Vibration test clamp for equipment three-way rapid conversion

Abstract

The invention discloses a vibration test fixture equipped with three-way rapid conversion, which comprises a base and a clamping shaft, a cavity is arranged in the middle of the base, a channel is arranged along the middle of the inner surface of the cavity, short channels are respectively arranged at the left end, the right end, the top and the bottom of the inner surface of the cavity, and the short channels and the channel are respectively intersected to form a cross-shaped channel. The cross-shaped channel at the left end of the inner surface of the cavity is opposite to the cross-shaped channel at the right end of the inner surface of the cavity, the cross-shaped channel at the top of the inner surface of the cavity is opposite to the cross-shaped channel at the bottom of the inner surface of the cavity, a product is fixed in the clamping shaft, the clamping shaft is fixed in the cavity in the middle of the base, and the two ends of the clamping shaft can slide along the channels in the inner surface of the cavity. The bottom of the base is fixed on a vibration test bench; the multi-directional vibration device has the advantages that the multi-directional vibration requirement can be met, and the multi-directional vibration device is convenient to use, simple in structure, easy to install and suitable for different products.

Description

Technical Field

[0001] The invention belongs to the technical field of equipment vibration test fixtures, and specifically relates to a vibration test fixture with three-way rapid conversion. Background Art

[0002] When the existing equipment is used for vibration testing, a set of fixtures generally only meets the requirements of a single direction. When the product needs to be tested in multiple directions, the approach usually involves replacing the vibration table or redesigning the fixture. Both approaches have certain defects. The former has the problem of insufficient test equipment capacity, while the latter is time-consuming and labor-intensive. Summary of the invention

[0003] In view of the above-mentioned prior art, the purpose of the present invention is to provide a vibration test fixture that can adapt to multi-directional vibration requirements, is easy to use, and can be used for different products. It can be used to quickly convert the equipment in three directions to meet the situation that the vibration table needs to be replaced or the fixture needs to be redesigned when conducting vibration tests on products in multiple directions.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a vibration test fixture equipped with three-way rapid conversion, including a base and a clamping shaft, a cavity is provided in the middle of the base, a groove is provided along the middle of the inner surface of the cavity, a short groove is provided at the left end, right end, top and bottom of the inner surface of the cavity, and the short groove and the groove are respectively intersected to form a cross-shaped groove, the cross-shaped groove at the left end of the inner surface of the cavity is arranged opposite to the cross-shaped groove at the right end, the cross-shaped groove at the top of the inner surface of the cavity is arranged opposite to the cross-shaped groove at the bottom, the product is fixed in the clamping shaft, the clamping shaft is fixed in the cavity in the middle of the base, and the two ends of the clamping shaft can slide along the groove on the inner surface of the cavity, and the bottom of the base is fixed on the vibration test bench.

[0005] Furthermore, the clamping shaft includes a main body, a supporting end and a threaded pin. A groove for installing the product is provided in the middle of the main body. Two supporting ends and two threaded pins are provided. One end of the two supporting ends is integrally formed with the two ends of the main body respectively, and the other end is provided with an external thread. The two threaded pins are respectively sleeved on the external threads of the two supporting ends. The two ends of the clamping shaft are respectively fixed in cross-shaped grooves arranged opposite to each other on the inner surface of the cavity through the supporting ends and the threaded pins, and the clamping shaft can slide from the cross-shaped grooves at the left and right ends of the inner surface of the cavity to the cross-shaped grooves at the top and bottom ends through the two supporting ends to realize rapid conversion of the assessment direction.

[0006] Furthermore, the main body is composed of two cover plates with a concave middle portion. The concave structure in the middle of the two cover plates forms a groove, and the product is fixed in the groove. The shape and size of the groove match the shape and size of the product, and the two long side edges of the two cover plates of the main body are respectively provided with a row of threaded holes. Screws are passed through the threaded holes and tightened with nuts to connect the two cover plates to keep the product fixed and clamped.

[0007] Furthermore, the two cover plates of the main body have the same structural shape and size, and the inner recesses of the two cover plates are arranged opposite to each other.

[0008] Furthermore, each of the supporting ends is composed of two semicircular cylinders, one end of the two semicircular cylinders of the same supporting end is integrally formed with the same end of the two cover plates of the main body, and the two semicircular cylinders of the same supporting end form a cylinder, the cylinder is provided with an external thread, and the outer wall of the cylinder is also provided with threaded holes I and threaded holes II that are orthogonal to each other and of the same size.

[0009] Furthermore, the two semicircular cylinders at the support end have the same structural shape and size, and the planar ends of the two semicircular cylinders are arranged opposite to each other. At the same time, the directions of the planar ends of the two semicircular cylinders are respectively consistent with the directions of the concave notches in the middle of the two cover plates of the main body.

[0010] Furthermore, the threaded pin includes two flat plates and a round tube. The round tube is arranged between the two flat plates. The flat plates are force-bearing support surfaces. The round tube includes two layers, an inner ring and an outer ring. The inner ring and the outer ring can rotate independently of each other. The inner ring is provided with an internal thread matching the external thread on the support end. A threaded hole III of the same size as threaded hole I and threaded hole II is provided on the outer wall of the round tube. A screw is passed through threaded hole I and threaded hole III or through threaded hole II and threaded hole III to limit the axial rotation of the supporting end and the threaded pin. The threaded pin is connected to the external thread on the support end through the internal thread on the inner ring. The threaded pin is clamped in short grooves arranged opposite to each other on the inner surface of the cavity through two flat plates to fix the clamping shaft in the cavity.

[0011] Furthermore, the base is a regular cylinder, and the cavity is arranged at the center of the cylinder.

[0012] Furthermore, a plurality of threaded holes are provided at the bottom of the base, and screws are passed through the threaded holes and matched with nuts to fix the base on the vibration test table.

[0013] Furthermore, the cavity is a circular cavity, the groove on the inner surface of the cavity is a circular groove, the circular groove is located in the middle of the circular cavity, and the groove width is equal to the outer diameter of the support end.

[0014] In the present invention, the main body and the two supporting ends are an integrally formed structure, the supporting ends are cylindrical structures, the two cover plates of the main body are both rectangular structures, and the middle parts of the two cover plates are concave structures, which are grooves.

[0015] The vibration test fixture structure of the present invention is characterized in that: a cavity is excavated inside the base for product movement, and the base only needs to be installed once with the vibration table before the test. When the direction of the subsequent test changes, there is no need to reverse the direction of the vibration test table or perform secondary tooling on the base. A circular groove is designed on the surface of the base cavity, and the left end, right end, top and bottom intersect to form a cross-shaped groove. When the product needs to be assessed in multiple directions, only a movable clamping shaft is required, which is simple and convenient to operate. The clamping shaft is an independent movable part. When vibration tests need to be performed on different products, only the clamping shaft needs to be tooled.

[0016] The beneficial effects of the present invention are: 1) The structural design of the vibration test fixture can realize the rapid conversion of multi-directional vibration assessment requirements and is easy to use.

[0017] 2) The entire fixture structure is simple in design and is a regular geometric body, which is easy to process and manufacture.

[0018] 3) The installation and connection of the entire fixture are simple and easy to operate, including the installation of the base and the vibration table, the fixed connection between the clamping shaft and the product, and the fixed connection between the clamping shaft and the base, all of which are achieved through threaded connection with screws, nuts or threaded pins.

[0019] 4) The clamping shaft is designed as a movable part to avoid repeated tooling of the vibration table and the base, and the clamping shaft can be replaced for different product assessments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 An exploded view of the present invention; Figure 2 It is a partial schematic diagram of the cavity of the present invention; Figure 3 This is a schematic diagram of the structure of the main body and the support end of the present invention being integrally formed in half; Figure 4 It is a structural schematic diagram of the clamping shaft of the present invention; Figure 5 It is a structural schematic diagram of the support end of the present invention; Figure 6 It is a structural schematic diagram of the cross section of the main body of the present invention; Figure 7 It is a structural schematic diagram of the threaded pin of the present invention; Figure 8 It is a schematic diagram of the assessment of different directions of the present invention, wherein Figure a is a schematic diagram of the vertical and lateral vibrations of the present invention, and Figure b is a schematic diagram of the axial vibration of the present invention.

[0021] In the figure: 1 is a base, 2 is a cavity, 3 is a clamping shaft, 4 is a main body, 5 is a supporting end, 6 is a threaded pin, 7 is a groove, 8 is a short groove, 9 is a groove, 10 is a flat plate, 11 is a round tube, 12 is an inner ring, 13 is a threaded hole I, 14 is a threaded hole II, 15 is a threaded hole III, 16 is a cover plate, and 17 is a semicircular cylinder. DETAILED DESCRIPTION

[0022] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0023] In the description of the present application, it should be noted that the terms "center / portion", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "top", "bottom", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0024] In addition, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "provided with", "embedded", "clipped", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0025] It is also necessary to understand that the terms "include / comprise", "consist of..." or any other variation thereof are intended to cover non-exclusive inclusion, so that a product, device, process or method including a series of elements includes not only those elements, but also other elements not explicitly listed when necessary, or also includes elements inherent to such product, device, process or method. In the absence of further restrictions, the elements defined by the sentence "include / comprise...", "consist of..." do not exclude the presence of other identical elements in the product, device, process or method including the elements. Example

[0026] like Figures 1 to 8As shown, the present invention provides a vibration test fixture equipped with three-way quick conversion, including a base 1 and a clamping shaft 3, a cavity 2 is provided in the middle of the base 1, a groove 7 is provided along the middle of the inner surface of the cavity 2, a short groove 8 is respectively provided at the left end, the right end, the top and the bottom of the inner surface of the cavity 2, and the four short grooves 8 and the groove 7 are respectively intersected to form a cross-shaped groove, the cross-shaped groove at the left end of the inner surface of the cavity 2 is arranged opposite to the cross-shaped groove at the right end, the cross-shaped groove at the top of the inner surface of the cavity 2 is arranged opposite to the cross-shaped groove at the bottom, the product is fixed in the clamping shaft 3, the clamping shaft 3 is fixed in the cavity 2 in the middle of the base 1, and the two ends of the clamping shaft 3 can slide along the groove 7 on the inner surface of the cavity 2, and the bottom of the base 1 is fixed on the vibration test table.

[0027] Preferably, the clamping shaft 3 includes a main body 4, a supporting end 5 and a threaded pin 6. A groove 9 for installing the product is provided in the middle of the main body 4. Two supporting ends 5 and two threaded pins 6 are provided. One end of the two supporting ends 5 is integrally formed with the two ends of the main body 4 respectively, and the other end is provided with an external thread. The two threaded pins 6 are respectively sleeved on the external threads of the two supporting ends 5. The two ends of the clamping shaft 3 are respectively fixed in the cross-shaped grooves arranged opposite to each other on the inner surface of the cavity 2 through the supporting ends 5 and the threaded pins 6, and the clamping shaft 3 can slide from the cross-shaped grooves at the left and right ends of the inner surface of the cavity 2 to the cross-shaped grooves at the top and bottom ends through the two supporting ends 5 to realize rapid conversion of the assessment direction.

[0028] Preferably, the main body 4 is composed of two square cover plates 16 with a concave structure in the middle. The concave structure in the middle of the two square cover plates 16 forms a groove 9. The product is fixed in the groove 9. The shape and size of the groove 9 match the shape and size of the product. The two long side edges of the two cover plates 16 of the main body 4 are respectively provided with a row of threaded holes. Screws are passed through the row of threaded holes on the two long side edges of the two cover plates 16, and the two cover plates 16 are connected by tightening with nuts to keep the product fixed and clamped.

[0029] Preferably, the two cover plates 16 of the main body 4 have the same structure, shape and size, and the inner recesses of the two cover plates 16 are arranged opposite to each other.

[0030] Preferably, each of the support ends 5 is composed of two semicircular cylinders 17, one end of the two semicircular cylinders 17 of the same support end 5 is integrally formed with the same end of the two cover plates 16 of the main body 4, and the two semicircular cylinders 17 of the same support end 5 form a cylinder (the cylinder is the support end 5), the cylinder is provided with an external thread, and the outer wall of the cylinder is also provided with threaded holes Ⅰ13 and threaded holes Ⅱ14 that are orthogonal to each other and of the same size.

[0031] Preferably, the two semicircular cylinders 17 of the support end 5 have the same structural shape and size, and the planar ends of the two semicircular cylinders 17 are arranged opposite to each other. At the same time, the planar ends of the two semicircular cylinders 17 are oriented in the same direction as the notches of the concave structure in the middle of the two cover plates 16 of the main body 4. The planar ends of the two semicircular cylinders 17 are flush with the end surfaces of the two cover plates 16 with the concave structure ends. When the two cover plates 16 of the main body 4 are closed, the main body 4 is coaxial with the support ends 5 located at both ends of the main body 4.

[0032] Preferably, the threaded pin 6 includes two flat plates 10 and a round tube 11. The round tube 11 is arranged between the two flat plates 10. The flat plates 10 are force-bearing support surfaces. The round tube 11 includes two layers, an inner ring 12 and an outer ring. The outer ring is the inner wall of the round tube 11. The inner ring 12 and the outer ring can rotate independently of each other. The inner ring 12 is provided with an internal thread matching the external thread on the support end 5. A threaded hole III15 of the same size as the threaded hole I13 and the threaded hole II14 is provided on the outer wall of the round tube 11. The axial rotation of the support end 5 and the threaded pin 6 is limited by passing a screw through the threaded hole I13 and the threaded hole III15 or through the threaded hole II14 and the threaded hole III15. The threaded pin 6 is connected to the external thread on the support end 5 through the internal thread on the inner ring 12. The threaded pin 6 is clamped in the short grooves 8 arranged opposite to each other on the inner surface of the cavity 2 through the two flat plates 10 to fix the clamping shaft 3 in the cavity 2.

[0033] Preferably, the base 1 is a regular cylinder, and the cavity 2 is arranged at the center of the cylinder.

[0034] Preferably, the bottom of the base 1 is provided with a plurality of threaded holes, and the base 1 is fixed on the vibration test table by screws passing through the threaded holes at the bottom of the base 1 and cooperating with nuts.

[0035] Preferably, the cavity 2 is a circular cavity, the groove 7 on the inner surface of the cavity 2 is a circular groove, the circular groove is located in the middle of the circular cavity, and the width of the groove 7 is equal to the diameter of the supporting end 5.

[0036] In the present invention, the main body 4 and the two support ends 5 are an integrally formed structure, and the main body 4 and the support ends 5 are coaxially arranged, the main body 4 is divided into two parts from the middle to form two cover plates 16, and the support end 5 is divided into two parts from the middle to form two semicircular cylinders 17, and the support end 5 is a cylindrical structure with external threads thereon, and the two cover plates 16 of the main body 4 are both rectangular structures, and an inner concave structure is provided in the middle of the two cover plates 16, and the inner concave structure is a groove 9.

[0037] In the present invention, the total length of the threaded pin 6 is smaller than the total length of the supporting end 5 .

[0038] In the present invention, the threaded hole I 13, the threaded hole II 14 and the threaded hole III 15 are all through holes.

[0039] In the present invention, the vibration test fixture structure mainly includes a base 1, a cavity 2, and a clamping shaft 3. The base 1 is a regular cylinder with a cavity 2 in the center. The cavity 2 is a circular cavity for placing and installing the clamping shaft 3. The bottom surface of the base 1 is designed with a plurality of threaded holes, and screws and nuts are passed through the threaded holes on the bottom surface of the base 1 for fixed connection with the vibration test bench. A groove 7 is provided on the inner surface of the cavity 2. The groove 7 is a circular groove, which is the motion track of the clamping shaft 3. A short groove 8 is additionally designed at the left end, the right end, the top and the bottom of the inner surface of the cavity 2. The four short grooves 8 intersect with the circular grooves to form a cross-shaped groove, and the cross-shaped groove is used to realize the fixed installation of the clamping shaft 3. The clamping shaft 3 includes a main body 4, support ends 5 on both sides and two threaded pins 6. The main body 4 is composed of an upper and lower cover plate 16. The inside of the cover plate 16 is a groove 9 designed to fit the product shape. The two long side edges of the two cover plates 16 are respectively designed with a row of threaded holes. Screws are used to pass through the threaded holes on the two long side edges of the two cover plates 16. The two cover plates 16 are connected by tightening with nuts to keep the product fixed and clamped. There are two support ends 5, and each support end 5 is composed of two upper and lower semicircular cylinders 17. One end of the two support ends 5 is respectively integrally formed with the two ends of the main body 4, and the other end surface is processed with external threads, which cooperate with the special threaded pins 6 to realize the cross with the left end, right end, top and bottom of the inner surface of the cavity 2. shaped groove connection, the groove 9 on the main body 4 can accommodate different products, the size and shape of the groove 9 can be designed according to the appearance and size of different products, and fit the appearance of different products, the size of the cavity 2 can accommodate different clamping shafts 3, so as to realize the clamping and installation of different products by the clamp of the present invention, when the two supporting ends 5 of the clamping shaft 3 are placed on the cross-shaped grooves at the left and right ends of the inner surface of the cavity 2, the vibration test requirements between vertical and lateral directions can be converted by rotating 90 degrees with the axial center line of the clamping shaft 3 as the rotation axis, and the two supporting ends 5 of the clamping shaft 3 are slid from the cross-shaped grooves at the left and right ends of the inner surface of the cavity 2 to the cross-shaped grooves at the top and bottom ends to realize the vibration test requirements of converting vertical or lateral to axial.

[0040] The working principle of the present invention is as follows: the base 1 is placed on the vibration table, and screws and nuts are used to connect and fix the base 1 with the vibration table through the threaded holes designed at the bottom of the base 1. The two cover plates 16 of the main body 5 are placed separately, and the product is placed in the groove of one of the cover plates 16, and the other cover plate 16 is closed, so that the groove 9 is properly fitted with the product shape, and at the same time, a row of threaded holes on the long sides of the two cover plates 16 are aligned, and screws and nuts are used to pass through the threaded holes and tighten to fix and clamp the product, and the two threaded pins 6 are fixed by rotating the inner ring 12 of the round tube 11 of the threaded pin 6. Fully screw them into the two supporting ends 5 of the clamping shaft 3 respectively, move the clamping shaft 3 into the internal cavity 2 of the base 1, keep the two threaded pin 6 plates 10 parallel to the short groove 8, and at the same time rotate the inner ring 12 of the threaded pin 6 round tube 11 outward to embed the threaded pin 6 into the short groove 8, so that the supporting ends 5 on both sides can be placed in the cross-shaped groove, use screws and nuts to pass through the threaded holes III15 on the surface of the threaded pin 6 round tube 11 and the threaded holes I13 on the surfaces of the two supporting ends 5 of the clamping shaft 3 and tighten them, so as to achieve a fixed connection between the clamping shaft 3 and the base 1 and complete the vertical assessment. Keep the clamping shaft 3 in a horizontal state, and keep the two supporting ends 5 embedded in the short grooves 8 at the left and right ends. Remove the screws and nuts that pass through the threaded hole III15 on the surface of the round tube 11 of the threaded pin 6 and the threaded hole I13 on the surface of the two supporting ends 5 of the clamping shaft 3, so that the clamping shaft 3 is in a rotatable state. Rotate the clamping shaft 3 by a certain angle (90 degrees) with the axial center line of the clamping shaft 3 as the rotation axis, use the screws and nuts to pass through the threaded hole III15 on the surface of the round tube 11 of the threaded pin 6 and the threaded hole II14 on the surface of the two supporting ends 5 of the clamping shaft 3 and tighten them, so as to realize the assessment of vertical conversion to lateral conversion. When it is necessary to convert the assessment from vertical or lateral to axial direction, the use of a lifting device is required to remove the screws and nuts on the threaded holes III15 passing through the surface of the round tube of the threaded pin 6 and the threaded holes I13 or the threaded holes II14 on the surfaces of the two support ends 5 of the clamping shaft 3, and the inner ring 12 of the round tube 11 of the threaded pin 6 is rotated to make the two threaded pins 6 disengage from the short groove 8, so that the clamping shaft 3 is in a rotatable state, and the support ends 5 on both sides are moved along the circular groove to the top and bottom of the cross-shaped groove, so that the clamping shaft 3 is in a vertical state, and the inner ring 12 of the round tube 11 of the threaded pin 6 is rotated outward to make the threaded pin 6 embedded in the short groove 8 at the top and bottom, so that the support ends 5 on both sides can be placed in the cross-shaped groove, and the screws and nuts are passed through the threaded holes III15 on the surface of the round tube 11 of the threaded pin 6 and the threaded holes I13 or the threaded holes II14 on the surfaces of the two support ends 5 of the clamping shaft 3 and tightened to achieve a fixed connection between the clamping shaft 3 and the base 1, and complete the assessment in the axial direction.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

[0042] In addition, those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and to form different embodiments. For example, in the above claims, any one of the claimed embodiments may be used in any combination. The information disclosed in this background technology section is intended only to deepen the understanding of the overall background technology of the present invention and should not be regarded as an admission or in any form of implication that the information constitutes prior art known to those skilled in the art.

Claims

1. A vibration test fixture equipped with three-way rapid conversion, characterized in that: It includes a base and a clamping shaft, a cavity is provided in the middle of the base, a groove is provided along the middle of the inner surface of the cavity, a short groove is provided at the left end, right end, top and bottom of the inner surface of the cavity respectively, and the short groove and the groove intersect to form a cross-shaped groove, the cross-shaped groove at the left end of the inner surface of the cavity is opposite to the cross-shaped groove at the right end, the cross-shaped groove at the top of the inner surface of the cavity is opposite to the cross-shaped groove at the bottom, the product is fixed in the clamping shaft, the clamping shaft is fixed in the cavity in the middle of the base, and the two ends of the clamping shaft can slide along the groove on the inner surface of the cavity, and the bottom of the base is fixed on the vibration test bench.

2. The vibration test fixture equipped with three-way rapid conversion according to claim 1, characterized in that: The clamping shaft includes a main body, a supporting end and a threaded pin. A groove for installing the product is provided in the middle of the main body. Two supporting ends and two threaded pins are provided. One end of the two supporting ends is integrally formed with the two ends of the main body respectively, and the other end is provided with an external thread. The two threaded pins are respectively sleeved on the external threads of the two supporting ends. The two ends of the clamping shaft are respectively fixed in oppositely arranged cross-shaped grooves on the inner surface of the cavity through the supporting ends and the threaded pins, and the clamping shaft can slide from the cross-shaped grooves at the left and right ends of the inner surface of the cavity to the cross-shaped grooves at the top and bottom ends through the two supporting ends to realize rapid conversion of the assessment direction.

3. The vibration test fixture equipped with three-way rapid conversion according to claim 2, characterized in that: The main body is composed of two cover plates with a concave middle part. The concave structure in the middle of the two cover plates forms a groove. The product is fixed in the groove. The shape and size of the groove match the shape and size of the product. A row of threaded holes are respectively provided on the two long side edges of the two cover plates of the main body. Screws are passed through the threaded holes and tightened with nuts to connect the two cover plates to keep the product fixed and clamped.

4. The vibration test fixture equipped with three-way rapid conversion according to claim 3, characterized in that: The two cover plates of the main body have the same structural shape and size, and the inner recesses of the two cover plates are arranged opposite to each other.

5. The vibration test fixture equipped with three-way rapid conversion according to claim 3, characterized in that: Each of the support ends is composed of two semicircular cylinders, one end of the two semicircular cylinders of the same support end is integrally formed with the same end of the two cover plates of the main body, and the two semicircular cylinders of the same support end form a cylinder, which is provided with an external thread, and the outer wall of the cylinder is also provided with threaded holes I and II that are orthogonal to each other and of the same size.

6. The vibration test fixture equipped with three-way rapid conversion according to claim 5, characterized in that: The two semicircular cylinders at the support end have the same structural shape and size, and the planar ends of the two semicircular cylinders are arranged opposite to each other. At the same time, the directions of the planar ends of the two semicircular cylinders are respectively consistent with the directions of the inner concave notches in the middle of the two cover plates of the main body.

7. The vibration test fixture equipped with three-way rapid conversion according to claim 5, characterized in that: The threaded pin includes two flat plates and a round tube. The round tube is arranged between the two flat plates. The round tube includes two layers, an inner ring and an outer ring. The inner ring and the outer ring can rotate independently of each other. The inner ring is provided with an internal thread matching the external thread on the supporting end. A threaded hole III with the same size as threaded hole I and threaded hole II is provided on the outer wall of the round tube. A screw is passed through threaded hole I and threaded hole III or through threaded hole II and threaded hole III to limit the axial rotation of the supporting end and the threaded pin. The threaded pin is connected to the external thread on the supporting end through the internal thread on the inner ring. The threaded pin is clamped in short grooves arranged opposite to each other on the inner surface of the cavity through two flat plates to fix the clamping shaft in the cavity.

8. The vibration test fixture equipped with three-way rapid conversion according to claim 1, characterized in that: The base is a regular column, and the cavity is arranged at the center of the column.

9. The vibration test fixture equipped with three-way rapid conversion according to claim 1, characterized in that: The bottom of the base is provided with a plurality of threaded holes, and the base is fixed on the vibration test table by screws passing through the threaded holes and cooperating with nuts.

10. The vibration test fixture equipped with three-way rapid conversion according to claim 2, characterized in that: The cavity is a circular cavity, the groove on the inner surface of the cavity is a circular groove, the circular groove is located in the middle of the circular cavity, and the groove width is equal to the outer diameter of the supporting end.

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