Steering knuckle and steering arm integrated endurance test device and method and storage medium
By designing a highly integrated steering joint steering arm integrated durability test device, the problem of large space occupied by the test device and complex adjustment in the prior art is solved, and an efficient and flexible test process is achieved.
Patent Information
- Application Number
- CN202411799435.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-04-11
AI Technical Summary
In the prior art, the construction of the bench for the durability test of the steering knuckle steering arm has problems such as time-consuming and laborious and large space occupancy, especially during the adjustment and maintenance process.
A steering knuckle steering arm integrated durability test device is designed, which includes a body system, a dynamic integrated hydraulic actuator, a steering knuckle restraint tooling, a steering knuckle loading tooling and an auxiliary tooling. Through the integration of these components, stable constraints and efficient loading of the steering knuckle are achieved.
The device reduces the space occupied by the test device, improves the efficiency and flexibility of the test, simplifies the adjustment and maintenance process of the test device, and reduces the complexity and cost of operation.
Smart Images
Figure CN119803967A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of automobile chassis component testing, and in particular to a steering knuckle and steering arm integrated durability testing device, method and storage medium. Background Art
[0002] The steering knuckle is an important automobile chassis component. During the development phase of the steering knuckle, it is necessary to conduct a safety performance test. The steering arm durability test of the steering knuckle is a test item required by most OEMs, and the test load direction is perpendicular to the knuckle flange surface.
[0003] In the related art, there are two ways to build a test bench for the steering knuckle and steering arm durability test: in the first way, the steering knuckle is vertically constrained to simulate the actual vehicle state, and the hydraulic actuator is arranged horizontally; in the second way, the steering knuckle is arranged horizontally, and the hydraulic actuator is arranged vertically.
[0004] However, in the related art, the first method requires adjusting the up and down position of the steering knuckle or the hydraulic actuator according to the different steering knuckles, and the adjustment requires the use of an overhead crane. The second method is convenient for adjusting the steering knuckle, but the hydraulic actuator needs to be mounted on a gantry. Both of these bench construction methods have the disadvantages of being time-consuming and labor-intensive, and the bench takes up a large space. Summary of the invention
[0005] The present application provides a knuckle and steering arm integrated durability test device, method and storage medium to solve the above problems. The technical solution is as follows: In a first aspect, a knuckle-steering arm integrated durability test device is provided, the knuckle-steering arm integrated durability test device comprising: a main body system, a dynamic integrated hydraulic actuator, a knuckle restraint tooling, a knuckle loading tooling and an auxiliary tooling; The body system is used to support the dynamic integrated hydraulic actuator, the steering knuckle restraint tooling, the steering knuckle loading tooling and the auxiliary tooling; The dynamic integrated hydraulic actuator is vertically fixed inside the main body system and is used to connect the steering knuckle loading tooling to drive the steering knuckle loading tooling to apply a load to the steering knuckle to be tested; The steering knuckle restraint tool is located on the upper end surface of the main body system and is used to fix the steering knuckle to be tested; The steering knuckle loading tool is used to connect the steering tie rod matched with the steering knuckle to be tested, so as to apply the load to the steering knuckle to be tested through the steering tie rod; The auxiliary tooling is used to adjust the direction of the steering knuckle loading tooling so that the steering knuckle loading tooling and the upper end surface of the main body system are perpendicular.
[0006] In a possible embodiment, the dynamic integrated hydraulic actuator includes: a force sensor, a displacement sensor, a power valve group, a heat dissipation assembly, an integrated oil cylinder-oil tank and a pre-pressure air filter; the force sensor is connected to the piston rod of the integrated oil cylinder-oil tank through a connecting ring, and is used to collect the load applied by the piston rod; the displacement sensor is located at the rear end of the integrated oil cylinder-oil tank; the power valve group is used to drive the piston rod of the integrated oil cylinder-oil tank; the heat dissipation assembly is located on both sides of the integrated oil cylinder-oil tank, and is used to reduce the heat of the integrated oil cylinder-oil tank; the integrated oil cylinder-oil tank is used to drive the steering knuckle loading tooling; the pre-pressure air filter is used to protect the integrated oil cylinder-oil tank.
[0007] In a possible implementation manner, the rated load of the dynamic integrated hydraulic actuator is ±100 kN, and the working stroke of the dynamic integrated hydraulic actuator is 200 mm.
[0008] In a possible embodiment, the main body system includes a first mounting platform, a second mounting platform, a first pillar, a second pillar, a first baffle and a second baffle; the first pillar is fixed on the ground, and the first pillar is used to support the first mounting platform; the second pillar is fixed on the first mounting platform, and the second pillar is used to support the second mounting platform; the second mounting platform includes a center hole, and the center hole is used for the steering knuckle loading tooling to pass through; the first baffle is located on the outside of the first pillar, and is used to protect the components inside the main body system; the second baffle is located on the outside of the second pillar, and is used to protect the components.
[0009] In a possible implementation manner, the upper surface of the second mounting platform includes T-shaped grooves in longitudinal and transverse directions for mounting the steering knuckle restraint tooling, the steering knuckle loading tooling and the auxiliary tooling.
[0010] In a possible embodiment, the number of the first pillars is four, and the number of the second pillars is four; the four first pillars are arranged in a rectangular shape, and the second pillars are arranged in a rectangular shape; at least one first baffle between two adjacent first pillars includes a first window to facilitate maintenance of the component; and at least one second baffle between two adjacent second pillars includes a second window to facilitate maintenance of the component.
[0011] In a possible implementation manner, the material of the second baffle is transparent, so as to display the stroke of the dynamic integrated hydraulic actuator.
[0012] In a possible embodiment, the steering knuckle constraint tooling includes: a base plate, a pedestal and a flange; the base plate is fixed on the second mounting platform to support the base and the flange; the base is used to connect the base plate and the flange; the flange is used to fix the steering knuckle to be tested, and the specifications of the bolt holes of the flange match the steering knuckle to be tested.
[0013] In a possible embodiment, the steering knuckle loading tooling includes a U-shaped block, a spherical bearing and a connecting rod; the U-shaped block is used to connect to the piston rod of the dynamic integrated hydraulic actuator, and the top of the U-shaped block is connected to the spherical bearing; the spherical bearing is connected to the connecting rod; the connecting rod is used to connect the steering rod.
[0014] In a possible embodiment, the auxiliary tooling includes: two right-angle blocks and two switch-type magnetic seats; the two right-angle blocks are spliced together to form a hollow cylinder, and the diameter of the hollow cylinder matches the diameter of the connecting rod; the two switch-type magnetic seats are used to respectively fix the two right-angle blocks on the second mounting platform.
[0015] In a possible implementation, the device further includes steps surrounding the body system.
[0016] A second aspect provides a knuckle-steering arm integrated durability test method, the method is applied to a knuckle-steering arm integrated durability test device, the device comprising a main body system, a dynamic integrated hydraulic actuator, a knuckle restraint tool, a knuckle loading tool and an auxiliary tool; the method comprises: Assembling a steering knuckle restraint tool, and connecting a steering knuckle to be tested based on the steering knuckle restraint tool; Assembling the steering knuckle loading tool, and connecting the steering tie rod matching the steering knuckle to be tested based on the steering knuckle loading tool; Connecting the knuckle loading tooling and the dynamic integrated hydraulic actuator; Assembling the auxiliary tooling, and adjusting the direction of the steering knuckle loading tooling based on the auxiliary tooling so that the steering knuckle loading tooling and the upper end surface of the main body system are perpendicular; Adjusting the stroke of the dynamic integrated hydraulic actuator and the position of the steering knuckle restraint tooling on the body system so that the steering tie rod is connected to the steering knuckle to be tested; Install the steering knuckle restraint tool on the upper end surface of the main body system; Removing the auxiliary tooling; The steering knuckle and steering arm integrated durability test device is operated based on the steering arm durability test data of the steering knuckle to be tested.
[0017] In a third aspect, a computer-readable storage medium is provided, in which at least one computer program is stored. The at least one computer program is loaded and executed by a processor so that a computer implements the steering knuckle and steering arm integrated durability test method as described in the second aspect.
[0018] The technical solution provided by this application brings at least the following beneficial effects: The technical solution provided in the present application assembles a main body system, a dynamic integrated hydraulic actuator, a steering knuckle restraint tooling, a steering knuckle loading tooling and an auxiliary tooling into one device, thereby reducing the space occupied by the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0020] Figure 1 It is a structural schematic diagram of a steering knuckle and steering arm integrated durability test device provided by the present application; Figure 2 It is a schematic diagram of the split structure of a steering knuckle and steering arm integrated durability test device provided by the present application; Figure 3 It is a structural schematic diagram of a dynamic integrated hydraulic actuator provided by the present application; Figure 4 It is a structural schematic diagram of a body system provided by this application; Figure 5 It is a structural schematic diagram of a steering knuckle restraint tooling provided by the present application; Figure 6 It is a structural schematic diagram of a steering knuckle loading tooling provided by the present application; Figure 7 It is a structural schematic diagram of an auxiliary tooling provided in this application.
[0021] Figure numerals: main body system 1, dynamic integrated hydraulic actuator 2, steering knuckle 3, steering knuckle constraint tooling 4, steering knuckle loading tooling 5, auxiliary tooling 6, step 7, first mounting platform 101, second mounting platform 102, first pillar 103, second pillar 104, first baffle 105, second baffle 106, force sensor 201, displacement sensor 202, power valve group 203, heat dissipation assembly 204, integrated cylinder-oil tank 205, pre-pressure air filter 206, bottom plate 401, base 402, flange 403, U-shaped block 501, spherical bearing 502, connecting rod 503, steering rod 504, right-angle block 601, switch type magnetic seat 602. DETAILED DESCRIPTION
[0022] In order to make the objectives, technical solutions and advantages of the present application more clear, the present application will be further described in detail below in conjunction with the accompanying drawings.
[0023] It should be noted that the terms "first", "second", etc. (if any) in the specification of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of applications consistent with some aspects of the present application.
[0024] As a core component in the automobile chassis system, the performance of the steering knuckle is directly related to the vehicle's handling stability, driving safety, and ride comfort. Therefore, strict safety performance tests are required during the design and development phase of the steering knuckle. Among them, the steering arm durability test of the steering knuckle is one of the key test items generally required by major OEMs. This test is designed to simulate the stress conditions of the steering arm under long-term use, verify its structural strength and durability, and ensure that there will be no safety hazards such as breakage or excessive wear during actual driving. The load direction of this test is usually set to be perpendicular to the steering knuckle flange surface to restore the stress state under real working conditions to the greatest extent.
[0025] In the relevant technical system, there are mainly two solutions for the construction of the test bench for the durability test of the steering knuckle and steering arm: The first solution is to simulate the vertical constraint layout under the actual vehicle state, that is, the steering knuckle is fixed in a vertical posture, and the hydraulic actuator is arranged horizontally to apply a force perpendicular to the steering knuckle flange surface. The advantage of this layout is that it can more realistically restore the force state of the vehicle during driving, but the disadvantage is that due to the differences in the size and installation position of the steering knuckles of different models and designs, detailed adjustments need to be made according to the specific situation of the steering knuckle before each test, including the up and down position changes of the steering knuckle itself or the hydraulic actuator. This process often requires the use of large lifting equipment such as overhead cranes, which is not only complicated to operate, but also increases safety hazards and cost burdens.
[0026] The second solution is to arrange the steering knuckle horizontally, and accordingly, the hydraulic actuator is installed vertically, usually on a gantry. The advantage of this layout is that the installation and adjustment of the steering knuckle is relatively simple, and there is no need to frequently adjust the position of the actuator. However, the construction and maintenance costs of the gantry are high, and it occupies a large test space, which is undoubtedly a major limiting factor for laboratories or production lines with limited space resources. In addition, once the installation position and height of the gantry are determined, it is difficult to adjust flexibly, which limits the flexibility and versatility of the test.
[0027] In summary, both the first and second solutions have the problems of complex operation, high cost and large space occupation, which to some extent limits the efficiency and quality of the steering knuckle durability test. Therefore, exploring a more efficient, flexible and cost-effective bench construction solution has become a technical problem that needs to be solved urgently in the current automotive industry.
[0028] The present application provides a knuckle and steering arm integrated durability test device, thereby reducing the space occupied by the knuckle and steering arm integrated durability test device. Figure 1 , Figure 1 This is a schematic diagram of the structure of a steering knuckle and steering arm integrated durability test device provided in this application. Figure 2 A schematic diagram of the split structure of a steering knuckle and steering arm integrated durability testing device is shown.
[0029] The steering knuckle and steering arm integrated durability test device comprises a main body system 1, a dynamic integrated hydraulic actuator 2, a steering knuckle constraint tooling 4, a steering knuckle loading tooling 5 and an auxiliary tooling 6; the main body system 1 is used to support the dynamic integrated hydraulic actuator 2, the steering knuckle constraint tooling 4, the steering knuckle loading tooling 5 and the auxiliary tooling 6; the dynamic integrated hydraulic actuator 2 is vertically fixed inside the main body system 1, and is used to connect the steering knuckle loading tooling 5 to drive the steering knuckle loading tooling 5 to apply a load to the steering knuckle 3 to be tested; the steering knuckle constraint tooling 4 is located on the upper end surface of the main body system 1, and is used to fix the steering knuckle 3 to be tested; the steering knuckle loading tooling 5 is used to connect the steering rod matched with the steering knuckle 3 to be tested, so as to apply a load to the steering knuckle 3 to be tested through the steering rod; the auxiliary tooling 6 is used to adjust the direction of the steering knuckle loading tooling 5, so that the steering knuckle loading tooling 5 and the upper end surface of the main body system 1 are perpendicular.
[0030] The main body system 1 is the foundation and support structure of the entire test device. It is responsible for supporting and fixing all other key components to ensure the stability and accuracy of each component during the test. The main body system 1 is designed to be sturdy and durable to withstand the high loads and vibrations generated during the test. The internal design has a reasonable space layout to install and fix the dynamic integrated hydraulic actuator 2.
[0031] The dynamic integrated hydraulic actuator 2 is the power source of the test device, responsible for generating and controlling the load applied to the steering knuckle 3. The actuator is vertically fixed inside the main body system 1, and through a high-precision hydraulic control system, it can simulate the complex loads on the steering knuckle 3 in actual driving, such as sine waves, square waves, etc. The output force is stable and controllable, and can meet the requirements of different test standards.
[0032] The steering knuckle restraint fixture 4 is used to fix the steering knuckle 3 to be tested, ensuring that the position and posture of the steering knuckle 3 remain stable during the test. The fixture is designed with a fixture and a fixture that matches the steering knuckle 3, which can firmly clamp the steering knuckle 3 to prevent it from moving or deforming during the test. At the same time, it also provides necessary adjustment functions to adapt to different sizes and shapes of the steering knuckle 3.
[0033] The knuckle loading fixture 5 is a bridge connecting the knuckle 3 and the dynamic integrated hydraulic actuator 2, and is responsible for transferring the load generated by the actuator to the knuckle 3. The fixture is designed with an interface that matches the steering tie rod, which can easily connect and fix the steering tie rod. Through the steering tie rod, the force generated by the actuator can be transferred to the steering arm of the knuckle 3 to simulate the force conditions in actual driving. The main function of the auxiliary fixture 6 is to adjust the direction of the knuckle loading fixture 5 to ensure that it is perpendicular to the upper end surface of the main system 1.
[0034] See also Figure 3A structural schematic diagram of a dynamic integrated hydraulic actuator 2 is shown, and the dynamic integrated hydraulic actuator 2 includes: a force sensor 201, a displacement sensor 202, a power valve group 203, a heat dissipation component 204, an integrated cylinder-oil tank 205 and a pre-pressure air filter 206; the force sensor 201 is connected to the piston rod of the integrated cylinder-oil tank 205 through a connecting ring, and is used to collect the load applied by the piston rod; the displacement sensor 202 is located at the rear end of the integrated cylinder-oil tank 205; the power valve group 203 is used to drive the piston rod of the integrated cylinder-oil tank 205; the heat dissipation component 204 is located on both sides of the integrated cylinder-oil tank 205, and is used to reduce the heat of the integrated cylinder-oil tank 205; the integrated cylinder-oil tank 205 is used to drive the steering knuckle loading tooling 5; the pre-pressure air filter 206 is used to protect the integrated cylinder-oil tank 205.
[0035] The force sensor 201 is a key element for measuring and recording the load applied by the piston rod to the steering knuckle 3. Through direct connection with the piston rod (or connection through a connecting ring), the various force values generated during the test can be accurately captured. The force sensor 201 has the characteristics of high sensitivity, high precision and fast response, which can ensure the accuracy and reliability of the test data. The collected force value signal can be converted into an electrical signal and transmitted to the data acquisition system through a data line for subsequent analysis and processing.
[0036] The displacement sensor 202 is used to monitor and record the displacement changes of the piston rod of the integrated oil cylinder-oil tank 205. Installed at the tail end of the oil cylinder, it can provide real-time feedback on the expansion and contraction of the piston rod. The displacement sensor 202 has the characteristics of high precision, high resolution and strong anti-interference ability. It can ensure that the displacement changes of the piston rod are accurately captured during the test, providing important data support for evaluating the deformation and displacement of the steering knuckle 3.
[0037] The power valve group 203 is the core component that drives the piston rod of the integrated oil cylinder-tank 205. It is responsible for receiving instructions from the control system and accurately controlling the speed, direction and force of the piston rod by adjusting the opening and closing of the valve and the flow rate. The power valve group 203 usually adopts advanced proportional valve or servo valve technology, which has the characteristics of fast response speed, high control accuracy and good stability. It can flexibly adjust the movement parameters of the piston rod according to the test requirements to ensure the smooth progress of the test.
[0038] The heat dissipation component 204 is used to reduce the heat generated by the integrated oil cylinder-oil tank 205 during operation to prevent the oil temperature from being too high, which may cause the equipment to degrade in performance or be damaged. The heat dissipation component 204 generally includes components such as heat sinks, fans, and cooling water channels. By increasing the heat dissipation area, improving the heat dissipation efficiency, and optimizing the heat dissipation path, the heat generated by the oil cylinder is effectively dissipated into the air or circulating water to ensure that the oil temperature is always kept within a safe range. Among them, the heat dissipation component 204 is fixed on both sides of the integrated oil cylinder-oil tank 205, and the power valve group 203 and the pre-pressure air filter 206 are fixed on the upper side of the integrated oil cylinder-oil tank 205.
[0039] The integrated oil cylinder-tank 205 is the main part of the dynamic integrated hydraulic actuator 2, integrating the functions of the oil cylinder and the oil tank, and is used to store and provide hydraulic oil, while driving the piston rod to reciprocate. The integrated oil cylinder-tank 205 has a compact design and a reasonable structure, which can make full use of space and improve the overall performance and reliability of the equipment. It is made of high-strength materials and can withstand high pressure and harsh working environments to ensure the smooth progress of the test.
[0040] The pre-pressure air filter 206 is used to protect the integrated oil cylinder-oil tank 205 from external impurities and pollutants. It is usually installed at the air inlet or oil return port of the oil tank, and can filter out impurities such as dust, particles and moisture in the air to ensure that the hydraulic oil entering the oil cylinder is clean and pure. The pre-pressure air filter 206 has the characteristics of high filtering efficiency, long service life and easy replacement. It can effectively protect the oil cylinder and oil tank from damage by pollutants and extend the service life and performance of the equipment.
[0041] Optionally, the rated load of the dynamic integrated hydraulic actuator 2 is ±100 kN, and the working stroke of the dynamic integrated hydraulic actuator 2 is 200 mm.
[0042] See also Figure 4 A structural schematic diagram of a main body system 1 is shown, wherein the main body system 1 includes a first mounting platform 101, a second mounting platform 102, a first pillar 103, a second pillar 104, a first baffle 105 and a second baffle 106; the first pillar 103 is fixed on the ground, and the first pillar 103 is used to support the first mounting platform 101; the second pillar 104 is fixed on the first mounting platform 101, and the second pillar 104 is used to support the second mounting platform 102; the second mounting platform 102 includes a center hole, and the center hole is used for the steering knuckle loading tooling 5 to pass through; the first baffle 105 is located on the outside of the first pillar 103, and is used to protect the components inside the main body system 1; the second baffle 106 is located on the outside of the second pillar 104, and is used to protect the components.
[0043] The first pillar 103 is located at the bottom of the entire main body system 1 and is directly fixed to the ground. The main function of the first pillar 103 is to provide support, firmly supporting the first mounting platform 101 above to ensure the stability of the entire system. The first mounting platform 101 is located above the first pillar 103 and is supported by the first pillar 103. The first mounting platform 101 serves as a bridge connecting the first pillar 103 and the second pillar 104, and also provides a stable installation foundation for the second pillar 104. In addition, the internal space formed between the first pillar 103 and the first mounting platform 101 is used to place the dynamic integrated hydraulic actuator 2.
[0044] The second support column 104 is fixed above the first mounting platform 101, further supporting the second mounting platform 102 above. The main task of the second support column 104 is to support the second mounting platform 102, ensuring that it can stably carry various test equipment or tooling. The second mounting platform 102 is located at the top of the entire main body system 1 and is supported by the second support column 104. The second mounting platform 102 is designed with a center hole, the purpose of which is to allow the knuckle loading tool 5 to pass through, thereby realizing the loading and testing of the knuckle 3.
[0045] The first baffle 105 is located outside the first support 103, and the second baffle 106 is located outside the second support 104. The two baffles are used to provide protection to prevent external objects or personnel from accidentally contacting the components inside the main system 1, thereby ensuring the safety of the test process and the integrity of the components.
[0046] In summary, the main body system 1 ensures the stability and safety of the entire system through layered design and reasonable support structure. At the same time, the central hole design of the second mounting platform 102 and the protection of the baffle plate enable the steering knuckle loading tool 5 to pass smoothly and perform accurate loading tests.
[0047] In a possible implementation manner, the upper surface of the second mounting platform 102 includes T-shaped grooves in longitudinal and transverse directions for mounting the steering knuckle restraining tool 4 , the steering knuckle loading tool 5 and the auxiliary tool 6 .
[0048] The T-slot is a groove of a specific shape processed on a metal plate, and its cross section is in the shape of a "T". On the upper surface of the second mounting platform 102, the T-slots are carefully arranged in a criss-cross grid, providing multiple possibilities and positioning points for the installation of the tooling components. By designing the bottom of the tooling to be a shape that matches the T-slot (such as a T-shaped slider), the tooling can be easily installed on the platform and fixed by fasteners such as bolts and nuts.
[0049] Optionally, due to the continuity of the T-slot, the tooling assembly can be fine-tuned along the direction of the slot to achieve precise position and angle adjustment. This is essential to ensure the accuracy and stability of the tooling assembly during the test. In addition, the design of the T-slot enables the second mounting platform 102 to adapt to a variety of tooling assemblies of different sizes and shapes. The versatility not only improves the flexibility of the test device, but also reduces the cost and time of replacing the tooling.
[0050] With the T-slot design, the installation process of the tooling assembly becomes simpler and faster. The operator only needs to align the T-slot of the tooling with the T-slot on the platform, then slide it along the direction of the slot to the desired position, and finally fix it with fasteners. The T-slot design reduces the positioning and calibration steps required during the installation process, thereby shortening the preparation time of the test device and improving overall work efficiency.
[0051] Accurate tool positioning and fixation help ensure that the load and constraint conditions on the steering knuckle 3 during the test are consistent with expectations, thereby improving the accuracy of the test results. Stable tool installation and reliable fixation methods help reduce vibration and shaking during the test and enhance the reliability and stability of the test device.
[0052] In a possible embodiment, the number of first pillars 103 is four, and the number of second pillars 104 is four; the four first pillars 103 are arranged in a rectangular shape, and the second pillars 104 are arranged in a rectangular shape; at least one first baffle 105 between two adjacent first pillars 103 includes a first window to facilitate maintenance of the component; and at least one second baffle 106 between two adjacent second pillars 104 includes a second window to facilitate maintenance of the component.
[0053] There are four first pillars 103 arranged in a rectangular shape. The above design ensures the stable support of the first mounting platform 101 on the ground, and is able to bear the weight of all components above and various loads generated during the test. The rectangular arrangement not only provides a uniform distribution of supporting force, but also helps to maintain the balance and stability of the entire test device. There are also four second pillars 104 arranged in a rectangular shape. The second pillars 104 are responsible for stably supporting the second mounting platform 102 and all components thereon on the first mounting platform 101. The rectangular arrangement enables the second mounting platform 102 to evenly distribute weight and reduce the risk of deformation or damage due to local overload.
[0054] At least one first baffle 105 between two adjacent first pillars 103 includes a first window. The first window is designed to facilitate the maintenance and inspection of the components below the first mounting platform 101. During the operation of the test device, it is sometimes necessary to maintain or troubleshoot the components below, such as the transmission mechanism and hydraulic system. The existence of the first window allows operators to easily access these components without disassembling the entire first mounting platform 101, thereby improving maintenance efficiency and operational convenience. At least one second baffle 106 between two adjacent second pillars 104 includes a second window. The design purpose of the second window is the same as that of the first window, both of which are to facilitate the maintenance and inspection of the second mounting platform 102 and the components thereon.
[0055] In a possible implementation manner, the material of the second baffle plate 106 is transparent, so as to display the stroke of the dynamic integrated hydraulic actuator 2 .
[0056] Transparent materials, such as glass, transparent plastics (such as polycarbonate, acrylic, etc.) or transparent composite materials, have the property of allowing light to penetrate. They not only have sufficient strength and durability to meet the requirements of the test device for the baffle, but also can clearly display the objects behind the baffle. Designing the second baffle 106 to be a transparent material allows the operator to directly observe the movement of the dynamic integrated hydraulic actuator 2 (especially the stroke of its piston rod).
[0057] The transparent baffle allows the operator to intuitively see the motion status of the actuator without relying on additional sensors or monitoring systems. This helps to enhance the transparency and traceability of the test process. During the test, if the actuator has abnormal movement or jamming, the operator can immediately observe it through the transparent baffle and take appropriate measures to troubleshoot and repair it. By directly observing the stroke of the actuator, the operator can adjust the test parameters faster and optimize the test process, thereby improving test efficiency.
[0058] In addition, although transparent materials provide good visualization, their strength and durability are also key factors to be considered during design. The selected material must be able to withstand various loads and vibrations during the operation of the test device to ensure the smooth progress of the test. In addition, transparent baffles are prone to accumulate dust and stains, which may affect their perspective effect. Therefore, factors such as easy cleaning and maintenance should be considered during design, such as adopting a structural design that is easy to disassemble and wash.
[0059] See also Figure 5A structural schematic diagram of a steering knuckle restraint tooling 4 is shown, the steering knuckle restraint tooling 4 comprises: a base plate 401, a pedestal 402 and a flange 403; the base plate 401 is fixed on the second mounting platform 102, and is used to support the pedestal 402 and the flange 403; the pedestal 402 is used to connect the base plate 401 and the flange 403; the flange 403 is used to fix the steering knuckle 3 to be tested, and the specifications of the bolt holes of the flange 403 match the steering knuckle 3 to be tested.
[0060] The base plate 401 is the basic support component of the steering knuckle restraint fixture 4 and is directly fixed on the second mounting platform 102. The design of the base plate 401 must be strong enough to withstand the various forces and vibrations generated during the test and ensure the stability of the entire fixture system. The base plate 401 is usually made of materials such as high-strength steel or cast iron, and has excellent mechanical properties and wear resistance. Its size and shape are designed according to the overall layout of the test device and the size of the steering knuckle 3 to ensure perfect matching with the second mounting platform 102.
[0061] The base 402 is located between the bottom plate 401 and the flange 403, and plays a role of connection and support. It is responsible for transferring the fixing force on the bottom plate 401 to the flange 403, ensuring that the flange 403 can stably fix the steering knuckle 3 to be tested. The design of the base 402 takes into account the shape and size of the steering knuckle 3, as well as the stress conditions during the test. It is usually manufactured by casting or welding technology to ensure sufficient strength and rigidity. The base 402 may also include some positioning holes or bosses for accurate positioning and fixing with the bottom plate 401 and the flange 403.
[0062] The flange 403 is a key component of the steering knuckle constraint fixture 4, which is used to fix the steering knuckle 3 to be tested. The design of the flange 403 must ensure that the connection with the steering knuckle 3 is firm and reliable, and at the same time be able to simulate the constraint conditions in actual work. The flange 403 is usually provided with bolt holes, and the specifications of the bolt holes match the connection holes on the steering knuckle 3 to be tested. The steering knuckle 3 can be firmly fixed to the flange 403 by fasteners such as bolts and nuts. In other words, for steering knuckles 3 of different sizes, fixation can be achieved by replacing flanges 403 with different bolt holes. In addition, the design of the flange 403 also takes into account the stress conditions of the steering knuckle 3 during operation to ensure that it can withstand various forces and vibrations generated during the test.
[0063] In order to ensure that the steering knuckle 3 can be accurately mounted on the flange 403, the bolt hole specifications on the flange 403 match the connection holes on the steering knuckle 3 to be tested. This includes parameters such as the diameter, number, distribution and pitch of the bolt holes. During the design process, the steering knuckle 3 to be tested needs to be analyzed and measured in detail to ensure that the bolt hole specifications of the flange 403 completely match it.
[0064] See also Figure 6 A structural schematic diagram of a steering knuckle loading tool 5 is shown, wherein the steering knuckle loading tool 5 includes a U-shaped block 501, a spherical bearing 502 and a connecting rod 503; the U-shaped block 501 is used to connect with the piston rod of the dynamic integrated hydraulic actuator 2, and the upper part of the U-shaped block 501 is connected with the spherical bearing 502; the spherical bearing 502 is connected to the connecting rod 503; the connecting rod 503 is used to connect with the steering tie rod 504.
[0065] The U-block 501 is an important component of the knuckle loading fixture 5, and its main function is to connect the piston rod of the dynamic integrated hydraulic actuator 2. Through precise design and manufacturing, the U-block 501 can ensure that the movement of the piston rod can be smoothly and accurately transmitted to the knuckle 3. The U-block 501 is made of high-strength steel to ensure that it can withstand the huge force and vibration generated during the test. Its shape is designed to be U-shaped so that it fits closely with the piston rod and provides sufficient support area.
[0066] The spherical bearing 502 is located between the U-shaped block 501 and the connecting rod 503, and plays a role of connection and buffering. It can allow the connecting rod 503 to swing or rotate within a certain range, thereby simulating the complex movement of the steering knuckle 3 in actual driving. The spherical bearing 502 usually adopts a self-lubricating or externally lubricated design to reduce friction and wear and increase service life. Its internal structure may contain multiple rolling elements (such as balls or rollers), which can roll between the inner and outer rings of the bearing to achieve smooth movement. The selection and design of the spherical bearing 502 needs to be determined according to the specific requirements of the test and the movement characteristics of the steering knuckle 3.
[0067] The connecting rod 503 is another key component of the steering knuckle loading fixture 5, which is responsible for transmitting the motion of the spherical bearing 502 to the steering tie rod 504. Through the connecting rod 503, the pulling force or thrust of the steering tie rod 504 on the steering knuckle 3 during actual driving can be simulated. The connecting rod 503 is usually made of high-strength and high-precision steel to ensure that it can withstand the huge force during the test and maintain high-precision motion transmission. Its length and shape may be adjusted according to the specific requirements of the test and the layout of the steering knuckle 3. One end of the connecting rod 503 is connected to the spherical bearing 502, and the other end is connected to the steering tie rod 504 by some means (such as a pin, a bolt, etc.).
[0068] During the test, the piston rod of the dynamic integrated hydraulic actuator 2 is connected to the spherical bearing 502 through the U-shaped block 501, and the spherical bearing 502 is connected to the connecting rod 503. When the piston rod reciprocates, it transmits the motion to the connecting rod 503 through the U-shaped block 501 and the spherical bearing 502, and then loads the steering tie rod 504 through the connecting rod 503. The above loading method can simulate the complex forces and motion conditions that the steering knuckle 3 is subjected to during actual driving, so as to evaluate the durability and performance of the steering knuckle 3.
[0069] See also Figure 7 A structural schematic diagram of an auxiliary tooling 6 is shown, the auxiliary tooling 6 includes: two right-angle blocks 601 and two switch-type magnetic seats 602; the two right-angle blocks 601 are spliced together to form a hollow cylinder, and the diameter of the hollow cylinder matches the diameter of the connecting rod 503; the two switch-type magnetic seats 602 are used to fix the two right-angle blocks 601 on the second mounting platform 102 respectively.
[0070] The right-angle block 601 is the core component of the auxiliary tooling 6, and is spliced together to form a hollow cylindrical structure. The diameter of the hollow cylinder is designed to match the diameter of the connecting rod 503 to ensure that the connecting rod 503 can pass through the structure smoothly and accurately. Each right-angle block 601 has a right-angle shape, one surface of which is a plane for contacting the second mounting platform 102, and the other surface has a semi-cylindrical groove for splicing with the groove of another right-angle block 601 to form a complete hollow cylinder.
[0071] The two right-angle blocks 601 can be closely spliced together to form a seamless hollow cylinder through precise processing and matching. The switch-type magnetic seat 602 is used to fix the right-angle block 601 on the second mounting platform 102. It is adsorbed on the platform by magnetic force, providing a fast and convenient fixing method without drilling or bolting.
[0072] The switch-type magnetic base 602 generally has a strong magnetic force and can be firmly adsorbed on the metal surface. A switch mechanism is also included, allowing the user to easily install or remove the magnetic base without damaging the surface of the platform. In addition, the size and shape of the magnetic base are designed to match the bottom surface of the right-angle block 601 to ensure that the right-angle block 601 can be stably placed and fixed on the platform. The auxiliary tooling 6 provides a precise and flexible support structure for the connecting rod 503 through the coordinated work of the right-angle block 601 and the switch-type magnetic base 602, making the test process smoother and more efficient.
[0073] In a possible implementation, the device further includes steps 7 surrounding the main body system 1 .
[0074] The step 7 provides a convenient passage, allowing the operator to easily board or approach the main system 1. By installing the step 7, the designer of the device takes into account the safety of the operator when getting on and off the equipment. The design of the step can ensure that the operator has stable support when moving, reducing the risk of slipping or falling. The presence of the step 7 can also optimize the working environment of the operator. It can enable the operator to work in a more comfortable and natural posture, reducing fatigue and discomfort caused by standing or bending over for a long time.
[0075] The size and layout of the steps 7 need to be determined according to the height, shape of the main system 1 and the needs of the operator. The height, width and depth of the steps should be moderate to ensure that the operator can maintain balance and stability when going up and down. At the same time, the number and distribution of the steps also need to be reasonable so that the operator can move smoothly. The material of the steps 7 should have sufficient strength and durability to withstand the weight of the operator and the wear and tear of daily use. Common materials include steel, aluminum alloy, concrete or composite materials. In addition, the surface of the steps should have anti-slip properties to reduce the risk of slipping.
[0076] In some cases, the step 7 can also be designed with additional functions, such as storage space, handrails or lighting facilities. These functions can further enhance the practicality and usability of the device. When designing a device including the step 7, it is necessary to comprehensively consider the functional requirements of the main system 1, the safety and work efficiency of the operator, and the overall aesthetics and durability of the device. Through reasonable size and layout, material selection, fixing and installation, and consideration of additional functions, a practical and safe device environment can be created.
[0077] In summary, the technical solution provided by this application is that the dynamic integrated hydraulic actuator provides the test load, the steering knuckle constraint fixture and the steering knuckle loading fixture ensure the correct constraint and loading direction of the steering knuckle, and the main body system integrates the dynamic integrated hydraulic actuator, steering knuckle, steering knuckle constraint fixture, and steering knuckle loading fixture together, without the need for an external large oil supply system. The test device occupies a small space and has strong adaptability. The auxiliary fixture is used when adjusting the test loading direction, and the step is convenient for the test personnel to operate. The test device in this embodiment can ensure that the steering knuckle to be tested is installed in accordance with the requirements of the test standard and the load is applied to the steering knuckle at the same time, while ensuring the simplicity of the test operation.
[0078] The present application also provides a knuckle-steering arm integrated durability test method, which is applied to the knuckle-steering arm integrated durability test device shown in the device embodiment, and the method comprises: Step 1: assemble a steering knuckle constraint fixture, and connect the steering knuckle to be tested based on the steering knuckle constraint fixture.
[0079] The steering knuckle to be tested is selected as the test object, and its suspension form is a double wishbone structure. To facilitate data comparison, three strain gauges are pasted near the steering arm of the steering knuckle. The base of the steering knuckle constraint tooling is installed on the bottom plate by bolts, and the flange is installed on the base by bolts. The steering knuckle is installed on the flange by bolts.
[0080] Step 2: assemble the steering knuckle loading fixture, and connect the steering tie rod matching the steering knuckle to be tested based on the steering knuckle loading fixture.
[0081] Step 3, connecting the knuckle loading fixture and the dynamic integrated hydraulic actuator.
[0082] Connect one end of the connecting rod to the steering tie rod, and connect the other end of the connecting rod to the spherical bearing, and tighten them with a nut. Connect the U-shaped block to the output rod of the dynamic integrated hydraulic actuator. Insert the connected connecting rod and the spherical bearing into the center hole of the second mounting platform of the main body system, and connect the spherical bearing to the U-shaped block through a pin. Connect the steering tie rod and the connecting rod with a screw.
[0083] Step 4, assemble the auxiliary tooling, and adjust the direction of the steering knuckle loading tooling based on the auxiliary tooling so that the steering knuckle loading tooling and the upper end surface of the main body system are perpendicular.
[0084] Place the two right-angle blocks of the auxiliary tooling on the second mounting platform of the main system. Put the two right-angle blocks together to ensure that they can hold the outer circle of the connecting rod. Place the two switch-type magnetic seats on one side of each right-angle block. Adjust the position of each component to ensure a tight fit, open the magnetic switches of the two switch-type magnetic seats to fix them, and then the central axis of the steering knuckle loading tooling is perpendicular to the mounting plane of the second mounting platform.
[0085] Step 5, adjusting the stroke of the dynamic integrated hydraulic actuator and the position of the steering knuckle restraint fixture in the main body system so that the steering rod is connected to the steering knuckle to be tested.
[0086] Adjust the up and down stroke of the dynamic integrated hydraulic actuator and the position of the base plate on the second mounting platform to ensure that the steering tie rod can be accurately connected to the steering arm of the steering knuckle to be tested.
[0087] Step 6: Install the steering knuckle restraint tool on the upper end surface of the main body system, that is, tighten the connecting nut between the steering tie rod and the steering arm of the steering knuckle to be tested, and tighten the connecting bolts between the bottom plate and the second mounting platform.
[0088] Step 7, remove the auxiliary tooling.
[0089] Step 8, running the steering knuckle and steering arm integrated durability test device based on the steering arm durability test data of the steering knuckle to be tested.
[0090] The steering arm durability test data is obtained from the test standard of the steering knuckle to be tested, and the durability test data is one or more sinusoidal load sequences containing mean value, amplitude, and loading number information. The computer program is opened, a new test project is created, and the steering arm durability test data is input into the new test project to perform the steering arm durability test of the steering knuckle. During the loading process, the strain signal of the strain gauge attached to the steering knuckle is collected, and the strain amplitude is counted.
[0091] For ease of understanding, the present application embodiment provides a comparative test, in which the same steering knuckle as in the method embodiment is selected as the comparative proportion, and a strain gauge is pasted on the steering knuckle in the same position as in the method embodiment. The test bench is built in the manner of the relevant technology, and the same durability test data as in the method embodiment is applied. During the loading process, the strain signal of the strain gauge pasted on the steering knuckle is collected, and the strain amplitude is counted.
[0092] The same steering knuckle and durability test data were selected for the method embodiment and the comparative example to be comparable. The strain data measured in the method embodiment and the comparative example are put into Table 1 for comparison, and the result table is as follows: Table 1 Experimental Group Strain gauge 1 strain amplitude Strain gauge 2 strain amplitude Strain gauge 3 strain amplitude Method Embodiment 1035 872 1207 Comparative Example 1030 869 1193 It can be seen from the test results that, under the same steering knuckle and durability test data, the steering knuckle stress state of the steering knuckle conducted in the steering knuckle-steering arm durability test using the steering knuckle-steering arm integrated durability test device of the present application is highly consistent with the steering knuckle stress state measured by the test method in the relevant technology, and the steering knuckle-steering arm integrated durability test device of the present application can apply accurate load to the steering knuckle.
[0093] The present application also provides a computer-readable storage medium, in which at least one computer program is stored. The at least one computer program is loaded and executed by a processor so that the computer implements the steering knuckle and steering arm integrated durability test method as described in the above content.
[0094] Those skilled in the art will understand that Figure 1-Figure 7 The structure shown in the figure does not constitute a limitation on the structure of the present application, and may include more or less components than those shown in the figure, or combine certain components, or adopt a different component arrangement.
[0095] It should be understood that the "plurality" mentioned in this article refers to two or more. "And / or" describes the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.
[0096] The above are merely exemplary embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present application shall be included in the protection scope of the present application.
Claims
1. A knuckle and steering arm integrated durability test device, characterized in that: The device comprises: a main body system, a dynamic integrated hydraulic actuator, a steering knuckle restraint tooling, a steering knuckle loading tooling and an auxiliary tooling; The body system is used to support the dynamic integrated hydraulic actuator, the steering knuckle restraint tooling, the steering knuckle loading tooling and the auxiliary tooling; The dynamic integrated hydraulic actuator is vertically fixed inside the main body system and is used to connect the steering knuckle loading tooling to drive the steering knuckle loading tooling to apply a load to the steering knuckle to be tested; The steering knuckle restraint tool is located on the upper end surface of the main body system and is used to fix the steering knuckle to be tested; The steering knuckle loading tool is used to connect the steering tie rod matched with the steering knuckle to be tested, so as to apply the load to the steering knuckle to be tested through the steering tie rod; The auxiliary tooling is used to adjust the direction of the steering knuckle loading tooling so that the steering knuckle loading tooling and the upper end surface of the main body system are perpendicular.
2. The knuckle-steering arm integrated durability test device according to claim 1, characterized in that: The dynamic integrated hydraulic actuator includes: a force sensor, a displacement sensor, a power valve group, a heat dissipation component, an integrated oil cylinder-oil tank and a pre-pressure air filter; The force sensor is connected to the piston rod of the integrated oil cylinder-oil tank via a connecting ring, and is used to collect the load applied by the piston rod; The displacement sensor is located at the rear end of the integrated oil cylinder-oil tank; The power valve group is used to drive the piston rod of the integrated oil cylinder-oil tank; The heat dissipation components are located on both sides of the integrated oil cylinder-oil tank, and are used to reduce the heat of the integrated oil cylinder-oil tank; The integrated oil cylinder-oil tank is used to drive the steering knuckle loading tooling; The pre-pressure air filter is used to protect the integrated oil cylinder-oil tank.
3. The knuckle-steering arm integrated durability test device according to claim 2, characterized in that: The rated load of the dynamic integrated hydraulic actuator is ±100 kN, and the working stroke of the dynamic integrated hydraulic actuator is 200 mm.
4. The knuckle-steering arm integrated durability test device according to claim 1, characterized in that: The body system includes a first mounting platform, a second mounting platform, a first support column, a second support column, a first baffle plate, and a second baffle plate; The first pillar is fixed on the ground, and the first pillar is used to support the first installation platform; The second pillar is fixed on the first mounting platform, and the second pillar is used to support the second mounting platform; the second mounting platform includes a center hole, and the center hole is used for the steering knuckle loading tool to pass through; The first baffle is located on the outside of the first pillar and is used to protect the components inside the body system; The second baffle is located on the outer side of the second pillar and is used to protect the component.
5. The knuckle-steering arm integrated durability test device according to claim 4, characterized in that: The upper surface of the second mounting platform includes T-shaped grooves in longitudinal and transverse directions for mounting the steering knuckle restraint tooling, the steering knuckle loading tooling and the auxiliary tooling.
6. The knuckle-steering arm integrated durability test device according to claim 5, characterized in that: The number of the first pillars is four, and the number of the second pillars is four; The four first pillars are arranged in a rectangular shape, and the second pillars are arranged in a rectangular shape; At least one first baffle between two adjacent first pillars comprises a first window for maintenance of the assembly; and at least one second baffle between two adjacent second pillars comprises a second window for maintenance of the assembly.
7. The knuckle-steering arm integrated durability test device according to claim 6, characterized in that: The material of the second baffle is transparent and is used to display the stroke of the dynamic integrated hydraulic actuator.
8. The knuckle-steering arm integrated durability test device according to any one of claims 4 to 7, characterized in that: The steering knuckle restraint tooling comprises: a bottom plate, a base and a flange; The bottom plate is fixed on the second mounting platform and is used to support the base and the flange; The base is used to connect the bottom plate and the flange; The flange is used to fix the steering knuckle to be tested, and the specifications of the bolt holes of the flange match those of the steering knuckle to be tested.
9. The knuckle-steering arm integrated durability test device according to any one of claims 4 to 7, characterized in that: The steering knuckle loading tooling comprises a U-shaped block, a spherical bearing and a connecting rod; The U-shaped block is used to be connected to the piston rod of the dynamic integrated hydraulic actuator, and the upper part of the U-shaped block is connected to the spherical bearing; the spherical bearing is connected to the connecting rod; the connecting rod is used to connect the steering rod.
10. The knuckle and steering arm integrated durability testing device according to claim 9, characterized in that: The auxiliary tooling includes: two right-angle blocks and two switch-type magnetic seats; The two right-angle blocks are spliced together to form a hollow cylinder, and the diameter of the hollow cylinder matches the diameter of the connecting rod; The two switch-type magnetic seats are used to fix the two right-angle blocks on the second mounting platform respectively.
11. The knuckle and steering arm integrated durability testing device according to claim 1, characterized in that: The device also includes a step step surrounding the body system.
12. A knuckle and steering arm integrated durability test method, characterized in that: The method is applied to a steering knuckle and steering arm integrated durability test device, the device comprising a main body system, a dynamic integrated hydraulic actuator, a steering knuckle restraint tooling, a steering knuckle loading tooling and an auxiliary tooling; the method comprises: Assembling a steering knuckle restraint tool, and connecting a steering knuckle to be tested based on the steering knuckle restraint tool; Assembling the steering knuckle loading tool, and connecting the steering tie rod matching the steering knuckle to be tested based on the steering knuckle loading tool; Connecting the knuckle loading tooling and the dynamic integrated hydraulic actuator; Assembling the auxiliary tooling, and adjusting the direction of the steering knuckle loading tooling based on the auxiliary tooling so that the steering knuckle loading tooling and the upper end surface of the main body system are perpendicular; Adjusting the stroke of the dynamic integrated hydraulic actuator and the position of the steering knuckle restraint tooling on the body system so that the steering tie rod is connected to the steering knuckle to be tested; Install the steering knuckle restraint tool on the upper end surface of the main body system; Removing the auxiliary tooling; The steering knuckle and steering arm integrated durability test device is operated based on the steering arm durability test data of the steering knuckle to be tested.
13. A computer-readable storage medium, characterized in that: At least one computer program is stored in the computer-readable storage medium, and the at least one computer program is loaded and executed by the processor so that the computer implements the steering knuckle and steering arm integrated durability test method as claimed in claim 12.