Nonlinear motion clamp-type cotton stalk pulling device

Abstract

This invention relates to a nonlinear motion clamp-type cotton stalk pulling device, comprising a frame, a left support frame, and a right support frame. The left and right support frames are respectively equipped with annular left and right guide rails and several left and right sliders cooperating with the left guide rail. Left and right clamping blocks are respectively provided on the outer sides of the left and right sliders. A strip-shaped gap for pulling out cotton stalks is formed between the left and right clamping blocks on opposite sides of the left and right guide rails. The left and right guide rails on both sides of the strip-shaped gap are called the left working guide rail section and the right working guide rail section. The left working guide rail section is divided into three segments from front to back along the forward direction. This invention can eliminate or reduce the soil resistance to cotton stalk pulling by changing the cotton stalk pulling speed, thereby reducing the cotton stalk breakage rate, and is particularly suitable for cotton stalk pulling operations under conditions of high soil resistance.

Description

Technical Field

[0001] This invention relates to a cotton stalk pulling device that can reduce soil resistance during the pulling process and thus reduce the cotton stalk breakage rate, belonging to the field of agricultural machinery technology. Background Technology

[0002] Existing cotton stalk removal mechanisms typically employ toothed disc or toothed roller mechanisms. These mechanisms bend or shear the cotton stalks during removal, making them suitable for thicker stalks. However, for thinner stalks, these mechanisms have a particularly high breakage rate. After the stalks break, the roots remain in the soil, affecting the planting of the next season's crops.

[0003] To prevent cotton stalks from breaking during the pulling process, Chinese Patent Publication No. CN111869411A (hereinafter referred to as the "Comparative Patent" for convenience) discloses a clamp-type double-row cotton stalk pulling device. A left auxiliary plate, a right auxiliary plate, and a middle auxiliary plate are respectively installed on the outer chain plates of the left chain drive mechanism, the right chain drive mechanism, and the middle chain drive mechanism. The cotton stalk is clamped through the strip-shaped gap formed between the left and right auxiliary plates and the middle auxiliary plate. The upward movement of the pulling component pulls the cotton stalk out of the soil. In use, the bending or shearing force on the cotton stalk can be reduced by adjusting the moving speed, thereby effectively reducing the occurrence of cotton stalk breakage. However, the applicant found in practice that although the clamp-type double-row cotton stalk pulling device reduces cotton stalk breakage, in cotton fields with high soil compaction, the cotton stalk experiences greater soil resistance during initial pulling, resulting in more cotton stalk breakage during high-speed pulling.

[0004] Therefore, how to further reduce the soil resistance encountered by cotton stalks during the pulling process, thereby reducing the breakage rate, has become an urgent problem to be solved. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a clamp-type cotton stalk pulling device that can reduce the cotton stalk breakage rate by reducing the soil pulling resistance encountered by the cotton stalk during the pulling process, and is especially suitable for pulling cotton stalks in hard cotton fields.

[0006] To solve the above-mentioned technical problems, the technical solution proposed by this invention is: a nonlinear motion clamp-type cotton stalk lifting device, comprising a frame, a left support frame, and a right support frame. The left and right support frames are mounted on the frame. The left support frame is provided with an annular left guide rail, a plurality of left sliders cooperating with the left guide rail, and a left drive mechanism for driving the left sliders to move along the left guide rail. The right support frame is provided with an annular right guide rail, a plurality of right sliders cooperating with the right guide rail, and a right drive mechanism for driving the right sliders to move along the right guide rail. The left and right guide rails are parallel and inclined at a preset angle relative to the horizontal plane. The left and right guide rails are positioned on opposite sides of the left and right guide rails. A strip-shaped gap for removing cotton stalks is formed between the right and left sliders; the left and right guide rails on both sides of the strip-shaped gap are called the left working guide rail segment and the right working guide rail segment. The left working guide rail segment is divided into three segments from front to back along the forward direction, namely the first left straight segment, the left curved segment, and the second left straight segment. The first left straight segment and the second left straight segment both gradually rise from front to back. The left curved segment first decreases and then rises from front to back. The right working guide rail segment is divided into the first right straight segment, the right curved segment, and the second right straight segment from front to back along the forward direction, corresponding to the first left straight segment, the left curved segment, and the second left straight segment.

[0007] In existing technologies, soil resistance leads to excessive stalk breakage during high-speed stalk pulling due to excessive resistance. Based on research into soil mechanics and crop pulling resistance, the applicant of this invention discovered that cotton stalks experience soil resistance during initial pulling, and breakage easily occurs when the pulling force exceeds the stalk's tolerance limit. By altering the stalk's movement during pulling—specifically, by allowing it to move downwards appropriately—the direction and duration of the pulling force can be changed, reducing soil resistance and the instantaneous decrease in pulling force. This allows more time for soil redistribution around the stalk roots, reducing soil resistance and significantly lowering the breakage rate. Therefore, this invention uses left and right curve segments on the left and right guide rails respectively, causing the stalk roots to move downwards and then upwards to complete the pulling operation. The stalk's trajectory is non-linear; in other words, the "non-linear motion" described in this invention refers to the non-linear movement of the stalk after being clamped by the left and right clamps.

[0008] Furthermore, when cotton stalks are pulled downwards during the harvesting process, the disturbance to the soil differs compared to pulling them directly upwards. Pulling directly upwards causes the cotton stalk roots to detach rapidly from the soil, creating large cavities and disrupting the original soil structure. However, appropriate downward movement allows soil particles to redistribute more naturally around the cotton stalks, reducing excessive soil porosity and subsidence caused by pulling. This helps maintain the soil's aeration, permeability, and other physical properties, which is beneficial for subsequent crop cultivation. Attached Figure Description

[0009] The invention will now be further described with reference to the accompanying drawings.

[0010] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention.

[0011] Figure 2 This is a simplified diagram illustrating the interaction between the left guide rail and the left slider.

[0012] Figure 3 yes Figure 2 A partial schematic diagram.

[0013] Figure 4 This is a schematic diagram of the left slider.

[0014] Figure 5 This is a schematic diagram of the shape of the left working guide section in Embodiment 1.

[0015] Figure 6 This is a schematic diagram of the shape of the left working guide section in Embodiment 2.

[0016] Figure 7 This is a schematic diagram of the shape of the left working guide section in Embodiment 3.

[0017] Reference numerals in the attached drawings: 1. Left support frame; 2. Right support frame; 3. Left drive mechanism; 4. Right drive mechanism; 5. Left slider; 6. Right slider; 7. Left guide rail; 8. Guide rod; 9. Left positioning pin. Detailed Implementation

[0018] Example 1: This example illustrates a non-linear motion clamp-type cotton stalk pulling device, such as... Figure 1 As shown, the machine includes a frame (not shown), a left support frame 1, and a right support frame 2. The left support frame 1 and the right support frame 2 are mounted on the frame. The left support frame 1 has an annular left guide rail 7, several left sliders 5 that cooperate with the left guide rail 7, and a left drive mechanism 3 that drives the left sliders 5 to move along the left guide rail 7. The right support frame 2 has an annular right guide rail, several right sliders 6 that cooperate with the right guide rail, and a right drive mechanism 4 that drives the right sliders 6 to move along the right guide rail. The left guide rail 7 and the right guide rail are parallel and inclined at a preset angle relative to the horizontal plane. The left sliders 5 and the right sliders 6 are respectively provided with left clamping blocks and right clamping blocks on their outer sides. A strip-shaped gap for removing cotton stalks is formed between the left and right clamping blocks on opposite sides of the left guide rail 7 and the right guide rail. Figure 1 The left side is the feeding end, and the arrow on the left indicates the feeding direction. The inclination angle of the left guide rail 7 and the right guide rail is related to the height of the cotton stalk.

[0019] Preferably, the left slider 5 and the left clamping block are integrated, and the right slider 6 and the right clamping block are integrated. Of course, the left slider 5 and the left clamping block can also be two separate parts connected together by fasteners. The configuration of the right slider 6 and the right clamping block is the same as that of the left slider 5 and the left clamping block. Figure 2 , Figure 3 and Figure 4 As shown, the left slider 5 is tightly attached to the left support frame 1, and the left slider 5 is provided with a left positioning pin 9 for inserting into the left guide rail 7. Similarly, the right slider 6 is tightly attached to the right support frame 2, and the right slider 6 is provided with a right positioning pin for inserting into the right guide rail. The left and right sliders 5 and 6 move through the cooperation of the left positioning pin 9, the right positioning pin, and the left and right guide rails. Furthermore, anti-slip grooves are provided on the opposite sides of the left and right clamping blocks to better clamp the cotton stalks.

[0020] To facilitate the entry of cotton stalks into the strip-shaped gaps, the frame is equipped with a feeding mechanism at the feed end of the strip-shaped gaps. This is existing technology and will not be described in detail here.

[0021] The left and right guide rails on either side of the strip-shaped gap are called the left working guide rail section and the right working guide rail section, respectively. These sections represent the parts of the left and right guide rails used for pulling up the cotton stalks. Figure 5 As shown, the left working guide section is divided into three segments from front to back along the forward direction, namely the first left straight segment ( Figure 5 Part A of the middle curve), left curve segment ( Figure 5 (Part B in the middle) and the second left straight line segment ( Figure 5 In section C), the first and second left straight segments both rise smoothly from front to back. The left curved segment first decreases and then increases from front to back. The right working guide section is divided from front to back along the forward direction into a first right straight segment, a right curved segment, and a second right straight segment, corresponding to the first, left, and second left straight segments. Thus, during the cotton stalk pulling process, when the left slider 5 moves to the left curved segment, the right slider 6 also moves to the right curved segment. The cotton stalk held by the left and right clamps moves downwards and then upwards, instantly reducing the tension on the cotton stalk. This allows more time for the soil around the cotton stalk roots to redistribute, reducing the soil's resistance to the upward movement of the cotton stalk roots and dispersing the soil resistance on the cotton stalk, thereby significantly reducing the breakage rate.

[0022] The lengths of the left and right working guide sections are the stalk pulling distances. The applicant's practice shows that the left and right curve segments are best set at a stalk pulling distance of 3-5 cm to the left of the left and right working guide sections. When the cotton stalk moves to this position, the tension on the cotton stalk is relatively large and needs to be buffered. The soil around the root of the cotton stalk also has sufficient time to redistribute. For this reason, in this embodiment, the cotton stalk moves downward first and then upward at this position. The tension on the cotton stalk can be reduced instantly, and the redistributed soil also reduces the resistance to the cotton stalk when it is pulled up again, thus reducing the breakage rate.

[0023] Preferably, the left drive mechanism 3 and the right drive mechanism 4 are chain drive mechanisms or belt drive mechanisms. The left and right sliders 6 are provided with vertical through holes. The chain drive mechanism or belt drive mechanism is provided with guide rods 8 that form a sliding pair with the through holes of the left and right sliders 6. In this way, when the left and right sliders 6 slide along the left guide rail 7 and the right guide rail, they can also move up and down along the guide rods 8. Therefore, the left and right sliders 6 can smoothly pass through the left curve segment and the right curve segment.

[0024] This embodiment is an improvement upon the prior art patent described in the background section. The main difference lies in the fact that this embodiment uses a single-row cotton stalk pulling technique, while the prior art patent uses a double-row technique. The improvement in this embodiment involves modifying the movement trajectory of the left and right clamping blocks. This alters the movement trend of the cotton stalk during pulling, causing it to move slightly downwards during the process. This provides a brief buffer between the forces acting on the left and right clamping blocks and the cotton stalk, reducing the risk of breakage due to excessive instantaneous tension. This maximizes the integrity of the cotton stalk, improves its utilization value, effectively reduces repetitive work, and increases pulling efficiency. Of course, those skilled in the art will be motivated to achieve double-row cotton stalk pulling by improving the movement trajectory of the intermediate plate in the prior art patent.

[0025] Example 2: This example is an improvement on Example 1, and the difference from Example 1 is as follows: Figure 6 As shown, a left horizontal segment is provided between the first left straight line segment and the left curved segment. Figure 6 Part A in the middle is the segment of the first left straight line. Figure 6 Part B is a segment of the left curve. Figure 6 The middle C section is the segment of the second left straight line. Figure 6 Section E is a left horizontal segment. Correspondingly, a right horizontal segment corresponding to the left horizontal segment is provided between the first right straight segment and the right curved segment. During the stalk pulling process, the left and right horizontal segments allow the cotton stalk to pause appropriately, thereby changing the magnitude and duration of the tension on the cotton stalk and reducing breakage caused by excessive instantaneous tension.

[0026] Example 3: This example is another improvement based on Example 1, and the difference from Example 1 is as follows: Figure 7 As shown, a left lifting segment is provided between the first left straight line segment and the left curved segment. The inclination angle of the left lifting segment is greater than the inclination angle of the first left straight line segment. Figure 7 Part A in the middle is the segment of the first left straight line. Figure 7 Part B is a segment of the left curve. Figure 7 The middle C section is the segment of the second left straight line. Figure 7 Section D is a left-lifting segment. Correspondingly, a right-lifting segment, corresponding to the left-lifting segment, is provided between the first right straight segment and the right curved segment. The inclination angle of the right-lifting segment is greater than that of the first right straight segment. During the stalk pulling process, the left and right lifting segments allow the cotton stalk to descend more significantly when passing through the left and right curved segments. This allows for better redistribution of the soil around the cotton stalk roots, reducing soil resistance to the upward movement of the cotton stalk roots and thus lowering the stalk breakage rate.

[0027] Example 4: This example differs from Examples 1-3 in that the inclination angle of the first left straight segment is smaller than that of the second left straight segment, and correspondingly, the inclination angle of the first right straight segment is smaller than that of the second right straight segment. At the beginning of the extraction, a low-speed mode is used to ensure a firm grip on the cotton stalk. Once the cotton stalk has passed the curve and been pulled out to a certain height, the high-speed mode is switched to quickly and completely extract the cotton stalk. This improves overall extraction efficiency while maintaining extraction quality.

[0028] Finally, it should be emphasized that the left support frame, left slider, left clamping block, and left guide rail described in this invention have the same structure and shape as the right support frame, right slider, right clamping block, and right guide rail (only the installation direction is different, and they are mirror images of each other), and are used to simultaneously complete the clamping and pulling of cotton stalks.

Claims

1. A nonlinear motion clamp-type cotton stalk pulling device, characterized in that: The device includes a frame, a left support frame, and a right support frame. The left and right support frames are mounted on the frame. The left support frame has an annular left guide rail, several left sliders that cooperate with the left guide rail, and a left drive mechanism that drives the left sliders to move along the left guide rail. The right support frame has an annular right guide rail, several right sliders that cooperate with the right guide rail, and a right drive mechanism that drives the right sliders to move along the right guide rail. The left and right guide rails are parallel and inclined at a preset angle relative to the horizontal plane. The left and right sliders are respectively provided with a left clamping block and a right clamping block on their outer sides. A strip-shaped gap for removing cotton stalks is formed between the left and right clamping blocks on opposite sides of the left and right guide rails. The left and right guide rails on both sides of the strip-shaped gap are called the left working guide rail segment and the right working guide rail segment. The left working guide rail segment is divided into three segments from front to back along the forward direction: the first left straight segment, the left curved segment, and the second left straight segment. The first left straight segment and the second left straight segment both rise smoothly from front to back. The left curved segment first decreases and then rises from front to back. The right working guide rail segment is divided into the first right straight segment, the right curved segment, and the second right straight segment, which are corresponding to the first left straight segment, the left curved segment, and the second left straight segment, along the forward direction.

2. The nonlinear motion clamp-type cotton stalk pulling device according to claim 1, characterized in that: The tilt angle of the first left straight line segment is smaller than that of the second left straight line segment, and correspondingly, the tilt angle of the first right straight line segment is smaller than that of the second right straight line segment.

3. The nonlinear motion clamp-type cotton stalk pulling device according to claim 1 or 2, characterized in that: A left horizontal segment is provided between the first left straight line segment and the left curve segment, and correspondingly, a right horizontal segment is provided between the first right straight line segment and the right curve segment, corresponding to the left horizontal segment.

4. The nonlinear motion clamp-type cotton stalk pulling device according to claim 1 or 2, characterized in that: A left lifting segment is provided between the first left straight line segment and the left curved segment. The tilt angle of the left lifting segment is greater than that of the first left straight line segment. Correspondingly, a right lifting segment is provided between the first right straight line segment and the right curved segment, corresponding to the left lifting segment. The tilt angle of the right lifting segment is greater than that of the first right straight line segment.

5. The nonlinear motion clamp-type cotton stalk pulling device according to claim 1 or 2, characterized in that: Anti-slip grooves are provided on the opposite sides of the left and right clamping blocks.

6. The nonlinear motion clamp-type cotton stalk pulling device according to claim 1 or 2, characterized in that: The frame is equipped with a feeding mechanism at the feed end of the strip-shaped slit.

7. The nonlinear motion clamp-type cotton stalk pulling device according to claim 1 or 2, characterized in that: The left and right drive mechanisms are chain drive mechanisms or belt drive mechanisms. Both the left and right sliders are provided with vertical through holes. The chain drive mechanism or belt drive mechanism is provided with guide rods that form a sliding pair with the through holes of the left and right sliders.

8. The nonlinear motion clamp-type cotton stalk pulling device according to claim 1 or 2, characterized in that: The left slider and the left clamping block are integrated, and the right slider and the right clamping block are integrated.

9. The nonlinear motion clamp-type cotton stalk pulling device according to claim 8, characterized in that: The left slider is attached to the left support frame and is provided with a left positioning pin for inserting into the left guide rail. The right slider is attached to the right support frame and is provided with a right positioning pin for inserting into the right guide rail.

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