Vibration test fixture

Abstract

The utility model discloses a vibration test fixture, which comprises a base, a clamping mechanism is arranged on the base, the clamping mechanism comprises a plurality of groups of fixing plates, a cylinder, a connecting sleeve, a guide sleeve, an ejector rod, an ejector block and an adaptive mechanism, the fixing plates are fixed on the top surface of the base, the cylinder is fixed among the fixing plates, and the connecting sleeve is connected with the guide sleeve. The connecting sleeve is fixed to the telescopic ends of the multiple sets of air cylinders, the multiple sets of guide sleeves are fixed to the inner wall of the connecting sleeve, the ejector rods slide in the multiple sets of guide sleeves, the ejector blocks are fixed to the top ends of the multiple sets of ejector rods, and the clamping mechanism is clamped through cooperative work of a fixing plate, the air cylinders, the connecting sleeve, the guide sleeves, the ejector rods and the ejector blocks which are arranged on the base. The preliminary clamping and positioning function of the vibration test workpiece is realized, and the problem that workpieces in different shapes are difficult to adapt in the prior art is solved; the air cylinder driving system can provide stable and controllable clamping force.

Description

Technical Field

[0001] This utility model relates to the field of vibration testing technology, and more specifically, to a vibration testing fixture. Background Technology

[0002] In industrial production and quality control, vibration testing is a key step in evaluating product reliability and durability. When conducting vibration tests on workpieces of various shapes and sizes, they need to be firmly fixed on the test platform to ensure the accuracy and consistency of the test results. However, existing vibration testing fixtures are usually designed for workpieces of specific shapes. When faced with workpieces of different shapes and complex structures, these fixtures often fail to achieve effective clamping, which may cause the workpiece to loosen, shift, or even fall off during the test. This not only affects the reliability of the test results but may also damage the test equipment or the workpiece itself.

[0003] In fields such as electronic products, aerospace components, and precision machinery, the shapes and structures of workpieces are becoming increasingly diverse, which places higher demands on the versatility and adaptability of vibration testing fixtures. Traditional vibration testing fixtures usually adopt a fixed structure design with limited adjustment capabilities, making it difficult to adapt to the special needs of different workpieces. In addition, existing fixtures may cause unnecessary pressure or damage to the workpiece surface during clamping, especially for workpieces with fine surface treatment or relatively fragile materials, where this problem is particularly prominent. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the problems existing in the prior art, this utility model provides a vibration testing fixture to solve the technical problems mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a vibration testing fixture, including a base, on which a clamping mechanism is provided. The clamping mechanism includes a fixing plate, a cylinder, a connecting sleeve, a guide sleeve, a push rod, a top block, and an adapter mechanism. The fixing plate is provided with multiple sets fixed to the top surface of the base, the cylinder is fixed between multiple sets of fixing plates, the connecting sleeve is fixed to the telescopic ends of multiple sets of cylinders, the guide sleeve is provided with multiple sets fixed to the inner wall of the connecting sleeve, the push rod slides within multiple sets of guide sleeves, and the top block is fixed to the top of multiple sets of push rods.

[0008] The present invention is further configured such that the adapter mechanism includes a limiting ring, a connecting plate, and a return spring. The limiting ring is fixed to the inner wall of the connecting sleeve and is slidably connected to multiple sets of top rods. The connecting plate is fixed to the bottom end of multiple sets of top rods. The return spring is disposed on the outer wall of multiple sets of top rods and is connected to multiple sets of connecting plates and the limiting ring. This enables stable adjustment and positioning of the top rods, ensuring accurate operation of the device during use.

[0009] The present invention is further configured such that guide grooves are provided on the outer sides of the multiple sets of guide sleeves, and guide plates are fixedly provided on the outer walls of the multiple sets of top rods. The multiple sets of guide plates are slidably connected to the multiple sets of guide grooves to ensure accurate guidance of the top rods, reduce friction and deviation during movement, and improve the working stability of the device.

[0010] The present invention is further configured such that rubber blocks are fixedly provided at the top of each of the multiple sets of top rods, which reduces the impact force generated when the top rods come into contact with other components, protects the equipment from wear, and extends its service life.

[0011] The present invention is further configured such that a fastening mechanism is provided on the outer side of the connecting sleeve. The fastening mechanism includes a sliding groove, a sliding sleeve, a push ring, an inclined groove, an inclined block, and an abutment block. Multiple sets of sliding grooves are provided on the outer side of the connecting sleeve, and the sliding sleeve slides within the multiple sets of sliding grooves. The push ring is fixed on the inner side of the sliding sleeve. Multiple sets of inclined grooves are provided on the inner wall of the connecting sleeve, and the inclined block slides within the multiple sets of inclined grooves. The abutment block is fixed on the inner side of the multiple sets of inclined blocks, ensuring that the connecting sleeve can be firmly fixed, preventing loosening, and improving the fastening and stability of the device.

[0012] The present invention is further configured such that the inner side of each of the multiple sets of abutment blocks is provided with a groove that matches the push rod, so as to ensure the precise fit between the push rod and the abutment block, avoid gaps or deviations between components, and improve the precision of operation.

[0013] The present invention is further configured such that a mating sleeve is fixedly provided on the outer side of the sliding sleeve, a rotating sleeve is rotatably provided on the outer wall of the connecting sleeve, and a threaded sleeve is connected to the outer side of the rotating sleeve. The threaded sleeve is threadedly connected to the mating sleeve, which enables smooth adjustment and rotation through the threaded connection, thereby improving the adjustment accuracy and reliability of the device.

[0014] The present invention is further configured such that a positioning sleeve is fixedly provided on the outer side of the rotating sleeve, and a sliding hole is provided on the inner wall of the positioning sleeve. Multiple sets of sliding holes are distributed on the inner side of the positioning sleeve, and positioning blocks are slidably provided in each set of sliding holes. Push springs are connected between the top of each set of positioning blocks and the inner side of the sliding hole. A positioning groove is provided on the outer wall of the connecting sleeve. Multiple sets of positioning grooves are provided and abut against each of the multiple sets of positioning blocks, ensuring that the positioning blocks slide accurately in the sliding holes, providing a stable positioning function, and enhancing the accuracy and stability of the device.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, the present invention provides a vibration testing fixture, which has the following advantages:

[0017] 1. The clamping mechanism, through the coordinated work of the fixed plate, cylinder, connecting sleeve, guide sleeve, push rod, and push block set on the base, realizes the initial clamping and positioning function of the vibration test workpiece, solving the problem of difficulty in adapting to workpieces of different shapes in the existing technology; the cylinder drive system can provide stable and controllable clamping force, and the push rod ensures accurate positioning of the clamping point through the precise guidance of the guide sleeve. The setting of multiple clamping points allows the fixture to contact multiple surfaces of the workpiece at the same time, which significantly improves the stability and reliability of clamping, thereby ensuring the accuracy of vibration test results.

[0018] 2. The adapter mechanism relies on the ingenious cooperation of the limiting ring, connecting plate and return spring to enable the push rod to automatically adjust its position according to the concavity and convexity of the workpiece surface. When there is a convexity on the workpiece surface, the push rod can retract and compress the return spring, while in the concave area, the return spring will push the push rod forward to fill the space. This adaptive adjustment capability enables the fixture to perfectly fit the surface contour of various irregular workpieces, effectively solving the technical problem of uneven clamping of irregularly shaped workpieces by traditional fixtures. At the same time, the setting of rubber blocks reduces the risk of damage to the workpiece surface.

[0019] 3. The fastening mechanism, through the precise cooperation of components such as sliding grooves, sliding sleeves, push rings, inclined grooves, inclined blocks, and abutment blocks, along with the rotating sleeve, threaded sleeve, and positioning system, achieves reliable locking of the adjusted top rod. The operator only needs to rotate the rotating sleeve to drive the entire locking system. The groove on the inner side of the abutment block precisely cooperates with the top rod, increasing the contact area and improving the locking firmness. The ratchet mechanism composed of the positioning block and push spring in the positioning sleeve ensures the stability and reliability of the locking state, preventing loosening during vibration. The entire fastening system is easy to operate and has a significant locking effect, greatly improving the stability and safety of the clamp in high-frequency vibration environments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a vibration testing fixture according to the present invention;

[0021] Figure 2 This is a schematic diagram of the top rod structure in this utility model;

[0022] Figure 3 This is a cross-sectional view of the connecting sleeve in this utility model;

[0023] Figure 4 This is a schematic diagram of the push sleeve in this utility model;

[0024] Figure 5 This is a cross-sectional view of the positioning sleeve in this utility model.

[0025] In the diagram: 1. Base; 2. Fixing plate; 3. Cylinder; 4. Connecting sleeve; 5. Guide sleeve; 6. Push rod; 7. Push block; 8. Limiting ring; 9. Connecting plate; 10. Return spring; 11. Guide groove; 12. Guide plate; 13. Rubber block; 14. Sliding groove; 15. Sliding sleeve; 16. Push ring; 17. Inclined groove; 18. Inclined block; 19. Abutment block; 20. Mating sleeve; 21. Rotating sleeve; 22. Threaded sleeve; 23. Positioning sleeve; 24. Sliding hole; 25. Positioning block; 26. Push spring; 27. Positioning groove. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0028] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0029] Please see Figures 1-5 A vibration testing fixture includes a base 1, on which a clamping mechanism is provided. The clamping mechanism includes a fixing plate 2, a cylinder 3, a connecting sleeve 4, a guide sleeve 5, a push rod 6, a top block 7, and an adapter mechanism. The fixing plate 2 is provided with multiple sets fixed to the top surface of the base 1. The cylinder 3 is fixed between multiple sets of fixing plates 2. The connecting sleeve 4 is fixed to the telescopic ends of multiple sets of cylinder 3. The guide sleeve 5 is provided with multiple sets fixed to the inner wall of the connecting sleeve 4. The push rod 6 slides within multiple sets of guide sleeve 5. The top block 7 is fixed to the top of multiple sets of push rod 6.

[0030] The adapter mechanism includes a limiting ring 8, a connecting plate 9, and a return spring 10. The limiting ring 8 is fixed to the inner wall of the connecting sleeve 4 and is slidably connected to multiple sets of push rods 6. The connecting plate 9 is fixed to the bottom of the multiple sets of push rods 6. The return spring 10 is set on the outer wall of the multiple sets of push rods 6 and is connected to the multiple sets of connecting plates 9 and the limiting ring 8. Through the combination of the limiting ring 8, the connecting plate 9, and the return spring 10, the limiting, return, and guiding functions of the multiple sets of push rods 6 are realized, thereby improving the stability of the operation.

[0031] Multiple sets of guide sleeves 5 are provided with guide grooves 11 on their outer sides, and multiple sets of top rods 6 are provided with guide plates 12 fixed on their outer walls. The multiple sets of guide plates 12 are slidably connected to the multiple sets of guide grooves 11 respectively. The guide plates 12 and guide grooves 11 slide together and cooperate with the guide sleeves 5 to effectively limit the movement direction of the multiple sets of top rods 6 and improve the guiding accuracy.

[0032] Each of the multiple sets of push rods 6 has a rubber block 13 fixed at its top. The rubber block 13 acts as a buffer, absorbing the impact force of the push rods 6 during operation, protecting the device components, and extending their service life.

[0033] A fastening mechanism is provided on the outer side of the connecting sleeve 4. The fastening mechanism includes a sliding groove 14, a sliding sleeve 15, a push ring 16, an inclined groove 17, an inclined block 18, and an abutment block 19. Multiple sets of sliding grooves 14 are distributed on the outer side of the connecting sleeve 4. The sliding sleeve 15 slides in multiple sets of sliding grooves 14. The push ring 16 is fixed on the inner side of the sliding sleeve 15. Multiple sets of inclined grooves 17 are distributed on the inner wall of the connecting sleeve 4. The inclined block 18 slides in multiple sets of inclined grooves 17. The abutment block 19 is fixed on the inner side of multiple sets of inclined blocks 18. The sliding sleeve 15 pushes the push ring 16 to drive the inclined block 18 to move along the inclined groove 17, so that the abutment block 19 moves laterally, thereby realizing the fastening control function of the connecting sleeve 4.

[0034] Multiple sets of abutment blocks 19 are provided with grooves on their inner sides that are adapted to the push rod 6. The grooves on the abutment blocks 19 fit with the push rod 6, which enhances the stability of the fit between the two and ensures accurate force transmission without slippage.

[0035] A mating sleeve 20 is fixedly provided on the outer side of the sliding sleeve 15, and a rotating sleeve 21 is rotatably provided on the outer wall of the connecting sleeve 4. A threaded sleeve 22 is connected to the outer side of the rotating sleeve 21. The threaded sleeve 22 is threadedly connected to the mating sleeve 20. The rotating sleeve 21 drives the threaded sleeve 22 to rotate, thereby realizing the threaded engagement adjustment function with the mating sleeve 20 and controlling the position and state of the sliding sleeve 15.

[0036] A positioning sleeve 23 is fixedly provided on the outer side of the rotating sleeve 21. A sliding hole 24 is provided on the inner wall of the positioning sleeve 23. Multiple sets of sliding holes 24 are distributed on the inner side of the positioning sleeve 23. Positioning blocks 25 are slidably provided in each set of sliding holes 24. Push springs 26 are connected between the top of each set of positioning blocks 25 and the inner side of the sliding hole 24. A positioning groove 27 is provided on the outer wall of the connecting sleeve 4. Multiple sets of positioning grooves 27 are provided and abut against each set of positioning blocks 25. Under the action of the push springs 26, the positioning blocks 25 extend out of the sliding holes 24 and are engaged in the corresponding positioning grooves 27, thereby realizing the precise positioning function of the rotating sleeve 21 and preventing loosening or displacement.

[0037] In this embodiment, when it is necessary to clamp the workpiece, the workpiece is placed inside the multiple sets of cylinders 3. The connecting sleeve 4 is pushed by the telescopic end of the cylinder 3, so that the rubber block 13 set at the top of the multiple sets of top blocks 7 abuts against the outer wall of the workpiece. The protruding part of the outer wall of the workpiece pushes the multiple sets of top blocks 7, so that the push rod 6 slides along the guide sleeve 5 and the limiting ring 8. The push rod 6 pushes the connecting plate 9 and stretches the return spring 10. The concave part of the workpiece is pulled by the return spring 10, which pulls the connecting plate 9 and drives the push rod 6 to slide along the guide sleeve 5, so that the rubber block 13 abuts against the concave part of the workpiece. Then, the rotating sleeve 21 drives the threaded sleeve 22 to rotate. The threaded sleeve 22 and the mating sleeve 20 are threadedly engaged, so that the mating sleeve 20 pushes the sliding sleeve 15 to slide along the multiple sets of sliding grooves 14. The sliding sleeve 15 drives the push sleeve to push the multiple sets of abutting blocks 19, so that they slide along the inclined groove 17 through the inclined block 18, so that the multiple sets of abutting blocks 19 abut against the outer wall of the pressure rod, and the multiple sets of push rods 6 are fixed by friction.

[0038] More specifically, multiple sets of push springs 26 push the positioning block 25 to slide along the sliding hole 24 and abut against the positioning groove 27 to position the rotating sleeve 21. When the rotating sleeve 21 needs to be rotated, a certain twisting force is applied, so that the multiple sets of positioning grooves 27 push the positioning block 25 to retract into the sliding hole 24 and squeeze the push springs 26, so that the positioning block 25 is disengaged from the positioning groove 27. When it moves to the next set of positioning grooves 27, the multiple sets of push springs 26 push the positioning block 25 to abut against the positioning groove 27 again.

[0039] In summary, during the use or operation of the overall equipment: when it is necessary to clamp the workpiece, the workpiece is placed inside the multiple sets of cylinders 3. The extension and retraction ends of the cylinders 3 push the connecting sleeve 4, causing the rubber blocks 13 at the top of the multiple sets of top blocks 7 to abut against the outer wall of the workpiece. The protruding parts of the outer wall of the workpiece push the multiple sets of top blocks 7, causing the push rod 6 to slide along the guide sleeve 5 and the limiting ring 8. The push rod 6 pushes the connecting plate 9 and stretches the return spring 10. The recessed parts of the workpiece are pulled by the return spring 10, which pulls the connecting plate 9 and drives the push rod 6 to slide along the guide sleeve 5, so that the rubber block 13 abuts against the recessed parts of the workpiece. Then, the rotating sleeve 21 drives the threaded sleeve 22 to rotate. The threaded sleeve 22 and the mating sleeve 20 are threadedly engaged, causing the mating sleeve 20 to push the sliding sleeve 15 to slide along the multiple sets of sliding grooves 14. The sliding sleeve 15 drives the push sleeve to push the multiple sets of abutting blocks 19, causing them to slide along the inclined groove 17 through the inclined block 18, so that the multiple sets of abutting blocks 19 are pressed against the outer wall of the pressure rod, and the multiple sets of push rods 6 are fixed by friction.

[0040] Multiple sets of push springs 26 push the positioning block 25 to slide along the sliding hole 24 and abut against the positioning groove 27 to position the rotating sleeve 21. When the rotating sleeve 21 needs to be rotated, a certain twisting force is applied, so that the multiple sets of positioning grooves 27 push the positioning block 25 to retract into the sliding hole 24 and squeeze the push springs 26, so that the positioning block 25 is disengaged from the positioning groove 27. When it moves to the next set of positioning grooves 27, the multiple sets of push springs 26 push the positioning block 25 to abut against the positioning groove 27 again.

[0041] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A vibration testing fixture, comprising a base (1), characterized in that: The base (1) is provided with a clamping mechanism, which includes a fixing plate (2), a cylinder (3), a connecting sleeve (4), a guide sleeve (5), a push rod (6), a top block (7), and an adapter mechanism. The fixing plate (2) is provided with multiple sets of fixings on the top surface of the base (1), the cylinder (3) is fixed between multiple sets of fixing plates (2), the connecting sleeve (4) is fixed at the telescopic end of multiple sets of cylinders (3), the guide sleeve (5) is provided with multiple sets of fixings on the inner wall of the connecting sleeve (4), the push rod (6) slides in multiple sets of guide sleeves (5), and the top block (7) is fixed at the top of multiple sets of push rods (6).

2. The vibration testing fixture according to claim 1, characterized in that: The adapter mechanism includes a limiting ring (8), a connecting plate (9), and a reset spring (10). The limiting ring (8) is fixed to the inner wall of the connecting sleeve (4) and is slidably connected to multiple sets of top rods (6). The connecting plate (9) is fixed to the bottom of multiple sets of top rods (6). The reset spring (10) is set on the outer wall of multiple sets of top rods (6) and is connected to multiple sets of connecting plates (9) and the limiting ring (8).

3. A vibration testing fixture according to claim 2, characterized in that: multiple sets The outer side of the guide sleeve (5) is provided with guide grooves (11), and the outer walls of the multiple sets of top rods (6) are fixed with guide plates (12), and the multiple sets of guide plates (12) are slidably connected to the multiple sets of guide grooves (11).

4. A vibration testing fixture according to claim 3, characterized in that: Each of the multiple sets of top rods (6) has a rubber block (13) fixedly installed at its top end.

5. A vibration testing fixture according to claim 4, characterized in that: The connecting sleeve (4) is provided with a fastening mechanism on its outer side. The fastening mechanism includes a sliding groove (14), a sliding sleeve (15), a push ring (16), an inclined groove (17), an inclined block (18), and an abutment block (19). The sliding groove (14) is provided in multiple sets distributed on the outer side of the connecting sleeve (4). The sliding sleeve (15) slides in multiple sets of sliding grooves (14). The push ring (16) is fixed on the inner side of the sliding sleeve (15). The inclined groove (17) is provided in multiple sets distributed on the inner wall of the connecting sleeve (4). The inclined block (18) slides in multiple sets of inclined grooves (17). The abutment block (19) is fixed on the inner side of multiple sets of inclined blocks (18).

6. A vibration testing fixture according to claim 5, characterized in that: The inner side of each of the multiple sets of abutment blocks (19) is provided with a groove that matches the top rod (6).

7. A vibration testing fixture according to claim 6, characterized in that: The outer side of the sliding sleeve (15) is fixedly provided with a mating sleeve (20), the outer wall of the connecting sleeve (4) is rotatably provided with a rotating sleeve (21), the outer side of the rotating sleeve (21) is connected with a threaded sleeve (22), and the threaded sleeve (22) is threadedly connected to the mating sleeve (20).

8. A vibration testing fixture according to claim 7, characterized in that: The rotating sleeve (21) is fixedly provided with a positioning sleeve (23) on the outside. The inner wall of the positioning sleeve (23) is provided with a sliding hole (24). Multiple sets of sliding holes (24) are provided on the inner side of the positioning sleeve (23). Positioning blocks (25) are slidably provided in the multiple sets of sliding holes (24). Push springs (26) are connected between the top of the multiple sets of positioning blocks (25) and the inner side of the sliding hole (24). The outer wall of the connecting sleeve (4) is provided with a positioning groove (27). Multiple sets of positioning grooves (27) are provided and abut against the multiple sets of positioning blocks (25) respectively.

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