Viscoelastic material testing clamp and viscous-elastic material testing device

Abstract

The utility model provides a viscous-elastic material testing clamp and a viscous-elastic material testing device.The viscous-elastic material testing clamp comprises a clamp body and a first limiting structure, the clamp body is provided with a first limiting groove, and the depth direction parallel to the first limiting groove serves as the first direction, and the depth direction parallel to the first limiting groove serves as the second direction perpendicular to the first direction; at least one side of the side wall, forming the first limiting groove, of the clamp body communicates with the outside to form a first installation opening, and the first limiting groove is at least a semi-closed groove. The first limiting structure detachably blocks the first mounting opening; when the clamp main body is subjected to a force parallel to the first direction, the clamp main body forming the inner wall of the first limiting groove abuts against the viscous-elastic material test piece in the force application direction. Compared with the prior art, the viscous-elastic material test piece is stably limited through the first limiting groove formed in the clamp body, and flexible disassembly and assembly of the viscous-elastic material test piece can be achieved through the detachable first limiting structure.

Description

Technical Field

[0001] The present application relates to the technical field of material testing, and in particular to a viscoelastic material testing fixture and a viscoelastic material testing device. Background Art

[0002] When testing the mechanical properties of viscoelastic material specimens, the specimen and the test fixture must be tightly fixed so that the force applied to the specimen is aligned with the tensile direction to ensure accurate test results. Currently, the most common method of fixing the specimen is gluing, where adhesive is applied between the specimen and the test fixture to secure them relative to each other.

[0003] However, gluing can introduce errors due to manual operation, potentially leading to specimen slippage during testing due to insufficient adhesion. During the test, the specimen surface generates heat due to the stress, which can easily melt the adhesive, causing the specimen to loosen and slip, seriously affecting the accuracy of the test data. Furthermore, gluing makes specimen replacement very inconvenient, significantly increasing time costs. Utility Model Content

[0004] The present application mainly provides a viscoelastic material testing fixture and a viscoelastic material testing device, which can stably fix the viscoelastic material specimen while realizing convenient disassembly and assembly of the viscoelastic material specimen.

[0005] In order to solve the above technical problems, a technical solution adopted in the present application is: to provide a viscoelastic material testing fixture, including a fixture main body and a first limiting structure, the fixture main body is provided with a first limiting groove, with the depth direction parallel to the first limiting groove as the first direction, and in the second direction perpendicular to the first direction, the side wall of the first limiting groove formed by the fixture main body is connected to the outside world on at least one side to form a first installation opening, so that the first limiting groove is at least a semi-closed groove; the first limiting structure can detachably block the first installation opening; wherein, when the fixture main body is subjected to a force parallel to the first direction, the fixture main body forming the inner wall of the first limiting groove presses against the viscoelastic material specimen along the direction of force application.

[0006] In a specific embodiment, the clamp body includes a second limiting structure, which is arranged on the side wall of the clamp body to form the first limiting groove. When the clamp body is subjected to a force along the depth direction of the first limiting groove, the second limiting structure pushes against the viscoelastic material specimen along the depth direction of the first limiting groove.

[0007] In a specific embodiment, the second limiting structure includes a first limiting protrusion, and the first limiting protrusion is provided with a first limiting surface on the side facing the first limiting groove, and the contour shape of the first limiting surface matches the contour shape of the side surface of the viscoelastic material specimen facing the outside of the first limiting groove.

[0008] In a specific embodiment, the first limiting structure includes a baffle, and the clamp body is further provided with a second limiting groove, which is arranged on the peripheral side of the first mounting opening and extends along a third direction perpendicular to the first direction and the second direction. The baffle is inserted into the second limiting groove to at least partially block the first mounting opening; wherein, when the clamp body is subjected to a force parallel to the first direction, the clamp body forming the inner wall of the second limiting groove presses against the baffle along the direction of the force.

[0009] In a specific embodiment, the first limiting structure includes a second limiting protrusion, one end of the second limiting protrusion is connected to the clamp body on the peripheral side of the first mounting opening, and part of the second limiting groove is formed between the other end of the second limiting protrusion and the clamp body. In the second direction, the size of this part of the second limiting groove is slightly larger than the size of the baffle.

[0010] In a specific embodiment, one end of the second limiting protrusion is connected to one end of the clamp body away from the bottom of the first limiting groove, and the first limiting structure also includes a third limiting protrusion, and the third limiting protrusion is arranged at the other end of the clamp body close to the bottom of the first limiting groove, and the second limiting groove is formed between the third limiting protrusion and one end of the second limiting protrusion connected to the clamp body. In the first direction, the size of the second limiting groove is slightly larger than the size of the baffle.

[0011] In a specific embodiment, the viscoelastic material testing fixture further includes a transmission shaft, which is connected to the fixture body in a transmission manner. When the transmission shaft moves under the drive of the power component, the fixture body moves parallel to the first direction under the transmission action of the transmission shaft.

[0012] In a specific embodiment, the end of the clamp body facing away from the first limiting groove is connected to the transmission shaft, and the transmission shaft is arranged parallel to the first limiting groove in the first direction; the transmission shaft is provided with a first pin hole, and the transmission shaft is plugged and fixed to the power component through the first pin hole.

[0013] In a specific embodiment, the viscoelastic material testing fixture also includes a fixing member, which is provided with a through hole, and the fixing member forming the inner wall of the through hole is provided with a thread, and the fixture body also includes a fixing part, which is arranged on the outer periphery of the transmission shaft and adjacent to the first pin hole, and the outer periphery of the fixing part is provided with a thread, and the fixing member is sleeved on the fixing part. When the fixing member is rotated to the top of the fixing part, the upper surface of the fixing member abuts against the power component.

[0014] In order to solve the above technical problems, another technical solution adopted in the present application is: providing a viscoelastic material testing device, comprising a power component and two viscoelastic material testing fixtures as described in any one of the above items, the fixture bodies of the two viscoelastic material testing fixtures are arranged along a first direction, and the first limit grooves of the two fixture bodies are relatively arranged; a power component drives and connects the two fixture bodies respectively; wherein, when the power component is parallel to the first direction and applies forces in opposite directions to the two fixture bodies, the inner walls of the first limit grooves formed by the two fixture bodies respectively apply forces to the two ends of the viscoelastic material specimen along the directions of their respective forces, and the viscoelastic material testing device stretches or compresses the viscoelastic material specimen along the first direction.

[0015] The beneficial effects of the present application are: different from the prior art, the implementation method of the present application uses the first limiting groove and the first limiting structure to limit the viscoelastic material specimen from multiple directions, so that when the viscoelastic material specimen is subjected to a force parallel to the first direction during the test, it is fixed relative to the fixture body; when the first limiting structure is disassembled, the viscoelastic material specimen can also be freely disassembled and assembled through the first mounting port, thereby achieving the effect of flexible replacement of the viscoelastic material specimen and improving the usability of the viscoelastic material testing fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 is a schematic structural diagram of the viscoelastic material testing fixture provided by this application;

[0018] Figure 2 This is a schematic structural diagram of the viscoelastic material testing fixture provided by the present application from another angle;

[0019] Figure 3 It is a schematic diagram of the exploded structure of the viscoelastic material testing fixture provided by this application;

[0020] Figure 4 It is a structural schematic diagram of a viscoelastic material specimen adapted by the viscoelastic material testing fixture of the present application.

[0021] 1. Viscoelastic material test fixture; 2. Fixture body; 21. First limiting groove; 211. First mounting port; 22. Second limiting groove; 23. Second limiting structure; 231. First limiting protrusion; 232. First limiting surface; 3. First limiting structure; 31. Baffle; 32. Second limiting protrusion; 33. Third limiting protrusion; 4. Transmission shaft; 41. Fixing part; 42. First pin hole; 5. Fixing part; 51. Through hole; 6. Viscoelastic material specimen; 61. Second limiting surface; 7. Power assembly; 71. Second pin hole; First direction X; Second direction Y; Third direction Z. DETAILED DESCRIPTION

[0022] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is particularly noted that the following embodiments are only used to illustrate the present application and do not limit the scope of the present application. Similarly, the following embodiments are only some embodiments of the present application and not all embodiments. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0023] The terms "first," "second," and "third" in this application are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of such features. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise specifically defined. All directional indications in the embodiments of this application (such as up, down, left, right, front, back...) are only used to explain the relative positional relationship, movement, etc. between the components under a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. A process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0024] Reference to an "implementation" in this document means that a particular feature, structure, or characteristic described in connection with the implementation can be included in at least one implementation of the application. The appearance of the phrase in various places in the specification is not necessarily all referring to the same implementation, nor is it necessarily referring to a separate or alternative implementation to the other implementations. It will be explicitly understood by one of ordinary skill in the art that the implementations described herein can be combined with other implementations.

[0025] Viscoelastic materials usually go through a period of transportation from the time of manufacture to the time of use. In China, viscoelastic materials are usually transported to the destination by road, rail or mixed transportation. During transportation, viscoelastic materials are also subjected to cyclic vibration loads due to road bumps and the frequency of the transport vehicle itself. Actual viscoelastic materials are difficult to have ideal structural strength and mechanical properties, so cyclic vibration loads will have a certain damage effect on viscoelastic materials. Therefore, carrying out related cyclic loading tests on viscoelastic materials helps to study the structural integrity of viscoelastic materials during transportation.

[0026] However, cyclic loading tests on viscoelastic material test pieces prepared from viscoelastic materials require the design of a suitable test fixture. The test fixture can help the viscoelastic material test piece to be better fixed on the cyclic loading testing machine. The existing cyclic loading test fixture mainly bonds the fixture and the viscoelastic material test piece together by adhesive method, so that the viscoelastic material test piece can be stressed together with the fixture to complete the cyclic loading process.

[0027] However, the adhesive method may have errors due to manual operation, and there may be problems such as poor adhesion causing the viscoelastic material test piece to slip during the test, which will cause large deviations and errors in the test data. During the test, the surface of the viscoelastic material test piece will also generate heat due to stress, and the increase in temperature will cause the adhesive to melt, which may also cause the viscoelastic material test piece to loosen and slip, seriously affecting the accuracy of the test data. At the same time, the adhesive method makes the replacement of the viscoelastic material test piece very inconvenient, greatly increasing the time cost.

[0028] In order to improve or solve the above technical problems, the inventors of the present application have conducted long-term research and propose at least the following embodiments.

[0029] Referring to Figure 1 , Figure 2 and Figure 3 , Figure 1 is a structural schematic diagram of a viscoelastic material test fixture provided by the present application. Figure 2 is a structural schematic diagram of the viscoelastic material test fixture from another angle provided by the present application. Figure 3It is an explosion structure schematic diagram of the viscoelastic material test fixture provided by the application. The application provides a viscoelastic material test fixture (1) for accommodating and limiting one end of a viscoelastic material test piece (6), so as to perform stretching, compression and other operations on the viscoelastic material test piece (6) to test the mechanical properties of the viscoelastic material test piece (6). The viscoelastic material test fixture (1) comprises a fixture main body and a first limiting structure.

[0030] The fixture main body (2) is provided with a first limiting groove (21), and the depth direction of the first limiting groove (21) is defined as a first direction X. In a second direction Y perpendicular to the first direction X, at least one side wall of the first limiting groove (21) of the fixture main body (2) is in communication with the outside to form a first mounting port (211), so that the first limiting groove (21) is at least a semi-closed groove. The first limiting structure (3) detachably blocks the first mounting port (211).

[0031] When the fixture main body (2) is subjected to a force parallel to the first direction X, the fixture main body (2) of the inner wall of the first limiting groove (21) is abutted against the viscoelastic material test piece (6) along the force direction, so as to limit the viscoelastic material test piece (6).

[0032] By using the structure provided in the embodiment, the first limiting groove (21) and the first limiting structure (3) can limit the viscoelastic material test piece (6) from multiple directions, so that the viscoelastic material test piece (6) is fixed relative to the fixture main body (2) when the viscoelastic material test piece (6) is subjected to a force parallel to the first direction X during testing. When the first limiting structure (3) is detached, the viscoelastic material test piece (6) can be freely disassembled through the first mounting port (211), achieving the effect of flexible replacement of the viscoelastic material test piece (6), so that the viscoelastic material test piece (6) can be conveniently disassembled and assembled while being stably fixed, and the usability of the viscoelastic material test fixture (1) is improved.

[0033] In an embodiment, the fixture main body (2) further comprises a second limiting structure (23) arranged on the side wall of the fixture main body (2) forming the first limiting groove (21). When the fixture main body (2) is subjected to a force along the depth direction of the first limiting groove (21), the second limiting structure (23) can abut against the viscoelastic material test piece (6) along the depth direction of the first limiting groove (21). Thus, the second limiting structure (23) limits the viscoelastic material test piece (6) in the direction parallel to the first direction X, reducing the probability of loosening of the fixed connection between the viscoelastic material test piece (6) and the fixture main body (2) and affecting the stability of the viscoelastic material test fixture (1) in fixing the viscoelastic material test piece (6).

[0034] In one embodiment, the second limiting structure (23) includes a first limiting protrusion (231), and a first limiting surface (232) is provided on a side of the first limiting protrusion (231) facing the inside of the first limiting groove (21), and the contour shape of the first limiting surface (232) matches the contour shape of the side surface of the viscoelastic material specimen (6) facing the outside of the first limiting groove (21).

[0035] Specifically, the second limiting structure (23) for limiting the viscoelastic material specimen (6) may include a first limiting protrusion (231), and the first limiting surface (232) on the first limiting protrusion (231) abuts against the viscoelastic material specimen (6), thereby limiting the viscoelastic material specimen (6) in parallel with the first direction X, thereby improving the stability of fixing the viscoelastic material specimen (6).

[0036] In one embodiment, the first limiting structure (3) includes a baffle (31). The clamp body (2) is further provided with a second limiting groove (22), the second limiting groove (22) being arranged on the periphery of the first mounting opening (211) and extending along a third direction Z perpendicular to the first direction X and the second direction Y. The baffle (31) is inserted into the second limiting groove (22) to at least partially block the first mounting opening (211).

[0037] When the clamp body (2) is subjected to a force parallel to the first direction X, the clamp body (2) forming the inner wall of the second limiting groove (22) presses against the baffle (31) along the direction of the force.

[0038] By utilizing the structure provided by this embodiment, the baffle (31) in the first limiting structure (3) can be inserted into the second limiting groove (22) to limit the viscoelastic material specimen (6). When testing is required, the baffle (31) limited in the second limiting groove (22) can prevent the viscoelastic material specimen (6) in the first limiting groove (21) from falling out through the first mounting opening (211), thereby limiting the viscoelastic material specimen (6) parallel to the second direction Y, reducing the shaking of the viscoelastic material specimen (6) in the first limiting groove (21), and improving the stability of fixing the viscoelastic material specimen (6).

[0039] Further reading Figure 4 , Figure 4 The present invention is a schematic structural diagram of a viscoelastic material test piece adapted by the viscoelastic material test fixture of the present application. Specifically, the first limiting surface (232) can be a curved surface, and the viscoelastic material test piece (6) can be provided with a second limiting surface (61). The contour shape of the second limiting surface (61) is consistent with the first limiting surface (232). The two surfaces cooperate with each other so that the viscoelastic material test fixture (1) can limit one end of the viscoelastic material test piece (6) parallel to the first direction X.

[0040] Specifically, the radius of the arc surface of the first limiting surface (232) and the second limiting surface (61) can be 12±0.5mm. The height D of the arc surface of the first limiting surface (232) and the second limiting surface (61) can be 10±0.5mm. The thickness of the viscoelastic material sample (6) can be 10±0.5mm. The total length C of the viscoelastic material sample (6) can be 120±0.5mm. The length B of the viscoelastic material sample (6) after being fixed to the two ends of the viscoelastic material test fixture (1) can be 70±0.5mm. The height E of the viscoelastic material sample (6) can be 25±0.5mm. The dimensions of each part of the first limiting groove (21) correspond to the dimensions of each part of the viscoelastic material sample (6), thereby accurately limiting the viscoelastic material sample (6).

[0041] Optionally, the upper end of the first limiting surface (232) can be flush with the lower end of the baffle (31), thereby limiting the baffle (31). In the second direction Y, the first mounting port (211) can be arranged on both sides of the first limiting groove (21), thereby opening the first limiting groove (21) to facilitate the installation of the viscoelastic material sample (6).

[0042] In an embodiment, the first limiting structure (3) includes a second limiting protrusion (32), one end of the second limiting protrusion (32) is connected to the clamp body (2) on the side of the first mounting port (211), and part of the second limiting groove (22) is formed between the other end of the second limiting protrusion (32) and the clamp body (2). In the second direction Y, the size of the part of the second limiting groove (22) is slightly larger than the size of the baffle (31). This allows the second limiting groove (22) to limit the baffle (31) in the second direction Y, reduces the shaking of the baffle (31) relative to the second limiting groove (22), and improves the stability of the viscoelastic material test fixture (1).

[0043] In an embodiment, one end of the second limiting protrusion (32) is connected to the end of the clamp body (2) away from the bottom of the first limiting groove (21), and the first limiting structure (3) further includes a third limiting protrusion (33) arranged on the other end of the clamp body (2) close to the bottom of the first limiting groove (21). The second limiting groove (22) is formed between the third limiting protrusion (33) and the end of the second limiting protrusion (32) connected to the clamp body (2). In the first direction X, the size of the second limiting groove (22) is slightly larger than the size of the baffle (31), thereby limiting the baffle (31) parallel to the first direction X.

[0044] With the structure provided in this embodiment, the second limiting groove (22) can limit the baffle (31) parallel to the first direction X, thereby reducing the shaking of the baffle (31) relative to the second limiting groove (22) and improving the stability of the viscoelastic material test fixture (1).

[0045] In one embodiment, the viscoelastic material testing fixture (1) further comprises a transmission shaft (4), which is connected to the fixture body (2) in a transmission manner. When the transmission shaft (4) is driven by the power assembly (7) to move, the fixture body (2) moves parallel to the first direction X under the transmission action of the transmission shaft (4).

[0046] By utilizing the structure provided in this embodiment, the power assembly (7) can drive the clamp body (2) to move along the first direction X via the transmission shaft (4), thereby controlling the viscoelastic material specimen (6) to move parallel to the first direction X, so as to test the mechanical properties of the viscoelastic material specimen (6).

[0047] In one embodiment, the end of the clamp body (2) facing away from the first limiting groove (21) is connected to the transmission shaft (4), and the transmission shaft (4) and the first limiting groove (21) are arranged parallel to the first direction X. The transmission shaft (4) is provided with a first latch hole (42), and the transmission shaft (4) is plugged and fixed to the power assembly (7) through the first latch hole (42).

[0048] In this embodiment, the transmission shaft (4) is connected to the power assembly (7) by using the first pin hole (42), thereby achieving relative fixation between the two, thereby achieving the purpose of transmission connection between the power assembly (7) and the viscoelastic material specimen (6) fixed in the fixture body (2).

[0049] In one embodiment, the elastic material testing fixture (1) further comprises a fixing member (5), the fixing member (5) is provided with a through hole (51), the fixing member (5) forming an inner wall of the through hole (51) is provided with a thread, the fixture body (2) further comprises a fixing portion (41), the fixing portion (41) is arranged on the outer periphery of the transmission shaft (4) and adjacent to the first pin hole (42), the outer periphery of the fixing portion (41) is provided with a thread, and the fixing member (5) is sleeved on the fixing portion (41).

[0050] When the fixing member (5) is rotated to the top of the fixing portion (41), the upper surface of the fixing member (5) abuts against the power assembly (7). Thus, while the latch is fixed, the fixing member (5) further limits the power assembly (7), reduces the probability of relative shaking between the power assembly (7) and the fixture body (2), improves the stability of the fixation between the two, and can effectively improve the stability and accuracy of testing the mechanical properties of the viscoelastic material specimen (6).

[0051] The embodiment of the present application provides a viscoelastic material testing device for clamping a viscoelastic material specimen (6) and capable of testing the structural strength and mechanical properties of the viscoelastic material specimen (6) by stretching, compressing, and the like. The viscoelastic material testing device comprises a power assembly (7) and two viscoelastic material testing fixtures (1) as described in any of the above embodiments. The fixture bodies (2) of the two viscoelastic material testing fixtures (1) are arranged vertically along a first direction X, and the first limiting grooves (21) of the two fixture bodies (2) are arranged relative to each other. The power assembly (7) drives and connects the two fixture bodies (2) respectively, so that the viscoelastic material specimen (6) is not subjected to any torsional force after being placed, thereby ensuring that the viscoelastic material specimen (6) is only subjected to vertical load during the test.

[0052] When the power assembly (7) applies forces in opposite directions to the two clamp bodies (2) in parallel with the first direction X, the inner walls of the first limiting grooves (21) formed by the two clamp bodies (2) respectively apply forces to the two ends of the viscoelastic material specimen (6) along the directions in which they are subjected to the forces, and the viscoelastic material testing device stretches or compresses the viscoelastic material specimen (6) along the first direction X. At least one of the two clamp bodies (2) can be connected to a sensor to obtain various data during the test of the viscoelastic material specimen (6).

[0053] By utilizing the structure provided in this embodiment, the first limiting groove (21) and the first limiting structure (3) can be used to limit the viscoelastic material specimen (6) from multiple directions, so that when the viscoelastic material specimen (6) is subjected to a force parallel to the first direction X during the test, it is fixed relative to the fixture body (2); when the first limiting structure (3) is disassembled, the viscoelastic material specimen (6) can also be freely disassembled and assembled through the first mounting port (211), thereby achieving the effect of flexibly replacing the viscoelastic material specimen (6), thereby achieving convenient disassembly and assembly of the viscoelastic material specimen (6) while stably fixing the viscoelastic material specimen (6), thereby improving the usability of the viscoelastic material testing device.

[0054] The above description is only part of the implementation methods of the present application, and does not limit the scope of protection of the present application. Any equivalent device or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly used in other related technical fields, are also included in the scope of patent protection of this application.

Claims

1. A viscoelastic material testing fixture (1), characterized in that: include: The clamp body (2) is provided with a first limiting groove (21), with a depth direction parallel to the first limiting groove (21) being a first direction. In a second direction perpendicular to the first direction, at least one side of a side wall of the clamp body (2) forming the first limiting groove (21) is connected to the outside to form a first mounting opening (211), so that the first limiting groove (21) is at least a semi-closed groove; a first limiting structure (3) for detachably blocking the first mounting opening (211); the first limiting structure (3) includes a baffle (31); the clamp body (2) is further provided with a second limiting groove (22); the second limiting groove (22) is arranged on the peripheral side of the first mounting opening (211) and extends along a third direction perpendicular to the first direction and the second direction; the baffle (31) is inserted into the second limiting groove (22) to at least partially block the first mounting opening (211); wherein, when the clamp body (2) is subjected to a force parallel to the first direction, the clamp body (2) forming the inner wall of the second limiting groove (22) presses against the baffle (31) along the direction of the force; When the clamp body (2) is subjected to a force parallel to the first direction, the clamp body (2) forming the inner wall of the first limiting groove (21) is used to press against the viscoelastic material specimen (6) along the direction of force application.

2. The viscoelastic material testing fixture (1) according to claim 1, characterized in that: The clamp body (2) includes a second limiting structure (23), which is arranged on the side wall of the clamp body (2) to form the first limiting groove (21). When the clamp body (2) is subjected to a force along the depth direction of the first limiting groove (21), the second limiting structure (23) presses against the viscoelastic material specimen (6) along the depth direction of the first limiting groove (21).

3. The viscoelastic material testing fixture (1) according to claim 2, characterized in that: The second limiting structure (23) comprises a first limiting protrusion (231), and a first limiting surface (232) is provided on a side of the first limiting protrusion (231) facing the inside of the first limiting groove (21), and the contour shape of the first limiting surface (232) matches the contour shape of the side surface of the viscoelastic material specimen (6) facing the outside of the first limiting groove (21).

4. The viscoelastic material testing fixture (1) according to any one of claims 1 to 3, characterized in that: The first limiting structure (3) includes a second limiting protrusion (32), one end of the second limiting protrusion (32) is connected to the clamp body (2) on the peripheral side of the first mounting opening (211), and a portion of the second limiting groove (22) is formed between the other end of the second limiting protrusion (32) and the clamp body (2). In the second direction, the size of the portion of the second limiting groove (22) is slightly larger than the size of the baffle (31).

5. The viscoelastic material testing fixture (1) according to claim 4, characterized in that: One end of the second limiting protrusion (32) is connected to one end of the clamp body (2) away from the bottom of the first limiting groove (21), and the first limiting structure (3) also includes a third limiting protrusion (33), and the third limiting protrusion (33) is arranged at the other end of the clamp body (2) close to the bottom of the first limiting groove (21). The second limiting groove (22) is formed between the third limiting protrusion (33) and one end of the second limiting protrusion (32) connected to the clamp body (2). In the first direction, the size of the second limiting groove (22) is slightly larger than the size of the baffle (31).

6. The viscoelastic material testing fixture (1) according to claim 1, characterized in that: The viscoelastic material testing fixture (1) further comprises a transmission shaft (4), wherein the transmission shaft (4) is connected to a power assembly (7) of the fixture body (2) in a transmission manner. When the transmission shaft (4) is driven by the power assembly (7) to move, the fixture body (2) moves parallel to the first direction under the transmission action of the transmission shaft (4).

7. The viscoelastic material testing fixture (1) according to claim 6, characterized in that: One end of the clamp body (2) facing away from the first limiting groove (21) is connected to the transmission shaft (4), and the transmission shaft (4) and the first limiting groove (21) are arranged parallel to the first direction; the transmission shaft (4) is provided with a first latch hole (42), and the transmission shaft (4) is plugged and fixed to the power assembly (7) through the first latch hole (42).

8. The viscoelastic material testing fixture (1) according to claim 7, characterized in that: The viscoelastic material testing fixture (1) further comprises a fixing member (5), the fixing member (5) is provided with a through hole (51), the fixing member (5) forming the inner wall of the through hole (51) is provided with a thread, the fixture body (2) further comprises a fixing portion (41), the fixing portion (41) is arranged on the outer periphery of the transmission shaft (4) and adjacent to the first pin hole (42), the outer periphery of the fixing portion (41) is provided with a thread, the fixing member (5) is sleeved on the fixing portion (41), and when the fixing member (5) is rotated to the top of the fixing portion (41), the upper surface of the fixing member (5) abuts against the power component (7).

9. A viscoelastic material testing device, characterized in that: include: Two viscoelastic material testing fixtures (1) according to any one of claims 1 to 8, wherein the fixture bodies (2) of the two viscoelastic material testing fixtures (1) are arranged along a first direction, and the first limiting grooves (21) of the two fixture bodies (2) are arranged opposite to each other; A power assembly (7) is used to drive and connect the two clamp bodies (2) respectively; When the power assembly (7) applies forces in opposite directions to the two clamp bodies (2) in parallel with the first direction, the inner walls of the first limiting groove (21) formed by the two clamp bodies (2) respectively apply forces to the two ends of the viscoelastic material specimen (6) along the directions in which they are subjected to the forces, and the viscoelastic material testing device stretches or compresses the viscoelastic material specimen (6) along the first direction.

Images