Pit digging device for seedling planting

Abstract

The invention discloses a pit digging device for seedling planting, which comprises a shock absorber and a fixed shaft fixed at the bottom of the piston end of the shock absorber, and the fixed shaft is provided with a pit digging mechanism; the pit digging mechanism comprises a plurality of fixing sleeves which are slidably connected to a fixing shaft in a sleeving mode, the fixing sleeves and the fixing shaft are connected through a plurality of limiting bolts, and the tail end of the fixing shaft is connected with a ground breaking cone block in a sleeving mode through a thread structure with a self-locking function. Under the interaction of the shock absorber, the fixed shaft, the pit digging mechanism and the sealing rubber gasket, the equal-diameter spiral blades in the pit digging mechanism are mutually embedded and connected, so that a pit meeting the growth requirement of a seedling root system can be dug, a decorative groove can be formed, additional manual operation is reduced, meanwhile, the variable-diameter spiral blades can also improve the water storage and fertilizer storage capacity of the pit, and the planting efficiency is improved. The shock absorber can effectively reduce the impact force in the pit digging process and protect the structure of the device, all the components are firmly connected and tightly sealed, impurities can be prevented from invading, and stable operation of the device is ensured.

Description

Technical Field

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

[0002] In the work of seedling planting, digging holes is an indispensable part, and the digging machine plays a key role in it. With the continuous expansion of the scale of seedling planting, the digging machine can quickly create holes on the ground with its efficient operation ability, which greatly improves the efficiency of digging holes and lays the foundation for the smooth development of seedling planting.

[0003] At present, the pits dug by the spiral blades at the end of the digging machine are basically straight up and down in shape. This single pit type can initially meet the needs of seedling root growth. However, in the process of planting seedlings and backfilling soil, workers are still required to dig greening decorative grooves on the ground surface connected to the dug pits. Straight up and down pits are not easy to store water and fertilizer, which affects the healthy growth of seedlings. Therefore, we proposed a pit digging device for seedling planting to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the above-mentioned background technology and to propose a pit digging device for planting seedlings.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A pit digging device for seedling planting, comprising a shock absorber and a fixed shaft fixed to the bottom of the piston end of the shock absorber, wherein a pit digging mechanism is arranged on the fixed shaft;

[0007] The digging mechanism comprises a plurality of fixed sleeves slidably sleeved on a fixed shaft, the fixed sleeves and the fixed shaft are connected by a plurality of limit bolts, the end of the fixed shaft is sleeved with a ground-breaking cone block through a threaded structure with a self-locking function, the bottom fixed sleeve is fixedly sleeved with a variable-diameter spiral blade, and the other plurality of fixed sleeves are fixedly sleeved with equal-diameter spiral blades;

[0008] The multiple equal-diameter spiral blades from top to bottom are connected in a manner that the ends of the upper layer of equal-diameter spiral blades are embedded in the tops of the lower layer of equal-diameter spiral blades, and the ends of the bottom layer of equal-diameter spiral blades are embedded in the tops of the bottom layer of variable-diameter spiral blades, and the spiral diameters of the multiple equal-diameter spiral blades from bottom to top gradually increase.

[0009] Preferably, the ground-breaking cone block is in the shape of a cone.

[0010] Preferably, the outer side wall of the ground breaking cone block is covered with a wear-resistant coating.

[0011] Preferably, an external thread is provided on the outer side wall of the end of the fixed shaft, a threaded slot hole matching the external thread is provided on the ground breaking cone block, and the external thread on the end of the fixed shaft and the inner side wall of the threaded slot hole are threadedly connected.

[0012] Preferably, sealing rubber gaskets are slidably sleeved on the fixed shafts between two adjacent fixed sleeves and between the lowermost fixed sleeve and the ground breaking cone block.

[0013] Preferably, a plurality of threaded holes matched with the limiting bolts are formed on the fixed shaft, and the limiting bolts penetrate the inner wall of the fixed sleeve and are threadedly connected with the inner wall of the threaded holes.

[0014] Preferably, the diameter change rate of the variable diameter spiral blade increases linearly from bottom to top.

[0015] Preferably, the shock absorber is composed of a shock-absorbing metal shell and a hydraulic damper and a spring arranged therein, and the end of the hydraulic damper is fixedly connected to the top of the fixed shaft.

[0016] Preferably, a limiting mechanism is provided on the fixed shaft, and the limiting mechanism comprises a limiting ring block fixedly sleeved on the fixed shaft, and the top of the uppermost fixed sleeve and the bottom of the limiting ring block are in contact with each other.

[0017] Preferably, a plurality of limiting sliding holes are opened at the top of the uppermost fixing sleeve, a plurality of limiting rods are fixed at the inner top of the limiting ring block, and the outer side wall of the limiting rod and the inner side wall of the limiting sliding hole are slidably connected in the vertical direction.

[0018] The beneficial effects of the present invention are:

[0019] Under the interaction of the shock absorber, fixed shaft, digging mechanism and sealing rubber gasket, the medium-diameter spiral blades in the digging mechanism are interlocked and connected to each other, which can not only dig pits that meet the growth requirements of the seedling roots, but also form decorative grooves to reduce additional manual operations. At the same time, the variable-diameter spiral blades can also improve the water and fertilizer storage capacity of the pits and promote the healthy growth of seedlings. The shock absorber can effectively reduce the impact force during the digging process and protect the device structure. The components are firmly connected and tightly sealed to prevent impurities from intruding and ensure stable operation of the device.

[0020] Under the interaction of the shock absorber, the fixed shaft, the digging mechanism and the limiting mechanism, the limiting mechanism can enhance the stability of the digging mechanism, making the device more stable and greatly extending the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a pit digging device for seedling planting proposed by the present invention;

[0022] Figure 2This is an exploded view of a pit digging device for seedling planting proposed by the present invention;

[0023] Figure 3 A side planing diagram of a fixed axis in a seedling planting digging device proposed by the present invention;

[0024] Figure 4 A side cross-sectional view of a ground-breaking cone block in a pit digging device for seedling planting proposed by the present invention;

[0025] Figure 5 A top view of a variable diameter spiral blade in a seedling planting hole digging device proposed by the present invention;

[0026] Figure 6 A top view of the uppermost spiral blade of equal diameter in a seedling planting hole digging device proposed by the present invention;

[0027] Figure 7 A bottom view of the bottom of the lowest spiral blade of equal diameter in a seedling planting pit digging device proposed by the present invention;

[0028] Figure 8 The present invention provides a top view of a plurality of limiting sliding holes in a hole digging device for planting seedlings.

[0029] In the figure: 1. shock absorber; 2. fixed shaft; 3. fixed sleeve; 4. limit bolt; 5. ground breaking cone block; 6. variable diameter spiral blade; 7. equal diameter spiral blade; 8. sealing rubber gasket; 9. limit ring block; 10. limit sliding hole; 11. limit rod. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] Reference Figure 1-8 A pit digging device for planting seedlings includes a shock absorber 1 and a fixed shaft 2 fixed at the bottom of the piston end of the shock absorber 1. The shock absorber 1 consists of a shock-absorbing metal shell and a hydraulic damper and a spring arranged therein. The end of the hydraulic damper is fixedly connected to the top of the fixed shaft 2.

[0032] It is further explained that the shock absorber 1 is a commonly used means in the prior art. During the digging process, the impact force exerted on the device can be effectively alleviated by the shock absorber 1. The spring, as an elastic element, can store energy when impacted, and the hydraulic damper generates a damping force related to the movement speed by controlling the flow of hydraulic oil. The cooperation of the two ensures that both the reaction force from the ground and the vibration generated by the digging action can be effectively absorbed and dissipated, thereby protecting the structural integrity of the entire device, reducing the vibration impact on the operator, and improving the operating comfort and service life of the device.

[0033] like Figure 2 and Figure 3 As shown, a digging mechanism is provided on the fixed shaft 2; the digging mechanism includes a plurality of fixed sleeves 3 slidably sleeved on the fixed shaft 2, the fixed sleeves 3 and the fixed shaft 2 are connected by a plurality of limit bolts 4, a plurality of threaded holes matched with the limit bolts 4 are opened on the fixed shaft 2, the limit bolts 4 pass through the inner wall of the fixed sleeve 3 and are threadedly connected with the inner wall of the threaded hole.

[0034] It is further explained that this connection method is not only firm and reliable, but also easy to adjust the position of the fixed sleeve 3 on the fixed shaft 2, so that the fixed sleeve 3 can be fixed on the fixed shaft 2 more stably.

[0035] like Figure 3 and Figure 5 As shown, the end of the fixed shaft 2 is sleeved with a ground-breaking cone block 5 through a threaded structure with a self-locking function, an external thread is provided on the outer wall of the end of the fixed shaft 2, and a threaded groove hole matching the external thread is provided on the ground-breaking cone block 5. The external thread on the end of the fixed shaft 2 and the inner wall of the threaded groove hole are threadedly connected.

[0036] It is further explained that the end of the fixed shaft 2 and the ground breaking cone block 5 are threadedly connected, and this threaded connection has a self-locking function, which ensures that the ground breaking cone block 5 will not loosen during operation, providing a guarantee for stable ground breaking.

[0037] like Figure 4 As shown, the ground-breaking cone block 5 is in the shape of a cone, and the outer side wall of the ground-breaking cone block 5 is covered with a wear-resistant coating.

[0038] It is further explained that the shape of the conical ground-breaking cone block 5 is conducive to reducing resistance when breaking the ground, making it easier to insert into the soil. The ground-breaking cone block 5 helps to maintain the ground-breaking performance of the ground-breaking cone block 5 and improve the efficiency of digging holes. The wear-resistant coating is made of tungsten carbide, and its hardness can reach more than 2400HV. The coating thickness is 0.2-0.5 mm. This tungsten carbide wear-resistant coating is prepared by a thermal spraying process and is tightly bonded to the outer wall of the ground-breaking cone block 5. The bonding strength is not less than 50MPa, and can effectively resist the wear caused by friction with hard objects such as sand and stone during the ground-breaking process, thereby greatly improving the durability of the ground-breaking cone block 5.

[0039] like Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown, a variable diameter spiral blade 6 is fixedly sleeved on the bottom fixed sleeve 3, and other multiple fixed sleeves 3 are fixedly sleeved with equal diameter spiral blades 7. The multiple equal diameter spiral blades 7 from top to bottom are connected in a manner that the ends of the upper layer of equal diameter spiral blades 7 are embedded in the top of the next layer of equal diameter spiral blades 7, and the ends of the bottom layer of equal diameter spiral blades 7 are embedded in the top of the bottom layer of variable diameter spiral blades 6.

[0040] Further explanation, from top to bottom, the multiple equal-diameter spiral blades 7 are connected in a manner that the end of the upper layer of equal-diameter spiral blades 7 is embedded in the top of the lower layer of equal-diameter spiral blades 7, and the end of the bottom layer of equal-diameter spiral blades 7 is embedded in the top of the bottom layer of variable-diameter spiral blades 6. The specific embedding connection method is as follows:

[0041] An outwardly extending annular flange is provided at the end of the equal-diameter spiral blade 7. The outer diameter of the annular flange matches the inner diameter of the annular groove at the top of the next layer of equal-diameter spiral blades 7. The thickness of the annular flange is equal to the depth of the annular groove. The two form a clearance fit with a clearance range of 0.1-0.3 mm to ensure that the blades are relatively stable during the operation of the device and can adapt to slight thermal expansion and contraction and vibration to a certain extent.

[0042] At least three positioning protrusions are evenly distributed axially on the circumferential surface of the annular flange. Correspondingly, a positioning groove matched with the positioning protrusion is provided on the circumferential surface of the annular groove. The positioning protrusion and the positioning groove are dovetail-shaped, and their dimensional tolerance is within the range of ±0.05 mm. Through the cooperation of the positioning protrusion and the positioning groove, relative displacement in the circumferential direction between adjacent equal-diameter spiral blades 7 can be effectively prevented.

[0043] The annular flange at the end of the lowest level spiral blade 7 and the annular groove at the top of the lowest level variable diameter spiral blade 6 adopt the same interlocking connection method, so that the entire digging mechanism can work as a stable whole during operation, ensuring the smooth progress of the digging operation.

[0044] This connection method ensures the integrity and stability of the spiral blade during rotation, can effectively transmit torque, and ensures the smooth progress of the digging operation.

[0045] like Figure 2 As shown, the spiral diameters of the multiple equal-diameter spiral blades 7 gradually increase from bottom to top, and the diameter change rate of the variable-diameter spiral blades 6 increases linearly from bottom to top.

[0046] To further explain, the purpose of such a setting is to enable the variable diameter spiral blade 6 to dig a conical fertilization layer at the bottom of the pit for planting seedlings, the equal diameter spiral blade 7 located in the middle can dig a planting layer that meets the planting needs of the seedling roots, and the equal diameter spiral blade 7 located at the top can dig a decorative groove on the ground surface, so that the variable diameter spiral blade 6 and the equal diameter spiral blade 7 can efficiently dig pit layers with different functions and interconnected.

[0047] like Figure 2 As shown, a sealing rubber gasket 8 is slidably sleeved on the fixed shaft 2 between two adjacent fixed sleeves 3 and between the lowermost fixed sleeve 3 and the ground breaking cone block 5 .

[0048] It is further explained that the sealing rubber gasket 8 can prevent dust, dirt and other impurities from entering the connection between the fixed sleeve 3 and the fixed shaft 2 and other key parts, reducing problems such as wear and corrosion caused by the entry of impurities, extending the service life of the device and ensuring the normal operation of the device.

[0049] like Figure 3 As shown, a limiting mechanism is provided on the fixed shaft 2, and the limiting mechanism includes a limiting ring block 9 fixedly sleeved on the fixed shaft 2, and the top of the uppermost fixed sleeve 3 and the bottom of the limiting ring block 9 are in contact with each other.

[0050] To further illustrate, the limiting ring block 9 can make the uppermost fixing sleeve 3 more convenient to install.

[0051] like Figure 3 and Figure 8 As shown, a plurality of limiting sliding holes 10 are opened at the top of the uppermost fixed sleeve 3, a plurality of limiting rods 11 are fixed at the top of the limiting ring block 9, and the outer wall of the limiting rod 11 and the inner wall of the limiting sliding hole 10 are slidably connected in the vertical direction.

[0052] It is further explained that the purpose of setting the limiting rod 11 is to limit the fixing sleeve 3 in the axial direction to avoid axial movement during the pit digging process, thereby further enhancing the stability of the pit digging mechanism.

[0053] The present invention can be explained by the following operation mode:

[0054] Device assembly

[0055] First, let the workers stand up the fixed shaft 2, put the fixed sleeve 3 equipped with the maximum diameter equal-diameter spiral blade 7 on the fixed shaft 2, and insert the limiting rod 11 into the limiting sliding hole 10. When the top of the fixed sleeve 3 contacts the bottom of the limiting ring block 9, use multiple limiting bolts 4 to fix the fixed sleeve 3 on the fixed shaft 2.

[0056] Then, the fixed sleeve 3 installed with the second largest diameter equal-diameter spiral blade 7 is put on the fixed shaft 2, and the end of the upper equal-diameter spiral blade 7 is engaged with the top of the lower equal-diameter spiral blade 7. Then, the workers use multiple limit bolts 4 to fix the fixed sleeve 3 on the fixed shaft 2, and repeat the above installation process until the fixed sleeve 3 of the variable-diameter spiral blade 6 is installed. Finally, the ground-breaking cone block 5 is installed and fixed at the end of the fixed shaft 2, and the top of the ground-breaking cone block 5 is also allowed to rest against the bottom of the lowest fixed sleeve 3.

[0057] Device startup and positioning

[0058] Install the top of the shock absorber 1 and the end of the mechanical arm of the digging machine, and let the digging machine move the device to the predetermined position where the pit needs to be dug, ensuring that the shock absorber 1 is in normal working condition and the fixed shaft 2 is perpendicular to the ground. The vertical pit is conducive to the planting of seedlings.

[0059] Digging operation

[0060] Ask the workers to start the digging machine, and let the mechanical arm of the digging machine drive the shock absorber 1 and the fixed shaft 2 and the digging mechanism below it to start rotating downward. At this time, the ground-breaking cone block 5 first contacts the ground. Due to its conical design and the wear-resistant coating on the outer wall, it can be easily inserted into the soil. The ground-breaking cone block 5 is firmly connected to the end of the fixed shaft 2 through a threaded structure with a self-locking function to ensure that it will not loosen during the ground-breaking process.

[0061] As the fixed shaft 2 rotates, the equal-diameter spiral blades 7 and the variable-diameter spiral blades 6 begin to play a role. During the rotation process, the equal-diameter spiral blades 7 and the variable-diameter spiral blades 6 continuously bring the soil out of the pit. The multiple equal-diameter spiral blades 7 are connected by the ends being embedded with the top of the next layer, and the embedding of the bottom layer of equal-diameter spiral blades 7 with the top of the bottom layer of variable-diameter spiral blades 6 ensures the stability and integrity of the entire digging mechanism, so that the torque can be effectively transmitted, ensuring the smooth progress of the digging operation.

[0062] During the digging process, the fixed sleeve 3 is fixed to the fixed shaft 2 by the limiting bolt 4, ensuring the stability of the axial position of the spiral blade. The sealing rubber gasket 8 on the fixed shaft 2 between two adjacent fixed sleeves 3 and between the lowest fixed sleeve 3 and the ground-breaking cone block 5 prevents dust and dirt from entering the key parts, ensuring the normal operation of the device.

[0063] Pothole Formation and Inspection

[0064] The device is continuously rotated until the desired pit depth is reached. At this time, the variable diameter spiral blade 6 can dig a conical fertilization layer at the bottom of the pit for planting seedlings, the equal diameter spiral blade 7 in the middle can dig a planting layer that meets the planting of seedling roots, and the equal diameter spiral blade 7 at the top can dig a decorative groove on the ground surface. The depth of the pit can be monitored by setting a scale on the fixed shaft 2 or using other depth measurement tools. When the predetermined depth is reached, the power source is turned off to stop the rotation of the device.

[0065] Device shutdown and subsequent processing

[0066] After completing the digging, the digging machine will slowly lift the device out of the pit, keeping the device clean for next use.

[0067] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pit digging device for seedling planting, characterized in that: It comprises a shock absorber (1) and a fixed shaft (2) fixed to the bottom of the piston end of the shock absorber (1), wherein a pit digging mechanism is arranged on the fixed shaft (2); The digging mechanism comprises a plurality of fixed sleeves (3) slidably sleeved on a fixed shaft (2); the fixed sleeves (3) and the fixed shaft (2) are connected via a plurality of limit bolts (4); a ground-breaking cone block (5) is sleeved at the end of the fixed shaft (2) via a threaded structure with a self-locking function; a variable-diameter spiral blade (6) is fixedly sleeved on the bottom fixed sleeve (3); and a plurality of other fixed sleeves (3) are fixedly sleeved on equal-diameter spiral blades (7); The plurality of equal-diameter spiral blades (7) from top to bottom are connected in a manner such that the end of the upper layer of equal-diameter spiral blades (7) is embedded in the top of the lower layer of equal-diameter spiral blades (7), and the end of the lowest layer of equal-diameter spiral blades (7) is embedded in the top of the lowest layer of variable-diameter spiral blades (6), and the spiral diameters of the plurality of equal-diameter spiral blades (7) from bottom to top gradually increase.

2. A seedling planting digging device according to claim 1, characterized in that: The ground-breaking cone block (5) is in the shape of a cone.

3. A seedling planting digging device according to claim 1, characterized in that: The outer side wall of the ground breaking cone block (5) is covered with a wear-resistant coating.

4. A seedling planting digging device according to claim 1, characterized in that: An external thread is provided on the outer side wall of the end of the fixed shaft (2), and a threaded slot hole matching the external thread is provided on the ground breaking cone block (5). The external thread on the end of the fixed shaft (2) is threadedly connected to the inner side wall of the threaded slot hole.

5. The seedling planting digging device according to claim 1, characterized in that: Sealing rubber gaskets (8) are slidably sleeved on the fixed shaft (2) between two adjacent fixed sleeves (3) and between the bottommost fixed sleeve (3) and the ground-breaking cone block (5).

6. The seedling planting digging device according to claim 1, characterized in that: The fixed shaft (2) is provided with a plurality of threaded holes matched with the limiting bolts (4); the limiting bolts (4) penetrate the inner wall of the fixed sleeve (3) and are threadedly connected to the inner wall of the threaded holes.

7. The seedling planting digging device according to claim 1, characterized in that: The diameter change rate of the variable diameter spiral blade (6) increases linearly from bottom to top.

8. The seedling planting digging device according to claim 1, characterized in that: The shock absorber (1) is composed of a shock absorbing metal shell and a hydraulic damper and a spring arranged therein, and the end of the hydraulic damper is fixedly connected to the top of the fixed shaft (2).

9. The seedling planting digging device according to claim 1, characterized in that: A limiting mechanism is arranged on the fixed shaft (2), and the limiting mechanism comprises a limiting ring block (9) fixedly sleeved on the fixed shaft (2), and the top of the uppermost fixed sleeve (3) and the bottom of the limiting ring block (9) are in contact with each other.

10. A seedling planting digging device according to claim 9, characterized in that: A plurality of limiting sliding holes (10) are provided on the top of the uppermost fixed sleeve (3), a plurality of limiting rods (11) are fixed on the top of the limiting ring block (9), and the outer side walls of the limiting rods (11) and the inner side walls of the limiting sliding holes (10) are slidably connected in the vertical direction.

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