In the case of TV products, space constraints and design requirements make it advantageous to use a worm gear that has a small volume and a self-locking function. Single enveloping worm gear teeth are classified as ZA, ZN, ZK, ZI, and ZC according to international standards. However, combining worm shafts and worm wheels with different tooth profiles can significantly worsen meshing transmission errors and reduce the lifespan of the worm gear. Despite these challenges, due to processing limitations, ease of manufacturing, and cost reduction, combinations of worm shafts and worm wheels with different tooth profiles are still considered. In this study, we confirmed the meshing transmission error for a worm gear that combined a ZA tooth shape worm shaft with a ZI tooth shape worm wheel. Additionally, we examined the contact stress and fatigue life characteristics of the material combinations using finite element analysis (FEM).
Nowadays, noise, vibration, and harshness (NVH) is a comprehensive issue related to manufacturing quality, it gives the purchaser the most direct and superficial feeling. Following economic development, the improvement of people’s living standards, and the expansion of the export market, it has become urgent to develop and produce some better NVH performance motorcycles. In this paper, the transmission of a scooter gearbox is modeled and analyzed by software. Then, the first helical gear pair of the gearbox was investigated through static analysis. Lastly, optimized modification was verified using B&K testing equipment in the semi-anechoic room. The comparison of the simulation to prototype during testing showed a good correlation, which means simulation optimization can greatly improve the research and development efficiency of the transmission system.
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A Study on the Optimum Design of Planetary Gear Train for Air-Starting Motor Nam-Yong Kim, Seong-Bae Park, Sung-Ki Lyu Journal of the Korean Society of Manufacturing Process Engineers.2022; 21(12): 135. CrossRef
Performance Test for a Multi-stage Planetary Gear Module in a Hydraulic Winch Kyu Tae Park, Young Rak Yoo, Jong-Hak Lim, Sung-Hoon Kim, Ho Seong Lee, Chul Ki Song Journal of the Korean Society of Manufacturing Process Engineers.2020; 19(10): 31. CrossRef
A Study on the Optimal Design of Drive Gear for Transfer Gearbox MyeongJin Song, MyeongHo Kim, Zhen Qin, DongSeon Kim, NamSool Jeon, SungKi Lyu Journal of the Korean Society for Precision Engineering.2019; 36(2): 121. CrossRef
Study on the Reduction of Gear Whine Noise in Diesel Engine Gear Train Qi Zhang, Yong Bo Wang, Jian Hua Lv, Zhong Gang Zhu, Zhen Qin, Sung Ki Lyu Journal of the Korean Society for Precision Engineering.2019; 36(9): 867. CrossRef
A popular approach to optimize the performance of a gear transmission system is the modification of the gear tooth microgeometry, which includes the intentional removal of material from the gear teeth flanks, so that the shape is no longer a perfect involute. Such modifications compensate teeth deflections under load, and the resulting transmission error is minimized under a specific torque. Therefore, micro-geometry modifications can be applied on the involute (or profile) and lead of the gear teeth. In order to study the tooth micro-geometry optimization, this research selected a mass produced planetary gear type drive reducer as a prototype. The original design was modeled by a commercial software named Romax Designer, which analyzes and optimizes different types of gear power transmission systems. The series analysis results obtained reveal some anomalies that require modification. Based on the result, optimization and gear tooth modification were done to deal with the load distributions on gear tooth, gear durability problem, safety factor and bearing life problem. This thesis presents the outstanding performance improvement obtained after such optimization.
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Development of a Prediction Model for the Gear Whine Noise of Transmission Using Machine Learning Sun-Hyoung Lee, Kwang-Phil Park International Journal of Precision Engineering and Manufacturing.2023; 24(10): 1793. CrossRef
Influence of Open Differential Design on the Mass Reduction Function Mirko Karakašić, Pejo Konjatić, Hrvoje Glavaš, Ivan Grgić Applied Sciences.2023; 13(24): 13300. CrossRef
Large Curvic Coupling Gear for Ultraprecision Angle Division Using FEM Yoon-Soo Jung, Jia-Chen Gao, Gyung-Il Lee, Ku-Rak Jung, Jae-Yeol Kim International Journal of Precision Engineering and Manufacturing.2021; 22(3): 495. CrossRef
A Review of Recent Advances in Design Optimization of Gearbox Zhen Qin, Yu-Ting Wu, Sung-Ki Lyu International Journal of Precision Engineering and Manufacturing.2018; 19(11): 1753. CrossRef
Simulation and Experimental Analysis for Noise Reduction of a Scooter Gearbox Qi Zhang, Jing Zhang, Zhong Hua Liu, Jian Hua Lv, Zhen Qin, Sung Ki Lyu Journal of the Korean Society for Precision Engineering.2018; 35(8): 777. CrossRef
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