Abstract
This paper presents a new transmission mechanism with multistage face gears as the core components for realizing variable speeds with differential meshing. To improve face gear transmission smoothness, suppress meshing resonance, reduce noise, and optimize power transmission performance during the gear shifting process, load distribution between meshing teeth during the transmission process and impact loads during various shifting stages must be determined. Herein, we present a gear impact model considering double crown gear meshing configuration, contact deformation, variable working conditions, and jump impact at meshing points. A single-stage face gear pair is considered as object that the impact characteristics are comparatively studied under four conditions: with/without load and constant/variable speed. The results were used to analyze transient characteristics of the crown gear under contact deformation or frequent shifting impact. Based on this, the impact characteristics of multistage face gear pairs between ratio switching were extendedly investigated under four input conditions: constant/variable torque or constant/variable speed. The results were used to determine the meshing force and impact force fluctuation characteristics of multistage face gear pairs while adapting to various loads and continuous acceleration/deceleration. The proposed model can be beneficial to evaluate the feasibility of multistage gear structures with crown configuration and to obtain boundary conditions for transmission systems.
Highlights
Multistage face gears need to adapt to the conditions of heavy load, high speed, and variable load, in order to improve the reliability of transmission system under the extreme conditions such as impact and slide during shifting process [1]
Wang systematically investigated the effect of transient squeezing on the performance of spiral bevel gears with and without real machined surface roughness, which was compared with the corresponding steady-state elastohydrodynamic lubrication (EHL) results. e results reveal that the transient squeezing
A gear impact characteristic model was established in this paper
Summary
Xingbin Chen ,1,2,3 Xinhe Min, Peng Zhang, Nini Li, Zhihong Zhong, and Yuansheng Wu1,3. Is paper presents a new transmission mechanism with multistage face gears as the core components for realizing variable speeds with differential meshing. We present a gear impact model considering double crown gear meshing configuration, contact deformation, variable working conditions, and jump impact at meshing points. A single-stage face gear pair is considered as object that the impact characteristics are comparatively studied under four conditions: with/without load and constant/variable speed. E results were used to analyze transient characteristics of the crown gear under contact deformation or frequent shifting impact. E results were used to determine the meshing force and impact force fluctuation characteristics of multistage face gear pairs while adapting to various loads and continuous acceleration/deceleration. E proposed model can be beneficial to evaluate the feasibility of multistage gear structures with crown configuration and to obtain boundary conditions for transmission systems The impact characteristics of multistage face gear pairs between ratio switching were extendedly investigated under four input conditions: constant/variable torque or constant/variable speed. e results were used to determine the meshing force and impact force fluctuation characteristics of multistage face gear pairs while adapting to various loads and continuous acceleration/deceleration. e proposed model can be beneficial to evaluate the feasibility of multistage gear structures with crown configuration and to obtain boundary conditions for transmission systems
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