Pit digging device for fruit tree planting
By designing a pit digging device for fruit tree planting, the lifting and crushing structures are used to deal with stone problems in mountainous and hilly areas, flexible excavation and crushing are achieved, the problems of soil loss and ecological impact are solved, and the growth environment of fruit tree is improved.
Patent Information
- Application Number
- CN202420913764.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-28
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-04-28
AI Technical Summary
When planting fruit trees in mountainous and hilly areas, the existing technology is difficult to effectively deal with larger stones, which leads to cumbersome and time-consuming soil excavation process, and may destroy the soil structure and ecological balance, affecting the growth and environment of fruit trees.
A pit digging device for fruit tree planting is designed, including a trolley, lifting structure, excavation structure, crushing structure and conveying structure. The flexible excavation and transportation of soil and stones are achieved through the motor driving the twisted dragon and threaded rod, and the gears and rotors are used. Perform crushing of stones to prevent soil blockage and soil loss.
It has achieved flexible excavation of planting pits of different depths in hilly areas, crushed and treated stones, reduced soil loss, retained the protective effect of stones, improved soil breathability and water retention, and helped fruit tree root system development and soil fertility.
Smart Images

Figure CN222216411U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fruit tree planting, in particular to a pit digging device for fruit tree planting. Background Art
[0002] Planting fruit trees in mountainous and hilly areas is a challenging task. These areas usually have complex terrain, poor soil and contain a large amount of stones. If these stones are not handled, they will have a great impact on the planting of fruit trees. The stones occupy valuable space in the soil, restrict the growth and expansion of the fruit tree roots, thereby affecting the fruit tree's absorption of water and nutrients. In addition, stones may also affect the soil's water retention and aeration, further reducing the environmental conditions for fruit tree growth.
[0003] When planting fruit trees in mountainous and hilly areas, simply digging away the stones will indeed bring about a series of negative effects. First of all, the process of digging away the stones is itself a tedious and time-consuming task, which greatly increases the difficulty and cost of planting fruit trees. At the same time, the natural structure of the soil may be destroyed in the process of digging stones, causing the soil to become loose and increasing the risk of soil loss. Secondly, digging away the stones will lead to a decrease in soil fertility. Stones usually play a role in retaining water and nutrients in the soil. Digging away the stones means losing this part of the natural soil conditioner, which in turn affects the water retention and fertility of the soil, which is not conducive to the growth of fruit trees because fruit trees need sufficient water and nutrients to support their growth and development. In addition, if the dug stones are not handled properly, they may also cause damage to the surrounding environment. Randomly discarding stones may destroy the local ecological balance and affect the growth of vegetation and animal habitats. In extreme cases, a large number of discarded stones may also cause environmental problems such as soil erosion, causing long-term damage to the local ecosystem.
[0004] Chinese patent document CN213280618U discloses a pit digging device for fruit tree planting, comprising a work plate, the surface of which is fixedly connected to an electric telescopic rod, the output end of which is fixedly connected to a drive frame, the top of the inner cavity of the drive frame is fixedly connected to a drive motor, the output end of the drive motor is fixedly connected to a rotating rod, the bottom of the rotating rod penetrates the drive frame and extends to the bottom of the drive frame; however, the following defects still exist during implementation:
[0005] Although the device in the above document solves the problem that the existing pit digging devices for fruit tree planting on the market do not have the function of water supply and pit digging, the device in the above document cannot handle the larger stones excavated when planting fruit trees in hilly areas. Utility Model Content
[0006] The purpose of the utility model is to provide a pit digging device for fruit tree planting to solve the problems raised in the above background technology.
[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:
[0008] A pit digging device for planting fruit trees comprises a cart; a lifting structure is fixedly connected to one side of the upper end of the cart, a digging structure is fixedly connected to one side of the lifting structure, a crushing structure is fixedly connected to the middle part of the upper end of the cart, the crushing structure comprises a second shell, two rotors are rotatably connected to the inner cavity of the second shell, a third motor is fixedly connected to one side of the outer surface of the second shell, and the output end of the third motor passes through the outer surface of the second shell and extends to the inner cavity of the second shell, the output end of the third motor is fixedly connected to one of the rotors, the two rotors are fixedly connected to the sides away from the third motor, and the two gears are meshed with each other, the upper end of the second shell is fixedly connected to the conveying structure, the lower end of the second shell is fixedly connected to a funnel, and the lower part of the funnel is fixedly connected to a valve.
[0009] A further improvement of the technical solution of the utility model is that the excavation structure includes an outer shell one, an inner cavity of the outer shell one is rotatably connected to an auger, the upper end of the outer shell one is fixedly connected to a motor two, and the output end of the motor two passes through the upper end of the outer shell one and extends to the inner cavity of the outer shell one, the output end of the motor two is fixedly connected to the upper end of the auger, an upper side of the outer shell one close to the conveying structure is provided with an unearthed opening, and the inner cavity of the unearthed opening is fixedly connected to a slide plate.
[0010] The above technical solution is adopted, in which the auger is driven to rotate by the second output end of the motor, so that the auger can be used to transport the excavated soil and stones through the excavation port into the inner cavity of the slide plate, and then the soil and stones are transported to the conveying structure through the slide plate.
[0011] A further improvement of the technical solution of the utility model is that the lifting structure includes a support seat, the lower end of the support seat is fixedly connected to the upper end of the trolley, the inner cavity of the support seat is slidably connected with a connecting block, the inner cavity of the connecting block is fixedly connected to the outer surface of the outer shell, the side of the connecting block away from the outer shell is threadedly connected with a threaded rod, the upper end of the support seat is fixedly connected with a motor, and the output end of the motor passes through the upper end of the support seat and extends to the inner cavity of the support seat, the output end of the motor is fixedly connected to the upper end of the threaded rod, the inner cavity of the support seat is rotatably connected to the threaded rod, the inner cavity of the support seat is fixedly connected with a guide rod, and the guide rod is slidably connected to the connecting block.
[0012] The above technical solution is adopted, in which the threaded rod is driven to rotate by an output end of a motor, so that the threaded rod can be used to drive the connecting block to be raised and lowered, and the connecting block can be used to drive the excavation structure to be raised and lowered, so that the depth of soil excavation can be flexibly adjusted according to needs when planting fruit trees.
[0013] A further improvement of the technical solution of the utility model is that the conveying structure includes a shell three, the lower end of the shell three is fixedly connected to the upper end of the shell two, the side of the shell three close to the shell one is fixedly connected to a support plate structure, and the middle part of the shell three is rotatably connected to a stirring structure.
[0014] By adopting the above technical solution, through the cooperation between the outer shell three and the stirring structure, the stirring structure can be used to stir the soil and stones transported to the inner cavity of the outer shell three, so as to prevent a large amount of soil and stones from accumulating in the inner cavity of the outer shell three, thereby blocking the inner cavity of the outer shell three and affecting the outer shell three from transporting the soil and stones to the inner cavity of the outer shell two.
[0015] A further improvement of the technical solution of the utility model is that the support plate structure includes a base plate, a plurality of limit rods are fixedly connected to the inner cavity of the base plate, springs are wound around the outer surfaces of the limit rods, a connecting plate is slidably connected to the inner cavity of the base plate, and the connecting plate is slidably connected to the plurality of limit rods.
[0016] The above-mentioned technical solution is adopted, in which the movement of the connecting plate can be limited by the cooperation between the connecting plate and a number of limit rods to prevent the connecting plate from leaving the moving range. The limit rods can drive the connecting plate to move toward the direction of the slide plate, so that the upper end of the connecting plate and the lower end of the slide plate can always fit tightly together, preventing the soil and stones in the inner cavity of the slide plate from being transported to the three inner cavities of the outer shell.
[0017] A further improvement of the technical solution of the utility model is that the slide plate is arranged obliquely, and the lower end of the slide plate is tightly fitted with the upper end of the connecting plate.
[0018] The above technical solution is adopted. In this solution, the slide plate is set at an angle so that the soil and stones in the inner cavity of the slide plate are accelerated to roll into the third inner cavity of the outer shell, thereby accelerating the transportation speed of the soil and stones.
[0019] A further improvement of the technical solution of the utility model is that the stirring structure comprises two connecting disks, the two connecting disks are fixedly connected to the outer shell three, and the opposite surfaces of the two connecting disks are rotatably connected with stirring fans.
[0020] The above technical solution is adopted, in which the stirring fan and the connecting plate are cooperated, so that the stirring fan can be used to transport soil and stones evenly to the three inner cavities of the outer shell, preventing too much soil and stones from being transported at one time, which would cause the rotor to get stuck, thereby affecting the device's crushing process of the stones.
[0021] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:
[0022] 1. The utility model provides a pit digging device for planting fruit trees. The lifting structure can drive the digging structure to lift, so that the digging structure can dig planting pits of different depths as needed. Through the cooperation of the digging structure and the conveying structure, the soil and stones dug by the digging structure can be conveyed to the inner cavity of the second shell, and then one of the rotors is driven to rotate by the motor three. Then, with the cooperation of the two gears, the two rotors can be driven to crush the soil and stones conveyed to the inner cavity of the second shell, and then the crushed soil and pebbles will be collected in the inner cavity of the funnel. The discharge of the soil and pebbles in the inner cavity of the funnel is controlled by a valve, so that the crushed soil and pebbles can be used to fill the pit after the fruit trees are planted, thereby reducing soil loss, while retaining the protective effect of the stones on the soil, and the pebbles can increase the air permeability and water retention of the soil, which is conducive to the development of the root system of the fruit trees and improves the fertility of the soil.
[0023] 2. The utility model provides a pit digging device for fruit tree planting. Through the cooperation of the stirring fan and the connecting plate, the stirring fan can be used to transport soil and stones evenly to the three inner cavities of the outer shell, preventing too much soil and stones from being transported at one time, which would cause the rotor to get stuck, thereby affecting the device's crushing of the stones. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The utility model will be further described below in conjunction with the accompanying drawings.
[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0026] Figure 2 It is a schematic diagram of a cart of the utility model;
[0027] Figure 3 This is a schematic diagram of the crushing structure of the utility model;
[0028] Figure 4 It is a schematic diagram of the excavation structure of the utility model;
[0029] Figure 5 This is a schematic diagram of the lifting structure of the utility model;
[0030] Figure 6 It is a schematic diagram of the conveying structure of the utility model;
[0031] Figure 7 This is a schematic diagram of the support plate structure of the utility model;
[0032] Figure 8 This is a schematic diagram of the stirring structure of the utility model;
[0033] In the figure: 1. cart; 2. lifting structure; 21. support seat; 22. connecting block; 23. motor 1; 24. threaded rod; 25. guide rod; 3. excavation structure; 31. shell 1; 32. auger; 33. motor 2; 34. excavation port; 35. slide plate; 4. crushing structure; 41. shell 2; 42. motor 3; 43. rotor; 44. gear; 5. conveying structure; 51. shell 3; 52. support plate structure; 521. bottom plate; 522. limit rod; 523. spring; 524. connecting plate; 53. stirring structure; 531. connecting plate; 532. stirring fan; 6. funnel; 7. valve. DETAILED DESCRIPTION
[0034] The present invention is further described in detail below in conjunction with the embodiments:
[0035] Example 1
[0036] like Figure 1-8 As shown, the utility model provides a pit digging device for planting fruit trees, including a cart 1; a lifting structure 2 is fixedly connected to one side of the upper end of the cart 1, a digging structure 3 is fixedly connected to one side of the lifting structure 2, a crushing structure 4 is fixedly connected to the middle part of the upper end of the cart 1, and the crushing structure 4 includes a second shell 41, and two rotors 43 are rotatably connected to the inner cavity of the second shell 41, a motor 3 42 is fixedly connected to one side of the outer surface of the second shell 41, and the output end of the motor 3 42 passes through the outer surface of the second shell 41 and extends to the inner cavity of the second shell 41, the output end of the motor 3 42 is fixedly connected to one of the rotors 43, and the two rotors 43 are fixedly connected to one side of the motor 3 42, and the two gears 44 are meshed with each other, the upper end of the second shell 41 is fixedly connected to a conveying structure 5, the lower end of the second shell 41 is fixedly connected to a funnel 6, and the lower part of the funnel 6 is fixedly connected to a valve 7.
[0037] In this embodiment, the entire device can be pushed to move by the cart 1, and the lifting structure 2 can drive the excavation structure 3 to be lifted and lowered, so that the excavation structure 3 can dig planting pits of different depths according to needs, the excavation structure 3 can be used to excavate the soil, and then the soil and stones can be delivered to the conveying structure 5, and the crushing structure 4 can be used to crush the compacted soil and stones. The conveying structure 5 can evenly convey the soil and stones excavated by the excavation structure 3 to the inner cavity of the crushing structure 4 to prevent too much soil and stones from being conveyed to the inner cavity of the outer shell 41 at one time, thereby causing the rotor 43 to be blocked or stuck, etc. The crushed soil and pebbles can be collected by the funnel 6, and the discharge of soil and pebbles by the funnel 6 can be controlled by the valve 7.
[0038] Example 2
[0039] like Figure 2 , Figure 4 , Figure 5 As shown, on the basis of Example 1, the utility model provides a technical solution: preferably, the excavation structure 3 includes a shell 1 31, the inner cavity of the shell 1 31 is rotatably connected to a screw 32, the upper end of the shell 1 31 is fixedly connected to a motor 2 33, and the output end of the motor 2 33 passes through the upper end of the shell 1 31 and extends to the inner cavity of the shell 1 31, the output end of the motor 2 33 is fixedly connected to the upper end of the screw 32, and an unearthed port 34 is opened on one side of the upper part of the shell 1 31 close to the conveying structure 5, and a slide plate 35 is fixedly connected to the inner cavity of the unearthed port 34;
[0040] The lifting structure 2 includes a support seat 21, the lower end of the support seat 21 is fixedly connected to the upper end of the trolley 1, the inner cavity of the support seat 21 is slidably connected with a connecting block 22, the inner cavity of the connecting block 22 is fixedly connected to the outer surface of the outer shell 31, and the side of the connecting block 22 away from the outer shell 31 is threadedly connected with a threaded rod 24, the upper end of the support seat 21 is fixedly connected with a motor 23, and the output end of the motor 23 passes through the upper end of the support seat 21 and extends to the inner cavity of the support seat 21, the output end of the motor 23 is fixedly connected to the upper end of the threaded rod 24, the inner cavity of the support seat 21 is rotatably connected to the threaded rod 24, the inner cavity of the support seat 21 is fixedly connected with a guide rod 25, and the guide rod 25 is slidably connected to the connecting block 22.
[0041] In this embodiment, the entire device is pushed to the area where planting is required by pushing the cart 1, and then the motor 2 33 is operated to drive the auger 32 to rotate by utilizing the output end of the motor 2 33, and then the motor 1 23 is operated to drive the threaded rod 24 to operate by utilizing the output end of the motor 1 23, so that the cooperation between the threaded rod 24 and the connecting block 22 can be utilized to drive the excavation structure 3 to be raised and lowered, so that planting pits of different depths can be excavated according to needs, and then the soil excavated by the auger 32 will be transported to the inner cavity of the slide plate 35 through the excavation port 34.
[0042] Example 3
[0043] like Figure 7 As shown, on the basis of Example 2, the utility model provides a technical solution: preferably, the support plate structure 52 includes a bottom plate 521, a plurality of limit rods 522 are fixedly connected to the inner cavity of the bottom plate 521, the outer surfaces of the limit rods 522 are wound with springs 523, the inner cavity of the bottom plate 521 is slidably connected to a connecting plate 524, the connecting plate 524 is slidably connected to the plurality of limit rods 522, the slide plate 35 is inclined, and the lower end of the slide plate 35 is tightly fitted with the upper end of the connecting plate 524.
[0044] In this embodiment, when the shell 31 moves downward, the slide plate 35 will be moved together, and then the slide plate 35 will apply a force to the connecting plate 524, thereby driving the connecting plate 524 to slide in the inner cavity of the bottom plate 521, thereby driving the plurality of springs 523 to contract. When the shell 31 moves upward, the slide plate 35 will be moved upward together, thereby releasing the force applied to the connecting plate 524, and then under the elastic force of the spring 523, the connecting plate 524 will be driven to move upward in the inner cavity of the bottom plate 521.
[0045] Example 4
[0046] like Figure 3 , Figure 6 , Figure 8 As shown, on the basis of Example 3, the utility model provides a technical solution: preferably, the conveying structure 5 includes a shell three 51, the lower end of the shell three 51 is fixedly connected to the upper end of the shell two 41, the shell three 51 is fixedly connected to a support plate structure 52 on one side close to the shell one 31, the middle part of the shell three 51 is rotatably connected to a stirring structure 53, the stirring structure 53 includes two connecting plates 531, the two connecting plates 531 are fixedly connected to the shell three 51, and the opposite surfaces of the two connecting plates 531 are rotatably connected to a stirring fan 532.
[0047] In this embodiment, the soil and stones transported to the inner cavity of the slide plate 35 will then roll through the inner cavity of the slide plate 35 into the inner cavity of the outer shell three 51, and then fall onto the stirring fan 532, thereby driving the stirring fan 532 to rotate in the inner cavity of the outer shell three 51, thereby stirring the soil and stones in the inner cavity of the outer shell three 51, preventing the soil and stones in the inner cavity of the outer shell three 51 from being too much and causing blockage. At the same time, the stirring of the stirring fan 532 can also be used to allow the conveying structure 5 to transport the soil and stones to the inner cavity of the outer shell two 41 in a quantitative manner, thereby preventing the rotor 43 from being blocked by transporting too much soil and stones at one time. and stuck, by running the motor three 42, the output end of the motor three 42 can be used to drive one of the rotors 43 to rotate, and then the mutual meshing of the two gears 44 will drive the other rotor 43 to rotate, so that the two rotors 43 and the outer shell two 41 cooperate with each other, and the soil and stones transported to the inner cavity of the outer shell two 41 can be crushed, and then the crushed soil and pebbles will fall into the inner cavity of the funnel 6, and the discharge of the funnel 6 can be controlled by the valve 7. When the planting pit excavated by the excavation structure 3 is planted with fruit trees, the soil and pebbles in the inner cavity of the funnel 6 can be filled back into the planting pit.
[0048] The working principle of the pit digging device for fruit tree planting will be specifically described below.
[0049] like Figure 1-8As shown, when it is necessary to plant fruit trees in mountainous and hilly areas, the entire device is first pushed to the area where planting is required by pushing the cart 1, and then the motor 2 33 is operated to drive the auger 32 to rotate by using the output end of the motor 2 33, and then the motor 1 23 is operated to drive the threaded rod 24 to operate by using the output end of the motor 1 23, so that the cooperation between the threaded rod 24 and the connecting block 22 can be used to drive the excavation structure 3 to rise and fall, so that planting pits of different depths can be excavated according to needs, and then the soil excavated by the auger 32 will be transported to the inner cavity of the slide plate 35 through the soil outlet 34;
[0050] When the housing 31 moves downward, the slide plate 35 is driven to move together, and then the slide plate 35 applies a force to the connecting plate 524, thereby driving the connecting plate 524 to slide in the inner cavity of the bottom plate 521, thereby driving the plurality of springs 523 to contract. When the housing 31 moves upward, the slide plate 35 is driven to move upward together, thereby releasing the force applied to the connecting plate 524, and then under the elastic force of the springs 523, the connecting plate 524 is driven to move upward in the inner cavity of the bottom plate 521;
[0051] Then, the soil and stones transported to the inner cavity of the slide plate 35 will roll through the inner cavity of the slide plate 35 to the inner cavity of the outer shell three 51, and then fall onto the stirring fan 532, thereby driving the stirring fan 532 to rotate in the inner cavity of the outer shell three 51, so as to stir the soil and stones in the inner cavity of the outer shell three 51, and prevent the soil and stones in the inner cavity of the outer shell three 51 from being too much, causing blockage. At the same time, the stirring of the stirring fan 532 can be used to allow the conveying structure 5 to transport the soil and stones to the inner cavity of the outer shell two 41 in a fixed amount, so as to prevent the rotor 43 from being blocked and stuck due to excessive soil and stones transported at one time. By running the motor three 42, the output end of the motor three 42 can be used to drive one of the rotors 43 to rotate, and then the mutual meshing of the two gears 44 will drive the other rotor 43 to rotate, so that the two rotors 43 and the outer shell two 41 cooperate with each other to crush the soil and stones transported to the inner cavity of the outer shell two 41, and then the crushed soil and pebbles will fall into the inner cavity of the funnel 6. The discharge of the funnel 6 can be controlled by the valve 7. When the planting pit excavated by the excavation structure 3 is planted with fruit trees, the soil and pebbles in the inner cavity of the funnel 6 can be filled back into the planting pit.
[0052] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.
Claims
1. A pit digging device for fruit tree planting, comprising a cart (1); characterized in that: A lifting structure (2) is fixedly connected to one side of the upper end of the cart (1), and a digging structure (3) is fixedly connected to one side of the lifting structure (2). A crushing structure (4) is fixedly connected to the middle part of the upper end of the cart (1), and the crushing structure (4) comprises a second shell (41), and two rotors (43) are rotatably connected to the inner cavity of the second shell (41). A motor (42) is fixedly connected to one side of the outer surface of the second shell (41), and the output end of the motor (42) passes through the outer surface of the second shell (41) and extends to the inner cavity of the second shell (41). The output end of the motor (42) is fixedly connected to one of the rotors (43), and the two rotors (43) are fixedly connected to one side of the motor (42), and the two gears (44) are meshed with each other. A conveying structure (5) is fixedly connected to the upper end of the second shell (41), and a funnel (6) is fixedly connected to the lower end of the second shell (41), and a valve (7) is fixedly connected to the lower part of the funnel (6).
2. A pit digging device for fruit tree planting according to claim 1, characterized in that: The excavation structure (3) comprises a shell one (31), the inner cavity of the shell one (31) is rotatably connected to an auger (32), the upper end of the shell one (31) is fixedly connected to a motor two (33), and the output end of the motor two (33) passes through the upper end of the shell one (31) and extends to the inner cavity of the shell one (31), the output end of the motor two (33) is fixedly connected to the upper end of the auger (32), and an excavation port (34) is provided on one side of the upper part of the shell one (31) close to the conveying structure (5), and a slide plate (35) is fixedly connected to the inner cavity of the excavation port (34).
3. A pit digging device for fruit tree planting according to claim 2, characterized in that: The lifting structure (2) comprises a support seat (21), the lower end of the support seat (21) is fixedly connected to the upper end of the trolley (1), the inner cavity of the support seat (21) is slidably connected to a connecting block (22), the inner cavity of the connecting block (22) is fixedly connected to the outer surface of the shell (31), the side of the connecting block (22) away from the shell (31) is threadedly connected to a threaded rod (24), the upper end of the support seat (21) is fixedly connected to a motor (23), and the output end of the motor (23) passes through the upper end of the support seat (21) and extends to the inner cavity of the support seat (21), the output end of the motor (23) is fixedly connected to the upper end of the threaded rod (24), the inner cavity of the support seat (21) is rotatably connected to the threaded rod (24), the inner cavity of the support seat (21) is fixedly connected to a guide rod (25), and the guide rod (25) is slidably connected to the connecting block (22).
4. A pit digging device for fruit tree planting according to claim 2, characterized in that: The conveying structure (5) comprises a third shell (51), the lower end of the third shell (51) is fixedly connected to the upper end of the second shell (41), a side of the third shell (51) close to the first shell (31) is fixedly connected to a support plate structure (52), and the middle part of the third shell (51) is rotatably connected to a stirring structure (53).
5. A pit digging device for fruit tree planting according to claim 4, characterized in that: The support plate structure (52) comprises a bottom plate (521), a plurality of limit rods (522) are fixedly connected to the inner cavity of the bottom plate (521), springs (523) are wound around the outer surfaces of the limit rods (522), a connecting plate (524) is slidably connected to the inner cavity of the bottom plate (521), and the connecting plate (524) is slidably connected to the plurality of limit rods (522).
6. A pit digging device for fruit tree planting according to claim 5, characterized in that: The slide plate (35) is arranged in an inclined manner, and the lower end of the slide plate (35) is tightly fitted with the upper end of the connecting plate (524).
7. The pit digging device for fruit tree planting according to claim 4, characterized in that: The stirring structure (53) comprises two connecting disks (531), the two connecting disks (531) are fixedly connected to the outer shell three (51), and the opposite surfaces of the two connecting disks (531) are rotatably connected to the stirring fan (532).
