A tensile testing device for rubber articles

Abstract

The application provides a stretching detection device for rubber products, and belongs to the technical field of rubber stretching detection. The device comprises a base, two groups of stand columns are symmetrically installed on the base, a movable plate is assembled between the stand columns, an upper clamp is fixedly connected to the outside of the movable plate, a lower clamp corresponding to the position of the upper clamp is fixedly connected to the base, a sliding seat is sleeved in the stand column, a rotating rod and a threaded rod are movably connected to the stand column through bearings, and a servo motor for driving the rotating rod and the threaded rod to rotate is fixedly connected to the top end of the stand column. The threaded seat, the sliding seat and the separation assembly are arranged, so that the device can quickly complete the resetting operation after completing the stretching detection of the rubber product, the working efficiency of the device is improved, and the friction between the threaded rod and the threaded seat is avoided during the resetting process, the friction loss of the device is reduced, and the service life of the device is indirectly prolonged.

Description

Technical Field

[0001] This invention relates to the field of rubber tensile testing technology, and in particular to a tensile testing device for rubber products. Background Technology

[0002] As an important industrial material, the mechanical property testing of rubber products, especially tensile strength testing, is a key link in quality control. After the product is manufactured, it is necessary to use a tensile testing device to perform tensile testing on the rubber products. Traditional rubber tensile testing devices use a mechanical thread transmission structure, which drives the clamp to move by rotating the screw, and the clamp is used to perform tensile testing on the rubber product sample.

[0003] However, such tensile testing devices still have certain shortcomings in actual use. First, after the tensile test is completed, the threaded transmission structure needs to reverse the screw multiple times to return the fixture to the initial position. The long reset time makes the overall testing efficiency of the device low and difficult to meet the needs of large-scale rubber testing. Second, long-term repeated threaded transmission will also cause mechanical wear of the threaded structure, affecting the transmission accuracy and thus reducing the reliability of the test data. It will also shorten the overall service life of the device. Therefore, this application provides a tensile testing device for rubber products to meet the requirements. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a tensile testing device for rubber products to solve the problems of long reset time and large mechanical wear of existing threaded transmission structures, which lead to a decrease in accuracy after long-term operation.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A tensile testing device for rubber products includes a base, two sets of columns symmetrically mounted on the base, a movable plate assembled between the columns, an upper clamp fixedly connected to the outside of the movable plate, a lower clamp corresponding to the position of the upper clamp fixedly connected to the base, a slide seat sleeved in each column, and a rotating rod and a threaded rod movably connected in each column via bearings. A servo motor for driving the rotating rod and the threaded rod to rotate is fixedly connected to the top of the column. Symmetrically distributed threaded seats are sleeved in the slide seat, electromagnets are symmetrically mounted on the outside of the threaded seats, and threaded grooves adapted to the shape of the threaded rod are formed on the threaded seats. A separation component is used to release the threaded connection between the threaded seats and the threaded rod, and the separation component is connected to the threaded seats. A locking component is used for locking and reinforcing when the threaded seats are attracted to each other, and the locking component is connected to the slide seat. A positioning component is used for buffering and positioning when the slide seat drives the movable plate to reset, and the positioning component is connected to the columns.

[0007] Optionally, a crossbeam is fixedly connected between the tops of the columns, and a vertical rod is fixedly connected between the crossbeam and the base. A thickness detector that can move up and down is sleeved on the outside of the vertical rod.

[0008] Optionally, the slide has a through opening for receiving the threaded seat, a positioning head is fixedly connected to the outside of the threaded seat, the slide has a telescopic opening that matches the size of the positioning head, and the inner sidewall of the slide has receiving cavities symmetrically distributed on both sides of the telescopic opening.

[0009] Optionally, the column has a slide rail that matches the shape of the slide block, the inner wall of the slide block has a guide groove, and guide blocks are symmetrically installed on the outer side of the threaded seat, with the guide blocks fitted into the guide groove.

[0010] Optionally, the drive shaft of the servo motor extends into the interior of the column and is fixedly connected to the top end of the threaded rod. The threaded rod is fixedly connected to the rotating rod, and the diameter of the rotating rod cross-section is greater than the diameter of the threaded rod cross-section.

[0011] Optionally, the separation assembly includes a support plate fixedly connected between the threaded seat and the inner sidewall of the slide. The support plate is symmetrically distributed on both sides of the positioning head, the support plate is S-shaped, and a second deformation zone is provided at the bend of the support plate.

[0012] Optionally, the locking assembly includes a fixing plate symmetrically distributed on the top and bottom of the slide block. A locking frame is fixedly connected to the fixing plate by a first elastic piece symmetrically distributed on the fixing plate. A locking post is fixedly connected to the locking frame in a uniformly distributed manner. A locking groove adapted to the shape of the locking post is opened on the outside of the threaded seat.

[0013] Optionally, the locking frame has a through opening in the middle that matches the shape of the slide, and a locking piece is fixedly connected at the corner of the locking frame. The height of the locking piece matches the length of the locking post. The bottom of the locking post has a chamfer, and the top of the locking groove has an arc surface.

[0014] Optionally, the positioning component includes a clearance area fixedly connected to the outside of the column, and a clearance groove is provided inside the column in the clearance area. A positioning piece corresponding to the junction position of the rotating rod and the threaded rod is fixedly connected in the clearance groove.

[0015] Optionally, one end of the positioning piece is fixedly connected to the inner wall of the clearance groove via a fixed end, and the other end of the positioning piece is provided with an open end. The middle part of the positioning piece is provided with a positioning area that matches the external shape of the positioning head. The connection between the positioning area and the fixed end is C-shaped and has a first deformation area.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] In the above solution, by setting up a threaded seat, a slide, and a separation component, the device can quickly complete the reset operation after completing the tensile test of the rubber product, thereby speeding up the overall working efficiency of the device. At the same time, no friction is generated between the threaded rod and the threaded seat during the reset process, reducing the frictional loss of the device and indirectly extending the service life of the device.

[0018] By incorporating an electromagnet, a threaded seat, and a locking assembly, the threaded seat of this device can be quickly attracted and fixed by the magnetism generated by the electromagnet when it is energized. Simultaneously, the magnetism drives the locking assembly to work synchronously, reinforcing the attracted state of the threaded seat. This satisfies the strength requirements for the threaded seat and the threaded rod to work together. The structure is simple and ingenious, and the device is stable and reliable during operation.

[0019] By setting the first elastic plate in the locking component and the support plate in the separation component, the threaded seat can switch states simply by controlling the electromagnet to be energized. After the electromagnet loses its magnetism, the first elastic plate can quickly drive the locking component to release its locked state, allowing the threaded seat to quickly separate by relying on the support plate. The structures cooperate with each other to complete the state switching operation of the threaded seat. The operation is simple, the response is fast, and it is easy for users to operate.

[0020] By setting up a positioning component, a buffer positioning is provided when the slide moves the movable plate to reset. It works in conjunction with the positioning head outside the threaded seat to provide a buffer for the falling of the threaded seat and the slide, while limiting the falling position of the slide and the threaded seat, so that their final falling position is consistent with the initial state of the device. This facilitates the subsequent tensile testing of other rubber products, making the entire device smooth and fast to use, and improving the overall working efficiency of the device. Attached Figure Description

[0021] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0022] Figure 1This is a three-dimensional structural diagram of a tensile testing device for rubber products.

[0023] Figure 2 This is a schematic diagram of the inner structure of the column;

[0024] Figure 3 This is a schematic diagram of a partial sectional view of the column structure;

[0025] Figure 4 Exploded view of the slide, threaded seat, and locking bracket;

[0026] Figure 5 for Figure 4 Enlarged structural diagram at point A in the middle;

[0027] Figure 6 A schematic diagram of the first-state structure of the slide, threaded seat, and threaded rod in mate.

[0028] Figure 7 A schematic diagram of the second-state structure of the sliding block, threaded seat, and threaded rod in mate.

[0029] Figure 8 This is a schematic diagram of the mating structure between the positioning head and the positioning plate;

[0030] Figure 9 This is a schematic diagram of the three-dimensional structure of the locking frame;

[0031] Figure 10 This is a schematic diagram of the three-dimensional structure of the threaded seat;

[0032] Figure 11 for Figure 10 Enlarged structural diagram at point B.

[0033] Figure label:

[0034] 1. Base; 2. Column; 3. Clearance area; 4. Servo motor; 5. Slide; 6. Movable plate; 7. Upper clamp; 8. Lower clamp; 9. Thickness detector; 10. Clearance groove; 11. Rotating rod; 12. Threaded rod; 13. Positioning piece; 14. Threaded seat; 15. Locking frame; 16. Fixed plate; 17. Telescopic opening; 18. Guide groove; 19. Storage cavity; 20. Positioning head; 21. Open end; 22. Positioning area; 23. Fixed end; 24. First deformation area; 25. First elastic piece; 26. Locking column; 27. Threaded groove; 28. Locking groove; 29. ​​Electromagnet; 30. Guide block; 31. Support piece; 32. Second deformation area; 33. Locking piece.

[0035] As shown in the figure, specific structures and devices are labeled in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0036] The tensile testing device for rubber products provided by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some known technologies; moreover, 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 use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

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

[0039] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0040] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0041] like Figures 1 to 11 As shown, an embodiment of the present invention provides a tensile testing device for rubber products, including a base 1, two sets of columns 2 symmetrically mounted on the base 1, a movable plate 6 assembled between the columns 2, an upper clamp 7 fixedly connected to the outside of the movable plate 6, and a lower clamp 8 fixedly connected to the base 1 corresponding to the position of the upper clamp 7. The upper clamp 7 and the lower clamp 8 are used to clamp and fix the upper and lower ends of the rubber product to be tested. During the subsequent operation of the tensile testing device, the rubber product clamped by the upper clamp 7 and the lower clamp 8 can be stretched by the rise of the movable plate 6. The principle and usage of the upper clamp 7 and the lower clamp 8 are the same as those of the prior art, and will not be described in detail here. A sliding seat 5 is sleeved in the column 2, and a rotating rod 11 and a threaded rod 12 are movably connected in the column 2 through a bearing. A drive is fixedly connected to the top of the column 2. The servo motor 4 rotates the rotating rod 11 and the threaded rod 12. The slide 5 is fitted with symmetrically distributed threaded seats 14. Electromagnets 29 are symmetrically installed on the outside of the threaded seats 14. The threaded seats 14 are provided with threaded grooves 27 that are adapted to the shape of the threaded rod 12. During the tensile test of rubber, the threaded seats 14 in the slide 5 can attract each other through the energized electromagnets 29, thereby splicing the two sets of threaded seats 14 together and fitting them on the outside of the threaded rod 12 through the threaded grooves 27. In this state, the threaded seats 14 and the threaded rod 12 form a threaded connection. During the rotation of the threaded rod 12, it can push the slide 5 to move on the column 2, thereby driving the movable plate 6 and the upper clamp 7 to move, and perform tensile testing on the rubber. The whole device is connected to a computer to record the various data of the entire tensile test of rubber.

[0042] The separation component is used to disconnect the threaded connection between the threaded seat 14 and the threaded rod 12. The separation component is connected to the threaded seat 14. After the threaded seat 14 and slide 5 complete the rubber tensile test by driving the movable plate 6 and upper clamp 7, the electromagnet 29 on the threaded seat 14 can be de-energized, and the separation component causes the threaded seat 14 to separate, disconnecting the threaded connection between the threaded seat 14 and the threaded rod 12. This allows the threaded seat 14 and slide 5 to quickly reset, rather than relying on the slow reset due to the reverse rotation of the threaded rod 12, ensuring overall testing efficiency and reducing wear between the threaded rod 12 and the threaded seat 14. The locking component is used to lock and reinforce the threaded seats 14 when they are attracted to each other. The locking component is connected to the slide 5. When the threaded seats 14 are attracted to each other by the magnetism of the electromagnet 29, the electromagnet 29... The magnetism also attracts the locking component, which in turn reinforces the mutually attracted threaded seats 14, thus ensuring that the threaded seats 14 remain in an attracted state during the rubber tensile test, ensuring the reliability of the threaded seats 14 during operation. The positioning component is used for buffer positioning when the slide 5 drives the movable plate 6 to reset. The positioning component is connected to the column 2. During the process of the threaded seats 14 being released from the attraction and the slide 5 and threaded seats 14 driving the movable plate 6 to reset quickly, the positioning component cooperates with the external structure of the threaded seats 14 to provide buffering for the falling of the threaded seats 14 and the slide 5, limiting the falling position of the slide 5 and the threaded seats 14, and keeping their final falling position consistent with the initial state of the device. This facilitates subsequent tensile testing of other rubber products, making the entire process of using the device smooth and fast, and improving the overall working efficiency of the device.

[0043] In this embodiment, as Figures 1 to 5As shown, a crossbeam is fixedly connected to the top of the column 2, and a vertical rod is fixedly connected between the crossbeam and the base 1. A thickness detector 9 that can move up and down is sleeved on the outside of the vertical rod. The thickness detector 9 can continuously detect the thickness value of the stretched rubber product during the rubber testing process, ensuring the data range that the whole device can collect. The principle and usage of this thickness detector 9 are the same as the existing technology, and will not be described in detail here. A through opening for receiving the threaded seat 14 is opened in the slide 5. A positioning head 20 is fixedly connected to the outside of the threaded seat 14. A telescopic opening 17 that matches the size of the positioning head 20 is opened on the slide 5, and receiving cavities 19 symmetrically distributed on both sides of the telescopic opening 17 are opened on the inner side wall of the slide 5. The through opening in seat 5 provides sufficient space for the storage and movement of threaded seat 14, allowing the threaded seat 14 to switch between two states. In the first state, the electromagnet 29 is energized, and the two sets of threaded seats 14 are attracted to each other under the magnetic action of the electromagnet 29. The end of the positioning head 20 is retracted into the telescopic opening 17. At the same time, the locking component is also affected by the magnetic action, locking and reinforcing the threaded seat 14. In the second state, neither the threaded seat 14 nor the locking component is affected by the magnetism of the electromagnet 29. The locking component separates from the threaded seat 14, releasing the locking and reinforcing state of the threaded seat 14. The threaded seats 14 are then separated by the separation component, and the positioning head 20 also extends out of the telescopic opening 17 along with the threaded seat 14.

[0044] In this embodiment, as Figures 2 to 7As shown, the column 2 has a slide rail that matches the shape of the slide block 5. The slide rail in the column 2 provides guidance and limitation for the displacement of the slide block 5 in the column 2. When the threaded seat 14 is fixed in the adsorption state, the threaded seat 14 and the threaded rod 12 are in a threaded connection state. The rotation of the threaded rod 12 can push the threaded seat 14 and the slide block 5 in the column 2 through the thread on its outside that matches the thread groove 27, thereby driving the movable plate 6 to rise and perform tensile testing on the rubber product. The inner side wall of the slide block 5 has a guide groove 18. The outer side of the threaded seat 14 is symmetrically equipped with guide blocks 30. The guide blocks 30 are sleeved in the guide groove 18. The cooperation between the guide blocks 30 and the guide groove 18 forms the connection between the threaded seat 14 and the slide block 5, providing guidance and limitation for the movement of the threaded seat 14 in the slide block 5. During the displacement movement of the threaded seat 14 in the slide block 5, it will move synchronously. The guide block 30 slides in the guide groove 18 and is limited by the guide block 30 and the guide groove 18. The drive shaft of the servo motor 4 extends into the interior of the column 2 and is fixedly connected to the top of the threaded rod 12. The threaded rod 12 is fixedly connected to the rotating rod 11. The diameter of the rotating rod 11 is larger than the diameter of the threaded rod 12. The servo motor 4 is used to drive the rotation of the threaded rod 12, which in turn drives the displacement of the threaded seat 14 and the slide 5, controlling the entire device to perform tensile testing of rubber products. The diameter relationship between the rotating rod 11 and the threaded rod 12 also allows the connection between the rotating rod 11 and the threaded rod 12 to limit the range of motion of the threaded seat 14 and the slide 5. By using the larger diameter of the rotating rod 11, the movement of the threaded seat 14 and the locking frame 15 is blocked, controlling their range of motion and ensuring that the threaded seat 14 always moves within the area where the threaded rod 12 exists.

[0045] In this embodiment, as Figures 4 to 7 as well as Figures 10 to 11As shown, the separation assembly includes a support plate 31 fixedly connected between the threaded seat 14 and the inner wall of the slide 5. The support plate 31 is symmetrically distributed on both sides of the positioning head 20. The support plate 31 is S-shaped, and a second deformation zone 32 is provided at the bend of the support plate 31. The opening of the second deformation zone 32 makes the thickness of the support plate 31 thinner and the strength weaker at the second deformation zone 32, making it easier to deform under external force. This guides the deformation state of the support plate 31 after being subjected to force, ensuring that the support plate 31 is in the receiving cavity 19 after deformation and reset, and avoiding misalignment of the support plate 31 during operation. When the electromagnet 29 is energized and generates magnetic force, the threaded seats 14 will approach each other and be attracted and fixed. At this time, the support plate 31 bends and deforms at the second deformation zone 32. The support plate 31 is in a stretched state and accumulates elastic potential energy. After the magnetism of the electromagnet 29 disappears, the locking component releases the locking reinforcement of the threaded seat 14, and the threaded seat 14 regains its mobility in the slide 5. At this time, the support plate 31 can drive the threaded seat 14 to reset through its accumulated elastic potential energy, thereby changing the positional relationship between the threaded seat 14 and the slide 5 from the first state to the second state, releasing the threaded connection between the threaded seat 14 and the threaded rod 12, so that the threaded seat 14 and the slide 5 will no longer be disconnected from the threaded rod 12 during the reset process, the reset speed is faster, and the threaded rod 12 will no longer generate frictional wear with the threaded seat 14 during the reset process, which indirectly improves the service life of both the threaded rod 12 and the threaded seat 14.

[0046] In this embodiment, as Figures 4 to 10As shown, the locking assembly includes fixed plates 16 symmetrically distributed on the top and bottom of the slide block 5. Symmetrically distributed first elastic plates 25 are fixedly connected to the side of the fixed plates 16 facing the slide block 5. A locking frame 15 is fixedly connected to the end of each first elastic plate 25. Evenly distributed locking pins 26 are fixedly connected to the side of the locking frame 15 facing the threaded seat 14. Both the locking frame 15 and the locking pins 26 are made of steel. On the one hand, they can be influenced by the magnetic effect of the electromagnet 29, thus forming a lock on the threaded seat 14 when the electromagnet 29 attracts the threaded seat 14. On the other hand, they have high strength, effectively ensuring the threaded seat 14 is locked. To ensure the stability of the threaded seat 14 during locking and prevent separation from the threaded rod 12, the threaded seat 14 has a locking groove 28 on its exterior that matches the shape of the locking pin 26. The locking frame 15 has a through opening in its middle that matches the shape of the slide block 5. A locking piece 33 is fixedly connected to the corner of the locking frame 15, and the height of the locking piece 33 matches the length of the locking pin 26. The bottom end of the locking pin 26 has a chamfer, and the top end of the locking groove 28 has an arc surface. The chamfer at the bottom end of the locking pin 26 reduces its area, while the arc surface at the top end of the locking groove 28 increases its opening size. This combination makes the insertion of the locking pin 26 into the locking groove 28 smoother, less prone to mutual collision, and facilitates the locking assembly to lock the threaded seat 14. When the electromagnet 29 is energized and generates magnetism, in addition to causing the threaded seats 14 to attract and fix each other, the magnetism also attracts the steel locking frame 15 and the locking pin 26, causing them to shift and allowing the locking pin 26 to insert into the locking groove 28 on the threaded seat 14. After the locking pin 26 is fully inserted into the locking groove 28, the threaded seat 14 and the locking frame 15 form a whole, thereby achieving the locking assembly to lock and reinforce the closed threaded seat 14. At the corner of the locking frame 15... The locking piece 33 follows the docking between the locking pin 26 and the locking groove 28, and simultaneously engages on the outside of the threaded seat 14. Together with the locking frame 15, it forms a wrap around the edge of the threaded seat 14, further enhancing the locking and reinforcement effect of the threaded seat 14. In the locked state, the first elastic piece 25 between the fixing plate 16 and the locking frame 15 is stretched and accumulates elastic potential energy. After the magnetism of the electromagnet 29 disappears, the locking frame 15 can drive the locking frame 15, the locking pin 26 and the threaded groove 27 to reset under its own elastic force, releasing the locking state of the threaded seat 14, allowing the threaded seat 14 to separate, and facilitating the quick reset of the threaded seat 14 and the slide 5.

[0047] In this embodiment, as Figures 2 to 3 as well as Figures 7 to 8As shown, the positioning component includes a clearance area 3 fixedly connected to the outside of the column 2. A clearance groove 10 is provided inside the column 2 in the clearance area 3. A positioning piece 13, corresponding to the junction of the rotating rod 11 and the threaded rod 12, is fixedly connected in the clearance groove 10. When the threaded seat 14 is in the second state, the positioning head 20 extends from the telescopic port 17. The clearance area 3 and the clearance groove 10 provide space for the positioning head 20 to move, preventing the extension of the positioning head 20 from obstructing the falling and resetting process of the threaded seat 14 and the slide 5. The positioning piece 13 is designed to cooperate with the positioning... Positioning head 20 positions the falling slide 5 and positioning piece 13, slowly dissipating their gravitational potential energy during the fall and achieving positioning. One end of positioning piece 13 is fixedly connected to the inner wall of clearance groove 10 via fixed end 23. The thickness of positioning piece 13 at fixed end 23 is greater than the thickness of other areas of positioning piece 13, ensuring the stability of the connection and fixation of positioning piece 13 to the inner wall of clearance groove 10. The other end of positioning piece 13 is provided with an open end 21, and the middle part of positioning piece 13 is provided with a shape similar to the outer shape of positioning head 20. The matching positioning area 22 has a C-shaped connection with the fixed end 23 and a first deformation area 24. During the process of the threaded seat 14 and the locking bracket 15 falling and resetting, the positioning head 20 extends out of the telescopic port 17. The end of the open end 21 is inclined away from the inner wall of the clearance groove 10 due to its open structure. At the same time, the outer side of the open end 21 is arc-shaped, forming a certain angle with the open end 21. When the threaded seat 14 and the slide 5 drive the positioning head 20 to contact the positioning piece 13, the open end 21 is subjected to the squeezing force of the positioning head 20. Then, friction occurs between the positioning head 20 and the positioning head 20, and corresponding deformation occurs, moving closer to the inner wall of the clearance groove 10 until the positioning head 20 moves to the positioning area 22 and is stuck by the positioning area 22 and cannot descend. During this process, the first deformation area 24 also relies on its own deformation to buffer the impact force brought by the positioning head 20, and after the impact force disappears, the shape of the entire positioning piece 13 is restored, forming a limit on the positioning head 20, so that the position of the slide 5 and the threaded seat 14 after resetting and falling is the same as the initial position of the device, which can quickly perform tensile testing on other rubber products.

[0048] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0049] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A tensile testing device for rubber products, comprising a base, two sets of columns symmetrically mounted on the base, a movable plate assembled between the columns, an upper clamp fixedly connected to the outside of the movable plate, and a lower clamp fixedly connected to the base corresponding to the position of the upper clamp, characterized in that, The column is fitted with a slide block, and a rotating rod and a threaded rod are movably connected in the column via bearings. A servo motor that drives the rotating rod and the threaded rod to rotate is fixedly connected to the top of the column. The slide block is fitted with symmetrically distributed threaded seats. Electromagnets are symmetrically installed on the outside of the threaded seats, and the threaded seats have threaded grooves that are adapted to the shape of the threaded rod. A separation assembly is used to disconnect the threaded connection between the threaded seat and the threaded rod, and the separation assembly is connected to the threaded seat; A locking component is used to lock and reinforce the threaded seats when they are attracted to each other, and the locking component is connected to the slide. A positioning component is used for buffer positioning when the slide moves the movable plate to reset, and the positioning component is connected to the column; The slide has a through opening for receiving the threaded seat, a positioning head is fixedly connected to the outside of the threaded seat, the slide has a telescopic opening that matches the size of the positioning head, and the inner sidewall of the slide has symmetrically distributed receiving cavities on both sides of the telescopic opening; The separation assembly includes a support plate that is fixedly connected between the threaded seat and the inner sidewall of the slide. The support plate is symmetrically distributed on both sides of the positioning head. The support plate is S-shaped, and a second deformation zone is provided at the bend of the support plate. The locking assembly includes fixed plates symmetrically distributed on the top and bottom of the slide block. A locking frame is fixedly connected to the outside of the fixed plates by symmetrically distributed first elastic pieces. Evenly distributed locking pins are fixedly connected to the locking frame. A locking groove adapted to the shape of the locking pin is opened on the outside of the threaded seat. The locking frame has a through opening in the middle that matches the shape of the slide block, and a locking piece is fixedly connected to the corner of the locking frame. The height of the locking piece matches the length of the locking pin. The bottom end of the locking pin is chamfered, and the top end of the locking groove is arc-shaped. The positioning component includes a clearance area fixedly connected to the outside of the column, and a clearance groove is provided inside the column in the clearance area. A positioning piece corresponding to the junction position of the rotating rod and the threaded rod is fixedly connected in the clearance groove.

2. The tensile testing device for rubber products according to claim 1, characterized in that, A crossbeam is fixedly connected between the tops of the columns, and a vertical rod is fixedly connected between the crossbeam and the base. A thickness detector that can move up and down is sleeved on the outside of the vertical rod.

3. The tensile testing device for rubber products according to claim 1, characterized in that, The column has a slide rail that matches the shape of the slide block. The inner side wall of the slide block has a guide groove. Guide blocks are symmetrically installed on the outer side of the threaded seat, and the guide blocks are fitted into the guide groove.

4. The tensile testing device for rubber products according to claim 1, characterized in that, The drive shaft of the servo motor extends into the interior of the column and is fixedly connected to the top of the threaded rod. The threaded rod is fixedly connected to the rotating rod, and the diameter of the rotating rod cross-section is greater than the diameter of the threaded rod cross-section.

5. The tensile testing device for rubber products according to claim 1, characterized in that, One end of the positioning piece is fixedly connected to the inner wall of the clearance groove through a fixed end, and the other end of the positioning piece is provided with an open end. The middle part of the positioning piece is provided with a positioning area that matches the external shape of the positioning head. The connection between the positioning area and the fixed end is C-shaped and has a first deformation area.

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