Electromagnetic vibration table

Abstract

The utility model discloses an electromagnetic type vibration table in the vibration table field, including underframe, placing table, vibration subassembly and control panel, vibration subassembly includes fixed mount, first iron box and second iron box, first iron box is equipped with the one end of fixed mount through screw, fixed mount bottom is equipped with the bearing plate, and the bearing plate is equipped with the bearing plate through screw. The second iron box is installed at the top of the bearing plate through screws, a moving coil is arranged in the first iron box, a magnet exciting coil is arranged in the second iron box, the surface of the placing table is recessed inwards to form a limiting groove used for placing a test sample, and a clamping assembly is arranged on the surface of the placing table; according to the electromagnetic vibration table, a test sample is preliminarily positioned through the limiting groove in the surface of the placement table, the sample is effectively prevented from moving in the vibration process, and rapid clamping can be achieved through threaded connection and sliding fit by adopting a double-fixing structure of a screw rod-clamping plate and a sliding rail-pressing plate.

Description

Technical Field

[0001] This utility model relates to the field of vibration tables, specifically an electromagnetic vibration table. Background Technology

[0002] With the rapid development of industries such as electronics and automotive parts, the simulation testing of vibration environments experienced by products during transportation or use has become particularly important. Electromagnetic vibration tables, due to their wide frequency range and controllable vibration waveforms, have become one of the core devices for aging testing. This type of equipment is used to detect early faults, simulate actual working conditions, and conduct structural strength tests. It has a wide range of applications, broad applicability, significant testing results, and high reliability. Vibration testing is a stress test of a product, and also a test of premature aging during actual operation. The core structure of an electromagnetic vibration table includes an excitation coil, a moving coil, a vibration table surface, and a control system. The excitation coil generates a magnetic field, in which the moving coil experiences electromagnetic force, and the vibration table surface transmits the vibration. Its working principle is mainly based on electromagnetic induction. A constant magnetic field is generated by passing direct current through the excitation coil, and an alternating current is passed through the moving coil, which experiences periodically changing electromagnetic force in the magnetic field, thus generating vibration. By adjusting the magnitude and frequency of the current in the excitation coil, the vibration amplitude and frequency of the moving coil can be controlled. The vibration generation process is as follows: the control panel sets the vibration parameters, the signal generator or power amplifier converts the control signal into a drive signal, the drive signal acts on the moving coil to generate electromagnetic force, and drives the vibration table to vibrate.

[0003] Existing electromagnetic vibration tables also have the following drawbacks: Traditional vibration tables mostly use a smooth platform to directly place the sample. The platform surface is a smooth plane and lacks physical constraint structures such as limiting grooves and guards. The test sample is placed naturally by gravity alone. Under high acceleration vibration, the slight unevenness in the contact area between the sample and the platform surface is insufficient to provide effective resistance, and under high frequency vibration, it is easy for the sample to slip or even fall off. Utility Model Content

[0004] In order to overcome the shortcomings of existing technical solutions, this utility model provides an electromagnetic vibration table, which can effectively solve the technical problem that existing vibration tables are prone to causing test samples to fall off the vibration table because they lack clamping components to hold the test samples.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an electromagnetic vibration table, including a base frame, a placement platform, a vibration assembly, and a control panel. The vibration assembly includes a fixed frame, a first iron box, and a second iron box. The first iron box is installed at one end of the fixed frame by screws. A load-bearing plate is provided at the bottom of the fixed frame. The second iron box is installed at the top of the load-bearing plate by screws. A moving coil is provided inside the first iron box, and an excitation coil is provided inside the second iron box. The surface of the placement platform is recessed inward to form a limiting groove for placing test samples. A clamping assembly is provided on the surface of the placement platform. The clamping assembly includes a fixed plate fixedly installed on the top of the placement platform, a detachable positioning plate, and a screw. One end of the screw passes through the fixed plate and extends to the outside of the fixed plate. The screw is threadedly connected to the fixed plate. A clamping plate is fixedly installed at one end of the screw. A slide rail is fixedly installed on the surface of the positioning plate. The slide rail extends along the length direction of the positioning plate. A slidable slider is provided on the surface of the slide rail. The slider is slidably connected to the slide rail. A pressing plate is provided at one end of the slider.

[0006] Furthermore, a push block is provided at one end of the screw, and a long bolt is provided at one end of the fixing plate. The positioning plate is threadedly connected to the fixing plate through the long bolt.

[0007] Furthermore, a magnetic guide plate is provided at one end of the fixing frame, and the magnetic guide plate is composed of several silicon steel sheets stacked together.

[0008] Furthermore, a number of connecting rods are fixedly installed on the top surface of the base frame, and adjacent connecting rods are symmetrically arranged. One end of each connecting rod is fixedly connected to the placement platform.

[0009] Furthermore, two reinforcing plates are installed on the top of the fixing frame by screws and welded together. Two vibration plates are provided on the top of the reinforcing plates, and fasteners that penetrate the vibration plates are provided on the bottom of the reinforcing plates. Both vibration plates are threadedly connected to the reinforcing plates by fasteners.

[0010] Furthermore, a connecting block is provided on the top of the vibrating plate, and one end of the connecting block is connected to the placement platform.

[0011] Furthermore, the bottom of the base frame is fixedly provided with several feet, which are evenly distributed between adjacent feet and are all on the same horizontal plane.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides an electromagnetic vibration table, which uses the limiting groove on the table surface to initially position the test sample, effectively preventing the sample from shifting during vibration. It adopts a double-fixed structure of screw-clamping plate and slide rail-pressing plate, which can achieve quick clamping through threaded connection and sliding fit, and can stably clamp the test sample, improve test stability, and prevent the test sample from slipping or falling out. Attached Figure Description

[0013] Figure 1 This is a front view of an electromagnetic vibration table according to the present invention.

[0014] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0015] Figure 3 for Figure 1 A magnified view of a section at point B.

[0016] Numbering on the map:

[0017] 1-Base frame; 2-Clamping assembly; 201-Fixing plate; 202-Push block; 203-Screw; 204-Long bolt; 205-Positioning plate; 206-Clamping plate; 207-Pressing plate; 208-Slide rail; 209-Slider; 3-Connecting rod; 4-Foot; 5-Bearing plate; 6-Second iron box; 7-Excitation coil; 8-Fixing frame; 9-Magnetic guide plate; 10-First iron box; 11-Vibration plate; 12-Reinforcing plate; 13-Placement platform; 14-Limiting groove; 15-Connecting block; 16-Moving coil; 17-Fastener. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] The following is combined Figures 1-3 A detailed description of an electromagnetic vibration table according to this utility model is provided:

[0020] An electromagnetic vibration table includes a base frame 1, a placement platform 13, a vibration assembly, and a control panel (not shown). The vibration assembly includes a fixed frame 8, a first iron box 10, and a second iron box 6. The first iron box 10 is screwed to one end of the fixed frame 8. A load-bearing plate 5 is provided at the bottom of the fixed frame 8. The second iron box 6 is screwed to the top of the load-bearing plate 5. A moving coil 16 is provided inside the first iron box 10, and an excitation coil 7 is provided inside the second iron box 6. The surface of the placement platform 13 is recessed inward to form a limiting groove 14 for placing test samples. A clamping assembly 2 is provided on the surface of the placement platform 13. The clamping assembly 2 includes a fixed... A fixed plate 201, a detachable positioning plate 205, and a screw 203 are fixedly installed on the top of the placement platform 13. One end of the screw 203 passes through the fixed plate 201 and extends to the outside of the fixed plate 201. The screw 203 is threadedly connected to the fixed plate 201. A clamping plate 206 is fixedly installed on one end of the screw 203. A slide rail 208 is fixedly installed on the surface of the positioning plate 205. The slide rail 208 extends along the length direction of the positioning plate 205. A slidable slider 209 is provided on the surface of the slide rail 208. The slider 209 is slidably connected to the slide rail 208. A pressing plate 207 is provided on one end of the slider 209.

[0021] One end of the screw 203 is provided with a push block 202, and one end of the fixing plate 201 is provided with a long bolt 204. The positioning plate 205 is threadedly connected to the fixing plate 201 via the long bolt 204. One end of the fixing frame 8 is provided with a magnetic plate 9, which is composed of several layers of silicon steel sheets. Several connecting rods 3 are fixedly provided on the top surface of the base frame 1. Adjacent connecting rods 3 are symmetrically arranged. One end of each connecting rod 3 is fixedly connected to the placement platform 13. Two reinforcing plates are installed on the top of the fixing frame 8 by screws. 12. Two reinforcing plates 12 are welded together. Two vibrating plates 11 are provided on the top of the reinforcing plate 12. Fasteners 17 are provided on the bottom of the reinforcing plate 12 and pass through the vibrating plates 11. Both vibrating plates 11 are threadedly connected to the reinforcing plate 12 by the fasteners 17. A connecting block 15 is provided on the top of the vibrating plate 11. One end of the connecting block 15 is connected to the placement platform 13. Several feet 4 are fixedly provided on the bottom of the base frame 1. Adjacent feet 4 are evenly distributed and are all on the same horizontal plane.

[0022] The separate layout of the first iron box 10 and the second iron box 6, combined with the support structure of the load-bearing plate 5, reduces the risk of magnetic leakage and improves the utilization rate of the magnetic field. The positioning plate 205 and the fixing plate 201 can be quickly disassembled and assembled by the long bolts 204. The use of the stacked silicon steel sheet structure significantly reduces eddy current loss and improves magnetic conductivity, so that the vibration table can maintain a stable magnetic field strength under high-frequency vibration. Multiple symmetrically distributed connecting rods 3 form a support structure, effectively dispersing the vibration load and improving the overall structural rigidity. The reinforcing plate 12 and the threaded vibration plate 11 form a double reinforcement, which not only ensures the structural strength but also facilitates the improvement of vibration effect. The vibration plate 11 is independently connected to the placement platform 13 through the connecting block 15 to achieve accurate transmission of vibration energy and reduce energy loss. The evenly distributed feet 4 ensure the stability of the center of gravity of the vibration table, effectively preventing shaking during vibration and improving the test accuracy.

[0023] In practical use, the test sample to be tested is placed in the limiting groove 14 inside the placement stage 13. By manually adjusting the push block 202, the screw 203 is rotated, causing the clamping plate 206 to fix and clamp the test sample. The slider 209 is manually slid, causing it to move along the slide rail 208, so that the pressing plate 207 presses the test sample, making the test sample clamped more stably. The control panel outputs a low voltage control signal, which is amplified into a high voltage, high current signal by the power amplifier. The excitation coil 7 adjusts its current intensity to control the strength of the magnetic field. The moving coil 16 adjusts the frequency and amplitude of the AC current to control the excitation force of the vibration table, thereby simulating the vibration environment of the test sample and testing the vibration resistance of the test sample. The electromagnetic vibration table is existing technology. Components and circuit connections not described in detail in this article are all existing technologies, and their working principles will not be elaborated here.

[0024] In this embodiment, the electromagnetic vibration table further includes: a power supply module (such as a high-frequency switching power supply or a power amplifier) ​​that provides a stable current to the excitation coil 7 and the moving coil 16, ensuring that the magnetic field strength is adjustable; a signal generator (connected to the control panel) that generates vibration excitation signals of specific frequencies and waveforms (such as sine waves or random waves) to drive the moving coil 16 to move; and a cooling fan (installed near the excitation coil 7) that provides forced air cooling to prevent the electromagnetic components from overheating.

[0025] This embodiment of an electromagnetic vibration table uses a limiting groove 14 on the surface of the placement platform 13 to initially position the test sample, effectively preventing the sample from shifting during vibration. It adopts a double-fixed structure of screw 203-clamping plate 206 and slide rail 208-pressing plate 207, which can achieve quick clamping through threaded connection and sliding fit, and can stably clamp the test sample, improve test stability, and prevent the test sample from slipping or falling out.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An electromagnetic vibration table, comprising a base frame, a placement platform, a vibration assembly, and a control panel, wherein the vibration assembly comprises a fixed frame, a first iron box, and a second iron box, the first iron box being mounted to one end of the fixed frame by screws, a load-bearing plate being provided at the bottom of the fixed frame, the second iron box being mounted to the top of the load-bearing plate by screws, a moving coil being disposed inside the first iron box, and an excitation coil being disposed inside the second iron box, characterized in that: The surface of the placement stage is recessed inward to form a limiting groove for placing the test sample. The surface of the placement stage is provided with a clamping assembly, which includes a fixed plate fixedly mounted on the top of the placement stage, a detachable positioning plate, and a screw. One end of the screw passes through the fixed plate and extends to the outside of the fixed plate. The screw is threadedly connected to the fixed plate. One end of the screw is fixedly mounted with a clamping plate. The surface of the positioning plate is fixedly mounted with a slide rail, which extends along the length of the positioning plate. The surface of the slide rail is provided with a slidable slider, which is slidably connected to the slide rail. One end of the slider is provided with a pressing plate.

2. The electromagnetic vibration table according to claim 1, characterized in that: One end of the screw is provided with a push block, and one end of the fixing plate is provided with a long bolt. The positioning plate is threadedly connected to the fixing plate by the long bolt.

3. The electromagnetic vibration table according to claim 1, characterized in that: A magnetic plate is provided at one end of the fixing frame, and the magnetic plate is composed of several silicon steel sheets stacked together.

4. The electromagnetic vibration table according to claim 1, characterized in that: Several connecting rods are fixedly installed on the top surface of the base frame. The adjacent connecting rods are symmetrically arranged, and one end of each connecting rod is fixedly connected to the placement platform.

5. The electromagnetic vibration table according to any one of claims 1 to 4, characterized in that: The top of the fixing frame is fitted with two reinforcing plates by screws and welded together. Two vibration plates are set on the top of the reinforcing plates and fasteners that pass through the vibration plates are set on the bottom of the reinforcing plates. Both vibration plates are threadedly connected to the reinforcing plates by fasteners.

6. The electromagnetic vibration table according to claim 5, characterized in that: A connecting block is provided on the top of the vibrating plate, and one end of the connecting block is connected to the placement platform.

7. The electromagnetic vibration table of claim 1, wherein: The bottom of the base frame is fixedly provided with several feet, which are evenly distributed between adjacent feet and are all on the same horizontal plane.

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