A rotary blade for paddy fields

Abstract

This utility model discloses a rotary tillage blade for paddy fields, comprising a blade body and symmetrically arranged side wings. The blade body and side wings are integrally formed. The blade body includes a first tillage plate and a second tillage plate. One side of the first tillage plate is connected to one side of the second tillage plate and symmetrically arranged to form a groove. One end of the first tillage plate and the second tillage plate is the connecting end, and the other end is the blade tip. Side wings extend from the first tillage plate and the second tillage plate to both sides of the blade body. The width of the first tillage plate and the second tillage plate gradually increases from the blade tip to the side wings, forming a symmetrical arc-shaped blade between the side wings and the blade tip. By extending the side wing structure from the first tillage plate and the second tillage plate, and using double blades to form a blade body with a groove structure, the tillage efficiency is greatly improved compared to a single blade structure, enabling high-efficiency tillage. At the same time, the side wings increase the contact area of ​​the blade body, preventing local sinking, making it suitable for paddy field cultivation.

Description

Technical Field

[0001] This utility model relates to the field of rotary tillage blade technology, and more specifically to a rotary tillage blade for paddy fields. Background Technology

[0002] Rotary tillage blades are the key working components of small rotary tillers. Their main function is to loosen and till the soil, break up the plow pan, restore the soil's granular structure, and improve the soil's water retention capacity. Existing rotary tillage blades are generally divided into two types: one for paddy fields and the other for dry land. In actual use, due to different soil structures, the requirements for rotary tillage blades are different. Hard soils require high soil breaking performance, while soft and irrigated soils require blades that do not easily sink during operation and have high soil turning performance.

[0003] Existing rotary tillers for dry land are suitable for use in paddy fields. They can efficiently break up soil, producing fine particles that significantly improve soil looseness and water retention. However, during operation, the heavy blades can easily sink into the paddy field, requiring external force to keep the rotary tillers at a suitable tillage depth so that they can disperse the soil.

[0004] While rotary tillers for paddy fields, with their anti-sinking structures, are less prone to sinking, practical applications have revealed poor soil fragmentation, leading to decreased soil water retention and necessitating frequent irrigation to maintain soil moisture, significantly increasing water costs. For example, patent CN 103918364 A discloses a rotary tiller for loose soil, comprising a mounting cylinder and an outer cylinder. The larger outer cylinder hinders its sinking into the soil, thus limiting the tilling depth. Multiple rotary blades are arranged radially on the outer wall of the outer cylinder. Existing rotary tillers for paddy fields primarily rely on anti-sinking structures to prevent sinking, resulting in complex overall structures that increase manufacturing difficulty and cost. Utility Model Content

[0005] The main purpose of this invention is to provide a rotary tiller for paddy fields that can prevent the rotary tiller from sinking while ensuring its soil-breaking ability and guaranteeing a smooth rotary tillage.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A rotary tillage blade for paddy fields includes a blade body and symmetrically arranged side wings. The blade body and side wings are integrally formed. The blade body includes a first tillage plate and a second tillage plate. One side of the first tillage plate is connected to one side of the second tillage plate and symmetrically arranged to form a groove. The connection between the first tillage plate and the second tillage plate is the back of the blade. One side of the first tillage plate and the second tillage plate is the connecting end, and the other side is the blade tip. The side wings extend from the first tillage plate and the second tillage plate to both sides of the blade body. The side wings smoothly transition with the first tillage plate and the second tillage plate. The width of the first tillage plate and the second tillage plate gradually increases from the blade tip to the side wings, forming a symmetrical arc-shaped blade between the side wings and the blade tip.

[0008] Furthermore, the groove formed by the first turning plate and the second turning plate is V-shaped.

[0009] Furthermore, the first and second soil-turning plates are bent towards the back of the blade to form an arc-shaped blade.

[0010] Furthermore, the side wings are rectangular, and the long sides of the two symmetrical side wings are respectively set on the first soil turning plate and the second soil turning plate. The length of the long side wing is not less than 1 / 3 of the length of the first soil turning plate or the second soil turning plate.

[0011] Furthermore, the width of the side wing is not less than the width of the first soil-turning plate or the second soil-turning plate.

[0012] Furthermore, an intercepting protrusion is provided on the side wing, the intercepting protrusion being located on the side wing away from the blade body and close to the blade tip.

[0013] Furthermore, the intercepting protrusion and the side wing are integrally formed into a single structure.

[0014] Furthermore, the connecting end of the first soil-turning plate and the second soil-turning plate is an arc-shaped groove.

[0015] The beneficial effects of this utility model are:

[0016] 1. This rotary tiller consists of a first tilling plate and a second tilling plate forming a blade body with a groove structure. The continuous groove structure of the blade body greatly improves tilling efficiency compared to a single blade structure, enabling high-efficiency tilling. It does not trap soil during paddy field cultivation, breaks up the soil finely, and significantly improves soil looseness and water retention.

[0017] 2. By extending side wing structures from the first and second soil-turning plates, the side wings increase the ground contact area of ​​the cutter body, reduce the pressure of the silt layer, disperse the pressure on the cutter body, avoid local sinking, and allow it to escape autonomously without external traction; on the other hand, the side wings generate a fluid restoring force opposite to the direction of offset during rotation, suppressing the lateral sway of the cutter shaft and improving the stability of the cutter body.

[0018] 3. The first and second turning plates of this rotary tiller are curved towards the back of the blade, forming an arc-shaped back. Simultaneously, a symmetrical arc-shaped cutting edge is formed between the side wings and the tip, resulting in an overall arc-shaped structure for the blade. Due to its "bow-shaped bearing" characteristic, the arc-shaped back decomposes the vertical impact force generated by soil resistance when the blade cuts into the soil into tangential and axial components, converting the load from point stress to line stress and transmitting it along the curvature gradient, significantly reducing the stress peak. The arc-shaped cutting edge, located at the tip, is the primary cutting point, making the cutting process more gradual and dispersing the cutting resistance into tangential (tillage) and radial (stabilizing) components, reducing localized impact. The combined design of the arc-shaped back and cutting edge significantly improves the stability and fracture resistance of the blade by optimizing stress distribution, enhancing structural bending stiffness, and reducing stress concentration.

[0019] 4. Interception protrusions are set on the side wings. These protrusions intercept weeds that cannot be cut off, preventing them from moving to the connection point and thus forming weed entanglement. They have strong anti-entanglement capabilities and ensure cultivation depth. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is one of the three-dimensional structural schematic diagrams of a rotary tiller blade for paddy fields provided as an embodiment of the present utility model.

[0022] Figure 2 This is the second three-dimensional structural schematic diagram of a rotary tiller blade for paddy fields, provided as an embodiment of the present utility model.

[0023] Figure 3 This is a three-dimensional structural diagram of a rotary tillage blade for paddy fields, provided as another embodiment of the present invention.

[0024] Figure 4 A top view of a rotary tiller blade for paddy fields, provided as another embodiment of this utility model.

[0025] In the diagram: 1. Blade body; 11. First soil-turning plate; 12. Second soil-turning plate; 13. Back of blade; 14. Blade tip; 15. Connecting end; 16. Blade edge; 2. Side wing; 3. Intercepting protrusion. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] like Figure 1 As shown, this utility model provides a rotary tillage blade for paddy fields, including a blade body 1 and symmetrically arranged side wings 2. The blade body 1 and the side wings 2 are integrally formed. The blade body 1 includes a first turning plate 11 and a second turning plate 12. One side of the first turning plate 11 is connected to one side of the second turning plate 12 and is symmetrically arranged to form a groove. The connection between the first turning plate 11 and the second turning plate 12 is the back of the blade 13. One side of the first turning plate 11 and the second turning plate 12 is the connecting end 15, and the other side is the blade tip 14. Side wings 2 extend from the first turning plate 11 and the second turning plate 12 to both sides of the blade body 1. The side wings 2 smoothly transition with the first turning plate 11 and the second turning plate 12. The width of the first turning plate 11 and the second turning plate 12 gradually increases from the blade tip 14 to the side wings 2. A symmetrical arc-shaped blade 16 is formed between the side wings 2 and the blade tip 14.

[0031] To address the problems existing in existing rotary tillers, this rotary tiller has been structurally improved. This rotary tiller consists of a first turning plate 11 and a second turning plate 12 forming a blade body 1 with a groove structure. The blade body 1 has a continuous groove structure, which greatly improves the turning efficiency compared to the single blade structure. It can achieve high-efficiency turning, and will not trap soil during paddy field cultivation. It breaks up the soil finely and significantly improves the looseness and water retention of the soil.

[0032] By extending side wings 2 onto the first soil-turning plate 11 and the second soil-turning plate 12, the side wings 2 increase the ground contact area of ​​the cutter body 1, reduce the pressure of the silt layer, disperse the pressure of the cutter body 1, avoid local sinking, and allow it to escape autonomously without external traction; on the other hand, the side wings 1 generate a fluid restoring force opposite to the direction of offset during rotation, suppressing the lateral sway of the cutter shaft and improving the stability of the cutter body 1.

[0033] The width of the first tillage plate 11 and the second tillage plate 12 gradually increases from the tip 14 to the side wing 2, forming a symmetrical arc-shaped blade between the side wing 2 and the tip 12. During rotary tillage, the tip 14 first contacts the soil, so its width is the smallest, thus ensuring the effectiveness and efficiency of breaking the soil. Secondly, the gradually widening arc-shaped blade between the tip 14 and the side wing 2 gradually refines large clumps of soil and turns the soil outward along its outer surface, dividing the soil into three layers: the bottom layer is coarse, the middle layer is finer, and the top layer is the finest (because this type of soil is most suitable for crop growth and saves the most fertilizer), increasing the breaking area and improving the tillage efficiency.

[0034] Meanwhile, in order to improve the overall stability of this rotary tiller, the blade body 1 and the side wings 2 are integrally formed into a single structure, eliminating the connecting parts (bolts / welding materials), eliminating the risk of fatigue fracture caused by the heat-affected zone of welding or bolt holes, reducing the overall weight of the rotary tiller, and the side wings 2 smoothly transition with the first turning plate 11 and the second turning plate 12, reducing the resistance to mud and water flow.

[0035] like Figure 2 As shown, in order to achieve efficient soil breaking, in this embodiment, the groove formed by the first soil turning plate 11 and the second soil turning plate 12 is V-shaped. Since the blade has a continuous V-shaped groove structure, after the soil enters the V-shaped groove, it is constrained by the side wall to form a spiral vortex, which greatly improves the soil breaking capacity.

[0036] like Figure 1 As shown, in this embodiment, the first turning plate 11 and the second turning plate 12 are bent toward the back of the blade 13 to form an arc-shaped back of the blade 13.

[0037] In this embodiment, the first turning plate 11 and the second turning plate 12 of the rotary tiller are bent towards the back of the blade 13, forming an arc-shaped back of the blade 13. At the same time, a symmetrical arc-shaped blade 16 is formed between the side wing 2 and the tip 14, that is, the blade body 1 has an overall arc-shaped structure. Due to its "bow-shaped pressure bearing" characteristic, when the blade body 1 cuts into the soil, the soil resistance will form a vertical impact force. The arc-shaped structure can decompose this into tangential and axial components, converting the load from point stress to line stress, which is transmitted along the curvature gradient, greatly reducing the stress peak. The arc-shaped blade 16 is located at the tip 14, which is the main soil cutting part, making the process of cutting into the soil more gradual, dispersing the cutting resistance into tangential components (tillage) and radial components (stabilizing support), reducing local impact. The combined design of the arc-shaped back of the blade 13 and the arc-shaped blade 16 significantly improves the stability and fracture resistance of the blade body by optimizing stress distribution, enhancing structural bending stiffness, and reducing stress concentration.

[0038] To prevent the rotary tiller blades from sinking during paddy field operations, symmetrical side wings 2 extend from the blade body 1, effectively increasing the contact area between the blades and the ground. This prevents the blades from sinking. Common shapes for these side wings include triangles, trapezoids, rectangles, ellipses, and fan shapes. In this embodiment, for example... Figure 2 As shown, the side wings 2 are rectangular, and the long sides of the two symmetrical side wings 2 are respectively set on the first soil turning plate 11 and the second soil turning plate 12. The length of the long side of the side wings 2 is not less than 1 / 3 of the length of the first soil turning plate 11 or the second soil turning plate 12.

[0039] In this embodiment, the side wing 2 is rectangular. Under the same size constraint, the rectangle provides the largest projected area, reduces the ground pressure, and significantly improves the anti-sinking ability of the rotary tiller blade. The bending section modulus of the rectangular flat plate structure is significantly higher than that of curved surfaces or grids, and the ultimate load bearing capacity is high. It is especially suitable for hard paddy fields containing gravel and tree roots. At the same time, the large-area flat plate suppresses the high-frequency vibration of the blade body 1, reduces the amplitude, and extends the bearing life.

[0040] From a processing perspective, the straight edges of the rectangular side wings 2 are easy to laser cut or stamp, which greatly reduces the processing cost of the rotary tiller blades.

[0041] In order to improve the buoyancy of the side wing 2, in this embodiment, the side wing 2 is widened. Specifically, the width of the side wing 2 is not less than the width of the first soil turning plate 11 or the second soil turning plate 12.

[0042] In order to improve the ability of rotary tillers to prevent grass from getting tangled, in this embodiment, an intercepting protrusion 3 is provided on the side wing 2. The intercepting protrusion 3 is located on the side wing 2 away from the blade body 1 and close to the blade tip 14.

[0043] In this embodiment, interception protrusions are provided on the side wings. These protrusions intercept weeds that cannot be cut off, preventing them from moving to the connecting part and thus forming entanglement. The anti-entanglement ability is strong, ensuring the tillage depth.

[0044] To improve the stability of the interception protrusion, the interception protrusion 3 and the side wing 2 are integrally formed into a single structure.

[0045] In use, the connecting end 15 is welded to the corresponding connecting shaft. The rotary tillers are evenly distributed 360° around the circumference of the connecting shaft, and the axial spacing between adjacent blades 3 is equal. The line connecting the rotary tillers forms a single helix. Since the connecting shaft is usually a hexagonal shaft, in order to make the connecting end 15 fit the connecting shaft better, in this embodiment, the connecting end 15 of the first tilling plate 11 and the second tilling plate 12 is an arc-shaped groove.

[0046] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A rotary tillage blade for paddy fields, characterized in that: The device includes a blade body (1) and symmetrically arranged side wings (2). The blade body (1) and side wings (2) are integrally formed. The blade body (1) includes a first soil-turning plate (11) and a second soil-turning plate (12). One side of the first soil-turning plate (11) is connected to one side of the second soil-turning plate (12) and they are symmetrically arranged to form a groove. The connection between the first soil-turning plate (11) and the second soil-turning plate (12) is the blade back (13). One side of the first soil-turning plate (11) and the second soil-turning plate (12) is a connecting side. The other side of the end (15) is the tip (14), and the side wings (2) extend from the first soil turning plate (11) and the second soil turning plate (12) to both sides of the blade body (1). The side wings (2) smoothly transition with the first soil turning plate (11) and the second soil turning plate (12). The width of the first soil turning plate (11) and the second soil turning plate (12) gradually increases from the tip (14) to the side wings (2), forming a symmetrical arc-shaped blade (16) between the side wings (2) and the tip (14).

2. A rotary tillage blade for paddy fields according to claim 1, characterized in that, The groove formed by the first turning plate (11) and the second turning plate (12) is V-shaped.

3. A rotary tillage blade for paddy fields according to claim 1, characterized in that, The first turning plate (11) and the second turning plate (12) are bent toward the back of the blade (13) to form an arc-shaped back of the blade (13).

4. A rotary tillage blade for paddy fields according to claim 1, characterized in that, The side wing (2) is rectangular, and the long sides of the two symmetrical side wings (2) are respectively set on the first soil turning plate (11) and the second soil turning plate (12). The length of the long side of the side wing (2) is not less than 1 / 3 of the length of the first soil turning plate (11) or the second soil turning plate (12).

5. A rotary tillage blade for paddy fields according to claim 4, characterized in that, The width of the side wing (2) is not less than the width of the first soil turning plate (11) or the second soil turning plate (12).

6. A rotary tillage blade for paddy fields according to claim 1, characterized in that, An interception protrusion (3) is provided on the side wing (2), the interception protrusion (3) being located on the side wing (2) away from the blade body (1) and close to the blade tip (14).

7. A rotary tillage blade for paddy fields according to claim 6, characterized in that, The intercepting protrusion (3) and the side wing (2) are integrally formed into a single structure.

8. A rotary tillage blade for paddy fields according to claim 1, characterized in that, The connecting end (15) of the first soil turning plate (11) and the second soil turning plate (12) is an arc-shaped groove.

Images