A motor-driven rubber material fatigue performance test device

Abstract

The utility model relates to rubber fatigue performance detection technical field, concretely relates to a motor -driven rubber material fatigue performance testing device, including support platform and work table, be equipped with drive motor and with the eccentric wheel subassembly of power output end connection of drive motor on work table, be connected with the swing bar subassembly on eccentric wheel subassembly, work table is equipped with the test piece mounting seat for placing test sample on the side away from drive motor, be equipped with the optical axis that can make linear reciprocating loading movement to test sample along the longitudinal direction of work table between test sample and swing bar subassembly, be equipped with linear bearing on work table, optical axis passes through linear bearing, be equipped with force sensor between test sample and optical axis. The fatigue performance testing device in scheme has the advantages of low cost and low energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of rubber fatigue performance testing technology, and specifically provides a motor-driven rubber material fatigue performance testing device. Background Technology

[0002] Fatigue testing equipment is typically used to test fatigue mechanical properties. It can be used to test the fatigue characteristics and fatigue life of products such as metals, alloys, and rubber products. Rubber products are mostly formed by metal-rubber-metal composite structures and can withstand traction, suspension, vibration isolation, and cushioning. They are widely used in vibration reduction systems of rail transit, high-speed vehicles, automobiles, ships, or aircraft. When the vehicle body is subjected to complex load conditions such as radial, torsional, and deflection loads, the deformation of rubber products can withstand the torsional angle and radial load, preventing the vehicle body from overturning during operation and improving the comfort of the driver and passengers.

[0003] Fatigue performance is a fundamental and important property of rubber materials. Therefore, when designing and developing rubber products, in order to ensure the stability of vehicle operation, every new rubber material must undergo thorough fatigue performance testing. The fatigue performance verification method for rubber materials usually involves repeatedly applying alternating or single-cycle force to the rubber material under tension, compression, or bending. During the process, changes in the appearance or mechanical properties of the rubber material are observed. Based on the comparison of data such as the magnitude of the alternating load and the number of cycles, basic fatigue performance data of the rubber material is obtained to guide subsequent material applications.

[0004] Existing rubber material fatigue testing devices suffer from high cost, high price, low testing efficiency, and high energy consumption of electro-hydraulic servo systems. Therefore, it is necessary to design a low-cost, low-energy rubber material fatigue testing device. Utility Model Content

[0005] To address the aforementioned problems, this invention provides a motor-driven fatigue performance testing device for rubber materials, which has low procurement and operating costs and is of practical significance for enriching fatigue testing resources for rubber material research and development.

[0006] This utility model provides a motor-driven fatigue performance testing device for rubber materials, including a support platform and a worktable located at the upper end of the support platform. The worktable is provided with a drive motor and an eccentric wheel assembly connected to the power output end of the drive motor. A pendulum assembly is connected to the eccentric wheel assembly. A specimen mounting seat for placing test samples is also provided on the side of the worktable away from the drive motor. An optical axis is provided between the test sample and the pendulum assembly, which can perform linear reciprocating loading motion on the test sample along the longitudinal direction of the worktable. A force sensor is provided between the test sample and the optical axis.

[0007] Furthermore, a linear bearing is provided on the worktable, and the optical axis passes through the linear bearing.

[0008] Furthermore, a sliding base plate is provided on the side of the worktable away from the drive motor, and a sliding groove is provided on the sliding base plate, so that the specimen mounting seat can slide along the longitudinal direction of the worktable on the sliding base plate through the sliding groove.

[0009] Furthermore, the specimen mounting base includes a longitudinal seat located at both ends of the sliding base plate and a transverse seat located between the lateral seats. The lower end of the transverse seat is provided with a slider that matches the sliding groove. The specimen mounting base slides longitudinally along the worktable in the sliding groove via the slider.

[0010] Furthermore, the upper end of the transverse seat is provided with a downward-facing receiving groove for holding the test sample.

[0011] Furthermore, the upper end of the longitudinal seat is provided with a receiving groove for holding the test sample.

[0012] Furthermore, a weight-reducing hole 1 is provided on the transverse seat below the receiving groove 1, and a weight-reducing hole 2 is provided on the longitudinal seat below the receiving groove 2.

[0013] Furthermore, the worktable is provided with a bearing housing located on the side of the drive motor, and a connecting bearing is provided inside the bearing housing; the eccentric wheel assembly includes an eccentric wheel body located inside the connecting bearing, and an adjusting block is provided on the eccentric wheel body for adjusting its eccentricity, and the adjusting block is connected to the rocker arm assembly.

[0014] Furthermore, the swing arm assembly includes a mounting block connected to the end of the optical axis away from the specimen mounting base and a swing arm hinged to the mounting block, the end of the swing arm away from the mounting block being connected to an adjustment block.

[0015] Furthermore, a T-slot is provided on the eccentric wheel body, and a T-slider is provided on the adjusting block to match the T-slot. The adjusting block can move in the T-slot through the T-slider to adjust the eccentricity of the eccentric wheel body.

[0016] Compared with the prior art, the present invention can achieve the following beneficial effects: The fatigue performance testing device in this solution conducts fatigue tests by combining an electric motor with a crank-slider mechanism, which has the advantages of low procurement cost and low operating cost. The crank-slider mechanism can achieve precise adjustment of the test displacement, and the sample performance change data during fatigue can be continuously and automatically recorded, and the results can be visualized. It can solve the problems of fatigue test resource shortage and high energy consumption of electro-hydraulic servo system, and is of great significance for enriching fatigue test resources for rubber material research and development. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the rubber material fatigue performance testing device provided according to an embodiment of the present invention; Figure 2 This is a partial structural schematic diagram of the rubber material fatigue performance testing device provided according to an embodiment of the present utility model; Figure 3 This is a partial structural schematic diagram of the rubber material fatigue performance testing device provided according to an embodiment of the present utility model.

[0018] The reference numerals in the attached drawings include: support platform 1, workbench 2, drive motor 3, test sample 4, specimen mounting base 5, optical axis 6, force sensor 7, linear bearing 8, sliding base plate 9, sliding groove 10, longitudinal seat 11, transverse seat 12, slider 13, receiving groove one 14, receiving groove two 15, weight reduction hole one 16, weight reduction hole two 17, bearing seat 18, eccentric wheel body 19, adjusting block 20, T-slot 21, mounting block 22, swing rod 23, T-block 24. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the following description is provided in conjunction with the appendix. Figure 1-3 The present invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and do not constitute a limitation thereof.

[0020] A motor-driven fatigue performance testing device for rubber materials includes a support platform 1 and a worktable 2 located on the upper end of the support platform 1. The worktable 2 is equipped with a drive motor 3 and an eccentric wheel assembly connected to the power output end of the drive motor 3. A rocker arm assembly is connected to the eccentric wheel assembly. A bearing seat 18 located to the side of the drive motor 3 is provided on the worktable 2. A connecting bearing is located within the bearing seat 18. The eccentric wheel assembly includes an eccentric wheel body 19 located within the connecting bearing. An adjusting block 20 for adjusting its eccentricity is provided on the eccentric wheel body 19. The adjusting block 20 is connected to the rocker arm assembly. A T-slot 21 is formed on the eccentric wheel body 19. A T-block 24 is formed on the adjusting block 20 to match the T-slot 21. The adjusting block 20 can move within the T-slot 21 via the T-block 24 to adjust the eccentricity of the eccentric wheel body 19. Figure 1 The M direction is the longitudinal direction of worktable 2, and the N direction is the transverse direction of worktable 2.

[0021] A sliding base plate 9 is provided on the side of the workbench 2 away from the drive motor 3. A sliding groove 10 is provided on the sliding base plate 9. The specimen mounting seat 5 can slide along the longitudinal direction of the workbench 2 on the sliding base plate 9 through the sliding groove 10. A specimen mounting seat 5 for placing the test sample 4 is also provided on the side of the workbench 2 away from the drive motor 3. The specimen mounting seat 5 includes a longitudinal seat 11 located at both ends of the sliding base plate 9 and a transverse seat 12 located between the lateral seats. The lower end of the transverse seat 12 is matched with the sliding groove 10 and has a slider 13. The specimen mounting seat 5 slides along the longitudinal direction of the workbench 2 through the slider 13 on the sliding groove 10. The upper end of the transverse seat 12 has a downward-facing receiving groove 14 for holding the test sample 4, and the upper end of the longitudinal seat 11 has a downward-facing receiving groove 15 for holding the test sample 4.

[0022] The transverse seat 12 has a weight reduction hole 16 located below the receiving groove 14, and the longitudinal seat 11 has a weight reduction hole 17 located below the receiving groove 15. In use, the specimen mounting seat 5 can be slid on the sliding base plate 9 to adjust the placement position of the test specimen 4 according to the actual test requirements of the test specimen 4. Normally, the test specimen 4 is placed in the receiving groove 14. The special receiving groove 14 can also be placed in the receiving groove 15. The receiving groove 15 is a spare structure to meet the placement requirements of different types and specifications of test specimens 4 and improve the versatility of the device. The weight reduction holes 16 and 17 facilitate weight reduction and cost reduction of the device.

[0023] A light shaft 6 is provided between the test sample 4 and the swing arm assembly, which can perform linear reciprocating loading motion on the test sample 4 along the longitudinal direction of the worktable 2. A force sensor 7 is provided between the test sample 4 and the light shaft 6. A linear bearing 8 is provided on the worktable 2, and the light shaft 6 passes through the linear bearing 8. The swing arm assembly includes a mounting block 22 connected to the end of the light shaft 6 away from the test piece mounting seat 5 and a swing rod 23 hinged to the mounting block 22. The end of the swing rod 23 away from the mounting block 22 is connected to the adjusting block 20. The drive motor 3 drives the eccentric wheel body 19. The eccentric wheel body 19 converts the rotational motion of the drive motor 3 into the linear reciprocating motion of the light shaft 6 through the swing rod 23 and the linear bearing 8. The adjusting block 20 can move in the T-slot 21 through the T-block 24 to adjust the eccentricity of the eccentric wheel body 19, thereby adjusting the stroke of the reciprocating motion of the light shaft 6.

[0024] The continuous automatic recording and visualization of performance changes of test sample 4 during fatigue process is achieved as follows: The force value of the force sensor 7 at the end of the optical axis 6 is transmitted to a computer in real time, continuously recording the load value during the reciprocating loading process and plotting the load change curve with the number of loading cycles. Through the curve, the fatigue performance level of the material can be intuitively judged, thereby realizing the continuous recording of data and visualization of results during the test of test sample 4.

[0025] When in use, the stroke adjustment method for the linear reciprocating motion of optical axis 6 is as follows: Assuming the test conditions are a reciprocating motion of ±Bmm applied to a test sample 4, the eccentric position of the eccentric wheel body 19 is preset, i.e. the position of the adjusting block 20, and a dial indicator probe is placed in contact with the end face of the optical axis 6. The eccentric wheel body 19 is manually rotated one revolution to obtain the maximum reading "A" and the minimum reading "a".

[0026] If Aa > 2B at this time, the following steps should be taken: Rotate the eccentric wheel body 19 to make the dial indicator reading a; gently tap the adjusting block 20 to move the adjusting block 20 towards the center until the dial indicator reading is (A+a) / 2-B; rotate the eccentric wheel body 19 to make the dial indicator reading (A+a) / 2, and then install the sample; start the equipment, and the reciprocating motion of ±Bmm can be achieved.

[0027] If Aa < 2B at this time, the following steps are taken: Rotate the eccentric wheel body 19 to make the dial indicator reading a; gently tap the adjusting block 20 to move the adjusting block 20 to the edge until the dial indicator reading is (A+a) / 2-B; rotate the eccentric wheel body 19 to make the dial indicator reading (A+a) / 2, and then install the sample; start the equipment, and the reciprocating motion of ±Bmm can be achieved.

[0028] Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

[0029] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A motor-driven fatigue performance testing device for rubber materials, comprising a support platform (1) and a worktable (2) located at the upper end of the support platform (1), characterized in that, The workbench (2) is provided with a drive motor (3) and an eccentric wheel assembly connected to the power output end of the drive motor (3). A swing arm assembly is connected to the eccentric wheel assembly. On the side of the workbench (2) away from the drive motor (3), there is also a specimen mounting seat (5) for placing the test sample (4). Between the test sample (4) and the swing arm assembly, there is an optical axis (6) that can perform linear reciprocating loading motion on the test sample (4) along the longitudinal direction of the workbench (2). A force sensor (7) is provided between the test sample (4) and the optical axis (6).

2. The motor-driven rubber material fatigue performance testing device according to claim 1, characterized in that, The worktable (2) is provided with a linear bearing (8), and the optical axis (6) passes through the linear bearing (8).

3. The motor-driven rubber material fatigue performance testing device according to claim 2, characterized in that, The workbench (2) is provided with a sliding base plate (9) on the side away from the drive motor (3). A sliding groove (10) is provided on the sliding base plate (9). The specimen mounting seat (5) can slide along the longitudinal direction of the workbench (2) on the sliding base plate (9) through the sliding groove (10).

4. The motor-driven rubber material fatigue performance testing device according to claim 3, characterized in that, The specimen mounting base (5) includes a longitudinal seat (11) located at both ends of the sliding base plate (9) and a transverse seat (12) located between the lateral seats. The lower end of the transverse seat (12) is matched with the sliding groove (10) and a slider (13) is provided. The specimen mounting base (5) slides longitudinally along the worktable (2) in the sliding groove (10) via the slider (13).

5. The motor-driven rubber material fatigue performance testing device according to claim 4, characterized in that, The upper end of the transverse seat (12) is provided with a receiving groove (14) for holding the test sample (4).

6. The motor-driven rubber material fatigue performance testing device according to claim 5, characterized in that, The upper end of the longitudinal seat (11) is provided with a receiving groove (15) for holding the test sample (4).

7. The motor-driven rubber material fatigue performance testing device according to claim 6, characterized in that, The transverse seat (12) has a weight reduction hole (16) located below the receiving groove (14), and the longitudinal seat (11) has a weight reduction hole (17) located below the receiving groove (15).

8. The motor-driven rubber material fatigue performance testing device according to claim 7, characterized in that, The workbench (2) is provided with a bearing seat (18) located on the side of the drive motor (3), and a connecting bearing is provided inside the bearing seat (18); the eccentric wheel assembly includes an eccentric wheel body (19) located inside the connecting bearing, and an adjusting block (20) is provided on the eccentric wheel body (19) for adjusting its eccentricity, and the adjusting block (20) is connected to the rocker arm assembly.

9. The motor-driven rubber material fatigue performance testing device according to claim 8, characterized in that, The swing arm assembly includes a mounting block (22) connected to one end of the optical axis (6) away from the specimen mounting base (5) and a swing arm (23) hinged to the mounting block (22). The end of the swing arm (23) away from the mounting block (22) is connected to the adjustment block (20).

10. The motor-driven rubber material fatigue performance testing device according to claim 9, characterized in that, The eccentric wheel body (19) is provided with a T-slot (21), and the adjusting block (20) is provided with a T-block (24) that matches the T-slot (21). The adjusting block (20) can move in the T-slot (21) through the T-block (24) to adjust the eccentricity of the eccentric wheel body (19).

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