Design and development of a new type of greenhouse combined ground preparation machine

Design and development of a new type of shed combined floor preparation machine. In order to improve production efficiency and reduce labor intensity, a new type of greenhouse combined land preparation machine was designed according to agronomic requirements. The machine is equipped with a special tractor for greenhouses, which can complete cooperative operations such as rotary tillage, soil crushing and ridging. Once, the soil surface is brought to a state to be sown. According to the specific requirements of land preparation in the shed, a tillage machine that can adapt to the operation in the shed is designed. The machine uses a combination of hydraulic and mechanical, can achieve horizontal ridging operations. At the same time, in the process of the machine running forward, the ridging device can be perpendicular to the forward direction to raise the ridge direction, by adjusting the ridging device can change the ridge shape and ridge distance, so that the ridge shape and ridge distance can meet the agronomic requirements of different crops and regions.

Combined ground preparation machine: 1. overall structure and power transmission system

1. Overall structure

The machine can complete the two joint soil preparation operations of rotary tillage and soil breaking and ridging at one time.

2. Power transmission system

The power of the machine is transmitted from the tractor rear power output shaft to the rotary bevel gear box through the universal joint assembly. After the rotary bevel gear box changes speed, the power is transmitted to the rotary side gear box. Finally, the rotary side box transmits the power to the rotary cutter shaft assembly to realize the rotary tillage operation. In order to realize the left and right movement of the machine tool, a power transmission structure of hexagonal shaft and hexagonal sleeve is adopted between the middle bevel gear box and the side gear box. The inside of the second shaft of the middle bevel gear box is a hexagonal sleeve structure, and the side box transmission shaft is a hexagonal shaft structure, which ensures the lateral movement and power transmission of the machine tool.

Combined ground preparation machine: 2. main working parts

1. Frame structure

It consists of two 76mm 8mm round pipes as cross beams, and the middle of the two side plates is welded with bolts and rotary tillage cover plates. The overall structure of the frame is firm, which ensures that the machine will not deform during operation and improves the reliability of the machine.

2. Main gearbox structure

The intermediate bevel gear box consists of a large bevel gear, two shafts, a box and a shaft. The first shaft of the intermediate box eliminates the traditional cup body mounting structure, simplifies the mounting structure, and reduces the processing cost. The second shaft adopts the hollow structure of the external spline inner square sleeve, which not only simplifies the structure, but also ensures the lateral movement of the machine tool.

3. Rotary tillage side box assembly

The side gearbox changes the overall casting structure of the traditional gearbox housing, using steel plate as the gearbox housing. The gears, shafts and other transmission components of the gearbox are connected with the shell, and the shell is in a state of leakage, and then a protective cover stamped with a thin plate is installed on the outside. The gearbox has the characteristics of simple structure, convenient disassembly and assembly, easy maintenance, light weight and low manufacturing cost.

4. Ridge Components

The ridging assembly consists of a deep loosening shovel base, a deep loosening shovel handle, a shovel tip and a U-shaped clamp.

5. Soil covering components

The cover assembly consists of a cover plate, a spring rod, a spring frame, a spring pin shaft and a long and short spring.

Combined ground preparation machine: three. Workflow and Scope of Application

1. Work process

After the commissioning of machines and tools is completed, farming and soil preparation can be carried out. During operation, the power of the tractor output shaft is transmitted to the rotary tiller box through the main drive shaft. After the speed of the rotary tillage umbrella box is changed, the power is transmitted to the rotary tillage side box. Finally, the rotary side box transmits the power to the rotary cutter shaft assembly to realize the rotary tillage operation. When working, if you encounter the plot on the edge of the shed, the frame will move horizontally through the expansion and contraction of the oil cylinder to achieve the purpose of no dead corners. 2. Scope of application

The machine is used in conjunction with a tractor for shed room and dry land farming. The machine can realize leveling or ridging operation according to agronomic requirements, and the ridge shape and ridge spacing can be adjusted. After the operation, the field conditions meet the agronomic requirements of sowing and reach the state of waiting for sowing.

Combined ground preparation machine: four. Existing problems and solutions

Due to the different structural forms of tractors in different places, some tractors do not have hydraulic output devices, which leads to some problems when the machine is matched with the tractor. The solution is: first, according to different tractor structure, hydraulic output device can be installed, which is relatively simple, and the required accessories are sold in the market; secondly, the structure of hydraulic lateral movement is changed, and the tractor lateral movement device without hydraulic output is designed as a mechanical structure.

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