Design and experiment of double planet carrier planetary gear flower transplanting mechanism
Keywords:
flower transplanting, double planet carrier planetary gear mechanism, non-circular, plug seedlingAbstract
At present, there is a lack of miniaturized and highly reliable plug seedling transplanting mechanism in flowerpots planting operation, in order to meet the needs of large displacement and high vertical uprightness for flower transplanting, the paper combined the transmission characteristics of the non-circular gear planetary gear train with the swing flexibility of the cam gear and proposed a double planet carrier planetary gear transplanting mechanism. The linkage of the mechanism performs variable speed rotation relative to the first planet carrier, the linkage serves as the second planet carrier, and the transplanting arm performs variable speed swing relative to the linkage. A mathematical model of a single planetary carrier mechanism was first established using the method of open linkage group solution domain synthesis, then established the kinematic equations of the second planet carrier and the transplanting arm. The two parts are combined to form the mathematical solution model of the proposed mechanism. The initial trajectory was planned according to the trajectory requirements of seedlings planting operation, the non-circular gear pitch curve in the first planet carrier was obtained and the length of the first planet carrier is 120 mm. Then using the key points’ angular deviation between the initial trajectory and the improved trajectory to obtain the cam parameters which driving the transplant arm, consequently determined the length of the second planet carrier is 69.25 mm and the length of the transplant arm is 112.4 mm. Finally, the prototype of the mechanism was manufactured, and the test verified the correctness of the design method of the double planet carrier planetary gear flower potting transplanting mechanism. The transplanting success rate of this mechanism reached 94.43%, and the plug seedlings planted in flowerpots had high uprightness. This research can provide a reference for the automatic development of research on flower transplanting machines. Keywords: flower transplanting, double planet carrier planetary gear mechanism, non-circular, plug seedling DOI: 10.25165/j.ijabe.20211402.5878 Citation: Zhao X, Liao H W, Ma X X, Dai L, Yu G H, Chen J N. Design and experiment of double planet carrier planetary gear flower transplanting mechanism. Int J Agric & Biol Eng, 2021; 14(2): 55–61.References
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[2] Feng Q C, Wang X, Jiang K, Zhou J J, Zhang R, Ma W. Design and test of key parts on automatic transplanter for flower seedling. Transactions of the CSAE, 2013; 29(6): 21–27. (in Chinese)
[3] Hao C Y, Wang L J. Based on PLC flower bowl seedlings transplanting machine automatic transmission device. Journal of Agricultural Mechanization Research. 2018; 40(6): 220–223. (in Chinese)
[4] Zhao X, Zhang X S, Wu Q P, Dai L, Chen J N. Research and experiment of a novel flower transplanting device using hybrid-driven mechanism. Int J Agric & Biol Eng, 2020; 13(2): 92–100.
[5] Ting K C, Giacomell G A, Shen S J, Kabala W P. Robot workcell for transplanting of seedlings part II end-effector development. Transactions of the ASABE, 1990; 33(3): 1013–1018.
[6] Dang Y G, Jin X, Li H J, Wang J, Lu Y B, Ding B W, et al. Design of single-degree-of-freedom four-bar seedling-taking and throwing manipulator. Transactions of the CSAE, 2019; 35(14): 39–47. (in Chinese)
[7] Choi W C, Kim D C, Ryu I H. Development of a seedling pick-up device for vegetable transplanters. Transactions of the ASAE, 2002; 45(l): 13–19.
[8] Xin L, Lyu Z J, Wang W Q. Optimal design and development of a double-crank potted rice seedling transplanting mechanism. Transactions of the ASAE, 2017; 60(1): 31–40.
[9] Zhou M F, Xu J J, Tong J H, Y G H, Zhao X, Xie J. Design and experiment of integrated automatic transplanting mechanism for taking and planting of flower plug seedlings. Transactions of the CSAE, 2018; 34(20): 44–51. (in Chinese)
[10] Ye B L, Li L, Yu G H, Liu A, Zhao Y. Dynamics analysis and test of rotary pick-up mechanism for vegetable pot-seedling. Transactions of the CSAM, 2014; 45(6): 70–78. (in Chinese)
[11] Yu G H, Jin Y, Chang S S, Ye B L, Gu J B, Zhao X. Design and test of clipping-plug type transplanting mechanism of rice plug-seedling. Transactions of the CSAM, 2019; 50(7): 100–108. (in Chinese)
[12] Yu G H, Liao Z P, Xu L H, Zhao P, Wu C Y. Optimization design and test of large spacing planetary gear train for vegetable pot-seedling planting mechanism. Transactions of the CSAM, 2015; 46(7): 38–44. (in Chinese)
[13] Sun L, Xu Y D, Huang H M, Wang Z F, Zhang G F, Wu C Y. Solution and analysis of transplanting mechanism with planetary gear train based on convexity of pitch curve. Transactions of the CSAM, 2018; 49(12): 83–92. (in Chinese)
[14] Xue X L, Wang L, Xu C L, Zhou M L, Zhao Y. Optimal design and experiment of longitudinal feeding-seedling device of potted seedling transplanter for upland field. Transactions of the CSAM, 2020; 51(2): 76–84. (in Chinese)
[15] Zhao X, Li K W, Cui H Y, Chen J N, Ye B L, Dai L. Design method and applied research of a planetary gear system mechanism based on solution region synthesis. International Agricultural Engineering Journal, 2019; 28(2): 100–109.
[16] Zhao X, Ye J, Chu M Y, Dai L, Chen J N. Automatic scallion seedling feeding mechanism with an asymmetrical high-order transmission gear train. Chinese Journal of Mechanical Engineering, 2020; 33: 10. doi: 10.1186/s10033-020-0432-9.
[17] Zhao Y, Zhang W X, Xin L, Xie J T, Xue X L, Shan Y Y. Design and experiment of extensible potted tomatoes seedling transplanting mechanism. Transactions of the CSAM, 2019; 50(1): 112–119. (in Chinese)
[18] Sun L, Shen J H, Zhou Y Z, Ye Z Z, Yu G H, Wu C Y. Design of non-circular gear linkage combination driving type vegetable pot seedling transplanting mechanism. Transactions of the CSAE, 2019; 35(10): 26–33. (in Chinese)
[19] Choi W C, Kim D C, Ryu I H, et al. Development of seedling pick-up device for vegetable transplants. Transactions of the ASAE, 2002; 45(1): 13-19.
[20] Yang T, Han J Y. Solution region synthesis method of planar one-DoF six-bar linkages for specifying 4-positions of a 3R open chain. Journal of Mechanical Science & Technology, 2016; 30(7): 3069-3077.
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Published
2021-04-03
How to Cite
Zhao, X., Liao, H., Ma, X., Dai, L., Yu, G., & Chen, J. (2021). Design and experiment of double planet carrier planetary gear flower transplanting mechanism. International Journal of Agricultural and Biological Engineering, 14(2), 55–61. Retrieved from https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/5878
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Power and Machinery Systems
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