A kind of automobile suspension control arm monomer test tool
By designing a single-unit test fixture for automotive suspension control arms with X, Y, and Z-axis loading, the problem of inaccurate simulation of durability performance in existing technologies has been solved, achieving accurate simulation of control arm durability performance and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN JIANAN IND
- Filing Date
- 2025-05-29
- Publication Date
- 2026-07-24
Smart Images
Figure CN224552720U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of control arm testing, specifically to a single testing fixture for automotive suspension control arms. Background Technology
[0002] The control arm is an important component of the vehicle's suspension system. It includes a large bushing, a small bushing that connects to the frame, and a ball joint that connects to the steering knuckle, and is used for guidance and force transmission. In existing technologies, for durability tests of individual automotive suspension control arms, such as the invention patent "MacPherson Suspension Front Control Arm Assembly Durability Test System and Method" with publication number CN 119086109 A, a control arm durability test fixture is proposed. This fixture simulates the load that the MacPherson suspension control arm needs to bear in a real vehicle by applying X and Y axial forces. However, it only involves X and Y axial loading and does not include Z axial loading. The durability test of the control arm lacks vertical impact (such as going over a pothole), which will lead to errors in the final results. Moreover, it designs a multi-stage linkage structure of rotating tube, bushing fixing seat and constraint rod, which requires frequent calibration of the coaxiality of the swing angle axis and the force loading axis. If the calibration is incorrect, it will also lead to a large error in the final results. Furthermore, the input signal of this fixture requires multiple rounds of iteration, that is, it needs to first collect the real vehicle road spectrum, process the time domain signal, and iteratively optimize the actuator output. The algorithm is complex and costly. Summary of the Invention
[0003] To address the aforementioned problems, this invention provides a single-unit testing fixture for automotive suspension control arms. By simultaneously applying three-dimensional coupled loading to the control arm ball pins in the X, Y, and Z directions, it simulates the stress conditions of the control arm ball pins under actual conditions, thus more accurately reflecting the actual durability of the control arm.
[0004] The technical solution of this utility model is as follows: a single test fixture for an automotive suspension control arm, comprising a base plate, a large bushing mounting bracket, a small bushing mounting bracket, a shock absorber simulation mounting bracket, and a three-way loading fixture. The large bushing mounting bracket is provided with a large bushing mounting seat, the small bushing mounting bracket is provided with a small bushing mounting seat, the shock absorber simulation mounting bracket is provided with a shock absorber simulation swing arm mounting seat, and a swing arm is rotatably connected to the shock absorber simulation swing arm mounting seat. The three-way loading fixture includes a "C"-shaped loading seat, and mounting seats for X, Y, and Z-direction loading arms are respectively provided on the outer side of the "C"-shaped loading seat. One end of each of the X, Y, and Z-direction loading arms is connected to the "C"-shaped loading seat through a mounting seat, and the other end is connected to an actuator. The opening of the "C"-shaped loading seat is fixed by a bolt rod, and a control arm ball pin fixing hole is provided on the lower inner side wall of the "C"-shaped loading seat.
[0005] Preferably, the large bushing mounting base is provided with multiple sets of mounting hole pairs at intervals along the vertical direction. Each set of mounting hole pairs includes two horizontally arranged bolt holes. The large bushing mounting base is fixed to two adjacent sets of mounting hole pairs by bolts.
[0006] Preferably, the small bushing mounting base is provided with a plurality of first mounting holes and slots in parallel along the vertical direction, and the small bushing mounting base is fixed to the plurality of first mounting holes and slots by bolts.
[0007] Preferably, the shock absorber simulated swing arm mounting base is provided with multiple sets of second mounting holes and slots at intervals along the vertical direction, each set of second mounting holes and slots including two parallel second mounting holes and slots, and the shock absorber simulated swing arm mounting base is fixed to any set of second mounting holes and slots by bolts.
[0008] Preferably, the mounting base is connected to the "C"-shaped loading base by bolts.
[0009] Preferably, the large bushing mounting bracket is fixed to the control arm large bushing by bolts.
[0010] Preferably, the small bushing mounting bracket is fixed to the small bushing of the control arm by bolts.
[0011] The advantages of this invention are as follows: By simultaneously coupling applied forces to the control arm ball pin in the X, Y, and Z directions, this invention simulates the actual stress condition of the control arm, thus more accurately reflecting the actual durability of the control arm. It features a simple structure, easy operation, a sinusoidal input signal, a simple algorithm, and lower cost. Furthermore, this invention can adjust the positions of the small bushing mounting base, the large bushing mounting base, and the shock absorber simulated swing arm mounting base to meet the installation requirements of different control arms for durability testing, making it widely applicable. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of this utility model;
[0013] Figure 2 This is a schematic diagram of the three-way loading fixture of this utility model. Detailed Implementation
[0014] See Figure 1 and Figure 2A single-unit testing fixture for automotive suspension control arms includes a base plate 1. The base plate 1 is provided with a large bushing mounting bracket 2, a small bushing mounting bracket 3, a shock absorber simulation mounting bracket 4, and a three-way loading fixture 5. The large bushing mounting bracket 2 is provided with a large bushing mounting seat 21. The large bushing mounting bracket 2 has multiple sets of mounting hole pairs 22 spaced vertically. Each mounting hole pair 22 includes two horizontally arranged bolt holes. The large bushing mounting seat 21 is fixed to two adjacent sets of mounting hole pairs 22 by bolts. The large bushing mounting seat 21 is connected and fixed to the control arm large bushing by bolts. This design allows for adjustment of the position of the large bushing mounting seat 21 to meet the specific installation requirements of different control arm large bushings. The small bushing mounting bracket 3 is provided with a small bushing mounting seat 31. The small bushing mounting bracket 3 has multiple first mounting slots 32 arranged parallel to each other in the vertical direction. The small bushing mounting seat 31 is fixed to the multiple first mounting slots 32 by bolts, and the small bushing mounting seat 31 is connected and fixed to the control arm small bushing by bolts. In this embodiment, three first mounting slots 32 are provided, allowing adjustment of the position of the small bushing mounting seat 31 to meet the specific installation requirements of different control arm small bushings. The shock absorber simulation mounting bracket 4 is provided with a shock absorber simulation swing arm mounting seat 41. The shock absorber simulation mounting bracket 4 has multiple sets of second mounting slots 42 spaced apart in the vertical direction. Each set of second mounting slots 42 includes two parallel second mounting slots 42. The shock absorber simulation swing arm mounting seat 41 is fixed to any set of second mounting slots 42 by bolts. In this embodiment, two sets of second mounting holes 42 are provided. The shock absorber simulated swing arm mounting base 41 can be fixed in either set of the two sets of second mounting holes 42 to adjust its position. At the same time, the shock absorber simulated swing arm mounting base 41 can also be moved and adjusted in the second mounting holes 42 before being fixed, thus ensuring the specific installation requirements of the swing arm 43 of different control arms. A rotating arm 43 is rotatably connected to the shock absorber simulated rotating arm mounting base 41. The three-way loading fixture 5 includes a "C"-shaped loading seat 51. The outer side of the "C"-shaped loading seat 51 is provided with mounting bases 52 for X, Y, and Z-direction loading arms 7. One end of each of the X, Y, and Z-direction loading arms 7 is connected and fixed to the mounting base 52 and the "C"-shaped loading seat 51 respectively by bolts, ensuring three-way loading of the "C"-shaped loading seat 51. The other end is connected to an actuator to provide load for loading the "C"-shaped loading seat 51. The opening of the "C"-shaped loading seat 51 is connected by a bolt rod 6. A control arm ball pin fixing hole 53 is provided on the lower inner side wall of the "C"-shaped loading seat 51 for fixing the control arm ball pin, so that the X, Y, and Z-direction loading forces can be applied to the ball pin.
[0015] The usage process of this utility model is as follows: First, adjust and fix the positions of the large bushing mounting base 21 and the small bushing mounting base 31 according to the control arm. Then, install and fix the large bushing and small bushing of the control arm on the large bushing mounting base 21 and the small bushing mounting base 31 respectively. Fix the control arm ball pin to the lower inner side wall of the "C"-shaped loading seat 51 by bolts and the control arm ball pin fixing hole 53. Then, adjust the position of the shock absorber simulation swing arm mounting base 41 so that the swing arm 43 is assembled to the shock absorber mounting position of the control arm to simulate the shock absorber. Finally, input sinusoidal signals to the three actuators simultaneously as required. The sinusoidal signals include force / displacement, frequency, phase angle, number of cycles, etc., and conduct a durability test. After the test, if cracks appear on the control arm, it means that the control arm is unqualified. If there are no cracks on the control arm, it means that the durability of the controller meets the requirements.
[0016] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications made to the present utility model by those skilled in the art without departing from the spirit of the present utility model shall fall within the protection scope of the present utility model.
Claims
1. A single-unit testing fixture for an automotive suspension control arm, comprising a base plate (1), characterized in that: The base plate (1) is provided with a large bushing mounting bracket (2), a small bushing mounting bracket (3), a shock absorber simulation mounting bracket (4), and a three-way loading fixture (5). The large bushing mounting bracket (2) is provided with a large bushing mounting seat (21), the small bushing mounting bracket (3) is provided with a small bushing mounting seat (31), the shock absorber simulation mounting bracket (4) is provided with a shock absorber simulation swing arm mounting seat (41), and a swing arm (43) is rotatably connected to the shock absorber simulation swing arm mounting seat (41). The three-way loading fixture (5) 5) Includes a "C"-shaped loading seat (51), and the outer side of the "C"-shaped loading seat (51) is provided with mounting seats (52) for loading arms (7) in the X, Y, and Z directions respectively. One end of the loading arms (7) in the X, Y, and Z directions is connected to the "C"-shaped loading seat (51) through the mounting seats (52), and the other end is connected to an actuator. The opening of the "C"-shaped loading seat (51) is connected by a bolt rod (6). A control arm ball pin fixing hole (53) is provided on the lower inner side wall of the "C"-shaped loading seat (51).
2. The automotive suspension control arm single-unit testing fixture according to claim 1, characterized in that: The large bushing mounting bracket (2) is provided with multiple sets of mounting hole pairs (22) at intervals along the vertical direction. Each set of mounting hole pairs (22) includes two horizontally arranged bolt holes. The large bushing mounting seat (21) is fixed to two adjacent sets of mounting hole pairs (22) in the multiple sets of mounting hole pairs (22) by bolts.
3. The automotive suspension control arm single-unit testing fixture according to claim 1, characterized in that: The small bushing mounting bracket (3) has multiple first mounting holes (32) arranged parallel to each other in the vertical direction, and the small bushing mounting seat (31) is fixed to the multiple first mounting holes (32) by bolts.
4. The automotive suspension control arm single-unit testing fixture according to claim 1, characterized in that: The shock absorber simulation mounting bracket (4) is provided with multiple sets of second mounting holes (42) at intervals along the vertical direction. Each set of second mounting holes (42) includes two parallel second mounting holes (42). The shock absorber simulation swing arm mounting seat (41) is fixed to any set of second mounting holes (42) by bolts.
5. The automotive suspension control arm single-unit testing fixture according to claim 1, characterized in that: The mounting base (52) and the "C"-shaped loading base (51) are fixed together by bolts.
6. The automotive suspension control arm single-unit testing fixture according to claim 1, characterized in that: The large bushing mounting base (21) is fixed to the control arm large bushing by bolts.
7. The automotive suspension control arm single-unit testing fixture according to claim 1, characterized in that: The small bushing mounting base (31) is fixed to the small bushing of the control arm by bolts.