Foam box bearing strength testing device

Abstract

The utility model provides a foam box bearing strength testing device, belongs to the technical field of testing devices, and solves the technical problem that an existing foam box bearing strength testing device cannot effectively shield and protect a foam box during bearing strength testing. A foam box bearing strength testing device comprises a workbench and a supporting column fixedly installed at the bottom end of the workbench, the surface of the workbench is rotationally connected with two lead screws, the top ends of the lead screws are rotationally connected with a portal frame, and the portal frame is fixedly installed on the surface of the workbench. According to the utility model, the first toothed plates are arranged on the two sides of the lifting frame, and under the action that the two sides of the gear column are symmetrically meshed with the first toothed plates and the second toothed plates, when the lifting frame drives the pressing plate to carry out a bearing strength test on the foam box, the second toothed plates synchronously drive the transparent cover to upwards protect the outer side of the foam box; automatic in-place of the transparent cover during testing is realized, and the problem that fragments of the foam box splash to influence the testing environment and even accidentally injure testers during testing is avoided.

Description

Technical Field

[0001] This utility model belongs to the technical field of testing devices, and relates to a foam box testing device, particularly a foam box load-bearing capacity testing device. Background Technology

[0002] Foam boxes are box-type packaging containers made of foam plastic, widely used in logistics, cold chain transportation and other fields. To increase the applicability of foam boxes, modern foam packaging boxes have a cushioning cavity on the outside of the body, which is filled with rigid polyurethane foam. The outside of the cushioning cavity is covered with a mesh cloth, and there is a slurry between the cushioning cavity and the mesh cloth to further enhance the overall rigidity of the foam packaging box. The mesh cloth has a certain tensile strength, which enhances the load-bearing strength of the foam packaging box on the outermost side and increases its rigidity. Since its pressure-bearing capacity directly affects the protection performance of the contents, the load-bearing capacity of the foam box needs to be tested by a load-bearing capacity testing device at the factory.

[0003] A search revealed a Chinese patent document disclosing an impact-resistant foam box bearing capacity testing device [Application No.: CN202320817271.0; Publication No.: CN219870676U]. This foam box bearing capacity testing device includes a body, and the positioning device includes an L-shaped plate. An electric telescopic rod is provided on the outer surface of the L-shaped plate, and a rectangular plate is fixedly connected to the output end of the electric telescopic rod. A U-shaped plate is fixedly connected to the outer surface of the rectangular plate, and a rectangular groove is opened on the outer surface of the bearing platform. The U-shaped plate slides in the rectangular groove and on the inner wall of the bearing platform.

[0004] Although the foam box load-bearing capacity testing device disclosed in this patent uses a rectangular plate to fix the foam box to avoid displacement affecting the side view results, fixing the outer wall of the foam box can easily affect the overall structural strength of the foam box, resulting in inaccurate test results. Moreover, due to the different load-bearing capacities of the foam boxes, some foam boxes may break during the test, causing foam fragments to fly and even causing accidental injury to the test personnel, affecting the test environment and test safety. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a foam box load-bearing capacity testing device. The technical problem this invention aims to solve is: how to effectively shield and protect the foam box during load-bearing capacity testing to ensure both testing effectiveness and safety.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A foam box bearing capacity testing device includes a workbench and a support column fixedly installed at the bottom of the workbench. Two lead screws are rotatably connected to the surface of the workbench, and a gantry frame is rotatably connected to the top of the lead screws. The gantry frame is fixedly installed on the surface of the workbench. A lifting frame is connected to the outer wall of the lead screws through ball nuts. The lifting frame is slidably connected inside the gantry frame. A pressure detection unit is connected to the bottom of the lifting frame, and transmission shielding units are installed on both sides of the lifting frame.

[0008] The transmission shielding unit includes two first toothed plates, which are fixedly connected to both ends of the lifting frame. The first toothed plates are movably meshed with a gear column, which is rotatably connected above the worktable. The outer wall of the gear column is meshed with a second toothed plate, which is parallel to the first toothed plate. The outer wall of the second toothed plate is fixedly connected with a transparent cover, which is slidably fitted onto the outer wall of the worktable.

[0009] Using the above structure, the synchronous rotation of two lead screws enables the lifting frame to drive the bottom pressure plate downward, thus squeezing the foam box downward. Simultaneously, the pressure block above the pressure plate adjusts the squeezing pressure, facilitating high-intensity compression of the foam box. Furthermore, with the first toothed plates fixedly connected to both sides of the lifting frame, the first toothed plates mesh with the outer wall of the gear column when the lifting frame moves downward. This meshing with the outer wall of the gear column drives the second toothed plate, causing it to move upward against the outer wall of the worktable. Thus, the transparent cover moves upward as the lifting frame moves downward, rising to the outside of the foam box being tested, providing protection during the strength test of the foam box.

[0010] The workbench has through slots on both sides to accommodate the lifting and lowering movement of the first gear plate, and the first gear plate and the second gear plate are symmetrically arranged on both sides of the gear column.

[0011] With the above structure, the symmetry between the first and second toothed plates allows the lifting frame to drive the pressure plate downwards to compress the foam box for load-bearing tests. Simultaneously, the meshing action of the first toothed plate and the gear column causes the gear column to synchronously drive the second toothed plate to rotate. This causes the second toothed plate to move the transparent cover on the outer wall upwards to shield the outside of the foam box, achieving automatic shielding during load-bearing tests. This effectively prevents foam box fragments from flying. Furthermore, the transparent cover facilitates user observation of the foam box testing process.

[0012] The two lead screws are connected by a synchronous pulley belt drive, and a drive motor is fixedly connected to the top of one of the lead screws. The drive motor is fixedly installed on the top of the gantry frame.

[0013] With the above structure, the two lead screws rotate synchronously through the drive motor and synchronous pulley belt transmission, which facilitates the balanced adjustment of the height of the lifting frame. This allows the lifting frame to drive the bottom pressure plate to perform a load-bearing test on the foam box from top to bottom.

[0014] The outer wall of the support column is fixedly connected to a support block, which is arranged in an "L" shape and has a transparent cover that can be movably overlapped on the surface of the support block.

[0015] With the above structure, the support block limits the downward movement of the transparent cover, allowing it to rest on the surface of the support block under gravity when the second toothed plate is not engaged with the gear post, thus ensuring the limiting effect below the transparent cover.

[0016] Multiple anti-slip rubber strips are fixedly connected to the surface of the workbench, and the anti-slip rubber strips are located below the pressure plate;

[0017] A control box is fixedly connected to the outer wall of the gantry.

[0018] With the above structure, the anti-slip rubber strips improve the stability of the foam box on the workbench surface, increase the friction of the foam box on the workbench surface, facilitate the pressure plate to perform load-bearing tests on the foam box from top to bottom, and the structure is simple and the production cost is low.

[0019] The pressure detection unit includes a pressure block, which is fixedly connected to the bottom of the lifting frame. The output end of the pressure block is attached to a pressure plate. The top of the pressure plate is fixedly connected to a vertical rod, which extends and retracts inside the lifting frame. A telescopic spring is sleeved on the outer wall of the vertical rod, and the telescopic spring is located on the surface of the lifting frame.

[0020] With the above structure, a pressure plate is set at the bottom of the pressure block, allowing users to adjust the pressure of the pressure block to drive the pressure plate to conduct tests of different strengths. Furthermore, by fixing a vertical rod to the top of the pressure plate and installing a telescopic spring on the outer wall of the vertical rod, the pressure plate can be stably raised and lowered below the lifting frame via the vertical rod, ensuring the force transmission effect of the pressure block to the pressure plate and facilitating accurate load-bearing capacity testing of the foam box.

[0021] Compared with the prior art, the foam box bearing capacity testing device of this utility model has the following advantages:

[0022] In this utility model, by setting first toothed plates on both sides of the lifting frame, and under the action of the first toothed plates and the second toothed plates symmetrically meshing on both sides of the gear column, when the lifting frame drives the pressure plate to perform a strength test on the foam box, the second toothed plate simultaneously drives the transparent cover upward to protect the outside of the foam box. This achieves automatic positioning of the transparent cover during the test, avoiding the problem of foam box fragments flying and affecting the test environment, or even accidentally injuring the test personnel. Furthermore, by sliding the transparent cover on the outside of the workbench, the transparent cover can be stored in normal conditions. The structure is compact and highly practical. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a foam box bearing capacity testing device according to this utility model.

[0024] Figure 2 This is a cross-sectional structural schematic diagram of a foam box bearing capacity testing device according to this utility model.

[0025] Figure 3 This utility model Figure 1 A magnified structural diagram at point A.

[0026] In the picture:

[0027] 1. Workbench; 2. Support column; 3. Lead screw; 4. Gantry frame; 5. Lifting frame; 6. Pressure block; 7. Pressure plate; 8. Upright pole; 9. Telescopic spring; 10. First gear plate; 11. Gear column; 12. Second gear plate; 13. Transparent cover; 14. Anti-slip rubber strip; 15. Support block; 16. Control box. Detailed Implementation

[0028] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0029] Example

[0030] like Figures 1-3 As shown;

[0031] A foam box bearing capacity testing device includes a workbench 1, a support column 2 fixedly installed at the bottom of the workbench 1, lead screws 3, a gantry frame 4, a lifting frame 5, a pressure block 6, a pressure plate 7, a vertical pole 8, a telescopic spring 9, a first toothed plate 10, a gear column 11, a second toothed plate 12, a transparent cover 13, anti-slip rubber strips 14, a support block 15, and a control box 16. Two lead screws 3 are rotatably connected to the surface of the workbench 1, and the two lead screws 3 are connected by a synchronous pulley belt drive. A drive motor is fixedly connected to the top of one of the lead screws 3. To ensure the stability of the drive motor, the drive motor is fixedly installed at the top of the gantry frame 4, and the top of the lead screw 3 is rotatably connected to the gantry frame 4. The motor and synchronous pulley belt drive set up so that the two lead screws 3 rotate synchronously, which facilitates the balanced driving of the lifting frame 5 to adjust the height. The lifting frame 5 drives the bottom pressure plate 7 to conduct a load-bearing test on the foam box from top to bottom. At the same time, the gantry frame 4 is fixedly installed on the surface of the workbench 1 to ensure the fixation effect of the gantry frame 4. The control box 16 is fixedly connected to the outer wall of the gantry frame 4 to facilitate the operation of the device by the user. Specifically, the lifting frame 5 is connected to the outer wall of the lead screw 3 through ball nuts. The rotation of the lead screw 3 can drive the lifting frame 5 to adjust the height. The lifting frame 5 is slidably connected to the inside of the gantry frame 4. The bottom end of the lifting frame 5 is connected to a pressure detection unit.

[0032] Furthermore, the pressure testing unit includes a pressure block 6, which is fixedly connected to the bottom of the lifting frame 5. A pressure plate 7 is attached to the output end of the pressure block 6. By setting the pressure plate 7 at the bottom of the pressure block 6, the user can adjust the pressure of the pressure block 6 to drive the pressure plate 7 to perform tests of different intensities. To ensure the stability of the foam box during testing, multiple anti-slip strips 14 are fixedly connected to the surface of the workbench 1. The anti-slip strips 14 are located below the pressure plate 7. This arrangement, under the action of the anti-slip strips 14, improves the stability of the foam box on the surface of the workbench 1, increasing the stability of the foam box on the surface of the workbench 1. The friction facilitates the pressure plate 7 to perform a top-to-bottom load-bearing test on the foam box. Simultaneously, to achieve precise lifting and lowering of the pressure plate 7, a vertical rod 8 is fixedly connected to the top of the pressure plate 7. The vertical rod 8 extends and retracts inside the lifting frame 5, and a telescopic spring 9 is fitted on the outer wall of the vertical rod 8, located on the surface of the lifting frame 5. By fixing the vertical rod 8 to the top of the pressure plate 7 and using the telescopic spring 9 on the outer wall of the vertical rod 8, the pressure plate 7 can be stably lifted and lowered below the lifting frame 5 via the vertical rod 8. This ensures the force transmission effect of the pressure block 6 to the pressure plate 7, facilitating precise load-bearing testing of the foam box by the pressure plate 7.

[0033] To achieve the shielding effect of the foam box during the load-bearing test, transmission shielding units are installed on both sides of the lifting frame 5. Specifically, the transmission shielding unit includes two first toothed plates 10, which are fixedly connected to both ends of the lifting frame 5. Each first toothed plate 10 is movably meshed with a gear column 11, which is rotatably connected above the worktable 1. A second toothed plate 12 is meshed with the outer wall of the gear column 11. The second toothed plate 12 is parallel to the first toothed plate 10. The worktable 1 has through slots on both sides to accommodate the lifting and lowering movement of the first toothed plates 10. The first toothed plates 10 and 12 are symmetrically arranged on both sides of the gear column 11. A transparent cover 13 is fixedly connected to the outer wall of the second toothed plate 12. Due to the symmetry of the first toothed plates 10 and 12, when the lifting frame 5 drives the pressure plate 7 downward to compress the foam box for the load-bearing test, the meshing action of the first toothed plate 10 and the gear column 11 causes the gear column 11 to synchronously drive the second toothed plate 12 to rotate, thus enabling the first toothed plate 10 to rotate. The two-tooth plate 12 drives the transparent cover 13 on the outer wall to rise and cover the outside of the foam box, realizing automatic covering of the foam box during the load-bearing test. This can effectively prevent foam box fragments from flying. At the same time, in order to limit the lifting path of the transparent cover 13 and store it in normal condition, the transparent cover 13 is slidably sleeved on the outer wall of the workbench 1. The transparent setting of the transparent cover 13 makes it convenient for users to observe the foam box testing process. It also realizes the storage of the transparent cover 13 on the outer periphery of the workbench 1 when not testing. In order to ensure the stability of the transparent cover 13 in normal condition, a support block 15 is fixedly connected to the outer wall of the support column 2. The support block 15 is set in an "L" shape, and the surface of the support block 15 is movably overlapped with the transparent cover 13. Through the setting of the support block 15, the transparent cover 13 is limited by the support block 15 when moving downward. When the second toothed plate 12 is not engaged with the gear column 11, the transparent cover 13 overlaps the surface of the support block 15 under the action of gravity, ensuring the limiting effect of the lower part of the transparent cover 13.

[0034] The working principle of this utility model is as follows: During operation, the foam box to be tested is placed on the surface of the workbench 1. Anti-slip rubber strips 14 are installed on the surface of the workbench 1 to improve the stability of the foam box. The control box 16 operates the drive motor to rotate the lead screw 3, causing the two lead screws 3 to rotate synchronously. This allows the lifting frame 5 to move the bottom pressure plate 7 downwards, causing the pressure plate 7 to press down on the foam box. Simultaneously, the pressure block 6, positioned above the pressure plate 7, adjusts the pressing pressure, facilitating high-intensity compression of the foam box by the pressure plate 7. Meanwhile, the lifting frame... Under the action of the first toothed plate 10 fixedly connected to both sides, when the lifting frame 5 moves downward, the first toothed plate 10 meshes with the outer wall of the gear column 11. Through the meshing transmission of the second toothed plate 12 on the outer wall of the gear column 11, the second toothed plate 12 drives the transparent cover 13 to move upward on the outer wall of the worktable 1. When the lifting frame 5 moves downward, the transparent cover 13 moves upward, so that the transparent cover 13 moves and rises to the outside of the foam box being tested, thereby protecting the foam box during the load-bearing test and preventing broken foam fragments from splashing and affecting the test environment, or even causing accidental injury to personnel. This completes the working principle of the foam box load-bearing test device.

[0035] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A foam case bearing strength test device comprising a workbench (1) and a supporting column (2) fixedly installed at the bottom end of the workbench (1), characterized in that: The surface of the workbench (1) is rotatably connected with two lead screws (3), the top end of the lead screw (3) is rotatably connected with a gantry (4), the gantry (4) is fixedly installed on the surface of the workbench (1), the outer wall of the lead screw (3) is connected with a lifting frame (5) through a ball nut, the lifting frame (5) is slidably connected in the interior of the gantry (4), the bottom end of the lifting frame (5) is connected with a pressure detection unit, and both sides of the lifting frame (5) are provided with a transmission shielding unit; The transmission shielding unit comprises two first toothed plates (10), the two first toothed plates (10) are fixedly connected at both ends of the lifting frame (5), the first toothed plate (10) is movably engaged with a gear column (11), the gear column (11) is rotatably connected above the workbench (1), and the outer wall of the gear column (11) is engaged with a second toothed plate (12), the second toothed plate (12) is arranged in parallel with the first toothed plate (10), and the outer wall of the second toothed plate (12) is fixedly connected with a transparent cover (13), and the transparent cover (13) is slidably sleeved on the outer wall of the workbench (1).

2. A foam case strength testing apparatus according to claim 1, wherein: The both sides of the workbench (1) are provided with a through slot capable of accommodating the lifting movement of the first toothed plate (10), and the first toothed plate (10) and the second toothed plate (12) are symmetrically arranged on both sides of the gear column (11).

3. A foam case strength testing apparatus as defined in claim 1, wherein: The two lead screws (3) are connected through synchronous wheel belt drive, and the top end of one of the lead screws (3) is fixedly connected with a driving motor, and the driving motor is fixedly installed at the top end of the gantry (4).

4. A foam case strength testing apparatus as defined in claim 1, wherein: The outer wall of the supporting column (2) is fixedly connected with a supporting block (15), the supporting block (15) is arranged in an "L" type structure, and the surface of the supporting block (15) is movably overlapped with the transparent cover (13).

5. A foam case strength testing apparatus as defined in claim 1, wherein: The surface of the workbench (1) is fixedly connected with a plurality of anti-skid rubber strips (14), and the anti-skid rubber strips (14) are located below the pressing plate (7). The outer wall of the gantry (4) is fixedly connected with a control box (16).

6. A foam case strength testing apparatus as defined in claim 1, wherein: The pressure detection unit comprises a pressure block (6), the pressure block (6) is fixedly connected to the bottom end of the lifting frame (5), and the output end of the pressure block (6) is connected with a pressing plate (7), the top end of the pressing plate (7) is fixedly connected with a vertical rod (8), the vertical rod (8) is telescopic in the interior of the lifting frame (5), and the outer wall of the vertical rod (8) is sleeved with a telescopic spring (9), and the telescopic spring (9) is located on the surface of the lifting frame (5).

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