Rubber performance testing equipment

Abstract

The invention is suitable for the technical field of rubber testing, and provides rubber performance testing equipment which comprises a base, two symmetrically-distributed supporting seats are arranged at the upper end of the base, guide mechanisms are arranged below the supporting seats and used for guiding the supporting seats, and stretching mechanisms are installed on the two sides of the base and used for stretching the supporting seats. The stretching mechanism is connected with the supporting base on the same side and used for pulling the supporting base. Supports are fixedly installed on the supporting bases, clamping mechanisms are installed on the supports and connected with the supporting bases, the supporting bases are guided by arranging inclined blocks, when a first servo motor drives a first rotating shaft to rotate, the inclined blocks rotate around the first rotating shaft, the inclination direction of the inclined faces of the inclined blocks can be adjusted, and therefore the supporting bases are guided to different directions; by adjusting the stretching direction, shear deformation during tire sideslip or composite stress of a pipeline interface can be simulated, a failure mechanism of a material under a real working condition is revealed, and overestimation of a unidirectional test on the durability of the material is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of rubber testing, and in particular relates to a rubber performance testing device. Background Art

[0002] Modified nitrile rubber (NBR) is a vulcanized rubber with excellent oil resistance, high and low temperature resistance, and good mechanical properties, making it suitable for a wide range of applications. Rubber performance testing equipment is diverse and can be categorized as either unvulcanized rubber processing performance testing equipment or vulcanized rubber performance testing equipment, depending on the test item. Currently, testing is performed on nitrile rubber with high temperature resistance and low compression set. For example, tensile testing equipment applies a tensile force to the rubber to observe and record its deformation and recovery.

[0003] For example, the rubber tensile testing machine with publication number CN206563677U specifically discloses a support bracket with a work area and a power distribution device disposed thereon. The work area is provided with a main panel that can be raised or lowered, and a workpiece placement mold for placing a test workpiece on the main panel. The workpiece placement mold is provided with a metal sensor. An operating platform is provided above the main panel. A hole for passing the workpiece is provided on the operating platform at the position corresponding to the workpiece placement mold. The hole is provided with a replaceable resistance structure. A reflector is provided on the upper side of the operating platform for observing the back of the workpiece. The power distribution device includes a touch screen for viewing detection data, and the data detected by the metal sensor is transmitted to the touch screen. This utility model is characterized by simple operation and convenient observation.

[0004] Existing rubber tensile testing equipment is unable to apply oblique tension to rubber materials. Rubber products often experience multi-directional stresses in actual use, such as lateral shear in tires and complex deformation in seals. Oblique tensile testing can simulate these complex stress scenarios. However, this equipment only supports unidirectional tension, which can lead to test results that deviate from actual working conditions, distorting material performance assessments and potentially masking potential structural defects, impacting product safety and reliability. To address this issue, we propose a rubber performance testing device. Summary of the Invention

[0005] The present invention provides a rubber performance testing device, aiming to solve the problem that current rubber tensile performance testing devices are unable to apply oblique tension 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 at the upper end of the base, and a guide mechanism is provided under the support seats. The guide mechanism is used to guide the support seats. Stretching mechanisms are installed on both sides of the base, and the stretching mechanisms are connected to the support seats on the same side and are used to pull the support seats.

[0007] The support seats are all fixedly mounted with brackets, the brackets are all mounted with clamping mechanisms, the clamping mechanisms are connected to the support seats, the clamping mechanisms are used to fix the rubber material on the support seats, and a controller is mounted on the base.

[0008] Preferably, the guide mechanism includes two side panels fixedly mounted on the base, the two side panels are arranged on both sides of the support seat, an inclined surface is provided at the bottom of the support seat, a first rotating shaft is rotatably mounted between the two side panels, inclined blocks are fixedly mounted at both ends of the first rotating shaft, and the inclined surface on the inclined block contacts the inclined surface at the bottom of the support seat.

[0009] Preferably, a first servo motor is fixedly mounted on the side panel at one side, an output shaft of the first servo motor is fixedly connected to the first rotating shaft, and 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 the 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 body fixedly connected to the winding wheel, one end of the rope body fixedly connected to the support seat on the same side thereof, the second servo motor electrically connected to the controller, and the controller is used to control the operation of the second servo motor.

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

[0012] Preferably, the clamping mechanism includes a second rotating shaft, a second rotating shaft passing through and rotatably installed on the bracket, a first spline is provided at both ends of the second rotating shaft, an eccentric pressure roller is provided at both ends of the second rotating shaft, a spline groove is provided inside the eccentric pressure roller, the end of the second rotating shaft is inserted into the eccentric pressure roller, and the second rotating shaft is spline-connected to the eccentric pressure roller, and the other end of the eccentric pressure roller is fixedly installed with an eccentric shaft, the eccentric shaft is installed at the eccentric position of the eccentric pressure roller, and a second spline is provided on the eccentric shaft, support blocks are fixedly installed at both ends of the support seat, and an internal spline sleeve is rotatably installed on the support block, one end of the eccentric shaft is inserted into the internal spline sleeve and the eccentric shaft is spline-connected to the internal spline sleeve, a drive assembly is installed on one side of the support seat, and the drive assembly is connected to the internal spline sleeve and is used to drive the two eccentric pressure rollers to rotate synchronously.

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

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

[0015] Preferably, an adjustment mechanism is installed on the bracket, the adjustment mechanism 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 adjustment mechanism includes two connecting plates, the eccentric pressure rollers are each sleeved with a connecting plate and rotatably installed, the upper end of the connecting plate is provided with a protrusion, a bidirectional screw rod is passed through and rotatably installed on the bracket, the two ends of the bidirectional screw rod respectively pass through the connecting plates on both sides, the bidirectional screw rod is threadedly connected to the connecting plate, and both ends of the bidirectional screw rod are fixedly installed with a limiting plate.

[0017] Compared with the related art, the rubber performance testing equipment provided by the present invention has the following beneficial effects:

[0018] The support seat is guided by setting an inclined block. When the first servo motor drives the 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 to guide the support seat to different directions. By pulling the support seats on both sides away from each other, the rubber material on the support seat can be pulled to both sides to perform a tensile test on the rubber material. At the same time, the stretching direction of the rubber material can be adjusted.

[0019] By adjusting the stretching direction, the shear deformation during tire side slip or the composite stress of the pipe interface 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 spacing between the eccentric roller 15 and the support base 2, the device can secure rubber materials of varying thicknesses. The spacing between the two eccentric rollers 15 can also be adjusted to secure rubber materials of varying widths. By testing a variety of rubber materials using this device, 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 material sizes, and providing reliable data support for the development of new materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a working schematic diagram of the present invention;

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

[0023] Figure 3 It is an enlarged schematic diagram of part of the structure of the support seat in the present invention;

[0024] Figure 4 It is a partial enlarged schematic diagram of the structure of the eccentric pressure roller in the present invention;

[0025] Figure 5 For the present invention Figure 2 A is an enlarged schematic diagram;

[0026] Figure 6 It is a partial enlarged schematic diagram of the structure of the oblique block in the present invention;

[0027] Figure 7 It is a schematic diagram of the cooperation between the support seat and the inclined block in the present invention.

[0028] In the figure: base 1, support seat 2, bracket 3, side panel 4, first rotating shaft 5, inclined block 6, first servo motor 7, controller 8, support plate 9, second servo motor 10, take-up wheel 11, rope body 12, second rotating shaft 13, first spline 14, eccentric pressure roller 15, eccentric shaft 16, second spline 17, support block 18, inner spline sleeve 19, third servo motor 20, connecting shaft 21, synchronous belt mechanism 22, connecting plate 23, bidirectional screw rod 24, limit plate 25. DETAILED DESCRIPTION

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0030] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may 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 bases 2 disposed at the upper end. A guide mechanism is provided below each support base 2 for guiding the support bases 2. A stretching mechanism is mounted on each side of the base 1, connected to the support base 2 on the same side and used to pull the support base 2. A bracket 3 is fixedly mounted on each support base 2, each bracket 3 being mounted with a clamping mechanism connected to the support base 2 for securing the rubber material on the support base 2. A controller 8 is mounted on the base 1.

[0033] The guide mechanism includes two side panels 4 fixedly mounted on the base 1. The two side panels 4 are located 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 panels 4. Inclined blocks 6 are fixedly mounted at each end of the first rotating shaft 5. The inclined surfaces of the inclined blocks 6 contact the inclined surface at the bottom of the support base 2. A first servo motor 7 is fixedly mounted on one side panel 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 is used to control 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 direction of the inclined surface on the inclined block 6, and the side plates 4 on both sides limit the two sides of the support base 2 so that the support base 2 will not deviate 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, and the inclination direction of the inclined surface of the inclined block 6 can be adjusted, thereby guiding the support base 2 to different directions. In conjunction with the self-locking work of the first servo motor 7, the angle of the inclined block 6 can be kept stable.

[0035] Among them, the stretching mechanism includes a support plate 9 fixedly mounted on the base 1, a second servo motor 10 is fixedly mounted on the support plate 9, a winding wheel 11 is fixedly mounted on the output shaft end of the second servo motor 10, a rope body 12 is fixedly connected to the winding wheel 11, one end of the rope body 12 is fixedly connected to the support base 2 on the same side thereof, and the second servo motor 10 is electrically connected to the controller 8, which is used to control the operation of the second servo motor 10.

[0036] Among them, the clamping mechanism includes a second rotating shaft 13, a second rotating shaft 13 is passed through and rotatably installed on the bracket 3, a first spline 14 is provided at both ends of the second rotating shaft 13, an eccentric pressure roller 15 is provided at both ends of the second rotating shaft 13, a spline groove is provided inside the eccentric pressure roller 15, the end of the second rotating shaft 13 is inserted into the eccentric pressure roller 15, and the second rotating shaft 13 is spline-connected to the eccentric pressure roller 15, and the other end of the eccentric pressure roller 15 is fixedly installed with an eccentric shaft 16, the eccentric shaft 16 is installed at the eccentric position of the eccentric pressure roller 15, and a second spline 17 is provided on the eccentric shaft 16, support blocks 18 are fixedly installed at both ends of the support seat 2, and an internal spline sleeve 19 is rotatably installed on the support block 18, one end of the eccentric shaft 16 is inserted into the internal spline sleeve 19 and the eccentric shaft 16 is spline-connected to the internal spline sleeve 19, and a driving assembly is installed on one side of the support seat 2, the driving assembly is connected to the internal spline sleeve 19 and is used to drive the two eccentric pressure rollers 15 to rotate synchronously. The driving assembly includes a third servo motor 20, which is fixedly mounted on one side of the support seat 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 installed 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] The working diagram of the device can be referred to Figure 1 As shown, the rubber material to be tested is placed on the support seats 2 on both sides, and the inclination angle of the inclined block 6 on one side is adjusted to a horizontal state, and the inclination angle of the inclined block 6 on the other side is adjusted to a certain angle, and the rubber material on the support seat 2 is fixed by setting a clamping mechanism.

[0038] The third servo motor 20 works 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. 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] The second servo motor 10 then drives the winding wheel 11 to rotate, and the winding wheel 11 rotates and drives the rope body 12 to be wound inside the winding wheel 11. The rope body 12 can pull the support seat 2 to one side, and the support seats 2 on both sides move away from each other. The rubber material on the support seat 2 can be pulled to both sides to perform a tensile test on the rubber material. At the same time, the stretching direction of the rubber material can be adjusted.

[0040] Rubber products (such as tire treads and seals) are often subjected to multi-directional forces such as shear, bending, and torsion during use. By adjusting the stretching direction, the shear deformation during tire sideslip or the combined stresses of pipeline joints can be simulated, revealing the material's failure mechanism under real-world operating conditions. Combining angle adjustment with cyclic loading capabilities allows testing the fatigue life of rubber under periodic oblique forces (such as the dynamic response of shock absorber rubber bushings), avoiding overestimation of material durability due to unidirectional testing.

[0041] The surface of the eccentric pressure roller 15 is provided with anti-slip texture, and the upper surface of the support seat 2 is provided with anti-slip texture, which can increase the friction between the rubber material and the eccentric pressure roller 15 and the support seat 2. When the device fixes the rubber material, the rubber material is not easy to slide and deviate from the test position.

[0042] In the present embodiment, this project is aimed at the performance of current ordinary acrylonitrile-butadiene rubber, which has the problems of weak high temperature resistance, poor low temperature performance, large compression permanent deformation coefficient, etc. to carry out relevant research work. The project adopts high-temperature polymerized hard acrylonitrile-butadiene rubber with high acrylonitrile content as the main material, adds reinforcing agent, vulcanizing agent, antioxidant, vulcanization activator, plasticizer, accelerator, processing aid and other components with relatively low commercial cost, mixes by internal mixer, and vulcanizes and prepares acrylonitrile-butadiene rubber by flat vulcanizing machine. In addition, it should be noted that we have introduced a new auxiliary agent, zinc chloride salt, into the vulcanizing agent. This substance can promote the crosslinking of cyano groups in acrylonitrile-butadiene rubber at high temperature and improve the crosslinking density of the raw rubber. In the experiment, the key technology research of the vulcanization system of acrylonitrile-butadiene rubber, the mechanism of action and key technology research of reinforcing components, the key technology research of heat-resistant system and the key technology research of anti-aging system and the related research work of industrial production are mainly carried out. By systematically studying the basic scientific issues of nitrile rubber, such as its preparation process, microscopic characteristics, physical and mechanical properties, and the mechanism of action of its various components, we aim to clarify, from a theoretical and practical perspective, the chemical composition of the base rubber, the vulcanization process of the rubber, and the influence and mechanism of action of the structure, composition, and dosage of the various components in the vulcanized rubber on high-performance nitrile rubber. This will help us identify key technologies for the preparation of high-performance nitrile rubber and provide technical support for its development and application. Furthermore, we are actively conducting industrial research on modified nitrile rubber, developing the SNK series of million-pulse ultra-high-pressure hydraulic hoses, and preparing high-performance nitrile rubber products.

[0043] By studying the structure-activity relationship between reinforcing agents, antioxidants, heat stabilizers, antioxidants, etc. and the mechanical properties, dynamic viscoelastic properties, hot air aging resistance, high temperature fatigue performance and other properties of modified vulcanized rubber, a modified nitrile rubber with good high temperature performance, good low temperature performance and small compression permanent deformation coefficient is obtained.

[0044] This application conducts rubber performance testing on the above-mentioned high-temperature resistant and low compression permanent deformation nitrile rubber.

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

[0046] An adjustment mechanism is mounted on the bracket 3 and connected to the eccentric pressure rollers 15 on both sides. The adjustment mechanism is used to adjust the spacing between the two eccentric pressure rollers 15. The adjustment mechanism includes two connecting pieces 23. The connecting pieces 23 are sleeved and rotatably mounted on each of the eccentric pressure rollers 15. The upper ends of the connecting pieces 23 are provided with protrusions. A bidirectional screw rod 24 is penetrated and rotatably mounted on the bracket 3. The two ends of the bidirectional screw rod 24 respectively penetrate the connecting pieces 23 on both sides. The bidirectional screw rod 24 is threadedly connected to the connecting pieces 23. A limit piece 25 is fixedly mounted on both ends of the bidirectional screw rod 24.

[0047] In this embodiment, the third servo motor 20 works 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 can be adjusted, and the device can fix rubber materials of different thicknesses.

[0048] Furthermore, by rotating the bidirectional screw 24, the connecting pieces 23 on both sides move toward each other. The connecting pieces 23 then drive the eccentric rollers 15 to move synchronously, allowing the spacing between the two eccentric rollers 15 to be adjusted, thereby securing rubber materials of varying widths. In summary, the device can perform performance testing on rubber materials of varying thicknesses and widths.

[0049] Rubber materials of varying thickness and width exhibit different stress-strain relationships during stretching. For example, thinner rubber sheets may be more susceptible to localized stress concentration during stretching, while thicker rubber blocks may experience more complex stress distribution due to interactions within their internal structures. By testing various rubber materials 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 material sizes, and providing reliable data support for the development of new materials.

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

[0051] In the several embodiments provided in this application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the above-mentioned units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunications or other forms.

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the invention. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work 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, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also fall within the scope of protection of the present invention.

Claims

1. A rubber performance testing device, characterized in that: The invention comprises a base (1), wherein the upper end of the base (1) is provided with two symmetrically distributed support seats (2), and a guide mechanism is provided below each of the support seats (2), and the guide mechanism is used to guide the support seats (2). A stretching mechanism is installed on both sides of the base (1), and the stretching mechanism is connected to the support seat (2) on the same side thereof and is used to pull the support seat (2); A bracket (3) is fixedly mounted on each of the support seats (2), a clamping mechanism is mounted on each of the brackets (3), the clamping mechanism is connected to the support seat (2), and the clamping mechanism is used to fix the rubber material on the support seat (2), and a controller (8) is mounted on the base (1).

2. The rubber performance testing device according to claim 1, characterized in that: The guide mechanism comprises two side plates (4) fixedly mounted on the base (1), the two side plates (4) being respectively arranged on both sides of the support seat (2), the bottom of the support seat (2) being provided with an inclined surface, a first rotating shaft (5) being rotatably mounted between the two side plates (4), inclined blocks (6) being fixedly mounted at both ends of the first rotating shaft (5), and the inclined surfaces on the inclined blocks (6) being in contact with the inclined surfaces at the bottom of the support seat (2).

3. The rubber property testing device according to claim 2, characterized in that: A first servo motor (7) is fixedly mounted on the side panel (4) at one side, an output shaft of the first servo motor (7) is fixedly connected to the first rotating shaft (5), and the first servo motor (7) is electrically connected to a controller (8), and the controller (8) is used to control the operation of the first servo motor (7).

4. The rubber performance testing device according to claim 1, characterized in that: The stretching mechanism comprises a support plate (9) fixedly mounted on a base (1), a second servo motor (10) fixedly mounted on the support plate (9), a winding wheel (11) fixedly mounted on the output shaft end of the second servo motor (10), a rope body (12) fixedly connected inside the winding wheel (11), one end of the rope body (12) fixedly connected to a support base (2) on the same side thereof, the second servo motor (10) being electrically connected to a controller (8), and the controller (8) being used to control the operation of the second servo motor (10).

5. The rubber performance testing equipment according to claim 1, characterized in that: The upper surface of the support seat (2) is provided with anti-slip patterns.

6. The rubber property testing device according to claim 1, characterized in that: The clamping mechanism includes a second rotating shaft (13), the second rotating shaft (13) is passed through and rotatably mounted on the bracket (3), both ends of the second rotating shaft (13) are provided with a first spline (14), both ends of the second rotating shaft (13) are provided with an eccentric pressure roller (15), a spline groove is provided inside the eccentric pressure roller (15), the end of the second rotating shaft (13) is inserted into the eccentric pressure roller (15), and the second rotating shaft (13) is spline-connected to the eccentric pressure roller (15), the other end of the eccentric pressure roller (15) is fixedly mounted with an eccentric shaft (16), and the eccentric pressure roller (15) is fixedly mounted with an eccentric shaft (16). The shaft (16) is installed at the eccentric position of the eccentric pressure roller (15), and a second spline (17) is provided on the eccentric shaft (16). Support blocks (18) are fixedly installed at both ends of the support seat (2), and an internal spline sleeve (19) is rotatably installed on the support block (18). One end of the eccentric shaft (16) is inserted into the internal spline sleeve (19) and the eccentric shaft (16) is spline-connected to the internal spline sleeve (19). A driving component is installed on one side of the support seat (2), and the driving component is connected to the internal spline sleeve (19) and is used to drive the two eccentric pressure rollers (15) to rotate synchronously.

7. The rubber property testing device according to claim 6, characterized in that: The surface of the eccentric pressing roller (15) is provided with anti-slip texture.

8. The rubber property testing device according to claim 6, characterized in that: The driving assembly comprises a third servo motor (20), the third servo motor (20) being fixedly mounted on one side of the support seat (2), a connecting shaft (21) being rotatably mounted on the support block (18) located on one side, the connecting shaft (21) being fixedly connected to the inner spline sleeve (19), a synchronous belt mechanism (22) being mounted on the output shaft of the third servo motor (20) and the connecting shaft (21), and the third servo motor (20) driving the connecting shaft (21) to rotate synchronously via the synchronous belt mechanism (22).

9. The rubber property testing device according to claim 6, characterized in that: An adjustment mechanism is installed on the bracket (3), the adjustment mechanism is connected to the eccentric pressure rollers (15) on both sides, and the adjustment mechanism is used to adjust the distance between the two eccentric pressure rollers (15).

10. The rubber property testing device according to claim 9, characterized in that: The adjustment mechanism comprises two connecting pieces (23), each of the connecting pieces (23) is sleeved on the eccentric pressure roller (15) and rotatably mounted thereon, the upper end of the connecting piece (23) is provided with a protrusion, a bidirectional screw rod (24) is passed through the bracket (3) and rotatably mounted thereon, the two ends of the bidirectional screw rod (24) respectively pass through the connecting pieces (23) on both sides, the bidirectional screw rod (24) is threadedly connected to the connecting piece (23), and the two ends of the bidirectional screw rod (24) are fixedly mounted with a limit piece (25).

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