A device for rapidly switching the direction of a test specimen test

Abstract

This invention discloses a device for rapidly changing the test direction of a specimen, belonging to the technical field of centrifugal constant acceleration testing devices. It solves the problems of high cost, low efficiency, and complex operation in existing centrifugal constant acceleration tests. The device for rapidly changing the test direction of a specimen provided by this invention includes a fixed base and a movable platform. The fixed base has a square boss, and the square boss has an inverted first T-shaped groove in the shape of a cross along its thickness direction. The movable platform includes a cuboid platform body, with insert plates at both ends along the long side of the platform body. The two insert plates and the platform body combine to form two first T-shaped pins. The two first T-shaped pins can be inserted into the first T-shaped grooves. This invention can rapidly change the test direction by changing the combined orientation of the movable platform, the fixed base, and the safety pins, thereby reducing testing costs and improving work efficiency.

Description

Technical Field

[0001] This invention relates to the field of centrifugal testing equipment, and more particularly to a device for rapidly changing the testing direction of specimens. Background Technology

[0002] Centrifugal constant acceleration systems are currently a crucial testing method used by research institutes to determine whether electronic products, components, equipment, and structures can achieve the expected results when subjected to constant acceleration (steady-state acceleration) environments. The testing process begins by determining the test orientation of the specimen. The specimen is tested along three orthogonal axes, with two positive and two negative directions per axis, for a total of six directions. When installing the specimen, it and the fixture are first weighed. Then, the fixture is installed on one of the cantilevered horizontal platforms of the centrifugal constant acceleration testing system, and the specimen is then mounted onto the fixture. A counterweight of the same mass is then installed on the other cantilevered horizontal platform of the same centrifugal constant acceleration testing system. When changing orientations, the specimen and fixture must be disassembled sequentially, the test orientation readjusted, and then reassembled. Of the three orientations, two are necessarily vertical tests. Vertical tests require the prior design of vertical fixtures or plates, which raises issues related to design cycle, processing cycle, and processing costs. For vertical testing, the test piece and fixtures must first be removed. Then, the vertical plate or independent vertical fixture is weighed and installed on the cantilever platform of the centrifugal constant acceleration testing system. Subsequently, the horizontal fixture and test piece are sequentially installed on the vertical plate, or the test piece is directly installed on the independent vertical fixture. The addition of the vertical plate or fixture inevitably alters the mass of the test specimen. Therefore, the counterweight at the other end of the cantilever of the centrifugal constant acceleration testing system needs to be adjusted to ensure dynamic balance during centrifuge rotation.

[0003] Overall, the main reason why centrifugal constant acceleration testing systems are cumbersome to operate, inefficient, and costly is due to the specific requirements of their testing. Furthermore, the installation of centrifugal constant acceleration testing systems typically involves high working heights and limited operating space, and the frequent and intense work increases the risk of personnel and test specimens falling. Summary of the Invention

[0004] Based on the above analysis, the present invention aims to provide a device for rapidly changing the test direction of a specimen, in order to solve the problems of high cost, low efficiency and complex operation of the existing centrifugal constant acceleration test system.

[0005] The objective of this invention is mainly achieved through the following technical solutions:

[0006] The present invention provides a device for quickly changing the test direction of a specimen, including a fixed base and a movable platform; the fixed base is provided with a square boss, and the square boss is provided with an inverted first T-shaped groove in the shape of a cross along the thickness direction;

[0007] The movable tabletop includes a rectangular tabletop body, with insert plates at both ends along the long side of the tabletop body. The two insert plates and the tabletop body together form two first T-shaped pins; the two first T-shaped pins can be inserted into the first T-shaped slots.

[0008] In one possible design, the length of the square boss is equal to its width and both are greater than its thickness; a first groove is provided around the square boss near the top surface of the fixed base.

[0009] In one possible design, the insert plate of the movable tabletop has two rows of protrusions on the side near the main body of the tabletop. The two rows of protrusions are arranged along the length of the insert plate and are adjacent to the long side of the insert plate. When the movable tabletop is installed horizontally, the protrusions can be embedded in the corresponding first groove.

[0010] In one possible design, the main body of the platform is provided with a second T-pin, which is located on the opposite side of the test piece; when the movable platform is installed horizontally, the second T-pin can be inserted into the first T-slot.

[0011] In one possible design, the fixing base is a square base, the length of which is equal to the width and both are greater than its thickness; the square boss of the fixing base is provided with multiple base locking holes, which penetrate through the square boss.

[0012] In one possible design, the main body of the tabletop has multiple tabletop locking holes, and the number of base locking holes is equal to the number of tabletop locking holes and their positions correspond. When the movable tabletop is installed horizontally, bolts are used to pass through the base locking holes and the tabletop locking holes.

[0013] In one possible design, the first T-slot has two spaced-apart vertical locking holes; the vertical locking holes penetrate the fixing base.

[0014] In one possible design, a second groove is provided on two sides along the long side of the tabletop body. The length of the second groove is equal to the distance between the two vertical locking holes. On both sides of the second groove, there are upright protrusions. When the movable tabletop is installed vertically, the upright protrusions can be embedded in the corresponding vertical locking holes.

[0015] In one possible design, both ends of the first T-slot are provided with U-shaped grooves, which penetrate the fixed base; when the movable platform is installed vertically, the end of the insert plate can be embedded in the corresponding U-shaped groove.

[0016] In one possible design, both the first T-pin and the second T-pin include a horizontal portion and a vertical portion, with the length of the horizontal portion of the first T-pin being greater than the length of the horizontal portion of the second T-pin.

[0017] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0018] (1) In all directional tests, the overall test mass remains unchanged (the overall mass of the fixed base and the movable platform does not change), eliminating the need to readjust the counterweight due to the addition of a vertical plate or the replacement of the vertical fixture. The movable platform on the fixed base allows for adjustments in twelve test directions, providing the most favorable conditions for the installation of the test specimens for centrifugal constant acceleration tests, and saving time, money, and manpower costs, thus improving work efficiency.

[0019] (2) The present invention provides a groove around the square boss and a protruding ridge on the main body of the table. When the movable table is installed horizontally, the protruding ridge can be embedded in the corresponding first groove. The interlocking of the two increases the firmness of the movable table.

[0020] (3) The present invention provides two mutually perpendicular inverted first T-slots, which provide a basis for the direction conversion of the movable table. The movable table can be embedded in any one of the inverted first T-slots, thereby realizing the direction conversion of the movable table. Since the position of the test piece on the movable table is fixed, when the direction of the movable table is converted, it will carry the test piece to convert to different directions synchronously, so that the test piece can meet the centrifugal constant acceleration test in different directions.

[0021] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained through the embodiments described and the accompanying drawings, which are particularly pointed out. Attached Figure Description

[0022] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0023] Figure 1 This is a schematic diagram of the structure of the fixing base of the present invention;

[0024] Figure 2 This is a partial structural diagram of the fixed base;

[0025] Figure 3 This is a left view of the fixing base of the present invention;

[0026] Figure 4 This is the left view of the movable platform;

[0027] Figure 5A schematic diagram of a horizontally installed movable platform;

[0028] Figure 6 A schematic diagram of a vertically installed movable platform;

[0029] Figure 7 A schematic diagram of the bottom surface of the fixing base when the movable tabletop is installed vertically;

[0030] Figure 8 This is a structural diagram of the horizontal part of the second T-pin.

[0031] Figure label:

[0032] 1-Fixed base; 2-Square boss; 3-First T-slot; 4-Base locking hole; 5-Vertical locking hole; 6-First groove; 7-Insertion plate locking hole; 8-Vertical limiting baffle; 9-Movable tabletop; 10-Tabletop body; 11-First T-pin; 12-Second T-pin; 13-Tabletop locking hole; 14-Upright plate protrusion; 15-Protruding ridge; 16-Vertical mounting locking hole; 17-Third groove; 18-U-shaped groove; 19-Second groove; 20-Fourth groove. Detailed Implementation

[0033] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0034] This invention provides a device for rapidly changing the test direction of a specimen, which is mounted on the cantilever of a centrifugal constant acceleration test system. The device includes a fixed base 1 and a movable platform 9. The fixed base 1 has a square boss, and the square boss has an inverted first T-shaped groove 3 in a cross shape along its thickness direction. The movable platform 9 includes a cuboid platform body 10, with insert plates at both ends along the long side of the platform body 10. The two insert plates and the platform body 10 combine to form two first T-shaped pins 11; the two first T-shaped pins 11 can be inserted into the first T-shaped grooves.

[0035] Specifically, such as Figures 1 to 3As shown, the device for rapidly changing the test direction of a test specimen according to the present invention includes a fixed base 1 and a movable platform 9. The fixed base 1 is cuboid in shape. A square boss is provided on the cuboid fixed base 1, and an inverted cross-shaped first T-slot 3 is provided on the square boss. The length direction of the bottom of the two inverted first T-slots 3 is parallel to the four sides of the corresponding square boss. Furthermore, the two inverted first T-slots 3 intersect and are perpendicular to each other, forming an inverted cross-shaped first T-slot 36. The fixed base 1 is mounted on a cantilever, and three sides of the fixed base 1 are parallel to the corresponding sides of the cantilever. The movable platform 9 is mounted on the fixed base 1, and the test specimen is fixed to the platform body 10 of the movable platform 9 by a clamp.

[0036] When performing a centrifugal constant acceleration test, any of the first T-pins 11 on the movable platform 9 is inserted into one of the first T-slots 3, thereby realizing the orientation change of the movable platform 9. Since the position of the test piece on the movable platform 9 is fixed, when the orientation of the movable platform 9 is changed, it will carry the test piece to synchronously change to different orientations, so that the test piece can meet the centrifugal constant acceleration test in different orientations.

[0037] It should be noted that when conducting centrifugal constant acceleration tests, the test orientation of the test specimen must be determined first. The test specimen is divided into three orthogonal axes (XC, YC, and ZC), each axis including two positive and two negative directions, for a total of six test orientations. In this invention, the origin is the intersection of two adjacent sides of the base surface of the fixed base, the directions of the two adjacent sides are defined as the XC and YC directions respectively, and the height direction of the boss is defined as the ZC direction to establish a coordinate system.

[0038] The process of adjusting the test orientation of the test piece in this invention is as follows: when the movable platform 9 is installed vertically, such as... Figure 6 As shown, by inserting one of the first T-pins 11 into the first T-groove 3 of the fixed base 1, the movable platform 9 can be rotated clockwise by 90°, 180° and 270° to adjust the installation direction; then, by inserting the other first T-pin 11 into the first T-groove 3 of the fixed base 1, the movable platform 9 can also be rotated clockwise by 90°, 180° and 270° to adjust the installation direction, thereby causing the movable platform 9 to drive the test piece to adjust the test direction.

[0039] In existing technologies, when conducting centrifugal constant acceleration tests, a single installation can only achieve constant acceleration in one direction. Changing the direction requires reassembling and disassembling the test piece and fixture. Vertical tests also require the installation of a dedicated vertical plate or fixture, the design and production of which increase the test preparation cycle and cost. Furthermore, changing the vertical plate or fixture necessitates readjusting the corresponding counterweights to ensure the accuracy and safety of the test.

[0040] Compared with existing technologies, this invention utilizes the movable platform 9 to switch different directions and angles on the fixed base 1, thereby enabling the centrifugal constant acceleration system to quickly change direction during test orientation changes. Operationally, this avoids frequent disassembly and assembly of the test specimen and fixtures, reducing the test risks caused by increased test specimen assembly frequency. When the test specimen is subjected to vertical testing, this invention eliminates the need for designing vertical plates or fixtures, saving time, simplifying procedures, and reducing the design, production cycle, and processing costs associated with vertical plates and fixtures. Furthermore, the overall test mass remains constant throughout all test orientations (the overall mass of the fixed base 1 and the movable platform 9 does not change), eliminating the need to readjust the counterweight due to adding vertical plates or replacing vertical fixtures. The movable platform 9 on the fixed base 1 allows for twelve test orientation adjustments, providing optimal conditions for test setup during centrifugal constant acceleration testing. In summary, this invention saves time, capital, and labor costs, and improves work efficiency.

[0041] In order to better fix the fixed base 1 to the cantilever, multiple fixed base and cantilever connection holes are reserved on the fixed base 1, such as eight fixed base and cantilever connection holes. The eight fixed base and cantilever connection holes are arranged in two parallel groups on both sides of the fixed base 1. The fixed base 1 is fixed to the cantilever of the centrifugal constant acceleration test system through the eight fixed base and cantilever connection holes.

[0042] When the movable platform 9 is fixed to the fixed base 1 in a horizontal manner, such as Figure 1 and Figure 5 As shown, to increase the sturdiness of the movable platform 9, the length of the square boss of the present invention is equal to its width and both are greater than its thickness; a first groove 6 is provided around the square boss near the top surface of the fixed base 1. In addition, two rows of protruding ribs are provided on the side of the insert plate of the movable platform 9 near the main body 10 of the platform. The two rows of protruding ribs are arranged along the length direction of the insert plate and are adjacent to the long side of the insert plate; when the movable platform 9 is installed horizontally, the protruding ribs can be embedded in the corresponding first groove 6.

[0043] Compared with the prior art, the present invention provides a groove around the square boss and a protruding ridge 15 on the table body 10. When the movable table 9 is installed horizontally, the protruding ridge can be embedded into the corresponding first groove 6, and the interlocking of the two increases the firmness of the movable table 9.

[0044] To securely fix the test specimen to the movable tabletop 9, the clamp of this invention is a cuboid plate with mounting holes for fixing the test specimen. The test specimen is fixed to the clamp through the mounting holes. Additionally, the tabletop body 10 has movable panel mounting holes, and the clamp has corresponding slots. The opposite side of the clamp's test specimen fixing surface is aligned with and fits against the tabletop body 10. After the slots of the clamp are aligned with the movable panel mounting holes, they are connected by bolts, thereby fixing the clamp to the movable tabletop 9.

[0045] It should be noted that the height of the first groove in this invention is equal to 1 / 2 of the height of the square boss. The first groove of this invention wraps around the square boss, and the height of the first groove is set to 1 / 2 of the height of the square boss, which can improve the load-bearing effect of the square boss on the movable table.

[0046] When the test piece needs to be tested vertically, insert either of the two first T-pins 11 into either of the first T-slots from one side of the square boss of the fixed base 1. When the vertical test direction needs to be adjusted, pull the first T-pin 11 out of the first T-slot and rotate the movable table 9 clockwise by 90°, 80° and 70° respectively to adjust the test piece installation direction. Similarly, when the vertical test direction needs to be adjusted again, pull the first T-pin 11 out of the first T-slot and replace it with another T-pin, and rotate the movable table 9 clockwise by 0°, 0° and 70° respectively to adjust the test piece installation direction.

[0047] In existing technologies, when the installation direction of the test piece needs to be changed to adjust the test direction, the test piece and fixture need to be disassembled sequentially, the test direction readjusted, and then the test piece and fixture reinstalled sequentially. Furthermore, when conducting vertical tests, the vertical fixture or plate needs to be designed first, resulting in issues related to design cycle, processing cycle, and processing cost. Conducting vertical tests requires first removing the test piece and fixture, then weighing the vertical plate or independent vertical fixture, and then installing it on the cantilever platform of the centrifugal constant acceleration testing system. Subsequently, the horizontal fixture and test piece are sequentially installed on the vertical plate, or the test piece is directly installed on the independent vertical fixture. Because the addition of the vertical plate or fixture inevitably causes changes in the mass of the test specimen, the counterweight of the other end of the centrifugal constant acceleration testing system (cantilever 1) also needs to be adjusted to ensure dynamic balance during the centrifuge rotation process.

[0048] Compared with the prior art, the present invention does not require the design of existing upright plates and vertical fixtures when adjusting the test direction of the test specimen. The present invention first fixes the test specimen on the movable table 9, and adjusts the test direction of the test specimen by changing the direction of the movable table 9.

[0049] In order to allow the movable platform 9 to be installed horizontally on the fixed base 1, such as Figure 4 As shown, the main body 10 of the table of the present invention is provided with a second T-shaped pin 12, and the second T-shaped pin 12 and the test piece are located on opposite sides of each other; when the movable table 9 is installed horizontally, the second T-shaped pin 12 can be inserted into the first T-shaped groove 3.

[0050] Specifically, a second T-shaped pin 12 is provided on the main body 10 of the platform, and the second T-shaped pin 12 is located on the opposite side of the test piece; the second T-shaped pin 12 can be inserted into any one of the first T-shaped slots. Both the first T-shaped pin 11 and the second T-shaped pin 12 include a horizontal part and a vertical part; the second T-shaped pin 12 is located on the central axis of the main body 10 of the platform, which is parallel to the two insert plates, and the angle between the second T-shaped pin 12 and the first T-shaped pins 11 on both sides differs by 90°.

[0051] It should be emphasized that the length of the lateral portion of the two first pins is greater than the length of the lateral portion of the second pin.

[0052] To further improve the reliability of the movable tabletop 9, the fixed base 1 of the present invention is a square base, the length of the fixed base 1 is equal to the width and both are greater than its thickness; the fixed base 1 is provided with a plurality of base locking holes 4; at the same time, the tabletop body 10 is provided with a plurality of tabletop locking holes 13, the number of base locking holes 4 and tabletop locking holes 13 are equal and their positions correspond. When the movable tabletop 9 is installed horizontally, bolts are used to pass through the base locking holes 4 and the tabletop locking holes 13.

[0053] Specifically, such as Figure 1 As shown, the fixing base 1 of the present invention is a square base, and a square boss is provided on the square boss. Multiple base locking holes 4 are provided on the square boss, for example, four base locking holes 4 are provided, and the four base locking holes 4 are distributed in a square shape on the square boss; in addition, as... Figure 5 As shown, a plurality of tabletop locking holes 13 are provided on the tabletop body 10. The positions of the tabletop locking holes 13 correspond to the positions of the base locking holes 4 and the number of locking holes is equal.

[0054] Compared with the prior art, the present invention, by setting the base locking hole 4 and the platform locking hole 13, and by using bolts to pass through the base locking hole 4 and the platform locking hole 13, can firmly fix the movable platform 9 to the fixed base 1, thereby avoiding the misalignment and sliding of the test piece during the centrifugal constant acceleration test, thus avoiding affecting the test results.

[0055] It should be noted that the aforementioned tabletop locking hole 13 is a countersunk hole.

[0056] In order to ensure that the movable tabletop 9 can be smoothly installed on the fixed base 1, such as Figure 7As shown, the first T-groove 3 of the present invention is provided with two spaced vertical locking holes 5; the vertical locking holes 5 penetrate the fixed base 1. The two sides along the long side of the table body 10 are provided with second grooves 19, the length of the second grooves 19 is equal to the interval between the two vertical locking holes 5; the two sides of the second grooves 19 are respectively provided with upright plate protrusions 14, and when the movable table 9 is installed vertically, the upright plate protrusions 14 can be embedded in the corresponding vertical locking holes 5.

[0057] Specifically, as shown in the figure, rectangular vertical locking holes 5 are provided in the two inverted first T-shaped grooves 3, and the vertical locking holes 5 penetrate the fixed base. Correspondingly, a second groove 19 is provided on the main body of the table 10. The second groove 19 is located on the two sides along the long side of the main body of the table 10. The length of the groove is equal to the distance between the two vertical locking holes 5 in the same first T-shaped groove 3. On both sides of the second groove 19, there are upright plate protrusions 14. The upright plate protrusions 14 are also rectangular plates. The upright plate protrusions 14 can be inserted into the corresponding vertical locking holes 5 to firmly lock the movable table 9 on the fixed base 1. When placed for centrifugal constant acceleration test, the movable panel causes the test piece to shake or be displaced.

[0058] Compared with the prior art, the present invention improves the stability of the movable table 9 by providing a vertical locking hole 5 on the fixed base 1 and a vertical plate protrusion 14 on the movable table 9, thereby fixing the vertically installed movable table 9 to the fixed base 1.

[0059] To further improve the stability of the movable tabletop 9 on the fixed base 1, both ends of the first T-shaped groove 3 of the present invention are provided with U-shaped grooves, which penetrate the fixed base 1; when the movable tabletop 9 is installed vertically, the end of the insert plate can be embedded in the corresponding U-shaped groove 18.

[0060] The present invention provides a vertical limiting baffle 8 at one end of each of the two cross-shaped first T-grooves 3. When the first T-pin 11 or the second T-pin 12 is inserted into the first T-grooves 3, it is inserted from the side of the first T-grooves 3 where the vertical limiting baffle 8 is not provided. The insertion of the first T-pin 11 or the second T-pin 12 is stopped after the first T-pin 11 or the second T-pin 12 abuts against the vertical limiting baffle 8.

[0061] Compared with the prior art, the present invention, by setting a vertical limiting baffle 8, can restrict the first T-shaped pin 11 or the second T-shaped pin 12 of the movable platform 9 within the first T-shaped groove 3 of the fixed base 1, thus preventing the movable platform 9 from sliding off the fixed base 1 when a centrifugal constant acceleration test is performed.

[0062] It should be emphasized that the length of the lateral portion of the second T-pin 12 of the present invention is less than the length and width of the square boss 2. Additionally, as... Figure 8 As shown, the second T-pin 12 has a fourth groove 20 on both sides of the two ends of the horizontal part. The purpose of setting the fourth groove 20 is to match the shape of the vertical limiting baffle 8 on the fixed base 1.

[0063] It should be noted that the fixed base 1 of the present invention is installed on the cantilever end face of the centrifuge. Of the two sets of vertical constraint baffles 8, one set is oriented away from the center of the centrifugal motion and aligned with the direction of the centrifugal force. The other set of vertical constraint baffles 8 should be aligned with the direction of the centrifuge's circumferential motion.

[0064] It should be noted that the ratio of the width of the horizontal portion to the width of the vertical portion of the first T-slot 3, the first T-pin 11, and the second T-pin 12 is 3:1.

[0065] Compared with the existing technology, the present invention controls the width of the horizontal portion of the first T-slot 3, the width of the vertical portion of the first T-pin 11 and the second T-pin 12 to be 3:1, which can ensure a tight engagement between the movable table 9 and the fixed base 1 and improve the firmness of the connection between the two.

[0066] To further improve the reliability of the movable platform 9 installation, a third groove 17 is provided on both sides of the two ends of the first T-slots 3 on the square boss. The third groove 17 penetrates the square boss. When the movable platform 9 is installed vertically, the two protruding ridges 15 on the insert plate can be embedded in the third groove 17, thereby fixing the movable platform 9.

[0067] In addition, such as Figure 6 As shown, a plate locking hole 7 is provided in the third groove 17 along the horizontal direction, and a vertical mounting locking hole 16 is provided near both ends along the length of the plate. When the movable platform 9 is installed vertically, the plate locking hole 7 on the square boss corresponds to the vertical mounting locking hole 16 on the movable platform 9. The fixed base 1 and the movable platform 9 are fixed together by inserting bolts into the plate locking hole 7 and the vertical mounting locking hole 16.

[0068] The specific process of adjusting the test orientation of the test piece using the present invention is as follows: When the test piece is subjected to a horizontal test, the movable platform 9 is inserted horizontally into any one of the first T-slots on the fixed base 1. With the front body in horizontal installation, the movable platform 9 can be rotated clockwise by 90°, 180°, and 270° to adjust the test piece installation orientation, achieving four possible combinations in two directions. When the movable platform 9 is inserted vertically into the first T-slot 3 on the fixed base 1, with the front body in vertical installation, two different surfaces of the movable platform 98 can be rotated clockwise by 90°, 180°, and 270° respectively to adjust the test piece installation orientation, achieving eight possible combinations in four directions.

[0069] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for rapidly changing the test direction of a specimen, capable of adjusting twelve test orientations, characterized in that, It includes a fixed base and a movable platform; the fixed base is provided with a square boss, and the square boss is provided with an inverted first T-shaped groove in the shape of a cross along the thickness direction; The movable tabletop includes a rectangular tabletop body, with insert plates at both ends along the long side of the tabletop body. The two insert plates and the tabletop body together form two first T-shaped pins; the two first T-shaped pins can be inserted into the first T-shaped slots. The device for rapidly changing the test direction of the specimen is located on the cantilever of the centrifugal constant acceleration test system; The main body of the platform is provided with a second T-shaped pin, and the second T-shaped pin and the test piece are located on opposite sides of each other; when the movable platform is installed horizontally, the second T-shaped pin can be inserted into the first T-shaped groove. A first groove is provided around the square boss near the top surface of the fixed base; two rows of protrusions are provided on the side of the insert plate of the movable platform near the main body of the platform, the two rows of protrusions are arranged along the length direction of the insert plate and adjacent to the long side of the insert plate; when the movable platform is installed horizontally, the protrusions can be embedded in the corresponding first groove. The first T-slot has two spaced vertical locking holes; the vertical locking holes penetrate the fixed base; the two sides along the long side of the table body have a second groove, the length of which is equal to the distance between the two vertical locking holes; the two sides of the second groove have a vertical plate protrusion, and when the movable table is installed vertically, the vertical plate protrusion can be embedded in the corresponding vertical locking hole. Both ends of the first T-slot are provided with U-shaped grooves, which penetrate the fixed base; when the movable platform is installed vertically, the end of the insert plate can be embedded in the corresponding U-shaped groove. The process of adjusting the test orientation of the specimen is as follows: When the specimen is subjected to a horizontal test, the movable platform is inserted into any one of the first T-slots on the fixed base in a horizontal position. With the front body in horizontal installation, the movable platform can be rotated clockwise by 90°, 180°, and 270° to adjust the reverse orientation of the specimen installation, achieving four possible combinations in two directions. When the movable platform is inserted into the first T-slot on the fixed base in a vertical position, with the front body in vertical installation, two different surfaces of the movable platform can be rotated clockwise by 90°, 180°, and 270° respectively to adjust the reverse orientation of the specimen installation, achieving eight possible combinations in four directions.

2. The device for rapidly changing the test direction of a specimen, capable of adjusting twelve test orientations, as described in claim 1, is characterized in that... The length of the square boss is equal to its width and both are greater than its thickness.

3. The device for rapidly changing the test direction of a specimen, capable of adjusting twelve test orientations, as described in claim 2, is characterized in that... The length of the fixed base is equal to its width and both are greater than its thickness; the square boss of the fixed base is provided with a plurality of base locking holes, which penetrate the square boss.

4. The device for rapidly changing the test direction of a specimen, capable of adjusting twelve test orientations, as described in claim 3, is characterized in that... The main body of the tabletop is provided with multiple tabletop locking holes. The number of base locking holes and the tabletop locking holes are equal and their positions correspond. When the movable tabletop is installed horizontally, bolts are used to pass through the base locking holes and the tabletop locking holes.

5. The device for rapidly changing the test direction of a specimen, capable of adjusting twelve test orientations, as described in claim 4, is characterized in that... Both the first T-pin and the second T-pin include a horizontal portion and a vertical portion, and the length of the horizontal portion of the first T-pin is greater than the length of the horizontal portion of the second T-pin.

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