International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 12 Issue: 08 | Aug 2025
p-ISSN: 2395-0072
www.irjet.net
Theoretical Design and Modification of Manually Operated Solar Grass Cutting Machine Achyut Ghosh1, Md. Asraf Ansari2, Ashish Kumar 3, Md. Asdul4, Md. Fazal5 6B. G. Shukla 1Student of Oriental Institute of Science and Technology, Bhopal 2Student of Oriental Institute of Science and Technology, Bhopal 3Student of Oriental Institute of Science and Technology, Bhopal 4Student of Oriental Institute of Science and Technology, Bhopal 5Student of Oriental Institute of Science and Technology, Bhopal 6Assistant Professor, Dept. of Mechanical Engineering, Oriental Institute of Science and Technology, Bhopal,
Madhya Pradesh, India --------------------------------------------------------------------------***---------------------------------------------------------------------------Abstract In our work we designed and fabricated a solar energy based grass cutting machine which is low cost ,high efficient and more flexi ble machine. Here, with improved cut grass separation mechanism and improved blade profile the speed of cutting and power inp ut has been considerably improved. The initial cost of fabrication has been slightly increased which is negotiable due to its improv ed efficiency. The cutting mass outcome from exit is 143 kg/minute with height of cutter 8 cm from ground level of grass. The rate of cut out of grass theoretically is about 21% more than the cutter used as lawn grass cutter using petrol as fuel having same watt age input as in our work has been used. Key words: Archemedian spiral, involute profile, deflector, reducing gear drive, 90o crank mechanism.
1. INTRODUCTION There had always been many scopes to improve the input , output, production rate, service, maintenance, manufacturing cost, f lexibility of any product or service given to any customer. In reference to our work many researchers tried to improve the gras s cutting machine [1-4] . There are electrical energy based, petrol, diesel or LPG based grass cutting machines used by farmers and industrialists for so many reasons of their suitability of uses. But, to improve the efficiency of cutting, reducing maintenanc e and increasing the flexibility we designed and fabricated the required machine for lawn removing and related forming purpo ses[1-5]. In our wok, we fabricated a casing of grass cutting machine in shape of Archemedian spiral where rate of separation of cut ma ss of grass is function of rate of change of radius of curvature of spiral, thus increasing the separation outbox just one side of fo rm or lawn or it can be collected on box attached to the machine. With the improved cutter profile of involute shape of cutter a ttached with separator part of rectangular hyperbolic shape type along with cutter increases cutting mass per unit time in con nection with increased scavenging effect due to separator’s centrifugal force. There are two actuators attached with one right c rank angle known as lifter and pusher (by elliptical trammel mechanism connected with motor shaft) also helps separation rat e which is required objective of our work as the cutting the grass mass is higher due to improved blade profile, i.e., the shape a nd size of blade mechanism. thus, solar powered grass cutting machine is advanced machine working on solar energy based re sulting more efficient and green designed device. The rack and pinion mechanism is used to adjust height of cutter blade above the grass uproot. The actuator i.e. lifter , the first reciprocating pump pushes up the cut mass of grass at 50o- 60o from horizon tal and further the cut grass mass is pushed down to box exit or store box situated at 45 o-50o vertically downward at about ear th level. The involute passage provide easy scavenging of cut grass mass. The labor charge of collection of waste cut of grass is therefore reduces due to one point and one side separation of waste along-with scattering of mass over the area of field of gras s is reduced.
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