Rubber friction force testing machine

Abstract

The utility model provides a rubber friction testing machine, which belongs to the technical field of rubber friction equipment and comprises a bottom plate. The baffle is fixedly connected to the upper end of the bottom plate; the sliding groove is formed in the side end of the baffle; the moving block is slidably connected to the baffle, the side end of the moving block is fixedly connected with a sliding block, the other side end of the moving block is fixedly connected with a limiting plate, and the sliding block is matched with the sliding groove; the air cylinder is fixedly connected to the side end of the baffle, and the output end of the air cylinder is connected with the moving block; the support is fixedly connected to the side end of the moving block, the side end of the support is rotationally connected with a rubber wheel, by means of a precise air cylinder and chain wheel tooth chain transmission system, it can be ensured that the moving block stably slides in the sliding groove, and therefore accurate friction force data are obtained. The limiting plates, the universal wheels and other parts in the equipment are beneficial to realizing accurate displacement control and stable test conditions, and the precision and repeatability of test results are improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of rubber friction equipment, specifically relating to a rubber friction testing machine. Background Technology

[0002] Tire braking ability directly affects a vehicle's braking distance and is closely linked to the safety of the driver and passengers. It is an extremely important indicator of tire performance. However, currently there are very few methods for testing rubber (tire) friction (coefficient of friction), and none of them can accurately simulate the actual operating conditions of a tire. However, among the current methods for testing tire rubber-related friction:

[0003] 1. Real-vehicle braking distance testing characterizes tire braking ability and reflects tire friction. However, real-vehicle testing is greatly affected by temperature, humidity, vehicle condition, and driver. In addition, each real-vehicle test requires 5 test tires (4 for testing and 1 as a spare), resulting in high testing costs and long testing cycles.

[0004] 2. The LAT100 laboratory abrasion and anti-slip testing machine tests the friction of rubber test wheels under locked wheel conditions. However, the testing speed is low under these conditions, and the decision to lock the wheels can only be made before the experiment begins. It is not possible to dynamically control the braking of the test wheels during the experiment, which is not conducive to verifying the results with actual vehicle tests.

[0005] 3. The Dynamic Thermomechanical Analyzer (DMA) measures the tanδ value of rubber at 25℃ to predict its dry braking capacity. However, this data only characterizes the hysteresis component of rubber by testing its viscoelasticity, and cannot characterize the adhesive friction component, thus failing to fully characterize the frictional force of the rubber. Therefore, a dynamic friction testing machine for rubber needs to be designed.

[0006] Utility model patent with authorization announcement number "CN219121957U" describes a rubber dynamic friction testing machine, including an outer casing. Inside the outer casing is an internal equipment assembly, comprising a drive wheel system, a driven real-time system, a dust removal system, and a hydraulic system. The outer casing has a safety door, an experimental chamber door, and a maintenance door. A dustproof plate is installed inside the outer casing. A safety door limit switch is installed on the outer casing. An infrared temperature measuring device is installed on the dustproof plate. A vertical sliding plate is installed on the dustproof plate. The dustproof plate has a drive wheel shaft hole, a dust collector pipe hole, a dust removal brush roller hole, and a horizontal sliding plate. This utility model relates to a rubber dynamic friction testing machine, which features a short experimental cycle and low experimental cost.

[0007] The above patent has the characteristics of short experimental period and low experimental cost, but the traditional rubber friction force test equipment is usually complex, needs multiple components to work together, and has high cost. The scheme simplifies the design, reduces the number of components, and helps to reduce the cost of the equipment. Practical new type content

[0008] The utility model discloses a rubber friction force testing machine, which aims to solve the problem of the rubber friction force test equipment in the prior art, which is usually complex, needs multiple components to work together, and has high cost. The scheme simplifies the design, reduces the number of components, and helps to reduce the cost of the equipment.

[0009] To achieve the above object, the utility model provides the following technical scheme:

[0010] A rubber friction force testing machine, comprising:

[0011] A bottom plate;

[0012] A baffle is fixedly connected to the upper end of the bottom plate;

[0013] A sliding groove is provided in the side end of the baffle;

[0014] A moving block is slidingly connected to the baffle, and the side end of the moving block is fixedly connected with a sliding block, and the other side end of the moving block is fixedly connected with a limiting plate, and the sliding block is matched with the sliding groove;

[0015] A cylinder is fixedly connected to the side end of the baffle, and the output end of the cylinder is connected with the moving block;

[0016] A support is fixedly connected to the side end of the moving block, and the side end of the support is rotatably connected with a rubber wheel.

[0017] As a preferred scheme of the utility model, the upper end of the bottom plate is fixedly connected with a side frame, and the upper end of the side frame is fixedly connected with a top plate.

[0018] As a preferred scheme of the utility model, the upper end of the bottom plate is fixedly connected with a base, the upper end of the base is fixedly connected with a support column, the side end of the support column is rotatably connected with a rotating rod, and the rotating rod is connected with a friction force test roller.

[0019] As a preferred scheme of the utility model, the side end of the rotating rod is fixedly connected with a second sprocket, the upper end of the top plate is fixedly connected with a motor, the output end of the motor is fixedly connected with a first sprocket, and the first sprocket and the second sprocket are rotatably connected with a chain through meshing.

[0020] As a preferred scheme of the utility model, universal wheels are fixedly connected to the lower end of the bottom plate at four corners.

[0021] Compared with the prior art, the utility model has the beneficial effects that:

[0022] 1、In this scheme, through using the precise cylinder and chain wheel gear transmission system, the smooth sliding of the moving block in the sliding groove can be ensured, so that the accurate friction force data is obtained. The limiting plate and universal wheel and other components in the equipment help to realize the accurate displacement control and stable test conditions, improve the precision and repeatability of the test results.

[0023] 2、In this scheme, the control of the motor makes the rotating speed and torque of the friction force test roller can be easily adjusted, so as to adapt to different test requirements and improve the test efficiency. The mobility and stability of the equipment are improved through the universal wheel under the bottom plate, which makes the equipment can be quickly and conveniently moved from one test place to another place, while keeping stable, increases the safety of operation. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings are included to provide a further understanding of the utility model, and constitute a part of the specification, and are used to explain the utility model together with embodiments of the utility model, and do not constitute the limitation to the utility model. In the drawings:

[0025] Figure 1 It is the first perspective view of the utility model;

[0026] Figure 2 It is the second perspective view of the utility model;

[0027] Figure 3 It is the explosion view of the utility model;

[0028] Figure 4 It is the utility model Figure 3 The enlarged view of the base.

[0029] In the drawing: 1, bottom plate; 2, universal wheel; 3, side frame; 4, baffle; 5, sliding groove; 6, moving block; 7, sliding block; 8, support; 9, rubber wheel; 10, limiting plate; 11, cylinder; 12, top plate; 13, motor; 14, first chain wheel; 15, base; 16, support column; 17, rotating rod; 18, second chain wheel; 19, sprocket chain; 20, friction force test roller. DETAILED DESCRIPTION

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Example 1

[0032] Please see Figures 1-4 The present invention provides the following technical solution:

[0033] A rubber friction tester, comprising:

[0034] Base plate 1;

[0035] Baffle 4 is fixedly connected to the upper end of the base plate 1;

[0036] Slide 5, slide 5 is opened at the side end of baffle 4;

[0037] The movable block 6 is slidably connected to the baffle 4. A slider 7 is fixedly connected to one side of the movable block 6, and a limit plate 10 is fixedly connected to the other side of the movable block 6. The slider 7 matches the slide groove 5.

[0038] Cylinder 11 is fixedly connected to the side end of baffle 4, and the output end of cylinder 11 is connected to moving block 6;

[0039] The bracket 8 is fixedly connected to the side end of the movable block 6, and the side end of the bracket 8 is rotatably connected to a rubber wheel 9.

[0040] In the specific embodiment of the utility model, bottom plate 1 this is the basic part of machine, provides stable support platform for other components. Baffle 4 is fixed on the upper end of bottom plate 1, plays the role of separating or blocking test area, ensures that the loss or interference of substance during testing is limited. Chute 5 is opened in the side end of baffle 4, is used to guide the movement of sliding block 7 on specific path. Moving block 6 is slidably connected on baffle 4, can move along the surface of baffle 4. It is fixedly connected with sliding block 7 on one side, and is limited with limit stop 10 on the other side. Sliding block 7 is matched with chute 5, can slide in the chute, and its effect generates force through the friction of chute wall, or is used as the guide of moving block 6. Cylinder 11 is fixedly connected with the side end of baffle 4, and its output end is connected with moving block 6, is used to drive the movement of moving block 6, to generate friction force. Bracket 8 is fixedly connected with the side end of moving block 6, provides support for rubber wheel 9. Rubber wheel 9 is rotatably connected with the side end of bracket 8, is used to contact with moving block 6 and carries out the performance evaluation of rubber material through friction test. In the specific implementation, the operator can drive moving block 6 to move in chute 5 by controlling cylinder 11, and rubber wheel 9 contacts with moving block 6 to generate friction, and the friction characteristic data of rubber material can be obtained by measuring the size of friction. Such test is very important for the development, quality control and performance evaluation of rubber products.

[0041] For details, please refer to Figures 1-2 The upper end of bottom plate 1 is fixedly connected with side frame 3, and the upper end of side frame 3 is fixedly connected with top plate 12.

[0042] In the embodiment, the side frame 3 is fixedly connected to the upper end of the bottom plate 1, which means that the side frame 3 extends along the length of the bottom plate 1, providing additional support structure for the machine. The presence of the side frame 3 can increase the overall stability and rigidity of the machine, preventing displacement or deformation of the machine during testing due to vibration or external forces. The top plate 12 is fixedly connected to the upper end of the side frame 3, and the function of the top plate 12 is to further enclose and protect the test area, ensuring the consistency of test conditions and preventing external factors from interfering with the test results. In addition, the top plate 12 also provides space for the installation of other components, such as devices for data acquisition and display, or windows for lighting and observing the testing process. The side frame 3 and the top plate 12 provide a closed and stable testing environment for the rubber friction tester, which helps to improve the accuracy and reliability of the test.

[0043] For details, please refer to Figures 1-3 The upper end of the bottom plate 1 is fixedly connected with the base 15, the upper end of the base 15 is fixedly connected with the support column 16, the side end of the support column 16 is rotatably connected with the rotating rod 17, and the rotating rod 17 is connected with the friction test roller 20.

[0044] In this embodiment: the base 15 is fixedly connected to the upper end of the base plate 1, providing stable support for the entire upper structure. The base 15 is a larger planar structure, which helps to disperse the load on the upper end of the base plate 1, increasing the stability and durability of the entire device. The support column 16 is fixedly connected to the upper end of the base 15, and its side end is rotatably connected with the rotating rod 17. The support column 16 plays a role of support and guidance, ensuring that the rotating rod 17 can rotate freely, while also providing vertical support for the entire structure. The rotating rod 17 is rotatably connected to the side end of the support column 16, and the rotating rod 17 itself is free or rotatable within a certain range, with the friction test roller 20 connected to it. The rotating rod 17 serves as a connecting component, connecting the friction test roller 20 with the support column 16, and also participating in force transmission or guidance during the test process. The friction test roller 20 is connected to the rotating rod 17 and is the main component for friction testing. The test roller 20 is usually made of a specific material to simulate the rubber parts in actual application, and its friction performance can be tested and evaluated through friction with the moving block 6 or other components. The friction test roller 20 is designed with specific shape and size to adapt to different testing needs.

[0045] For details, please refer to Figures 2-4 , the side end of the rotating rod 17 is fixedly connected with the second sprocket 18, the upper end of the top plate 12 is fixedly connected with the motor 13, the output end of the motor 13 is fixedly connected with the first sprocket 14, and the first sprocket 14 and the second sprocket 18 are meshingly rotatably connected with the chain 19.

[0046] In this embodiment: the second sprocket 18 is connected with the rotating rod 17 through the chain, so that the rotating rod 17 can drive the second sprocket 18 to rotate through the chain. This is the way to realize the rotation of the friction test roller 20 for friction testing. The motor 13 is the power source for driving the entire mechanical device to operate. It is installed at the top of the device by being fixedly connected to the upper end of the top plate 12, providing power for other components. The first sprocket 14 is connected with the output end of the motor 13, and the chain is meshed with the second sprocket 18, so that the rotating power of the motor is transmitted to the chain 19, and then transmitted to the rotating rod 17 and the friction test roller 20 through the chain 19. The chain 19 is a kind of transmission mechanism, which connects the first sprocket 14 and the second sprocket 18, and transmits power through the meshing of gears. This connection mode can realize accurate power transmission and control.

[0047] For details, please refer to Figure 1 , the lower end of the base plate 1 is fixedly connected with the universal wheel 2 at the four corners.

[0048] In this embodiment: universal wheel 2 is a special design of the wheel, it can rotate freely in multiple directions, so that the object can be carried on the different terrain smoothly. The four corners of the bottom plate 1 is installed universal wheel 2 can improve the mobility and flexibility of the whole device.

[0049] The working principle and use process of the utility model are as follows: first, prepare the required rubber sample, and install it on the friction test roller 20, ensure that the sample and the test roller 20 have appropriate contact. Place the bottom plate 1 on a stable plane, ensure that the universal wheel 2 does not affect the stability of the device. The baffle 4, the chute 5, the moving block 6, the air cylinder 11, the support 8, the side frame 3, the top plate 12, the base 15, the support column 16, the rotating rod 17, the second sprocket 18, the motor 13, the first sprocket 14 and the chain 19 and other components are correctly assembled and connected according to the description in the claims. Adjust the air cylinder 11 to control the speed and displacement of the moving block 6, ensure that it can slide smoothly. Calibrate the parameters of the test system, such as speed, power, etc., to meet the test standards or customer requirements. Start the motor 13, drive the rotating rod 17 to rotate through the chain 19, so that the friction test roller 20 starts to rotate. Control the movement of the moving block 6 in the chute 5 through the air cylinder 11, the slider 7 on the moving block 6 interacts with the chute 5 on the friction test roller 20, and the friction force is generated. During the test, collect the displacement of the moving block 6, the output force of the air cylinder 11 and the rotating speed of the friction test roller 20 and other data. Use the collected data to calculate the friction coefficient or other related friction parameters. Analyze the test results and evaluate the friction performance of the rubber sample. Turn off the motor 13 to stop the test, and disconnect the power supply. Remove the test sample, and clean and maintain the equipment for the next test.

[0050] Finally, it should be pointed out that: the above only for the preferred embodiments of the utility model, and does not limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical scheme recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. A rubber friction tester characterized by, Include: The bottom plate (1); The baffle (4) is fixedly connected to the upper end of the bottom plate (1); The chute (5) is opened in the side end of the baffle (4); The moving block (6) is slidingly connected to the baffle (4), the side end of the moving block (6) is fixedly connected with the sliding block (7), the other side end of the moving block (6) is fixedly connected with the limiting plate (10), the sliding block (7) is matched with the chute (5); The air cylinder (11) is fixedly connected to the side end of the baffle (4), the output end of the air cylinder (11) is connected with the moving block (6); The bracket (8) is fixedly connected to the side end of the moving block (6), the side end of the bracket (8) is rotatably connected with the rubber wheel (9).

2. A rubber friction tester according to claim 1, wherein: The upper end of the bottom plate (1) is fixedly connected with the side frame (3), the upper end of the side frame (3) is fixedly connected with the top plate (12).

3. A rubber friction tester according to claim 2, wherein: The upper end of the bottom plate (1) is fixedly connected with the base (15), the upper end of the base (15) is fixedly connected with the support column (16), the side end of the support column (16) is rotatably connected with the rotating rod (17), the rotating rod (17) is connected with the friction force test roller (20).

4. A rubber friction tester according to claim 3, wherein: The side end of the rotating rod (17) is fixedly connected with the second sprocket (18), the upper end of the top plate (12) is fixedly connected with the motor (13), the output end of the motor (13) is fixedly connected with the first sprocket (14), the first sprocket (14) and the second sprocket (18) are rotatably connected with the toothed chain (19) between them.

5. A rubber friction tester according to claim 4, wherein: The lower end of the bottom plate (1) is fixedly connected with the universal wheel (2) at the four corners.

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