1. Harvest cleanly and lay them neatly. They can be laid in strips or stacked.
2. Adapt to plains, hills, terraces, triangles and other large and small fields and mud fields.
3. It can be used to harvest wheat, rice, highland barley, hemp, beans and other crops. Replace the corresponding cutter, install the upper and lower pallets and a safe protective cover. 4. It can also harvest shrubs, pastures, reeds and tea garden branches and rest the flower beds
5. Simple operation and convenient maintenance .
Function expansion: It can be used to harvest wheat, rice, highland barley, hemp, beans and other crops. Replace the corresponding knives, install the upper and lower pallets and safety protective covers, and you can also harvest shrubs, pastures, reeds, tea plantation branch pruning and flower beds. It is used for forest land clearing, young forest tending, secondary forest transformation and forest tending and logging, etc. to cut shrubs and weeds, prune branches, cut small trees, cut bamboo and other operations. Equipped with some replaceable additional devices or equipment, the brush cutter can also be used to harvest crops such as rice and wheat, as well as pump water, drill holes, and spray pesticides. The development of brush cutters is closely related to the development of small power machinery. After World War II, chain saw manufacturers in the Federal Republic of Germany, the United States, Sweden and other countries used drive shafts and cutting working parts as accessories for chain saws for cutting grass and shrubs. On this basis, Japan introduced and developed automatic harvesters. Portable automatic harvesters are divided into two types: side-mounted and backpack-type: ① Side-mounted automatic harvesters use hard shaft transmission and are mainly composed of engines, transmission systems, clutches, working parts, control devices, and side-mounted belts. One end of the transmission shaft is equipped with a 0.75-2 kW single-cylinder two-stroke air-cooled gasoline engine and a centrifugal friction clutch; the other end is equipped with working parts consisting of a reducer and a cutting tool. There are many types of working parts, the commonly used ones are circular saw blades, razor blades or nylon wire. During operation, hang the shackle on the aluminum alloy sleeve of the transmission shaft on the strap under the operator's shoulder, hold the handle, and swing the hard shaft laterally to complete operations such as cutting weeds and shrubs. The machine weighs about 6 to 12 kilograms and rotates at about 4500 to 5000 rpm. ②Backpack automatic harvester. It is driven by a flexible shaft. Its general structure is similar to that of a side-mounted brush cutter. The difference is that the engine is carried on the operator's back, and the cutting parts are driven by a flexible shaft. The engine power is generally 0.75 to 1.2 kilowatts. The engine and the back frame are connected at two points and equipped with special rubber parts to isolate vibration. The flexible shaft is a steel wire flexible shaft set in the hose to transmit torque. The hose is a threaded pipe wrapped with steel tape wrapped in a metal braid covered with a rubber protective sheath to prevent dust from intruding into the shaft and to maintain lubricating oil on the shaft surface. The cutting width is generally between 1.5 and 2 meters.
The walking wheels of the walk-behind automatic harvester support the weight of the machine. People push the machine forward, and the engine drives the working parts to perform cutting and irrigation operations. Its structure and working principle are similar to those of portable brush cutters.
The suspended automatic harvester is hung behind the tractor, and the power output shaft drives the working parts to rotate. It is suitable for large-area cutting and brushing operations. It is mainly composed of frame, saw blade, transmission device, suspension device and push plate. When cutting shrubs, the tractor drives backwards at a working speed of 5 km/h and can cut shrubs with a diameter of 10 cm. In recent years, wheat combine harvesters have developed rapidly, with increasingly mature technology and increasingly reasonable structures. However, further development faces huge challenges in applicability. Small combine harvesters have their own unique applicability and therefore have their own market level.
1. Small combine harvesters are a must-have tool for farmers in mountainous areas to get rich
Jingxing County, Shijiazhuang City, Hebei Province is a mountainous county. 10,700 hm2 of wheat are grown annually, mostly in mountainous areas, with small and irregular plots.
For many years, there were only 100 combine harvesters in the county, but in 2000, small combine harvesters were sold well in Jingxing Mountain District. The reasons: ① The terrain features in mountainous areas are only suitable for small computers. ② Farmers in mountainous areas engage in mining, ash burning, transportation and other businesses, which transfers their labor and increases their income, so they have purchasing power. ③The price of machine-harvested wheat is low, machine users think it is cost-effective, and organic farmers think it can make them rich. Therefore, small combine harvesters are attractive.
In 2000, when the harvester operation charges were reduced, the average income in Taiwan could
reach more than 8,000 yuan. ④The county agricultural machinery management department holds operator training courses and organizes machine harvesting services. Machine purchasers have confidence in using the machine properly.
⑤ Combined harvesting is faster than segmented harvesting. During the farming season, the second crop of corn can be planted earlier, and double cropping in a year can increase efficiency and increase production.
It avoids the impact of cold weather in mountainous areas that delays wheat planting.
The mountainous area of ??Hebei Province accounts for 62% of the land area. The market for small agricultural machinery is very dynamic. With the development of mountainous areas and farmers becoming richer, the market for small combine harvesters will become more and more prosperous. The bigger.
2． Small combine harvesters are a transitional product for farmers in plain areas to get rich
Taking Hebei Province as an example, the development of combine harvesters can be roughly divided into the following situations: ① Experimental development from low-priced small ones
Gradually develop towards medium and large scale. Xinji Market, the earliest and fastest-growing market, started around 1990 by purchasing old machines at low prices from farms in Northeast China. At that time, a Beijing-2.5 harvester sold for 60,000 yuan, while an old Dongfeng-5 harvester in a Northeast state-owned farm only cost about 10,000 yuan. ② The rural economy in plain areas is further developing, but farmers are not wealthy enough and have not been using combine harvesters for a long time. Small combine harvesters are developing rapidly and are very dynamic. Suzhou City in Anhui Province, Tanghe County in Henan Province, Linyi City in Shandong Province and Cangzhou City in Hebei Province to the east of National Highway 106 are popular for their good quality and low price of small combine harvesters. ③Some small machines have been gradually replaced by medium-sized self-propelled combine harvesters. Renqiu City, Hebei Province is a plain area, with an average annual wheat cultivation of more than 30,000 hm2. In 2000, there were 199 new combine harvesters, of which 82 were self-propelled models and medium-sized backpack models. Accounting for 14,
The cutting width is less than 1.5m accounting for 4. Local operators and users say that self-propelled combine harvesters are popular because they harvest quickly. ④Product quality
is the key to guiding sales. ⑤The sales of medium-sized self-propelled combine harvesters are related to the reform of planting methods. In the past few years, there was a lot of intercropping of wheat and corn, which was suitable for small combine harvesters. However, now most of them are sown with stubble of summer corn, and the restrictions and requirements on the size of the cutting width have been relaxed.
In some areas, wheat is no longer intercropped with corn, and farmers' economic conditions are relatively good.
So medium-sized self-propelled ones are sold in large numbers. However, as the phenomenon of "Maike" making less money becomes more and more serious, the harvesting of cross-regional operations will gradually turn into a local harvesting style. Where the development of small combine harvesters has slowed or stopped, it will be revived. The reasons are: ① The operating cost is high. ②There is a surplus of machines and low charges. Instead of users intercepting machines, blocking machines, and holding coins in previous years
there are multiple machines parked on the ground, competing for work, so the harvesting fees are getting lower and lower. ③The drought is severe, growth is not good, and grain prices are low. The above three aspects will be inevitable in the future, which will dilute the concept of "buying machines to harvest and make money".
However, it is impossible for wheat to regress to the traditional segmented harvesting method without using machines. , there will be situations where small combine harvesters with low investment, quick results, convenience and speed will be used.
3． The small combine harvester is a product that relies on intercropping for more than one year of ripening.
In order to make full use of light and heat resources and achieve agricultural efficiency, intercropping to achieve more than one year of ripening is the development direction, and also
p>It is a planting method gradually recognized by farmers. Especially in some cool areas with an altitude of about 1500m and a latitude greater than 42°, the accumulated temperature limit required for crops is not guaranteed, but the requirements can be met through intercropping. Zhongwei and Zhongning in Ningxia, Zhangye and Jinchang in the Hexi Corridor in Gansu, Xinglong and Zunhua in Hebei, Jinzhou and Huludao in Liaoning, etc., mostly pass through small towns
Intercrops such as wheat, corn, broad beans and sunflowers yield two crops a year.
In order to give full play to local advantages, some areas promote intercropping of cotton and wheat
and intercropping of dates and grains. For example, the golden jujubes in Cangzhou and the summer-sown cotton in Handan have made great progress. Harvesting wheat in intercropping fields
Due to space and row spacing limitations, using a small combine harvester has strong advantages. Anyang and Xinxiang in Henan also have a method of planting corn in wide rows, that is, sowing corn on the back of a border more than 1m wide, taking advantage of the moisture before harvesting, so as to delay
As the corn grows longer, the quality will improve. When harvesting wheat in this field, a small combine harvester will also be used.
The development trend of small harvesters is to use new materials to further reduce weight; use low-vibration engines and advanced vibration reduction and isolation devices and rationally configure parts to reduce the harm of vibration to the human body; improve mechanical The processing and assembly accuracy is improved, the suction and exhaust system is improved to reduce noise; various safety protection devices are added to improve operational safety; a shrub chopping device is added to the hanging brush cutter to simplify the cleaning process of cut shrubs