Variable-tilling-depth flow guide type rotary cultivator for dry farming tobacco field

Abstract

The utility model discloses a variable tilling depth flow guide type rotary cultivator for a dry farming tobacco field, which belongs to the technical field of agricultural tilling machinery and comprises a main beam, a soil retaining cover is arranged on the main beam, a gear box is connected above the soil retaining cover, a transmission box is connected below the soil retaining cover, the transmission box is in transmission connection with the gear box, and the transmission box is in transmission connection with the gear box. The transmission case is connected with a main shaft, the main shaft is provided with rotary tillage blades, the rotary tillage blades are distributed in a periodic double-spiral line mode, concave tillage rows can be formed through the rotary tillage blades distributed in the double-spiral line mode, rainwater can be guided to flow into roots of crops, and meanwhile power loss during operation is reduced through non-equal-depth tillage. The rotary cultivator adapts to flow guide and rainfall collection in an arid region to meet the multi-row planting requirement, and the technical problems that an existing rotary cultivator cannot form periodic gradually-changed soil loosening rows, and a rainwater flow guide mechanism for unloosened soil walls is lacked are solved.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural tillage machinery technology, specifically relating to a variable-depth rotary tiller for dryland tobacco fields. Background Technology

[0002] Rotary tillers are mainly used in combined tillage operations for tobacco fields in arid and semi-arid agricultural areas, such as tobacco straw return to the field: a tractor pulls a rotary tiller to cut into the soil, the blades crush the straw and mix it into the soil, and the soil layer is compacted by the rear-mounted compaction wheel at the same time; the pretreatment of ridge planting is a compound operation, such as the rotary tiller and the ridging device are used together to complete the soil crushing, ridging and compaction processes in one go.

[0003] However, existing rotary tillers have the following problems: 1) Low efficiency of secondary operation: The tobacco field needs to be rotary tilled to the same depth before manual or mechanical ridging, which prolongs the operation cycle and increases power consumption; 2) Insufficient rainwater diversion: When planting with equal depth rotary tillage and ridging, rainwater will run off along the ridge surface and cannot be fully supplied to the crop roots; 3) Low transmission efficiency: The traditional side-mounted transmission box has a complex structure, the cutter shaft is easy to be damaged, and the maintenance cost is high.

[0004] Chinese patent CN201869530U discloses a rotary tiller, ditcher, ridging, weeding, and seed covering machine. It uses a rotary tiller roller for tilling, a ditcher for ditching, and an auger to break up the soil and spread it onto the crop planting strip, achieving rotary tilling, ditching, weed burial, and seed covering in one operation. However, this mechanism still has the following drawbacks: the blade length is fixed, making it impossible to create periodically varying loose soil rows, and it lacks a rainwater diversion mechanism for the unloosened soil walls. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a variable-depth rotary tiller for dryland tobacco fields, so as to solve the technical problems that existing rotary tillers cannot form periodic gradual loosening rows and lack a rainwater diversion mechanism for the unloosened soil walls.

[0006] To solve the above problems, this utility model achieves this through the following technical solution:

[0007] This utility model provides a variable-depth rotary tiller for dryland tobacco fields, including a main beam, a soil retaining cover on the main beam, a gearbox connected above the soil retaining cover, a transmission box connected below the soil retaining cover, an input end of the gearbox connected to a power source, an output end of the gearbox connected to the input end of the transmission box, a main shaft connected to the transmission box, and rotary tillage blades mounted on the main shaft. The rotary tillage blades are arranged in a periodic double helix pattern, and the length of the rotary tillage blades increases gradually from both ends to the middle.

[0008] Preferably, the length of the rotary tiller blades increases in a gradient of 5-35 cm from both ends toward the middle.

[0009] Preferably, a plow is connected to the transmission box, and the plow is positioned at the center of the rotary tillage blades.

[0010] Preferably, the working end of the plow is triangular.

[0011] Preferably, the plowshare is bolted to the housing of the transmission box.

[0012] Preferably, the depth of the plow is consistent with the longest length of the rotary tillage blades.

[0013] Preferably, a leveling chuck is connected to the side of the retaining cover away from the rotary tillage blade.

[0014] Preferably, the rotary tillage blades are connected to the main shaft via a blade holder.

[0015] More preferably, the knife holder is a hollow square tube.

[0016] Preferably, the rotary tillage blade is fixed to the blade holder by bolts.

[0017] Preferably, a slot is provided at the top of the tool holder, and the tool holder is engaged with the spindle through the slot. A round hole is provided at the bottom of the tool holder.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This invention provides a variable-depth rotary tiller for dryland tobacco fields, an improved design suitable for ridge-planting tobacco fields in dryland farming areas. By installing rotary blades arranged in a periodic double-helix pattern on the main shaft, symmetrically positioned, the two helices alternately cut into the soil, evenly distributing cutting resistance to both sides of the main shaft. This ensures uniform soil cutting force distribution, avoiding the periodic vibrations caused by a single-helix layout. This achieves periodic, gradual soil loosening and creates a concave tillage layer, forming a natural flow channel that guides rainwater to the bottom of the groove, improving rainwater utilization and increasing crop yield per acre. The crop rows are located at the center line of the groove, enabling precise water supply. The double-helix phase difference design counteracts centrifugal force, significantly reducing rotor vibration and power loss. The actual tillage layer is reduced compared to traditional rotary tillers, thus reducing power consumption. A soil retainer works in conjunction to control the soil-throwing range of the rotary blades, reducing soil splashing. Power is transmitted to the main shaft via the gearbox and intermediate transmission box, driving the rotary blades to rotate and complete the rotary tillage action.

[0020] Furthermore, the rotary tiller blades are arranged in a gradient pattern from both ends towards the middle. Compared to blades with uniform depth, this gradient blade layout reduces the amount of tillage required. The cross-sectional shape of the loosened soil layer in the tillage area forms a gradually changing concave drainage channel through alternating deep and shallow tillage layers. Combined with the periodic deformation of the rotary tiller blades, this achieves both water diversion and energy conservation.

[0021] Furthermore, the blade length is limited to 5-35cm, with the 5cm shallow tillage zone retaining a firm soil drainage layer, and the 35cm deep tillage zone meeting the growth needs of the tobacco taproot.

[0022] Furthermore, a plow is precisely positioned at the center of the transmission box connection to precisely fill the gaps, working in conjunction with a gradient arrangement of rotary tiller blades. This solves the problem of missed tillage in the central transmission box area of ​​traditional rotary tillers, ensuring that the entire concave tillage layer is loosened. This allows for rotary tillage, stubble removal, and the formation of drainage grooves in a single operation, significantly reducing operating costs and improving rainwater utilization efficiency. The plow's positioning reduces the rate of missed tillage in the central area of ​​traditional rotary tillers due to transmission box obstruction. The plow forms a centerline groove, which, together with the concave tillage layer formed by the rotary tiller blades on both sides, constitutes a "W-shaped" drainage network, increasing the speed of rainwater collection. While the surface soil is tilled and stubble removed, the varying depths within the tillage layer allow rainwater to seep in and flow along the firm plowshare surface towards the bottom of the tillage layer, guiding the rainwater to collect at the crop roots. This utility model uses a periodic blade length gradient layout and a middle plow to fill in and loosen the soil, completing rotary tillage, stubble removal, and soil loosening and shaping in one operation, achieving directional rainwater flow, energy saving and consumption reduction, and efficient tillage.

[0023] Furthermore, the working end of the plow is triangular, which reduces traction resistance.

[0024] Furthermore, the plow is bolted to the transmission housing, facilitating the replacement of the plow.

[0025] Furthermore, the depth of the moldboard plow matches the maximum length of the rotary tiller blades, ensuring well-formed furrows and high vertical water penetration. This avoids the "water-blocking dam" effect created by shallow tillage zones in traditional models, ensuring the bottom of the concave tillage layer is unobstructed. The maximum tillage depth of the moldboard plow and rotary tiller blades is synchronized, preventing localized soil compaction caused by depth differences.

[0026] Furthermore, the retaining cover is connected to the leveling slab, which enables the "concave tillage layer and level ridge surface" to be formed simultaneously, reducing the error in ridge height; the leveling slab compacts the tillage layer to form a dense layer on the surface of the tillage layer, reducing the rate of water evaporation loss.

[0027] Furthermore, the rotary tiller blades are fixed by a blade holder and bolts. The blade holder improves the bending strength of the rotary tiller blades, and the bolts make it easier to replace the rotary tiller blades.

[0028] Furthermore, the blade holder is engaged with the main shaft via a slot, making the blade holder more stable. The round hole is used for bolts to fix the rotary tiller blades, which facilitates the installation and removal of the rotary tiller blades. Attached Figure Description

[0029] Figure 1 This is a side view of the rotary tiller of this utility model;

[0030] Figure 2 This is a layout diagram of the rotary tiller blade of this utility model;

[0031] Figure 3 This is a schematic diagram of the tillage section of this utility model;

[0032] Figure 4 This is a structural diagram of the tool holder of this utility model;

[0033] Among them, 1-leveling slide; 2-soil retaining cover; 3-transmission box; 4-gearbox; 5-suspension frame; 6-main beam; 7-rotary tillage blade; 8-blade holder; 9-main shaft; 10-plow; 11-slot; 12-round hole. Detailed Implementation

[0034] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0035] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0036] The present invention will now be described in further detail with reference to the accompanying drawings:

[0037] Example 1

[0038] like Figure 1 and Figure 2 As shown, a dryland tobacco field variable-depth guiding rotary tiller includes a main beam 6, a soil retaining cover 2 is provided on the main beam 6, a gearbox 4 is connected above the soil retaining cover 2, and a transmission box 3 is connected below the soil retaining cover 2. The input end of the gearbox 4 is connected to a power source, and the output end of the gearbox 4 is connected to the input end of the transmission box 3. A main shaft 9 is connected to the transmission box 3, and rotary tillage blades 7 are installed on the main shaft 9. The rotary tillage blades 7 are distributed in a periodic double helix pattern, and the length of the rotary tillage blades 7 increases gradually from both ends to the middle.

[0039] More preferably, the input end of the gearbox 4 is connected to the power output shaft of the tractor via a universal joint.

[0040] Preferably, the length of the rotary tiller blade 7 increases gradually from both ends toward the middle in a gradient of 5-35cm.

[0041] Preferably, a plow 10 is connected to the transmission box 3, and the plow 10 is positioned at the center of the rotary tillage blades 7.

[0042] Preferably, the working end of the plow 10 is triangular in shape.

[0043] Preferably, the plow 10 is bolted to the housing of the transmission box 3.

[0044] Preferably, the depth of the plow 10 is consistent with the longest length of the rotary tillage blade 7.

[0045] Preferably, a leveling plate 1 is connected to the side of the retaining cover 2 away from the rotary tillage blade 7.

[0046] Preferably, the rotary tillage blade 7 is connected to the main shaft 9 via a blade holder 8.

[0047] Preferably, the rotary tillage blade 7 is fixed to the blade holder 8 by bolts.

[0048] like Figure 4 As shown, a slot 11 is provided at the top of the tool holder 8, and the tool holder 8 is engaged with the spindle 9 through the slot 11. A round hole 12 is provided at the bottom of the tool holder 8 for fixing bolts.

[0049] In this invention, the length of the rotary tiller blade 7 gradually increases from the left end to the middle plow 10 to the maximum value, and then symmetrically decreases to the right end, forming a gradient layout with at least one cycle. This gradient layout can be extended to multiple cycles.

[0050] Taking a three-cycle rotary tiller as an example:

[0051] 1) Parameters of spindle 9:

[0052] The spindle 9 has a diameter of 100mm and a length of 1.8m, and is divided into 3 cycles (0.6m per cycle);

[0053] The length gradient of the rotary tiller blade 7 is symmetrically distributed as follows: 5cm at the left end → 35cm at the deepest point on the left → 5cm at the middle of the left → 35cm at the plowshare → 5cm at the middle of the right → 35cm at the deepest point on the right → 5cm at the right end;

[0054] The depth of the plowshare 10 is 35cm, the same as the longest rotary tiller blade 7.

[0055] With the above parameters set, the bottom depth of the groove after three-cycle rotary tilling is 35cm, the depth of the shallow tilling area on both sides is 5cm, and the soil loosening depth of the middle plowing 10 filling area is 35cm, with no missed tilling.

[0056] The working principle of this rotary tiller:

[0057] During operation, the input power enters the gearbox 4 for reduction before being transmitted to the transmission box 3. The transmission box 3 outputs power to drive the main shaft 9, the cutter holder 8, and the rotary tiller blades 7 to rotate. The soil clods cut by the rotary tiller blades 7 are thrown backward and fall after hitting the soil retainer 2. Under the drag of the leveling drag plate 1, the falling soil clods are leveled and further broken up, achieving the effect of loosening the soil. Due to the periodic change in the length of the rotary tiller blades 7 along the main shaft 9, the depth of the underground rotary tillage layer along the main shaft 9 varies according to the length pattern of the rotary tiller blades 7 on the main shaft 9, forming an underground layer as shown in the figure. Figure 3 The rotary tillage layer shows the periodic changes in tillage depth.

[0058] The above content is only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed in this utility model shall fall within the scope of protection of the claims of this utility model.

Claims

1. A dry land tobacco field variable depth flow guiding rotary cultivator, characterized in that, Includes a main beam (6), on which a retaining cover (2) is provided, a gearbox (4) is connected above the retaining cover (2), and a transmission box (3) is connected below the retaining cover (2). The input end of the gearbox (4) is connected to a power source, and the output end of the gearbox (4) is connected to the input end of the transmission box (3). A main shaft (9) is connected to the transmission box (3), and rotary tillage blades (7) are installed on the main shaft (9). The rotary tillage blades (7) are arranged in a periodic double helix pattern, and the length of the rotary tillage blades (7) increases gradually from both ends to the middle.

2. The variable depth flow guiding rotary cultivator for dryland tobacco field according to claim 1, characterized in that, The length of the rotary tillage blade (7) increases gradually from both ends to the middle in a gradient of 5-35cm.

3. The variable depth flow guiding rotary cultivator for dryland tobacco field according to claim 1, characterized in that, A plow (10) is connected to the transmission box (3), and the plow (10) is located at the center of the rotary tillage blade (7).

4. The variable depth flow guiding rotary cultivator for dryland tobacco field according to claim 3, characterized in that, The working end of the plow (10) is triangular.

5. The variable depth flow guiding rotary cultivator for dryland tobacco field according to claim 3, characterized in that, The plow (10) is bolted to the housing of the transmission box (3).

6. The variable depth flow guiding rotary cultivator for dryland tobacco field according to claim 4, characterized in that, The depth of the plow (10) is consistent with the longest length of the rotary tillage blade (7).

7. A variable-depth rotary tiller for dryland tobacco fields according to claim 1, characterized in that, A leveling chuck (1) is connected to the side of the retaining cover (2) away from the rotary tillage blade (7).

8. The variable depth flow guiding rotary cultivator for dryland tobacco field according to claim 1, characterized in that, The rotary tillage blade (7) is connected to the main shaft (9) via the blade holder (8).

9. The variable depth flow guiding rotary cultivator for dryland tobacco field according to claim 8, characterized in that, The rotary tillage blade (7) is fixed to the blade holder (8) by bolts.

10. The variable depth flow guiding rotary cultivator for dryland tobacco field according to claim 8, characterized in that, The tool holder (8) has a slot (11) at its top end, and the tool holder (8) is engaged with the spindle (9) through the slot (11). The tool holder (8) has a round hole (12) at its bottom end.

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