Comprehensive performance test device and test method for new material wheel

Abstract

The invention discloses a comprehensive performance test device and method for a new material wheel, the device comprises a test module and a monitoring module, the test module comprises a clamping tool and a first driving assembly connected to the clamping tool, the clamping tool is used for clamping the wheel, the first driving assembly is used for driving the clamping tool to move up and down, and the first driving assembly is used for driving the clamping tool to move up and down; a radial load is applied to the wheel; the test module further comprises a swing bottom plate arranged on the lower side of the clamping tool and a second driving assembly connected to the swing bottom plate, and the second driving assembly is used for driving the swing bottom plate to swing up and down; the monitoring module comprises at least one first displacement sensor arranged on the wheel, the at least one first displacement sensor is used for monitoring the displacement of the wheel under the load, through the sensor and motor control technology, automation of the testing process is achieved, manual intervention is reduced, the testing efficiency is improved, and the testing efficiency is improved by accurately controlling the testing condition and environment. And the consistency and repeatability of each test are ensured.

Description

Technical Field

[0001] This invention relates to the technical field of comprehensive performance testing of new material wheels, specifically to a comprehensive performance testing device and method for new material wheels. Background Technology

[0002] Wheels are a crucial load-bearing assembly in a vehicle, bearing the vertical and lateral loads of the entire vehicle. As a safety component, they affect not only the vehicle's handling performance but also its safety. Therefore, wheels must possess sufficient rigidity and fatigue strength. Wheel rigidity refers to the wheel's ability to resist deformation under external forces. Insufficient rigidity leads to significant tire deformation during driving, affecting vehicle handling and stability, and also increasing energy loss during rolling. Fatigue strength refers to the wheel's ability to withstand impact loads at a certain frequency during operation. In short, rigidity directly affects driving comfort and steering smoothness, while fatigue strength directly impacts driving safety.

[0003] For traditional aluminum alloy wheels, the production and design process, from structural design and material usage to testing methods, is very mature. However, with the successive application of high-strength steel, aluminum-magnesium alloy, and carbon fiber composite wheel, especially carbon fiber composite wheel, there are currently no testing methods and devices for this purpose. The accuracy and precision of the test results for carbon fiber composite wheel under some special usage scenarios cannot be guaranteed. Summary of the Invention This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention provides a comprehensive performance testing device and method for new material wheels, solving the problem that existing comprehensive performance testing devices for wheels are not applicable to new material carbon fiber composite wheel designs.

[0004] According to a first aspect of the present invention, a comprehensive performance testing apparatus for a new material wheel includes: The test module includes a load mechanism and a swing mechanism. The load mechanism includes a clamping fixture and a first drive assembly connected to the clamping fixture. The clamping fixture is used to clamp a wheel. The first drive assembly is used to drive the clamping fixture to move up and down to apply a radial load to the wheel. The swing mechanism includes a swing base plate disposed on the lower side of the clamping fixture and a second drive assembly connected to the swing base plate. The second drive assembly is used to drive the swing base plate to swing up and down. The monitoring module includes at least one first displacement sensor disposed on the wheel, wherein the at least one first displacement sensor is used to monitor the displacement of the wheel in the vertical direction under load.

[0005] A comprehensive performance testing device for a new material wheel according to an embodiment of the present invention has at least the following beneficial effects: This invention automates the testing process by employing high-precision sensors, data acquisition equipment, and servo motor control technology, reducing manual intervention and significantly improving testing efficiency. By using an automated system to control testing conditions and environment, it ensures the consistency and repeatability of each test. Specifically, the test module measures the load deformation of the wheel under various loads, and the swing plate simulates complex road conditions in real vehicle driving, enabling a comprehensive and reliable integrated performance test device for new material wheels.

[0006] According to some embodiments of the present invention, the first drive assembly is a hydraulic cylinder structure, and a linear bearing is connected between the first drive assembly and the clamping fixture, the linear bearing coinciding with the axis of the first drive assembly.

[0007] According to some embodiments of the present invention, at least one of the first displacement sensors is disposed at the axle of the wheel for monitoring the displacement of the axle of the wheel in the vertical direction under load.

[0008] According to some embodiments of the present invention, the monitoring module further includes at least one second displacement sensor, which is used to monitor the lateral displacement of the wheel.

[0009] According to some embodiments of the present invention, the swing base plate is movably configured to swing around an axis, the second drive component is a hydraulic cylinder structure, and the output end of the second drive component is connected to one end of the swing base plate to drive the swing base plate to swing up and down around an axis.

[0010] According to some embodiments of the present invention, a data acquisition module is provided, which is used to receive monitoring data from the first displacement sensor and calculate the displacement of the wheel in the vertical direction under load.

[0011] According to a second aspect of the present invention, a comprehensive performance testing method for a new material wheel is applicable to the aforementioned comprehensive performance testing apparatus, comprising mounting the wheel onto the clamping fixture; The first drive assembly is started while the second drive assembly remains stationary, and a stiffness test is performed on the wheel. The first drive assembly and the second drive assembly are started simultaneously to conduct a durability test on the wheel.

[0012] According to some embodiments of the present invention, the step of controlling the first drive assembly to start while the second drive assembly remains stationary, and performing a stiffness test on the wheel, includes: Control the first drive assembly to apply load to the wheel; The load is controlled to gradually increase from zero to the maximum load at a preset load change rate, and then gradually decrease to zero at the same load change rate. The first displacement sensor is controlled to measure the load deformation of the wheel; The stiffness of the wheel is calculated based on the load and the load deformation.

[0013] According to some embodiments of the present invention, calculating the stiffness of the wheel based on the load and the load deformation includes: Plot a scatter plot of the stiffness and the load deformation, and perform a first-order linear fit on the scatter plot to obtain a fitted line; The slope of the fitted line is obtained as the value of the stiffness change of the wheel.

[0014] According to some embodiments of the present invention, the simultaneous activation of the first drive component and the second drive component to perform a durability test on the wheel includes: acquiring actual vehicle sway data and actual vehicle wheel load data obtained from actual vehicle sampling; The first drive assembly is controlled to apply a load of the same frequency and magnitude to the wheels based on the actual vehicle wheel load data; The second drive component is controlled to drive the swing plate to swing up and down according to the actual vehicle swing data, and the swing angle and swing frequency of the swing plate are consistent with the actual vehicle swing data. Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 A schematic diagram of the structure of the test module of an embodiment of a comprehensive performance testing device for a new material wheel provided by the present invention; Figure 2 A schematic diagram of the swing mechanism in one embodiment of a comprehensive performance testing device for a new material wheel provided by the present invention; Figure 3 A schematic diagram of the monitoring module of an embodiment of a comprehensive performance testing device for a new material wheel provided by the present invention; Figure 4 A schematic flowchart of an embodiment of a comprehensive performance testing method for a new material wheel provided by the present invention; Figure 5 A flowchart illustrating step S200 of an embodiment of a comprehensive performance testing method for a new material wheel provided by the present invention. Figure 6A flowchart illustrating step S240 of an embodiment of a comprehensive performance testing method for a new material wheel provided by the present invention. Figure 7 The present invention provides a comprehensive performance testing method for a new material wheel, and a schematic flowchart of step S300 of one embodiment.

[0016] Icon labels: Test module 100; load mechanism 110; clamping fixture 111; first drive assembly 112; swing mechanism 120; swing base plate 121; second drive assembly 122; Monitoring module 200; first displacement sensor 210; second displacement sensor 220; Wheel 300. Detailed Implementation

[0017] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0018] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to 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 of this invention.

[0019] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0020] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0021] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are some embodiments of the present invention, not all embodiments.

[0022] The wheel (300mm) is a crucial load-bearing assembly in a vehicle, bearing the vertical and lateral loads of the entire vehicle. As a safety component, it affects not only the vehicle's handling performance but also its safety. Therefore, it must possess sufficient rigidity and fatigue strength. Wheel rigidity refers to the wheel's ability to resist deformation under external forces. Insufficient rigidity leads to significant tire deformation during driving, affecting vehicle handling and stability, and increasing energy loss during rolling. Fatigue strength refers to the wheel's ability to withstand impact loads at a certain frequency during operation. In short, rigidity directly affects driving comfort and steering smoothness, while fatigue strength directly impacts driving safety.

[0023] For traditional aluminum alloy wheels 300, the production and design process, from structural design and material usage to testing methods, is very mature. However, with the successive application of high-strength steel, aluminum-magnesium alloy and carbon fiber composite wheel 300, especially carbon fiber composite wheel 300, there are currently no testing methods and testing equipment for this, and the accuracy and precision of the test results of carbon fiber composite wheel 300 under some special usage scenarios cannot be guaranteed. To address the aforementioned issues, this invention proposes a comprehensive performance testing device and method for a new material wheel 300, which solves the problem that existing comprehensive performance testing devices for wheel 300 are not applicable to the new material carbon fiber composite wheel 300.

[0024] refer to Figures 1 to 7 The following are embodiments of the comprehensive performance testing device and method for a new material wheel 300 of the present invention: Reference Figures 1 to 3 As shown, a comprehensive performance testing device for a new material wheel 300 according to an embodiment of the present invention includes a testing module 100 and a monitoring module 200.

[0025] The test module 100 includes a load mechanism 110 and a swing mechanism 120. The load mechanism 110 is used to apply a radial load to the stationary wheel 300, thereby simulating the working condition of the wheel 300 when the actual vehicle is stationary, and obtaining the static stiffness of the wheel 300. The load mechanism 110 includes a clamping fixture 111 and a first drive assembly 112 connected to the clamping fixture 111. The clamping fixture 111 is used to clamp the wheel 300, and the first drive assembly 112 is used to drive the clamping fixture 111 to move up and down to apply a radial load to the wheel 300. The swing mechanism 120 includes a swing base plate 121 disposed on the lower side of the clamping fixture 111 and a second drive assembly 122 connected to the swing base plate 121. The second drive assembly 122 is used to drive the swing base plate 121 to swing up and down.

[0026] The monitoring module 200 includes at least a first displacement sensor 210 disposed on the wheel 300, which is used to monitor the deformation of the wheel 300 in the vertical direction under load.

[0027] In this embodiment of the invention, a radial load is applied to the wheel 300 by the first drive assembly 112. The load can be applied stably and accurately. The displacement of the wheel 300 under the load is monitored by the first displacement sensor 210. By combining the position movement of a point on the wheel 300 monitored by the first displacement sensor 210, the deformation of the wheel 300 can be obtained. By applying different loads to the wheel 300 and combining the deformation of the wheel 300 under the load, the stiffness change of the wheel 300 can be obtained.

[0028] Meanwhile, for the durability test of wheel 300, the embodiment of the present invention uses the second drive component 122 to drive the swing base plate 121 located under wheel 300 to swing, simulating the driving conditions of wheel 300 on ground with different inclinations in actual vehicle driving. At the same time, the first drive component 112 applies a radial load to wheel 300, simulating the load applied to wheel 300 by vehicle body in actual vehicle driving, thereby fully simulating the wear of wheel 300 in real vehicle and obtaining more accurate and reliable durability test results.

[0029] Furthermore, the first drive assembly 112 is a hydraulic cylinder structure. A linear bearing is connected between the first drive assembly 112 and the clamping fixture 111. The linear bearing coincides with the axis of the first drive assembly 112. The linear bearing ensures that the force applied by the first drive assembly 112 is consistent and applied radially along the wheel 300. During the test, the stiffness change direction remains in the same direction, which makes the test results more accurate.

[0030] Furthermore, regarding the position of the first displacement sensor 210, at least one first displacement sensor 210 is located at the axle of the wheel 300, which can ensure that the first displacement sensor 210 is located in the force application direction of the first drive component 112, and can better reflect the deformation of the wheel 300 compared to other positions, making it easier to calculate the stiffness of the wheel 300 in conjunction with the load.

[0031] In some other embodiments, the number and position of the first displacement sensor 210 are set according to the test requirements. For example, there are two first displacement sensors 210 and they are spaced apart in the radial direction of the wheel 300. It is only necessary to reflect the deformation of the wheel 300 in the vertical direction.

[0032] Preferably, in some embodiments, the monitoring module 200 further includes at least one second displacement sensor 220, which is used to monitor the lateral displacement of the wheel 300 as a position correction to monitor whether the wheel 300 is displaced or rotated during the stiffness test. If the value of the second displacement sensor 220 changes during the actual stiffness test, it indicates that the wheel 300 has displaced. At this time, the actual load on the wheel 300 is less than the load applied by the first drive assembly 112, and the deformation of the wheel 300 under the load does not correspond to the applied load. The stiffness test result is inaccurate, which will lead to the measured stiffness being greater than the actual stiffness. Therefore, it is necessary to conduct the stiffness test while ensuring that the value of the second displacement sensor 220 is stable.

[0033] In this embodiment of the invention, two second displacement sensors 220 are provided, and the two second displacement sensors 220 are symmetrically arranged on both sides of the first displacement sensor 210. By ensuring that the distances from the two second displacement sensors 220 to the swing base plate 121 are consistent, the wheel 300 is ensured not to rotate, the position of the two second displacement sensors 220 in the lateral direction remains unchanged, and the wheel 300 is ensured not to shift.

[0034] Regarding the specific structure of the swing mechanism 120, the swing base plate 121 is movably configured to swing around an axis. In this embodiment, the axial direction of the swing base plate 121 is consistent with the circumferential direction of the wheel 300, ensuring that the wheel 300 always remains in contact with the swing base plate 121 during the swing process, so as to better simulate the actual vehicle driving conditions and ensure the accuracy and reliability of the durability test. The second drive component 122 is a hydraulic actuation cylinder structure. The output end of the second drive component 122 is connected to one end of the swing base plate 121 to drive the swing base plate 121 to swing up and down around an axis, thereby simulating the contact between the wheel 300 and the ground on ground with different inclinations.

[0035] Furthermore, in some embodiments, the comprehensive performance test apparatus also includes a data acquisition module, which is used to receive monitoring data from the first displacement sensor 210 and calculate the displacement of the wheel 300 in the vertical direction under load, thereby facilitating the user to directly obtain displacement data, improving experimental efficiency, and optimizing the user experience of the apparatus.

[0036] Furthermore, referring to Figures 4 to 7 As shown, the present invention also includes a comprehensive performance testing method for a new material wheel 300, characterized in that it is applicable to the aforementioned comprehensive performance testing apparatus, and the comprehensive performance testing method includes: S100: Install wheel 300 onto clamping fixture 111; S200: Control the first drive assembly 112 to start, keep the second drive assembly 122 stationary, and conduct a stiffness test on the wheel 300; S300: Control the first drive assembly 112 and the second drive assembly 122 to start simultaneously to conduct a durability test on the wheel 300.

[0037] In step S100, the wheel 300 is clamped by the clamping fixture 111 to ensure that the wheel 300 does not shift during the test.

[0038] In step S200, the first drive assembly 112 is activated while the second drive assembly 122 remains stationary, and a stiffness test is performed on the wheel 300, including: S210: Control the first drive assembly 112 to apply load to the wheel 300; S220: Control the load to gradually increase from zero to the maximum load at a preset load change rate, and then gradually decrease to zero at the same load change rate; S230: Control the first displacement sensor 210 to measure the load deformation of the wheel 300; S240: Calculate the stiffness of wheel 300 based on the load and load deformation.

[0039] In step S210, the hydraulic actuation cylinder in the first drive assembly 112 is activated. The hydraulic actuation cylinder is aligned with the axis of the linear bearing and is in the same vertical direction. It acts radially on the wheel 300, so that its output end is connected to the clamping fixture 111, thereby the pressure applied by the first drive assembly 112 can be transmitted to the wheel 300.

[0040] In step S220, the first drive assembly 112 is controlled to apply a load to the wheel 300, and the load increases at a constant speed and then decreases at a constant speed. In this embodiment, the first drive assembly 112 is in force control mode, and the hydraulic cylinder is loaded from 0 kN to 0.5 kN, 1 kN, 2 kN, 4 kN, 6 kN, 8 kN and 9.8 kN at a rate of 0.1 kN / s, and then returns to 0 kN at the same rate.

[0041] In step S230, during the load change process in step S220, the first displacement sensor 210 is controlled to measure the load deformation of the wheel 300 in real time. The load deformation is the change in the distance from the first displacement sensor 210 to the swing base plate 121.

[0042] In step S240, the stiffness of wheel 300 is calculated based on the load and load deformation, including: S241: Plot a scatter plot of stiffness and load deformation, and perform a first-order linear fit on the scatter plot to obtain the fitted line; S242: Obtain the slope of the fitted line as the stiffness change value of wheel 300.

[0043] In steps S421 and S422, under radial load, the load-displacement relationship of the wheel 300 bearing satisfies the following equation: .

[0044] Where A1 is the data after displacement of the first displacement measuring instrument, in mm; A is the initial position of the first displacement measuring instrument, in mm; This indicates the applied load, expressed in kN. The relative displacement is measured by the first displacement measuring instrument. Given a wheel stiffness of 300, the wheel stiffness of 300 is obtained by the ratio of load to load displacement. An XY scatter plot of stiffness versus load displacement is plotted, and then a first-order linear fit is performed on the scatter plot. The slope of the fitted line is the value of the stiffness change of the test sample.

[0045] In step S300, the first drive assembly 112 and the second drive assembly 122 are started simultaneously to perform a durability test on the wheel 300, including: S310: acquiring actual vehicle sway data and actual vehicle wheel 300 load data obtained from actual vehicle sampling. S320: Control the first drive assembly 112 to apply a load of the same frequency and magnitude to the wheel 300 according to the actual vehicle wheel 300 load data; S330: Control the second drive component 122 to drive the swing base plate 121 to swing up and down according to the actual vehicle swing data. The swing angle and swing frequency of the swing base plate 121 are consistent with the actual vehicle swing data.

[0046] In step S310, actual vehicle sway data and actual vehicle wheel 300 load data are obtained through actual vehicle road testing. The actual vehicle sway data includes the sway angle and sway bar frequency, and the actual vehicle wheel 300 load data includes the load magnitude and frequency.

[0047] In steps S320 and S330, the first drive assembly 112 loads the wheel 300 according to the load data of the actual vehicle wheel 300. The first drive assembly 112 is in force control mode, and reciprocates pressing and pulling based on the zero force position. The second first drive assembly 112 drives the swing base plate 121 to simulate the tilting and swinging of the wheel 300 on the road surface according to the swing data of the actual vehicle.

[0048] It is understood that the contents of the above-mentioned comprehensive performance test device embodiments are all applicable to the comprehensive performance test method embodiments. The specific functions implemented by this vehicle embodiment are the same as those of the above-mentioned comprehensive performance test device embodiments, and the beneficial effects achieved are also the same as those achieved by the above-mentioned comprehensive performance test device embodiments.

[0049] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0050] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A comprehensive performance testing device for a new material wheel, characterized in that, include: The test module includes a load mechanism and a swing mechanism. The load mechanism includes a clamping fixture and a first drive assembly connected to the clamping fixture. The clamping fixture is used to clamp a wheel. The first drive assembly is used to drive the clamping fixture to move up and down to apply a radial load to the wheel. The swing mechanism includes a swing base plate disposed on the lower side of the clamping fixture and a second drive assembly connected to the swing base plate. The second drive assembly is used to drive the swing base plate to swing up and down. The monitoring module includes at least one first displacement sensor disposed on the wheel, wherein the at least one first displacement sensor is used to monitor the deformation of the wheel in the vertical direction under load.

2. The comprehensive performance testing device according to claim 1, characterized in that, include: The first drive assembly is a hydraulic cylinder structure, and a linear bearing is connected between the first drive assembly and the clamping fixture. The linear bearing coincides with the axis of the first drive assembly.

3. The comprehensive performance testing device according to claim 2, characterized in that: At least one of the first displacement sensors is disposed at the axle of the wheel for monitoring the displacement of the axle of the wheel in the vertical direction under load.

4. The comprehensive performance testing device according to claim 3, characterized in that: The monitoring module also includes at least one second displacement sensor, which is used to monitor the lateral displacement of the wheel.

5. The comprehensive performance testing device according to claim 3, characterized in that: The swing base plate is movably configured to swing around an axis. The second drive component is a hydraulic cylinder structure. The output end of the second drive component is connected to one end of the swing base plate to drive the swing base plate to swing up and down around an axis.

6. The comprehensive performance testing device according to claim 1, characterized in that, include: The data acquisition module is used to receive the monitoring data from the first displacement sensor and calculate the displacement of the wheel in the vertical direction under load.

7. A comprehensive performance testing method for a new material wheel, characterized in that, The comprehensive performance testing apparatus as described in any one of claims 1 to 6, wherein the comprehensive performance testing method comprises: The wheel is mounted on the clamping fixture; The first drive assembly is started while the second drive assembly remains stationary, and a stiffness test is performed on the wheel. The first drive component and the second drive component are started simultaneously to conduct a durability test on the wheel.

8. The comprehensive performance test method according to claim 7, characterized in that, The control of starting the first drive component and keeping the second drive component stationary, and performing a stiffness test on the wheel, includes: Control the first drive assembly to apply load to the wheel; The load is controlled to gradually increase from zero to the maximum load at a preset load change rate, and then gradually decrease to zero at the same load change rate. The first displacement sensor is controlled to measure the load deformation of the wheel; The stiffness of the wheel is calculated based on the load and the load deformation.

9. The comprehensive performance test method according to claim 8, characterized in that, The calculation of the wheel stiffness based on the load and the load deformation includes: Plot a scatter plot of the stiffness and the load deformation, and perform a first-order linear fit on the scatter plot to obtain a fitted line; The slope of the fitted line is obtained as the value of the stiffness change of the wheel.

10. The comprehensive performance test method according to claim 7, characterized in that, The method of controlling the simultaneous activation of the first drive component and the second drive component to conduct a durability test on the wheel includes: acquiring actual vehicle sway data and actual vehicle wheel load data obtained from actual vehicle sampling; The first drive assembly is controlled to apply a load of the same frequency and magnitude to the wheels based on the actual vehicle wheel load data; The second drive component is controlled to drive the swing base plate to swing up and down according to the actual vehicle swing data, and the swing angle and swing frequency of the swing base plate are consistent with the actual vehicle swing data.

Images