| Project/Area Number |
63560235
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
農業機械
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| Research Institution | IWATE UNIVERSITY |
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Principal Investigator |
BANNO Tatsuya IWATE UNIVERSITY DEPT.of AGR., PROFESSOR, 農学部, 教授 (90003730)
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| Co-Investigator(Kenkyū-buntansha) |
TAKEDA Junichi IWATE UNIVERSITY DEPT.of AGR., Assitt.PROFESSOR, 農学部, 助手 (80133908)
TORISU Ryo IWATE UNIVERSITY DEPT.of AGR., Assoc.PROFESSOR, 農学部, 助教授 (70038264)
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| Project Period (FY) |
1988 – 1989
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| Project Status |
Completed (Fiscal Year 1989)
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| Budget Amount *help |
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1989: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1988: ¥1,500,000 (Direct Cost: ¥1,500,000)
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| Keywords | four-bar linkage / pendulous hoe / vibrating machine / soil penetration / burying property of soil / tillage methods / soil pulverization / mechanical manipulation of soil / 反転性 / 耕うんトルク / 振動 / 深耕 |
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| Research Abstract |
The authors described the synthesis of four-bar linkage system to generate a desired function for new tillage machine, CRANK HOE that is a kind of pendulous hoe. Mathematical simulation of motion of four-bar linkage and field test were carried out with four combinations of coupler-lever lengths respectively.
The shape of the soil slices cut off by the pendulous hoe, depends on the mutual ratio of the length of the links constituting the driving mechanism. Small soil slices can be obtained at high frequency of oscillations. Big soil slices and deep penetration can be obtained at low frequency and B or C type of blade curve. Especially, blade tips attached to the edge has effective turning property of throwing big soil slices in the paddy field. The soil moisture content affects the burying property of hoe and four kinds of hoe tested have no significant differences in dry condition field.
Power spectral analysis technique is used to analyze the time varying nature of a vibrating tillage implement, CRANK HOE during tillage operations. The vibrations generated by the four-bar-linkage occurs at high frequency in which the distributed parts of the implement are excited. The vibrations caused by the interactions between the blades and soils rises in the low frequency ranges that the tractor-implement system oscillates as a mass-spring system.
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