The Research And Design Of A Power Vehicle Weth Single Crawler

At present, there are a large number of fruit on the mountainous and hilly area in our country. The transportation problem of fruits plagues the farmers when the harvest comes. Transportation by people and animals is low efficiency and a very heavy workload in the past.To the fruit harvest, a large number of fruits need to transport from orchard to the market in a short period of time. It seriously affects the development of orchard and fruit economic benefit of ascension due to the lack of transport machine. There is machine which can transport fruits from the top to the foot in the domestic. But the transportation problem in the orchard remains unresolved. At present, on the mountain of vertical transportation problems have be solved since large slope monorail and double rail transport aircraft. But it still depends on traditional livestock drag in the horizontal transport cart and badly in need of a mechanical power to solve the transport problem which is low efficiency and big workload. Considering the mountain special geography conditions, I choose crawler walking device to deal with it. For the convenience of a simple operation and cost saving at the same time to maintain stability and flexibility of body, design the single tracked carrier to solve this problem. The design uses a gasoline as the power source, a single crawler as the walking system, the worm gear driven and chain driven as the driven system, a belt tensioner as the clutch, and the frame welded by the steel pipes. The vehicle structure is simple, and easy to operate. The single crawler transporter employs the modular design concept, which is composed by the power plant, driven system, crawler-based walking system, frame system, widening devices and other major components. This paper includes the following sections:(1) The analysis and design for the overall structure. Taking the special geographical conditions and the hillside location into account, in order to achieve good adaptability and passing ability, we select the single track undercarriage. Single-track undercarriage is far less balanced than the double track, so, in order to maintain stability rather than flexibility, we need to have a analysis and research for the body’s gravity configuration. The machine is operated by a single person, so the size is small. In order to accommodate the power plant, driven system, running system and other parts, we need to optimize the structure design, as compact as possible.(2) The calculation of the main parameters and the selection of related parts. The vehicle needs the power to keep walking, so we calculate the required power based on the geographical conditions and the load. And then assign the transmission ratio and input power of each part, and calculate the related torque and other parameters. Finally, according to the power input, speed and torque choose the right components.(3)The tructure design of each part, including the crawler system, tensioning device, the body and widening devices, mainly the design calculations of the crawler and tensioning device. This section is a core part of the whole machine, we need to selecte the track the requirements and design and machine the track wheels and tensioner which fited supporting. When the machine walking, crawler undercarriage need to meet a reliable and smooth operation.(4) After complete the processing, we must test vehicle and analysis these problems which found during the testing process and improve it. There is a big differenct between theory and practice. In the actual production process, cause a lot of unexpected problems, so in need continuous improvement to meet the needs to solve the problem.