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Modification and Performance Evaluation of a Mango Harvester (2016 – 2017)

N. Jahan
Farm Machinery & Postharvest Process Engineering Division, BARI, Joydebpur, Gazipur Bangladesh

M N Amin
Farm Machinery & Postharvest Process Engineering Division, BARI, Joydebpur, Gazipur Bangladesh

M A Hossain
Farm Machinery & Postharvest Process Engineering Division, BARI, Joydebpur, Gazipur Bangladesh

M A Haque
Farm Machinery & Postharvest Process Engineering Division, BARI, Joydebpur, Gazipur Bangladesh

Abstract/ Executive Summary:

Mango harvester is mainly used for harvesting mango fruits with less drudgery, fatigue on labour, also preventing damage to the tree branches & fruits as compared to manual plucking and tree shaking. A mango harvester was designed and fabricated at Farm Machinery & Postharvest Process Engineering Division, BARI, Gazipur during 2014-15. The weight of aluminium mango harvester reduced from 4 to 2 kg and final weight of the harvester 1.7 kg. The mango was harvested from different height trees in different location of BARI campus, Gazipur during 2016-2017. The highest capacity of modified aluminium and modified bamboo harvester was found to be 222 kg/h and 156 kg/h. When mangoes were harvested by aluminium harvester, 4% of mangoes were found with pedicel length below 1-1.5 cm, whereas it was 5% for the modified bamboo harvester. The overall efficiency of the aluminium and modified bamboo harvester was found to be 95%. The initial cost of the aluminium harvester was Tk. 5800 and it reduced to Tk. 2200 during 2015-16. The initial cost of the modified bamboo harvester was Tk.1100 and previous model bamboo harvester was Tk.450. The payback period of both types of the harvester was 3 days and 2 days respectively during 2016-17. During this year cutting blade of the harvester was set at the upper side of the ring which facilitates the operator to observe the position of mango during cutting operation that makes harvesting operation easy for the operator.

Keywords: Economic, Mango harvester, Modification

Location: Farm Machinery and Postharvest Process Engineering Division of Bangladesh Agricultural Research Institute (BARI), Joydebpur, Gazipur

Start Date: 00-00-2016

End Date: 00-00-2017

Program Area: Postharvest and Agro-processing

Commodity: Mango, Harvester

Objectives:

(a) To modify the existing mango harvester for easy harvesting of mango

(b)To evaluate the performance of the harvester

Methodology:

The mango harvester was designed and fabricated at the workshop of the Farm Machinery and Postharvest Process Engineering Division of Bangladesh Agricultural Research Institute (BARI), Joydebpur, Gazipur during 2014-2015. During 2015-16 and 2016-17 gradually improvement has done. It was made of locally available materials. The materials used for the fabrication of different parts of the harvester were high carbon steel, MS flat bar, MS rod, MS sheet, nut-bolt, clutch cable, clutch lever, aluminum pipe and other small items. Construction materials and a major component of various mango harvester with specifications. Modified aluminum and bamboo harvester were designed using solid work and AutoCAD software. 2D Drawing of modified mango harvester during 2015-16 and 3D drawing of modified mango harvester during 2016-17. This manual mango harvester has an oval-shaped ring that is 200 mm in diameter. The ring has worn rubber to minimize the hardness of the ring which sometimes causes injuries to mango. A nylon net was attached to the ring to hold the mangoes when they are cut by the knife. There is an angle adjuster that is connected to the ring and aluminum pipe by a clamp, made of MS sheet. The height of the mango harvester can be maintained up to 4165 mm by inserting 25 mm diameter pipe into 30 mm diameter pipe. A cutting mechanism is provided at one end of the ring. The cutting blade is divided into two parts which are held together by a nut bolt and attached to the knife arm, tension spring and clutch cable. For harvesting mango, the harvester is raised and pedicels of the fruit are taken in between the sharp edge of the blade where it is serrated. When the cable lever is pressed the cutter will cut the fruit from its node by applying the lever push action through the clutch cable. It can cut mango pedicel at a desire point without pulling action by using a clutch lever and wire. When the mango tree is taller, the mango can be picked up sitting on a suitable place of the tree using the harvester. In this situation, it is easy for the operator to pick up mango keeping angle adjuster 0 degrees with respect to bamboo or aluminum handle. When the mango tree is shorter, mango can be easily picked up from the ground using this harvester and the angle of the harvester should be kept 45-60 degrees with respect to bamboo or aluminium handle. Firstly, mango is to be kept at the middle of the harvester and to hold at the lower part of the harvester. Keeping pedicel length 10-15 mm at the middle of the two blades which are connected to the ring, the lever is pressed and cut at the desired point without pulling action by using clutch lever and wire. When mango is picked up from a taller tree the height of the mango harvester can be maintained up to 4165 mm using aluminium handle. The pedicel is cut and mangoes will fall in the net with the pedicel. After harvesting several mangoes, these will be kept in a suitable place.

Source of Information: Annual Research Report 2016 – 2017, Farm Machinery & Postharvest Process Engineering Division, BARI, Joydebpur, Gazipur Bangladesh

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The highest capacity of modified aluminium and modified bamboo harvester was found to be 222 kg/h and 156 kg/h when number of the mangoes per kg was 2.When mangoes were harvested by aluminium harvester, 96% of mangoes were found with pedicel length above1-1.5 cm whereas it was 95% for modified bamboo harvester that can be reduced significant amount of postharvest loss during harvesting.The price of aluminium and modified bamboo harvester was Tk. 2200 and Tk. 1100.The payback period of both types of harvester was 3 days and 2 days respectively during 2016-17.

Knowledge Management: Report/Proceedings