One end of this output shaft is connected to Crank and slotted lever Mechanism which converts rotary motion of shaft into reciprocating motion of cutter blade. Reciprocating cutter blade slides over fixed blade and creates scissoring action responsible for cutting the crop and other end is connected to the collecting mechanism. The required frame must be in light weight and able to sustain weight of petrol engine.
For fabrication purpose the mild steel angle section is use to built the frame. And it is kick start type engine. Petrol engine is used because of it has good efficiency and easily available in rural areas. Specifications- Displacement Cutter assembly consists of a sliding and stationary cutter plate.
In this project the idea is to make the mechanization of small scale crop cutting machine. The machine focuses to combination of cutting and collecting the crop for small scale farmers. Different parts of a machine will be mounted on strong chassis. The wheel will be attached to this chassis. The petrol engine is mounted on the chassis which provides the power to the wheels to move by chain drive and gear. It is required to transmit a power to two mechanisms that is four bar mechanism and collecting mechanism.
To divert the motion by 90 degree this type of gear box is used. Collecting mechanism consists of motorcycle chain on which metal strips are welded for collecting crop. Chain sprocket used to carry chain. When cutting action takes place simultaneously collecting mechanism collects the crops.
The slotted lever mechanism is used to convert the linear motion of a slider into rotational motion or vice-versa. This mechanism is generally found on shaping machines where single point cutting tool is mounted on the front of the slider or ram, in a hinged tool post. A cost estimate is the approximation of the cost of a program, project, or operation. The cost estimate is the product of the cost estimating process. The cost estimate has a single total value and may have identifiable component values.
A cost estimator is the professional who prepares cost estimates. The time required to convert the raw material into the finished products is called as machining time. The machining time is to be calculated for each part. The machining time can be calculated by following formulae. Reduce the human effort- Crop harvester is mostly design for reduce the human effort in which only one operator can be operate or handle the machine.
While the machine will begin there not required more than one or two worker. Reduce the cost- In the agriculture for cropping the Wheat, Javar and Tuvar. It can cut at cheapest prices because it saves the worker cost. Reduce the time- When worker is cutting the crop they have more time for cutting but when the use of the crop cutter harvester they increase the capacity of the working and cutting and it can possible the maximum cutting within minimum time.
Adjustable Cutting mechanism- The Cutting mechanism of this machine is adjustable. We can remove this mechanism very easily so it can be change, repair and replace with other mechanism also. Hence in above comparison it is clear that the cost of working by machine in the farm for said application is less as compared to labour cost.
David Hamilton Cockburn, ver. Caldwell, Oxford; Nigel W. Nag, P. Ergonomics in sickle operation. Applied Ergonomics,. Nalawade, S. Design and development of tractor operated Jowar reaper windrower. A loop-handle design helps maintain a secure and controlled grip for each snip. For proper wrist alignment and reduced strain, these swivel-blade grass shears from Q-yard help gardeners clip grass at ergonomically correct angles.
Suitable for trimming grass along the edges of flowerbeds and driveways, or topping areas of the lawn, these professional-grade shears offer a lightweight and comfortable option. Made of carbon steel with a nonstick coated blade, these shears also have a micro-serrated edge, helping to grip while cutting even as the blade dulls from use.
Cutting requires less effort as these shears use compound lever technology, offering up to twice the cutting power over other shears. Coming in around 8 ounces, these blades are lightweight for easy handling and cutting. When not in operation, safety locks keep the grass shears closed. Some grasses are tougher than others, requiring stronger shears.
For stubborn grasses, leaves, and stems, use these swivel-blade shears from Kings County Tools. The blades rotate either 45 or 90 degrees, giving more options for trimming than a fixed blade but less flexibility than shears with degree rotation. What it lacks in angles, however, it makes up for in strength.
The power spring helps make cutting down unruly stems a more efficient process, reducing trimming time. By sharpening the 5. Hold the handle by the comfort grip for edging, topping, or small pruning jobs. These long-handle shears from Fiskars are kind to backs and knees, enabling users to stand instead of crouch, bend, or kneel when trimming the grass.
The inch aluminum shaft gives users easy access to overgrown areas, eliminating the aches and pains that may come with bending and kneeling. A swivel-blade head moves degrees for trimming at the best angle for the job. With its 4. Unlike some models, this blade cuts clean to the tip, reducing the need to clip the same area repeatedly.
An ergonomically designed handle with a comfortable grip makes it easy to hold the 2-pound shears. To help, here are some commonly asked questions and answers about grass shears. Lawn shears are meant to clip blades of grass or weeds that pop up in the middle of the lawn, as the blades on lawn shears are horizontal. With vertical, scissor-like blades, edging shears clean up the edges of a driveway or around flower beds.
Grass shears are meant to handle grasses, weeds, and sometimes stems. Trying to cut through thicker materials may ruin the blades. Cutting through roots and branches is better left to another type of tool, such as pruning shears. Disclosure: BobVila. You agree that BobVila. All rights reserved. Expert advice from Bob Vila, the most trusted name in home improvement, home remodeling, home repair, and DIY.
Easily clip back these areas using the best grass shears for a beautifully manicured lawn. Check Latest Price.
More From Bob Vila. Home - Blog - Mechanical Projects Report. Grass Cutter In agricultural fields or in nursery or even in house hold growing grass is commonly found problem.
Removal of the grass is also a tedious job involving lot of human efforts. In the modern world as time for carrying out any thing has reduced drastically so as to be done the removal of grass involving use of a machine. Currently, he is working in the sheet metal industry as a designer.
Additionally, he has interested in Product Design, Animation, and Project design. He also likes to write articles related to the mechanical engineering field and tries to motivate other mechanical engineering students by his innovative project ideas, design, models and videos. Your email address will not be published. Save my name and email in this browser for the next time I comment. This site uses Akismet to reduce spam.
Learn how your comment data is processed. Introduction to Pressure Vessels Vessels, tanks, and pipelines that carry, store, or receive fluids are called pressure vessels. A pressure vessel is defined as a container with a pressure
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