Ground auger for seedling planting

Abstract

The utility model provides a ground drill for nursery stock planting. The ground drill is used for solving the problem that the diameter of a drill bit is inconvenient to adjust. A ground drill for seedling planting comprises a rack, a driving motor is fixed to the rack, a connecting rod is fixed to an output shaft of the driving motor, a conical drill bit is fixed to the bottom end of the connecting rod, a plurality of T-shaped sliding grooves are formed in the side wall of the drill bit in a circumferential array mode, the sliding grooves are connected with blades in a sliding mode through sliding blocks, and the cross section of each blade is in an arc shape. The top ends of the blades are fixedly connected with vertical pieces, the cross sections of the vertical pieces and the cross sections of the blades are the same, the ends, away from the sliding grooves, of the blades are digging edges, threaded holes are formed in the sliding blocks in a penetrating mode, bolts are connected into the threaded holes in a threaded mode, and the small ends of the bolts abut against the bottom ends of the sliding grooves. The position of the sliding block in the sliding groove is adjusted by rotating the bolt, the extending length of the blade can be rapidly and conveniently changed, and therefore the outer diameter of the drill bit is adjusted.

Description

Technical Field

[0001] This utility model relates to the field of drilling devices, and in particular to a ground drill for seedling planting. Background Technology

[0002] As a common gardening tool, the ground drill is widely used in various scenarios such as planting pits in sloping, sandy, and hard soil landscaping projects, digging holes for planting seedlings, digging holes for fencing stakes, digging holes for fertilizing fruit trees and forest trees, and cultivating and weeding in landscaping projects.

[0003] A Chinese utility model patent with application number 202323594431.9 discloses a seedling planting pit drilling device, including a frame. A movable plate is movably installed on one side of the frame, and a sleeve plate is fixedly installed on one side of the movable plate. A drive component is installed inside the movable plate and connected to a drill bit. The drill bit has a fixed diameter, making it impossible to flexibly adjust the hole size according to different planting needs. This makes it difficult to meet the diverse needs of planting seedlings of different sizes, affecting the planting effect and survival rate. Furthermore, the hole wall is prone to collapse after drilling, requiring secondary drilling. Utility Model Content

[0004] This utility model proposes a ground drill for seedling planting, which solves the problem that the drill bit diameter is not easy to adjust in the prior art.

[0005] The technical solution of this utility model is implemented as follows: A ground drill for seedling planting includes a frame, a drive motor fixed on the frame, a connecting rod fixed to the output shaft of the drive motor, a conical drill bit fixed to the bottom end of the connecting rod, multiple T-shaped grooves arranged in a circular array on the side wall of the drill bit, blades slidably connected to the grooves via sliders, the cross-section of the blades being arc-shaped, a vertical blade fixedly connected to the top of the blades, the cross-section of the vertical blades being the same as the cross-section of the blades, the end of the blades away from the grooves being a digging edge, a threaded hole passing through the slider, a bolt being screwed into the threaded hole, the small end of the bolt abutting against the bottom end of the groove.

[0006] Furthermore, the connecting rod is a helical rod with a sleeve rotating on its outer side. The sleeve has a discharge port on its top side wall and is fixedly connected to the frame. The large end of the drill bit has a conical recess, and the bottom end of the sleeve is connected to a conical feed plate via a connecting rod. Adjacent connecting rods, sleeves, and feed plates cooperate to form a feed inlet. The small end of the feed plate faces the same direction as the small end of the drill bit and is placed within the recess. The cooperation of the helical rod and sleeve not only drives the drill bit's digging operation but also utilizes its helical surface to transport the soil generated during drilling upwards, helping to promptly remove soil around the drill bit and reducing soil accumulation.

[0007] Furthermore, the blade has a serrated cutting edge. The drive motor is slidably connected to the connecting rod via a spline. A drive housing is rotatably connected to the output shaft and fixedly connected to the frame. A support base is fixed inside the drive housing, and a transmission rod rotates on the support base. The axis of the transmission rod is perpendicular to the axis of the connecting rod. A drive bevel gear is fixed to the side wall of the connecting rod. The transmission rod meshes with the drive bevel gear via a driven bevel gear. One end of the transmission rod outside the drive housing is connected to a driven rod via a crank-connecting rod. The end of the driven rod is fixedly connected to the side wall of the connecting rod. The transmission rod drives the connecting rod to reciprocate axially through the crank-connecting rod mechanism, causing the drill bit to generate an axial striking force during drilling, which can significantly improve drilling efficiency.

[0008] Furthermore, a collection box is fixed on the frame, and the discharge port of the sleeve is connected to the collection box. The collection box has an inclined discharge surface, and an opening is provided on the side wall of the collection box, which is connected to the bottom of the discharge surface. A baffle is provided at the opening to close it. The collection box effectively collects excess soil generated during drilling, preventing soil from scattering randomly and thus maintaining the cleanliness and order of the planting area.

[0009] Furthermore, the frame includes a platform plate, a drive motor fixed to the bottom surface of the platform plate, and telescopic rods fixed to the four corners of the bottom surface of the platform plate. The bottom ends of the telescopic rods are equipped with sets of movable wheels. By adjusting the length of the telescopic rods, the raising and lowering of the drill bit can be precisely controlled, ensuring that the drill bit can drill to a predetermined depth to meet different planting needs.

[0010] Furthermore, the platform is equipped with counterweights. During drilling, soil resistance or equipment sway may cause the equipment to shift or tilt. The counterweights effectively resist these external forces and maintain the stable operation of the equipment.

[0011] The beneficial effects of this technical solution are as follows: By adjusting the position of the slider within the groove using a rotating bolt, the extension length of the blades can be quickly and conveniently changed, thereby adjusting the outer diameter of the drill bit. The arc-shaped digging edge allows the drill bit to cut into the soil more effectively during rotational digging, further increasing drilling speed. The blades and vertical blades, during the drill bit's reverse rotation and removal, move some soil, helping to form a regular hole wall, reducing the risk of hole wall collapse. A regular hole wall and appropriate hole diameter promote better root development and growth in seedlings. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 A three-dimensional structural diagram of the connection between the drive motor and the drill bit;

[0015] Figure 3 This is a cross-sectional three-dimensional structural diagram of the present invention;

[0016] Figure 4 for Figure 3 A magnified schematic diagram of the local structure at point A;

[0017] Figure 5 for Figure 3 A magnified schematic diagram of the local structure at point B;

[0018] Figure 6 This is a schematic diagram of the exploded structure at the drill bit.

[0019] The components are: 1. Drive motor, 2. Connecting rod, 3. Drill bit, 4. Slide groove, 5. Slider, 6. Blade, 7. Bolt, 8. Sleeve, 9. Discharge port, 10. Recess, 11. Feed plate, 12. Feed port, 13. Spline, 14. Drive box, 15. Transmission rod, 16. Crank connecting rod, 17. Driven rod, 18. Collection box, 19. Discharge surface, 20. Opening, 21. Baffle, 22. Platform plate, 23. Telescopic rod, 24. Moving wheel set, 25. Counterweight, 26. Vertical plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figure 1-6As shown, this utility model provides a ground drill for seedling planting, including a frame, a drive motor 1 fixed on the frame, a connecting rod 2 fixed to the output shaft of the drive motor 1, a conical drill bit 3 fixed to the bottom end of the connecting rod 2, and multiple T-shaped grooves 4 arranged circumferentially on the side wall of the drill bit 3. A blade 6 is slidably connected to the groove 4 via a slider 5. The blade 6 has an arc-shaped cross-section, and a vertical plate 26 is fixedly connected to the top of the blade 6. The cross-section of the vertical plate 26 is the same as that of the blade 6. The end of the blade 6 away from the groove 4 is a digging edge. A threaded hole is provided on the slider 5, and a bolt 7 is screwed into the threaded hole. The small end of the bolt 7 abuts against the bottom end of the groove 4. The drive motor 1 can be an existing stepper motor or servo motor, etc.

[0022] Before use, place the equipment stably in the designated planting area. Adjust the relative position of bolt 7 in the groove 4 according to the required hole diameter for planting the seedlings. This will cause the blade 6 to slide along the groove 4, thus adjusting the outer diameter of the drill bit 3. If it is necessary to enlarge the diameter of the drill bit 3 to plant larger seedlings, bolt 7 can be unscrewed outwards, causing the slider 5 to drive the blade 6 to slide outwards along the groove 4, thereby increasing the outer diameter of the drill bit 3. This allows for quick adjustment of the drill bit 3 size according to different seedling planting needs, improving the equipment's versatility and applicability. Furthermore, after the blade 6 has been worn out from prolonged use, it can be removed via the slider 5 and replaced with a new blade 6, facilitating blade replacement. Start the drive motor 1. The motor output shaft drives the connecting rod 2 and the drill bit 3 to rotate. As the drill bit 3 rotates, the circumferential rotation of the arc-shaped blade 6 effectively cuts into the soil, achieving digging operations. At the same time, the conical drill bit 3 helps to easily penetrate the surface soil in the initial stage, reducing resistance during equipment startup and improving drilling efficiency. Once drill bit 3 reaches the predetermined depth, the drive motor 1 is reversed. Drill bit 3 is then slowly removed from the hole by the lifting device on the frame or manually. By controlling the reverse rotation of drive motor 1, the outer wall of the vertical plate 26 is used to smooth the hole wall, making it more regular and reducing the risk of collapse, thus providing a good planting environment for seedlings. After drilling, an appropriate amount of fertilizer or nutrient soil is filled into the hole, and then the seedling is planted. Backfilling and compaction are then performed as standard planting operations. The entire process is simple and efficient, and the equipment has a compact structure, making it easy to operate and maintain, effectively improving the efficiency and quality of seedling planting.

[0023] like Figure 2-5 As shown, the connecting rod 2 is a helical rod, and a sleeve 8 is rotatably connected to the outer side of the helical rod. The sleeve 8 has a discharge port 9 on the side wall at the top end. The sleeve 8 is fixedly connected to the frame. The large end of the drill bit 3 has a conical recess 10. The bottom end of the sleeve 8 is connected to a conical feed plate 11 through a connecting rod. The adjacent connecting rod, sleeve 8 and feed plate 11 cooperate to form a feed port 12. The small end of the feed plate 11 faces the same direction as the small end of the drill bit 3. The feed plate 11 is placed in the recess 10.

[0024] During drilling, the rotation of the auger not only drives the drill bit 3 to excavate, but also transports the soil generated during drilling upwards through its helical surface. The sleeve 8 on the outside of the auger is fixedly connected to the frame, providing stable support for the rotation of the auger without affecting soil transport. This helps to promptly discharge the soil generated during drilling, reducing soil accumulation around the drill bit 3, lowering equipment resistance, and improving drilling smoothness and efficiency. After drilling is completed, fertilizer, nutrient soil, or other required materials can be added to the sleeve 8 through the discharge port 9. The connecting rod 2 is driven in the opposite direction, and the rotation provided by the connecting rod 2 to the feed plate 11 allows the feed plate 11 to provide centrifugal force for the fertilizer and other materials, distributing them more evenly within the pit.

[0025] like Figure 1 , 2 As shown in Figures 5 and 6, the blade 6 has a serrated edge. The drive motor 1 is slidably connected to the connecting rod 2 via a spline 13. A drive housing 14 is rotatably connected to the output shaft. The drive housing 14 is fixedly connected to the frame. A support seat is fixed inside the drive housing 14. A transmission rod 15 is rotatably mounted on the support seat. The axis of the transmission rod 15 is perpendicular to the axis of the connecting rod 2. A drive bevel gear is fixed to the side wall of the connecting rod 2. The transmission rod 15 meshes with the drive bevel gear via a driven bevel gear. One end of the transmission rod 15 outside the drive housing 14 is connected to a driven rod 17 via a crank connecting rod 16. The end of the driven rod 17 is fixedly connected to the side wall of the connecting rod 2.

[0026] When the transmission rod 15 rotates, the crank-connecting rod 16 mechanism converts the rotational motion into the reciprocating linear motion of the driven rod 17, thereby driving the connecting rod 2 to reciprocate axially. This allows the drill bit 3 to generate an axial striking force during drilling, helping it to more easily break up the soil and roots, further improving drilling efficiency. By designing the cutting edge of the blade 6 as serrated, the blade 6 can more effectively cut into the soil during rotary digging, especially when facing harder soil or roots. The serrated cutting edge can easily cut through roots and hard soil clods, reducing resistance during digging and improving drilling efficiency. At the same time, the multi-point cutting action of the serrated cutting edge makes the excavated soil looser, facilitating subsequent soil transport.

[0027] like Figure 1 , 3 As shown in Figure 4, a collection box 18 is fixed on the frame. The discharge port 9 of the sleeve 8 is connected to the collection box 18. An inclined discharge surface 19 is provided inside the collection box 18. An opening 20 is provided on the side wall of the collection box 18. The opening 20 is connected to the bottom end of the discharge surface 19. A baffle 21 is provided at the opening 20. The baffle 21 can close the opening 20.

[0028] During drilling, the auger conveys soil upwards to the discharge port 9 of the sleeve 8, where it falls into the collection box 18 connected to the discharge port 9. The collection box 18 effectively collects excess soil generated during drilling, preventing soil from scattering and maintaining the cleanliness of the planting area. The collected soil can then be processed or reused, such as for backfilling the planting area, improving soil utilization and reducing resource waste. The collection box 18 has an inclined discharge surface 19. Soil falling onto the discharge surface 19 slides down the inclined surface to its bottom. When soil needs to be discharged, the baffle 21 is opened, and the soil is discharged from the opening 20 under its own weight. This allows for flexible control of the timing and amount of soil discharge according to actual needs, improving the flexibility and practicality of the equipment.

[0029] like Figure 1 , 2 As shown, the frame includes a platform plate 22, with a drive motor 1 fixed to the bottom surface of the platform plate 22. Telescopic rods 23 are fixed to the four corners of the bottom surface of the platform plate 22, and the bottom ends of the telescopic rods 23 are equipped with movable wheel sets 24. The telescopic rods 23 are existing hydraulic or pneumatic telescopic rods. The movable wheel sets 24 are existing technology. By adjusting the length of the telescopic rods 23, the platform plate 22 can be kept horizontal. The extension or retraction of the telescopic rods 23 can control the raising and lowering of the drill bit 3, ensuring that the drill bit 3 can drill to the predetermined depth. The equipment can be transferred to the next planting point by pushing the equipment with the movable wheel sets 24. This eliminates the need for multiple people to carry the equipment or use additional transportation tools, greatly saving labor and time costs.

[0030] like Figure 1 As shown, a counterweight 25 is provided on the platform plate 22. The installation position and number of the counterweight 25 can be adjusted according to actual needs. By adding the counterweight 25, the overall stability of the equipment can be improved, preventing displacement or tilting caused by soil resistance or equipment shaking during drilling. A larger counterweight can increase the downward pressure of the equipment, allowing the drill bit 3 to cut into the soil more stably, thereby improving drilling efficiency and quality.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A ground drill for seedling planting, comprising a frame, on which a drive motor (1) is fixed, characterized in that: The output shaft of the drive motor (1) is fixed with a connecting rod (2), and the bottom end of the connecting rod (2) is fixed with a conical drill bit (3). The side wall of the drill bit (3) has a circumferential array of multiple T-shaped grooves (4). The grooves (4) are slidably connected to blades (6) via sliders (5). The cross-section of the blades (6) is arc-shaped. The top of the blades (6) is fixedly connected to a vertical plate (26). The cross-section of the vertical plate (26) is the same as that of the blades (6). The end of the blades (6) away from the grooves (4) is a digging edge. The slider (5) is provided with a threaded hole, and a bolt (7) is screwed into the threaded hole. The small end of the bolt (7) abuts against the bottom end of the grooves (4).

2. The seedling planting drill according to claim 1, characterized in that: The connecting rod (2) is a screw rod, and a sleeve (8) rotates on the outside of the screw rod. The side wall at the top of the sleeve (8) is provided with a discharge port (9). The sleeve (8) is fixedly connected to the frame. The large end of the drill bit (3) is provided with a conical recess (10). The bottom end of the sleeve (8) is connected to a conical feed plate (11) through a connecting rod. The adjacent connecting rod cooperates with the sleeve (8) and the feed plate (11) to form a feed port (12). The small end of the feed plate (11) is oriented in the same direction as the small end of the drill bit (3). The feed plate (11) is placed in the recess (10).

3. The seedling planting drill according to claim 2, characterized in that: The blade (6) has a serrated edge. The drive motor (1) is slidably connected to the connecting rod (2) via a spline (13). A drive box (14) is rotatably connected to the output shaft. The drive box (14) is fixedly connected to the frame. A support seat is fixed inside the drive box (14). A transmission rod (15) is rotatably connected to the support seat. The axis of the transmission rod (15) is perpendicular to the axis of the connecting rod (2). A drive bevel gear is fixed to the side wall of the connecting rod (2). The transmission rod (15) meshes with the drive bevel gear via the driven bevel gear. One end of the transmission rod (15) outside the drive box (14) is connected to a driven rod (17) via a crank connecting rod (16). The end of the driven rod (17) is fixedly connected to the side wall of the connecting rod (2).

4. The seedling planting ground drill according to claim 2, characterized in that: A collection box (18) is fixed on the frame. The discharge port (9) of the sleeve (8) is connected to the collection box (18). An inclined discharge surface (19) is provided inside the collection box (18). An opening (20) is provided on the side wall of the collection box (18). The opening (20) is connected to the bottom end of the discharge surface (19). A baffle (21) is provided at the opening (20). The baffle (21) can close the opening (20).

5. A seedling planting drill as described in claim 1, characterized in that: The frame includes a platform plate (22), a drive motor (1) is fixed on the bottom surface of the platform plate (22), and telescopic rods (23) are fixed at the four corners of the bottom surface of the platform plate (22). The bottom end of the telescopic rods (23) is provided with a set of movable wheels (24).

6. The seedling planting ground drill according to claim 1, characterized in that: The platform plate (22) is equipped with a counterweight (25).

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