Device for detecting tensile capacity of automobile battery pack rubber blocking strip

Abstract

The invention relates to the technical field of stretching detection, in particular to an automobile battery pack rubber blocking strip stretching resistance detection device which comprises a detection frame, a fixing plate is fixedly connected to the inner side of the detection frame, a pair of upper round blocks and a pair of lower round blocks are fixedly connected to the upper end and the lower end of the front side of the fixing plate respectively, and two pairs of inclined grooves are symmetrically formed in the front side of the fixing plate in a penetrating mode. Through the arrangement of the detection mechanism, the upper round block, the lower round block, the shearing mechanism and other structures, the battery pack rubber blocking strip only needs to be wound between the upper round block and the lower round block in a spiral winding mode, the design of on-line cutting is adopted, an original rubber blocking strip roll does not need to be pre-cut and is directly wound on the detection machine according to a specified path, and the detection efficiency is greatly improved. Then the upper clamping mechanism and the lower clamping mechanism are used for clamping multiple sections of positions of the rubber blocking strips, then the shearing mechanism is used for instantly cutting off the rubber blocking strips in the winding middle section, and then the detection mechanism synchronously drives the multiple rubber blocking strips to stretch towards the middle, so that the tensile test of the six sections of rubber blocking strips can be completed, and a large amount of repeated clamping time is saved.

Description

Technical Field

[0001] This invention relates to the field of tensile testing technology, and in particular to a device for testing the tensile strength of rubber strips used in automotive battery packs. Background Technology

[0002] With the increasing demands for battery pack sealing, weather resistance, and vibration resistance in new energy vehicles, traditional rubber materials are no longer sufficient to meet the long-term use requirements under extreme operating conditions. Therefore, high-performance new materials such as EPDM rubber, fluororubber (FKM), silicone rubber (VMQ), and foamed silicone are gradually being introduced into rubber baffles to improve their resistance to ozone, ultraviolet radiation, high and low temperatures (-60℃ to +200℃), and elastic recovery. However, these new materials have significant differences in molecular structure and cross-linking density, leading to significant fluctuations in their tensile properties (such as breaking strength, elongation, and elastic modulus). Direct installation in vehicles without verification may result in sealing failures. Therefore, it is essential to verify the tensile strength of these new material rubber baffles through specialized testing. The tensile testing device pneumatically clamps both ends of the rubber strip, applies tension at a constant speed by a servo motor, records the force displacement curve in real time, automatically captures the maximum tension and elongation until the sample breaks, and the software compares it with the standard to determine whether it is qualified and generate a report. The whole process can be operated with one click and can be sampled online to ensure the consistency of the tensile performance of the rubber strip, improve the sealing reliability of the battery pack and the safety of the whole vehicle.

[0003] The tensile strength of the rubber strips used to protect automotive battery packs needs to be tested online. To ensure the accuracy of the test results, multiple tests are required for each batch of rubber strips, and the average value is taken. However, with existing equipment, the strips need to be cut into dumbbell or straight strips according to regulations, then clamped, stretched, and recorded one by one. Afterwards, defective samples are manually removed and re-loaded. In large-scale testing, frequent clamping is required, which is time-consuming and labor-intensive. Although there are multi-cavity synchronous testing machines, they still cannot do without the process of "cutting - clamping one by one - manual removal of defective samples". The operation is cumbersome and labor-intensive, which cannot meet the online requirements of the production line with a fast cycle time.

[0004] Therefore, a device for testing the tensile strength of automotive battery pack retaining strips is proposed to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the prior art by providing a device for testing the tensile strength of automotive battery pack retaining strips.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a device for testing the tensile strength of a car battery pack retaining strip, comprising a testing frame, a fixing plate fixedly connected to the inner side of the testing frame, a pair of upper circular blocks and a pair of lower circular blocks fixedly connected to the upper and lower ends of the front side of the fixing plate, two pairs of oblique grooves symmetrically formed through the front side of the fixing plate, a limiting mechanism for pre-fixing the retaining strip on the upper circular blocks, and a pair of straight grooves formed at the front end of the fixing plate relative to the lower position between the two lower circular blocks. U-shaped frames are provided on both sides, and the U-shaped frame located on the front side of the inclined groove has the same inclination direction as the corresponding inclined groove. The inner side of the U-shaped frame is provided with an upper clamping mechanism for clamping the rubber strip. The fixed plate is provided with a lower clamping mechanism for clamping the rubber strip on the outer wall of the upper and lower circular blocks. The rear side of each U-shaped frame is fixedly connected with a round rod for inserting into the inclined groove. The front side of the fixed plate is provided with a connecting frame, which is provided with a shearing mechanism for cutting the rubber strip and a detection mechanism for pressing the round rod to move and detect the stretching of the rubber strip.

[0007] In the above technical solution, the U-shaped frames are slidably connected to the front side of the fixed plate in the direction of the straight groove and the inclined groove. The two pairs of inclined grooves are combined to form an X shape. An upper thickening ring is fixedly connected to the outer wall of one of the upper circular blocks, and a lower thickening ring is fixedly connected to the outer wall of one of the lower circular blocks away from the upper thickening ring. During testing, the sealing strip is fixed by the limiting mechanism on one of the upper circular blocks, and then passes around the outer wall of one of the lower circular blocks along the inclined direction of the inclined groove, then passes horizontally around the outer wall of the other lower circular block, and finally continues to be fixed in the limiting mechanism on the other upper circular block along the inclined direction of the other set of inclined grooves.

[0008] In the above technical solution, the limiting mechanism further includes a limiting block. The front end of each upper circular block is provided with a vertical groove, and the inner side of each vertical groove is provided with a recessed groove. The limiting block is slidably connected to the inner side of the groove, and a limiting spring is fixedly connected between the inner side of the groove and the side wall of the limiting block.

[0009] In the above technical solution, the lower clamping mechanism further includes an upper electric telescopic cylinder and a lower electric telescopic cylinder, each provided in pairs. A top plate is fixedly connected to the front side of the fixed plate relative to the position above the upper circular block. The upper electric telescopic cylinders are all fixedly connected to the top of the top plate. The output end of the upper electric telescopic cylinder passes through the bottom end of the top plate and is fixedly connected to an upper clamping block. An inclined bracket is fixedly connected to the front end of the fixed plate at the lower side away from the lower circular block. The lower electric telescopic cylinders are all fixedly connected to the inclined surface of the inclined bracket. The output end of the lower electric telescopic cylinder passes through the side wall of the inclined bracket and is fixedly connected to a lower clamping block. When clamping and fixing, the lower electric telescopic cylinder drives the lower clamping block to clamp the rubber strip at the lower side away from the lower circular block at the lower side.

[0010] In the above technical solution, the upper clamping mechanism further includes clamping plates, and six clamping plates are provided. The six clamping plates are all laterally slidably connected to the inner side of the corresponding U-shaped frame. A telescopic rod is fixedly connected to the side wall of each clamping plate. A moving groove is opened on the side wall of each telescopic rod. A positioning block is laterally slidably connected to the inner side of the moving groove. A release groove is opened through the side wall of the U-shaped frame relative to the telescopic rod. An L-shaped positioning plate is longitudinally slidably connected to the inner side of the release groove. The positioning block is inclined on the side near the positioning plate. Three right-angled grooves with inclined surfaces are equidistantly opened on the side of the positioning plate near the positioning block. The top of each telescopic rod is inclined on the side away from the clamping plate. A pressing block is fixedly connected to the rear side of the connecting frame relative to the front position of the telescopic rod. A rear electric telescopic cylinder is fixedly connected to the rear side of the fixed plate. The output end of the rear electric telescopic cylinder passes through the front side of the fixed plate and is fixedly connected to the rear side of the connecting frame.

[0011] In the above technical solution, further, a number of upper springs are fixedly connected between the inner side of the moving groove and the side wall of the positioning block, a pair of lower springs are fixedly connected between the top of the release groove and the top of the positioning plate, and a pressing slope for pressing the inclined surface of the telescopic rod is opened on the rear side of the pressing block. A release rod is fixedly connected to the side wall of the positioning plate. A release plate is fixedly connected to the front side of the fixed plate relative to the position next to the release rod, and the release plate is inclined on the side near the release rod. A pair of reset springs are fixedly connected between the side wall of the clamping plate and the inner side of the U-shaped frame.

[0012] In the above technical solution, the detection mechanism further includes a bidirectional electric telescopic cylinder, which is fixedly connected to the rear side of the fixed plate. A pair of sliding frames are laterally slidably connected to the rear side of the fixed plate, and the rear ends of the round rods are all inserted into the inner side of the sliding frames. An L-shaped rod is fixedly connected to the side of the sliding frames that is away from each other. The output end of the bidirectional electric telescopic cylinder is fixedly connected to the side wall of the L-shaped rod.

[0013] In the above technical solution, the shearing mechanism further includes a shearing plate, and a pair of shearing plates are provided. One shearing plate is located at the intersection of the inclined grooves, and the other shearing plate is located between the straight grooves. A front electric telescopic cylinder is fixedly connected to the front side of the connecting frame relative to the front position of the shearing plate. The output end of the front electric telescopic cylinder passes through the rear side of the connecting frame and is fixedly connected to the side wall of the shearing plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention, through the setting of a detection mechanism, an upper circular block, a lower circular block, and a shearing mechanism, only requires the battery pack retaining strip to be wound in a spiral manner between the upper and lower circular blocks. With the addition of an online cutting design, the original roll of retaining strip does not need to be pre-cut. It is directly wound onto the detection machine along a specified path. Then, the upper and lower clamping mechanisms hold multiple segments of the retaining strip. Subsequently, the shearing mechanism cuts instantly in the middle of the winding. Then, the detection mechanism simultaneously drives multiple retaining strips to stretch towards the middle, thus completing the tensile test of six segments of retaining strip, saving a lot of repeated clamping time.

[0015] 2. The present invention, through the setting of the upper clamping mechanism, can not only automatically clamp multiple parts of the rubber-blocking strip, making it convenient to perform tensile testing directly after cutting, but also automatically release the clamping and fixing of multiple rubber-blocking strips after the tensile testing is completed, without the need for manual operation, further improving the convenience of the device. Attached Figure Description

[0016] Figure 1 This is a frontal perspective view of the detection device of the present invention; Figure 2 Appendix of the present invention Figure 1 A magnified view of the structure at point A in the middle; Figure 3 This is a rear-view three-dimensional structural diagram of the detection device of the present invention; Figure 4 This is a schematic diagram of the overall appearance structure of the fixing plate and connecting frame of the present invention; Figure 5 This is a schematic diagram of the overall appearance structure of the connecting frame of the present invention; Figure 6 This is a three-dimensional structural diagram of the front of the fixing plate of the present invention; Figure 7 This is a schematic diagram of the overall appearance structure of the upper circular block, lower circular block, and bidirectional electric telescopic cylinder of the present invention. Figure 8 This is a schematic diagram of the three-dimensional structure of a partially cut-out front view of the upper circular block of the present invention; Figure 9 This is a schematic diagram of the overall appearance structure of the U-shaped frame of the present invention; Figure 10This is a schematic diagram of the three-dimensional structure of the U-shaped frame, clamping plate and positioning plate of the present invention.

[0017] In the diagram: 1. Inspection frame; 2. Fixing plate; 3. Upper round block; 4. Lower round block; 5. Inclined groove; 6. U-shaped frame; 7. Round rod; 8. Straight groove; 9. Connecting frame; 10. Upper thickening ring; 11. Lower thickening ring; 12. Limiting block; 13. Limiting spring; 14. Upper electric telescopic cylinder; 15. Lower electric telescopic cylinder; 16. Top plate; 17. Upper clamping block; 18. Inclined bracket; 19. Lower clamping block; 20. Clamping 21. Plate; 22. Telescopic rod; 23. Positioning block; 24. Positioning plate; 25. Right angle groove; 26. Extrusion block; 27. Rear electric telescopic cylinder; 28. Extrusion inclined surface; 29. ​​Release rod; 30. Upper spring; 31. Lower spring; 32. Release plate; 33. Bidirectional electric telescopic cylinder; 34. Sliding frame; 35. L-shaped rod; 36. Shearing plate; 37. Front electric telescopic cylinder; 38. Vertical groove; 39. Return spring. Detailed Implementation

[0018] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0020] In practical use, it was found that the tensile strength of the rubber strips of automotive battery packs needs to be checked online. In order to ensure the accuracy of the test results, multiple tests are required for each batch of battery pack rubber strips, and the average value is taken. However, when testing with existing equipment, it is necessary to first cut the strips into dumbbell or straight strips according to regulations, then clamp, stretch, and record them one by one. Afterwards, the defective samples are manually removed and re-loaded. In large-scale testing, frequent clamping is required, which is time-consuming and labor-intensive. Although there are multi-cavity synchronous testing machines, they still cannot do without the process of "cutting-clamping one by one-manual removal of defective samples". The operation is cumbersome and labor-intensive, which cannot meet the online requirements of the production line with a fast cycle time. To solve the above problems, the following structure was invented.

[0021] like Figures 1-10The device shown is for testing the tensile strength of a car battery pack retaining strip. It includes a testing frame 1, with a fixing plate 2 fixedly connected to the inner side of the frame 1. A pair of upper circular blocks 3 and a pair of lower circular blocks 4 are fixedly connected to the upper and lower ends of the front side of the fixing plate 2, respectively. Two pairs of symmetrical inclined grooves 5 are symmetrically formed through the front side of the fixing plate 2. A limiting mechanism for pre-fixing the retaining strip is provided on the upper circular blocks 3. A pair of straight grooves 8 are formed at the lower position between the two lower circular blocks 4 at the front end of the fixing plate 2. A U-shaped frame 6 is provided at the front end of the fixing plate 2 relative to the front positions of the inclined grooves 5 and the straight grooves 8. The U-shaped frame 6 located in front of the inclined groove 5 has the same inclination direction as the corresponding inclined groove 5. A mechanism for pre-fixing the retaining strip is provided inside the U-shaped frame 6. Regarding the upper clamping mechanism for holding the rubber strip, it should be noted that the upper clamping mechanism inside the U-shaped frame 6 is equipped with a tension detection unit, which can automatically monitor various data during the stretching process of the rubber strip and feed them back to the system in real time. This is a mature technology in the prior art and will not be described in detail here. The fixed plate 2 is provided with a lower clamping mechanism for clamping the rubber strip on the outer wall of the upper round block 3 and the lower round block 4. The rear side of the U-shaped frame 6 is fixedly connected with a round rod 7 for inserting into the inclined groove 5. The front side of the fixed plate 2 is provided with a connecting frame 9, which is provided with a shearing mechanism for cutting the rubber strip and a detection mechanism for pressing the round rod 7 to move and detect the stretching of the rubber strip. The U-shaped frames 6 are all slidably connected to the front side of the fixed plate 2 in the direction of the straight groove 8 and the inclined groove 5. The two pairs of inclined grooves 5 are combined together to form an X shape. An upper thickening ring 10 is fixedly connected to the outer wall of one of the upper round blocks 3, and a lower thickening ring 11 is fixedly connected to the outer wall of one of the lower round blocks 4 away from the upper thickening ring 10. During the test, the rubber strip is fixed by the limiting mechanism on one of the upper round blocks 3, and then passes around the outer wall of one of the lower round blocks 4 along the inclined direction of the inclined groove 5, and then passes around the outer wall of the other lower round block 4 horizontally, and finally continues to be fixed in the limiting mechanism on the other upper round block 3 along the inclined direction of the other set of inclined grooves 5. The limiting mechanism includes a limiting block 12. The front end of the upper round block 3 is provided with a vertical groove 37. The inner side of the vertical groove 37 is provided with a recessed groove. The limiting block 12 is slidably connected to the inner side of the groove. A limiting spring 13 is fixedly connected between the inner side of the groove and the side wall of the limiting block 12. The lower clamping mechanism includes an upper electric telescopic cylinder 14 and a lower electric telescopic cylinder 15. Both the upper electric telescopic cylinder 14 and the lower electric telescopic cylinder 15 are provided in pairs. A top plate 16 is fixedly connected to the front side of the fixed plate 2 relative to the position above the upper circular block 3. The upper electric telescopic cylinder 14 is fixedly connected to the top of the top plate 16. The output end of the upper electric telescopic cylinder 14 passes through the bottom end of the top plate 16 and is fixedly connected to the upper clamping block 17. An inclined bracket 18 is fixedly connected to the front end of the fixed plate 2 at the lower side away from the lower circular block 4. The lower electric telescopic cylinder 15 is fixedly connected to the inclined surface of the inclined bracket 18. The output end of the lower electric telescopic cylinder 15 passes through the side wall of the inclined bracket 18 and is fixedly connected to the lower clamping block 19. When clamping and fixing, the lower electric telescopic cylinder 15 drives the lower clamping block 19 to clamp the rubber strip at the lower side away from the lower circular block 4. The testing mechanism includes a bidirectional electric telescopic cylinder 32, which is fixedly connected to the rear side of the fixed plate 2. A pair of sliding frames 33 are slidably connected to the rear side of the fixed plate 2, and the rear ends of the round rods 7 are inserted into the inner side of the sliding frames 33. L-shaped rods 34 are fixedly connected to the side of the sliding frames 33 that are far away from each other. The output ends of the bidirectional electric telescopic cylinder 32 are fixedly connected to the side wall of the L-shaped rods 34. The shearing mechanism includes a shearing plate 35. A pair of shearing plates 35 are provided. One shearing plate 35 is located at the intersection of the inclined groove 5, and the other shearing plate 35 is located between the straight grooves 8. A front electric telescopic cylinder 36 is fixedly connected to the front side of the connecting frame 9 relative to the front position of the shearing plate 35. The output end of the front electric telescopic cylinder 36 passes through the rear side of the connecting frame 9 and is fixedly connected to the side wall of the shearing plate 35. When performing a tensile test on the rubber strip of the car battery pack, first push the limiting block 12 into the inner side of the groove and compress the limiting spring 13. Then insert one end of the original roll of the rubber strip into the vertical groove 37 of one of the upper round blocks 3. The limiting block 12 can then be released. Subsequently, under the elastic force of the limiting spring 13, it is pushed to reset, and then the limiting block 12 is pushed to clamp the rubber strip in the vertical groove 37. Then the rubber strip is wrapped around the outer wall of the upper round block 3 away from the U-shaped frame 6. Then the rubber strip passes through the U-shaped frame 6 in front of one of the inclined grooves 5 and wraps around the outer wall of the lower round block 4 diagonally below. (It should be noted that the rubber strip wrapped around the upper round block 3 does not wrap around the outer wall of the lower round block 4 directly below, but wraps around the outer wall of the lower round block 4 directly below the other upper round block 3). Then, following the direction of the straight groove 8, continue winding the rubber-blocking strip so that it passes over the outer wall of another lower circular block 4 (during this process, since the outer wall of the lower circular block 4 is fixed with a lower thickening ring 11, when the rubber-blocking strip passes over here, it will move forward to avoid being obstructed by the previously passed rubber-blocking strip, causing displacement and affecting the stability of the subsequent clamping process). Then, when the rubber-blocking strip passes over the lower circular block 4, it passes over the outer wall of another upper circular block 3 along the direction of another set of inclined grooves 5. Then, push the limiting block 12 on the other upper circular block 3 to pre-clamp the other end of the rubber-blocking strip in the other upper circular block 3. Then, the upper electric telescopic cylinder 14 can be controlled to start and drive the upper clamping block 1. 7. Move down so that the upper clamping block 17 clamps the rubber-blocking strip on the outer wall of the upper circular block 3. At the same time, control the lower electric telescopic cylinder 15 to start and drive the lower clamping block 19 to move. Thus, the rubber-blocking strip is clamped on the outer wall of the lower circular block 4 by the lower clamping block 19. (Since the corner point of the rubber-blocking strip is located at the diagonal lower position of the lower circular block 4 away from the side, the lower clamping block 19 clamps the rubber-blocking strip tightly on the outer wall of the lower circular block 4. When the two sections of the rubber-blocking strip on the lower circular block 4 are stretched in the future, the rubber-blocking strip is separated into two sections by the lower clamping block 19 because the rubber-blocking strip is tightly clamped by the lower clamping block 19. The two sections will not be affected by the other one, so as not to affect the tensile test results.) Then, control the upper clamping mechanism to clamp the rubber strip inside the U-shaped frame 6. Then, control the front electric telescopic cylinder 36 to start and drive the shearing plate 35 to move to the rear side to cut the middle position of the rubber strip. Then, under the clamping action of the lower clamping block 19, the cut rubber strip will be divided into six segments to meet the multiple inspection requirements of the rubber strip. Then, control the bidirectional electric telescopic cylinder 32 to start and pull the L-shaped rod 34 and the two sliding frames 33 to slide towards the middle. During this process, the round rod 7 inserted in the sliding frame 33 will be squeezed to move towards the middle. Since the round rod 7 is restricted by the inclined groove 5, it can only slide within the inclined groove 5. Therefore, when the sliding frame 33 pushes the round rod 7 to move towards the middle, it will push the round rod 7 to slide within the inclined groove 5. At the same time, it will drive the U-shaped frame 6 to move towards the middle along the direction of the inclined groove 5. Meanwhile, the round rod 7 slides within the sliding frame 33, thereby driving the cut rubber strip to move towards the middle. At the same time, the sliding frame 33 will push the round rod 7 and the U-shaped frame 6 on the straight groove 8 to move towards the middle, thereby realizing the simultaneous testing of the six sections of the sealing strip. The tensile data is monitored in real time by the monitoring unit on the U-shaped frame 6, which can realize the rapid detection of the sealing strip. Finally, after the test is completed, the bidirectional electric telescopic cylinder 32 is controlled to reset.

[0022] In summary, with the above structural design, the battery pack retaining strip is simply wound spirally between the upper circular block 3 and the lower circular block 4. With the addition of an online cutting design, the original roll of retaining strip does not need to be pre-cut. It is directly wound onto the testing machine along a specified path. The upper and lower clamping mechanisms hold the multiple segments of the retaining strip. Then, the cutting mechanism cuts the strip instantly in the middle of the winding. The testing mechanism then simultaneously drives multiple retaining strips to stretch towards the center, thus completing the tensile test of the six retaining strips and saving a lot of repeated clamping time.

[0023] Based on the above embodiments, it was found during use that although the above structure can complete the simultaneous testing of multiple sections of the rubber strip, after the test is completed, the tester still needs to remove the clamping and fixing of the rubber strip, which is quite troublesome. In order to solve the above problems, the above structure has been further improved.

[0024] The upper clamping mechanism includes clamping plates 20, which are provided with six clamping plates 20. All six clamping plates 20 are laterally slidably connected to the inner side of the corresponding U-shaped frame 6. Telescopic rods 21 are fixedly connected to the side walls of the clamping plates 20. The side walls of the telescopic rods 21 are provided with moving grooves. Positioning blocks 22 are laterally slidably connected to the inner side of the moving grooves. Release grooves are provided through the side walls of the U-shaped frame 6 relative to the telescopic rods 21. L-shaped positioning plates 23 are longitudinally slidably connected to the inner side of the release grooves. The positioning blocks 22 are inclined on the side near the positioning plates 23. The positioning plates 23 are provided with three right-angled grooves 24 with inclined surfaces at equal intervals on the side near the positioning blocks 22. The top of the telescopic rods 21 on the side away from the clamping plates 20 are all inclined. Extrusion blocks 25 are fixedly connected to the rear side of the connecting frame 9 relative to the front of the telescopic rods 21. A rear electric telescopic cylinder 26 is fixedly connected to the rear side of the fixing plate 2. The output end of the rear electric telescopic cylinder 26 passes through the front side of the fixing plate 2 and is fixedly connected to the rear side of the connecting frame 9. Several upper springs 29 are fixedly connected between the inner side of the moving groove and the side wall of the positioning block 22. A pair of lower springs 30 are fixedly connected between the top of the release groove and the top of the positioning plate 23. The rear side of the pressing block 25 is provided with a pressing slope 27 for pressing the inclined surface of the telescopic rod 21. The side wall of the positioning plate 23 is fixedly connected with a release rod 28. The front side of the fixed plate 2 is fixedly connected with a release plate 31 relative to the position next to the release rod 28. The release plate 31 is inclined on the side near the release rod 28. A pair of reset springs 38 are fixedly connected between the side wall of the clamping plate 20 and the inner side of the U-shaped frame 6. After the sealing strip is wrapped, when the upper clamping mechanism is started, the connecting frame 9 is pulled backward by the control of the rear electric telescopic cylinder 26, and the shearing plate 35 is moved backward together. At the same time, multiple extrusion blocks 25 are moved backward. Since the telescopic rod 21 can only slide laterally on the U-shaped frame 6, as the extrusion blocks 25 gradually move backward, the extrusion slope 27 on the extrusion block 25 will gradually push the slope of the telescopic rod 21, so that the telescopic rod 21 slides to one side of the U-shaped frame 6. At the same time, the clamping plate 20 is moved to clamp the sealing strip between the clamping plate 20 and the inner side of the U-shaped frame 6. During this process, the movement of the telescopic rod 21 will drive the positioning block 22 to move. Then, when the positioning block 22 moves to the side of the positioning plate 23, since the positioning block 22 can only slide laterally in the moving groove, the side wall of the positioning plate 23 will squeeze the slope of the positioning block 22, so that the positioning block 22 slides into the moving groove and compresses the upper spring 29. Subsequently, when the positioning block 22 moves to the right angle groove 24 on the positioning plate 23, the pressure on the positioning block 22 will be released. Then, under the elastic force of the upper spring 29, the positioning block 22 will be pushed to reset. As the telescopic rod 21 continues to move, the reset spring 38 will be gradually compressed. At the same time, the inclined surface of the right angle groove 24 will press the inclined surface of the positioning block 22, causing the positioning block 22 to slide into the moving groove again. Then, the telescopic rod 21 will drive the positioning block 22 to move to another right angle groove 24. The above operation is repeated to reset until the clamping plate 20 tightly clamps the rubber strip inside the U-shaped frame 6. At this time, the positioning block 22 is inserted into the corresponding right angle groove 24. Since the plane of the positioning block 22 abuts against the plane of the right angle groove 24, it will restrict the reset of the telescopic rod 21, thus ensuring the tensile test of the rubber strip after subsequent shearing. Before the tensile test, the electric telescopic cylinder 26 is reset, causing the compression block 25 to move away. Finally, after all the rubber strips break under tension, the bidirectional electric telescopic cylinder 32 can be controlled to drive the sliding frame 33 to continue moving towards the center, and drive the U-shaped frame 6 to move towards the center. At this time, the release rod 28 will move towards the release plate 31. Subsequently, when the release rod 28 moves to the side of the inclined surface of the release plate 31, since the release rod 28 and the positioning plate 23 can only move up and down within the release groove, as the U-shaped frame 6 continues to move, the inclined surface of the release plate 31 will squeeze the release rod 28 upward. Simultaneously, the positioning plate 23 moves upward within the release groove and compresses the lower spring 30, thereby pulling the right-angle groove 24 out of the positioning block 22. Subsequently, the positioning plate 23 moves the right-angle groove 24 away from the positioning block 22, releasing the limitation on the positioning block 22, and thus releasing the limitation on the telescopic rod 21. At this time, the clamping plate 20 will be pulled back to its original position by the elastic force of the return spring 38, and the telescopic rod 21 and the positioning block 22 will also be reset, thereby automatically releasing the clamping of the baffle strip. Finally, the upper electric telescopic cylinder 14 and the lower electric telescopic cylinder 15 are controlled to reset, releasing all the clamping and fixing of the baffle strip.

[0025] In summary, the above-described structure not only automatically clamps multiple parts of the rubber-blocking strip, facilitating direct tensile testing after cutting, but also automatically releases the clamping and fixing of multiple rubber-blocking strips after the tensile test is completed, eliminating the need for manual operation and further improving the convenience of the device.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of the present invention.

[0027] Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed.

Claims

1. A device for testing the tensile strength of a car battery pack retaining strip, comprising a testing frame (1), characterized in that: The inner side of the testing frame (1) is fixedly connected to a fixing plate (2). The upper and lower ends of the front side of the fixing plate (2) are respectively fixedly connected to a pair of upper round blocks (3) and a pair of lower round blocks (4). The front side of the fixing plate (2) is symmetrically provided with two pairs of inclined grooves (5). The upper round blocks (3) are provided with a limiting mechanism for pre-fixing the rubber strip. The front end of the fixing plate (2) is provided with a pair of straight grooves (8) at the lower position between the two lower round blocks (4). The front end of the fixing plate (2) is provided with U-shaped frames (6) at the front side of both the inclined grooves (5) and the straight grooves (8), and is located in front of the inclined grooves (5). The U-shaped frame (6) and the corresponding inclined groove (5) are inclined in the same direction. The inner side of the U-shaped frame (6) is provided with an upper clamping mechanism for clamping the rubber strip. The fixed plate (2) is provided with a lower clamping mechanism for clamping the rubber strip on the outer wall of the upper round block (3) and the lower round block (4). The rear side of the U-shaped frame (6) is fixedly connected with a round rod (7) for inserting into the inclined groove (5). The front side of the fixed plate (2) is provided with a connecting frame (9). The connecting frame (9) is provided with a shearing mechanism for cutting the rubber strip. It is also provided with a detection mechanism for pressing the round rod (7) to move and perform a stretching detection of the rubber strip.

2. The device for testing the tensile strength of automotive battery pack retaining strips according to claim 1, characterized in that: The U-shaped frame (6) is slidably connected to the front side of the fixed plate (2) in the direction of the straight groove (8) and the inclined groove (5). The two pairs of inclined grooves (5) are combined together in an X shape. An upper thickening ring (10) is fixedly connected to the outer wall of one of the upper round blocks (3). A lower thickening ring (11) is fixedly connected to the outer wall of one of the lower round blocks (4) away from the upper thickening ring (10). During the test, the rubber strip is fixed by the limiting mechanism on one of the upper round blocks (3). Then, along the inclined direction of the inclined groove (5), it passes around the outer wall of one of the lower round blocks (4), then passes horizontally around the outer wall of the other lower round block (4), and finally continues to be fixed in the limiting mechanism on the other upper round block (3) along the inclined direction of the other set of inclined grooves (5).

3. The device for testing the tensile strength of automotive battery pack retaining strips according to claim 1, characterized in that: The limiting mechanism includes a limiting block (12). The front end of the upper round block (3) is provided with a vertical groove (37). The inner side of the vertical groove (37) is provided with a recessed groove. The limiting block (12) is slidably connected to the inner side of the groove. A limiting spring (13) is fixedly connected between the inner side of the groove and the side wall of the limiting block (12).

4. The device for testing the tensile strength of automotive battery pack retaining strips according to claim 1, characterized in that: The lower clamping mechanism includes an upper electric telescopic cylinder (14) and a lower electric telescopic cylinder (15), each having a pair. A top plate (16) is fixedly connected to the front side of the fixed plate (2) relative to the upper circular block (3). The upper electric telescopic cylinder (14) is fixedly connected to the top of the top plate (16). The output end of the upper electric telescopic cylinder (14) passes through the bottom end of the top plate (16) and is fixedly connected to an upper clamping block (17). The front end of the fixed plate (2) is fixedly connected to the inclined bracket (18) on the side away from the lower round block (4). The lower electric telescopic cylinder (15) is fixedly connected to the inclined surface of the inclined bracket (18). The output end of the lower electric telescopic cylinder (15) passes through the side wall of the inclined bracket (18) and is fixedly connected to the lower clamping block (19). When clamping and fixing, the lower electric telescopic cylinder (15) drives the lower clamping block (19) to clamp the rubber strip on the side away from the lower round block (4) at the position of the inclined lower side.

5. The device for testing the tensile strength of automotive battery pack retaining strips according to claim 1, characterized in that: The upper clamping mechanism includes clamping plates (20), of which six clamping plates (20) are provided. All six clamping plates (20) are laterally slidably connected to the inner side of the corresponding U-shaped frame (6). Each clamping plate (20) has a telescopic rod (21) fixedly connected to its sidewall. The sidewall of the telescopic rod (21) has a moving groove. A positioning block (22) is laterally slidably connected to the inner side of the moving groove. A release groove is provided through the sidewall of the U-shaped frame (6) relative to the telescopic rod (21). An L-shaped positioning plate (23) is longitudinally slidably connected to the inner side of the release groove. The positioning block ( 22) The positioning plate (23) is inclined on one side. The positioning plate (23) has three right-angled grooves (24) with inclined surfaces at equal intervals on the side near the positioning block (22). The top of the telescopic rod (21) is inclined on the side away from the clamping plate (20). The rear side of the connecting frame (9) is fixedly connected to the pressing block (25) at the position in front of the telescopic rod (21). The rear side of the fixing plate (2) is fixedly connected to the rear electric telescopic cylinder (26). The output end of the rear electric telescopic cylinder (26) passes through the front side of the fixing plate (2) and is fixedly connected to the rear side of the connecting frame (9).

6. The device for testing the tensile strength of automotive battery pack retaining strips according to claim 5, characterized in that: Several upper springs (29) are fixedly connected between the inner side of the moving groove and the side wall of the positioning block (22). A pair of lower springs (30) are fixedly connected between the top of the release groove and the top of the positioning plate (23). The rear side of the pressing block (25) is provided with a pressing inclined surface (27) for pressing the inclined surface of the telescopic rod (21). The side wall of the positioning plate (23) is fixedly connected with a release rod (28). The front side of the fixing plate (2) is fixedly connected with a release plate (31) relative to the position next to the release rod (28). The release plate (31) is inclined on the side near the release rod (28). A pair of reset springs (38) are fixedly connected between the side wall of the clamping plate (20) and the inner side of the U-shaped frame (6).

7. The device for testing the tensile strength of automotive battery pack retaining strips according to claim 1, characterized in that: The detection mechanism includes a bidirectional electric telescopic cylinder (32), which is fixedly connected to the rear side of the fixed plate (2). A pair of sliding frames (33) are slidably connected to the rear side of the fixed plate (2), and the rear ends of the round rod (7) are inserted into the inner side of the sliding frame (33). An L-shaped rod (34) is fixedly connected to the side of the sliding frame (33) away from each other. The output end of the bidirectional electric telescopic cylinder (32) is fixedly connected to the side wall of the L-shaped rod (34).

8. The device for testing the tensile strength of automotive battery pack retaining strips according to claim 1, characterized in that: The shearing mechanism includes a shearing plate (35), and a pair of shearing plates (35) are provided. One of the shearing plates (35) is located at the intersection of the inclined groove (5), and the other shearing plate (35) is located between the straight grooves (8). A front electric telescopic cylinder (36) is fixedly connected to the front side of the connecting frame (9) relative to the front position of the shearing plate (35). The output end of the front electric telescopic cylinder (36) passes through the rear side of the connecting frame (9) and is fixedly connected to the side wall of the shearing plate (35).

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