Vehicle testing system and vehicle testing method

Abstract

The invention provides a vehicle testing system and a vehicle testing method. The vehicle test system comprises a test bench, a test workpiece, a force loading device, a force sensor and a torque detection device. The test workpiece comprises a first test workpiece and a second test workpiece, the first test workpiece is arranged on the test rack, the first test workpiece and the second test workpiece are used for assembling a fastener to be tested, the first test workpiece is the same as the first component, and the second test workpiece is the same as the second component. The force loading device is arranged on the test bench and is used for loading a load to the test workpiece. The force sensor is used for detecting the clamping force of the fastener to be tested. The torque detection device is used for detecting the torque of the fastener to be tested. According to the application, the actual workpiece of the vehicle is used for testing the fastener, the static clamping force and the torque of the fastener under the actual stress working condition and after stress can be effectively checked, so that the fastener process control and design check are perfected, the stability and the safety of the vehicle are improved, the structure is simple, and the cost is saved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle accessories, and in particular to a vehicle testing system and a vehicle testing method. Background Art

[0002] Vehicle fasteners are key parts of vehicles, bearing various forces and moments of vehicle driving.

[0003] However, if the design and process control of fasteners are not reasonable, the fasteners may become loose, vibrate, or even parts may become loose during use, leading to major safety accidents. Summary of the invention

[0004] The present application provides a vehicle testing system and a vehicle testing method, which can verify the design and process control of fasteners.

[0005] One aspect of the present application provides a vehicle testing system, wherein the vehicle comprises a first component, a second component and a fastener, wherein the fastener is used to connect the first component and the second component, and the vehicle testing system is used to test the stress condition of the fastener to be tested, and the vehicle testing system comprises:

[0006] Test bench;

[0007] A test workpiece, comprising a first test workpiece and a second test workpiece, wherein the first test workpiece is disposed on the test bench, and the first test workpiece and the second test workpiece are used to assemble the fastener to be tested, wherein the first test workpiece is the same as the first component, and the second test workpiece is the same as the second component;

[0008] a force loading device, provided on the test bench, for loading the second test workpiece;

[0009] A force sensor connected to the fastener to be tested, and used for detecting the clamping force of the fastener to be tested when the fastener to be tested is not loaded with a load and when the fastener to be tested is loaded with a load;

[0010] The torque detection device is used to detect the torque of the fastener to be tested when the fastener to be tested is not loaded and when the fastener to be tested is loaded.

[0011] The vehicle testing system provided in the present application uses the actual workpiece of the vehicle to test the clamping force and torque of the fasteners, which can effectively verify the static and post-stress clamping force and torque of the fasteners under actual stress conditions, thereby improving the fastener process control and design verification, improving the stability and safety of the vehicle, and has a simple structure and saves costs.

[0012] Further, the first test workpiece includes a steering knuckle, and the steering knuckle is fixed to the test bench;

[0013] The second test workpiece includes a swing arm, and the steering knuckle and the swing arm are used to assemble the fastener to be tested, wherein the material of the swing arm includes at least one of steel and aluminum alloy.

[0014] Furthermore, the swing arm includes a first connecting portion and a second connecting portion relative to each other, the first connecting portion is used to assemble the fastener to be tested, and the second connecting portion is used to connect to the force loading device, and the force loading device is used to load the load to the swing arm.

[0015] Furthermore, the load includes an axial load, the direction of the axial load is the axial direction of the swing arm, and the axis of the swing arm is the center line of the first connecting part and the second connecting part.

[0016] Furthermore, the force loading device includes a connecting member and a hydraulic loading device connected to the connecting member, the connecting member is used to connect the second test workpiece and the hydraulic loading device, and the hydraulic loading device is used to load the load onto the second test workpiece.

[0017] Further, the fastener to be tested is assembled to the test workpiece according to corresponding assembly process requirements, wherein the assembly process requirements include at least one of assembly method requirements, assembly torque and clamping length.

[0018] Furthermore, the load is determined by vehicle operating conditions, wherein the vehicle operating conditions include at least one of road conditions, vehicle speed, vehicle type, vehicle age, ambient temperature and ambient humidity.

[0019] Another aspect of the present application provides a vehicle testing method, wherein the vehicle comprises a first component, a second component and a fastener, wherein the fastener is used to connect the first component and the second component, and the vehicle testing method is used to test the stress condition of the fastener to be tested, and the vehicle testing method comprises:

[0020] Assembling the fastener to be tested between a first test workpiece and a second test workpiece, wherein the first test workpiece is arranged on a test bench, the first test workpiece is the same as the first component, the second test workpiece is the same as the second component, and the test bench is further provided with a force loading device;

[0021] The clamping force and torque of the fastener to be tested are detected when the fastener to be tested is not loaded and when the fastener to be tested is loaded, wherein the load is applied to the second test workpiece by the force loading device, the clamping force is detected by a force sensor connected to the fastener to be tested, and the torque is detected by a torque detection device.

[0022] Further, the detecting of the clamping force and torque of the fastener to be tested when the fastener to be tested is not loaded with a load and when the fastener to be tested is loaded with a load comprises:

[0023] When the fastener to be tested is not loaded with a load, detecting a static clamping force of the fastener to be tested, wherein the static clamping force is a clamping force of the fastener to be tested when no load is loaded;

[0024] After the fastener to be tested is left to stand for a preset standing time, detecting a standing clamping force of the fastener to be tested and a final torque corresponding to the standing clamping force;

[0025] connecting the force applying device to the second test workpiece;

[0026] A load is applied to the second test workpiece to detect the ultimate clamping force of the fastener to be tested and the residual torque corresponding to the ultimate clamping force.

[0027] Furthermore, after the fastener to be tested is left to stand for a preset standing time, before detecting the standing clamping force of the fastener to be tested and the final torque corresponding to the standing clamping force, the method further includes:

[0028] After the fastener to be tested is left to stand for a preset decay time, the decayed clamping force of the fastener to be tested is detected, wherein the preset decay time is less than the preset standing time.

[0029] Furthermore, after the step of applying a load to the second test workpiece and detecting the limit clamping force of the fastener to be tested and the residual torque corresponding to the limit clamping force, the method further comprises:

[0030] Determining a torque attenuation rate of the fastener to be tested according to the final torque and the residual torque;

[0031] The fasteners to be tested are screened according to the torque attenuation rate and the design requirements to obtain target fasteners that meet the design requirements.

[0032] Furthermore, before screening the fasteners to be tested according to the torque attenuation rate and the design requirements to obtain target fasteners that meet the design requirements, the method further includes:

[0033] Obtaining the vehicle operating condition and the type of the fastener to be tested;

[0034] The design requirements are determined according to the vehicle operating conditions and the type of the fastener to be tested.

[0035] Further, assembling the fastener to be tested between a first test workpiece and a second test workpiece comprises:

[0036] Obtaining the type of the fastener to be tested;

[0037] Determining corresponding assembly process requirements according to the type of the fastener to be tested, wherein the assembly process requirements include at least one of assembly method requirements, assembly torque, and clamping length;

[0038] According to the assembly process requirements, the fastener to be tested is assembled between the first test workpiece and the second test workpiece.

[0039] Furthermore, the step of assembling the fastener to be tested between the first test workpiece and the second test workpiece further comprises:

[0040] Connect the force sensor to the fastener to be tested.

[0041] Further, the first test workpiece includes a steering knuckle, the steering knuckle is fixed to the test bench, and the second test workpiece includes a swing arm, the swing arm includes a first connecting portion and a second connecting portion opposite to each other;

[0042] The step of assembling the fastener to be tested between the first test workpiece and the second test workpiece according to the assembly process requirements includes:

[0043] According to the assembly process requirements, the fastener to be tested is assembled between the steering knuckle and the first connecting portion of the swing arm.

[0044] Furthermore, the force loading device includes a connecting piece and a hydraulic loading device connected to the connecting piece;

[0045] The step of assembling the fastener to be tested between a first test workpiece and a second test workpiece comprises:

[0046] The connecting member is connected to the second test workpiece, so that the hydraulic loading device is connected to the second test workpiece.

[0047] Furthermore, before detecting the clamping force and torque of the fastener to be tested when the fastener to be tested is not loaded and when the fastener to be tested is loaded, the method further comprises:

[0048] Acquiring a vehicle operating condition, wherein the vehicle operating condition includes at least one of a road condition, a vehicle speed, a vehicle type, a vehicle age, an ambient temperature, and an ambient humidity;

[0049] The load is determined according to the vehicle operating condition. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0051] Figure 1 Shown is a structural schematic diagram of an embodiment of a vehicle testing system of the present application;

[0052] Figure 2 The figure is a flow chart of an embodiment of a vehicle testing method of the present application;

[0053] Figure 3 Shown Figure 2 The flowchart of step S100 of the vehicle testing method shown in FIG.

[0054] Figure 4 Shown Figure 2 FIG. 1 is a flow chart of step S200 of an embodiment of a vehicle testing method. DETAILED DESCRIPTION

[0055] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0056] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantitative limit, but indicate that there is at least one. "Multiple" or "several" means at least two. Unless otherwise specified, words such as "front", "rear", "lower" and / or "upper" are only for the convenience of explanation and are not limited to a position or a spatial orientation. Words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect.

[0057] The singular forms "a", "said" and "the" used in this specification and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0058] The vehicle testing system provided in the present application includes a test bench, a test workpiece, a force loading device, a force sensor and a torque detection device. The test workpiece includes a first test workpiece and a second test workpiece, the first test workpiece is arranged on the test bench, and the first test workpiece and the second test workpiece are used to assemble a fastener to be tested, wherein the first test workpiece is the same as the first component, and the second test workpiece is the same as the second component. The force loading device is arranged on the test bench, and is used to load the second test workpiece. The force sensor is connected to the fastener to be tested, and is used to detect the clamping force of the fastener to be tested when the fastener to be tested is not loaded with a load and when the fastener to be tested is loaded with a load. The torque detection device is used to detect the torque of the fastener to be tested when the fastener to be tested is not loaded with a load and when the fastener to be tested is loaded with a load.

[0059] The vehicle testing system provided in the present application uses the actual workpiece of the vehicle to test the clamping force and torque of the fasteners, which can effectively verify the static and post-stress clamping force and torque of the fasteners under actual stress conditions, thereby improving the fastener process control and design verification, improving the stability and safety of the vehicle, and has a simple structure and saves costs.

[0060] The vehicle testing method provided by the present application includes: assembling a fastener to be tested between a first test workpiece and a second test workpiece, wherein the first test workpiece is arranged on a test bench, the first test workpiece is the same as the first component, the second test workpiece is the same as the second component, and the test bench is also provided with a force loading device. When the fastener to be tested is not loaded with a load and is loaded with a load, the clamping force and torque of the fastener to be tested are detected, wherein the load is applied to the second test workpiece by the force loading device, the clamping force is detected by a force sensor connected to the fastener to be tested, and the torque is detected by a torque detection device.

[0061] The vehicle testing system and vehicle testing method of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments and implementations can be combined with each other.

[0062] Figure 1 The structure diagram of an embodiment of the vehicle testing system 10 of the present application is shown. The vehicle may include a sedan, an SUV, an off-road vehicle or other non-track-borne vehicle driven by power; the power source of the vehicle may be fuel or a power battery, which is not limited in the present application. Specifically, the vehicle includes a first component, a second component and a fastener, the fastener is used to connect the first component and the second component, and the vehicle testing system 10 is used to test the force condition of the fastener 500 to be tested. The vehicle testing system 10 includes a test bench 100, a test workpiece 200, a force loading device 300, a force sensor 400 and a torque detection device. The test workpiece 200 includes a first test workpiece 210 and a second test workpiece 220, the first test workpiece 210 is arranged on the test bench 100, and the first test workpiece 210 and the second test workpiece 220 are used to assemble the fastener 500 to be tested, wherein the first test workpiece 210 is the same as the first component, and the second test workpiece 220 is the same as the second component. The force loading device 300 is arranged on the test bench 100, and is used to load the test workpiece. The force sensor 400 is connected to the fastener 500 to be tested, and is used to detect the clamping force of the fastener 500 to be tested when the fastener 500 to be tested is not loaded and is loaded. The torque detection device is used to detect the torque of the fastener 500 to be tested when the fastener 500 to be tested is not loaded and is loaded.

[0063] The clamping force refers to the tensile force acting on the rod of the fastener during the tightening process, and the torque refers to the torque applied to the nut or bolt head when the fastener is tightened. The clamping force and torque can represent the tightening characteristics of the fastener. When the fastener is subjected to force, it may become loose or even cause vehicle parts to loosen. The vehicle testing system 10 provided in the present application uses the actual workpiece of the vehicle to test the clamping force and torque of the fastener, which can effectively check the clamping force and torque of the fastener in the static state and after being subjected to force under the actual force condition, thereby improving the fastener process control and design verification, improving the stability and safety of the vehicle, and has a simple structure and saves costs.

[0064] It should be noted that the fastener 500 to be tested represents the vehicle fastener object that currently needs to be tested, and the fastener 500 to be tested includes at least two different fasteners. The types of fasteners 500 to be tested may include bolts, pins, rivets and other fasteners that can be applied to vehicles. The above-mentioned different fasteners may represent different types of fasteners; they may also include fasteners of the same type but different structures, such as embossed bolts and flange bolts; they may also include bolts of the same type but different specific structural parameters, such as a first embossed bolt and a second embossed bolt with different clamping lengths or different pitches. The material of the fastener 500 to be tested may include metal or plastic, which is not limited in this application.

[0065] Optionally, the torque detection device may include a torque wrench, and may also include a torque sensor or other torque detection equipment. Among them, the torque wrench may include a torque gun. The torque sensor can be connected to the fastener 500 to be tested, so as to facilitate real-time detection of the torque of the fastener 500 to be tested. The force sensor 400 can be connected to the fastener 500 to be tested before the fastener 500 to be tested is not assembled to the first test workpiece 210 and the second test workpiece 220, so that the clamping force of the fastener 500 to be tested can be synchronously collected when the fastener 500 to be tested is assembled, which is convenient for subsequent data information processing and generates a real-time monitoring diagram of load loading. The torque detection device and the force sensor 400 can improve the accuracy of detection.

[0066] In some embodiments, the test bench 100 includes a fixing portion 110 and a workbench 120, the fixing portion 110 is fixed on the workbench 120, and the first test workpiece 210 is fixedly connected to the workbench 120 through the fixing portion 110. The fixed connection method may include bolt connection; it may also include other connection methods such as welding and riveting to improve the stability of the connection between the first test workpiece 210 and the test bench 100, and prevent the first test workpiece 210 from falling off due to force during the test process.

[0067] In some embodiments, the force loading device 300 includes a connecting member 310 and a hydraulic loading device 320 connected to the connecting member 310. The connecting member 310 is used to connect the second test workpiece 220 and the hydraulic loading device 320. The hydraulic loading device 320 is used to load the second test workpiece 220. Figure 1 As shown, optionally, the connecting member 310 may include a yoke, and the second test workpiece 220 may be connected by a bolt and the yoke. The hydraulic loading device 320 may ensure the stability of the load loading.

[0068] It can be understood that the first component and the second component are both vehicle parts, including but not limited to steering knuckles and swing arms, vehicle bodies and dashboards, wheel bearings and wheels, and other parts that require fasteners to connect. Accordingly, in some embodiments, the first test workpiece 210 includes a steering knuckle, which is fixed to the test bench 100; the second test workpiece 220 includes a swing arm, and the steering knuckle and the swing arm are used to assemble the fastener 500 to be tested. In some other embodiments, the first test workpiece 210 includes a vehicle body, and the second test workpiece 220 includes a dashboard; the first test workpiece 210 includes a wheel bearing, and the second test workpiece 220 includes a wheel. Based on the embodiment in which the first test workpiece 210 includes a steering knuckle and the second test workpiece 220 includes a swing arm, the material of the swing arm may include at least one of steel and aluminum alloy, and the tester may effectively calibrate the clamping force and torque of the fastener under the test conditions of the steel swing arm and the aluminum alloy swing arm, respectively. Figure 1 As shown, in some embodiments, the swing arm includes a first connecting portion 221 and a second connecting portion 222 relative to each other, the first connecting portion 221 is used to assemble the fastener 500 to be tested, and the second connecting portion 222 is used to connect to the force loading device 300, and the force loading device 300 is used to load the swing arm.

[0069] In some embodiments, the fastener 500 to be tested is assembled on the test workpiece according to the corresponding assembly process requirements, wherein the assembly process requirements include at least one of assembly method requirements, assembly torque, and clamping length. The assembly process requirements of fasteners of different types and structures are different, and the assembly process requirements can be determined according to existing standards or specifications, and this application does not limit them.

[0070] In some embodiments, the load is determined by the vehicle operating conditions. Among them, the vehicle operating conditions include at least one of the road conditions, vehicle speed, vehicle type, vehicle age, ambient temperature and ambient humidity. It should be noted that the road conditions include the flatness of the road surface, the degree of road wear and other road condition parameters. It can be understood that the lower the road surface flatness, the higher the degree of road wear, and the worse the road surface conditions, the greater the damage caused by the road surface to the vehicle parts being driven, such as the suspension system and wheels. The faster the vehicle speed and the older the vehicle, the greater the damage to the vehicle parts during the driving process. Different types of vehicles have different forces and torques that their fasteners can and need to withstand. Extreme ambient temperature and ambient humidity, such as hot weather and heavy rain, have an impact on the tightness of fasteners.

[0071] On the basis of the above-mentioned embodiments, the vehicle operating conditions include vehicle driving conditions and vehicle extreme conditions. The vehicle driving conditions refer to the driving state of the vehicle under normal circumstances, such as the road surface flatness and wear degree are normal, and the vehicle driving speed is within the speed range of traffic regulations. The vehicle extreme conditions refer to the vehicle state under extreme conditions, such as poor road surface flatness and high vehicle driving speed. At this time, the fasteners of the vehicle will be subjected to a large external force, which may cause loosening, shaking, and even loosening of parts. The vehicle testing system 10 of the embodiment of the present application can effectively verify and check the reasonable design and process control of fasteners by considering the vehicle operating conditions under a combination of multiple factors, especially the vehicle extreme conditions. The vehicle testing system 10 of the embodiment of the present application determines the load including the load size and the force direction of the load through the vehicle operating conditions. The load may include an axial load. In some embodiments, the direction of the axial load is the axial direction of the swing arm, and the axis of the swing arm is the center line of the first connecting part 221 and the second connecting part 222, so as to detect the axial clamping force of the fastener 500 to be tested. Figure 1 As shown, Figure 1 The "F" in the formula represents the axial load. Figure 1 The arrow in the figure indicates the direction of action of the axial load F.

[0072] Figure 2 The vehicle testing method of one embodiment of the present application is shown as a flow chart. The vehicle testing method of one embodiment of the present application includes steps S100 to S200:

[0073] In step S100, the fastener to be tested is assembled between a first test workpiece and a second test workpiece, wherein the first test workpiece is arranged on a test bench, the first test workpiece is identical to the first component, the second test workpiece is identical to the second component, and the test bench is further provided with a force loading device.

[0074] In step S200, the clamping force and torque of the fastener to be tested are detected when the fastener to be tested is not loaded and when it is loaded, wherein the load is applied to the second test workpiece by a force loading device, the clamping force is detected by a force sensor connected to the fastener to be tested, and the torque is detected by a torque detection device.

[0075] Figure 3 Shown Figure 2 The flowchart of step S100 of the vehicle testing method is shown in FIG. In some embodiments, step S100 of the vehicle testing method of the present application may include steps S110 to S130:

[0076] In step S110 , the type of the fastener to be tested is obtained.

[0077] In step S120, the corresponding assembly process requirements are determined according to the type of the fastener to be tested, wherein the assembly process requirements include at least one of assembly method requirements, assembly torque, and clamping length.

[0078] In step S130 , the fastener to be tested is assembled between the first test workpiece and the second test workpiece according to the assembly process requirements.

[0079] The assembly process requires specialized equipment operated by professional testers to tighten the fasteners to be tested.

[0080] In some embodiments, step S100 of the vehicle testing method of the present application may further include step S140:

[0081] In step S140 , the force sensor is connected to the fastener to be tested.

[0082] It should be noted that step S140 can be performed before any of step S110, step S120 and step S130, and the force sensor can be connected to the fastener to be tested before the fastener to be tested is assembled on the first test workpiece and the second test workpiece. If the force sensor is connected to the fastener to be tested after the fastener to be tested is assembled on the first test workpiece and the second test workpiece, the clamping force will decay over time, and the clamping force of the fastener to be tested when tightened cannot be collected synchronously.

[0083] In some embodiments, the first test workpiece includes a steering knuckle, which is fixed to the test bench, and the second test workpiece includes a swing arm, which includes a first connecting portion and a second connecting portion opposite to each other. Step S130 of the vehicle testing method of the present application may include step S131:

[0084] In step S131 , according to the assembly process requirements, the fastener to be tested is assembled between the steering knuckle and the first connecting portion of the swing arm.

[0085] Figure 4 Shown Figure 2 FIG. 1 is a flow chart of an embodiment of a vehicle testing method step S200. Figure 4 As shown, in some embodiments, step S200 of the vehicle testing method of the present application may include steps S210 to S240:

[0086] In step S210 , when the fastener to be tested is not loaded with a load, the static clamping force of the fastener to be tested is detected, wherein the static clamping force is the clamping force of the fastener to be tested when no load is loaded.

[0087] In step S220 , after the fastener to be tested is left to stand for a preset standing time, the standing clamping force of the fastener to be tested and the final torque corresponding to the standing clamping force are detected.

[0088] In step S230 , the force applying device and the second test workpiece are connected.

[0089] In step S240, a load is applied to the second test workpiece to detect the ultimate clamping force of the fastener to be tested and the residual torque corresponding to the ultimate clamping force.

[0090] During the test, when the clamping force reaches the maximum, the limit clamping force can be collected. When the limit clamping force is reached, the residual torque can be collected. After collecting the static clamping force of the fastener to be tested, the force loading device is connected to the second test workpiece, so that the accuracy of the static clamping force detection can be guaranteed.

[0091] In this embodiment, the rest time may include 12 hours. A longer rest time can more accurately reflect the clamping force and final torque of the fastener after rest attenuation.

[0092] In some embodiments, after step S240 of the vehicle testing method of the present application, steps S250 to S260 may also be included:

[0093] In step S250 , the torque decay rate of the fastener to be tested is determined according to the final torque and the residual torque.

[0094] In step S260, the fasteners to be tested are screened according to the torque attenuation rate and the design requirements to obtain target fasteners that meet the design requirements.

[0095] The tester can compare the calculated torque decay rate with the design requirements under the vehicle working condition and select the fastener to be tested. The design requirements can include a requirement range. If the torque decay rate is within the requirement range, it is determined that the fastener to be tested meets the design requirements.

[0096] In some embodiments, before step S220 of the vehicle testing method of the present application, step S270 may also be included:

[0097] In step S270, after the fastener to be tested is left to stand for a preset decay time, the decayed clamping force of the fastener to be tested is detected, wherein the preset decay time is less than the preset standing time.

[0098] In this embodiment, the preset decay time is 3 minutes. The decay clamping force can determine the decay of the fastening degree of the fastener within a short time after being tightened.

[0099] In some embodiments, before step S260 of the vehicle testing method of the present application, steps S280 to S290 may also be included:

[0100] In step S280, the vehicle operating condition and the type of the fastener to be tested are obtained.

[0101] In step S290 , the design requirements are determined according to the vehicle operating conditions and the type of the fastener to be tested.

[0102] Vehicle operating conditions may include vehicle driving conditions and vehicle extreme operating conditions, which will not be elaborated here.

[0103] In some embodiments, the force loading device includes a connecting member and a hydraulic loading device connected to the connecting member. Step S100 of the vehicle testing method of the present application may also include step S150:

[0104] In step S150 , the connecting member is connected to the second test workpiece, so that the hydraulic loading device is connected to the second test workpiece.

[0105] In some embodiments, the vehicle testing method of the present application may further include steps S300 to S400 before step S200:

[0106] In step S300, the vehicle operating condition is obtained, wherein the vehicle operating condition includes at least one of road condition, vehicle speed, vehicle type, vehicle age, ambient temperature and ambient humidity;

[0107] In step S400, the load is determined according to the vehicle operating condition.

[0108] The load parameters determined according to the vehicle operating conditions include the load magnitude and the force direction of the load. In some embodiments, the load includes an axial load, such as Figure 1 shown.

[0109] The following table shows the test results of the clamping force test of different fasteners to be tested using the vehicle testing system and vehicle testing method according to an embodiment of the present application:

[0110]

[0111] It should be noted that the first embossed bolt and the second embossed bolt have the same bolt type, but different specific structural parameters. The corresponding assembly process requires an assembly torque of 90Nm and a rotation angle of 120°. The test condition with a load of 20kN represents the general vehicle driving condition; the test condition with a load of 30kN represents the extreme vehicle condition. By simulating the extreme vehicle conditions, design problems caused by imperfect design verification can be avoided to a certain extent.

[0112] The following table shows the test results of torque testing of different fasteners to be tested using the vehicle testing system and vehicle testing method of an embodiment of the present application, and the torque attenuation rate is calculated based on the final torque and the residual torque:

[0113]

[0114] According to the test results and calculated torque attenuation rates in the above table, bolts of the same type and structure have different corresponding torque attenuation rates when the swing arm types are different. Therefore, designers and testers can comprehensively judge whether the clamping force and torque attenuation rate of different fasteners meet the design requirements during the production and assembly of parts based on the attenuation of different fasteners.

[0115] As for the method embodiment, since it basically corresponds to the device embodiment, the relevant parts can be referred to the partial description of the device embodiment. The method embodiment and the device embodiment complement each other.

[0116] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A vehicle testing system, characterized in that: The vehicle comprises a first component, a second component and a fastener, wherein the fastener is used to connect the first component and the second component, and the vehicle testing system is used to test the stress condition of the fastener to be tested, and the vehicle testing system comprises: Test bench; A test workpiece, comprising a first test workpiece and a second test workpiece, wherein the first test workpiece is disposed on the test bench, and the first test workpiece and the second test workpiece are used to assemble the fastener to be tested, wherein the first test workpiece is the same as the first component, and the second test workpiece is the same as the second component; a force loading device, provided on the test bench, for loading the second test workpiece; A force sensor connected to the fastener to be tested, and used for detecting the clamping force of the fastener to be tested when the fastener to be tested is not loaded with a load and when the fastener to be tested is loaded with a load; The torque detection device is used to detect the torque of the fastener to be tested when the fastener to be tested is not loaded and when the fastener to be tested is loaded.

2. The vehicle testing system according to claim 1, characterized in that: The first test workpiece includes a steering knuckle, and the steering knuckle is fixed to the test bench; The second test workpiece includes a swing arm, and the steering knuckle and the swing arm are used to assemble the fastener to be tested, wherein the material of the swing arm includes at least one of steel and aluminum alloy.

3. The vehicle testing system according to claim 2, characterized in that: The swing arm includes a first connecting portion and a second connecting portion opposite to each other, wherein the first connecting portion is used to assemble the fastener to be tested, and the second connecting portion is used to connect to the force loading device, and the force loading device is used to load the load to the swing arm.

4. The vehicle testing system according to claim 3, characterized in that: The load includes an axial load, the direction of the axial load is the axial direction of the swing arm, and the axis of the swing arm is the center line of the first connecting part and the second connecting part.

5. The vehicle testing system according to claim 1, characterized in that: The force loading device includes a connecting member and a hydraulic loading device connected to the connecting member, the connecting member is used to connect the second test workpiece and the hydraulic loading device, and the hydraulic loading device is used to load the load onto the second test workpiece.

6. The vehicle testing system according to claim 1, characterized in that: The fastener to be tested is assembled on the test workpiece according to corresponding assembly process requirements, wherein the assembly process requirements include at least one of assembly method requirements, assembly torque and clamping length.

7. The vehicle testing system according to claim 1, characterized in that: The load is determined by vehicle operating conditions, wherein the vehicle operating conditions include at least one of road conditions, vehicle speed, vehicle type, vehicle age, ambient temperature and ambient humidity.

8. A vehicle testing method, characterized in that: The vehicle comprises a first component, a second component and a fastener, wherein the fastener is used to connect the first component and the second component, and the vehicle testing method is used to test the stress condition of the fastener to be tested, and the vehicle testing method comprises: Assemble the fastener to be tested on between a first test workpiece and a second test workpiece, wherein the first test workpiece is arranged on a test bench, the first test workpiece is the same as the first component, the second test workpiece is the same as the second component, and the test bench is further provided with a force loading device; The clamping force and torque of the fastener to be tested are detected when the fastener to be tested is not loaded and when the fastener to be tested is loaded, wherein the load is applied to the second test workpiece by the force loading device, the clamping force is detected by a force sensor connected to the fastener to be tested, and the torque is detected by a torque detection device.

9. The vehicle testing method according to claim 8, characterized in that: The method of detecting the clamping force and torque of the fastener to be tested when the fastener to be tested is not loaded with a load and when the fastener to be tested is loaded with a load comprises: When the fastener to be tested is not loaded with a load, detecting a static clamping force of the fastener to be tested, wherein the static clamping force is a clamping force of the fastener to be tested when no load is loaded; After the fastener to be tested is left to stand for a preset standing time, detecting a standing clamping force of the fastener to be tested and a final torque corresponding to the standing clamping force; connecting the force applying device to the second test workpiece; A load is applied to the second test workpiece to detect the ultimate clamping force of the fastener to be tested and the residual torque corresponding to the ultimate clamping force.

10. The vehicle testing method according to claim 9, characterized in that: After the fastener to be tested is left to stand for a preset standing time, before detecting the standing clamping force of the fastener to be tested and the final torque corresponding to the standing clamping force, the method further includes: After the fastener to be tested is left to stand for a preset decay time, the decayed clamping force of the fastener to be tested is detected, wherein the preset decay time is less than the preset standing time.

11. The vehicle testing method according to claim 9, characterized in that: After the load is applied to the second test workpiece and the limit clamping force of the fastener to be tested and the residual torque corresponding to the limit clamping force are detected, the method further includes: Determining a torque attenuation rate of the fastener to be tested according to the final torque and the residual torque; The fasteners to be tested are screened according to the torque attenuation rate and the design requirements to obtain target fasteners that meet the design requirements.

12. The vehicle testing method according to claim 11, characterized in that: Before screening the fasteners to be tested according to the torque attenuation rate and the design requirements to obtain target fasteners that meet the design requirements, the method further includes: Obtaining the vehicle operating condition and the type of the fastener to be tested; The design requirements are determined according to the vehicle operating conditions and the type of the fastener to be tested.

13. The vehicle testing method according to claim 8, characterized in that: The step of assembling the fastener to be tested between a first test workpiece and a second test workpiece comprises: Obtaining the type of the fastener to be tested; Determining corresponding assembly process requirements according to the type of the fastener to be tested, wherein the assembly process requirements include at least one of assembly method requirements, assembly torque, and clamping length; According to the assembly process requirements, the fastener to be tested is assembled between the first test workpiece and the second test workpiece.

14. The vehicle testing method according to claim 13, characterized in that: The step of assembling the fastener to be tested between the first test workpiece and the second test workpiece further comprises: Connect the force sensor to the fastener to be tested.

15. The vehicle testing method according to claim 13, characterized in that: The first test workpiece includes a steering knuckle, the steering knuckle is fixed to the test bench, and the second test workpiece includes a swing arm, the swing arm includes a first connecting portion and a second connecting portion opposite to each other; The step of assembling the fastener to be tested between the first test workpiece and the second test workpiece according to the assembly process requirements includes: According to the assembly process requirements, the fastener to be tested is assembled between the steering knuckle and the first connecting portion of the swing arm.

16. The vehicle testing method according to claim 8, characterized in that: The force loading device includes a connecting piece and a hydraulic loading device connected to the connecting piece; The step of assembling the fastener to be tested between a first test workpiece and a second test workpiece comprises: The connecting member is connected to the second test workpiece, so that the hydraulic loading device is connected to the second test workpiece.

17. The vehicle testing method according to claim 8, characterized in that: Before detecting the clamping force and torque of the fastener to be tested when the fastener to be tested is not loaded and is loaded, the method further includes: Acquiring a vehicle operating condition, wherein the vehicle operating condition includes at least one of a road condition, a vehicle speed, a vehicle type, a vehicle age, an ambient temperature, and an ambient humidity; The load is determined according to the vehicle operating condition.

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