Lawn mower are also known as grass cutter , lawn mowers, lawn trimmers, etc. The lawn mower is a mechanical tool for mowing lawns, vegetation. And it is composed of a cutter head, an engine, a traveling wheel, a traveling mechanism, a blade, an armrest, and a control portion. The cutter head is mounted on the traveling wheel, and the blade is mounted on the engine. The shaft of the engine is equipped with a blade. The blade make uses of the high-speed rotation of the engine to saving the working time of the weeding worker and reducing a large amount of human resources.
Before the 19th century, people used long-handled trowels to cut grass. This is a skill job and it need skill to cut the grass.
A British engineer named Thomas was the first person come out make a mower. He invent the first lawn mower and obtained the patent in 1805. It was a cumbersome machine with a ring-shaped blade and it didn’t work very well.
Entering the 21st century, with science and technology continue to develop, lawn mowers are constantly being updated, and the function of machine was getting better .
The lawn mower is mainly used in garden decoration trimming, grass trimming, urban streets, green spots, pastoral pruning, field weeding, especially grassland and grassland in the park, other grassland , specially for football field, private villa garden, and agriculture and pasture. It can also be used for the autumn harvest.
However, lawn mowers have certain limitations in cutting grass in rural fields, land, and mountains due to uneven terrain, power supply methods, and portability of lawn mowers.
Nowadays , the lawn mower is used a gasoline lawn mower, also known as a gasoline saw chain . It is widely used for lawn trimming and beautification of park grasslands, green belts, factory grasslands, golf courses, home gardens, grasslands, orchards.
The mower can be divided into two categories: manual mowers and electric mowers. Electric lawn mowers can be divided into the following two types:
1. Rotary mower: The grass was cut by the blade on the high-speed engine. The cutting speed (the peripheral speed of the blade edge) is as high as 60 to 90 m/s. And the work speed can reach more than 15 km/h in stable performance, the feature of this machine is very adaptable to neat pasture .And for high intense grassland or not be neat grass , it will need big power machine.
2. Reciprocating mower: The grass is cut by the sheared move of the moving knife and the fixed knife on the cutter. Its characteristics are that the cutting surface is neat and tidy, the machine power required is small; But it is not suit for different growth states of pasture, which is easy to block. It is idea for flat natural pastures and small size artificial grasslands . The vibrates of cutter is big, which limited work speed . The cutting speed of the sew chain is generally less than 3 m / s, and the speed of forward work is generally 6-8 km.