Drop test rack

Abstract

The utility model provides a drop test rack, belongs to the technical field of initiating explosive device performance testing, and mainly aims to simulate an accidental drop scene of a detonator in the carrying, loading and unloading processes. According to the main technical scheme, the drop test rack comprises a drop support, the drop support is provided with a hanging structure used for hanging a drop cylinder, the drop cylinder is connected with the hanging structure through a traction rope, and the drop cylinder is used for bearing an initiating explosive device to be tested; the pulling rope is connected with the falling clamp, and the falling clamp has a locking state in which the falling cylinder can be locked at a first operation position and a releasing state in which the falling cylinder can be released at a second operation position; one end, far away from the falling clamp, of the traction rope is wound on the winding device, and the winding device is used for winding and unwinding the traction rope so as to drive the falling clamp to be switched between the first operation position and the second operation position.

Description

Technical Field

[0001] This application belongs to the field of pyrotechnic performance testing technology, specifically relating to a drop test frame. Background Technology

[0002] In the field of pyrotechnics, detonators are an extremely sensitive and critical explosive element, and their safety and reliability are crucial to the stability and safety of the entire blasting operation system. Despite strict operating procedures and protocols in the production, transportation, storage, and handling of detonators before final use, accidental drops are still difficult to completely eliminate.

[0003] Traditional detonator performance testing focuses on indicators such as ignition performance and detonation capability under normal operating conditions, but lacks specialized and effective testing methods for assessing the safety and reliability of detonators after accidental drop impacts. Utility Model Content

[0004] In view of this, this application provides a drop test frame, the main purpose of which is to simulate the accidental drop scenario of detonators during handling and loading / unloading.

[0005] To achieve the above objectives, this application mainly provides the following technical solutions:

[0006] This application provides a drop test frame, including:

[0007] A drop support is provided, which is equipped with a suspension structure for suspending a drop cylinder. The drop cylinder is connected to the suspension structure by a traction rope and is used to carry the pyrotechnic item to be tested.

[0008] A drop clamp, wherein the traction rope is connected to the drop clamp, and the drop clamp has a locking state capable of locking the drop cylinder in a first operating position and a releasing state capable of releasing the drop cylinder in a second operating position;

[0009] A winding device is provided, wherein the end of the traction rope away from the drop clamp is wound around the winding device, and the winding device is used to wind and unwind the traction rope to drive the drop clamp to switch between the first operating position and the second operating position.

[0010] Optionally, the drop clamp includes a first clamp and a second clamp arranged opposite to each other. The first clamp and the second clamp are rotatably mounted on the clamp base through their respective rotating connectors. An elastic reset device is provided in the clamp base. The elastic reset device is connected to the first clamp and the second clamp respectively and is used to provide an elastic force to keep the first clamp and the second clamp in a normally closed state so as to clamp the drop cylinder in the first operating position.

[0011] A reducing tube is provided at the second operating position. The inner diameter of the reducing tube gradually decreases along the direction from the first operating position to the second operating position. When the drop clamp is switched to the second operating position, the inner wall of the reducing tube applies pressure to the first and second grippers so that the first and second grippers overcome the elastic force of the elastic reset device and return to the normally open state, so as to release the drop cylinder at the second operating position.

[0012] Optionally, the drop clamp further includes a trigger rod that can pass through the top of the reduced-diameter tube and the drop bracket to pass through a rope hole of the traction rope. A limit switch is provided at the location of the rope hole, and the limit switch is used to sense the trigger rod.

[0013] Optionally, the suspension structure includes a first pulley, which is disposed on the top of the drop bracket, and the traction rope is laid on the first pulley.

[0014] Optionally, the suspension structure further includes a second pulley, which is located between the first pulley and the winding device, and the traction rope is also laid on the second pulley.

[0015] Optionally, the winding device includes a drive motor and a drum, the drive motor being connected to the drum, the drive motor being used to drive the drum to rotate, and the drum being used to wind and release the traction rope.

[0016] Optionally, the winding device further includes a speed reduction assembly, the first end of which is connected to the output end of the drive motor, and the second end of which is connected to the drum.

[0017] Optionally, the drop cage includes at least three legs, and the tilt angle of at least three of the legs is adjustable.

[0018] Optionally, at least three of the outriggers are rotatably connected to a universal joint at their bottom.

[0019] Optionally, the drop tube includes a cover and a shell, the cover and the shell being detachably connected, and a first core and a second core are disposed inside the shell, the first core extending along the axial direction of the shell and the second core extending along the radial direction of the shell.

[0020] By employing the above technical solution, this application has at least the following beneficial effects:

[0021] The drop test frame provided in the embodiments of this application uses a winding device to drive the drop clamp to switch between locked and released states by winding and unwinding the traction rope, enabling precise control of the drop process of the pyrotechnic item under test. Compared with traditional manual or simple mechanical devices for controlling drops, this improves the repeatability and accuracy of the test, and is beneficial for obtaining more reliable experimental data. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the drop test frame according to an optional embodiment of this application;

[0023] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0024] Figure 3 This is a schematic diagram of the structure of a drop clamp according to an optional embodiment of this application;

[0025] Figure 4 This is a schematic diagram of the winding device according to an optional embodiment of this application;

[0026] Figure 5 This is a schematic diagram of the structure of a drop tube according to an optional embodiment of this application.

[0027] The reference numerals in the attached figures are as follows:

[0028] 1. Drop frame; 11. Outrigger; 12. Universal joint; 2. Suspension structure; 21. First pulley; 22. Second pulley; 3. Traction rope; 4. Drop clamp; 41. First gripper; 42. Second gripper; 43. Clamp seat; 44. Elastic reset device; 45. Trigger rod; 5. Winding device; 51. Drive motor; 52. Drum; 53. Reduction assembly; 6. Reduced diameter tube; 7. Limit switch; 8. Drop cylinder; 81. Cylinder cover; 82. Cylinder shell; 83. First cylinder core; 84. Second cylinder core. Detailed Implementation

[0029] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0031] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0032] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0033] See also Figures 1 to 5 As shown, according to an embodiment of this application, a drop test frame is provided, comprising: a drop support 1, a suspension structure 2 for suspending a drop cylinder 8 on the drop support 1, the drop cylinder 8 being connected to the suspension structure 2 via a traction rope 3, the drop cylinder 8 being used to carry the pyrotechnic item to be tested; a drop clamp 4, the traction rope 3 being connected to the drop clamp 4, the drop clamp 4 having a locking state capable of locking the drop cylinder 8 in a first operating position and a releasing state capable of releasing the drop cylinder 8 in a second operating position; and a winding device 5, one end of the traction rope 3 away from the drop clamp 4 being wound around the winding device 5, the winding device 5 being used to wind and unwind the traction rope 3 to drive the drop clamp 4 to switch between the first operating position and the second operating position.

[0034] In this embodiment, the winding device 5 drives the drop clamp 4 to switch between locked and released states by winding and unwinding the traction rope 3, allowing precise control of the drop process of the pyrotechnic item under test. Compared with traditional manual or simple mechanical devices for controlling the drop, this improves the repeatability and accuracy of the test, and is beneficial for obtaining more reliable experimental data.

[0035] The drop support 1 is the basic support structure of the entire drop test frame, providing a stable framework to ensure that the drop test frame will not sway or tip over during the test. Furthermore, a suspension structure 2 is installed on the drop support 1. The suspension structure 2 is a support point, providing a vertical bearing foundation for the subsequent drop test. This ensures that the suspended drop cylinder 8 remains vertically stable during lifting and dropping, avoiding additional swaying or torsional forces caused by suspension point offset, and minimizing adverse effects on test accuracy and repeatability.

[0036] The drop tube 8 has an internal space for holding the pyrotechnic device to be tested. The pyrotechnic device to be tested can be a detonator, etc. In practical applications, the pyrotechnic device to be tested is located in the internal space of the drop tube 8, and the drop tube 8 and the pyrotechnic device to be tested are lifted and released together by the traction rope 3 and the drop clamp 4.

[0037] The drop clamp 4 is connected to the traction rope 3. In practical applications, the traction rope 3 is used to lift the drop clamp 4, and the drop clamp 4 is used to clamp or release the drop cylinder 8.

[0038] Specifically, when the traction rope 3 lifts the drop clamp 4, the movement path of the drop clamp 4 includes a first operating position and a second operating position. When the drop clamp 4 is in the first operating position, the drop clamp 4 can tightly lock the drop cylinder 8 to prevent the drop cylinder 8 from falling accidentally during the lifting process; when the drop clamp 4 is in the second operating position, the drop cylinder 8 has been lifted to the preset height of the drop test, at which time the drop clamp 4 releases the lock on the drop cylinder 8, allowing the drop cylinder 8 to fall freely under the action of gravity, and the formal drop test process begins.

[0039] The traction rope 3 lifts the drop clamp 4 by winding and releasing the traction rope 3 through the winding device 5.

[0040] Specifically, the end of the traction rope 3 furthest from the drop clamp 4 is wound around the winding device 5. In practical applications, when a drop test is required, the winding device 5 winds up the traction rope 3, which can lift the drop cylinder 8 upward to a preset height, i.e., the second operating position; when it is necessary to refill the pyrotechnic item to be tested into the drop cylinder 8, the winding device 5 unwinds the traction rope 3, which can lower the drop clamp 4 to the initial height, i.e., the first operating position. At this time, the test personnel can connect the drop cylinder 8 and the drop clamp 4, and put the new pyrotechnic item to be tested into the drop cylinder 8 to conduct a drop test on the new pyrotechnic item.

[0041] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 3As shown, the drop clamp 4 includes a first gripper 41 and a second gripper 42 arranged opposite to each other. The first gripper 41 and the second gripper 42 are rotatably mounted on the clamp base 43 through their respective rotating connectors. An elastic reset device 44 is provided in the clamp base 43. The elastic reset device 44 is connected to the first gripper 41 and the second gripper 42 respectively and is used to provide elastic force to keep the first gripper 41 and the second gripper 42 in a normally closed state so as to clamp the drop cylinder 8 in the first operating position. A reducing diameter tube 6 is provided in the second operating position. The inner diameter of the reducing diameter tube 6 gradually decreases in the direction from the first operating position to the second operating position. When the drop clamp 4 is switched to the second operating position, the inner wall of the reducing diameter tube 6 applies pressure to the first gripper 41 and the second gripper 42 so that the first gripper 41 and the second gripper 42 overcome the elastic force of the elastic reset device 44 and return to the normally open state so as to release the drop cylinder 8 in the second operating position.

[0042] In this embodiment, an elastic reset device 44 is provided within the clamp seat 43 and connected to the first gripper 41 and the second gripper 42 respectively. The elastic force provided by the elastic reset device 44 keeps the first gripper 41 and the second gripper 42 in a normally closed state, allowing the drop clamp 4 to automatically and reliably clamp the drop cylinder 8 in the first operating position. Simultaneously, a reducing-diameter tube 6 with an inner diameter gradually decreasing from the first operating position to the second operating position is provided in the second operating position. When the drop clamp 4 switches to the second operating position, the inner wall of the reducing-diameter tube 6 applies pressure to the first gripper 41 and the second gripper 42, forcing them to overcome the elastic force of the elastic reset device 44 and return to the normally open state, thereby releasing the drop cylinder 8. This avoids the errors and uncertainties that may arise from complex electronic control or manual operation. As long as the drop clamp 4 accurately reaches the second operating position, the release of the drop cylinder 8 can be stably achieved, ensuring the consistency of the start time of each drop test and helping to improve the repeatability and accuracy of the test.

[0043] The first gripper 41 and the second gripper 42 are components that directly contact the drop cylinder 8 and perform clamping or releasing actions. Specifically, the first gripper 41 and the second gripper 42 have certain curvature or shape characteristics to provide sufficient contact area and friction during clamping, thus stably fixing the drop cylinder 8. For example, the drop cylinder 8 is cylindrical, and the inner sides of the first gripper 41 and the second gripper 42 can be curved, with anti-slip textures on the surface to prevent the drop cylinder 8 from slipping.

[0044] In practical applications, the first gripper 41 and the second gripper 42 are respectively mounted on the fixture base 43 via their respective rotary connectors. The rotary connectors allow the first gripper 41 and the second gripper 42 to rotate around their respective rotary connectors as axes, thereby realizing the opening and closing actions of the first gripper 41 and the second gripper 42.

[0045] The clamp base 43 serves as the mounting foundation and support structure for the entire drop clamp 4. In practical applications, the clamp base 43 provides mounting positions and a stable support frame for the first gripper 41, the second gripper 42, and the internal elastic reset device 44.

[0046] The elastic reset device 44 can be a spring or similar device. In practical applications, the elastic reset device 44 is located inside the clamp seat 43 and connected to the first gripper 41 and the second gripper 42, providing an elastic force to keep the first gripper 41 and the second gripper 42 in a normally closed state. For example, the elastic reset device 44 is a compression spring. When the first gripper 41 and the second gripper 42 are opened by an external force, the compression spring is compressed, storing elastic potential energy. Once the external force disappears, the elastic potential energy of the compression spring is released, causing the first gripper 41 and the second gripper 42 to return to their normally closed state.

[0047] In order to enable the drop clamp 4 to release the drop cylinder 8 in the second operating position, a reducing tube 6 is provided at the second operating position. The inner diameter of the reducing tube 6 gradually decreases from the first operating position toward the second operating position. In practical application, when the drop clamp 4 rises to the second operating position, the first gripper 41 and the second gripper 42 enter the interior of the reducing tube 6. At this time, as the first gripper 41 and the second gripper 42 move along the direction where the inner diameter of the reducing tube 6 gradually decreases, the inward squeezing pressure on the ends of the first gripper 41 and the second gripper 42 away from the drop cylinder 8 gradually increases, eventually overcoming the elastic force of the elastic reset device 44 and opening.

[0048] Specifically, in the initial state or non-drop test phase, the first gripper 41 and the second gripper 42 are normally closed due to the elastic force of the elastic reset device 44. When the drop cylinder 8 needs to be installed into the drop test frame, the tester places the drop cylinder 8 between the first gripper 41 and the second gripper 42. At this time, the first gripper 41 and the second gripper 42 automatically clamp the drop cylinder 8 under the action of the elastic force and can maintain a stable clamping state. When the winding device 5 winds up the traction rope 3 and raises the drop clamp 4 to the second operating position, the first gripper 41 and the second gripper 42 enter the interior of the reduced diameter tube 6. As the first gripper 41 and the second gripper 42 move inside the reduced diameter tube 6, the inner wall of the reduced diameter tube 6 applies a gradually increasing pressure to the first gripper 41 and the second gripper 42. This pressure is directed in the direction that causes the first gripper 41 and the second gripper 42 to open against the elastic force of the elastic reset device 44. When the pressure is high enough, the first gripper 41 and the second gripper 42 overcome the elastic force of the elastic reset device 44 and gradually change from the normally closed state to the normally open state, thereby releasing the drop cylinder 8 and allowing it to begin free fall for a drop test.

[0049] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 2 and Figure 3 As shown, the drop clamp 4 also includes a trigger rod 45, which can pass through the reduced diameter tube 6 and the top of the drop bracket 1 to pass through the rope hole of the traction rope 3. A limit switch 7 is provided at the location of the rope hole, and the limit switch 7 is used to sense the trigger rod 45.

[0050] In this embodiment, the lifting height of the drop clamp 4 can be precisely controlled by setting the limit switch 7 and the trigger rod 45, which can ensure that the lifting height of the traction rope 3 is within a safe range each time, thereby preventing the traction rope 3 from breaking due to excessive stretching.

[0051] In practical applications, the trigger lever 45 moves upward along with the drop clamp 4 under the pulling action of the traction rope 3. When the winding device 5 operates and winds up the traction rope 3, the drop clamp 4 begins to rise, and the trigger lever 45 rises synchronously.

[0052] The drop bracket 1 has a rope hole at its top, which allows the traction rope 3 to pass through in order to lift the drop clamp 4. A limit switch 7 is installed at the location of the rope hole, and the limit switch 7 is configured to be triggered by the trigger rod 45.

[0053] Specifically, in practical applications, the winding device 5 winds up the traction rope 3 according to a predetermined program, the drop clamp 4 gradually rises, and the trigger rod 45 rises accordingly. When the trigger rod 45 rises to the position of the rope hole and is sensed by the limit switch 7, this signal is immediately transmitted to the control system of the winding device 5 (not shown in the figure) or triggers the corresponding control circuit (not shown in the figure). At this time, the control system will stop the further winding action of the winding device 5 according to this signal, so that the drop clamp 4 stops rising, and the traction rope 3 no longer bears the additional tension caused by over-winding.

[0054] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 2 As shown, the suspension structure 2 includes a first pulley 21, which is located on the top of the drop support 1, and the traction rope 3 is laid on the first pulley 21.

[0055] In this embodiment, when the winding device 5 winds up or unwinds the traction rope 3, the traction rope 3 is laid on the first pulley 21 as part of the suspension structure 2, which can change the direction of the force. Specifically, the pulling force applied by the winding device 5 may be horizontal or in other directions, and through the steering action of the first pulley 21, this force is converted into a vertical pulling force, thereby effectively lifting the drop clamp 4 and the drop cylinder 8.

[0056] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 2 As shown, the suspension structure 2 also includes a second pulley 22, which is located between the first pulley 21 and the winding device 5, and the traction rope 3 is also laid on the second pulley 22.

[0057] In this embodiment, when the position of the winding device 5 is not on the same plane as the first pulley 21, the second pulley 22 can be set to allow the traction rope 3 to better adapt to the layout of the equipment, ensuring that the force can be effectively transmitted from the winding device 5 to the first pulley 21, and finally act on the drop clamp 4 and the drop cylinder 8.

[0058] In practical applications, the winding device 5 is located at a lower position on one side of the drop support 1, while the first pulley 21 is at the top of the support. By setting the second pulley 22, the second pulley 22 plays an intermediate connecting role in the force transmission process.

[0059] Specifically, after the traction rope 3 is led out from the winding device 5, it is first laid on the second pulley 22. The second pulley 22 can change the direction of the traction rope 3, allowing it to extend to the first pulley 21 at a suitable angle and path. It should be noted that without the second pulley 22, the traction rope 3 might need to be connected directly from the winding device 5 to the first pulley 21 at a very steep angle, which could lead to dispersion or loss of force during transmission, and in some complex equipment layouts, an effective connection might not be possible.

[0060] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 4 As shown, the winding device includes a drive motor 51 and a drum 52. The drive motor 51 is connected to the drum 52. The drive motor 51 is used to drive the drum 52 to rotate. The drum 52 is used to wind and release the traction rope 3.

[0061] In this embodiment, the drive motor 51 serves as a power source, connected to the drum 52, and can provide precise power output. By controlling the rotation speed and direction of the drive motor 51, the rotation speed and direction of the drum 52 can be precisely controlled, thereby precisely controlling the winding and unwinding of the traction rope 3.

[0062] Among them, the drive motor 51 can be a DC motor, an AC asynchronous motor, or a stepper motor, etc.

[0063] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 4 As shown, the winding device also includes a speed reduction assembly 53. The first end of the speed reduction assembly 53 is connected to the output end of the drive motor 51, and the second end of the speed reduction assembly 53 is connected to the drum 52.

[0064] In this embodiment, by setting the deceleration component 53, the rotational speed of the output shaft of the drive motor 51 can be reduced and the torque increased, ensuring sufficient power when lifting heavy loads such as the drop cylinder 8, and preventing the drive motor 51 from running idle or having insufficient power.

[0065] The reduction assembly 53 can be a gear reduction assembly 53, a belt reduction assembly 53, or a worm gear reduction assembly 53, etc.

[0066] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 As shown, the drop support 1 includes at least three legs 11, and the tilt angle of the at least three legs 11 is adjustable.

[0067] In this embodiment, at least three support legs 11 can form a stable support plane. Simultaneously, the tilt angle of at least three support legs 11 is adjustable, allowing for adjustments based on actual ground conditions and test requirements. It is understood that on uneven ground, adjusting the tilt angle of the support legs 11 ensures good contact between each support leg 11 and the ground, guaranteeing the overall stability of the drop cage 1.

[0068] In the above embodiments, see Figure 3 As shown, at least three outriggers 11 are rotatably connected to universal joints 12 at their bottoms.

[0069] Here, the universal joint 12 can be a planar joint type universal joint 12. By setting the universal joint 12, the contact angle can be automatically adjusted according to the actual shape and slope of the ground in the actual test site, ensuring the overall stability of the drop support 1.

[0070] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 5 As shown, the drop tube 8 includes a tube cover 81 and a tube shell 82. The tube cover 81 and the tube shell 82 are detachably connected. A first tube core 83 and a second tube core 84 are provided inside the tube shell 82. The first tube core 83 extends along the axial direction of the tube shell 82, and the second tube core 84 extends along the radial direction of the tube shell 82.

[0071] In this embodiment, by setting the first core 83 and the second core 84 extending in different directions, the safety performance of the pyrotechnic device under test can be evaluated from multiple angles. It should be noted that different output end postures will result in different stress conditions inside the pyrotechnic device, and the compression, friction, and other effects on the gunpowder during the drop will also vary depending on the posture.

[0072] The first core 83 can, on the one hand, position the output end of the pyrotechnic device under test upwards, similar to the state of the pyrotechnic device under certain special installation environments or storage methods. For example, in some vertically installed launching devices, the output end of the pyrotechnic device is upwards. On the other hand, it can also position the output end of the pyrotechnic device under test downwards, simulating a possible actual working condition. Under certain installation structures or special transportation methods, the pyrotechnic device may be in a state where the output end is downwards.

[0073] The second core 84 enables the output end of the pyrotechnic device under test to be in a horizontal state, which can simulate the state of the pyrotechnic device being placed flat in the transport vehicle or in some horizontally installed equipment during actual transportation.

[0074] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0075] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A drop test frame, characterized in that, include: A drop support (1) is provided with a suspension structure (2) for suspending a drop cylinder (8). The drop cylinder (8) is connected to the suspension structure (2) by a traction rope (3). The drop cylinder (8) is used to carry the pyrotechnic item to be tested. The drop clamp (4) is connected to the traction rope (3). The drop clamp (4) has a locking state that can lock the drop cylinder (8) in a first operating position and a releasing state that can release the drop cylinder (8) in a second operating position. The winding device (5) is used to wind up and unwind the traction rope (3) at one end away from the drop clamp (4) to drive the drop clamp (4) to switch between the first operating position and the second operating position.

2. The drop test frame according to claim 1, characterized in that, The drop clamp (4) includes a first clamp (41) and a second clamp (42) arranged opposite to each other. The first clamp (41) and the second clamp (42) are rotatably mounted on the clamp base (43) through their respective rotating connectors. An elastic reset device (44) is provided in the clamp base (43). The elastic reset device (44) is connected to the first clamp (41) and the second clamp (42) respectively, and is used to provide an elastic force to keep the first clamp (41) and the second clamp (42) in a normally closed state, so as to clamp the drop cylinder (8) in the first operating position. A reducing tube (6) is provided at the second operating position. The inner diameter of the reducing tube (6) gradually decreases along the direction from the first operating position to the second operating position. When the drop clamp (4) is switched to the second operating position, the inner wall of the reducing tube (6) applies pressure to the first clamp (41) and the second clamp (42) so that the first clamp (41) and the second clamp (42) overcome the elastic force of the elastic reset device (44) and return to the normally open state, so as to release the drop cylinder (8) at the second operating position.

3. The drop test frame according to claim 2, characterized in that, The drop clamp (4) also includes a trigger rod (45), which can pass through the top of the reduced diameter tube (6) and the drop bracket (1) to pass through the rope hole of the traction rope (3). A limit switch (7) is provided at the location of the rope hole, and the limit switch (7) is used to sense the trigger rod (45).

4. The drop test frame according to claim 1, characterized in that, The suspension structure (2) includes a first pulley (21), which is located on the top of the drop support (1), and the traction rope (3) is laid on the first pulley (21).

5. The drop test frame according to claim 4, characterized in that, The suspension structure (2) also includes a second pulley (22), which is located between the first pulley (21) and the winding device (5), and the traction rope (3) is also laid on the second pulley (22).

6. The drop test frame according to claim 1, characterized in that, The winding device (5) includes a drive motor (51) and a drum (52). The drive motor (51) is connected to the drum (52). The drive motor (51) is used to drive the drum (52) to rotate. The drum (52) is used to wind and release the traction rope (3).

7. The drop test frame according to claim 6, characterized in that, The winding device (5) further includes a speed reduction assembly (53), the first end of which is connected to the output end of the drive motor (51), and the second end of which is connected to the drum (52).

8. The drop test frame according to claim 1, characterized in that, The drop support (1) includes at least three legs (11), and the tilt angle of the at least three legs (11) is adjustable.

9. The drop test frame according to claim 8, characterized in that, At least three of the outriggers (11) are rotatably connected to the bottom of a universal joint (12).

10. The drop test frame according to claim 1, characterized in that, The drop tube (8) includes a tube cover (81) and a tube shell (82). The tube cover (81) and the tube shell (82) are detachably connected. A first tube core (83) and a second tube core (84) are provided inside the tube shell (82). The first tube core (83) extends along the axial direction of the tube shell (82), and the second tube core (84) extends along the radial direction of the tube shell (82).

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