Workpiece fixing table for vibration test and vibration test system comprising same

Abstract

The invention discloses a workpiece fixing table for vibration testing and a vibration testing system comprising the workpiece fixing table. The workpiece fixing table comprises a bearing table, a connecting base, a hydraulic bearing and a bearing shaft, the bearing table can move relative to the connecting base, the hydraulic bearing is located below the bearing table, the bearing shaft penetrates through the hydraulic bearing and is connected with the bearing table, the bearing table can move in the first direction in the axial direction of the bearing shaft, and the hydraulic bearing is in sliding connection with the connecting base. The bearing table can move in the second direction, the second direction and the first direction are not collinear, the ratio of the larger one of the length value and the width value of the workpiece fixing tables to the length value of the workpiece to be tested is smaller than 1 / 2, and the carriers are arranged on the at least two workpiece fixing tables at the same time during vibration testing. At least two workpiece fixing tables are adopted, so that the thrust requirement on the vibration table is effectively reduced, and the use cost of the vibration table is correspondingly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration testing, and in particular to a workpiece fixing platform for vibration testing and a vibration testing system comprising the same. Background Art

[0002] When performing vibration testing, if the workpiece is too large to be placed directly on the vibration table's work surface, a slide must be installed on the side of the vibration table and connected to the slide via a clamp. Before testing, the workpiece is first secured to the slide using a fixture, and then the clamp is connected to the slide.

[0003] The existing slide comprises a base and a slide table with a large length and / or width arranged on the base (see attached Figure 10 Currently, vibration testing of workpieces that are long and / or wide often requires a slide with a large surface area to adequately support the workpiece. For example, if the workpiece is long and narrow, the slide width must be increased to match its length, resulting in a larger overall slide volume and weight. Large, regular workpieces also require a larger overall slide area, increasing the weight of the slide surface. Consequently, the required thrust from the vibration table increases, which in turn increases the power requirements, resulting in high energy consumption and high costs. Summary of the Invention

[0004] In order to overcome the above shortcomings, the present invention aims to provide a workpiece fixing platform for vibration testing, comprising a supporting platform and a connecting base arranged opposite to each other in an upper and lower direction, wherein the supporting platform can move relative to the connecting base, and further comprising: A hydraulic bearing, the hydraulic bearing being located below the bearing platform, A bearing shaft passes through the hydraulic bearing and is connected to the bearing platform. A guide opening is provided on the bearing platform for the bearing shaft to movably penetrate therethrough. The bearing platform can move in a first direction along the axial direction of the bearing shaft. The hydraulic bearing is slidably connected to the connecting base. When the workpiece is subjected to a force in a second direction, the hydraulic bearing moves along the second direction, and the supporting platform can move in the second direction. The second direction is not collinear with the first direction. The ratio of the larger of the length and width of the workpiece fixing platform to the length of the workpiece to be tested is less than 1 / 2. When performing a vibration test, the carrier is simultaneously placed on at least two of the workpiece fixing platforms.

[0005] This application has the following beneficial effects: ① The present application replaces the large slide structure in the prior art and only adopts at least two workpiece fixing tables for vibration testing, which significantly reduces the table area and volume of the workpiece fixing table, thereby effectively reducing the thrust requirements for the vibration table and correspondingly reducing the use cost and power consumption requirements of the vibration table; in addition, since the workpiece fixing table is arranged on the base in a detachable form, the layout of the workpiece fixing table can be adjusted arbitrarily according to the test requirements, thereby meeting various actual test needs.

[0006] ② This application utilizes a hydraulic bearing with a high pressure-bearing capacity and arranges a bearing shaft therein, thereby ensuring that the bearing platform can move smoothly along the axial direction of the bearing shaft without deformation of the bearing, and ensuring that the bearing platform has a high load-bearing capacity and a long service life, thereby enabling the bearing platform to have sufficient mechanical strength while having only a small area and volume.

[0007] ③ Since the supporting platform of this application is relatively small, it is often necessary to set up multiple workpiece fixing platforms to fix the same workpiece. Therefore, the requirements for mutual coordination and cooperation between the various workpiece fixing platforms are higher. This application sets a hydraulic bearing close to one side of the supporting platform and cooperates with the bearing shaft, so that the supporting platform can form better follow-up with the force when the workpiece vibrates, thereby meeting the vibration test requirements for narrow and long workpieces. By sliding the hydraulic bearing and the connecting base, while ensuring the ability of the supporting platform to move freely, the overall structure of the workpiece fixing platform is simpler and lighter, further reducing the thrust requirements for the vibration table.

[0008] Furthermore, the workpiece fixture includes a mounting plate for securing the hydraulic bearing. Cooperating slide rails and sliders are provided on adjacent surfaces of the mounting plate and the connecting base, respectively, so that the mounting plate and the connecting base are in sliding contact with each other. The provision of a slide rail structure between the connecting base and the mounting plate, rather than a hydraulic bearing structure, reduces the negative impact of vibration on the connecting base, as it is located away from the vibration source. Furthermore, since the connecting base is not the primary direction of movement during vibration testing, the need for a hydraulic bearing structure is eliminated, thereby reducing the overall structural complexity and weight of the workpiece fixture. Furthermore, the workpiece fixture includes at least one set of support rods connected to the support platform and the mounting plate, with adjustable ends mounted on each end of the support rods. The adjustable ends comprise, from the outside inward, a first rigid layer, an elastic deformation layer, and a second rigid layer. This allows for a certain amount of deformation between the support rods, the support platform, and the connection base. Therefore, during vibration testing, the vibration force imparted by the vibration platform to the workpiece fixture is offset to a certain extent, thereby achieving a shock-absorbing effect and, to a certain extent, eliminating noise during vibration testing.

[0009] Furthermore, the support rod is connected to the bearing platform through the upper support seat, and a limiting groove 1 for clamping and accommodating the adjustment end is provided in the upper support seat, and a hollow groove 1 is further provided in the area corresponding to the adjustment end in the upper support seat, and the hollow groove 1 extends to the outer surface of the upper support seat, and the inner diameter of the hollow groove 1 is smaller than the inner diameter of the limiting groove 1. An annular abutting surface 1 for clamping the adjustment end is formed at the connection between the hollow groove 1 and the limiting groove 1. The support rod is connected to the mounting plate via a lower support base. A second retaining groove is provided within the lower support base for engaging and accommodating the adjustable end. A second hollow groove is also provided within the lower support base, with the inner diameter of the second hollow groove being smaller than that of the second retaining groove. Thus, the provision of the retaining groove and the hollow groove facilitates both a stable connection of the adjustable end and eases installation. Hollow groove one allows for adjustment and observation of the proper installation of the adjustable end, facilitating installation of the adjustable end within the upper support base.

[0010] Furthermore, the support rod is provided with a limiting edge below the upper support seat, with an adjustable gap reserved between the limiting edge and the upper support seat. This allows the support rod to have a certain amount of displacement in its axial direction, thereby allowing the support platform to have room for slight swing or adjustment during vibration testing of the workpiece.

[0011] Furthermore, the upper support seat includes a connecting portion and a first supporting portion, wherein the connecting portion is fixed to the load-bearing platform, the first supporting portion is connected to the upper end of the support rod, the connecting portion is located on the side of the load-bearing platform, and the first supporting portion is located on the bottom surface of the load-bearing platform. The adjustment end portion connected to the upper end portion of the support rod is located within the first supporting portion, and there is a height difference between the upper groove bottom of the first limiting groove and the upper surface of the first supporting portion. Thus, the support rod can form a stable support for the load-bearing platform within the first supporting portion through the adjustment end portion, while maintaining sufficient mechanical strength.

[0012] Furthermore, the support rod is located on the side of the hydraulic bearing and is located in the plane of the hydraulic bearing's swing direction. The support rod is arranged on this side of the hydraulic bearing to provide a support effect to overcome the possible swing of the support platform caused by the use of the hydraulic bearing.

[0013] Furthermore, the oil inlet of the hydraulic bearing is located on a side away from the support platform, and the upper surface of the main body of the hydraulic bearing does not contact the lower surface of the support platform. Therefore, by locating the oil inlet on the side away from the support platform, the present application reduces the heating of the support platform caused by the oil during oil inflow, thereby maximizing the accuracy of vibration testing.

[0014] The present invention also provides a vibration testing system, including a vibration table and the aforementioned workpiece fixing table for vibration testing, wherein the ratio of the larger of the length and width values ​​of the workpiece fixing table to the length value of the workpiece to be tested is less than 1 / 2, and the vibration table is connected to a carrier. When performing a vibration test, the carrier can be detachably set on at least two of the workpiece fixing tables, and the setting position of the workpiece fixing table can be adjusted.

[0015] Furthermore, the support platform is provided with a plurality of first mounting holes for mounting the carrier. The vibration testing system also includes a base for mounting the workpiece fixing platform, and the workpiece fixing platform is provided with second mounting holes for connecting to the base. Thus, the position of the carrier on the support platform can be adjusted as needed, and the position of the workpiece fixing platform of the present invention can be adjusted as needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the three-dimensional structure of a workpiece fixing platform for vibration testing according to the first embodiment of the present invention; Figure 2 Schematic diagram of a top view of a workpiece fixing platform for vibration testing according to a first embodiment of the present invention; Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure from the medium AA perspective; Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure from the perspective of the middle BB; Figure 5 Schematic diagram of the connection relationship between the carrying platform and the upper support seat in embodiment 1 of the present invention; Figure 6 It is a partial cross-sectional structural diagram of the support rod and the adjustment end in cooperation with each other according to the first embodiment of the present invention; Figure 7 A schematic diagram of the three-dimensional structure of performing a vibration test on a workpiece using the vibration testing system according to the second embodiment of the present invention; Figure 8 This is a schematic diagram of the three-dimensional structure of performing a vibration test on a workpiece in another direction using the vibration testing system according to the second embodiment of the present invention; Figure 9 A schematic diagram of the three-dimensional structure of an implementation method of the vibration testing system of Example 2; Figure 10 This is a structural diagram of using a vibration table to push a large slide for vibration testing in the prior art.

[0017] In the picture: 1. Connect the base; 11. Mounting hole 2; 2. Carrying platform; 21. Connecting plate; 211. Guide opening; 22. Mounting hole 1; 3. Hydraulic bearing; 31. Bearing base plate; 32. Oil inlet; 33. Oil distribution valve; 34. Oil inlet pipeline; 4. Bearing shaft; 5. Mounting plate; 6. Support rod; 61. Limiting edge; 71. Upper support seat; 711. Limiting groove 1; 712. Hollow groove 1; 713. Annular abutting surface 1; 714. Support portion 1; 715. Connecting portion; 72, lower support seat; 721, limiting groove 2; 722, hollow groove 2; 8. Adjustment end; 81. Rigid layer 1; 82. Elastic deformation layer; 83. Rigid layer 2; 84. Accommodation hole; 85. Tightening bolt; 9. Vehicle; 10. Base; 12. Vibration table; 13. Large slide; 14. Hollow area. DETAILED DESCRIPTION The preferred embodiments of the present invention are described in detail below 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 precise definition of the protection scope of the present invention.

[0018] See attached Figure 1 、 7 As shown in Figure 8, the workpiece fixing table for vibration testing in this embodiment connects the carrier 9 for fixing the workpiece to at least two workpiece fixing tables at the same time when performing the vibration test. By setting a connecting head between the vibration table and the carrier 9, the vibration force of the vibration table is transmitted to the carrier 9, thereby realizing the vibration test of the workpiece.

[0019] The tabletop area of ​​the workpiece fixing table of the present invention is much smaller than the tabletop of a conventional slide table used for vibration testing. The larger of the length and width of the workpiece fixing table is much smaller than the length of the workpiece and much smaller than the length dimension of the workpiece. For example, the larger of the length and width of the workpiece fixing table is less than 1 / 4 of the length of the workpiece. Taking a workpiece of 150 cm in length as an example, the tabletop size of the workpiece fixing table can be 20 cm*20 cm, or 30 cm*20 cm, or 10*15 cm. Of course, the larger of the length and width of the workpiece fixing table can also be less than 1 / 3.9, 1 / 3.5, 1 / 3 or 1 / 2 of the length of the workpiece, etc. Therefore, by adopting at least two workpiece fixing tables for vibration testing of the present application, compared with adopting a large slide table with a larger tabletop area in the prior art (see attached Figure 10), since the table area and volume of the workpiece fixing table are greatly reduced, the overall weight of the object that needs to be pushed by the vibration table can be effectively reduced, thereby reducing the thrust requirement of the vibration table and correspondingly reducing the cost of using the vibration table.

[0020] The workpiece fixing platform of this embodiment includes a supporting platform 2 and a connecting base 1 which are arranged relatively up and down. When subjected to external force, the supporting platform 2 of the workpiece fixing platform can move in any direction relative to the connecting base 1. The workpiece fixing platform also includes a hydraulic bearing 3 located below the supporting platform 2. A bearing shaft 4 is provided through the middle of the hydraulic bearing 3. The two ends of the bearing shaft 4 pass through the hydraulic bearing 3 and are exposed on both sides of the hydraulic bearing 3. At least two connecting plates 21 which are arranged relatively to each other are provided on one side of the supporting platform 2 close to the hydraulic bearing 3. A guide opening 211 for the bearing shaft 4 to movably penetrate is provided in the middle of the connecting plate 21. The axial direction of the bearing shaft 4 and the guide opening 211 are consistent, and along Figure 1 The connecting plate 21 and the supporting platform 2 may be integral or separate components. Therefore, when the supporting platform 2 is subjected to a force acting in the first direction, the bearing shaft 4 and the guide opening 211 cooperate with each other to achieve the effect of moving in the first direction.

[0021] This application cleverly utilizes a hydraulic bearing 3 with a high pressure-bearing capacity, inserting a bearing shaft 4 therein. Furthermore, a corresponding connecting plate 21 is provided to connect to the support platform 2, allowing the bearing shaft 4 to pass through a guide opening 211 located in the connecting plate 21. This ensures that the support platform 2 can move smoothly along the direction of the bearing shaft 4. Furthermore, the high load-bearing capacity of the hydraulic bearing 3 (up to 3 tons) is utilized to significantly increase the load-bearing capacity of the support platform 2, preventing bearing deformation. Furthermore, this application does not directly utilize the conventional guide rail guidance structure of the prior art because conventional single-direction guide structures are prone to dry friction and can cause adhesion and interlocking between the two components. Furthermore, in practice, during vibration testing, the vibration force applied to the support platform 2 is often not in a single linear direction. Existing guide rail-type guide structures often cannot effectively match the forces acting on the support platform 2, thus easily causing slight bending of the workpiece. Furthermore, since the guide structure is continuously subjected to forces not in its guiding direction, it also suffers from significant wear.

[0022] In some embodiments, the connecting plate 21 is disposed near two edges of the supporting platform 2 that are spaced apart from each other. Thus, after the bearing shaft 4 extends from the hydraulic bearing 3, it passes through the guide opening 211. Thus, the supporting platform 2 can achieve movement along the first direction through the structural cooperation between the bearing shaft 4 and the guide opening 211.

[0023] In some embodiments, the hydraulic bearing 3 is disposed on a bearing base plate 31. The workpiece fixing table further includes a mounting plate 5 for fixing the bearing base plate 31. The mounting plate 5 is slidably connected to the connecting base 1 and can move relative to the connecting base 1 along the second direction.

[0024] In some embodiments, the second direction is perpendicular to the first direction. Thus, the workpiece fixture can move in the first direction and / or the second direction. Therefore, when a workpiece is placed on the workpiece fixture and is subject to vibration and tends to move slightly, the support platform 2 of the workpiece fixture can also move synchronously with the vibration without damaging the workpiece.

[0025] Sliding connection between the mounting plate 5 and the connecting base 1 in the second direction can be achieved by providing a slide rail and a slider structure on the adjacent surfaces of the mounting plate 5 and the connecting base 1, respectively. Providing a slide rail structure between the connecting base 1 and the mounting plate 5 instead of the hydraulic bearing 3 eliminates the need for the hydraulic bearing 3. Because the connecting base 1 is located farther from the vibration source, it is less susceptible to the negative effects of vibration, eliminating the need for the hydraulic bearing 3. This also reduces the complexity and weight of the overall workpiece fixture structure. In some embodiments, the workpiece mounting platform further includes at least one set of support rods 6 connected to the support platform 2 and the mounting plate 5. Each set of support rods 6 includes two support rods, which are positioned adjacent to two opposing edges of the workpiece mounting platform. Thus, the support rods 6 ensure that the support platform 2 remains oriented toward the workpiece, thereby providing support for the workpiece.

[0026] In some embodiments, the support rods 6 are arranged in two groups, that is, the support rods 6 are arranged in pairs at two opposite edges of the workpiece fixing platform, thereby providing better support for the support platform 2. In other possible embodiments, the support rods 6 may be arranged in multiple groups, and the spacing between the support rods 6 in each group can be adjusted as needed.

[0027] In some embodiments, the support rod 6 is located on the side of the hydraulic bearing 3, and the support rod 6 is located in the plane of the swing direction of the hydraulic bearing 3. The support rod 6 is arranged on this side of the hydraulic bearing 3 to provide a supporting effect to overcome the possible swing of the support platform 2 caused by the use of the hydraulic bearing 3.

[0028] In some embodiments, the combination Figure 2-6As shown, the support rod 6 is connected to the support platform 2 via an upper support seat 71 and to the mounting plate 5 via a lower support seat 72. An adjustment end portion 8 is also provided within the upper support seat 71, sleeved outside the upper end portion of the support rod 6. A receiving hole 84 for the upper end portion of the support rod 6 is provided in the middle of the adjustment end portion 8. The adjustment end portion 8 comprises, arranged in order from the outside to the inside, a rigid layer 1 81, an elastic deformation layer 82 (which may be made of a material with a certain degree of elasticity, such as rubber or silicone), and a rigid layer 2 83. Accordingly, a first retaining groove 711 is provided within the upper support seat 71 for engaging and accommodating the adjustment end portion 8; a second retaining groove 721 is provided within the lower support seat 72 for engaging and accommodating the adjustment end portion 8.

[0029] The present application provides an adjustment end portion 8 and sandwiches an elastic deformation layer 82 therein, thereby allowing the connection between the support rod 6 and the supporting platform 2 and the connecting base 1 to have a certain deformation space. Therefore, when performing a vibration test, the vibration force brought by the vibration table to the workpiece fixing platform can be offset to a certain extent, thereby exerting a shock-absorbing effect and eliminating the noise during the vibration test to a certain extent.

[0030] In some embodiments, the support rod 6 is further provided with a limiting edge 61 below the upper support seat 71. Typically, a certain gap is reserved between the upper surface of the limiting edge 61 and the lower surface of the upper support seat 71. Accordingly, a certain gap is also reserved between the upper end of the support rod 6 and the upper bottom of the limiting groove 1 711. Accordingly, the support rod 6 is also provided with a limiting edge 61 above the lower support seat 72, and a certain gap is reserved between the lower surface of the limiting edge 61 and the upper surface of the lower support seat 72. This allows the support rod 6 to have a certain amount of displacement space in its axial direction, thereby allowing the support platform 2 to have room to slightly swing or adjust during vibration testing of the workpiece.

[0031] In some embodiments, the lower support seat 72 is also provided with an adjustment end portion 8 identical to that located in the upper support seat 71. The adjustment end portions 8 located in the upper support seat 71 and the lower support seat 72 are symmetrically arranged in a vertical direction. Therefore, the adjustment end portions 8 located in the upper support seat 71 and the lower support seat 72 can ensure the support rigidity of the support rod 6 and reduce the vibration of the support platform 2 during workpiece testing.

[0032] In some embodiments, a hollow groove 1 712 is further provided in the area corresponding to the adjustment end 8 within the upper support seat 71. The hollow groove 1 712 extends to the outer surface of the upper support seat 71. The hollow groove 1 712 can be used to adjust whether the adjustment end 8 is properly installed. The inner diameter of the hollow groove 1 712 is smaller than the inner diameter of the limiting groove 1 711. Therefore, an annular abutting surface 1 713 is formed at the connection between the hollow groove 1 712 and the limiting groove 1 711 to engage the adjustment end 8. Correspondingly, a hollow groove 2 722 is provided within the lower support seat 72. The inner diameter of the hollow groove 2 722 is smaller than the inner diameter of the limiting groove 2 721. As a result, the adjustment end 8 within the lower support seat 72 can abut against the annular abutting surface 2 located between the hollow groove 2 722 and the limiting groove 2 721.

[0033] Combined with attachment Figure 5 As shown, in some embodiments, the upper support seat 71 has a connection portion 715 fixed to the load-bearing platform 2 and a support portion 1 714 connected to the upper end of the support rod 6. The connection portion 715 is located on the side of the load-bearing platform 2, and the support portion 1 714 is located on the bottom surface of the load-bearing platform 2. The cross-section of the upper support seat 71 is L-shaped, thereby providing a better support effect for the load-bearing platform 2. The adjustment end portion 8 connected to the upper end of the support rod 6 is located within the support portion 1 714. There is a height difference between the upper groove bottom of the limiting groove 1 711 and the upper surface of the support portion 1 714. As a result, the support rod 6 can form a stable support for the load-bearing platform 2 within the support portion 1 714 through the adjustment end portion 8, while maintaining sufficient mechanical strength.

[0034] In some embodiments, at least one tightening bolt 85 is provided on the outer side of the adjustment end 8 facing the upper support seat 71 and the lower support seat 72, passing through the groove wall of the limiting groove 1 721 of the upper support seat 71 or the limiting groove 2 721 of the lower support seat 72. The axial direction of the tightening bolt 85 is perpendicular to the axial direction of the support rod 6, and the adjustment end 8 can be tightened and fixed by the tightening bolt 85. In some embodiments, the support platform 2 is further provided with a plurality of mounting holes 22 for mounting the carrier 9, so that the position of the carrier 9 on the support platform 2 can be adjusted as needed. In some embodiments, the connecting base 1 is provided with a plurality of mounting holes 11, so that the position of the workpiece fixing platform of the present invention can be adjusted as needed.

[0035] In some embodiments, see Appendix Figure 9As shown, the oil inlet 32 ​​of the hydraulic bearing 3 is located on a side away from the support platform 2, and the upper surface of the main body of the hydraulic bearing 3 does not contact the lower surface of the support platform 2. Therefore, the present application sets the oil inlet 32 ​​on a side away from the support platform 2 to reduce the heating of the support platform 2 caused by the oil supply, thereby maximizing the accuracy of the vibration test. Precisely because the present application sets a gap between the hydraulic bearing 3 and the support platform 2, the support force for the support platform 2 is mainly achieved by the support rod 6, so the rigidity requirements of the support rod are relatively high. At the same time, the adjustable end 8 set at the end of the support rod 6 offsets the noise or shaking caused by the vibration of the support platform 2. Therefore, the workpiece fixing platform of the present invention maintains sufficient mechanical strength while minimizing the overall volume and weight. When multiple workpiece fixing platforms work together, the overall coordination is good, and the testing of the workpiece will not be interfered with, and the workpiece will not be bent due to testing.

[0036] When multiple workpiece fixing tables are required, the oil inlet pipes 34 of each workpiece fixing table can be connected to an oil distribution valve 33 to supply oil to each hydraulic bearing 3 respectively. The number of oil distribution valves can also be increased as needed.

[0037] Example 2: This embodiment is a vibration testing system, which includes a vibration table 12 and at least two workpiece fixing tables for vibration testing according to the first embodiment.

[0038] The vibration testing system of this embodiment does not include a sliding table as in the prior art, but instead includes only at least two workpiece fixtures that can be arbitrarily adjusted and are relatively small in size. However, when using only the workpiece fixture of this application as a support surface for the workpiece, due to its small surface area, the support force required of a single workpiece fixture is higher. By adopting the structure of the workpiece fixture of Example 1, this application provides sufficient load-bearing capacity. Furthermore, since the vibration testing system of this embodiment may require multiple workpiece fixtures (for example, four, five, or even more workpiece fixtures may be required for longer workpieces) to serve as a support surface for the workpiece, better coordination between the various workpiece fixtures is required to minimize damage to the workpiece. The workpiece fixture of this application utilizes a hydraulic bearing 3 and a second-direction slide rail, allowing its support platform 2 to have a certain amount of free movement. Furthermore, the slight circumferential swing provided by the hydraulic bearing 3, in conjunction with the support rod 6, allows the support platform 2 to have a certain degree of adjustment capability consistent with the workpiece's motion during vibration testing while ensuring sufficient support strength for the workpiece.

[0039] Combined with attachment Figure 7 and 8As shown, in some embodiments, the number of workpiece fixing tables is 4 as an example. When the workpiece is 150 cm long and 5 cm wide, if the table size of the workpiece fixing table is 20 cm*20 cm, and it is arranged in sequence along the length direction of the workpiece. There is a hollow area 14 between each workpiece fixing table, and no table structure is required. In addition, the table width of each workpiece fixing table of the present application is much smaller than the width of the slide in the prior art. When it is necessary to perform a vibration test on the workpiece along its axial direction, each workpiece fixing table is arranged according to the following steps: Figure 7 Arrange and fix on the base 10 in the manner shown; when the workpiece needs to be subjected to a vibration test perpendicular to its axial direction, each workpiece fixing table is arranged according to Figure 8 The present invention connects the extended table of the vibration table 12 directly to the carrier 9 of the workpiece, and no longer needs to set up a large slide structure, thereby greatly reducing the thrust requirement of the vibration table. Figure 7 and Figure 8 For the vibration test of the workpiece, the width of the large slide should be similar to the length of the workpiece, so the thrust required to push the large slide is extremely large. The solution of the present application can greatly reduce the power requirement of the vibration table.

[0040] After the workpiece is fixed to the workpiece fixing table, the connector of the vibration table is directly connected to the carrier 9. Compared with the conventional large-surface slide as the workpiece support platform, the vibration test system of this embodiment has a greatly reduced area and volume. Accordingly, the thrust required by the vibration table is also significantly reduced. For example, a 10-ton thrust vibration table can be directly replaced with a 5-ton vibration table to achieve the same vibration test purpose. As the thrust of the vibration table increases, its production cost will also increase significantly. Therefore, this application can greatly reduce the cost and power consumption requirements of vibration testing.

[0041] In addition, each workpiece fixing table in the present application can be detachably arranged on the base 10, and the number and position of each workpiece fixing table can be arbitrarily adjusted according to the shape and size of the workpiece, thereby being able to meet more diverse testing requirements.

[0042] The above embodiments are only for illustrating the technical concept and features of the present invention. Its purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. It cannot be used to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A workpiece fixing table for vibration testing, characterized in that: It comprises a supporting platform (2) and a connecting base (1) arranged relatively to each other in an upper and lower direction, wherein the supporting platform (2) is movable relative to the connecting base (1), and further comprises: A hydraulic bearing (3), the hydraulic bearing (3) being located below the bearing platform (2), A bearing shaft (4), the bearing shaft (4) passes through the hydraulic bearing (3) and is connected to the bearing platform (2), a guide opening (211) for the bearing shaft (4) to movably penetrate is provided on the bearing platform (2), and the bearing platform (2) can move in a first direction along the axial direction of the bearing shaft (4), The hydraulic bearing (3) is slidably connected to the connecting base (1). When the workpiece is subjected to a force in a second direction, the hydraulic bearing (3) moves along the second direction, and the supporting platform (2) can move in the second direction. The second direction is not collinear with the first direction. The ratio of the larger of the length and width of the workpiece fixing platform to the length of the workpiece to be tested is less than 1 / 2, and when performing a vibration test, the carrier (9) is simultaneously placed on at least two of the workpiece fixing platforms.

2. The workpiece fixing table for vibration testing according to claim 1, characterized in that: The workpiece fixing table further comprises a mounting plate (5) for fixing the hydraulic bearing (3), and mutually cooperating slide rails and sliders are respectively provided on mutually adjacent surfaces of the mounting plate (5) and the connecting base (1), and the mounting plate (5) and the connecting base (1) are slidably connected to each other.

3. The workpiece fixing table for vibration testing according to claim 2, characterized in that: The workpiece fixing platform further comprises at least one set of support rods (6) respectively connected to the supporting platform (2) and the mounting plate (5), and an adjustment end portion (8) is respectively sleeved on both ends of the support rods (6), and the adjustment end portion (8) comprises a rigid layer 1 (81), an elastic deformation layer (82) and a rigid layer 2 (83) which are sequentially arranged from the outside to the inside.

4. The workpiece fixing table for vibration testing according to claim 3, characterized in that: The support rod (6) is connected to the support platform (2) through the upper support seat (71), and a limiting groove (711) for clamping and accommodating the adjustment end (8) is provided in the upper support seat (71), and a hollow groove (712) is also provided in the area corresponding to the adjustment end (8) in the upper support seat (71), and the hollow groove (712) extends to the outer surface of the upper support seat (71), and the inner diameter of the hollow groove (712) is smaller than the inner diameter of the limiting groove (711). An annular abutting surface (713) for clamping the adjustment end (8) is formed at the connection between the hollow groove (712) and the limiting groove (711). The support rod (6) is connected to the mounting plate (5) via a lower support seat (72), and a second limiting groove (721) for clamping and accommodating the adjustment end (8) is provided in the lower support seat (72), and a second hollow groove (722) is provided in the lower support seat (72), and the inner diameter of the second hollow groove (722) is smaller than the inner diameter of the second limiting groove (721).

5. The workpiece fixing table for vibration testing according to claim 4, characterized in that: The support rod (6) is further provided with a limiting edge (61) below the upper support seat (71), and an adjustment gap is reserved between the limiting edge (61) and the upper support seat (71).

6. The workpiece fixing table for vibration testing according to claim 4, characterized in that: The upper support seat (71) includes a connecting portion (715) and a supporting portion (714). The connecting portion (715) is fixed to the supporting platform (2), the supporting portion (714) is connected to the upper end of the supporting rod (6), the connecting portion (715) is located on the side of the supporting platform (2), the supporting portion (714) is located on the bottom surface of the supporting platform (2), the adjusting end (8) connected to the upper end of the supporting rod (6) is located in the supporting portion (714), and there is a height difference between the upper groove bottom of the limiting groove (711) and the upper surface of the supporting portion (714).

7. The workpiece fixing table for vibration testing according to any one of claims 3 to 6, characterized in that: The support rod (6) is located on a side of the hydraulic bearing (3), and the support rod (6) is located in a plane where the swing direction of the hydraulic bearing (3) is located.

8. The workpiece fixing table for vibration testing according to any one of claims 1 to 6, characterized in that: The oil inlet (32) of the hydraulic bearing (3) is arranged on a side away from the bearing platform (2), and the upper surface of the main body of the hydraulic bearing (3) does not contact the lower surface of the bearing platform (2).

9. A vibration testing system comprising a vibration table (12), characterized in that It also includes a workpiece fixing table for vibration testing according to any one of claims 1 to 8, wherein the ratio of the larger of the length and width of the workpiece fixing table to the length of the workpiece to be tested is less than 1 / 2, and the vibration table (12) is connected to the carrier (9). When performing the vibration test, the carrier (9) can be detachably set on at least two of the workpiece fixing tables, and the setting position of the workpiece fixing table can be adjusted.

10. The vibration testing system according to claim 9, characterized in that: The supporting platform (2) is further provided with a plurality of mounting holes (22) for setting the carrier (9). The vibration testing system further comprises a base (10) for setting the workpiece fixing platform. The workpiece fixing platform is further provided with mounting holes (11) for connecting with the base (10).

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