Study on the Design of Composite Transmission System for Crawler Type Full-Feeding Combine Harvester

Lou, Xi Yin

doi:10.4028/www.scientific.net/amm.722.80

Cited by 3 publications

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“…Developed according to the biological and physical characteristics of cassava, it can simultaneously perform excavation, transportation, and separation of tubers, and the digging shovel, gripper, and separator are important components of the cassava harvester [21]. In the early 21st century, Isaac N Itodo et al [22,23] evaluated the performance of a yam harvester mounted on a tractor. The effects of cutting depth, lifting angle, and forward speed on the number of tubers lifted, the number of exposed yams, the number of damaged yams, and the number of yams delivered to the collection unit were investigated using ANOVA to evaluate the harvester.…”

Section: Exotic Yam Harvesting Techniques and Status Of Researchmentioning

confidence: 99%

Agronomic Techniques and Mechanized Harvesting Techniques for Yams Status and Countermeasures

Cai

2023

AJRCS

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Yams are increasingly recognized for their good health benefits as people increasingly focus on healthy eating and wholesome eating. However, the high cost of yam cultivation and harvesting, as well as the limited level of mechanization, severely restricted the development of the industry. For this deep rhizomatous, brittle, and breakable yam crop, mechanized harvesting is prone to breakage, skin breakage, and low damage rates to the intact crop. In this paper, we have analyzed the characteristics of yam, the current situation of the yam economy in China, the development of mechanized techniques for yam harvesting at home and abroad, and the constraints. In addition, the development of casing yam cultivation techniques and mechanization of harvest is also promising. It mainly introduced plowshare furrow openers, disc furrow openers, spiral furrow openers and chain furrow openers, double-row chain yam planting and harvesting machines, spiral yam harvesting and planting machines, fully hydraulically suspended single-row yam harvesters and vibrating yam harvesters.

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Section: Exotic Yam Harvesting Techniques and Status Of Researchmentioning

confidence: 99%

Agronomic Techniques and Mechanized Harvesting Techniques for Yams Status and Countermeasures

Cai

2023

AJRCS

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Development of an Attitude Adjustment Crawler Chassis for Combine Harvester and Experiment of Adaptive Leveling System

Pan

Dai

et al. 2022

Agronomy

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Body tilt is typically unavoidable for agricultural vehicles or platforms when operated over tough terrain in agricultural production, and, therefore, it is not possible to guarantee the operation performance. Current leveling methods mainly focus on wheeled vehicles or adjustment for single working parts rather than the vehicle body, and few of them could be applied to crawler vehicles. The objective of this research was to put forward an adaptive leveling system for combine harvesters based on the development of a new four-point lifting adjustable crawler chassis. The working principle of the proposed adjustable mechanism was studied on the basis of the analysis of adjustment characteristics under multiple posture adjustment conditions in a RecurDyn environment. The design relies on the combination of the attitude detection of the leveling system and adjustment calculation of driving hydraulic cylinders according to the established mathematical models. Within the designed adjustable extent (including adjustment range of vehicle height 0–87.8 mm, lateral inclination ±3.98° and longitudinal inclination −2.9–5.2°), the leveling performance of lateral and longitudinal inclination was then tested separately. The experiment showed that the leveling system could achieve automatic leveling with an accuracy of ±0.4° and could provide technical support for the development of crawler vehicles.

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Design and Experiment of Finger-Chain Grain Lifter for Ratoon Rice Stubble Rolled by Mechanical Harvesting

CHEN¹,

LIANG²,

LIU³

et al. 2022

INMATEH

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For rice ratooning, the lateral bud germination of the rice stubble after the first harvesting can be used to continue the next growing season, but the first harvesting machinery will crush and damage the rice stubble, resulting in the reduction of yield in the ratooning season. Lifting the rolled stubble can reduce this loss, and thus a double-chain finger grain lifter was designed in this study. Then, a kinematic model and motion trajectory curve of the grain lifter was established. The influence law of the chain speed, chain spacing and the number of fingers of the rear lifting chain was determined. Furthermore, taking into account the success rate and the rate of secondary damage of the lifting, a full-factor bench test was performed. The best operating characteristics of the grain lifter are: chain speed of 345 r/min, adjacent chain spacing of 300 mm, and the number of gears and fingers on the rear lifting chain of 3. The success rate and the secondary damage rate of the lifting is 90.05% and 1.72%, respectively. A field verification test was conducted, with an average success rate of 55%. The results of this study can provide valuable reference for the lifting technology of rolled rice stubble and promote the whole mechanized production of ratoon rice.

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Study on the Design of Composite Transmission System for Crawler Type Full-Feeding Combine Harvester

Cited by 3 publications

References 0 publications

Agronomic Techniques and Mechanized Harvesting Techniques for Yams Status and Countermeasures

Agronomic Techniques and Mechanized Harvesting Techniques for Yams Status and Countermeasures

Development of an Attitude Adjustment Crawler Chassis for Combine Harvester and Experiment of Adaptive Leveling System

Design and Experiment of Finger-Chain Grain Lifter for Ratoon Rice Stubble Rolled by Mechanical Harvesting

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