A rubber performance testing apparatus

Abstract

The application is suitable for the technical field of rubber testing, and provides a rubber performance testing device, which comprises a base, two symmetrically distributed support seats are arranged on the upper end of the base, a guide mechanism is arranged below each support seat, the guide mechanism is used for guiding the support seat, a stretching mechanism is installed on each side of the base, the stretching mechanism is connected with the support seat on the same side and is used for pulling the support seat. A support is fixedly installed on each support seat, a clamping mechanism is installed on each support, the clamping mechanism is connected with the support, the support is guided through the setting of an inclined block, when a first servo motor drives a first rotating shaft to rotate, the inclined block rotates around the first rotating shaft, the inclination direction of the inclined surface of the inclined block can be adjusted, so that the support is guided to different directions, the shear deformation when the tire side slips or the complex stress of the pipeline interface can be simulated by adjusting the stretching direction, the failure mechanism of the material under the real working condition is revealed, and the overestimation of the material durability caused by the one-way test is avoided.

Description

Technical Field

[0001] This invention belongs to the field of rubber testing technology, and in particular relates to a rubber performance testing device. Background Technology

[0002] Modified nitrile butadiene rubber (NBR) is a type of vulcanized rubber with excellent oil resistance, high and low temperature resistance, and good mechanical properties, making it widely used. Rubber performance testing equipment is diverse, and can be categorized into equipment for testing the processing properties of unvulcanized rubber and equipment for testing the properties of vulcanized rubber, based on the test items. Current methods focus on testing the rubber properties of nitrile butadiene rubber with high temperature resistance and low compression set. For example, tensile property testing equipment applies tensile force to the rubber and observes and records the deformation and recovery of the rubber material after deformation.

[0003] For example, the existing rubber tensile testing machine with publication number CN206563677U specifically discloses a support frame, a working area and a power distribution device on the support frame, a liftable main panel on the working area, a workpiece placement mold on the main panel for placing the test workpiece, a metal sensor on the workpiece placement mold, an operating platform above the main panel, an opening on the operating platform corresponding to the position of the workpiece placement mold for the workpiece to pass through, a replaceable resistance structure inside the opening, and a reflector on the upper side of the operating platform for observing the reverse side of the workpiece; the power distribution device includes a touch screen for observing test data, and the data detected by the metal sensor is transmitted to the touch screen. This utility model has the characteristics of simple operation and convenient observation.

[0004] Existing rubber tensile property testing equipment cannot apply oblique tensile force to rubber materials. Rubber products often experience multi-directional stresses in actual use (such as lateral shear in tires and complex deformation of seals). Oblique tensile force testing can simulate these complex stress scenarios. However, the equipment only supports unidirectional tension, and the test results will deviate from actual working conditions, leading to distorted material performance evaluation. This may mask potential structural defects and affect the safety and reliability of the product. To solve the above problems, we propose a rubber performance testing device. Summary of the Invention

[0005] This invention provides a rubber performance testing device, which aims to solve the problem that current rubber tensile performance testing devices cannot apply oblique tensile force to rubber materials.

[0006] The present invention is implemented as follows: a rubber performance testing device includes a base, two symmetrically distributed support seats are provided on the upper end of the base, and a guide mechanism is provided below each support seat for guiding the support seat. A tensioning mechanism is installed on both sides of the base, and the tensioning mechanism is connected to the support seat on the same side and is used to pull the support seat.

[0007] Each support base is fixedly equipped with a bracket, and each bracket is equipped with a clamping mechanism. The clamping mechanism is connected to the support base and is used to fix the rubber material on the support base. A controller is installed on the base.

[0008] Preferably, the guiding mechanism includes two side plates fixedly installed on the base, the two side plates being disposed on both sides of the support seat, the bottom of the support seat being provided with an inclined surface, and a first rotating shaft being rotatably installed between the two side plates, with inclined blocks fixedly installed at both ends of the first rotating shaft, the inclined surface on the inclined block contacting the inclined surface at the bottom of the support seat.

[0009] Preferably, a first servo motor is fixedly mounted on the side plate located on one side, the output shaft of the first servo motor is fixedly connected to a first rotating shaft, the first servo motor is electrically connected to a controller, and the controller is used to control the operation of the first servo motor.

[0010] Preferably, the stretching mechanism includes a support plate fixedly mounted on a base, a second servo motor fixedly mounted on the support plate, a winding wheel fixedly mounted on the output shaft end of the second servo motor, a rope fixedly connected inside the winding wheel, one end of the rope fixedly connected to a support seat on the same side thereon, and the second servo motor electrically connected to a controller, the controller being used to control the operation of the second servo motor.

[0011] Preferably, the upper surface of the support base is provided with anti-slip texture.

[0012] Preferably, the clamping mechanism includes a second rotating shaft, which is rotatably mounted through the bracket. Both ends of the second rotating shaft are provided with first splines, and both ends of the second rotating shaft are provided with eccentric pressure rollers. Each eccentric pressure roller has a spline groove inside. The end of the second rotating shaft is inserted into the eccentric pressure roller and is splinedly connected to it. An eccentric shaft is fixedly mounted at the other end of each eccentric pressure roller, located at the eccentric position of the roller. A second spline is provided on the eccentric shaft. Support blocks are fixedly mounted at both ends of the support base, and inner spline sleeves are rotatably mounted on each support block. One end of the eccentric shaft is inserted into the inner spline sleeve and splinedly connected to it. A drive assembly is mounted on one side of the support base, connected to the inner spline sleeve and used to drive the two eccentric pressure rollers to rotate synchronously.

[0013] Preferably, the surface of the eccentric pressure roller is provided with an anti-slip texture.

[0014] Preferably, the drive assembly includes a third servo motor, which is fixedly mounted on one side of the support base. A connecting shaft is rotatably mounted on the support block located on one side. The connecting shaft is fixedly connected to an inner spline sleeve. A synchronous belt mechanism is mounted on the output shaft of the third servo motor and the connecting shaft. The third servo motor drives the connecting shaft to rotate synchronously through the synchronous belt mechanism.

[0015] Preferably, the bracket is equipped with an adjustment mechanism, which is connected to the eccentric pressure rollers on both sides, and the adjustment mechanism is used to adjust the distance between the two eccentric pressure rollers.

[0016] Preferably, the adjusting mechanism includes two connecting plates. Each eccentric pressure roller is fitted with a connecting plate and rotatably mounted thereon. The upper end of the connecting plate is protruding. A bidirectional lead screw is rotatably mounted through the bracket. The two ends of the bidirectional lead screw pass through the connecting plates on both sides respectively. The bidirectional lead screw is threadedly connected to the connecting plates. Limiting plates are fixedly installed at both ends of the bidirectional lead screw.

[0017] Compared with related technologies, the rubber performance testing equipment provided by this invention has the following advantages:

[0018] By setting up a wedge to guide the support base, when the first servo motor drives the first rotating shaft to rotate, the wedge rotates around the first rotating shaft. The tilt direction of the wedge can be adjusted, thereby guiding the support base to different directions. By pulling the support bases on both sides away from each other, the rubber material on the support bases can be pulled to both sides to perform a tensile test on the rubber material. At the same time, the tensile direction of the rubber material can be adjusted.

[0019] By adjusting the stretching direction, the shear deformation of a tire during sideslip or the combined stress of a pipe joint can be simulated, revealing the failure mechanism of the material under real working conditions and avoiding the overestimation of material durability by unidirectional testing.

[0020] By adjusting the distance between the eccentric pressure roller 15 and the support base 2, the device can fix rubber materials of different thicknesses. It can also adjust the distance between the two eccentric pressure rollers 15 to fix rubber materials of different widths. By testing various specifications of rubber materials with this equipment, researchers can obtain more comprehensive and accurate stress-strain curves, gaining a deeper understanding of key mechanical parameters such as elastic modulus, yield strength, and elongation at break under different dimensions, providing reliable data support for the development of new materials. Attached Figure Description

[0021] Figure 1 This is a schematic diagram illustrating the operation of the present invention;

[0022] Figure 2 This is a partial structural schematic diagram of the present invention;

[0023] Figure 3 This is an enlarged schematic diagram of a portion of the structure at the support base in this invention;

[0024] Figure 4 This is a partial enlarged schematic diagram of the eccentric pressure roller in this invention;

[0025] Figure 5 For the present invention Figure 2 Enlarged diagram of point A in the diagram;

[0026] Figure 6 This is an enlarged schematic diagram of a portion of the structure at the inclined block in this invention;

[0027] Figure 7 This is a schematic diagram of the cooperation between the support base and the inclined block in this invention.

[0028] In the diagram: 1. Base; 2. Support seat; 3. Bracket; 4. Side plate; 5. First rotating shaft; 6. Inclined block; 7. First servo motor; 8. Controller; 9. Support plate; 10. Second servo motor; 11. Winding wheel; 12. Rope; 13. Second rotating shaft; 14. First spline; 15. Eccentric pressure roller; 16. Eccentric shaft; 17. Second spline; 18. Support block; 19. Inner spline sleeve; 20. Third servo motor; 21. Connecting shaft; 22. Synchronous belt mechanism; 23. Connecting piece; 24. Bidirectional lead screw; 25. Limiting piece. Detailed Implementation

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0030] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0031] A preferred embodiment of the rubber performance testing equipment provided by the present invention is as follows: Figures 1 to 7 As shown:

[0032] A rubber performance testing device includes a base 1, with two symmetrically distributed support seats 2 on the upper end of the base 1. A guide mechanism is provided below each support seat 2 to guide it. Tensioning mechanisms are installed on both sides of the base 1, connected to the support seat 2 on the same side and used to pull the support seat 2. A bracket 3 is fixedly installed on each support seat 2, and a clamping mechanism is installed on each bracket 3. The clamping mechanism is connected to the support seat 2 and used to fix the rubber material on the support seat 2. A controller 8 is installed on the base 1.

[0033] The guiding mechanism includes two side plates 4 fixedly mounted on the base 1, with the two side plates 4 positioned on either side of the support base 2. The support base 2 has an inclined surface at its bottom. A first rotating shaft 5 is rotatably mounted between the two side plates 4. Inclined blocks 6 are fixedly mounted at both ends of the first rotating shaft 5, with the inclined surfaces of the inclined blocks 6 contacting the inclined surfaces at the bottom of the support base 2. A first servo motor 7 is fixedly mounted on one of the side plates 4. The output shaft of the first servo motor 7 is fixedly connected to the first rotating shaft 5. The first servo motor 7 is electrically connected to a controller 8, which controls the operation of the first servo motor 7.

[0034] By setting the inclined block 6 to guide the support base 2, the support base 2 can move along the inclined surface of the inclined block 6. The side plates 4 on both sides limit the two sides of the support base 2, so that the support base 2 will not shift to the side. When the first servo motor 7 drives the first rotating shaft 5 to rotate, the inclined block 6 rotates around the first rotating shaft 5, which can adjust the tilt direction of the inclined surface of the inclined block 6, thereby guiding the support base 2 to different directions. With the self-locking operation of the first servo motor 7, the angle of the inclined block 6 can be kept stable.

[0035] The tensioning mechanism includes a support plate 9 fixedly installed on the base 1. A second servo motor 10 is fixedly installed on the support plate 9. A winding wheel 11 is fixedly installed on the output shaft end of the second servo motor 10. A rope 12 is fixedly connected inside the winding wheel 11. One end of the rope 12 is fixedly connected to the support seat 2 on the same side. The second servo motor 10 is electrically connected to the controller 8. The controller 8 is used to control the operation of the second servo motor 10.

[0036] The clamping mechanism includes a second rotating shaft 13, which is rotatably mounted on the bracket 3. Both ends of the second rotating shaft 13 are provided with first splines 14, and both ends of the second rotating shaft 13 are provided with eccentric pressure rollers 15. The eccentric pressure rollers 15 have spline grooves inside. The end of the second rotating shaft 13 is inserted into the eccentric pressure roller 15, and the second rotating shaft 13 is splinedly connected to the eccentric pressure roller 15. An eccentric shaft 16 is fixedly mounted on the other end of each eccentric pressure roller 15, and the eccentric shaft 16 is installed at the eccentric position of the eccentric pressure roller 15. A second spline 17 is provided on the eccentric shaft 16. Support blocks 18 are fixedly mounted on both ends of the support base 2, and inner spline sleeves 19 are rotatably mounted on each support block 18. One end of the eccentric shaft 16 is inserted into the inner spline sleeve 19, and the eccentric shaft 16 is splinedly connected to the inner spline sleeve 19. A drive assembly is mounted on one side of the support base 2, and the drive assembly is connected to the inner spline sleeve 19 and used to drive the two eccentric pressure rollers 15 to rotate synchronously. The drive assembly includes a third servo motor 20, which is fixedly mounted on one side of the support base 2. A connecting shaft 21 is rotatably mounted on the support block 18 on one side. The connecting shaft 21 is fixedly connected to the inner spline sleeve 19. A synchronous belt mechanism 22 is mounted on the output shaft of the third servo motor 20 and the connecting shaft 21. The third servo motor 20 drives the connecting shaft 21 to rotate synchronously through the synchronous belt mechanism 22.

[0037] A schematic diagram of the device's operation can be found here. Figure 1 As shown, the rubber material to be tested is placed on the support seats 2 on both sides. The inclination angle of the inclined plane of one side of the inclined block 6 is adjusted to a horizontal state, while the inclination angle of the inclined plane of the other side of the inclined block 6 is adjusted to a certain angle. The rubber material on the support seat 2 is fixed by setting a clamping mechanism.

[0038] The third servo motor 20 operates and drives the connecting shaft 21 to rotate synchronously through the synchronous belt mechanism 22. The connecting shaft 21 drives the inner spline sleeve 19 to rotate, the inner spline sleeve 19 drives the eccentric shaft 16 to rotate, the eccentric shaft 16 drives the eccentric pressure roller 15 to rotate, and the eccentric pressure roller 15 drives the second rotating shaft 13 to rotate, thereby driving the two eccentric pressure rollers 15 to rotate and press on the rubber material to be tested. Since the rotation angle of the eccentric pressure roller 15 is controllable, the distance between the eccentric pressure roller 15 and the support seat 2 is adjustable, and the device can fix rubber materials of different thicknesses.

[0039] Then, the second servo motor 10 drives the winding wheel 11 to rotate. The winding wheel 11 rotates and drives the rope 12 to be wound inside the winding wheel 11. The rope 12 can pull the support seat 2 to one side. The two support seats 2 move away from each other, which can pull the rubber material on the support seat 2 to both sides to perform a tensile test on the rubber material. At the same time, the tensile direction of the rubber material can be adjusted.

[0040] Rubber products (such as tire treads and seals) are often subjected to multi-directional force coupling effects such as shearing, bending, and torsion during use. By adjusting the tensile direction, the shear deformation during tire sideslip or the combined stress at pipe joints can be simulated, revealing the failure mechanism of materials under real-world conditions. Combining angle adjustment and cyclic loading functions, the fatigue life of rubber under cyclic oblique forces can be tested (such as the dynamic response of shock absorber rubber bushings), avoiding the overestimation of material durability caused by unidirectional testing.

[0041] The eccentric pressure roller 15 has anti-slip texture on its surface, and the support base 2 has anti-slip texture on its upper surface. This can improve the friction between the rubber material and the eccentric pressure roller 15 and the support base 2. When the device is used to fix the rubber material, the rubber material is less likely to slip and deviate from the test position.

[0042] In this embodiment, this project addresses the problems of weak high-temperature resistance, poor low-temperature performance, and large compression set of ordinary nitrile rubber. The project uses high-temperature polymerized hard nitrile rubber with high acrylonitrile content as the main material, adding commercially available low-cost reinforcing agents, vulcanizing agents, antioxidants, vulcanization activators, plasticizers, accelerators, and processing aids. The mixture is compounded using an internal mixer and vulcanized using a flat vulcanizing machine to prepare nitrile rubber. Furthermore, it should be noted that a novel auxiliary agent, zinc chloride salt, is introduced into the vulcanization aid. This substance can promote the crosslinking of cyano groups in the nitrile raw rubber at high temperatures, increasing the crosslinking density of the raw rubber. The experiments mainly focus on the key technologies of the nitrile rubber vulcanization system, the mechanism and key technologies of the reinforcing components, the key technologies of the heat-resistant system and the antioxidant system, as well as related research on industrial production. By systematically studying the fundamental scientific issues of nitrile butadiene rubber (NBR), including its preparation process, microstructure, physical and mechanical properties, and the mechanisms of action of its components, this study aims to elucidate, from both theoretical and practical perspectives, the chemical composition of the base rubber, the vulcanization process, and the influence and mechanisms of the structure, composition, and dosage of each component in the vulcanized rubber on high-performance NBR. The goal is to obtain key technologies for the preparation of high-performance NBR, providing technical support for its development and application. Furthermore, the study actively promotes the industrialization of modified NBR, developing the SNK series of million-pulse ultra-high-pressure hydraulic hoses and preparing high-performance NBR products.

[0043] By studying the structure-property relationships between reinforcing agents, antioxidants, heat stabilizers, anti-aging agents, and other properties of modified vulcanizates, such as mechanical properties, dynamic viscoelastic properties, heat aging resistance, and high-temperature fatigue properties, modified nitrile rubber with good high-temperature performance, excellent low-temperature performance, and low compression set coefficient was obtained.

[0044] This application focuses on the rubber performance testing of the aforementioned high-temperature resistant and low-compression-deformation nitrile rubber.

[0045] In a further preferred embodiment of the present invention:

[0046] An adjustment mechanism is installed on the bracket 3. The adjustment mechanism is connected to the eccentric pressure rollers 15 on both sides and is used to adjust the distance between the two eccentric pressure rollers 15. The adjustment mechanism includes two connecting plates 23. Each eccentric pressure roller 15 is fitted with a connecting plate 23 and can be rotatably installed. The upper end of the connecting plate 23 is protruding. A bidirectional screw 24 is rotatably installed through the bracket 3. The two ends of the bidirectional screw 24 pass through the connecting plates 23 on both sides respectively. The bidirectional screw 24 is threadedly connected to the connecting plates 23. Limiting plates 25 are fixedly installed at both ends of the bidirectional screw 24.

[0047] In this embodiment, the third servo motor 20 operates and drives the connecting shaft 21 to rotate synchronously through the synchronous belt mechanism 22. The connecting shaft 21 drives the inner spline sleeve 19 to rotate, the inner spline sleeve 19 drives the eccentric shaft 16 to rotate, the eccentric shaft 16 drives the eccentric pressure roller 15 to rotate, and the eccentric pressure roller 15 drives the second rotating shaft 13 to rotate, thereby driving the two eccentric pressure rollers 15 to rotate and press on the rubber material to be tested. Since the rotation angle of the eccentric pressure roller 15 is controllable, the distance between the eccentric pressure roller 15 and the support seat 2 is adjustable, and the device can fix rubber materials of different thicknesses.

[0048] On the other hand, by rotating the bidirectional lead screw 24, the connecting plates 23 on both sides move towards each other. The connecting plates 23 then drive the eccentric pressure rollers 15 to move synchronously, which can adjust the distance between the two eccentric pressure rollers 15, thereby fixing rubber materials of different widths. In summary, the device can perform performance testing on rubber materials of different thicknesses and widths.

[0049] Rubber materials of varying thicknesses and widths exhibit different stress-strain relationships during stretching. For example, thinner rubber sheets may be more prone to localized stress concentrations during stretching, while thicker rubber blocks may experience more complex stress distributions due to the interactions within their internal structures. By testing rubber materials of various specifications using this equipment, researchers can obtain more comprehensive and accurate stress-strain curves, gaining a deeper understanding of key mechanical parameters such as elastic modulus, yield strength, and elongation at break at different dimensions, providing reliable data support for the development of new materials.

[0050] It is worth noting that the circuits, electronic components, and modules involved in this invention are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this invention does not involve improvements to the software and methods.

[0051] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative; the division of units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; the indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. A rubber performance testing device, characterized in that, Includes a base (1), with two symmetrically distributed support seats (2) at the upper end of the base (1). Each support seat (2) is provided with a guide mechanism below it. The guide mechanism is used to guide the support seat (2). Each side of the base (1) is equipped with a tension mechanism. The tension mechanism is connected to the support seat (2) on the same side and is used to pull the support seat (2). Each support base (2) is fixedly equipped with a bracket (3), and each bracket (3) is equipped with a clamping mechanism. The clamping mechanism is connected to the support base (2) and is used to fix the rubber material on the support base (2). A controller (8) is installed on the base (1). The guiding mechanism includes two side plates (4) fixedly installed on the base (1). The two side plates (4) are respectively located on both sides of the support seat (2). The bottom of the support seat (2) is provided with an inclined surface. A first rotating shaft (5) is rotatably installed between the two side plates (4). Both ends of the first rotating shaft (5) are fixedly installed with inclined blocks (6). The inclined surface on the inclined block (6) is in contact with the inclined surface at the bottom of the support seat (2). A first servo motor (7) is fixedly installed on the side plate (4) located on one side. The output shaft of the first servo motor (7) is fixedly connected to the first rotating shaft (5). The first servo motor (7) is electrically connected to the controller (8). The controller (8) is used to control the operation of the first servo motor (7). The stretching mechanism includes a support plate (9) fixedly installed on the base (1), a second servo motor (10) fixedly installed on the support plate (9), a winding wheel (11) fixedly installed on the output shaft end of the second servo motor (10), a rope (12) fixedly connected inside the winding wheel (11), one end of the rope (12) fixedly connected to the support seat (2) on the same side thereon, and the second servo motor (10) electrically connected to the controller (8), the controller (8) being used to control the operation of the second servo motor (10); The clamping mechanism includes a second rotating shaft (13), which is mounted through and rotatably on the bracket (3). Both ends of the second rotating shaft (13) are provided with first splines (14), and both ends of the second rotating shaft (13) are provided with eccentric pressure rollers (15). The eccentric pressure rollers (15) have spline grooves inside. The end of the second rotating shaft (13) is inserted into the eccentric pressure roller (15), and the second rotating shaft (13) is splinedly connected to the eccentric pressure roller (15). An eccentric shaft (16) is fixedly mounted on the other end of each eccentric pressure roller (15). The shaft (16) is installed at the eccentric position of the eccentric pressure roller (15). A second spline (17) is provided on the eccentric shaft (16). Support blocks (18) are fixedly installed at both ends of the support base (2). Inner spline sleeves (19) are rotatably installed on the support blocks (18). One end of the eccentric shaft (16) is inserted into the inner spline sleeve (19) and the eccentric shaft (16) is splinedly connected to the inner spline sleeve (19). A drive assembly is installed on one side of the support base (2). The drive assembly is connected to the inner spline sleeve (19) and is used to drive the two eccentric pressure rollers (15) to rotate synchronously. An adjustment mechanism is installed on the bracket (3). The adjustment mechanism is connected to the eccentric pressure rollers (15) on both sides. The adjustment mechanism is used to adjust the distance between the two eccentric pressure rollers (15). The adjustment mechanism includes two connecting plates (23). The eccentric pressure roller (15) is fitted with and rotatably mounted with connecting plates (23). The upper end of the connecting plate (23) is protruding. The bracket (3) is rotatably mounted with a bidirectional screw (24). The two ends of the bidirectional screw (24) pass through the connecting plates (23) on both sides respectively. The bidirectional screw (24) is threadedly connected to the connecting plate (23). Limiting plates (25) are fixedly installed at both ends of the bidirectional screw (24).

2. The rubber performance testing equipment as described in claim 1, characterized in that, The upper surface of the support base (2) is provided with anti-slip texture.

3. The rubber performance testing equipment as described in claim 1, characterized in that, The eccentric pressure roller (15) has an anti-slip texture on its surface.

4. The rubber performance testing equipment as described in claim 1, characterized in that, The drive assembly includes a third servo motor (20), which is fixedly mounted on one side of the support base (2). A connecting shaft (21) is rotatably mounted on the support block (18) on one side. The connecting shaft (21) is fixedly connected to the inner spline sleeve (19). A synchronous belt mechanism (22) is mounted on the output shaft of the third servo motor (20) and the connecting shaft (21). The third servo motor (20) drives the connecting shaft (21) to rotate synchronously through the synchronous belt mechanism (22).

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