A multifunctional clamp

Abstract

The application belongs to the technical field of test clamps, and discloses a multifunctional clamp, which comprises a clamp body provided with a mounting groove, a clamping module arranged in the mounting groove, an elastic pressure structure arranged in the clamping module, and a side clamping structure arranged in the clamping module. The clamping module is provided with a first end located in the mounting groove and a second end opposite to the first end. The clamping module is provided with a clamping groove located between the first end and the second end and a communication groove arranged at the second end and communicated with the clamping groove. The elastic pressure structure can exert an elastic extrusion force on the material located in the clamping groove in the direction of the second end. The side clamping structure can extrude the material located in the clamping groove from the side, so that the clamp in the application can not only clamp and fix the material with a protruding part at the end, but also clamp and fix the material without a protruding part at the end, thereby increasing the flexibility of the clamp, reducing the testing cost of the material, and improving the testing efficiency.

Description

Technical Field

[0001] This application belongs to the technical field of test fixtures, specifically relating to a multifunctional fixture. Background Technology

[0002] In scientific research experiments, the testing of the mechanical properties of materials is of utmost importance. The test results directly affect the evaluation of product quality and safety performance. Different tests are required for different materials, which mainly include peel tests to test the bond strength between materials, tensile tests to test the tensile strength of materials, and shear tests to test the shear strength of materials.

[0003] Currently, when testing the mechanical properties of materials, two clamping modules need to be installed onto the two fixtures of a universal testing machine. Then, the two ends of the material are connected to the two clamping modules to hold the material. The universal testing machine is then started, causing the crossbeam to move one of the fixtures, which in turn moves the clamping module. This subjects the two ends of the material to tensile forces in opposite directions, enabling peel or tensile tests. Alternatively, the universal testing machine can apply force to the ends of the material, placing it in a tensile state for subsequent shear tests. However, since each clamping module is only suitable for a single test, multiple sets of clamping modules are required in the laboratory. Furthermore, the clamping modules need to be replaced for different mechanical property tests, increasing testing costs and reducing testing efficiency. Utility Model Content

[0004] This application provides a multifunctional fixture to reduce the testing cost of materials and improve testing efficiency.

[0005] The technical solution adopted in this application is as follows:

[0006] A multifunctional clamp includes a clamp body with a mounting groove, a clamping module disposed in the mounting groove, an elastic pressure-applying structure disposed in the clamping module, and a side clamping structure disposed in the clamping module. The clamping module has a first end located inside the mounting groove and a second end opposite to the first end and exposed outside the mounting groove. The clamping module is provided with a clamping groove located between the first end and the second end and a communicating groove disposed at the second end and communicating with the clamping groove. The elastic pressure-applying structure can apply an elastic extrusion force toward the second end to the material located in the clamping groove, and the side clamping structure can perform lateral extrusion on the material located in the clamping groove.

[0007] By adopting the above technical solution, since the clamping groove in this application is provided with an elastic pressure structure and a side clamping structure, and the elastic pressure structure can apply an elastic extrusion force toward the second end to the material located in the clamping groove, while the side clamping structure can perform lateral extrusion on the material located in the clamping groove, the multifunctional fixture in this application can not only clamp materials with protrusions at the ends, such as dumbbell-shaped specimens for tensile testing or steel wire specimens with protrusions at the ends for shear testing, but also clamp materials without protrusions at the ends, such as strip specimens for peel testing. As a result, one set of fixtures in this application can realize multiple mechanical property tests, avoiding the need to configure multiple sets of clamping modules in the laboratory, and avoiding the need to replace the clamping modules when testing different materials, thereby reducing testing costs and improving testing efficiency.

[0008] Optionally, the elastic pressure structure includes a pressure plate disposed on the clamping module, a guide rod disposed on the pressure plate, and an elastic element that applies an elastic force toward the second end to the guide rod. The pressure plate is located in the clamping groove, the clamping module is provided with a receiving cavity, one end of the guide rod extends into the receiving cavity, and the elastic element is located in the receiving cavity and acts on the end of the guide rod away from the pressure plate.

[0009] By adopting the above technical solution, when clamping materials with protruding ends, the pressure plate is first pushed in the direction away from the second end, so that the pressure plate drives the guide rod to move. Then, the guide rod overcomes the elastic force of the elastic element and moves in the direction away from the second end, so that the pressure plate moves in the direction away from the second end. Then, the end of the material is placed in the clamping groove, that is, the protruding part of the material is placed in the clamping groove, and the main body of the material passes through the connecting groove. Then, the pressure plate is released, and the elastic element loses the pressure in the direction away from the second end, so that the elastic element gradually recovers its deformation, thereby causing the elastic element to push the guide rod to move in the direction of the second end, so that the guide rod drives the pressure plate to move in the direction of the second end. Finally, the pressure plate is pressed against the protruding part of the material end under the action of the elastic element, so as to achieve the compression and fixation of the material.

[0010] Optionally, the guide rod is provided with a guide ring located in the accommodating cavity, the elastic element acts on the guide ring, the clamping module is provided with a strip groove communicating with the accommodating cavity, and the guide ring is provided with a drive rod extending out of the clamping module through the strip groove.

[0011] By adopting the above technical solution, when driving the pressure plate in the direction away from the second end, the operator only needs to apply a thrust away from the second end to the drive rod, so that the drive rod slides relative to the strip groove. At the same time, the drive rod drives the guide ring to move, and the guide ring drives the guide rod to move, which in turn drives the pressure plate to move in the direction away from the second end. Compared with directly applying a force away from the second end to the pressure plate, this greatly reduces the operator's difficulty, thereby improving the material clamping efficiency and further improving the material testing efficiency.

[0012] Optionally, the sidewall of the strip groove is provided with a limiting groove that can accommodate the drive rod. When the drive rod is located in the limiting groove, the pressure plate abuts against the groove wall of the clamping groove near the first end.

[0013] By adopting the above technical solution, when testing materials that need to be side-clamped, the drive rod is first driven in the direction away from the second end, so that the drive rod, under the action of the guide ring and the guide rod, drives the pressure plate to move in the direction away from the second end. When the pressure plate abuts against the groove wall of the clamping groove near the first end, the drive rod is opposite to the limiting groove. Then, a lateral force is applied to the drive rod so that the drive rod moves into the limiting groove. Thus, the cooperation between the drive rod and the limiting groove is used to limit the pressure plate, so that the pressure plate and the side clamping structure can avoid each other, so as to ensure that the side clamping structure can apply lateral extrusion force to the side of the material, so as to clamp and fix the material that does not have a protrusion at the end.

[0014] Optionally, the opening of the accommodating cavity is located at the first end, and the clamping module is detachably connected to a cap for sealing the opening of the accommodating cavity.

[0015] By adopting the above technical solution, since the cavity opening is located at the first end, it is possible to facilitate the installation of the elastic element and the guide rod, thereby reducing the assembly efficiency of the multi-functional fixture; and the clamping module can be detachably connected with a cover for sealing the cavity opening, so that the cover can block the elastic element and increase the stability of the elastic element.

[0016] Optionally, the elastic element is a spring, the guide rod is hollow inside, and the cover is provided with a guide rod that passes through the spring and extends into the guide rod.

[0017] By adopting the above technical solution, since the cover is provided with a guide rod that passes through the spring and extends into the guide rod, on the one hand, the guide rod can guide the spring to increase the stability of the spring, and on the other hand, the guide rod can also guide the guide rod to increase the stability of the guide rod, thereby increasing the stability of the pressure plate.

[0018] Optionally, two sets of the side clamping structures are arranged opposite each other, and each set of the side clamping structures includes a clamping plate and a pressure rod threaded to the clamp body. The clamping plate is located inside the clamping groove, and the clamping module is provided with a through hole corresponding to the pressure rod. The inner end of the pressure rod extends into the through hole to apply a squeezing force toward the inside of the clamping groove to the clamping plate.

[0019] By adopting the above technical solution, since the side clamping structure is arranged in two sets, when clamping materials without protrusions at the ends, the material can be centered and clamped to avoid the end of the material shifting to one side of the clamping groove and affecting the test results, thereby improving the accuracy of the test results.

[0020] When clamping materials without protrusions at the ends, the drive rod is first driven into the limiting groove so that the pressure plate abuts against the groove wall near the first end of the clamping groove, thereby creating a clearance between the pressure plate and the clamping plate. Then, the end of the material is placed in the clamping groove, with the main body of the material passing through the connecting groove. The pressure rod is then rotated so that it rotates relative to the clamping body. Since the pressure rod is threadedly connected to the clamping body, it moves along its own axis when rotating relative to the clamping body, so that the pressure rod applies a force to the clamping plate in the direction toward the inside of the clamping groove. Finally, the clamping plates of the two sets of side clamping structures are pressed against the opposite sides of the material to achieve clamping and fixing of the end of the material.

[0021] Optionally, the clamping plate is provided with a connecting tube extending into the through hole, and the inner end of the pressure rod can extend into the connecting tube.

[0022] By adopting the above technical solution, since the inner end of the pressure rod can extend into the connecting pipe, the clamping plate can be limited by the insertion and engagement of the pressure rod and the connecting pipe, thereby preventing the clamping plate from tilting or coming out of the clamping groove, thus increasing the stability of the clamping plate.

[0023] Optionally, the inner end of the pressure rod is provided with a first annular groove, in which a snap-fit ​​ring is provided, and the inner wall of the connecting pipe is provided with a second annular groove, with at least a portion of the snap-fit ​​ring located in the second annular groove.

[0024] By adopting the above technical solution, since a snap-fit ​​ring is provided in the first annular groove and a second annular groove is provided on the inner wall of the connecting pipe, at least a portion of the snap-fit ​​ring is located in the second annular groove. Thus, the snap-fit ​​ring can cooperate with the groove walls of the first and second annular grooves to realize the reciprocating motion of the clamping plate following the pressure rod. This avoids the situation where the clamping plate cannot follow the pressure rod to move away from the material when the clamping and fixing of the material is released, thereby ensuring the efficiency of releasing the clamping and fixing of the material.

[0025] Optionally, the snap ring has a deformation notch, and the distance between the deformation notch and the two opening walls can change elastically.

[0026] By adopting the above technical solution, the snap ring has a deformation notch, which allows the distance between the two opposite walls of the deformation notch to change elastically. This allows the diameter of the snap ring to increase elastically when it is installed in the first ring groove, and then the snap ring moves into the first ring groove and then returns to its original shape. When the end of the pressure rod is inserted into the connecting pipe, the snap ring undergoes elastic deformation under the action of the pipe wall, causing the diameter of the snap ring to decrease and enter the interior of the connecting pipe. When the snap ring moves to the position of the second ring groove, it returns to its original shape and extends into the second ring groove, thus realizing the connection of the connecting pipe and the pressure rod together using the snap ring.

[0027] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0028] The multifunctional fixture of this application includes a fixture body with a mounting groove, a clamping module disposed in the mounting groove, an elastic pressure structure disposed in the clamping module, and a side clamping structure disposed in the clamping module. The clamping module has a first end located inside the mounting groove and a second end opposite to the first end and exposed outside the mounting groove. The clamping module is provided with a clamping groove located between the first end and the second end and a connecting groove disposed at the second end and connected to the clamping groove. The elastic pressure structure can apply an elastic extrusion force toward the second end to the material located in the clamping groove. The side clamping structure can perform lateral extrusion on the material located in the clamping groove. Thus, the multifunctional fixture of this application can not only clamp materials with protrusions at the ends, but also clamp materials without protrusions at the ends. This allows a single fixture to perform multiple mechanical property tests, avoiding the need to configure multiple clamping modules in the laboratory and avoiding the need to replace the clamping modules when testing different materials, thereby reducing testing costs and improving testing efficiency.

[0029] The elastic pressure structure in this application includes a pressure plate disposed in the clamping module, a guide rod disposed in the pressure plate, and an elastic element that applies an elastic force toward the second end to the guide rod. The pressure plate is located in the clamping groove, and the clamping module is provided with a receiving cavity. One end of the guide rod extends into the receiving cavity, and the elastic element is located in the receiving cavity and acts on the end of the guide rod away from the pressure plate. When clamping a material with a protrusion at the end, the pressure plate is first pushed in the direction away from the second end, so that the pressure plate drives the guide rod to move, thereby causing the guide rod to overcome the elastic force of the elastic element and move away from the second end. The material is moved in the direction of the pressure plate away from the second end, and then the end of the material is placed in the clamping groove, that is, the protrusion of the material is placed in the clamping groove, and the main body of the material passes through the connecting groove. Then the pressure plate is released, and the elastic element loses the pressure away from the second end, so that the elastic element gradually recovers its deformation, thereby causing the elastic element to push the guide rod to move towards the second end, so that the guide rod drives the pressure plate to move towards the second end, and finally the pressure plate is pressed against the protrusion of the end of the material under the action of the elastic element, so as to achieve the compression and fixation of the material.

[0030] The guide rod in this application is provided with a guide ring located in the accommodating cavity. An elastic element acts on the guide ring. The clamping module is provided with a strip groove communicating with the accommodating cavity. The guide ring is provided with a drive rod extending out of the clamping module through the strip groove. When the pressure plate is driven in the direction away from the second end, the operator only needs to apply a pushing force away from the second end to the drive rod to make the drive rod slide relative to the strip groove. At the same time, the drive rod drives the guide ring to move, and the guide ring drives the guide rod to move. Finally, the guide rod drives the pressure plate to move, so as to realize the movement of the pressure plate in the direction away from the second end. Compared with directly applying a force away from the second end to the pressure plate, the operation difficulty of the operator is greatly reduced, thereby improving the clamping efficiency of the material and further improving the testing efficiency of the material. Attached Figure Description

[0031] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0032] Figure 1 This is a schematic diagram of the structure of the multifunctional clamp described in one embodiment of this application;

[0033] Figure 2 This is a partial structural schematic diagram of the multifunctional clamp described in one embodiment of this application;

[0034] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0035] Figure 4 This is a cross-sectional view of the cap, guide rod, guide ring, guide rod, and pressure plate described in this application;

[0036] Figure 5 This is a schematic diagram of the clamping module described in one embodiment of this application;

[0037] Figure 6 for Figure 5 Sectional view of AA;

[0038] Figure 7 This is a cross-sectional view of the clamping plate, connecting pipe, and pressure rod described in this application;

[0039] Figure 8 This is a schematic diagram of the multifunctional clamp described in one embodiment of the present application clamping and fixing a tensile or shear specimen.

[0040] Figure 9 This is a schematic diagram of the multifunctional clamp described in one embodiment of this application clamping and fixing the peeling test.

[0041] Figure label:

[0042] 1. Fixture body; 11. Mounting slot; 2. Clamping module; 21. Clamping slot; 22. Connecting slot; 23. Receiving cavity; 231. Strip groove; 232. Limiting slot; 24. Cover; 241. Guide rod; 25. Through hole; 3. Elastic pressure structure; 31. Pressure plate; 32. Guide rod; 321. Guide ring; 322. Drive rod; 33. Elastic element; 4. Side clamping structure; 41. Clamping plate; 411. Connecting pipe; 412. Second ring groove; 42. Pressure rod; 421. Hand handle; 422. First ring groove; 423. Snap ring; 424. Deformation notch. Detailed Implementation

[0043] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0044] Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of this application and the features thereof can be combined with each other.

[0045] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0046] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0047] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0048] Reference Figures 1 to 9 A multifunctional clamp is disclosed, comprising a clamp body 1 having a mounting groove 11, a clamping module 2 disposed in the mounting groove 11, an elastic pressure structure 3 disposed in the clamping module 2, and a side clamping structure 4 disposed in the clamping module 2. The clamping module 2 has a first end located inside the mounting groove 11 and a second end opposite to the first end and exposed outside the mounting groove 11. The clamping module 2 is provided with a clamping groove 21 located between the first end and the second end and a connecting groove 22 disposed at the second end and connected to the clamping groove 21. The elastic pressure structure 3 can apply an elastic extrusion force toward the second end to the material located in the clamping groove 21, and the side clamping structure 4 can perform lateral extrusion on the material located in the clamping groove 21.

[0049] It should be noted that two multifunctional fixtures are required when using the multifunctional fixtures described in this application. One fixture is connected to the crossbeam of the universal testing machine, and the other is connected to the top beam or base of the universal testing machine, with the two multifunctional fixtures positioned opposite each other. The multifunctional fixture can be connected to the universal testing machine via a pin, or it can be fixed to the universal testing machine using fasteners.

[0050] In the prior art, the ends of the specimens used for tensile or shear tests on materials are all protruding. For example, the specimens used for tensile tests are dumbbell-shaped, and the specimens used for shear tests are commonly steel wires with square blocks at both ends. However, the ends of the specimens used for peel tests on materials are not protruding; that is, the ends of the specimens used for peel tests are flat.

[0051] Specifically, when performing tensile or shear tests on the specimen, both ends of the specimen are installed into the clamping slots 21 of two multi-functional fixtures, while the main body of the specimen passes through the connecting slot. Then, the elastic pressure structure 3 is used to apply a compressive force towards the second end to fix it in place, and then the next tensile or shear test can be performed.

[0052] When performing a peel test on the sample, first place both sides of one end of the sample into the clamping slots 21 of the two multi-functional fixtures, while simultaneously allowing the main body of the sample to pass through the connecting slot. Then, use the side clamping structure 4 to squeeze the sample from the side to fix it in place, and then proceed with the next peel test.

[0053] In summary, the multifunctional fixture in this application can not only clamp and fix materials with protruding ends, but also materials without protruding ends. This allows a single fixture to perform multiple mechanical property tests, avoiding the need to configure multiple clamping modules 2 in the laboratory. It also avoids the need to replace clamping modules 2 when testing different materials, thereby reducing testing costs and improving testing efficiency.

[0054] In a preferred embodiment, refer to Figure 2 and Figure 4 The elastic pressure structure 3 includes a pressure plate 31 disposed on the clamping module 2, a guide rod 32 disposed on the pressure plate 31, and an elastic element 33 that applies an elastic force toward the second end to the guide rod 32. The pressure plate 31 is located in the clamping groove 21. The clamping module 2 is provided with a receiving cavity 23. One end of the guide rod 32 extends into the receiving cavity 23. The elastic element 33 is located in the receiving cavity 23 and acts on the end of the guide rod 32 away from the pressure plate 31.

[0055] When clamping a material with a protruding end, the pressure plate 31 is first pushed away from the second end, causing the pressure plate 31 to drive the guide rod 32 to move. Then, the guide rod 32 overcomes the elastic force of the elastic member 33 and moves away from the second end, causing the pressure plate 31 to move away from the second end. Then, the end of the material is placed in the clamping groove 21, that is, the protruding part of the material is placed in the clamping groove 21, and the main body of the material passes through the connecting groove 22. Then, the pressure plate 31 is released, and the elastic member 33 loses the pressure away from the second end, allowing the elastic member 33 to gradually recover its deformation. This causes the elastic member 33 to push the guide rod 32 towards the second end, causing the guide rod 32 to drive the pressure plate 31 towards the second end. Finally, the pressure plate 31 is pressed against the protruding part of the material end under the action of the elastic member 33, so as to achieve the compression and fixation of the material.

[0056] Furthermore, refer to Figure 2 and Figure 4 The guide rod 32 is provided with a guide ring 321 located in the accommodating cavity 23. The elastic element 33 acts on the guide ring 321. The clamping module 2 is provided with a strip groove 231 communicating with the accommodating cavity 23. The guide ring 321 is provided with a drive rod 322 extending out of the clamping module 2 through the strip groove 231.

[0057] When driving the pressure plate 31 in a direction away from the second end, the operator only needs to apply a thrust to the drive rod 322 in a direction away from the second end, so that the drive rod 322 slides relative to the strip groove 231. At the same time, the drive rod 322 drives the guide ring 321 to move, and the guide ring 321 drives the guide rod 32 to move, which in turn drives the guide rod 32 to move the pressure plate 31, so that the pressure plate 31 moves in a direction away from the second end. Compared with directly applying a force to the pressure plate 31 in a direction away from the second end, the operator's operation difficulty is greatly reduced, thereby improving the clamping efficiency of the material and further improving the testing efficiency of the material.

[0058] Preferably, the drive rod 322 is arranged perpendicularly to the guide rod 32, and the drive rod 322 is threadedly connected to the guide rod 32. That is, the end of the drive rod 322 is threaded into the guide ring 321 to facilitate the installation of the drive rod 322.

[0059] Furthermore, refer to Figure 5 and Figure 6 The side wall of the strip groove 231 is provided with a limiting groove 232 that can accommodate the drive rod 322. When the drive rod 322 is located in the limiting groove 232, the pressure plate 31 abuts against the groove wall of the clamping groove 21 near the first end.

[0060] Understandably, there are two limiting grooves 232, located on opposite sides of the strip groove 231, to increase the number of points that can limit the drive rod 322.

[0061] When testing materials that require side clamping, the drive rod 322 is first driven in the direction away from the second end, so that the drive rod 322, under the action of the guide ring 321 and the guide rod 32, drives the pressure plate 31 to move in the direction away from the second end. When the pressure plate 31 abuts against the groove wall of the clamping groove 21 near the first end, the drive rod 322 is opposite to the limiting groove 232. Then, a lateral force is applied to the drive rod 322 so that the drive rod 322 moves into the limiting groove 232. Thus, the cooperation between the drive rod 322 and the limiting groove 232 is used to limit the pressure plate 31, so that the pressure plate 31 and the side clamping structure 4 form a clearance, so that the side clamping structure 4 can apply lateral extrusion force to the side of the material, so as to clamp and fix the material that does not have a protrusion at the end.

[0062] This application does not specifically limit the structure of the pressure plate 31. Preferably, the pressure plate 31 has a circular end face, so that when the drive rod 322 drives the guide rod 32 to rotate, the pressure plate 31 can avoid the side wall of the clamping groove 21, thus preventing the drive rod 322 from being unable to move into the limiting groove 232 due to jamming between the pressure plate 31 and the side wall of the clamping groove 21. In other embodiments, the pressure plate 31 and the guide rod 32 can also be rotatably connected to avoid jamming between the pressure plate 31 and the side wall of the clamping groove 21.

[0063] Furthermore, refer to Figure 2 and Figure 4 The cavity opening of the accommodating cavity 23 is located at the first end, and the clamping module 2 is detachably connected to a cover 24 for sealing the cavity opening of the accommodating cavity 23.

[0064] It is understandable that when the guide rod 32 is installed, it needs to be inserted into the receiving cavity 23 through the cavity opening of the receiving cavity 23.

[0065] Since the opening of the accommodating cavity 23 is located at the first end, it can facilitate the installation of the elastic element 33 and the guide rod 32, thereby reducing the assembly efficiency of the multi-functional fixture; and the clamping module 2 can be detachably connected to a cover 24 for sealing the opening of the accommodating cavity 23, so that the cover 24 can block the elastic element 33 to increase the stability of the elastic element 33.

[0066] This application does not specify the connection method between the guide rod 32 and the pressure plate 31. The two can be fixed with screws, or they can be connected by threads or magnetic attraction. As long as the two are connected in a detachable manner, it can ensure that the pressure plate 31 can be installed into the clamping groove 21.

[0067] This application does not specify a particular connection method between the cover 24 and the clamping module 2. Preferably, the cover 24 has a circular structure, with threads at the opening of the accommodating cavity 23 and threads also on the outer circumferential surface of the cover 24, so that the cover 24 is connected to the clamping module 2 by a threaded connection. Of course, in other embodiments, the cover 24 can also be fixedly connected to the clamping module 2 by screws or other fasteners.

[0068] The better one is to refer to Figure 2 and Figure 4 The elastic element 33 is a spring, the guide rod 32 is hollow inside, and the cover 24 is provided with a guide rod 241 that passes through the spring and extends into the guide rod 32. On the one hand, the guide rod 241 can guide the spring to increase the stability of the spring. On the other hand, the guide rod 241 can also guide the guide rod 32 to increase the stability of the guide rod 32, thereby increasing the stability of the pressure plate 31.

[0069] This application does not specify the connection method between the guide rod 241 and the cover 24. Preferably, the guide rod 241 is fixedly connected to the cover 24 to increase the connection stability between the guide rod 241 and the cover 24. In other embodiments, the guide rod 241 can also be connected to the cover 24 by a threaded connection.

[0070] In a preferred embodiment, refer to Figure 2 , Figure 3 and Figure 7 Two sets of side clamping structures 4 are arranged opposite each other, and each set of side clamping structures 4 includes a clamping plate 41 and a pressure rod 42 threadedly connected to the clamp body 1. The clamping plate 41 is located inside the clamping groove 21. The clamping module 2 is provided with a through hole 25 corresponding to the pressure rod 42. The inner end of the pressure rod 42 extends into the through hole 25 to apply a squeezing force toward the inside of the clamping groove 21 to the clamping plate 41.

[0071] Since the side clamping structure 4 is provided in two sets, when clamping materials that do not have protrusions at the ends, it is possible to achieve centering clamping of the materials, so as to avoid the end of the materials shifting to one side of the clamping groove 21 and affecting the test results, thereby improving the accuracy of the test results.

[0072] When clamping materials without protrusions at the ends, the drive rod 322 is first driven into the limiting groove 232 so that the pressure plate 31 abuts against the groove wall of the clamping groove 21 near the first end, thereby making the pressure plate 31 and the clamping plate 41 avoid each other. Then, the end of the material is placed in the clamping groove 21, and the main body of the material passes through the connecting groove 22. Then, the pressure rod 42 is rotated so that the pressure rod 42 and the clamp body 1 rotate relative to each other. Since the pressure rod 42 is threadedly connected to the clamp body 1, the pressure rod 42 will move along its own axis when it rotates relative to the clamp body 1, so that the pressure rod 42 applies a force to the clamping plate 41 in the direction toward the inside of the clamping groove 21. Finally, the clamping plates 41 of the two sets of side clamping structures 4 are pressed against the opposite sides of the material to achieve clamping and fixing of the end of the material.

[0073] The better one is to refer to Figure 2 The outer end of the pressure rod 42 is provided with a hand handle 421, which is perpendicular to the pressure rod 42. This allows the operator to rotate the pressure rod 42 by holding the hand handle 421, thus preventing the hand from slipping on the pressure rod 42 and improving the material clamping efficiency.

[0074] Furthermore, refer to Figure 3 and Figure 7 The clamping plate 41 is fixedly connected to a connecting pipe 411 that extends into the through hole 25. The inner end of the pressure rod 42 can extend into the connecting pipe 411. The clamping plate 41 can be limited by the insertion and engagement of the pressure rod 42 and the connecting pipe 411, thereby preventing the clamping plate 41 from tilting or coming out of the clamping groove 21, and thus increasing the stability of the clamping plate 41.

[0075] Furthermore, refer to Figure 7 The inner end of the pressure rod 42 is provided with a first annular groove 422, and a snap ring 423 is provided in the first annular groove 422. The inner wall of the connecting pipe 411 is provided with a second annular groove 412. At least a part of the snap ring 423 is located in the second annular groove 412. The snap ring 423 can cooperate with the groove walls of the first annular groove 422 and the second annular groove 412 to realize that the clamping plate 41 reciprocates with the pressure rod 42. This avoids the situation where the clamping plate 41 cannot follow the pressure rod 42 to move away from the material when the clamping and fixing is released, thereby ensuring the efficiency of releasing the clamping and fixing of the material.

[0076] Understandably, in the non-deformed state, the outer diameter of the snap ring 423 is greater than the inner diameter of the connecting pipe 411 and less than or equal to the ring wall diameter of the second ring groove 412, and the inner diameter of the snap ring 423 is greater than the ring wall diameter of the first ring groove 422 and less than the diameter of the pressure rod 42.

[0077] The better one is to refer to Figure 3 The snap ring 423 has a deformation notch 424, and the distance between the deformation notch 424 and the two walls can elastically change, so that when the snap ring 423 is installed into the first annular groove 422, the diameter of the snap ring 423 can elastically increase, and then the snap ring 423 moves into the first annular groove 422 and then returns to its original shape. When the end of the pressure rod 42 is inserted into the connecting pipe 411, the snap ring 423 undergoes elastic deformation under the action of the pipe wall of the connecting pipe 411, so that the diameter of the snap ring 423 decreases and enters the interior of the connecting pipe 411. When the snap ring 423 moves to the position of the second annular groove 412, the snap ring 423 returns to its original shape and extends into the second annular groove 412, thereby realizing the connection of the connecting pipe 411 and the pressure rod 42 by using the snap ring 423.

[0078] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0079] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0080] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A multifunctional clamp characterized by, The fixture includes a clamp body (1) with a mounting groove (11), a clamping module (2) disposed in the mounting groove (11), an elastic pressure structure (3) disposed in the clamping module (2), and a side clamping structure (4) disposed in the clamping module (2). The clamping module (2) has a first end located inside the mounting groove (11) and a second end opposite to the first end and exposed outside the mounting groove (11). The clamping module (2) is provided with a clamping groove (21) located between the first end and the second end and a connecting groove (22) disposed at the second end and connected to the clamping groove (21). The elastic pressure structure (3) can apply an elastic extrusion force toward the second end to the material located in the clamping groove (21). The side clamping structure (4) can perform side extrusion on the material located in the clamping groove (21).

2. The multi-functional fixture according to claim 1, wherein The elastic pressure structure (3) includes a pressure plate (31) disposed in the clamping module (2), a guide rod (32) disposed in the pressure plate (31), and an elastic member (33) that applies an elastic force toward the second end to the guide rod (32). The pressure plate (31) is located in the clamping groove (21). The clamping module (2) is provided with a receiving cavity (23). One end of the guide rod (32) extends into the receiving cavity (23). The elastic member (33) is located in the receiving cavity (23) and acts on the end of the guide rod (32) away from the pressure plate (31).

3. The multi-functional fixture according to claim 2, wherein The guide rod (32) is provided with a guide ring (321) located in the accommodating cavity (23), the elastic element (33) acts on the guide ring (321), the clamping module (2) is provided with a strip groove (231) communicating with the accommodating cavity (23), and the guide ring (321) is provided with a drive rod (322) extending out of the clamping module (2) through the strip groove (231).

4. The multi-functional fixture according to claim 3, wherein The side wall of the strip groove (231) is provided with a limiting groove (232) that can accommodate the drive rod (322). When the drive rod (322) is located in the limiting groove (232), the pressure plate (31) abuts against the groove wall of the clamping groove (21) near the first end.

5. The multi-functional fixture of claim 2, wherein The opening of the accommodating cavity (23) is located at the first end, and the clamping module (2) is detachably connected to a cap (24) for sealing the opening of the accommodating cavity (23).

6. The multi-functional fixture of claim 5, wherein The elastic element (33) is a spring, the guide rod (32) is hollow inside, and the cover (24) is provided with a guide rod (241) that passes through the spring and extends into the guide rod (32).

7. The multi-functional fixture of claim 1, wherein The side clamping structure (4) is arranged in two sets opposite to each other, and each set of the side clamping structure (4) includes a clamping plate (41) and a pressure rod (42) threaded to the clamp body (1). The clamping plate (41) is located inside the clamping groove (21). The clamping module (2) is provided with a through hole (25) corresponding to the pressure rod (42). The inner end of the pressure rod (42) extends into the through hole (25) to apply a squeezing force to the clamping plate (41) toward the inside of the clamping groove (21).

8. The multi-functional fixture of claim 7, wherein The clamping plate (41) is provided with a connecting tube (411) extending into the through hole (25), and the inner end of the pressure rod (42) can extend into the connecting tube (411).

9. The multi-functional fixture of claim 8, wherein, The inner end of the pressure rod (42) is provided with a first annular groove (422), and a snap ring (423) is provided in the first annular groove (422). The inner wall of the connecting pipe (411) is provided with a second annular groove (412), and at least a portion of the snap ring (423) is located in the second annular groove (412).

10. The multi-functional fixture of claim 9, wherein The snap ring (423) has a deformation notch (424), and the distance between the deformation notch (424) and the two opening walls can change elastically.

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