Front axle lateral testing device, method and system

Abstract

The invention relates to the field of vehicle testing, and provides a front axle lateral testing device, method and system.The front axle lateral testing device comprises a loading input system and a steering angle swing system; the loading input system is configured to provide lateral loading for a test sample piece and drive the steering angle swing system to drive a front shaft of the test sample piece to swing according to a preset angle; and the steering angle swinging system is configured to support the test sample piece and enable the test sample piece to drive a front shaft of the test sample piece to swing according to a preset angle under the action of the loading input system. According to the invention, the lateral fatigue condition of the actual front axle steering angle can be simulated, the test accuracy is high, the test space has high flexibility and universality, and the device can be applied to different test samples.

Description

Technical Field

[0001] The present application relates to the field of vehicle testing, and in particular to a front axle lateral testing device, method and system. Background Art

[0002] As a key component of the vehicle's load-bearing system, the front axle not only bears the crucial role of supporting the vehicle's weight and ensuring driving stability, but its assembly, including steering components like the steering knuckle and tie rods, also directly executes the vehicle's steering operation. During vehicle operation, the lateral force exerted on the front axle is closely related to the steering conditions. When the vehicle turns, centrifugal force acts on the front axle, and the magnitude and direction of this lateral force dynamically change with changes in steering angle and vehicle speed.

[0003] However, current corporate and industry standards for front axle lateral fatigue testing are based on straight-line vehicle driving conditions, simulating only a single, static force environment. This differs significantly from actual driving scenarios, where the vehicle frequently turns and the front axle is subjected to complex dynamic lateral forces. Consequently, existing test results fail to truly reflect the fatigue characteristics of the front axle in actual use and cannot provide a reliable basis for product design optimization.

[0004] Currently, domestic commercial vehicle manufacturers face numerous challenges in this field. A lack of specialized testing equipment hinders the simulation of front axle lateral fatigue conditions at varying steering angles. A lack of established scientific and standardized testing methods results in a lack of standardized testing procedures. Furthermore, a long-standing lack of relevant test data makes it difficult to systematically analyze and evaluate front axle performance. These challenges severely hinder the development and quality improvement of commercial vehicle front axle products in my country. Summary of the Invention

[0005] The purpose of this application is to provide a front axle lateral testing device, method and system that can simulate the lateral fatigue of the actual front axle steering angle and has high test accuracy. The specific scheme is as follows:

[0006] A front axle lateral test device comprises: a loading input system and a steering angle swing system;

[0007] The load input system is configured to provide a lateral load to the test sample and drive the steering angle swing system to swing the front axle of the test sample according to a preset angle;

[0008] The steering angle swing system is configured to support the test sample and enable the test sample to swing its front axle according to a preset angle under the action of the loading input system.

[0009] Preferably, the loading input system comprises: at least two power drive devices;

[0010] A power drive device for applying a lateral force to a lateral force receiving point of the test specimen, wherein the lateral force receiving point is a contact point between the fixed structure of the test specimen and the ground;

[0011] The other power driving device is used to provide longitudinal driving force to the steering angle swing system to drive the steering angle swing system to drive the front axle of the test sample to swing back and forth at a preset angle relative to the fixed structure.

[0012] Preferably, the steering angle swing system includes:

[0013] Front axle bracket assembly and sample restraint assembly;

[0014] The front axle support assembly is configured to support and position the front axle and drive the front axle to swing relative to the sample restraint assembly or the fixed structure of the test sample;

[0015] The sample constraint assembly is rotatably connected to the front axle support assembly; the sample constraint assembly is used to constrain the swing angle of the front axle.

[0016] Preferably, the front axle support assembly includes:

[0017] A front axle bracket and a U-shaped bracket; wherein the top of the front axle bracket can be connected to the front axle; one side of the front axle bracket is detachably connected to the U-shaped bracket, and is rotatably connected to the sample restraint assembly through the U-shaped bracket;

[0018] The front axle bracket includes: a right leaf spring seat lower plate bracket, an upper bearing column, a lower bearing column, a bearing trapezoidal plate bracket and a left leaf spring seat lower plate bracket; wherein, the middle portion of the right leaf spring seat lower plate bracket is connected and fixed to the upper portion of the bearing trapezoidal plate bracket via the upper bearing column, and the bottom portion of the right leaf spring seat lower plate bracket is connected and fixed to the bottom portion of the bearing trapezoidal plate bracket via the lower bearing column; one side of the bearing trapezoidal plate bracket is fixedly connected to the left leaf spring seat lower plate bracket;

[0019] Also included are a first lock plate and a second lock plate;

[0020] The first locking plate is detachably connected to the top of the left leaf spring seat lower plate bracket;

[0021] The second locking plate is detachably connected to the top of the lower plate bracket of the right leaf spring seat;

[0022] The left leaf spring seat lower plate bracket cooperates with the first lock plate to lock and fix one end of the front axle, and correspondingly, the right leaf spring seat lower plate bracket cooperates with the second lock plate to lock and fix the other end of the front axle;

[0023] The load-bearing trapezoidal plate bracket is rotatably connected to the sample restraint assembly via a U-shaped support arm provided on one side;

[0024] The bottom of the opening of the U-shaped support arm is provided with a swing shaft; one side of the swing shaft can be driven and connected to a power drive device.

[0025] Preferably, the sample restraint assembly comprises:

[0026] A first supporting structure and a second supporting structure; wherein, the centers of the first supporting structure and the second supporting structure coincide; and the first supporting structure is rotatably connected to the lower arm of the U-shaped support arm, and the second supporting structure is rotatably connected to the lower arm of the U-shaped support arm; the front end portion of the upper arm and the front end portion of the lower arm of the U-shaped support arm are arranged to be inclined upward.

[0027] Preferably, the first supporting structure comprises:

[0028] A main support shaft, the main support shaft passing through the lower support arm of the U-shaped bracket and being rotatably connected to the lower support arm through a bearing assembly;

[0029] A main base plate, wherein a fixing groove matching the bottom of the main support shaft is provided in the middle of the main base plate, and the main base plate is connected to the main support shaft through the fixing groove in the middle;

[0030] A fixing groove, wherein an annular flange is provided inwardly on the upper edge of the opening of the fixing groove, and the fixing groove is fixedly connected to the main support shaft through the annular flange;

[0031] The central axis of the fixing groove coincides with the axis of the main support shaft; wherein the inner wall of the fixing groove is arranged obliquely, and the longitudinal edge line of the inner wall is parallel to the axis of the main support shaft.

[0032] Preferably, the second supporting structure comprises: a ball stud, a supporting beam, and a supporting assembly;

[0033] The bottom of the ball stud is rotatably connected to the ball bearing on the lower arm of the U-shaped support arm; the middle portion of the support beam is sleeved on the ball stud and threadedly connected to the ball stud; both ends of the support beam are fixedly connected to the support assembly; and the longitudinal centerline of the support beam coincides with the axis of the ball stud;

[0034] The support assembly includes: beam brackets symmetrically arranged at both ends of the supporting beam; each beam bracket is welded and fixed to the corresponding end of the supporting beam; and each beam bracket is fixedly connected to the large bracket on the side away from the supporting beam.

[0035] A test sample, comprising the front axle lateral test device;

[0036] The test sample also includes: a front axle and a fixing structure;

[0037] One end of the front axle is rotatably connected to the fixed structure;

[0038] The fixing structure includes:

[0039] A left steering knuckle and a right steering knuckle; wherein the left steering knuckle and the right steering knuckle are respectively rotatably connected to the two ends of the front axle; the left steering knuckle or the right steering knuckle is fixedly connected to the steering longitudinal tie rod at the corresponding end through the steering knuckle arm on the corresponding side; a wheel hub is fixedly provided on the outer side of the left steering knuckle or the right steering knuckle; a side load arm is detachably connected to the outer side of each wheel hub;

[0040] A front axle, wherein both the left and right sides of the front axle are rotatably connected to the kingpin on the left steering knuckle or the right steering knuckle through a steering tie rod;

[0041] The axis of the kingpin coincides with the axis of the ball stud and the axis of the main support shaft respectively.

[0042] A front axle lateral testing method is applied to the front axle lateral testing device; the method comprises the following steps:

[0043] Step S1: constructing a steering angle and lateral force load database based on pre-collected steering angle and lateral force load data;

[0044] Step S2: Analyze and process the steering angle and lateral force load database to obtain target data of the steering angle and lateral force load;

[0045] Step S3: Based on the target data of the steering angle and the lateral force load, a preset test method is used to obtain lateral force data corresponding to the steering angle in a steady state; the lateral force data includes: a maximum lateral force and a minimum lateral force corresponding to the steering angle;

[0046] Step S4: Based on the lateral force data, detecting the response data of the test sample; the response data at least includes: stress distribution, strain, displacement change and fatigue damage state.

[0047] A front axle lateral testing system, comprising:

[0048] a data construction module configured to construct a steering angle and lateral force load database based on pre-collected steering angle and lateral force load data;

[0049] a first processing module configured to analyze and process the steering angle and lateral force load database to obtain target data of the steering angle and lateral force load;

[0050] a second processing module configured to obtain lateral force data corresponding to the steering angle in a steady state using a preset testing method based on the target data of the steering angle and the lateral force load; the lateral force data including: a maximum lateral force and a minimum lateral force corresponding to the steering angle;

[0051] The test module is configured to detect response data of the test sample based on the lateral force data; the response data at least includes: stress distribution, strain, displacement change and fatigue damage state.

[0052] Compared with the prior art, the present invention has the following beneficial effects:

[0053] The present invention provides a front axle lateral testing device, method and system, which can accurately simulate the forces on the front axle under actual working conditions, so that the test results can better reflect the performance of the front axle in actual use; during the test, the steering angle swing system is adopted to drive the front axle to swing relative to the fixed structure, such as the steering knuckle does not swing, and the overall loading movement of the front axle steering angle is simulated by the swing of the front axle, and it is easy to assemble and disassemble. During the test, a single-sided method is used for measurement, and then after disassembly, the other side of the front axle is used for testing. The test space has greater flexibility and universality, and can be applied to different test samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 This is a schematic diagram of the overall structure of the test sample installed in the front axle lateral test device;

[0055] Figure 2 is a side structural schematic diagram of the second supporting structure;

[0056] Figure 3 is a top view of the second supporting structure;

[0057] Figure 4 is a front schematic diagram of the second supporting structure;

[0058] Figure 5 It is a structural diagram of the U-shaped support arm;

[0059] Figure 6 for Figure 5 AA cross-section of

[0060] Figure 7 Flowchart of the front axle lateral test method.

[0061] In the picture:

[0062] 1. Steering angle swing system;

[0063] 11. Front axle bracket assembly;

[0064] 110, front axle bracket; 1100, right leaf spring seat lower plate bracket; 1101, upper bearing column; 1102, lower bearing column; 1103, load-bearing trapezoidal plate bracket; 1104, left leaf spring seat lower plate bracket; 1105, first lock plate; 1106, second lock plate;

[0065] 111. U-shaped supporting arm; 112. swing axis;

[0066] 12. Sample restraint assembly;

[0067] 121, first supporting structure; 1210, main supporting shaft; 1211, main bottom plate; 1212, fixing groove;

[0068] 122. Second supporting structure; 1220. Ball stud; 1221. Support beam; 1222. Beam bracket; 1223. Large bracket; 1224. Reinforcement plate;

[0069] 2. Measure the sample;

[0070] 21. Front axle;

[0071] 22. Fixed structure; 220. Left steering knuckle; 221. Right steering knuckle; 222. Steering knuckle arm; 223. Steering longitudinal tie rod; 224. Wheel hub; 225. Side load arm; 226. Steering transverse tie rod;

[0072] 23. Kingpin. DETAILED DESCRIPTION

[0073] In order to make the purpose, technical solutions and advantages of this application clearer, the following Figure 1-7 This application is further described in detail. Obviously, the embodiments described are only a part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0074] The terms used in the examples of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms "a," "the," and "the" used in the examples of this application and the appended claims are also intended to include plural forms, and unless the context clearly indicates otherwise, "a plurality" generally includes at least two.

[0075] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0076] It should be understood that although the terms first, second, third, etc. may be used to describe in the embodiments of the present application, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, without departing from the scope of the embodiments of the present application, the first may also be referred to as the second, and similarly, the second may also be referred to as the first.

[0077] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to the determination" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)," depending on the context.

[0078] It should also be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product or device comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such product or device. In the absence of further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the product or device comprising the element.

[0079] It should be noted in particular that any symbols and / or numbers in the specification that are not marked in the accompanying drawings are not drawing marks.

[0080] To facilitate understanding of the embodiments provided in this application, the application scenarios of this application are explained as follows:

[0081] First, the current corporate and industry standards both test the lateral fatigue of the front axle under straight-line driving conditions, simulating only the lateral force on the front axle when the vehicle is driving in a straight line. Straight-line driving conditions are relatively simple, and the changes in the lateral force on the vehicle's front axle are relatively limited. The front axle lateral fatigue test, which does not take into account the front axle steering angle, is significantly different from the actual working conditions. In actual driving, the vehicle often needs to turn, and at this time the front axle will be subject to more complex and variable lateral forces due to the steering angle. For example, when the vehicle turns, the centrifugal force will cause the front axle to bear a large lateral load, and the magnitude and direction of the lateral force will change with different steering angles. Currently, existing commercial vehicle companies in China do not have the professional testing equipment to conduct lateral fatigue tests that take the front axle steering angle into consideration.

[0082] Based on the above analysis, it can be seen that there is an urgent need for a professional front axle lateral test device that can highly simulate the lateral fatigue of the actual front axle steering angle and at the same time have high test accuracy.

[0083] like Figure 1 As shown, a front axle lateral test device includes: a loading input system and a steering angle swing system 1;

[0084] The loading input system is configured to provide lateral loading to the test specimen and drive the steering angle swing system 1 to swing the front axle of the test specimen according to a preset angle;

[0085] The steering angle swing system 1 is configured to support the test sample and enable the test sample to swing its front axle according to a preset angle under the action of a loading input system.

[0086] It can be understood that the present application adopts a loading input system, which can accurately output lateral loads and drive the steering angle swing system 1 to drive the front axle to swing according to a preset angle, thereby providing strong protection for subsequent lateral fatigue testing of the front axle.

[0087] Furthermore, the loading input system includes: at least two power drive devices;

[0088] A power drive device for applying a lateral force to a lateral force receiving point of the test specimen, wherein the lateral force receiving point is a contact point between the fixed structure 22 of the test specimen and the ground;

[0089] The other power driving device is used to provide longitudinal driving force to the steering angle swing system 1, so as to drive the steering angle swing system 1 to drive the front axle of the test sample to swing back and forth at a preset angle relative to the fixed structure 22.

[0090] The power drive devices in this application can be electronically controlled actuators, used to provide driving force. In actual applications, one of the power drive devices is used to provide a longitudinal thrust Fx to the steering angle oscillation system 1, thereby driving the front axle to oscillate relative to the fixed structure 22. During on-site installation and testing, a running test bench can be pre-installed based on the preset angular swing value of the front axle to drive the electronically controlled actuator along the movement path of the front axle. The specific arrangement will be based on actual on-site operating conditions and will not be detailed here.

[0091] The output force of an electronically controlled actuator can be remotely controlled via a terminal. These actuators offer advantages such as high control accuracy, fast response, remote control, and automated integration. These advantages better meet the requirements for precise control of driving force during testing. For example, the actuator's stroke, speed, and output force can be precisely controlled to achieve precise adjustment of the front axle's swing angle and lateral force, more accurately simulating actual operating conditions.

[0092] Furthermore, the steering angle swing system 1 includes:

[0093] Front axle bracket assembly 11 and sample restraint assembly 12;

[0094] The front axle support assembly 11 is configured to support and position the front axle and drive the front axle to swing relative to the sample restraint assembly 12 or the fixed structure 22 of the test sample;

[0095] The sample constraint assembly 12 is rotatably connected to the front axle support assembly 11; the sample constraint assembly 12 is used to constrain the swing angle of the front axle.

[0096] In this embodiment, conventional design thinking is broken through. The front axle is supported and positioned by using the front axle bracket assembly 11, and the front axle is driven by the front axle bracket assembly 11 to swing at a preset angle with the sample constraint assembly 12 or the fixed structure 22 of the test sample as the rotating body to simulate the lateral fatigue and response of the front axle steering angle, thereby obtaining the lateral performance of the front axle or the overall lateral performance of the test sample.

[0097] It can be understood that in the test application of this application, the front axle is a swinging part, and the fixed structure 22 of the test sample is a fixed part and does not swing, such as the left steering knuckle 220, the right steering knuckle 221 and the steering knuckle arm 222.

[0098] Furthermore, the front axle support assembly 11 includes:

[0099] A front axle bracket 110 and a U-shaped bracket 111; wherein the top of the front axle bracket 110 can be connected to the front axle; one side of the front axle bracket 110 is detachably connected to the U-shaped bracket 111, and is rotatably connected to the sample restraint assembly 12 through the U-shaped bracket 111;

[0100] The front axle bracket 110 includes: a right leaf spring seat lower plate bracket 1100, an upper bearing column 1101, a lower bearing column 1102, a bearing trapezoidal plate bracket 1103, and a left leaf spring seat lower plate bracket 1104. The middle portion of the right leaf spring seat lower plate bracket 1100 is connected and fixed to the upper portion of the bearing trapezoidal plate bracket 1103 via the upper bearing column 1101, and the bottom portion of the right leaf spring seat lower plate bracket 1100 is connected and fixed to the bottom portion of the bearing trapezoidal plate bracket 1103 via the lower bearing column 1102. The outer portion of the bearing trapezoidal plate bracket 1103 is fixedly connected to the left leaf spring seat lower plate bracket 1104.

[0101] Also includes a first locking plate 1105 and a second locking plate 1106;

[0102] The first locking plate 1105 is detachably connected to the top of the left leaf spring seat lower plate bracket 1104;

[0103] The second locking plate 1106 is detachably connected to the top of the right leaf spring seat lower plate bracket 1100;

[0104] The left leaf spring seat lower plate bracket 1104 cooperates with the first locking plate 1105 to lock and fix one end of the front axle. Correspondingly, the right leaf spring seat lower plate bracket 1100 cooperates with the second locking plate 1106 to lock and fix the other end of the front axle.

[0105] The said supporting trapezoidal plate support 1103 is rotatably connected to the sample restraint assembly 12 via a U-shaped supporting arm 111 provided on one side;

[0106] A swing shaft 112 is provided at the bottom of the opening of the U-shaped support arm 111; one side of the swing shaft 112 can be driven and connected to a power drive device; wherein, the action point P2 of the swing shaft 112 and the power drive device is shown in the figure.

[0107] The front axle bracket assembly 11 is fixedly connected to the middle component of the front axle and is used to lock and fix the front axle and support and position the front axle; in order to highly simulate the actual operating conditions of the test sample, it not only ensures the test angle of the front axle or test sample, but also reflects the response of the test sample.

[0108] Furthermore, the sample restraint assembly 12 includes:

[0109] A first supporting structure 121 and a second supporting structure 122; wherein, the axes of the first supporting structure 121 and the second supporting structure 122 coincide; and the first supporting structure 121 is rotatably connected to the lower arm of the U-shaped supporting arm 111, and the second supporting structure 122 is rotatably connected to the upper arm of the U-shaped supporting arm 111; the front end portion of the upper arm and the front end portion of the lower arm of the U-shaped supporting arm 111 are arranged to be inclined upward.

[0110] It can be understood that the front end parts of the upper arm and the lower arm of the U-shaped support arm 111 are arranged to be tilted upward; the advantage of this design is that it can optimize the force transmission path and distribution, and by adjusting the force transmission path and distribution method in the entire structure, it can avoid excessive local force on the front axle, and can more comprehensively evaluate the strength and durability of various parts of the front axle. A further advantage is that the tilted design can make the loading force provided by the loading input system more accurately transmitted at different positions and angles of the steering knuckle. At the same time, this design helps to enhance the stability of the power drive equipment arranged at the lateral force point, effectively prevent the equipment from being displaced, and ensure the reliability and accuracy of the test process.

[0111] Furthermore, the first supporting structure 121 includes:

[0112] A main support shaft 1210, the main support shaft 1210 passing through the lower arm of the U-shaped bracket 111 and being rotatably connected to the lower arm via a bearing assembly;

[0113] A main bottom plate 1211, wherein a fixing groove 1212 matching the bottom of the main support shaft 1210 is provided in the middle of the main bottom plate 1211, and the main bottom plate 1211 is connected to the main support shaft 1210 through the fixing groove 1212 in the middle;

[0114] A fixing groove 1212, wherein an annular flange is provided inwardly on the upper edge of the opening of the fixing groove 1212, and the fixing groove 1212 is fixedly connected to the main support shaft 1210 via the annular flange;

[0115] The central axis of the fixing groove 1212 coincides with the axis of the main support shaft 1210 ; wherein, the inner wall of the fixing groove 1212 is arranged at an angle, and the longitudinal edge line of the inner wall is parallel to the axis of the main support shaft 1210 .

[0116] Among them, the horizontal inclination angle of the front end of the lower arm of the U-shaped support arm 111 is the same as the horizontal inclination angle of the main support shaft 1210, that is, the angle between the bottom edge line of the main support shaft 1210 and the horizontal line is equal to the lifting angle of the front end of the lower arm, such as the angle is 8°.

[0117] It can be understood that the first support structure 121 provided in the present application is used to support and position the lower arm of the U-shaped support arm 111, and enable the lower arm of the U-shaped support arm 111 to rotate and swing at a preset angle relative to the axis of the main support shaft 1210, such as a swing angle of ±36-45°.

[0118] Furthermore, the second support structure 122 includes: a ball stud 1220, a support beam 1221 and a support assembly;

[0119] The bottom of the ball stud 1220 is rotatably connected to the ball bearing on the lower arm of the U-shaped support arm 111; the middle portion of the support beam 1221 is sleeved on the ball stud 1220 and threadedly connected to the ball stud 1220; both ends of the support beam 1221 are fixedly connected to the support assembly; and the longitudinal centerline of the support beam 1221 coincides with the axis of the ball stud 1220;

[0120] The support assembly includes: beam brackets 1222 symmetrically arranged at both ends of the support beam 1221; each beam bracket 1222 is welded and fixed to the corresponding end of the support beam 1221; each beam bracket 1222 is fixedly connected to the large bracket 1223 on the side away from the support beam 1221.

[0121] Among them, the overall shape of the support beam 1221 is an I-shape; the front end and the rear end of the support beam 1221 are fixedly welded with a support assembly, and the horizontal inclination angle of the support beam 1221 is the same as the horizontal inclination angle of the main support shaft 1210.

[0122] A reinforcement plate 1224 is provided on the top and one side bottom of each large bracket 1223 .

[0123] It can be understood that, through the cooperation of the two crossbeam brackets 1222 and the two large brackets 1223 , the upper arm support and positioning function of the U-shaped support arm 111 is achieved, thereby ensuring the stability of the swing of the U-shaped support arm 111 .

[0124] In this embodiment, the performance test of the test sample of a single-side wheel hub 224 can be completed through the front axle lateral test device, and during the test, the steering knuckle can remain stationary, and by driving the front axle to swing, the lateral performance test of the vehicle's front axle steering angle can be achieved.

[0125] It should be noted that during the lateral performance test of the front axle steering angle, this application fully incorporates the structural characteristics of the front axle assembly, such as precisely adapting the installation and force patterns of components such as the steering knuckle and tie rod, to ensure that the structure of the test specimen is more closely aligned with the actual product application scenario. On the one hand, by simulating the force angle and motion state under real-world working conditions, measurement accuracy is guaranteed; on the other hand, the modular design and convenient operation process significantly improve the convenience of testing, providing an efficient and reliable solution for commercial vehicle front axle performance testing.

[0126] In combination with the above, the present application provides a test sample, including the front axle lateral test device;

[0127] The test sample further includes: a front axle 21 and a fixing structure 22;

[0128] One end of the front axle 21 is rotatably connected to the fixed structure 22;

[0129] The fixing structure 22 includes:

[0130] Left steering knuckle 220 and right steering knuckle 221; wherein the left steering knuckle 220 and the right steering knuckle 221 are respectively rotatably connected to the two ends of the front axle 21; the left steering knuckle or the right steering knuckle is fixedly connected to the corresponding end of the steering trailing rod 223 through the steering knuckle arm 222; a wheel hub 224 is fixedly provided on the outer side of the left steering knuckle or the right steering knuckle; a side load arm 225 is detachably connected to the outer side of each wheel hub 224;

[0131] The front axle 21, the left and right sides of the front axle 21 are both rotatably connected to the kingpin 23 on the left steering knuckle 220 or the right steering knuckle via a steering tie rod 226;

[0132] The axis of the main pin 23 coincides with the axis of the ball stud 1220 and the axis of the main support shaft 1210 .

[0133] The point where the bottom of the side-loading lever arm 225 contacts the ground serves as the connection point P1 between the power drive device and the side-loading lever arm 225. P1 is the center point of contact with the tire on the actual vehicle. By setting this point as the location where the power drive device applies the lateral force Fy, the action and transmission path of the ground lateral force during actual vehicle driving can be accurately simulated, ensuring that the test conditions closely match the real-world scenario and improving the accuracy of the front axle lateral performance test.

[0134] On the other hand, the present application provides a front axle lateral testing method, which is applied to the front axle lateral testing device; the method comprises the following steps:

[0135] Step S1: constructing a steering angle and lateral force load database based on pre-collected steering angle and lateral force load data;

[0136] Step S2: Analyze and process the steering angle and lateral force load database to obtain target data of the steering angle and lateral force load;

[0137] Step S3: Based on the target data of the steering angle and the lateral force load, a preset test method is used to obtain lateral force data corresponding to the steering angle in a steady state; the lateral force data includes: a maximum lateral force and a minimum lateral force corresponding to the steering angle;

[0138] Step S4: Based on the lateral force data, detecting the response data of the test sample; the response data at least includes: stress distribution, strain, displacement change and fatigue damage state.

[0139] Specifically, the present application can pre-collect the steering angle and lateral force load data of similar models within the past month, and use this as the basic component database; by analyzing the characteristics of the database, determine whether it meets the test requirements (such as mean and standard deviation calculation), and process the data that meets the test requirements, including removing outliers, filtering, interpolation, data compression and other operations, to obtain the target data of steering angle and lateral force load; repeatedly apply the processed load spectrum to the test object, such as the test sample. By continuously iterating the loading, observing the response of the test object under the action of repeated loads, so as to more accurately simulate the situation in which the components are subjected to long-term cyclic loads in actual use, thereby evaluating its fatigue performance, reliability and other indicators. In each iteration, the size, direction and loading sequence of the load are carried out in accordance with the loading spectrum regulations of the test device; by using sine waves for loading, the test of the front axle under the action of stable alternating lateral force is completed, and its performance under this steady-state stress condition is observed.

[0140] It can be understood that after the load spectrum iteration and other testing processes, this application selects a specific steering angle and uses a sine wave to perform a steady-state loading test at this angle. This test accurately obtains the response of the front axle when a stable alternating force is applied, and further obtains its performance data under this steady-state stress state, including the failure time of the front axle or the cracking of the front axle or the service life of the front axle. For example, non-destructive testing technology (ultrasonic testing, magnetic particle testing) is used to regularly check whether fatigue cracks appear on the surface and inside of the front axle, and its fatigue damage state is evaluated, thereby accurately obtaining the performance data of the test sample, saving cost and time.

[0141] On the other hand, the present application provides a front axle lateral testing system, comprising:

[0142] a data construction module configured to construct a steering angle and lateral force load database based on pre-collected steering angle and lateral force load data;

[0143] a first processing module configured to analyze and process the steering angle and lateral force load database to obtain target data of the steering angle and lateral force load;

[0144] a second processing module configured to obtain lateral force data corresponding to the steering angle in a steady state using a preset testing method based on the target data of the steering angle and the lateral force load; the lateral force data including: a maximum lateral force and a minimum lateral force corresponding to the steering angle;

[0145] The test module is configured to detect response data of the test sample based on the lateral force data; the response data at least includes: stress distribution, strain, displacement change and fatigue damage state.

[0146] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of this application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0147] On the other hand, the present application provides a computer device comprising a memory, a processor and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the method.

[0148] On the other hand, the present application provides a computer-readable storage medium having a computer program / instruction stored thereon, which implements the steps of the method when the computer program / instruction is executed by a processor.

[0149] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A front axle lateral testing device, characterized in that: include: Load input system and steering angle swing system (1); The loading input system is configured to provide lateral loading to the test sample and drive the steering angle swing system (1) to drive the front axle of the test sample to swing according to a preset angle; The steering angle swing system (1) is configured to support the test sample and enable the test sample to drive the front axle of the test sample to swing according to a preset angle under the action of the loading input system.

2. The front axle lateral testing device according to claim 1, characterized in that: The loading input system includes: at least two power drive devices; A power drive device for applying a lateral force to a lateral force receiving point of the test specimen, wherein the lateral force receiving point is a contact point between the fixed structure of the test specimen and the ground; The other power driving device is used to provide a longitudinal driving force to the steering angle swing system (1), so as to drive the steering angle swing system (1) to drive the front axle of the test sample to swing back and forth at a preset angle relative to the fixed structure.

3. The front axle lateral testing device according to claim 2, characterized in that: The steering angle swing system (1) comprises: Front axle bracket assembly (11) and sample restraint assembly (12); The front axle support assembly (11) is configured to support and position the front axle and drive the front axle to swing relative to the sample restraint assembly (12) or the fixed structure of the test sample; The sample restraint assembly (12) is rotatably connected to the front axle support assembly (11); the sample restraint assembly (12) is used to restrain the swing angle of the front axle.

4. The front axle lateral testing device according to claim 3, characterized in that: The front axle support assembly (11) comprises: A front axle bracket (110) and a U-shaped bracket (111); wherein the top of the front axle bracket (110) can be connected to the front axle; one side of the front axle bracket (110) is detachably connected to the U-shaped bracket (111), and is rotatably connected to the sample restraint assembly (12) through the U-shaped bracket (111); The front axle bracket (110) comprises: a right leaf spring seat lower plate bracket (1100), an upper bearing column (1101), a lower bearing column (1102), a bearing trapezoidal plate bracket (1103) and a left leaf spring seat lower plate bracket (1104); wherein the middle portion of the right leaf spring seat lower plate bracket (1100) is connected and fixed to the upper portion of the bearing trapezoidal plate bracket (1103) via the upper bearing column (1101), and the bottom portion of the right leaf spring seat lower plate bracket (1100) is connected and fixed to the bottom portion of the bearing trapezoidal plate bracket (1103) via the lower bearing column (1102); and one side of the bearing trapezoidal plate bracket (1103) is fixedly connected to the left leaf spring seat lower plate bracket (1104); Also includes a first locking plate (1105) and a second locking plate (1106); The first locking plate (1105) is detachably connected to the top of the left leaf spring seat lower plate bracket (1104); The second locking plate (1106) is detachably connected to the top of the right leaf spring seat lower plate bracket (1100); The left leaf spring seat lower plate bracket (1104) cooperates with the first locking plate (1105) to lock and fix one end of the front axle, and correspondingly, the right leaf spring seat lower plate bracket (1100) cooperates with the second locking plate (1106) to lock and fix the other end of the front axle; The load-bearing trapezoidal plate support (1103) is rotatably connected to the sample restraint assembly (12) via a U-shaped support arm (111) provided on one side; The bottom of the opening of the U-shaped supporting arm (111) is provided with a swing shaft (112); one side of the swing shaft (112) can be driven and connected to a power driving device.

5. The front axle lateral testing device according to claim 4, characterized in that: A sample restraint assembly (12), comprising: A first supporting structure (121) and a second supporting structure (122); wherein the centers of the first supporting structure (121) and the second supporting structure (122) coincide with each other; and the first supporting structure (121) is rotatably connected to the lower arm of the U-shaped supporting arm (111), and the second supporting structure (122) is rotatably connected to the upper arm of the U-shaped supporting arm (111); and the front end portion of the upper arm and the front end portion of the lower arm of the U-shaped supporting arm (111) are arranged to be tilted upward.

6. The front axle lateral testing device according to claim 5, characterized in that: The first supporting structure (121) comprises: A main support shaft (1210), the main support shaft (1210) passes through the lower support arm of the U-shaped support arm (111) and is rotatably connected to the lower support arm via a bearing assembly; A main bottom plate (1211), wherein a fixing groove (1212) matching the shape of the bottom of the main support shaft (1210) is provided in the middle of the main bottom plate (1211), and the main bottom plate (1211) is connected to the main support shaft (1210) through the fixing groove (1212) in the middle; A fixing groove (1212), wherein an annular flange is provided inwardly on the upper edge of the opening of the fixing groove (1212), and is fixedly connected to the main support shaft (1210) via the annular flange; The central axis of the fixing groove (1212) coincides with the axis of the main support shaft (1210); wherein, the inner wall of the fixing groove (1212) is arranged at an angle, and the longitudinal edge line of the inner wall is parallel to the axis of the main support shaft (1210).

7. The front axle lateral testing device according to claim 6, characterized in that: The second supporting structure (122) comprises: a ball stud (1220), a supporting beam (1221), and a supporting assembly; The bottom of the ball pin (1220) is rotatably connected to the ball bearing on the lower arm of the U-shaped support arm (111); the middle portion of the support beam (1221) is sleeved on the ball pin (1220) and is threadedly connected to the ball pin (1220); the front and rear ends of the support beam (1221) are fixedly connected to the support assembly; and the longitudinal centerline of the support beam (1221) coincides with the axis of the ball pin (1220); The support assembly comprises: beam supports (1222) symmetrically arranged at both ends of the support beam (1221); each beam support (1222) is welded and fixed to the corresponding end of the support beam (1221); and each beam support (1222) is fixedly connected to a large support (1223) on a side away from the support beam (1221).

8. A test sample, characterized in that: A front axle lateral test device according to any one of claims 1 to 7 is used for testing; The test sample also includes: a front axle (21) and a fixing structure (22); One end of the front axle (21) is rotatably connected to a fixed structure (22); The fixing structure (22) comprises: A left steering knuckle (220) and a right steering knuckle (221); wherein the left steering knuckle (220) and the right steering knuckle (221) are respectively rotatably connected to the two ends of the front axle (21); the left steering knuckle or the right steering knuckle is fixedly connected to the steering longitudinal tie rod (223) at the corresponding end through the steering knuckle arm (222) on the corresponding side; a wheel hub (224) is fixedly provided on the outer side of the left steering knuckle or the right steering knuckle; and a side load arm (225) is detachably connected to the outer side of each wheel hub (224); A front axle (21), wherein both the left and right sides of the front axle (21) are rotatably connected to a kingpin (23) on a left steering knuckle (220) or a right steering knuckle via a steering tie rod (226); The axis of the main pin (23) coincides with the axis of the ball stud (1220) and the axis of the main support shaft (1210).

9. A front axle lateral testing method, characterized in that: The front axle lateral testing device according to any one of claims 1 to 7 comprises the following steps: Step S1: constructing a steering angle and lateral force load database based on pre-collected steering angle and lateral force load data; Step S2: Analyze and process the steering angle and lateral force load database to obtain target data of the steering angle and lateral force load; Step S3: Based on the target data of the steering angle and the lateral force load, a preset test method is used to obtain lateral force data corresponding to the steering angle in a steady state; the lateral force data includes: a maximum lateral force and a minimum lateral force corresponding to the steering angle; Step S4: Based on the lateral force data, detecting the response data of the test sample; the response data at least includes: stress distribution, strain, displacement change and fatigue damage state.

10. A front axle lateral testing system, characterized in that: include: a data construction module configured to construct a steering angle and lateral force load database based on pre-collected steering angle and lateral force load data; a first processing module configured to analyze and process the steering angle and lateral force load database to obtain target data of the steering angle and lateral force load; a second processing module configured to obtain lateral force data corresponding to the steering angle in a steady state using a preset testing method based on the target data of the steering angle and the lateral force load; The lateral force data includes: a maximum lateral force and a minimum lateral force corresponding to the steering angle; The test module is configured to detect response data of the test sample based on the lateral force data; the response data at least includes: stress distribution, strain, displacement change and fatigue damage state.

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