Design, Development and Testing of Low Capital and Operational Cost Shrub Cutting Machine

Document Type: Research and Full Length Article

Authors

Mechanical Engineering Department, Maulana Azad National Institute of Technology, Bhopal- 462051,

Abstract

The machine to be designed and developed with a view to resolve one of
the irksome problems of this institute has been facing every year. This institute is
surrounded by vast non- fertile land area of about 200 acres, which becomes widely
occupied by numerous breads of bushes and shrubs during post-rainy season. Due to
this unwanted proliferation of such verdant institute gets abysmal look and that
dumps off massive fund every year to get rid off it. The shrubs cutting machines
comprises a main body (chassis) with two wheels and handle to provide movement
in the field. One power unit (small S.I. engine) is mounted on this to give power for
the cutting blades through small transmission mechanism. The cutting blades are
mounted on a small shaft. Which actually perform the cutting operation? We intend
to develop a machine which would provide better cutting action of bushes with low
capital and operational cost.
With reference to literature available there are many types of lawn mowers, bush
cutters and lawn tractors are exist in the market, which may not fulfill the capital and
operational cost criteria. The main concentration of our design is the cost and
operational ease. During design, development and fabrication the machine was
undergone several laboratory. Field tests like; determination of torque and force
analysis, load and speed test on design specifications (for shaft, gear and bearings),
impact test, balance test and finally cutting output test. After testing we succeed to
have a satisfactory performance, though it requires further more improvements
which can be done in due course of time in stage II of the project.

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