A precision testing device for a seed metering device of a seeding machine

Abstract

The application relates to the technical field of agricultural machinery vibration test, in particular to a seeding machine seed dispenser precision detection test device, which comprises a base, a conveying belt driven by an independent power source is arranged on the bottom outer wall of the base, a control unit is arranged on the outer wall of the base, and a vibration mechanism and an auxiliary mechanism are arranged on the base. The auxiliary mechanism is arranged, the speed of an adjusting motor is changed, the size of wind power can be regulated, the fan and the vibration mechanism can be independently switched, the variable options are increased, the reliability of the device result is further improved, in addition, the steering motor drives the rotation of the steering frame, the wind direction can be adjusted, meanwhile, the steering frame drives the rotation of the linkage sleeve through the mounting frame, the linkage sleeve drives the rotation of the irregular ratchet wheel around the mounting shaft, the horizontal vibration direction of the vibration mechanism is adjusted, the complexity of field operation is further simulated, and the reliability of the detection result is improved.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery vibration testing technology, and in particular to a precision testing device for seed metering devices of seeders. Background Technology

[0002] The seed metering device is the core working component of a seeder. Its core function is to accurately separate and transport the seeds in the seed storage box into the seed furrow according to the agronomic requirements of quantity, spacing, and depth. It is a key device that determines the uniformity of sowing, the consistency of plant spacing, and the germination rate. It is widely used in the mechanized sowing of crops such as grains, vegetables, and oilseeds. Common types include air suction type, spoon wheel type, eye type, and centrifugal type. Affected by factors such as ground bumps, the operation of agricultural machinery engines, and vibration of transmission mechanisms, the seed metering device will vibrate as it moves in the field with the seeder. This vibration will directly affect its seed metering accuracy. Therefore, it is necessary to simulate the actual vibration conditions in the field through vibration tests to verify and optimize the structure and performance of the seed metering device.

[0003] Existing technologies offer only a single operating condition simulation, which is disconnected from actual field conditions. Most experimental devices can only simulate single-dimensional vibrations with fixed frequencies and amplitudes, failing to reproduce the complex vibration environment during field operations. They also struggle to accurately simulate dynamic vibration scenarios at different operating speeds, resulting in discrepancies between experimental results and actual field applications, thus limiting their guiding value for seed metering device optimization. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a precision testing device for seed metering devices in seeders. This invention utilizes an auxiliary mechanism to control wind speed by adjusting the rotational speed of the regulating motor. The fan and vibration mechanism can be switched independently, increasing the number of variable options and further improving the reliability of the device's results. Furthermore, the wind direction is adjustable by driving the bogie to rotate via a steering motor. Simultaneously, the bogie drives the linkage sleeve to rotate via the mounting frame, causing the linkage sleeve to drive an irregular ratchet to rotate around the mounting shaft, thereby adjusting the horizontal vibration direction of the vibration mechanism. This further simulates the complexity of field operations and improves the reliability of the testing results.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a precision testing device for a seeder seed metering device, comprising a base, a conveyor belt driven by an independent power source being provided on the bottom outer wall of the base, a control unit being provided on the outer wall of the base, a vibration mechanism and an auxiliary mechanism being provided on the base, the vibration mechanism including a horizontal floating frame slidably inserted into the top of the base, a transmission mechanism being provided on the horizontal floating frame, and a vertical floating frame slidably inserted into the outer wall, the seed metering device body being mounted on the vertical floating frame, and multiple industrial cameras being provided on the outer wall of the base, the auxiliary mechanism including a bogie being rotatably mounted on the bottom of the base, and a drive mechanism being movably provided on the top of the bogie in conjunction with the transmission mechanism.

[0006] Preferably, the drive mechanism includes a drive shaft, an irregular ratchet, and a first inclined block, wherein the drive shaft is rotatably connected to the outer wall of the bogie and is coaxially distributed with the irregular ratchet, a second inclined block is slidably sleeved on the outer wall of the drive shaft and abuts against the first inclined block, and an adjustment motor for driving the drive shaft is installed on the outer wall of the bogie.

[0007] Preferably, the auxiliary mechanism includes a mounting bracket slidably connected to the outer wall of the bogie, a linkage sleeve rotatably connected to the outer wall of the irregular ratchet and sleeved on the outer wall of the first inclined block, the mounting bracket slidably connected inside the linkage sleeve, the second inclined block rotatably connected to the outer wall of the mounting bracket, a wind cover provided on the outer wall of one end of the bogie, an electric push rod installed on the outer wall of the bogie, the output end of the electric push rod fixed to the outer wall of the mounting bracket, a steering motor for driving the bogie to rotate installed on the bottom outer wall of the base, and a fan located inside the wind cover installed on the main shaft of the adjusting motor.

[0008] Preferably, a baffle plate is rotatably connected to the outer wall of the wind hood near the seed metering device body, and several through holes are opened on the outer walls of both the wind hood and the baffle plate.

[0009] Preferably, the top of the base is provided with a circular mounting groove, the horizontal floating frame is slidably inserted into the mounting groove, and a number of equidistantly distributed springs are provided between the outer ring wall of the horizontal floating frame and the inner ring wall of the mounting groove.

[0010] Preferably, the transmission mechanism includes a steering block rotatably connected to the bottom outer wall of the horizontal floating frame, an irregular ratchet rotatably connected to the outer wall of the steering block, a plurality of pulleys abutting against the irregular ratchet on the bottom outer wall of the vertical floating frame, a first inclined block fixed on the outer wall of the irregular ratchet, an installation shaft fixedly installed at the bottom of the horizontal floating frame, the steering block rotatably sleeved on the outer wall of the installation shaft, and a plurality of pulleys equidistantly distributed around the installation shaft.

[0011] Preferably, the main shaft of the regulating motor is fixedly connected to the transmission shaft, a limit groove is formed on the outer wall of the transmission shaft along the axial direction, and a limit block is provided on the outer wall of the second inclined block, which is slidably inserted into the limit groove.

[0012] Preferably, a vibration motor is installed on the outer wall of the horizontal floating frame, a vibration sensor is installed on the outer wall of the vertical floating frame, a grooved wheel is rotatably installed inside the seed metering device body, and a seeding motor for driving the grooved wheel to rotate is installed on the outer wall. The industrial camera, vibration motor, vibration sensor, steering motor, electric push rod, adjusting motor and seeding motor are all electrically connected to the control unit. Multiple industrial cameras are located above the conveyor belt and on the side of the seed metering device body, respectively.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. This invention, through its vibration mechanism, enables the seed metering device to undergo multi-directional composite vibration via a horizontal and vertical floating frame and a vibration motor, thereby simulating field operation. By changing the direction of the motor, the horizontal and vertical vibrations can be switched, allowing the horizontal and vertical floating frames to independently drive the seed metering device to vibrate horizontally and vertically, achieving single-variable control and collecting multiple sets of comparative data, which helps improve the reliability of the test results. The vibration frequency can be independently adjusted by regulating the motor speed, facilitating the collection of control test data and further improving the reliability of the device.

[0015] 2. This invention uses a conveyor belt to receive and transport the seeds discharged from the seed metering device. Horizontally and vertically positioned industrial cameras capture information such as seed trajectory and sowing spacing. A control unit detects and analyzes the missed sowing rate and reseeding rate of the seed metering device under vibration. Furthermore, the conveyor belt speed is controlled to simulate the seeder's travel speed, and the vibration frequency can be adjusted by changing the motor speed, facilitating the collection of multiple sets of comparative data and improving the reliability of the detection results.

[0016] 3. This invention, through the auxiliary mechanism, can adjust the wind speed by changing the speed of the regulating motor, and the fan and vibration mechanism can switch between working independently, increasing the number of variable options and further improving the reliability of the results. In addition, the wind direction can be adjusted by driving the bogie to rotate through the steering motor. At the same time, the bogie drives the linkage sleeve to rotate through the mounting frame, which in turn drives the irregular ratchet to rotate around the mounting shaft, thereby adjusting the horizontal vibration direction of the vibration mechanism, further simulating the complexity of field operations and improving the reliability of the test results.

[0017] In summary, this device can simulate actual field conditions, improve the comparative data sets collected in the experiment, and thus improve the reliability of the test results. In addition, it can conduct wind tests simultaneously, and by changing the wind force and direction, it can simulate the impact of airflow driven by the seeder or natural wind on sowing. Compared with existing technologies, this device can achieve single control and composite simulation of multiple variables, and the related components used have simple structures, reducing production costs. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the overall structure proposed in this invention. Figure 1 ;

[0019] Figure 2 This is a three-dimensional schematic diagram of the overall structure proposed in this invention. Figure 2 ;

[0020] Figure 3 This is a three-dimensional sectional view of the base proposed in this invention;

[0021] Figure 4 This is a three-dimensional schematic diagram of the base proposed in this invention;

[0022] Figure 5 This is a three-dimensional schematic diagram of the vibration mechanism component proposed in this invention;

[0023] Figure 6 This is a three-dimensional schematic diagram of the vertical floating frame proposed in this invention;

[0024] Figure 7 This is a three-dimensional sectional view of the linkage sleeve proposed in this invention;

[0025] Figure 8 This is a three-dimensional sectional view of the horizontal floating frame proposed in this invention;

[0026] Figure 9 This is a three-dimensional schematic diagram of the auxiliary mechanism components proposed in this invention;

[0027] Figure 10 This is a three-dimensional schematic diagram of the irregular ratchet proposed in this invention.

[0028] Legend:

[0029] 1. Base; 11. Control unit; 12. Mounting slot; 13. Conveyor belt; 14. Industrial camera; 2. Horizontal floating frame; 21. Spring; 22. Vibration motor; 23. Mounting shaft; 3. Vertical floating frame; 31. Vibration sensor; 32. Pulley; 4. Steering block; 41. Irregular ratchet; 42. Linkage sleeve; 43. First inclined block; 5. Bogie; 51. Steering motor; 52. Electric push rod; 53. Mounting frame; 54. Second inclined block; 541. Limiting block; 55. Wind cover; 551. Wind baffle; 552. Through hole; 6. Adjusting motor; 61. Drive shaft; 611. Limiting slot; 62. Fan; 9. Seeder body; 91. Seeding motor. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] See Figures 1 to 10 As shown, a precision testing device for a seeder seed metering device includes a base 1, a conveyor belt 13 driven by an independent power source is provided on the bottom outer wall of the base 1, a control unit 11 is provided on the outer wall of the base 1, and a vibration mechanism and an auxiliary mechanism are provided on the base 1.

[0032] The vibration mechanism includes a horizontal floating frame 2 that is slidably inserted into the top of the base 1. A transmission mechanism is provided on the horizontal floating frame 2, and a vertical floating frame 3 is slidably inserted into the outer wall. A seed metering device body 9 is installed on the vertical floating frame 3. Multiple industrial cameras 14 are provided on the outer wall of the base 1. The auxiliary mechanism includes a steering frame 5, which is rotatably installed at the bottom of the base 1. A drive mechanism is movably provided on the top of the steering frame 5 in coordination with the transmission mechanism. A circular mounting groove 12 is opened on the top of the base 1. The horizontal floating frame 2 is slidably inserted into the mounting groove 12. Several equidistantly distributed springs 21 are provided between the outer ring wall of the horizontal floating frame 2 and the inner ring wall of the mounting groove 12.

[0033] The drive mechanism includes a drive shaft 61, an irregular ratchet 41, and a first inclined block 43. The drive shaft 61 is rotatably connected to the outer wall of the bogie 5 and is coaxially distributed with the irregular ratchet 41. A second inclined block 54 that abuts against the first inclined block 43 is slidably sleeved on the outer wall of the drive shaft 61. An adjustment motor 6 for driving the drive shaft 61 is installed on the outer wall of the bogie 5. The main shaft of the adjustment motor 6 is fixedly connected to the drive shaft 61. A limit groove 611 is formed along the axial direction on the outer wall of the drive shaft 61. A limit block 541 that is slidably inserted into the limit groove 611 is provided on the outer wall of the second inclined block 54.

[0034] The transmission mechanism includes a steering block 4 rotatably connected to the bottom outer wall of the horizontal floating frame 2. An irregular ratchet 41 is rotatably connected to the outer wall of the steering block 4. Several pulleys 32 that abut against the irregular ratchet 41 are provided on the bottom outer wall of the vertical floating frame 3. A first inclined block 43 is fixed on the outer wall of the irregular ratchet 41. An installation shaft 23 is fixedly installed at the bottom of the horizontal floating frame 2. The steering block 4 is rotatably sleeved on the outer wall of the installation shaft 23. Several pulleys 32 are equidistantly distributed around the installation shaft 23.

[0035] It should be noted that the outer wall of the conveyor belt 13 is provided with several equidistant linear grids to prevent seeds from bouncing and rolling after falling on the conveyor belt 13, which would change the sowing spacing and affect the accuracy of the test results. The industrial camera 14 is equipped with a shock-absorbing gel seat, and the whole machine is equipped with shock-absorbing feet to reduce resonance. The seed metering device body 9 to be tested is installed on the vertical floating frame 3 with bolts. The discharge port of the seed metering device body 9 is located above the conveyor belt 13.

[0036] During horizontal vibration detection, the control motor 6 rotates in the forward direction, driving the second inclined block 54 to rotate synchronously. At this time, the irregular ratchet 41 is intercepted by the pulley 32 and will not rotate. Under the combined action of the first inclined block 43 and the second inclined block 54, and the reset action of the spring 21, the first inclined block 43 drives the steering block 4 to move horizontally back and forth, thereby causing the steering block 4 to drive the horizontal floating frame 2 to vibrate horizontally. This, in turn, causes the horizontal floating frame 2 to drive the seed metering device body 9 on the vertical floating frame 3 to vibrate horizontally synchronously. At the same time, the vibration motor 22 is started to increase the randomness of the vibration parameters, causing the seed metering device body 9 to perform multi-directional composite vibration, thereby simulating the horizontal vibration state of the seeder during field operations.

[0037] During vertical vibration detection, the control motor 6 rotates in the opposite direction, driving the second inclined block 54 to rotate synchronously. At this time, the first inclined block 43 and the second inclined block 54 are engaged. The second inclined block 54 drives the irregular ratchet 41 to rotate through the first inclined block 43. Under the combined action of the irregular ratchet 41 and the pulley 32, the vertical floating frame 3 drives the seed metering device body 9 to perform vertical vibration. At the same time, the vibration motor 22 is started to improve the randomness of the vibration parameters, so that the seed metering device body 9 performs multi-directional composite vibration, thereby simulating the working state when the field ground is bumpy. The irregular ratchet 41 is equipped with inclined teeth of different tooth heights, so that the seed metering device body 9 performs vertical vibration with variable amplitude, further improving the realism of the simulated sowing conditions.

[0038] In the above process, the seed metering device body 9 is driven by the seeding motor 91 to discharge the seeds, and the seed metering device body 9 is received and transported by the conveyor belt 13. The seed trajectory and seeding spacing are captured by the horizontally and vertically set industrial cameras 14. The control unit 11 detects and analyzes the missed seeding rate and reseeding rate of the seed metering device body 9 under vibration. In addition, the speed of the conveyor belt 13 is controlled to simulate the speed of the seeder. By changing the speed of the regulating motor 6, the vibration frequency can be adjusted, the number of variables can be increased, and it is convenient to collect multiple sets of comparative data, which helps to improve the reliability of the detection results.

[0039] In summary, this invention, through the horizontal floating frame 2 and the vertical floating frame 3, combined with the vibration motor 22, can drive the seed metering device body 9 to perform multi-directional composite vibration, thereby simulating field operation conditions. By changing the direction of the adjusting motor 6, the horizontal vibration and vertical vibration can be switched, allowing the horizontal floating frame 2 and the vertical floating frame 3 to independently drive the seed metering device body 9 to perform horizontal and vertical vibrations respectively. This achieves single-variable control, collects multiple sets of comparative data, and helps improve the reliability of the test results. In particular, the vibration frequency can be independently adjusted by adjusting the speed of the adjusting motor 6, which facilitates the collection of control test data and further improves the reliability of this device.

[0040] The auxiliary mechanism includes a mounting bracket 53 slidably connected to the outer wall of the bogie 5, a linkage sleeve 42 rotatably connected to the outer wall of the irregular ratchet 41 and sleeved on the outer wall of the first inclined block 43, the mounting bracket 53 slidably connected inside the linkage sleeve 42, the second inclined block 54 rotatably connected to the outer wall of the mounting bracket 53, a wind cover 55 is provided on the outer wall of one end of the bogie 5, an electric push rod 52 is installed on the outer wall of the bogie 5, the output end of the electric push rod 52 is fixed to the outer wall of the mounting bracket 53, a steering motor 51 for driving the rotation of the bogie 5 is installed on the bottom outer wall of the base 1, a fan 62 located inside the wind cover 55 is installed on the main shaft of the adjusting motor 6, a wind baffle 551 is rotatably connected to the outer wall of the wind cover 55 near the seed metering body 9, and several through holes 552 are opened on the outer walls of the wind cover 55 and the wind baffle 551.

[0041] It should be noted that by driving the second inclined block 54 to abut and separate from the first inclined block 43 through the electric push rod 52, the vibration mechanism and the auxiliary mechanism can be linked and operated independently.

[0042] When only vibration testing is performed, the electric push rod 52 is controlled to push the mounting bracket 53 to move, so that the mounting bracket 53 drives the second inclined block 54 to abut against the first inclined block 43, and rotates the wind baffle 551, so that the wind cover 55 and the through hole 552 on the wind baffle 551 are misaligned, thereby intercepting the airflow blown out by the fan 62 in the wind cover 55, avoiding the influence of wind force on the vibration test results, realizing single variable control, and further improving the reliability of the results of this device.

[0043] Meanwhile, by controlling the extension of the electric push rod 52, the contact length of the helical teeth between the first helical block 43 and the second helical block 54 can be changed. The larger the contact length, the larger the amplitude of the horizontal vibration; the smaller the contact length, the smaller the amplitude of the horizontal vibration. This achieves the effect of independently controlling the amplitude of the horizontal vibration in the vibration mechanism, increases the number of variable options, and further improves the reliability of the results of this device.

[0044] When only wind test is performed, the electric push rod 52 drives the second inclined block 54 to separate from the first inclined block 43. At this time, the vibration mechanism will not be triggered. The wind baffle 551 is rotated so that the wind cover 55 is aligned with the through hole 552 on the wind baffle 551. The fan 62 is driven to rotate by the adjustment motor 6 so that the airflow blows towards the discharge port of the seed metering device body 9. The adjustment motor 6 is a variable speed motor. By changing the speed of the fan 62 driven by the adjustment motor 6, the wind force can be controlled. At the same time, the wind direction can be adjusted by driving the bogie 5 to rotate by the steering motor 51, simulating the working conditions under the natural wind environment in the field. With the above-mentioned conveyor belt 13 and industrial camera 14, the relevant parameters of the seed metering device body 9 under wind conditions can be collected. When it is necessary to remove the influence of wind, the wind baffle 551 is rotated so that the wind cover 55 is misaligned with the through hole 552 on the wind baffle 551, thereby blocking the airflow of the fan 62 from blowing towards the seed metering device body 9.

[0045] When vibration and wind tests need to be conducted simultaneously, the electric push rod 52 is controlled to push the mounting frame 53 to move, so that the mounting frame 53 drives the second inclined block 54 to abut against the first inclined block 43, and the wind baffle 551 is rotated so that the wind cover 55 is aligned with the through hole 552 on the wind baffle 551. At this time, the adjusting motor 6 can drive the vibration mechanism and the fan 62 to move simultaneously, further simulating complex field conditions.

[0046] By changing the speed of the regulating motor 6, the wind force can be controlled. The fan 62 and the vibration mechanism can switch between working independently or simultaneously, increasing the number of variable options and further improving the reliability of the results. In addition, the regulating motor 6 is mounted on the bogie 5, and the bogie 5 is driven to rotate by the steering motor 51, so that the wind direction can be adjusted. At the same time, the bogie 5 drives the linkage sleeve 42 to rotate through the mounting bracket 53, so that the linkage sleeve 42 drives the irregular ratchet 41 to rotate around the mounting shaft 23, thereby adjusting the horizontal vibration direction of the vibration mechanism, further simulating the complexity of field operations and improving the reliability of the test results.

[0047] In summary, this device can simulate actual field conditions, improve the comparative data sets collected in experiments, and thus enhance the reliability of test results. Furthermore, it can simultaneously conduct wind tests, simulating the impact of airflow generated by the seeder or natural wind on sowing by changing wind force and direction. Compared with existing technologies, this device can achieve single control and composite simulation of multiple variables. Moreover, the device's simulation of vibration processes has low dependence on the program system, so operators do not need to master advanced programming languages, which not only reduces the difficulty of operation for operators but also uses simple components, reducing production costs.

[0048] A vibration motor 22 is installed on the outer wall of the horizontal floating frame 2, and a vibration sensor 31 is installed on the outer wall of the vertical floating frame 3. A grooved wheel is rotatably installed inside the seed metering body 9, and a seeding motor 91 for driving the grooved wheel to rotate is installed on the outer wall. The industrial camera 14, vibration motor 22, vibration sensor 31, steering motor 51, electric push rod 52, adjusting motor 6 and seeding motor 91 are all electrically connected to the control unit 11. Multiple industrial cameras 14 are located above the conveyor belt 13 and on the side of the seed metering body 9, respectively.

[0049] It should be noted that collecting vibration parameters through vibration sensor 31 is beneficial for analyzing the working condition of the seed metering device body 9 and setting parameter variables.

[0050] Working principle:

[0051] The seed metering device body 9 to be tested is installed on the vertical floating frame 3 by bolts, and the discharge port of the seed metering device body 9 is located above the conveyor belt 13.

[0052] During horizontal vibration detection, the control adjustment motor 6 rotates in the forward direction, and the adjustment motor 6 drives the second inclined block 54 to rotate synchronously. At this time, the irregular ratchet 41 is intercepted by the pulley 32 and will not rotate. Under the combined action of the first inclined block 43 and the second inclined block 54 and the reset action of the spring 21, the first inclined block 43 drives the steering block 4 to move horizontally back and forth, so that the steering block 4 drives the horizontal floating frame 2 to vibrate horizontally, and then the horizontal floating frame 2 drives the seed metering device body 9 on the vertical floating frame 3 to vibrate horizontally synchronously. At the same time, the vibration motor 22 is started to improve the randomness of the vibration parameters, so that the seed metering device body 9 performs multi-directional composite vibration, thereby simulating the horizontal vibration state of the seeder during field operation.

[0053] During vertical vibration detection, the control motor 6 rotates in the opposite direction, driving the second inclined block 54 to rotate synchronously. At this time, the first inclined block 43 and the second inclined block 54 are engaged. The second inclined block 54 drives the irregular ratchet 41 to rotate through the first inclined block 43. Under the combined action of the irregular ratchet 41 and the pulley 32, the vertical floating frame 3 drives the seed metering device body 9 to perform vertical vibration. At the same time, the vibration motor 22 is started to improve the randomness of the vibration parameters, so that the seed metering device body 9 performs multi-directional composite vibration, thereby simulating the working state when the field ground is bumpy. The irregular ratchet 41 is equipped with inclined teeth of different tooth heights, so that the seed metering device body 9 performs vertical vibration with variable amplitude, further improving the realism of the simulated sowing conditions.

[0054] In summary, this invention, through the horizontal floating frame 2 and the vertical floating frame 3, combined with the vibration motor 22, can drive the seed metering device body 9 to perform multi-directional composite vibration, thereby simulating field operation conditions. By changing the direction of the adjusting motor 6, the horizontal vibration and vertical vibration can be switched, allowing the horizontal floating frame 2 and the vertical floating frame 3 to independently drive the seed metering device body 9 to perform horizontal and vertical vibrations, respectively. This achieves single-variable control, collects multiple sets of comparative data, and helps improve the reliability of the test results. In particular, the vibration frequency can be independently adjusted by adjusting the speed of the adjusting motor 6, which facilitates the collection of control test data and further improves the reliability of this device.

[0055] When only vibration test is performed, the electric push rod 52 is controlled to push the mounting frame 53 to move, so that the mounting frame 53 drives the second inclined block 54 to abut against the first inclined block 43, and rotates the wind baffle 551, so that the wind cover 55 and the through hole 552 on the wind baffle 551 are misaligned, thereby intercepting the airflow blown out by the fan 62 in the wind cover 55, avoiding the influence of wind force on the vibration test results, realizing single variable control, and further improving the reliability of the results of this device;

[0056] When only the wind test is conducted, the electric push rod 52 drives the second inclined block 54 to separate from the first inclined block 43, rotates the wind baffle 551 so that the wind cover 55 is aligned with the through hole 552 on the wind baffle 551, and drives the fan 62 to rotate by adjusting the motor 6 so that the airflow blows towards the discharge port of the seed metering device body 9, simulating the working conditions under the natural wind environment in the field. With the above-mentioned conveyor belt 13 and industrial camera 14, the relevant parameters of the seed metering device body 9 under the wind environment can be collected.

[0057] In summary, this device can simulate actual field conditions, improve the comparative data sets collected in the experiment, and thus improve the reliability of the test results. In addition, it can conduct wind tests simultaneously, and can simulate the impact of airflow driven by the seeder or natural wind on sowing by changing wind force and direction. Compared with existing technologies, this device can achieve single control and composite simulation of multiple variables, and the related components used have simple structures, making the device relatively low in manufacturing cost.

[0058] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A precision testing device for a seeder seed metering device, comprising a base (1), characterized in that: The base (1) is provided with a conveyor belt (13) driven by an independent power source on the bottom outer wall, a control unit (11) is provided on the outer wall of the base (1), and a vibration mechanism and an auxiliary mechanism are provided on the base (1). The vibration mechanism includes a horizontal floating frame (2) that is slidably inserted into the top of the base (1). A transmission mechanism is provided on the horizontal floating frame (2), and a vertical floating frame (3) is slidably inserted into the outer wall. A seed metering device body (9) is installed on the vertical floating frame (3). Multiple industrial cameras (14) are provided on the outer wall of the base (1). The auxiliary mechanism includes a steering frame (5). The steering frame (5) is rotatably installed at the bottom of the base (1). A drive mechanism is movably provided on the top of the steering frame (5) in conjunction with the transmission mechanism. A circular mounting groove (12) is opened on the top of the base (1). The horizontal floating frame (2) is slidably inserted into the mounting groove (12). Several equidistant circumferentially distributed springs (21) are provided between the outer ring wall of the horizontal floating frame (2) and the inner ring wall of the mounting groove (12). The drive mechanism includes a drive shaft (61), an irregular ratchet (41), and a first inclined block (43). The drive shaft (61) is rotatably connected to the outer wall of the bogie (5) and is coaxially distributed with the irregular ratchet (41). A second inclined block (54) that abuts against the first inclined block (43) is slidably sleeved on the outer wall of the drive shaft (61). An adjustment motor (6) for driving the drive shaft (61) is installed on the outer wall of the bogie (5). The auxiliary mechanism includes a mounting bracket (53) slidably connected to the outer wall of the bogie (5), a linkage sleeve (42) rotatably connected to the outer wall of the irregular ratchet (41) and sleeved on the outer wall of the first inclined block (43), the mounting bracket (53) slidably connected in the linkage sleeve (42), the second inclined block (54) rotatably connected to the outer wall of the mounting bracket (53), a wind cover (55) is provided on the outer wall of one end of the bogie (5), an electric push rod (52) is installed on the outer wall of the bogie (5), the output end of the electric push rod (52) is fixed on the outer wall of the mounting bracket (53), a steering motor (51) for driving the bogie (5) to rotate is installed on the bottom outer wall of the base (1), and a fan (62) located in the wind cover (55) is installed on the main shaft of the adjusting motor (6). The transmission mechanism includes a steering block (4) rotatably connected to the bottom outer wall of the horizontal floating frame (2). An irregular ratchet (41) is rotatably connected to the outer wall of the steering block (4). Several pulleys (32) that abut against the irregular ratchet (41) are provided on the bottom outer wall of the vertical floating frame (3). A first inclined block (43) is fixed on the outer wall of the irregular ratchet (41). An installation shaft (23) is fixedly installed at the bottom of the horizontal floating frame (2). The steering block (4) is rotatably sleeved on the outer wall of the installation shaft (23). Several pulleys (32) are equidistantly distributed around the installation shaft (23).

2. The precision testing device for a seeder seed metering device according to claim 1, characterized in that: The wind hood (55) is rotatably connected to a baffle plate (551) on the outer wall of the side near the seed metering device body (9). Several through holes (552) are opened on the outer walls of both the wind hood (55) and the baffle plate (551).

3. The precision testing device for a seeder seed metering device according to claim 1, characterized in that: The main shaft of the regulating motor (6) is fixedly connected to the transmission shaft (61). A limit groove (611) is opened on the outer wall of the transmission shaft (61) along the axial direction. A limit block (541) is provided on the outer wall of the second inclined block (54) and is slidably inserted into the limit groove (611).

4. The precision testing device for a seeder seed metering device according to claim 1, characterized in that: A vibration motor (22) is installed on the outer wall of the horizontal floating frame (2), and a vibration sensor (31) is installed on the outer wall of the vertical floating frame (3). A grooved wheel is rotatably installed inside the seed metering body (9), and a seeding motor (91) for driving the grooved wheel to rotate is installed on the outer wall. The industrial camera (14), vibration motor (22), vibration sensor (31), steering motor (51), electric push rod (52), adjustment motor (6) and seeding motor (91) are all electrically connected to the control unit (11). Multiple industrial cameras (14) are located above the conveyor belt (13) and on the side of the seed metering body (9), respectively.

Images