A rubber tensile properties testing mechanism

Abstract

The present invention provides a rubber tensile performance testing mechanism, which belongs to the technical field of rubber tensile strength testing; it includes a fixed frame installed on a mainframe platform, a sliding bracket is slidably connected to the fixed frame, a clamping component is installed on the side where the mainframe platform and the sliding bracket are close to each other, and also includes a posture limiting component for sending the rubber strip to be tested into the two clamping components in a straight state; the sliding bracket includes a T-shaped frame. The present invention realizes the function of not adjusting the posture of the rubber strip during the clamping process by setting the posture limiting component, and the rubber strip tends to be straight as a whole during the clamping process. At the same time, both ends of the clamped rubber strip are located in the clamp, which reduces the time required for the preparation of the rubber tensile performance test and improves the efficiency of the rubber tensile performance test. At the same time, the step of clamping the rubber strip in the posture limiting component can be performed synchronously during the previous rubber test process, further shortening the time required for the preparation work.

Description

Technical Field

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

[0002] Rubber products refer to the activities of producing various rubber products with natural and synthetic rubber as raw materials, and also include rubber products reproduced from waste rubber. When rubber products are molded, they are pressed under great pressure. Because the cohesive force of the elastomer cannot be eliminated, extremely unstable shrinkage often occurs when the product is molded and released from the mold. It takes a period of time before it can be stabilized. Therefore, when a rubber product is designed, no matter the formula or the mold, it must be carefully calculated and matched. Otherwise, it is easy to cause unstable product size and poor product quality. With the increasing use of technology and market demand for rubber products, they often need to be tested for tensile properties after production. The tensile test is to slowly pull a material sample under the action of an axial force until it breaks, and then test its tensile strength standard.

[0003] In order to improve the efficiency and safety of rubber testing, a Chinese patent with authorization announcement number CN220271023U discloses a rubber product tensile testing device, which uses two sets of clamps to clamp and fix the rubber products. When the transmission motor drives the lifting and displacement of the lifting screw rod, the rotational force can be converted into a lifting thrust, pushing the lifting slide to slide up, driving one set of clamps to move up, and performing tensile performance testing on the clamped rubber products. It replaces the traditional manual testing method, has simple, fast and efficient testing performance, can reduce the operating intensity of the staff, and save testing time.

[0004] Although the above-mentioned device replaces manual operation by setting a mechanical structure, in the actual detection process, because the rubber strip is a dumbbell-shaped thin sheet as a whole and has a certain length, it is easy to bend and deform after colliding with the clamp, and the bent and deformed rubber strip is not easy to insert into the clamp, so the rubber posture needs to be constantly adjusted during the clamping process. In order to ensure the accuracy of the measurement results, the fully clamped rubber strip needs to be straight as a whole, and both ends need to be located in the clamp, which further increases the difficulty of clamping the rubber strip and greatly affects the time required for the preparation of the rubber tensile properties test. Therefore, the present application provides a rubber tensile properties testing mechanism to meet the needs. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a rubber tensile performance testing mechanism to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A rubber tensile property testing mechanism, comprising a fixed frame mounted on a host platform, a sliding bracket slidably connected to the fixed frame, a clamping component mounted on one side of the host platform and the sliding bracket close to each other, and a posture limiting component for feeding a rubber strip to be tested into two clamping components in a straight state;

[0008] The sliding bracket comprises a T-shaped frame, and the T-shaped frame is lifted and lowered along the fixed frame through an electric drive device electrically connected to the host platform. The fixed frame is provided with a scale, and a pointer is installed on the T-shaped frame.

[0009] Preferably, the clamping component includes a clamping seat, and the clamping seat is installed on the side where the T-shaped frame and the main platform are close to each other. A clamping groove is opened on the front of the clamping seat, and a clamping block is eccentrically rotated in the clamping groove. The clamping seat and the side where the clamping block are close to each other are provided with matching anti-slip grooves, and the upper part of the clamping block close to the clamping seat is provided with a rounded corner, and a first retaining spring is provided at the rotational connection position between the clamping seat and the clamping block, and the first retaining spring is used to drive the clamping block to rotate and cooperate with the clamping seat to clamp the rubber strip to be tested.

[0010] Preferably, the posture limiting component includes a support back plate, a limiting groove matching the shape of the rubber strip to be tested is provided on the front side of the support back plate, a first chamfer is provided at the corner of the limiting groove close to the front side of the support back plate, a clamping plate is rotatably connected to one side of the support back plate, the middle part of the clamping plate is hollowed out and rotatably connected to a pressure roller, a second clamping spring is provided at the rotatable connection position between the support back plate and the clamping plate, the second clamping spring is used to drive the clamping plate so that the clamping plate drives the pressure roller to flatten the rubber strip to be tested in the limiting groove, and two clamping strips are rotatably connected to the bottom of the support back plate, The two clamping strips are adapted to the shapes of the corners on both sides of the clamping groove, and the back of the supporting back plate is provided with a clamping plate that can be clamped with the backs of the two clamping seats. The bottom of the clamping strip can be rotated to the side away from the clamping plate. When the clamping plate is in contact with the supporting back plate, the clamping plate is also in contact with the clamping strip to limit the rotation of the clamping strip. When the two clamping seats are located in the position for clamping the rubber strip to be tested, the supporting back plate can be fixed between the two clamping seats by the clamping plate and the clamping strip. In this state, the back of the limiting groove is flush with the back of the clamping groove, and the ends of both ends of the rubber strip to be tested are located in the clamping groove.

[0011] Preferably, at least one through groove is provided on the back of the clamping groove, the length of the clamping plate is shorter than the length of the supporting back plate, the top and bottom of the supporting back plate are both installed with end support plates adapted to the through groove, the top and bottom of the clamping plate are installed with spring pieces with a U-shaped cross-section, and an extension portion is provided on the side of the spring piece close to the end support plate, and when the clamping plate is in contact with the supporting back plate, the extension portion will limit the end of the rubber strip to be tested against the end support plate.

[0012] Preferably, the end of the extension portion is provided with an arc-shaped bend.

[0013] Preferably, the width of the extension portion is longer than half the width of the end portion of the rubber strip to be tested.

[0014] Preferably, a first magnetic strip and a second magnetic strip that attract each other are installed on the side where the support back plate and the clamping plate are close to each other, and the first magnetic strip and the second magnetic strip are located on the side of the limiting groove away from the rotational connection of the support back plate and the clamping plate.

[0015] Preferably, a fixed handle and an inclined pressing handle are respectively installed on the supporting back plate and the clamping plate, and the fixed handle and the pressing handle are both located on a side where the supporting back plate and the clamping plate are rotatably connected.

[0016] Preferably, a third chamfer is formed on one end of the clamping plate close to the clamping seat.

[0017] Preferably, a second chamfer is formed at one end of the clamping strip close to the clamping groove.

[0018] Preferably, a pressure rod is installed on a side of the clamping block away from the through slot.

[0019] Preferably, a stabilizing bar is also installed on the host platform, and the T-shaped frame is slidably connected to the stabilizing bar.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects:

[0021] In the above scheme, by setting the posture limiting component, it is achieved that there is no need to adjust the posture of the rubber strip during the clamping process, and the rubber strip tends to be straight as a whole during the clamping process. At the same time, both ends of the clamped rubber strip are located in the clamp, which reduces the time required for the preparation of the rubber tensile performance test and improves the efficiency of the rubber tensile performance test. At the same time, the step of clamping the rubber strip in the posture limiting component can be performed simultaneously with the previous rubber testing process, further shortening the time required for the preparation work.

[0022] By providing rounded corners, the width of the entrance formed between the clamping block and the clamping seat is increased, thereby improving the fault tolerance of the rubber strip assembly. Furthermore, when the clamping plate is opened and the supporting back plate is moved toward the back of the clamping seat, interference between the top of the clamping block and the rotating card strip caused by the corners of the clamping groove is avoided, thereby ensuring that the supporting back plate and the clamping plate can be stably removed from the clamping seat.

[0023] By arranging the spring sheet and the end support plate, when the clamping plate and the supporting back plate are fitted together, the spring sheet drives the extension part to cooperate with the end support plate to squeeze and limit the end of the rubber strip to be tested, thereby reducing the shaking amount of the end of the rubber strip to be tested during the assembly process; when the side of the spring sheet away from the clamping plate contacts the clamping block, the spring sheet is squeezed to produce elastic bending, and the end of the rubber strip to be tested is released for clamping the clamping block and the through groove, thereby ensuring that the end of the rubber strip to be tested is always supported during the clamping process, reducing the assembly error of the rubber strip to be tested, and improving the detection accuracy.

[0024] By setting the arc bend, the contact position between the extension part and the rubber strip to be tested is made smoother, the sliding friction between the end of the extension part and the rubber strip to be tested is reduced, and the spring sheet is prevented from being squeezed during the rotation of the clamping block, causing the end of the rubber strip to shrink. This ensures that the end of the rubber strip is always in a straight state during the assembly process, reduces the assembly error of the rubber strip to be tested, and improves the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0026] Figure 1 A schematic diagram of the three-dimensional structure of a rubber tensile performance testing mechanism when a posture limiting component is assembled;

[0027] Figure 2 It is a schematic diagram of the three-dimensional structure of the rubber tensile performance testing mechanism when the posture limiting components are removed;

[0028] Figure 3 It is a schematic diagram of the three-dimensional structure of the clamping seat and the T-shaped frame assembly;

[0029] Figure 4 for Figure 3 The enlarged structural diagram at A in the middle;

[0030] Figure 5 A schematic diagram of the three-dimensional structure when the posture limiting component is assembled with the rubber strip to be tested;

[0031] Figure 6 It is a schematic diagram of the three-dimensional structure when the posture limiting component is opened;

[0032] Figure 7 It is a schematic diagram of the three-dimensional structure of the clamping block.

[0033] [Reference Signs]

[0034] 1. Fixed frame; 2. Sliding bracket; 3. Clamping component; 4. Posture limiting component; 5. T-shaped frame; 6. Pointer; 7. Clamping seat; 8. Through slot; 9. Support back plate; 10. Limiting slot; 11. First chamfer; 12. Clamping plate; 13. Pressing roller; 14. Card plate; 15. Card strip; 16. Second chamfer; 17. First magnetic strip; 18. Second magnetic strip; 19. End support plate; 20. Spring piece; 21. Extension; 22. Stabilizing rod; 23. Third chamfer; 24. Fixed handle; 25. Pressing handle; 26. Clamping block; 27. Fillet; 28. Pressing rod; 29. ​​Clamping slot.

[0035] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0036] The following is a detailed description of a rubber tensile property testing mechanism provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0037] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0038] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0039] like Figure 1-Figure 6As shown, an embodiment of the present invention provides a rubber tensile performance testing mechanism, comprising a fixed frame 1 installed on a host platform, a sliding bracket 2 is slidably connected to the fixed frame 1, a clamping component 3 is installed on the side where the host platform and the sliding bracket 2 are close to each other, and also includes a posture limiting component 4 for feeding the rubber strip to be tested into the two clamping components 3 in a straight state; the sliding bracket 2 includes a T-shaped frame 5, and the T-shaped frame 5 is lifted and lowered along the fixed frame 1 through an electric drive device electrically connected to the host platform. The electric drive device can be a screw driven by a servo motor in the prior art. The T-shaped frame 5 is threadedly connected to the screw, and the rotation of the screw realizes the T-shaped frame 5. Lifting, a scale is set on the fixed frame 1, and a pointer 6 is installed on the T-shaped frame 5. The rubber stretching length is read by the scale pointed by the pointer 6; the clamping component 3 includes a clamping seat 7, and the clamping seat 7 is installed on the side where the T-shaped frame 5 and the main platform are close to each other. A clamping groove 29 is opened on the front of the clamping seat 7, and a clamping block 26 is eccentrically rotated in the clamping groove 29. The side where the clamping seat 7 and the clamping block 26 are close to each other is provided with mutually matching anti-slip grooves, and a rounded corner 27 is set above the side of the clamping block 26 close to the clamping seat 7. A first retaining spring (not shown in the figure) is provided at the rotation connection position between the clamping seat 7 and the clamping block 26. The first retaining spring is used to drive the clamping block 26 rotates and cooperates with the clamping seat 7 to clamp the rubber strip to be tested; the posture limiting component 4 includes a supporting back plate 9, a limiting groove 10 adapted to the shape of the rubber strip to be tested is opened on the front of the supporting back plate 9, and a first chamfer 11 is opened at the corner of the limiting groove 10 close to the front of the supporting back plate 9. A clamping plate 12 is rotatably connected to one side of the supporting back plate 9, and the middle part of the clamping plate 12 is hollowed out and rotatably connected to a pressure roller 13. A second retaining spring (not shown in the figure) is arranged at the rotational connection position between the supporting back plate 9 and the clamping plate 12. The second retaining spring is used to drive the clamping plate 12 so that the clamping plate 12 drives the pressure roller 13 to flatten the rubber strip to be tested in the limiting groove 10. The bottom of the supporting back plate 9 is rotatably connected There are two clamping strips 15, and the shapes of the two clamping strips 15 and the corners on both sides of the clamping groove 29 are adapted. The back of the support back plate 9 is provided with a clamping plate 14 which can be clamped with the back of the two clamping seats 7. The bottom of the clamping strip 15 can be rotated to the side away from the clamping plate 14. When the clamping plate 12 is in contact with the support back plate 9, the clamping plate 12 is also in contact with the clamping strip 15 to limit the rotation of the clamping strip 15. When the two clamping seats 7 are located in the position for clamping the rubber strip to be tested, the support back plate 9 can be fixed between the two clamping seats 7 by the clamping plate 14 and the clamping strip 15. In this state, the back of the limit groove 10 is flush with the back of the clamping groove 29, and the ends of both ends of the rubber strip to be tested are located in the clamping groove 29.

[0040] Before testing the tensile properties of the rubber, first open the clamping plate 12 and put the dumbbell-shaped rubber strip to be tested into the limiting groove 10. It should be noted that this operation does not require manual assembly of the rubber strip to be tested and the limiting groove 10. It is only necessary to ensure that the rubber strip to be tested is located within the horizontal projection range of the limiting groove 10 and the first chamfer 11. Then close the clamping plate 12. During this process, the pressure roller 13 will first contact with the rubber strip to be tested and squeeze the rubber strip to be tested, and guide the rubber strip to be tested through the first chamfer 11, so that when the clamping plate 12 is fitted with the supporting back plate 9, the rubber strip to be tested is squeezed into the limiting groove 10, and the pressure roller 13 and the limiting groove 10 cooperate to complete the posture fixation of the rubber strip to be tested, and then the supporting back plate 9 is clamped on the top of the clamping seat 7 on the host platform by the clamping plate 14 and the clamping strip 15, and the bottom end of the rubber strip to be tested faces the gap between the clamping block 26 and the clamping groove 29. Then, the height of the T-frame 5 is adjusted through the host platform until the clamping seat 7 on the T-frame 5 is clamped with the clamping plate 14 on the top of the supporting back plate 9, and the two clamping blocks 26 are rotated and swiveled, so that the two ends of the rubber strip to be tested are clamped and limited by the clamping blocks 26 and the clamping seat 7, and then the clamping plate 12 is opened to release the limit on the clamping strip 15 and move the supporting back plate 9 toward the back of the clamping seat 7 to separate the posture limiting component 4 from the rubber strip to be tested and remove it from the clamping component 3, so that the posture of the rubber strip does not need to be adjusted during the clamping process, and the rubber strip tends to be straight as a whole during the clamping process. At the same time, both ends of the clamped rubber strip are located in the fixture, which reduces the time required for the preparation of the rubber tensile performance test and improves the efficiency of the rubber tensile performance test. At the same time, the step of clamping the rubber strip in the posture limiting component 4 can be performed simultaneously during the previous rubber test process, further shortening the time required for the preparation work.

[0041] When the pressure roller 13 contacts the rubber strip to be tested, rolling friction occurs, so that the rubber strip to be tested moves more smoothly when guided by the first chamfer 11 and displaced, thereby preventing the rubber strip to be tested from being clamped between the pressure roller 13 and the first chamfer 11, thereby ensuring the correctness of the posture of the limited rubber strip.

[0042] By providing the rounded corners 27, the width of the entrance formed between the clamping block 26 and the clamping seat 7 is increased, thereby improving the fault tolerance of the rubber strip assembly. Furthermore, when the clamping plate 12 is opened and the support back plate 9 is moved toward the back of the clamping seat 7, interference between the top of the clamping block 26 and the rotating clamping strip 15 caused by the corners of the clamping groove 29 is avoided, thereby ensuring that the support back plate 9 and the clamping plate 12 can be stably removed from the clamping seat 7.

[0043] like Figure 4-Figure 6As shown, in this embodiment, at least one through groove 8 is opened on the back of the clamping groove 29, the length of the clamping plate 12 is shorter than the length of the supporting back plate 9, and the top and bottom of the supporting back plate 9 are each installed with at least one end support plate 19 adapted to the through groove 8, and the top and bottom of the clamping plate 12 are installed with a spring piece 20 with a U-shaped cross-section, and an extension portion 21 is provided on the side of the spring piece 20 close to the end support plate 19. When the clamping plate 12 is in contact with the supporting back plate 9, the extension portion 21 limits the end of the rubber strip to be tested to contact and position on the end support plate 19.

[0044] When the clamping plate 12 and the supporting back plate 9 are fitted together, the spring piece 20 drives the extending part 21 to cooperate with the end supporting plate 19 to squeeze and limit the end of the rubber strip to be tested, thereby reducing the amount of shaking of the end of the rubber strip to be tested during the assembly process; when the side of the spring piece 20 away from the clamping plate 12 contacts the clamping block 26, the spring piece 20 is squeezed to produce elastic bending, and the end of the rubber strip to be tested is released for clamping the clamping block 26 and the through groove 8, thereby ensuring that the end of the rubber strip to be tested is always supported during the clamping process, reducing the assembly error of the rubber strip to be tested, and improving the detection accuracy.

[0045] Furthermore, when the support back plate 9 is moved toward the back of the clamping seat 7, since the through groove 8 is provided on the clamping seat 7, it will not interfere with the movement of the support back plate 9 installed with the end support plate 19, thereby ensuring the stability of the device.

[0046] like Figure 6 As shown, in this embodiment, the end of the extension portion 21 is provided with an arc-shaped bend. The advantage of such a setting is that the contact position between the extension portion 21 and the rubber strip to be tested is made smoother by providing the arc-shaped bend, and the sliding friction between the contact position between the end of the extension portion 21 and the rubber strip to be tested is reduced, so as to avoid squeezing the spring piece 20 during the rotation of the clamping block 26 to cause the end of the rubber strip to contract, thereby ensuring that the end of the rubber strip is always in a straight state during the assembly process, reducing the assembly error of the rubber strip to be tested, and improving the detection accuracy.

[0047] like Figure 5 and Figure 6 As shown, in this embodiment, the width of the extension portion 21 is longer than half the width of the end portion of the rubber strip to be tested. The advantage of this arrangement is that the end portion of the rubber strip to be tested can be supported over a larger area through the cooperation between the extension portion 21 and the end support plate 19, so that the end portion of the rubber strip to be tested can be stretched out in a straight state during the assembly process, thereby improving the correctness of its posture during the assembly process.

[0048] like Figure 6As shown, in the present embodiment, a first magnetic strip 17 and a second magnetic strip 18 that attract each other are installed on the side where the support back plate 9 and the clamp plate 12 are close to each other, and the first magnetic strip 17 and the second magnetic strip 18 are located on the side of the limiting groove 10 away from the rotational connection between the support back plate 9 and the clamp plate 12. The advantage of such a configuration is that the movable ends of the support back plate 9 and the clamp plate 12 are tightly fitted under the action of the mutual suction force between the first magnetic strip 17 and the second magnetic strip 18, thereby ensuring the limiting stability of the clamping strip 15 by the clamp plate 12 and the limiting stability of the rubber strip to be tested in the limiting groove 10 by the pressure roller 13, thereby extending the service life of the posture limiting component 4.

[0049] like Figure 5 As shown, in the present embodiment, a fixed handle 24 and an inclined pressing handle 25 are respectively installed on the support back plate 9 and the clamp plate 12, and the fixed handle 24 and the pressing handle 25 are both located on one side of the rotational connection between the support back plate 9 and the clamp plate 12. By arranging the fixed handle 24 and the pressing handle 25, when opening the clamp plate 12 and the support back plate 9, it is only necessary to press the pressing handle 25 and the fixed handle 24 so that the pressing handle 25 drives the clamp plate 12 to rotate, thereby improving the operational convenience of opening the support back plate 9 and the clamp plate 12.

[0050] like Figure 5 As shown, in this embodiment, a third chamfer 23 is provided at one end of the clamping plate 14 close to the clamping seat 7. The advantage of this arrangement is that when the clamping plate 14 is clamped with the back of the through groove 8, it can be guided by the third chamfer 23, thereby improving the fault tolerance and increasing the convenience of clamping.

[0051] like Figure 6 As shown, in this embodiment, a second chamfer 16 is provided at one end of the card strip 15 close to the clamping groove 29. The clamping block 26 is provided to guide the insertion process of the card strip 15 into the clamping groove 29, thereby improving the fault tolerance and increasing the convenience of the card strip 15 plug-in operation.

[0052] like Figure 7 As shown, in this embodiment, a pressure rod 28 is installed on the side of the clamping block 26 away from the through slot 8. The pressure rod 28 is provided to improve the force effect of the clamping block 26 during operation, thereby increasing the convenience of operation of the clamping block 26.

[0053] like Figure 3 As shown, in this embodiment, a stabilizing rod 22 is also installed on the host platform, and the T-shaped frame 5 is slidably connected to the stabilizing rod 22. By setting the stabilizing rod 22 to limit and guide the T-shaped frame 5, the accuracy of the movement of the T-shaped frame 5 in the straight line direction is further improved, thereby improving the measurement accuracy.

[0054] According to the technical solution provided by the present invention, before testing the tensile properties of the rubber, the clamping plate 12 is first opened, and the dumbbell-shaped rubber strip to be tested is placed in the limiting groove 10. It should be noted that this operation does not require manual assembly of the rubber strip to be tested and the limiting groove 10. It is only necessary to ensure that the rubber strip to be tested is located within the horizontal projection range of the limiting groove 10 and the first chamfer 11, and then the clamping plate 12 is closed. During this process, the pressure roller 13 will first contact with the rubber strip to be tested and squeeze the rubber strip to be tested, and guide the rubber strip to be tested through the first chamfer 11, so that when the clamping plate 12 is fitted with the supporting back plate 9, the rubber strip to be tested is squeezed into the limiting groove 10, and the pressure roller 13 and the limiting groove 10 cooperate to complete the posture fixation of the rubber strip to be tested, and then the supporting back plate 9 is clamped on the upper side of the clamping seat 7 on the host platform by the clamping plate 14 and the clamping strip 15, and the bottom end of the rubber strip to be tested faces between the clamping block 26 and the clamping groove 29. The gap between the two ends of the T-shaped frame 5 is then adjusted through the host platform until the clamping seat 7 on the T-shaped frame 5 is clamped with the clamping plate 14 on the top of the supporting back plate 9, and the two clamping blocks 26 are rotated and swiveled so that the two ends of the rubber strip to be tested are clamped and limited by the clamping blocks 26 and the clamping seat 7. Subsequently, the clamping plate 12 is opened to release the limit on the clamping strip 15 and the supporting back plate 9 is moved toward the back direction of the clamping seat 7 to separate the posture limiting component 4 from the rubber strip to be tested and remove it from the clamping component 3, thereby realizing the function that the posture of the rubber strip does not need to be adjusted during the clamping process, and the rubber strip tends to be straight as a whole during the clamping process. At the same time, both ends of the clamped rubber strip are located in the fixture, which reduces the time required for the preparation of the rubber tensile performance test and improves the efficiency of the rubber tensile performance test. At the same time, the step of clamping the rubber strip in the posture limiting component 4 can be performed simultaneously during the previous rubber test process, further shortening the time required for the preparation work.

[0055] By providing the rounded corners 27, the width of the entrance formed between the clamping block 26 and the clamping seat 7 is increased, thereby improving the fault tolerance of the rubber strip assembly. Furthermore, when the clamping plate 12 is opened and the support back plate 9 is moved toward the back of the clamping seat 7, interference between the top of the clamping block 26 and the rotating clamping strip 15 caused by the corners of the clamping groove 29 is avoided, thereby ensuring that the support back plate 9 and the clamping plate 12 can be stably removed from the clamping seat 7.

[0056] When the clamping plate 12 and the supporting back plate 9 are fitted together, the spring piece 20 drives the extending part 21 to cooperate with the end supporting plate 19 to squeeze and limit the end of the rubber strip to be tested, thereby reducing the amount of shaking of the end of the rubber strip to be tested during the assembly process; when the side of the spring piece 20 away from the clamping plate 12 contacts the clamping block 26, the spring piece 20 is squeezed to produce elastic bending, and the end of the rubber strip to be tested is released for clamping the clamping block 26 and the through groove 8, thereby ensuring that the end of the rubber strip to be tested is always supported during the clamping process, reducing the assembly error of the rubber strip to be tested, and improving the detection accuracy.

[0057] Furthermore, when the support back plate 9 is moved toward the back of the clamping seat 7, since the through groove 8 is provided on the clamping seat 7, it will not interfere with the movement of the support back plate 9 installed with the end support plate 19, thereby ensuring the stability of the device.

[0058] By setting the arc-shaped bend, the contact position between the extension part 21 and the rubber strip to be tested is made smoother, and the sliding friction between the end of the extension part 21 and the rubber strip to be tested is reduced, so as to avoid squeezing the spring piece 20 during the rotation of the clamping block 26 to cause the end of the rubber strip to contract, thereby ensuring that the end of the rubber strip is always in a straight state during the assembly process, reducing the assembly error of the rubber strip to be tested, and improving the detection accuracy.

[0059] The present invention encompasses any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details.

[0060] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A rubber tensile properties testing mechanism, It is characterized in that include: A fixed frame (1) mounted on the host platform, a sliding bracket (2) being slidably connected to the fixed frame (1), a clamping component (3) being mounted on the side of the host platform and the sliding bracket (2) close to each other, and also comprising a posture limiting component (4) for feeding the rubber strip to be tested into the two clamping components (3) in a straight state; The sliding bracket (2) comprises a T-shaped frame (5), the T-shaped frame (5) is raised and lowered along the fixed frame (1) by an electric drive device electrically connected to the host platform, the fixed frame (1) is provided with a scale, and the T-shaped frame (5) is installed with a pointer (6); The clamping component (3) comprises a clamping seat (7), and the clamping seat (7) is installed on a side where the T-shaped frame (5) and the main machine platform are close to each other. A clamping groove (29) is provided on the front of the clamping seat (7), and a clamping block (26) is eccentrically rotated in the clamping groove (29). The sides where the clamping seat (7) and the clamping block (26) are close to each other are provided with anti-slip grooves that cooperate with each other, and a rounded corner (27) is provided above the side of the clamping block (26) close to the clamping seat (7). A first clamping spring is provided at the rotational connection position between the clamping seat (7) and the clamping block (26), and the first clamping spring is used to drive the clamping block (26) to rotate and cooperate with the clamping seat (7) to clamp the rubber strip to be tested; The posture limiting component (4) comprises a support back plate (9), a limiting groove (10) adapted to the shape of the rubber strip to be tested is provided on the front side of the support back plate (9), a first chamfer (11) is provided at the corner of the limiting groove (10) close to the front side of the support back plate (9), a clamping plate (12) is rotatably connected to one side of the support back plate (9), the middle part of the clamping plate (12) is hollowed out and rotatably connected to a pressure roller (13), a second clamping spring is provided at the rotatably connected position of the support back plate (9) and the clamping plate (12), the second clamping spring is used to drive the clamping plate (12) so that the clamping plate (12) drives the pressure roller (13) to flatten the rubber strip to be tested in the limiting groove (10), and the bottom of the support back plate (9) is rotatably connected to two clamping strips (15), the two clamping strips (15) are rotatably connected to the two clamping strips (15) The strip (15) and the clamping groove (29) are adapted in shape at the corners on both sides thereof; the back of the supporting back plate (9) is provided with a clamping plate (14) which can be clamped with the backs of the two clamping seats (7); the bottom of the clamping strip (15) can be rotated toward a side away from the clamping plate (14); when the clamping plate (12) is in contact with the supporting back plate (9), the clamping plate (12) is also in contact with the clamping strip (15) to limit the rotation of the clamping strip (15); when the two clamping seats (7) are located at a position for clamping the rubber strip to be tested, the supporting back plate (9) can be fixed between the two clamping seats (7) by the clamping plate (14) and the clamping strip (15); in this state, the back of the limiting groove (10) is flush with the back of the clamping groove (29), and the ends of both ends of the rubber strip to be tested are located in the clamping groove (29).

2. The rubber tensile properties testing mechanism according to claim 1, It is characterized in that At least one through slot (8) is provided on the back of the clamping slot (29); the length of the clamping plate (12) is shorter than the length of the supporting back plate (9); the top and bottom of the supporting back plate (9) are both provided with end supporting plates (19) adapted to the through slot (8); the top and bottom of the clamping plate (12) are provided with spring pieces (20) with a U-shaped cross section; an extension portion (21) is provided on a side of the spring piece (20) close to the end supporting plate (19); when the clamping plate (12) is in contact with the supporting back plate (9), the extension portion (21) causes the end of the rubber strip to be tested to contact and limit the end of the rubber strip on the end supporting plate (19).

3. The rubber tensile properties testing mechanism according to claim 2, It is characterized in that The end of the extension portion (21) is provided with an arc-shaped bend.

4. The rubber tensile properties testing mechanism according to claim 2, It is characterized in that The width of the extension portion (21) is longer than half the width of the end portion of the rubber strip to be tested.

5. The rubber tensile properties testing mechanism according to claim 1, It is characterized in that A first magnetic strip (17) and a second magnetic strip (18) that attract each other are installed on a side where the supporting back plate (9) and the clamping plate (12) are close to each other, and the first magnetic strip (17) and the second magnetic strip (18) are located on a side of the limiting groove (10) away from the rotational connection between the supporting back plate (9) and the clamping plate (12).

6. The rubber tensile properties testing mechanism according to claim 1, It is characterized in that A fixing handle (24) and an inclined pressing handle (25) are respectively mounted on the supporting back plate (9) and the clamping plate (12); the fixing handle (24) and the pressing handle (25) are both located on one side of the supporting back plate (9) and the clamping plate (12) being rotatably connected.

7. The rubber tensile properties testing mechanism according to claim 1, It is characterized in that A third chamfer (23) is formed on one end of the clamping plate (14) close to the clamping seat (7).

8. The rubber tensile properties testing mechanism according to claim 1, It is characterized in that A second chamfer (16) is formed at one end of the clamping strip (15) close to the clamping groove (29).

9. The rubber tensile properties testing mechanism according to claim 1, It is characterized in that A pressure rod (28) is installed on the side of the clamping block (26) away from the through slot (8).

10. The rubber tensile properties testing mechanism according to claim 1, It is characterized in that A stabilizing rod (22) is also installed on the host platform, and the T-shaped frame (5) is slidably connected to the stabilizing rod (22).

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