Agricultural machine stub height detection device

Abstract

The utility model relates to agricultural machinery detection technical field especially, relates to a kind of agricultural machine stubble height detection device, solve the height sensor in prior art is installed in the groove behind profile plate and is easily shielded and is far from actual operation surface, leading to difficult to accurately perceive ground distance change problem.A kind of agricultural machine stubble height detection device, including horizontal plate and several profile plates being set in the one side of horizontal plate, several profile plates are jointly connected with rotating rod between, the top of horizontal plate both sides are jointly connected with U-shaped frame by vertical plate, the bottom of each profile plate is connected with the lateral wall of horizontal plate by mounting plate, the bottom side of U-shaped frame is provided with height sensor.The utility model is by setting height sensor in the bottom of U-shaped frame and being equipped with adjustable mounting structure, makes it get rid of shielding and can dynamically adjust position, realizes direct, real-time detection between cutting platform and ground distance, improves the accuracy of stubble height control.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery testing technology, and in particular to a device for detecting the stubble height of agricultural machinery. Background Technology

[0002] Stubble cutting in agricultural machinery refers to the height of the stubble left after the cutting blades of agricultural machinery cut the crop stalks during harvesting. Controlling the stubble height is directly related to the smooth progress of subsequent tillage operations, the effective use of land resources, and the crop's regrowth potential. Excessively high stubble will cause crop waste and increase the difficulty of straw disposal, while excessively low stubble may damage soil structure, cause soil erosion, and even lead to accelerated wear or damage to the cutting blades.

[0003] Currently, most height sensors are installed in the through groove behind the profile plate. In complex terrain or high-speed operation conditions, the sensor is blocked by the profile plate and the installation position is far away from the actual cutting surface, making it difficult to capture the dynamic distance changes between the cutting platform and the ground in a timely manner. This information lag not only causes the feedback signal to be distorted, but also makes it difficult for the control system to accurately judge the actual stubble height, thus making it difficult to adjust the cutting platform posture in a timely manner.

[0004] Therefore, in view of the shortcomings of existing technologies, we urgently need a new type of agricultural machinery stubble height detection device to solve this problem. This new detection device should be able to break through the limitations of traditional installation methods and achieve direct and rapid perception of the ground contour. Utility Model Content

[0005] The purpose of this invention is to provide a stubble height detection device for agricultural machinery, which solves the problem that in the current mainstream technology, the height sensor is usually installed in the through groove behind the profile plate. Under complex terrain or high-speed operation conditions, the sensor is blocked by the profile plate and the installation position is far away from the actual cutting surface, making it difficult to capture the dynamic distance change between the cutting platform and the ground in time. This information lag not only causes the feedback signal to be distorted, but also makes it difficult for the control system to accurately judge the actual stubble height, thus making it difficult to adjust the cutting platform posture in time.

[0006] To achieve the above objectives, this utility model provides a stubble height detection device for agricultural machinery, comprising a horizontal plate and several contour plates disposed on one side of the horizontal plate. A rotating rod is connected to each contour plate. A U-shaped frame is connected to both sides of the top of the horizontal plate via vertical plates. The bottom of each contour plate is connected to the side wall of the horizontal plate via a mounting plate. A height sensor is disposed on one side of the bottom of the U-shaped frame, and the height sensor is connected to the bottom of the U-shaped frame via a horizontal adjustment structure. A drive structure cooperating with the horizontal adjustment structure is disposed on one side of the U-shaped frame. A movable plate is provided on one side of the bottom of the U-shaped frame, and a connecting plate is connected to the top of the height sensor. The top of the connecting plate is detachably connected to the bottom of the movable plate through a limiting structure.

[0007] Preferably, a horizontal groove is provided on one side of the bottom of the U-shaped frame, and the horizontal adjustment structure includes a sliding block slidably connected inside the horizontal groove and a lead screw rotatably connected to the inner wall of the horizontal groove, wherein the lead screw is threadedly engaged with the sliding block.

[0008] Preferably, a mounting bracket is connected to one side of the U-shaped frame, and the drive structure includes a drive motor mounted on one side of the mounting bracket and a drive gear disk and a driven gear disk arranged horizontally opposite each other on one side of the U-shaped frame. The output end of the drive motor is splinedly connected to a transmission rod, which is connected to the drive gear disk. The drive gear disk is connected to the side wall of the U-shaped frame through a rotating shaft, and the drive gear disk is meshed with the driven gear disk through a snap-fit.

[0009] Preferably, one end of the lead screw rotatably passes through the side wall of the U-shaped frame and is connected to the driven gear disk, and the bottom of the sliding block is bolted to the top of the moving plate.

[0010] Preferably, the bottom of the movable plate has a cavity, and the limiting structure includes a wedge block one disposed inside the cavity and a wedge block two fixedly connected to the top of the connecting plate and cooperating with the wedge block one.

[0011] Preferably, one side of the wedge block is connected to a compression spring along with the side wall of the U-shaped frame, and a pull rod is connected inside the compression spring. The pull rod slides through the side wall of the U-shaped frame and is connected to a pull handle.

[0012] This utility model discloses a stubble height detection device for agricultural machinery. By placing a height sensor at the bottom of a U-shaped frame and dynamically adjusting its spatial position through an adjustable structure, the sensor is freed from the physical obstruction of the contour plate and can directly face the ground for non-contact distance measurement, significantly improving the real-time performance and accuracy of the detection. Simultaneously, with the cooperation of the horizontal adjustment structure and the drive structure, the sensor's detection direction and angle can be preset or automatically adjusted according to different operating modes or terrain features, avoiding viewing angle deviations caused by fixed installation and further enhancing the system's adaptability. Furthermore, a limiting structure between the connecting plate and the moving plate enables a detachable connection, facilitating on-site maintenance and component replacement, and reducing operating costs. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0014] Figure 1This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0015] Figure 2 This is a schematic diagram of the sliding block and lead screw according to an embodiment of the present invention.

[0016] Figure 3 This is a schematic diagram of the driven gear disk and the driving gear disk of an embodiment of the present utility model.

[0017] Figure 4 This is a schematic diagram of the structure of wedge block one and wedge block two according to an embodiment of the present invention.

[0018] In the diagram: 1. Contouring plate; 2. U-shaped frame; 3. Vertical plate; 4. Horizontal plate; 5. Mounting bracket; 6. Moving plate; 7. Height sensor; 8. Sliding block; 9. Lead screw; 10. Drive motor; 11. Driven gear disk; 12. Driven gear disk; 13. Pull rod; 14. Pull handle; 15. Compression spring; 16. Wedge block one; 17. Wedge block two; 18. Connecting plate. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0020] Example 1 Please see Figure 1-4 As shown, this embodiment of an agricultural machinery stubble height detection device includes a horizontal plate 4 and several contour plates 1 disposed on one side of the horizontal plate 4. The contour plates 1 are connected together by a rotating rod. The top two sides of the horizontal plate 4 are connected together by vertical plates 3 to a U-shaped frame 2. The bottom of each contour plate 1 is connected to the side wall of the horizontal plate 4 through a mounting plate. A height sensor 7 is disposed on one side of the bottom of the U-shaped frame 2. The height sensor 7 is connected to the bottom of the U-shaped frame 2 through a horizontal adjustment structure. A drive structure that cooperates with the horizontal adjustment structure is disposed on one side of the U-shaped frame 2. A movable plate 6 is provided on one side of the bottom of the U-shaped frame 2, and a connecting plate 18 is connected to the top of the height sensor 7. The top of the connecting plate 18 is detachably connected to the bottom of the movable plate 6 through a limiting structure.

[0021] Several contour plates 1 are distributed along one side of the horizontal plate 4 and connected to a rotating rod, allowing each contour plate 1 to rotate independently around the rotating rod when encountering terrain undulations, thus conforming to the actual contour changes of the ground. Since the bottom of the contour plate 1 is connected to the side wall of the horizontal plate 4 via a mounting plate, this connection method ensures that the contour plate 1 maintains structural stability and responsiveness during its movement up and down with the terrain. Simultaneously, U-shaped frames 2 are fixedly connected to both sides of the top of the horizontal plate 4 via vertical plates 3. These U-shaped frames 2 serve as the main support frame for the entire sensor adjustment system. A movable plate 6 is located on one side of its bottom, and the height sensor 7 is detachably connected to the bottom of the movable plate 6 via a connecting plate 18 connected to its top, using a limiting structure. This ensures that the sensor can maintain stability... The fixed installation facilitates later maintenance and replacement. More importantly, the height sensor 7 is not directly rigidly fixed, but is connected to the bottom side of the U-shaped frame 2 through a horizontal adjustment structure. Furthermore, a drive structure that works in conjunction with the horizontal adjustment structure is also provided on one side of the U-shaped frame 2. When the control system receives the terrain change signal transmitted by the contour plate 1, the drive structure is activated and acts on the horizontal adjustment structure, driving the moving plate 6 and the height sensor 7 below it to adjust their position in the horizontal direction. This ensures that the height sensor 7 is always in the optimal detection angle and position under different working conditions, directly facing the actual working surface in front of or below the cutting platform, thereby continuously collecting dynamic distance data between the cutting platform and the ground, ensuring that the stubble height is maintained within the preset range.

[0022] Furthermore, a horizontal groove is provided on one side of the bottom of the U-shaped frame 2. The horizontal adjustment structure includes a sliding block 8 slidably connected inside the horizontal groove and a lead screw 9 rotatably connected to the inner wall of the horizontal groove. The lead screw 9 is threadedly engaged with the sliding block 8. Specifically, through the horizontal groove on one side of the bottom of the U-shaped frame 2, the sliding block 8 slidably connected inside the horizontal groove, and the lead screw 9 rotatably connected to the inner wall of the horizontal groove and threadedly engaged with the sliding block 8, when the drive structure drives the lead screw 9 to rotate, the lead screw 9 pushes the sliding block 8 to slide smoothly along the axial direction in the horizontal groove through the helical transmission action. This, in turn, drives the moving plate 6 and the height sensor 7, which are fixedly connected to it, to adjust their lateral positions as a whole. This achieves the effect of precise displacement control of the height sensor 7 in the horizontal direction, enabling it to dynamically adjust the detection position according to the operation requirements, avoiding detection blind spots or angle deviations caused by fixed installation, and improving the sensor's response capability and measurement accuracy to changes in the ground contour.

[0023] Furthermore, a mounting bracket 5 is connected to one side of the U-shaped frame 2. The drive structure includes a drive motor 10 mounted on one side of the mounting bracket 5 and a driving gear disk 12 and a driven gear disk 11 arranged horizontally opposite each other on one side of the U-shaped frame 2. A transmission rod is splined to the output end of the drive motor 10, and the transmission rod is connected to the driving gear disk 12. The driving gear disk 12 is connected to the side wall of the U-shaped frame 2 through a rotating shaft, and the driving gear disk 12 is engaged with the driven gear disk 11 through a snap ring. Specifically, the drive structure consists of a mounting bracket 5 connected to one side of the U-shaped frame 2, a drive motor 10 mounted on one side of the mounting bracket 5, and a horizontally opposite driving gear disk 12. The transmission rod, which is splinedly connected to the output end of the driven gear disk 11 and the drive motor 10, and the drive gear disk 12 and the driven gear disk 11 are connected by a tooth meshing connection, are configured so that when the control system starts the drive motor 10, the power is transmitted to the drive gear disk 12 through the transmission rod, and then the rotational motion is transmitted to the driven gear disk 11 through gear meshing, thereby driving the lead screw 9 connected to it to rotate synchronously. This achieves the effect of stably and efficiently transmitting the power of the drive motor 10 to the horizontal adjustment structure, realizing the automatic adjustment of the position of the height sensor 7, improving the automation level and response speed of the device, and reducing the need for manual intervention.

[0024] Furthermore, one end of the lead screw 9 rotates through the side wall of the U-shaped frame 2 and connects to the driven gear disk 11. The bottom of the sliding block 8 is bolted to the top of the moving plate 6. Specifically, by rotating one end of the lead screw 9 through the side wall of the U-shaped frame 2 and connecting it to the driven gear disk 11, and bolting the bottom of the sliding block 8 to the top of the moving plate 6, the driven gear disk 11 rotates directly, driving the lead screw 9 to rotate. This, in turn, drives the sliding block 8 to generate linear motion through the threaded pair. This motion is reliably transmitted to the moving plate 6 through the bolted connection, thereby driving the height sensor 7 to move synchronously. This achieves a simple transmission chain, a firm connection, and accurate motion transmission, ensuring stability and repeatability of the sensor position adjustment process and reducing measurement errors caused by loosening or gaps.

[0025] Furthermore, the bottom of the movable plate 6 has a cavity, and the limiting structure includes a wedge block 16 disposed inside the cavity and a wedge block 2 17 fixedly connected to the top of the connecting plate 18 and cooperating with the wedge block 16. Specifically, through the cavity at the bottom of the movable plate 6, the wedge block 16 disposed inside the cavity, and the wedge block 2 17 fixedly connected to the top of the connecting plate 18 and cooperating with the wedge block 16, when the connecting plate 18 is inserted into the cavity of the movable plate 6, the wedge block 2 17 slides in along the wedge surface and fits tightly against the wedge block 16. The self-locking characteristic of the wedge surface is used to achieve a rigid connection between the two, achieving the dual effect of quick installation and firm fixation between the height sensor 7 and the movable plate 6. This ensures the structural stability of the sensor during operation and provides a convenient disassembly and assembly method for subsequent maintenance and replacement.

[0026] Furthermore, one side of the wedge block 16 is connected to a compression spring 15 along with the side wall of the U-shaped frame 2. A pull rod 13 is connected inside the compression spring 15, and the pull rod 13 slides through the side wall of the U-shaped frame 2 and is connected to a pull handle 14. Specifically, through the compression spring 15 connecting one side of the wedge block 16 to the side wall of the U-shaped frame 2, the pull rod 13 inside the compression spring 15, and the pull rod 13 sliding through the side wall of the U-shaped frame 2 and connected to the external pull handle 14, when the height sensor 7 needs to be disassembled, the operator pulls the pull handle 14. The pull rod 13 then causes the wedge block 16 to move backward against the elastic force of the compression spring 15, disengaging the wedge block 16 from the wedge block 17 and releasing the locking state. This allows the connecting plate 18, along with the height sensor 7, to be removed as a whole, achieving convenient and quick disassembly of the sensor assembly. While maintaining connection reliability, this significantly improves maintenance efficiency and reduces the technical threshold and time cost of on-site maintenance.

[0027] Several contour plates 1 are distributed along one side of the horizontal plate 4 and connected to a rotating rod, allowing each contour plate 1 to rotate independently around the rotating rod when encountering terrain undulations, thus conforming to the actual contour changes of the ground. Since the bottom of the contour plate 1 is connected to the side wall of the horizontal plate 4 via a mounting plate, this connection method ensures that the contour plate 1 maintains structural stability and responsiveness during its movement up and down with the terrain. Simultaneously, U-shaped frames 2 are fixedly connected to both sides of the top of the horizontal plate 4 via vertical plates 3. These U-shaped frames 2 serve as the main support frame for the entire sensor adjustment system. A horizontal groove is formed on one side of its bottom, with a sliding block 8 slidably connected inside the groove. A lead screw 9 is rotatably connected to the inner wall of the horizontal groove, and the lead screw 9 and the sliding block 8 are threaded together to form a water... The U-shaped frame 2 has a leveling structure, and a mounting bracket 5 is connected to one side of the U-shaped frame 2. A drive motor 10 is mounted on one side of the mounting bracket 5. The output end of the drive motor 10 is splinedly connected to a transmission rod, which is connected to the drive gear disk 12. The drive gear disk 12 is connected to the side wall of the U-shaped frame 2 via a rotating shaft. The drive gear disk 12 is meshed with the driven gear disk 11 through a snap ring, forming a drive structure. When the control system receives the terrain change signal transmitted by the contour plate 1, it starts the drive motor 10. The power is transmitted to the drive gear disk 12 via the transmission rod, and then the rotational motion is transmitted to the driven gear disk 11 through gear meshing. The driven gear disk 11 drives one end of the lead screw 9 connected to it to rotate. After the lead screw 9 rotates, it drives the sliding block 8 to move along the horizontal groove through the threaded pair. The sliding block 8 slides smoothly axially. Its bottom is fixedly connected to the top of the moving plate 6 by bolts, thus driving the moving plate 6 to move horizontally as a whole. A cavity is provided at the bottom of the moving plate 6, inside which a wedge block 16 is installed. One side of the wedge block 16 is connected to the side wall of the U-shaped frame 2 via a compression spring 15. A pull rod 13 is provided inside the compression spring 15, sliding through the side wall of the U-shaped frame 2 and connected to an external pull handle 14. A connecting plate 18 is connected to the top of the height sensor 7, and a wedge block 2 17 that cooperates with the wedge block 16 is fixed to the top of the connecting plate 18. Under normal operating conditions, the compression spring 15 is compressed and applies a forward elastic force to the wedge block 16, causing the wedge block 16 and wedge block 2 17 to move smoothly together. The tight meshing ensures a secure lock between the connecting plate 18 and the moving plate 6, allowing the height sensor 7 to move synchronously with the moving plate 6 and maintain a stable posture. This allows for continuous collection of dynamic distance data between the cutter head and the ground. This data, after filtering, is transmitted to the agricultural machinery control system to correct the action parameters of the cutter head lifting cylinder in real time, ensuring that the stubble height is maintained within the preset range. When maintenance or replacement of the height sensor 7 is required, the operator only needs to pull the handle 14 outward. This pulls the rod 13 to move the wedge block 16 backward against the spring force of the compression spring 15, causing the wedge block 16 to disengage from the wedge block 2 17. This allows the connecting plate 18, along with the height sensor 7, to be removed from the cavity of the moving plate 6, completing a quick disassembly.

[0028] By placing the height sensor 7 at the bottom of the U-shaped frame 2 and dynamically adjusting its spatial position through an adjustable structure, the sensor is freed from the physical obstruction of the contour plate 1 and can directly face the ground for non-contact distance measurement, significantly improving the real-time performance and accuracy of the detection. The horizontal groove on one side of the bottom of the U-shaped frame 2, the sliding block 8 slidably connected therein, and the threaded screw 9 together constitute the horizontal adjustment structure. The linear movement of the sliding block 8 is achieved through helical transmission, which in turn drives the moving plate 6 and the height sensor 7 to move horizontally as a whole, achieving precise control of the sensor's lateral position and avoiding detection blind spots caused by fixed installation. The drive structure consists of a drive motor 10 mounted on the mounting frame 5, a transmission rod, a drive gear disk 12, and a driven gear disk 11. The drive gear disk 12 and the driven gear disk 11 transmit power through gear meshing. This structure ensures that the power output from the drive motor 10 can be stably and efficiently transmitted to the screw 9. The system's automation level and response speed are improved. One end of the lead screw 9 rotates through the side wall of the U-shaped frame 2 and connects to the driven gear disk 11. The bottom of the sliding block 8 is fixedly connected to the top of the moving plate 6 by bolts. This connection method makes the transmission chain simple and reliable, and the motion transmission accurate, ensuring stability and repeatability during the adjustment process. A cavity is opened at the bottom of the moving plate 6. The wedge block 16 inside cooperates with the wedge block 17 on the top of the connecting plate 18. Under the elastic force of the compression spring 15, it automatically locks. The wedge surface self-locking characteristic achieves the dual effect of quick installation and firm fixation, which not only ensures the stability of the sensor during operation, but also facilitates disassembly and assembly. Furthermore, the pull rod 13 inside the compression spring 15 passes through the side wall of the U-shaped frame 2 and connects to the external pull handle 14. The operator only needs to pull the pull handle 14 to release the locking state, realizing convenient and quick disassembly of the height sensor 7 assembly, significantly improving maintenance efficiency and reducing maintenance difficulty and time cost.

[0029] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A stubble height detection device for agricultural machinery, comprising a horizontal plate (4) and a plurality of contour plates (1) disposed on one side of the horizontal plate (4), wherein a rotating rod is connected to the plurality of contour plates (1), characterized in that, The top two sides of the horizontal plate (4) are connected to the U-shaped frame (2) through the vertical plate (3). The bottom of each of the contour plates (1) is connected to the side wall of the horizontal plate (4) through the mounting plate. A height sensor (7) is provided on one side of the bottom of the U-shaped frame (2). The height sensor (7) is connected to one side of the bottom of the U-shaped frame (2) through the horizontal adjustment structure. A drive structure that cooperates with the horizontal adjustment structure is provided on one side of the U-shaped frame (2). A movable plate (6) is provided on one side of the bottom of the U-shaped frame (2), and a connecting plate (18) is connected to the top of the height sensor (7). The top of the connecting plate (18) is detachably connected to the bottom of the movable plate (6) through a limiting structure.

2. The agricultural machinery stubble height detection device according to claim 1, characterized in that, The bottom side of the U-shaped frame (2) is provided with a horizontal groove. The horizontal adjustment structure includes a sliding block (8) that is slidably connected inside the horizontal groove and a lead screw (9) that is rotatably connected to the inner wall of the horizontal groove. The lead screw (9) is threadedly engaged with the sliding block (8).

3. The agricultural machinery stubble height detection device according to claim 1, characterized in that, The U-shaped frame (2) is connected to a mounting bracket (5) on one side. The drive structure includes a drive motor (10) mounted on one side of the mounting bracket (5) and a drive gear disk (12) and a driven gear disk (11) arranged in a horizontally opposed manner on one side of the U-shaped frame (2). The output end of the drive motor (10) is splinedly connected to a transmission rod. The transmission rod is connected to the drive gear disk (12). The drive gear disk (12) is connected to the side wall of the U-shaped frame (2) through a rotating shaft. The drive gear disk (12) is meshed with the driven gear disk (11) through a snap tooth.

4. The agricultural machinery stubble height detection device according to claim 2, characterized in that, One end of the lead screw (9) rotates through the side wall of the U-shaped frame (2) and is connected to the driven gear disk (11). The bottom of the sliding block (8) is bolted to the top of the moving plate (6).

5. The agricultural machinery stubble height detection device according to claim 1, characterized in that, The bottom of the movable plate (6) has a cavity, and the limiting structure includes a wedge block one (16) disposed inside the cavity and a wedge block two (17) fixedly connected to the top of the connecting plate (18) and cooperating with the wedge block one (16).

6. The agricultural machinery stubble height detection device according to claim 5, characterized in that, One side of the wedge block (16) is connected to the side wall of the U-shaped frame (2) by a compression spring (15), and the inside of the compression spring (15) is connected to a pull rod (13). The pull rod (13) slides through the side wall of the U-shaped frame (2) and is connected to a pull handle (14).

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