All about lawn mowers:
The beautification of the green space has always been one of the concerns of the green space officials, and advanced machines and tools, at the same time with simple and easy use, have been one of the most important needs of this matter.
When the name of lawn beautification is mentioned, the first machine that comes to mind is the lawn mower. Yes, lawnmowers are the most important tools for this, but there are spaces where it is impossible to use a lawnmower. Also, cutting the grass with a lawnmower is limited on the edge of the tables in relation to the distance between the deck and the blade. Also, the weeds that Most of them are wooden, they are also one of the other nuisances of urban beautification. As a result, the need to use another supplementary tool is felt.
Following these needs, the grasshoppers came to our aid. Lawnmowers are also widely used in agriculture and horticulture. This device is used instead of traditional cutting and pruning tools such as scythe, saw, knife, scissors, etc. for gardening and pruning and trimming plants.
Types of lawn mowers:
In terms of the power required to launch
Electric: An electric motor is used to start the lawnmower. Electric lawnmowers are a very suitable option for home use and centers where access to electricity is possible.
Engine: The power required to start the lawnmower is provided by a two-stroke or four-stroke single-cylinder, air-cooled gasoline engine. These lawnmowers can be used in different sizes of engines with different power for domestic to professional work.
Classification according to the way of movement
Lawnmower on the shoulder: It has a bicycle steering wheel and is carried by the user with the help of a vest. In the doshi lawn mower, the presence of a direct shaft in the transmission of the engine power to the blades of the machine has achieved high efficiency for the lawn mower. This direct shaft can direct the high power of the engine to the blades of the grass cutter with a good working efficiency, and at the same time, it has a low failure rate.
Their commands are fully available to the operators. The design position of the device with its long rod is such that with a little adjustment, the blade surface will be easily placed on the ground without the need for operators to bend down. In this way, it is enough for the operator to take the steering wheel of the lawnmower and cut a large area of plants with a little movement in his hands and waist position.
This design is suitable for working in many areas from agriculture to gardening. So that it is possible to create a high speed of action in working with doshi weeders. Such an approach has made the lawnmower to be among the professional machines.
Back mower: The engine is placed on the back of the operator by a chassis and backpack. In the power transmission section, a flexible tube and a spring shaft are used to transfer power to the smooth tube. The back models are easy to transport while working. They have a good balance and at the same time can create a high level of access; But the presence of flexible springs to transfer the power of the engine to the blades of the device has deprived them of their long-term functionality. The probability of breakdowns and problems in working with back mowers is much higher than with front models. On the other hand, the back weeder can never provide the maneuvering power and high working speed of the front weeder.
Wheeled lawnmower: for ease of working with the lawnmower, the engine of the device is placed on a chassis, and with the help of two wheels and a steering wheel, it allows the operator to be more comfortable while using the lawnmower. Working with a wheeled lawnmower is similar to working with Types of lawn mowers are common. This type of lawn mower, like all lawn mowers, has the advantage of being easy to operate and can easily cut dense weeds. Big wheels work well on rough terrain. However, they have less maneuverability than the types of push and back lawn mowers, although they provide more comfort for the operator on flat surfaces.
Types of lawnmower engines:
Two-stroke: Two-stroke engines do not have valves. This has made the structure of these types of engines simpler and lighter.
In two-stroke engines, one combustion stage takes place for each rotation of the engine crank. In four-stroke engines, one ignition takes place for every two revolutions of the crankshaft.
Single-stroke engines, unlike four-stroke engines, work in any direction. For this reason, their use on lawn mowers is very efficient. This is despite the fact that in four-stroke engines, due to the presence of oil flow, the engine must be positioned in the right direction.
Due to these reasons, two-stroke engines are cheaper and faster. Two-stroke engines have twice the power of four-stroke engines according to the way we explained.
The combination of low weight and twice the power of two-stroke engines has made the power-to-weight ratio in such engines to be the highest compared to most four-stroke engines.
Two-stroke engines can be used on lawnmowers in terms of engine volume and power, such as 260cc-330cc-430cc-520cc engines.
One of the most important differences between two-stroke and four-stroke engines is the absence of a valve in the two-stroke engine and the use of a mixture of gasoline and oil as fuel in the two-stroke engine.
Four-stroke: In four-stroke engines, we have one power stage for every two revolutions of the crankshaft. In each revolution of the crankshaft, one of the four stages of suction-compression-power and discharge is performed in these engines from the valve mechanism to enter the fuel mixture and The air enters the cylinder and the exhaust smoke is used. In the four-stroke engine, the gasoline and oil tanks are separate. In these engines, oil vapor lubrication technology is used.