A fuel tank strength testing device

Abstract

The utility model discloses a kind of fuel tank strength testing devices, belong to strength test field. Including clamping assembly, the clamping assembly includes frame base, limit strip is installed on two side edge positions of frame base, positioning part is installed between two groups of limit strip, clamping part is installed between two groups of limit strip, drive part is provided at the bottom of frame base;Test component, test component is used to impact test to the side edge of fuel tank;Limiting component, limiting component includes the shielding part for covering test area, fixed part is installed on the shielding part for clamping fuel tank, and the pressing part for pressing fuel tank is connected on the shielding part. A kind of fuel tank strength testing device of the application, by clamping, test, limiting component cooperation, positioning part is firmly clamped fuel tank from multidirectional, test component controls impact parameter, all-around limit displacement, impact point precision is kept, data accuracy is proposed.

Description

Technical Field

[0001] This utility model relates to the field of strength testing technology, and in particular to a fuel tank strength testing device. Background Technology

[0002] As a critical component of automobiles, construction machinery, and other equipment, the structural strength of fuel tanks directly affects operational safety. Especially when subjected to external forces such as impacts and compression, they must possess sufficient resistance to deformation and rupture to prevent fuel leaks from causing fires, explosions, and other hazards. Therefore, rigorous strength testing of fuel tanks is a necessary step before products leave the factory, with impact resistance testing and static pressure strength testing being core components for evaluating their mechanical properties.

[0003] Existing devices often use simple single-sided limiting or clamping methods to fix the fuel tank, such as using a rigid baffle to limit one side of the fuel tank, leaving the other side exposed as the testing surface. However, in actual vehicles, the fuel tank is usually rigidly connected to the vehicle body bracket by multiple bolts, and the bracket often uses rubber buffers to achieve multi-directional elastic restraint to adapt to vibrations and bumps during vehicle operation. This difference in fixing methods leads to a significant deviation between the stress state and deformation path of the fuel tank during testing and the actual usage scenario, making it difficult for the test results to truly reflect its strength performance in the vehicle.

[0004] In impact resistance testing, existing devices often employ a hinged drop hammer method: the drop hammer rotates around the hinge point to a preset angle and then releases, impacting the fuel tank test surface. However, since the fuel tank is only fixed by a single-sided limit, the enormous impact force generated at the moment of impact can easily cause unexpected displacement or tilting of the fuel tank, making the impact point deviate from the preset position and affecting the accuracy of the test data. Therefore, a fuel tank strength testing device needs to be designed.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Utility Model Content

[0006] This utility model provides a fuel tank strength testing device to solve the problem that existing devices use a hinged drop hammer to swing and impact the fuel tank. Because the device is only fixed on one side, the fuel tank is prone to displacement and tilting during the impact, causing the impact point to deviate and affecting the accuracy of the data.

[0007] This utility model embodiment adopts the following technical solution: a fuel tank strength testing device. It mainly includes a clamping assembly, which includes a frame base. Limiting strips are installed on both sides of the frame base. A positioning part for limiting one side of the fuel tank is installed between two sets of limiting strips, and a clamping part for limiting the other side of the fuel tank is installed between the two sets of limiting strips. A driving part is provided at the bottom of the frame base for driving the clamping part closer to the positioning part to clamp the fuel tank. A testing assembly is disposed on the frame base and is used to perform an impact test on one side of the fuel tank. A limiting assembly is disposed on the clamping part, and the limiting assembly includes a shielding part for covering the test area, a fixing part for clamping the fuel tank is installed on the shielding part, and a pressing part for pressing the fuel tank is connected to the shielding part.

[0008] Furthermore, the positioning part includes a fixing plate that is slidably disposed between the two sets of limiting strips and fixed on the frame base. Vertically arranged limiting plates are installed on the fixing plate near the two sides. There is a gap between the two sets of limiting plates. The clamping part includes a movable plate that is slidably disposed between the two sets of limiting strips. A clamping plate is installed on the movable plate.

[0009] Furthermore, the drive unit includes a T-shaped rod installed between the bottom of the frame base and the fixed plate. Both ends of the T-shaped rod are equipped with protrusions. The T-shaped rod is connected to the bottom of the frame base and one side of the fixed plate through two sets of protrusions, respectively.

[0010] A lead screw is installed between the two sets of protruding seats via a bearing. A sliding seat is threaded onto the lead screw, which is slidably mounted on the T-shaped rod. The lead screw passes through one end of one set of protruding seats and is mounted on a turntable. The sliding seat is connected to the movable plate.

[0011] Furthermore, the shielding part includes a protective cover mounted on the movable plate. The protective cover consists of two sets of groove rods and cover plates. The groove rods provide mounting tracks and support for the cover plates. The cover plates are adapted to the shape and position of the clamping plate and tightly cover the clamping plate to form preliminary protection for the clamping area.

[0012] Two sets of side baffles are installed on the fixed plate. Each side baffle consists of a set of groove rods and a cover plate. The groove rods provide the mounting base for the cover plate. The cover plate covers the limiting plate. The groove rods of the protective cover and the groove rods of the side baffle are arranged opposite to each other, and the two are reserved with a sliding space. The cover plate slides between the two sets of opposite groove rods.

[0013] Furthermore, the fixing part includes a mounting seat installed on the outside of the cover plate three, a screw threadedly connected to the mounting seat, the screw passing through the cover plate three and connected to a clamping block, and an anti-slip pad provided in the contact area between the clamping block and the fuel tank;

[0014] The pressing part includes a horizontal bar, the two ends of which are fixed to two sets of cover plates three by clamps. The clamps are installed on the two sets of cover plates three. Two sets of limiting rods are movably passed through the horizontal bar. One end of the limiting rod extends downward to form a raised step. A cover is sleeved on the raised step. A spring is sleeved on the limiting rod. One end of the spring is connected to the raised step, and the other end abuts against the bottom surface of the horizontal bar.

[0015] Furthermore, the test component includes a support frame mounted on the frame base. The support frame has an outwardly protruding support end, on which a cylinder is mounted. The telescopic end of the cylinder passes through the support end and is connected to a support plate. A support bar is mounted on the bottom surface of the support plate. A fixed frame is mounted on the support bar near one end. A movable frame is movably connected to the fixed frame. The movable frame is movably connected to the fixed frame via a pivot.

[0016] Furthermore, an angle plate is installed on the side of the fixed frame, the angle plate is coaxially sleeved on the rotating shaft, the angle plate has a through hole adapted to the rotating shaft, the scale on the surface of the angle plate is matched with the pointer at one end of the rotating shaft, a drop hammer is installed at one end of the movable frame, and a controller is installed on the support frame.

[0017] The above-mentioned technical solutions adopted in the embodiments of this utility model can achieve the following beneficial effects:

[0018] A fuel tank strength testing device utilizes a clamping assembly where a positioning part, a clamping part, and a driving part work together to form a stable clamp from both sides and the bottom, simulating multi-directional constraints during actual installation. The testing assembly uses cylinders and angle discs to precisely control the impact parameters of the falling hammer, ensuring test consistency. The limiting assembly's shielding part, fixing part, and pressing part further reinforce the fuel tank from protective, side-clamping, and top-pressing dimensions, comprehensively limiting fuel tank displacement. This multi-structure collaboration stably fixes the fuel tank, preventing unexpected displacement or tilting during impact, ensuring precise impact point accuracy, and improving the accuracy of test data. Attached Figure Description

[0019] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0020] In the attached diagram:

[0021] Figure 1This is an overall schematic diagram of a fuel tank strength testing device according to this application;

[0022] Figure 2 for Figure 1 Exploded view;

[0023] Figure 3 for Figure 2 Enlarged view of point A;

[0024] Figure 4 for Figure 2 Enlarged view of point B;

[0025] Figure 5 for Figure 2 A schematic diagram of the bottom structure;

[0026] Figure 6 for Figure 5 Enlarged view of point C;

[0027] Figure label:

[0028] 1. Clamping assembly; 11. Frame base; 12. Limiting strip; 13. Fixing plate; 14. Limiting plate; 15. T-shaped rod; 16. Protruding seat; 17. Lead screw; 18. Movable plate; 19. Clamping plate; 110. Turntable; 111. Sliding seat; 2. Test assembly; 21. Support frame; 22. Cylinder; 23. Support plate; 24. Supporting strip; 25. Fixing frame; 26. Movable frame; 27. Angle plate; 28. Rotating shaft; 29. ​​Pointer; 210. Drop hammer; 3. Limiting assembly; 31. Protective cover; 32. Side baffle; 33. Mounting seat; 34. Screw; 35. Clamping block; 36. Horizontal bar; 37. Clip; 38. Limiting rod; 39. Spring; 310. Shield; 311. Cover plate three; 4. Controller. Detailed Implementation

[0029] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0030] The technical solutions provided by the various embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0031] Reference Figures 1-6As shown, this utility model embodiment provides a fuel tank strength testing device, including a clamping assembly 1. The clamping assembly 1 includes a frame base 11, which is through-shaped at the center of the frame base 11. Limiting strips 12 are fixedly installed on the frame base 11 near both sides. The limiting strips 12 are inverted L-shaped structures. A positioning part for limiting one side of the fuel tank is installed between the two sets of limiting strips 12. The positioning parts of the two sets of limiting strips 12 provide guidance.

[0032] The positioning part includes a fixing plate 13 that is slidably disposed between two sets of limiting strips 12 and fixed to the frame base 11 by fasteners. The fixing plate 13 can be flexibly adjusted according to the size of the fuel tank. Vertically arranged limiting plates 14 are fixedly installed on the fixing plate 13 near the two sides. There is a gap between the two sets of limiting plates 14.

[0033] Furthermore, a clamping part for limiting the other side of the fuel tank is installed between the two sets of limiting bars 12. The clamping part includes a movable plate 18 that is slidably disposed between the two sets of limiting bars 12. The movable plate 18 can move along the direction of the limiting bars 12. A clamping plate 19 is fixedly installed on the movable plate 18. At the same time, a driving part for driving the clamping plate 19 to approach the limiting plate 14 to clamp the fuel tank is provided between the bottom of the frame base 11 and the fixed plate 13. The driving part includes a T-shaped rod 15 fixedly installed between the bottom of the frame base 11 and the fixed plate 13. Protrusions 16 are fixedly installed at both ends of the T-shaped rod 15. The T-shaped rod 15 is connected to the bottom of the frame base 11 and one side of the fixed plate 13 through two sets of protrusions 16 respectively.

[0034] Meanwhile, a lead screw 17 is installed through a bearing between the two sets of protruding seats 16, and a sliding seat 111 is threaded onto the lead screw 17. The sliding seat 111 is also slidably mounted on the T-shaped rod 15. A turntable 110 is fixedly installed at one end of the lead screw 17 that passes through a set of protruding seats 16. The turntable 110 facilitates the rotation of the lead screw 17. At the same time, the sliding seat 111 is connected to the movable plate 18. When the turntable 110 is rotated, the lead screw 17 drives the sliding seat 111 to slide along the T-shaped rod 15. The sliding seat 111 is connected to the movable plate 18, thereby driving the clamping plate 19 to approach the limiting plate 14, so as to clamp and fix the fuel tank. The clamping force and clamping position can be precisely controlled through the threaded transmission, which can adapt to the testing requirements of fuel tanks of different specifications.

[0035] Meanwhile, a test assembly 2 is installed on the frame base 11. The test assembly 2 includes a support frame 21 fixedly installed on the frame base 11. The support frame 21 has an outwardly protruding support end, and a cylinder 22 is fixedly installed on the support end. The telescopic end of the cylinder 22 passes through the support end and is fixedly connected to a support plate 23. When the cylinder 22 telescopically extends or retracts, it can drive the support plate 23 to move in the vertical direction. A support bar 24 is fixedly installed on the bottom surface of the support plate 23. A fixed frame 25 is fixedly installed on the support bar 24 near one end, and a movable frame 26 is movably connected to the fixed frame 25. The movable frame 26 is movably connected to the fixed frame 25 through a rotating shaft 28.

[0036] An angle plate 27 is fixedly installed on the side of the fixed frame 25. The angle plate 27 is coaxially sleeved on the rotating shaft 28. A through hole (not shown in the figure) adapted to the rotating shaft 28 is opened on the angle plate 27 to provide space for the rotation of the rotating shaft 28. The surface of the angle plate 27 is engraved with clear scale. With the help of the pointer 29 at one end of the rotating shaft 28, the rotation angle of the movable frame 26 can be read, which provides a basis for the quantification of the impact energy of the drop hammer. A drop hammer 210 for contact impact with the fuel tank is fixedly installed at one end of the movable frame 26. At the same time, a controller 4 is fixedly installed on the support frame 21. The controller 4 is used to control the operation of the above-mentioned equipment.

[0037] It should be noted that the controller 4 has a button to control the start or stop of the cylinder 22. When the end of the hammer 210 is roughly aligned with the center position of one side of the fuel tank by visual judgment, the button can be pressed to start or stop the cylinder 22.

[0038] In its initial state, the drop hammer 210 is vertically suspended, without interfering with the clamping assembly 1, ensuring the safety of the equipment during standby. During test startup, the controller 4 operates the cylinder 22, using the linear motion of the cylinder 22's extension and retraction end to move the support plate 23, support bar 24, and drop hammer 210 up and down as a whole. The operator visually adjusts the end of the drop hammer 210 to approximately align with the center of the side of the fuel tank. At this point, pressing the button on the controller 4 shuts off the cylinder 22, locking the vertical position of the drop hammer 210. Subsequently, the operator manually pulls the drop hammer 210, causing it to rotate and rise around the shaft 28. During this process, the pointer 29 rotates synchronously with the shaft 28, pointing to the corresponding mark on the angle dial 27. The operator can then precisely control the lifting angle of the drop hammer 210, thereby controlling the impact energy. When the restraint on the drop hammer 210 is released, the drop hammer 210 rotates along the axis of the rotating shaft 28 under the action of gravity torque, passes through the gap between the two sets of limit plates 14, and impacts one side of the fuel tank to simulate the external force impact in actual working conditions and complete the strength test.

[0039] To maintain stability during fuel tank testing, such as Figures 1-3As shown, a limiting component 3 is provided on the movable plate 18. The limiting component 3 includes a shielding part for covering the test area. The shielding part includes a protective cover 31 fixedly installed on the movable plate 18 by fasteners. The protective cover 31 consists of two sets of groove rods and cover plates. The groove rods provide the mounting track and support for the cover plates. The cover plates are adapted to the shape and position of the clamping plate 19 and tightly cover the clamping plate 19 to form preliminary protection for the clamping area. At the same time, two sets of side baffles 32 are fixedly installed on the fixed plate 13 by fasteners. The side baffles 32 consist of a set of groove rods and cover plates. The groove rods provide the mounting base for the cover plates. The cover plates cover the limiting plate 14 and protect the limiting area from one side of the fixed plate 13. Together with the protective cover 31, they form an outer protective frame around the fuel tank test area, initially limiting the unexpected displacement of the fuel tank and surrounding components.

[0040] Specifically, considering the different sizes of fuel tanks, the limiting component 3 is structurally adaptable. The first groove of the protective cover 31 and the second groove of the side baffle 32 are arranged opposite each other, with reserved sliding space between them. When replacing fuel tanks of different sizes, the cover plate 311 can be slidably inserted between the two sets of opposite grooves according to its actual width. The cover plate 311 can slide and be inserted flexibly along the track of the grooves. By adjusting its position and coverage length between the grooves, it fills the protective gap caused by changes in fuel tank size, ensuring that regardless of how the fuel tank size is adjusted, the shielding part can completely cover the perimeter of the test area, further constraining the displacement space of the fuel tank during the test and enhancing test stability.

[0041] Furthermore, a fixing part for clamping the fuel tank is installed on both sets of oppositely arranged cover plates 311. The fixing part includes a mounting seat 33 fixedly installed on the outside of the cover plate 311. A screw 34 is threadedly connected to the mounting seat 33. The screw 34 passes through the cover plate 311 and is fixedly connected to a clamping block 35. An anti-slip pad is provided in the contact area between the clamping block 35 and the fuel tank. The anti-slip pad is made of a material with a high coefficient of friction, such as rubber, which can increase the friction with the surface of the fuel tank and prevent the fuel tank from sliding during clamping, and also avoid damage to the surface of the fuel tank caused by rigid contact.

[0042] Before testing, the operator rotates screw 34 and uses the principle of threaded transmission to precisely control clamping block 35 to approach the fuel tank, applying clamping force from the side of the fuel tank. This simulates the constraint state of the fuel tank when it is fixed and installed with bolts in real life from multiple angles, making the fuel tank more closely resemble the fixed force situation in actual use during the test. This greatly improves the stability during the test and allows the data obtained from impact tests and other processes to more accurately reflect the strength performance of the fuel tank when it is actually installed and impacted, providing a more reliable test basis for the performance evaluation of the fuel tank.

[0043] To further strengthen the stable constraint on the fuel tank, a pressing part is connected to the two sets of oppositely arranged cover plates 311. The pressing part includes a horizontal bar 36, the two ends of which are fixed to the two sets of cover plates 311 by a sleeve 37. The sleeve 37 is fixed to the two sets of cover plates 311 by fasteners. Two sets of limiting rods 38 are movably inserted through the horizontal bar 36. One end of the limiting rod 38 extends downward to form a raised step. This step serves as the contact part with the fuel tank. It not only has an anti-slip pad at the contact position to increase the friction with the surface of the fuel tank and prevent slippage during pressing, but also has a spring 39 sleeved on the limiting rod 38. One end of the spring 39 is connected to the raised step, and the other end abuts against the bottom surface of the horizontal bar 36. A cover 310 is sleeved on the raised step to protect the spring 39 sleeved on the limiting rod 38. This prevents the spring 39 from being affected by fuel tank debris, oil stains, etc. during the test, thus affecting its elastic performance. It also prevents the spring 39 from accidentally popping out and causing safety hazards.

[0044] Once the fuel tank is in place, the elastic force of spring 39 causes the raised step to press tightly against the surface of the fuel tank, applying a continuous and stable holding force from above. This, together with the side fixing parts, forms a multi-directional constraint system, simulating the multi-directional fixing of the fuel tank by the vehicle body during actual installation. This significantly improves the stability of the fuel tank during testing, making the impact test data more consistent with the strength performance under real-world usage scenarios, and laying a solid structural foundation for fuel tank performance evaluation.

[0045] Working principle: First, the clamping assembly 1 is adjusted to fit the dimensions of the fuel tank. The sliding fixing plate 13 is moved to a suitable position and fixed to the frame base 11 with fasteners. The limiting plate 14 on the fixing plate 13 initially defines the position of one side of the fuel tank. Then, the turntable 110 of the drive unit is rotated, and the lead screw 17 rotates to drive the sliding seat 111 to slide along the T-shaped rod 15, thereby pushing the movable plate 18 and the clamping plate 19 closer to the limiting plate 14, initially clamping the fuel tank from the other side. Next, according to the width of the fuel tank, the cover plate 311 is slid into the slotted rod 1 and slotted rod 2 to fill the protective gap; then, the screw 34 of the fixing unit is rotated to make the clamping block 35 clamp the fuel tank from the side, while the elastic force of the spring 39 of the pressing part causes the protruding step to press the fuel tank from above, forming a multi-directional constraint system, completing the stable clamping of the fuel tank, simulating the actual installation conditions.

[0046] The controller 4 activates cylinder 22 of test component 2, causing the extension and retraction of cylinder 22 to move the support plate 23, support bar 24, and drop hammer 210 up and down as a whole. The operator visually adjusts the end of drop hammer 210 to align with the center of the fuel tank test surface, presses the button to shut off cylinder 22, and locks the vertical position of drop hammer 210. Then, the operator manually pulls drop hammer 210 to rotate and lift it around shaft 28. Using angle dial 27 and pointer 29, the lifting angle of drop hammer 210 is controlled to set the impact energy, preparing for simulating external impacts of different intensities.

[0047] After the restraints on the drop hammer 210 are released, the drop hammer 210 rotates along the axis of rotation 28 under the action of gravitational torque, passes through the gap between the two sets of limiting plates 14, and impacts the test surface of the fuel tank. At this time, the multi-directional constraints of the clamping assembly 1 ensure the stability of the fuel tank, simulating the external force impact scenario in actual working conditions. After the impact, the above process can be repeated according to the test requirements to obtain reliable data for evaluating the strength performance of the fuel tank under impact and determining whether it meets the safety requirements.

[0048] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A fuel tank strength testing device, characterized in that: include The clamping assembly (1) includes a frame base (11), with limit strips (12) installed on both sides of the frame base (11), a positioning part for limiting one side of the fuel tank installed between the two sets of limit strips (12), and a clamping part for limiting the other side of the fuel tank installed between the two sets of limit strips (12). The bottom of the frame base (11) is provided with a driving part for driving the clamping part to approach the positioning part to clamp the fuel tank. Test component (2), which is mounted on the frame base (11), is used to perform an impact test on one side of the fuel tank; A limiting component (3) is disposed on the clamping part. The limiting component (3) includes a shielding part for covering the test area, a fixing part for clamping the fuel tank is installed on the shielding part, and a pressing part for pressing the fuel tank is connected to the shielding part.

2. The fuel tank strength testing device according to claim 1, characterized in that: The positioning part includes a fixing plate (13) that is slidably disposed between the two sets of limiting strips (12) and fixed on the frame base (11). A vertically arranged limiting plate (14) is installed on the fixing plate (13) near the two sides. There is a gap between the two sets of limiting plates (14). The clamping part includes a movable plate (18) that is slidably disposed between the two sets of limiting strips (12). A clamping plate (19) is installed on the movable plate (18).

3. The fuel tank strength testing device according to claim 2, characterized in that: The drive unit includes a T-shaped rod (15) installed between the bottom of the frame base (11) and the fixing plate (13). The two ends of the T-shaped rod (15) are equipped with protrusions (16). The T-shaped rod (15) is connected to the bottom of the frame base (11) and one side of the fixing plate (13) through two sets of protrusions (16). A lead screw (17) is installed between the two sets of protruding seats (16) through a bearing. A sliding seat (111) is threaded onto the lead screw (17). The sliding seat (111) is slidably mounted on the T-shaped rod (15). The lead screw (17) passes through one end of a set of protruding seats (16) and is mounted on a turntable (110). The sliding seat (111) is connected to the movable plate (18).

4. The fuel tank strength testing device according to claim 3, characterized in that: The shielding part includes a protective cover (31) installed on the movable plate (18). The protective cover (31) consists of two sets of groove rods and cover plates. The groove rods provide mounting tracks and support for the cover plates. The cover plates are adapted to the shape and position of the clamping plate (19) and tightly cover the clamping plate (19) to form preliminary protection for the clamping area. Two sets of side baffles (32) are installed on the fixed plate (13). The side baffles (32) consist of a set of groove rods and a cover plate. The groove rods provide the mounting base for the cover plate. The cover plate covers the limiting plate (14). The groove rods of the protective cover (31) and the groove rods of the side baffles (32) are arranged opposite to each other. The two are reserved with a sliding space. The cover plate (311) slides between the two sets of opposite groove rods.

5. The fuel tank strength testing device according to claim 4, characterized in that: The fixing part includes a mounting seat (33) installed on the outside of the cover plate three (311), a screw (34) is threaded on the mounting seat (33), the screw (34) passes through the cover plate three (311) and is connected to a clamping block (35), and the contact area between the clamping block (35) and the fuel tank is provided with an anti-slip pad; The pressing part includes a horizontal bar (36), the two ends of which are fixed to two sets of cover plates (311) by a sleeve (37). The sleeve (37) is installed on the two sets of cover plates (311). Two sets of limiting rods (38) are movably passed through the horizontal bar (36). One end of the limiting rod (38) extends downward to form a raised step. A cover (310) is sleeved on the raised step. A spring (39) is sleeved on the limiting rod (38). One end of the spring (39) is connected to the raised step, and the other end abuts against the bottom surface of the horizontal bar (36).

6. The fuel tank strength testing device according to claim 1, characterized in that: The test assembly (2) includes a support frame (21) mounted on the frame base (11). The support frame (21) has an outwardly protruding support end. A cylinder (22) is mounted on the support end. The telescopic end of the cylinder (22) passes through the support end and is connected to a support plate (23). A support strip (24) is mounted on the bottom surface of the support plate (23). A fixed frame (25) is mounted on the support strip (24) near one end. A movable frame (26) is movably connected to the fixed frame (25). The movable frame (26) is movably connected to the fixed frame (25) via a pivot (28).

7. The fuel tank strength testing device according to claim 6, characterized in that: An angle plate (27) is installed on the side of the fixed frame (25). The angle plate (27) is coaxially sleeved on the rotating shaft (28). A through hole adapted to the rotating shaft (28) is opened on the angle plate (27). The scale on the surface of the angle plate (27) is matched with the pointer (29) at one end of the rotating shaft (28). A drop hammer (210) is installed at one end of the movable frame (26). A controller (4) is installed on the support frame (21).

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