Device for improving test stability of sliding friction coefficient

Abstract

The utility model belongs to the technical field of friction coefficient testing devices, and discloses a device for improving sliding friction coefficient testing stability, which comprises a sliding friction tester and a sliding block, an adjustable balancing weight is mounted on the sliding block; the sliding friction tester comprises a bottom plate, an angle regulator is fixed at one end of the bottom plate, the top end of the angle regulator is fixed with one end of a slide way, and the other end of the slide way is connected with the tail end of the bottom plate through a rotator; and an angle adjusting hand wheel is arranged in the middle of the angle adjuster. The inclination angle of the sliding way can be adjusted, baffles are arranged on the periphery of the sliding way, and a buffer spring is arranged on the baffle at the bottom in the sliding way.

Description

Technical Field

[0001] The utility model belongs to the technical field of friction coefficient testing devices, and in particular relates to a device for improving the stability of sliding friction coefficient testing. Background Art

[0002] In existing physics teaching and basic scientific research, the method of using inclined planes and sliders to test dynamic and static friction coefficients is simple and easy to understand, but it has certain limitations in terms of accuracy and stability. In particular, common problems in this method include the jamming of the slider during the sliding process and large fluctuations in the test data, which seriously affect the reliability of the experiment and the accuracy of the results.

[0003] First, when the traditional slider design is tested for the coefficient of friction, it is easy to get stuck during the sliding process due to insufficient or uneven weight distribution. This phenomenon not only affects the accurate measurement of the coefficient of friction, but also reduces the repeatability and reliability of the experiment. In addition, the inconsistent contact area between the slider and the inclined surface and the difference in contact quality further increase the fluctuation of the test data, making it difficult for the results to accurately reflect the actual coefficient of friction.

[0004] Secondly, environmental factors such as temperature, humidity, and air flow are difficult to control in traditional methods and have an adverse effect on the measurement of friction. Although these factors are considered in the experimental design, their changes are often difficult to accurately control under basic experimental settings, thus affecting the accurate measurement of the friction coefficient.

[0005] Therefore, it is necessary to improve this experimental method, mainly to improve the accuracy and repeatability of the experiment, so as to enhance the applicability of this experimental method in wider and more complex application scenarios.

[0006] Through the above analysis, the problems and defects of the prior art are: unstable movement of the slider, easy collision with obstructions around the track, insufficient stability in the measurement of the friction coefficient, and low test success rate. Utility Model Content

[0007] In view of the problems existing in the prior art, the utility model provides a device for improving the stability of sliding friction coefficient testing.

[0008] The utility model is implemented as follows: a device for improving the stability of sliding friction coefficient testing, comprising a sliding friction tester and a slider; an adjustable counterweight is installed on the slider; the sliding friction tester comprises a base plate, an angle adjuster is fixed at one end of the base plate, the top end of the angle adjuster is fixed to one end of a slideway, and the other end of the slideway is connected to the end of the base plate through a rotator; an angle adjustment handwheel is arranged in the middle of the angle adjuster.

[0009] Furthermore, the inclination angle of the slide is adjustable, baffles are arranged around the slide, and a buffer spring is arranged at the bottom baffle inside the slide.

[0010] Furthermore, the slider is located inside the slideway during testing.

[0011] Furthermore, a baffle on the side of the slideway is provided with a bracket with adjustable position, and the other end of the bracket is connected to a photoelectric gate.

[0012] Furthermore, the thin sheet at the top of the slider is located in the groove of the photoelectric gate.

[0013] Furthermore, the sliding block and the slideway are made of steel, and other materials may also be used.

[0014] In combination with the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solutions to be protected by the utility model are as follows:

[0015] First, in view of the technical problems existing in the above-mentioned prior art, some creative technical effects are brought about after solving the problems. The specific description is as follows:

[0016] 1) Improved test accuracy and reliability: By introducing an adjustable counterweight, the utility model significantly reduces the swing or jumping phenomenon of the slider during the sliding process, thereby reducing experimental errors and improving the accuracy of friction coefficient measurement. This improvement in accuracy is extremely important for data dependence in scientific research and engineering applications.

[0017] 2) Enhanced adaptability and flexibility of the experiment: The adjustable design of the counterweight block allows the experimenter to flexibly adjust the weight and center of gravity of the slider according to different experimental conditions and requirements. This feature increases the adaptability of the experiment, making the utility model widely applicable to different friction coefficient measurement scenarios, such as the presence of media such as ice water in the cross section.

[0018] 3) Reduced accidental risks during the experiment: By optimizing the stability of the slider, the utility model effectively reduces the possibility of the slider colliding with the shielding around the track, reduces the risk of damage to the experimental equipment, and ensures the smooth progress of the experimental process. This not only reduces the cost of the experiment, but also improves the safety of the experiment.

[0019] 4) Improved data repeatability: The stabilizing effect of the counterweight reduces the fluctuation of the friction coefficient caused by the unstable movement of the slider, thereby enhancing the repeatability of the experimental data. In scientific research and technological development, highly repeatable data is essential for verifying experimental results and ensuring the reliability of experimental conclusions.

[0020] 5) Simplified experimental operation process: The design of the utility model is simple and practical, easy to install and adjust, and provides an experimental tool that is easy to operate and easy to master for the experimenter. This user-friendly design not only saves experimental preparation time, but also improves experimental efficiency.

[0021] In summary, compared with the prior art, the utility model not only significantly improves the accuracy, reliability and safety of friction coefficient measurement, but also greatly improves the scope of application and efficiency of the experiment through its flexibility and ease of operation. These beneficial effects make the utility model have broad application prospects and practical value in the fields of scientific research, engineering design and education.

[0022] Second, considering the technical solution as a whole or from the perspective of the product, the technical effects and advantages of the technical solution to be protected by the utility model are described in detail as follows:

[0023] 1) Enhance the stability of the slider movement: Due to the lack of proper counterweight, the traditional slider may swing or jump during the movement due to unstable center of gravity, air resistance or slight unevenness of the track surface. This unstable movement state will lead to inaccurate friction measurement. By optimizing the design of the counterweight block, the utility model significantly improves the stability of the slider movement, thereby reducing the measurement error and improving the accuracy of the friction coefficient measurement.

[0024] 2) Reduce the risk of collision with obstacles around the track: In some experimental settings, the slider may deviate from the predetermined path due to accidental external forces or problems with the track itself, and collide with obstacles around the track. Such a collision may not only damage the experimental equipment, but may also make the experiment unable to continue. By adding a counterweight to the slider design, the utility model effectively reduces the risk of deviation from the track and collision, ensuring the smooth progress of the experiment.

[0025] 3) Improve the measurement stability of the sliding friction coefficient: The stability of the friction coefficient is crucial to obtaining accurate experimental data. In the unimproved technology, the friction coefficient may fluctuate unstably due to slight changes in experimental conditions, which poses a challenge to accurate measurement. The utility model optimizes the contact conditions between the slider and the track through the improved counterweight design, thereby making the measurement of the friction coefficient more stable and improving the reliability of the data.

[0026] 4) Avoid the bite phenomenon between the slider and the slide: In the prior art experiments, the slider may bite the slide during the sliding process due to the uneven surface of the track or the mismatch of the slider design, thereby suddenly stopping the movement or causing damage to the experimental equipment. This problem not only leads to the failure of the experiment, but may also require the experiment to be reset, increasing the time and cost of the experiment. The utility model optimizes the contact surface between the slider and the slide by improving the design of the slider and the counterweight, reduces the risk of bite caused by the uneven track, and thus improves the success rate of the experiment.

[0027] In summary, the addition of the counterweight block in the utility model not only solves the problems of insufficient stability of the slider, the risk of collision with obstructions, and insufficient stability in friction coefficient measurement, but also effectively avoids the bite phenomenon between the slider and the slideway. These improvements significantly improve the accuracy and reliability of friction coefficient measurement and the smooth progress rate of the experiment. Through these comprehensive design optimizations, the utility model provides a more accurate and stable experimental method for friction mechanics research and related application fields, effectively improves experimental efficiency and success rate, and reduces various problems that may be encountered during the experiment.

[0028] Third, as auxiliary evidence of the inventiveness of the claims of the utility model, it is also reflected in the following important aspects:

[0029] (1) The expected benefits and commercial value of the technical solution of this utility model after transformation are:

[0030] 1. Improve test accuracy and repeatability:

[0031] Design of counterweight: The slider is equipped with a removable counterweight, so that the mass of the slider can be precisely adjusted according to the experimental requirements. This design makes the experimental conditions more consistent each time, thereby significantly improving the accuracy and repeatability of the test; Reduce the impact of collisions: By optimizing the contact surface between the slider and the slide and reducing collisions during the sliding process, the error in the friction measurement can be further reduced to ensure the reliability of the experimental results; Increase the success rate of the test: By increasing the deadweight of the slider, the sliding problem caused by excessive local roughness is avoided, allowing the slider to slide down more smoothly.

[0032] 2. Improve experimental efficiency:

[0033] Quick adjustment: The counterweight can be quickly installed and removed, which is convenient for the experimenter to quickly switch between different experimental conditions, thereby greatly improving the experimental efficiency and saving experimental preparation and adjustment time.

[0034] 3. Enhanced applicability:

[0035] Multiple experimental scenarios: This design can be applied to the friction coefficient measurement of various materials and surface conditions, which increases the application range of the instrument. Whether it is educational experiments, scientific research tests, or industrial quality control, it can play an excellent role.

[0036] Business Value

[0037] 1. Improved market competitiveness:

[0038] High-precision demand: With the development of science and technology, the demand for high-precision testing instruments in various industries is growing. The implementation of this technical solution can significantly enhance the market competitiveness of sliding friction coefficient measuring instruments and meet the needs of the high-end market; Brand reputation: High-precision and high-repeatability experimental instruments help to establish brand reputation and attract more scientific research institutions, educational institutions and corporate customers.

[0039] 2. Expand market share:

[0040] Multifunctional application: The design of the counterweight enables the instrument to have a wider range of application scenarios, thereby expanding the potential customer base. Especially in the field where friction coefficient tests under various materials and different weight conditions are required, this instrument will become the first choice; Education and scientific research market: Accurate, reliable and efficient experimental equipment is an important demand of educational and scientific research institutions. This technical solution not only improves the quality of experiments, but also enhances the experimental experience of students and researchers, driving the expansion of market share.

[0041] 3. Sustainable development:

[0042] Long life and low maintenance cost: The collision between the slider and the slide is reduced, which reduces the wear of the equipment and extends the service life. The modular design of the counterweight block also makes maintenance and replacement more convenient, reducing long-term maintenance costs; Environmental benefits: Reduce material wear and waste, meet the requirements of environmental protection and sustainable development, and further enhance the market recognition of the product.

[0043] Through the realization of the above expected benefits and commercial value, this technical solution can not only improve the accuracy and efficiency of sliding friction coefficient measurement, but also bring significant market competitive advantages and economic benefits to enterprises. This will provide strong support for the company's technological innovation and market expansion in related fields.

[0044] (2) The technical solution of the utility model overcomes technical prejudice:

[0045] 1. Precision and repeatability bias:

[0046] Bias of traditional technology: In traditional sliding friction coefficient measurement, the mass of the slider is usually fixed and cannot be adjusted according to experimental requirements. This design limits the accuracy and repeatability of the experiment because the mass of the slider cannot be optimized for different experimental conditions; Improvement of new technology: The utility model introduces a detachable counterweight block to enable the mass of the slider to be adjusted according to specific experimental requirements. This can maintain consistent experimental parameters under different experimental conditions, improve the accuracy and repeatability of the test, and thus overcome this bias in traditional technology.

[0047] 2. Collision and wear bias:

[0048] Bias of traditional technology: collision and friction often occur between the slider and the slide, resulting in unstable slider movement, affecting the accuracy of friction coefficient measurement. At the same time, this also accelerates the wear of the equipment and shortens its service life; Improvement of new technology: The utility model reduces unnecessary collision and friction during the sliding process by optimizing the contact surface design between the slider and the slide. This not only improves the stability of the slider movement and the accuracy of measurement, but also prolongs the service life of the equipment, overcoming this bias in traditional technology.

[0049] Through the above technical improvements, the utility model significantly improves the performance of the sliding friction coefficient measuring instrument, and overcomes the accuracy and repeatability biases as well as the collision and wear biases in the traditional technology. These improvements make the technical solution not only innovative and practical in theory, but also show significant advantages in practical applications. Therefore, it can be considered that the technical solution of the utility model successfully overcomes the technical biases in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following is a brief introduction to the drawings required for use in the embodiments of the utility model. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0051] Figure 1 It is a schematic diagram of a sliding friction tester and a sliding block provided in an embodiment of the utility model;

[0052] Figure 2 It is a schematic diagram of the combination of a slider and a counterweight block provided in an embodiment of the utility model;

[0053] Figure 3 It is a schematic diagram of a counterweight block provided in an embodiment of the utility model;

[0054] Figure 4 It is a schematic diagram of a slider provided by an embodiment of the utility model;

[0055] Figure 5 It is a schematic diagram of a sliding friction tester provided by an embodiment of the utility model;

[0056] Figure 6 It is a rotation schematic diagram of the sliding friction tester provided by the embodiment of the utility model;

[0057] Figure 7 It is a schematic diagram of the position of the slider and the photoelectric door provided in the embodiment of the utility model;

[0058] Figure 8 This is the distribution diagram of sliding friction factor. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0060] like Figure 1 As shown, the embodiment of the utility model provides a device for improving the stability of sliding friction coefficient testing, including a sliding friction tester 1 and a slider 2; Figure 2 As shown, an adjustable counterweight 3 is installed on the slider 2; the counterweight structure is as shown in Figure 3 As shown, the slider structure is as follows Figure 4 shown.

[0061] like Figure 5 As shown, the sliding friction tester 1 includes a base plate 4, an angle adjuster 5 is fixed at one end of the base plate 4, the top of the angle adjuster 5 is fixed to one end of a slideway 6, and the other end of the slideway 6 is connected to the end of the base plate 4 through a rotator; an angle adjustment handwheel 7 is arranged in the middle of the angle adjuster 5.

[0062] The slideway 6 is surrounded by baffles 8, and the bottom baffle inside the slideway 6 is provided with a buffer spring 9. Figure 6 As shown, the inclination angle of the slideway 6 is adjustable.

[0063] Furthermore, the slider 2 is located inside the slideway 6 during testing.

[0064] like Figure 7 As shown, the side baffle of the slideway 6 is provided with a position-adjustable bracket 10 , and the other end of the bracket 10 is connected to a photoelectric gate 11 .

[0065] Furthermore, the thin sheet at the top of the slider 2 is located in the groove of the photoelectric gate 11 .

[0066] Furthermore, the slider 2 and the slideway 6 are made of steel.

[0067] According to the new utility model embodiment, the working principle of the device for improving the stability of sliding friction coefficient testing can be summarized as follows:

[0068] 1. Device composition

[0069] Sliding friction tester 1: as the main frame of the entire test system, it includes a base plate 4, an angle adjuster 5, a slideway 6, a rotator and an angle adjustment handwheel 7.

[0070] Bottom plate 4: provides a stable support for the tester.

[0071] Angle adjuster 5: installed on the bottom plate 4, used to adjust the inclination angle of the slideway 6. The adjusting hand wheel 7 is used to conveniently adjust the angle.

[0072] Slideway 6: It is the track on which the slider 2 slides. Its inclination angle is adjustable to simulate sliding friction under different conditions. Baffles 8 are arranged around the slideway 6 to prevent the slider 2 from falling off the track during the sliding process. The bottom baffle is also provided with a buffer spring 9 to provide buffering when the slider 2 hits the bottom, reducing the impact of the impact on the test results.

[0073] Slider 2: The main object of the test, on which an adjustable counterweight 3 is installed to adjust the weight of the slider 2, thereby changing the sliding friction conditions. The slider 2 and the slideway 6 are both made of steel to ensure the accuracy of the test results.

[0074] Counterweight block 3: The total weight of the slider 2 can be adjusted as needed to simulate sliding friction under different loads.

[0075] Bracket 10 and photoelectric gate 11: Bracket 10 is fixed on the side baffle of slideway 6, and its position is adjustable, and is used to fix photoelectric gate 11. Photoelectric gate 11 is used to detect the position of slider 2. Through the cooperation between the thin sheet at the top of slider 2 and the groove of photoelectric gate 11, the starting position and ending position of slider 2 on slideway 6 can be accurately recorded, so as to calculate the sliding distance of slider 2.

[0076] 2. Working Principle

[0077] Preparation: First, according to the test requirements, adjust the inclination angle of the slideway 6 through the angle adjuster 5 and fix it. Then, install a counterweight block 3 of appropriate weight on the slider 2 to simulate the required sliding friction conditions.

[0078] Start the test: Place the slider 2 at the starting position of the slideway 6, making sure that the sheet at the top of the slider 2 is in the groove of the photogate 11. Release the slider 2 and allow it to slide freely on the slideway 6.

[0079] Data recording: When the photoelectric gate 11 detects the passage of the slider 2, it records the starting position and the ending position of the slider 2, thereby calculating the sliding distance of the slider 2. At the same time, by measuring the friction force of the slider 2 during the sliding process (additional measuring equipment may be required), combined with the weight of the slider 2 and the inclination angle of the slideway 6, the sliding friction coefficient can be calculated.

[0080] Result analysis: Based on the results of multiple tests, the stability and change law of the sliding friction coefficient under different conditions can be analyzed, providing strong support for related research and applications.

[0081] The entire test process improves the stability of the sliding friction coefficient test by precisely controlling the inclination angle of the slideway 6 and the weight of the slider 2 and using the photoelectric gate 11 to accurately record the sliding distance of the slider 2.

[0082] The utility model significantly improves the reliability of the sliding friction coefficient measurement test through a series of improvements. These improvements are mainly aimed at optimizing the behavior of the slider during the sliding process, specifically including:

[0083] 1) Improvement of the swaying or jumping of the slider during its sliding process: In order to solve the swaying or jumping problem of the slider during its sliding process, the utility model proposes a counterweight design, which is an adjustable component. This design allows the overall mass of the slider to be increased and its center of gravity to be lowered by adding a counterweight according to the experimental conditions, such as when the slider has a light weight or encounters a large friction force, thereby stabilizing the movement of the slider. When the counterweight is not needed, it can be easily removed. This adjustability not only improves the adaptability of the experiment, but also ensures the smoothness of the sliding process.

[0084] 2) Reduce collision with obstructions around the track: By installing a counterweight on the slider device, the stability of the slider is increased, effectively reducing the possibility that the slider may deviate from the track due to track problems or external forces. This improvement reduces the risk of the slider colliding with obstructions around the track, avoids data errors caused by collisions, and thus improves the accuracy of the experimental results.

[0085] 3) Improve the repeatability of test data and reduce test data errors: The installation of the counterweight block significantly improves the stability of the slider during movement. By reducing the fluctuation of the friction coefficient caused by motion instability, the experimental data becomes more stable. This measure not only makes the measurement results more accurate, but also enhances the reliability and repeatability of the data.

[0086] Through the implementation of the above technical solutions, the utility model not only solves the problems of unstable movement of the slider, easy collision with the obstructions around the track, inaccurate data and poor repeatability during the measurement of the sliding friction coefficient, but also provides an improved solution with simple operation, strong adaptability and high reliability. These improvements are of great significance to improving the overall performance and efficiency of the friction coefficient measurement test.

[0087] (1) Example 1: Educational Experimental Equipment

[0088] In high school and university physics experiment courses, the utility model can be used as a high-precision friction coefficient measuring instrument. Teachers can use a counterweight to adjust the mass of the slider to demonstrate the change in friction coefficient when sliders of different masses slide on the same inclined plane. By reducing the collision between the slider and the slide, students can observe more stable and consistent experimental data, thereby better understanding the concept and influencing factors of sliding friction. The experimental results will show the sliding friction coefficient of sliders of different masses at the same inclined plane angle, and the repeatability and accuracy of the experimental data will be significantly improved.

[0089] (2) Example 2: Industrial Quality Control

[0090] In the industrial production process, strict quality control of the friction coefficient of materials is required. The utility model can be used to test the sliding friction coefficient of various material surfaces to ensure that the product meets the design requirements. It can be applied to the production and inspection of mechanical parts, especially components that require high-precision friction coefficients (such as bearings and slide rails). The friction coefficients of different materials can be accurately measured with high data repeatability, which can ensure that the produced parts meet quality standards.

[0091] (3) Example 3: Scientific research experiment

[0092] In scientific research experiments, it is often necessary to test the friction coefficient of new materials or surface treatment technologies. The utility model can meet complex scientific research needs through its high precision and adjustability. It can be applied to the research of new nanomaterials, surface coating technology, etc. Through high-precision and high-repeatability test data, researchers can more accurately evaluate the friction performance of new materials or new technologies, and provide data support for technological improvement and innovation.

[0093] Through the demonstration of specific embodiments, it can be seen that the utility model has significant creativity and technical value in practical applications, can play an important role in multiple fields, and solve the deficiencies in the prior art.

[0094] The embodiments of the present invention have achieved some positive effects during the development or use process, and indeed have great advantages over the prior art. The following content is described in conjunction with data, charts, etc. of the test process.

[0095] (1) A total of 21 groups of sliding friction coefficients of the same slider were tested without and with a counterweight, while the other test conditions remained unchanged (including the inclination angle, slider material, slideway material, and sliding height). The stability of the test data under the two test schemes was compared. Figure 8 This is the distribution diagram of sliding friction factor.

[0096] It is obvious that the test data of the counterweight group is relatively stable. This is because by adding the counterweight, the mass and inertia of the slider increase, making the contact between the slider and the inclined surface closer and more stable, reducing the influence of surface roughness and unevenness on the sliding friction coefficient. The increase in positive pressure and the smooth motion trajectory make the friction more stable, significantly reducing the fluctuation of the friction coefficient.

[0097] (2) With and without the counterweight installed, the sliding friction coefficient of the slider material with a large roughness was tested in ten groups. There were five materials in total (unpolished steel, stainless steel, aluminum alloy, POM steel, and PMMA). Each material slid down ten times with and without the counterweight installed. The other test conditions remained unchanged (including the inclination angle, slider material, slideway material, and sliding height). The test success rates under the two test schemes were compared.

[0098] Table 1 Sliding test table of different materials

[0099]

[0100] The number of successful tests with counterweights was 48, with a success rate of 96%, while the number of successful tests without counterweights was 28, with a success rate of 56%. This is because the insufficient mass of the slider leads to insufficient positive pressure and inertia, making the friction insufficient to overcome the resistance caused by surface roughness. At the same time, the rough surface increases the friction coefficient and the unevenness of resistance. The lightweight slider is easily affected by tiny bumps or depressions, resulting in unstable sliding. By adding counterweights, the mass and inertia of the slider are increased, the sliding is more stable, and the resistance caused by surface roughness can be effectively overcome, thereby significantly reducing the jamming phenomenon and improving the success rate of the experiment.

[0101] In summary, the utility model patent can obviously have great advantages in stability and test success rate. The test success rate and stability can significantly improve the test accuracy and test efficiency, and have obvious advantages compared to other products.

[0102] The above description is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention shall be covered by the protection scope of the present invention.

Claims

1. A device for improving the stability of sliding friction coefficient testing, characterized in that: It includes a sliding friction tester and a slider; an adjustable counterweight is installed on the slider; the sliding friction tester includes a base plate, an angle adjuster is fixed at one end of the base plate, the top of the angle adjuster is fixed to one end of a slideway, and the other end of the slideway is connected to the end of the base plate through a rotator; an angle adjustment handwheel is arranged in the middle of the angle adjuster.

2. The device for improving the stability of sliding friction coefficient testing according to claim 1, characterized in that: The inclination angle of the slideway is adjustable, baffles are arranged around the slideway, and a buffer spring is arranged on the bottom baffle inside the slideway.

3. The device for improving the stability of sliding friction coefficient testing as claimed in claim 1, characterized in that: The slider is located inside the slideway during testing.

4. The device for improving the stability of sliding friction coefficient testing as claimed in claim 2, characterized in that: The baffle plate on the side of the slideway is provided with a bracket with adjustable position, and the other end of the bracket is connected to a photoelectric gate.

5. The device for improving the stability of sliding friction coefficient testing as claimed in claim 4, characterized in that: The thin sheet at the top of the slider is located in the groove of the photoelectric gate.

6. The device for improving the stability of sliding friction coefficient testing as claimed in claim 1, characterized in that: The sliding block and the slideway are made of steel.

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