A detection bench system for simulating the soil compaction effects of different agricultural vehicle tires

Abstract

A detection bench system for simulating the soil compaction effects of different agricultural vehicle tires, comprising a detection bench and a tractor. A soil trough is arranged on the detection bench for containing soil, and the tractor can travel on the soil trough; a traction frame is connected to the rear of the tractor through a three-point suspension frame, and a lifting hydraulic cylinder is connected between the three-point suspension frame and the rear of the tractor. To sum up, the present invention can quickly replace test wheels of different sizes through a wheel conversion frame without manual tire disassembly, greatly improving the test efficiency. During the whole test process, personnel do not need to contact the soil, avoiding the influence on soil samples caused by factors such as human foot trampling, and ensuring the accuracy of test results; compared with traditional detection benches, the present invention has the characteristics of simple operation, can simulate the soil compaction effects of tires during forward, roll and steering processes, and can replace test tires without manual entry into the soil detection bench after a single test operation.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural machinery, and particularly relates to a test bench system for simulating the compaction effect of different agricultural vehicle tires on soil. Background Art

[0002] Simulating the compaction effect of agricultural vehicle tires on soil has important practical significance for improving the passability, operability, driver comfort during field operation of agricultural vehicles, and reducing the compaction damage of tires to soil. Traditional test benches mostly install the agricultural vehicle tires to be measured on the axle of the frame, drive the vehicle to compact the soil after being driven by a trolley, and then detect the relevant soil indicators. They cannot simulate the compaction effect of the tires during the process of side tilt or steering. After a single test operation, it is necessary to manually operate to replace the tires, which affects the soil inside the test bench and results in inaccurate measurement results. Summary of the Invention

[0003] The invention aims to provide a test bench system for simulating the compaction effect of different agricultural vehicle tires on soil, and solve the technical problem that the existing test bench cannot simulate the compaction process of the tires during the process of side tilt or steering.

[0004] To solve the above technical problems, the invention adopts the following technical solutions:

[0005] A test bench system for simulating the compaction effect of different agricultural vehicle tires on soil, including a test bench and a tractor. A soil trough is arranged on the test bench, and the soil trough is used for containing soil. The tractor can travel on the soil trough;

[0006] The rear part of the tractor is connected with a traction frame through a three-point suspension frame, and a lifting hydraulic cylinder is connected between the three-point suspension frame and the rear part of the tractor;

[0007] A hydraulic control system and an inclined arm frame are installed on the traction frame. A hydraulic motor and a wheel conversion frame are arranged at the upper end of the inclined arm frame. The wheel conversion frame is rotatably installed at the upper end of the inclined arm frame through a bearing. The hydraulic control system is connected with the hydraulic motor, and the hydraulic motor is used for controlling the rotation of the wheel conversion frame; Three groups of test wheel sets are installed on the wheel conversion frame, and the included angle between adjacent two groups of test wheel sets is 120°.

[0008] Furthermore, each group of test wheel sets includes a forward rotation motor and a vertical support frame. The end of the vertical support frame is rotatably installed on the wheel conversion frame through a bearing, and the forward rotation motor is used for driving the vertical support frame to rotate;

[0009] An electric push rod and a wheel connection block are provided on the vertical support frame. Driven by the electric push rod, the wheel connection block can slide along the vertical support frame; a lateral angle adjustment ring is hinged to the wheel connection block through a pin shaft, and the lateral angle adjustment ring can rotate around the pin shaft. A test wheel is rotatably installed on the lateral angle adjustment ring, and the lateral angle adjustment ring has an arc-shaped rack section;

[0010] A lateral angle adjustment motor is also provided on the wheel connection block. An adjustment gear is installed on the main shaft of the lateral angle adjustment motor. The adjustment gear is located inside the lateral angle adjustment ring and meshes with the arc-shaped rack section;

[0011] The diameters of the test wheels of the three groups of test wheel sets are different. The test wheels of the three groups of test wheel sets are a large test wheel, a medium test wheel, and a small test wheel respectively.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention realizes the automatic adjustment of the test wheel set through electric and hydraulic drive devices, reduces the need for manual operation, and reduces human error; Different-sized test wheels can be quickly replaced through the wheel conversion frame without manual tire disassembly, greatly improving the test efficiency. During the entire test process, personnel do not need to contact the soil, avoiding the influence on soil samples caused by factors such as human foot trampling, and ensuring the accuracy of test results; The angle and height of the test wheel can be adjusted to adapt to different types of agricultural vehicle tires, increasing the flexibility and application range of the system; By precisely controlling various parameters, more reliable data can be obtained, facilitating subsequent data analysis and model establishment, and helping to optimize the design of agricultural vehicles; Compared with traditional test benches, the present invention has the characteristics of simple operation, can simulate the compaction effect of tires on the soil during forward, roll, and steering processes, and the test tires can be replaced without manual entry into the soil test bench after a single test operation. Description of the Drawings

[0013] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0014] Figure 1 It is a schematic structural diagram of a test bench system for simulating the compaction effect of different agricultural vehicle tires on the soil according to the present invention;

[0015] Figure 2 It is a top view of a test bench system for simulating the compaction effect of different agricultural vehicle tires on the soil;

[0016] Figure 3 It is Figure 2 The cross-sectional view at A-A in

[0017] Figure 4Axonometric view of three groups of test wheel sets installed on the traction frame;

[0018] Figure 5 Front view of three groups of test wheel sets installed on the traction frame;

[0019] Figure 6 Side view of three groups of test wheel sets installed on the traction frame;

[0020] Figure 7 Top view of three groups of test wheel sets installed on the traction frame. Specific implementation mode

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] The following further describes the present invention in detail in conjunction with the embodiments.

[0023] Specific embodiment of a detection bench system for simulating the soil compaction effect of different agricultural vehicle tires provided by the present invention:

[0024] As Figures 1-3 shown, a detection bench system for simulating the soil compaction effect of different agricultural vehicle tires includes a detection bench 1 and a tractor 2. A soil trough 3 is provided on the detection bench 1, and the soil trough 3 is used to hold soil 4. The tractor 2 can travel on the soil trough 3;

[0025] The rear part of the tractor 2 is connected with a traction frame 7 through a three-point suspension frame 5. A lifting hydraulic cylinder 6 is connected between the three-point suspension frame 5 and the rear part of the tractor 2. When the lifting hydraulic cylinder 6 expands and contracts, it can drive the traction frame 7 to lift through the three-point suspension frame 5;

[0026] A hydraulic control system 8 and an inclined boom 9 are installed on the traction frame 7. A hydraulic motor 10 and a wheel conversion frame 11 are provided at the upper end of the inclined boom 9. Among them, the wheel conversion frame 11 is rotatably installed at the upper end of the inclined boom 9 through a bearing. The hydraulic control system 8 is connected with the hydraulic motor 10, and the hydraulic motor 10 is used to control the rotation of the wheel conversion frame 11; Three groups of test wheel sets are installed on the wheel conversion frame 11, and the included angle between adjacent two groups of test wheel sets is 120°.

[0027] As Figures 4-7As shown, each set of test wheel sets includes a forward-rotation motor 12 and a vertical support frame 13. The end of the vertical support frame 13 is rotatably installed on the wheel conversion frame 11 through a bearing. The forward-rotation motor 12 is used to drive the vertical support frame 13 to rotate so as to adjust the steering angle of the test wheel;

[0028] An electric push rod 14 and a wheel connection block 15 are arranged on the vertical support frame 13. Under the push of the electric push rod 14, the wheel connection block 15 can slide along the vertical support frame 13; a lateral angle adjustment ring 17 is hinged to the wheel connection block 15 through a pin shaft 16. The lateral angle adjustment ring 17 can rotate around the pin shaft 16. A test wheel 18 is rotatably installed on the lateral angle adjustment ring 17, and the lateral angle adjustment ring 17 has an arc-shaped rack section 19;

[0029] A lateral angle adjustment motor 20 is also arranged on the wheel connection block 15. An adjustment gear 21 is installed on the main shaft of the lateral angle adjustment motor 20. The adjustment gear 21 is located inside the lateral angle adjustment ring 17, and the adjustment gear 21 meshes with the arc-shaped rack section 19; the wheel connection block 15 rises and falls under the push of the electric push rod 14, adjusting the height of the test wheel 18, which is suitable for testing with test wheels 18 of different heights; the test wheel 18 is driven to rotate by the rotation of the lateral angle adjustment motor 20 so as to adjust the lateral inclination angle of the test wheel 18.

[0030] The diameters of the test wheels 18 in the three groups of test wheel sets 18 are different. The test wheels 18 on the three groups of test wheel shafts 18 are a large test wheel 22, a medium test wheel 23, and a small test wheel 24 respectively.

[0031] When the detection platform 1 system for simulating the soil compaction effect of different agricultural vehicle tires in this embodiment is operating, first, the towing frame 7 is lifted by the three-point suspension mechanism of the tractor 2. Then, the three groups of test wheels 18 to be tested are respectively installed on the wheel conversion frame 11. Next, the hydraulic motor 10 is controlled to rotate to drive the wheel conversion frame 11 to rotate, so that a group of test wheels 18 to be tested is perpendicular to the soil surface. Then, the forward direction angle adjustment motor and the lateral angle adjustment motor 20 are controlled to make the test wheels 18 reach the required roll angle and steering angle for simulation. Then, the three-point suspension mechanism is lowered to make the test wheels 18 contact the soil surface, and the height can be adjusted to a suitable value by the electric push rod 14. If the pressure needs to be increased, the counterweight can be placed on the towing frame 7. The tractor 2 is started to exert a compaction effect on the soil. After traveling a certain distance, if the tire operating conditions need to be changed, the towing frame can be lifted by the three-point suspension mechanism, and then the inclination angle and steering angle can be adjusted. If the test wheels 18 need to be replaced, the wheel conversion frame 11 is rotated by 120°, and then the test wheels 18 can be replaced (taking the large, medium, and small test wheels as examples in the figure). Then, the tractor 2 is lowered by the three-point suspension mechanism to continue the test. The whole process does not require personnel to contact the soil, avoiding the influence of human trampling and other factors on the soil parameters after compaction. Until the required tests are completed, the tractor 2 is lifted, and operations such as sampling and measurement of the compacted soil can be carried out, completing the simulation of the soil compaction effect during the straight-line, roll, and steering processes of different agricultural vehicle tires.

[0032] It should be noted that in this article, terms such as "including", "comprising", or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device including a series of elements not only includes those elements but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article, or device.

[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A test bench system for simulating the soil compaction effect of different agricultural vehicle tires, characterized in that: It includes a testing platform and a tractor. The testing platform is provided with a soil trough for holding soil, and the tractor can travel on the soil trough. The rear of the tractor is connected to a traction frame via a three-point suspension frame, and a lifting hydraulic cylinder is connected between the three-point suspension frame and the rear of the tractor; A hydraulic control system and an inclined arm are installed on the traction frame. A hydraulic motor and a wheel conversion frame are arranged on the upper end of the inclined arm. The wheel conversion frame is rotatably installed on the upper end of the inclined arm through a bearing. The hydraulic control system is connected to the hydraulic motor. The hydraulic motor is used to control the rotation of the wheel conversion frame. Three test wheel groups are installed on the wheel conversion frame. The angle between two adjacent test wheel groups is 120°. Each test wheel set includes a forward direction rotating motor and a vertical support frame, the end of the vertical support frame is rotatably mounted on the wheel conversion frame through a bearing, and the forward direction rotating motor is used to drive the vertical support frame to rotate; An electric push rod and a wheel connection block are provided on the vertical support frame. Under the push of the electric push rod, the wheel connection block can slide along the vertical support frame; a lateral angle adjustment ring is hinged on the wheel connection block through a pin shaft, and the lateral angle adjustment ring can rotate around the pin shaft. A test wheel is rotatably mounted on the lateral angle adjustment ring, and the lateral angle adjustment ring has an arc-shaped rack segment; A lateral angle adjustment motor is also provided on the wheel connection block, an adjustment gear is installed on the main shaft of the lateral angle adjustment motor, the adjustment gear is located in the lateral angle adjustment ring, and the adjustment gear is meshed with the arc-shaped rack segment; The test wheels of the three test wheel sets have different diameters. The test wheels of the three test wheel sets are respectively a large test wheel, a medium test wheel and a small test wheel.

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