Moving coil supporting and connecting mechanism and high-frequency vibration testboard comprising same

Abstract

The invention discloses a moving coil supporting and connecting mechanism and a high-frequency vibration testboard comprising the same. The moving coil supporting and connecting mechanism comprises a first supporting and connecting piece and a second supporting and connecting piece, the first supporting and connecting piece comprises a first connecting plate made of a carbon fiber material, the size of the first connecting plate in the circumferential direction of a vibration table top is d11, the size of the first connecting plate in the axial direction of the vibration table top is d12, and d11 is larger than d12; the second supporting connecting piece and the first supporting connecting piece are arranged on the outer side of the moving coil in a staggered mode, the second supporting connecting piece comprises a second connecting plate made of rubber, the size of the second connecting plate in the circumferential direction of the vibration table top is d21, the size of the second connecting plate in the axial direction of the vibration table top is d22, d21 is smaller than d22, and d11 is larger than d21. The vibration table has extremely high vibration stability during high-frequency vibration, and the harmonic distortion degree of the vibration table is also greatly reduced through tests.

Description

Technical Field

[0001] This invention relates to the field of vibration testing platform technology, and more specifically to a moving coil support connection mechanism and a high-frequency vibration testing platform including the same. Background Technology

[0002] The moving coil support connection mechanism is used to keep the vibration table surface centered in the axial and radial directions during vibration table operation, which has a significant impact on maintaining the high-frequency and stable vibration performance of the vibration table. However, during vibration table operation, the vibration transmitted from the vibration table surface to the table body can be transmitted back to the vibration table surface, which will have a significant negative impact on the performance of the vibration table.

[0003] Furthermore, most existing vibration tables use leaf springs or U-shaped springs, which have high elasticity and buffering force, to support the moving coil. However, these leaf springs or U-shaped springs constantly generate repeated micro-vibrations during the deformation and recovery process, thus creating a negative vibration force on the vibration table. Moreover, the existing vibration table's moving coil support mechanism is prone to breakage or bending deformation. Therefore, existing vibration test benches struggle to maintain stable vibration at high frequencies (e.g., above 8000Hz, or even up to 10000Hz). Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a moving coil support connection mechanism, which is connected to both the moving coil and the vibration table body. The moving coil's outer surface of the table body is provided with a vibration table surface. The moving coil support connection mechanism is used to maintain the vibration table surface in a centered position in both the axial and radial directions. It includes: first support connectors, located outside the moving coil and arranged along the radial direction of the vibration table surface; the first support connectors are arranged in pairs opposite to each other; each first support connector includes a first connecting plate made of carbon fiber; the first connecting plate extends along the vibration table surface... The circumferential dimension of the moving table is d11, and the axial dimension of the first connecting plate along the moving table is d12, where d11 is greater than d12. A second support connector is provided, staggered with the first support connector, on the outer side of the moving ring. The second support connector includes a rubber connecting plate. The circumferential dimension of the second connecting plate along the moving table is d21, and the axial dimension of the second connecting plate along the moving table is d22, where d21 is less than d22, and d11 is greater than d21.

[0005] The present invention has the following beneficial effects:

[0006] ① In this application, the first connecting plate plays a rigid connection role, and it resonates with the vibration of the moving coil to ensure that the vibration table has a high-frequency vibration effect. By using carbon fiber material for the first connecting plate, the weight of the moving coil support connection structure is reduced, energy loss is reduced, and the moving coil support connection structure has high strength and fatigue resistance, extending its service life. The second connecting plate is set such that its dimension along the axial direction of the vibration table is larger than its dimension in the circumferential direction, and it is not easy to deform during vibration. This allows the second support connection to play a high-damping characteristic vibration reduction effect, which can effectively reduce the negative vibration force of the vibration table along the axial direction. Therefore, it cooperates with the first connecting plate to form a "rigid" and "flexible" effect, which provides stable support and connection for the vibration table surface. It has extremely high vibration stability during high-frequency vibration of the vibration table and can withstand a large specimen weight. Moreover, after testing, its harmonic distortion is also greatly reduced.

[0007] ②Because the second connecting plate has a larger dimension along the axial direction of the vibration table, the corresponding second support connector is also set to have a larger dimension along the axial direction of the vibration table. Therefore, during the up and down movement of the moving coil, the opposing second support connectors can apply a central force to the moving coil, making it less likely for the vibration table surface to tilt and keeping it in a central state.

[0008] ③ Setting the dimension of the second connecting plate in the axial direction along the vibration table to be larger than the dimension in the circumferential direction can make the second connecting plate more resistant to vibration and have better damping characteristics. This avoids the negative impact on the vibration table caused by the moving coil support connection structure itself. Together with the first support connector, it plays the role of supporting and connecting the moving coil, thus giving it a longer service life.

[0009] Furthermore, the first connecting plate comprises two layers of carbon fiber plates stacked on top of each other. Using two layers of stacked carbon fiber plates greatly improves the vibration performance stability of the shaking table and significantly reduces its harmonic distortion. In this application, the two layers of carbon fiber plates are independent of each other, meaning they are not connected as a single unit by adhesive layers or similar materials. Therefore, while ensuring sufficient rigidity for vibration force transmission during vibration, they also maintain their independence, and the thickness of a single carbon fiber plate is reduced, thus lowering the probability of the first connecting plate breaking.

[0010] Furthermore, the first support connector also includes a first mounting base connected to the platform body. One end of the first connecting plate is connected to the first mounting base. The first mounting base includes a bottom mounting block and side mounting blocks located on both sides of the bottom mounting block, with a rubber layer disposed between the bottom mounting block and the side mounting blocks. By providing the rubber layer, the vibration of the platform body can be effectively reduced to the vibration table, thereby greatly improving the vibration stability of the vibration table.

[0011] Furthermore, the end of the bottom mounting block furthest from the moving coil is provided with a connecting surface for connecting to the first connecting plate. The side of the connecting surface connected to the first connecting plate protrudes from the side mounting block. On the side of the bottom mounting block near the first connecting plate, a slope gradually inclines towards the bottom of the first mounting base towards the moving coil. Therefore, after the first connecting plate is placed on the connecting surface, the structure of the first mounting base can provide sufficient space for the vibration of the first connecting plate. A lead wire connector is also provided on the side region of the bottom mounting block protruding from the side mounting block, thus increasing the expansion functionality of the bottom mounting block and enabling it to meet the functional requirement of electrical conduction of the moving coil in a coupled-type electrically conductive vibration table.

[0012] Furthermore, the surface of the side mounting block furthest from the carbon fiber plate protrudes from the bottom mounting block, and a gap is provided between the bottom mounting block and the platform, meaning the bottom mounting block does not directly contact the platform. Therefore, vibrations from the platform are effectively isolated from transmission to the vibration table surface via the bottom mounting block, thereby ensuring the operational stability of the vibration table.

[0013] Furthermore, the second support connector includes a first connector and a second connector respectively disposed at opposite ends of the second connecting plate. The first connector is detachably connected to the platform, and the second connector is detachably connected to the moving coil. The platform is also provided with a receiving groove for accommodating the second connecting plate. Correspondingly, the first connector is also synchronously disposed in the receiving groove. That is, the second support connector is disposed in the platform in a way that it is embedded in the platform. Therefore, it can play a guiding role when the moving coil moves, so as to stabilize the vibration process of the vibration table.

[0014] Furthermore, the thickness of the second connector is less than that of the first connector, and a mounting shim is also provided between the second connector and the moving coil. This application reduces abnormal fluctuation peaks during vibration by providing a mounting shim between the second connector and the moving coil, rather than directly making the second connector a thicker structure. This is because the second support connector increases damping during vibration table operation. Consequently, the second connecting plate continuously applies up-and-down torsional oscillation forces to the second connector, which in turn exerts a force in the same direction on the moving coil. By providing a mounting shim, this force can be weakened or canceled, thereby reducing interference with the original vibration force of the moving coil and enabling the vibration table to have a continuous and stable vibration output.

[0015] The second connecting plate is obtained by forming vulcanized rubber between the first connecting head and the second connecting head. The surfaces of the first connecting head and the second connecting head that are close to each other are provided with connecting surfaces. The connecting surfaces can be sandblasted or have hook-shaped structures extending toward the second connecting plate.

[0016] The present invention also provides a high-frequency vibration test bench, which includes the aforementioned moving coil support connection mechanism, and further includes a limiting mechanism for sensing the extreme position of the vibration table surface.

[0017] Furthermore, the limiting mechanism includes a limiting sensor plate connected to the moving coil, the limiting sensor plate protruding from the upper surface of the stage body. The limiting mechanism also includes a first switch and a second switch located between the lower surface of the vibration table and the upper surface of the stage body. The first switch is located on the side away from the vibration table. When the vibration table moves to a first extreme position, the lower surface of the vibration table triggers the first switch, applying a force in the opposite direction to the moving coil. When the vibration table moves to a second extreme position, the limiting sensor plate triggers the second switch. This controls the vibration amplitude of the vibration table within an ideal range, thus giving the vibration table a stable vibration frequency.

[0018] Furthermore, the limiting sensor plate and at least one of the first or second support connectors are jointly disposed on the frame of the moving coil, and a limiting groove for the movement of the limiting sensor plate is provided on the platform. Therefore, the limiting sensor plate can be installed simultaneously when connecting the first or second support connector to the moving coil. This application only requires a simple setting of a limiting sensor plate and a first and a second switch, and cleverly utilizes the structure of the platform to achieve rapid correction of the vibration amplitude when the vibration table moves to its limit position, so that the vibration frequency of the vibration table is always kept within the ideal range, further improving the vibration stability of the vibration table, thereby achieving its high-frequency and stable vibration effect. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the moving coil support connection mechanism of Embodiment 1 of the present invention when it is installed on a vibration table. Figure 2 for Figure 1 A magnified view of a portion of point C in the middle; Figure 3 for Figure 1 A magnified view of a portion of point D in the middle; Figure 4 This is a schematic diagram showing the connection relationship between the moving coil and the second support connector. Figure 5 This is a three-dimensional structural diagram of the first mounting base; Figure 6 A schematic diagram of the receiving groove on the platform; Figure 7 This is a three-dimensional structural diagram of the second support connector; Figure 8(a) is a sweep spectrum diagram of vibration performance analysis when using a double-layer carbon fiber plate as the first connecting plate and the target peak value is 5g. Figure 8(b) is a sweep spectrum diagram of vibration performance analysis when using a double-layer carbon fiber plate as the first connecting plate and the target peak value is 100g. Figure 9 The total harmonic distortion analysis curve is shown when using a double-layer carbon fiber plate as the first connecting plate for vibration performance analysis. Figure 10 The sweep spectrum diagram is shown when using a single-layer carbon fiber plate as the first connecting plate for vibration performance analysis. Figure 11 The total harmonic distortion analysis curve is shown when using a single-layer carbon fiber plate as the first connecting plate for vibration performance analysis. Figure 12 The spectrum diagram is shown when the rubber layer is not installed on the first mounting base. Figure 13 Total harmonic distortion analysis curves when the first mounting base does not have a rubber layer; Figure 14 This is a cross-sectional structural diagram of Example 2.

[0020] In the picture: 1. Moving coil; 11. Frame; 2. Stage; 21. Receiving groove; 22. Limiting groove; 3. Vibration table surface; 4. First support connector; 41. First connecting plate; 42. First mounting base; 421. Bottom mounting block; 4211. Connecting surface; 4212. Lead wire connector position; 422. Side mounting block; 423. Rubber layer; 43. Second mounting bracket; 5. Second support connector; 51. First connector; 511. First mounting hole; 52. Second connector; 521. Second mounting hole; 53. Second connecting plate; 6. Induction ring; 7. Excitation; 81. Limit sensor; 82. First switch; 83. Second switch. 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 providing a clearer and more explicit definition of the scope of protection of the present invention.

[0022] Example 1: This embodiment is a moving coil support connection mechanism used to connect the moving coil 1 to the platform 2 of the vibration table. The surface of the moving coil 1 located on the outer side of the platform 2 is provided with a vibration table surface 3. The vibration table surface 3 generates a vibration effect as the moving coil 1 moves back and forth in the axial direction.

[0023] See appendix Figure 1-7 The moving coil support connection mechanism of the present invention includes a first support connector 4 and a second support connector 5.

[0024] The first support connector 4 is connected to the outer side of the moving coil 1 frame 11, and its length direction is arranged along the radial direction of the vibration table surface 3. The first support connector 4 includes at least one set, and the two first support connectors 4 in each set are arranged opposite each other. That is, a set of paired first support connectors 4 are distributed in a 180-degree phase direction on the outer side of the moving coil 1. When there are multiple sets of first support connectors 4, the phase angle between any two adjacent first support connectors 4 is equal. The first support connector 4 includes a first connecting plate 41 made of carbon fiber. The dimension (i.e., the thickness along the A direction) of the first connecting plate 41 along the circumferential direction A of the vibration table surface 3 is d11, and the dimension (i.e., the thickness along the B direction) of the first connecting plate 41 along the axial direction B of the vibration table surface 3 is d12, where d11 is greater than d12. The second support connector 5 is staggered with the first support connector 4 on the outer side of the moving coil 1. The second support connector 5 includes a second connecting plate 53 made of rubber. The second connecting plate 53 has a dimension d21 in the circumferential direction A along the vibration table surface 3 and a dimension d22 in the axial direction B along the vibration table surface 3. d21 is less than d22, and d11 is greater than d21. Figure 7 ).

[0025] In some embodiments, the first support connector 4 can be at least one set, and correspondingly, the second support connector 5 is staggered with the first support connector 4. Therefore, the first support connector 4 and the second support connector 5 are staggered and evenly distributed on the outside of the moving coil 1 and connected to the moving coil 1.

[0026] In some embodiments, the second connecting plate 53 has a Shore hardness of 45°.

[0027] In this application, the first connecting plate 41 serves as a rigid connection, resonating with the vibration of the moving coil 1 to ensure the vibration table has a high-frequency vibration effect. The second connecting plate 53 is configured such that its axial dimension is larger than its circumferential dimension, and it is not easily deformed during vibration of the vibration table. This allows the second support connector 5 to function as a flexible connection with high damping characteristics. Setting the axial dimension of the second connecting plate 53 along the vibration table surface 3 to be larger than its circumferential dimension along the vibration table surface 3 can effectively reduce the negative vibration force of the vibration table along the axial direction. Therefore, it cooperates with the first connecting plate 41 to have extremely high vibration stability during high-frequency vibration of the vibration table. Moreover, after testing, its harmonic distortion is also greatly reduced.

[0028] Since the second connecting plate 53 has a larger dimension along the axial direction of the vibration table, the corresponding second support connector 5 is also set to have a larger dimension along the axial direction of the vibration table. Therefore, during the up and down movement of the moving coil 1, the relatively set second connecting plate 53 can apply a pressing force to the moving coil 1, making it less prone to tilting and keeping the vibration table surface 3 in a centered state.

[0029] By adopting this configuration, the second connecting plate 53 can withstand greater vibration during vibration table operation. Together with the first support connector 4, it plays a supporting and connecting role for the moving coil 1, thus giving it a longer service life.

[0030] In some embodiments, the first connecting plate 41 comprises two layers of carbon fiber plates stacked on top of each other. Using two layers of stacked carbon fiber plates greatly improves the vibration performance stability of the vibration table and significantly reduces its harmonic distortion. In this application, the two layers of carbon fiber plates are independent of each other; that is, they are not connected as a whole by adhesive layers or the like, but are only fixed to each other at both ends of the first connecting plate 41. Therefore, while ensuring sufficient rigidity for vibration force transmission during vibration, the thickness of each individual carbon fiber plate can be reduced to give it a certain degree of "flexibility," making it less prone to breakage.

[0031] The vibration performance of the first connecting plate 41 using two layers of carbon fiber plates was analyzed using a testing instrument and a Tengzhen V880 vibration controller. The analysis parameters are as follows: target peak value: 5g; control peak value: 4.9822g; drive peak value: 0.5714V; magnitude: 100%; current frequency: 10000Hz; sweep mode: logarithmic; sweep frequency: 1Oct / Min; remaining sweep times: 0; number of test sweeps: 1; test time: 00:01:00; total running time: 00:01:12.

[0032] The results are shown in Figures 8(a) and 9. Figure 8(a) is a sweep spectrum diagram when the first connecting plate 41 uses two layers of carbon fiber plates. There are six lines in the middle of the test spectrum. The cyan line in the middle is the test target spectrum, the black line is the dynamic test control curve, the top and bottom symmetrical red lines are the high interruption line and the low interruption line, respectively, and the yellow dashed line in the middle is the high alarm line and the low alarm line. As can be seen from Figure 8(a), when using double-layer carbon fiber plates as the first connecting plate 41 for vibration performance analysis, an abnormal peak value only appeared once at the end of the test. The abnormal vibrations at other times were far below the alarm line, and the overall stability was high.

[0033] Figure 9 The total harmonic distortion (THD) analysis curve is used to analyze the deviation between the actual vibration value and the target vibration value. The calculation formula is: Total harmonic distortion = |Measured value - Set value| / Set value.

[0034] Meanwhile, vibration performance analysis was conducted on the sample using two layers of carbon fiber plates with a target peak value of 100g. The analysis parameters were as follows: target peak value: 100g; control peak value: 99.848g; driving peak value: 3.7542V; magnitude: 100%; current frequency: 10000Hz; sweep mode: logarithmic; sweep frequency: 0.5Oct / Min; remaining sweep times: 0; number of test sweeps: 1; test time: 00:02:00; total running time: 00:02:12. The sweep results are shown in Figure 8(b).

[0035] In contrast, the results when only a single layer of carbon fiber plate is used in the first connecting plate 41 are as follows: Figure 10 and 11 As shown, the analysis parameters are: target peak value: 100g; control peak value: 110.67g; drive peak value: 2.1223V; magnitude: 100%; current frequency: 10000Hz; sweep mode: logarithmic; sweep frequency: 0.5Oct / Min; remaining sweep times: 0; number of experimental sweeps: 1; experimental time: 00:02:00; total running time: 00:02:11.

[0036] from Figure 10 It can be seen that when using a single-layer carbon fiber plate as the first connecting plate 41 for vibration performance analysis, multiple abnormal peak values ​​occurred during the test, and the number of abnormal vibrations was relatively high.

[0037] Depend on Figure 11 It can be seen that when the first connecting plate 41 uses a single-layer carbon fiber plate, there are 4-5 points where the total harmonic distortion exceeds 40%, with the highest being around 65% (frequency around 7200Hz). Combined with... Figure 9 The total harmonic distortion of the first connecting plate 41 using a double-layer carbon fiber plate is much lower than that of the case using a single-layer carbon fiber plate.

[0038] In some implementations, see Appendix Figure 5 The first support connector 4 also includes a first mounting base 42 connected to the platform 2. One end of the first connecting plate 41 is connected to the first mounting base 42. The first mounting base 42 includes a bottom mounting block 421 and side mounting blocks 422 located on both sides of the bottom mounting block 421. A rubber layer 423 is provided between the bottom mounting block 421 and the side mounting blocks 422. By providing the rubber layer 423, the vibration of the platform 2 can be effectively reduced to the vibration table, thereby greatly improving the vibration stability of the vibration table. In some embodiments, the rubber layer 423 can be made of natural rubber material with a Shore hardness of 60-65°.

[0039] Meanwhile, this application conducts a comparative analysis of vibration performance in the case where the rubber layer 423 is not provided, but the first connecting plate 41 is made of double-layer carbon fiber plate. The results are as follows: Figure 12-13 As shown. The analysis parameters are: target peak value: 50g; control peak value: 50.189g; driving peak value: 0.1212 V; magnitude: 100%; current frequency: 10000Hz; sweep mode: logarithmic; sweep frequency: 0.5Oct / Min; remaining sweep times: 0; experimental sweep times: 1; experimental time: 00:21:55; total running time: 00:22:11. Figures 8(a), 8(b) and... Figure 9 The results shown are obtained using the first mounting base 42 with the rubber layer 423. It can be seen that without the rubber layer 423, the total harmonic distortion of the vibration table is very high, with 4-5 points exceeding 30% distortion, reaching a maximum of approximately 119%. Furthermore, the number of abnormal vibrations in the frequency sweep results is significantly higher than when using the double-layer carbon fiber plate and the rubber layer 423.

[0040] In some embodiments, the surface of the side mounting block 422 furthest from the carbon fiber plate protrudes from the bottom mounting block 421, and the bottom mounting block 421 does not directly contact the stage 2, i.e., there is a gap between the bottom mounting block 421 and the stage 2. Therefore, the vibration of the stage 2 can be effectively isolated from transmission to the vibration table surface 3 via the bottom mounting block 421, thereby ensuring the operational stability of the vibration table. Thus, this structural arrangement of the first mounting base 42 effectively reduces the negative vibration impact on the vibration table surface 3 caused by the vibration of the stage 2, which would otherwise have a significant negative impact on the performance of the vibration table.

[0041] In some embodiments, the end of the bottom mounting block 421 furthest from the moving coil 1 is provided with a connecting surface 4211 that connects to the first connecting plate 41. The side of the connecting surface 4211 that connects to the carbon fiber plate protrudes into the side mounting block 422. On the side of the bottom mounting block 421 near the first connecting plate 41, a slope gradually inclines towards the bottom of the first mounting base 42 in the direction of the moving coil 1. Therefore, after the first connecting plate 41 is placed on the connecting surface 4211, the structure of the first mounting base 42 provides sufficient space for the vibration of the first connecting plate 41. A lead wire connector 4212 is also provided on the side region of the bottom mounting block 421 protruding from the side mounting block 422, thus increasing the functionality of the bottom mounting block 421 and enabling it to meet the functional requirement of electrical conduction for the moving coil 1 in a coupled-type energized vibration table.

[0042] In some embodiments, the second support connector 5 includes a first connector 51 and a second connector 52 respectively disposed at opposite ends of the second connecting plate 53. The first connector 51 is detachably connected to the platform 2, and the second connector 52 is detachably connected to the moving coil 1. The length directions of the first connector 51 and the second connector 52 are both along the axial direction of the vibration table. A receiving groove 21 for accommodating the second connecting plate 53 is also provided on the platform 2. Figure 6 Correspondingly, the first connector 51 is also synchronously set in the receiving groove 21, that is, the second support connector 5 is set in the form of being embedded in the platform 2. Therefore, it can play a guiding role when the moving coil 1 moves, so as to stabilize the vibration process of the vibration table. The first connector 51 is provided with a first mounting hole 511 that runs through the axial direction of the vibration table, and the second connector 52 is provided with two second mounting holes 521 that run radially along the vibration table. The second connector 52 is connected to the frame 11 of the moving coil 1 by bolts passing through the second mounting holes 521.

[0043] In some embodiments, the end of the first support connector 4 connected to the moving coil 1 is connected via a second mounting base 43. The second mounting base 43 is located at the end of the moving coil 1 frame 11 near the vibration table 3, while the second support connector 5 is located on the outer side of the moving coil 1 frame 11. That is, the first support connector 4 is located closer to the vibration table 3, thereby providing better support and connection for the vibration table 3.

[0044] In some embodiments, the thickness of the second connector 52 (i.e., the thickness along the radial direction of the vibration table surface 3) is less than the thickness of the first connector 51, and a mounting shim is also provided between the second connector 52 and the moving coil 1. This application reduces abnormal fluctuation peaks during vibration by providing a mounting shim between the second connector 52 and the moving coil 1, rather than directly making the second connector 52 a thicker structure. This is because the second support connector 5 increases damping during vibration table operation. Consequently, the second connecting plate 53 continuously applies a torsional and oscillating force to the second connector 52, which in turn applies a force in the same direction to the moving coil 1. By providing a mounting shim, this force can be weakened or offset, thereby reducing interference with the vibration force on the moving coil 1 caused by improper setting of the moving coil support connection mechanism itself, thus enabling the vibration table to have a continuous and stable vibration output.

[0045] The second connecting plate 53 is formed by forming vulcanized rubber between the first connecting head 51 and the second connecting head 52. The surfaces of the first connecting head 51 and the second connecting head 52 that are close to each other are provided with connecting surfaces. These connecting surfaces can be sandblasted or have hook-like structures extending towards the second connecting plate 53, so that the second connecting plate 53 can form a firm connection with the first connecting head 51 and the second connecting head 52. Furthermore, this prevents the first connecting head 51 and the second connecting head 52 from easily disengaging from the second connecting plate 53 as the vibration table 3 moves, maintaining the integrity of the second supporting connecting member 5 and thus ensuring that the second supporting connecting member 5 does not negatively impact the vibration process.

[0046] Example 2: This embodiment is a high-frequency vibration test bench. See [link / reference] Figure 14 The system includes the moving coil support connection mechanism of Embodiment 1, and also includes a limiting mechanism for sensing the extreme positions of the vibration table 3. The high-frequency vibration test bench of this embodiment also includes a sensing ring 6 and an excitation magnet 7 connected to the moving coil 1.

[0047] In some embodiments, the excitation coil 7 is a coil disk assembly surrounding the induction ring 6, and a magnetic field is formed by passing a current through the excitation coil 7. Accordingly, an induced current can be generated in the induction ring 6, and under the action of the excitation magnetic field 7, it flows along the axial direction of the vibration table (e.g., ...). Figure 1 Move up and down in the direction indicated by the middle arrow B.

[0048] In some embodiments, the limiting mechanism includes a limiting sensor 81 disposed on the moving coil 1, the limiting sensor 81 protruding from the upper surface of the stage 2. The limiting mechanism also includes a first switch 82 and a second switch 83 located between the lower surface of the vibration table 3 and the upper surface of the stage 2. The first switch 82 is located on the side away from the vibration table 3, that is, the second switch 83 is located closer to the vibration table 3. When the vibration table 3 moves to the first limit position (with... Figure 1 Taking the vibration direction B of the vibration table as an example (vertical direction), when the vibration table surface 3 moves to the lower limit position, the lower surface of the vibration table surface 3 will trigger the first switch 82, applying an upward force to the moving coil (this can be achieved by setting an adjustment mechanism such as an air spring, which can be activated by the first switch 82 or the second switch 83 to open or close the adjustment mechanism when a force needs to be applied to the moving coil, thus adjusting the vibration amplitude of the vibration table surface); when the vibration table surface 3 moves to the second limit position (taking... Figure 1 Taking the vibration direction of the vibration table in the middle as an example, the second limit position is when the vibration table surface 3 moves to the upper limit position. The limit sensor 81 triggers the second switch 83; the first switch 82 and the second switch 83 can be micro switches.

[0049] The first switch 82 is located directly below the vibration table 3, while the second switch 83 is located below and to the outside of the vibration table 3. Therefore, the second switch 83 will not interfere with the normal movement of the vibration table.

[0050] In some embodiments, the limiting sensor 81 and at least one of the first support connector 4 or the second support connector 5 are jointly disposed on the frame 11 of the moving coil 1, and a limiting groove 22 for moving the limiting sensor 81 is provided on the platform 2. Figure 1 and Figure 3 Therefore, when connecting the first support connector 4 or the second support connector 5 to the moving coil 1, the limit sensor 81 can be installed simultaneously. This application only requires a simple setting of a limit sensor 81, a first switch 82, and a second switch 83, and cleverly utilizes the structure of the platform 2 to achieve rapid correction of the vibration amplitude when the vibration table surface 3 moves to its limit position, further improving the stability of the vibration frequency of the vibration table. Therefore, the high-frequency vibration test platform of the present invention, through the optimization of the moving coil support connection structure, reduces the negative impact of unreasonable structural settings of the vibration table on vibration stability. At the same time, through the limit mechanism, the abnormal vibration of the vibration table can be intervened in a timely manner using an external adjustment mechanism, thereby enabling the vibration test platform to achieve a high-frequency and stable vibration effect.

[0051] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A moving coil support connection mechanism, connected to both a moving coil and a vibration table body, wherein a vibration table surface is provided on the outer surface of the moving coil located on the table body, characterized in that, include: The first support connector is located outside the moving coil and is arranged along the radial direction of the vibration table surface. The first support connectors are arranged in pairs opposite to each other. The first support connector includes a first connecting plate made of carbon fiber. The first connecting plate has a dimension d11 in the circumferential direction along the vibration table surface and a dimension d12 in the axial direction along the vibration table surface. d11 is greater than d12. The second support connector is disposed alternately with the first support connector on the outside of the moving coil. The second support connector includes a second connecting plate made of rubber. The second connecting plate has a dimension d21 in the circumferential direction along the vibration table surface and a dimension d22 in the axial direction along the vibration table surface. d21 is less than d22, and d11 is greater than d21.

2. The moving coil support connection mechanism according to claim 1, characterized in that, The first connecting plate comprises two layers of carbon fiber plates stacked on top of each other.

3. The moving coil support connection mechanism according to claim 2, characterized in that, The first support connector further includes a first mounting base connected to the platform body. One end of the first connecting plate is connected to the first mounting base. The first mounting base includes a bottom mounting block and side mounting blocks located on both sides of the bottom mounting block. A rubber layer is provided between the bottom mounting block and the side mounting blocks.

4. The moving coil support connection mechanism according to claim 3, characterized in that, The bottom mounting block has a connecting surface at the end away from the moving ring that connects to the first connecting plate. The side of the connecting surface that connects to the first connecting plate protrudes from the side mounting block. The bottom mounting block also has a slope that gradually slopes towards the bottom side of the first mounting seat in the direction of approaching the moving ring.

5. The moving coil support connection mechanism according to claim 3, characterized in that, The surface of the side mounting block away from the carbon fiber plate protrudes from the bottom mounting block, and a gap is provided between the bottom mounting block and the platform.

6. The moving coil support connection mechanism according to any one of claims 1-5, characterized in that, The second support connector includes a first connector and a second connector respectively disposed at opposite ends of the second connecting plate. The first connector is detachably connected to the platform body, and the second connector is detachably connected to the moving coil. The first connector is provided with a first mounting hole that extends through the axial direction of the vibration table, and the second connector is provided with two second mounting holes that extend radially along the vibration table. The second connector is connected to the moving coil skeleton by bolts passing through the second mounting holes.

7. The moving coil support connection mechanism according to claim 6, characterized in that, The thickness of the second connector is less than that of the first connector, and a mounting gasket is provided between the second connector and the moving coil.

8. A high-frequency vibration testing bench, characterized in that, The moving coil support connection mechanism as described in any one of claims 1-7 further includes a limiting mechanism for sensing the extreme position of the vibration table.

9. The high-frequency vibration test bench according to claim 8, characterized in that, The limiting mechanism includes a limiting sensor plate connected to the moving coil, the limiting sensor plate protruding from the upper surface of the platform. The limiting mechanism also includes a first switch and a second switch located between the lower surface of the vibration table and the upper surface of the platform. The first switch is located on the side away from the vibration table. When the vibration table moves to the first limit position, the lower surface of the vibration table triggers the first switch, thereby applying a force in the opposite direction to the moving coil. When the vibration table moves to the second limit position, the limit sensor plate triggers the second switch.

10. The high-frequency vibration test bench according to claim 9, characterized in that, The limiting sensor plate and at least one of the first or second support connector are jointly disposed on the frame of the moving coil, and a limiting groove for the limiting sensor plate to move is provided on the platform.

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