Depth-adjustable forestry seedling planting device

Abstract

The utility model belongs to the technical field of nursery stock planting, particularly relates to a depth-adjustable forestry nursery stock planting device, and aims to solve the problems that the hole digging depth of an existing device is inconvenient to adjust, and the operation efficiency is low due to separation of hole digging and backfilling procedures, the forestry nursery stock planting device comprises a depth adjusting hole digging assembly and a soil backfilling assembly, hole digging operation of different depths can be achieved through the arranged depth adjusting hole digging assembly, dug soil can be conveyed into a previous hole position for backfilling through the arranged soil backfilling assembly, and automatic operation of digging and filling at the same time is formed. The soil backfilling assembly is arranged, so that soil excavated from the current hole site is not an obstacle accumulated on the pit edge any more, but is converted into a resource used for backfilling the previous hole site; original discrete operation steps are fused into a continuous dynamic process, so that the planting efficiency is greatly improved, manual dependence is reduced, and the cleanliness of an operation site is kept.

Description

TECHNICAL FIELD

[0001] The utility model relates to a seedling planting device, in particular to a forestry seedling planting device with adjustable depth, belongs to seedling planting technical field. BACKGROUND

[0002] In the forestry afforestation, landscaping and ecological restoration engineering, seedling planting is a basic and heavy operation link. The traditional planting method mainly relies on manual use of shovel, pick head and other simple tools to dig holes, put seedlings and backfill, which has problems of high labor intensity, low efficiency, inconsistent planting depth, etc., which seriously affects the survival rate and consistency of later growth of seedlings.

[0003] To improve efficiency, a variety of forestry hole digging machines appear in the market, but these devices have single function and cannot realize automatic integration of hole digging and backfilling. In the prior art, for example, the forestry seedling transplanting device disclosed in the announcement No. CN213369103U realizes the transportation and righting of seedlings through the hydraulic telescopic cylinder and the lifting mechanism, which reduces the labor intensity of manual seedling supporting, but its function focuses on the transfer and positioning of seedlings and does not involve the hole digging operation itself, nor can it realize the backfilling of soil. The dug soil is still piled up beside the hole and needs additional process. For another example, the novel forestry seedling transplanting device disclosed in the announcement No. CN211458290U focuses on the soil conservation and clamping fixation in the seedling transportation process, and maintains soil humidity and prevents seedling from toppling through the water tank, capillary effect of hemp rope and clamping assembly, but its core is the moisture retention and transportation stability of seedlings, which also does not solve the problems of hole digging and subsequent soil backfilling. In addition, some devices with higher automation degree, such as "automatic circulation type hole digging and planting integrated machine", although they integrate hole digging, seedling feeding, soil cultivation and watering functions, but their structure is complex, for example, they use three-leaf claw lifting type hole digging mechanism, rotating wheel disc seedling feeding mechanism and soil cultivation mechanism. This design of multiple mechanism cooperation operation leads to high cost of the whole machine, which is not conducive to large-scale promotion and application in conventional forestry production, and the hole digging mechanism lacks effective design for soil collection and directional transportation, and it is difficult to realize accurate backfilling of the soil at the current hole site to the previous hole site.

[0004] In summary, the existing forestry planting devices have two outstanding defects: first, the hole digging depth is not easy to adjust or the adjustment range is limited, and it mainly depends on mechanical limiting or simple hydraulic stroke control, which is difficult to meet the accurate and diverse requirements of different seedling varieties for planting depth; second, the function is single or the integration degree is low, and the hole digging and backfilling links are seriously disconnected, generally forming an operation mode of "digging a hole and piling up a pile of soil", which not only increases the process and time cost of subsequent backfilling, leading to low overall operation efficiency, but also occupies the operation space of the soil piled up beside the hole, affecting the seedling planting operation, and may cause soil loss and water resource waste. SUMMARY

[0005] The utility model discloses to solve the problem of inconvenient hole digging depth adjustment of the existing device and low operation efficiency caused by separation of hole digging and backfilling process and provides a forestry nursery stock planting device with adjustable depth.

[0006] The utility model discloses a forestry nursery stock planting device with adjustable depth through the following technical scheme to realize above-mentioned purpose: forestry nursery stock planting device with adjustable depth, including bottom plate, depth adjustment hole digging assembly and soil backfilling assembly, depth adjustment hole digging assembly and soil backfilling assembly all are connected on the bottom plate, and the soil that depth adjustment hole digging assembly dug is transported to soil backfilling assembly, and soil backfilling assembly is provided with fixed conveying section and extension conveying section;

[0007] Depth adjustment hole digging assembly includes hole digging auger and hole digging slide rail, and the hole digging slide rail is arranged at one side of the hole digging auger, and the depth adjustment seat is movably connected on the hole digging slide rail, and the plate body of the bottom plate is connected with the soil collecting cover, and the hole digging auger is vertically inserted in the soil collecting cover.

[0008] The fixed conveying section of soil backfilling assembly includes fixed conveying pipe, and the pipe body of the fixed conveying pipe is communicated at one side of the cover body of the soil collecting cover, and the first conveying shaft is rotatably connected in the fixed conveying pipe, and the first spiral conveying blade is fixedly connected on the shaft body of the first conveying shaft, and the extension conveying section of soil backfilling assembly includes extension conveying groove, and the second conveying shaft is rotatably connected in the extension conveying groove, and the second spiral conveying blade is fixedly connected on the shaft body of the second conveying shaft, and the transmission belt is connected between the first conveying shaft and the second conveying shaft.

[0009] As a further scheme of the utility model: the lower plate surface of the bottom plate is connected with the roller at four corners, the upper plate surface of the bottom plate is fixedly connected with the nursery stock frame and the support frame, and the storage battery and the control cabinet are fixedly connected on the support frame and arranged side by side, the storage battery is electrically connected with each electrical element, and the control cabinet is signal connected with each electrical element.

[0010] As a further scheme of the utility model: the hole digging auger of depth adjustment hole digging assembly is connected with the hole digging motor, the limit sliding block is movably clamped in the sliding groove of the hole digging slide rail, and the driving connecting rod is connected between the limit sliding block and the machine body of the hole digging motor.

[0011] As a further scheme of the utility model: the bottom end of the hole digging slide rail is fixedly connected on the bottom plate, the threaded rotating rod is rotatably connected in the hole digging slide rail, the threaded rotating rod is screwed through the limit sliding block, the driving motor is fixedly connected on the upper end of the hole digging slide rail, and the motor shaft of the driving motor is coaxially fixedly connected with the threaded rotating rod.

[0012] As a further scheme of the utility model: the sliding groove of the hole digging sliding rail is further movably provided with a limiting block, the limiting block is movably sleeved on the rod body of the threaded rotating rod, the limiting block is fixedly connected with the depth adjusting seat, the depth adjusting seat is in U shape, the depth adjusting seat is clamped on the two side outer walls of the hole digging sliding rail, one side of the depth adjusting seat is fixedly connected with a positioning knob in a threaded mode, the one side outer wall of the hole digging sliding rail is provided with scale lines, the upper surface of the limiting block is fixedly connected with a lower limit switch, and the sliding groove top wall of the hole digging sliding rail is connected with an upper limit switch.

[0013] As a further scheme of the utility model: the outer side of the cover body of the soil collecting cover under the bottom plate is sleeved with a movable sleeve pipe, the outer wall of the movable sleeve pipe is fixedly connected with an electric telescopic rod, and the movable front end of the electric telescopic rod is fixedly connected to the lower plate surface of the bottom plate.

[0014] As a further scheme of the utility model: the fixed conveying pipe of the soil backfilling assembly is fixedly connected to the upper plate surface of the bottom plate, the conveying end of the fixed conveying pipe is communicated with a soil transferring pipe, the extension conveying groove is movably arranged directly below the fixed conveying pipe, the bottom end pipe opening of the soil transferring pipe is inserted into the extension conveying groove, the conveying end of the extension conveying groove is connected with a backfilling flow guide groove arranged in a downward inclined mode, and the backfilling flow guide groove is aligned with the previous planting hole position.

[0015] As a further scheme of the utility model: the two side edges of the extension conveying groove are fixedly connected with limiting sliding strips, the lower plate surface of the bottom plate is fixedly connected with a limiting sliding seat, and the limiting sliding strips are clamped on the limiting sliding seat.

[0016] As a further scheme of the utility model: one end of the fixed conveying pipe is provided with a conveying motor, the machine body of the conveying motor is fixedly connected to the upper plate surface of the bottom plate, the motor shaft of the conveying motor is fixedly connected with the first conveying shaft in a coaxial mode, the shaft body of the first conveying shaft fixedly sleeved outside the fixed conveying pipe is fixedly sleeved with a driving pulley, the shaft body of the second conveying shaft is movably inserted with a square inner rod, the rod body of the square inner rod fixedly sleeved outside the extension conveying groove is fixedly sleeved with a driven pulley, the driving pulley and the driven pulley are connected with a transmission belt, and the transmission belt movably penetrates through the bottom plate.

[0017] As a further scheme of the utility model: the shaft of the second conveying shaft is provided with a square channel, the square inner rod is movably inserted into the square channel, the rod body of the square inner rod fixedly sleeved outside the extension conveying groove is further fixedly sleeved with a positioning bearing, and the outer ring of the positioning bearing is fixedly connected with a positioning connecting rod between the bottom plate.

[0018] The utility model discloses the beneficial effect is:

[0019] 1. This utility model is equipped with an adjustable-depth excavation component and a soil backfilling component, both of which are connected to a base plate. The soil excavated by the adjustable-depth excavation component is transported to the soil backfilling component. The soil backfilling component is equipped with a fixed conveying section and an extended conveying section. The adjustable-depth excavation component enables excavation operations at different depths, and the soil backfilling component enables the excavated soil to be transported to the previous hole for backfilling, forming an automated operation of excavation and backfilling simultaneously. Furthermore, the soil backfilling component is equipped with a fixed conveying section and an extended conveying section, which means that the distance of soil backfilling can be appropriately adjusted according to the distance between two excavated holes to meet different planting needs. This ensures that the soil excavated at the current hole is no longer an obstacle piled up at the edge of the pit, but is transformed into a resource for backfilling the previous hole. The originally discrete operation steps are integrated into a continuous dynamic process, thereby greatly improving planting efficiency, reducing reliance on manual labor, and maintaining the cleanliness of the work site.

[0020] 2. The adjustable-depth drilling assembly of this utility model includes a drilling auger and a drilling slide rail. The drilling slide rail is located on one side of the drilling auger, and a depth adjustment seat is movably connected to the drilling slide rail. A soil collection cover is connected through the bottom plate. The drilling auger is vertically inserted into the soil collection cover. The movable connection of the depth adjustment seat to the drilling slide rail ensures that the drilling depth is adjustable, allowing for the selection of appropriate hole depths to meet the planting needs of different types of tree seedlings. Simultaneously, the soil collection cover, penetrating the bottom plate and accommodating the drilling auger, ensures that the excavated soil can be effectively collected for transport and backfilling by the soil backfilling assembly.

[0021] 3. The fixed conveying section of the soil backfilling component of this utility model includes a fixed conveying pipe, the body of which is connected to one side of the soil collection cover. A first conveying shaft is rotatably connected inside the fixed conveying pipe, and a first spiral conveying blade is fixedly connected to the shaft of the first conveying shaft. The extended conveying section of the soil backfilling component includes an extended conveying trough, in which a second conveying shaft is rotatably connected. A second spiral conveying blade is fixedly connected to the shaft of the second conveying shaft. A transmission belt connects the first and second conveying shafts. The fixed conveying pipe is connected to the soil collection cover, ensuring the starting point of soil conveying. The extended conveying section is composed of an extended conveying trough with a built-in second conveying shaft and second spiral conveying blade, and is connected to the first and second conveying shafts by a transmission belt, realizing effective power transmission and synchronous conveying. This ensures that the soil can be stably conveyed to a greater distance even in the extended state. The two spiral conveying blades can rotate synchronously, ensuring seamless and stable soil transmission throughout the variable-length channel, avoiding material blockage or accumulation. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the cross-sectional structure of the soil collection cover of this utility model;

[0024] Figure 3 This is a schematic diagram of the hole-cutting slide rail structure of this utility model;

[0025] Figure 4 This is a schematic diagram of the disassembled structure of the perforated slide rail of this utility model;

[0026] Figure 5 This is a schematic diagram of the soil backfill component structure of this utility model;

[0027] Figure 6 This utility model Figure 5 Schematic diagram of the structure at point A in the middle;

[0028] Figure 7 This is a schematic diagram of the connection structure between the second conveying shaft and the square inner rod of this utility model;

[0029] Figure 8 This is a side view of the adjustable-depth excavation hole assembly and soil backfill assembly of this utility model;

[0030] Figure 9 This is a schematic diagram of the connection structure between the base plate and the limiting slide of this utility model.

[0031] In the diagram: 1. Base plate; 11. Roller; 12. Seedling frame; 13. Support frame; 14. Battery; 15. Control cabinet; 2. Depth adjustment drilling assembly; 21. Drilling auger; 22. Drilling motor; 23. Soil collection cover; 24. Drilling slide rail; 25. Limit slider; 26. Drive linkage; 27. Depth adjustment seat; 28. Movable sleeve; 29. ​​Electric telescopic rod; 210. Drive motor; 211. Limit stop; 212. Lower limit switch; 213. Upper limit switch; 214. Threaded rotating rod; 215. Positioning knob; 21 6. Scale line; 3. Soil backfilling assembly; 31. Fixed conveying pipe; 32. Extended conveying trough; 33. Backfilling guide trough; 34. Soil transfer pipe; 35. First conveying shaft; 36. First spiral conveying blade; 37. Second conveying shaft; 38. Second spiral conveying blade; 39. Conveying motor; 310. Driving wheel; 311. Driven wheel; 312. Drive belt; 313. Positioning bearing; 314. Positioning link; 315. Square inner rod; 316. Square channel; 317. Limiting slide bar; 318. Limiting slide seat. Detailed Implementation

[0032] 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.

[0033] Example 1

[0034] like Figures 1 to 9 As shown, an adjustable-depth forestry seedling planting device includes a base plate 1, an adjustable-depth excavation component 2, and a soil backfilling component 3. Both the adjustable-depth excavation component 2 and the soil backfilling component 3 are connected to the base plate 1. The soil excavated by the adjustable-depth excavation component 2 is transported to the soil backfilling component 3. The soil backfilling component 3 is equipped with a fixed conveying section and an extended conveying section. The adjustable-depth excavation component 2 can achieve excavation operations at different depths, and the soil backfilling component 3 can transport the excavated soil to the previous hole for backfilling, forming an automated operation of excavation and backfilling simultaneously. Furthermore, the soil backfilling component 3 is equipped with a fixed conveying section and an extended conveying section, which means that the distance of soil backfilling can be appropriately adjusted according to the distance between the two excavated holes to meet different planting needs. This ensures that the soil excavated at the current hole is no longer an obstacle piled up at the edge of the pit, but is transformed into a resource for backfilling the previous hole. The originally discrete operation steps are integrated into a continuous dynamic process, thereby greatly improving planting efficiency, reducing reliance on manual labor, and maintaining the cleanliness of the work site.

[0035] The depth-adjustable hole-drilling assembly 2 includes a auger drill 21 and a hole-drilling slide rail 24. The slide rail 24 is located on one side of the auger drill 21, and a depth adjustment seat 27 is movably connected to the slide rail 24. A soil collection cover 23 is connected through the body of the base plate 1. The auger drill 21 is vertically inserted into the soil collection cover 23. The movable connection of the depth adjustment seat 27 to the slide rail 24 ensures that the hole depth is adjustable, allowing for the selection of hole positions of appropriate depths to meet the planting needs of different types of tree seedlings. At the same time, the soil collection cover 23, which penetrates the base plate 1 and accommodates the auger drill 21, ensures that the excavated soil can be effectively collected for transport and backfilling by the soil backfilling assembly 3.

[0036] The fixed conveying section of the soil backfilling component 3 includes a fixed conveying pipe 31, the pipe body of which is connected to one side of the soil collection cover 23. A first conveying shaft 35 is rotatably connected inside the fixed conveying pipe 31, and a first spiral conveying blade 36 is fixedly connected to the shaft of the first conveying shaft 35. The extended conveying section of the soil backfilling component 3 includes an extended conveying trough 32, a second conveying shaft 37 is rotatably connected inside the extended conveying trough 32, and a second spiral conveying blade 38 is fixedly connected to the shaft of the second conveying shaft 37. A drive belt 3 is connected between the first conveying shaft 35 and the second conveying shaft 37. 12. The fixed conveying pipe 31 is connected to the soil collection cover 23, ensuring the starting point of soil conveying; while the extended conveying section is composed of an extended conveying trough 32 with a built-in second conveying shaft 37 and a second spiral conveying blade 38, and is connected to the first conveying shaft 35 and the second conveying shaft 37 through a transmission belt 312, realizing the effective transmission of power and synchronous conveying, ensuring that the soil can be stably conveyed to a longer distance even in the extended state. The two spiral conveying blades can maintain synchronous rotation, ensuring that the soil is seamlessly and stably transported in the entire variable length channel, avoiding material blockage or accumulation.

[0037] Example 2

[0038] Improvements based on Example 1:

[0039] like Figure 1 As shown, rollers 11 are connected to the four corners of the lower surface of the base plate 1. A seedling frame 12 and a support frame 13 are fixedly connected to the upper surface of the base plate 1. A battery 14 and a control cabinet 15, arranged side-by-side, are fixedly connected to the support frame 13. The battery 14 is electrically connected to each electrical component, and the control cabinet 15 is signal-connected to each electrical component. The rollers 11 allow the device to be easily pulled or pushed to different work locations, adapting to the complex terrain that may exist in forestry planting sites. The seedling frame 12 can be used to store planted seedlings, allowing operators to easily move the seedlings. The device moves together and takes seedlings nearby, realizing a close connection between the processes of digging holes, taking seedlings, and backfilling. The storage battery 14 serves as a power source, providing a stable power supply to all electrical components in the device. The control cabinet 15 facilitates centralized control and status monitoring of the device by operators. It should be noted that the control cabinet 15 can be the control box involved in a mobile fruit tree planting device disclosed in announcement number CN111096208A. The control box is equipped with multiple control switches, which are connected to the power supply inside the electrical box and all controllable electromechanical equipment.

[0040] like Figures 1 to 4As shown, the upper end of the auger drill 21 of the depth-adjusting hole-drilling assembly 2 is connected to a hole-drilling motor 22. A limit slider 25 is movably locked in the groove of the hole-drilling slide rail 24. A drive link 26 is connected between the limit slider 25 and the body of the hole-drilling motor 22. The hole-drilling motor 22 directly drives the auger drill 21 to rotate, thereby efficiently completing the drilling and hole-drilling operation. At the same time, the limit slider 25 is movably locked in the groove of the hole-drilling slide rail 24, and a drive link 26 is connected between the limit slider 25 and the body of the hole-drilling motor 22. The hole-drilling motor 22 and the auger drill 21 can be suspended on the limit slider 25 by the drive link 26. When the limit slider 25 moves up and down in the groove of the hole-drilling slide rail 24, the auger drill 21 can be driven to rise and fall synchronously through the transmission of the drive link 26, thereby realizing the adjustment of the hole-drilling depth.

[0041] Furthermore, the bottom end of the drilling slide rail 24 is fixedly connected to the base plate 1. A threaded rotating rod 214 is rotatably connected inside the drilling slide rail 24. The threaded rotating rod 214 is threaded through the limiting slider 25. A drive motor 210 is fixedly connected to the upper end of the drilling slide rail 24. The motor shaft of the drive motor 210 is coaxially fixedly connected to the threaded rotating rod 214. As a power source, the drive motor 210 can directly and accurately control the forward and reverse rotation and rotation angle of the threaded rotating rod 214, thereby realizing the fast, accurate and labor-saving adjustment of the drilling depth, avoiding the tediousness and inaccuracy of manual adjustment.

[0042] Furthermore, a limit stop 211 is movably installed in the groove of the drilling slide rail 24. The limit stop 211 is movably sleeved on the rod body of the threaded rotating rod 214. The limit stop 211 is fixedly connected to the depth adjustment seat 27. The depth adjustment seat 27 is U-shaped and is fitted onto the outer walls of both sides of the drilling slide rail 24. A positioning knob 215 is threaded through one side of the depth adjustment seat 27. A scale line 216 is opened on one side of the outer wall of the drilling slide rail 24. A lower limit switch 212 is fixedly connected to the upper surface of the limit stop 211. An upper limit switch 213 is connected to the top wall of the groove of the drilling slide rail 24. The hole-digging slide rail 24 can be manually slid along it and fixed to one side of its outer wall by the positioning knob 215, thereby setting a mechanical stop. The scale line 216 precisely sets the position of the depth adjustment seat 27, thereby accurately preset the hole-digging depth or raise the upper limit, which greatly enhances the accuracy of depth control. When the limit slider 25 descends and touches the upper limit switch 213, it automatically stops to prevent the hole-digging auger 21 from drilling too far and damaging the mechanism or hitting hard objects. When the limit slider 25 rises under the drive of the threaded rotating rod 214 and touches the lower limit switch 212, the hole-digging mechanism stops rising to prevent excessive lifting and collision with the top wall of the groove of the hole-digging slide rail 24.

[0043] Furthermore, a movable sleeve 28 is fitted on the outer side of the soil collection cover 23 located below the base plate 1. An electric telescopic rod 29 is fixedly connected to the outer wall of the movable sleeve 28. The movable front end of the electric telescopic rod 29 is fixedly connected to the lower plate surface of the base plate 1. The movable sleeve 28 can slide up and down along the cover of the soil collection cover 23 under the drive of the electric telescopic rod 29. When the drilling auger 21 starts working, the electric telescopic rod 29 can push the movable sleeve 28 downward to make it more closely contact or press into the ground, which can more effectively surround the drilling area and prevent soil from splashing around under the high-speed rotation of the drill bit, thus improving the soil collection efficiency and ensuring that more soil is sent into the soil backfill component 3. In the non-working state or during transportation, the movable sleeve 28 can be retracted to reduce the overall volume of the structure and the ground clearance, making it easy to move.

[0044] like Figure 1 , Figures 5 to 9 As shown, the fixed conveying pipe 31 of the soil backfilling component 3 is fixedly connected to the upper surface of the base plate 1. The conveying end of the fixed conveying pipe 31 is connected to a soil transfer pipe 34. The extended conveying trough 32 is movably arranged directly below the fixed conveying pipe 31, and the bottom end of the soil transfer pipe 34 is inserted into the extended conveying trough 32. The conveying end of the extended conveying trough 32 is connected to a backfilling guide trough 33 arranged in a downward inclination, and the backfilling guide trough 33 is aligned with the previous planting hole position. After the soil is conveyed from the soil collection cover 23 through the fixed conveying pipe 31, it smoothly transitions into the extended conveying trough 32 through the soil transfer pipe 34. Since the bottom end of the soil transfer pipe 34 is inserted into the extended conveying trough 32, the extended conveying trough 32 can... The backfill guide trough 33 can be moved back and forth within a certain range to adjust the conveying distance, while still receiving soil from the fixed section. The backfill guide trough 33 is aligned with the previous planting hole, allowing the soil to slide out smoothly and be introduced into the target tree pit, realizing a synchronous operation mode of digging and backfilling. It should be noted that the inner wall of the backfill guide trough 33 is smoothed, and the backfill guide trough 33 is moved to a position close to the trunk of the planted seedling for soil backfilling. At this time, the backfilled soil will naturally spread outwards under the action of gravity, which can form a covering on the roots of the seedling. In addition, during the planting process, the backfilled soil needs to be compacted manually. During the compaction process, the backfilled soil can also be further leveled by manual labor to ensure that the soil covers the pit more evenly.

[0045] Furthermore, limiting slide bars 317 are fixedly connected to both sides of the extended conveying trough 32, and limiting slide blocks 318 are fixedly connected to the lower surface of the base plate 1. The limiting slide bars 317 are locked on the limiting slide blocks 318. The cooperation between the limiting slide bars 317 and the limiting slide blocks 318 ensures that when the extended conveying trough 32 is adjusted, it can only slide smoothly along the preset straight trajectory, without swinging left and right, bouncing up and down or twisting. This keeps the outlet of the backfill guide trough 33 always accurately aligned with the previous hole, preventing soil from spilling out.

[0046] Furthermore, a conveying motor 39 is provided at one end of the fixed conveying pipe 31. The body of the conveying motor 39 is fixedly connected to the upper surface of the base plate 1. The motor shaft of the conveying motor 39 is coaxially fixedly connected to the first conveying shaft 35. The shaft of the first conveying shaft 35 located outside the fixed conveying pipe 31 is fixedly fitted with a drive wheel 310. A square inner rod 315 is movably inserted into the shaft of the second conveying shaft 37. The rod of the square inner rod 315 located outside the extended conveying groove 32 is fixedly fitted with a driven wheel 311. A transmission belt 312 is connected between the drive wheel 310 and the driven wheel 311, and the transmission belt 312 movably passes through the base plate 1. The conveying motor 39 directly drives the first conveying shaft 310 inside the fixed conveying pipe 31. 5. The first spiral conveying blade 36 rotates, and the transmission belt 312 transmits power. A square channel 316 is opened in the shaft of the second conveying shaft 37, which cooperates with the square inner rod 315. The square inner rod 315 can transmit the rotational power received by the driven wheel 311 to the second conveying shaft 37 without loss. At the same time, the second conveying shaft 37 can also slide the second spiral conveying blade 38 axially relative to the square inner rod 315, thereby adapting to the distance changes caused by the forward and backward movement of the extended conveying trough 32. This ensures that no matter what position the extended conveying trough 32 is in, the second spiral conveying blade 38 can obtain a stable driving force and rotate synchronously with the first spiral conveying blade 36 to achieve uninterrupted soil conveying.

[0047] Furthermore, a square channel 316 is provided inside the shaft of the second conveying shaft 37, and a square inner rod 315 is movably inserted into the square channel 316. A positioning bearing 313 is also fixedly sleeved on the rod body of the square inner rod 315 located outside the extended conveying groove 32. A positioning connecting rod 314 is fixedly connected between the outer ring of the positioning bearing 313 and the base plate 1. The positioning bearing 313 provides a radial support point for the square inner rod 315, ensuring the smoothness and accuracy of power transmission.

[0048] Working principle: During operation, the device is driven by traction equipment or moves on its own. The battery 14 located on the upper surface of the base plate 1 provides power to all electrical components of the device, while the operator centrally controls and monitors the device through the control cabinet 15.

[0049] After the planting operation begins, the depth-adjusting hole-digging component 2 starts working. In order to accurately set and limit the digging depth, a manually adjustable depth adjustment seat 27 is set on the digging slide rail 24. It is fixed to the outer wall of the slide rail by the positioning knob 215 and is accurately positioned with reference to the scale line 216 on the outer wall of the slide rail. The lower limit switch 212 and the upper limit switch 213 together constitute the electrical limit for lifting and lowering, preventing the drill bit from drilling too deep or lifting, and ensuring operational safety and depth accuracy. During the digging process, the digging auger 21 works inside the soil collection hood 23. The excavated soil is effectively collected in the soil collection hood 23, and the collected soil then enters the soil backfilling component 3 for transportation.

[0050] Soil enters the fixed conveying pipe 31 from the soil collection hood 23, and is conveyed by the first spiral conveying blade 36 to the soil transfer pipe 34 at its end. The bottom end of the soil transfer pipe 34 is inserted into the extended conveying trough 32, so that the soil can smoothly transition to the extended conveying section. Subsequently, the soil is further conveyed by the second spiral conveying blade 38 to the backfill guide trough 33. The backfill guide trough 33 is inclined downwards, and the soil is accurately guided into the previous hole where the seedling has been placed by gravity to complete the backfilling. This cycle continues, and the device continuously completes a series of actions such as digging holes, collecting soil, conveying soil, and backfilling the previous tree pit while moving. It realizes efficient, continuous and automated forestry seedling planting operations. When the last seedling is planted, an additional hole can be dug to backfill the planting hole of the last seedling. Alternatively, the planting hole of the last seedling can be dug and filled manually.

[0051] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0052] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An adjustable-depth forestry seedling planting device, comprising a base plate (1), an adjustable-depth excavation assembly (2), and a soil backfilling assembly (3), characterized in that: The depth-adjusting excavation assembly (2) and the soil backfilling assembly (3) are both connected to the base plate (1). The soil excavated by the depth-adjusting excavation assembly (2) is transported to the soil backfilling assembly (3). The soil backfilling assembly (3) is provided with a fixed conveying section and an extended conveying section. The depth-adjusting hole-drilling assembly (2) includes a hole-drilling auger (21) and a hole-drilling slide rail (24). The hole-drilling slide rail (24) is located on one side of the hole-drilling auger (21). A depth adjustment seat (27) is movably connected to the hole-drilling slide rail (24). A soil collection cover (23) is connected through the body of the base plate (1). The hole-drilling auger (21) is vertically inserted into the soil collection cover (23). The fixed conveying section of the soil backfilling assembly (3) includes a fixed conveying pipe (31), the pipe body of which is connected to one side of the soil collection cover (23). A first conveying shaft (35) is rotatably connected inside the fixed conveying pipe (31), and a first spiral conveying blade (36) is fixedly connected to the shaft of the first conveying shaft (35). The extended conveying section of the soil backfilling assembly (3) includes an extended conveying trough (32), a second conveying shaft (37) is rotatably connected inside the extended conveying trough (32), and a second spiral conveying blade (38) is fixedly connected to the shaft of the second conveying shaft (37). A transmission belt (312) is connected between the first conveying shaft (35) and the second conveying shaft (37).

2. The adjustable-depth forestry seedling planting device according to claim 1, characterized in that: Rollers (11) are connected to the four corners of the lower plate of the base plate (1). A seedling frame (12) and a support frame (13) are fixedly connected to the upper plate of the base plate (1). A storage battery (14) and a control cabinet (15) arranged side by side are fixedly connected to the support frame (13). The storage battery (14) is electrically connected to each electrical component, and the control cabinet (15) is signal connected to each electrical component.

3. The adjustable-depth forestry seedling planting device according to claim 1, characterized in that: The upper end of the drilling auger (21) of the depth-adjusting drilling assembly (2) is connected to the drilling motor (22), and the groove of the drilling slide rail (24) is movably fitted with a limiting slider (25). A drive link (26) is connected between the limiting slider (25) and the body of the drilling motor (22).

4. The adjustable-depth forestry seedling planting device according to claim 3, characterized in that: The bottom end of the hole-digging slide rail (24) is fixedly connected to the base plate (1). A threaded rotating rod (214) is rotatably connected inside the hole-digging slide rail (24). The threaded rotating rod (214) is threaded through the limiting slider (25). A drive motor (210) is fixedly connected to the upper end of the hole-digging slide rail (24). The motor shaft of the drive motor (210) is fixedly connected to the threaded rotating rod (214) on the same axis.

5. The adjustable-depth forestry seedling planting device according to claim 1, characterized in that: A limit stop (211) is movably installed in the groove of the hole-digging slide rail (24). The limit stop (211) is movably sleeved on the rod body of the threaded rotating rod (214). The limit stop (211) is fixedly connected to the depth adjustment seat (27). The depth adjustment seat (27) is U-shaped and is locked on the outer walls of both sides of the hole-digging slide rail (24). A positioning knob (215) is threaded through one side of the depth adjustment seat (27). A scale line (216) is opened on one side of the outer wall of the hole-digging slide rail (24). A lower limit switch (212) is fixedly connected to the upper surface of the limit stop (211). An upper limit switch (213) is connected to the top wall of the groove of the hole-digging slide rail (24).

6. The adjustable-depth forestry seedling planting device according to claim 5, characterized in that: The soil collection cover (23) is located below the base plate (1) and has a movable sleeve (28) on its outer side. An electric telescopic rod (29) is fixedly connected to the outer wall of the movable sleeve (28). The movable front end of the electric telescopic rod (29) is fixedly connected to the lower plate surface of the base plate (1).

7. The adjustable-depth forestry seedling planting device according to claim 1, characterized in that: The fixed conveying pipe (31) of the soil backfilling component (3) is fixedly connected to the upper plate surface of the base plate (1). The conveying end of the fixed conveying pipe (31) is connected to the soil transfer pipe (34). The extended conveying trough (32) is movably arranged directly below the fixed conveying pipe (31), and the bottom end of the soil transfer pipe (34) is inserted into the extended conveying trough (32). The conveying end of the extended conveying trough (32) is connected to the backfilling guide trough (33) arranged in a downward inclination, and the backfilling guide trough (33) is aligned with the previous planting hole position that has been excavated.

8. The adjustable-depth forestry seedling planting device according to claim 7, characterized in that: Limiting slides (317) are fixedly connected to both sides of the extended conveying trough (32), and limiting slides (318) are fixedly connected to the lower surface of the base plate (1), with the limiting slides (317) locked on the limiting slides (318).

9. The adjustable-depth forestry seedling planting device according to claim 8, characterized in that: A conveying motor (39) is provided at one end of the fixed conveying pipe (31). The body of the conveying motor (39) is fixedly connected to the upper plate of the base plate (1). The motor shaft of the conveying motor (39) is fixedly connected to the first conveying shaft (35) along the same axis. The shaft of the first conveying shaft (35) located outside the fixed conveying pipe (31) is fixedly fitted with a drive wheel (310). A square inner rod (315) is movably inserted into the shaft of the second conveying shaft (37). The rod of the square inner rod (315) located outside the extended conveying groove (32) is fixedly fitted with a driven wheel (311). A transmission belt (312) is connected between the drive wheel (310) and the driven wheel (311), and the transmission belt (312) movably passes through the base plate (1).

10. The adjustable-depth forestry seedling planting device according to claim 9, characterized in that: The second conveying shaft (37) has a square channel (316) inside. The square inner rod (315) is movably inserted into the square channel (316). The square inner rod (315) is also fixedly fitted with a positioning bearing (313) on the rod body outside the extended conveying groove (32). The outer ring of the positioning bearing (313) is fixedly connected to the base plate (1) with a positioning connecting rod (314).

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