Design and experimental study of a planetary gearing mechanism based on twice unequal amplitude transmission ratio

Jiangang Liu, Gaohong Yu, Zhipeng Tong, Yao Hua

Abstract


To obtain the optimal seedling taking trajectory, this study proposed the adjustment of the total transmission ratio curve by using human-computer interaction. On the basis of this design method, a planetary non-circular gear mechanism was designed that can realize the twice unequal amplitude transmission ratio to meet the seedling harvesting requirements. The cubic non-uniform B-spline curve was used to fit the twice unequal amplitude transmission ratio curve, and the transmission ratio was freely distributed in two levels. The seedling pick-up mechanism was designed by controlling the seedling taking track and the corresponding attitude directly through the local section of the total transmission ratio, and the gear pitch curve was directly controlled by the transmission ratio. The kinematics model of the seedling pick-up mechanism was also established. Furthermore, the influence of the total transmission ratio on the seedling picking track, the ratio of the wave crest to the amplitude, and the mechanism parameters were discussed. A human-computer interactive optimization software was developed using Matlab, and a set of optimal parameters for the seedling pick-up mechanism was obtained to meet the transplanting requirements. By using the Adams software, the virtual prototype simulation of the seedling pick-up mechanism was completed, and the idle experiment for the track and attitude of the prototype was conducted through high-speed camera technology. The theoretical, simulated, and experimental trajectories were consistent with each other. Results revealed that the success rate of the seedling picking exceeded 90% when the rotation speeds were 40 r/min, 50 r/min, and 60 r/min, and the qualified rate of the matrix decreased with the increase in rotating speed. Moreover, the number of damaged plants increased with the increase in rotating speed. The experimental results showed that the seedling pick-up mechanism designed using the proposed method demonstrated a good effect and met the required seedling picking performance.
Keywords: seedling pick-up mechanism, second unequal amplitude, planetary gear train, seedling picking experiment
DOI: 10.25165/j.ijabe.20221501.6168

Citation: Liu J G, Yu G H, Tong Z P, Hua Y. Design and experimental study of a planetary gearing mechanism based on twice unequal amplitude transmission ratio. Int J Agric & Biol Eng, 2022; 15(1): 155–163.

Keywords


seedling pick-up mechanism, second unequal amplitude, planetary gear train, seedling picking experiment

Full Text:

PDF

References


Zhou M L, Shan Y Y, Xue X L, Yin D Q. Theoretical analysis and development of a mechanism with punching device for transplanting potted vegetable seedlings. Int J Agric & Biol Eng, 2020; 13(4): 85–92.

Xue X L, Li L H, Xu C L, Li E Q, Wang Y J. Optimized design and experiment of a fully automated potted cotton seedling transplanting mechanism. Int J Agric & Biol Eng, 2020; 13(4): 111–117.

Ji J T, Cheng Q, Jin X, Zhang Z H, Xie X L, Li M Y. Design and test of 2ZLX-2 transplanting machine for oil peony. Int J Agric & Biol Eng, 2020; 13(4): 61–69.

Jin X, Cheng Q, Zhao B, Ji J T, Li M Y. Design and test of 2ZYM-2 potted vegetable seedlings transplanting machine. Int J Agric & Biol Eng, 2020; 13(1): 101–110.

Zhou M L, Hua Z Y, Wang J Y, Wang L, Zhao Y, Yin D Q. New type of transverse moving box mechanism for pot seedling transplanting machine. Int J Agric & Biol Eng, 2018; 11(2): 70–75.

Choi W C, Kim D C, Ryu I H, Kim K U. Development of a seedling pick–up device for vegetable transplanters. Transactions of the ASAE, 2002; 45(1): 13–19.

Pandirwar A, Kumar A, Mani I, Bhowmik A. Development and Evaluation of Semi-Automatic Six Row Onion Seedlings Transplanter. Agricultural Mechanization in Asia, Africa & Latin America, 2019; 50(1): 29–35.

Iqbal M Z. Design of a gear driven hopper type dibbling mechanism for a 2.7 kW two-row pepper transplanter. Master dissertation, Chungnam National University, Daejeon, Korea, 2019; 64p.

Tsuga K. Development of fully automatic vegetable transplanter. Japan Agricultural Research Quarterly, 2000; 34(1): 21–28.

Shaw L N. Automatic transplanter for vegetables. Proceedings of Florida State Horticultural Society, 1997; 110: 262–263.

Shaw L N. Removing and handling modular vegetable seedlings from nursery trays. Proceedings of Florida State Horticultural Society, 1999; 112: 153–155.

Kang T G, Kim S W, Kim Y, Keun, L S, Hee J, Hyeon J. Analysis of pick-up mechanism for automatic transplanter. Journal of Agriculture & Life Science, 2017; 51(1): 187–192.

Thomas E V. Development of a mechanism for transplanting rice seedlings. Mechanism and Machine Theory, 2002, 37(4): 395–410.

Kumar G V P, Raheman H. Development of a walk-behind type hand tractor powered vegetable transplanter for paper pot seedlings. Biosystems Engineering, 2011, 110(2): 189–197.

Xin L, Lv Z J, Wang W Q, Zhou M L, Zhao Y. Optimal design and development of a double-crank potted rice seedling transplanting mechanism. Transactions of the ASABE, 2017; 60(1): 31–40.

Han L H, Mao H P, Hu J P, Tian K P. Development of a doorframe-typed swinging seedling pick-up device for automatic field transplantation. Spanish Journal of Agricultural Research, 2015; 13(2): e0210. doi: 10.5424/sjar/2015132-6992.

[17] Yu X X, Zhao Y, Chen B C, Zhou M L, Zhang H, Zhang Z C. Current situation and prospect of transplanter. Transactions of the CSAM, 2014; 45(8): 44–53. (in Chinese)

Tian K P, Mao H P, Hu J P, Han L H, Miao X H, He J Y. Design and experimental study on gate shaped seedling taking device of automatic transplanter. Agricultural Mechanization Research, 2014; 36(2): 168–172. (in Chinese)

Yin D Q, Wang J Z, Zhou M L, Yang Y C, Wang J W. Optimized design and experiment of seedling taking mechanism of bowl vegetable seedlings. Acta Agricultural Machinery, 2019; 50 (10): 64–71. (in Chinese)

Dang Y G, Jin X, Li H J, Wang J, Lu Y B, Ding B W, et al. Design of a single degree of freedom four link mechanical arm for taking and throwing seedlings. Acta Agricultural Engineering, 2019; 35 (14): 39–47. (in Chinese)

Liu Y, Mao H P, Han L H, Xu J Y, Ma G X, Li Y X. Micro CT based damage detection and parameter optimization of cucumber seedling lumps. Journal of Agricultural Engineering, 2018; 34 (12): 27–34. (in Chinese)

Yuan T, Wang D, Wen Y S, Zhu S S, Chen Y, Tan Y Z. Design and experiment of air blowing vibration compound seedling taking mechanism of vegetable transplanter. Acta Agricultural Machinery, 2019; 50(10): 80–87. (in Chinese)

Jia B Q, Ye M D, Zhai X N, Han L H, Lv J Q. Design and experiment of cam connecting rod combined seedling taking mechanism of vegetable transplanter. Agricultural Mechanization Research, 2019; 41(6): 78–82. (in Chinese)

Yu G H, Yu J P, Tong J H, Ye B L, Zheng S Y. Design of a conjugate concave convex non-circular gear mechanism. China Mechanical Engineering, 2016; 27 (16): 2155–2159, 2165. (in Chinese)

Yu Y X, Liu J K, Ye B L, Yu G H, Jin X J, Sun L, et al. Design and experimental research on seedling pick-up mechanism of planetary gear train with combined non-circular gear transmission. Chinese Journal of Mechanical Engineering, 2019; 49(32): 1–13

Ye B L, Zeng G J, Deng B, Yang C L, Liu J K, Yu G H. Design and tests of a rotary plug seedling pick-up mechanism for vegetable automatic transplanter. Int J Agric & Biol Eng, 2020; 13(3): 70–78.

Zhao X, Chen J N, Yang M X, Zhao Y. Seedling taking mechanism of two-stage free non-circular gear planetary potted seedling transplanter. Journal of Agricultural Machinery, 2014; 45(4): 123–127. (in Chinese)

Yu G H, Yu T F, Ye B L, Hu H J, Wang L W. Design of a rotary plug seedling taking mechanism. Journal of Mechanical Engineering, 2015; 51(7): 67–76. (in Chinese)

Yu G H, Yu T F, Ye B L, Jia D B, Wang L W, Hu H J. Research on a new type of planetary gear train mechanism. Journal of Mechanical Engineering, 2013; 49(15): 55–61. (in Chinese)

Zhao X, Chen J N, Wang Y, Zhao Y, Li C L. Reverse design and analysis of "D-shaped" static track transplanting mechanism for rice seedlings. Acta Agricultural Engineering, 2012; 28(8): 92–97. (in Chinese)

Wang M M, Song J N, Liu C L, Wang Y L, Sun Y P. Design and experiment of crank swing type seedling clamping mechanism of vegetable transplanter. Acta Agricultural Engineering, 2015; 31(14): 49–57. (in Chinese)

Yu G H, Tong Z P, Sun L, Tong J H, Zhao X. Novel gear transmission mechanism with twice unequal amplitude transmission ratio. Journal of Mechanical Design, 2019; 141(9): 092304. doi: 10.1115/1.4043019.




Copyright (c) 2022 International Journal of Agricultural and Biological Engineering

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

2023-2026 Copyright IJABE Editing and Publishing Office