Auxiliary device for tensile test of vulcanized rubber dumbbell sample

Abstract

The utility model relates to the technical field of vulcanized rubber production, in particular to an auxiliary device for a vulcanized rubber dumbbell sample tensile test, which comprises a mounting seat, limit blocks are mounted on two sides of the top of the mounting seat, the limit blocks are isosceles trapezoid blocks, and wide sides of the limit blocks correspond to the edge of the mounting seat. Clamping mechanisms are arranged on the sides, close to each other, of the two limiting blocks; a cover plate is hinged to the side, away from the other limiting block, of the top of one limiting block, scale marks are arranged on the top face of the cover plate, the other side of the cover plate is fixed to the other limiting block through a lock catch, and a rectangular groove is formed in the middle of the cover plate. When the auxiliary device for the tensile test of the vulcanized rubber dumbbell sample is used, the sample arranged between the limiting blocks is pressed and fixed through downward pressing of the cover plate, line drawing operation on the sample is achieved through linear sliding of the paintbrush, it is guaranteed that the drawn lines cannot be distorted and irregular, and follow-up comparison and calculation are avoided.

Description

Technical Field

[0001] This utility model relates to the field of vulcanized rubber production technology, and in particular to an auxiliary device for tensile testing of vulcanized rubber dumbbell specimens. Background Technology

[0002] The dumbbell tensile test of vulcanized rubber is an important test method for evaluating the mechanical properties of vulcanized rubber materials. It involves preparing the vulcanized rubber into dumbbell-shaped specimens according to standard requirements, and then conducting a tensile test on the vulcanized rubber specimens using a universal testing machine.

[0003] Before conducting the test, a line needs to be scribed at the center of the specimen to compare the tensile performance. This allows for comparison of the fracture point with the center, facilitating subsequent calculations. However, existing scribers mostly use manual scribing with a ruler, and the soft texture of vulcanized rubber easily causes irregular distortion of the scribe lines. Therefore, we propose an auxiliary device for tensile testing of vulcanized rubber dumbbell specimens to address this problem. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by proposing an auxiliary device for tensile testing of vulcanized rubber dumbbell specimens.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an auxiliary device for tensile testing of vulcanized rubber dumbbell specimens is designed, including a mounting base, and limit blocks are installed on both sides of the top of the mounting base. The limit blocks are isosceles trapezoidal blocks with their wide sides facing the edge of the mounting base. A clamping mechanism is provided on the side of the two limit blocks that are relatively close to each other.

[0006] A cover plate is hinged to the top of one of the limiting blocks on the side away from the other limiting block. The top surface of the cover plate is provided with scale lines. The other side of the cover plate is fixed to the other limiting block by a latch. A rectangular groove is opened in the middle of the cover plate. Slide rails are installed on both sides of the rectangular groove. A strip plate is provided between the two slide rails. The end of the strip plate is connected to a first slider. The first slider is slidably installed on the slide rail.

[0007] A strip-shaped groove is provided on the strip plate, a second slider is slidably installed in the groove, and a paintbrush is installed on the second slider.

[0008] Preferably, a connecting plate is installed on the top of one of the first sliders, and a locking bolt is threaded onto the connecting plate, the end of the locking bolt corresponding to the top surface of the cover plate.

[0009] Preferably, a cavity is provided on the side of the two limiting blocks that are relatively far apart. The clamping mechanism includes two clamping plates that are arranged opposite each other. The clamping plates are located between the two limiting blocks. A screw is vertically installed in the middle of the side of the two clamping plates that are relatively far apart. The other end of the screw passes through the limiting block and is threadedly connected to the limiting block.

[0010] Preferably, a handle is installed on the end of the screw away from the clamp.

[0011] Preferably, a guide shaft is provided parallel to the side of the screw, one end of the guide shaft is fixed to the clamping plate, and the other end of the guide shaft slides through the limiting block.

[0012] Preferably, a through groove is provided in the middle of the second slider, the pen is placed in the through groove, and the pen is in clearance fit with the inner wall of the through groove.

[0013] Preferably, mounting holes are provided at all corners of the mounting base.

[0014] The design scheme proposed in this utility model has the following beneficial effects in application:

[0015] 1. The auxiliary device for tensile testing of vulcanized rubber dumbbell specimens uses the pressing of the cover plate to clamp and fix the specimen placed between the limiting blocks, and relies on the straight sliding of the pen to achieve the drawing operation on the specimen, ensuring that the drawn lines will not be distorted or irregular, thus avoiding subsequent comparison and calculation.

[0016] 2. The auxiliary device for tensile testing of vulcanized rubber dumbbell specimens ensures the stability and firmness of the specimen on the mounting base by using clamps to press the specimen on both sides, in conjunction with the pressing of the cover plate, thus ensuring the stability of the scribing operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0019] Figure 3 This is a top view of the present invention;

[0020] Figure 4 This is a diagram illustrating the effect of using this utility model.

[0021] In the diagram: 1. Mounting base; 2. Limiting block; 3. Cavity; 4. Clamping plate; 5. Screw; 6. Guide shaft; 7. Cover plate; 8. Rectangular groove; 9. Slide rail; 10. Strip plate; 11. First slider; 12. Slide groove; 13. Second slider; 14. Pen; 15. Mounting hole; 16. Connecting plate; 17. Locking bolt. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figures 1-4 An auxiliary device for tensile testing of vulcanized rubber dumbbell specimens includes a mounting base 1, with mounting holes 15 at each corner of the mounting base 1. During use, bolts can be passed through the mounting holes 15 to fix the mounting base 1 in place.

[0024] like Figure 1 and Figure 2 As shown, limit blocks 2 are installed on both sides of the top of the mounting base 1. The limit blocks 2 are isosceles trapezoidal blocks with their wide sides facing the edge of the mounting base 1. A clamping mechanism is provided on the side where the two limit blocks 2 are relatively close. A cavity 3 is provided on the side where the two limit blocks 2 are relatively far apart. The clamping mechanism includes two opposing clamping plates 4, which are located between the two limit blocks 2. A screw 5 is vertically installed in the middle of the side where the two clamping plates 4 are relatively far apart. The other end of the screw 5 passes through the limit block 2 and is threadedly connected to the limit block 2. A cover plate 7 is hinged to the top of one of the limit blocks 2 on the side away from the other limit block 2. A scale line is provided on the top surface of the cover plate 7. The other side of the cover plate 7 is fixed to the other limit block 2 by a latch. A rectangular groove 8 is provided in the middle of the cover plate 7.

[0025] Specifically, during the experiment, a dumbbell-shaped sample (such as...) is taken... Figure 4 The position indicated by the middle arrow A is placed on the mounting base 1. Then, a handle is installed on the end of the screw 5 away from the clamping plate 4. The handle can be rotated to rotate the screw 5, thereby causing the two clamping plates 4 to move relative to each other and clamp and fix the sample. Then, the cover plate 7 is closed and placed on the limiting block 2 and locked. In this way, after the cover plate 7 is pressed down, the sample can be completely tightened and squeezed, and its own deformation ability keeps it in a tensioned state. This reduces the probability of the sample deforming and twisting when subjected to other external forces.

[0026] Furthermore, a guide shaft 6 is provided parallel to the side of the screw 5. One end of the guide shaft 6 is fixed to the clamping plate 4, and the other end of the guide shaft 6 slides through the limiting block 2.

[0027] After the sample is fixed, slide rails 9 are installed on both sides of the rectangular groove 8, and a strip plate 10 is provided between the two slide rails 9. A first slider 11 is connected to the end of the strip plate 10. The first slider 11 is slidably mounted on the slide rail 9. A strip-shaped groove 12 is opened on the strip plate 10, and a second slider 13 is slidably mounted in the groove 12. A paintbrush 14 is installed on the second slider 13. A through groove is opened in the middle of the second slider 13, and the paintbrush 14 is placed in the through groove, with the paintbrush 14 and the inner wall of the through groove being flush. With the clearance fit, the drawing position can be determined first according to the scale line, and the pen 14 can be moved to the corresponding position. Then, since a connecting plate 16 is installed on the top of one of the first sliders 11, and a locking bolt 17 is threaded on the connecting plate 16, the end of the locking bolt 17 corresponds to the top surface of the cover plate 7. The locking bolt 17 can be turned to fix the strip plate 10. Then, hold the pen 14 and let it slide along the slide groove 12 to complete the drawing operation. Under the limit of the slide groove 12, the straightness of the drawn line is guaranteed.

[0028] Finally, the tensile test can be performed by clamping the two ends of the specimen with a clamp and pulling it.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An auxiliary device for tensile testing of vulcanized rubber dumbbell specimens, characterized in that: Includes a mounting base (1), and limit blocks (2) are installed on both sides of the top of the mounting base (1). The limit blocks (2) are isosceles trapezoidal blocks with their wide sides facing the edge of the mounting base (1). A clamping mechanism is provided on the side where the two limit blocks (2) are relatively close to each other. A cover plate (7) is hinged to the top of one of the limiting blocks (2) on the side away from the other limiting block (2). A scale line is provided on the top surface of the cover plate (7). The other side of the cover plate (7) is fixed to the other limiting block (2) by a buckle. A rectangular groove (8) is provided in the middle of the cover plate (7). Slide rails (9) are installed on both sides of the rectangular groove (8). A strip plate (10) is provided between the two slide rails (9). The end of the strip plate (10) is connected to a first slider (11). The first slider (11) is slidably installed on the slide rail (9). A strip-shaped groove (12) is provided on the strip plate (10), a second slider (13) is slidably installed in the groove (12), and a paintbrush (14) is installed on the second slider (13).

2. The auxiliary device for tensile testing of vulcanized rubber dumbbell specimens according to claim 1, characterized in that: A connecting plate (16) is installed on the top of one of the first sliders (11), and a locking bolt (17) is threaded onto the connecting plate (16), with the end of the locking bolt (17) corresponding to the top surface of the cover plate (7).

3. The auxiliary device for tensile testing of vulcanized rubber dumbbell specimens according to claim 1, characterized in that: A cavity (3) is provided on the side of the two limiting blocks (2) that are relatively far apart. The clamping mechanism includes two clamping plates (4) that are arranged opposite each other. The clamping plates (4) are located between the two limiting blocks (2). A screw (5) is vertically installed in the middle of the side of the two clamping plates (4) that are relatively far apart. The other end of the screw (5) passes through the limiting block (2) and the screw (5) is threadedly connected to the limiting block (2).

4. The auxiliary device for tensile testing of vulcanized rubber dumbbell specimens according to claim 3, characterized in that: A handle is installed on the end of the screw (5) away from the clamp (4).

5. The auxiliary device for tensile testing of vulcanized rubber dumbbell specimens according to claim 3, characterized in that: A guide shaft (6) is provided parallel to the side of the screw (5). One end of the guide shaft (6) is fixed on the clamping plate (4), and the other end of the guide shaft (6) slides through the limiting block (2).

6. The auxiliary device for tensile testing of vulcanized rubber dumbbell specimens according to claim 1, characterized in that: A through groove is provided in the middle of the second slider (13), and the pen (14) is placed in the through groove, with the pen (14) and the inner wall of the through groove in a clearance fit.

7. The auxiliary device for tensile testing of vulcanized rubber dumbbell specimens according to claim 1, characterized in that: Mounting holes (15) are provided at the corners of the mounting base (1).

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