Fixing device for tension and compression vibration fatigue test of component
By designing and adjusting the spacing between the connecting plates and the clamping blocks, and using a hydraulic cylinder and threaded rod system to achieve four-corner fixation, the problem of components slipping during deformation recovery in existing devices is solved, thereby improving the stability and applicability of the test.
Patent Information
- Application Number
- CN202421998977.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-19
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-08-19
AI Technical Summary
When the existing component tension and compression vibration fatigue test fixture clamps and fixes the two sides of the component without dimensional change, it is easy to slip when the deformation recovers, resulting in an unstable test process.
A fixture for tensile and compressive vibration fatigue testing of components was designed. By adjusting the spacing between the connecting plates and the clamping blocks, the clamping blocks were made to fit tightly against both sides of the component. A hydraulic cylinder and threaded rod system was used to fix the four corners to ensure that the component would not slip during deformation recovery.
The stability and practicality of the tension-compression vibration fatigue test are improved, and the fixing requirements of components of different sizes can be adapted to avoid slipping, thereby enhancing the applicability of the device.
Smart Images
Figure CN223320154U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of fatigue testing, and in particular relates to a fixing device for component tension, compression and vibration fatigue testing. Background Art
[0002] Beam-type component structures will be subject to fatigue loads during normal use. In particular, the longitudinal waves generated after natural disasters such as earthquakes and tsunamis will cause the beam-type component structure to vibrate up and down, and the transverse waves generated will cause it to vibrate horizontally. In the actual production process of beam-type component structures, fatigue tests are often required to test the tensile and compressive vibration resistance of the components. During the test, the components need to be limited by corresponding fixing devices.
[0003] Most of the fixing devices for tensile and compressive vibration fatigue tests of components in the prior art clamp and fix the components on both sides where no dimensional changes occur during the tensile and compressive vibration tests. As a result, when the components are deformed due to the test, they are prone to slipping under the force generated during deformation recovery, which causes certain inconveniences in the testing process and is not conducive to use.
[0004] Therefore, a fixing device for tensile and compressive vibration fatigue testing of components is needed to solve the problem in the prior art that the fixing device clamps and fixes the components on both sides without any dimensional changes, thereby making the components prone to slipping under the force generated during deformation recovery. Utility Model Content
[0005] The purpose of the utility model is to provide a component tension and compression vibration fatigue test fixture to solve the problems raised in the above background technology.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: A component tension and compression vibration fatigue test fixture, comprising a fixed seat, a top groove is provided on the surface of the top of the fixed seat, and two symmetrically distributed moving frames are provided at both ends of the top of the top groove, an opening is provided on the top surface of the fixed seat at positions on both sides of the top groove, a fixed block is fixed at a position on the top surface of the fixed seat close to the adjacent opening, a third threaded rod is threadedly connected through the middle position of the fixed block, an embedded shaft is fixed inside the opening, a slide is slidably sleeved on one side of the outer circumference of the embedded shaft, a connecting plate is slidably sleeved on the other side of the outer circumference of the embedded shaft, a spring is sleeved at the middle position of the outer circumference of the embedded shaft, one side of the spring is fixed to the surface of the adjacent slide, and the other side of the spring is fixed to the surface of the adjacent connecting plate, a clamping block is provided on the side of the connecting plate close to each other and on both sides of the top of the moving frame, a hydraulic cylinder is fixed on the top surface of the clamping block, a pressure plate is slidably provided at the middle position of the clamping block, and the bottom of the hydraulic cylinder passes through the clamping block and is fixed to the surface of the adjacent pressure plate.
[0007] It should be noted in the scheme that two symmetrically distributed sliding sleeves are slidably inserted on both sides of the inner cavity of the top groove, and a first threaded rod is threadedly connected through the middle position of the two sliding sleeves. One end of the first threaded rod is rotatably connected to the inner wall of the top groove, and the other end of the first threaded rod passes through the fixed seat and extends to the outside of the fixed seat.
[0008] It is further worth mentioning that the top of the sliding sleeve passes through the top groove and is fixed to the surface of the bottom of the moving frame at the adjacent position, and a limit rod is inserted through the middle position of the other two sliding sleeves, and the two ends of the limit rod are fixed to the two ends of the inner wall of the top groove.
[0009] It should be further explained that the surface of the top of the motion frame is rotatably connected to a second threaded rod, one side of the second threaded rod passes through the adjacent motion frame and extends out of the motion frame, and the outer peripheral surface of the second threaded rod is threadedly connected to threaded sleeves on both sides of the surface of the inner part of the adjacent motion frame.
[0010] As a preferred embodiment, the bottoms of the four clamping blocks are fixed to the surface of the top of the threaded sleeve at the adjacent position, and the sides of the other two clamping blocks away from each other are fixed to the surface of the second threaded rod at the adjacent position.
[0011] As a preferred embodiment, a limiting shaft is slidably inserted through the middle position of the two motion frames, and two ends of the limiting shaft are fixed to two ends of the inner wall of the top groove.
[0012] Compared with the prior art, the fixture for component tension and compression vibration fatigue testing provided by the present invention has at least the following beneficial effects:
[0013] (1) The distance between the two connecting plates is adjusted by the length of the test component, so that the inner surface of the clamp can abut against the two sides of the component and the connecting plate can abut against the adjacent springs. Therefore, when the test component is deformed during the tension and compression vibration test, the clamp adjacent to the connecting plate can cling to the two sides of the component, thereby preventing the component from sliding off from both sides under the force of deformation recovery, thereby ensuring the stability of the tension and compression vibration fatigue test process and improving the practicality of the device.
[0014] (2) By rotating the first threaded rod, the distance between the two groups of clamps at different ends can be adjusted, and by rotating the second threaded rod, the distance between the two clamps at different sides can be adjusted, so that it is convenient for users to clamp and fix the two ends of components with various lengths and widths without deformation when testing them. In addition, since the four corners of the component can be directly clamped and fixed, the effect of fixing the component can be improved, thereby further improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model in the front view direction;
[0016] Figure 2 For this utility model Figure 1 A schematic diagram of the structure at point A in the middle;
[0017] Figure 3 It is a three-dimensional structural diagram of a local structure of the utility model;
[0018] Figure 4 For this utility model Figure 1 A magnified schematic diagram of the structure at point B.
[0019] In the figure: 1. fixed seat; 2. top groove; 3. moving frame; 4. first threaded rod; 5. limiting rod; 6. sliding sleeve; 7. second threaded rod; 8. threaded sleeve; 9. clamping block; 10. hydraulic cylinder; 11. pressure plate; 12. third threaded rod; 13. fixed block; 14. opening; 15. embedded shaft; 16. slide plate; 17. connecting plate; 18. spring; 19. limiting shaft. DETAILED DESCRIPTION
[0020] See also Figure 1-4The utility model provides a component tension and compression vibration fatigue test fixture, including a fixing seat 1, a top groove 2 is provided on the surface of the top of the fixing seat 1, and two symmetrically distributed moving frames 3 are provided at both ends of the top of the top groove 2. An opening 14 is provided on the top surface of the fixing seat 1 at positions on both sides of the top groove 2. A fixing block 13 is fixed at a position on the top surface of the fixing seat 1 close to the adjacent opening 14. A third threaded rod 12 is threadedly connected through the middle position of the fixing block 13. An embedded shaft 15 is fixed inside the opening 14. A slide plate 16 is provided on one side of the outer circumference of the embedded shaft 15, and a connecting plate 17 is provided on the other side of the outer circumference of the embedded shaft 15. A spring 18 is provided at the middle position of the outer circumference of the embedded shaft 15, and one side of the spring 18 is fixed to the surface of the slide plate 16 at the adjacent position. The other side of the spring 18 is fixed to the surface of the adjacent connecting plate 17. A clamping block 9 is provided on the side where the connecting plates 17 are close to each other and on both sides of the top of the moving frame 3. A hydraulic cylinder 10 is fixed to the surface of the top of the clamping block 9. A pressure plate 11 is slidably provided at the middle position of the clamping block 9. The bottom of the hydraulic cylinder 10 passes through the clamping block 9 and is fixed to the surface of the adjacent pressure plate 11. The distance between the two connecting plates 17 is adjusted according to the length of the test component, so that the inner surface of the clamping block 9 can abut against the two sides of the component and the connecting plate 17 can abut against the adjacent spring 18. Therefore, when the test component is deformed during the tensile and compressive vibration test, the clamping block 9 adjacent to the connecting plate 17 can cling to the two sides of the component, thereby preventing the component from sliding from both sides under the action of deformation recovery.
[0021] Further as Figure 1 、 Figure 2 and Figure 3 As shown, it is worth mentioning that two symmetrically distributed sliding sleeves 6 are slidably inserted on both sides of the inner cavity of the top groove 2, wherein the middle position of the two sliding sleeves 6 is threadedly connected with a first threaded rod 4, one end of the first threaded rod 4 is rotatably connected to the inner wall of the top groove 2, and the other end of the first threaded rod 4 passes through the fixed seat 1 and extends out of the outside of the fixed seat 1, the top of the sliding sleeve 6 passes through the top groove 2 and is fixed to the surface of the bottom of the motion frame 3 at the adjacent position, and a limiting rod 5 is slidably inserted through the middle position of the other two sliding sleeves 6, and the two ends of the limiting rod 5 are connected to the two ends of the inner wall of the top groove 2. The inner cavity of the top groove 2 can play a role of resistance and limitation on the sliding sleeve 6, and the external thread structures at both ends of the outer circumference of the first threaded rod 4 are set in opposite directions. As a result, when the first threaded rod 4 rotates, the two moving frames 3 can be driven to move closer to or away from each other under the cooperation between the internal thread structure on the inner wall of the sliding sleeve 6 and the corresponding external thread structure on the outer circumference of the first threaded rod 4, and the other two sliding sleeves 6 can only slide along the outer circumference of the limit rod 5, thereby further limiting the movement trajectory of the moving frame 3 and making its movement more stable.
[0022] Further as Figure 1 and 3 As shown, it is worth mentioning that the surface of the top of the moving frame 3 is rotatably connected to the second threaded rod 7, one side of the second threaded rod 7 passes through the adjacent position moving frame 3 and extends to the outside of the moving frame 3, and the outer peripheral surface of the second threaded rod 7 is located at the adjacent position. The inner part of the surface of the moving frame 3 is threadedly connected to the threaded sleeve 8 on both sides, wherein the bottom of the four clamping blocks 9 is fixed to the surface of the top of the threaded sleeve 8 at the adjacent position, and the other two clamping blocks 9 are fixed to the surface of the second threaded rod 7 at the adjacent position on one side away from each other. Since the inner cavity surface of the moving frame 3 can play a role of resistance and limitation for the two threaded sleeves 8 and the external thread structures on both sides of the outer peripheral surface of the second threaded rod 7 are set in opposite directions, when the second threaded rod 7 is rotated, the threaded sleeve 8 can move in the horizontal direction under the cooperation between the internal thread structure of its inner wall and the external thread structure of the outer peripheral surface of the second threaded rod 7, so that the clamping blocks 9 can be adjusted to the position where they can clamp the four corners of the component according to the length of the component.
[0023] This solution has the following working process: in actual use, when the user needs to fix the specimen before the tensile and compressive vibration fatigue test, the specimen is placed in the middle position of the two moving frames 3, and the positions of the four clamping blocks 9 are adjusted according to the length of the specimen. Since the inner cavity surface of the moving frame 3 can play a role of resistance and limitation for the two threaded sleeves 8 and the external thread structures on both sides of the outer circumference of the second threaded rod 7 are set in opposite directions, when the second threaded rod 7 is rotated, the threaded sleeve 8 can move horizontally under the cooperation between the internal thread structure of its inner wall and the external thread structure of the outer circumference of the second threaded rod 7, so that the clamping blocks 9 can be adjusted to the position that can clamp the four corners of the component according to the length of the component. Since the inner cavity of the top groove 2 can play a role of resistance and limitation for the sliding sleeve 6 and the external thread structures at both ends of the outer circumference of the first threaded rod 4 are set in opposite directions, when the first threaded rod 4 is subsequently rotated, the two moving frames 3 can be driven closer to each other under the cooperation between the internal thread structure on the inner wall of the sliding sleeve 6 and the corresponding external thread structure on the outer circumference of the first threaded rod 4, so that the two corner positions at both ends of the specimen are It can extend to the inside of the adjacent clamping block 9 and conflict with its inner surface, and then control the hydraulic cylinder 10 to make the pressure plate 11 press the surface of the specimen, so that it can clamp and fix the specimen from the corners at both ends. Then, by rotating the third threaded rod 12, since the slide plate 16 and the connecting plate 17 can only slide in the inner cavity of the adjacent opening 14 along the outer circumference of the adjacent embedded shaft 15, the two connecting plates 17 are driven to move in the direction of approaching each other when extending under the action of the threaded structure between the third threaded rod 12 and the adjacent fixed block 13, until Until the remaining two clamping blocks 9 are in contact with the surfaces on both sides of the specimen and the connecting plate 17 is in contact with the adjacent spring 18 to cause it to deform, at the same time, the remaining two pressure plates 11 are opened to be able to contact the surface of the specimen. Since the spring 18 produces a certain deformation, the connecting plate 17 has a certain range of motion, so that when the connecting plate 17 is deformed during the test and the length dimension is reduced, the clamping blocks 9 connected to the connecting plate 17 can always contact the surfaces on both sides of the specimen, thereby preventing the component from sliding from both sides under the force of deformation recovery.
[0024] According to the above working process, it can be known that: the distance between the two connecting plates 17 is adjusted by the length size of the test component, so that the inner surface of the clamp 9 can resist the two sides of the component and the connecting plate 17 can resist the adjacent position spring 18, so that when the test component is deformed during the tension and compression vibration test, the clamp 9 adjacent to the connecting plate 17 can be tightly attached to the two sides of the component, thereby preventing the component from sliding from both sides under the force of deformation recovery, thereby ensuring the stability of the tension and compression vibration fatigue test process, thereby improving the practicality of the device, by rotating the first threaded rod 4, the distance between the two groups of clamps 9 at different ends can be adjusted, and by rotating the second threaded rod 7, the distance between the two clamps 9 on different sides can be adjusted, so that it is convenient for users to clamp and fix the two ends that have not been deformed when testing components of various lengths and widths, and because the four corners of the component can be directly clamped and fixed, the effect of fixing the component can be improved, thereby further improving the practicality of the device.
[0025] Further as Figure 1 As shown, it is worth mentioning that a limit shaft 19 is inserted and slidably provided at the middle position of the two motion frames 3, and the two ends of the limit shaft 19 are fixed to the two ends of the inner wall of the top groove 2. Since the movement of the motion frame 3 can only slide along the outer peripheral surface of the limit shaft 19, it can further limit the movement trajectory of the limit shaft 19 and make its movement more stable.
[0026] In summary: the distance between the two connecting plates 17 is adjusted by the length of the test component, so that the inner surface of the clamping block 9 can abut against the two sides of the component and the connecting plate 17 can abut against the adjacent position spring 18, so that when the test component is deformed during the tension and compression vibration test, the clamping block 9 adjacent to the connecting plate 17 can cling to the two sides of the component, thereby preventing the component from sliding off from both sides under the force of deformation recovery, thereby ensuring the stability of the tension and compression vibration fatigue test process, thereby improving the practicality of the device, and by rotating the first threaded rod 4, the two groups of clamps at different ends are The spacing between the blocks 9 can be adjusted. By rotating the second threaded rod 7, the spacing between the two clamping blocks 9 on different sides can be adjusted, so that the user can clamp and fix the two ends of components with different lengths and widths without deformation when testing them. In addition, since the four corners of the component can be directly clamped and fixed, the effect of fixing the component can be improved, thereby further improving the practicality of the device. Since the movement of the motion frame 3 can only slide along the outer circumference of the limit shaft 19, the movement trajectory of the limit shaft 19 can be further limited to make its movement smoother.
[0027] The hydraulic cylinder 10 can be purchased on the market. The hydraulic cylinder 10 is equipped with a power supply, which is a mature technology in this field and has been fully disclosed, so it will not be repeated in the specification.
Claims
1. A component tension and compression vibration fatigue test fixture, comprising a fixing seat (1), characterized in that: The top surface of the fixing seat (1) is provided with a top groove (2), and two symmetrically distributed motion frames (3) are provided at both ends of the top of the top groove (2). The top surface of the fixing seat (1) is provided with openings (14) at positions on both sides of the top groove (2). A fixing block (13) is fixed at a position of the top surface of the fixing seat (1) close to the adjacent opening (14). A third threaded rod (12) is threadedly connected through the middle position of the fixing block (13). An embedded shaft (15) is fixed inside the opening (14). A sliding plate (16) is slidably sleeved on one side of the outer circumference of the embedded shaft (15), and a sliding plate (16) is slidably sleeved on the other side of the outer circumference of the embedded shaft (15). The movable sleeve is provided with a connecting plate (17), and a spring (18) is sleeved at the middle position of the outer peripheral surface of the embedded shaft (15), one side of the spring (18) is fixed to the surface of the adjacent slide (16), and the other side of the spring (18) is fixed to the surface of the adjacent connecting plate (17), and a clamping block (9) is provided on the side of the connecting plate (17) close to each other and on both sides of the top of the moving frame (3), and a hydraulic cylinder (10) is fixed to the surface of the top of the clamping block (9), and a pressure plate (11) is slidably provided at the middle position of the clamping block (9), and the bottom of the hydraulic cylinder (10) passes through the clamping block (9) and is fixed to the surface of the adjacent pressure plate (11).
2. A component tension and compression vibration fatigue test fixture according to claim 1, characterized in that: Two symmetrically distributed sliding sleeves (6) are slidably inserted on both sides of the inner cavity of the top groove (2), wherein a first threaded rod (4) is threadedly connected through the middle position of the two sliding sleeves (6), one end of the first threaded rod (4) is rotatably connected to the inner wall of the top groove (2), and the other end of the first threaded rod (4) passes through the fixing seat (1) and extends outside the fixing seat (1).
3. A component tension and compression vibration fatigue test fixture according to claim 2, characterized in that: The top of the sliding sleeve (6) passes through the top groove (2) and is fixed to the bottom surface of the adjacent motion frame (3); a limiting rod (5) is slidably inserted through the middle position of the other two sliding sleeves (6); the two ends of the limiting rod (5) are fixed to the two ends of the inner wall of the top groove (2).
4. A component tension and compression vibration fatigue test fixture according to claim 1, characterized in that: The surface of the top of the motion frame (3) is rotatably connected to a second threaded rod (7), one side of the second threaded rod (7) passes through the adjacent motion frame (3) and extends outside the motion frame (3), and the outer peripheral surface of the second threaded rod (7) is located on both sides of the inner surface of the adjacent motion frame (3) and is threadedly connected to threaded sleeves (8).
5. A component tension and compression vibration fatigue test fixture according to claim 4, characterized in that: The bottoms of four of the clamping blocks (9) are fixed to the surface of the top of the threaded sleeve (8) at the adjacent position, and the sides of the other two clamping blocks (9) that are away from each other are fixed to the surface of the second threaded rod (7) at the adjacent position.
6. A component tension and compression vibration fatigue test fixture according to claim 1, characterized in that: A limiting shaft (19) is slidably inserted through the middle position of the two motion frames (3), and the two ends of the limiting shaft (19) are fixed to the two ends of the inner wall of the top groove (2).