Durable test fixture and method for rear suspensions
By using a multi-module design of a frame-like durability testing fixture, the problem of the overall integrity of the suspension system was not considered, which enabled accurate simulation of suspension durability performance and reliable data, and reduced R&D risks and costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHERY AUTOMOBILE CO LTD
- Filing Date
- 2025-11-12
- Publication Date
- 2026-08-04
AI Technical Summary
Existing suspension durability testing fixtures fail to fully consider the overall integrity of the rear suspension system during the design phase, resulting in significant discrepancies between test results and actual vehicle durability test results, thus failing to accurately guide the optimized design of the suspension system.
Design a frame-shaped durability testing fixture that includes multiple installation modules, such as dedicated installation modules for the rear subframe assembly, rear upper control arm, shock absorber, and springs. By applying loads at multiple points, the fixture can restore the actual connection relationship and accurately simulate the stress state of the entire vehicle.
It narrowed the gap between bench test and vehicle test results, improved the accuracy of suspension durability performance verification, reduced R&D risks and rectification costs, and provided reliable test data support.
Smart Images
Figure CN121298289B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of automotive technology, specifically relating to a durability testing fixture and method for rear suspension. Background Technology
[0002] As the automotive industry shifts from technology import to independent development, vehicle strength and fatigue durability have become core indicators for measuring design quality, directly impacting driving safety and user experience. As a key component transmitting forces between the vehicle body and the road surface, the accurate verification of the suspension system's durability is particularly important. Bench testing, due to its ability to simulate specific operating conditions and shorten testing cycles, has become the primary means of evaluating suspension durability. The design rationality of the testing fixture, serving as the connecting carrier between the bench and suspension components, directly determines the reliability of the test results.
[0003] like Figure 7 As shown, the rear suspension includes a rear subframe assembly 12', a stabilizer bar assembly 21', a rear upper control arm assembly 13', a shock absorber assembly 14', a steering knuckle 15', a rear lower control arm assembly 16', a spring arm assembly 14', a lower spring pad 18', a spring 19', and an upper spring pad 20'. Current traditional suspension durability testing fixtures have significant design flaws. For example, in the bench fixture design stage, a single-point loading method is commonly used on the subframe or control arm, without considering the overall integrity of the vehicle chassis's rear suspension system and ignoring the actual connection relationship between other key components such as shock absorbers and stabilizer bars and the subframe (or control arm). This simplified design leads to a significant difference between the stress state of suspension components during testing and the actual stress state under the vehicle assembly environment. It cannot fully simulate the collaborative stress mechanism of the suspension system during vehicle operation, resulting in a large deviation between the durability data obtained from bench tests and the actual durability test results of the whole vehicle, making it difficult to accurately guide the optimized design of the suspension system.
[0004] The aforementioned issues have severely impacted the effectiveness of rear suspension durability testing, potentially leading companies to make design decisions based on inaccurate test data, increasing product development risks and subsequent rectification costs. Therefore, it is necessary to develop a testing fixture capable of reproducing the complete connection relationship of the rear suspension system and accurately simulating actual stress states. This would reduce the discrepancy between bench tests and vehicle tests, improve the accuracy of suspension durability performance verification, and provide reliable technical support for the forward development of automotive chassis. Summary of the Invention
[0005] To address some or all of the aforementioned technical problems in the prior art, this invention proposes a durability testing fixture and method for rear suspension. This durability testing fixture for rear suspension can completely install all rear suspension assemblies through multiple modules, replicating the actual connection relationships, avoiding the defects of traditional single-point loading, making the test stress more realistic, and reducing the difference between the results and those from whole-vehicle tests.
[0006] According to a first aspect of the present invention, a durability testing fixture for a rear suspension is provided, comprising: The tooling body is frame-shaped. The rear subframe assembly mounting module is mounted on the tooling body and is used to mount the rear subframe assembly of the rear suspension. The rear upper control arm mounting module is mounted on the tooling body and is used to mount the rear upper control arm assembly of the rear suspension. The shock absorber mounting module is mounted on the tooling body and is used to mount the shock absorber assembly of the rear suspension. A spring mounting module is disposed on the tooling body, the spring mounting module being used to mount the rear suspension spring. A loading module, which is used to be mounted on the steering knuckle of the rear suspension.
[0007] In one embodiment, the rear subframe assembly mounting module includes a bending plate, one side of which is fixed to the tooling body, the other side of which is used to support and connect the rear subframe assembly of the rear suspension, and a first connecting hole for bolts to pass through is provided on the other side of the bending plate.
[0008] In one embodiment, the rear upper control arm mounting module includes a connecting rod and a grooved component. The connecting rod is used to connect to the tooling body, and the grooved component is fixed to the connecting rod with its opening facing downward. A second connecting hole is provided on the grooved sidewall of the grooved component.
[0009] In one embodiment, the vibration damper mounting module includes a connecting plate and a connecting edge disposed on the connecting plate, the connecting plate being used to connect to the tooling body, and a third connecting hole being disposed on the connecting edge.
[0010] In one embodiment, the spring mounting module includes a connecting post, an abutment plate disposed on the connecting post, and a protruding post disposed on the abutment plate and extending away from the connecting post.
[0011] In one embodiment, the loading module includes three modules selectively mounted on the steering knuckle of the rear suspension, namely a longitudinal force loading module, a vertical force loading module, and a lateral force loading module.
[0012] In one embodiment, the longitudinal force loading module includes a longitudinal force mounting plate for mounting to a steering knuckle of the rear suspension, and a longitudinal force loading member fixed to the longitudinal force mounting plate; the vertical force loading module includes a vertical force mounting plate for mounting to a steering knuckle of the rear suspension, and a vertical loading member fixed to the vertical force mounting plate; the lateral force loading module includes a lateral force mounting plate for mounting to a steering knuckle of the rear suspension, and a downwardly extending strip-shaped extension plate fixed to the lateral force mounting plate.
[0013] In one embodiment, the tooling body is further provided with reinforcing columns on its outer side, and there are multiple reinforcing columns.
[0014] According to a second aspect of the present invention, a durability testing method for a rear suspension is provided, utilizing the aforementioned durability testing fixture for a rear suspension, comprising: Step 1: Connect the rear subframe assembly of the rear suspension to the rear subframe assembly mounting module, and connect the stabilizer bar of the rear suspension to the rear subframe assembly. Step two, connect the rear upper control arm assembly of the rear suspension to the rear upper control arm mounting module. Step 3: Connect the rear lower control arm assembly of the rear suspension to the rear subframe assembly of the rear suspension. Step four: Install the rear suspension shock absorber assembly to the shock absorber mounting module, and then connect it to the rear lower control arm assembly of the rear suspension. Step 5: Connect the rear suspension spring arm assembly to the rear suspension subframe assembly, and then connect the rear suspension spring to the spring mounting module and the spring arm assembly. Step six: Connect the steering knuckle of the rear suspension to the upper rear control arm assembly, lower rear control arm assembly, and spring arm assembly of the rear suspension. Step 7: Install the loading module onto the steering knuckle. Step 8: Apply force to the loading module to initiate the durability test.
[0015] In one embodiment, in step seven, depending on the experimental requirements, one of the loading modules is selected and installed on the steering knuckle; in step eight, a corresponding longitudinal force, vertical force, or lateral force is applied to the loading module.
[0016] Compared with existing technologies, the advantages of this invention are as follows: The frame-like tooling body provides stable support for each mounting module. Simultaneously, the setup of multiple mounting modules, including the rear subframe assembly mounting module, rear upper control arm mounting module, shock absorber mounting module, and spring mounting module, can completely replicate the actual assembly structure of the rear suspension system. This overcomes the limitations of traditional tooling that only applies single-point loading to a single component, achieving overall installation and fixation of key rear suspension assemblies and ensuring a high degree of consistency between the test conditions and the vehicle assembly environment. Furthermore, by precisely connecting each mounting module to its corresponding suspension component, the collaborative force relationship between the various rear suspension assemblies during vehicle operation can be completely reproduced, avoiding force path deviations caused by missing components. This allows the force applied to the steering knuckle by the loading module to be more realistically transmitted to the entire suspension system, accurately simulating the force state under actual working conditions. Moreover, this design significantly reduces the difference between bench tests and vehicle durability tests, allowing test data to better reflect the true durability performance of the suspension, providing a more reliable basis for suspension system optimization design, reducing R&D risks and rectification costs, and significantly improving test effectiveness and R&D efficiency. Attached Figure Description
[0017] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, in which: Figure 1a A perspective view of a durability testing fixture for a rear suspension according to an embodiment of the present invention is shown; Figure 1b A top view of a durability testing fixture for a rear suspension according to an embodiment of the present invention is shown; Figure 1c A side view of a durability testing fixture for a rear suspension according to an embodiment of the present invention is shown; Figure 2 An application diagram of a durability testing fixture for a rear suspension according to an embodiment of the present invention is shown; Figure 3a The rear upper control arm mounting module of a durability testing fixture for a rear suspension according to an embodiment of the present invention is shown. Figure 3b An application diagram of the rear upper control arm mounting module of a durability testing fixture for a rear suspension according to an embodiment of the present invention is shown. Figure 4a A damper mounting module for a durability testing fixture for a rear suspension, according to an embodiment of the present invention, is shown. Figure 4b An application diagram of a shock absorber mounting module for a durability testing fixture for a rear suspension according to an embodiment of the present invention is shown. Figure 5a A spring mounting module for a durability testing fixture for a rear suspension according to an embodiment of the present invention is shown; Figure 5b An application diagram of a spring mounting module for a durability testing fixture for a rear suspension according to an embodiment of the present invention is shown; Figure 6a One of the loading modules of a durability testing fixture for a rear suspension according to an embodiment of the present invention is shown; Figure 6b One of the loading modules of a durability testing fixture for a rear suspension according to an embodiment of the present invention is shown; Figure 6c One of the loading modules of a durability testing fixture for a rear suspension according to an embodiment of the present invention is shown; Figure 7 The rear suspension, based on existing technology, is shown.
[0018] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale. Detailed Implementation
[0019] To make the technical solutions and advantages of the present invention clearer, exemplary embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not an exhaustive list of all embodiments. Furthermore, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.
[0020] In the description of this invention, the terms "first," "second," etc., used in the specification, claims, and accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in sequences other than those illustrated or described herein.
[0021] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. This application will now be described in detail with reference to the accompanying drawings and embodiments.
[0022] Embodiments of the present invention provide a durability testing fixture for rear suspension. For example... Figures 1a to 6cAs shown, the durability testing fixture for the rear suspension includes a fixture body 1, a rear subframe assembly mounting module 2, a rear upper control arm mounting module 3, a shock absorber mounting module 4, a spring mounting module 5, and a loading module 6. The fixture body 1 has a frame-like structure, serving as the core load-bearing foundation to ensure the overall structural stability of the durability testing fixture for the rear suspension and providing a stable mounting reference for each mounting module. The rear subframe assembly mounting module 2 is mounted on the fixture body 1 and is used to mount the rear subframe assembly 12' of the rear suspension. The rear upper control arm mounting module 3 is mounted on the fixture body 1 and is used to mount the rear upper control arm assembly 13' of the rear suspension. The shock absorber mounting module 4 is mounted on the fixture body 1 and is used to mount the shock absorber assembly 14' of the rear suspension. The spring mounting module 5 is mounted on the fixture body 1 and is used to mount the spring 19' of the rear suspension. The loading module 6 is used to be installed on the steering knuckle 15' of the rear suspension to facilitate the loading of forces on the rear suspension, thereby simulating the actual force on the rear suspension.
[0023] As can be seen, the frame-like fixture body 1 not only ensures the overall structural stability but also provides a stable and unified installation benchmark for each installation module, laying the foundation for the accuracy of the test. The durability test fixture for the rear suspension helps to fully reproduce the actual connection relationship of the rear suspension system. Through dedicated installation modules for the rear subframe assembly, rear upper control arm, shock absorber, spring, etc., each core component of the rear suspension is installed accordingly, breaking the design limitations of traditional fixtures with single-point loading and fully considering the integrity of the rear suspension system. This design can accurately simulate the collaborative connection state of each component under the vehicle assembly environment, making the stress state of the rear suspension components during the test highly consistent with the actual stress situation when the vehicle is driving, effectively reproducing the collaborative stress mechanism of the rear suspension system. At the same time, the loading module is directly set on the rear suspension steering knuckle, and the force loading method is more in line with actual working conditions, further improving the realism of the stress simulation. Therefore, this durability testing fixture for rear suspension can not only significantly reduce the deviation between bench tests and actual vehicle durability tests, and significantly improve the accuracy of suspension durability performance verification, providing reliable test data support for enterprises, but also help reduce product development risks and subsequent rectification costs, providing strong technical support for the forward development of automotive chassis, and promoting more targeted and effective suspension system optimization design.
[0024] In one embodiment, such as Figure 1a , 1bAs shown in Figures 1c and 2, the rear subframe assembly mounting module 2 includes bent plates. One side 21 of the bent plate is fixed to the tooling body 1, and the other side 22 of the bent plate is used to support and connect the rear subframe assembly 12' of the rear suspension. A first connecting hole 24 for the first bolt 23 to pass through is provided on the other side 22 of the bent plate. There are four bent plates, distributed on the four corner beams of the tooling body 1. During installation, the four connecting parts of the rear subframe assembly 12' of the rear suspension overlap and sit on the other side 22 of the four corresponding bent plates, and then the rear subframe assembly 12' of the rear suspension is connected to the tooling body 1 by passing the first bolt 23 through the second connecting hole 24 and the rear subframe assembly 12'. The bent plate structure is simple in design, serving both fixing and load-bearing functions. One side 21 of the bent plate is reliably connected to the fixture body 1, while the other side 22 of the bent plate, through the first connecting hole 24 and the first bolt 23, forms a rigid connection structure, ensuring installation strength. Four bent plates are distributed at the four corners of the fixture body 1, precisely corresponding to the four connecting parts of the rear subframe assembly 12', ensuring accurate positioning and even stress distribution when the rear subframe assembly 12' is overlapped and seated. This design not only replicates the installation posture and connection relationship of the rear subframe assembly 12' in the vehicle but also ensures assembly stability through bolt tightening, preventing displacement or stress shift during testing. This provides a reliable foundation for the accuracy of the overall stress simulation of the rear suspension and further enhances the credibility of the durability test data.
[0025] like Figure 2 , 3aAs shown in Figure 3b, the rear upper control arm mounting module 3 includes a connecting rod 31 and a slotted component 32. The connecting rod 31 is used to connect to the tooling body 1. The slotted component 32 is fixed to the connecting rod 31 with its opening facing downwards. A second connecting hole 33 is provided on the slotted sidewall of the slotted component 32. There are two slotted components 32, which are spaced apart and used to correspond to the two mounting parts of the rear upper control arm assembly 13'. During installation, the two slotted components 32 are snapped into the two mounting parts of the corresponding rear upper control arm assembly 13', and then the second bolt 34 is used to pass through the second connecting hole 33 and the rear upper control arm assembly 13' to fix the rear upper control arm mounting module 3 to the rear upper control arm assembly 13'. Through the combined design of the connecting rod 31 and the slotted component 32, the rear upper control arm mounting module 3 achieves precise positioning and stable connection of the rear upper control arm assembly 13'. The connecting rod 31 provides a reliable connection base for the module to the tooling body 1. Two spaced-apart slotted pieces 32, with their openings facing downwards, can precisely engage with the two mounting parts of the rear upper control arm assembly 13', forming a pre-positioning structure to ensure the installation posture conforms to the actual assembly state. The second connecting hole 33 on the sidewall of the slotted piece 32, in conjunction with the second bolt 34, further rigidly fixes the module to the rear upper control arm assembly 13', preventing relative displacement during testing. This design not only replicates the connection relationship of the rear upper control arm assembly 13' in the vehicle but also ensures the accuracy of force transmission through the dual limiting of engagement and bolt tightening, providing reliable support for the simulation of rear suspension coordinated force and improving the realism of the test data.
[0026] like Figure 2 , 4a As shown in 4b, the shock absorber mounting module 4 includes a connecting plate 41 and a connecting edge 42 disposed on the connecting plate 41. The connecting plate 41 is used to connect to the tooling body 1. A third connecting hole 43 is provided on the connecting edge 42. The connecting plate 41 and the connecting edge 42 can be integrally constructed, with a general "U" shape. The shock absorber mounting module 4 adopts an integral "U"-shaped connecting plate 41 and connecting edge 42 structure, which is simple in design and has sufficient rigidity. The connecting plate 41 is firmly connected to the tooling body 1, and the connecting edge 42 abuts against the shock absorber assembly 14'. The third connecting hole 43 can be precisely aligned with the connecting hole on the shock absorber assembly 14'. By using a third bolt 44 passing through the third connecting hole 43 and the shock absorber assembly 14', the shock absorber mounting module 4 and the shock absorber assembly 14' are fixed, and positioning and installation are quickly achieved. Its integral structure reduces assembly errors, ensures that the installation posture of the shock absorber is consistent with the whole vehicle, helps to accurately transmit force, and improves the reliability of the test. Additionally, the connecting plate 41 can be connected to the tooling body 1, for example, by bolts. There can be multiple damper mounting modules 4, and the connecting plates 41 of these damper mounting modules 4 have different heights, which are used to selectively install them onto the tooling body 1, thereby adjusting the axial pressure on the damper assembly 14', thereby simulating working conditions such as half load, no load, and full load to meet different needs.
[0027] like Figure 2 , 5a As shown in Figure 5b, the spring mounting module 5 includes a connecting post 51, an abutment plate 52, and a protruding post 53. The connecting post 51 is fixed to the working body 1. The abutment plate 52 is located on the end of the connecting post 51 facing away from the working body 1. After installation, the abutment plate 52 abuts against the axial end face of the spring 19'. The protruding post 53 is located on the abutment plate 52 and extends away from the connecting post 51. After installation, the connecting post 51 extends into the inner cavity of the spring 19'. It can be seen that the connecting post 51 of the spring mounting module 5 is firmly fixed to the tooling body 1, the abutment plate 52 can accurately abut against the axial end face of the spring 19', and the protruding post 53 extends into the inner cavity of the spring 19', forming a radial limit. The cooperation of these three components ensures that the spring mounting posture is consistent with the vehicle body and prevents spring displacement during testing through dual positioning. The structure is simple yet reliably transmits axial force, improving test stability. The connecting post 51 can be detachably connected to the tooling body 1 using bolts or other means. It can have multiple spring mounting modules 5, which have different axial lengths connecting the column 51, so that the appropriate spring mounting module 5 can be selected and installed on the tooling body 1 according to different loading needs such as full load, no load and half load.
[0028] The loading module 6 includes three modules, namely the longitudinal force loading module 61 (e.g., ...). Figure 6a (as shown), vertical force loading module 62 (as shown) Figure 6b (as shown) and lateral force loading module 63 (as shown) Figure 6a (As shown).
[0029] Specifically, the longitudinal force loading module 61 includes a longitudinal force mounting plate 611 for mounting to the steering knuckle 15' of the rear suspension. A longitudinal force loading element is provided on the longitudinal force mounting plate 611 for connecting, for example, a cylinder or hydraulic cylinder, to apply longitudinal force to the longitudinal force loading module 61. For example, the longitudinal force mounting plate 611 is provided with a longitudinal force plate connection hole 612 for detachably connecting the longitudinal force loading module 61 to the bogie 15' using bolts. The longitudinal force loading element includes two opposing first connecting plates 613 and a first connecting post 614 connecting the two first connecting plates 613. The first connecting plates 613 are fixed to the longitudinal force mounting plate 611. When testing is required, after the longitudinal force loading module 61 is installed in place, the first connecting post 614 extends axially in the vertical direction. After connection, the cylinder or hydraulic cylinder is fixed to the longitudinal force loading component. For example, a ring-shaped component is fixed to the extension rod of the cylinder or hydraulic cylinder, and the ring-shaped component is sleeved onto the first connecting post 614. The longitudinal force loading component with the above structure can easily connect the cylinder or hydraulic cylinder. It should be noted that the longitudinal force here is used to simulate the X-direction force of a car.
[0030] The vertical force loading module 62 includes a vertical force mounting plate 621 for mounting to the steering knuckle 15' of the rear suspension and a vertical loading member fixed to the vertical force mounting plate 621. A vertical force plate connection hole 622 is provided on the vertical force mounting plate 621 for bolt components to pass through, thereby facilitating the connection or removal of the vertical force loading module 62 to or from the steering knuckle 15'. The vertical force loading member includes two opposing second connecting plates 623 and a second connecting post 624 connecting the two second connecting plates 623. The second connecting plates 623 are fixed to the vertical force mounting plate 621. After connection, a cylinder or hydraulic cylinder is fixed to the second connecting post 624; for example, the extension rod of the cylinder or hydraulic cylinder is fixed to an annular member, which is fitted onto the outer wall of the second connecting post 624; the axial direction of the second connecting post 624 extends longitudinally. It should be noted that the vertical force here is used to simulate the Z-axis force of the vehicle.
[0031] The lateral force loading module 63 includes a lateral force mounting plate 631 for mounting to the steering knuckle 15' of the rear suspension. The lateral force mounting plate 631 has lateral force plate mounting holes 632 for conveniently fixing the lateral force mounting plate 631 to the tooling body 1 with bolts. A strip-shaped extension plate 633 is fixed to the lateral force mounting plate 631. After installation, the strip-shaped extension plate 633 extends downwards. The strip-shaped extension plate 633 has loading holes 634 for connecting a loading device such as a cylinder or hydraulic cylinder. For example, the extension rod of the cylinder or hydraulic cylinder has a stepped surface, with its free end inserted into the loading hole 634 and the stepped surface abutting against the strip-shaped extension plate 633. It should be noted that the lateral force here is used to simulate the Y-direction force at the vehicle's contact point.
[0032] Additionally, it should be noted that the longitudinal force loading component, vertical loading component, and loading hole 634 are all designed to connect to external loading devices. If the structure of the external loading device changes, the corresponding longitudinal force loading component, vertical loading component, and loading hole 634 can also change.
[0033] like Figure 1a , 1b As shown in Figure 1c, the main body of the fixture 1 is a cubic frame structure assembled from multiple beams. This setup has high overall rigidity and stability, providing a unified and stable reference for each installation module, ensuring accurate force transmission during testing, and improving the reliability of the fixture.
[0034] like Figure 1a , 1bAs shown in 1c, the durability testing fixture for the rear suspension also includes reinforcing columns 7. There are multiple reinforcing columns 7, for example, four. Two of the four reinforcing columns 7 form a group, and the two reinforcing columns 7 in a group are connected by a crossbeam 8 to form a portal structure. Each reinforcing column 7 and the crossbeam 8 is fixedly connected to the fixture body 1 via connectors 9. The beam at the top of the fixture body 1 is square, and the sequentially connected sides are labeled as first side 11, second side 12, third side 13, and fourth side 14. One reinforcing column 7 of a portal structure is located outside the first side 11, while the other reinforcing column 7 is located outside the second side 12. Similarly, one reinforcing column 7 of a portal structure is located outside the first side 11, while the other reinforcing column 7 is located outside the fourth side 14. It can be seen that in... Figure 1b In the design, two portal-shaped crossbeams 8 extend in a roughly V-shape. Multiple reinforcing columns 7, in conjunction with the crossbeams 8 and connectors 9, form a stable and reinforced structure for the main fixture body 1. The four reinforcing columns 7 are divided into two groups, each group forming a portal-shaped structure via the crossbeams 8, and then fixed to the main fixture body 1 via connectors 9. Their installation positions are aligned with the outer sides of the first side 11, second side 12, and fourth side 14 of the top square beam, causing the two groups of portal-shaped crossbeams 8 to extend in a V-shape. This design significantly improves the overall rigidity and deformation resistance of the main fixture body 1, especially strengthening the load-bearing capacity of the critical stress-bearing area at the top. It effectively resists lateral forces and torques generated during test loading, preventing displacement or deformation of the fixture. This provides dual assurance for the positioning accuracy and force transmission accuracy of each installation module, further enhancing the reliability of the test data.
[0035] This application also relates to a durability testing method for a rear suspension. This testing method utilizes the aforementioned durability testing fixture for a rear suspension. The durability testing method for a rear suspension is described in detail below with reference to all the figures in this application.
[0036] First, a pre-connection is performed, which involves setting the durability testing fixture for the rear suspension onto the test bench in preparation for the durability testing method for the rear suspension.
[0037] Next, proceed to step one, connecting the rear subframe assembly 12' of the rear suspension to the rear subframe assembly mounting module 2. Then, connect the stabilizer bar 21' of the rear suspension to the rear subframe assembly 12'.
[0038] Next, proceed to step two, connecting the rear upper control arm assembly 13' of the rear suspension to the rear upper control arm mounting module 3.
[0039] Next, proceed to step three, connecting the rear lower control arm assembly 16' of the rear suspension to the rear subframe assembly 12' of the rear suspension.
[0040] Next, proceed to step four, connecting the rear suspension shock absorber assembly 14' to the shock absorber mounting module 4, and then to the rear lower control arm assembly 16' of the rear suspension. Step five involves connecting the rear suspension spring arm assembly 14' to the rear subframe assembly 12'. Then, the lower spring pad 18' is attached to the spring arm assembly 14'. The upper spring pad 20' is then installed onto the abutment plate 52 of the spring mounting module 5. Finally, the rear suspension spring 19' is connected to both the spring mounting module 5 and the spring arm assembly 14'.
[0041] Next, proceed to step six, connecting the steering knuckle 15' of the rear suspension to the rear upper control arm assembly 12', the rear lower control arm assembly 13', and the spring arm assembly 14' of the rear suspension.
[0042] Next, proceed to step seven to install the loading module onto the steering knuckle 15'.
[0043] Finally, proceed to step eight, apply force to loading module 6, and initiate the durability test.
[0044] In step eight, depending on the experimental requirements, one loading module is selected and installed onto the steering knuckle 15' to apply the corresponding longitudinal, vertical, or lateral force. For example, to conduct a longitudinal force test, the longitudinal force loading module 61 is installed onto the steering knuckle 15'. A longitudinal force is then applied to the longitudinal force loading module 61 for the test, with the loading point simulating the wheel center point. For example, to conduct a vertical force test, the other loading modules 6 are removed from the steering knuckle 15'. The vertical force loading module 62 is installed onto the steering knuckle 15'. A vertical force is then applied to the vertical force loading module 62 for the test, with the loading point simulating the wheel center point. For example, to conduct a lateral force test, the other loading modules 6 are removed from the steering knuckle 15'. The lateral force loading module 63 is installed onto the steering knuckle 15'. A lateral force is then applied to the strip extension plate 633 for the test, with the loading point simulating the tire contact point.
[0045] During the experiment, the damper mounting module 4 was replaced to achieve durability tests under different loads, meeting the requirements of no-load, half-load, and full-load tests. Similarly, the spring mounting module 5 was replaced to achieve durability tests under different loads, meeting the requirements of no-load, half-load, and full-load tests. For example, by adjusting the thickness of the connecting plate 41, the distance between the damper assembly 14' and the fixture body 1 can be adjusted, thus adjusting the unloaded state of the damper assembly 14'. Similarly, by setting the length of the connecting column 51, the compression state of the spring 19' can be adjusted. This design eliminates the need to replace the entire fixture set, adapts to different test conditions, reduces test costs, improves test efficiency, and ensures the accuracy of force simulation under different loads, providing flexible support for the multi-condition durability performance verification of the suspension.
[0046] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and / or modifications falling within the scope of the invention, and all changes and / or modifications made according to embodiments of the invention should be covered within the protection scope of the invention.
Claims
1. A durability test tool for a rear suspension, characterized by, include: The tooling body is frame-shaped. The rear subframe assembly mounting module is mounted on the tooling body and is used to mount the rear subframe assembly of the rear suspension. The rear upper control arm mounting module is mounted on the tooling body and is used to mount the rear upper control arm assembly of the rear suspension. The shock absorber mounting module is mounted on the tooling body and is used to mount the shock absorber assembly of the rear suspension. A spring mounting module is disposed on the tooling body, the spring mounting module being used to mount the rear suspension spring. A loading module, which is used to mount onto the steering knuckle of the rear suspension. The rear subframe assembly mounting module includes a bending plate, one side of which is fixed to the tooling body, and the other side of which is used to support and connect the rear subframe assembly of the rear suspension. A first connecting hole for bolts to pass through is provided on the other side of the bending plate. The rear upper control arm mounting module includes a connecting rod and a grooved component. The connecting rod is used to connect to the tooling body, and the grooved component is fixed to the connecting rod with its opening facing downward. A second connecting hole is provided on the grooved sidewall of the grooved component.
2. The durability test tool for a rear suspension according to claim 1, characterized by, The vibration damper mounting module includes a connecting plate and a connecting edge disposed on the connecting plate. The connecting plate is used to connect to the tooling body, and a third connecting hole is provided on the connecting edge.
3. The durability test tool for a rear suspension according to claim 1, characterized by, The spring mounting module includes a connecting post, an abutment plate disposed on the connecting post, and a protruding post disposed on the abutment plate and extending away from the connecting post.
4. The durability testing fixture for a rear suspension according to any one of claims 1 to 3, characterized in that, The loading module includes three modules that are selectively installed on the steering knuckle of the rear suspension, namely a longitudinal force loading module, a vertical force loading module, and a lateral force loading module.
5. The durability testing fixture for rear suspension according to claim 4, characterized in that, The longitudinal force loading module includes a longitudinal force mounting plate for mounting on the steering knuckle of the rear suspension, and a longitudinal force loading member fixed to the longitudinal force mounting plate; the vertical force loading module includes a vertical force mounting plate for mounting on the steering knuckle of the rear suspension, and a vertical loading member fixed to the vertical force mounting plate. The lateral force loading module includes a lateral force mounting plate for mounting to the steering knuckle of the rear suspension, and a downwardly extending strip plate fixed to the lateral force mounting plate.
6. The durability testing fixture for a rear suspension according to any one of claims 1 to 3, characterized in that, It also includes reinforcing columns disposed on the outside of the tooling body, wherein there are multiple reinforcing columns.
7. A durability testing method for a rear suspension, utilizing the durability testing fixture for a rear suspension according to any one of claims 1 to 6, characterized in that, include: Step 1: Connect the rear subframe assembly of the rear suspension to the rear subframe assembly mounting module, and connect the stabilizer bar of the rear suspension to the rear subframe assembly. Step two, connect the rear upper control arm assembly of the rear suspension to the rear upper control arm mounting module. Step 3: Connect the rear lower control arm assembly of the rear suspension to the rear subframe assembly of the rear suspension. Step four: Install the rear suspension shock absorber assembly to the shock absorber mounting module, and then connect it to the rear lower control arm assembly of the rear suspension. Step 5: Connect the rear suspension spring arm assembly to the rear suspension subframe assembly, and then connect the rear suspension spring to the spring mounting module and the spring arm assembly. Step six: Connect the steering knuckle of the rear suspension to the upper rear control arm assembly, lower rear control arm assembly, and spring arm assembly of the rear suspension. Step 7: Install the loading module onto the steering knuckle. Step 8: Apply force to the loading module to initiate the durability test.
8. The durability testing method for a rear suspension according to claim 7, characterized in that, In step seven, depending on the experimental requirements, one of the loading modules is selected and installed on the steering knuckle. In step eight, a corresponding longitudinal force, vertical force, or lateral force is applied to the loading module.