A device for testing the thermal tensile deformation rate of rubber for inner tubes

Abstract

This utility model discloses a device for testing the thermal tensile deformation rate of rubber for inner tubes, relating to the field of inner tube testing equipment. It includes a main body with a testing frame on top and a control panel on the side wall. The inner wall of the testing frame has a testing component for testing the rubber. The testing component includes a tensile groove formed in the inner wall of the testing frame, with a movable seat slidably mounted on the inner wall of the tensile groove. The outer wall of the testing frame has a heating component for heating the rubber. This device for testing the thermal tensile deformation rate of rubber for inner tubes, through the integrated design of the testing and heating components, achieves complete and practical testing data. It can intuitively analyze the impact of different high-temperature conditions on the deformation performance of rubber, providing more comprehensive data support for optimizing inner tube rubber formulations and assessing service life. Furthermore, the device has a compact structure, is easy to operate, and is suitable for the efficient testing needs of production sites.

Description

Technical Field

[0001] This utility model relates to the technical field of inner tube testing equipment, specifically to a device for testing the thermal tensile deformation rate of rubber for inner tubes. Background Technology

[0002] The thermal stretching deformation rate of rubber used in inner tubes is a key indicator affecting the service life and safety of tire inner tubes, especially in high-temperature environments, such as high road surface temperatures in summer and tire heating during long-distance driving. The stretching deformation performance of rubber is directly related to whether the inner tube is prone to cracking, air leakage, or other problems.

[0003] In the prior art, Chinese Patent No. CN221405091U discloses a rubber tensile testing device, relating to the field of rubber production and processing technology. The device includes: a base, a slide rail fixed to the base, a slider sliding on the slide rail, a fixing block fixed to the base and positioned near the end of the slide rail, and a cylinder fixed to the base and connected to the slider; it also includes two clamps respectively fixed to the slider and the fixing block; each clamp includes a fixed clamping arm, a movable clamping arm, and an adjusting screw; the fixed clamping arm includes a first fixed clamping arm and a second fixed clamping arm connected in a cross configuration; the movable clamping arm includes a first movable clamping arm and a second movable clamping arm connected in a cross configuration; the front end of the first movable clamping arm is hinged to the first fixed clamping arm; and the second movable clamping arm is bent toward the second fixed clamping arm. This rubber tensile testing device has a simple structure, low manufacturing cost, and can be used directly on the production site for testing, resulting in high testing efficiency.

[0004] Based on the above information, existing tensile testing equipment for testing inner tube rubber typically performs conventional tensile strength tests, lacking data on the tensile deformation performance of rubber under high-temperature environments such as high road surface temperatures in summer and tire heating during long-distance driving. Therefore, we propose a device for testing the thermal tensile deformation rate of inner tube rubber. Utility Model Content

[0005] The purpose of this invention is to provide a device for testing the thermal tensile deformation rate of rubber for inner tubes, in order to solve the problem mentioned in the background art that the existing tensile testing devices for testing rubber for inner tubes usually perform conventional tensile strength testing, and lack data on the tensile deformation performance of rubber under high-temperature environments such as high road surface temperatures in summer and tire heating during long-distance driving.

[0006] To achieve the above objective, the utility model provides the following technical solution: a device for detecting the hot tensile deformation rate of rubber for inner tubes, comprising a device main body, a detection frame is arranged at the top of the device main body, a control panel is arranged on the side wall of the device main body, a detection assembly for detecting rubber is arranged on the inner wall of the detection frame, the detection assembly comprises a stretching slot opened on the inner wall of the detection frame, a moving seat is slidably installed on the inner wall of the stretching slot, and a heating assembly for heating rubber is arranged on the outer wall of the detection frame.

[0007] Further, the detection frame as a whole is designed in a "back" shape, the stretching slots are symmetrically arranged on the inner walls of both sides of the detection frame, and the stretching slots are opened along the length direction of the detection frame.

[0008] Further, both ends of the moving seat are slidably connected to two groups of the stretching slots respectively, a displacement sensor is arranged on the outer wall of the moving seat, clamps are arranged on both the moving seat and the inner wall of the end portion of the detection frame, a tension sensor is arranged between the moving seat and the clamp, and the displacement sensor and the tension sensor are both electrically connected to the control panel through wires.

[0009] Further, a driving screw is rotatably installed on the inner wall of the stretching slot, a driven bevel gear is arranged at the end portion of the driving screw, and the moving seat is threadedly connected to the driving screw.

[0010] Further, a driving motor is fixedly installed on the outer wall of the detection frame, a driving bevel gear is fixedly installed at the output end of the driving motor, a linkage shaft is rotatably installed inside the detection frame, a driving bevel gear and a linkage helical gear are arranged on the outer wall of the linkage shaft, the linkage shaft is located at the end portion of the driving screw, the linkage shaft is arranged perpendicular to the driving screw, and the length of the linkage shaft is the same as the distance between the two groups of the driving screws.

[0011] Further, the driving bevel gears are symmetrically arranged at both ends of the linkage shaft, the driving bevel gears are meshed with the driven bevel gears, the linkage helical gear is located between the two groups of driving bevel gears, and the linkage helical gear is meshed with the driving helical gear.

[0012] Further, the heating assembly comprises a heating box slidably installed on the top of the detection frame, uniform heating plates are arranged on the inner wall of the heating box and the top of the device main body, and heating pipes are arranged on the outer wall of the uniform heating plates.

[0013] Further, the cross section of the heating box is in an inverted U-shaped design, symmetrically distributed temperature sensors are arranged on the inner walls at both ends of the heating box, and the temperature sensors are electrically connected to the control panel through wires.

[0014] Compared with the prior art, the beneficial effects of the utility model are: 1. This inner tube rubber thermal tensile deformation rate testing equipment solves the problem of the lack of high-temperature scenario simulation testing in existing technologies through a specially designed heating component. It adopts an inverted U-shaped heating box with symmetrical heat spreaders and heating tubes at the top and bottom to form a wrap-around heating of the rubber sample in the testing frame, accurately simulating actual working conditions such as high road surface temperature in summer and tire heating during long-distance driving. At the same time, temperature sensors at both ends of the heating box provide real-time feedback on the internal temperature, and the control panel enables precise temperature control. This fills the gap in existing conventional tensile testing equipment that cannot obtain rubber deformation data under high-temperature conditions, and provides key testing support for the performance evaluation of inner tube rubber under extreme temperatures.

[0015] 2. The transmission structure design ensures the synchronization and stability of tensile testing. The drive motor drives the linkage shaft to rotate through the drive helical gear. The active bevel gears at both ends of the linkage shaft synchronously mesh with the driven bevel gears of the drive screw, causing the drive screws in the tensile grooves on both sides of the testing frame to rotate synchronously, thereby driving the moving seat to move smoothly along the tensile groove. Compared with the uneven force and slippage problems that are prone to occur in the single-end drive of the existing technology, it can avoid the rubber sample from becoming skewed or having local stress concentration during the tensile process. Combined with the displacement sensor on the moving seat and the tension sensor between the fixtures, it can accurately collect tensile data and tension data, significantly improving the accuracy of hot tensile deformation rate testing.

[0016] 3. The equipment achieves completeness and practicality of test data through the integrated design of the detection and heating components. The detection frame provides a stable foundation for the installation and movement of the heating chamber, which can slide along the top of the detection frame to adjust the heating position, ensuring that the rubber sample is in a uniform high-temperature environment. At the same time, the displacement sensor, tensile sensor, and temperature sensor are all electrically connected to the control panel, which can simultaneously record the tensile deformation, stress changes, and real-time temperature of the rubber under high-temperature conditions. Compared with the limitations of existing technologies that can only detect conventional tensile strength, this equipment can intuitively analyze the impact of different high-temperature conditions on the deformation performance of rubber, providing more comprehensive data support for the optimization of inner tube rubber formulations and service life assessment. Moreover, the equipment has a compact structure and is easy to operate, making it suitable for the high-efficiency testing needs of production sites. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic cross-sectional view of the testing frame and heating box of this utility model; Figure 3 This is a schematic diagram of the detection component structure of this utility model; Figure 4 This is a schematic diagram of the movable base, drive screw, and linkage shaft of this utility model; Figure 5 This is a schematic diagram of the cross-sectional structure of the stretch groove of this utility model; Figure 6 This is a schematic diagram of the heating component structure of this utility model.

[0018] In the diagram: 1. Main body of the equipment; 101. Control panel; 2. Testing frame; 201. Tensile groove; 3. Moving seat; 301. Tension sensor; 302. Displacement sensor; 303. Fixture; 4. Drive screw; 401. Driven bevel gear; 5. Linkage shaft; 501. Driven bevel gear; 502. Linkage helical gear; 6. Drive motor; 601. Drive helical gear; 7. Heating box; 701. Heat spreader plate; 702. Heating tube; 8. Temperature sensor. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0020] Example 1: Please refer to Figures 1-5 The present invention provides the following technical solution: a device for testing the thermal tensile deformation rate of rubber for inner tubes, comprising a device body 1, a testing frame 2 on the top of the device body 1, a control panel 101 on the side wall of the device body 1, and a testing component for testing the rubber on the inner wall of the testing frame 2. The testing component includes a tensile groove 201 opened on the inner wall of the testing frame 2, and a movable seat 3 is slidably installed on the inner wall of the tensile groove 201.

[0021] like Figures 1-5 As shown, the testing frame 2 has an overall "U" shape design. The stretching grooves 201 are symmetrically arranged on the inner walls of both sides of the testing frame 2, and the stretching grooves 201 are opened along the length of the testing frame 2. The two ends of the movable seat 3 are slidably connected to the two sets of stretching grooves 201 respectively. The outer wall of the movable seat 3 is provided with a displacement sensor 302. The inner walls of both the movable seat 3 and the end of the testing frame 2 are provided with clamps 303. A tension sensor 301 is provided between the movable seat 3 and the clamps 303. The displacement sensor 302 and the tension sensor 301 are electrically connected to the control panel 101 through wires.

[0022] like Figures 2-5As shown, a drive screw 4 is rotatably mounted on the inner wall of the stretching groove 201, and a driven bevel gear 401 is provided at the end of the drive screw 4. The movable seat 3 is threadedly connected to the drive screw 4. A drive motor 6 is fixedly mounted on the outer wall of the detection frame 2, and a drive helical gear 601 is fixedly mounted on the output end of the drive motor 6. A linkage shaft 5 is rotatably mounted inside the detection frame 2, and an active bevel gear 501 and a linkage helical gear 502 are provided on the outer wall of the linkage shaft 5. The linkage shaft 5 is located at the end of the drive screw 4, and the linkage shaft 5 is perpendicular to the drive screw 4. The length of the linkage shaft 5 is the same as the distance between the two sets of drive screws 4. The active bevel gear 501 is symmetrically arranged at both ends of the linkage shaft 5, and the active bevel gear 501 is meshed with the driven bevel gear 401. The linkage helical gear 502 is located between the two sets of active bevel gears 501, and the linkage helical gear 502 is meshed with the drive helical gear 601.

[0023] First, the two ends of the inner tube rubber sample to be tested are fixed on the clamps 303 of the moving seat 3 and the clamps 303 on the inner wall of the end of the testing frame 2, respectively. The fastening structure of the clamps 303 ensures that the sample is installed stably. Then, the tensile parameters are set through the control panel 101 on the side wall of the main body 1. After the parameters are set, the control panel 101 sends a start command to the drive motor 6. After the drive motor 6 starts, the drive helical gear 601 at its output end rotates synchronously. Since the drive helical gear 601 is meshed with the linkage helical gear 502 on the outer wall of the linkage shaft 5, the linkage shaft 5 is driven to rotate smoothly inside the testing frame 2. The active bevel gears 501, symmetrically arranged at both ends of the linkage shaft 5, rotate synchronously with the linkage shaft 5. The active bevel gears 501 mesh with the driven bevel gears 401 at the end of the drive screw 4 on the inner wall of the tensile groove 201. Therefore, the two sets of drive screws 4 rotate synchronously under the drive of the active bevel gears 501. Since the moving seat 3 is threadedly connected to the drive screw 4 and the two ends of the moving seat 3 slide in the tensile groove 201 on both sides of the inner wall of the test frame 2, the rotational motion of the drive screw 4 is converted into the linear motion of the moving seat 3 along the length of the tensile groove 201. As the moving seat 3 moves away from the end of the test frame 2, it forms a uniform tensile force on the rubber sample. During the stretching process, the displacement sensor 302 on the outer wall of the moving seat 3 detects the moving distance of the moving seat 3 in real time, which is the actual stretching amount of the rubber sample. At the same time, the tension sensor 301 between the moving seat 3 and the clamp 303 collects the tensile force on the sample in real time and transmits the stretching amount and tensile force data to the control panel 101 through wires. The control panel 101 processes the data in real time, and automatically calculates the thermal tensile deformation rate of the rubber sample in combination with the preset initial length of the sample. The data changes are dynamically displayed on the panel display screen to complete the entire tensile testing process.

[0024] Example 2: Please refer to Figures 1-6Based on Embodiment 1, a heating assembly is also disclosed, the specific structure of which is as follows: the outer wall of the testing frame 2 is provided with a heating assembly for heating the rubber. The heating assembly includes a heating box 7 that is slidably installed on the top of the testing frame 2. The inner wall of the heating box 7 and the top of the main body 1 of the equipment are both provided with heat spreaders 701, and the outer wall of the heat spreaders 701 is provided with heating tubes 702. The cross-section of the heating box 7 is designed in an inverted U shape, and the inner walls at both ends of the heating box 7 are provided with temperature sensors 8 that are symmetrically distributed. The temperature sensors 8 are electrically connected to the control panel 101 through wires.

[0025] Before the testing components are started, the target heating temperature is set via the control panel 101. After setting, the control panel 101 sends a heating command to the heating components. The heating chamber 7 has an inverted U-shaped cross-section and is slidably installed on the top of the testing frame 2. Its position can be adjusted along the top of the testing frame 2 according to the length of the rubber sample, ensuring that the heating chamber 7 completely covers the sample area inside the testing frame 2, forming a wrap-around heating space. The inner wall of the heating chamber 7 is synchronously powered on with the heat spreader 701 on the top of the main body 1. The heating tubes 702 on the outer wall of the heat spreader 701 start to heat up. The heat is quickly conducted through the heat spreader 701 and evenly diffused into the internal space of the heating chamber 7, avoiding local overheating or underheating. Temperature sensors 8 are symmetrically arranged on the inner walls at both ends of the heating chamber 7 to detect the temperature of different areas inside the chamber in real time and feed the temperature data back to the control panel 101 via wires. When the control panel 101 detects that the temperature inside the chamber has reached the preset target temperature, it automatically reduces the power of the heating tubes 702 to stabilize the temperature inside the heating chamber 7 within the target temperature range. If the temperature is lower than the target temperature, the control panel 101 increases the power of the heating tubes 702 to achieve precise temperature control. Throughout the tensile testing of the rubber sample, the heating component maintains a stable high-temperature environment, ensuring that the rubber sample is always under simulated actual high-temperature conditions. This provides realistic testing conditions for subsequent analysis of the impact of high-temperature environment on the tensile deformation properties of rubber. After the test is completed, the control panel 101 automatically cuts off the power to the heating tube 702. After the heating box 7 cools down with the testing frame 2, it can be slid away to remove the sample.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for testing the thermal tensile deformation rate of rubber for inner tubes, comprising a main body (1), a testing frame (2) on the top of the main body (1), and a control panel (101) on the side wall of the main body (1), characterized in that: The inner wall of the detection frame (2) is provided with a detection assembly for detecting rubber, the detection assembly comprises a stretching groove (201) formed in the inner wall of the detection frame (2), a moving seat (3) is slidably mounted on the inner wall of the stretching groove (201), and an outer wall of the detection frame (2) is provided with a heating assembly for heating rubber.

2. The device for testing the thermal tensile deformation rate of rubber for inner tubes according to claim 1, characterized in that: The whole detection frame (2) adopts a hollow square-shaped design, the stretching grooves (201) are symmetrically arranged on the inner walls of both sides of the detection frame (2), and the stretching grooves (201) are formed along the length direction of the detection frame (2).

3. The device for testing the thermal tensile deformation rate of rubber for inner tubes according to claim 2, characterized in that: Both ends of the moving seat (3) are respectively slidably connected with two groups of the stretching grooves (201), a displacement sensor (302) is arranged on the outer wall of the moving seat (3), clamps (303) are arranged on both the moving seat (3) and the inner wall of the end portion of the detection frame (2), a tension sensor (301) is arranged between the moving seat (3) and the clamp (303), and both the displacement sensor (302) and the tension sensor (301) are electrically connected with a control panel (101) through wires.

4. The device for testing the thermal tensile deformation rate of rubber for inner tubes according to claim 3, characterized in that: A driving screw (4) is rotatably mounted on the inner wall of the stretching groove (201), a driven bevel gear (401) is arranged at the end portion of the driving screw (4), and the moving seat (3) is in threaded connection with the driving screw (4).

5. The device for testing the thermal tensile deformation rate of rubber for inner tubes according to claim 2, characterized in that: A driving motor (6) is fixedly mounted on the outer wall of the detection frame (2), a driving bevel gear (601) is fixedly mounted at an output end of the driving motor (6), a linkage shaft (5) is rotatably mounted inside the detection frame (2), a driving bevel gear (501) and a linkage bevel gear (502) are arranged on an outer wall of the linkage shaft (5), the linkage shaft (5) is located at the end portion of the driving screw (4), the linkage shaft (5) is arranged perpendicular to the driving screw (4), and a length of the linkage shaft (5) is the same as a distance between two groups of the driving screws (4).

6. The device for testing the thermal tensile deformation rate of rubber for inner tubes according to claim 5, characterized in that: The driving bevel gears (501) are symmetrically arranged at two ends of the linkage shaft (5), the driving bevel gears (501) are in meshed connection with the driven bevel gears (401), the linkage bevel gear (502) is located between two groups of the driving bevel gears (501), and the linkage bevel gear (502) is in meshed connection with the driving bevel gear (601).

7. The device for testing the thermal tensile deformation rate of rubber for inner tubes according to claim 1, characterized in that: The heating assembly comprises a heating box (7) slidably mounted at the top of the detection frame (2), uniform heating plates (701) are respectively arranged on an inner wall of the heating box (7) and the top of the device main body (1), and heating pipes (702) are arranged on an outer wall of the uniform heating plates (701).

8. The device for testing the thermal tensile deformation rate of rubber for inner tubes according to claim 7, characterized in that: A cross section of the heating box (7) adopts an inverted U-shaped design, symmetrically distributed temperature sensors (8) are arranged on inner walls at two ends of the heating box (7), and the temperature sensors (8) are electrically connected with the control panel (101) through wires.

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