Rubber fatigue tensile strength testing device

Abstract

The present invention proposes a rubber fatigue tensile strength detection device, which relates to the technical field of rubber performance detection. An upper fixed plate is arranged on a frame, a movable shaft is arranged on the upper fixed plate, and an upper fixed disk and a first adjusting device are arranged on the upper end of the upper fixed plate; a lower fixed plate is arranged on the upper fixed plate below the upper fixed plate; a rubber clamping mold is arranged on both the upper fixed plate and the lower fixed plate, and a tension sensor module is arranged between at least one of the upper fixed plate and the lower fixed plate and the rubber clamping mold on itself; a shaft is arranged on the frame, a linear slider is slidably arranged on the shaft, and the linear slider is connected to the movable shaft; the lower end of the movable shaft is rotatably connected to a connecting rod; a first motor is arranged on the frame, which is connected to a power shaft; the power shaft is connected to a rotating screw, and an adjusting block and a second adjusting device are arranged on the screw; the adjusting block is rotatably connected to the connecting rod; the first motor and the tension sensor module are both connected to a control module. The present invention can not only perform qualitative quality inspection on rubber materials, but also quantitatively characterize the fatigue tensile properties of rubber materials.

Description

Technical Field

[0001] The invention relates to the technical field of rubber performance detection, in particular to a rubber fatigue tensile strength detection device. Background Art

[0002] As a highly elastic polymer material with reversible deformation, rubber has been widely used due to its good elastic properties. In some important application fields, it is necessary to know the various properties of rubber materials, such as tensile strength, compression strength, bending strength, torsional strength, fatigue tensile strength, corrosion resistance, etc. When it is used in dynamic fields, it is necessary to know the fatigue tensile strength of rubber materials. Among them, the fatigue tensile strength of rubber materials is a quantitative analysis of how many times the rubber is stretched under a set stretching stroke before fatigue breaking, that is, the relationship between the stretching distance and the number of stretching times.

[0003] Common rubber fatigue tensile testing machines are mainly used to detect whether rubber materials are qualified under certain set conditions, that is, if the rubber does not break under a certain stretching distance and a certain number of reciprocating stretches, it means that the rubber is qualified. This method is to qualitatively characterize the fatigue tensile strength of rubber materials and is usually used for quality inspection.

[0004] The Chinese patent application with application number 201810113212.9 discloses a stroke adjustment structure of a high-low temperature rubber tensile fatigue testing machine, the stroke adjustment structure includes a cam, the cam is connected to a connecting rod, the middle of the connecting rod is connected to a bearing seat, the other end of the connecting rod is connected to a transmission rod, the bearing seat is connected to a slider, and the slider is connected to a screw. The stroke adjustment structure of the high-low temperature rubber tensile fatigue testing machine drives the cam to rotate through a power wheel. The rotation of the cam causes the connecting rod to swing up and down around the rotating axis of the bearing seat, thereby driving the transmission rod to move up and down, connecting the bearing seat to the slider, and using the screw to adjust the position of the slider to change the position of the bearing seat, and finally changing the tensile stroke during the test by changing the stroke of the transmission rod moving up and down. However, although it can change the tensile stroke of the rubber during the test, it still cannot specifically quantitatively or qualitatively characterize the fatigue tensile properties of the rubber.

[0005] Therefore, there is an urgent need for a convenient and fast testing device to quantitatively characterize the fatigue tensile strength of rubber materials. Summary of the invention

[0006] The invention provides a rubber fatigue tensile strength detection device, which solves the problem that the detection equipment in the prior art cannot quantitatively characterize the fatigue tensile strength of the rubber material.

[0007] The technical solution of the present invention is achieved in this way:

[0008] A rubber fatigue tensile strength detection device comprises a frame, an upper fixed plate is arranged on the frame, a movable shaft is movably arranged on the upper fixed plate, an upper fixed plate and a first adjusting device for adjusting the position of the upper fixed plate are arranged on the upper end of the movable shaft; a lower fixed plate is arranged on the upper fixed plate below the upper fixed plate; a rubber clamping mold is arranged on both the upper fixed plate and the lower fixed plate, and a tension sensor module is arranged between at least one of the upper fixed plate and the lower fixed plate and the rubber clamping mold on itself;

[0009] The frame is provided with a vertical shaft, the vertical shaft is slidably provided with a linear slider, the linear slider is connected to the moving shaft; the lower end of the moving shaft is rotatably connected to the connecting rod;

[0010] The frame is provided with a first motor, the output shaft of which is connected to the power shaft; the power shaft is connected to a rotating screw, which extends radially along the power shaft; the rotating screw is provided with an adjusting block and a second adjusting device for adjusting the position of the adjusting block; the adjusting block is rotatably connected to the connecting rod;

[0011] The first motor and the tension sensor module are both connected to the control module.

[0012] Furthermore, the adjustment block is sleeved on the rotating screw; the second adjustment device includes two second nuts, and the two second nuts are both screwed on the rotating screw; the adjustment block is clamped between the two second nuts.

[0013] Furthermore, the second adjusting device is a second motor, the second motor is arranged on the power shaft, the output shaft of the second motor is connected to the rotating screw; and the adjusting block is screwed on the rotating screw.

[0014] Furthermore, the lower end of the movable shaft is connected with a counterweight hinge block, and the linear slider is arranged on the counterweight hinge block;

[0015] The counterweight hinge block is provided with a rotating shaft, the rotating shaft is sleeved with a first bearing, and the upper end of the connecting rod is connected to the first bearing;

[0016] A second bearing is arranged at the lower end of the connecting rod, and the end of the adjusting block is arranged in the second bearing.

[0017] Furthermore, the movable shaft passes through the middle of the lower fixed plate and the middle of the upper fixed plate in sequence; the first adjustment device includes two first nuts, both of which are screwed on the movable shaft, and the upper fixed plate is clamped between the two first nuts.

[0018] Furthermore, a tension sensor module is arranged between the lower fixing plate and the rubber clamping mold thereon, and the upper fixing plate is directly connected to the rubber clamping mold thereon.

[0019] Furthermore, a motor support seat is arranged on the frame, and the first motor is arranged on the motor support seat.

[0020] Furthermore, a bracket is provided on the frame, a bearing seat is provided on the bracket, and the power shaft passes through the bearing seat.

[0021] Furthermore, the control module is arranged on the upper fixing plate.

[0022] Furthermore, the rotating screw is provided with a scale.

[0023] The beneficial effects of the present invention are:

[0024] The present invention can not only be used for qualitative inspection of rubber materials, but also can quantitatively characterize the fatigue tensile properties of rubber materials by using the tension sensor module in conjunction with the control module; in addition, it can also be used to analyze the relationship between the tensile speed, tensile stroke, and tensile force of rubber samples. The present invention has the characteristics of simple structure, easy implementation, safety and reliability, long service life, simple operation, and high detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 is a schematic diagram of the three-dimensional structure of the first embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of the forward structure of the first embodiment of the present invention;

[0028] Figure 3 is a schematic diagram of the lateral structure of the first embodiment of the present invention;

[0029] Figure 4 is a schematic diagram of a top view of the structure of the first embodiment of the present invention;

[0030] Figure 5 is a schematic cross-sectional structural diagram of the first embodiment of the present invention;

[0031] Figure 6 It is a schematic diagram of the lateral structure of the second embodiment of the present invention.

[0032] in:

[0033] 1. Frame; 2. Upper fixed plate; 3. Lower fixed plate; 4. Motor support seat; 5. First motor; 6. First nut; 7. Rotating shaft; 8. Upper fixed plate; 9. Lower fixed plate; 10. First bearing; 11. Control module; 12. Rubber sample; 13. Bracket; 14. Bearing seat; 15. Power shaft; 16. Rotating screw; 17. Second nut; 18. Adjustment block; 19. Second bearing; 20. Connecting rod; 21. Second motor; 22. Linear slider; 23. Counterweight hinge block; 24. Vertical shaft; 25. Moving shaft; 26. Tension sensor module; 27. Rubber clamping mold. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1

[0036] like Figure 1-5 As shown, the rubber fatigue tensile strength detection device in this embodiment includes a frame 1, and an upper fixing plate 2 is arranged on the frame 1.

[0037] See also Figure 1 and Figure 5 , a vertical movable shaft 25 is movably provided on the upper fixed plate 2, and an upper fixed disk 8 and a first adjusting device for adjusting the position of the upper fixed disk 8 are provided at the upper end of the movable shaft 25. A lower fixed disk 9 is provided on the upper fixed plate 2 below the upper fixed disk 8. In this embodiment, the movable shaft 25 passes through the middle part of the lower fixed disk 9 and the middle part of the upper fixed disk 8 in sequence. The first adjusting device includes two first nuts 6, and the two first nuts 6 are screwed on the movable shaft 25, and the upper fixed disk 8 is clamped between the two first nuts 6. The two first nuts 6 are connected to the movable shaft 25 by threads. By adjusting the two first nuts 6, the position of the upper fixed disk 8 on the movable shaft 25 can be adjusted, so as to adjust the distance between the upper fixed disk 8 and the lower fixed disk 9.

[0038] The upper fixed disk 8 and the lower fixed disk 9 are both provided with a rubber clamping mold 27, and the rubber piece to be measured is clamped between the upper and lower rubber clamping molds 27. In this embodiment, six rubber clamping molds 27 are respectively provided on the upper fixed disk 8 and the lower fixed disk 9. A tension sensor module 26 is provided between at least one of the upper fixed disk 8 and the lower fixed disk 9 and the rubber clamping mold 27 on itself. The tension sensor module 26 can measure the force applied to the rubber piece when it is stretched. The tension sensor module 26 can be provided on one side of the rubber piece, or on both sides of the rubber piece. In this embodiment, the tension sensor module 26 is provided on one side of the rubber piece and is provided on the lower fixed disk 9; that is, the tension sensor module 26 is provided between the lower fixed disk 9 and the rubber clamping mold 27 on itself, and the upper fixed disk 8 is directly connected to the rubber clamping mold 27 on itself.

[0039] See also Figure 2 , Figure 3 and Figure 5 , the frame 1 is provided with a vertical shaft 24, and two vertical shafts 24 are provided here, and a linear slider 22 is slidably provided on each of the vertical shafts 24, and the linear slider 22 is connected to a movable shaft 25. The lower end of the movable shaft 25 is rotatably connected to a connecting rod 20. In this embodiment, a counterweight hinge block 23 is connected to the lower end of the movable shaft 25, and the linear slider 22 is provided on the counterweight hinge block 23. A transverse rotating shaft 7 is provided on the counterweight hinge block 23, and a first bearing 10 is sleeved on the rotating shaft 7. The upper end of the connecting rod 20 is connected to the first bearing 10, so that the lower end of the movable shaft 25 is rotatably connected to the connecting rod 20.

[0040] The frame 1 is provided with a first motor 5, and here, the frame 1 is provided with a motor support seat 4, and the first motor 5 is provided on the motor support seat 4. The output shaft of the first motor 5 is connected with a horizontal power shaft 15; the frame 1 is provided with a bracket 13, and the bracket 13 is provided with a bearing seat 14, and the power shaft 15 is inserted into the bearing seat 14. The power shaft 15 is connected with a rotating screw 16, and the rotating screw 16 extends along the radial direction of the power shaft 15. Here, the rotating screw 16 is directly fixed to the power shaft 15, and the two are perpendicular to each other. The rotating screw 16 is provided with an adjustment block 18 and a second adjustment device for adjusting the position of the adjustment block 18. In this embodiment, the adjustment block 18 is sleeved on the rotating screw 16. The second adjustment device includes two second nuts 17, and the two second nuts 17 are both screwed on the rotating screw 16; the adjustment block 18 is sandwiched between the two second nuts 17. The two second nuts 17 are threadedly connected to the rotating screw 16, and the position of the adjusting block 18 on the rotating screw 16 can be adjusted by adjusting the two second nuts 17. The rotating screw 16 is provided with a scale, which can facilitate the understanding of the adjustment of the adjusting block. The adjusting block 18 is rotatably connected to the connecting rod 20. Here, the lower end of the connecting rod 20 is provided with a second bearing 19, and the end of the adjusting block 18 is arranged in the second bearing 19, so that the adjusting block 18 and the connecting rod 20 can rotate relative to each other.

[0041] In this embodiment, the lower end of the frame 1 has a lower fixing plate 3, and the vertical shaft 24, the motor support seat 4 and the bracket 13 are all fixed on the lower fixing plate 3, and the fixing with the frame 1 is achieved through the fixing plate.

[0042] The first motor 5 and the tension sensor module 26 are both connected to the control module 11, and the control module 11 can receive data collected by the tension sensor module 26 and control the operation of the first motor 5. In this embodiment, the control module 11 is disposed on the upper fixing plate 2.

[0043] When the present embodiment is working, when quantitative measurement is required, the rubber sample 12 to be tested is clamped between the upper and lower rubber clamping molds 27. The control module 11 controls the first motor 5 to work, driving the power shaft 15 to rotate, and the rotating screw 16 rotates accordingly, and the adjusting block 18 rotates with the axis of the power shaft 15 as the center of the circle. When the adjusting block 18 rotates, it drives the connecting rod 20, the counterweight hinge block 23 and the moving shaft 25 to reciprocate up and down; in this process, the linear slider 22 reciprocates along the vertical shaft 24 to limit the counterweight hinge block 23, ensuring that the counterweight hinge block 23 and the moving shaft 25 reciprocate in the vertical direction; at the same time, the connecting rod 20 will swing with the rotating shaft 7 as the axis. The vertical reciprocating motion of the moving shaft 25 drives the upper fixed plate 8 to reciprocate vertically, realizing repeated tensile testing of the rubber sample 12 to be tested. During the stretching process, the tension sensor measures the tension value and transmits the value to the control module 11. When the rubber sample 12 is broken due to fatigue, the tension sensor cannot measure the tension value and has no output signal; the control module 11 stops recording the number of stretching times of the rubber sample of the corresponding channel, thereby obtaining the maximum number of fatigue stretching times. In addition, the control module 11 can also record the stretching time to analyze the relationship between the stretching speed, stretching stroke, and tension of the rubber sample 12.

[0044] When the stretching distance needs to be adjusted, the position of the adjusting block 18 on the rotating screw 16 can be adjusted by adjusting the two second nuts 17, that is, the rotation radius of the adjusting block 18 when rotating with the axis of the power shaft 15 as the center is adjusted. After adjusting the position of the adjusting block 18 on the rotating screw 16, the connecting rod 20, the counterweight hinge block 23 and the moving shaft 25 will be displaced accordingly. At this time, the upper fixed plate 8 will also be displaced accordingly, resulting in a change in the original distance between the upper fixed plate 8 and the lower fixed plate 9. It is only necessary to adjust the two first nuts 6 and adjust the position of the upper fixed plate 8 on the moving shaft 25 to adjust the original distance between the upper fixed plate 8 and the lower fixed plate 9.

[0045] When this embodiment is used for quality inspection, quantitative measurement is not required; by setting the speed and running time of the first motor 5 through the control module 11, the rubber sample 12 can be qualitatively inspected. In practical applications, as needed, the upper fixed plate 8 and the lower fixed plate 9 can be designed into a single group or multiple groups of clamping stations to meet different inspection requirements. Increasing the number of clamping stations and increasing the speed of the first motor 5 can greatly improve the efficiency of inspection.

[0046] Embodiment 2

[0047] The structure of the rubber fatigue tensile strength detection device in this embodiment is basically the same as that of the embodiment 1, and the difference lies in the different setting of the second adjustment device.

[0048] See also Figure 6In this embodiment, the second adjusting device is a second motor 21, which is arranged on the power shaft 15, and the output shaft of the second motor 21 is connected to the rotating screw 16; the adjusting block 18 is screwed on the rotating screw 16, and the adjusting block 18 is threadedly connected with the rotating screw 16. When the second motor 21 rotates, the rotating screw 16 can be driven to rotate; since the adjusting block 18 is screwed on the rotating screw 16, and the adjusting block 18 is restricted by the connecting rod 20, so that the adjusting block 18 cannot rotate with the rotating screw 16, the adjusting block 18 will move along the rotating screw 16, so that the position of the adjusting block 18 on the rotating screw 16 is adjusted.

[0049] In this embodiment, the position of the adjustment block 18 is adjusted by electric adjustment, thereby reducing the labor intensity of the inspection personnel and improving the inspection efficiency.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A rubber fatigue tensile strength testing device, comprising a frame, on which an upper fixing plate is arranged, characterized in that: The upper fixed plate is movably provided with a movable shaft, and an upper fixed plate and a first adjusting device for adjusting the position of the upper fixed plate are provided at the upper end of the movable shaft; a lower fixed plate is provided on the upper fixed plate below the upper fixed plate; a rubber clamping mold is provided on both the upper fixed plate and the lower fixed plate, and a tension sensor module is provided between at least one of the upper fixed plate and the lower fixed plate and the rubber clamping mold on itself; The frame is provided with a vertical shaft, the vertical shaft is slidably provided with a linear slider, the linear slider is connected to the moving shaft; the lower end of the moving shaft is rotatably connected to the connecting rod; The frame is provided with a first motor, the output shaft of which is connected to the power shaft; the power shaft is connected to a rotating screw, which extends radially along the power shaft; the rotating screw is provided with an adjusting block and a second adjusting device for adjusting the position of the adjusting block; the adjusting block is rotatably connected to the connecting rod; The first motor and the tension sensor module are both connected to the control module; The adjusting block is sleeved on the rotating screw; the second adjusting device comprises two second nuts, both of which are screwed on the rotating screw; the adjusting block is sandwiched between the two second nuts; The second adjusting device is a second motor, the second motor is arranged on the power shaft, the output shaft of the second motor is connected to the rotating screw; the adjusting block is screwed on the rotating screw; It is characterized in that the lower end of the movable shaft is connected with a counterweight hinge block, and the linear slider is arranged on the counterweight hinge block; The counterweight hinge block is provided with a rotating shaft, the rotating shaft is sleeved with a first bearing, and the upper end of the connecting rod is connected to the first bearing; A second bearing is provided at the lower end of the connecting rod, and an end of the adjusting block is arranged in the second bearing; The movable shaft passes through the middle of the lower fixed plate and the middle of the upper fixed plate in sequence; the first adjusting device includes two first nuts, both of which are screwed on the movable shaft, and the upper fixed plate is clamped between the two first nuts; A tension sensor module is arranged between the lower fixing plate and the rubber clamping mold thereon, and the upper fixing plate is directly connected to the rubber clamping mold thereon; The frame is provided with a motor support seat, and the first motor is arranged on the motor support seat; The frame is provided with a bracket, the bracket is provided with a bearing seat, and the power shaft is passed through the bearing seat; The control module is arranged on the upper fixing plate; The rotating screw is provided with a scale.

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