All Issue

2018 Vol.43, Issue 4 Preview Page
December 2018. pp. 285-295
Abstract

Purpose: The aim of this study is to develop a three-wheel riding cultivator for improving the performance of the current four-wheel riding cultivators in the market. Methods: A prototype three-wheel riding cultivator with the rated power of 15.5-kW, a primary hydrostatic and a two-speed selective gear transmission shifts, front/rear three-wheel drive, a hydraulic wheel tread adjustment, and the mid-section attachment of the major implements was designed and constructed. Its specifications and basic performance are investigated. Results: The maximum speeds of the prototype at the low and high stages were measured to be approximately 7.31, and 11.29 km/h in forward travel, respectively, and approximately 3.60, and 6.37 km/h in rearward travel, respectively. The minimum ground clearance is shown to be 670 mm. The rotating speeds of the power takeoff (PTO) shaft at the low and high stages are shown to be approximately 795 and 1,140 rpm, respectively. The tread of the rear wheels, the minimum radius of turning, and the maximum lifting height of the parallel link device are measured to be within 1,320–1,720 mm, 2.80 m, and 390 mm, respectively. Approximately 25.3% and 74.7% of the total weight of the prototype are distributed in the front and rear wheels on flat ground, respectively. When the tread of rear wheels increased from 1,320 to 1,720 mm, the left and right static lateral overturning angles increased from 33.4° to 39.1° and from 29.0° to 36.1°, respectively. Conclusions: The prototype three-wheel riding cultivator showed a wide range of travel and PTO speeds, high minimum ground clearance, small minimum radius of turning, and easy control of the rear wheel tread. Further, the easy observation of cultivating operations by mid-mounting the implements can improve quality of work. Therefore, the prototype is expected to contribute to the riding mechanization of cultivating operations for various upland crops in Korea.

References
  1. Choi, I. S., S. N. Yoo and B. S. Lee. 2016. Development of a 3-wheeled riding-type cultivator & attaching implements for upland crops. 2016 Research report for cooperative research program for agricultural science & technology development. Project No. PJ011807. Jeonju, Jeonbuk, Korea: The Rural Development Administration. (In Korean)
  2. Choi, I. S., S. N. Yoo and B. S. Lee. 2017. Development of a 3-wheeled riding-type cultivator & attaching implements for upland crops. 2017 Research report for cooperative research program for agricultural science & technology development. Project No. PJ011807. Jeonju, Jeonbuk, Korea: The Rural Development Administration. (In Korean)
  3. FACT. 2016. Agricultural machinery testing methods – cultivating vehicle: 209-215. Suwon, Korea The Foundation of Agriculture Techniques Commercialization and Transfer. (In Korean)
  4. FACT. 2018. Testing results for 4-wheel riding type cultivating vehicles. The Foundation of Agriculture Techniques Commercialization and Transfer. (In Korean)
  5. Han, B. H., I. S. Choi, Y. Choi, Y. T. Yun and S. N. Yoo. 2016. Design and construction of a 3-wheel riding type cultivating vehicle. In Proceedings of the KSAM & KSPA 2016 Autumn Conference, pp. 86, Chunan, Chungnam, Korea: November 2016. (In Korean)
  6. Minoru. 2005. Manual for Minoru 3-wheel cultivating vehicle RTX30: 1-47. Okayama, Japan: Minoru Industry Co., Ltd. (In Japanese)
  7. NIAS. 2016. Survey on utilization of agricultural machinery in 2015: ii, iv-v, 66. Jeonju, Jeonbuk, Korea: The National Institute of Agricultural Sciences in The Rural Development Administration. (In Korean)
  8. Yanmar. 2017. Catalog for 3-wheel cultivating vehicle MD20: 1. Osaka, Japan: Yanmar Co. Ltd. (In Japanese)
Information
  • Publisher :The Korean Society for Agricultural Machinery
  • Publisher(Ko) :한국농업기계학회
  • Journal Title :Journal of Biosystems Engineering
  • Journal Title(Ko) :바이오시스템공학
  • Volume : 43
  • No :4
  • Pages :285-295
  • Received Date :2018. 09. 19
  • Accepted Date : 2018. 11. 23