A central vector calibration aligner and dynamic fatigue testing device

Abstract

The application provides a center vector calibration aligner and a dynamic fatigue testing device, comprising: a base used for being arranged below a loading rod; a movable part movably arranged on the base in a first direction and used for being connected with a measuring clamp; an adjusting part movably arranged on the base in an up-down direction and connected with one side of the first direction of the movable part; a rebound assembly arranged on the other side of the first direction of the movable part and used for applying a rebound force to the movable part in the first direction, the movable part is driven to move in the first direction by the rebound force of the rebound assembly and the up-down movement of the adjusting part; and a locking part connected with the base and the movable part to lock the position of the adjusted movable part. The problems that the adjusting position is difficult to control, the calibration axis is easily deviated and the work efficiency is affected by manual adjustment in the prior art are solved.

Description

Technical Field

[0001] This application relates to the field of dental medical product testing equipment technology, and in particular to a center vector calibration and alignment device and a dynamic fatigue testing device. Background Technology

[0002] In the manufacturing of dental medical products, dynamic fatigue measurement of the products is required. In the existing technology, the test is usually carried out on a dynamic fatigue measuring machine. The product is clamped and fixed by the original measuring fixture and then placed under the central axis of the loading bar for testing.

[0003] Existing measuring fixtures can only adjust the product's tilt angle and thus its placement height by swinging it up and down, lacking a centering adjustment function. After the measuring fixture is fixed to the product, its position relative to the loading bar is determined manually. If the product is not below the loading bar, the operator needs to adjust the fixture's position. However, the fixture is fixed to the dynamic fatigue measuring machine with screws. During adjustment, after loosening the screws, the fixture needs to be manually pushed, and the distance pushed requires the operator's experience to control. This demands high operator skill. Manual calibration requires simultaneous correction of the X and Y axes, making position adjustment difficult to control and prone to causing misalignment of calibrated axes. Repeated calibrations lead to high time costs and reduced work efficiency.

[0004] Therefore, existing technologies still need to be improved and developed. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this application is to provide a center vector calibration and alignment device and a dynamic fatigue testing device, which solves the problems of difficulty in controlling the adjustment position due to manual adjustment in the prior art, which easily causes the calibration axis to deviate and affects work efficiency.

[0006] On one hand, this application provides a center vector calibration aligner for adjusting the position of the central axis of the measuring fixture and the loading bar. The measuring fixture is used to fix the product to be measured. The center vector calibration aligner includes: a base, which is used to be disposed below the loading bar.

[0007] The movable part is movably mounted on the base along a first direction and is used to connect the measuring fixture;

[0008] An adjusting component is movably mounted on the base in the vertical direction and is connected to one side of the movable part in the first direction.

[0009] A spring-loaded assembly is disposed on the other side of the movable part in the first direction and is used to apply a spring-loaded force to the movable part in the first direction so that the movable part moves toward the adjusting member. The movable part is driven to move in the first direction by the spring-loaded force of the spring-loaded assembly and the up-and-down movement of the adjusting member.

[0010] A locking element connects the base and the movable part to lock the adjusted position of the movable part.

[0011] Optionally, the adjusting member includes: an adjusting block, the side of the adjusting block facing the movable part having a first inclined surface, the first inclined surface abutting against the movable part;

[0012] The adjusting screw connection passes through the adjusting block and is threaded onto the base. By turning the adjusting screw connection, the first inclined surface pushes the movable part.

[0013] In the first direction, the first inclined surface gradually approaches the rebound assembly from bottom to top.

[0014] Optionally, the base includes a first limiting stop, which is located on the side of the adjusting block away from the spring-loaded assembly;

[0015] The first limiting stop has a first limiting inner wall, which abuts against the adjusting block.

[0016] Optionally, the movable part includes: a movable base plate, one side of which abuts against a first inclined surface;

[0017] A guide structure is provided between the movable base plate and the base, and the movable base plate moves along the first direction through the guide structure.

[0018] Optionally, the movable base plate has a second inclined surface that abuts against the first inclined surface.

[0019] Optionally, the guide structure includes: an oblong hole that extends along a first direction and is formed through the movable base plate;

[0020] At least two guide posts are spaced apart on the base along a first direction and are embedded in the waist-shaped hole.

[0021] Optionally, the locking element includes a fastening locking part, which passes through the oblong hole and is screwed onto the base.

[0022] Optionally, the rebound assembly includes: a support portion disposed on the base and extending along a first direction;

[0023] An elastic element is provided on the support part and connected to the movable part.

[0024] Optionally, the base includes a second limiting stop, and a transverse threaded hole is provided through the second limiting stop along the first direction;

[0025] The moving part has guide holes;

[0026] The support part includes: a support rod, one end of which has a threaded section. The support rod passes through the second limiting stop and is connected to the transverse threaded hole through the threaded section. The support rod extends toward the movable part and is inserted into the guide hole.

[0027] The elastic element includes a spring, which is sleeved on the support rod, with one end abutting against the second limiting platform and the other end abutting against the movable part.

[0028] On the other hand, this application also proposes a dynamic fatigue testing device, including: a dynamic fatigue measuring machine and a center vector calibration and alignment device as described above;

[0029] The dynamic fatigue measuring machine includes a worktable and a loading bar set above the worktable;

[0030] The base of the center vector calibrator is set on the workbench, and a measuring fixture is connected to the moving part of the center vector calibrator. The measuring fixture is used to fix the product to be measured.

[0031] Beneficial Effects: The center vector calibration and aligning device and dynamic fatigue testing apparatus of this application, by placing the base below the loading bar and connecting the movable part to the measuring fixture, can move along the base in a first direction. The movable part is limited in a second direction perpendicular to the first direction without shifting, thereby driving the measuring fixture and the product on it to move. This adjusts the position of the product relative to the loading bar in the first direction, placing the product below the central axis of the loading bar. During adjustment, the movable part is pushed vertically on one side of the first direction by an adjusting member, while on the other side, a spring force is applied by a spring-loaded component, causing the movable part to move towards the adjusting member. The spring force of the spring-loaded component and the vertical movement of the adjusting member drive the movable part to move along the first direction, achieving adjustment of the movable part in the first direction. After the movable part, carrying the product, is adjusted, the position of the adjusted movable part is locked by a locking member. This allows the product to be adjusted below the loading bar for dynamic fatigue testing. By moving the movable plate in the first direction, the product can be adjusted to be below the central axis of the support bar, simplifying the operation process, making the adjustment process easier to control, making it easier to achieve position adjustment, and improving testing efficiency. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the main components of a dynamic fatigue testing device according to an embodiment of this application;

[0033] Figure 2 This is a schematic diagram of the structure of a center vector calibration and alignment device according to an embodiment of this application during use;

[0034] Figure 3 This is an exploded view of a center vector calibration and alignment device according to an embodiment of this application;

[0035] Figure 4 This is a cross-sectional view of a center vector calibration and alignment device according to an embodiment of this application during use;

[0036] Figure 5 This is a schematic diagram of the structure of a dynamic fatigue testing device according to an embodiment of this application.

[0037] In the diagram: 10. Center vector calibration and alignment device; 100. Base; 110. First limiting stop; 111. First limiting inner wall; 120. Second limiting stop; 121. Transverse threaded hole; 130. Adjustment cavity; 200. Movable part; 210. Movable base plate; 211. Second inclined surface; 212. Guide hole; 220. Guide structure; 221. Waist-shaped hole; 222. Guide post; 300. Adjusting component; 310. Adjusting block; 311. First inclined surface; 312. Matching countersunk hole; 320. Adjusting screw connection; 400. Springback assembly; 410. Support part; 411. Support rod; 412. Screw connection section; 420. Elastic component; 500. Locking component; 510. Fastening and locking part; 20. Dynamic fatigue measuring machine; 21. Loading bar; 22. Measuring fixture; 23. Workbench; 24. Enclosure. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this application clearer and more explicit, the following detailed description of this application is provided with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0039] It should be noted that in annotations, leader lines with arrows represent non-solid areas such as holes and slots, or non-specific solid features such as higher-level features, or specific directions. Leader lines without arrows represent solid features or specific lower-level features.

[0040] When a component is referred to as "fixed to" or "set on" another component, it may be directly or indirectly located on that other component. When a component is referred to as "connected to" another component, it may be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positions based on the accompanying drawings and are for ease of description only, and should not be construed as limiting the scope of the technical solution. 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. "A plurality" means two or more, unless otherwise explicitly defined.

[0041] Existing dynamic fatigue measuring machines suffer from several problems during use. Firstly, the measuring fixtures are difficult to center, leading to inaccurate test data and complex adjustment procedures. Secondly, they typically require manual calibration of both the X and Y axes simultaneously, which can easily cause misalignment of the calibrated axes, resulting in time-consuming repeated calibrations. To address these issues, this application proposes the following embodiments, as detailed below:

[0042] Example 1

[0043] like Figure 1 , Figure 2 As shown, this embodiment proposes a center vector calibration and alignment device 10, which is installed on a dynamic fatigue measuring machine 20 and connected to a measuring fixture 22. The product to be measured is fixed by the measuring fixture 22. The center vector calibration and alignment device 10 adjusts the position of the measuring fixture 22 in a first direction, so that the product held by the measuring fixture 22 is moved to the position of the central axis of the loading bar 21, and then dynamic fatigue testing is performed. For ease of structural description, the first direction in this embodiment can be the front-back direction (Y-axis direction). In addition, the direction perpendicular to the first direction in the horizontal plane is the second direction, which is the left-right direction (X-axis direction). The vertical direction is the up-down direction. All components in this embodiment are described based on this direction.

[0044] like Figure 1 , Figure 2 , Figure 4As shown, the center vector calibration and alignment device 10 of this embodiment specifically includes: a base 100, a movable part 200, an adjusting member 300, a spring-loaded assembly 400, and a locking member 500. The base 100 is fixedly mounted on the worktable 23 of the dynamic fatigue measuring machine 20 and is located below the loading bar 21 of the dynamic fatigue measuring machine 20. The movable part 200 is movably mounted on the base 100 along a first direction and is used to connect the measuring fixture 22; specifically, the movable part 200 can move on the base 100 in the front-back direction, and the movable part 200 is limited in the left-right direction so that the movable part 200 does not deviate in the left-right direction. In this way, when the measuring fixture 22 clamps the product and is fixed on the movable part 200, the position of the measuring fixture 22 in the left-right direction is limited, and its center in both the left and right directions is located below the loading bar 21. Therefore, it is not necessary to adjust the left-right position of the measuring fixture 22. It is only necessary to adjust the movable part 200 in the front-back direction to move the product to the center of the loading plate in the front-back direction, which simplifies the adjustment process. The adjusting member 300 is movably mounted on the base 100 in the vertical direction and connected to one side of the movable part 200 in the first direction. The spring-loaded component 400 is located on the other side of the movable part 200 in the first direction and is used to apply a spring-loaded force to the movable part 200 in the first direction, causing the movable part 200 to move towards the adjusting member 300. The movable part 200 is driven to move in the first direction by the spring-loaded component 400 and the vertical movement of the adjusting member 300. By using the simple cooperation of the adjusting member 300 and the spring-loaded component 400, linkage adjustment can be performed in the Y-axis direction. Thus, when measuring different products, only the distance in the Y-axis direction needs to be adjusted to achieve multi-product compatibility and greatly reduce the cost of fixture procurement. The locking member 500 connects the base 100 and the movable part 200 to lock the position of the adjusted movable part 200. By locking the position of the adjusted movable part 200, the position of the product can be fixed, and the testing process is completed by loading and detection through the loading rod 21.

[0045] like Figure 1 , Figure 2 , Figure 4As shown, in this embodiment, a center vector calibration calibrator 10 is provided. By placing the base 100 below the loading bar 21 and connecting the movable part 200 to the measuring fixture 22, the movable part 200 can move along the base 100 in the first direction. The movable part 200 is limited in the second direction perpendicular to the first direction without shifting, thereby driving the measuring fixture 22 and the product on the measuring fixture 22 to move. This adjusts the position of the product relative to the loading bar 21 in the first direction, so that the product is located below the central axis of the loading bar 21. During adjustment, the movable part 200 is pushed vertically along one side of the first direction by the adjusting member 300, while the other side of the first direction is moved towards the adjusting member 300 by the spring-loaded component 400. Thus, the movable part 200 is driven to move along the first direction by the spring-loaded component 400 and the vertical movement of the adjusting member 300, achieving adjustment of the movable part 200 in the first direction. After the movable part 200, with the product, is adjusted, the locking member 500 locks the adjusted position of the movable part 200, allowing the product to be positioned below the loading bar 21 for dynamic fatigue testing. The product can be adjusted to below the central axis of the load bar simply by moving the movable plate in the first direction, simplifying the operation process, making the adjustment process easier to control, facilitating position adjustment, and improving testing efficiency. Furthermore, through the modular design of the movable block of the adjusting component 300 and the spring-loaded component 400, multiple products can be compatible and adapted by simply making a linkage adjustment along the Y-axis, and precise positioning can be achieved, improving testing efficiency and ensuring the accuracy of test results.

[0046] like Figure 2 , Figure 3 , Figure 4 As shown, the base 100 in this embodiment further includes a first limiting stop 110 and a second limiting stop 120. The first limiting stop 110 and the second limiting stop 120 are spaced apart in the front-back direction and form an adjustment cavity 130 between them. The movable part 200 is movably disposed in the adjustment cavity 130 in the front-back direction. The first limiting stop 110 is located on the side of the adjusting block 310 away from the rebound assembly 400. Therefore, the first limiting stop 110 can be located on the front side, while the second limiting stop 120 is located on the rear side.

[0047] like Figure 2 , Figure 3 , Figure 4As shown, the adjusting member 300 in this embodiment further includes an adjusting block 310 and an adjusting screw connection 320. The adjusting block 310 has a first inclined surface 311 on the side facing the movable part 200, and the first inclined surface 311 abuts against the movable part 200. The first inclined surface 311 is located on the rear side of the adjusting block 310, and the adjusting screw connection 320 passes through the adjusting block 310 and is threaded onto the base 100. By turning the adjusting screw connection 320, the first inclined surface 311 pushes the movable part 200. In the specific structure, the adjusting screw part 320 can be an adjusting screw. A countersunk hole 312 is formed through the adjusting block 310. The adjusting screw passes through the countersunk hole 312 in the vertical direction and is screwed onto the base 100. Turning the adjusting screw presses down the adjusting block 310, causing it to move downwards and push the movable block backwards. When the adjusting screw is turned upwards, the adjusting block 310 loosens, and the movable part 200 moves forward under the elastic force of the spring-loaded component 400, thus achieving the forward and backward adjustment function of the movable part 200. Furthermore, a visual scale marking is provided at the edge of the countersunk hole 312, and a marking groove is provided at the top of the adjusting screw part 320. Therefore, by adjusting the rotation of the adjusting screw part 320, the marking groove can be aligned with different scale markings in the visual scale marking, allowing for accurate determination of the distance moved by the movable part 200, thereby achieving more precise adjustment control.

[0048] like Figure 2 , Figure 3 , Figure 4 As shown, in this embodiment, the first inclined surface 311 gradually approaches the rebound assembly 400 in the first direction from bottom to top. In the specific structure, the first inclined surface 311 gradually shifts towards the rear side in the direction from bottom to top, thereby pressing the front side of the movable part 200 through the first inclined surface 311, so that the up-and-down movement of the adjusting block 310 can be converted into the back-and-forth movement of the movable part 200.

[0049] like Figure 2 , Figure 3 , Figure 4 As shown, the first limiting stop 110 in this embodiment further includes a first limiting inner wall 111, which abuts against the adjusting block 310. The front side of the adjusting block 310 is a vertical surface, and the first limiting inner wall 111 extends in the left-right direction. Thus, by abutting against the front side of the adjusting block 310 with the first limiting inner wall 111, the front side can be limited, allowing the adjusting block to move stably in the up-down direction.

[0050] like Figure 2 , Figure 3 , Figure 4As shown, further, the movable part 200 in this embodiment specifically includes a movable base plate 210. One side of the movable base plate 210 abuts against the first inclined surface 311. A guide structure 220 is provided between the movable base plate 210 and the base 100, and the movable base plate 210 moves along the first direction through the guide structure 220. In the specific structure, the measuring fixture 22 is fixed to the upper surface of the movable base plate 210, and the front side of the movable base plate 210 cooperates with the first inclined surface 311, so that the movable base plate 210 can be pushed under the pressure of the first inclined surface 311. The front surface of the movable base plate 210 can be a vertical surface, an arc surface, or an inclined surface, all of which can cooperate with the first inclined surface 311 to achieve the pushing function.

[0051] During the pushing process, the movable base plate 210 is limited by the guide structure 220, so that the movable base plate 210 can only move in the forward and backward direction (Y-axis direction) and cannot move in the left and right direction (X-axis direction). This realizes the unidirectional adjustment of the movable base plate 210 (adjustment in the Y-axis direction). When measuring different products, only the distance in the Y-axis direction needs to be adjusted to achieve multi-product compatibility and adaptation.

[0052] like Figure 2 , Figure 3 , Figure 4 As shown, the movable base plate 210 in this embodiment further includes a second inclined surface 211, which abuts against the first inclined surface 311. Specifically, the front side of the movable base plate 210 uses the second inclined surface 211, which gradually slopes from front to back in an upward direction, thus matching the first inclined surface. This makes the vertical movement of the adjusting block 310 more stable and linearly variable during adjustment, allowing for more controllable adjustment of the front and rear positions.

[0053] like Figure 2 , Figure 3As shown, the guide structure 220 of this embodiment further includes: an oblong hole 221 and at least two guide posts 222. The oblong hole 221 extends along a first direction and is formed through the movable base plate 210. The at least two guide posts 222 are spaced apart along the first direction on the base 100 and are embedded in the oblong hole 221. In the specific structure, the dimensions between the two side walls of the oblong hole 221 and the diameter of the guide post 222 can be matched with high precision, for example, by using a shaft-hole fit tolerance of IT7 or higher, thereby forming a high-precision linear guide rail. This prevents the movable base plate 210 from shifting in the left and right directions, ensuring the stability of the position of the measuring fixture 22 connected to it in the left and right directions. Even if the product on the measuring fixture 22 is changed, only the forward and backward movement is required. This embodiment has two guide structures 220, which limit the movable base plate 210 on the left and right sides. Limiting in the left and right directions makes the movement of the movable base plate 210 in the forward and backward directions more stable.

[0054] like Figure 2 , Figure 3 , Figure 4 As shown, the locking component 500 in this embodiment further includes a fastening locking part 510, which passes through the oblong hole 221 and is screwed onto the base 100. The fastening locking part 510 can be a fastening screw, and a fastening threaded hole is provided on the base 100. In the front-back direction, the fastening threaded hole can be located between the two guide posts 222. After the position of the movable base plate 210 is adjusted, the movable base plate 210 can be fixed by simply tightening the fastening screw. The structure is simple and easy to operate.

[0055] like Figure 2 , Figure 3 , Figure 4 As shown, the rebound assembly 400 of this embodiment further includes a support portion 410 and an elastic element 420. The support portion 410 is disposed on the base 100 and extends along a first direction. The elastic element 420 is disposed on the support portion 410 and connected to the movable portion 200. By connecting and limiting the elastic portion through the support portion 410, the elastic portion can stably contract and expand in the front-rear direction. The support portion 410 can be fixedly disposed on the base 100, in which case the movable base plate 210 is movably disposed with the support portion 410. Alternatively, the support portion 410 can be movably disposed on the base 100, in which case the movable base plate 210 is fixedly connected with the support portion 410.

[0056] like Figure 2 , Figure 3 , Figure 4As shown, in this embodiment, the support part 410 is fixed on the base 100. Specifically, a transverse threaded hole 121 is provided through the second limiting stop 120 along the first direction, and a guide hole 212 is provided on the movable part 200. The support part 410 in this embodiment includes a support rod 411, one end of which has a threaded section 412. The support rod 411 passes through the second limiting stop 120 and is connected to the transverse threaded hole 121 through the threaded section 412. The support rod 411 extends toward the movable part 200 and is inserted into the guide hole 212. This allows the rear end of the support rod 411 to be threaded onto the second limiting stop 120 and extend forward. The guide hole 212 at the rear end of the movable base plate 210 can be fitted into the front end of the support rod 411, allowing the movable base plate 210 to move back and forth along the support rod 411. It should be noted that the support rod 411 can be precisely fitted with the guide hole 212, allowing the movable base plate 210 to move stably in the back-and-forth direction, while preventing it from shifting in the left-and-right direction. The elastic element 420 includes a spring, which is sleeved on the support rod 411, with one end abutting against the second limiting stop and the other end abutting against the movable part 200.

[0057] In this embodiment, multiple rebound components 400 can be arranged at intervals along the left and right direction, for example, three can be arranged at the left, center and right positions, so that elastic force is applied to the movable base plate 210 through the elastic element 420 at these three positions, making the force on the movable base plate 210 more stable.

[0058] Example 2

[0059] like Figure 1 , Figure 5 As shown, this embodiment also proposes a dynamic fatigue testing device, including a dynamic fatigue measuring machine 20 and a center vector calibration and calibrator 10 as described above. The dynamic fatigue measuring machine 20 includes a worktable 23 and a loading bar 21 disposed above the worktable 23. The base 100 of the center vector calibration and calibrator 10 is disposed on the worktable 23, and a measuring fixture 22 is connected to the movable part 200 of the center vector calibration and calibrator 10. The measuring fixture 22 is used to fix the product to be measured. A retaining wall 24 can also be detachably disposed at the edge of the worktable 23. During the dynamic fatigue test, the retaining wall 24 is used to enclose the worktable 23.

[0060] In summary, the present application proposes a central vector calibration aligner and a dynamic fatigue testing device. Through modular design, the central vector calibration aligner is set on the workbench of the dynamic fatigue measuring machine and used in cooperation with the original measuring fixture, enabling dynamic fatigue testing for products of different specifications. Instead of replacing the entire fixture according to different product specifications, only by simply adjusting the position of the movable part, multi-product compatibility and adaptation can be achieved, greatly reducing the fixture procurement cost. Moreover, by using the simple cooperation of the adjusting part and the spring-back component, linkage adjustment can be carried out along the Y-axis direction. Integrating a high-precision linear guiding structure and a scaled locking part can improve the positioning accuracy to ±0.02 mm, significantly improving the accuracy of test data compared with traditional manual calibration. With the central vector calibration aligner, current operators can quickly get started after simple training. The single calibration time is shortened from the original average of minutes to within minutes, significantly improving the overall efficiency.

[0061] The above embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A center vector calibration and alignment device for adjusting the position of the central axis of a measuring fixture and a loading bar, wherein the measuring fixture is used to fix the product to be measured, characterized in that, The center vector calibration and alignment device includes: a base, which is used to be disposed below the loading bar; The movable part is movably disposed on the base along a first direction and is used to connect the measuring fixture; An adjusting member is movably disposed on the base in the vertical direction and connected to one side of the movable part in the first direction. A spring-loaded assembly is disposed on the other side of the movable part in a first direction and is used to apply a spring-loaded force to the movable part in the first direction so that the movable part moves toward the adjusting member. The movable part is driven to move in the first direction by the spring-loaded force of the spring-loaded assembly and the up-and-down movement of the adjusting member. A locking element connects the base and the movable part to lock the adjusted position of the movable part.

2. The center vector calibration and alignment device according to claim 1, characterized in that, The adjusting member includes: an adjusting block, the adjusting block having a first inclined surface on the side facing the movable part, the first inclined surface abutting against the movable part; An adjusting screw connection is provided, which passes through the adjusting block and is threaded onto the base. By turning the adjusting screw connection, the first inclined surface pushes the movable part. In the first direction, the first inclined surface gradually approaches the rebound assembly from bottom to top.

3. The center vector calibration and alignment device according to claim 2, characterized in that, The base includes a first limiting stop, which is located on the side of the adjusting block away from the spring-loaded assembly. The first limiting stop has a first limiting inner wall, which abuts against the adjusting block.

4. The center vector calibration and alignment device according to claim 2, characterized in that, The movable part includes: a movable base plate, one side of which abuts against the first inclined surface; A guide structure is provided between the movable base plate and the base, and the movable base plate moves along the first direction through the guide structure.

5. The center vector calibration and alignment device according to claim 4, characterized in that, The movable base plate has a second inclined surface, which matches and abuts against the first inclined surface.

6. The center vector calibration and alignment device according to claim 4, characterized in that, The guide structure includes: an oblong hole, which extends along a first direction and penetrates through the movable base plate; At least two guide posts are spaced apart on the base along a first direction and are embedded in the waist-shaped hole.

7. The center vector calibration and alignment device according to claim 6, characterized in that, The locking component includes a fastening locking part, which passes through the waist-shaped hole and is screwed onto the base.

8. The center vector calibration and alignment device according to claim 1, characterized in that, The rebound assembly includes: a support portion disposed on the base and extending along a first direction; An elastic element is disposed on the support portion and connected to the movable portion.

9. The center vector calibration and alignment device according to claim 8, characterized in that, The base includes a second limiting stop, and a transverse threaded hole is provided through the second limiting stop along the first direction; The movable part is provided with a guide hole; The support part includes: a support rod, one end of which has a threaded section, the support rod passing through the second limiting stop and connected to the transverse threaded hole through the threaded section, the support rod extending toward the movable part and inserted into the guide hole; The elastic element includes a spring, which is sleeved on the support rod, with one end abutting against the second limiting stop and the other end abutting against the movable part.

10. A dynamic fatigue testing device, characterized in that, include: Dynamic fatigue measuring machine and center vector calibration and alignment device as described in any one of claims 1-9; The dynamic fatigue measuring machine includes a worktable and a loading bar disposed above the worktable; The base of the center vector calibrator is mounted on the workbench, and a measuring fixture is connected to the movable part of the center vector calibrator. The measuring fixture is used to fix the product to be measured.

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