Test bench for loading load in three stages

Abstract

The utility model discloses a test bench for loading a load in three stages, which relates to the technical field of vehicle engineering and comprises a platform, and a fixing frame is arranged on the platform. And two supporting seats are mounted at the top of the platform. The oil cylinder drives the rotating frame to rotate, and then the first connecting rod and the second connecting rod are driven to move oppositely, so that the two ends of the anti-side-rolling torsion bar are subjected to the action of opposite force. According to the design, the complex stress condition borne by the anti-side-rolling torsion bar in actual operation can be highly accurately simulated, and compared with a traditional mode, the reduction degree of the actual operation working condition of the anti-side-rolling torsion bar is greatly improved. On the basis, the performance of the anti-side-rolling torsion bar is evaluated through force change data fed back by the force sensor, the fatigue life and the performance reliability of the anti-side-rolling torsion bar in actual operation can be reflected more accurately, and a more reliable basis is provided for quality control and performance optimization of products.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle engineering technology, specifically a test bench for loading loads in three stages. Background Technology

[0002] Anti-roll torsion bars are key balancing components in rail transit vehicles, balancing the car body and ensuring smooth and safe operation during train operation. Before installing anti-roll torsion bar devices on the car body, long-term operational fatigue testing is required to ensure their performance.

[0003] Currently, most existing anti-roll torsion bar fatigue testing rigs employ relatively simple loading methods, making it difficult to accurately simulate the complex dynamic load conditions experienced by anti-roll torsion bars during actual operation. In real-world operation, the load on the anti-roll torsion bar is not constant but exhibits distinct phased characteristics depending on the train's operating state. For example, during train startup, acceleration changes significantly, and the load on the anti-roll torsion bar increases rapidly; during normal operation, the load is relatively stable but still fluctuates; and during braking, the load changes drastically. Existing testing rigs cannot accurately simulate and apply loads in stages to address these different load characteristics, leading to significant discrepancies between test results and actual conditions, and making it impossible to accurately assess the fatigue life and performance reliability of anti-roll torsion bars in actual operation. Utility Model Content

[0004] The present invention aims to solve the technical problems existing in the prior art; to this end, the present invention proposes a test bench with load applied in three stages.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A test bench for loading loads in three stages includes a platform on which a fixed frame is mounted.

[0007] Two support seats are installed on the top of the platform for mounting anti-roll torsion bars. A movable motion rod mechanism is provided above the platform for fatigue testing of the anti-roll torsion bars.

[0008] As a further embodiment of this utility model: a base is fixedly connected to the top of the platform, and a rotatable rotating frame is provided on the base.

[0009] As a further embodiment of this utility model: the motion rod mechanism consists of a first connecting rod and a second connecting rod, and a force sensor is provided on the first connecting rod.

[0010] As a further embodiment of this utility model: both connecting rod one and connecting rod two are hinged to the rotating frame, and connecting rod one and connecting rod two are respectively located on both sides of the bottom of the rotating frame.

[0011] As a further embodiment of this utility model: both connecting rod one and connecting rod two are rotatably connected to the anti-roll torsion bar.

[0012] As a further embodiment of this utility model: two fixing frames are provided, and a crossbeam is provided between the two fixing frames.

[0013] As a further embodiment of this utility model: a hydraulic cylinder is installed on the crossbeam, and a connecting rod is installed on the hydraulic cylinder.

[0014] As a further embodiment of this utility model: the connecting rod three is hinged to the rotating frame.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This application utilizes a hydraulic cylinder to drive the rotating frame, which in turn causes connecting rod one and connecting rod two to move in opposite directions, resulting in opposing forces acting on both ends of the anti-roll torsion bar. This design can highly accurately simulate the complex stress conditions experienced by the anti-roll torsion bar in real-world operation, significantly improving the fidelity to the actual operating conditions of the anti-roll torsion bar compared to traditional methods. Based on this, evaluating the performance of the anti-roll torsion bar using force change data fed back from force sensors can more accurately reflect its fatigue life and performance reliability in actual operation, providing a more reliable basis for product quality control and performance optimization. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present utility model;

[0018] Figure 2 This utility model Figure 1 A magnified view of a portion of point A in the middle.

[0019] In the diagram: 1. Platform; 2. Fixed frame; 3. Support base; 4. Anti-roll torsion bar; 5. Motion rod mechanism; 51. Link 1; 52. Link 2; 53. Force sensor; 6. Base; 7. Rotating frame; 8. Crossbeam; 9. Hydraulic cylinder; 10. Link 3. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] Example 1

[0022] Please see Figures 1-2 As shown, this application provides a test bench for loading loads in three stages, including a platform 1, on which a fixed frame 2 is provided;

[0023] Two support seats 3 are installed on the top of the platform 1. These two support seats 3 are used to mount the anti-roll torsion bar 4. A movable motion rod mechanism 5 is provided above the platform 1. The motion rod mechanism 5 is used for fatigue testing of the anti-roll torsion bar 4. The anti-roll torsion bar 4 is installed on the support seats 3. Then, connecting rod 1 51 and connecting rod 2 52 are connected to the anti-roll torsion bar 4 respectively. Next, the hydraulic cylinder 9 is activated, which drives connecting rod 3 10 to move, causing the rotating frame 7 to rotate. The rotating frame 7 then drives connecting rod 1 51 and connecting rod 2 52 to move in opposite directions, so that the two ends of the anti-roll torsion bar 4 are subjected to opposite forces. The performance of the anti-roll torsion bar 4 is evaluated by the force change data fed back by the force sensor 53. This more accurately reflects its fatigue life and performance reliability in actual operation, providing a more reliable basis for product quality control and performance optimization.

[0024] A base 6 is fixedly connected to the top of the platform 1, and a rotatable rotating frame 7 is provided on the base 6. The rotating frame 7 is rotatably connected to the base 6 through bearings.

[0025] The motion lever mechanism 5 consists of a first connecting rod 51 and a second connecting rod 52. A force sensor 53 is installed on the first connecting rod 51. The first connecting rod 51 is divided into upper and lower parts, and the force sensor 53 is installed between the upper and lower parts.

[0026] Both connecting rod 51 and connecting rod 52 are hinged to the rotating frame 7, and connecting rod 51 and connecting rod 52 are located on both sides of the bottom of the rotating frame 7.

[0027] Both connecting rod 51 and connecting rod 52 are rotatably connected to the anti-roll torsion bar 4.

[0028] Two fixing frames 2 are provided, and a crossbeam 8 is provided between the two fixing frames 2.

[0029] A hydraulic cylinder 9 is mounted on the crossbeam 8, and a connecting rod 10 is mounted on the hydraulic cylinder 9. Control equipment: The force-applying cylinder is controlled by a hydraulic servo controller, which consists of a servo valve, a servo valve amplifier, a force sensor, a force sensor amplifier, a signal generator, and a PID controller. The hydraulic servo controller needs to be calibrated before the test to ensure that the load displayed by the instrument is equal to the actual load. Regular calibration by the metrology department is required. Hydraulic pump station: The hydraulic pump station is the power source of the test device, providing hydraulic oil to the cylinders to enable their operation. This test device uses a 30kW motor and a 63L / min oil pump. The pump station also includes an oil tank, safety valve, relief valve, cooling tower, heat exchanger, hydraulic gauge, level gauge, high-precision filter, and other equipment.

[0030] The connecting rod 310 is hinged to the rotating frame 7.

[0031] The working principle of this invention is as follows: The anti-roll torsion bar 4 is installed on the support base 3. Then, connecting rod 1 51 and connecting rod 2 52 are connected to the anti-roll torsion bar 4. Next, the hydraulic cylinder 9 is activated, which drives connecting rod 3 10 to move, causing the rotating frame 7 to rotate. The rotating frame 7 then drives connecting rod 1 51 and connecting rod 2 52 to move in opposite directions, resulting in opposite forces acting on both ends of the anti-roll torsion bar 4. The performance of the anti-roll torsion bar 4 is evaluated using force change data fed back by the force sensor 53. This provides a more accurate reflection of its fatigue life and performance reliability in actual operation, offering a more reliable basis for product quality control and performance optimization.

[0032] The purpose, loading method, and significance of the specific three-stage loading method are as follows:

[0033] Phase 1: Preloading

[0034] Objective: To eliminate the gap between the specimen and the fixture, check the initial state of the test bench (such as the stability of the sensors and fixtures), and ensure the normal operation of the test system.

[0035] Loading method: Loading and unloading are usually performed with a low load (such as 5%-10% of the maximum load) to observe the initial deformation of the specimen and the response of the system.

[0036] Significance: To avoid distortion of subsequent test data due to initial gaps or systematic errors.

[0037] Phase Two: Formal Loading

[0038] Objective: To apply the main load to the specimen according to a preset loading curve (such as linear, stepped, or sine wave) and record the deformation, stress, strain, and other parameters of the specimen.

[0039] Loading method: Depending on the test requirements, it can be static loading (such as constant load), dynamic loading (such as cyclic load) or mixed loading.

[0040] Significance: It allows for the direct acquisition of performance data of specimens under major stress conditions, such as elastic modulus, yield strength, and fatigue life.

[0041] Phase 3: Destructive Loading

[0042] Objective: To continue increasing the load until the specimen fails, and to record the failure load and failure mode (such as fracture, buckling, plastic deformation).

[0043] Loading method: Usually, the specimen is loaded at a relatively fast rate until it completely fails.

[0044] Significance: To evaluate the ultimate load-bearing capacity of specimens and provide a basis for material improvement or structural design.

[0045] The above embodiments are only used to illustrate the technical methods of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of this utility model without departing from the spirit and scope of the technical methods of this utility model.

Claims

1. A test bench for loading loads in three stages, comprising a platform (1), characterized in that, A fixing frame (2) is provided on the platform (1); Two support seats (3) are installed on the top of the platform (1). The two support seats (3) are used to install the anti-roll torsion bar (4). A movable motion rod mechanism (5) is provided above the platform (1). The motion rod mechanism (5) is used for fatigue testing of the anti-roll torsion bar (4).

2. The test bench for three-stage loading according to claim 1, characterized in that, The platform (1) is fixedly connected to a base (6), and a rotatable rotating frame (7) is provided on the base (6).

3. The test bench for three-stage loading according to claim 2, characterized in that, The motion lever mechanism (5) consists of a first link (51) and a second link (52), and a force sensor (53) is provided on the first link (51).

4. The test bench for three-stage loading according to claim 3, characterized in that, Both connecting rod one (51) and connecting rod two (52) are hinged to the rotating frame (7), and connecting rod one (51) and connecting rod two (52) are located on both sides of the bottom of the rotating frame (7).

5. The test bench for three-stage loading according to claim 3, characterized in that, Both connecting rod one (51) and connecting rod two (52) are rotatably connected to the anti-roll torsion bar (4).

6. The test bench for three-stage loading according to claim 2, characterized in that, There are two fixing frames (2), and a crossbeam (8) is provided between the two fixing frames (2).

7. The test bench for three-stage load loading according to claim 6, characterized in that, A hydraulic cylinder (9) is mounted on the crossbeam (8), and a connecting rod (10) is mounted on the hydraulic cylinder (9).

8. The test bench for three-stage loading according to claim 7, characterized in that, The connecting rod 3 (10) is hinged to the rotating frame (7).

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