Vehicle body structure fatigue testing device

Abstract

The utility model belongs to the technical field of vehicle testing, and particularly relates to a vehicle body structure fatigue testing device which comprises a vehicle body shell, the vehicle body shell is fixedly connected with a fixing plate, the fixing plate is provided with a connecting block, the connecting block is fixedly connected with an internal assembly, the fixing plate is provided with a testing sensing device, and the testing sensing device is connected with the internal assembly. The test sensing device comprises a rotating shaft. According to the vehicle body structure fatigue testing device, the fatigue condition of the vehicle body structure is analyzed and the fatigue life of the vehicle body structure is evaluated through the test sensing device and the control system according to information such as the triggered times and time intervals of the sensor, and tiny deformation of the vehicle body structure in the fatigue testing process can be accurately converted into detectable signals. Through cooperative work of the extrusion plate, the folding plate, the rotating plate and other parts, deformation of the vehicle body is transmitted to the induction block, when the induction block touches the inductor, a signal can be sent out in time, and an accurate basis is provided for evaluating the fatigue condition of the vehicle body structure.

Description

A fatigue testing device for vehicle body structure Technical Field

[0001] This utility model relates to the field of vehicle testing technology, specifically to a vehicle body structure fatigue testing device. Background Technology

[0002] With the rapid development of the automotive industry, vehicle safety and reliability have become key concerns for consumers, and the fatigue performance of the vehicle body structure is one of the key indicators for measuring the safety and reliability of a vehicle. Throughout the entire lifespan of a vehicle, the body needs to continuously withstand alternating loads from complex operating conditions such as road bumps, vehicle acceleration and deceleration, and steering operations. Under the long-term action of these alternating loads, the body structure is highly susceptible to fatigue damage, such as cracks and deformation. These problems not only affect the appearance and comfort of the vehicle, but more seriously, they may lead to safety accidents, threatening the lives of drivers and passengers.

[0003] Currently, existing methods and equipment for fatigue testing of vehicle body structures have many shortcomings. Some traditional testing devices can only simulate single load conditions, such as vertical vibration loads, and cannot comprehensively reflect the complex stress conditions experienced by the vehicle body during actual driving. This significantly reduces the accuracy of test results, making it difficult to effectively assess the fatigue life of the vehicle body structure. This undoubtedly increases the cost of automotive R&D and prolongs the time to market for new models, putting automakers at a disadvantage in fierce market competition. Therefore, developing a device that can more accurately and efficiently conduct fatigue testing of vehicle body structures is urgently needed. Summary of the Invention

[0004] The main objective of this invention is to provide a vehicle body structure fatigue testing device that can solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model proposes a vehicle body structure fatigue testing device, including a vehicle body shell, a fixing plate fixedly connected to the vehicle body shell, a connecting block provided on the fixing plate, an internal component fixedly connected to the connecting block, and a testing sensing device provided on the fixing plate, the testing sensing device comprising:

[0006] A rotating shaft is rotatably connected to the fixed plate.

[0007] Preferably, the rotating shaft is fixedly connected to an extrusion plate, and the extrusion plate is rotatably connected to a folding plate. When the vehicle body structure contracts inward, the extrusion plate is subjected to extrusion force.

[0008] Preferably, a rotating plate is movably connected to the end of the folding plate away from the extrusion plate, and the crossbar of the rotating plate is rotatably connected to the support plate. When the extrusion plate is subjected to force, it can drive the rotating plate to rotate through the folding plate.

[0009] Preferably, the rotating shaft is fixedly connected to an extension plate, the extension plate is hinged to a hinge plate, and the spring provides elastic support for the extension plate, enabling it to respond flexibly when the vehicle body structure deforms.

[0010] Preferably, the extension plate is elastically connected to the vehicle body shell by a spring, and the hinge plate is hinged with a hinge rod.

[0011] Preferably, the hinge plate is fixedly connected to a push plate and a sensing block. A sensor is provided on the outer side of the sensing block. When the sensing block is subjected to a squeezing force, it approaches the sensor, causing the sensing block to touch the sensor.

[0012] This invention provides a fatigue testing device for vehicle body structures. It has the following beneficial effects:

[0013] (1) This vehicle body structure fatigue testing device, through its set testing sensing device, controls the system to analyze the fatigue condition of the vehicle body structure and evaluate its fatigue life based on information such as the number of times the sensor 512 is triggered and the time interval. It can accurately convert the minute deformation of the vehicle body structure during the fatigue test into a detectable signal. The coordinated work of components such as the extrusion plate, folding plate, and rotating plate transmits the deformation of the vehicle body to the sensing block. When the sensing block touches the sensor, it can promptly send a signal, providing an accurate basis for evaluating the fatigue condition of the vehicle body structure.

[0014] (2) The vehicle body structure fatigue testing device, through its exterior shell and the use of high-strength, corrosion-resistant metal materials for key components, along with its reasonable structural design, ensures high stability and durability. During long-term testing, it maintains good working condition, reducing test interruptions and errors caused by component damage. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 is a schematic diagram of the overall three-dimensional structure of this utility model;

[0017] Figure 2 is a schematic diagram of the overall three-dimensional structure of this utility model.

[0018] Figure 3 is a schematic diagram of structure A in Figure 2 of this utility model;

[0019] Figure 4 is a schematic diagram of the structure of the testing sensing device of this utility model.

[0020] Explanation of icon numbers:

[0021] 1. Body shell; 2. Fixing plate; 3. Connecting block; 4. Internal components; 5. Test sensing device; 51. Rotating shaft; 52. Extrusion plate; 53. Folding plate; 54. Support plate; 55. Rotating plate; 56. Extension plate; 57. Spring; 58. Hinge plate; 59. Hinge rod; 510. Push plate; 511. Sensing block; 512. Sensor.

[0022] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please refer to Figures 1-4. This utility model proposes a vehicle body structure fatigue testing device, including a vehicle body shell 1, a fixing plate 2 fixedly connected to the vehicle body shell 1, a connecting block 3 provided on the fixing plate 2, and an internal component 4 fixedly connected to the connecting block 3. The internal component 4 can simulate the internal structure and stress conditions of the vehicle body. A test sensing device 5 is provided on the fixing plate 2, and the test sensing device 5 includes a rotating shaft 51.

[0025] In this embodiment of the invention, to enable the vehicle body structure fatigue testing device to operate better, specifically, a rotating shaft 51 is rotatably connected to the fixed plate 2, and a pressing plate 52 is fixedly connected to the rotating shaft 51. The pressing plate 52 is rotatably connected to a folding plate 53. When the vehicle body structure contracts inward, the pressing plate 52 is subjected to compressive force. A rotating plate 55 is movably connected to the end of the folding plate 53 away from the pressing plate 52. The crossbar of the rotating plate 55 is rotatably connected to the support plate 54. When the pressing plate 52 is under force, it can drive the rotating plate 55 to rotate through the folding plate 53. The rotating shaft 51 is fixedly connected to the fixed plate 2. An extension plate 56 is fixedly connected to the body shell 1, and a hinge plate 58 is hinged to the extension plate 56. The spring 57 provides elastic support for the extension plate 56, allowing it to respond flexibly when the body structure deforms. The extension plate 56 is elastically connected to the body shell 1 through the spring 57. A hinge rod 59 is hinged to the hinge plate 58. A push plate 510 and a sensing block 511 are fixedly connected to the hinge plate 58. A sensor 512 is provided on the outside of the sensing block 511. When the sensing block 511 is subjected to a squeezing force, it approaches the sensor 512, causing the sensing block 511 to touch the sensor 512.

[0026] In this invention, during testing, the testing equipment applies an alternating load simulating actual working conditions to the vehicle body shell 1. When the vehicle body structure deforms inward under the load, the extrusion plate 52 is subjected to extrusion force. This extrusion force causes the extrusion plate 52 to rotate around the pivot 51. The rotation of the extrusion plate 52 drives the folding plate 53 to move, and the folding plate 53 pushes the rotating plate 55 to rotate around the crossbar on the support plate 54. Simultaneously, the rotation of the pivot 51 drives the extension plate 56 to rotate. During the rotation, the extension plate 56 stretches or compresses the spring 57. The elastic force of the spring 57 generates a reaction force on the rotation of the extension plate 56, making the rotation of the extension plate 56 more stable. The rotation of the extension plate 56 drives the hinge rod 59 to move through the hinge plate 58, simultaneously pushing the push plate 510 and the sensing block 511 to move. When the deformation of the vehicle body structure reaches a certain degree, the sensing block 511 is subjected to extrusion force and approaches the sensor 512, eventually touching the sensor 512. When sensor 512 is triggered, it emits a signal, which can be received and recorded by the control system of the testing equipment. Based on information such as the number of times sensor 512 is triggered and the time intervals, the control system analyzes the fatigue condition of the vehicle body structure and assesses its fatigue life.

[0027] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A vehicle body structure fatigue testing device, comprising a vehicle body shell (1), characterized in that: The vehicle body shell (1) is fixedly connected to a fixing plate (2), a connecting block (3) is provided on the fixing plate (2), an internal component (4) is fixedly connected to the connecting block (3), a test sensing device (5) is provided on the fixing plate (2), and the test sensing device (5) includes a rotating shaft (51), and the fixing plate (2) is rotatably connected to the rotating shaft (51).

2. The vehicle body structure fatigue testing device according to claim 1, characterized in that: The rotating shaft (51) is fixedly connected to the extrusion plate (52), and the extrusion plate (52) is rotatably connected to the folding plate (53).

3. The vehicle body structure fatigue testing device according to claim 2, characterized in that: The end of the folding plate (53) away from the extrusion plate (52) is movably connected to a rotating plate (55), and the crossbar of the rotating plate (55) is rotatably connected to the support plate (54).

4. The vehicle body structure fatigue testing device according to claim 3, characterized in that: The rotating shaft (51) is fixedly connected to an extension plate (56), and the extension plate (56) is hinged to a hinge plate (58).

5. The vehicle body structure fatigue testing device according to claim 4, characterized in that: The extension plate (56) is elastically connected to the body shell (1) by a spring (57), and the hinge plate (58) is hinged with a hinge rod (59).

6. The vehicle body structure fatigue testing device according to claim 5, characterized in that: The hinge plate (58) is fixedly connected to the push plate (510) and the sensing block (511), and a sensor (512) is provided on the outside of the sensing block (511).

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