A planting hole digging device for plant cultivation

Abstract

The present application relates to the technical field of planting hole digging, in particular to a planting hole digging device for plant planting. The device comprises a basic push frame, the basic push frame comprises a mounting base frame and a side support roller, the mounting base frame is a metal frame, and the side support roller is arranged on one side of the mounting base frame. The driving motor and the adjustable hole digging rotating frame are controlled to move downward by the lifting control assembly. After the double-layer sliding spade and the digging spade rotate into the ground, the push rod driving connection sliding shaft can move downward in the hollow rotating shaft, and the lower spade of the double-layer sliding spade is extruded by the extrusion frame and the lower spade of the double-layer sliding spade at the bottom end of the connection sliding shaft, so that the lower spade of the double-layer sliding spade slides outward along the length direction of the upper spade, thereby increasing the digging radius of the double-layer sliding spade after entering the ground, and the rotated planting hole is narrow at the top and wide at the bottom, so that the water evaporation of the root system part can be reduced after the plant is planted in a part of arid areas.

Description

Technical Field

[0001] This invention relates to the field of planting hole excavation technology, and in particular to a planting hole excavation device for plant planting. Background Technology

[0002] Planting pits, also known as planting holes or tree pits, are dug around the designated planting point before planting seedlings. The size of the planting pit should be determined according to the size of the seedling.

[0003] When digging planting holes, it is important to ensure that the vertical surface of the planting hole is perpendicular to the bottom surface and that the top and bottom are the same size. Avoid forming a pot-shaped hole that is wider at the top and narrower at the bottom, otherwise the root system of the tree will be damaged when filling the soil in layers and tamping it down.

[0004] In order to improve the speed of digging planting holes, modern drilling machines are mostly used to drill planting holes. The planting holes drilled by these machines are mostly cylindrical with the same size from top to bottom. However, there are certain limitations to this type of drilling machine. Due to the limitation of the drilling column, it can only drill cylindrical planting holes. In some arid areas, in order to reduce water evaporation, the planting holes need to be dug into trapezoidal shapes with a smaller top and a larger bottom. In addition, after the loose soil is brought out by the rotary blade, it will accumulate at the edge of the planting hole. At this time, the planters need to step on the accumulated loose soil to plant, which is very inconvenient. Summary of the Invention

[0005] The purpose of this invention is to provide a planting hole digging device for plant cultivation, so as to solve the problem that traditional planting hole digging drills cannot dig trapezoidal holes that are smaller at the top and larger at the bottom according to the needs of arid areas, and that loose soil will accumulate at the edge of the planting hole after being carried out by the rotary blades.

[0006] To achieve the above objectives, the present invention provides a planting hole digging device for plant planting, including a base pusher frame, wherein the base pusher frame includes a mounting base frame and side support rollers, the mounting base frame is a metal frame, and the side support rollers are disposed on one side of the mounting base frame;

[0007] A lifting and digging mechanism includes a lifting control component, a drive motor, and an adjustable digging frame. The lifting control component is located at the end of the mounting base, and the drive motor is located at the lifting end of the lifting control component. The adjustable digging frame includes a digging drill frame and an adjustable base frame. The digging drill frame includes a hollow rotating shaft and digging blades. The end of the hollow rotating shaft is connected to the output end of the drive motor, and the digging blades are arranged around the outside of the hollow rotating shaft.

[0008] The adjustable base frame includes a double-layer sliding blade, an adjustment component, and a return spring. The double-layer sliding blade is fitted to the bottom of the digging blade. The adjustment component is mounted on a hollow rotating shaft, and the adjustment end of the adjustment component acts on the lower blade of the double-layer sliding blade. The return spring is mounted inside the hollow rotating shaft, and the return spring acts on the adjustment end of the adjustment component.

[0009] The linkage shielding mechanism includes a linkage squeezing rod, a guide crossbeam, and a shielding component. The guide crossbeam is located at the bottom of the mounting base. The shielding component is horizontally slidably mounted on the guide crossbeam and faces the excavating vane. One end of the linkage squeezing rod is rotatably connected to the shielding component, and the other end is rotatably connected to the lifting control assembly.

[0010] As a further improvement to this technical solution, the double-layer sliding shovel blade includes upper and lower shovel blades. The upper shovel blade is fixedly installed horizontally at the bottom of the digging blade, and a guide groove is provided on the upper shovel blade. The lower shovel blade is slidably installed below the upper shovel blade along the length of the upper shovel blade, and the lower shovel blade and the upper shovel blade are tightly fitted together. The control end of the control component passes through the guide groove and is connected to the lower shovel blade.

[0011] The upper and lower shovel blades each include a horizontal plate and an inclined shovel blade portion. The inclined shovel blade portion is away from the digging blade, and the lower shovel blade is also provided with a guide plate that fits against the bottom surface of the digging blade.

[0012] As a further improvement to this technical solution, the control component includes an extrusion frame, a connecting sliding shaft, and a control push rod. The output end of the control push rod is vertically downward and is located on one side of the end of the hollow rotating shaft. The connecting sliding shaft is slidably located inside the hollow rotating shaft, and the end of the connecting sliding shaft is connected to the output end of the control push rod. One end of the extrusion frame passes through the guide groove and is rotatably connected to the lower shovel blade, and the other end is rotatably connected to the bottom end of the connecting sliding shaft.

[0013] As a further improvement to this technical solution, the reset spring is located at the bottommost end of the inner side of the hollow rotating shaft, and the end of the reset spring abuts against the bottommost end of the connecting sliding shaft.

[0014] As a further improvement to this technical solution, the lifting control component includes a lifting slide, a drive cylinder, and a guide reset component. The guide reset component is vertically mounted on the vertical frame of the mounting base. The lifting slide is slidably mounted on the guide reset component. The drive motor is mounted on one side of the lifting slide and is located on the side of the mounting base away from the supporting roller. The drive cylinder is vertically mounted on the side of the mounting base away from the drive motor, and the output end of the drive cylinder acts on the side of the lifting slide away from the drive motor.

[0015] As a further improvement to this technical solution, the linkage compression rod includes a base rod, a sliding rod, and a extension spring. One end of the base rod is rotatably connected to the bottom end of the lifting slide, and the other end is provided with a slot. One end of the sliding rod is rotatably connected to a blocking component, and the other end is movably inserted into the slot of the base rod. The extension spring is disposed between the ends of the base rod and the sliding rod.

[0016] As a further improvement to this technical solution, a horizontal guide slot is provided on the guide crossbeam, and the blocking component includes a sliding frame and a blocking plate. The sliding frame is slidably installed in the guide slot of the guide crossbeam, and the blocking plate is disposed at the end of the sliding frame, and the sliding rod is rotatably connected to the blocking plate.

[0017] The shield is positioned directly opposite the excavation blade.

[0018] As a further improvement to this technical solution, the guide frame includes two parallel crossbeams, and each crossbeam is provided with a guide groove. The two ends of one side of the sliding frame are slidably disposed in the guide grooves of the two crossbeams, and the other side of the frame is fixedly connected to a baffle plate.

[0019] Compared with the prior art, the present invention provides a planting hole digging device for plant cultivation, which has the following beneficial effects:

[0020] This invention controls the downward movement of the drive motor and the adjustable digging frame through a lifting control component. After the double-layer sliding shovel blades and digging blades are screwed into the ground, the connecting sliding shaft can be driven to move downward inside the hollow rotating shaft by the adjustment push rod. The bottom end of the connecting sliding shaft squeezes the extrusion frame and the lower shovel blade of the double-layer sliding shovel blades, causing the lower shovel blade to slide outward along the length of the upper shovel blade. This increases the digging radius of the double-layer sliding shovel blades after entering the ground, making the planting hole narrower at the top and wider at the bottom. This can reduce water evaporation from the roots after planting in some arid areas.

[0021] In addition, when the lifting control component moves down, it can simultaneously drive the shielding component to move horizontally forward and close to one side of the excavating blade. When the excavating blade rotates to dig the planting hole, it forms a shield, thereby creating a space without loose soil on one side of the planting hole, which makes it convenient for subsequent workers to carry out planting work on this side. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective;

[0024] Figure 3 This is a schematic diagram of the overall structure of the mounting base frame after partial cross-section in this invention;

[0025] Figure 4 This is a cross-sectional view of the lifting slide, drive motor, and adjustable digging frame in this invention.

[0026] Figure 5 This is a structural distribution diagram of the lifting slide, drive motor, and adjustable digging frame in this invention;

[0027] Figure 6 for Figure 5 Enlarged view of the structure at point A in the middle;

[0028] Figure 7 for Figure 5 Enlarged view of the structure at point B in the middle;

[0029] Figure 8 This is a schematic diagram of the adjustable digging frame structure after the lower layer of the double-layer sliding shovel blade slides in this invention;

[0030] Figure 9 for Figure 8 Enlarged view of the structure at point C.

[0031] In the diagram: 1. Mounting base frame; 2. Side support rollers; 3. Lifting control assembly; 31. Lifting slide; 32. Drive cylinder; 33. Guide reset assembly; 4. Drive motor; 5. Adjustable digging swivel frame; 51. Digging drill frame; 511. Hollow rotating shaft; 512. Digging blade; 52. Adjustable base frame; 521. Double-layer sliding blade; 522. Reset spring; 6. Adjustment assembly; 61. Extrusion frame; 62. Connecting sliding shaft; 63. Adjustment push rod; 7. Linkage extrusion rod; 71. Base rod; 72. Sliding rod; 73. Extension spring; 8. Guide crossbeam; 9. Covering component; 91. Sliding frame; 92. Cover plate. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Reference Figure 1-9A planting hole digging device for plant cultivation is designed to dig planting holes that are narrow at the top and wide at the bottom to reduce water evaporation from plant roots, according to the needs of arid regions. At the same time, a shield is formed on one side of the planting hole to prevent the accumulation of loose soil and leave working space for planting personnel. The device includes a base pusher, a lifting and digging mechanism, and a linkage shielding mechanism. The base pusher includes a mounting base 1 and side support rollers 2. The mounting base 1 is a metal frame. The side support rollers 2 are located on one side of the mounting base 1. A handle is provided on one side of the mounting base 1, which allows the entire mounting base 1 to be tilted and supported by the side support rollers 2, so that the entire device can be moved by holding the handle.

[0034] The lifting and digging mechanism includes a lifting control component 3, a drive motor 4, and an adjustable digging frame 5. The lifting control component 3 is located at the end of the mounting base 1, and the drive motor 4 is located at the lifting end of the lifting control component 3. The adjustable digging frame 5 includes a digging drill frame 51 and an adjustable base frame 52. The digging drill frame 51 includes a hollow rotating shaft 511 and a digging blade 512. The end of the hollow rotating shaft 511 is connected to the output end of the drive motor 4, and the digging blade 512 is arranged around the outside of the hollow rotating shaft 511.

[0035] The adjustable base frame 52 includes a double-layer sliding blade 521, an adjustment component 6, and a return spring 522. The double-layer sliding blade 521 is set in contact with the bottom end of the digging blade 512. The adjustment component 6 is set on the hollow rotating shaft 511, and the adjustment end of the adjustment component 6 acts on the lower blade of the double-layer sliding blade 521. The return spring 522 is set on the inner side of the hollow rotating shaft 511, and the return spring 522 acts on the adjustment end of the adjustment component 6.

[0036] The linkage shielding mechanism includes a linkage squeezing rod 7, a guide crossbeam 8, and a shielding component 9. The guide crossbeam 8 is located at the bottom of the mounting base 1. The shielding component 9 is horizontally slidably mounted on the guide crossbeam 8, and the shielding component 9 faces the digging vane 512. One end of the linkage squeezing rod 7 is rotatably connected to the shielding component 9, and the other end is rotatably connected to the lifting control component 3. This allows the lifting control component 3 to simultaneously drive the shielding component 9 to move horizontally forward and closer to one side of the digging vane 512 when controlling the drive motor 4 and the adjustable digging vane 5 to move downward. When the digging vane 512 rotates to dig the planting hole, it forms a shield, thereby creating a space without loose soil on one side of the planting hole, which facilitates subsequent planting work on this side.

[0037] The double-layer sliding shovel blade 521 includes upper and lower shovel blades. The upper shovel blade is fixedly mounted horizontally at the bottom of the digging blade 512 and has a guide groove. The lower shovel blade is slidably mounted below the upper shovel blade along the length of the upper shovel blade and is tightly fitted with the upper shovel blade. The control end of the control component 6 passes through the guide groove and is connected to the lower shovel blade, so that the control component 6 can control the lower shovel blade to slide outward below the upper shovel blade.

[0038] The upper and lower shovel blades each include a horizontal plate and an inclined shovel blade. The inclined shovel blade is away from the digging blade 512, and the lower shovel blade is also provided with a guide plate that fits against the bottom surface of the digging blade 512, so that the double-layer sliding shovel blade 521 can scoop up the soil through the inclined shovel blade and guide it into the digging blade 512 and rotate it out.

[0039] The control assembly 6 includes an extrusion frame 61, a connecting sliding shaft 62, and a control push rod 63. The output end of the control push rod 63 is vertically downward and located on one side of the end of the hollow rotating shaft 511. The connecting sliding shaft 62 is slidably located inside the hollow rotating shaft 511, and its end is connected to the output end of the control push rod 63. One end of the extrusion frame 61 passes through the guide groove and is rotatably connected to the lower blade, while the other end is rotatably connected to the bottom end of the connecting sliding shaft 62. When the double-layer sliding blade 521 and the digging blade 5... After the 12 is screwed into the ground, the control rod 63 can be activated to drive the connecting sliding shaft 62 to move down inside the hollow rotating shaft 511. The bottom end of the connecting sliding shaft 62 squeezes the extrusion frame 61 and the lower shovel blade, causing the lower shovel blade to slide outward along the length of the upper shovel blade, thereby increasing the shoveling radius of the double-layer sliding shovel blade 521. After the double-layer sliding shovel blade 521 and the digging blade 512 are screwed into the ground, the increased shoveling radius of the double-layer sliding shovel blade 521 can make the planting hole that is screwed out appear narrow at the top and wide at the bottom.

[0040] The return spring 522 is located at the bottom of the inner side of the hollow rotating shaft 511, and the end of the return spring 522 abuts against the bottom of the connecting sliding shaft 62, so that the connecting sliding shaft 62 compresses the return spring 522 when it moves down. After the planting hole is completed, the control push rod 63 is closed. At this time, under the reverse elastic force of the return spring 522, the connecting sliding shaft 62 is driven to reset, so that the control push rod 63 can drive the connecting sliding shaft 62 to move down again.

[0041] The lifting control assembly 3 includes a lifting slide 31, a drive cylinder 32, and a guide and reset assembly 33. The guide and reset assembly 33 is vertically mounted on the vertical frame of the mounting base 1. The lifting slide 31 is slidably mounted on the guide and reset assembly 33. The drive motor 4 is mounted on one side of the lifting slide 31 and is located on the side of the mounting base 1 away from the side support roller 2. The drive cylinder 32 is vertically mounted on the side of the mounting base 1 away from the drive motor 4, and the output end of the drive cylinder 32 acts on the side of the lifting slide 31 away from the drive motor 4, so that the drive cylinder 32 can drive the lifting slide 31 to move up and down on the guide and reset assembly 33, thereby driving the drive motor 4 on the lifting slide 31 and the adjustable digging frame 5 to move down, and using the adjustable digging frame 5 to rotate and dig planting holes on the ground.

[0042] The linkage extrusion rod 7 includes a base rod 71, a sliding rod 72, and a extension spring 73. One end of the base rod 71 is rotatably connected to the bottom end of the lifting slide 31, and the other end has a slot. One end of the sliding rod 72 is rotatably connected to the blocking member 9, and the other end is movably inserted into the slot of the base rod 71. The extension spring 73 is set between the ends of the base rod 71 and the sliding rod 72, so that the entire linkage extrusion rod 7 can extend, retract, and return to its original state.

[0043] The guide crossbeam 8 has a horizontal guide slot. The shielding component 9 includes a sliding frame 91 and a shielding plate 92. The sliding frame 91 is slidably installed in the guide slot of the guide crossbeam 8. The shielding plate 92 is located at the end of the sliding frame 91, and the sliding rod 72 is rotatably connected to the shielding plate 92.

[0044] The baffle plate 92 is directly facing the digging blade 512. When the lifting slide 31 moves down, the sliding frame 91, guided by the guide crossbeam 8, can press the baffle plate 92 closer to the digging blade 512 through the linkage compression rod 7. After the digging blade 512 touches the digging blade 512, the lifting slide 31 continues to move down and compresses the linkage compression rod 7.

[0045] The guide frame 8 includes two parallel frames, and each of the two frames is provided with a guide groove. The two ends of one side of the sliding frame 91 are slidably set in the guide grooves of the two frames, and the other side of the frame is fixedly connected to the baffle plate 92. The guide grooves of the two frames guide the two ends of the sliding frame 91 so that when the sliding frame 91 and the baffle plate 92 move forward, the direction of forward movement is directly facing the excavation blade 512.

[0046] Working principle: First, push the entire device to the position where planting holes need to be dug, and level the mounting base 1. At this time, the hollow rotating shaft 511 and the digging blade 512 are perpendicular to the ground. Start the drive motor 4 to drive the hollow rotating shaft 511 and the digging blade 512 to rotate. Then start the drive cylinder 32 to drive the lifting slide 31 to move down along the vertical frame of the mounting base 1 under the guidance of the guide and reset component 33. This will drive the drive motor 4 and the adjustable digging frame 5 on the lifting slide 31 to move down. When the hollow rotating shaft 511 and the digging blade 512 move down while rotating, they will rotate and dig directly on the ground. When the digging blade 512 is screwed into the ground, the double-layer sliding shovel 521 is also screwed into the ground at the bottom of the digging blade 512. At this time, start the control push rod 63 to drive the connecting sliding shaft 62 to move down inside the hollow rotating shaft 511. The bottom of the connecting sliding shaft 62 will press the compression frame 61 and the lower shovel of the double-layer sliding shovel 521. The double-layer sliding shovel blade 521 slides outward along the length of the upper blade, thereby increasing the shoveling radius of the double-layer sliding shovel blade 521. During the downward rotation of the double-layer sliding shovel blade 521 and the digging blade 512, the increased shoveling radius of the double-layer sliding shovel blade 521 allows the planted holes to be narrower at the top and wider at the bottom. In addition, as the lifting slide 31 moves downward, it will press the cover plate 92 through the linkage compression rod 7. At this time, the sliding frame 91 and the cover plate 92 will move towards the digging blade 512 under the guidance of the guide crossbeam 8. When the cover plate 92 is attached to the outside of the digging blade 512, the lifting slide 31 continues to descend, pressing the linkage compression rod 7 to shorten it, so that the cover plate 92 is tightly attached to one side of the digging blade 512, thus forming a cover on one side of the digging blade 512. At this time, when the digging blade 512 brings out loose soil, it will not accumulate on this side, thus leaving space for the planting personnel to work.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A planting hole digging device for plant cultivation, characterized in that, include: The base pusher includes a mounting base (1) and side support rollers (2). The mounting base (1) is a metal frame, and the side support rollers (2) are located on one side of the mounting base (1). The lifting and digging mechanism includes a lifting control component (3), a drive motor (4), and an adjustable digging frame (5). The lifting control component (3) is located at the end of the mounting base (1), and the drive motor (4) is located at the lifting end of the lifting control component (3). The adjustable digging frame (5) includes a digging drill frame (51) and an adjustable base frame (52). The digging drill frame (51) includes a hollow rotating shaft (511) and a digging blade (512). The end of the hollow rotating shaft (511) is connected to the output end of the drive motor (4), and the digging blade (512) is arranged around the outside of the hollow rotating shaft (511). The adjustable base frame (52) includes a double-layer sliding blade (521), an adjustment component (6), and a return spring (522). The double-layer sliding blade (521) is attached to the bottom of the digging blade (512). The adjustment component (6) is set on the hollow rotating shaft (511), and the adjustment end of the adjustment component (6) acts on the lower blade of the double-layer sliding blade (521). The return spring (522) is set inside the hollow rotating shaft (511), and the return spring (522) acts on the adjustment end of the adjustment component (6). The linkage shielding mechanism includes a linkage squeezing rod (7), a guide crossbeam (8), and a shielding component (9). The guide crossbeam (8) is located at the bottom of the mounting base (1). The shielding component (9) is slidably mounted on the guide crossbeam (8) in the horizontal direction, and the shielding component (9) faces the excavation blade (512). One end of the linkage squeezing rod (7) is rotatably connected to the shielding component (9), and the other end is rotatably connected to the lifting control assembly (3).

2. The planting hole digging device for plant cultivation according to claim 1, wherein The double-layer sliding shovel (521) includes two layers of shovels, an upper shovel fixedly disposed horizontally at the bottom of the digging blade (512), and a guide groove is provided on the upper shovel. The lower shovel is slidably installed below the upper shovel along the length of the upper shovel, and the lower shovel is tightly fitted with the upper shovel. The control end of the control component (6) passes through the guide groove and is connected to the lower shovel. The upper and lower shovel blades each include a horizontal plate and an inclined shovel blade portion. The inclined shovel blade portion is far away from the digging blade (512), and the lower shovel blade is also provided with a guide plate that fits against the bottom surface of the digging blade (512).

3. The planting hole digging device for plant cultivation according to claim 2, wherein The control component (6) includes an extrusion frame (61), a connecting sliding shaft (62), and a control push rod (63). The output end of the control push rod (63) is vertically downward and is located on one side of the end of the hollow rotating shaft (511). The connecting sliding shaft (62) is slidably located inside the hollow rotating shaft (511), and the end of the connecting sliding shaft (62) is connected to the output end of the control push rod (63). One end of the extrusion frame (61) passes through the guide groove and is rotatably connected to the lower shovel blade, and the other end is rotatably connected to the bottom end of the connecting sliding shaft (62).

4. The planting hole digging device for plant cultivation according to claim 3, wherein The reset spring (522) is arranged at the bottom end inside the hollow rotating shaft (511), and the end of the reset spring (522) abuts against the bottom end of the connecting sliding shaft (62).

5. The planting hole digging device for plant cultivation according to claim 1, wherein The lifting control assembly (3) comprises a lifting sliding table (31), a driving cylinder (32) and a guiding reset assembly (33), the guiding reset assembly (33) is arranged vertically on the vertical frame body of the mounting base frame (1), the lifting sliding table (31) is slidingly arranged on the guiding reset assembly (33), the driving motor (4) is arranged on one side of the lifting sliding table (31), and the driving motor (4) is located on the side, away from the side support roller (2), of the mounting base frame (1), and the driving cylinder (32) is arranged vertically on the side, away from the driving motor (4), of the mounting base frame (1), and the output end of the driving cylinder (32) acts on the side, away from the driving motor (4), of the lifting sliding table (31).

6. The planting hole digging device for plant cultivation according to claim 5, wherein The linkage extrusion rod (7) comprises a base rod (71), a sliding rod (72) and an extension spring (73), one end of the base rod (71) is rotatably connected to the bottom end of the lifting sliding table (31), and the other end is provided with a slot, one end of the sliding rod (72) is rotatably connected to the shielding piece (9), and the other end is movably inserted into the slot of the base rod (71), and the extension spring (73) is arranged between the base rod (71) and the end of the sliding rod (72).

7. The planting hole digging device for plant cultivation according to claim 6, wherein The guiding cross frame (8) is provided with a horizontal guiding long slot, the shielding piece (9) comprises a sliding frame (91) and a shielding plate (92), the sliding frame (91) is slidingly arranged in the guiding long slot of the guiding cross frame (8), and the shielding plate (92) is arranged at the end of the sliding frame (91). The shielding plate (92) faces the digging rotating piece (512).

8. The planting hole digging device for plant cultivation according to claim 7, wherein The guiding cross frame (8) comprises two parallel cross frames, and the two cross frames are provided with guiding long slots, and the two ends of the side frame body of the sliding frame (91) are slidingly arranged in the guiding long slots of the two cross frames, and the other side frame body is fixedly connected with the shielding plate (92). The shielding plate (92) faces the digging rotating piece (512).

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