Adjustable digging device for tree planting

Abstract

The present invention discloses an adjustable digging device for tree planting, which relates to the field of agricultural planting technology, including a connecting mechanism, a lifting mechanism, a motor base, a drill rod, and a spiral drill bit. A motor is installed on the motor base, and the motor shaft of the motor is connected to the drill rod by driving; a mounting sleeve is fixedly connected to the bottom of the motor base, and two swing arms are hinged on the periphery of the mounting sleeve, and a scraper is connected to the end of the swing arm away from the mounting sleeve; a driving mechanism is arranged on the periphery of the mounting sleeve, and the driving mechanism is used to drive the two swing arms to swing in the horizontal plane. In the present invention, when the drill rod rotates, the spiral drill bit drills into the ground to form a planting pit on the ground. When the soil in the planting pit is brought to the surface along the surface of the spiral drill bit, the driving mechanism drives the two swing arms to move synchronously, thereby causing the scraper to gather the planting soil scattered on the surface to one place, thereby allowing the planting soil to be accumulated in one place on the surface, making it convenient for subsequent workers to backfill the planting soil into the planting pit, thereby improving the planting efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural planting, and in particular to an adjustable pit digging device for planting trees. Background Art

[0002] A tree is a tall tree with an independent trunk extending from its roots, with a distinct trunk and crown. Woody plants with a single upright trunk, typically ranging from six to several dozen meters in height, are called trees. They are often tall, with a distinct, tall trunk. They are categorized by height into four levels: large trees (over 31 meters), large trees (21-30 meters), medium trees (11-20 meters), and small trees (6-10 meters). Trees are the opposite of low shrubs; commonly seen tall trees are trees, such as kapok trees, pine trees, magnolia trees, and white birch trees. Trees are further divided into deciduous trees and evergreen trees, depending on whether they shed their leaves in winter or the dry season.

[0003] When planting trees, it is necessary to use a digging tool to dig a planting hole on the ground, then put the tree seedlings into the dug planting hole, and then backfill the soil brought off the ground when digging the planting hole into the planting hole. After searching, China Utility Model Patent Publication No. CN217985935U discloses a depth-adjustable digging device for seedling planting, including a device seat, a fixed seat is provided on the device seat, a drive box is provided on the fixed seat, and also includes: an adjustment mechanism, one end of the adjustment mechanism is connected to the adjustment seat, and one end of the adjustment seat is slidably connected to the fixed seat; a depth display mechanism, one end of the depth display mechanism is connected to the adjustment seat; a digging mechanism, and the digging mechanism is provided on the adjustment seat.

[0004] When digging a planting hole, the digging device in the above-mentioned prior art drills into the ground through a spiral digging drill bit, and then drills a planting hole on the ground. When the digging drill bit is drilling the planting hole, the soil in the planting hole will be carried away to the planting hole along the surface of the spiral digging drill bit and scattered on the ground. Since the soil in the planting hole is scattered on the ground, it is relatively scattered. Therefore, when backfilling the soil subsequently, workers need to spend a long time to gather the planting soil scattered on the surface and then backfill the planting soil into the planting hole. This method results in low planting efficiency. Summary of the Invention

[0005] The object of the present invention is to provide an adjustable digging device for tree planting to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An adjustable hole-digging device for tree planting, comprising:

[0008] A connecting mechanism, wherein the connecting mechanism is provided with a lifting mechanism;

[0009] A motor base is connected to the lifting mechanism, the motor base is vertically connected to a drill rod, a spiral drill bit is fixedly sleeved on the periphery of the drill rod, and a motor is installed on the motor base, and the motor shaft of the motor is drivingly connected to the drill rod;

[0010] A mounting sleeve is fixedly connected to the bottom of the motor seat through a plurality of pull rods, and two swing arms are hingedly connected to the periphery of the mounting sleeve, and a scraper is connected to one end of the swing arm away from the mounting sleeve;

[0011] A driving mechanism is provided on the periphery of the mounting sleeve, and the driving mechanism is used to drive the two swing arms to swing in a horizontal plane.

[0012] Through the above technical solution, when the drill rod rotates, the spiral drill bit drills into the ground to form a planting pit on the ground. When the soil in the planting pit is brought to the surface along the surface of the spiral drill bit, the driving mechanism drives the two swing arms to move synchronously, so that the scraper gathers the planting soil scattered on the surface to one place, so that the planting soil can be accumulated in one place on the surface, which is convenient for subsequent staff to backfill the planting soil into the planting pit, thereby improving the planting efficiency.

[0013] Furthermore, the connecting mechanism includes a carrier connecting seat, one end of which is fixedly connected to a fixing plate, a plurality of columns are vertically slidably penetrated through the outer wall of the fixing plate, and the lower ends of the columns are fixedly connected to the motor seat.

[0014] Through the above technical solution, the carrier connecting seat is connected to the external carrier, so that when the carrier moves, it can drive the carrier connecting seat to move synchronously, thereby allowing the spiral drill bit to drill holes at different positions.

[0015] Furthermore, the lifting mechanism includes a lifting cylinder installed on the motor base, and the cylinder rod of the lifting cylinder is fixedly connected to the fixing plate.

[0016] Through the above technical solution, the cylinder rod of the lifting cylinder is extended and retracted, thereby driving the motor base to move up and down, so that the spiral drill bit can drill holes on the ground.

[0017] Furthermore, the diameter of the spiral drill bit decreases from top to bottom.

[0018] Through the above technical solution, the resistance of the spiral drill bit during drilling is reduced, thereby allowing the spiral drill bit to drill into the ground soil more smoothly.

[0019] Furthermore, the driving mechanism includes a mounting arm fixedly connected to the periphery of the mounting sleeve, a translation cylinder is installed at one end of the mounting arm away from the mounting sleeve, the cylinder rod of the translation cylinder is fixedly connected to a movable hinge seat, and an outer wall of the mounting arm is provided with a clearance groove for the movable hinge seat to pass freely, a hinge rod is hinged on each side of the movable hinge seat, and the end of the hinge rod away from the movable hinge seat is correspondingly hinged to the swing arm.

[0020] Through the above technical solution, the cylinder rod of the translation cylinder is extended, thereby driving the movable hinge seat to move toward the mounting sleeve, and then the hinge rod drives the swing arm to swing. When the swing arm swings, the scraper can swing around the rotating fulcrum of the swing arm on the mounting sleeve.

[0021] Furthermore, the two swing arms are symmetrically arranged along the axial direction of the mounting sleeve.

[0022] Through the above technical solution, the two scrapers can evenly scrape the planting soil scattered on the surface to one place.

[0023] Furthermore, a reset cylinder is vertically installed at one end of the swing arm away from the mounting sleeve, and the cylinder rod of the reset cylinder is fixedly connected to a mounting plate. A floating mechanism is provided on the mounting plate, and the floating mechanism is connected to the scraper.

[0024] Through the above technical solution, the floating mechanism is driven up and down by the reset cylinder, so that the squeezing force between the scraper and the ground surface can be adjusted, that is, when the extension length of the cylinder rod of the reset cylinder increases, the squeezing force of the scraper on the ground surface increases, and the scraper can gather the fine soil on the ground surface; when the extension length decreases, the squeezing force of the scraper on the ground surface decreases, and the scraper will not scrape the ground surface when it is reset.

[0025] Furthermore, the floating mechanism includes two sliding rods vertically slidingly inserted into the mounting plate, the lower ends of the sliding rods are fixedly connected to the scraper, and the opposite surfaces of the two adjacent scrapers are in sliding contact. A spring is wrapped around the sliding rod, and the two ends of the spring elastic force direction elastically press against the mounting plate and the scraper respectively. A reciprocating lifting unit is provided on the periphery of the mounting sleeve, and the reciprocating lifting unit is used to drive the two adjacent sliding rods to move synchronously in opposite directions when the swing arm rotates.

[0026] Through the above technical solution, when the cylinder rod of the reset cylinder is extended, the degree of compression of the spring by the mounting plate will increase, thereby increasing the extrusion force of the scraper on the ground surface.

[0027] Furthermore, the cross section of the sliding rod is rectangular.

[0028] The above technical solution makes it difficult for the sliding rod to deflect.

[0029] Furthermore, the reciprocating lifting unit includes a sliding pin horizontally fixed to the outer wall of the sliding rod facing the mounting sleeve, the outer wall of the mounting sleeve is connected to a fixing ring, the periphery of the fixing ring is coaxially fixed with an arc plate, the axial direction of the arc plate is coaxial with the rotation axis of the swing arm, the periphery of the arc plate is provided with sliding grooves connected end to end in sequence, and the sliding pin is slidably engaged in the sliding groove.

[0030] Through the above technical solution, when the swing arm swings, the sliding pin will slide in the sliding groove, thereby causing the two adjacent sliding rods to move, and the two sliding rods to move up and down, thereby causing the two adjacent scrapers to move up and down, to produce a cutting effect on the planting soil on the surface, and then crush the harder planting soil to facilitate subsequent backfilling work.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. In the present invention, when the drill rod rotates, the auger drill bit drills into the ground to form a planting pit on the ground. When the soil in the planting pit is brought to the surface along the surface of the auger drill bit, the driving mechanism drives the two swing arms to move synchronously, thereby causing the scraper to gather the planting soil scattered on the surface to one place, so that the planting soil can be accumulated in one place on the surface, making it easier for subsequent workers to backfill the planting soil into the planting pit, thereby improving the planting efficiency;

[0033] 2. In the present invention, the floating mechanism is driven up and down by a reset cylinder, thereby adjusting the pressure between the scraper and the ground surface. That is, when the extension length of the cylinder rod of the reset cylinder increases, the pressure of the scraper on the ground surface increases, thereby allowing the scraper to gather finely divided soil on the ground surface. When the extension length decreases, the pressure of the scraper on the ground surface decreases, thereby preventing the scraper from scraping the ground surface when it is reset.

[0034] 3. In the present invention, when the swing arm swings, the sliding pin will slide in the sliding groove, thereby causing the two adjacent sliding rods to move, and the two sliding rods to move up and down, thereby causing the two adjacent scrapers to move up and down, so as to produce a cutting effect on the planting soil on the surface, and then crush the harder planting soil to facilitate subsequent backfilling work. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the overall structure of an adjustable digging device for tree planting in the present invention;

[0036] Figure 2 for Figure 1 Schematic diagram of the position relationship of the first perspective;

[0037] Figure 3 for Figure 2 A magnified schematic diagram of the local structure at point A;

[0038] Figure 4 for Figure 1 Schematic diagram of the positional relationship of the second perspective;

[0039] Figure 5 A schematic diagram of the positional relationship among the mounting sleeve, mounting arm, and translation cylinder after assembly in the present invention;

[0040] Figure 6 for Figure 5 A schematic diagram of the positional relationship from another perspective;

[0041] Figure 7 for Figure 6 A magnified schematic diagram of the local structure at point B in the middle;

[0042] Figure 8 This is a schematic diagram of the positional relationship between the scraper and the sliding rod after assembly in the present invention.

[0043] In the figure, the description of each figure mark is as follows: 1. Carrier connecting seat; 2. Fixed plate; 3. Column; 4. Lifting cylinder; 5. Motor; 6. Motor seat; 7. Drill rod; 8. Mounting sleeve; 9. Scraper; 10. Auger bit; 11. Translation cylinder; 12. Reset cylinder; 13. Connecting plate; 14. Sliding pin; 15. Arc plate; 16. Sliding groove; 17. Sliding rod; 18. Spring; 19. Mounting plate; 20. Swing arm; 21. Mounting arm; 22. Hinge rod; 23. Movable hinge seat; 24. Air avoidance groove. DETAILED DESCRIPTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0045] See also Figure 1 - Figure 8The present invention provides a technical solution: an adjustable digging device for tree planting, comprising a carrier connecting seat 1, which is connected to an external movable carrier by screws, such as a tractor, so that when the carrier moves, it can synchronously drive the carrier connecting seat 1 to move, and a fixing plate 2 is welded and installed at one end of the carrier connecting seat 1, and two columns 3 are vertically penetrated through the upper and lower outer walls of the fixing plate 2, and the two columns 3 are respectively located on the opposite sides of the fixing plate 2, and the columns 3 can slide freely up and down on the fixing plate 2, and the two columns 3 is fixedly connected to a motor base 6, on which a motor 5 is mounted. The motor shaft of the motor 5 is connected to a drill rod 7 through a coupling. When the motor shaft of the motor 5 rotates, the drill rod 7 can be driven to rotate. In addition, an auger bit 10 is fixedly sleeved on the periphery of the drill rod 7. The overall profile of the auger bit 10 is similar to that of a common spiral auger. A tip block is welded to the lower end of the drill rod 7 to facilitate the insertion of the drill rod 7 into the ground. In addition, the diameter of the auger bit 10 decreases from top to bottom, so that the auger bit 10 can drill into the ground more smoothly.

[0046] A lifting cylinder 4 is installed on the outer wall of one side of the motor base 6. A welding plate is welded to the end of the cylinder rod of the lifting cylinder 4. The welding plate is welded to the fixed plate 2, so that when the cylinder rod of the lifting cylinder 4 is extended and retracted, the motor base 6 can be driven to move up and down. Two pull rods are vertically welded to the bottom of the motor base 6. The lower ends of the two pull rods are jointly fixed with a mounting sleeve 8. The mounting sleeve 8 is mounted on the periphery of the drill rod 7 and has a gap with the periphery of the drill rod 7, so that the mounting sleeve 8 will not interfere with the rotation of the drill rod 7. In addition, the periphery of the mounting sleeve 8 is fixed with ear blocks symmetrically along its axial direction, and each of the two ear blocks is rotatably connected to a swing arm 20 (such as Figure 5 As shown), the two swing arms 20 are symmetrically arranged along the axial direction of the mounting sleeve 8. The swing arms 20 can rotate horizontally on the ear block, that is, the swing arms 20 can rotate in the horizontal plane. In addition, a reset cylinder 12 is vertically mounted on the end of the swing arm 20 away from the mounting sleeve 8. The cylinder rod of the reset cylinder 12 is fixedly connected to the mounting plate 19. Two sliding rods 17 are vertically penetrated on the mounting plate 19. The sliding rods 17 can slide vertically freely on the mounting plate 19. In addition, the cross-section of the sliding rods 17 is rectangular, which in turn prevents the sliding rods 17 from deflecting on the mounting plate 19.

[0047] The lower end of the sliding rod 17 is fixedly connected to a scraper 9. The width of the lower end of the scraper 9 decreases from top to bottom. In addition, the scrapers 9 on two adjacent sliding rods 17 are connected to each other, that is, the opposite surfaces of the two scrapers 9 slide together. A spring 18 is wrapped around the sliding rod 17. The two ends of the spring 18 in the direction of elastic force elastically press against the mounting plate 19 and the scraper 9 respectively, and the spring 18 gives the scraper 9 potential energy to move downward.

[0048] A mounting arm 21 is fixedly connected to the periphery of the mounting sleeve 8, and a translation cylinder 11 is installed at the end of the mounting arm 21 away from the mounting sleeve 8. The cylinder rod of the translation cylinder 11 is fixedly connected to a movable hinge seat 23. An air escape groove 24 is provided on the outer wall of the mounting arm 21 for the movable hinge seat 23 to pass freely. A hinge rod 22 is hinged on each side of the movable hinge seat 23. The end of the hinge rod 22 away from the movable hinge seat 23 is correspondingly hinged on the swing arm 20. The cylinder rod of the translation cylinder 11 is extended, thereby driving the movable hinge seat 23 to move toward the direction of the mounting sleeve 8, and then the hinge rod 22 drives the swing arm 20 to swing. When the swing arm 20 swings, the scraper 9 can swing around the rotation fulcrum of the swing arm 20 on the mounting sleeve 8;

[0049] Sliding rod 17 (such as Figure 3 As shown in the figure, a sliding pin 14 is welded horizontally on the outer wall of one side facing the mounting sleeve 8, and a fixing ring is connected to the outer wall of the mounting sleeve 8. A connecting plate 13 is welded on the upper end face of the fixing ring. The connecting plate 13 and the fixing ring can be integrally formed. In addition, an arc plate 15 is welded on the end of the connecting plate 13 away from the fixing ring. The arc center of the arc plate 15 coincides with the axis of the fixing ring, so that the fixing ring and the arc plate 15 are coaxial. The axial direction of the arc plate 15 is coaxial with the rotation axis of the swing arm 20. The periphery of the arc plate 15 is provided with sliding grooves 16 connected end to end. The sliding pin 14 is slidably engaged in the sliding groove 16. When the swing arm 20 swings, the sliding pin 14 Sliding in the sliding groove 16, the two adjacent sliding rods 17 are moved, and the two sliding rods 17 are in an up-and-down movement state, thereby causing the two adjacent scrapers 9 to move up and down, to produce a cutting effect on the planting soil on the surface, and then crush the harder planting soil to facilitate subsequent backfilling work. In addition, in this embodiment, the width of the sliding groove 16 is greater than the diameter of the sliding pin 14, so that the sliding pin 14 has a small space for up and down movement in the sliding groove 16. The sliding groove 16 is composed of inclined holes connected end to end, so that when the sliding pin 14 slides in the sliding groove 16, the height of the sliding pin 14 from the ground continuously changes back and forth.

[0050] Working principle of the present invention:

[0051] The mobile carrier moves the device to a suitable position, and then the lifting cylinder 4 is started, the cylinder rod of the lifting cylinder 4 is extended, and then the motor seat 6 is driven to move downward, so that the tip block at the end of the drill rod 7 can be inserted into the surface soil, and then the motor 5 is started, the motor shaft of the motor 5 rotates, and then the drill rod 7 is driven to rotate. When the drill rod 7 rotates, the spiral drill bit 10 will generate a force on the surface soil, and then a hole can be drilled in the surface soil. The drilled hole is the planting pit;

[0052] During the drilling process, the soil in the planting pit will be brought out to the planting pit along the surface of the spiral drill bit 10, and will be scattered around the planting pit along the surface of the spiral drill bit 10. At this time, the soil brought out of the planting pit is relatively scattered, and at this time, the cylinder rod of the translation cylinder 11 is in a retracted state, the movable hinge seat 23 is located at the end of the mounting arm 21 away from the mounting sleeve 8, and the two swing arms 20 are in a state of being retracted toward the translation cylinder 11 (such as Figure 6 As shown, the two scrapers 9 swing toward the direction close to the translation cylinder 11), at this time the distance between the two scrapers 9 is smaller, and less planting soil falls between the two scrapers 9;

[0053] After the hole is drilled in place, it is first necessary to make the lower end of the scraper 9 close to the ground surface, that is, to start the reset cylinder 12, and the cylinder rod of the reset cylinder 12 is extended to drive the mounting plate 19 to move downward, and the squeezing force of the mounting plate 19 on the spring 18 is increased, thereby compressing the spring 18, thereby causing the sliding pin 14 to abut against the inner wall of the sliding groove 16, thereby increasing the squeezing force of the scraper 9 on the ground surface, and then the cylinder rod of the translation cylinder 11 is extended to drive the movable hinge seat 23 to move in the direction of the mounting sleeve 8. When the movable hinge seat 23 moves in the direction close to the mounting sleeve 8, the hinge rod 22 drives the swing arm 20 to swing, so that the swing arm 20 rotates in the direction away from each other along the hinged connection with the ear block, thereby enabling the swing arm 20 to drive the scraper 9 to move in the direction away from the translation cylinder 11. When the swing arm 20 rotates, it will drive the scraper 9 to move synchronously;

[0054] During the rotation of the swing arm 20, the sliding pin 14 will slide in the sliding groove 16, and the sliding directions of the two adjacent sliding pins 14 in the sliding groove 16 will be in an up-and-down state, that is, when one sliding pin 14 moves upward, the other sliding pin 14 will move downward, thereby enabling the two sliding pins 14 to drive the sliding rod 17 to move up and down, thereby enabling the two adjacent scrapers 9 to move up and down, and when the two scrapers 9 move up and down, they can produce a cutting effect on the planting soil brought to the ground, thereby being able to cut the harder planting soil near the scraper 9, thereby facilitating the subsequent backfilling of the planting soil into the planting pit;

[0055] After the swing arm 20 swings into place, Figure 1As shown, the scraper 9 can gather the scattered planting soil at the edge of the planting pit mouth to a relatively concentrated area, so that the planting soil can be gathered in one place, which is convenient for backfilling the planting soil into the planting pit later. After the swing arm 20 is swung into place, the reset cylinder 12 is first started, the cylinder rod of the reset cylinder 12 is shortened, and the elastic supporting force of the spring 18 on the scraper 9 is reduced, thereby reducing the squeezing force of the scraper 9 on the ground surface. Then the cylinder rod of the translation cylinder 11 is shortened. When the cylinder rod of the translation cylinder 11 is shortened, the movable hinge seat 23 is driven to move in the direction away from the mounting sleeve 8, thereby causing the hinge rod 22 to pull the swing arm 20 to swing, thereby causing the two swing arms 20 to swing in the direction of the translation cylinder 11. Since the squeezing force of the scraper 9 on the ground surface is small, the scraper 9 will not be subjected to large wear.

[0056] Then the cylinder rod of the lifting cylinder 4 is shortened, thereby driving the motor seat 6 to move upward and pulling the drill rod 7 out of the planting pit. The mobile carrier then continues to move the fixed stroke and continues the drilling work of the planting pit through the above steps, so that planting pits with roughly equal spacing can be formed on the ground surface, and the planting soil accumulation direction at the edge of the planting pit mouth is consistent. In this way, during the subsequent backfilling operation, workers can more conveniently fill a sufficient amount of planting soil into the planting pit so that the backfill soil in the planting pit meets the planting needs. And because the accumulation direction of the planting soil is consistent, workers only need to rely on simple tools to fill the gathered planting soil back into the planting pit, thereby reducing the labor intensity of workers. In addition, when the swing arm 20 swings, the scraper 9 reciprocating up and down motion can cut the harder planting soil, thereby achieving the purpose of reducing the volume of planting soil.

[0057] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable digging device for tree planting, characterized in that: include: A connecting mechanism, wherein the connecting mechanism is provided with a lifting mechanism; A motor base (6) is connected to the lifting mechanism for driving, a drill rod (7) is connected to the motor base (6) for vertical rotation, a spiral drill bit (10) is fixedly sleeved on the periphery of the drill rod (7), a motor (5) is installed on the motor base (6), and a motor shaft of the motor (5) is connected to the drill rod (7) for driving; A mounting sleeve (8) is fixedly connected to the bottom of the motor seat (6) via a plurality of pull rods, two swing arms (20) are hingedly connected to the periphery of the mounting sleeve (8), and a scraper (9) is connected to one end of the swing arm (20) away from the mounting sleeve (8); A driving mechanism provided on the periphery of the mounting sleeve (8), the driving mechanism being used to drive the two swing arms (20) to swing in a horizontal plane; A reset cylinder (12) is vertically mounted on one end of the swing arm (20) away from the mounting sleeve (8); a cylinder rod of the reset cylinder (12) is fixedly connected to a mounting plate (19); a floating mechanism is provided on the mounting plate (19); and the floating mechanism is connected to the scraper (9); The floating mechanism includes two sliding rods (17) vertically slidingly penetrated on the mounting plate (19), the lower end of the sliding rod (17) is fixed to the scraper (9), and the opposite surfaces of the two adjacent scrapers (9) are in sliding contact, a spring (18) is wound around the sliding rod (17), and the two ends of the spring (18) in the elastic direction elastically press against the mounting plate (19) and the scraper (9) respectively, and a reciprocating lifting unit is provided on the periphery of the mounting sleeve (8), and the reciprocating lifting unit is used to drive the two adjacent sliding rods (17) to move synchronously in the opposite direction when the swing arm (20) rotates; The reciprocating lifting unit includes a sliding pin (14) fixed horizontally to the outer wall of the sliding rod (17) facing the mounting sleeve (8), the outer wall of the mounting sleeve (8) is connected to a fixing ring, the periphery of the fixing ring is coaxially fixed with an arc plate (15), the axial direction of the arc plate (15) is coaxial with the rotation axis of the swing arm (20), the periphery of the arc plate (15) is provided with sliding grooves (16) connected in sequence from end to end, and the sliding pin (14) is slidably engaged in the sliding groove (16).

2. The adjustable digging device for tree planting according to claim 1, characterized in that: The connection mechanism comprises a carrier connection seat (1), one end of the carrier connection seat (1) is fixedly connected to a fixed plate (2), a plurality of columns (3) are vertically slidably penetrated through the outer wall of the fixed plate (2), and the lower ends of the columns (3) are fixedly connected to the motor seat (6).

3. The adjustable digging device for tree planting according to claim 2, characterized in that: The lifting mechanism comprises a lifting cylinder (4) mounted on the motor seat (6), and a cylinder rod of the lifting cylinder (4) is fixedly connected to the fixed plate (2).

4. The adjustable digging device for tree planting according to claim 1, characterized in that: The diameter of the spiral drill bit (10) decreases from top to bottom.

5. The adjustable digging device for tree planting according to claim 1, characterized in that: The driving mechanism includes a mounting arm (21) fixedly connected to the periphery of the mounting sleeve (8), a translation cylinder (11) is mounted on one end of the mounting arm (21) away from the mounting sleeve (8), a cylinder rod of the translation cylinder (11) is fixedly connected to a movable hinge seat (23), an outer wall of the mounting arm (21) is provided with an escape groove (24) for the movable hinge seat (23) to pass freely, a hinge rod (22) is hinged on each side of the movable hinge seat (23), and the end of the hinge rod (22) away from the movable hinge seat (23) is correspondingly hinged to the swing arm (20).

6. The adjustable digging device for tree planting according to claim 1, characterized in that: The two swing arms (20) are symmetrically arranged along the axial direction of the mounting sleeve (8).

7. The adjustable digging device for tree planting according to claim 6, characterized in that: The cross section of the sliding rod (17) is rectangular.

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