An adjustable depth rotary tiller device

Abstract

The utility model discloses a rotavator device of adjustable ploughing depth relates to agricultural machinery technical field, and it is designed to solve the current device difficultly flexible adaptation different crops to the diversification demand of soil ploughing depth's technical problem, including installation mechanism and the rotavator mechanism of installation mechanism installation, the installation mechanism includes the mounting plate, the upper end of mounting plate is provided with hydraulic equipment, the rotavator mechanism includes the mounting bracket, the rotavator shaft is rotatably installed in the mounting bracket, is provided with the rotavator blade on the rotavator shaft, the upper end of mounting bracket is provided with the fixed plate, rotatably installed between the fixed plate is the adjusting plate, the end of adjusting plate rotatably connects the protective cover shell, the utility model has the depth flexible adjustment of rotavator blade through the drive of hydraulic equipment, need not manual dismounting, adapts different crops ploughing depth demand, and the cooperation adjusting plate linkage protective cover shell, ensure the case of protection without influence ploughing depth adjustment, improve the advantage such as work efficiency and security.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and more specifically, to a rotary tiller device with adjustable tillage depth. Background Technology

[0002] A rotary tiller is a tractor-driven farming machine primarily used to break up soil and level the ground, creating suitable soil conditions for sowing or transplanting. It uses high-speed rotating blades to cut and break up soil clods, effectively mixing surface straw, weeds, and soil to improve soil aeration and water retention. It is highly efficient, typically reaching a depth of 10-16 cm, and can complete multiple tasks such as tilling, harrowing, and leveling in one pass, reducing the number of times the machine needs to enter the field and minimizing soil compaction. In modern agriculture, rotary tillers are key equipment, particularly suitable for pre-planting preparation of crops such as vegetables and rice. They can also be used for soil management in orchards and tea gardens, significantly reducing the labor costs of traditional farming and improving agricultural production efficiency.

[0003] Rotary tillers have a working state and a retracted state. When working, the folded orientation allows the blades to penetrate the soil. However, the dustproof casing limits the depth at which the blades are embedded in the soil, making it difficult to flexibly adapt to the diverse soil tillage depth requirements of different crops. Therefore, we propose a rotary tiller device with adjustable tillage depth. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a rotary tiller device with adjustable tillage depth to solve the technical problem that the current device is difficult to flexibly adapt to the diverse needs of different crops for soil tillage depth.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an adjustable tillage depth rotary tiller device, including an installation mechanism and a rotary tillage mechanism installed on the installation mechanism. The installation mechanism includes an installation plate, and hydraulic devices are symmetrically arranged at the upper end of the installation plate. The rotary tillage mechanism includes an installation frame, which is located at the end of the hydraulic rod of the hydraulic device. A rotary tillage shaft is rotatably installed inside the installation frame, and rotary tillage blades are provided on the rotary tillage shaft. A fixing plate is provided at the upper end of the installation frame, and an adjusting plate is rotatably installed between the fixing plates. The starting end of the adjusting plate is rotatably connected to the hydraulic rod of the hydraulic device, and a protective cover is rotatably connected to the end of the adjusting plate. A limiting opening adapted to the size of the installation frame is provided at the upper end of the protective cover.

[0006] Preferably, a drive box is embedded in the mounting bracket, the rotary tiller passes through the drive box, and gears are provided on both the rotary tiller inside the drive box and inside the drive box. The gears that are adjacent to each other mesh with each other, and a drive spindle is provided at the rear end of the drive box.

[0007] Preferably, the rotary tiller shaft is provided with a mounting base, the mounting base has an insertion interface, and the side end of the mounting base has a mounting hole. The rotary tiller blade is inserted and fixed in the insertion interface, and the rotary tiller blade is fixed on the mounting base by bolts and nuts.

[0008] Preferably, the upper end of the mounting plate has an extension opening, the size of which is adapted to the size of the drive box, and the drive box is located inside the extension opening.

[0009] Preferably, the adjusting plate includes a first curved portion, a second curved portion, and a connecting portion in sequence along its long axis. The connection between the first curved portion and the second curved portion is a rotation axis. The connecting portion is rotatably mounted at the end of the second curved portion and is an arc-shaped portion that bends inward.

[0010] Preferably, the first curved portion bends upward in an arc shape, and the second curved portion bends downward in an arc shape, forming an S-shape. The first curved portion has an installation port at its starting end, and a limiting groove is formed on the inner wall of the installation port. A limiting slider is slidably installed in the limiting groove, and the limiting slider is rotatably connected to the hydraulic rod of the hydraulic equipment. A rubber sleeve is provided on the outer side of the first curved portion.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model effectively solves the technical problem that current devices are unable to flexibly adapt to the diverse soil tillage depth requirements of different crops through the adjustment plate and protective cover structure. When the hydraulic rod extends and retracts to adjust the tillage depth, the seesaw structure formed by the first and second curved parts of the adjustment plate will rotate accordingly. With the help of the connecting part, it can drive the protective cover and the rotary tiller blades to rise and fall in opposite directions. If the original distance between the protective cover and the rotary tiller blades is A, after the rotary tiller blades descend, the distance between the protective cover and the rotary tiller blades is A+, which allows the rotary tiller blades to penetrate deeper into the soil. This ensures that the protective cover will not restrict the tillage depth adjustment and that the protective cover is always above the soil. The limiting port at the upper end of the protective cover is compatible with the mounting frame, which not only ensures that the protective cover is always above the rotary tiller blades, effectively blocking soil, stones and other debris splashed during rotary tillage to avoid damage to operators and surrounding equipment, but also does not affect the tillage depth adjustment, improving the safety of the operation. It can meet the tillage needs of different crops and greatly improve the versatility and operating efficiency of the equipment.

[0013] 2. This utility model also utilizes a rubber sleeve structure. During rotary tillage, soil particles, straw fragments, mud, and other debris are violently thrown up by the high-speed rotating rotary blades. The dust in these particles can easily penetrate the mechanical connection points of the adjustment plate (such as the mating part between the limit groove and the limit slider). The rubber sleeve tightly wraps around the outside of the first curved part, forming a physical barrier to prevent debris from entering the gaps. This avoids the adjustment plate from getting stuck and experiencing increased wear due to the accumulation of mud and sand, ensuring the long-term stability of the linkage adjustment function of the protective cover. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0015] Figure 2 This is a front view structural diagram of the present utility model;

[0016] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 4 This is a cross-sectional view of the drive box of this utility model;

[0018] Figure 5 This is a schematic diagram of the installation mechanism structure of this utility model;

[0019] Figure 6 This is a schematic diagram of the adjusting plate structure of this utility model;

[0020] Figure 7 This is a schematic diagram of the rotary tillage shaft structure of this utility model;

[0021] Figure 8 This is a schematic diagram of the disassembly structure of the adjustment plate of this utility model.

[0022] Explanation of the numbers in the diagram: 100, Installation mechanism; 101, Mounting plate; 1011, Extension port; 102, Hydraulic equipment; 103, Adjusting plate; 1031, First curved section; 1032, Second curved section; 1033, Connecting section; 1034, Mounting port; 1035, Limiting groove; 1036, Limiting slider; 104, Protective cover; 105, Rubber sleeve; 200, Rotary tillage mechanism; 201, Mounting frame; 202, Rotary tillage shaft; 2021, Mounting base; 203, Drive box; 204, Rotary tillage blade; 205, Fixing plate. Detailed Implementation

[0023] like Figures 1 to 7As shown, this utility model relates to an adjustable tillage depth rotary tiller device, including a mounting mechanism 100 and a rotary tillage mechanism 200 mounted on the mounting mechanism 100. The mounting mechanism 100 includes a mounting plate 101, and hydraulic devices 102 are symmetrically arranged on the upper end of the mounting plate 101. The rotary tillage mechanism 200 includes a mounting frame 201, which is located at the end of the hydraulic rod of the hydraulic device 102. A rotary tillage shaft 202 is rotatably mounted inside the mounting frame 201, and rotary tillage blades are arranged on the rotary tillage shaft 202. The upper end of the mounting frame 201 is equipped with a fixed plate 205, and an adjusting plate 103 is rotatably mounted between the fixed plates 205. The beginning end of the adjusting plate 103 is rotatably connected to the hydraulic rod of the hydraulic device 102, and the end end of the adjusting plate 103 is rotatably connected to a protective cover 104. The upper end of the protective cover 104 has a limiting opening that matches the size of the mounting frame 201. The limiting opening can limit the upper and lower movement of the protective cover 104 to prevent it from shaking during operation. This utility model achieves flexible adjustment of the tillage depth of the rotary tillage blade 204 through the hydraulic device 102, without manual disassembly, adapting to the tillage depth requirements of different crops. The linkage between the adjusting plate 103 and the protective cover 104 ensures that the tillage depth adjustment is not affected while protecting the blade, improving work efficiency and safety.

[0024] Specifically, a drive housing 203 is embedded in the mounting bracket 201. The rotary tiller shaft 202 passes through the drive housing 203. Gears are installed on both the rotary tiller shaft 202 and the drive housing 203, with adjacent gears meshing with each other. A drive spindle is located at the rear end of the drive housing 203. The drive spindle is connected to the output shaft of the rotary tiller via a universal joint. The gears inside the drive housing 203 enable the rotary tiller shaft 202 to rotate at high speed, allowing for rotary tillage operations in conjunction with the rotary tiller blades 204.

[0025] Furthermore, the rotary tiller 202 is provided with a mounting base 2021. The mounting base 2021 has an insertion interface and a mounting hole at its side end. The rotary tiller blade 204 is inserted and fixed in the insertion interface, and is fixed to the mounting base 2021 by bolts and nuts. When installing the rotary tiller blade 204, it is inserted into the insertion interface of the mounting base 2021, and then the rotary tiller blade 204 can be installed and fixed by bolts and nuts. When a single rotary tiller blade 204 is damaged, it can also be easily disassembled and replaced.

[0026] It is worth noting that the upper end of the mounting plate 101 has an extension opening 1011, the size of which is adapted to the size of the drive box 203, and the drive box 203 is located inside the extension opening 1011. When the rotary tillage mechanism 200 is adjusted, the extension opening 1011 allows the drive box 203 to move up and down easily, so that the drive box 203 will not affect the adjustment of the rotary tillage depth of the rotary tillage mechanism 200.

[0027] It is worth mentioning that the adjusting plate 103 includes a first curved part 1031, a second curved part 1032 and a connecting part 1033 in sequence along the long axis. The connection between the first curved part 1031 and the second curved part 1032 is the axis of rotation. The connecting part 1033 is rotatably installed at the end of the second curved part 1032. The connecting part 1033 is an arc-shaped part that bends inward. When the hydraulic rod of the rotary tillage depth adjustment hydraulic device 102 extends, the adjustment plate 103 rotates around its axis, and the connecting part 1033 moves upward. Through the connecting part 1033, which is rotatably connected to the protective cover 104, the protective cover 104 can be pulled upward. If the original distance between the protective cover 104 and the rotary tillage blade 204 is A, after the rotary tillage blade 204 descends, the distance between the protective cover 104 and the rotary tillage blade 204 is A+, which allows the rotary tillage blade 204 to penetrate deeper into the soil. This ensures that the protective cover 104 does not restrict the tillage depth adjustment and that the protective cover 104 is always above the soil. When the rotary tillage blade 204 rotates at high speed, it violently throws soil, stones, straw, and other debris into the air. The protective cover 104 can form a physical barrier to prevent these debris from splashing in all directions. This not only avoids accidental injury to the operator or surrounding personnel but also reduces surface damage to tractors and other supporting equipment.

[0028] It is worth noting that the first curved portion 1031 bends upward in an arc shape, and the second curved portion 1032 bends downward in an arc shape. The first curved portion 1031 and the second curved portion 1032 form an S-shape. The beginning end of the first curved portion 1031 is provided with an installation port 1034. A limiting groove 1035 is provided on the inner wall of the installation port 1034. A limiting slider 1036 is slidably installed in the limiting groove 1035. The limiting slider 1036 is rotatably connected to the hydraulic rod of the hydraulic device 102. A rubber sleeve 105 is provided on the outer side of the first curved portion 1031. When the hydraulic rod of the hydraulic device 102 extends, it applies downward pressure from the beginning of the first curved part 1031, causing the adjusting plate 103 to rotate. During the rotation, the limiting slider 1036 slides in the limiting groove 1035, thereby compensating for the distance between the first curved part 1031 and the hydraulic rod. The rubber sleeve 105 is always located outside the first curved part 1031, which can prevent dust from entering during the rotary tillage process and ensure the stable use of the adjusting structure of the protective cover 104.

[0029] Working Principle: This embodiment provides an adjustable tillage depth rotary tiller device. In use, the device is installed on a rotary tiller agricultural equipment. The output shaft of the rotary tiller is connected to the drive main shaft at the rear end of the drive box 203 via a universal joint. When rotary tillage is required, the device is adjusted to the working state. When the tillage depth needs to be adjusted, the hydraulic device 102 is activated. The hydraulic rod of the hydraulic device 102 is extended or retracted according to the required tillage depth. When the hydraulic rod extends, it pushes the mounting frame 201 downwards, and the mounting frame 201 drives the rotary tillage shaft 2... 02 and the rotary tiller blades 204 move downwards synchronously, thereby increasing the depth of the rotary tiller blades 204 into the soil and increasing the tillage depth. As the hydraulic rod extends, it applies a downward force to the beginning of the adjusting plate 103, causing the adjusting plate 103 to rotate around the pivot point between the fixed plates 205. The end of the adjusting plate 103 pulls the protective cover 104 upwards. Because the limiting opening at the upper end of the protective cover 104 is compatible with the size of the mounting frame 201, the mounting frame 201 slides relative to it within the limiting opening. This ensures that the protective cover 104 remains above the rotary tiller blades 204 and does not penetrate deep into the soil along with the rotary tiller mechanism 200, thus blocking soil, stones, and other debris splashed during tillage. Simultaneously, the power of the rotary tiller is transmitted to the drive housing 203 via the drive shaft. The gears within the drive housing 203 mesh, driving the rotary tiller shaft 202 to rotate at high speed. The rotary tiller blades 204 on the rotary tiller shaft 202 rotate accordingly, cutting and breaking up the soil. When it is necessary to reduce the tillage depth, the hydraulic device 102 is controlled... When the hydraulic rod retracts, it pulls the mounting bracket 201 upward, reducing the depth of the rotary tiller blade 204 into the soil. At this time, the adjusting plate 103 rotates in the opposite direction under the pull of the hydraulic rod, and the protective cover 104 moves downward with the end of the adjusting plate 103 under its own weight, always maintaining protection for the rotary tiller blade 204. If a single rotary tiller blade 204 is damaged, the bolts and nuts on the mounting base 2021 can be unscrewed, the damaged blade can be removed from the insertion interface, a new rotary tiller blade 204 can be replaced, and then it can be re-fixed.

[0030] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A rotary tiller device with adjustable tillage depth, characterized in that, The system includes an installation mechanism (100) and a rotary tillage mechanism (200) mounted on the installation mechanism (100). The installation mechanism (100) includes an installation plate (101), and hydraulic devices (102) are symmetrically arranged at the upper end of the installation plate (101). The rotary tillage mechanism (200) includes a mounting frame (201), which is located at the end of the hydraulic rod of the hydraulic device (102). A rotary tillage shaft (202) is rotatably mounted inside the mounting frame (201). Rotary tillage blades (204) are provided on the shaft (202). A fixing plate (205) is provided at the upper end of the mounting frame (201). An adjusting plate (103) is rotatably installed between the fixing plates (205). The beginning end of the adjusting plate (103) is rotatably connected to the hydraulic rod of the hydraulic device (102). The end of the adjusting plate (103) is rotatably connected to a protective cover (104). The upper end of the protective cover (104) is provided with a limiting opening that matches the size of the mounting frame (201).

2. The rotary tiller device with adjustable tillage depth according to claim 1, characterized in that, A drive box (203) is embedded in the mounting bracket (201). The rotary tiller (202) passes through the drive box (203). Gears are provided on both the rotary tiller (202) and the drive box (203) inside the drive box (203). The adjacent gears mesh with each other. A drive spindle is provided at the rear end of the drive box (203).

3. The rotary tiller device with adjustable tillage depth according to claim 2, characterized in that, The rotary tillage shaft (202) is provided with a mounting base (2021), the mounting base (2021) has an insertion interface, and the side end of the mounting base (2021) is provided with a mounting hole. The rotary tillage blade (204) is inserted and fixed in the insertion interface, and the rotary tillage blade (204) is fixed on the mounting base (2021) by bolts and nuts.

4. The rotary tiller device with adjustable tillage depth according to claim 3, characterized in that, The upper end of the mounting plate (101) is provided with an extension opening (1011), the size of which is adapted to the size of the drive box (203), and the drive box (203) is located inside the extension opening (1011).

5. The rotary tiller device with adjustable tillage depth according to claim 4, characterized in that, The adjusting plate (103) includes a first curved portion (1031), a second curved portion (1032), and a connecting portion (1033) in sequence along its long axis. The connection between the first curved portion (1031) and the second curved portion (1032) is a rotation axis. The connecting portion (1033) is rotatably mounted on the end of the second curved portion (1032). The connecting portion (1033) is an arc-shaped part that bends inward.

6. The rotary tiller device with adjustable tillage depth according to claim 5, characterized in that, The first curved portion (1031) bends upward in an arc shape, and the second curved portion (1032) bends downward in an arc shape. The first curved portion (1031) and the second curved portion (1032) form an S-shape. The first curved portion (1031) has an installation port (1034) at its starting end. The inner wall of the installation port (1034) has a limiting groove (1035). A limiting slider (1036) is slidably installed in the limiting groove (1035). The limiting slider (1036) is rotatably connected to the hydraulic rod of the hydraulic device (102). A rubber sleeve (105) is provided on the outer side of the first curved portion (1031).

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