Contents Chapter
1 Introduction 1
1.1 Current situation analysis of potato harvester 1
1.2 Development trend of potato harvester 3
1.3 Design work 3
Chapter 2 Design of overall scheme of potato harvester 4
2.1 Basic physical characteristics of potatoes 4
2.2 Design of overall structure 5
2.3 Working process principle 6
Chapter 3 Determination of transmission ratio and selection of reducer 7
3.1 Determination of transmission ratio 7
3.2 Selection of reducer 7
Chapter 4 Design of mechanical transmission 8
4.1 Design of pulley 8
4.2 Design of sprocket 12
4.2.1 Design purpose of sprocket 12
4.2.2 Design of sprocket 12
4.2.3 Selection of sprocket material 13
4.2.4 Size calculation of sprocket mechanism 13
4.3 Design and check of sprocket shaft 15
4.3.1 Chain Wheel shaft design 15
4.3.2 Sprocket shaft check 15
Chapter 5 Potato Harvester Digging Parts Design 17
5.1 Digging Shovel Composition 17
5.2 Mining Excavator Design 17
Chapter 6 Separation Part Design 19
6.1 Separation Conveyor Mechanism and working process 19
6.2 Determination of bar parameters 20
6.3 Determination of linear velocity of separation conveyor 20
6.4 Design of shaking wheel 21
6.4.1 The function of the shaking wheel 21
6.4.2 The structure of the shaking wheel 21
6.4.3 The description of the running speed of the shaking wheel 21 The
design of other parts in Chapter 7 23
7.1 The selection of coupling and the design of its shaft 23
7.1.1 Coupling 23
7.1.2 The design of the upper shaft of the coupling 23
7.2 The design and description of the bearing seat 23
7.2.1 The function of the bearing seat 23
7.2.2 The design of the bearing seat 24
7.2.3 Bearing seat installation precautions 24
7.2. 4 Maintenance of bearing seat 24
7.3 Design description of end cover 25
7.3.1 Function of end cover 25
7.3.2 Design of end cover 25
7.3.3 Installation instruction of bearing end cover 25
7.4 Design of ground wheel 25
7.5 Frame part Design 26
Conclusion
27 Acknowledgments 28
References 29
1.3 Design work
In general, compared to potato harvesting, analysis of a specific part of it V-belt, deceleration, shaking wheel, rack, digging shovel, drive chain, wheels, design calculations , and finally draw the detailed design of the program such as assembly drawings and some part drawings.
Chapter 2 Design of the Overall Scheme of Potato Harvester
2.1 The Basic Physical Characteristics of Potatoes
Our country has a vast territory, and the potato planting areas are also very extensive. The physical properties of potatoes in different places are also different. In order to make the designed potato harvester widely used , so the average physical characteristics of potatoes should be studied and summarized first.
Table 2.1 Characteristics of potatoes
Table 2.2 Cultivation techniques in main potato producing areas
At the same time, further investigations have been made on the cultivation methods of potatoes. There are two cultivation methods of potatoes, tuber cultivation and seed cultivation. Please refer to Figure 1, which shows the growth status of potatoes under the two cultivation methods. The soil gripping degree of the root system, where D0 is the caking depth of the potato tubers in the soil, D1 is the thickness of the potato tubers in the soil, D2 is the distribution thickness of the potato tubers underneath, and B1 is the distribution width of the potato stems. In general, D0 is in the range of 80-200mm, the deep one can reach 240mm, and B1 is in the range of 180-300mm.
This design is based on the above data to design a reasonable potato harvesting equipment.
