A loading device for durability bench test of automobile subframe

Abstract

This utility model discloses a loading device for a vehicle subframe durability test bench. The loading device has four channels, which can reproduce the comprehensive load conditions of the subframe under multi-channel conditions, closely resembling the deformation conditions during vehicle use. This ensures a comprehensive assessment of the subframe's durability performance and guarantees the accuracy of the durability test. Because the load on the mounting points on the control arm has an angle in the design direction, interference occurs between the first and third actuators, and between the second and fourth actuators. By designing an avoidance mechanism, interference-free loading in the design direction is successfully achieved, effectively solving the interference problem in the control arm mounting point test loading and improving the accuracy of the test simulation.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing technology, specifically to a loading device for automobile subframe durability bench testing. Background Technology

[0002] The automotive subframe is an intermediate component connecting the suspension system to the vehicle frame. The suspension system is mounted on the subframe to form the suspension assembly, which is then connected to the vehicle frame to form a complete system. By adjusting the stiffness of the subframe, the comfort and stability of the vehicle during driving can be effectively improved. At the same time, the subframe also takes the place of the vehicle frame in bearing various static loads, impact loads, and alternating loads of different natures and directions.

[0003] Subframe durability testing is a crucial and rigorous bench test in the development and validation of automotive chassis. Its core objective is to comprehensively evaluate the fatigue strength, durability, and structural reliability of the subframe structure under various complex alternating loads throughout the simulated lifespan of the entire vehicle. Durability testing utilizes advanced hydraulic servo actuators in a highly simulated laboratory environment to accurately reproduce the multi-channel load spectrum acting on the subframe-body connection points, suspension connection points, and powertrain mounting points under various extreme and typical operating conditions. During the test, the subframe assembly is securely fixed to the test bench, and the actuators apply long-term, high-frequency cyclic loading according to pre-acquired and processed target load signals to identify any potential crack initiation, propagation signs, plastic deformation, or abnormal noises.

[0004] However, due to the structural limitations of the subframe, most existing bench testing equipment is single-channel or dual-channel, which cannot reproduce the comprehensive load conditions of the subframe under multi-channel conditions, resulting in the subframe's durability performance not being fully assessed. Utility Model Content

[0005] Therefore, it is necessary to provide a loading device for automotive subframe durability bench testing, which addresses the problem that existing bench testing devices are mostly single-channel or dual-channel and cannot reproduce the comprehensive load conditions of the subframe under multi-channel conditions.

[0006] A loading device for a vehicle subframe durability bench test includes: A rigid frame is used to fix the subframe, which has four mounting points. Four actuating devices are connected to the four mounting points respectively, and the actuating devices are used to apply loads to the subframe.

[0007] In one embodiment, the four actuating devices include a first actuating device, a second actuating device, a third actuating device, and a fourth actuating device; The first and second actuating devices are arranged symmetrically about the rigid frame, and the third and fourth actuating devices are also arranged symmetrically about the rigid frame.

[0008] In one embodiment, the first actuation device includes a first reaction frame, a first actuator, and a first actuating rod. The first actuator is mounted on the first reaction frame, the first actuating rod is connected to the first actuator, and the first actuating rod is connected to a mounting point.

[0009] In one embodiment, the second actuation device includes a second reaction frame, a second actuator, and a second action rod. The second actuator is mounted on the second reaction frame, the second action rod is connected to the second actuator, and the second action rod is connected to a mounting point.

[0010] In one embodiment, the third actuation device includes a third reaction frame, a third actuator, and a first avoidance mechanism. The third actuator is mounted on the third reaction frame, the first avoidance mechanism is connected to the third actuator, and the first avoidance mechanism is connected to a mounting point.

[0011] In one embodiment, the first actuating device and the third actuating device intersect each other in space, and the first avoidance mechanism has space for the first actuating device to pass through.

[0012] In one embodiment, the first avoidance mechanism includes two first connecting plates and two first connecting blocks. The two first connecting plates are arranged parallel to each other at intervals, and the two first connecting blocks are arranged at intervals between the two first connecting plates. The two ends of the first connecting plates are respectively fixedly connected to the two first connecting blocks, and the gap between the two first connecting blocks forms a space for the first actuator to pass through.

[0013] In one embodiment, the fourth actuation device includes a fourth reaction frame, a fourth actuator, and a second avoidance mechanism. The fourth actuator is mounted on the fourth reaction frame, the second avoidance mechanism is connected to the fourth actuator, and the second avoidance mechanism is connected to a mounting point.

[0014] In one embodiment, the second actuating device and the fourth actuating device intersect each other in space, and the second avoidance mechanism has space for the second actuating device to pass through.

[0015] In one embodiment, the second avoidance mechanism includes two second connecting plates and two second connecting blocks. The two second connecting plates are arranged parallel to each other at intervals, and the two second connecting blocks are arranged at intervals between the two second connecting plates. The two ends of the second connecting plates are respectively fixedly connected to the two second connecting blocks, and the gap between the two second connecting blocks forms a space for the second actuator to pass through.

[0016] The aforementioned automotive subframe durability test loading device has four mounting points on the subframe, and four actuating devices are connected to the four mounting points respectively. The actuating devices are used to apply loads to the subframe. The test loading device has four channels, which can reproduce the stress and deformation of the subframe, similar to the deformation during vehicle use. This ensures that the durability performance of the subframe is comprehensively assessed, guaranteeing the accuracy of the durability test. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is a schematic diagram of the loading device for a vehicle subframe durability test bench in one embodiment; Figure 2 for Figure 1 Schematic diagram of the four sets of actuators in the middle; Figure 3 for Figure 2 A magnified view of a section at point A in the middle; Figure 4 for Figure 2 A magnified view of a section at point B.

[0019] Figure label: 10- Rigid frame, 20- Actuating device, 21- First actuating device, 211- First reaction frame, 212- First actuator, 213- First action rod, 22- Second actuating device, 221- Second reaction frame, 222- Second actuator, 223- Second action rod, 23- Third actuating device, 231- Third reaction frame, 232- Third actuator, 233- First clearance mechanism, 2331- First connecting plate, 2332- First connecting block, 24- Fourth actuating device, 241- Fourth reaction frame, 242- Fourth actuator, 243- Second clearance mechanism, 2431- Second connecting plate, 2432- Second connecting block, 25- Washer, 26- Joint bearing. Detailed Implementation

[0020] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0023] Please see Figure 1 One embodiment of the automotive subframe durability test loading device includes a rigid frame 10 and four actuating devices 20.

[0024] The rigid frame 10 is used to fix the subframe. The fixing of the subframe by the rigid frame 10 needs to simulate the connection structure between the subframe and the vehicle body. During the test, the deformation of the subframe under stress should be similar to the deformation of the whole vehicle during use.

[0025] The subframe has four mounting points, which are specifically arranged on the control arm of the subframe. Four actuators 20 are connected to the four mounting points respectively, and the actuators 20 are used to apply loads to the subframe. The test loading device is four-channel, and the load on the subframe on the vehicle body is also four points. Therefore, the comprehensive load application of the subframe under multi-channel conditions can be reproduced, effectively verifying the durability performance of the subframe.

[0026] Please refer to the following: Figure 2 In one embodiment, the four actuating devices 20 are a first actuating device 21, a second actuating device 22, a third actuating device 23, and a fourth actuating device 24. The first actuating device 21 and the second actuating device 22 are arranged symmetrically about the rigid frame 10, and the third actuating device 23 and the fourth actuating device 24 are arranged symmetrically about the rigid frame 10.

[0027] In one embodiment, the first actuation device 21 includes a first reaction frame 211, a first actuator 212, and a first actuating rod 213. The first reaction frame 211 can be mounted on the ground or a test bench. The first actuator 212 is mounted on the first reaction frame 211. One end of the first actuating rod 213 is connected to the first actuator 212, and the other end is connected to a mounting point. The first actuator 212 provides a load, which is applied to the mounting point via the first actuating rod 213. The first actuator 212 can be a hydraulic cylinder or a jack, etc., to achieve telescopic movement.

[0028] Please refer to the following: Figure 3 To facilitate the connection between the first actuating rod 213 and the mounting point, and to transfer the load to the mounting point, the first actuating device 21 also includes a washer 25 and a spherical bearing 26. The inner ring of the washer 25 is bolted to the mounting point, and the outer ring of the washer 25 is mated with the inner ring of the spherical bearing 26. The spherical bearing 26 is connected to the first actuating rod 213, and the spherical bearing 26 and the first actuating rod 213 are on the same horizontal line.

[0029] In one embodiment, the second actuation device 22 includes a second reaction frame 221, a second actuator 222, and a second actuating rod 223. The second reaction frame 221 can be mounted on the ground or a test bench. The second actuator 222 is mounted on the second reaction frame 221. One end of the second actuating rod 223 is connected to the second actuator 222, and the other end is connected to a mounting point. The second actuator 222 provides a load, which is applied to the mounting point via the second actuating rod 223. The second actuator 222 can be a hydraulic cylinder or a jack, etc., to achieve telescopic movement.

[0030] Please refer to the following: Figure 4 To facilitate the connection between the second actuating rod 223 and the mounting point, and to transfer the load to the mounting point, the second actuating device 22 also includes a washer 25 and a spherical bearing 26. The inner ring of the washer 25 is bolted to the mounting point, and the outer ring of the washer 25 is mated with the inner ring of the spherical bearing 26. The spherical bearing 26 is connected to the second actuating rod 223.

[0031] In one embodiment, the third actuation device 23 includes a third reaction frame 231, a third actuator 232, and a first clearance mechanism 233. The third reaction frame 231 is mounted on the ground or a test bench, the third actuator 232 is mounted on the third reaction frame 231, and the first clearance mechanism 233 is connected to the third actuator 232 and to a mounting point. The third actuator 232 provides a load, which is applied to the mounting point via the first clearance mechanism 233. The third actuator 232 can be a hydraulic cylinder or a jack, etc., to achieve telescopic movement.

[0032] In one embodiment, to facilitate the connection between the first clearance mechanism 233 and the mounting point, and to transfer the load to the mounting point, the third actuator 232 further includes a washer 25 and a spherical bearing 26. The inner ring of the washer 25 is bolted to the mounting point, and the outer ring of the washer 25 is mated with the inner ring of the spherical bearing 26. The spherical bearing 26 is connected to the first clearance mechanism 233.

[0033] Please see Figure 3 In one embodiment, because the load on the mounting point on the control arm has an angle in the design direction, the first actuator 21 and the third actuator 23 intersect each other in space, causing interference between the first actuator 21 and the third actuator 23 during test loading. Therefore, the first avoidance mechanism 233 is provided with a space for the first actuator 212 to pass through, allowing the first actuator 212 to move freely within this space, thus avoiding the interference problem of the mounting point during test loading.

[0034] Based on the above embodiments, specifically, the first obstacle avoidance mechanism 233 includes two first connecting plates 2331 and two first connecting blocks 2332. The two first connecting plates 2331 are arranged parallel to each other at intervals, and the two first connecting blocks 2332 are installed between the two first connecting plates 2331 and are arranged at intervals. The two ends of the first connecting plates 2331 are respectively fixedly connected to the two first connecting blocks 2332, such as by bolts. The gap between the two first connecting blocks 2332 forms a space for the first actuator 212 to pass through.

[0035] Specifically, in this embodiment, the first actuating rod 213 passes through the space of the first avoidance mechanism 233. The spherical bearing 26 is connected to one first connecting block 2332, and the other first connecting block 2332 is connected to the second actuator 222. During the reciprocating motion of the first avoidance mechanism 233 and the first actuating rod 213, the first avoidance mechanism 233 always maintains a non-contact state with the first actuating rod 213, avoiding interference between the first actuator 212 and the third actuator 232. Furthermore, the opposing surfaces of the first connecting blocks 2332 are parallel inclined planes, which can increase the range of motion of the first actuating rod 213.

[0036] Please refer to it again. Figure 2 In one embodiment, the fourth actuation device 24 includes a fourth reaction frame 241, a fourth actuator 242, and a second avoidance mechanism 243. The fourth reaction frame 241 is mounted on the ground or a test bench, the fourth actuator 242 is mounted on the fourth reaction frame 241, and the second avoidance mechanism 243 is connected to the fourth actuator 242 and to a mounting point. The fourth actuator 242 provides a load, which is applied to the mounting point via the second avoidance mechanism 243. The fourth actuator 242 can be a hydraulic cylinder or a jack, etc., to achieve telescopic movement.

[0037] Please see Figure 4 In one embodiment, to facilitate the connection between the second clearance mechanism 243 and the mounting point, and to transfer the load to the mounting point, the fourth actuator 242 further includes a washer 25 and a spherical bearing 26. The inner ring of the washer 25 is bolted to the mounting point, and the outer ring of the washer 25 is mated with the inner ring of the spherical bearing 26. The spherical bearing 26 is connected to the first clearance mechanism 233.

[0038] In one embodiment, because the load on the mounting point on the control arm has an angle in the design direction, the first actuator 21 and the fourth actuator 24 intersect each other in space, causing interference between the first actuator 21 and the fourth actuator 24 during test loading. Therefore, the second avoidance mechanism 243 is provided with a space for the second actuator 222 to pass through, allowing the second actuator 222 to move freely within this space, thus avoiding the interference problem of the mounting point during test loading.

[0039] Based on the above embodiments, specifically, the second obstacle avoidance mechanism 243 includes two second connecting plates 2431 and two second connecting blocks 2432. The two second connecting plates 2431 are arranged parallel to each other at intervals, and the two second connecting blocks 2432 are installed between the two second connecting plates 2431 and are spaced apart. The two ends of the second connecting plates 2431 are respectively fixedly connected to the two second connecting blocks 2432, such as by bolts. The gap between the two second connecting blocks 2432 forms a space for the second actuator 222 to pass through.

[0040] Specifically, in this embodiment, the second actuating rod 223 passes through the space of the second avoidance mechanism 243. The spherical bearing 26 is connected to one second connecting block 2432, and the other second connecting block 2432 is connected to the fourth actuator 242. During the reciprocating motion of the second avoidance mechanism 243 and the second actuating rod 223, the second avoidance mechanism 243 always maintains a non-contact state with the second actuating rod 223, avoiding interference between the second actuator 222 and the fourth actuator 242. Furthermore, the opposing surfaces of the second connecting blocks 2432 are parallel inclined planes, which can increase the range of motion of the second actuating rod 223.

[0041] The aforementioned automotive subframe durability test loading device is a four-channel device that can reproduce the comprehensive load conditions of the subframe under multi-channel conditions, closely resembling the deformation conditions during vehicle use. This ensures a comprehensive assessment of the subframe's durability performance and guarantees the accuracy of the durability test. Because the load on the mounting points on the control arm has an angle in the design direction, interference occurs between the first actuator 212 and the third actuator 232, and between the second actuator 222 and the fourth actuator 242. By designing an avoidance mechanism, interference-free loading in the design direction was successfully achieved, effectively solving the interference problem in the control arm mounting point test loading and improving the accuracy of the test simulation.

[0042] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A loading device for a durability bench test of an automotive subframe, characterized in that, include: A rigid frame is used to fix the subframe, which has four mounting points. Four actuating devices are connected to the four mounting points respectively, and the actuating devices are used to apply loads to the subframe.

2. The loading device for automobile subframe durability bench testing according to claim 1, characterized in that, The four actuators include a first actuator, a second actuator, a third actuator, and a fourth actuator; The first and second actuating devices are arranged symmetrically about the rigid frame, and the third and fourth actuating devices are also arranged symmetrically about the rigid frame.

3. The loading device for automobile subframe durability bench testing according to claim 2, characterized in that, The first actuation device includes a first reaction frame, a first actuator, and a first actuating rod. The first actuator is mounted on the first reaction frame, the first actuating rod is connected to the first actuator, and the first actuating rod is connected to a mounting point.

4. The loading device for automobile subframe durability bench testing according to claim 2, characterized in that, The second actuation device includes a second reaction frame, a second actuator, and a second actuating rod. The second actuator is mounted on the second reaction frame, the second actuating rod is connected to the second actuator, and the second actuating rod is connected to a mounting point.

5. The loading device for automobile subframe durability bench testing according to claim 3, characterized in that, The third actuation device includes a third reaction frame, a third actuator, and a first avoidance mechanism. The third actuator is mounted on the third reaction frame, the first avoidance mechanism is connected to the third actuator, and the first avoidance mechanism is connected to a mounting point.

6. The loading device for automobile subframe durability bench testing according to claim 5, characterized in that, The first actuating device and the third actuating device intersect each other in space, and the first avoidance mechanism has a space for the first actuating device to pass through.

7. The loading device for automobile subframe durability test bench according to claim 6, characterized in that, The first obstacle avoidance mechanism includes two first connecting plates and two first connecting blocks. The two first connecting plates are arranged parallel to each other at intervals, and the two first connecting blocks are arranged at intervals between the two first connecting plates. The two ends of the first connecting plates are respectively fixedly connected to the two first connecting blocks, and the gap between the two first connecting blocks forms a space for the first actuator to pass through.

8. The loading device for automobile subframe durability bench testing according to claim 4, characterized in that, The fourth actuation device includes a fourth reaction frame, a fourth actuator, and a second avoidance mechanism. The fourth actuator is mounted on the fourth reaction frame, the second avoidance mechanism is connected to the fourth actuator, and the second avoidance mechanism is connected to a mounting point.

9. The loading device for automobile subframe durability test bench according to claim 8, characterized in that, The second actuating device and the fourth actuating device intersect each other in space, and the second avoidance mechanism has a space for the second actuating device to pass through.

10. The loading device for automobile subframe durability bench testing according to claim 9, characterized in that, The second obstacle avoidance mechanism includes two second connecting plates and two second connecting blocks. The two second connecting plates are arranged parallel to each other at intervals, and the two second connecting blocks are arranged at intervals between the two second connecting plates. The two ends of the second connecting plates are respectively fixedly connected to the two second connecting blocks, and the gap between the two second connecting blocks forms a space for the second actuator to pass through.

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