Rapid clamping mechanism for expansive high polymer test piece

Abstract

The utility model relates to the technical field of clamping mechanisms, in particular to an expansion type high polymer test piece rapid clamping mechanism which comprises a bottom plate, a first screw rod, a second screw rod, a bracket and two pressing plates, long-strip-shaped holes are formed in the middles of the pressing plates, through holes are formed in the two ends of the bottom plate, and the middle of the bracket is rotatably connected with the middle of the bottom plate. The first screw rod and the second screw rod sequentially penetrate through the long-strip-shaped hole and the through hole from top to bottom, the top of the first screw rod and the top of the second screw rod are in threaded connection with a first nut and a second nut respectively, the bottoms of the first screw rod and the second screw rod are connected with the two ends of the bracket respectively, and the first screw rod and the second screw rod are each sleeved with a spring. When a test piece needs to be pressed, the first nut is rotated, the pressing plates on the two sides can be pressed downwards to generate enough pressure, so that the stability of the test piece in the clamping process is ensured, the structure is simple and effective, the clamping device can adapt to test pieces of different sizes and shapes, and the clamping efficiency and stability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of clamping mechanisms, in particular to a rapid clamping mechanism for expanded polymer specimens. Background Art

[0002] Polyurethane-based polymer grouting materials with self-expansion characteristics (hereinafter referred to as polymers for short) are materials that can rapidly expand after reaction and have a certain adhesive force and strength. In recent years, expanded polymers and their high-pressure injection technologies have developed rapidly internationally. In the field of geotechnical engineering, expanded polymer materials are widely used because of their characteristics such as fast reaction, high expansibility, and good durability. The research on the strength, deformation characteristics, expansion force measurement and other properties of expanded polymers is of great significance for deeply understanding the reinforcement mechanism and comprehensive strength of expanded polymer materials. However, since the expanded polymers expand freely after reaction, their shapes are often complex after the reaction, their solid surfaces are uneven, and there are few complete planes. It is difficult to achieve the purpose of clamping expanded polymers with existing traditional clamps, resulting in great limitations in the related measurements, processing, etc. of expanded polymers. Content of the Utility Model

[0003] The utility model aims to solve at least the technical problems existing in the prior art. For this reason, the utility model provides a rapid clamping mechanism for expanded polymer specimens, which can effectively fix specimens with complex shapes, and when an external force is applied, the force can be evenly distributed, and the clamping effect is good.

[0004] A rapid clamping mechanism for expanded polymer specimens according to some embodiments of the utility model includes a bottom plate, a first screw rod, a second screw rod, a bracket, and two pressing plates. Connecting columns are arranged at both ends of the top of the bottom plate, and one ends of the two pressing plates are rotatably connected to the tops of the two connecting columns respectively. Long strip holes are formed in the middle parts of the pressing plates, through holes are formed at both ends of the bottom plate, the bracket is located below the bottom plate, and the middle part of the bracket is rotatably connected to the middle part of the bottom plate. The first screw rod and the second screw rod are sequentially passed through the long strip holes and the through holes from top to bottom. A first nut is threadedly connected to the top of the first screw rod, and the bottom of the first screw rod is rotatably connected to one end of the bracket. A second nut is threadedly connected to the top of the second screw rod, and the bottom of the second screw rod is rotatably connected to the other end of the bracket. Springs are sleeved on both the first screw rod and the second screw rod, and the upper and lower ends of the springs are respectively connected to the bottom of the pressing plate and the top of the bottom plate.

[0005] A rapid clamping mechanism for expanded polymer specimens according to some embodiments of the utility model has at least the following beneficial effects:

[0006] The utility model realizes the effective clamping of specimens with irregular shapes through the design of the first screw rod, the second screw rod, the bracket and the pressing plate. When it is necessary to press the specimen, rotate the first nut, and sufficient pressure can be generated by the downward pressing of the pressing plates on both sides through the lever principle, so as to ensure the stability of the specimen during the clamping process. When it is necessary to loosen the workpiece, just loosen the first nut, and the spring will play a role and lift the pressing plate. At this time, the operator can manually retract the pressing plate to loosen the specimen. The structure is simple and effective, can adapt to specimens of different sizes and shapes, and improves the clamping efficiency and stability.

[0007] According to an expansion-type high-polymer specimen rapid clamping mechanism of some embodiments of the present utility model, a connecting portion protrudes downward from the center of the bottom of the bottom plate, a first connecting groove is formed at the bottom of the connecting portion, the middle of the bracket extends into the first connecting groove, a first connecting hole is provided in a through manner on the connecting portion, the first connecting hole communicates with the first connecting groove, a second connecting hole is provided in the middle of the bracket, and a first pin is inserted between the first connecting hole and the second connecting hole.

[0008] According to an expansion-type high-polymer specimen rapid clamping mechanism of some embodiments of the present utility model, second connecting grooves are respectively formed at both ends of the bracket, third connecting holes are respectively provided in a through manner on the second connecting grooves, the third connecting holes communicate with the second connecting grooves, fourth connecting holes are respectively formed at the bottoms of the first screw rod and the second screw rod, and a second pin is inserted between the third connecting hole and the fourth connecting hole.

[0009] According to an expansion-type high-polymer specimen rapid clamping mechanism of some embodiments of the present utility model, gaskets are respectively arranged at the bottoms of the long holes, and the tops of the springs are respectively connected with the gaskets.

[0010] According to an expansion-type high-polymer specimen rapid clamping mechanism of some embodiments of the present utility model, both the first nut and the second nut adopt shoulder nuts.

[0011] According to an expansion-type high-polymer specimen rapid clamping mechanism of some embodiments of the present utility model, inclined surfaces are respectively arranged at one ends of the pressing plates close to the center of the bottom plate.

[0012] According to an expansion-type high-polymer specimen rapid clamping mechanism of some embodiments of the present utility model, a groove is formed at the center of the top of the bottom plate, and the groove is V-shaped.

[0013] According to an expansion-type high-polymer specimen rapid clamping mechanism of some embodiments of the present utility model, fifth connecting holes are respectively formed at the tops of the connecting columns, third connecting grooves are respectively formed at the bottoms of the pressing plates, rotating shafts are respectively arranged in the third connecting grooves, and the rotating shafts are inserted through the fifth connecting holes.

[0014] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0016] Figure 1 is a schematic structural diagram of an embodiment of the present utility model Figure 1 。

[0017] Figure 2 is a schematic structural diagram of an embodiment of the present utility model Figure 2 。

[0018] Figure 3 is a schematic structural diagram of the bottom plate of an embodiment of the present utility model.

[0019] Figure 4 is a schematic structural diagram of the bracket of an embodiment of the present utility model.

[0020] Figure 5 is a schematic structural diagram of the first screw or the second screw of an embodiment of the present utility model.

[0021] Reference numerals: 1, bottom plate; 2, first screw; 3, second screw; 4, bracket; 5, pressing plate; 6, connecting column; 7, long slot; 8, through hole; 9, first nut; 10, second nut; 11, spring; 12, connecting portion; 13, first connecting groove; 14, first connecting hole; 15, second connecting hole; 16, first pin; 17, second connecting groove; 18, third connecting hole; 19, fourth connecting hole; 20, second pin; 21, gasket; 22, inclined surface; 23, groove; 24, third connecting groove; 25, rotating shaft; 100, test piece. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and should not be construed as limiting the present utility model.

[0023] In the description of the present utility model, it should be understood that regarding the orientation description, such as the orientation or positional relationship indicated by up, down, left, right, front, rear, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the referred module or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0024] In the description of the present utility model, if the first and the second are described only for the purpose of distinguishing technical features, it should not be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features or implicitly specifying the sequence relationship of the indicated technical features.

[0025] In the description of the present utility model, unless otherwise clearly defined, terms such as setting, installation, connection, etc. should be understood in a broad sense. Those skilled in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0026] As Figures 1 - 5 shown, an embodiment of the present utility model provides a rapid clamping mechanism for an expandable high-polymer specimen.

[0027] A rapid clamping mechanism for an expandable high-polymer specimen includes a bottom plate 1, a first screw 2, a second screw 3, a bracket 4, and two pressing plates 5. Connecting columns 6 are provided at both ends of the top of the bottom plate 1. The tops of the two connecting columns 6 are respectively rotatably connected to one ends of the two pressing plates 5. Long strip holes 7 are formed in the middle of the pressing plates 5. Through holes 8 are formed at both ends of the bottom plate 1. The bracket 4 is located below the bottom plate 1. The middle of the bracket 4 is rotatably connected to the middle of the bottom plate 1. The first screw 2 and the second screw 3 are sequentially passed through the long strip holes 7 and the through holes 8 from top to bottom. A first nut 9 is threadedly connected to the top of the first screw 2. The bottom of the first screw 2 is rotatably connected to one end of the bracket 4. A second nut 10 is threadedly connected to the top of the second screw 3. The bottom of the second screw 3 is rotatably connected to the other end of the bracket 4. Springs 11 are sleeved on both the first screw 2 and the second screw 3. The upper and lower ends of the springs 11 are respectively connected to the bottom of the pressing plates 5 and the top of the bottom plate 1.

[0028] Through the design of the first screw rod 2, the second screw rod 3, the bracket 4 and the pressing plate 5, the utility model realizes the effective clamping of the test piece 100 with irregular shape. When it is necessary to press the test piece 100, tighten the first nut 9 and the second nut 10, which can make the pressing plate 5 generate sufficient pressure, so as to ensure the stability of the test piece 100 during the clamping process. When it is necessary to loosen the test piece, just loosen the first nut 9 or the second nut 10, and the spring 11 will play a role and lift the pressing plate 5. At this time, the operator can manually retract the pressing plate 5 to loosen the test piece 100. The structure is simple and effective, can adapt to test pieces 100 with different sizes and shapes, and improves the clamping efficiency and stability.

[0029] The pressing method of the utility model is specifically as follows: Rotate the first nut 9. Since the first nut 9 is threadedly connected with the first screw rod 2, the first nut 9 will first move downward along the first screw rod 2, driving the pressing plate 5 to press down. When pressing the test piece 100, rotate the first nut 9 again. At this time, the first nut 9 cannot continue to move downward, and the first screw rod 2 will move upward along the through hole 8 and the long hole 7. Since the bottom of the first screw rod 2 is connected to one end of the bracket 4, the first screw rod 2 will drive one end of the bracket 4 to lift upward, and the other end of the bracket 4 will drive the second screw rod 3 to move downward. Therefore, the second nut 10 at the top of the second screw rod 3 will also drive the other pressing plate 5 to press down, pressing the other side of the test piece 100. When the first nut 9 is locked, the two pressing plates 5 will also completely press the test piece 100. This pressing method realizes the downward pressing of the pressing plate 5 based on the lever principle, and the operation is convenient, simple and fast.

[0030] For the rapid clamping mechanism of the expanded polymer test piece described in this embodiment, a connecting portion 12 protrudes downward from the center of the bottom of the bottom plate 1. A first connecting groove 13 is opened at the bottom of the connecting portion 12. The middle of the bracket 4 extends into the first connecting groove 13. A first connecting hole 14 is provided in a penetrating manner on the connecting portion 12. The first connecting hole 14 communicates with the first connecting groove 13. A second connecting hole 15 is provided in the middle of the bracket 4. A first pin 16 is inserted between the first connecting hole 14 and the second connecting hole 15. Specifically, through the cooperation of the connecting portion 12 at the center of the bottom of the bottom plate 1 and the middle of the bracket 4, the rotatable connection of the bracket 4 relative to the bottom plate 1 is realized. As a connecting piece, the first pin 16 is not only convenient for disassembly and assembly, but also ensures the reliable connection between the bracket 4 and the bottom plate 1, enhancing the flexibility and adaptability of the overall mechanism.

[0031] It can be understood that the second screw rod 3 is threadedly connected with the second nut 10, and the position of the pressing plate can also be further adjusted through the second nut 10.

[0032] A rapid clamping mechanism for an expandable polymer specimen described in this example. At both ends of the bracket 4, second connection grooves 17 are provided. A third connection hole 18 is provided in a through manner on each of the second connection grooves 17. The third connection hole 18 communicates with the second connection groove 17. Fourth connection holes 19 are provided at the bottoms of the first screw 2 and the second screw 3. A second pin 20 is inserted between the third connection hole 18 and the fourth connection hole 19. Specifically, since lateral displacement will occur when the pressing plate 5 is pressed down, the second connection grooves 17 at both ends of the bracket 4 are connected to the fourth connection holes 19 at the bottoms of the first screw 2 and the second screw 3 through the second pin 20. This design allows for a certain range of rotation between the first screw 2 and the second screw 3 and the bracket 4, so as to adapt to the displacement generated when the pressing plate 5 is pressed down. The use of pins simplifies the assembly process and facilitates the maintenance and replacement of components.

[0033] A rapid clamping mechanism for an expandable polymer specimen described in this example. Gaskets 21 are provided at the bottoms of the long slots 7. The tops of the springs 11 are connected to the gaskets 21. Specifically, the presence of the gaskets 21 can help disperse the pressure and reduce damage to the pressing plate 5.

[0034] A rapid clamping mechanism for an expandable polymer specimen described in this example. The first nut 9 and the second nut 10 both use shoulder nuts. Specifically, using shoulder nuts as the first nut 9 and the second nut 10 can increase the contact area with the pressing plate 5, reduce the local pressure, and effectively prevent the nuts from damaging the surface of the pressing plate 5 during the tightening process.

[0035] A rapid clamping mechanism for an expandable polymer specimen described in this example. At one end of the pressing plate 5 close to the center of the bottom plate 1, inclined surfaces 22 are provided. Specifically, the design of the inclined surfaces 22 at one end of the pressing plate 5 close to the center of the bottom plate 1 helps to apply force to the specimen 100, especially when dealing with specimens 100 with irregular shapes. The design of the inclined surfaces 22 can be adaptively adjusted according to the different shapes and sizes of the specimens 100, effectively enabling the clamping mechanism to achieve a good fixing effect under different working conditions, reducing the operation difficulty. At the same time, the inclined surfaces 22 can also help disperse the pressure and avoid damage to the specimen 100 caused by excessive local force.

[0036] As Figures 1 - 3 shown, a rapid clamping mechanism for an expandable polymer specimen described in this example. A groove 23 is provided at the center of the top of the bottom plate 1. The groove 23 is V-shaped. Specifically, the V-shaped groove 23 at the center of the top of the bottom plate 1 provides a preliminary positioning function for the specimen 100. Especially for specimens 100 with sharp corners, edges or cylindrical shapes, the V-shaped groove 23 can help quickly align the specimen 100 and improve work efficiency. In addition, the V-shaped design is also beneficial for fixing slender specimens 100 and preventing them from slipping sideways.

[0037] A rapid clamping mechanism for an intumescent polymer specimen described in this example. Fifth connection holes (not shown) are provided at the tops of the connecting columns 6. Third connection grooves 24 are provided at the bottoms of the pressing plates 5. Rotating shafts 25 are arranged in the third connection grooves 24, and the rotating shafts 25 penetrate through the fifth connection holes. Specifically, the above settings enable the pressing plates 5 to rotate freely within a certain range to adapt to the changes in the surface of the specimen 100. The use of the rotating shafts 24 not only ensures the stability of the connection but also provides sufficient flexibility for clamping specimens 100 of various shapes.

[0038] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A rapid clamping mechanism for an intumescent polymer specimen, characterized in that: It includes a bottom plate, a first screw rod, a second screw rod, a bracket and two pressing plates. Connection columns are provided at both ends of the top of the bottom plate. The tops of the two connection columns are rotatably connected to one end of the two pressing plates respectively. Long strip holes are formed in the middle of the pressing plates. Through holes are formed at both ends of the bottom plate. The bracket is located below the bottom plate. The middle of the bracket is rotatably connected to the middle of the bottom plate. The first screw rod and the second screw rod are sequentially passed through the long strip holes and the through holes from top to bottom. A first nut is threadedly connected to the top of the first screw rod. The bottom of the first screw rod is rotatably connected to one end of the bracket. A second nut is threadedly connected to the top of the second screw rod. The bottom of the second screw rod is rotatably connected to the other end of the bracket. Springs are sleeved on both the first screw rod and the second screw rod. The upper and lower ends of the springs are respectively connected to the bottom of the pressing plates and the top of the bottom plate.

2. The rapid clamping mechanism for an intumescent polymer specimen according to claim 1, wherein: A connection portion protrudes downward from the center of the bottom of the bottom plate. A first connection groove is formed at the bottom of the connection portion. The middle of the bracket extends into the first connection groove. A first connection hole is formed in a through manner on the connection portion. The first connection hole communicates with the first connection groove. A second connection hole is provided in the middle of the bracket. A first pin is passed through between the first connection hole and the second connection hole.

3. The rapid clamping mechanism for an expandable polymer specimen according to claim 1, characterized in that: Second connection grooves are formed at both ends of the bracket. Third connection holes are formed in a through manner on the second connection grooves. The third connection holes communicate with the second connection grooves. Fourth connection holes are formed at the bottoms of both the first screw rod and the second screw rod. A second pin is passed through between the third connection hole and the fourth connection hole.

4. The rapid clamping mechanism for an intumescent polymer specimen according to claim 1, characterized in that: Gaskets are provided at the bottoms of the long strip holes. The tops of the springs are connected to the gaskets.

5. The rapid clamping mechanism for an expandable polymer specimen according to claim 1, characterized in that: Both the first nut and the second nut are shoulder nuts.

6. The rapid clamping mechanism for an expandable polymer specimen according to claim 1, wherein: One end of each pressing plate close to the center of the bottom plate is provided with an inclined surface.

7. A rapid clamping mechanism for an expandable polymer specimen according to claim 1, characterized in that: A groove is formed at the center of the top of the bottom plate. The groove is V-shaped.

8. The rapid clamping mechanism for an expandable polymer specimen according to claim 1, characterized in that: Fifth connection holes are formed at the tops of the connection columns. Third connection grooves are formed at the bottoms of the pressing plates. Rotating shafts are provided in the third connection grooves. The rotating shafts are passed through the fifth connection holes.

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