A crash test bench for anti-collision beams

Abstract

This utility model discloses a crash test bench for anti-collision beams, relating to the field of anti-collision beam crash test technology. It includes: a support structure comprising a workbench and a support frame disposed on the upper part of the workbench; the support frame includes a vertical frame and upper and lower crossbeams disposed at the upper and lower ends of the vertical frame; the lower crossbeam is disposed below the workbench; a crash loading structure comprising a thrust cylinder fixedly disposed on the upper crossbeam, the lower end of the thrust cylinder's push rod extending through the upper crossbeam to the lower part of the upper crossbeam, and a pressure head disposed at the lower end of the push rod; a detection structure comprising a spoke-type tension / compression sensor disposed between the push rod and the pressure head; and a support structure comprising two sets of support bodies symmetrically disposed on the workbench, the upper part of which is provided with a support cylinder that abuts against and supports the lower side of the anti-collision beam. This invention solves the technical problems of poor accuracy and high loading difficulty in existing crash test benches for anti-collision beam testing.

Description

Technical Field

[0001] This utility model relates to the field of metal compression and torsion testing technology, specifically to a crash test bench for anti-collision beams. Background Technology

[0002] Automotive crash beams are key energy-absorbing components in a vehicle's passive safety system. During a collision, they absorb impact energy through crushing deformation, playing a crucial role in protecting the safety of occupants. Therefore, in the research, development, and quality control stages of crash beam production, precise testing and evaluation of key mechanical indicators such as crush resistance and energy absorption characteristics are necessary.

[0003] To meet the testing needs of various automotive parts and components, the industry has developed a variety of pressure testing equipment. Among them, patent CN 116519483 A discloses a large long-column pressure testing system with an upper-mounted hydraulic cylinder. This system uses a lifting motor to control the raising and lowering of an upper-mounted hydraulic cylinder on four lead screws, and then uses a pressure plate on the cylinder to press the parts. A motor-driven crossbeam lifting and adjusting mechanism moves along the lead screws to adjust the height of the hydraulic cylinder, while the actual crushing force is generated by the hydraulic cylinder. However, under the condition of applying huge loads in crush tests, the transmission system composed of the lifting motor, reducer, and lead screw nut pair may experience transmission clearances and elastic deformations that can produce small, unexpected displacements or vibrations under huge reaction forces. This instability directly interferes with the force sensor measurements, leading to data fluctuations and distortions, failing to meet the stringent requirements of high-precision testing for loading stability. Meanwhile, the gantry frame, which is achieved through four lead screws or support rods, has a relatively compact and enclosed structure to ensure stability, which restricts the loading path and activity space for operators. The car anti-collision beam is not only large in size, but also usually weighs tens of kilograms. It is very difficult for operators to pass the anti-collision beam through the narrow frame space, making loading difficult. Utility Model Content

[0004] The purpose of this utility model is to provide a crash test bench for anti-collision beams, so as to solve the problems of instability and unreliable data during loading and testing of existing crash test benches for anti-collision beams as mentioned in the background art, and at the same time solve the problem of high difficulty in loading anti-collision beams.

[0005] To solve the above-mentioned technical problems, this utility model provides a crash test bench for anti-collision beams, comprising: A support structure includes a workbench and a support frame disposed on the upper part of the workbench. The support frame includes an upright and an upper crossbeam and a lower crossbeam disposed at the upper and lower ends of the upright. The lower crossbeam is disposed below the workbench. A crushing loading structure includes a thrust cylinder, which is fixedly mounted on the upper crossbeam. The lower end of the push rod of the thrust cylinder passes through the upper crossbeam and extends to the lower part of the upper crossbeam. The lower end of the push rod is provided with a pressure head. The detection structure includes a spoke-type tension / compression sensor, which is disposed between the push rod and the pressure head; The support structure includes two sets of support bodies, which are symmetrically arranged on the workbench. The upper part of each support body is provided with a support cylinder that abuts and supports the lower side of the anti-collision beam.

[0006] Based on the above technical solution, the present invention is further described as follows: the pressure head is provided with a semi-circular crushing surface.

[0007] As a further optimization of this utility model, the support body includes a base, on which a plurality of support plates are arranged in an array, the lower end of the support plate is fixed to the upper side of the base, and the upper end of the support plate is provided with a horizontally arranged support cylinder.

[0008] As a further optimization of this utility model, an auxiliary structure is also included, the auxiliary structure comprising: The sliding assembly includes a guide rail disposed on the worktable and a slide module slidably disposed on the guide rail, wherein the extension direction of the guide rail is consistent with the symmetrical arrangement direction of the two sets of bases. A lifting assembly is disposed on the slide module, and the movable end of the lifting assembly is provided with a connecting seat; A rotating support roller is disposed on the connecting seat of the lifting assembly, and the rotating support roller slides and abuts against the lower side of the anti-collision beam. The lifting assembly drives the rotating support roller to move up and down to raise the lower side of the end of the anti-collision beam to a height higher than the upper side of the support cylinder.

[0009] As a further optimization of this utility model, the sliding component is provided in two sets, respectively disposed on both sides of the base, and the auxiliary structure further includes a feeding guide structure, which includes: A connecting frame, the two ends of which are respectively connected to the connecting seats of the two sets of lifting components; A guide is provided on the connecting frame, and the inner side of the guide is provided with a bent portion adapted to the end of the anti-collision beam, the bent portion abutting and cooperating with the end of the anti-collision beam.

[0010] As a further optimization of this utility model, the outer side of the front end of the guide is provided with an inclined guide portion.

[0011] As a further optimization of this utility model, a control structure is also included, which is connected to the detection structure and the thrust cylinder respectively.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This invention provides a rigid load-bearing frame and a defined test space for the entire device through a support structure, ensuring the overall stability of the test platform under heavy loads. It also achieves stable force application to the crash beam through a crushing loading structure, outputting controllable loading force according to test requirements. Simultaneously, its designed indenter adapts to the curved structure of the crash beam, ensuring the transmission of loading force and simulated crushing, avoiding localized stress concentration, and guaranteeing the stability of the crash beam under load. Furthermore, the support structure provides support and flexible lifting for the ends of the crash beam, simplifying the loading operation and significantly reducing the difficulty of manual handling and loading. Finally, the detection structure directly detects the axial load on the crash beam, avoiding hydraulic pressure conversion errors, providing real-time measurement signals and high measurement accuracy. With the help of closed-loop control of the control structure, automated control of the loading process and real-time processing of test data can be achieved.

[0013] This has resulted in a complete testing platform that integrates stable support, precise loading, real-time detection, and convenient adaptation. It not only solves the problems of traditional test benches being prone to deformation and shaking under heavy loads and inaccurate force detection, but also simplifies the loading operation and expands the adaptation range through auxiliary structures, allowing it to be adapted to anti-collision beams of different specifications to complete crush performance testing. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure of a crash test bench with a crash beam. Figure 2 This is a side view schematic diagram of a crash test bench for anti-collision beams; Figure 3 A schematic diagram of the auxiliary structure of a crash test bench for anti-collision beams; Figure 4 This is a schematic diagram of the auxiliary structure of a crash test bench for anti-collision beams; Figure 5 This is a side view of the auxiliary structure of an anti-collision beam crush test bench.

[0015] In the diagram: 1-Support structure, 11-Workbench, 111-Base, 12-Support frame, 121-Upright frame, 122-Upper crossbeam, 123-Lower crossbeam, 124-Support rod. 2- Crushing loading structure, 21- Thrust cylinder, 22- Pressure head, 3-Detection structure, 31-Spoke-type tension / compression sensor, 4-Support structure, 41-Support body, 411-Base, 412-Support plate, 413-Support cylinder 5-Auxiliary structure, 51-Sliding component, 511-Guide rail, 512-Slide table module, 52-Lifting component, 521-Connecting seat, 53-Rotating support roller, 54-Feeding guide structure, 541-Connecting frame, 542-Guide component. Detailed Implementation

[0016] 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.

[0017] Please see Figures 1-5 This invention provides a crash beam crushing test bench, comprising a support structure 1, a crushing loading structure 2, a detection structure 3, a support structure 4, and an auxiliary structure 5. The support structure 1 provides a rigid load-bearing frame and a defined test space for the entire device, ensuring the overall stability of the test platform under heavy loads. The crushing loading structure 2 applies stable force to the crash beam, outputting controllable loading force according to test requirements. Its designed indenter 22 adapts to the curved structure of the crash beam, ensuring the transmission of loading force and simulating crushing, avoiding local stress concentration, and ensuring the stability of the crash beam under load. The support structure 4 supports and flexibly lifts the ends of the crash beam, simplifying the loading operation and reducing loading difficulty. The detection structure 3 directly detects the axial load on the crash beam, avoiding hydraulic pressure conversion errors, providing real-time measurement signals and high measurement accuracy. With the help of closed-loop control of the control structure, automated control of the loading process and real-time processing of test data can be achieved.

[0018] For details, please refer to the appendix. Figure 1 and attached Figure 2The support structure 1 includes a workbench 11 and a support frame 12 disposed on the upper part of the workbench 11. The workbench 11 is a rectangular support platform with a base 111 at its bottom, which can be integrally cast from cast iron or welded from thick steel plates, but is not limited to this type. The support frame 12 includes an upright frame 121 and an upper crossbeam 122 and a lower crossbeam 123 disposed at the upper and lower ends of the upright frame 121. The lower crossbeam 123 is disposed below the workbench 11 and is fixed to the base 111. The upright frame 121 includes four sets of support rods. 124, the support rod 124 may be, but is not limited to, a solid alloy rod. The support rod 124 is arranged in a rectangular array. The lower end of the support rod 124 passes through the worktable 11 and the lower crossbeam 123. Both the upper and lower ends of the support rod 124 are threaded. The upper end and the lower end of the support rod 124 pass through the upper crossbeam 122 and the lower crossbeam 123 respectively and are tightened and fixed with nuts. In this way, the load force is transmitted from the support rod 124 to the lower crossbeam 123 and then to the base 111, avoiding the load from acting directly on the worktable 11 and affecting its planar accuracy.

[0019] Please refer to the attached document. Figure 1 and attached Figure 2 The crushing loading structure 2 includes a thrust cylinder 21, which is fixedly mounted on the upper crossbeam 122. The lower end of the push rod of the thrust cylinder 21 passes through the upper crossbeam 122 and extends to the lower part of the upper crossbeam 122. The axis of the push rod of the thrust cylinder 21 is aligned with the center of the worktable 11 to achieve vertical transmission of the loading force. In this embodiment, the thrust cylinder 21 may be, but is not limited to, a servo-controlled hydraulic cylinder, which is equipped with a servo pump. The servo pump is connected to the control structure to achieve precise control of the push rod displacement, speed, and output force. The lower end of the push rod is provided with a pressure head 22, and the lower end of the pressure head 22 is provided with a crushing surface that contacts the upper surface of the anti-collision beam. The crushing surface is a semi-circular structure. The pressure head 22 is detachably installed, and its model and arc radius are determined according to the arc parameters of different anti-collision beams to improve the realism and adaptability of the loading method and improve the simulation degree of the crushing test.

[0020] Please continue to refer to the appendix. Figure 1 and attached Figure 2The detection structure 3 includes a spoke-type tension / compression sensor 31, which is disposed between the push rod and the pressure head 22. Specifically, the upper end of the spoke-type tension / compression sensor 31 is rigidly connected to the end of the cylinder push rod by a thread, and the lower end of the spoke-type tension / compression sensor 31 is fixedly connected to the upper end of the pressure head 22 by multiple bolts. This ensures that the spoke-type tension / compression sensor 31 is in the main transmission path of the entire loading force, ensuring that the spoke-type tension / compression sensor 31 directly and without interference measures the actual force applied to the anti-collision beam, effectively eliminating measurement errors that may be caused by factors such as internal friction of the cylinder.

[0021] Please refer to the attached document. Figure 1 and attached Figure 2 The support structure 4 includes two sets of support bodies 41, which are symmetrically arranged on the workbench 11. Each support body 41 includes a base 411, the lower end of which is fixed to the workbench 11 by bolts. Several sets of support plates 412 are arranged in an array on the upper end of the base 411. The lower end of each support plate 412 is fixed to the upper side of the base 411. The upper ends of the support plates 412 together support a horizontal support column 413 that abuts against the lower side of the anti-collision beam, thereby forming a hinged support.

[0022] Please refer to the attached document. Figure 3 and attached Figure 4 The auxiliary structure 5 includes a sliding component 51, a lifting component 52, a rotating support roller 53, and a feeding guide structure 54. Specifically, the sliding component 51 includes a linear guide rail 511 disposed on the worktable 11 and a sliding table module 512 slidably disposed on the guide rail 511. In this embodiment, the extension direction of the guide rail 511 is consistent with the symmetrical arrangement direction of the two sets of bases 411. Two sets of guide rails 511 are provided, respectively arranged on the outer side of the two side support bodies 41, forming two linear guide structures parallel to the axis of the anti-collision beam. The sliding table modules 512 on the two sets of guide rails 511 slide synchronously.

[0023] Please continue to refer to the appendix. Figure 3 Appendix Figure 4 and attached Figure 5The lifting assembly 52 is mounted on the slide module 512 and is used to lift the end of the anti-collision beam. Specifically, the lifting assembly 52 can be, but is not limited to, an electric push rod, a pneumatic push rod, or a hydraulic cylinder. The lower end of the lifting assembly 52 is fixed to the slide module 512. The movable upper end of the lifting assembly 52 is provided with a connecting seat 521. The connecting seat 521 includes a fixed plate, and a bearing seat is provided on the fixed plate. The rotating support roller 53 is rotatably mounted on the bearing seats of the two sets of connecting seats 521. The rotating support roller 53 slides and abuts against the lower side of the anti-collision beam. Because the closed frame of the support structure 1 restricts the operating space, the operator needs to send the anti-collision beam from one side of the device to the other side horizontally. During the loading and movement of the anti-collision beam, without the support structure 1, its bottom will be suspended in the air, which is not conducive to smooth progress. The support roller 53 is used to support the lower surface of the anti-collision beam during the pushing process. The detection structure 3 also includes a displacement sensor, which is set on the slide module 512. When the slide module 512 is detected to move close to another support body 41, the control structure controls the lifting component 52 to start and cause the rotating support roller 53 to rise, so that the lower side of the front end of the anti-collision beam is raised to a height higher than the upper surface of the support cylinder 413. This makes it easier for the front end of the anti-collision beam to pass over the support cylinder 413 and fall smoothly onto the support body 41, realizing the smooth loading of the anti-collision beam in a limited space.

[0024] Please continue to refer to the appendix. Figure 4 and attached Figure 5 The feeding guide structure 54 includes a connecting frame 541 and a guide member 542. The connecting frame 541 is configured as a portal frame, with its two ends respectively connected to the connecting seats 521 of the two sets of lifting components 52, thereby achieving the load-bearing function of synchronous lifting with the connecting seats 521. The guide member 542 is fixedly disposed in the middle of the connecting frame 541, with the middle of the connecting frame 541 located in front of the support body 41 in the direction of the anti-collision beam's extension. The inner side of the guide member 542 is provided with a bent portion adapted to the end of the anti-collision beam, and the bent portion abuts against the corner of the lower side of the end of the anti-collision beam. In this embodiment, the guide member 542... The component 542 is configured as a vertically installed baffle. The lower end of the baffle is fixedly connected to the middle of the connecting frame 541. The connection method can be bolt fixing or direct integral molding with the connecting frame 541. The lower end of the baffle and the connecting frame 541 form a bend in the shape of a corner. The guide component 542 forms a locking limit cooperation with the end of the anti-collision beam to realize the movement of the slide module 512 during the extension of the anti-collision beam. At the same time, the outer side of the front end of the guide component 542 is provided with an inclined guide part to guide the connecting frame 541 to smoothly pass through the support column 413 above the support body 41, thereby effectively avoiding rigid impact.

[0025] A control structure is provided, which is connected to the detection structure 3 and the thrust cylinder 21 respectively. This control structure is used to control the extension and retraction of the thrust cylinder 21 in the crushing loading structure 2 and the lifting assembly 52 in the auxiliary structure 5, thereby achieving automated adjustment of the main loading process and the auxiliary feeding process.

[0026] Specifically, the control structure includes an electronic control module, a control panel, and a touchscreen. The electronic control module includes a power supply unit and a main control module connected by a circuit. The power supply unit can use, but is not limited to, an industrial power supply, to provide a stable power source for the entire control structure. The main control module can be, but is not limited to, a Siemens S7-1200 series PLC controller. The control output terminal of the main control module is connected to the input terminal of a relay via a circuit. The output terminal of the relay is connected to the servo pump of the thrust cylinder 21 in the crushing loading structure 2, the drive motor of the lifting assembly 52, and the display terminal of the touch screen via a circuit. The control panel and the touch terminal of the touch screen are also connected to the control input terminal of the main control module via a circuit. At the same time, the signal output terminals of the spoke-type tension and compression sensor 31 and the displacement sensor in the detection structure 3 are connected to the signal input terminal of the main control module via a cable or wireless module. This is to realize the automated operation control of the overall architecture of anti-collision beam feeding, crushing loading, data acquisition and processing by inputting control commands through the control panel or touch screen, receiving the force value signal of the spoke-type tension and compression sensor 31 in real time and forming a closed-loop control.

[0027] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A crash test bench for anti-collision beams, characterized in that, include: The support structure (1) includes a workbench (11) and a support frame (12) disposed on the upper part of the workbench (11). The support frame (12) includes an upright (121) and an upper crossbeam (122) and a lower crossbeam (123) disposed at the upper and lower ends of the upright (121). The lower crossbeam (123) is disposed below the workbench (11). The crushing loading structure (2) includes a thrust cylinder (21), which is fixedly mounted on the upper crossbeam (122). The lower end of the push rod of the thrust cylinder (21) passes through the upper crossbeam (122) and extends into the lower part of the upper crossbeam (122). The lower end of the push rod is provided with a pressure head (22). The detection structure (3) includes a spoke-type tension and compression sensor (31), which is disposed between the push rod of the thrust cylinder (21) and the pressure head (22); The support structure (4) includes two sets of support bodies (41), which are symmetrically arranged on the workbench (11). The upper part of the support body (41) is provided with a support cylinder (413) that abuts and supports the lower side of the anti-collision beam.

2. The anti-collision beam crush test bench according to claim 1, characterized in that, The pressure head (22) is provided with a semi-circular crushing surface.

3. The anti-collision beam crush test bench according to claim 2, characterized in that, The support body (41) includes a base (411), on which a plurality of support plates (412) are arranged in an array. The lower end of the support plate (412) is fixed to the upper side of the base (411), and the upper end of the support plate (412) is provided with a horizontally arranged support cylinder (413).

4. The anti-collision beam crush test bench according to claim 3, characterized in that, It also includes an auxiliary structure (5), which includes: The sliding assembly (51) includes a guide rail (511) disposed on the worktable (11) and a slide module (512) slidably disposed on the guide rail (511). The extension direction of the guide rail (511) is consistent with the symmetrical arrangement direction of the two sets of bases (411). A lifting assembly (52) is provided on the slide module (512), and a connecting seat (521) is provided at the movable end of the lifting assembly (52). A rotating support roller (53) is provided on the connecting seat (521) of the lifting assembly (52), and the rotating support roller (53) slides and abuts against the lower side of the anti-collision beam; The lifting assembly (52) drives the rotating support roller (53) to move up and down to raise the lower side of the end of the anti-collision beam to a height higher than the upper side of the support cylinder (413).

5. The anti-collision beam crush test bench according to claim 4, characterized in that, The sliding component (51) is provided in two sets, and is respectively provided on both sides of the base (411); The auxiliary structure (5) further includes a feeding guide structure (54), which includes: A connecting frame (541) is provided, with its two ends connected to the connecting seats (521) of the two sets of lifting components (52), respectively. A guide (542) is provided on the connecting frame (541), and the inner side of the guide (542) is provided with a bent portion adapted to the end of the anti-collision beam, the bent portion abutting and cooperating with the end of the anti-collision beam.

6. The anti-collision beam crush test bench according to claim 5, characterized in that, An inclined guide portion is provided on the outer side of the front end of the guide (542).

7. The anti-collision beam crush test bench according to claim 1, characterized in that, It also includes a control structure, which is connected to the detection structure (3) and the thrust cylinder (21) respectively.

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