Soil and metal interface adhesive force measuring device

Abstract

The utility model relates to the technical field of soil adhesive force measurement, in particular to a soil and metal interface adhesive force measuring device which comprises a support frame, a driving component, a transmission component, a soil tank, a tension sensor, a metal sample and a balancing weight, the transmission assembly is arranged on the supporting frame, the soil tank is arranged on the transmission assembly, and the driving assembly and the tension sensor are arranged at the two opposite ends of the supporting frame respectively. The output end of the driving assembly is connected with the soil tank; the soil groove is filled with soil, the metal sample is placed on the soil, and the balancing weight is arranged on the metal sample; the metal sample is connected with the tension sensor; the initial position of the soil bin is close to the tension sensor. The utility model has the advantages that the motion state of the high-speed tillage soil touch component is simulated in a mode of dragging the soil tank to advance by the driving assembly, the measurement time is prolonged in a mode of lengthening the soil tank, the stable motion state is ensured to be obtained, and the test flexibility is improved and the test cost is reduced due to single-sided contact of soil and metal.

Description

Technical Field

[0001] This utility model relates to the field of soil adhesion force measurement technology, and in particular to a soil-metal interface adhesion force measurement device. Background Technology

[0002] Currently, there are relatively few methods for measuring the dynamic adhesion force at the soil-metal interface that can effectively simulate the working conditions of agricultural machinery's contact parts. Existing adhesion force measurement devices are mostly based on the pull-out method or employ an insertion design. While these can be used to observe the variation of adhesion force, both types of testing devices often suffer from the following problems:

[0003] Unsuitable for real-world working conditions: Adhesion force measurement devices based on the pull-out method typically obtain adhesion force indirectly by measuring the maximum static friction force when soil and metal materials are displaced. This method is suitable for low-speed machinery such as digging shovels, but it has significant errors in measuring dynamic adhesion force under high-speed farming environments.

[0004] Inaccurate data due to soil penetration resistance: Insertion test devices require the test material to be inserted into the soil to obtain resistance data, but the soil penetration resistance is usually much greater than the adhesion force itself, resulting in large measurement errors and making it difficult to obtain accurate adhesion force data.

[0005] Limitations of multi-faceted stress: Most testing apparatuses require the material sample to be completely submerged in the soil, resulting in the sample being subjected to stress from multiple surfaces. This characteristic makes it difficult to test materials that have only undergone single-sided modification, thus limiting its applicability.

[0006] These problems not only cause deviations between test conditions and actual working environments, but also introduce large systematic errors, ultimately significantly reducing the accuracy and reliability of adhesion force measurement data. Utility Model Content

[0007] In view of this, the present invention aims to provide a soil-metal interface adhesion force measuring device, which simulates the movement state of the soil contact component during high-speed tillage by driving the soil trough forward, and extends the measurement time by lengthening the soil trough to ensure a stable movement state. Furthermore, the adhesion force can be compared under different speed conditions by adjusting the speed of the driving component. The single-sided contact between soil and metal improves the test flexibility and reduces the test cost.

[0008] To achieve the above objectives, the present invention provides a soil-metal interface adhesion force measuring device, comprising: a support frame, a drive assembly, a transmission assembly, a soil trough, a tensile sensor, a metal sample, and a counterweight; the transmission assembly is mounted on the support frame, and the soil trough is mounted on the transmission assembly; the drive assembly and the tensile sensor are respectively mounted at opposite ends of the support frame; the output end of the drive assembly is connected to the soil trough; the soil trough is filled with soil, the metal sample is placed on the soil, and the counterweight is mounted on the metal sample; the metal sample is connected to the tensile sensor; the initial position of the soil trough is close to the tensile sensor; during the experiment, the drive assembly drives the soil trough to move away from the tensile sensor along the transmission assembly, causing relative displacement between the soil and the stationary metal sample and the counterweight; the tensile sensor monitors and records the shear force generated at the soil-metal sample interface in real time, and the shear force is the adhesion force at the soil-metal sample interface.

[0009] Furthermore, the length of the trench should be at least 2 meters.

[0010] Furthermore, the metal sample was placed on the soil near the drive assembly.

[0011] Furthermore, the support frame includes a support frame body, a reinforcing frame, and a mounting frame; the support frame body includes an upper frame, a lower frame, and multiple columns connecting the upper and lower frames; the reinforcing frame is located between the upper and lower frames, dividing the support frame body into upper and lower structures; the mounting frame is located at one end of the support frame body along its length; and the drive assembly is located on the mounting frame.

[0012] Furthermore, baffles are installed at the bottom of the lower frame and between the reinforcing frame and the lower frame. The baffles, the reinforcing frame, and the lower frame together form a collection trough for receiving soil falling from the soil trough.

[0013] Furthermore, the transmission assembly is connected to the reinforcing frame via a connecting block.

[0014] Furthermore, the transmission assembly includes two linear guides, and the soil trough is connected to the sliders of the two linear guides.

[0015] Furthermore, the output end of the drive component is connected to the soil trough via a first flexible rope.

[0016] Furthermore, the drive assembly includes a motor and a pulley, with the fixed end of the motor connected to the support frame; the output end of the motor connected to the pulley; one end of the first flexible rope is wound around the pulley, and the other end of the first flexible rope is connected to the soil trough.

[0017] Furthermore, the metal sample is connected to the tension sensor via a second flexible rope.

[0018] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0019] 1) The movement of the soil contact component during high-speed tillage is simulated by driving the soil trough forward using a drive component. Extending the soil trough lengthens the measurement time, ensuring a stable movement state. Furthermore, the adhesion force under different speed conditions can be compared by adjusting the motor speed. The single-sided contact between the soil and the metal sample not only improves experimental flexibility but also reduces experimental costs.

[0020] 2) The straight lines of the first flexible rope, the second flexible rope, and the axis of the soil trough are parallel to each other, ensuring that the transmission path of the driving force and the measuring force is consistent with the direction of movement of the soil trough. This effectively avoids additional frictional resistance and measurement errors caused by eccentric torque, thereby significantly improving the accuracy of adhesion force measurement data and the repeatability of the experiment.

[0021] 3) The collection trough, which is composed of the baffle, the reinforcing frame, and the lower frame, is used to receive soil falling from the soil trough, so as to avoid soil pollution of the surrounding equipment and site and keep the experimental environment clean.

[0022] 4) The purpose of making the length of the soil trench at least two meters is to provide sufficient shear stroke to eliminate the end effect interference at the beginning and end of the contact interface, ensure that the middle contact area reaches a uniform and stable shear stress state, and allow the interface shear force to fully develop to a stable residual strength value, thereby obtaining accurate and reliable measurement data. Attached Figure Description

[0023] The accompanying drawings, which form part of this invention, are used to provide a further understanding of this invention. The illustrative embodiments and descriptions of this invention are used to explain this invention and do not constitute an undue limitation of this invention. In the drawings:

[0024] Figure 1 This is a schematic diagram of the soil-metal interface adhesion force measuring device provided according to an embodiment of the present invention;

[0025] Figure 2 This is a structural schematic diagram of the support frame provided according to an embodiment of the present utility model.

[0026] The reference numerals in the attached drawings include: 1. Support frame; 11. Upper frame; 12. Lower frame; 13. Column; 14. Reinforcing frame; 15. Mounting bracket; 16. Connecting block; 17. Baffle; 18. Sensor mounting bracket; 2. Drive assembly; 3. Transmission assembly; 4. Soil trench; 5. Tension sensor; 6. Metal sample; 7. Counterweight. Detailed Implementation

[0027] To make the purpose, technical solution, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and do not constitute a limitation thereof.

[0028] It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0029] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] like Figures 1 to 2 As shown in the figure, the soil-metal interface adhesion force measuring device provided by this utility model includes: a support frame 1, a drive assembly 2, a transmission assembly 3, a soil trough 4, a tension sensor 5, a metal sample 6, and a counterweight 7.

[0033] The transmission assembly 3 is mounted on the support frame 1, and the soil trough 4 is mounted on the transmission assembly 3. The drive assembly 2 and the tension sensor 5 are respectively mounted at both ends of the support frame 1 along its length. The tension sensor 5 can move along the support frame 1. The output end of the drive assembly 2 is connected to the soil trough 4 via a first flexible rope. The soil trough 4 is filled with soil, and a metal sample 6 is placed on the soil. A counterweight 7 is mounted on the metal sample 6. The metal sample 6 is connected to the tension sensor 5 via a second flexible rope. The initial position of the soil trough 4 is close to the tension sensor 5.

[0034] The straight lines containing the first flexible rope, the second flexible rope, and the axis of the soil trough 4 are parallel to each other, ensuring that the transmission path of the driving force and the measuring force is consistent with the direction of movement of the soil trough. This effectively avoids additional frictional resistance and measurement errors caused by eccentric torque, thereby significantly improving the accuracy of adhesion force measurement data and the repeatability of the experiment.

[0035] In this embodiment, the end of the soil trough 4 away from the drive component 2 is connected to the support frame 1 by an elastic rope. During the movement of the soil trough 4, the elastic rope plays a buffering role.

[0036] During the experiment, the drive assembly 2 drives the soil trough 4 to move away from the tensile sensor 5 along the transmission assembly 3, causing relative displacement between the soil and the stationary metal sample 6 and the counterweight 7. The tensile sensor 5 monitors and records the shear force generated at the interface between the soil and the metal sample 6 in real time. The shear force is the adhesion force at the interface between the soil and the metal sample.

[0037] It should be noted that this device is designed to measure the adhesion between metal samples 6 of different materials and soil. Therefore, there are no specific restrictions on the material of the metal sample 6, and it can be selected according to the specific test objective.

[0038] In this embodiment, the weight of the counterweight 7 is 3kg to 6kg. This weight range ensures that the metal sample 6 is in full contact with the soil without generating excessive resistance to penetration.

[0039] Specifically, the support frame 1 includes a support frame body, a reinforcing frame 14, and a mounting frame 15. The support frame body includes an upper frame 11, a lower frame 12, and multiple columns 13 connecting the upper frame 11 and the lower frame 12. The reinforcing frame 14 is located between the upper frame 11 and the lower frame 12, dividing the support frame body into upper and lower layers. The mounting frame 15 is located at one end of the support frame body along its length. The transmission assembly 3 is connected to the reinforcing frame 14 via a connecting block 16. The drive assembly 2 is mounted on the mounting frame 15. At the end away from the mounting frame 15, a sensor mounting frame 18 for mounting the tension sensor 5 is also provided.

[0040] In this embodiment, the support frame 1 is assembled from aluminum profiles. The tension sensor 5 is fixed to the aluminum profile mounting groove of the sensor mounting bracket 18 by a nut. Loosening the nut allows the sensor to be moved along the length of the mounting groove, thereby adjusting its height.

[0041] A baffle 17 is provided at the bottom of the lower frame 12 and between the reinforcing frame 14 and the lower frame 12. The baffle 17, the reinforcing frame 14, and the lower frame 12 together form a collection trough to receive soil falling from the soil trough, so as to avoid soil pollution of surrounding equipment and site and keep the experimental environment clean.

[0042] Furthermore, the dimensions of the soil trough 4 are: length greater than or equal to 2 meters, width 0.345 meters, side plate height 0.15 meters (length direction side plate), and front and rear plate height 0.13 meters. During the test, the soil trough 4 must be filled with soil. This size provides sufficient shear stroke, the purpose of which is to: eliminate end effects at both ends of the interface, ensure uniform and stable shear stress in the intermediate contact area, and allow the shear force to fully develop to the residual strength, thereby obtaining accurate and reliable test data.

[0043] Furthermore, the metal sample 6 is placed on the soil near the drive assembly 2. This ensures maximum travel distance.

[0044] The drive assembly 2 includes a motor and a pulley. The fixed end of the motor is connected to the mounting bracket 15; the output end of the motor is connected to the pulley; one end of the first flexible rope is wound around the pulley; and the other end of the first flexible rope is connected to the soil trough 4.

[0045] The transmission assembly 3 includes two linear guides, which are connected to the reinforcing frame 14 via connecting blocks 16. The soil trough 4 is fixed to the sliders of the two linear guides by bolts. The length of the linear guides is at least twice the length of the soil trough 4 (i.e., not less than 4 meters) to meet its stroke requirements.

[0046] The working process of the soil-metal interface adhesion force measuring device is described below with reference to the accompanying drawings:

[0047] During the test, the soil trough 4 was initially positioned close to the tension sensor 5. Soil was filled into the trough 4, and the metal sample 6 was placed on the soil, near the drive assembly 2. A counterweight 7 was placed on the metal sample 6. The counterweight 7 ensured full contact between the metal sample 6 and the soil, forming the interface to be tested. The metal sample 6 was connected to the tension sensor 5 via a second flexible rope. The positions of the metal sample 6 and the counterweight 7 were fixed to prevent the generation of additional internal stress. After preparation, the tension sensor 5 and the motor were simultaneously activated, pulling the soil trough 4 forward at a set speed via the first flexible rope. During this time, relative displacement occurred between the soil and the metal sample 6 within the trough 4, with a total travel distance of 2 meters. The tension sensor 5 monitored and recorded the shear force generated at the interface between the soil and the metal sample 6 in real time; this shear force is the adhesive force at the interface between the soil and the metal sample 6.

[0048] The soil-metal interface adhesion force measuring device uses a motor to drive a soil trough 4 forward, simulating the movement of the soil-contacting components during high-speed tillage. Extending the measurement time by lengthening the soil trough 4 helps obtain a stable movement state. Furthermore, adjusting the motor speed changes the movement speed of the soil trough 4, allowing for comparison of the adhesion force under different speed conditions. This device employs a single-sided contact method between the soil and the metal sample 6, a design that not only improves the flexibility of the experiment but also effectively reduces experimental costs.

[0049] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A device for measuring the adhesion force at the soil-metal interface, characterized in that, include: Support frame, drive assembly, transmission assembly, soil trough, tension sensor, metal specimen and counterweight; The transmission assembly is mounted on the support frame, and the soil trough is mounted on the transmission assembly; the drive assembly and the tension sensor are respectively mounted at opposite ends of the support frame; the output end of the drive assembly is connected to the soil trough. The trench is filled with soil, the metal sample is placed on the soil, and the counterweight is placed on the metal sample; the metal sample is connected to the tensile sensor. The soil trough is initially positioned close to the tensile sensor. During the experiment, the drive assembly drives the soil trough to move away from the tensile sensor along the transmission assembly, causing relative displacement between the soil and the stationary metal sample and the counterweight. The tensile sensor monitors and records the shear force generated at the interface between the soil and the metal sample in real time. The shear force is the adhesion force at the interface between the soil and the metal sample.

2. The soil-metal interface adhesion force measuring device according to claim 1, characterized in that, The length of the trench is at least 2 meters.

3. The soil-metal interface adhesion force measuring device according to claim 1, characterized in that, The metal sample was placed on the soil near the drive assembly.

4. The soil-metal interface adhesion force measuring device according to claim 1, characterized in that, The support frame includes a support frame body, a reinforcing frame, and a mounting frame; the support frame body includes an upper frame, a lower frame, and a plurality of columns connecting the upper frame and the lower frame; The reinforcing frame is disposed between the upper frame and the lower frame, dividing the support frame body into upper and lower two-layer structures; the mounting frame is disposed at one end of the support frame body along its length; the driving component is disposed on the mounting frame.

5. The soil-metal interface adhesion force measuring device according to claim 4, characterized in that, A baffle is provided at the bottom of the lower frame and between the reinforcing frame and the lower frame. The baffle, the reinforcing frame, and the lower frame together form a collection trough for receiving soil falling from the soil trough.

6. The soil-metal interface adhesion force measuring device according to claim 4, characterized in that, The transmission component is connected to the reinforcing frame via a connecting block.

7. The soil-metal interface adhesion force measuring device according to claim 1 or 6, characterized in that, The transmission assembly includes two linear guide rails, and the soil trough is connected to the sliders of the two linear guide rails.

8. The soil-metal interface adhesion force measuring device according to claim 1, characterized in that, The output end of the drive component is connected to the soil trough via a first flexible rope.

9. The soil-metal interface adhesion force measuring device according to claim 8, characterized in that, The drive assembly includes a motor and a pulley; the fixed end of the motor is connected to the support frame; the output end of the motor is connected to the pulley. One end of the first flexible rope is wound around the pulley, and the other end of the first flexible rope is connected to the soil trough.

10. The soil-metal interface adhesion force measuring device according to claim 1, characterized in that, The metal sample is connected to the tension sensor via a second flexible rope.

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