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

Abstract

The application discloses a workpiece fixing table for vibration test and a vibration test system comprising the same. The workpiece fixing table comprises a bearing table, a connecting base, a hydraulic bearing and a bearing shaft. The bearing table is movable relative to the connecting base. The hydraulic bearing is located below the bearing table. The bearing shaft penetrates the hydraulic bearing and is connected with the bearing table. The bearing table is movable in a first direction along the axial direction of the bearing shaft. The hydraulic bearing is in sliding connection with the connecting base. The bearing table is movable in a second direction. The second direction is not collinear with the first direction. The ratio of the larger one between the length and the width of the workpiece fixing table and the length of the workpiece to be tested is less than 1 / 2. During the vibration test, the carrier is arranged on at least two workpiece fixing tables. By using at least two workpiece fixing tables, the thrust requirement of the vibration table is effectively reduced, and the use cost of the vibration table is correspondingly reduced.

Description

Technical Field

[0001] This invention relates to the field of vibration testing technology, and more specifically to a workpiece fixing platform for vibration testing and a vibration testing system comprising the platform. Background Technology

[0002] When conducting vibration tests, if the workpiece is too large to be tested directly on the vibration table, a slide is installed on the side of the vibration table, and the table surface of the vibration table is connected to the slide using a clamp. Before testing, the workpiece is first fixed to the slide surface using a fixture, and then the clamp of the vibration table is connected to the slide surface.

[0003] The existing slide table includes a base and a slide table surface with a large length and / or width set on the base (see Appendix). Figure 10 (As shown). Currently, when conducting vibration tests on workpieces with large length and / or width, a slide table with a large surface area is often required to adequately support the workpiece. For example, when the workpiece is long and narrow, the width of the slide table inevitably needs to be increased to match its length, resulting in a larger overall volume and weight of the slide table. When the workpiece is a relatively regular large size, the overall area of ​​the slide table must also be increased, so the weight of the slide table surface is also greater. Therefore, the required output thrust of the vibration table is also larger, which in turn increases the power requirement of the vibration table, resulting in high energy consumption and high cost. Summary of the Invention

[0004] To overcome the above-mentioned shortcomings, the present invention aims to provide a workpiece fixing stage for vibration testing, comprising a support platform and a connecting base arranged opposite each other, wherein the support platform is movable relative to the connecting base, and further comprising:

[0005] A hydraulic bearing is located below the support platform.

[0006] A bearing shaft passes through the hydraulic bearing and is connected to the support platform. The support platform has a guide opening for the bearing shaft to movably pass through. The support platform is movable along the axial direction of the bearing shaft in a first direction.

[0007] The hydraulic bearing is slidably connected to the connecting base. When the workpiece is subjected to a force in the second direction, the hydraulic bearing moves along the second direction, and the support platform can move in the second direction. The second direction is not collinear with the first direction.

[0008] The ratio of the larger of the length and width values ​​of the workpiece fixing platform to the length value of the workpiece to be tested is less than 1 / 2. During vibration testing, the carrier is simultaneously placed on at least two of the workpiece fixing platforms.

[0009] This application has the following beneficial effects:

[0010] ① This application replaces the large slide table structure in the prior art, and by using at least two workpiece fixing stages for vibration testing, it significantly reduces the area and volume of the workpiece fixing stage, thus effectively reducing the thrust requirement of the vibration table and correspondingly reducing the operating cost and power consumption of the vibration table; in addition, since the workpiece fixing stage is detachably set on the base, the layout of the workpiece fixing stage can be adjusted arbitrarily according to the test requirements, thereby meeting diverse test needs in practice.

[0011] ② By utilizing a hydraulic bearing with high pressure bearing capacity and inserting a bearing shaft inside it, this application ensures that the bearing platform can move smoothly along the axial direction of the bearing shaft without bearing deformation, and ensures that the bearing platform has high load-bearing capacity and long service life. Thus, it is possible to make the bearing platform have sufficient mechanical strength with only a small area and volume.

[0012] ③ Due to the small size of the support platform in this application, multiple workpiece fixing platforms are often required to fix the same workpiece. Therefore, the requirements for coordination and cooperation between the various workpiece fixing platforms are higher. This application addresses this by installing a hydraulic bearing near the support platform and cooperating with the bearing shaft, enabling the support platform to better follow the force exerted by the workpiece during vibration. Thus, it can meet the vibration testing requirements for long and narrow workpieces. Furthermore, by sliding the hydraulic bearing to the connecting base, the overall structure of the workpiece fixing platform is simpler and lighter while ensuring the free movement of the support platform, further reducing the thrust requirement of the vibration table.

[0013] Furthermore, the workpiece fixing stage also includes a mounting plate for fixing the hydraulic bearing. Mutually cooperating slide rails and sliders are respectively provided on the adjacent surfaces of the mounting plate and the connecting base, and the mounting plate and the connecting base slide against each other. By using a slide rail structure between the connecting base and the mounting plate instead of a hydraulic bearing structure, the negative impact of vibration on the connecting base is relatively small since it is located away from the vibration source. Moreover, since the connecting base is not the primary direction of movement during vibration testing, the hydraulic bearing structure is unnecessary, and the overall complexity and weight of the workpiece fixing stage are reduced.

[0014] Furthermore, the workpiece fixing stage also includes at least one set of support rods respectively connected to the bearing platform and the mounting plate. An adjusting end is fitted at each end of the support rod, and the adjusting end includes, from the outside in, a rigid layer one, an elastic deformation layer, and a rigid layer two. This allows for a certain deformation space in the connection between the support rod and the bearing platform and connecting base. Therefore, during vibration testing, it has a certain offsetting effect on the vibration force exerted by the vibration table on the workpiece fixing stage, thereby achieving a vibration reduction effect and eliminating noise during vibration testing to some extent.

[0015] Furthermore, the support rod is connected to the bearing platform via an upper support base. A limiting groove is provided within the upper support base for engaging and accommodating the adjusting end. A perforated groove is also provided within the upper support base in the area corresponding to the adjusting end. The perforated groove extends to the outer surface of the upper support base, and its inner diameter is smaller than that of the limiting groove. An annular abutment surface is formed at the connection between the perforated groove and the limiting groove to engage the adjusting end.

[0016] The support rod is connected to the mounting plate via a lower support base. A second limiting groove for engaging and accommodating the adjusting end is provided within the lower support base. A second hollow groove is also provided within the lower support base, the inner diameter of which is smaller than the inner diameter of the second limiting groove. Therefore, this application, by providing the limiting groove and the hollow groove, facilitates a stable connection to the adjusting end and simplifies installation. The hollow groove allows for adjustment and observation of whether the adjusting end is properly installed, facilitating the installation of the adjusting end within the upper support base.

[0017] Furthermore, a limiting edge is provided below the upper support seat on the support rod, and an adjustment gap is reserved between the limiting edge and the upper support seat. This allows the support rod to have a certain displacement space in its axial direction, thereby enabling the support platform to have space for slight swaying or adjustment during vibration testing of the workpiece.

[0018] Furthermore, the upper support includes a connecting part and a support part one. The connecting part is fixed to the support platform, and the support part one is connected to the upper end of the support rod. The connecting part is located on the side of the support platform, and the support part one is located on the bottom surface of the support platform. The adjusting end connected to the upper end of the support rod is located inside the support part one, and there is a height difference between the bottom of the upper groove of the limiting groove one and the upper surface of the support part one. Therefore, the support rod, through the adjusting end, can form a stable support for the support platform within the support part one while maintaining sufficient mechanical strength.

[0019] Furthermore, the support rod is located on the side of the hydraulic bearing, and the support rod lies in the plane of the hydraulic bearing's swing direction. Positioning the support rod on this side of the hydraulic bearing is intended to provide support and counteract any potential swaying of the support platform caused by the use of the hydraulic bearing.

[0020] Furthermore, the oil inlet of the hydraulic bearing is located on the side away from the support platform, and the upper surface of the hydraulic bearing body does not contact the lower surface of the support platform. Therefore, by placing the oil inlet on the side away from the support platform, this application reduces the heat generated on the support platform during oil injection, thereby maximizing the accuracy of vibration testing.

[0021] 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, the vibration table is connected to a carrier, and during vibration testing, the carrier is detachably mounted on at least two of the workpiece fixing tables, and the mounting position of the workpiece fixing tables is adjustable.

[0022] Furthermore, the support platform is provided with a plurality of mounting holes for mounting the carrier, and the vibration testing system also includes a base for mounting the workpiece fixing platform, with mounting holes for connecting to the base on the workpiece fixing platform. Therefore, the position of the carrier on the support platform can be adjusted as needed, and the position of the workpiece fixing platform can be arbitrarily adjusted as required. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of a workpiece fixing platform for vibration testing according to Embodiment 1 of the present invention;

[0024] Figure 2 This is a top view of the workpiece fixing platform for vibration testing according to Embodiment 1 of the present invention.

[0025] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure from the perspective of the middle AA (analogous to ...

[0026] Figure 4 for Figure 2 A schematic diagram of the cross-sectional structure from the perspective of the middle BB (British Biological Building).

[0027] Figure 5 This is a schematic diagram showing the connection relationship between the support platform and the upper support base in Embodiment 1 of the present invention;

[0028] Figure 6This is a partial cross-sectional view of the support rod and the adjusting end in embodiment one of the present invention.

[0029] Figure 7 This is a three-dimensional structural schematic diagram of a workpiece being tested for vibration using the vibration testing system of Embodiment 2 of the present invention;

[0030] Figure 8 This is a three-dimensional structural schematic diagram of a workpiece being vibrated in another direction using the vibration testing system of Embodiment 2 of the present invention;

[0031] Figure 9 This is a three-dimensional structural schematic diagram of one embodiment of the vibration testing system of Example 2;

[0032] Figure 10 This is a schematic diagram of a structure in the prior art that uses a vibration table to push a large slide table for vibration testing.

[0033] In the picture:

[0034] 1. Connecting base; 11. Mounting hole two;

[0035] 2. Support platform; 21. Connecting plate; 211. Guide opening; 22. Mounting hole one;

[0036] 3. Hydraulic bearing; 31. Bearing base plate; 32. Oil inlet; 33. Oil distributor valve; 34. Oil inlet pipeline;

[0037] 4. Bearing shaft;

[0038] 5. Mounting plate;

[0039] 6. Support rod; 61. Limiting edge;

[0040] 71. Upper support base; 711. Limiting groove 1; 712. Hollowed-out groove 1; 713. Annular abutment surface 1; 714. Support part 1; 715. Connecting part;

[0041] 72. Lower support base; 721. Limiting groove two; 722. Hollowed-out groove two;

[0042] 8. Adjusting end; 81. Rigid layer one; 82. Elastic deformation layer; 83. Rigid layer two; 84. Receiving hole; 85. Tightening bolt;

[0043] 9. Vehicle; 10. Base;

[0044] 12. Vibration table; 13. Large slide table; 14. Hollowed-out area. Detailed Implementation

[0045] 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.

[0046] See appendix Figure 1 , 7 As shown in Figure 8, in this embodiment, the workpiece fixing table for vibration testing connects the carrier 9 for fixing the workpiece to at least two workpiece fixing tables simultaneously during vibration testing. By setting a connector 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.

[0047] The workpiece fixing stage of this invention has a surface area much smaller than that of a conventional slide table for vibration testing. The larger of the length and width values ​​of the workpiece fixing stage is much smaller than both the length and width of the workpiece. For example, the larger of the length and width values ​​is less than 1 / 4 of the workpiece length. Taking a workpiece length of 150cm as an example, the surface size of the workpiece fixing stage can be 20cm*20cm, 30cm*20cm, or 10*15cm. Of course, the larger of the length and width values ​​can also be less than 1 / 3.9, 1 / 3.5, 1 / 3, or 1 / 2 of the workpiece length, etc. Therefore, by using at least two workpiece fixing stages for vibration testing as described in this application, compared with the use of a large slide table with a larger surface area in the prior art (see appendix...), the... Figure 10 Compared to other methods, the overall weight of the object to be pushed by the vibration table is effectively reduced because the area and volume of the workpiece fixing table are greatly reduced. This reduces the thrust requirement of the vibration table and correspondingly lowers the operating cost of the vibration table.

[0048] The workpiece fixing table in this embodiment includes a support platform 2 and a connecting base 1 arranged vertically opposite each other. When subjected to external force, the support platform 2 of the workpiece fixing table can move relative to the connecting base 1 in any direction. The workpiece fixing table also includes a hydraulic bearing 3 located below the support platform 2. A bearing shaft 4 is provided through the middle of the hydraulic bearing 3, and the two ends of the bearing shaft 4 protrude from the hydraulic bearing 3 and are exposed on both sides of the hydraulic bearing 3. At least two opposing connecting plates 21 are provided on the side of the support platform 2 near the hydraulic bearing 3. A guide opening 211 is provided in the middle of the connecting plate 21 for the bearing shaft 4 to be movably inserted. The axial direction of the bearing shaft 4 and the guide opening 211 is consistent and along the axis of the bearing shaft 4. Figure 1 The first direction. The connecting plate 21 and the support platform 2 can be an integral or separate structural component. Therefore, when the support platform 2 is subjected to a force along the first direction, it can move along the first direction through the cooperation of the bearing shaft 4 and the guide opening 211.

[0049] This application cleverly utilizes a hydraulic bearing 3 with high pressure bearing capacity, and inserts a bearing shaft 4 inside it. Simultaneously, a connecting plate 21 is provided to connect with the support platform 2, allowing the bearing shaft 4 to pass through a guide opening 211 located on 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 (up to 3 tons) of the hydraulic bearing 3 greatly improves the load-bearing capacity of the support platform 2, preventing bearing deformation. In addition, this application does not directly adopt the guide structure of ordinary guide rails in the prior art because traditional unidirectional guide structures are prone to dry friction and can cause adhesion and seizing. Moreover, in practice, during vibration testing, the vibration force on the support platform 2 is often not in a single linear direction. Existing guide rail-type guide structures often cannot better match the force on the support platform 2, thus easily causing slight bending of the workpiece. Furthermore, because the guide structure is continuously subjected to forces not along its guiding direction, the wear of the guide structure itself is also significant.

[0050] In some embodiments, the connecting plate 21 is positioned near the two mutually distant edges of the support platform 2, so that the bearing shaft 4 extends from the hydraulic bearing 3 and passes through the guide opening 211. Therefore, the support platform 2 can achieve movement along the first direction with the structural cooperation between the bearing shaft 4 and the guide opening 211.

[0051] In some embodiments, the hydraulic bearing 3 is disposed on the bearing base plate 31. The workpiece fixing stage also 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 the mounting plate 5 is movable relative to the connecting base 1 in a second direction.

[0052] In some embodiments, the second direction is perpendicular to the first direction. Therefore, the workpiece fixing table can move in the first and / or second directions. Consequently, when a workpiece is placed on the workpiece fixing table, even if it is subjected to vibration and has a slight tendency to move, the support platform 2 of the workpiece fixing table can also move synchronously without damaging the workpiece.

[0053] The sliding connection between the mounting plate 5 and the connecting base 1 in the second direction can be achieved by setting slide rails and slider structures on their adjacent surfaces. By setting a slide rail structure between the connecting base 1 and the mounting plate 5 instead of a hydraulic bearing 3 structure, the negative impact of vibration on the connecting base 1, located away from the vibration source, is relatively small, thus eliminating the need for a hydraulic bearing 3 structure. This also reduces the overall complexity and weight of the workpiece fixing table.

[0054] In some embodiments, the workpiece fixing table further includes at least one set of support rods 6 connected to the support platform 2 and the mounting plate 5 respectively. Each set of support rods 6 includes two rods, which are respectively arranged opposite each other near two opposite edges of the workpiece fixing table. Therefore, by providing support rods 6, it can be ensured that the support platform 2 remains facing the workpiece, thereby providing support for the workpiece.

[0055] In some embodiments, the support rods 6 are arranged in two groups, that is, the support rods 6 are arranged in pairs on two opposite edges near the workpiece fixing table, thus providing better support for the bearing table 2. In other possible embodiments, the support rods 6 may also be in multiple groups, and the spacing between each group of support rods 6 can be adjusted as needed.

[0056] 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. Positioning the support rod 6 on this side of the hydraulic bearing 3 is intended to provide support and counteract any possible swaying of the support platform 2 caused by the use of the hydraulic bearing 3.

[0057] In some implementations, in conjunction with the appendix Figure 2-6 As shown, the support rod 6 is connected to the bearing platform 2 via the upper support base 71 and to the mounting plate 5 via the lower support base 72. Inside the upper support base 71, an adjusting end 8 is sleeved on the outer side of the upper end of the support rod 6. The adjusting end 8 has a receiving hole 84 in its center for the upper end of the support rod 6. The adjusting end 8 includes, from the outside in, a rigid layer 81, an elastic deformation layer 82 (which can be a material with a certain elasticity, such as rubber or silicone), and a rigid layer 83. Correspondingly, the upper support base 71 has a limiting groove 711 for engaging and accommodating the adjusting end 8; and the lower support base 72 has a limiting groove 721 for engaging and accommodating the adjusting end 8.

[0058] This application provides an adjustment end 8 with an elastic deformation layer 82 sandwiched inside it, which allows the connection between the support rod 6 and the bearing platform 2 and the connecting base 1 to have a certain deformation space. Therefore, during vibration testing, it has a certain effect of offsetting the vibration force brought by the vibration table to the workpiece fixing table, thereby playing a shock absorption role and also eliminating noise during vibration testing to a certain extent.

[0059] In some embodiments, a limiting edge 61 is provided below the upper support base 71 for the support rod 6. Typically, a certain gap is reserved between the upper surface of the limiting edge 61 and the lower surface of the upper support base 71. Correspondingly, a certain gap is also reserved between the upper end of the support rod 6 and the bottom of the upper groove 711. Similarly, a limiting edge 61 is also provided above the lower support base 72 for the support rod 6, with a certain gap reserved between the lower surface of the limiting edge 61 and the upper surface of the lower support base 72. Therefore, the support rod 6 can have a certain displacement space in its axial direction, thereby allowing the bearing platform 2 to have space for slight swaying or adjustment during vibration testing of the workpiece.

[0060] In some embodiments, the same adjustment end 8 as that located in the upper support 71 is also provided in the lower support 72, and the adjustment ends 8 provided in the upper support 71 and the lower support 72 are arranged symmetrically. Therefore, under the action of the adjustment ends 8 located in the upper support 71 and the lower support 72, the supporting rigidity of the support rod 6 itself can be guaranteed, and the vibration of the bearing platform 2 itself can be reduced during workpiece testing.

[0061] In some embodiments, a perforated groove 712 is provided in the area corresponding to the adjusting end 8 within the upper support 71. The perforated groove 712 extends to the outer surface of the upper support 71, allowing adjustment of whether the adjusting end 8 is properly installed. The inner diameter of the perforated groove 712 is smaller than the inner diameter of the limiting groove 711, thus forming an annular abutment surface 713 at the connection between the perforated groove 712 and the limiting groove 711, which engages the adjusting end 8. Correspondingly, a perforated groove 722 is provided in the lower support 72. The inner diameter of the perforated groove 722 is smaller than the inner diameter of the limiting groove 721, allowing the adjusting end 8 within the lower support 72 to abut against the annular abutment surface 722 between the perforated groove 722 and the limiting groove 721 located therein.

[0062] Combined with appendix Figure 5 As shown, in some embodiments, the upper support 71 has a connecting portion 715 fixed to the support platform 2 and a support portion 714 connected to the upper end of the support rod 6. The connecting portion 715 is located on the side of the support platform 2, and the support portion 714 is located on the bottom surface of the support platform 2. The upper support 71 has an L-shaped cross-section, thus providing better support for the support platform 2. The adjusting end 8 connected to the upper end of the support rod 6 is located within the support portion 714. There is a height difference between the bottom of the upper groove of the limiting groove 711 and the upper surface of the support portion 714, thereby enabling the support rod 6 to provide stable support for the support platform 2 within the support portion 714 through the adjusting end 8, while maintaining sufficient mechanical strength.

[0063] In some embodiments, at least one tightening bolt 85 is provided on the outside of the adjusting end 8 facing the upper support 71 and the lower support 72, passing through the groove wall of the limiting groove 711 of the upper support 71 or the limiting groove 721 of the lower support 72. The axial direction of the tightening bolt 85 is perpendicular to the axial direction of the support rod 6, and the adjusting end 8 can be tightened and fixed by the tightening bolt 85.

[0064] 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 mounting 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 mounting position of the workpiece fixing table of the present invention can be arbitrarily adjusted as needed.

[0065] In some implementations, see Appendix Figure 9 As shown, the oil inlet 32 ​​of the hydraulic bearing 3 is located on the 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, by placing the oil inlet 32 ​​on the side away from the support platform 2, this application reduces the heat generated on the support platform 2 during oil intake, thereby maximizing the accuracy of vibration testing. Because this application provides 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. Therefore, the rigidity requirement for the support rod is high. At the same time, the adjustment end 8 located at the end of the support rod 6 counteracts the noise or shaking caused by the vibration of the support platform 2. Therefore, the workpiece fixing table of this invention maintains sufficient mechanical strength while minimizing the overall volume and weight. When multiple workpiece fixing tables work together, the overall coordination is good, and it will not interfere with the testing of the workpiece or cause bending of the workpiece due to testing.

[0066] When multiple workpiece fixing stations need to be set up, the oil inlet pipes 34 of each workpiece fixing station can be connected to a common oil distribution valve 33 to supply oil to each hydraulic bearing 3. Alternatively, the number of oil distribution valves can be increased as needed.

[0067] Example 2:

[0068] This embodiment is a vibration testing system, which includes a vibration table 12 and at least two workpiece fixing tables for vibration testing as described in Embodiment 1.

[0069] The vibration testing system of this embodiment does not include the slide table of the prior art, but only includes at least two workpiece fixing tables that can be arbitrarily adjusted in installation position and are small in size. However, when only the workpiece fixing table of this application is used as the support surface of the workpiece, the support force required for a single workpiece fixing table is higher due to its small table area. This application adopts the structure of the workpiece fixing table of Embodiment 1 to make it have sufficient load-bearing capacity; at the same time, since the vibration testing system of this embodiment may require multiple workpiece fixing tables (for example, when the workpiece is long, four, five or even more workpiece fixing tables may be needed to support the workpiece), better coordination between the workpiece fixing tables is required to reduce damage to the workpiece. The workpiece fixing table of this application utilizes a hydraulic bearing 3 and a slide rail in a second direction, so that its bearing platform 2 has a certain amount of free movement space. At the same time, with the slight circumferential swing brought by the hydraulic bearing 3 and the cooperation of the support rod 6, the bearing platform 2 has a certain adjustment ability consistent with the movement trend of the workpiece during vibration testing, and also ensures that the bearing platform 2 has sufficient support strength for the workpiece.

[0070] Combined with appendix Figure 7 and 8 As shown, in some embodiments, taking four workpiece fixing stages as an example, when the workpiece is 150cm long and 5cm wide, if the table surface size of the workpiece fixing stage is 20cm*20cm, and they are arranged sequentially along the length of the workpiece, there is a hollow area 14 between each workpiece fixing stage, eliminating the need for any table surface structure. Furthermore, the table surface width of each workpiece fixing stage in this application is much smaller than the width of the sliding table in the prior art. When it is necessary to perform vibration testing on the workpiece along its axial direction, the workpiece fixing stages are arranged according to... Figure 7 The workpieces are arranged and fixed to the base 10 as shown; when vibration testing of the workpieces is required along a direction perpendicular to their axial direction, the workpiece fixing tables are arranged according to... Figure 8 The components are arranged and fixed to the base 10 as shown. This invention directly connects the extended platform of the vibration table 12 to the workpiece carrier 9, eliminating the need for a large sliding table structure, thereby significantly reducing the thrust requirement of the vibration table. In the prior art, in order to perform… Figure 7 and Figure 8 For vibration testing of workpieces, the width of the large slide table should be similar to the length of the workpiece. Therefore, the thrust required to push the large slide table is extremely large. By adopting the solution of this application, the power requirement of the vibration table can be greatly reduced.

[0071] After fixing the workpiece to the workpiece fixing table, the connector of the vibration table is directly connected to the carrier 9. Compared with the existing technology of using a large-table sliding table as the bearing platform for the workpiece, the vibration testing system of this embodiment has a significantly reduced area and volume, and the required thrust of the vibration table is also significantly reduced. For example, a 5-ton vibration table can be used instead of a 10-ton thrust vibration table to achieve the same vibration testing purpose. As the thrust of the vibration table increases, its production cost will also increase dramatically. Therefore, this application can greatly reduce the cost and power consumption requirements of vibration testing.

[0072] Furthermore, each workpiece fixing stage in this application is detachably mounted on the base 10, and the number and position of each workpiece fixing stage can be adjusted arbitrarily according to the shape and size of the workpiece, thus meeting more diverse testing needs.

[0073] 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 workpiece fixing table for vibration testing, characterized in that, The system includes a support platform (2) and a connecting base (1) arranged vertically opposite each other. The support platform (2) is movable relative to the connecting base (1). The system also includes: Hydraulic bearing (3), the hydraulic bearing (3) is located below the support platform (2), A bearing shaft (4) passes through the hydraulic bearing (3) and is connected to the support platform (2). The support platform (2) is provided with a guide opening (211) through which the bearing shaft (4) can move movably. The support platform (2) can move along the axial direction of the bearing shaft (4) in a first direction. The hydraulic bearing (3) is slidably connected to the connecting base (1). When the workpiece is subjected to a force in the second direction, the hydraulic bearing (3) moves along the second direction, and the bearing platform (2) can move in the second direction. The second direction is not collinear with the first direction. If the ratio of the larger of the length and width values ​​of the workpiece fixing platform to the length value of the workpiece to be tested is less than 1 / 2, the carrier (9) shall be simultaneously placed on at least two of the workpiece fixing platforms during vibration testing. The workpiece fixing table also includes a mounting plate (5) for fixing the hydraulic bearing (3). On the surfaces of the mounting plate (5) and the connecting base (1) that are close to each other, sliding rails and sliders are respectively provided to cooperate with each other. The mounting plate (5) and the connecting base (1) slide against each other. The workpiece fixing table also includes at least one set of support rods (6) that are respectively connected to the bearing platform (2) and the mounting plate (5). An adjustment end (8) is sleeved on both ends of the support rod (6). The adjustment end (8) includes a rigid layer one (81), an elastic deformation layer (82) and a rigid layer two (83) arranged sequentially from the outside to the inside.

2. The workpiece fixing table for vibration testing according to claim 1, characterized in that, The support rod (6) is connected to the bearing platform (2) through the upper support base (71). A limiting groove (711) for engaging and accommodating the adjusting end (8) is provided in the upper support base (71). A hollow groove (712) is also provided in the area corresponding to the adjusting end (8) in the upper support base (71). The hollow groove (712) extends to the outer surface of the upper support base (71). The inner diameter of the hollow groove (712) is smaller than the inner diameter of the limiting groove (711). An annular abutment surface (713) for engaging the adjusting 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) through the lower support base (72). The lower support base (72) is provided with a limiting groove (721) for locking and accommodating the adjusting end (8). The lower support base (72) is provided with a hollow groove (722). The inner diameter of the hollow groove (722) is smaller than the inner diameter of the limiting groove (721).

3. The workpiece fixing table for vibration testing according to claim 2, characterized in that, The support rod (6) is provided with a limiting edge (61) located below the upper support seat (71), and an adjustment gap is reserved between the limiting edge (61) and the upper support seat (71).

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

5. The workpiece fixing table for vibration testing according to any one of claims 1-4, characterized in that, 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).

6. The workpiece fixing table for vibration testing according to any one of claims 1-4, characterized in that, The oil inlet (32) of the hydraulic bearing (3) is located on the 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).

7. 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 1-6, 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, the vibration table (12) is connected to the carrier (9), and during vibration testing, the carrier (9) is detachably mounted on at least two of the workpiece fixing tables, and the mounting position of the workpiece fixing table is adjustable.

8. The vibration testing system according to claim 7, characterized in that, The support platform (2) is also provided with a plurality of mounting holes (22) for mounting the carrier (9). The vibration testing system also includes a base (10) for mounting the workpiece fixing platform. The workpiece fixing platform is also provided with mounting holes (11) for connecting to the base (10).

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