Guide mechanism of vibration test bench and vibration test bench

Abstract

The utility model discloses a guide mechanism of a vibration test bench. The guide mechanism comprises an upper guide mechanism and a lower guide mechanism. The upper guide mechanism comprises a plurality of tension spring guide assemblies and a plate spring guide assembly, each tension spring guide assembly comprises a tension spring body, each plate spring guide assembly comprises a plate spring body, and the lower guide mechanism comprises a guide column. The vibration test bench further comprises a bench body, an inner drive and a moving coil, at least part of the moving coil is located in the bench body and can move in the vertical direction, the moving coil is connected with an upper cover plate of the bench body through plate spring guide assemblies and tension spring guide assemblies which are evenly distributed in the circumferential direction of the moving coil, and the vertically-arranged guide columns are inserted in the inner drive. According to the utility model, the movement direction of the moving coil can be limited, so that the vibration test bench has good lateral ratio, uniformity and frequency response when in use, and the precision of the vibration bench during testing is improved.

Description

Technical Field

[0001] This utility model relates to the field of vibration testing platform technology, and in particular to a guide mechanism for a vibration testing platform and a vibration testing platform. Background Technology

[0002] An electric vibration table is an electromechanical device that converts electric current into the excitation force required for vibration testing. It can perform vibration simulation experiments on products or objects, and through such tests, the seismic performance of a product can be evaluated, providing a reasonable basis for assessing the quality of the product. Therefore, it is widely used in aerospace, aviation, shipbuilding, automotive, electronics, communications, home appliances, and instrumentation industries.

[0003] An electric vibration table is designed based on the principle of electromagnetic vibration. Its structure mainly consists of a table body, magnets, excitation windings, a moving coil, a suspension bracket, a guiding device, and a cooling system. The basic working principle is as follows: a constant magnetic field is generated by passing a direct current through the excitation winding placed inside the magnets. The moving coil is positioned within this constant magnetic field. Due to the interaction between the alternating current and the constant magnetic field, an excitation force that varies with the magnitude and direction of the current is generated, driving the moving coil to vibrate back and forth around the vibration center. In the design and manufacture of the vibration table, the guidance of the moving coil is particularly important, as it directly affects the distortion index of the table body and the testing accuracy.

[0004] Therefore, a guiding mechanism for a vibration test bench is needed to solve the above problems. Utility Model Content

[0005] To overcome the above-mentioned shortcomings, the purpose of this utility model is to provide a guiding mechanism for a vibration test bench and a vibration test bench, which can limit the movement direction of the moving coil, so that the vibration test bench has good lateral ratio, uniformity and frequency response when used, and improves the accuracy of vibration test.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a guiding mechanism for a vibration test bench, comprising an upper guiding mechanism and a lower guiding mechanism; the upper guiding mechanism includes several tension spring guiding assemblies and leaf spring guiding assemblies, each tension spring guiding assembly including a tension spring body, each leaf spring guiding assembly including a leaf spring body, and the lower guiding mechanism including a guide post. The dual guiding mechanism, installed on the vibration test bench, determines the trajectory of the moving coil during subsequent testing of the sample, thereby ensuring the moving coil always moves along the lateral and longitudinal paths, resulting in good lateral ratio, uniformity, and frequency response of the vibration test bench during use.

[0007] Furthermore, the tension spring body is made of rubber. This gives the tension spring body good elasticity and makes it less prone to damage even after prolonged use.

[0008] A vibration test bench includes a guiding mechanism, a bench body, an excitation magnet, an inner drive, and a moving coil. The moving coil is at least partially located within the bench body and can move vertically. The moving coil is connected to the upper cover plate of the bench body via leaf spring guide assemblies and tension spring guide assemblies evenly distributed along its circumference. A vertically arranged guide post is inserted into the inner drive and slidably connected to it via a bearing. One end of the guide post extending upward out of the inner drive is detachably fixed to the bottom of the moving coil.

[0009] Furthermore, the tension spring guide assembly includes a tension spring body, the two ends of which are connected to the upper cover plate and the outer periphery of the moving coil via a left mounting seat and a right mounting seat, respectively. The leaf spring guide assembly includes a leaf spring body, the two ends of which are stretched are connected to the upper cover plate and the outer periphery of the moving coil via a first fixed mounting seat and a second fixed mounting seat, respectively.

[0010] The upper surface of the cover plate is recessed downwards and has several mounting slots for mounting the left mounting seat and the first fixed mounting seat. In order to facilitate the subsequent replacement of the leaf spring body and the tension spring body, the left mounting seat and the first fixed mounting seat are respectively fixed in the above-mentioned mounting slots with screws, while the right mounting seat and the second fixed mounting seat are fixed to the outer periphery of the moving coil with screws.

[0011] Furthermore, the top of the moving coil has several mounting holes for easy installation of the sample to be tested, and the outer periphery of the moving coil has several stiffening plates arranged on the stiffening plates at intervals. Specifically, the mounting holes can be threaded holes, allowing the sample to be directly attached to the moving coil with screws, enabling rapid assembly and disassembly of the sample for testing and effectively improving the efficiency of vibration testing.

[0012] Furthermore, the platform includes an upper cover plate and a lower cover plate, which are fixedly connected to the upper cover plate via multiple stacked connecting cover plates. The inner drive is fixed to the upper surface of the lower cover plate. This ensures the stability of the overall structure of the vibration test platform during vibration testing.

[0013] Furthermore, it also includes an airbag. When the moving coil moves downward, the top of the airbag can abut against the lower surface of the guide post to buffer the impact caused by vibration. An installation chamber for placing the airbag is opened inside the inner drive.

[0014] Furthermore, the platform also includes an external drive, which is sleeved outside the induction ring, and the induction ring is made of aluminum. The aluminum induction ring has high thermal conductivity, electrical conductivity, and cost-effectiveness. The moving coil is made of forged aluminum, unlike the moving coil of a direct-coupled vibration table, and its interior does not carry water or electricity.

[0015] The beneficial effects of this utility model are:

[0016] In this invention, the moving coil, the upper guide mechanism, and the lower guide mechanism work together. The tension spring body and the leaf spring body, which are evenly distributed around the outer periphery of the moving coil, work together with the guide post to effectively limit the movement direction of the moving coil and determine its movement path. This gives the vibration test bench good lateral ratio, uniformity, and frequency response, thus improving the accuracy of vibration test. Attached Figure Description

[0017] Figure 1 This is an isometric view of the overall structure of a vibration testing bench according to an embodiment of the present invention;

[0018] Figure 2 This is an isometric view of the overall structure of the upper guide mechanism according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic cross-sectional view of the overall structure of the vibration test bench according to an embodiment of the present invention;

[0020] In the diagram: 1. Platform; 2. Upper cover plate; 3. Excitation; 4. Connecting cover plate; 5. Airbag; 6. Lower cover plate; 7. Moving coil; 71. Mounting hole; 72. Rib plate; 8. Upper guide mechanism; 81. Tension spring guide assembly; 811. Tension spring body; 812. Left mounting seat; 813. Right mounting seat; 82. Leaf spring guide assembly; 821. Fixed mounting seat one; 822. Fixed mounting seat two; 823. Leaf spring body; 9. Lower guide mechanism; 91. Guide post; 92. Bearing; 10. Internal drive; 101. Mounting chamber; 11. External drive; 12. Induction ring. Detailed Implementation

[0021] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0022] See appendix Figures 1 to 3 As shown, the guiding mechanism of a vibration test bench in this embodiment includes an upper guiding mechanism 8 and a lower guiding mechanism 9. The upper guiding mechanism 8 includes several tension spring guiding assemblies 81 and leaf spring guiding assemblies 82. The tension spring guiding assembly 81 includes a tension spring body 811, and the leaf spring guiding assembly 82 includes a leaf spring body 823. The lower guiding mechanism 9 includes a guide post 91. The dual guiding mechanisms, installed on the vibration test bench, determine the movement trajectory of the moving coil 7 during subsequent testing of the sample to be tested, thereby ensuring that the moving coil 7 always moves along the lateral and longitudinal paths. This results in the vibration test bench having good lateral ratio, uniformity, and frequency response during use.

[0023] The tension spring body 811 is made of rubber. This gives the tension spring body 811 good elasticity and makes it less prone to damage even after long-term use.

[0024] See appendix Figures 1 to 3 A vibration test bench includes the aforementioned guiding mechanism, and also includes a bench body 1, an excitation 3, an internal drive 10, and a moving coil 7. The moving coil 7 is at least partially located within the bench body 1 and can move in the vertical direction. Specifically, a portion of the moving coil 7 along its height direction is placed within the bench body 1.

[0025] During operation, the excitation 3 is responsible for generating driving force. The induction ring 12 senses the change in magnetic field and generates induced current. The change in induced current generates force, causing the moving coil 7 to drive the sample to be tested placed on it to vibrate up and down.

[0026] The moving coil 7 is connected to the upper cover plate 2 of the platform 1 through leaf spring guide assembly 82 and tension spring guide assembly 81 evenly distributed along its circumference. When the moving coil 7 moves upward, the tension spring body 811 on the tension spring guide assembly 81 and the leaf spring body 823 on the leaf spring guide assembly 82 apply a downward pulling force to the moving coil 7 through their own elastic energy, so as to prevent the moving coil 7 from vibrating upward and detaching from the platform 1. When the moving coil 7 moves downward, the tension spring body 811 and the leaf spring body 823 can apply an upward pulling force to the moving coil 7, which can assist it to vibrate upward again under the drive of excitation 3.

[0027] Furthermore, the evenly distributed tension spring guide components 81 not only assist the movement of the moving coil 7, but also effectively limit its longitudinal movement path and determine the movement trajectory of the moving coil 7, preventing the moving coil 7 from tilting and ensuring the accuracy of sample detection.

[0028] The vertically positioned guide post 91 is inserted into the inner drive 10 and slidably connected to it via a bearing 92. One end of the guide post 91 extending upward out of the inner drive 10 is detachably fixed to the bottom of the moving coil 7. The guide post 91 is slidably positioned within the inner drive 10. When the moving coil 7 vibrates up and down, the cooperation between the inner drive 10 and the guide post 91 also limits the movement path of the moving coil 7, further ensuring the testing accuracy of the vibration test bench on the sample.

[0029] In some embodiments, the bottom of the moving coil 7 is fastened to the guide post 91 by screws, which facilitates the maintenance and replacement of the guide post 91 by subsequent personnel.

[0030] The tension spring guide assembly 81 includes a tension spring body 811, the two ends of which are connected to the upper cover plate 2 and the outer periphery of the moving coil 7 via a left mounting seat 812 and a right mounting seat 813, respectively. The leaf spring guide assembly 82 includes a leaf spring body 823, the two ends of which are connected to the upper cover plate 2 and the outer periphery of the moving coil 7 via a first fixed mounting seat 821 and a second fixed mounting seat 822, respectively.

[0031] The upper surface of the upper cover plate 2 is recessed downwards and has several mounting slots for mounting the left mounting seat 812 and the fixed mounting seat 821. In order to facilitate the subsequent replacement of the leaf spring body 823 and the tension spring body 811, the left mounting seat 812 and the fixed mounting seat 821 are respectively fixed in the above-mentioned mounting slots by screws, while the right mounting seat 813 and the fixed mounting seat 822 are fixed to the outer periphery of the moving coil 7 by screws.

[0032] In some embodiments, two tension spring guide assemblies 81 and two leaf spring guide assemblies 82 are respectively provided and are evenly distributed on the moving coil 7 in a cross shape. This ensures that the moving coil 7 can always move up and down along the central axis of the moving coil 7 when it is working on the vibration test bench, thus ensuring its longitudinal path during movement.

[0033] The moving coil 7 has several mounting holes 71 on its top for easy installation of the sample to be tested. Several stiffening plates 72 are arranged around the outer periphery of the moving coil 7. The right mounting plate and the fixed mounting base 822 are spaced apart on the stiffening plates 72. Specifically, the mounting holes 71 can be threaded holes, allowing the sample to be directly attached to the moving coil 7 with screws, enabling rapid sample assembly and disassembly for testing and effectively improving the efficiency of vibration testing.

[0034] In some embodiments, the number of upper guide mechanisms 8 is consistent with the number of stiffeners 72. The stiffeners 72 can provide support for the upper guide mechanisms 8, so that the tension spring body 811 and the leaf spring body 823 can connect the platform 1 and the moving coil 7.

[0035] The platform 1 includes an upper cover plate 2 and a lower cover plate 6. The lower cover plate 6 and the upper cover plate 2 are fixedly connected by a plurality of stacked connecting cover plates 4. The inner drive 10 is fixed on the upper surface of the lower cover plate 6. This ensures the stability of the overall structure of the vibration test platform during vibration testing.

[0036] It also includes an airbag 5. When the moving coil 7 moves downward, the top of the airbag 5 can abut against the lower surface of the guide post 91 to buffer the impact caused by vibration. The inner drive 10 has an installation chamber 101 for placing the airbag 5.

[0037] The airbag 5 is typically made of high-strength elastic materials, such as rubber or polyurethane, and is filled with compressed air. When the moving coil 7 vibrates up and down under the drive of the excitation 3, the airbag 5 can absorb and buffer the vibration energy using its elastic properties, reducing the transmission of vibration to other foundation structures or other equipment, such as the lower cover plate 6. At the same time, the elastic deformation of the airbag 5 can also effectively isolate external vibrations (such as ground vibration or vibration of surrounding equipment), ensuring the stability of the vibration test bench operation.

[0038] The platform 1 also includes an external drive 11, which is sleeved on the outside of the induction ring 12. The induction ring 12 is made of aluminum. The aluminum induction ring 12 has high thermal conductivity, electrical conductivity, and cost-effectiveness. The moving coil 7 is made of forged aluminum, unlike the moving coil 7 of a direct-coupled vibration table, and its interior does not carry water or electricity.

[0039] The top of the sensing ring 12 is threaded to the bottom of the moving coil 7, and a reinforcing ring is fixedly sleeved at the connection between the two to strengthen the connection strength and further improve its reliability in subsequent detection processes.

[0040] Specifically, the reinforcing ring is cured at the connection between the sensing ring 12 and the moving coil 7 using high-temperature adhesive.

[0041] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A guide mechanism for a vibration test table, characterized by: It includes an upper guide mechanism and a lower guide mechanism; the upper guide mechanism includes several tension spring guide assemblies and leaf spring guide assemblies, the tension spring guide assembly includes a tension spring body, the leaf spring guide assembly includes a leaf spring body, and the lower guide mechanism includes a guide post.

2. The guiding mechanism of a vibration testing bench according to claim 1, characterized in that: The tension spring body is made of rubber.

3. A vibration testing bench, comprising the guiding mechanism as described in any one of claims 1 to 2, characterized in that: It also includes a platform, an excitation unit, an internal drive, and a moving coil. The moving coil is at least partially located inside the platform and can move vertically. The moving coil is connected to the upper cover plate of the platform through leaf spring guide assemblies and tension spring guide assemblies evenly distributed along its circumference. The vertically arranged guide post is inserted into the internal drive and is slidably connected to it through a bearing. One end of the guide post extending upward out of the internal drive is detachably fixed to the bottom of the moving coil.

4. A vibration testing bench according to claim 3, characterized in that: The tension spring guide assembly includes a tension spring body, the two ends of which are connected to the upper cover plate and the outer periphery of the moving coil via a left mounting seat and a right mounting seat, respectively. The leaf spring guide assembly includes a leaf spring body, the two ends of which are stretched are connected to the upper cover plate and the outer periphery of the moving coil via a fixed mounting seat one and a fixed mounting seat two, respectively.

5. A vibration testing bench according to claim 3, characterized in that: The top of the moving coil has several mounting holes for easy installation of the sample to be tested, and the outer periphery of the moving coil has several stiffening plates. The right mounting plate and the fixed mounting base are spaced apart on the stiffening plates.

6. A vibration testing bench according to claim 3, characterized in that: The platform includes an upper cover plate and a lower cover plate. The lower cover plate and the upper cover plate are fixedly connected by a plurality of stacked connecting cover plates. The inner drive is fixed on the upper surface of the lower cover plate.

7. A vibration testing bench according to claim 3, characterized in that: It also includes an airbag. When the moving coil moves downward, the top of the airbag can abut against the lower surface of the guide post. An installation chamber for placing the airbag is opened inside the inner drive.

8. A vibration testing bench according to claim 3, characterized in that: The platform also includes an external drive, which is sleeved outside the sensing ring, and the sensing ring is made of aluminum material.

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