An automatic row detection sensor for a corn combine

Abstract

The application relates to the technical field of detection sensors, in particular to a corn combine harvester automatic row detection sensor, which comprises a rack, a connecting box, a poking mechanism for poking away obstacles and a pushing mechanism, a rotating through hole is arranged in the bottom surface of the rack, and the top end of the connecting box is fixedly connected with the bottom surface of the rack. In the application, the rack is installed on the harvester, then the position sensing element on the poking mechanism is used to detect the position of corn stalks, when multiple detection signals appear due to the contact of the position sensing element with obstacles, the poking mechanism is started to drive multiple box bodies to separate and rotate, the multiple box bodies push the obstacles that may block the measurement, the pushing mechanism is started to drive the lowermost connecting plate to move to a suitable position to detect the position of the corn stalks again, the detection precision is improved, when the corn stalks are densely planted, the total length of the multiple box bodies can be shortened through the poking mechanism, so that the poking mechanism is reset after detection, and the corn combine harvester automatic row detection sensor is convenient to use.

Description

Technical Field

[0001] This invention relates to the field of detection sensor technology, specifically a detection sensor for automatic row alignment in a corn combine harvester. Background Technology

[0002] High-density, narrow-spacing cornfields utilize a planting technique that increases the number of corn plants per unit area to improve light energy utilization and yield. However, when harvesting corn stalks in high-density, narrow-spacing cornfields using corn harvesters, existing row control technologies often struggle to accurately identify and adapt to this tightly packed crop layout. This can lead to problems such as missed harvests and plant damage during harvesting. Traditional row control detection methods are mainly divided into non-contact and contact detection. Non-contact detection uses cameras or radar, but its application is limited by the working environment, has poor adaptability, and is costly. Contact detection uses devices equipped with mechanical sensors, but some cornfields may contain various types of corn stalks that have been manually or naturally knocked down. During harvesting, these knocked-down stalks may accidentally contact the sensors, affecting the accuracy of contact detection and causing inconvenience. Furthermore, in narrow-spacing cornfields, due to the dense distribution of corn, general contact detection sensors are inconvenient for directly detecting the location of corn stalks, making it even more difficult. Summary of the Invention

[0003] The purpose of this invention is to provide a detection sensor for automatic row alignment in a corn combine harvester, so as to solve the problems mentioned in the background art.

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

[0005] A detection sensor for automatic row alignment in a corn combine harvester, comprising:

[0006] The device includes a frame, a connecting box, a toggle mechanism for removing obstructions, and a push mechanism. The frame has a rotating through-hole on its bottom surface. The top of the connecting box is fixedly connected to the bottom surface of the frame. An angle detector is installed inside the connecting box, and a detection shaft is fixedly connected to the angle detector. The detection shaft is rotatably sleeved inside the rotating through-hole, and a base is fixedly sleeved on the top of the detection shaft. The toggle mechanism is located at one end of the base. The toggle mechanism includes multiple vertically arranged boxes, each with a connecting plate on one side. Multiple position sensing elements are fixedly connected to one side of each connecting plate, and each box contains... A contact sensing PCB board is provided, and multiple contact sensing PCB boards are electrically connected to multiple position sensing elements on adjacent connecting boards. Except for the connecting board located at the bottom, one side of each of the other connecting boards is fixedly connected to one side of the adjacent box. Both ends of the other side of each of the boxes are fixedly connected to a sleeve rod. Except for the square box located at the bottom, the two sleeve rods on the other boxes are rotatably connected to a support arm. One end of each support arm has a circular hole. The inner sidewall of the circular hole at one end of each of the two support arms on any box is rotatably sleeved with the outer sidewall of the two sleeve rods on the box below. The pushing mechanism is located on the side of the bottom box.

[0007] Furthermore, a reset spring is fixedly connected to the outer wall of the base, and one end of the reset spring is fixedly connected to an inner wall of the frame through a connector.

[0008] Furthermore, one end of the base is fixedly connected to a fixing rod, and the other end of the fixing rod is rotatably connected to a guide rail. The other sides of the two boxes located at the top and bottom are fixedly connected to sliders, and the two sliders are slidably engaged inside the guide rail.

[0009] Furthermore, the guide rail is equipped with a rotating plate, and one end of the rotating plate has a rotating hole. The inner wall of the rotating hole is rotatably sleeved with the outer wall of the connecting box. A locking block is slidably engaged inside the guide rail, and one end of the locking block is rotatably connected to a connecting shaft. A pneumatic push rod is fixedly connected to the top surface of the other end of the rotating plate, and the movable end of the pneumatic push rod is fixedly connected to one end of the connecting shaft.

[0010] Furthermore, except for the bottommost box, each of the other boxes has a contact module fixedly connected to one end of its bottom surface, and except for the topmost box, each of the other boxes has a power supply module fixedly connected to the other end of its top surface. The contact modules on two adjacent boxes are movably connected to the power supply module.

[0011] Furthermore, in addition to the topmost box, two U-shaped plates are fixedly connected to the other end of the top surface of each of the other boxes. The two U-shaped plates on any box are located on opposite sides of the adjacent power supply modules. Toothed rollers are rotatably connected to both ends of the top surface of each U-shaped plate. A toothed belt is rotatably sleeved between the outer walls of the two toothed rollers on each U-shaped plate. Two drive motors are installed below each U-shaped plate. Each drive motor is located inside the adjacent box, and the motor end of each drive motor is fixedly connected to one end of a toothed roller on the adjacent U-shaped plate.

[0012] Furthermore, the propulsion mechanism includes:

[0013] The system comprises a U-shaped frame, a scissor-type support, and a slide rail. The U-shaped frame is fixedly connected to one end of the base, and an adjusting screw is rotatably connected between the two arms of the U-shaped frame. The adjusting screw is a positive and negative thread screw. The scissor-type support includes multiple support rods. Two support rods located at one end of the scissor-type support are rotatably connected to support plates at one end, and two support plates are fixedly connected to engagement cylinders at one end. The inner walls of the two engagement cylinders are screwed into the outer walls of the adjusting screw. One side of the slide rail is fixedly connected to one end of the connecting plate located at the bottom. The slide rail includes two parallel slide tracks, and two sliding plates are slidably engaged inside the two slide tracks. Two support rods located at the other end of the scissor-type support are rotatably connected to one end of the two moving plates, respectively.

[0014] Furthermore, a motor box is fixedly connected to one end of the U-shaped frame, and a power motor is installed inside the motor box. The motor end of the power motor is fixedly connected to one end of the adjusting screw.

[0015] Furthermore, a slot is provided on the other side of the connecting plate at the bottom, and a protruding ring is fixedly sleeved on one end of the outer side wall of the multiple rotating shafts in the middle of the scissor bracket, and any protruding ring is movably engaged in the slot.

[0016] Furthermore, one side of the support rod of the scissor bracket is chamfered.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. By installing the frame onto the harvester, the position sensing element connected to multiple connecting plates on the actuating mechanism is used to detect the position of the corn stalk. If an obstruction simultaneously contacts the position sensing element, resulting in multiple detection signals, the actuating mechanism is activated to drive multiple boxes to separate and rotate. This causes the multiple boxes to push up any obstructions that might be blocking the measurement, and the pushing mechanism is activated to move the lowest connecting plate to a suitable position to detect the corn stalk position again, thereby improving detection accuracy. Furthermore, when the corn stalks are planted densely, the total length of the multiple boxes can be shortened using the actuating mechanism, making it easier for the actuating mechanism to reset after detection and perform the next detection, thus facilitating its use.

[0019] 2. When the harvester moves, it can drive multiple boxes to move synchronously, causing the position sensing elements on the multiple boxes to contact the corn stalk. After sensing the position of the corn stalk away from the adjacent detection shaft, the corn stalk pushes the multiple boxes and detection shafts to rotate around the adjacent detection shaft as the harvester moves, until the corn stalk detaches from the multiple boxes. The rotation angle between the multiple boxes and the detection shaft is measured by the angle detector, and the specific position of the corn stalk and the detection shaft is calculated by the calculation formula. This provides effective detection data for subsequent row control to reduce row alignment errors. After the corn stalk detaches from the multiple boxes, the base can drive the detection shaft and multiple boxes to reset through the return spring for the next detection.

[0020] 3. When debris such as leaves, knocked-down or naturally tilted corn stalks come into contact with the position sensing element, causing excessive position information to be generated, the pneumatic push rod is activated to push the rotating part of the guide rail via the locking block. This causes the guide rail to pull the other boxes (except the bottom box) to move via two sliders. As the other boxes move, they rotate through adjacent sleeves and support arms, pushing the obstruction upwards. The position sensing elements on the other boxes (except the bottom box) are powered through contact modules with adjacent power supply modules. After the other boxes rotate through the adjacent sleeves and support arms, the multiple boxes naturally separate, thus stopping the position sensing elements on the other boxes from operating, reducing... To minimize the provision of invalid information, the power motor can be activated to drive the adjusting screw to rotate, causing the adjusting screw to move the two rotating cylinders towards each other. This allows the scissor bracket to extend and move the bottom connecting plate to the appropriate position. The bottom connecting plate is then moved below other boxes to re-detect the corn stalk position, improving detection accuracy. After detection, multiple boxes are reset by pneumatic push rods via guide rails. When the contact module on the box contacts the adjacent power supply module, the drive motor inside the box drives the adjacent toothed belt to rotate via toothed rollers, rubbing out any blades or other objects that may be stuck between the contact module and the adjacent power supply module, thus avoiding interference with the contact between the contact module and the adjacent power supply module.

[0021] 4. When corn stalks are planted densely, after one corn stalk is tested, multiple boxes, connecting plates, and detection shafts may be blocked by other corn stalks and cannot be fully reset when the reset spring on the base is driven to reset. The pneumatic push rod can be activated to push the guide rail to rotate vertically through the locking block. This will cause the guide rail to pull multiple boxes through two sliders to rotate by the adjacent sleeve rods and support arms, so that the multiple boxes are in a vertical parallel state. This will shorten the total length of the multiple boxes and make it easier for the multiple boxes to be fully reset for the next test. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2This is a schematic diagram showing the positional relationship between the actuating mechanism and the pushing mechanism in this invention;

[0024] Figure 3 This is a schematic diagram of the frame and connecting box structure in this invention;

[0025] Figure 4 This is an exploded view of the actuation mechanism structure in this invention;

[0026] Figure 5 This is a schematic diagram of the guide frame and card block structure in this invention;

[0027] Figure 6 This is a schematic diagram of the box structure in this invention;

[0028] Figure 7 In this invention Figure 6 Enlarged view of a portion of point A in the middle;

[0029] Figure 8 This is an exploded view of the propulsion mechanism structure in this invention;

[0030] Figure 9 This is a top view of the form used in this invention.

[0031] In the diagram: 100, frame; 200, connecting box; 210, detection shaft; 220, base; 221, return spring; 300, toggle mechanism; 310, box body; 311, slider; 312, contact module; 313, power supply module; 314, U-shaped plate; 315, toothed belt; 320, connecting plate; 321, position sensing element; 322, slot; 330, sleeve rod; 331, support arm; 340, fixing rod; 341, guide rail; 342, locking block; 350, rotating plate; 351, pneumatic push rod; 400, pushing mechanism; 410, U-shaped frame; 411, adjusting screw; 420, scissor bracket; 421, rotating cylinder; 422, convex ring; 430, motor box; 440, slide rail; 441, moving locking plate. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0033] Please see Figures 1-9 In this embodiment of the invention, a detection sensor for automatic row alignment in a corn combine harvester includes:

[0034] The system comprises a frame 100, a connecting box 200, a toggle mechanism 300 for removing obstructions, and a push mechanism 400. The frame 100 has a rotating through hole on its bottom surface. The top of the connecting box 200 is fixedly connected to the bottom surface of the frame 100. An angle detector is installed inside the connecting box 200, and a detection shaft 210 is fixedly connected to the angle detector. The detection shaft 210 is rotatably sleeved inside the rotating through hole, and a base 220 is fixedly sleeved on the top of the detection shaft 210. The toggle mechanism 300 is located at one end of the base 220. The toggle mechanism 300 includes multiple vertically arranged boxes 310, each with a connecting plate 320 on one side. Multiple position sensing elements 321 are fixedly connected to one side of each connecting plate 320. Each box 310 also has a... A contact sensing PCB board is provided, and multiple contact sensing PCB boards are electrically connected to multiple position sensing elements 321 on adjacent connecting plates 320. Except for the connecting plate 320 located at the bottom, one side of the other connecting plates 320 is fixedly connected to one side of the adjacent box 310. Both ends of the other side of multiple boxes 310 are fixedly connected to sleeve rods 330. Except for the square box 310 located at the bottom, the two sleeve rods 330 on the other boxes 310 are rotatably connected to support arms 331. One end of each support arm 331 is provided with a circular hole. The inner sidewall of the circular hole at one end of the two support arms 331 on any box 310 is rotatably sleeved with the outer sidewall of the two sleeve rods 330 on the lower box 310. The pushing mechanism 400 is located on the side of the lower box 310.

[0035] Specifically, the angle detector is connected to the detection shaft 210, so that when the detection shaft 210 rotates, the angle detector can detect the rotation angle of the detection shaft 210. This is existing technology and will not be described in detail here. The position sensing elements 321 are arranged in a linear array on adjacent connecting plates 320. By touching any position sensing element 321, the position sensing element 321 sends a signal to the adjacent contact sensing PCB board, thereby obtaining the distance of the touched position sensing element 321 from the central axis of the detection shaft 210. This is existing technology and will not be described in detail here. During installation, the frame 100 is fixed to the harvester through connectors. In the initial state, multiple boxes 310 are arranged at an angle in sequence, and between two adjacent boxes 310, the top surface of the lower box 310 overlaps with the bottom surface of the upper box 310. This ensures that when the multiple boxes 310 are in the initial position, the position sensing elements 321 on all boxes 310 are located on the same plane. On the surface, all position sensing elements 321 are arranged linearly and staggered, so that the distance of the position sensing element 321 on the bottom box 310 to the detection axis 210 increases sequentially from the bottom box 310 to the top box 310. When any position sensing element 321 touches the corn stalk, it can transmit data to the PCB board of the adjacent contact sensing element, thereby detecting the distance of the corn stalk touching the position sensing element 321 from the detection axis 210. When the harvester is traveling, with the detection axis 210 as the origin, the plane where the multiple boxes 310 are located is the x-axis, the travel direction is the y-axis, θ is the angle at which the multiple boxes 310 are deflected by the stalk after contacting the corn stalk, h is the distance of the corn stalk touching the position sensing element 321 from one end of the base 220 on the y-axis, and L is the distance of the position sensing element 321 touched by the corn stalk from the detection axis 210. The position of the corn stalk relative to the origin is shown in formula (1.1).

[0036]

[0037] The relative speed of the harvesting vehicle can be calculated from the position of the corn stalk before and after it, as shown in formula (1.2).

[0038]

[0039] Where P represents the position of the corn stalks at the front and rear points, the velocity value v is calculated by dividing the distance from the nearest point to the previous point by the time between the two detections, and Δt is the time change. Thus, by using the rotation angle of the base 220 detected by the angle detector and the distance from the corn stalk-touching position sensing element 321 to the detection axis 210, the specific position of the corn stalk in the plane coordinate system can be calculated using the angle and distance. This provides effective detection data for subsequent row control, reducing row alignment errors. Later, during the harvesting process, when the position sensing element 321 contacts the corn stalk being harvested, if there are stalks, leaves, or other objects, or if nearby stalks that have already been harvested but were knocked down midway and are obstructing the view, an alarm will be triggered. Multiple position sensing elements 321 simultaneously touch an object and emit signals. At this time, the other boxes 310 (except the bottom box 310) can be rotated via adjacent sleeve rods 330 and support arms 331 to separate the multiple boxes 310. When the multiple boxes 310 rotate, they push the obstructing object upwards. At the same time, the pushing mechanism 400 can be used to move the bottom connecting plate 320 to the location of the corn stalk that was previously detected, so as to perform touch detection on the corn stalk that needs to be touched this time. The obstructing object is pushed away from the bottom connecting plate 320 by the other boxes 310, thereby reducing the obstruction between the corn stalk at the required touch detection position and the position sensing element 321 on the bottom connecting plate 320 and improving the detection accuracy.

[0040] Example 1

[0041] like Figures 2-5 As shown, in this embodiment, a return spring 221 is fixedly connected to the outer wall of the base 220, and one end of the return spring 221 is fixedly connected to an inner wall of the frame 100 through a connector. A fixing rod 340 is fixedly connected to one end of the base 220, and a guide rail 341 is rotatably connected to one end of the fixing rod 340. Slider 311 is fixedly connected to the other side of the two boxes 310 located at the top and bottom, and the two sliders 311 are slidably engaged inside the guide rail 341. A rotating plate 350 is provided in the guide rail 341, and a rotating hole is opened at one end of the rotating plate 350. The inner wall of the rotating hole is rotatably engaged with the outer wall of the connecting box 200. A locking block 342 is slidably engaged inside the guide rail 341, and a connecting shaft is rotatably connected to one end of the locking block 342. A pneumatic push rod 351 is fixedly connected to the top surface of the other end of the rotating plate 350, and the movable end of the pneumatic push rod 351 is fixedly connected to one end of the connecting shaft.

[0042] In this embodiment, when the multiple boxes 310 are in their initial positions, after the position sensing element 321 on any connecting plate 320 comes into contact with the corn stalk, as the harvesting vehicle moves forward, all boxes 310, connecting plates 320, position sensing elements 321, bases 220, and detection shafts 210 will be driven by the corn stalks to rotate around the central axis of the detection shaft 210. After the corn stalks disengage from the position sensing element 321, the base 220 can be reset by the adjacent reset springs 221, thus completing the reset of the detection shaft 210, all boxes 310, connecting plates 320, and position sensing elements 321. This process is repeated when the corn stalks are planted... When the initial state of the multiple boxes 310 is relatively long, they may come into contact with other corn stalks during the resetting process, making it difficult to rotate them to a fully reset state. In this case, the pneumatic push rod 351 can be activated to drive the locking block 342 to slide on the guide rail 341, thereby causing the guide rail 341 to rotate around the center of one end of the fixed rod 340, thus rotating the guide rail 341 to a vertical state. The guide rail 341 then pulls the multiple boxes 310 to rotate synchronously through the slider 311, so that all boxes 310 except the bottom box 310 rotate through the adjacent sleeve rods 330 and the support arm 331, making all boxes 310 vertical. The parallel arrangement shortens the total length of the multiple boxes 310, facilitating the return spring 221 to rotate the base 220 and all boxes 310 to a complete reset. Then, the pneumatic push rod 351 is activated to reset the locking block 342, which in turn resets the guide rail 341. This, in turn, causes the guide rail 341 to pull the top box 310 back to its reset position via the slider 311, restoring all boxes 310 to their initial positions for the next inspection. The pneumatic push rod 351 can be configured with a controller to control its opening and closing. When multiple position sensors 321 touch signals, the controller can control the movable end of the pneumatic push rod 351 to rise, thereby... Except for the bottom box 310, all other boxes 310 rotate to push the obstruction upwards. After the corn stalk is removed from the position sensing element 321, the controller can control the pneumatic push rod 351 to push the guide rail 341 vertically through the locking block 342 and then reset it. This facilitates the reduction of the total length of the multiple boxes 310 and their reset to the initial state. The controller is existing technology and will not be described in detail here. When the multiple boxes 310 rotate around the central axis of the detection shaft 210, the central axis of the detection shaft 210 and the central axis of the connecting box 200 are located on the same central axis, which will cause the pneumatic push rod 351 and the rotating plate 350 to rotate synchronously around the central axis of the detection shaft 210.

[0043] like Figures 6-7As shown, in this embodiment, except for the bottommost box 310, each of the other boxes 310 has a contact module 312 fixedly connected to one end of its bottom surface. Except for the topmost box 310, each of the other boxes 310 has a power supply module 313 fixedly connected to the other end of its top surface. The contact modules 312 on two adjacent boxes 310 are movably connected to the power supply module 313. Except for the topmost box 310, each of the other boxes 310 has two U-shaped plates 314 fixedly connected to the other end of its top surface. The two U-shaped plates 314 on any box 310 are located on opposite sides of the adjacent power supply module 313. Both ends of the top surface of any U-shaped plate 314 are rotatably connected to toothed rollers. A toothed belt 315 is rotatably sleeved between the outer walls of the two toothed rollers on any U-shaped plate 314. Two drive motors are provided below each U-shaped plate 314. Each drive motor is located inside the adjacent box 310, and the motor end of each drive motor is fixedly connected to one end of a toothed roller on the adjacent U-shaped plate 314.

[0044] In specific implementation, when the multiple boxes 310 are in their initial state, between two adjacent boxes 310, the power supply module 313 on the lower box 310 is in contact with the contact module 312 on the upper box 310. Through the contact between the power supply module 313 and the contact module 312, the contact sensing PCBs and adjacent position sensing elements 321 on the other boxes 310 (except for the bottom box 310) are powered and operate normally. The contact power supply method is existing technology and will not be described in detail here. When the pneumatic push rod 351 is activated and drives the multiple boxes 310 to separate, pushing the obstruction away, the contact modules 312 on the other boxes 310 (except for the bottom box 310) lose power because they are detached from the power supply module 313. Therefore, no further signal should be provided to avoid generating unnecessary contact signals. When multiple boxes 310 return to their initial state, when the contact module 312 presses onto the adjacent power supply module 313, the toothed belts 315 on opposite sides of the power supply module 313 are driven to rotate continuously by the adjacent toothed rollers. The outer wall of the toothed belt 315 has abrasive material, which allows the toothed belt 315 to rub away any debris such as blades that may be trapped between the contact module 312 and the power supply module 313 through the abrasive material on the outer wall, making it easier for the contact module 312 and the power supply module 313 to make contact and supply power. A battery can be installed inside the box 310 to power the adjacent drive motor. The drive motor can drive the adjacent toothed belt 315 to rotate by driving the adjacent toothed rollers to rotate. The toothed rollers can be multiple toothed pulleys fitted onto the same axle to ensure meshing with the teeth of the toothed belt 315.

[0045] like Figure 1 or Figure 8 As shown, in this embodiment, the actuating mechanism 400 includes:

[0046] The system comprises a U-shaped frame 410, a scissor-type bracket 420, and a slide rail 440. The U-shaped frame 410 is fixedly connected to one end of the base 220, and an adjusting screw 411 is rotatably connected between the two arms of the U-shaped frame 410. The adjusting screw 411 is a positive and negative thread screw. The scissor-type bracket 420 includes multiple support rods. Two support rods located at one end of the scissor-type bracket 420 are rotatably connected to one end of a support plate, and a screw-fitting cylinder 421 is fixedly connected to one end of each of the two support plates. The inner walls of the two screw-fitting cylinders 421 are screwed into the outer walls of the adjusting screw 411. Next, one side of the slide rail 440 is fixedly connected to one end of the other side of the connecting plate 320 located at the bottom. The slide rail 440 includes two parallel slide tracks, and each of the two slide tracks is slidably engaged with a movable plate 441. One end of each of the two support rods located at the other end of the scissor bracket 420 is rotatably connected to one end of each of the two movable plates 441. One end of the U-shaped frame 410 is fixedly connected to a motor box 430, and a power motor is installed inside the motor box 430. The motor end of the power motor is fixedly connected to one end of the adjusting screw 411.

[0047] In specific implementation, the scissor bracket 420 is existing technology and will not be described in detail here. After the multiple boxes 310 separate and push the obstruction upward, the power motor is started to drive the adjusting screw 411 to rotate. The adjusting screw 411 is a forward and reverse thread screw, so that when the adjusting screw 411 rotates, it can drive the two rotating cylinders 421 to move towards or away from each other. This causes the two rotating cylinders 421 to drive the scissor bracket 420 to extend or retract, so that the bottom connecting plate 320 moves to the position where the corn stalk was last sensed. The power motor can be controlled to start and stop by a motor controller, which is existing technology and will not be described in detail here. This allows the scissor bracket 420 to control the position of the bottom connecting plate 320. The bottom connecting plate 320 and the contact sensing PCB board inside the bottom box 310 can be connected to power through wires. The wires can be glued and laid on the scissor bracket 420.

[0048] Example 2

[0049] Based on Embodiment 1, the stability between the scissor bracket 420 and the bottommost connecting plate 320 is improved by the convex ring 422.

[0050] like Figure 6 and Figure 8 As shown, in this embodiment, the connecting plate 320 at the bottom has a slot 322 on the other side. One end of the outer wall of the multiple rotating shafts in the middle of the scissor bracket 420 is fixedly sleeved with a protruding ring 422. Any protruding ring 422 is movably engaged in the slot 322. One side of the support rod of the scissor bracket 420 has a chamfered structure.

[0051] In specific implementation, the protruding ring 422 on the central rotating shaft of the scissor bracket 420 can be inserted into the slot 322 on the lowermost connecting plate 320, thereby increasing the contact points between the scissor bracket 420 and the lowermost connecting plate 320 and improving the stability of the lowermost connecting plate 320. When the scissor bracket 420 retracts, because the support rod of the scissor bracket 420 has a chamfered structure, the edge of the support rod of the scissor bracket 420 is relatively thin, thereby forming a scissor-like structure between two adjacent support rods on the scissor bracket 420, which can cut off blades and other objects that may extend between the support rods of the scissor bracket 420.

[0052] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0053] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A detection sensor for automatic row alignment in a corn combine harvester, characterized in that, include: The frame (100) has a rotating through hole on its bottom surface; The top of the connecting box (200) is fixedly connected to the bottom surface of the frame (100). An angle detector is provided inside the connecting box (200), and the angle detector is fixedly connected to a detection shaft (210). The detection shaft (210) is rotatably sleeved inside the rotation through hole, and a base (220) is fixedly sleeved at the top of the detection shaft (210). A toggle mechanism (300) is located at one end of the base (220). The toggle mechanism (300) includes multiple vertically arranged boxes (310) arranged sequentially. Each box (310) has a connecting plate (320) on one side. Each connecting plate (320) has multiple position sensing elements (321) fixedly connected to one side. Each box (310) has a contact sensing PCB board inside. Each contact sensing PCB board is electrically connected to multiple position sensing elements (321) on adjacent connecting plates (320). Except for the connecting plate (321) located at the bottom, the other two connecting plates (320 and 321) are connected to each other. In addition to 0), one side of each of the other connecting plates (320) is fixedly connected to one side of the adjacent box (310), and two ends of the other side of each of the multiple boxes (310) are fixedly connected to sleeve rods (330). Except for the bottom square box (310), the two sleeve rods (330) on the other boxes (310) are rotatably connected to support arms (331). One end of each support arm (331) is provided with a circular hole. The inner sidewall of the circular hole at one end of the two support arms (331) on any box (310) is rotatably connected to the outer sidewall of the two sleeve rods (330) on the lower box (310). The driving mechanism (400) is located on one side of the bottom box (310).

2. The detection sensor for automatic row alignment in a corn combine harvester according to claim 1, characterized in that, The actuation mechanism (400) includes: A U-shaped frame (410) is fixedly connected to one end of the base (220), and an adjusting screw (411) is rotatably connected between the two arms of the U-shaped frame (410). The adjusting screw (411) is a positive and negative thread screw. The scissor bracket (420) includes multiple support rods. Two support rods located at one end of the scissor bracket (420) are rotatably connected to support plates at one end, and two support plates are fixedly connected to screw cylinders (421) at one end. The inner sidewalls of the two screw cylinders (421) are screwed to the outer sidewall of the adjusting screw (411). The slide rail (440) is fixedly connected on one side to the other end of the connecting plate (320) located at the bottom. The slide rail (440) includes two parallel slide tracks, and each slide track is slidably engaged with a movable plate (441). One end of each of the two support rods located at the other end of the scissor bracket (420) is rotatably connected to one end of each of the two movable plates (441).

3. The detection sensor for automatic row alignment in a corn combine harvester according to claim 2, characterized in that, A reset spring (221) is fixedly connected to the outer wall of the base (220), and one end of the reset spring (221) is fixedly connected to an inner wall of the frame (100) through a connector.

4. The detection sensor for automatic row alignment in a corn combine harvester according to claim 3, characterized in that, One end of the base (220) is fixedly connected to a fixing rod (340), and one end of the fixing rod (340) is rotatably connected to a guide rail (341). The other side of the two boxes (310) located at the top and bottom are fixedly connected to sliders (311), and the two sliders (311) are slidably engaged inside the guide rail (341).

5. The detection sensor for automatic row alignment in a corn combine harvester according to claim 4, characterized in that, The guide rail (341) is equipped with a rotating plate (350), and a rotating hole is opened at one end of the rotating plate (350). The inner side wall of the rotating hole is rotatably sleeved with the outer side wall of the connecting box (200). A locking block (342) is slidably engaged inside the guide rail (341), and a connecting shaft is rotatably connected to one end of the locking block (342). A pneumatic push rod (351) is fixedly connected to the top surface of the other end of the rotating plate (350), and the movable end of the pneumatic push rod (351) is fixedly connected to one end of the connecting shaft.

6. The detection sensor for automatic row alignment in a corn combine harvester according to claim 2, characterized in that, Except for the bottommost box (310), each of the other boxes (310) has a contact module (312) fixedly connected to one end of its bottom surface. Except for the topmost box (310), each of the other boxes (310) has a power supply module (313) fixedly connected to the other end of its top surface. The contact modules (312) on two adjacent boxes (310) are movably connected to the power supply module (313).

7. The detection sensor for automatic row alignment in a corn combine harvester according to claim 6, characterized in that, Except for the topmost box (310), the other boxes (310) are fixedly connected to two U-shaped plates (314) at the other end of their top surfaces. The two U-shaped plates (314) on any box (310) are located on opposite sides of the adjacent power supply module (313). The top surfaces of any U-shaped plate (314) are rotatably connected to toothed rollers. The outer walls of the two toothed rollers on any U-shaped plate (314) are rotatably fitted with toothed belts (315). Two drive motors are provided below any U-shaped plate (314). Each drive motor is located inside the adjacent box (310), and the motor end of each drive motor is fixedly connected to one end of a toothed roller on the adjacent U-shaped plate (314).

8. The detection sensor for automatic row alignment in a corn combine harvester according to claim 7, characterized in that, One end of the U-shaped frame (410) is fixedly connected to a motor box (430), and a power motor is installed inside the motor box (430). The motor end of the power motor is fixedly connected to one end of the adjusting screw (411).

9. The detection sensor for automatic row alignment in a corn combine harvester according to claim 2, characterized in that, The connecting plate (320) at the bottom has a slot (322) on the other side. The outer side wall of the multiple rotating shafts in the middle of the scissor bracket (420) is fixedly fitted with a protruding ring (422), and any protruding ring (422) is movably engaged in the slot (322).

10. The detection sensor for automatic row alignment in a corn combine harvester according to claim 9, characterized in that, The support rods of the scissor bracket (420) all have a chamfered structure on one side.

Images