Drop test device

Abstract

The embodiment of the invention provides a drop test device, and relates to the technical field of neodymium iron boron experiment equipment. A drop test device comprises a base, a lifting plate is arranged on one side of the base, a lifting groove is formed in one side of the lifting plate, a height adjusting mechanism is installed in the lifting groove in a sliding mode, and the height adjusting mechanism slides up and down along the lifting groove, can be positioned and is used for adjusting the drop height of a neodymium iron boron sample according to experiment requirements. And the feeding mechanism is positioned below the height adjusting mechanism and is used for automatically conveying the neodymium iron boron sample subjected to the falling test into the height adjusting mechanism. The lifting plate is arranged on one side of the base, and the height adjusting mechanism is slidably mounted in the lifting groove, so that the falling height of the neodymium iron boron sample can be flexibly adjusted according to experiment requirements. And by matching with the feeding mechanism, the automatic recovery and repeated test of samples can be realized, the experiment efficiency and the automation level are effectively improved, the manual intervention is reduced, and the test consistency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of NdFeB experimental equipment, and in particular to a drop test device. Background Art

[0002] Drop testing is a common method for material performance testing, widely used to assess the structural stability and impact resistance of electronic components, magnetic materials, packaging, and other products. Especially for brittle magnetic materials such as NdFeB, practical applications place high demands on the drop height, number of drops, and drop posture.

[0003] Chinese Patent Publication No.: CN209446248U discloses a free fall landing experimental device for the bonding force of NdFeB coating, comprising a frame, a motor, an electric push rod, and a collecting box; the device is characterized in that a motor is installed horizontally above the frame, and a reel is installed on the rotor of the motor; sliding columns are vertically provided on both sides of the frame, and sliding sleeves are sleeved on the sliding columns, and the sliding sleeves are connected through sliding rods; an electric push rod is installed vertically downward at the bottom of the sliding rod, a magnetic block is fixed at the telescopic end of the electric push rod, and a rubber disc fixedly connected to the sliding rod is provided below the magnetic block; the reel is connected to the connecting rod by a steel wire rope, and the steel wire rope is wound around the reel; a control panel is provided on one side of the frame, and a switch for controlling the forward and reverse rotation of the motor is provided on the control panel, and a main circuit switch of the electric push rod is also provided; the collecting box is installed at the bottom of the frame; the device can reduce the labor intensity of the experimenter, accurately measure the experimental data of the experimental sample in free fall at a certain height, and improve efficiency.

[0004] It can be seen that the common drop test devices on the market are mostly fixed structures. After the sample is released, it falls directly to the ground or collection area. There is a lack of effective design for sample recovery and repeated testing, resulting in low experimental efficiency, cumbersome operation and poor data consistency.

[0005] Furthermore, existing equipment has deficiencies in sample positioning, guidance, and limiting, making it prone to sample drops, deviations, and splashing, impacting the accuracy of test results and increasing the frequency of manual intervention, hindering the implementation of automated testing processes. Furthermore, conventional methods for sample release control often rely on single electromagnetic adsorption or mechanical flap structures, making it difficult to achieve stable sample release and precise repositioning, limiting their application in continuous testing scenarios.

[0006] Therefore, there is an urgent need to provide a drop test device with a reasonable structure, high degree of automation, and the ability to realize sample cycle testing to solve the above problems, improve test efficiency and data reliability, and meet the diverse testing needs in scientific research, quality inspection, and production processes. Summary of the Invention

[0007] The present application aims to at least solve the problems of low automation, difficult sample recovery, inaccurate positioning and guidance, low test efficiency, and poor repeatability of experimental data in the existing drop test device. To this end, the present application proposes a drop test device.

[0008] According to an embodiment of the present application, a drop test device includes a base, a lifting plate is provided on one side of the base, a lifting slot is provided on one side of the lifting plate, a height adjustment mechanism is slidably installed in the lifting slot, the height adjustment mechanism slides up and down along the lifting slot and can be positioned, and is used to adjust the drop height of the NdFeB sample according to experimental requirements. A feeding mechanism is also provided on the base, and the feeding mechanism is located below the height adjustment mechanism, and is used to automatically transport the NdFeB sample that has completed the drop test to the inside of the height adjustment mechanism to realize repeated drop testing of the sample.

[0009] Furthermore, the height adjustment mechanism includes a lifting plate sliding in the lifting groove, and a plurality of material troughs with one end being open are opened on one side of the lifting plate. A plurality of cylinder threes are installed at the bottom of the lifting plate, and the piston end of the cylinder three is connected to the sealing plate, and the sealing plate seals the bottom of the material trough.

[0010] Furthermore, one side of the trough opening is sealed by a baffle, and positioning plates are provided on both sides of the trough. A sliding hole is provided on the upper end of the positioning plate, and the upper side of the baffle passes through the sliding hole and is slidably connected to the sliding hole.

[0011] Furthermore, a spring is connected between the baffle and the positioning plate.

[0012] Furthermore, a reciprocating screw rod 1 is rotatably installed in the lifting slot, the reciprocating screw rod 1 is threadedly connected to one side of the lifting plate, and the reciprocating screw rod 1 is driven by a motor.

[0013] Furthermore, a floor is provided on the upper surface of the base, and multiple sets of guide plates are symmetrically installed on the floor. The guide plates are fixed to the base through fixed plates. The upper ends of the symmetrical guide plates pass through the lifting plate and are slidably connected to both sides of the trough.

[0014] Furthermore, a plurality of cylinders 1 are installed on one side of the landing plate, the piston end of the cylinder 1 is connected to the push plate 1, and the push plate 1 is located on one side of the symmetrical guide plate.

[0015] Furthermore, the feeding mechanism includes a pair of connecting plates, a bearing frame is arranged between the pair of connecting plates, side frames are arranged on both sides of the lifting plate, and a sliding groove is opened on the side frame. The connecting plates slide in the sliding groove, and a reciprocating screw rod 2 is rotatably installed in one of the sliding grooves, and the reciprocating screw rod 2 is threadedly connected to the connecting plate.

[0016] Furthermore, a second cylinder is installed on one side of the carrying frame, and a piston end of the second cylinder passes through the side wall of the carrying frame and is connected to the second push plate.

[0017] Furthermore, a height line is provided on one side of the lifting slot.

[0018] 1. The beneficial effects of this application are: by providing a lifting plate on one side of the base and sliding a height adjustment mechanism within the lifting slot, the drop height of the NdFeB sample can be flexibly adjusted according to experimental requirements. Combined with a feeding mechanism, it enables automatic sample recovery and repeated testing, effectively improving experimental efficiency and automation, reducing manual intervention, and enhancing test consistency and accuracy.

[0019] 2. The beneficial effects of this application are as follows: by providing a baffle that can slide upward on one side of the trough, when the sealing plate moves backward, the baffle limits and guides the NdFeB sample, causing it to fall smoothly along the direction of the guide plate to avoid deviation, ensuring that the sample accurately falls into the interior of the landing plate, facilitating effective recovery by the feeding mechanism. When the carrier frame transports the sample to the side of the lifting plate, the bottom of the baffle is pushed upward by an external force, thereby opening the open end of the trough. At this time, the second cylinder drives the second push plate to move, which can smoothly push the NdFeB sample into the interior of the trough, realizing automatic loading and cyclic testing of the sample. The structure has strong linkage and convenient operation, which improves the degree of automation of the equipment and experimental efficiency.

[0020] 3. The beneficial effects of this application are as follows: by using cylinder 1 to push push plate 1, and cylinder 2 to push push plate 2, push plates 1 and 2 move synchronously on either side of the guide plate, effectively limiting and sealing the landing area of ​​the NdFeB sample, preventing sample deflection or splashing when dropped, thereby significantly reducing its scattering range and improving recovery efficiency. This rationally designed structure and rapid response provide reliable guarantees for the subsequent feeding mechanism's precise sample capture and cyclic testing, improving the overall automation level of the equipment and experimental repeatability.

[0021] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 This is a schematic diagram of the overall structure according to an embodiment of the present application;

[0024] Figure 2 This is the second schematic diagram of the overall structure according to the embodiment of the present application;

[0025] Figure 3 is a partial schematic diagram of the overall structure according to an embodiment of the present application;

[0026] Figure 4 is a schematic diagram of the structure of the guide plate and the like according to an embodiment of the present application;

[0027] Figure 5 According to the embodiment of this application Figure 4 Schematic diagram of the structure from above;

[0028] Figure 6 is a schematic structural diagram of a height adjustment mechanism according to an embodiment of the present application;

[0029] Figure 7 is a schematic structural diagram of a height adjustment mechanism according to an embodiment of the present application;

[0030] Figure 8 is a schematic diagram of the structure of a positioning plate, etc. according to an embodiment of the present application;

[0031] Figure 9 It is a schematic diagram of the structure of the sealing plate, etc. according to an embodiment of the present application.

[0032] Icons: 1. Base; 2. Lifting plate; 3. Lifting slot; 4. Reciprocating screw rod 1; 5. Height line; 6. Landing plate; 7. Guide plate; 8. Fixed plate; 9. Cylinder 1; 10. Push plate 1; 11. Loading frame; 12. Cylinder 2; 13. Push plate 2; 14. Connecting plate; 15. Side frame; 16. Slide slot; 17. Reciprocating screw rod 2; 18. Lifting plate; 19. Material trough; 20. Cylinder 3; 21. Sealing plate; 22. Positioning plate; 23. Slide hole; 24. Spring; 25. Baffle. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0034] A drop test device according to an embodiment of the present application is described below with reference to the accompanying drawings.

[0035] like Figures 1-9 As shown, the present application provides a drop test device, which is particularly suitable for free drop testing of brittle magnetic materials such as NdFeB, and can realize automatic release, recovery and cyclic testing of samples, thereby improving experimental efficiency and automation. The device includes a base 1, on one side of which a lifting plate 2 is vertically fixedly mounted, and a lifting slot 3 is provided on the lifting plate 2. A height adjustment mechanism is slidably mounted in the lifting slot 3. The height adjustment mechanism can slide up and down along the lifting slot 3 and can be locked at any height position, so that the drop height of the sample can be flexibly set according to experimental requirements.

[0036] In this embodiment, the height adjustment mechanism mainly includes a lifting plate 18, which is slidably arranged inside the lifting groove 3 through a slider on one side, and forms a stable sliding fit with the lifting groove 3 to ensure that it maintains smooth operation during the ascent or descent process. A plurality of material troughs 19 are provided on one side of the lifting plate 18, each material trough 19 being a cavity structure with one end open, for accommodating the NdFeB sample to be tested. A sealing plate 21 is installed at the bottom of the material trough 19, and the sealing plate 21 is driven by a cylinder 3 20. The cylinder 3 20 is fixed to the bottom of the lifting plate 18, and its piston rod extends into the interior of the material trough 19 and is connected to the sealing plate 21, for controlling the opening and closing of the sealing plate 21, thereby achieving stable loading and precise release of the sample.

[0037] Cylinder 3 20 uses compressed air to drive the piston rod, which in turn moves the sealing plate 21, completing the opening and closing of the trough 19. When the sample needs to be released, the control system controls the solenoid valve to switch the air path direction, allowing compressed air to enter the corresponding chamber of cylinder 3 20, pushing the piston rod to extend and opening the sealing plate 21. Conversely, when the sealing plate 21 needs to be closed, the air path direction is changed, the piston rod retracts, and the sealing plate 21 closes.

[0038] Furthermore, a baffle 25 is provided on one side of the opening of the trough 19, and the baffle 25 can slide up and down along the opening direction of the trough 19. Both sides of the baffle 25 respectively penetrate the sliding holes 23 opened at the upper end of the positioning plate 22 and are slidably connected thereto. At the same time, a spring 24 is connected between the baffle 25 and the positioning plate 22, so that the baffle 25 is in a closed state when no external force is applied, restricting the sample. When the sealing plate 21 moves backward to release the sample, the sample will not fall from the opening of the trough 19. When the carrier frame 11 transports the sample back to the vicinity of the trough 19, the baffle 25 is pushed upward by the outside, exposing the open end of the trough 19, making it easier for the subsequent cylinder 2 12 to drive the push plate 2 13 to push the sample into the trough 19, thereby realizing automatic loading and cyclic testing of the sample.

[0039] To automatically raise and lower lift plate 18, a reciprocating screw 4 is rotatably mounted within lift trough 3. This reciprocating screw 4 is threadedly connected to one side of lift plate 18 and, driven by a motor, rotates, moving lift plate 18 up and down along lift trough 3, thereby releasing samples at varying heights. Furthermore, a height gauge 5 is provided on one side of lift trough 3, allowing the operator to visually determine the current height of lift plate 18 and accurately set experimental parameters.

[0040] A controller is mounted on the side frame 15, and the motor is precisely controlled by a control system (e.g., a PLC or single-chip microcomputer). The control system receives instructions from a user interface (e.g., a touch screen or computer software) and calculates the required speed and direction of the motor based on preset experimental parameters (e.g., drop height, number of drops, etc.), thereby driving the reciprocating screw 4 to rotate and driving the lifting plate 18 to the specified height. Multiple photoelectric sensors (not shown) can also be vertically arranged on the inner wall of the lifting tank 3. These sensors are spaced at regular intervals (e.g., every 5 cm or 10 cm) along one side of the inner wall of the lifting tank 3 from bottom to top. These sensors monitor the position of the lifting plate 18 in real time and provide feedback to the control system to ensure positioning accuracy.

[0041] A horizontally arranged ground plate 6 is also provided on the upper surface of the base 1, and a plurality of groups of guide plates 7 are symmetrically installed on the ground plate 6. Each group of guide plates 7 is fixed to the base 1 through a fixing plate 8, and the upper end of the guide plate 7 passes through the lifting plate 18 and is slidably connected to both sides of the material trough 19, playing an auxiliary supporting and guiding role, ensuring that the lifting plate 18 maintains good stability and straightness during the lifting process.

[0042] Furthermore, several cylinders 9 are mounted on one side of the landing plate 6. The piston rods of these cylinders are connected to push plates 10, which are positioned between the two sets of guide plates 7. The primary function of these push plates 10 is to push the sample toward the center after it has finished falling, preventing it from scattering to unintended areas due to inertial splashing. This facilitates the subsequent centralized collection of the sample by the feeding mechanism. Furthermore, push plates 10 can also be linked to push plates 2 13 on the other side, synchronizing their movements at the moment of the sample's fall to limit and seal the landing area, preventing rolling or drifting, and improving the consistency and repeatability of experimental data.

[0043] The feeding mechanism is arranged on the base 1 and is located below the height adjustment mechanism. It is used to automatically recover samples that have completed the drop test and re-transport them to the interior of the height adjustment mechanism to realize the cyclic testing of the samples. The feeding mechanism includes a pair of connecting plates 14, and a supporting frame 11 is fixedly connected between the two connecting plates 14. The supporting frame 11 is used to carry the recovered samples. Side frames 15 are provided on both sides of the lifting plate 2. A slide groove 16 is provided on the side frame 15. The connecting plate 14 is slidably installed in the slide groove 16 and can slide in the vertical direction in the slide groove 16. A reciprocating screw rod 17 is rotatably installed in one of the slide grooves 16. The reciprocating screw rod 17 is threadedly connected to the connecting plate 14 and is driven to rotate by a servo motor or other driving components, thereby controlling the precise movement of the connecting plate 14 and the supporting frame 11 in the vertical direction, so that it can be aligned with the material trough 19 on the lifting plate 18, which is convenient for reloading the sample.

[0044] A second cylinder 12 is mounted on one side of the carrier frame 11. Its piston rod penetrates the sidewall of the carrier frame 11 and connects to a second push plate 13. When the carrier frame 11 rises to align with the trough 19, the second cylinder 12 drives the second push plate 13 forward, pushing the sample inside the carrier frame 11 into the trough 19, completing the automatic loading of the sample.

[0045] At the same time, push plate 2 13 can also be used in conjunction with push plate 1 10 to temporarily close the space between the guide plates 7 during the sample release phase to prevent the sample from being disturbed by the outside world or deviating from the predetermined path during the falling process, thereby further improving the controllability and safety of the test process.

[0046] The entire device's operation is managed by an integrated control system, which can be an automated control system based on a programmable logic controller (PLC) or a single-chip microcomputer. The control system receives user input commands through a human-machine interface (e.g., a touchscreen), such as setting parameters such as the drop height and number of drops, and controls the sequence and timing of each actuator's movements based on these parameters. For example, the control system controls the motor-driven reciprocating screw 1 (4) to rotate according to the set height value, adjusting the lifting plate 18 to the specified height. During the drop, the control system coordinates the actions of cylinder 1 (9) and cylinder 2 (12), ensuring that push plates 1 (10) and 2 (13) activate at the appropriate time to limit the sample's landing area and prevent splashing.

[0047] Cylinders 1 (9) and 2 (12) also use compressed air to drive piston rods, which in turn move push plates 1 (10) and 2 (13). The control system switches the air path direction using solenoid valves according to a pre-set program, causing cylinders 1 (9) and 2 (12) to operate in a predetermined sequence, ensuring precise positioning of the sample during the drop and recovery process.

[0048] In summary, a drop test device has the following working principle: the device is supported by a base 1, and a lifting plate 2 with a lifting groove 3 is provided on one side of the device. A lifting plate 18 is slidably installed in the lifting groove 3 as a height adjustment mechanism. The lifting plate 18 cooperates with the lifting groove 3 through a slider, and is connected to a sealing plate 21 driven by a cylinder 3 20 at the bottom to control the opening and closing of the material trough 19. A sliding baffle 25 reset by a spring 24 is provided on the opening side of the material trough 19 to prevent the sample from falling before it is released; the lifting and lowering of the lifting plate 18 is automatically adjusted by a reciprocating screw 4 and a motor drive. The operator can intuitively judge the current height through the height line 5. At the same time, the photoelectric sensor feeds back the position of the lifting plate 18 to the control system in real time to ensure positioning accuracy; a floor 6 and a guide plate 7 thereon are provided above the base 1 to provide auxiliary guidance for the lifting plate 18 and improve operational stability; a cylinder 9 located on one side of the guide plate 7 pushes the push plate 10 to gather the sample to the center after it falls to prevent splashing and facilitate recovery;

[0049] The feeding mechanism consists of a carrying frame 11 and a connecting plate 14, which are linked to the reciprocating screw rod 2 17 through a slide 16, and its vertical movement is controlled by a servo motor so that the carrying frame 11 can be aligned with the material trough 19; the cylinder 2 12 drives the push plate 2 13 to push the recovered sample into the material trough 19 to complete the reloading; the push plate 10 and the push plate 2 13 can also be linked to temporarily close the falling channel when the sample is released to prevent the sample from being offset or disturbed; the entire system is managed by a control system based on PLC or single-chip microcomputer. After setting the experimental parameters through the human-machine interface, the control system controls the motor, cylinder and various actuators in sequence according to the preset program, and coordinates the entire process of sample release, drop, recovery and reloading to achieve efficient, accurate and repeatable automated drop testing.

[0050] The above are merely examples of the present application and are not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may be subject to various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined or explained in subsequent figures.

[0051] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A drop test device, characterized in that: The invention comprises a base (1), a lifting plate (2) is provided on one side of the base (1), a lifting groove (3) is provided on one side of the lifting plate (2), a height adjustment mechanism is slidably installed in the lifting groove (3), the height adjustment mechanism slides up and down along the lifting groove (3) and can be positioned, and is used to adjust the drop height of the NdFeB sample according to experimental requirements, and a feeding mechanism is also provided on the base (1), the feeding mechanism is located below the height adjustment mechanism, and is used to automatically transport the NdFeB sample that has completed the drop test to the inside of the height adjustment mechanism, so as to realize repeated drop testing of the sample.

2. The drop test device according to claim 1, characterized in that: The height adjustment mechanism includes a lifting plate (18) sliding in the lifting groove (3), a plurality of material grooves (19) with one end being open are provided on one side of the lifting plate (18), a plurality of cylinders (20) are installed at the bottom of the lifting plate (18), the piston end of the cylinder (20) is connected to the sealing plate (21), and the sealing plate (21) seals the bottom of the material groove (19).

3. The drop test device according to claim 2, characterized in that: One side of the opening of the material trough (19) is sealed by a baffle (25), and positioning plates (22) are provided on both sides of the material trough (19). A sliding hole (23) is opened at the upper end of the positioning plate (22), and the upper side of the baffle (25) passes through the sliding hole (23) and is slidably connected to the sliding hole (23).

4. The drop test device according to claim 3, characterized in that: A spring (24) is connected between the baffle (25) and the positioning plate (22).

5. The drop test device according to claim 4, characterized in that: A reciprocating screw rod (4) is rotatably installed in the lifting groove (3), and the reciprocating screw rod (4) is threadedly connected to one side of the lifting plate (18). The reciprocating screw rod (4) is driven by a motor.

6. The drop test device according to claim 1, characterized in that: The upper surface of the base (1) is provided with a floor (6), and a plurality of guide plates (7) are symmetrically mounted on the floor (6). The guide plates (7) are fixed to the base (1) through fixing plates (8). The upper ends of the symmetrical guide plates (7) pass through the lifting plate (18) and are slidably connected to both sides of the material trough (19).

7. The drop test device according to claim 6, characterized in that: A plurality of cylinders (9) are installed on one side of the landing plate (6), and the piston end of the cylinder (9) is connected to the push plate (10), and the push plate (10) is located on one side of the symmetrical guide plate (7).

8. The drop test device according to claim 1, wherein: The feeding mechanism comprises a pair of connecting plates (14), a bearing frame (11) is arranged between the pair of connecting plates (14), side frames (15) are arranged on both sides of the lifting plate (2), a sliding groove (16) is opened on the side frame (15), the connecting plate (14) slides in the sliding groove (16), a reciprocating screw rod (17) is rotatably installed in one of the sliding grooves (16), and the reciprocating screw rod (17) is threadedly connected to the connecting plate (14).

9. The drop test device according to claim 8, characterized in that: A second cylinder (12) is installed on one side of the bearing frame (11), and the piston end of the second cylinder (12) penetrates the side wall of the bearing frame (11) and is connected to the second push plate (13).

10. The drop test device according to claim 9, characterized in that: A height line (5) is provided on one side of the lifting groove (3).

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