Stretching detection device for rubber products

Abstract

The invention provides a tensile detection device for a rubber product, and belongs to the technical field of rubber tensile detection. Comprising a base, two sets 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 outer portion of the movable plate, a lower clamp corresponding to the upper clamp in position is fixedly connected to the base, and sliding seats are arranged in the stand columns in a sleeved mode; a rotating rod and a threaded rod are movably connected into 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. Through the arrangement of the threaded seat, the sliding seat and the separation assembly, the whole device can rapidly complete reset operation after the device completes stretching detection of a rubber product, so that the working efficiency of the whole device is improved, meanwhile, friction between a threaded rod and the threaded seat cannot be generated in the reset process, the friction loss of the device is reduced, and the device is convenient to use. And the service life of the device is indirectly prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of rubber stretching detection, and in particular to a stretching detection device for rubber products. Background Art

[0002] As an important industrial material, rubber products’ mechanical property testing, especially tensile strength testing, is a key link in quality control. After product production, rubber products need to be subjected to tensile testing using a converted tensile testing device. Traditional rubber tensile testing devices use a mechanical threaded transmission structure, which drives the fixture to move by rotating the screw, and cooperates with the fixture to achieve tensile testing of rubber product specimens.

[0003] However, this type of tensile testing device still has certain shortcomings in actual use. First, after completing the tensile test, the threaded transmission structure needs to reverse the screw for multiple turns to return the fixture to its initial position. The long reset time makes the overall detection efficiency of the device low, and it is difficult to meet the needs of large-scale rubber testing. Secondly, long-term and repeated threaded transmission will also cause mechanical wear of the threaded structure, affecting the transmission accuracy, thereby reducing the reliability of the test data, and also shortening the service life of the entire device. Therefore, the present application provides a tensile testing device for rubber products to meet the needs. 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 of the existing thread transmission structure, large mechanical wear of the thread structure, and reduced accuracy after long-term work.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A tensile testing device for rubber products, comprising a base, two groups of columns are symmetrically mounted on the base, a movable plate is mounted between the 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 column, a rotating rod and a threaded rod are movably connected in the column through a bearing, a servo motor for driving the rotating rod and the threaded rod to rotate is fixedly connected to the top of the column, a symmetrically distributed threaded seat is sleeved in the slide, an electromagnet is symmetrically mounted on the outside of the threaded seat, and a thread groove matching the shape of the threaded rod is opened on the threaded seat; a separation component is used to release the threaded connection relationship between the threaded seat and the threaded rod, and the separation component is connected to the threaded seat; a locking component is used for locking and reinforcing when the threaded seats are mutually adsorbed, and the locking component is connected to the slide; a positioning component is used for buffering positioning when the slide drives the movable plate to reset, and the positioning component is connected to the column.

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

[0008] Optionally, a through opening for accommodating the threaded seat is formed in the sliding seat. A positioning head is fixedly connected to the outside of the threaded seat. An expansion opening adapted to the size of the positioning head is formed in the sliding seat, and accommodating cavities symmetrically distributed on both sides of the expansion opening are formed on the inner side wall of the sliding seat.

[0009] Optionally, a slideway adapted to the shape of the sliding seat is formed in the column. A guiding groove is formed on the inner side wall of the sliding seat. Guiding blocks are symmetrically installed on the outside of the threaded seat, and the guiding blocks are sleeved in the guiding groove.

[0010] Optionally, the driving 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 value of the cross section of the rotating rod is greater than the diameter value of the cross section of the threaded rod.

[0011] Optionally, the separation assembly includes support pieces fixedly connected between the threaded seat and the inner side wall of the sliding seat. The support pieces are symmetrically distributed on both sides of the positioning head. The support pieces are S-shaped, and a second deformation area is formed at the bending part of the support pieces.

[0012] Optionally, the locking assembly includes fixing plates symmetrically distributed at the top and bottom of the sliding seat. A first elastic piece is fixedly connected to the bottom end of the fixing plate. Uniformly distributed locking columns are fixedly connected to the bottom of the first elastic piece. A locking groove adapted to the shape of the locking columns is formed on the outside of the threaded seat.

[0013] Optionally, a through opening adapted to the shape of the sliding seat is formed in the middle of the locking frame. Locking pieces are fixedly connected to the corners of the locking frame. The height value of the locking pieces is adapted to the length value of the locking columns. A chamfer is provided at the bottom end of the locking columns, and an arc surface is formed at the top end of the locking groove.

[0014] Optionally, the positioning assembly includes an avoidance area fixedly connected to the outside of the column. An avoidance groove is formed in the interior of the column at the avoidance area. A positioning piece corresponding to the position of the intersection of the rotating rod and the threaded rod is fixedly connected in the avoidance groove.

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

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

[0017] In the above scheme, by setting the threaded seat, the sliding seat and the separation assembly, the device as a whole 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 between the threaded rod and the threaded seat will be generated during the reset process, thereby reducing the friction loss of the device and indirectly extending the service life of the device.

[0018] By arranging an electromagnet, a threaded seat and a locking assembly, the threaded seat of the device can be quickly adsorbed and fixed by relying on the magnetism generated by the electromagnet being energized. At the same time, the magnetism can be used to drive the locking assembly to work synchronously, thereby reinforcing the adsorption state of the threaded seat, thereby meeting the strength requirements for the coordinated work of the threaded seat and the threaded rod. The structure is simple and ingenious, and it is stable and reliable during operation.

[0019] By providing the first elastic sheet in the locking assembly and the supporting sheet in the separating assembly, the threaded seat only needs to control the power supply of the electromagnet during the state switching process. After the magnetism of the electromagnet disappears, the first elastic sheet can quickly drive the locking assembly to release its locked state, and the threaded seat can be quickly separated by relying on the supporting sheet. The structures cooperate with each other to complete the state switching operation of the threaded seat, which is simple to operate, quick to respond, and easy for users to operate.

[0020] By setting a positioning component, a buffer positioning is performed when the slide drives the movable plate to reset, and the positioning component cooperates 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, thereby facilitating the subsequent tensile testing of other rubber products, making the use of the entire device smooth and fast, and improving the overall work efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 1Schematic diagram of the three-dimensional structure of a stretching detection device for rubber products;

[0023] Figure 2 Schematic diagram of the inner structure of the column;

[0024] Figure 3 Schematic diagram of the partial sectional structure of the column;

[0025] Figure 4 Schematic diagram of the exploded structure of the sliding seat, threaded seat and locking frame;

[0026] Figure 5 is Figure 4 Enlarged structure diagram at position A in

[0027] Figure 6 Schematic diagram of the first state of the cooperation between the sliding seat, threaded seat and threaded rod;

[0028] Figure 7 Schematic diagram of the second state of the cooperation between the sliding seat, threaded seat and threaded rod;

[0029] Figure 8 Schematic diagram of the cooperation structure between the positioning head and the positioning piece;

[0030] Figure 9 Schematic diagram of the three-dimensional structure of the locking frame;

[0031] Figure 10 Schematic diagram of the three-dimensional structure of the threaded seat;

[0032] Figure 11 is Figure 10 Enlarged structure diagram at position B in

[0033] Reference numerals:

[0034] 1. Base; 2. Column; 3. Avoidance area; 4. Servo motor; 5. Sliding seat; 6. Movable plate; 7. Upper clamp; 8. Lower clamp; 9. Thickness detector; 10. Avoidance 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, in order to clearly implement the structure of the embodiments 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 this specific structure, device, and environment. Those of ordinary skill in the art can adjust or modify these devices and environments according to specific needs. Detailed implementation manners

[0036] The following describes in detail a tensile testing device for rubber products provided by the present invention with reference to the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specifically describing the embodiments and are not intended to specifically limit the present invention.

[0037] It should be pointed out that in the specification, the mention of "one embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc. indicates that the described embodiment may include specific features, structures, or characteristics, but not necessarily every embodiment includes such specific features, structures, or characteristics. Additionally, when combining embodiments to describe specific features, structures, or characteristics, implementing such features, structures, or characteristics in combination with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the relevant art.

[0038] Generally, terms can be understood at least in part from their use in context. For example, at least in part depending 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 can be used to describe a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey a set of exclusive factors, but rather, at least in part depending on the context, allowing for the existence of other factors that may not be explicitly described.

[0039] It can be understood that the meanings of "on...", "above...", and "over..." in the present invention should be interpreted in the broadest manner, such that "on..." not only means "directly on" something, but also includes the meaning of being "on" something with intervening features or layers therebetween, and "above..." or "over..." not only means "above" or "over" something, but also can include the meaning of being "above" or "over" something with no intervening features or layers therebetween.

[0040] In addition, spatial relative terms such as "under", "below", "lower part", "above", "upper part", etc. are used herein for convenience of description to describe the relationship between one element or feature and another or multiple elements or features, as shown in the drawings. The spatial relative terms are intended to cover different orientations during the use or operation of the device other than the orientation depicted in the drawings. The device can be oriented in other ways, and the spatial relative descriptors used herein can be similarly interpreted accordingly.

[0041] As Figures 1 to 11 shown, an embodiment of the present invention provides a tensile detection device for rubber products, including a base 1, two groups of columns 2 are symmetrically installed on the base 1, a movable plate 6 is assembled between the columns 2, an upper clamp 7 is fixedly connected to the outside of the movable plate 6, a lower clamp 8 corresponding to the position of the upper clamp 7 is fixedly connected to the base 1, 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 detected. During the subsequent overall operation of the tensile detection device, the rubber product clamped by the upper clamp 7 and the lower clamp 8 can be stretched by the upward movement of the movable plate 6. The principles and usage methods of the upper clamp 7 and the lower clamp 8 are the same as those of the prior art and will not be elaborated here. A sliding seat 5 is sleeved in the column 2, and a rotating rod 11 and a threaded rod 12 are movably connected to the column 2 through bearings. A servo motor 4 for driving the rotation of the rotating rod 11 and the threaded rod 12 is fixedly connected to the top of the column 2. Symmetrically distributed threaded seats 14 are sleeved in the sliding seat 5. Electromagnets 29 are symmetrically installed on the outside of the threaded seats 14, and threaded grooves 27 adapted to the shape of the threaded rod 12 are formed in the threaded seats 14. During the tensile detection of rubber, the threaded seats 14 in the sliding seat 5 can be adsorbed to each other through the energized electromagnets 29, and then the two groups of threaded seats 14 are spliced together and sleeved on the outside of the threaded rod 12 through the threaded grooves 27. In this state, a threaded connection relationship is formed between the threaded seat 14 and the threaded rod 12. During the rotation of the threaded rod 12, the sliding seat 5 can be pushed to displace in the column 2, and then the movable plate 6 and the upper clamp 7 are driven to displace for the tensile test of rubber. The whole device is externally connected to a computer to record various data of the whole rubber tensile test;

[0042] A separating component is used to release the threaded connection between the threaded seat 14 and the threaded rod 12. The separating component is connected to the threaded seat 14. The arrangement of the separating component enables the electromagnet 29 on the threaded seat 14 to be powered off after the threaded seat 14 and the sliding seat 5 drive the movable plate 6 and the upper fixture 7 to complete the tensile test of the rubber. Under the action of the separating component, the threaded seat 14 is separated, and the threaded connection between the threaded seat 14 and the threaded rod 12 is released, allowing the threaded seat 14 and the sliding seat 5 to quickly reset, rather than relying on the reverse rotation of the threaded rod 12 to slowly reset. This ensures the overall detection efficiency of the shape and reduces the wear between the threaded rod 12 and the threaded seat 14. A locking component is used for locking and strengthening when the threaded seats 14 are adsorbed to each other. The locking component is connected to the sliding seat 5. When the threaded seats 14 are adsorbed and close to each other through the magnetism of the electromagnet 29, the magnetism of the electromagnet 29 also attracts the locking component, and then drives the locking component to strengthen the mutually adsorbed threaded seats 14, so as to ensure that the threaded seat 14 remains in an adsorbed state during the rubber tensile test and ensure the reliability of the threaded seat 14 during operation. A positioning component is used for buffering and positioning when the sliding seat 5 drives the movable plate 6 to reset. The positioning component is connected to the column 2. The positioning component can cooperate with the structure outside the threaded seat 14 during the process of the threaded seat 14 releasing adsorption fixation and the sliding seat 5 and the threaded seat 14 driving the movable plate 6 to quickly reset, provide buffering for the falling of the threaded seat 14 and the sliding seat 5, limit the falling position of the sliding seat 5 and the threaded seat 14, and keep its final falling position consistent with the initial state of the device, so as to facilitate subsequent tensile tests of other rubber products and make the use process of the whole device smooth and fast, improving the overall working efficiency of the device.

[0043] In this embodiment, as Figures 1 to 5As shown, a crossbeam is fixedly connected between the tops of the columns 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 outside the vertical rod. During the rubber detection process, the thickness detector 9 can continuously detect the thickness value of the stretched rubber product to ensure the data range that the overall device can collect. The principle and usage method of this thickness detector 9 are the same as those of the prior art and will not be elaborated here. A through opening for accommodating the threaded seat 14 is provided in the sliding seat 5. A positioning head 20 is fixedly connected to the outside of the threaded seat 14. An expansion port 17 adapted to the size of the positioning head 20 is provided on the sliding seat 5, and receiving cavities 19 symmetrically distributed on both sides of the expansion port 17 are provided on the inner side wall of the sliding seat 5. The through opening provided in the sliding seat 5 provides sufficient space for the accommodation and movement of the threaded seat 14, so that the threaded seat 14 can be switched between two states. In the first state, the electromagnet 29 is energized, and the two threaded seats 14 are attracted and contacted with each other under the magnetic action of the electromagnet 29. The end of the positioning head 20 retracts into the expansion port 17. At the same time, the locking assembly is also affected by the magnetic action to lock and reinforce the threaded seat 14. In the second state, the threaded seat 14 and the locking assembly are not affected by the magnetism of the electromagnet 29. The locking assembly is separated from the threaded seat 14 to release the locked and reinforced state of the threaded seat 14. The threaded seat 14 is separated from each other under the influence of the separating assembly, and the positioning head 20 also extends out of the expansion port 17 following the threaded seat 14.

[0044] In this embodiment, as Figures 2 to 7As shown, a slideway adapted to the shape of the slide block 5 is provided in the column 2. The slideway provided in the column 2 provides guidance and limitation for the displacement of the slide block 5 in the column 2. In the state where the threaded seat 14 is adsorbed and fixed, 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 to displace in the column 2 through the thread adapted to the thread groove 27 on its outer side, and then drive the movable plate 6 to rise and perform the tensile test of rubber products. A guide groove 18 is provided on the inner side wall of the slide block 5, and guide blocks 30 are symmetrically installed on the outer side of the threaded seat 14. The guide blocks 30 are sleeved in the guide groove 18. The cooperation between the guide blocks 30 and the guide groove 18 forms an associated 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 process of the threaded seat 14 displacing and moving in the slide block 5, the guide blocks 30 will be driven to slide in the guide groove 18 synchronously. Limited by the guide blocks 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 end of the threaded rod 12. The threaded rod 12 is fixedly connected to the rotating rod 11. The diameter value of the cross section of the rotating rod 11 is greater than the diameter value of the cross section of the threaded rod 12. The servo motor 4 is used to drive the rotation of the threaded rod 12, and then drive the displacement of the threaded seat 14 and the slide block 5, controlling the entire device to perform the tensile test of rubber products. The relationship between the diameter values of the rotating rod 11 and the threaded rod 12 enables the connection between the rotating rod 11 and the threaded rod 12 to also play a role in limiting the movement range of the threaded seat 14 and the slide block 5. Through the larger diameter value of the cross section of the rotating rod 11, the movement of the threaded seat 14 and the locking frame 15 is blocked, controlling their movement range, and ensuring that the threaded seat 14 always moves in the area where the threaded rod 12 exists.

[0045] In this embodiment, as Figures 4 to 7 and Figures 10 to 11As shown, the separation component includes a support piece 31 fixedly connected between the inner side wall of the threaded seat 14 and the sliding seat 5. The support pieces 31 are symmetrically distributed on both sides of the positioning head 20. The support piece 31 is S-shaped, and a second deformation area 32 is provided at the bending part of the support piece 31. The opening of the second deformation area 32 makes the thickness value of the support piece 31 thinner and the strength weaker at the second deformation area 32, and it is easier to deform under the action of an external force, thereby guiding the deformation state of the support piece 31 after being stressed, ensuring that the support piece 31 is in the receiving cavity 19 after deformation and reset, and avoiding the situation of dislocation of the support piece 31 during the working process. When the electromagnet 29 is energized and generates a magnetic force, the threaded seats 14 will approach and adsorb and fix each other. At this time, the support piece 31 bends and deforms at the second deformation area 32, and the whole support piece 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 and reinforcement of the threaded seat 14, and the threaded seat 14 resumes its mobility in the sliding seat 5. At this time, the support piece 31 can drive the threaded seat 14 to reset through the elastic potential energy accumulated by itself, so that the positional relationship between the threaded seat 14 and the sliding seat 5 is converted from the first state to the second state, and the threaded connection between the threaded seat 14 and the threaded rod 12 is released, so that the threaded seat 14 and the sliding seat 5 will no longer be disengaged from the threaded rod 12 during the reset process, the reset speed is faster, and there will be no more frictional loss between the threaded rod 12 and the threaded seat 14 during the reset process, indirectly improving the service lives 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 a fixing plate 16 symmetrically distributed at the top and bottom of the slide seat 5, the bottom end of the fixing plate 16 is fixedly connected to a first elastic sheet 25, and the bottom of the first elastic sheet 25 is fixedly connected to a uniformly distributed locking column 26. The first elastic sheet 25 and the locking column 26 are both made of steel. On the one hand, they can be affected by the magnetic effect of the electromagnet 29, so as to cooperate with the electromagnet 29 to lock the threaded seat 14 when the threaded seat 14 is mutually adsorbed. On the other hand, they have high strength. After the threaded seat 14 is locked, the stability of the locking of the threaded seat 14 can be effectively guaranteed to prevent the threaded seat 14 from cooperating with the threaded rod 12. Separation occurs during the working process, and a locking groove 28 that matches the shape of the locking column 26 is provided on the outside of the threaded seat 14, and a through opening that matches the shape of the sliding seat 5 is provided in the middle of the locking frame 15, and a locking piece 33 is fixedly connected to the corner of the locking frame 15, and the height value of the locking piece 33 matches the length value of the locking column 26. The bottom end of the locking column 26 is provided with a chamfer, and the top of the locking groove 28 is provided with an arc surface. The chamfer at the bottom end of the locking column 26 makes the bottom end area of the locking column 26 smaller, and the arc surface at the top end of the locking groove 28 makes the opening at the top end of the locking groove 28 larger. The combination of the two makes the locking column 26 move toward the locking groove 28. The insertion is smoother and less likely to collide with each other, which makes it easier for the locking assembly to lock the threaded seat 14. When the electromagnet 29 is energized to generate magnetism, in addition to driving the threaded seats 14 to be adsorbed and fixed to each other, the magnetism also attracts the locking frame 15 and the locking column 26 made of steel, thereby causing the locking frame 15 and the locking column 26 to move, allowing the locking column 26 to be inserted into the locking groove 28 on the threaded seat 14. After the locking column 26 completely enters the locking groove 28, the threaded seat 14 and the locking frame 15 form a whole, thereby realizing the locking reinforcement of the closed threaded seat 14 by the locking assembly, and the locking piece 33 at the corner of the locking frame 15 follows the lock The butt joint between the tightening column 26 and the locking groove 28 is synchronously engaged with the outer side of the threaded seat 14, and cooperates with the locking frame 15 to form a wrap around the edge position of the threaded seat 14, further enhancing the locking and reinforcement effect of the threaded seat 14. In the locked state, the first elastic sheet 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 column 26 and the threaded groove 27 to reset under the action of its own elastic force, thereby releasing the locking state of the threaded seat 14, allowing the threaded seat 14 to be separated, and facilitating the rapid reset of the threaded seat 14 and the sliding seat 5.

[0047] In this embodiment, if Figures 2 to 3 as well as Figures 7 to 8As shown, the positioning assembly includes an avoidance area 3 fixedly connected to the outside of the column 2. An avoidance groove 10 is formed inside the column 2 at the position of the avoidance area 3. A positioning piece 13 corresponding to the connection position of the rotating rod 11 and the threaded rod 12 is fixedly connected in the avoidance groove 10. When the threaded seat 14 is in the second state, the positioning head 20 will protrude from the telescopic opening 17. The openings of the avoidance area 3 and the avoidance groove 10 are both provided to provide a moving space for the positioning head 20, avoiding the obstruction of the protrusion of the positioning head 20 to the falling and resetting processes of the threaded seat 14 and the sliding seat 5. The setting of the positioning piece 13 can cooperate with the positioning head 20 to position the falling sliding seat 5 and the positioning piece 13, slowly consume the gravitational potential energy during their falling process, and can form a positioning. One end of the positioning piece 13 is fixedly connected to the inner side wall of the avoidance groove 10 through a fixed end 23. The thickness value of the positioning piece 13 at the fixed end 23 is greater than the thickness values of other areas on the positioning piece 13, which can ensure the stability of the connection and fixation of the positioning piece 13 on the inner wall of the avoidance groove 10. And the other end of the positioning piece 13 is provided with an open end 21. A positioning area 22 adapted to the external shape of the positioning head 20 is arranged in the middle of the positioning piece 13. The connection between the positioning area 22 and the fixed end 23 is in a C shape and is provided with a first deformation area 24. During the falling and resetting processes of the threaded seat 14 and the locking frame 15, the positioning head 20 protrudes from the telescopic opening 17. Since the end of the open end 21 is of an open structure, it is inclined towards the direction away from the inner side wall of the avoidance groove 10. At the same time, the outside of the open end 21 is arc-shaped, forming a certain angle with the open end 21. When the threaded seat 14 and the sliding seat 5 drive the positioning head 20 to contact the positioning piece 13, the open end 21 is subjected to the extrusion force of the positioning head 20, and then generates friction with the positioning head 20 and undergoes corresponding deformation, approaching the inner wall of the avoidance 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 for the positioning head 20, so that the positions of the sliding seat 5 and the threaded seat 14 after falling and resetting are the same as the initial positions of the device, and subsequent stretching tests of other rubber products can be quickly carried out.

[0048] The present invention covers any substitutions, modifications, equivalent methods and solutions made on the essence and scope of the present invention. In order to enable the public to have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention. However, those skilled in the art can also fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion to the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0049] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A stretching detection device for rubber products, comprising a base, two groups of columns symmetrically installed 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, A sliding seat is sleeved in the upright column, and a rotating rod and a threaded rod are movably connected to the upright column through bearings. A servo motor for driving the rotating rod and the threaded rod to rotate is fixedly connected to the top end of the upright column. Symmetrically distributed threaded seats are sleeved in the sliding seat. Electromagnets are symmetrically installed on the outer part of the threaded seats, and threaded grooves adapted to the shape of the threaded rod are formed in the threaded seats. A separating component is used to release the threaded connection between the threaded seat and the threaded rod, and the separating component is connected to the threaded seat. A locking component is used for locking and strengthening when the threaded seats adsorb each other, and the locking component is connected to the sliding seat. A positioning component is used for buffering and positioning when the sliding seat drives the movable plate to reset, and the positioning component is connected to the upright column.

2. The tensile testing device for rubber products according to claim 1, wherein A cross beam is fixedly connected between the tops of the upright columns, and a vertical rod is fixedly connected between the cross beam and the base. A thickness detector that can move up and down is sleeved on the outer part of the vertical rod.

3. The tensile testing device for rubber products according to claim 1, characterized in that, A through opening for accommodating the threaded seat is formed in the sliding seat. A positioning head is fixedly connected to the outer part of the threaded seat. A telescopic opening adapted to the size of the positioning head is formed in the sliding seat, and accommodating cavities symmetrically distributed on both sides of the telescopic opening are formed in the inner side wall of the sliding seat.

4. The tensile testing device for rubber products according to claim 1, wherein A slideway adapted to the shape of the sliding seat is formed in the upright column. A guiding groove is formed in the inner side wall of the sliding seat. Guiding blocks are symmetrically installed on the outer side of the threaded seat, and the guiding blocks are sleeved in the guiding grooves.

5. The tensile testing device for rubber products according to claim 1, wherein, The driving shaft of the servo motor extends into the interior of the upright 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 value of the cross section of the rotating rod is greater than the diameter value of the cross section of the threaded rod.

6. The tensile testing device for rubber products according to claim 1, characterized in that, The separating component includes support pieces fixedly connected between the inner side wall of the threaded seat and the sliding seat. The support pieces are symmetrically distributed on both sides of the positioning head. The support pieces are in an S shape, and a second deformation area is formed at the bending part of the support pieces.

7. The tensile testing device for rubber products according to claim 1, characterized in that, The locking component includes fixing plates symmetrically distributed at the top and bottom of the sliding seat. A first elastic piece is fixedly connected to the bottom end of the fixing plate. Uniformly distributed locking columns are fixedly connected to the bottom of the first elastic piece. Locking grooves adapted to the shape of the locking columns are formed in the outer part of the threaded seat.

8. The tensile testing device for rubber products according to claim 7, characterized in that, A through opening adapted to the shape of the sliding seat is formed in the middle of the locking frame, and locking pieces are fixedly connected at the corners of the locking frame. The height value of the locking piece is adapted to the length value of the locking column. A chamfer is arranged at the bottom end of the locking column, and an arc surface is formed at the top end of the locking groove.

9. The tensile testing device for rubber products according to claim 1, wherein, The positioning component includes an avoidance area fixedly connected to the outer side of the upright column. An avoidance groove is formed in the interior of the upright column at the avoidance area. A positioning piece corresponding to the position of the junction of the rotating rod and the threaded rod is fixedly connected in the avoidance groove.

10. The tensile testing device for rubber products according to claim 9, characterized in that, One end of the positioning piece is fixedly connected to the inner side wall of the avoidance groove through a fixed end head, and an open end head is arranged at the other end of the positioning piece. A positioning area adapted to the external shape of the positioning head is arranged in the middle of the positioning piece, and the connection between the positioning area and the fixed end head is C-shaped and provided with a first deformation area.

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