contact force. The prototype of CBR25 reducer is manufactured and the transmission error and hysteresis curve are measured by using a testing bench. The results show that the new TCA method can be used to calculate transmission error and help better design the CBR reducer.

Virtual Prototype Simulation and Transmission Error Analysis for RV Reducer

2015 ◽  
Vol 789-790 ◽  
pp. 226-230 ◽  
Author(s):  
Ying Hui Zhang ◽  
Zhuo Chen ◽  
Wei Dong He
Keyword(s):  
Transmission Error ◽  
Rate Acceleration ◽  
Adams Software ◽  
Body Dynamics ◽  
Rv Reducer ◽  
Acceleration Force ◽  
Rigid Model ◽  
Definition Of ◽  
And Function ◽  
Multi Body

Based on the multi-body dynamics theory, paper builds the virtue prototype of the RV reducer with Adams software. By apply the cycloid gear equation with modification to create the backlash between cycloid gear and the pin gear. Build the backlash model between eccentric shaft and bearing with definition of constraint and function method. By using the MNF file to consider the deformation of the cycloid, pin gear and planet carrier. The dynamic flexible-rigid model of the coupled RV reducer was established. Then output curves of rotation rate, acceleration, force and angle inaccuracy were conducted. Then change the value of the backlash and to study its effect on the transmission error.The simulation results of the RV reducer provides the foundation for the further study of the precision analysis.

Analysis of Nonlinear Dynamic Accuracy on RV Transmission System

2012 ◽  
Vol 510 ◽  
pp. 529-535 ◽  
Author(s):  
Li Jun Shan ◽  
Yu Ting Liu ◽  
Wei Dong He
Keyword(s):  
Transmission Error ◽  
Transmission System ◽  
Torsional Stiffness ◽  
Mesh Stiffness ◽  
Concentrated Mass ◽  
Input Shaft ◽  
Dynamic Accuracy ◽  
Rv Reducer ◽  
Bearing Stiffness ◽  
Static Transmission Error

RV (Rotate Vector) transmission is a new precision transmission system. In order to improve its accuracy, we study the RV transmission system. It is researched in comprehensive factors including displacement errors, elastic deformation (static transmission error, design transmission error), gear meshing errors, backlash of gear, time-varying mesh stiffness, mesh damping, bearing stiffness, torsional stiffness of input shaft, etc. The mathematical and mechanical model of dynamic transmission accuracy is established by the concentrated mass method and the dynamic substructure method. Then, the meshing force of each part is analyzed in RV reducer. The motion differential equation of RV drive system is obtained, which lays the foundation for the calculation and analysis of the transmission error.

scholarly journals Optimal Measurement Speed and Its Determination Method in the Transmission Precision Evaluation of Precision Reducers

2019 ◽  
Vol 9 (10) ◽  
pp. 2146 ◽  
Author(s):  
Hang Xu ◽  
Zhaoyao Shi ◽  
Bo Yu ◽  
Hui Wang
Keyword(s):  
Objective Evaluation ◽  
Transmission Error ◽  
Friction Model ◽  
Friction Torque ◽  
Determination Method ◽  
Optimal Measurement ◽  
Low Speed ◽  
Transmission Errors ◽  
Precision Evaluation ◽  
Rv Reducer

Transmission error is the key index for characterizing the transmission precision of precision reducers, and its accurate measurement is significant for the precision evaluation of precision reducers. Transmission error is generally measured under the conditions of zero-load and low speed. However, low speed is a general concept and there is no general standard of measurement speed or solid scientific basis. Therefore, it is difficult to obtain consistent transmission precision evaluation results for the same precision reducer. The concept of optimal measurement speed in the transmission precision evaluation of precision reducers was put forward in order to reduce the influence of measurement speed. The determination method of optimal measurement speed was proposed and the calculation model of the optimal measurement speed was established, according to the Stribeck friction model of precision reducers. Taking a certain type of RV reducer as an example, the transmission error measurement experiments were carried out under different speeds. The friction torque of the RV reducer and the peak-to-peak value of the measured transmission error were the least under the optimal measurement speed. The influence of speed on the measurement results can be effectively reduced. The determination of optimal measurement speed of transmission errors could improve the measurement precision of the transmission errors for the objective evaluation of transmission precision of precision reducers.

Sign in / Sign up

Export Citation Format

Share Document