Turnover-cutting curved surface combined plough

Abstract

The invention relates to a turning and cutting curved surface combined plow, which is characterized in that a turning and upturning plow body is rotated to remove part of edge materials to form a disc with a notch for cutting off stubbles and crop residual stalks. The plow column is adjustably connected with the mounting seat through a bolt, and the mounting seat is fixed with the plow frame through a U-shaped buckle. During operation, the plough share firstly cuts and lifts upturned soil, the upturned soil is conveyed to the rotary upturned soil turning plough body through the plough share, the rotary upturned soil turning plough body rotates under the driving of the friction force of the upturned soil, the upturned soil rotates, turns over and falls back along with the rotary upturned soil turning plough body, crushing and turning over of the upturned soil are achieved, and turning over and stubble burying operation is completed. By means of the combined structure of the plough share and the rotary upturned soil plough body, on the basis that the stable soil penetrating and upturned soil turning effects are guaranteed, sliding friction between the plough body and upturned soil is partially converted into rolling friction, the tillage resistance and energy consumption are fundamentally reduced, the soil tillage efficiency and quality are improved, and the rotary upturned soil plough is particularly suitable for the working condition of high stubble sticky heavy soil.

Description

Technical Field

[0001] This invention relates to the field of agricultural tillage machinery technology, specifically a plow with a combined turning and cutting curved surface. Background Technology

[0002] Soil tillage is an indispensable basic operation in agricultural production, playing a crucial role in improving soil structure and regulating the farmland ecological environment. This operation effectively breaks up the plow pan, loosens the soil, enhances soil aeration and water retention capacity, and creates favorable conditions for crop root growth. Simultaneously, turning over the clods buries surface residues, weeds, and pest carriers deeper, reducing pest and disease breeding. However, traditional moldboard plowing relies primarily on the curved surface of the plow body cutting, lifting, and turning over the clods. The continuous surface contact and sliding friction between the plow body and the soil, especially in heavy, compacted soils, leads to a large contact area and strong adsorption, resulting in significantly increased tillage resistance and energy consumption. This places higher demands on the tractor's power system, impacting operational efficiency and economy. Reducing the tillage resistance of the plow body has always been a key focus and challenge in plow design. For example, designing the complete plow body's curved surface as a grid shape reduces frictional resistance by decreasing the contact area; while using biomimetic principles and drawing inspiration from the surface morphology of organisms to design a non-smooth plow surface can reduce sticking under certain conditions, its irregular curved surface still easily attracts soil in wet soil environments, affecting the quality of operation and increasing production costs. Currently, there is still a lack of tillage equipment that can reduce tillage resistance from a mechanistic perspective while ensuring stable tillage depth and good soil penetration. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a combined plow with a turning and cutting surface that offers better turning effect, better soil penetration, stable tillage depth, lower working resistance, and is less prone to clogging.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A combined plow with a curved surface includes a plowstock, a rotating plow body, a plowshare, and plow side plates. The rotating plow body is a concave disc shape, with its back center mounted on the plowstock via a pivot. Multiple arc-shaped notches are evenly distributed along the edge of the rotating plow body. The rotating surface of the rotating plow body forms an angle β with the vertical direction and an angle α with the horizontal forward direction. β ranges from 10° to 14°, and α ranges from 35° to 50°. A plowshare is positioned below the front end of the rotating plow body, smoothly transitioning tangentially to the rotating plow body, with a free gap between them allowing the rotating plow body to rotatably. The front end of the plowshare is pointed, and its rear side is fixed to the plowstock via the plow side plates.

[0006] Furthermore, the edges of the notches on the rotating plow body are ground to form sharp cutting edges.

[0007] Furthermore, the rotating plow body surface is formed by rotating and scanning a first circular arc along the central axis, and the curve equation of the first circular arc is:

[0008]

[0009]

[0010] Among them, parameters The range of values ​​for is: Its corresponding chord length is 400mm.

[0011] Furthermore, the curved surface of the plowshare is formed by scanning and cutting with a second circular arc, specifically through the following steps:

[0012] The starting point of the second arc coincides with the ending point of the first arc, and the two arcs are tangent at this connection point; the radius of the second arc changes with the progress of the first arc, and the radius of the first arc increases with the increase of its radian angle. The radius of the second arc increases accordingly. Its curve equation is:

[0013]

[0014]

[0015] in, The second circular arc process parameters are associated with the first circular arc process. The second circular arc is formed by rotating and scanning along the central axis of the rotating plow body to create the plowshare surface.

[0016] Based on the tillage width (L) and tillage depth (H), the orthographic projection profile of the plowshare is designed on one side of the orthographic projection of the rotary plow body. The orthographic projection profile of the plowshare is then cut along the forward direction of the combined plow body to obtain the plowshare surface.

[0017] Furthermore, the initial value of the radius of the second arc is 1900 mm.

[0018] Furthermore, the plowshare is connected to the mounting base via a pin, and the mounting height is adjustable.

[0019] Furthermore, the mounting base is connected to the external plow frame via a U-shaped buckle.

[0020] The beneficial effects of this invention are as follows:

[0021] 1. This invention uses a fixed plowshare to enter the soil first, which cuts, lifts and initially loosens the soil clods, ensuring the stability of the tillage depth.

[0022] 2. This invention employs a rotary tillage plow. The soil, initially loosened by the plowshare, is fed to the rotary tillage plow body at the rear. The plow body passively rotates under the friction of the soil, undergoing secondary crushing and turning. During this process, the force between the soil and the rotary tillage plow body is primarily rolling friction within the bearings, resulting in significantly less resistance than the sliding friction between the soil and the plow body during traditional moldboard plowing, effectively reducing energy consumption. Under normal operating conditions (200mm tillage depth, 2.6km / h operating speed), the average tillage resistance using the combined turning and cutting surface plow is reduced by 25.27% compared to traditional moldboard plows.

[0023] 3. This invention uses a notched rotary tillage plow body and uses a mathematical model to ensure a smooth tangential transition between the plowshare surface and the rotary tillage plow body surface, so that the soil clods can be continuously and smoothly guided and turned, effectively avoiding the problem of soil and weeds clogging the joint.

[0024] 4. This invention adopts a modular and adjustable design. The plowshare is connected to the mounting base via a pin, facilitating quick adjustment of the tillage depth. The mounting base is connected to the plow frame via a U-shaped buckle, making the entire component modular and convenient for installation and replacement.

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the plow body surface truncated from the orthographic projection contour of the present invention;

[0027] Figure 2 This is a schematic diagram of the first and second circular arc curves of the present invention;

[0028] Figure 3 This is a schematic diagram of the plow structure of the present invention, which is a combination of flipped curved surfaces;

[0029] Figure 4 This is an isometric drawing of the plowshare-type plowshare with combined folding surfaces according to the present invention;

[0030] Figure 5 This is a schematic diagram of the deflection angle and tilt angle of the rotating plow body of the present invention;

[0031] Figure 6 This is a schematic diagram of the plowing process of the combined curved surface type of the present invention;

[0032] Figure 7 The graph shows the resistance of the combined plow with the flipped curved surface of this invention and the traditional moldboard plow over time.

[0033] Figure 8 This is a diagram showing the actual working effect of the invention.

[0034] The components represented by the numbers in the attached diagram are as follows:

[0035] 1. Plow body curved surface; 2. Front view; 3. Rotary plow body; 4. Plow frame; 5. Pin; 6. U-shaped buckle; 7. Mounting base; 8. Plow column; 9. Plowshare; 10. Plow side plate; 11. Bearing seat; 101. First arc; 102. Second arc Detailed Implementation

[0036] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0037] like Figure 1 and Figure 2 As shown, the rotatable plow body surface 1 is formed by scanning a first circular arc 101 with a fixed radius and a set of second circular arcs 102 with varying radii. The working surfaces of the rotating plow body 3 and plowshare 9 are formed by scanning the plow body surface 1 through a frontal view. Figure 2 The surface is formed by projection and segmentation; the resulting curved surface is divided into a rotating plow body 3 and a fixed cutting plow 9 by frontal projection according to the designed tillage width and tillage depth. The curved surface formed by rotating and scanning the fixed radius arc segment curve 101 is the segmented rotating plow body 3, and the curved surface formed by rotating and scanning the variable radius arc curve 102 is the fixed cutting plow 9 after segmentation.

[0038] The cutting plowshare 9 of the combined turning surface plow is located at the front of the plow body in the direction of travel and is fixed to the plow column 8 by the plow side plate 10; the rotating turning plow body 3 is connected to the plow column 8 by the bearing seat 11, and smoothly transitions tangentially with the cutting plowshare 9, leaving a free gap for the disc to rotate; the plow column 8 is connected to the mounting base 7 by the pin 5.

[0039] The installation position of the rotary tillage plow 3 must meet two key angle requirements: its rotating surface forms an inclination angle β with the vertical direction, preferably 12° (allowable range 10°~14°); and it forms an angle α with the forward direction, preferably 45° (allowable range 35°~50°). These two angles together determine the tillage effect of the rotary tillage plow 3 and are key parameters for achieving its optimal working efficiency.

[0040] The rotary tillage plow body 3 has notches. These notches are evenly distributed along the circumference of the disc, forming 6-12 serrations. The edges of the notches are ground to form sharp cutting edges, enabling the rotary tillage plow body 3 to actively and cleanly cut and transfer tangled straw, roots, and crop residues during rotation. This makes the combined turning and cutting surface plow suitable for cultivation environments with dense weeds, such as straw-returned fields and pastures, effectively ensuring the continuity and reliability of operations.

[0041] During operation, the tractor pulls the plow frame 4 forward. The plowshare 9 enters the soil first, completing the cutting, clod lifting, and initial loosening of the soil. Subsequently, the loosened clods move along the specific guide surface of the plowshare 9 and are conveyed onto the rotary tillage plow body 3. The rotary tillage plow body 3 is passively rotated under the friction of the clods, further breaking up and throwing the clods, and finally completing the turning and covering. The rotary tillage plow body 3 with a notch design continuously cuts weeds throughout the process to prevent clogging. The entire operation is smooth and efficient, with less resistance than traditional moldboard plows, and provides stable tillage depth and high-quality operation.

[0042] The above description provides examples of the preferred embodiments of the present invention. Parts not detailed herein are common knowledge to those skilled in the art. The scope of protection of the present invention is determined by the claims. Any equivalent modifications based on the technical teachings of the present invention are also within the scope of protection of the present invention.

Claims

1. A combination of a turnover curved surface plough, characterized in that, The utility model relates to a rotary plough, which comprises a plough column (8), a rotary plough body (3), a plough share (9) and a plough side plate (10), wherein the rotary plough body (3) is a concave disc and is arranged on the plough column (8) through a rotating shaft at the back center, the rotary plough body (3) is uniformly provided with a plurality of arc-shaped notches at the edge, the rotary surface of the rotary plough body (3) forms an inclination angle beta with the vertical direction and a deflection angle alpha with the horizontal advancing direction, the range of beta is 10-14 degrees, the range of alpha is 35-50 degrees, the plough share (9) is arranged below the front end of the rotary plough body (3), the plough share (9) is smoothly connected with the rotary plough body (3) and a free gap is left between the plough share (9) and the rotary plough body (3) for the rotation of the rotary plough body (3), and the front end of the plough share (9) is pointed and the rear side is fixed on the plough column through the plough side plate.

2. A combination lister according to claim 1, wherein, The edge of the notch on the rotary plough body (3) is formed into a sharp edge through grinding.

3. The combination lister of claim 1, wherein: The curved surface of the rotary plough body is formed by rotating and scanning a first circular arc along the central axis, and the curve equation of the first circular arc is: ； ； Wherein, the parameter The value range of is: The corresponding chord length is 400 mm.

4. The combination lister of claim 1, wherein: The starting point of the second circular arc coincides with the ending point of the first circular arc, and the two arcs are tangent at the connecting point; the radius value of the second circular arc varies with the progress of the first circular arc, and the radian angle of the first circular arc increases , the radius of the second circular arc increases accordingly , and the curve equation is: ； ； wherein, is a second arc progress parameter associated with the first arc progress, the second arc scans along the central axis of the rotating mold body to form a mold curvature. According to the width of tillage ( L ) and the depth of tillage ( H ), the profile of the moldboard (9) is designed on the side of the front view of the rotating tillage plow body (3), and the profile of the moldboard (9) is cut along the moldboard curve in the direction of the combined plow body to obtain the moldboard (9).

5. The combination lister of claim 3, wherein: The initial value of the radius of the second circular arc (102) is 1900 mm.

6. The combination lister of claim 1, wherein: The plough column is connected with the mounting seat (7) through a bolt (5), and the mounting height can be adjusted.

7. The combination lister of claim 5, wherein: The mounting seat (7) is connected with the external plough frame (4) through a U-shaped buckle (6).

Images