Rubber high-temperature stretching fatigue testing machine

Abstract

The utility model discloses a rubber high-temperature stretching fatigue testing machine, which comprises a machine base, a testing device, a torsion device, a lifting device and an operation panel, the testing device is arranged on the machine base, the testing device comprises a high-temperature box, a fan assembly and a heating wire, and a testing area and an installation area are arranged in the high-temperature box; the fan assembly and the heating wire are arranged in the installation area, and the installation area is provided with an air outlet channel and an air inlet channel; the air inlet channel and the air outlet channel are communicated with the test area; therefore, the heat of the heating wire is blown into the test area by the fan through the air outlet channel and flows back through the air inlet channel, so that the heat of the heating wire circulates in the high-temperature box to control the accuracy of the temperature in the high-temperature box.

Description

Technical Field

[0001] This utility model relates to the field of rubber high-temperature tensile fatigue testing machine technology, and in particular to a rubber high-temperature tensile fatigue testing machine. Background Technology

[0002] Currently, rubber is a latex derived from plants such as rubber trees and rubber grass. After processing, it has characteristics such as elasticity, insulation, and impermeability to water and air. Rubber products are widely used in various aspects of industry and daily life. Rubber has a variety of properties, and its relative rigidity in low-temperature environments is one of the important ones.

[0003] To detect the temperature rise and fatigue level of rubber under compression within a preset time, the rubber needs to be compressed at a certain frequency to measure the heat generation and fatigue deformation, which can then be used to analyze the rubber's compression performance and aging performance.

[0004] Rubber fatigue testing machines typically perform tensile tests at room temperature to determine the flexural cracking, crack enlargement, and tensile fatigue of rubber. Traditional rubber fatigue testing machines can only test rubber under normal or low temperature conditions, while rubber sealing materials used for hot water pipe and hot gas pipe interfaces typically operate in high-temperature environments.

[0005] Later, a rubber fatigue testing machine appeared on the market, which can conduct tensile fatigue tests on rubber in high-temperature or normal-temperature environments to measure the fatigue performance of rubber in high-temperature or normal-temperature environments. However, by lining the inner wall of the test chamber with a layer of thermal insulation cotton to ensure that the temperature inside the test chamber remains constant when simulating a high-temperature environment, the thermal insulation cotton layer will have a serious decrease in its thermal insulation effect after a long period of use, which will cause the temperature inside the test chamber to be unable to remain constant. This will result in poor accuracy of rubber test results and inability to measure accurate rubber sample data.

[0006] Therefore, a new technical solution needs to be researched to address the above problems. Utility Model Content

[0007] In view of the above, this utility model addresses the deficiencies of existing technologies, and its main objective is to provide a rubber high-temperature tensile fatigue testing machine. Through the design of the testing device, the testing device includes a high-temperature chamber, a fan assembly, and a heating wire. The high-temperature chamber has a testing area and a mounting area. The fan assembly and the heating wire are located in the mounting area, which is provided with an air outlet channel and an air inlet channel. The air inlet channel and the air outlet channel are connected to the testing area. Thus, the heat from the heating wire is blown into the testing area by the fan through the air outlet channel and then returned through the air inlet channel, allowing the heat from the heating wire to circulate within the high-temperature chamber, thereby controlling the accuracy of the temperature within the high-temperature chamber.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A rubber high-temperature tensile fatigue testing machine, comprising:

[0010] One base;

[0011] A testing device is mounted on a base. The testing device includes a high-temperature chamber, a fan assembly, and a heating wire. The high-temperature chamber has a testing area and an installation area. The fan assembly and the heating wire are located in the installation area, which has an air outlet channel and an air inlet channel. The air inlet channel and the air outlet channel are connected to the testing area.

[0012] A torsion device, comprising a clamp telescopic rod, a force sensor, and an upper clamp assembly and a lower clamp assembly for clamping the workpiece to be tested; the upper clamp assembly and the lower clamp assembly are arranged opposite each other on the clamp telescopic rod and located within the test area; the force sensor is disposed on the lower clamp assembly;

[0013] A lifting device includes a drive motor, a pulley assembly, and an adjusting assembly; the drive motor is driven and connected to the pulley assembly, the pulley assembly is driven and connected to the adjusting assembly, and the adjusting assembly is driven and connected to the clamp telescopic rod; the upper clamp assembly can selectively reciprocate up and down relative to the lower clamp assembly under the control of the lifting device.

[0014] An operation panel is mounted on the base and is electrically connected to the fan assembly, heating wire, force sensor, drive motor, and pitch adjustment assembly.

[0015] As a preferred embodiment, the pulley assembly includes a driven pulley, a driving pulley, and an eccentric pulley. The drive motor is connected to the driven pulley via a first synchronous belt; the driven pulley and the driving pulley are connected via a second synchronous belt; the eccentric pulley is driven to the driving pulley; and one end of the pitch adjustment assembly is driven to the eccentric pulley.

[0016] As a preferred embodiment, the adjusting assembly includes an eccentric push rod, an adjusting arm, and a linkage adjustment mechanism. One end of the eccentric push rod is connected to an eccentric wheel; the other end of the eccentric push rod is connected to a first bearing seat; the lower end of the clamp telescopic rod is connected to a second bearing seat; the adjusting arm is movably mounted on the linkage adjustment mechanism, and one end of the adjusting arm is connected to the first bearing seat, and the other end of the adjusting arm is connected to the second bearing seat; one end of the clamp telescopic rod is drively connected to the second bearing seat.

[0017] As a preferred embodiment, the linkage adjustment mechanism includes a slide rail, a servo motor, a planetary reducer, a slider, and an adjustable bearing. The slide rail extends in the front-to-back direction. An adjustable lead screw is provided on the slide rail. A first synchronous pulley is provided at one end of the adjustable lead screw.

[0018] The servo motor is mounted on one side of the slide rail, and the output end of the servo motor is driven and connected to the planetary reducer. The output end of the planetary reducer is driven and connected to the first synchronous pulley. The slider is slidably connected to the slide rail. The adjustable bearing is set on the slider. The adjustable swing arm is movably set on the adjustable bearing. The servo motor drives the adjustable lead screw to move and moves the slider along the extension direction of the slide rail, so that the adjustable swing arm swings relative to the adjustable bearing as the slider moves, thereby driving the upper clamping assembly to move up and down relative to the lower clamping assembly.

[0019] As a preferred embodiment, the upper clamping assembly includes a movable clamping plate and a plurality of upper clamping portions spaced apart on the movable clamping plate; the movable clamping plate is mounted on the clamping telescopic rod via a sliding member;

[0020] The lower clamping assembly includes a fixed clamping plate, a mounting plate, several lower clamping parts, and a connecting rod; the several clamping parts are spaced apart on the fixed clamping plate; the upper end of the connecting rod is connected to the lower clamping part, and the force sensor is located at the lower end of the connecting rod and is mounted on the mounting plate.

[0021] As a preferred embodiment, the torsion device further includes a guide rod, on which the upper clamping assembly and the lower clamping assembly are mounted; one end of the guide rod is fixed to the machine base; and the adjustable swing arm controls the upper clamping assembly to move up and down relative to the lower clamping assembly along the guide rod.

[0022] Compared with the prior art, this utility model has significant advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly achieves this through the design of a testing device. The testing device includes a high-temperature chamber, a fan assembly, and a heating wire. The high-temperature chamber has a testing area and an installation area. The fan assembly and the heating wire are located in the installation area, which is provided with an air outlet channel and an air inlet channel. The air inlet channel and the air outlet channel are connected to the testing area. In this way, the heat from the heating wire is blown into the testing area by the fan through the air outlet channel and flows back through the air inlet channel, allowing the heat from the heating wire to circulate within the high-temperature chamber. This controls the accuracy of the temperature within the high-temperature chamber, avoids the influence of changes in the external ambient temperature, and achieves accurate measurement of the heat generated by the rubber sample, thereby ensuring the accuracy of the rubber tensile fatigue test data.

[0023] Finally, the design of the force sensor is used. When the test sample is stretched up and down by the upper clamp assembly, if the force sensor cannot detect the force on the rubber sample, it can be determined that the test sample has broken, so as to analyze the tensile properties of the rubber.

[0024] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0025] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0026] Figure 2 This is a cross-sectional view of an embodiment of the present utility model;

[0027] Figure 3 This is a first structural schematic diagram of an embodiment of the present utility model;

[0028] Figure 4 This is a second structural schematic diagram of an embodiment of the present invention (upper clamp assembly in a descending state);

[0029] Figure 5 This is a third structural schematic diagram of an embodiment of the present utility model (initial state of the upper clamp assembly);

[0030] Figure 6 This is a structural diagram of the testing device according to an embodiment of the present invention;

[0031] Figure 7 This is a structural diagram of the adjustable distance component according to an embodiment of the present invention.

[0032] Explanation of reference numerals in the attached diagram:

[0033] 10. Base

[0034] 20. Testing apparatus 21. High-temperature chamber

[0035] 22. Fan assembly 23. Heating wire

[0036] 211. Testing Area; 212. Installation Area

[0037] 213. Air outlet duct 214. Air inlet duct

[0038] 30. Torsion device; 31. Clamp telescopic rod

[0039] 32. Force sensor; 33. Upper clamp assembly

[0040] 34. Lower clamp assembly

[0041] 331. Moving clamp plate; 332. Upper clamping part

[0042] 333. Sliding component

[0043] 341. Fixture plate; 342. Mounting plate

[0044] 343. Lower clamping part; 344. Connecting rod

[0045] 345. Guide rod

[0046] 40. Lifting device 41. Drive motor

[0047] 42. Pulley assembly 43. Adjustable distance assembly

[0048] 421. Driven pulley; 422. Driven pulley

[0049] 423. Eccentric pulley; 424. First synchronous belt

[0050] 425. Second synchronous belt

[0051] 431. Eccentric push rod; 432. Adjustable swing arm

[0052] 433. Linkage adjustment mechanism; 434. First bearing housing

[0053] 435. Second bearing housing

[0054] 4331, slide rail; 4332, servo motor

[0055] 4333, Planetary reducer; 4334, Slider

[0056] 4335, Adjustable pitch bearing; 4336, Adjustable pitch lead screw

[0057] 4337, First Synchronization Wheel 50, Operation Panel. Detailed Implementation

[0058] Please refer to Figures 1 to 7 As shown, it illustrates the specific structure of an embodiment of the present invention.

[0059] In the description of this utility model, it should be noted that the directional terms such as "up", "down", "front", "back", "left", and "right" indicate the orientation and positional relationship based on the accompanying drawings or the orientation or positional relationship shown when wearing and using the device normally. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0060] A rubber high-temperature tensile fatigue testing machine includes a base 10, a testing device 20, a torsion device 30, a lifting device 40, and an operation panel 50.

[0061] The testing device 20 is mounted on the base 10. The testing device 20 includes a high-temperature chamber 21, a fan assembly 22, and a heating wire 23. The high-temperature chamber 21 has a testing area 211 and an installation area 212. The fan assembly 22 and the heating wire 23 are located in the installation area 212. The installation area 212 is provided with an air outlet channel 213 and an air inlet channel 214. The air inlet channel 214 and the air outlet channel 213 are connected to the testing area 211. The fan assembly 22 includes a fan and a drive unit. The drive unit is exposed outside the high-temperature chamber 21, and the output end of the fan is located corresponding to the heating wire 23.

[0062] The torsion device 30 includes a clamp telescopic rod 31, a force sensor 32, and an upper clamp assembly 33 and a lower clamp assembly 34 for clamping the workpiece to be tested. The upper clamp assembly 33 and the lower clamp assembly 34 are arranged vertically opposite to each other on the clamp telescopic rod 31 and located within the test area 211. The force sensor 32 is disposed on the lower clamp assembly 34. Preferably, the upper clamp assembly 33 includes a movable clamp plate 331 and a plurality of upper clamping parts 332 spaced apart on the movable clamp plate 331. The movable clamp plate 331 is disposed on the clamp telescopic rod 31 via a sliding member 333.

[0063] The lower clamping assembly 34 includes a fixed clamping plate 341, a mounting plate 342, a plurality of lower clamping parts 343, and a connecting rod 344; the plurality of clamping parts are spaced apart on the fixed clamping plate 341; the upper end of the connecting rod 344 is connected to the lower clamping part 343, and the force sensor 32 is disposed at the lower end of the connecting rod 344 and disposed on the mounting plate 342.

[0064] Preferably, the torsion device 30 further includes a guide rod 345, and the upper clamping assembly 33 and the lower clamping assembly 34 are disposed on the guide rod 345; one end of the guide rod 345 is fixed to the base 10; the adjustable swing arm 432 controls the upper clamping assembly 33 to move up and down relative to the lower clamping assembly 34 along the guide rod 345.

[0065] The lifting device 40 includes a drive motor 41, a pulley assembly 42, and an adjusting assembly 43; the drive motor 41 is driven and connected to the pulley assembly 42, the pulley assembly 42 is driven and connected to the adjusting assembly 43, and the adjusting assembly 43 is driven and connected to the clamp telescopic rod 31; the upper clamp assembly 33 can selectively reciprocate up and down relative to the lower clamp assembly 34 under the control of the lifting device 40.

[0066] Preferably, the pulley assembly 42 includes a driven pulley 421, a driving pulley 422, and an eccentric pulley 423. The drive motor 41 is connected to the driven pulley 421 via a first synchronous belt 424. The driven pulley 421 and the driving pulley 422 are connected via a second synchronous belt 425. The eccentric pulley 423 is connected to the driving pulley 422. One end of the pitch adjustment assembly 43 is connected to the eccentric pulley 423.

[0067] Preferably, the adjusting assembly 43 includes an eccentric push rod 431, an adjusting arm 432, and a linkage adjustment mechanism 433. One end of the eccentric push rod 431 is connected to the eccentric wheel 423; the other end of the eccentric push rod 431 is connected to a first bearing seat 434; the lower end of the clamp telescopic rod 31 is connected to a second bearing seat 435; the adjusting arm 432 is movably mounted on the linkage adjustment mechanism 433, and one end of the adjusting arm 432 is connected to the first bearing seat 434, while the other end is connected to the second bearing seat 435; one end of the clamp telescopic rod 31 is drive-connected to the second bearing seat 435.

[0068] Preferably, the linkage adjustment mechanism 433 includes a slide rail 4331, a servo motor 4332, a planetary reducer 4333, a slider 4334, and an adjustable bearing 4335. The slide rail 4331 extends in the front-rear direction. An adjustable lead screw 4336 is provided on the slide rail 4331. A first synchronous pulley 4337 is provided at one end of the adjustable lead screw 4336.

[0069] The servo motor 4332 is mounted on one side of the slide rail 4331. The output end of the servo motor 4332 is driven and connected to the planetary reducer 4333. The output end of the planetary reducer 4333 is driven and connected to the first synchronous pulley 4337. The slider 4334 is slidably connected to the slide rail 4331. The pitch adjustment bearing 4335 is disposed on the slider 4334. The pitch adjustment swing arm 432 is movably disposed on the pitch adjustment bearing 4335. The servo motor 4332 drives the pitch adjustment screw 4336 to move, and in conjunction with the slider 4334, moves along the extension direction of the slide rail 4331, causing the pitch adjustment swing arm 432 to swing relative to the pitch adjustment bearing 4335 as the slider 4334 moves, thereby driving the upper clamping assembly 33 to move up and down relative to the lower clamping assembly 34. The output end of the planetary reducer is driven and connected to the second synchronous pulley, and the first synchronous pulley and the second synchronous pulley are driven and connected.

[0070] The operation panel 50 is mounted on the base 10 and is electrically connected to the fan assembly 22, heating wire 23, force sensor 32, drive motor 41, and pitch adjustment assembly 43. In this embodiment, the operation panel 50 has a built-in control program electrically connected to the fan assembly 22, heating wire 23, force sensor 32, drive motor 41, and pitch adjustment assembly 43. This operation panel 50 is a technology known in the art and will not be described in detail here.

[0071] The testing procedure for the test specimen in this embodiment is described in detail below:

[0072] First, clamp and fix the upper and lower ends of the test sample onto the upper clamping part 332 and the lower clamping part 343 respectively. After installing the test sample, close the door of the high-temperature chamber 21. Then, control the heating wire 23 to heat up through the operation panel 50, and drive the fan to blow the heat of the heating wire 23 from the air outlet 213 into the test area 211, and return it through the air inlet 214, so that the heat of the heating wire 23 circulates in the high-temperature chamber 21 until the temperature in the high-temperature chamber 21 reaches the set value. Then, drive the drive motor 41 to drive the pulley assembly 42 to drive the eccentric push rod 431 to move, and use the servo motor 4332 to drive the planetary reducer 4333 to transmit the pitch adjustment screw. The 4336 moves, and the slider 4334 moves along the extension direction of the slide rail 4331, causing the adjustable swing arm 432 to swing relative to the adjustable bearing 4335 as the slider 4334 moves (at this time, the adjustable swing arm 432 and the first bearing seat 434 are a lever), so as to drive the upper clamp assembly 33 to move up and down relative to the lower clamp assembly 34, thereby performing a tensile fatigue test on the test specimen. The force sensor 32 displays the data on the control panel. When the test specimen is stretched up and down by the upper clamp assembly 33, if the force sensor 32 does not sense the force of the rubber specimen, it can be determined that the test specimen has broken, so as to analyze the tensile properties of the rubber.

[0073] The key design feature of this invention lies in the design of the testing device, which includes a high-temperature chamber, a fan assembly, and a heating wire. The high-temperature chamber has a testing area and an installation area. The fan assembly and the heating wire are located in the installation area, which is equipped with an air outlet channel and an air inlet channel. The air inlet channel and the air outlet channel are connected to the testing area. In this way, the heat from the heating wire is blown into the testing area by the fan through the air outlet channel and then flows back through the air inlet channel, allowing the heat from the heating wire to circulate within the high-temperature chamber. This controls the accuracy of the temperature within the high-temperature chamber, avoids the influence of changes in the external ambient temperature, and enables precise measurement of the heat generated by the rubber sample, thereby ensuring the accuracy of the rubber tensile fatigue test data.

[0074] Finally, the design of the force sensor is used. When the test sample is stretched up and down by the upper clamp assembly, if the force sensor cannot detect the force on the rubber sample, it can be determined that the test sample has broken, so as to analyze the tensile properties of the rubber.

[0075] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A rubber high temperature elongation fatigue tester characterized by: It includes: A base; A test device, the test device is arranged on the base, the test device includes high temperature box, fan assembly and heating wire, the high temperature box has test area and installation area; The fan assembly and heating wire are arranged in the installation area, the installation area is provided with air outlet channel and air inlet channel; The air inlet channel and the air outlet channel are communicated with the test area; A torsion device, the torsion device includes a clamp telescopic rod, a force sensor and an upper clamp assembly and a lower clamp assembly for clamping a workpiece to be tested; The upper clamp assembly and the lower clamp assembly are arranged on the clamp telescopic rod in opposite directions and located in the test area; The force sensor is arranged on the lower clamp assembly; A lifting device, the lifting device includes a drive motor, a belt pulley assembly and a distance adjusting assembly; The drive motor is drivingly connected to the belt pulley assembly, the belt pulley assembly is drivingly connected to the distance adjusting assembly, and the distance adjusting assembly is drivingly connected to the clamp telescopic rod; The upper clamp assembly can selectively reciprocate up and down relative to the lower clamp assembly under the control of the lifting device; An operation panel, the operation panel is arranged on the base, and the operation panel is electrically connected to the fan assembly, the heating wire, the force sensor, the drive motor and the distance adjusting assembly.

2. The rubber high temperature elongation fatigue tester of claim 1, wherein: The belt pulley assembly includes a driven belt pulley, a driving belt pulley and an eccentric wheel, the drive motor is drivingly connected to the driven belt pulley through a first synchronous belt, the driven belt pulley is drivingly connected to the driving belt pulley through a second synchronous belt, the eccentric wheel is drivingly connected to the driving belt pulley, and one end of the distance adjusting assembly is drivingly connected to the eccentric wheel.

3. The rubber high temperature elongation fatigue tester of claim 2, wherein: The distance adjusting assembly includes an eccentric push rod, a distance adjusting swing arm and a linkage adjusting mechanism, one end of the eccentric push rod is connected to the eccentric wheel, the other end of the eccentric push rod is connected with a first bearing seat, the lower end of the clamp telescopic rod is connected with a second bearing seat, the distance adjusting swing arm is movably arranged on the linkage adjusting mechanism, one end of the distance adjusting swing arm is connected to the first bearing seat, the other end of the distance adjusting swing arm is connected to the second bearing seat, and one end of the clamp telescopic rod is drivingly connected to the second bearing seat.

4. The rubber high temperature elongation fatigue tester of claim 3, wherein: The linkage adjusting mechanism includes a slide rail, a servo motor, a planetary reducer, a sliding block and a distance adjusting bearing, the slide rail extends in the front-rear direction, the slide rail is provided with a distance adjusting screw rod, and one end of the distance adjusting screw rod is provided with a first synchronous wheel; The servo motor is mounted on one side of the slide rail, the output end of the servo motor is drivingly connected to the planetary reducer, the output end of the planetary reducer is drivingly connected to the first synchronous wheel, the sliding block is slidingly connected to the slide rail, the distance adjusting bearing is arranged on the sliding block, and the distance adjusting swing arm is movably arranged on the distance adjusting bearing; The servo motor drives the distance adjusting screw rod to move, and the sliding block moves along the extension direction of the slide rail in linkage, so that the distance adjusting swing arm swings relative to the distance adjusting bearing to drive the upper clamp assembly to move up and down relative to the lower clamp assembly.

5. The rubber high temperature elongation fatigue tester of claim 4, wherein: The upper clamp assembly includes a movable clamp plate and a plurality of upper clamping parts arranged on the movable clamp plate in a certain distance, and the movable clamp plate is arranged on the clamp telescopic rod through a sliding piece. The lower clamp assembly comprises a fixed clamp plate, a mounting plate, a plurality of lower clamping portions and a connecting rod. The plurality of clamping portions are arranged on the fixed clamp plate. The upper end of the connecting rod is connected to the lower clamping portion. The force sensor is arranged on the lower end of the connecting rod and on the mounting plate.

6. A rubber high temperature elongation fatigue testing machine according to claim 5, characterized in that: The torsion device further comprises a guide rod. The upper clamp assembly and the lower clamp assembly are arranged on the guide rod. One end of the guide rod is fixed to the machine base. The distance-adjusting swing arm controls the upper clamp assembly to ascend and descend relative to the lower clamp assembly along the guide rod.

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