Tensile strength testing device for air spring production

Abstract

The invention relates to the technical field of spring detection equipment, and discloses a tensile strength testing device for air spring production, the tensile strength testing device comprises a main body structure, a tensile structure is detachably mounted on the main body structure, and suspension structures are symmetrically arranged on the tensile structure. Detection accuracy, adaptation flexibility and operation safety are considered, high air leakage detection accuracy is achieved, different specification test requirements are met, personnel operation safety can be guaranteed, through a stretching structure, test scene suitability and data detection comprehensiveness are improved, multi-size and multi-type spring tests are adapted, and multi-working-condition mechanical data detection is achieved; through a suspension structure, adaptability and installation convenience of springs of different specifications are enhanced, installation tests of air springs and metal springs are compatible, and the comprehensive practical value of equipment is improved.

Description

Technical Field

[0001] This invention relates to the field of spring testing equipment technology, specifically a tensile strength testing device for air spring production. Background Technology

[0002] Air springs, as a key component that combines support, cushioning, shock absorption, and adjustment functions, are widely used in automotive suspensions, rail transit vehicles, construction machinery, precision instruments and equipment, and other fields. Their tensile strength directly determines the structural stability and safety of the product under dynamic loads and during long-term use. If the tensile strength does not meet the standards, it is easy to experience failures such as breakage, deformation, and air leakage, which will not only affect the normal operation of the equipment but may also cause safety accidents. Therefore, in the production process of air springs, testing their tensile strength and related properties, such as sealing performance and resistance to deformation, is a core link to ensure product quality and application safety. However, the mainstream air spring tensile strength testing devices on the market at present have limited testing functions and cannot take into account multi-dimensional performance evaluation. They can only test the tensile strength mechanical parameters of air springs or single springs, which is not adaptable enough and cannot be compatible with multiple types and specifications of test parts. Moreover, the test often tests the air spring horizontally or vertically at both ends, and cannot achieve multi-angle force testing. Summary of the Invention

[0003] To address the shortcomings of existing technologies, a tensile strength testing device for air spring production is provided. This device solves the problems of single testing and weak adaptability in existing technologies. This invention realizes multi-directional testing functions and is applicable to the characteristics of products with different specifications.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a tensile strength testing device for air spring production, comprising a main structure, on which a tensile structure is detachably mounted, and on which suspension structures are symmetrically arranged; wherein, the main structure is used for sealing and bearing to form a vacuum testing environment, the tensile structure is used to drive the symmetrically arranged suspension structures to move relative to or in opposite directions, and the suspension structures are used to install air springs or single springs to realize tensile and compressive testing of the test piece.

[0005] Preferably, the main structure includes a detection box, a controller, a vacuum pump, a solenoid valve, a pressure detector, and a pair of cameras; the controller is fixedly installed in the middle of the front side wall of the detection box, the vacuum pump is fixedly installed on the upper wall of the detection box near the left end, one end of the solenoid valve is fixedly connected to the upper wall of the detection box and communicates with the detection box, the other end of the solenoid valve is connected to the suction end of the vacuum pump through a pipe, the pressure detector is fixedly installed on the upper wall of the detection box, and the pair of cameras are symmetrically arranged in the middle of the front and rear side walls inside the detection box.

[0006] Preferably, the testing box is a rectangular box without a right side wall, and supports are provided at the four corners of the lower wall of the testing box, and a sealing groove is provided along the middle of the right side wall of the testing box.

[0007] Preferably, the main structure further includes a pair of first slide rails, a pair of connecting arms, a box cover, and a sealing strip; the pair of first slide rails are symmetrically arranged on the upper inner wall of the testing box, one end of each pair of connecting arms is fixedly arranged on the first slide rails, and the other end of the connecting arms can be located on the right side of the testing box, the box cover is fixedly arranged on the other end of the pair of connecting arms, and the box cover is fastened to the right side of the testing box, and the sealing strip is fixedly arranged on the left side wall of the box cover, and the sealing strip is embedded in the sealing groove of the testing box.

[0008] Preferably, the tensile structure includes a mounting base, a mounting frame, a second slide rail, a connecting frame, a third slide rail, and a testing unit; one end of the mounting base is detachably disposed on the middle of the left side wall of the box cover, one end of the mounting frame is fixedly disposed on the other end of the mounting base, and the mounting frame is movably inserted into the testing box; the mounting base is concave, and slide rails are provided on opposite side walls at both ends of the mounting base; a drive port is provided in the middle of the rear side wall of the mounting base; the second slide rail is fixedly disposed on the upper wall of the mounting base; one end of the connecting frame is fixedly disposed on the second slide rail, and the connecting frame is located on the rear side of the mounting frame; one end of the third slide rail is fixedly disposed on the connecting frame; and the testing unit is fixedly disposed on the third slide rail, and the testing unit is movably embedded in the mounting frame.

[0009] Preferably, the test unit includes a slide block, a lifting slide rail, and a gravity detector; one end of the slide block is movably embedded in the mounting frame and is located between slide tracks, the other end of the slide block movably passes through the drive port and is connected to a third slide rail, the slide block moves left and right via the third slide rail, the lifting slide rail is fixedly mounted on one end of the slide block and is located on the front side of the mounting frame, the gravity detector is fixedly mounted on the lifting slide rail and moves up and down via the lifting slide rail.

[0010] Preferably, the suspension structure includes a mounting base, a pair of limiting rods, a pressure base, an adjusting screw, several sleeve rods, and several baffles; the mounting base is L-shaped, with one end of the mounting base mounted on the gravity detector, one end of each of the pair of limiting rods movably penetrating the other end of the mounting base, the pressure base is L-shaped, one end of the pressure base is fixedly mounted on the other end of the pair of limiting rods, and the other end of the pressure base can penetrate the other end of the mounting base, one end of the adjusting screw movably penetrating one end of the pressure base and located between the pair of limiting rods, and the other end of the adjusting screw movably screwed into the other end of the mounting base, one end of each of the several sleeve rods being a threaded rod with the same diameter, and the other ends of the sleeve rods having different diameters, one end of each of the several sleeve rods being detachably screwed into the middle of the other end of the pressure base, and the sleeve rods being located in front of the gravity detector, and the several baffles being detachably screwed into the other end of each sleeve rod, and the diameter of the baffles being larger than that of the sleeve rods.

[0011] Preferably, the suspension structure is fixedly mounted on the front side of one end of the mounting frame and on the gravity detector, and the tension structures are symmetrical to each other.

[0012] Preferably, the sleeves in the suspension structure can be opposite each other on the same horizontal line, or be located in staggered vertical positions.

[0013] Preferably, the test unit can be detached from the mounting bracket via the second and third slide rails.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. High accuracy in leak detection: The main structure forms a sealed cavity through an electrically controlled switch cover, sealing strip, and sealing groove. Combined with a vacuum pump and solenoid valve, a vacuum detection environment is created, which can accurately capture slight leaks in air springs caused by air pressure. Compared with traditional non-vacuum detection, air pressure changes in a vacuum environment are more easily detected by the air pressure detector, effectively avoiding interference from the environment with weak leak signals and significantly improving the sensitivity and accuracy of leak detection. The cover is electrically driven to open and close flexibly. When open, it can fully fit the stroke range of the tension structure. Whether it is a short-sized small air spring or a long-sized steel structure spring, the test can be completed by adjusting the stroke of the tension structure. There is no need to change the detection cavity or adjust the main body of the device due to product specifications, which significantly broadens the size coverage of the tested products.

[0015] 2. The tension structure, in conjunction with the testing unit, flexibly adjusts the spacing between the two symmetrical suspension structures. For air springs of different sizes (such as differences in length and thickness) and metal springs, only the spacing between the suspension structures needs to be adjusted to achieve stable fixation and testing, without the need to replace the tension components, thus reducing equipment adaptation costs. The tension structure can drive the suspension structures to move relative to or in opposite directions to complete the tension and compression tests on air springs and metal springs, while simultaneously acquiring complete mechanical data through a gravity detector. On the other hand, by adjusting the height of the gravity detector using the lifting slide rail in the testing unit, the vertical position of the suspension structure can be changed, enabling air springs to not only undergo horizontal force testing but also tilt and multi-angle force testing, which matches the complex force scenarios of springs in actual applications, making the test data closer to the real usage conditions.

[0016] 3. The suspension structure utilizes a dual design of "sleeve rod and baffle" and "clamp and pressure seat" to accommodate two types of springs: For air springs with shaft holes, a sleeve rod of the corresponding diameter can be selected, and the spring shaft hole is fitted onto the sleeve rod and fixed by the baffle; for curved metal springs, the pressure seat and clamp can be engaged by rotating the adjusting screw to clamp and fix both ends of the spring without the need for additional special clamps, making it highly adaptable; the sleeve rod adopts a detachable screw-on design, and different diameter sleeve rods can be used to accommodate air springs with different shaft hole specifications; the clamping distance between the pressure seat and the clamp can be flexibly adjusted by the adjusting screw to accommodate metal springs of different thicknesses and lengths; the entire installation process requires no complicated tools, is easy to operate, significantly shortens the preparation time when switching between different product specifications, improves testing efficiency, and reduces costs.

[0017] 4. The device can test both air springs and metal springs simultaneously. In terms of product specifications, it covers springs of different sizes and structures through designs such as spacing adjustment, sleeve replacement, and clamp adjustment. In terms of testing needs, it takes into account multiple dimensions such as air leakage detection, mechanical performance testing, and multi-angle working condition testing. One device can replace the functions of multiple traditional dedicated testing devices, reducing enterprise equipment investment and enhancing the overall practical value of the equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the assembly structure of the present invention; Figure 2 This is a schematic diagram of the main structure of the present invention broken down; Figure 3 This is a schematic diagram illustrating the assembly of the suspension structure and tension structure of the present invention; Figure 4 This is a schematic diagram of the disassembled structure of the stretching structure of the present invention; Figure 5 This is a schematic diagram of the test unit structure of the present invention. Figure 6 This is a schematic diagram of the disassembled suspension structure of the present invention; Figure 7 for Figure 3 Enlarged view of point A in the image.

[0019] In the diagram: 1. Main structure; 11. Detection box; 12. Controller; 13. Vacuum pump; 14. Solenoid valve; 15. Air pressure detector; 16. Camera; 17. First slide rail; 18. Connecting arm; 19. Box cover; 10. Sealing strip; 2. Tension structure; 21. Mounting base; 22. Mounting frame; 23. Second slide rail; 24. Connecting frame; 25. Third slide rail; 26. Test unit; 261. Slide seat; 262. Lifting slide rail; 263. Gravity detector; 27. Slide track; 28. Drive port; 3. Suspension structure; 31. Card seat; 32. Limiting rod; 33. Pressure seat; 34. Adjusting screw; 35. Sleeve rod; 36. Baffle plate. Detailed Implementation

[0020] The following will provide a more detailed description in conjunction with the accompanying drawings of the embodiments of the present invention: Please see Figures 1-7 As shown, the present invention provides a technical solution: a tensile strength testing device for air spring production, comprising a main structure 1, a tensile structure 2 detachably mounted on the main structure 1, and suspension structures 3 symmetrically arranged on the tensile structure 2; wherein, the main structure 1 is used for sealing and bearing to form a vacuum testing environment, the tensile structure 2 is used to drive the symmetrically arranged suspension structures 3 to move relative to or in opposite directions, and the suspension structures 3 are used to install air springs or single springs to realize tensile and compressive testing of the test piece.

[0021] As a preferred embodiment, the main structure 1 includes a detection box 11, a controller 12, a vacuum pump 13, a solenoid valve 14, a pressure detector 15, a pair of cameras 16, a pair of first slide rails 17, a pair of connecting arms 18, a box cover 19, and a sealing strip 10. The detection box 11 is a rectangular box without a right side wall, and supports are provided at the four corners of the lower wall of the detection box 11. A sealing groove is provided along the middle of the right side wall of the detection box 11. The controller 12 is fixedly installed in the middle of the front side wall of the detection box 11. The vacuum pump 13 is fixedly installed on the upper wall of the detection box 11 and near the left end. One end of the solenoid valve 14 is fixedly connected to the upper wall of the detection box 11 and is connected to the detection box 11. The other end of the solenoid valve 14 is connected to the suction end of the vacuum pump 13 through a pipe. The pressure detector 15 is fixedly installed on the upper wall of the detection box 11. A pair of cameras 16 are symmetrically arranged in the middle of the front and rear side walls inside the detection box 11. A pair of first slide rails 17 are symmetrically arranged inside the upper side wall of the detection box 11. The test chamber 11 has a wall, with one end of each of the connecting arms 18 fixedly mounted on the first slide rail 17, and the other end of the connecting arms 18 positioned on the right side of the test chamber 11. The cover 19 is fixedly mounted on the other end of the connecting arms 18 and is fastened to the right side of the test chamber 11. The sealing strip 10 is fixedly mounted on the left side wall of the cover 19 and is embedded in the sealing groove of the test chamber 11. The vacuum pump 13 is started by the controller 12, and the vacuum is drawn inside the test chamber 11 through the solenoid valve 14. The pressure change inside the test chamber 11 is detected by the air pressure detector 15, which can help detect whether the air spring is leaking. The appearance status of the test piece is detected in real time by the camera 16. By starting the first slide rail 17, the cover 19 is detached from the test chamber 11 by the connecting arms 18 to realize the placement or picking up operation. The main structure 1 is used to realize the sealing and bearing, construct the vacuum test environment, and complete the placement and picking up of the test piece, leakage detection, and appearance monitoring.

[0022] Vacuum testing environment construction and leak detection: After the air spring under test is fixed by the tension structure and the suspension structure, the cover 19 is moved along the first slide rail 17 to fasten the right side of the test box 11. The sealing strip 10 is embedded in the sealing groove to form a closed space. The vacuum pump 13 is started by the controller 12 and the solenoid valve 14 is activated to evacuate the test box 11. The air pressure detector 15 collects the air pressure data in the box in real time and transmits it to the controller 12. If the air spring leaks, the air pressure in the box will rise. The controller 12 will determine the leakage situation through data analysis.

[0023] Placement and retrieval of the test piece: When the test piece needs to be installed or removed, the controller 12 activates the first slide rail 17, which drives the connecting arm 18 and the box cover 19 to move to the right and disengage from the right opening of the test box 11, exposing the internal space for operation; after the operation is completed, the controller controls the first slide rail 17 to run in reverse, which drives the box cover 19 to move to the left and close the test box 11, and the sealing strip 10 is embedded in the sealing groove to complete the closure.

[0024] Real-time monitoring of the appearance of the test piece: Throughout the test, a pair of cameras 16 continuously capture images of the appearance of the test piece inside the test chamber 11 (such as deformation, breakage, etc.). The image data is transmitted to a display terminal or storage device for operators to observe in real time, while the data is stored for subsequent analysis.

[0025] As a preferred embodiment, the tensioning structure 2 includes a mounting base 21, a mounting frame 22, a second slide rail 23, a connecting frame 24, a third slide rail 25, and a testing unit 26. One end of the mounting base 21 is detachably mounted on the middle of the left side wall of the box cover 19. One end of the mounting frame 22 is fixedly mounted on the other end of the mounting base 21, and the mounting frame 22 is movably inserted into the testing box 11. The mounting base 21 is concave, and slide rails 27 are provided on the opposite side walls at both ends of the mounting base 21. A drive port 28 is opened in the middle of the rear side wall of the mounting base 21. The second slide rail 23 is fixedly mounted on the upper wall of the mounting base 21. One end of the connecting frame 24 is fixedly mounted on the second slide rail 23, and the connecting frame 24 is located behind the mounting frame 22. One end of the third slide rail 25 is fixedly mounted on the connecting frame 24, and the test unit 26 is fixedly mounted on the third slide rail 25, and the test unit 26 is movably embedded in the mounting frame 22; the mounting frame 22 is fixed to the box cover 19 by the mounting base 21, and the connecting frame 24 is moved left and right by the second slide rail 23 to increase the left and right movement range of the test unit 26 on the third slide rail 25 to accommodate different tensile tests. The test unit 26 can be detached from the mounting frame 22 by the second slide rail 23 and the third slide rail 25. The core of the tensile structure 2 is used to drive the symmetrically arranged suspension structure 3 to achieve relative or reverse movement to adapt to the tensile and pressure test requirements of test pieces of different specifications.

[0026] Adjustable range of motion: The connecting frame 24 can be moved left and right along the upper wall of the mounting base 21 by the second slide rail 23, and the connecting frame 24 in turn drives the third slide rail 25 to move synchronously, thereby expanding the left and right range of motion of the test unit 26 on the third slide rail 25. This design can flexibly adjust the initial position and travel of the test unit 26 according to the length specifications of the test piece (such as a short-sized air spring or a long-sized metal spring), to meet the tensile and compressive testing requirements of test pieces of different sizes.

[0027] The test unit 26 can be detached. When the test unit 26 needs to be maintained or calibrated, or when testing an extra-long test piece, the second slide rail 23 can be controlled to move the connecting frame 24 and the third slide rail 25 away from the mounting frame 22. At the same time, with the drive of the third slide rail 25, the test unit 26 can be gradually detached from the mounting frame 22 along the slide 27 and the drive port 28, so as to separate the test unit 26 from the mounting frame 22 and improve the convenience of equipment maintenance and the adaptability of the test scenario.

[0028] The driving function of the suspension structure 3: Since the suspension structure 3 is symmetrically arranged at one end of the test unit 26 and the mounting frame 22, when the third slide rail 25 drives the test unit 26 to move, it can drive the suspension structure 3 on the test unit to move closer to or away from the suspension structure 3 at one end of the mounting frame 22, that is, to realize the relative movement (compressing the test piece) or reverse movement (stretching the test piece) of the suspension structure 3, thereby completing the tensile strength and compressive performance test of test pieces of different specifications.

[0029] As a preferred embodiment, the test unit 26 includes a slide block 261, a lifting slide rail 262, and a gravity detector 263. One end of the slide block 261 is movably fitted into the mounting bracket 22, and one end of the slide block 261 is located between the slide rails 27. The other end of the slide block 261 movably passes through the drive port 28, and the other end of the slide block 261 is connected to the third slide rail 25. The slide block 261 moves left and right via the third slide rail 25. The lifting slide rail 262 is fixedly mounted on one end of the slide block 261 and is located on the front side of the mounting bracket 22. The gravity detector 263 is fixedly mounted on the lifting slide rail. On 262, the gravity detector 263 moves up and down via the lifting slide rail 262; the slide block 261 in the test unit 26 is connected to the third slide rail 25, and the third slide rail 25 drives the movement along the slide 27 and drive port 28 of the mounting frame 22, and the gravity detector 263 moves up and down via the lifting slide rail 262, thereby adjusting the height of the tension structure 2 located on the gravity detector 263 and changing the test mode. The suspension structure 3 is fixedly set on one front side of the mounting frame 22 and on the gravity detector 263, and the tension structures 2 are symmetrical to each other.

[0030] Lateral movement adjustment function: When the third slide rail 25 is activated and generates driving force, it drives the slide 261 to move through its connection with the slide 261; one end of the slide 261 slides along the inner cavity of the mounting bracket 22, while maintaining guidance along the slide rail 27 of the mounting base 21, and the other end moves synchronously along the drive port 28 to achieve stable lateral movement of the slide 261 as a whole; during the movement of the slide 261, the lifting slide rail 262, the gravity detector 263 and the suspension structure 3 on the gravity detector 263 are moved synchronously, so that the suspension structure 3 and the suspension structure 3 on the front side of one end of the mounting bracket 22 move relative to or in opposite directions, thereby completing the tensile or compression test action of the test piece.

[0031] Height adjustment and test mode switching function: When it is necessary to change the force angle of the test piece to switch the test mode (such as switching from horizontal force test to inclined force test), the lifting slide rail 262 is activated; the moving end of the lifting slide rail 262 drives the gravity detector 263 to move vertically, thereby driving the suspension structure 3 fixed on the gravity detector 263 to move synchronously; since the position of the suspension structure 3 on the front side of one end of the mounting bracket 22 is fixed, by adjusting the height of the suspension structure 3 on the gravity detector 263, the vertical relative position between the two sets of symmetrical suspension structures 3 can be changed, so that the test piece forms an inclined force state, thereby realizing the switching of the test mode and adapting to the multi-condition force scenarios of the test piece in actual applications.

[0032] During the tensile or compression test of the test piece, the gravity detector 263 collects the tensile or compressive force data acting on the test piece in real time and transmits the data to the controller 12 of the device (or the matching data processing terminal), providing accurate mechanical parameters for subsequent analysis of the tensile strength performance of the test piece.

[0033] As a preferred embodiment, the suspension structure 3 includes a mounting base 31, a pair of limiting rods 32, a pressure seat 33, an adjusting screw 34, several sleeve rods 35, and several baffles 36. The mounting base 31 is L-shaped, with one end of the mounting base 31 mounted on the gravity detector 263. One end of each pair of limiting rods 32 movably passes through the other end of the mounting base 31. The pressure seat 33 is L-shaped, with one end fixedly mounted on the other end of the pair of limiting rods 32, and the other end of the pressure seat 33 passing through the other end of the mounting base 31. One end of the adjusting screw 34 movably passes through one end of the pressure seat 33 and is located between the pair of limiting rods 32. The other end of the adjusting screw 34 is movably screwed into the other end of the mounting base 31. One end of each of the several sleeve rods 35 is a threaded rod with the same diameter, while the other ends of the sleeve rods 35 have different diameters. One end of each of the sleeve rods 35 is detachably screwed into the middle of the other end of the pressure seat 33. Furthermore, the sleeve rod 35 is located in front of the gravity detector 263, and several baffles 36 are detachably screwed onto the other end of the sleeve rod 35, with the diameter of the baffles 36 being larger than that of the sleeve rod 35. It is installed as a load-bearing support through the clamping seat 31. By adjusting the screw 34, the pressure seat 33 can be driven to bear force. Through the limiting rod 32, the pressure seat 33 can be moved closer or further away from the other end of the clamping seat 31. When testing an air spring, the shaft holes at both ends of the air spring can be sleeved onto the corresponding sleeve rod 35 and placed under the cover of the baffles 36. When testing a single spring, since the spring has a curved structure, the two ends of the spring can be clamped onto the other end of the clamping seat 31 through the gap, and then clamped and fixed by the pressure seat 33 and the clamping seat 31. The sleeve rods 35 in the suspension structure 3 can be opposite each other on the same horizontal line or located in staggered positions.

[0034] Clamping and fixing function (adapted to single metal springs): When the test object is a single metal spring (curved structure), first clamp both ends of the metal spring into the gap at the other end of the clamping seat 31; then rotate the adjusting screw 34 clockwise. Since the adjusting screw 34 is threadedly connected to the clamping seat 31, its rotation will be converted into axial movement in the direction of the clamping seat 31, thereby pushing the pressure seat 33 along the guide of the limiting rod 32 to approach the clamping seat 31; until the pressure seat 33 and the clamping seat 31 clamp both ends of the metal spring, stop rotating the adjusting screw 34 to complete the fixing of the metal spring; if disassembly is required, rotate the adjusting screw 34 counterclockwise to move the pressure seat 33 away from the clamping seat 31 and release the metal spring.

[0035] Sleeve fixing function (for air springs): When the test object is an air spring, select a sleeve rod 35 with the corresponding diameter according to the diameter specifications of the shaft holes at both ends of the air spring, and screw the threaded end of the sleeve rod 35 to the middle of the other end of the pressure seat 33; then, sleeve the shaft holes at both ends of the air spring onto the sleeve rods 35 of the two sets of symmetrical suspension structures 3 respectively; finally, screw the baffle 36 onto the non-threaded end of the sleeve rod 35. The baffle 36 is larger than the diameter of the sleeve rod 35, which prevents the air spring from falling off the sleeve rod 35 during the tensile or compression test, thus completing the fixing of the air spring; when replacing air springs of different specifications, it is only necessary to remove the baffle 36 and the sleeve rod 35 and replace the sleeve rod 35 with one of the corresponding diameter.

[0036] Test angle adaptation function: By adjusting the height of the lifting slide rail 262 in the test unit 26, the suspension structure 3 on the gravity detector 263 can be raised and lowered synchronously, so that the sleeve rods 35 in the two sets of symmetrical suspension structures 3 can be in the same horizontal line relative to each other to realize the horizontal force test of the air spring; or they can be in an alternating state to make the air spring form an inclined force angle, adapting to the test requirements of multiple working conditions and ensuring that the test data is more in line with the actual application scenario of the air spring.

[0037] The suspension structure 3 can flexibly adapt to the fixing requirements of air springs and single metal springs, taking into account both installation convenience and fixing stability. It also supports multi-angle testing and adjustment, enabling testing capabilities for multiple specifications and working conditions.

[0038] Working principle: Step 1: First, the device is placed horizontally on the table via the main structure 1. After powering on the device, the controller 12 can drive the first slide rail 17 on the upper wall of the detection box 11. With the activation of the first slide rail 17, the connecting arm 18 of a certain length drives the box cover 19 to detach from the detection box 11, opening the right side of the detection box 11, and at the same time removing the tension structure 2 and the suspension structure 3. Step 2: Connect the two ends of the air spring to be tested to the sleeve rod 35 of the suspension structure 3 through the shaft holes at both ends of the air spring, and then screw on the baffle 36 to block it, so as to realize the movable connection of the two ends of the air spring. Step 3: After the test piece is installed, start the first slide rail 17 to drive the box cover 19 to reset, use the sealing strip 10 on the side wall of the box cover 19 to seal the test box 11, and drive the air spring into the test box 11. Step 4: Imaging is performed through camera 16, allowing external observation of the internal state; then vacuum pump 13 is started, and vacuum is drawn inside the detection box 11 through the switching of solenoid valve 14. The internal air pressure is detected by air pressure detector 15. When the vacuum reaches a certain air pressure, vacuum pump 13 is stopped and solenoid valve 14 is closed. Step 5: At this time, the vacuum state inside the test chamber 11 will not be affected by the atmospheric pressure generated outside; then the third slide rail 25 in the tension structure 2 will be activated, and the test unit 26 will be driven through the drive port 28 via the third slide rail 25, and then moved within the mounting bracket 22 fixed by the mounting base 21, so that the two symmetrically arranged suspension structures 3 can be stretched away from each other or compressed relative to each other. Step 6: When the third slide rail 25 moves the slide block 261 within the mounting frame 22, it simultaneously moves the gravity detector 263. The gravity detector 263 is connected to one end of the air spring through the suspension structure 3 located on the gravity detector 263 to receive force, thus achieving measurement. During the measurement, the internal air pressure change is detected by the air pressure detector 15 to test for air leakage. Step 7: During the test, by activating the lifting slide rail 262, the gravity detector 263 and the suspension structure 3 are raised and lowered to adjust the height, thereby realizing the tilt force or horizontal force test at both ends of the air spring. Step 8: When testing a metal spring, both ends of the metal spring can be clipped onto the clamping seat 31. By rotating the adjusting screw 34, the pressure seat 33, which is limited by the two limiting rods 32, can be moved, causing the pressure seat 33 to squeeze and clamp the metal spring to achieve fixation. If testing different air springs, the sleeve rod 35 of the corresponding diameter can be replaced. Step 9: After the metal spring is installed, it can be tested outside or inside the test box 11. If it is tested outside the test box 11, the second slide rail 23 can be activated, and the third slide rail 25 can be moved by the connecting frame 24. The third slide rail 25 can be activated synchronously, and the test unit 26 on the third slide rail 25 can be detached from the mounting frame 22, thereby increasing the relative distance between the two suspension structures 3 and increasing the tensile measurement range.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Other modifications or functional substitutions made by those skilled in the art to the technical solutions of the present invention, as long as they do not depart from the spirit and scope of the technical solutions of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A tensile strength testing device for air spring production, characterized in that, It includes a main structure (1), on which a tension structure (2) is detachably installed, and on which a suspension structure (3) is symmetrically arranged; Among them, the main structure (1) is used to seal and bear the load, forming a vacuum testing environment; the tension structure (2) is used to drive the symmetrically arranged suspension structure (3) to move relative to or in the opposite direction; the suspension structure (3) is used to install air springs or single metal springs to realize the tensile and pressure tests on the test piece. The main structure (1) includes a detection box (11), a controller (12), a vacuum pump (13), a solenoid valve (14), a pressure detector (15), and a pair of cameras (16). The controller (12) is fixedly installed in the middle of the front side wall of the detection box (11). The vacuum pump (13) is fixedly installed on the upper wall of the detection box (11) and close to the left end. One end of the solenoid valve (14) is fixedly connected to the upper wall of the detection box (11) and the solenoid valve (14) is connected to the detection box (11). The other end of the solenoid valve (14) is connected to the suction end of the vacuum pump (13) through a pipe. The air pressure detector (15) is fixedly installed on the upper wall of the detection box (11). A pair of cameras (16) are symmetrically installed in the middle of the front and rear side walls of the detection box (11).

2. The tensile strength testing device for air spring production according to claim 1, characterized in that, The testing box (11) is a rectangular box without a right side wall, and supports are provided at the four corners of the lower wall of the testing box (11). A sealing groove is provided along the middle of the right side wall of the testing box (11).

3. The tensile strength testing device for air spring production according to claim 2, characterized in that, The main structure (1) also includes a pair of first slide rails (17), a pair of connecting arms (18), a box cover (19), and a sealing strip (10). A pair of first slide rails (17) are symmetrically arranged on the upper inner wall of the test box (11). One end of a pair of connecting arms (18) is fixedly arranged on the first slide rail (17), and the other end of the connecting arm (18) can be located on the right side of the test box (11). The box cover (19) is fixedly arranged on the other end of the pair of connecting arms (18), and the box cover (19) is fastened to the right side of the test box (11). The sealing strip (10) is fixedly arranged on the left side wall of the box cover (19), and the sealing strip (10) is embedded in the sealing groove of the test box (11).

4. The tensile strength testing device for air spring production according to claim 3, characterized in that, The tension structure (2) includes a mounting base (21), a mounting bracket (22), a second slide rail (23), a connecting bracket (24), a third slide rail (25), and a testing unit (26); One end of the mounting base (21) is detachably mounted on the middle of the left side wall of the box cover (19). One end of the mounting bracket (22) is fixedly mounted on the other end of the mounting base (21), and the mounting bracket (22) is movably inserted into the test box (11). The mounting base (21) is concave, and slide rails (27) are provided on the opposite side walls at both ends of the mounting base (21). A drive port (28) is opened in the middle of the rear side wall of the mounting base (21). The second slide rail (23) is fixedly mounted on the upper wall of the mounting base (21). One end of the connecting bracket (24) is fixedly mounted on the second slide rail (23), and the connecting bracket (24) is located on the rear side of the mounting bracket (22). One end of the third slide rail (25) is fixedly mounted on the connecting bracket (24). The test unit (26) is fixedly mounted on the third slide rail (25), and the test unit (26) is movably embedded in the mounting bracket (22).

5. The tensile strength testing device for air spring production according to claim 4, characterized in that, The test unit (26) includes a slide (261), a lifting slide rail (262), and a gravity detector (263). One end of the slide (261) is movably embedded in the mounting bracket (22), and one end of the slide (261) is located between the slide rails (27). The other end of the slide (261) movably passes through the drive port (28), and the other end of the slide (261) is connected to the third slide rail (25). The slide (261) moves left and right through the third slide rail (25). The lifting slide rail (262) is fixedly set on one end of the slide (261), and the lifting slide rail (262) is located on the front side of the mounting bracket (22). The gravity detector (263) is fixedly set on the lifting slide rail (262), and the gravity detector (263) moves up and down through the lifting slide rail (262).

6. The tensile strength testing device for air spring production according to claim 5, characterized in that, The suspension structure (3) includes a card seat (31), a pair of limit rods (32), a pressure seat (33), an adjusting screw (34), several sleeve rods (35), and several baffles (36). The card holder (31) is L-shaped, with one end of the card holder (31) mounted on the gravity detector (263). One end of each pair of limiting rods (32) movably passes through the other end of the card holder (31). The pressure seat (33) is L-shaped, with one end of the pressure seat (33) fixedly mounted on the other end of the pair of limiting rods (32), and the other end of the pressure seat (33) can pass through the other end of the card holder (31). One end of the adjusting screw (34) movably passes through one end of the pressure seat (33) and is located on the pair of limiting rods (32). Between them, the other end of the adjusting screw (34) is movably screwed into the other end of the card seat (31), one end of each of the several sleeve rods (35) is a threaded rod with the same diameter, and the other end of each sleeve rod (35) has a different diameter. One end of each of the several sleeve rods (35) is detachably screwed into the middle of the other end of the pressure seat (33), and the sleeve rod (35) is located in front of the gravity detector (263). Each of the several baffles (36) is detachably screwed into the other end of the sleeve rod (35), and the diameter of the baffle (36) is larger than that of the sleeve rod (35).

7. The tensile strength testing device for air spring production according to claim 6, characterized in that, The suspension structure (3) is fixedly installed on the front side of one end of the mounting frame (22) and the gravity detector (263), and the tension structure (2) is symmetrical to each other.

8. The tensile strength testing device for air spring production according to claim 7, characterized in that, The sleeves (35) in the suspension structure (3) can be opposite each other on the same horizontal line or located in staggered positions.

9. The tensile strength testing device for air spring production according to claim 8, characterized in that, The test unit (26) can be detached from the mounting bracket (22) via the second slide rail (23) and the third slide rail (25).

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