At present, in the longitudinal transportation of mountainous areas, there are already self-propelled monorail and double-track transporters, but the horizontal transportation still relies on the traditional livestock dragging and wheelbarrow-based approach, and there is an urgent need for a power machine to solve the problem of transportation within the mountainous orchards. Considering the special topographic conditions of the mountainous area, the crawler structure was selected by comparing several transportation methods such as wheeled, crawler and hand-held. In order to facilitate the operation of a single person and simplify the structure to a large extent, reduce costs, while maintaining the flexibility and stability of the vehicle, a single track walking device was selected as the core device. The design selects gasoline engine as the power source, single track walking mechanism as the walking system, worm gear drive and chain drive as the transmission system, belt tensioning wheel as the clutch, the whole vehicle structure is simple and easy to operate. The single-tracked transport vehicle adopts modular design idea and consists of four major parts, such as power unit, transmission system, track walking system, frame and widening device.
The main work includes the following parts:
(1) Analysis and design of the overall structure. Considering the special geographical conditions and location of the hillside, the single-track walking device is chosen in order to achieve good passability and certain flexibility. The single-tracked walking device is not as balanced as the double-tracked one, and the gravity configuration of the vehicle needs to be analyzed and studied in order to maintain smoothness. The vehicle is operated by a single person and is therefore small in size. In order to accommodate several parts at the same time, such as the power unit, the drive unit and the travel unit, the structural design needs to be optimized and as compact as possible.
(2) The calculation of the main parameters and the selection of relevant components. The vehicle needs power to travel, and calculate the required power according to the geographical conditions and load; then allocate the transmission ratio and input power of each part, and calculate the relevant torque and other parameters. After the selection of suitable parts according to the power input, speed and torque.
(3) The design and calculation of each part of the structure, including the track walking device, transmission device, power source and body and widening device. The main is the design calculation of the track walking device, this part is the core part of the whole vehicle body, need to select the suitable track and design and process the matching track wheel and guide wheel. When the vehicle is running, the track running device needs to cooperate with reliable and smooth operation.
(4) After finishing the processing, the vehicle is tested and performance tested, and the problems found during the test are analyzed and improved. In the actual processing and production process, there are great differences, there will be many problems that have not been considered, so in the need for continuous improvement to solve problems to meet the requirements of use.