Study on Vegetable Plug Seedling Pick-up Mechanism of Planetary Gear Train with Ellipse Gears and Incomplete Non-circular Gear

Ye, Bingliang; Chen, Zhiwei; Yu, Guo; 赵匀,; Sun, Liang; 孙良,; Zhao, Yun; 陈志威,; 叶秉良,; 俞高红,

doi:10.3901/jme.2012.13.032

Cited by 20 publications

(18 citation statements)

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“…À t shown in Figure 4 using the function polyder( ) of Matlab. 22 Curve a x in strategy (3) is entirely consistent with that in strategy (4). For the two strategies, curves a t are both 0.…”

Section: Kinetic Analysis Of Gear Shapingsupporting

confidence: 50%

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Study of optimal strategy and linkage-model for external non-circular helical gears shaping

Liu

2014

Proceedings of the Institution of Mechanical Engineers, Part C:

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As an efficient manufacturing method for gears, shaping technology developed for non-circular helical gears will greatly break through the dilemma of their applications; especially for those gears with part of pitch curves being concave, being not able to be hobbed. Two fundamental linkage-models for external non-circular helical gears were built based on the meshing theory of non-circular gears in this article. According to four linkage methods in plane and two kinds of additional rotation in vertical direction, eight shaping strategies and their practical linkage-models (1)-(8) were developed. Taking a three-order elliptic helical gear as an example, the kinematic characteristics of the eight practical linkagemodels were analyzed, which reveals that equal arc-length of gear billet (models (3) and (4)) have the highest accuracy under a given efficiency. The dynamic characteristics of models (3) and (4) were analyzed, which shows that model (4) (equal arc-length of gear billet and additional rotation on shaper cutter) is better in performance, and is an optimal one. The optimal linkage-model was demonstrated to be valid by a virtual shaping, and be able to shape those non-circular helical gears with part of pitch curves being concave. Moreover, the accuracy among every gear tooth is uniform. The theory developed and the results of the virtual shaping were illustrated with a shaping experiment. The train of thought and the results will be useful for any external non-circular helical gears with free pitch curves.

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Section: Kinetic Analysis Of Gear Shapingsupporting

confidence: 50%

“…Ã c in strategy (3) and the curve ! c in strategy (4). That is to say, there is a great difference in kinetic performances between the two strategies.…”

Section: Kinetic Analysis Of Gear Shapingmentioning

confidence: 88%

Study of optimal strategy and linkage-model for external non-circular helical gears shaping

Liu

2014

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…According to the testing results in this study, seedling removal with a four-pin gripper should be accomplished as simply as possible to reduce the transplanting cost. Compared with other studies (Yang et al, 1991;Ryu et al, 2001;Choi et al, 2002;Yu et al, 2013;Ye et al, 2013), it was further proved that acting on the root mass with four fine pick-up pins could facilitate the seedling extraction better.…”

mentioning

confidence: 72%

“…Yu et al (2011) designed a rotary transplanting mechanism with planetary elliptic gears. Based on Visual Basic 6.0 and a parameter-guided optimization method, Yu et al (2013) developed the software of aided analysis and parameter optimization for a rotary transplanting mechanism. A set of parameters were computed and optimized, which met the work trajectory requirements of pick-up mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Development of a doorframe-typed swinging seedling pick-up device for automatic field transplantation

Han

Mao

et al. 2015

Span. j. agric. res.

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<p>A doorframe-typed swing seedling pick-up device for automatic field transplanters was developed and evaluated in a laboratory. The device, consisting of a path manipulator and two grippers, can move the pins slowly to extract seedlings from the tray cells and return quickly to the pick-up point for the next extraction. The path manipulator was constructed with the creative design of type-Ⅱ mechanism combination in series. It consists of an oscillating guide linkage mechanism and a grooved globoidal cam mechanism. The gripper is a pincette-type mechanism using the pick-up pins to penetrate into the root mass for seedling extraction. The dynamic analysis of the designed seedling pick-up device was simulated with ADAMS software. Being the first prototype, various performance tests under local production conditions were conducted to find out the optimal machine operation parameters and transplant production conditions. As the gripper with multiple fine pins was moved by the swing pick-up device, it can effectively complete the transplanting work cycle of extracting, transferring, and discharging a seedling. The laboratory evaluation showed that the pick-up device equipped with two grippers can extract 80 seedlings/min with a 90% success and a 3% failure in discharging seedlings, using 42-day-old tomato plantlets. The quality of extracting seedlings was satisfactory.</p>

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“…Then the software is applied to analyze the influences of the design variable on the optimization objectives. Finally, the human-computer interaction mode is adopted to realize parameter optimization of the mechanism by means of the experts' experience and analyze the optimization results [11,[20][21][22][23] .…”

Section: Speed Model Of the Transplanting Mechanismmentioning

confidence: 99%

Optimization design and test of rice plug seedling transplanting mechanism of planetary gear train with incomplete eccentric circular gear and non-circular gears

Ye¹,

Yi²,

Yu³

et al. 2017

International Journal of Agricultural and Biological Engineering

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In order to solve the problem of the high-speed mechanized transplanting of rice plug seedlings, the design requirements of transplanting mechanism for rice plug seedlings were analyzed and a kind of rice plug seedling transplanting mechanism of planetary gear train based on the drive with incomplete eccentric circular gear and non-circular gears was designed innovatively. The laboratory kinematics was examined. The working principle of the transplanting mechanism for rice plug seedlings was studied, kinematics analysis of the transplanting mechanism was carried out and its kinematic model was set up. A human-computer interaction optimization method was used to optimize the parameters of the transplanting mechanism. The computer aided analysis and optimization software of the transplanting mechanism based on Visual Basic 6.0 was developed. Through analyzing the influence of design variables on the optimization objectives of the transplanting mechanism, a set of parameters of the transplanting mechanism which meet the requirements of transplanting trajectory and posture for transplanting rice seedlings were obtained by means of human-computer interaction. The structure of the transplanting mechanism was designed according to this set of parameters, and its virtual prototype and physical prototype were set up and manufactured, respectively. The kinematic simulation test and high-speed photography kinematic test of the transplanting mechanism were conducted to obtain its kinematic performances, such as transplanting trajectory and posture.The results of bench test, simulation analysis and theoretical analysis were almost in agreement, which verified the correctness of the theoretical model and design results of the transplanting mechanism, indicating that the optimized transplanting mechanism can satisfy the requirements of transplanting rice seedlings and be applied in the rice plug seedling transplanter. Citation: Ye B L, Yi W M, Yu G H, Gao Y, Zhao X. Optimization design and test of rice plug seedling transplanting mechanism of planetary gear train with incomplete eccentric circular gear and non-circular gears. Int J Agric & Biol Eng, 2017; 10(6): 43-55.

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Study on Vegetable Plug Seedling Pick-up Mechanism of Planetary Gear Train with Ellipse Gears and Incomplete Non-circular Gear

Cited by 20 publications

References 0 publications

Study of optimal strategy and linkage-model for external non-circular helical gears shaping

Study of optimal strategy and linkage-model for external non-circular helical gears shaping

Development of a doorframe-typed swinging seedling pick-up device for automatic field transplantation

Optimization design and test of rice plug seedling transplanting mechanism of planetary gear train with incomplete eccentric circular gear and non-circular gears

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