A highly stable mechanical high-frequency vibration table

Abstract

This application discloses a highly stable mechanical high-frequency vibration table, including a mounting base and a mounting frame. The mounting base and the mounting frame are connected by multiple surrounding frame connection mechanisms. Each frame connection mechanism includes a connecting block, a lower connecting plate, and an upper connecting plate that are hinged sequentially. The connecting block is fixed to the mounting base. One end of the lower connecting plate is hinged to the connecting block, and the other end is connected to one end of the upper connecting plate through complementary concave-convex structures and sliding pairs. This application, through an innovative "hinged-sliding pair-hinged" composite connection mechanism design, effectively constrains the lateral and rotational degrees of freedom while ensuring axial vibration freedom. The multi-degree-of-freedom constraint mechanism significantly improves the overall stiffness and stability of the system during high-frequency operation, eliminates parasitic vibrations and redundant modes, ensures that the vibration table surface maintains a pure axial motion trajectory, and greatly improves testing accuracy.

Description

Technical Field

[0001] This application relates to the field of vibration testing technology, specifically a highly stable mechanical high-frequency vibration table. Background Technology

[0002] Mechanical vibration tables, as core equipment for environmental simulation and reliability testing, are widely used in product vibration testing in fields such as aerospace, automotive engineering, electronics, and packaging and transportation. Their basic principle is to generate controllable vibration signals through a vibrator, driving the mounting platform to simulate the vibration environment under actual working conditions, thereby verifying the product's vibration resistance and structural reliability.

[0003] In existing technologies, traditional mechanical vibration tables often face numerous technical challenges under high-frequency conditions. The vibrator and the table surface typically employ a rigid connection structure, making it difficult to completely eliminate installation alignment errors. This structure is prone to off-center loading and bending moments during high-frequency reciprocating motion, leading not only to vibration direction deviation and waveform distortion but also accelerating fatigue damage to the vibrator and transmission structure, thus reducing equipment lifespan. Secondly, common guide mechanisms connecting the base and the movable table surface include spring-guided systems and ordinary linkage hinge mechanisms. Spring-guided systems exhibit poor stability near the resonant frequency, easily inducing lateral drift; ordinary hinge mechanisms cannot effectively constrain non-axial degrees of freedom, easily inducing vibrations during high-frequency operation. Summary of the Invention

[0004] The technical problem to be solved by this application is to overcome the existing defects and provide a highly stable mechanical high-frequency vibration table, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution: a highly stable mechanical high-frequency vibration table, comprising a mounting base and a mounting frame, wherein the mounting base and the mounting frame are connected by a plurality of surroundingly distributed frame connection mechanisms, each frame connection mechanism comprising a connecting support block, a lower connecting plate, and an upper connecting plate hinged sequentially; the connecting support block is fixed on the mounting base, one end of the lower connecting plate is hinged to the connecting support block, and the other end is connected to one end of the upper connecting plate through a complementary concave-convex structure and a sliding pair, the other end of the upper connecting plate being hinged to the mounting frame; the concave-convex structure includes a groove and a top plate disposed at the mating ends of the lower connecting plate and the upper connecting plate, the top plate of one plate fitting into the groove of the other plate, and a blind hole provided in the groove, the top plate being provided with a limiting top shaft corresponding to the blind hole; a vibrator mounting frame is provided in the central area of ​​the mounting base, a vibrator is mounted on the vibrator mounting frame, and the output end of the vibrator is connected to the mounting frame.

[0006] As a preferred technical solution of this application, the mounting base is provided with a plurality of mounting grooves evenly distributed in a ring, and the connecting support block is fixed in each mounting groove.

[0007] As a preferred technical solution of this application, the lower connecting plate and the upper connecting plate are slidably connected by a guide groove and a guide block structure, with the guide groove and the guide block respectively disposed on the mating surface of the two.

[0008] As a preferred technical solution of this application, the lower end of the mounting frame is provided with a plurality of connecting hinge seats evenly distributed in a ring, and each of the connecting hinge seats is hinged to the end of the upper connecting plate.

[0009] As a preferred technical solution of this application, an intermediate support plate is fixed inside the annular structure of the mounting base, the vibrator mounting frame is mounted on the intermediate support plate, the vibrator mounting frame includes a universal ball mounting seat and a workpiece mounting cavity disposed at its movable end, the fixed end of the universal ball mounting seat is connected to the intermediate support plate, and the vibrator is mounted in the workpiece mounting cavity.

[0010] As a preferred technical solution of this application, the output end of the vibrator is connected to the connecting seat at the lower end of the mounting frame via a universal joint or flexible coupling.

[0011] Compared with the prior art, the beneficial effects of this application are: This application, through the innovative "hinged-sliding pair-hinged" composite connection mechanism design, effectively constrains the lateral movement and rotational degrees of freedom while ensuring the axial vibration degree of freedom. The multi-degree-of-freedom constraint mechanism significantly improves the overall stiffness and stability of the system when working at high frequency, eliminates parasitic vibration and redundant modes, ensures that the vibration table maintains a pure axial motion trajectory, and greatly improves the testing accuracy and mechanical stability of the equipment.

[0012] The omnidirectional ball mount forms an efficient power transmission path, which can adaptively compensate for installation alignment errors, effectively eliminate off-center loads and additional bending moments, improve the transmission efficiency of vibration energy, and significantly extend the service life of the exciter and the overall structure.

[0013] The ring-shaped, evenly distributed multi-point connection mechanism and the distributed hinge design create a symmetrical and stable force system for the vibration table. This structural layout not only improves overall rigidity but also evenly distributes the load, adapting to test workpieces of different weights and sizes while maintaining stable vibration performance. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this application;

[0015] Figure 2 This is the main view of this application;

[0016] Figure 3 This is a schematic diagram of the mounting base structure;

[0017] Figure 4 This is a schematic diagram of the assembly cross-section of the lower connecting plate and the upper connecting plate;

[0018] Figure 5 This is a schematic diagram of the upper connecting plate structure.

[0019] In the diagram: 1. Mounting frame, 2. Mounting base, 3. Vibrator mounting bracket, 4. Intermediate support plate, 5. Connecting support block, 6. Vibrator, 7. Lower connecting plate, 8. Upper connecting plate, 9. Connecting hinge seat. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application (for ease of description and understanding, hereinafter referred to as...), Figure 2 (The above is described above). All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0021] Please see Figure 1-5 This application provides a technical solution: a highly stable mechanical high-frequency vibration table, which has a stable overall structure and can effectively transmit high-frequency vibration signals.

[0022] The vibration table mainly consists of a mounting base 2 and a mounting frame 1, which form the basic frame. The mounting base 2 is the load-bearing foundation of the equipment, and the mounting frame 1 is located above the mounting base 2 to support and fix the workpiece to be tested. The connection is achieved through a frame connection mechanism.

[0023] The frame connection mechanism includes a connecting support block 5, a lower connecting plate 7, and an upper connecting plate 8 that are hinged together in sequence. The connecting support block 5 is firmly fixed to the mounting base 2. One end of the lower connecting plate 7 is hinged to the connecting support block 5, and the other end is connected to the upper connecting plate 8 through a concave-convex structure. The other end of the upper connecting plate 8 is hinged to the mounting frame 1, thus forming a complete force transmission path.

[0024] The connection between the lower connecting plate 7 and the upper connecting plate 8 adopts a complementary concave-convex structure with a sliding pair design. Specifically, the mating ends of the two plates are respectively provided with a groove and a top plate, with the top plate of one plate precisely embedded in the groove of the other plate to achieve a tight fit.

[0025] Blind holes are specially designed inside the groove, and a limiting top shaft corresponding to the blind holes is installed on the top plate.

[0026] The vibration system is located in the central area of ​​the mounting base 2 and includes a vibrator mounting frame 3 and a vibrator 6. The vibrator mounting frame 3 provides a stable mounting platform for the vibrator 6, which is the power source for the entire system. Its output end is directly connected to the mounting frame 1 to ensure the effective transfer of vibration energy.

[0027] Multiple mounting slots are evenly distributed in a ring on the mounting base 2, each slot ensuring that the connecting support block 5 can be securely installed. The connecting support block 5 is fixed in the corresponding mounting slot by fasteners. The distributed installation improves the stability of the overall structure and facilitates later maintenance and adjustment.

[0028] The sliding connection between the lower connecting plate 7 and the upper connecting plate 8 further employs a guide groove and guide block structure. The guide groove and guide block are precision-machined onto their mating surfaces; the guide groove is a recessed structure, and the guide block is a protruding structure. Together, they form a precise sliding pair. This ensures that the two plates can slide relative to each other while maintaining good guidance and stability, thereby improving the overall working accuracy of the vibration table.

[0029] Multiple connecting hinge seats 9 are evenly distributed in a ring at the lower end of the mounting frame 1. Each connecting hinge seat 9 is precision machined and has a standard hinge structure. The ends of the upper connecting plate 8 are respectively hinged to these connecting hinge seats 9. This multi-point hinge design greatly improves the reliability of the connection and the load distribution capability.

[0030] An intermediate support plate 4 is fixedly installed inside the annular structure of the mounting base 2, serving as the supporting foundation for the vibrator mounting frame 3. The vibrator mounting frame 3 adopts a universal ball joint mounting structure, which includes a fixed end and a movable end. The fixed end is firmly connected to the intermediate support plate 4, and the movable end has a workpiece mounting cavity, in which the vibrator 6 is installed.

[0031] The universal ball mount allows the vibrator 6 to be finely adjusted in multiple directions, thus adapting to different working requirements and installation conditions. The output end of the vibrator 6 is connected to the connecting seat at the lower end of the mounting frame 1 via a universal joint or flexible coupling, which ensures effective power transmission and provides a certain degree of flexible compensation capability, enabling it to adapt to minor displacements and angular deviations that may occur during system operation.

[0032] During operation: The high-frequency excitation force generated by the vibrator 6 is axially transmitted to the mounting frame 1 through the universal joint, driving it to perform high-frequency reciprocating motion. The power of the mounting frame 1 is transmitted to the mounting base 2 through multiple evenly distributed frame connection mechanisms. During vibration transmission, the connecting support block 5 provides a stable support point. The lower connecting plate 7 and the upper connecting plate 8, through a combination of hinges and sliding pairs, ensure accurate transmission of vibration signals. Each hinge point allows for small angle changes during vibration, while the sliding pairs ensure that vibration energy is mainly transmitted axially and constrain lateral movement. The limiting top shaft in the concave-convex structure effectively absorbs the small impacts and noise generated by high-frequency vibration, further stabilizing the system. Multiple connecting hinge seats 9 disperse stress, ensuring that the vibration table maintains good stability and accuracy under high-frequency operating conditions. The use of universal ball mounts and universal joints ensures that the output force of the vibrator 6 is well aligned with the load of the mounting frame 1, improving the transmission efficiency and operational smoothness of the entire system.

[0033] Although embodiments of this application 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 application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A highly stable mechanical high-frequency vibration table, comprising a mounting base (2) and a mounting frame (1), characterized in that: The mounting base (2) and the mounting frame (1) are connected by multiple surrounding frame connection mechanisms. The frame connection mechanism includes a connecting support block (5), a lower connecting plate (7), and an upper connecting plate (8) that are hinged in sequence. The connecting support block (5) is fixed on the mounting base (2). One end of the lower connecting plate (7) is hinged to the connecting support block (5), and the other end is connected to one end of the upper connecting plate (8) through a complementary concave-convex structure and a sliding pair. The other end of the upper connecting plate (8) is hinged to the mounting frame (1). The concave-convex structure includes a groove and a top plate provided at the mating end of the lower connecting plate (7) and the upper connecting plate (8). The top plate of one is fitted into the groove of the other, and a blind hole is provided in the groove. A limiting top shaft corresponding to the blind hole is provided on the top plate. A vibrator mounting frame (3) is provided in the central area of ​​the mounting base (2). A vibrator (6) is installed on the vibrator mounting frame (3), and the output end of the vibrator (6) is connected to the mounting frame (1).

2. The high-stability mechanical high-frequency vibration table according to claim 1, characterized in that: The mounting base (2) has multiple mounting grooves evenly distributed in a ring, and the connecting support block (5) is fixed in each mounting groove.

3. The high-stability mechanical high-frequency vibration table according to claim 1, characterized in that: The lower connecting plate (7) and the upper connecting plate (8) are slidably connected by a guide groove and a guide block structure, with the guide groove and the guide block respectively set on the mating surface of the two.

4. The high-stability mechanical high-frequency vibration table according to claim 1, characterized in that: The lower end of the mounting frame (1) is provided with a plurality of connecting hinge seats (9) arranged in a ring, and each of the connecting hinge seats (9) is hinged to the end of the upper connecting plate (8).

5. The high-stability mechanical high-frequency vibration table according to claim 1, characterized in that: An intermediate support plate (4) is fixed inside the annular structure of the mounting base (2), and the vibrator mounting frame (3) is mounted on the intermediate support plate (4). The vibrator mounting frame (3) includes a universal ball mounting seat and a workpiece mounting cavity located at its movable end. The fixed end of the universal ball mounting seat is connected to the intermediate support plate (4), and the vibrator (6) is mounted in the workpiece mounting cavity.

6. The high-stability mechanical high-frequency vibration table according to claim 5, characterized in that: The output end of the vibrator (6) is connected to the connecting seat at the lower end of the mounting frame (1) via a universal joint or flexible coupling.

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