Device for detecting tensile strength and elongation of magnesium oxide coaxial electrospun bone biological material

Abstract

The invention discloses a magnesium oxide coaxial electrospun bone biological material tensile strength and elongation detection device, and belongs to the technical field of material detection.The magnesium oxide coaxial electrospun bone biological material tensile strength and elongation detection device comprises a clamping mechanism, loading mechanisms are connected to the two sides of the clamping mechanism, the device further comprises a detection mechanism for detecting the elongation, and the clamping mechanism comprises a first side plate and a second side plate; the lower side of the first side plate is rotationally connected with a guide rod, a guide sleeve is rotationally arranged on the second side plate, and the guide rod is slidably inserted into the guide sleeve; a first bearing plate and a second bearing plate are arranged on the first side plate and the second side plate, a first sliding way and a second sliding way which are symmetrically arranged are arranged on the first side plate and the second side plate correspondingly, a pressing rod is slidably connected into the first sliding way and the second sliding way, a first pressing block is fixedly connected to the lower side of the pressing rod, and a second pressing block is slidably connected to the pressing rod. And the upper end of the pressing rod is connected with a hydraulic driving rod. The device has the advantages of fast clamping and multi-angle composite loading.

Description

Technical Field

[0001] This invention belongs to the field of materials testing technology, and in particular relates to a device for testing the tensile strength and elongation of magnesium oxide coaxial electrospun bone biomaterials. Background Technology

[0002] The mechanical properties of bone biomaterials are the core indicator for evaluating their clinical applicability. In particular, magnesium oxide coaxial electrospun bone biomaterials have broad application prospects in the field of bone tissue engineering due to their biomimetic fiber structure and good biocompatibility.

[0003] Currently, most mechanical testing devices for electrospun bone biomaterials are single-axial tensile structures, capable of testing only the strength and elongation of materials under horizontal tension. They cannot simulate the oblique composite stress environment experienced by human bones during physiological activities, leading to discrepancies between test results and actual in vivo performance. Furthermore, traditional clamping mechanisms often employ bolt fastening or pneumatic clamping, resulting in cumbersome operation, time-consuming sample clamping and disassembly, and a tendency for uneven clamping force to cause edge tearing of electrospun membranes, affecting testing accuracy.

[0004] Furthermore, existing devices suffer from poor linkage between the clamping and loading modules. When switching to an oblique loading mode, it is necessary to disassemble and reassemble the clamp or adjust the external support, which is complex and makes it difficult to guarantee angular accuracy, failing to meet the requirements of efficient and multi-condition testing. Therefore, developing a testing device that combines rapid clamping and multi-angle composite loading functions is of great significance for promoting the performance evaluation and clinical translation of magnesium oxide coaxial electrospun bone biomaterials. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides a device for testing the tensile strength and elongation of magnesium oxide coaxial electrospun bone biomaterials. This device combines the advantages of rapid clamping and multi-angle composite loading, thus solving the problems of the prior art.

[0006] This invention is implemented as follows: a device for testing the tensile strength and elongation of magnesium oxide coaxial electrospun bone biomaterials includes a clamping mechanism, with loading mechanisms connected to both sides of the clamping mechanism, and a detection mechanism for detecting elongation. The clamping mechanism includes a first side plate and a second side plate. A guide rod is rotatably connected to the lower side of the first side plate, and a guide sleeve is rotatably provided on the second side plate. The guide rod is slidably inserted into the guide sleeve. A first bearing plate and a second bearing plate are provided on the first side plate and the second side plate, respectively. A first slide rail and a second slide rail are symmetrically arranged on the first side plate and the second slide rail. A pressure rod is slidably connected in the first slide rail and the second slide rail. A first pressure block is fixedly connected to the lower side of the pressure rod, and a second pressure block is slidably connected to the pressure rod. A hydraulic drive rod is connected to the upper end of the pressure rod.

[0007] As a preferred embodiment of the present invention, the lower side of the first side plate is provided with a first notch, and a first rotating shaft is rotatably connected in the first notch, and the first rotating shaft is fixedly connected to the guide rod; the lower side of the second side plate is provided with a second notch, and a second rotating shaft is rotatably connected in the second notch, and the second rotating shaft is fixedly connected to the guide sleeve.

[0008] As a preferred embodiment of the present invention, the upper surfaces of the first bearing plate and the second bearing plate are provided with arc-shaped grooves, and the lower surfaces of the first pressing block and the second pressing block are provided with arc-shaped surfaces, the arc-shaped surfaces extending into the arc-shaped grooves.

[0009] As a preferred embodiment of the present invention, a semicircular plate is fixedly connected to the guide rod, the edge of the semicircular plate has a scale, and the axis of the semicircular plate coincides with the axis of the first rotating shaft; a screw hole is provided on the first side plate, and a screw is connected in the screw hole, the screw being able to press tightly against the semicircular plate.

[0010] In a preferred embodiment of the present invention, a third slide is provided on the side of the first slide, a first collar is fixedly connected to the pressure rod, a first round rod is fixedly connected to both sides of the first collar, and the first round rod is slidably connected to the third slide; a fourth slide is provided on the side of the second slide, a second collar is slidably sleeved on the pressure rod, a second round rod is fixedly connected to both sides of the second collar, and the second round rod is slidably connected to the fourth slide.

[0011] In a preferred embodiment of the present invention, a first vertical pressure plate is fixedly connected to the side of the first bearing plate away from the first side plate, and a second vertical pressure plate is fixedly connected to the side of the second bearing plate away from the second side plate. The side of the first vertical pressure plate is aligned with the side of the first pressure block, and the side of the second vertical pressure plate is aligned with the side of the second pressure block.

[0012] As a preferred embodiment of the present invention, the upper end of the pressure rod is provided with a receiving slide, and a slider is slidably connected in the receiving slide. The hydraulic drive rod and the slider are connected through a tension sensor.

[0013] As a preferred embodiment of the present invention, the first side plate and the second side plate are provided with two laterally distributed first elastic rubber membranes and a second elastic rubber mold disposed along the bottom edge, and the upper side of the first pressing block and the second pressing block is provided with a third elastic rubber mold, which can form a closed space.

[0014] As a preferred embodiment of the present invention, the first side plate and the second side plate are provided with connecting members for connecting the loading mechanism on both sides, and the loading mechanism is configured to be an adjustable loading mechanism.

[0015] As a preferred embodiment of the present invention, the connector includes a connecting plate and a connecting shaft, and the connector is located on both sides of the first slide and the second slide.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. Employing a hydraulically driven pressure rod synchronous clamping structure, the sample can be quickly clamped and disassembled simply by controlling the raising and lowering of the hydraulic drive rod, simplifying the operation and significantly reducing clamping time. Simultaneously, the symmetrically arranged pressure blocks and support plates achieve synchronous clamping, ensuring uniform clamping force distribution and avoiding the tearing problem at the edges of electrospun membrane materials caused by unilateral force in traditional clamps, thus guaranteeing the accuracy of test results. Through a rectangular structure transformed into a parallelogram design, rapid switching between horizontal and oblique stretching can be achieved without changing the clamps, simulating the complex stress states of human bones during physiological activities. The obtained horizontal and oblique mechanical parameters are more comprehensive, providing more reliable data support for the clinical suitability assessment of materials.

[0018] 2. The rotation and sliding fit between the guide rod and the guide sleeve ensures the parallel movement of the first and second side plates during the stretching process and provides stable support for the tilting deformation of the structure; the synchronous deflection design ensures that the sample tilt angle is uniform, avoids additional torque caused by unilateral deflection, and improves the accuracy of oblique tensile testing.

[0019] 3. High degree of integration and wide range of applications: The device integrates clamping, loading and elongation detection functions into one compact structure and is easy to operate; it is not only applicable to magnesium oxide coaxial electrospun bone biomaterials, but can also be extended to the mechanical testing of other electrospun membrane and fiber biomaterials, and has strong versatility. Attached Figure Description

[0020] Figure 1 This is a first-view structural schematic diagram of the magnesium oxide coaxial electrospun bone biomaterial tensile strength and elongation testing device provided in an embodiment of the present invention.

[0021] Figure 2 This is provided by the embodiments of the present invention. Figure 1 A magnified structural diagram of part A in the middle;

[0022] Figure 3 This is provided by the embodiments of the present invention. Figure 1 A magnified structural diagram of part B in the middle section;

[0023] Figure 4 This is a second-view structural schematic diagram of the magnesium oxide coaxial electrospun bone biomaterial tensile strength and elongation testing device provided in an embodiment of the present invention.

[0024] Figure 5 This is provided by the embodiments of the present invention. Figure 1A magnified structural diagram of part A in the middle;

[0025] Figure 6 This is provided by the embodiments of the present invention. Figure 1 A magnified structural diagram of part B.

[0026] In the diagram: 1. First side plate; 2. Second side plate; 3. Guide rod; 4. Guide sleeve; 5. First bearing plate; 6. Second bearing plate; 7. First slide rail; 8. Second slide rail; 9. Pressure rod; 10. First pressure block; 11. Second pressure block; 12. Hydraulic drive rod; 13. First notch; 14. First rotating shaft; 15. Second notch; 16. Second rotating shaft; 17. Arc-shaped groove; 18. Semicircular plate; 19. Screw; 20. Third slide rail; 21. First collar; 22. First round rod; 23. Fourth slide rail; 24. Second collar; 25. Second round rod; 26. First vertical pressure plate; 27. Second vertical pressure plate; 28. Receiving slide rail; 29. ​​Slider; 30. Tension sensor; 31. Connecting plate; 32. Connecting shaft. Detailed Implementation

[0027] To further understand the invention's content, features, and effects, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0028] The structure of the present invention will now be described in detail with reference to the accompanying drawings.

[0029] like Figures 1 to 6 As shown in the embodiment of the present invention, the magnesium oxide coaxial electrospun bone biomaterial tensile strength and elongation testing device includes a clamping mechanism, with loading mechanisms connected to both sides of the clamping mechanism, and also includes a testing mechanism for detecting elongation. The clamping mechanism includes a first side plate 1 and a second side plate 2. A guide rod 3 is rotatably connected to the lower side of the first side plate 1, and a guide sleeve 4 is rotatably provided on the second side plate 2. The guide rod 3 is slidably inserted into the guide sleeve 4. A first bearing plate 5 and a second bearing plate 6 are provided on the first side plate 1 and the second side plate 2. A first slide rail 7 and a second slide rail 8 are respectively symmetrically arranged on the first side plate 1 and the second side plate 2. A pressure rod 9 is slidably connected in the first slide rail 7 and the second slide rail 8. A first pressure block 10 is fixedly connected to the lower side of the pressure rod 9, and a second pressure block 11 is slidably connected to the pressure rod 9. A hydraulic drive rod 12 is connected to the upper end of the pressure rod 9.

[0030] This device achieves composite mechanical testing of materials under horizontal and oblique tensile stresses through the coordinated operation of the clamping mechanism, loading mechanism, and testing mechanism. The specific workflow is as follows:

[0031] Sample clamping stage: The magnesium oxide coaxial electrospun bone biomaterial sample is laid flat on the first support plate 5 and the second support plate 6; the hydraulic drive rod 12 is activated, and the pressure rod 9 is driven to slide down synchronously along the first slide rail 7 and the second slide rail 8, which drives the first pressure block 10 to clamp with the first support plate 5 and the second pressure block 11 to clamp with the second support plate 6, thus completing the rapid synchronous clamping of the sample.

[0032] Horizontal tensile testing stage: The loading mechanism applies horizontal tension to both sides, driving the first side plate 1 and the second side plate 2 to move away from each other along the cooperation direction of the guide rod 3 and the guide sleeve 4; at this time, the rectangular structure formed by the first side plate 1, the second side plate 2, the guide rod 3 and the pressure rod 9 remains stable, and the direction of the tension is parallel to the central axis of the sample, realizing pure horizontal tension; the testing mechanism collects the length change data of the sample in real time during the tensile process, and calculates the horizontal tensile strength and elongation of the material by combining the tension data.

[0033] Oblique tensile testing stage: Without disassembling the sample, the first side plate 1 and the second side plate 2 are driven to deflect synchronously by external force, so that the rectangular structure is deformed into a parallelogram. At this time, the guide rod 3 and the guide sleeve 4 rotate relative to each other and maintain a sliding fit. The two bearing plates tilt synchronously to form a preset angle. The direction of the tension is at a certain angle with the central axis of the sample. The sample is simultaneously subjected to axial tension and shear force. The testing mechanism simultaneously collects the mechanical parameters under oblique stress state to complete the detection of oblique tensile strength and elongation.

[0034] Sample disassembly stage: The hydraulic drive rod 12 drives the pressure rod 9 to reset upward, the first pressure block 10 and the second pressure block 11 separate from the support plate, and the sample after testing is directly removed, completing one testing cycle.

[0035] Furthermore, the lower side of the first side plate 1 is provided with a first notch 13, and a first rotating shaft 14 is rotatably connected to the first notch 13. The first rotating shaft 14 is fixedly connected to the guide rod 3. The lower side of the second side plate 2 is provided with a second notch 15, and a second rotating shaft 16 is rotatably connected to the second notch 15. The second rotating shaft 16 is fixedly connected to the guide sleeve 4. The upper surfaces of the first bearing plate 5 and the second bearing plate 6 are provided with arc-shaped grooves 17, and the lower surfaces of the first pressure block 10 and the second pressure block 11 are provided with arc-shaped surfaces that can extend into the arc-shaped grooves 17.

[0036] Furthermore, a semi-circular plate 18 is fixedly connected to the guide rod 3. The edge of the semi-circular plate 18 has a scale, and the axis of the semi-circular plate 18 coincides with the axis of the first rotating shaft 14. A screw hole is provided on the first side plate 1, and a screw 19 is connected in the screw hole. The screw 19 can press tightly against the semi-circular plate 18. A third slide rail 20 is provided on the side of the first slide rail 7. A first collar 21 is fixedly connected to the pressure rod 9. A first round rod 22 is fixedly connected to both sides of the first collar 21. The first round rod 22 is slidably connected to the third slide rail 20. A fourth slide rail 23 is provided on the side of the second slide rail 8. A second collar 24 is slidably sleeved on the pressure rod 9. A second round rod 25 is fixedly connected to both sides of the second collar 24. The second round rod 25 is slidably connected to the fourth slide rail 23.

[0037] Furthermore, a first vertical pressure plate 26 is fixedly connected to the side of the first support plate 5 away from the first side plate 1, and a second vertical pressure plate 27 is fixedly connected to the side of the second support plate 6 away from the second side plate 2. The side of the first vertical pressure plate 26 is aligned with the side of the first pressure block 10, and the side of the second vertical pressure plate 27 is aligned with the side of the second pressure block 11. The upper end of the pressure rod 9 is provided with a receiving slide 28, in which a slider 29 is slidably connected. The hydraulic drive rod 12 and the slider 29 are connected through a tension sensor 30.

[0038] The first side plate 1 and the second side plate 2 are provided with two laterally distributed first elastic rubber membranes and a second elastic rubber mold arranged along the bottom edge. The upper side of the first pressure block 10 and the second pressure block 11 is provided with a third elastic rubber mold, which can form a closed space. The first side plate 1 and the second side plate 2 are provided with connectors for connecting a loading mechanism on both sides. The loading mechanism is configured to be adjustable in height, so as to be suitable for loading at inclined positions, for example, by driving a hydraulic cylinder through an electric slide table. The connectors include a connecting plate 31 and a connecting shaft 32, and the connectors are located on both sides of the first slide rail 7 and the second slide rail 8, so as not to obstruct the descent and ascent of the pressure rod 9.

[0039] This device is designed based on multi-degree-of-freedom linkage clamping, dual-mode loading, and environmental simulation. Through the coordinated operation of mechanical structures, it can achieve mechanical testing of materials under horizontal / oblique tension and vertical compression, while simulating the physiological temperature environment of the human body. The specific working principle is as follows:

[0040] Horizontal / Oblique Tension Detection Mode:

[0041] Clamping and Positioning: The coaxial electrospun magnesium oxide bone biomaterial is laid flat on the arc-shaped grooves 17 of the first support plate 5 and the second support plate 6. The hydraulic drive rod 12 is activated, driving the pressure rod 9 to move synchronously down along the first slide rail 7 and the second slide rail 8. The pressure rod 9 drives the first pressure block 10 and the second pressure block 11 to press down. The arc-shaped surface of the lower surface of the pressure block is embedded into the arc-shaped grooves 17 of the support plate, achieving stable clamping of the material. At the same time, the first ring 21 and the second ring 24 on the pressure rod 9 slide along the third slide rail 20 and the fourth slide rail 23 respectively, ensuring the parallelism of the movement trajectory of the pressure rod 9.

[0042] Horizontal tension: The loading mechanism applies horizontal tension through the connectors on both sides of the side plate, driving the first side plate 1 and the second side plate 2 to move away from each other along the cooperation direction of the guide rod 3 and the guide sleeve 4; at this time, the rectangular structure formed by the first side plate 1, the second side plate 2, the guide rod 3, and the pressure rod 9 remains stable, the direction of tension is parallel to the central axis of the sample, and the detection mechanism simultaneously collects mechanical and elongation data during the tensioning process.

[0043] Oblique stretching: Loosen screw 19, external force drives the first side plate 1 and the second side plate 2 to rotate synchronously around the first rotating shaft 14 and the second rotating shaft 16, the guide rod 3 and the guide sleeve 4 rotate relative to each other, and the rectangular structure is deformed into a parallelogram; the semicircular plate 18 rotates synchronously with the guide rod 3, and its edge scale can intuitively display the tilt angle. After adjusting to the target angle, tighten screw 19 to press the semicircular plate 18 to achieve angle locking; the loading mechanism adjusts the up and down position of the hydraulic cylinder through the electric slide table to adapt to the tension direction of the tilting position and completes the oblique stretching test.

[0044] The above settings also include a vertical compression detection mode, as follows:

[0045] The material is placed vertically, and the loading mechanism drives the first side plate 1 and the second side plate 2 to move closer together, so that the first vertical pressure plate 26 and the second vertical pressure plate 27 clamp the lower edge of the material; at the same time, the first pressure block 10 and the second pressure block 11 clamp the upper edge of the material, achieving vertical positioning of the material; then the hydraulic drive rod 12 shortens, driving the pressure rod 9 upward to apply tension, completing the vertical tensile performance test of the material. The pressure sensor collects the tension data in real time to ensure the accuracy of the test. The slider 29 at the upper end of the pressure rod 9 can slide along the receiving slide 28 to prevent obstruction of the first side plate 1 and the second side plate 2 from moving closer together. It should be noted that the position of the hydraulic drive rod 12 can also move with the position of the slider 29.

[0046] The human body temperature environment simulation mode closes the first elastic rubber membrane on the first side plate 1 and the second elastic rubber membrane on the second side plate 2, as well as the third elastic rubber membrane on the pressure block to form a closed space; a heater and a temperature controller are installed in the closed space to adjust the temperature to 37°C, simulating the human physiological environment, and completing the mechanical property test of the material under body temperature conditions.

[0047] This setup ensures stable clamping and convenient mounting.

[0048] The use of an arc-shaped groove 17 and an arc-shaped surface for a close-fitting clamping structure increases the contact area between the pressure block and the material, preventing edge tearing of electrospun film materials due to excessive local pressure. The hydraulically driven pressure rod 9 descends synchronously, achieving simultaneous clamping of both sides of the clamps, resulting in high clamping efficiency and uniform clamping force distribution, ensuring repeatability of the test.

[0049] Multi-condition testing, adaptable to complex in vivo force simulation: It can realize three testing modes: horizontal tension, precise angle oblique tension, and vertical compression. The oblique tension angle is precisely controlled by the 18-mark semicircular plate and screw locking. The loading mechanism can be adjusted to adapt to the inclined position through the electric slide. It can simulate the complex force state of human bones during physiological activities, such as axial tension and shear force. The test data is closer to the actual clinical needs.

[0050] Integrated environmental simulation function for more comprehensive testing dimensions: By constructing a closed space through an elastic rubber membrane, it can simulate the physiological temperature of the human body at 37°C, enabling the mechanical property testing of materials under body temperature conditions. This fills the gap between conventional room temperature testing and actual in vivo working conditions, providing more reliable data support for the clinical translation of materials.

[0051] The device boasts an ingenious structural design and strong compatibility: the pressure bar 9, through the cooperation of a collar and a lateral slide, ensures structural stability during horizontal / oblique tensioning without affecting the switching of vertical compression modes; the connecting parts are located on both sides of the slide to avoid obstructing the lifting and lowering of the pressure bar 9, adapting to the connection requirements of various loading mechanisms; the device is not only suitable for magnesium oxide coaxial electrospun bone biomaterials, but can also be extended to the detection of other fibrous and membrane biomaterials. The 18-gradient semicircular plate intuitively displays the tilt angle, and the screw locking structure ensures angle stability; the sensor at the upper end of the pressure bar 9 collects tensile data in real time, enabling accurate monitoring of mechanical parameters; multiple detection modes can be switched without disassembling the fixture, significantly improving detection efficiency.

[0052] Working principle of the invention:

[0053] The material is placed on the first support plate 5 and the second support plate 6. Then, the hydraulic drive rod 12 drives the pressure rod 9 to move downwards along the first slide rail 7 and the second slide rail 8, causing the first pressure block 10 and the second pressure block 11 to press down on the material. The first pressure block 10 and the first support plate 5 clamp the material, and the second pressure block 11 and the second support plate 6 clamp the material, pressing them down synchronously. Then, the loading mechanism applies a tensile force, causing the first side plate 1 and the second side plate 2 to move away from each other. Furthermore, the rectangle formed by the first side plate 1, the second side plate 2, the guide rod 3, and the pressure rod 9 can be tilted synchronously to form a parallelogram. At this time, tilted loading can be performed to test its tilted tensile strength and elongation.

[0054] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0055] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for testing the tensile strength and elongation of magnesium oxide coaxial electrospun bone biomaterials, comprising a clamping mechanism, wherein loading mechanisms are connected to both sides of the clamping mechanism, and further comprising a detection mechanism for detecting elongation, characterized in that: The clamping mechanism includes a first side plate (1) and a second side plate (2). A guide rod (3) is rotatably connected to the lower side of the first side plate (1), and a guide sleeve (4) is rotatably provided on the second side plate (2). The guide rod (3) is slidably inserted into the guide sleeve (4). A first bearing plate (5) and a second bearing plate (6) are provided on the first side plate (1) and the second side plate (2). A first slide rail (7) and a second slide rail (8) are respectively symmetrically arranged on the first side plate (1) and the second slide rail (8). A pressure rod (9) is slidably connected in the first slide rail (7) and the second slide rail (8). A first pressure block (10) is fixedly connected to the lower side of the pressure rod (9), and a second pressure block (11) is slidably connected on the pressure rod (9). A hydraulic drive rod (12) is connected to the upper end of the pressure rod (9).

2. The device for detecting the tensile strength and elongation of magnesium oxide coaxial electrospun bone biomaterials as described in claim 1, characterized in that: The first side plate (1) has a first notch (13) on its lower side, and a first rotating shaft (14) is rotatably connected in the first notch (13). The first rotating shaft (14) and the guide rod (3) are fixedly connected. The second side plate (2) has a second notch (15) on its lower side, and a second rotating shaft (16) is rotatably connected in the second notch (15). The second rotating shaft (16) is fixedly connected to the guide sleeve (4).

3. The device for detecting the tensile strength and elongation of magnesium oxide coaxial electrospun bone biomaterials as described in claim 2, characterized in that: The upper surfaces of the first bearing plate (5) and the second bearing plate (6) are provided with arc-shaped grooves (17), and the lower surfaces of the first pressing block (10) and the second pressing block (11) are provided with arc-shaped surfaces, which can extend into the arc-shaped grooves (17).

4. The device for detecting the tensile strength and elongation of magnesium oxide coaxial electrospun bone biomaterials as described in claim 3, characterized in that: A semicircular plate (18) is fixedly connected to the guide rod (3). The edge of the semicircular plate (18) has a scale. The axis of the semicircular plate (18) coincides with the axis of the first rotating shaft (14). The first side plate (1) is provided with a screw hole, and a screw (19) is connected in the screw hole. The screw (19) can press tightly against the semi-circular plate (18).

5. The device for detecting the tensile strength and elongation of magnesium oxide coaxial electrospun bone biomaterials as described in claim 4, characterized in that: The first slide rail (7) has a third slide rail (20) on its side. A first collar (21) is fixedly connected to the pressure rod (9). A first round rod (22) is fixedly connected to both sides of the first collar (21). The first round rod (22) is slidably connected to the third slide rail (20). The second slide (8) has a fourth slide (23) on its side. A second collar (24) is slidably sleeved on the pressure rod (9). A second round rod (25) is fixedly connected to both sides of the second collar (24). The second round rod (25) is slidably connected to the fourth slide (23).

6. The device for detecting the tensile strength and elongation of magnesium oxide coaxial electrospun bone biomaterials as described in claim 5, characterized in that: A first vertical pressure plate (26) is fixedly connected to the side of the first bearing plate (5) away from the first side plate (1), and a second vertical pressure plate (27) is fixedly connected to the side of the second bearing plate (6) away from the second side plate (2). The side of the first vertical pressure plate (26) is aligned with the side of the first pressure block (10), and the side of the second vertical pressure plate (27) is aligned with the side of the second pressure block (11).

7. The device for detecting the tensile strength and elongation of magnesium oxide coaxial electrospun bone biomaterials as described in claim 6, characterized in that: The upper end of the pressure rod (9) is provided with a receiving slide (28), and a slider (29) is slidably connected in the receiving slide (28). The hydraulic drive rod (12) and the slider (29) are connected through a tension sensor (30).

8. The device for detecting the tensile strength and elongation of magnesium oxide coaxial electrospun bone biomaterials as described in claim 7, characterized in that: The first side plate (1) and the second side plate (2) are provided with two laterally distributed first elastic rubber membranes and a second elastic rubber mold set along the bottom edge. The upper side of the first pressure block (10) and the second pressure block (11) is provided with a third elastic rubber mold, which can form a closed space.

9. The device for detecting the tensile strength and elongation of magnesium oxide coaxial electrospun bone biomaterials as described in claim 8, characterized in that: The first side plate (1) and the second side plate (2) are provided with connecting parts for connecting the loading mechanism, and the loading mechanism is configured to be adjustable in height.

10. The device for detecting the tensile strength and elongation of magnesium oxide coaxial electrospun bone biomaterials as described in claim 9, characterized in that: The connector includes a connecting plate (31) and a connecting shaft (32), and the connector is located on both sides of the first slide (7) and the second slide (8).

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