Tensile strength testing device for air spring production

Abstract

The application relates to the technical field of spring detection equipment, and discloses a tensile strength testing device for air spring production, which comprises a main body structure, a tensile structure detachably mounted on the main body structure, and suspension structures symmetrically arranged on the tensile structure. The main body structure is used for guaranteeing detection accuracy, adaptability and operation safety, realizing high air leakage detection accuracy, adapting to different specifications of test requirements, guaranteeing personnel operation safety, improving test scene adaptability and data detection comprehensiveness through the tensile structure, adapting to multi-size and multi-type spring testing, realizing multi-working-condition mechanical data detection, and improving the comprehensive practical value of the equipment through the suspension structure, which is used for strengthening the adaptability and installation convenience of different specifications of springs, being compatible with air spring and metal spring installation testing, and improving the comprehensive practical value of the equipment.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of spring detection equipment, in particular to a tensile strength testing device for air spring production. BACKGROUND

[0002] The air spring is a key component with supporting, buffering, damping and adjusting functions and is widely applied to the fields of automobile suspensions, rail transit vehicles, engineering machinery and precise instrument equipment; the tensile strength of the air spring directly determines the structural stability and safety of the product in the dynamic load and long-term use process, and if the tensile strength is not up to the standard, faults such as fracture, deformation and air leakage are prone to occur, which not only affects the normal operation of equipment but also may cause safety accidents.

[0003] Therefore, in the air spring production process, the detection of the tensile strength and related performances such as sealing performance and deformation resistance is a core link for guaranteeing product quality and application safety, however, the current mainstream air spring tensile strength testing device has single detection function and cannot consider multidimensional performance evaluation, only can realize the tensile strength mechanical parameter detection of the air spring or single spring, has insufficient adaptability and cannot be compatible with multiple types and multiple specifications of measured parts, and in the test, the air spring is horizontally or vertically tested at two ends, and multi-angle stress testing cannot be realized. SUMMARY

[0004] In view of the defects of the prior art, the tensile strength testing device for air spring production solves the problems of single test and weak adaptability in the prior art, and realizes the multidirectional test function and the characteristics of different specifications of products.

[0005] To achieve the above object, the application provides the following technical scheme: a tensile strength testing device for air spring production, comprising a main body structure, a tensile structure being detachably installed on the main body structure, and a suspension structure being symmetrically arranged on the tensile structure; wherein the main body structure is used for sealing and bearing and forms a vacuum detection environment, the tensile structure is used for driving the symmetrically arranged suspension structure to move relatively or reversely, and the suspension structure is used for installing an air spring or a single spring and realizing the tensile and pressure test of the measured part.

[0006] Preferably, the main body structure comprises a detection box, a controller, a vacuum pump, an electromagnetic valve, an air pressure detector and a pair of cameras; the controller is fixedly arranged in the middle of the front side wall of the detection box, the vacuum pump is fixedly arranged on the upper wall of the detection box and close to the left end, one end of the electromagnetic valve is fixedly connected to the upper wall of the detection box and the electromagnetic valve is communicated with the detection box, the other end of the electromagnetic valve is connected with the air suction end of the vacuum pump through a pipeline, the air pressure detector is fixedly arranged 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 in the detection box.

[0007] Preferably, the detection box is a rectangular box without right side wall, and the detection box is provided with supports at four corners of lower wall, and the right side wall of the detection box is provided with a sealing groove along the middle part.

[0008] Preferably, the main body structure further comprises a pair of first sliding rails, a pair of connecting arms, a box cover and a sealing strip; the pair of first sliding rails are symmetrically arranged on the upper wall of the detection box, one end of the pair of connecting arms is respectively fixedly arranged on the first sliding rail, and the other end of the connecting arm can be located on the right side of the detection box, the box cover is fixedly arranged on the other end of the pair of connecting arms, and the box cover is buckled on the right side of the detection box, and the sealing strip is fixedly arranged on the left side wall of the box cover and embedded in the sealing groove of the detection box.

[0009] Preferably, the stretching structure comprises a mounting seat, a mounting frame, a second sliding rail, a connecting frame, a third sliding rail and a test unit; one end of the mounting seat is detachably arranged on the middle part of the left side wall of the box cover, one end of the mounting frame is fixedly arranged on the other end of the mounting seat, and the mounting frame is movably inserted into the detection box, the mounting seat is concave, and the opposite side walls of the two ends of the mounting seat are provided with sliding channels, a driving opening is formed in the middle part of the rear side wall of the mounting seat, the second sliding rail is fixedly arranged on the upper wall of the mounting seat, one end of the connecting frame is fixedly arranged on the second sliding rail, and the connecting frame is located on the rear side of the mounting frame, one end of the third sliding rail is fixedly arranged on the connecting frame, and the test unit is fixedly arranged on the third sliding rail and movably embedded on the mounting frame.

[0010] Preferably, the test unit comprises a sliding seat, a lifting sliding rail and a gravity detector; one end of the sliding seat is movably embedded in the mounting frame, and the other end of the sliding seat is located between the sliding channels, the other end of the sliding seat is movably penetrated through the driving opening, and the other end of the sliding seat is connected with the third sliding rail, the sliding seat moves left and right through the third sliding rail, the lifting sliding rail is fixedly arranged on one end of the sliding seat and located on the front side of the mounting frame, and the gravity detector is fixedly arranged on the lifting sliding rail and moves up and down through the lifting sliding rail.

[0011] Preferably, the suspension structure comprises a clamping seat, a pair of limiting rods, a pressing seat, an adjusting screw, a plurality of sleeve rods and a plurality of blocking pieces; the clamping seat is L-shaped, one end of the clamping seat is arranged on the gravity detector, one end of the pair of limiting rods is movably penetrated through the other end of the clamping seat, the pressing seat is L-shaped, one end of the pressing seat is fixedly arranged on the other end of the pair of limiting rods, and the other end of the pressing seat can be penetrated through the other end of the clamping seat, one end of the adjusting screw is movably penetrated through one end of the pressing seat and located between the pair of limiting rods, the other end of the adjusting screw is movably screwed into the other end of the clamping seat, one end of the plurality of sleeve rods is a threaded rod with the same diameter, and the other end of the sleeve rod has different diameters, one end of the plurality of sleeve rods is detachably screwed into the middle part of the other end of the pressing seat and located on the front side of the gravity detector, and the plurality of blocking pieces are detachably screwed on the other end of the sleeve rod, and the diameter of the blocking piece is greater than that of the sleeve rod.

[0012] Preferably, the suspension structure is fixedly arranged on the front side of one end of the mounting frame and the gravity detector respectively, and the stretching structure is symmetrical to each other.

[0013] Preferably, the sleeve rod in the suspension structure can be opposite on the same horizontal line, or located in the upper and lower staggered corresponding positions.

[0014] Preferably, the test unit can be separated from the mounting frame through the second sliding rail and the third sliding rail.

[0015] Compared with the prior art, the beneficial effects of the present application are:

[0016] 1. High precision of air leakage detection: The main structure forms a sealed cavity through the cooperation of the electric control switch box cover, the sealing strip and the sealing groove, and constructs a vacuum detection environment combined with the vacuum pump and the electromagnetic valve, which can accurately capture the weak air leakage of the air spring caused by air pressure. Compared with traditional non-vacuum detection, air pressure changes in a vacuum environment are more easily identified by an air pressure detector, which can effectively avoid the interference of weak air leakage signals by the environment and greatly improve the sensitivity and accuracy of air leakage detection. The box cover is flexibly opened and closed through electric control driving, and in the open state, it can fully match the stroke range of the stretching structure. Whether it is a short-sized small air spring or a long-sized steel spring, the test can be completed through the stroke adjustment of the stretching structure, without the need to replace the detection cavity or adjust the device main body due to product specification differences, which significantly widens the size coverage range of the tested products.

[0017] 2. The stretching structure flexibly adjusts the distance between the two symmetrical suspension structures through the cooperation of the test unit. For air springs of different sizes (such as length, thickness difference) and metal springs, only the distance between the suspension structures needs to be adjusted to realize stable fixation and testing without the need to replace the stretching assembly, which reduces the equipment adaptation cost. The stretching structure can drive the suspension structure to move relatively or reversely, complete the stretching and compression test of the air spring and the metal spring, and simultaneously obtain complete mechanical data through the gravity detector. On the other hand, the height of the gravity detector can be adjusted by the lifting sliding rail in the test unit to change the vertical position of the suspension structure, so that the air spring can not only be tested under horizontal stress, but also be tested under inclined and multi-angle stress, which fits the complex stress scenarios of the spring in actual application and makes the test data closer to the real use state.

[0018] 3、The suspension structure is adapted to two types of springs through the double design of "sleeve rod and stop sheet" and "clamping seat and pressing seat". For the air spring with a shaft hole, a sleeve rod with a corresponding diameter is selected, the spring shaft hole is sleeved on the sleeve rod, and then the stop sheet is limited and fixed. For the curved metal spring, the pressing seat is driven to cooperate with the clamping seat by rotating the adjusting screw rod, so that the two ends of the spring are clamped and fixed, without the need of additional special clamps, and the adaptability is very strong. The sleeve rod is designed to be detachably screwed, and different sleeve rods with different diameters can be replaced to adapt to air springs with different shaft hole specifications. The clamping distance of the pressing seat and the clamping seat can be flexibly adjusted through the adjusting screw rod, and can adapt to metal springs with different thicknesses and lengths. The whole installation process does not need complex tools, is convenient to operate, greatly shortens the preparation time when different specifications of products are switched, improves the detection efficiency, and reduces the cost.

[0019] 4、The device can test air springs and metal springs at the same time. From the product specifications, through the design of spacing adjustment, sleeve rod replacement and clamping adjustment, springs with different sizes and structures are covered. From the test requirements, the multi-dimensional requirements such as air leakage detection, mechanical property detection and multi-angle working condition test are considered, and one device can replace the functions of multiple traditional special detection devices, reduce the equipment investment of enterprises, and improve the comprehensive practical value of the device. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is an assembly structure diagram of the present application.

[0021] Figure 2 It is a split structure diagram of the main body structure of the present application.

[0022] Figure 3 It is an assembly display structure diagram of the suspension structure and the stretching structure of the present application.

[0023] Figure 4 It is a split structure diagram of the stretching structure of the present application.

[0024] Figure 5 It is a test unit structure diagram of the present application.

[0025] Figure 6 It is a split structure diagram of the suspension structure of the present application.

[0026] Figure 7 It is an enlarged view of A in Figure 3

[0027] ​In the figure: 1, the main structure, 11, detection box, 12, controller, 13, vacuum pump, 14, electromagnetic valve, 15, air pressure detector, 16, camera, 17, the first sliding rail, 18, connecting arm, 19, box cover, 10, sealing strip, 2, stretching structure, 21, mounting seat, 22, mounting frame, 23, the second sliding rail, 24, connecting frame, 25, the third sliding rail, 26, test unit, 261, sliding seat, 262, lifting slide rail, 263, gravity detector, 27, slide, 28, drive port, 3, suspension structure, 31, card seat, 32, limit rod, 33, pressing seat, 34, adjusting screw, 35, sleeve rod, 36, baffle. DETAILED DESCRIPTION

[0028] The application will be further described below with reference to the accompanying drawings of the embodiments of the application:

[0029] Please refer to Figures 1-7 The application provides a technical solution: a tensile strength testing device for air spring production, comprising a main structure 1, the main structure 1 is detachably installed with a stretching structure 2, and the stretching structure 2 is symmetrically provided with a suspension structure 3; wherein the main structure 1 is used for sealing and bearing to form a vacuum detection environment, the stretching structure 2 is used to drive the symmetrically arranged suspension structure 3 to move relatively or reversely, and the suspension structure 3 is used to install air springs or single springs to realize the tensile and pressure test of the measured member.

[0030] As a preferred solution, the main structure 1 comprises a detection box 11, a controller 12, a vacuum pump 13, a solenoid valve 14, a gas pressure detector 15, a pair of cameras 16, a pair of first sliding 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 the lower wall of the detection box 11 is provided with supports at the four corner parts; the right side wall of the detection box 11 is provided with a sealing groove along the middle part; the controller 12 is fixedly arranged on the middle part of the front side wall of the detection box 11; the vacuum pump 13 is fixedly arranged on the upper wall of the detection box 11 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 communicates with 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 pipeline; the gas pressure detector 15 is fixedly arranged on the upper wall of the detection box 11; the pair of cameras 16 are symmetrically arranged on the inner front and rear side walls of the detection box 11; the pair of first sliding rails 17 are symmetrically arranged on the upper wall of the detection box 11; one end of the pair of connecting arms 18 is fixedly arranged on the first sliding rails 17 respectively, and the other end of the connecting arms 18 can be located on the right side of the detection 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 buckled on the right side of the detection 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 detection box 11; the vacuum pump 13 is started by the controller 12, and the inside of the detection box 11 can be vacuumized through the solenoid valve 14; the change of the internal gas pressure after vacuumization is detected by the gas pressure detector 15, which can assist in detecting whether the air spring leaks; the appearance state of real-time testing can be imaged and detected by the cameras 16; the box cover 19 is separated from the detection box 11 by the connecting arms 18 through the starting of the first sliding rails 17, so as to realize the putting or picking operation; the main structure 1 is used for realizing sealed bearing, constructing a vacuum detection environment, and completing the putting and picking of the measured member, air leakage detection and appearance monitoring.

[0031] Vacuum detection environment construction and air leakage detection: after the measured air spring is fixed through the stretching structure and the suspension structure, the box cover 19 is buckled on the right side of the detection box 11 by moving along the first sliding rail 17, and 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 to vacuumize the detection box 11 through the conductive solenoid valve 14, and the gas pressure detector 15 collects the gas pressure data in the box in real time and transmits them to the controller 12; if the air spring leaks, the gas pressure in the box rises, and the controller 12 judges the air leakage condition through data analysis.

[0032] Putting and picking of the measured member: when the measured member needs to be installed or removed, the controller 12 starts the first sliding rail 17 to drive the connecting arm 18 and the box cover 19 to move rightward to separate from the opening on the right side of the detection box 11, so as to expose the internal space for operation; after the operation is completed, the first sliding rail 17 is operated in the reverse direction to drive the box cover 19 to move leftward to be buckled on the detection box 11, and the sealing strip 10 is embedded in the sealing groove to complete the closure.

[0033] Real-time appearance monitoring of the measured piece: During the entire test, a pair of cameras 16 continuously take pictures of the appearance state (such as deformation, fracture, etc.) of the measured piece in the test box 11, and the image data is transmitted to a display terminal or a storage device for real-time observation by the operator, and the data is also stored for subsequent analysis.

[0034] As a preferred solution, the stretching structure 2 includes a mounting seat 21, a mounting frame 22, a second sliding rail 23, a connecting frame 24, a third sliding rail 25, and a test unit 26; one end of the mounting seat 21 is detachably arranged in the middle of the left side wall of the box cover 19, one end of the mounting frame 22 is fixedly arranged on the other end of the mounting seat 21, and the mounting frame 22 is movably inserted into the test box 11, the mounting seat 21 is concave, and the opposite side walls at both ends of the mounting seat 21 are provided with sliding channels 27, a driving opening 28 is formed in the middle of the rear side wall of the mounting seat 21, the second sliding rail 23 is fixedly arranged on the upper wall of the mounting seat 21, one end of the connecting frame 24 is fixedly arranged on the second sliding rail 23, and the connecting frame 24 is located behind the mounting frame 22, one end of the third sliding rail 25 is fixedly arranged on the connecting frame 24, and the test unit 26 is fixedly arranged on the third sliding rail 25 and movably embedded in the mounting frame 22; the mounting frame 22 is fixed on the box cover 19 through the mounting seat 21, the connecting frame 24 is moved left and right by the second sliding rail 23, the moving range of the test unit 26 on the third sliding rail 25 is increased, different stretching tests are adapted, and the test unit 26 can be separated from the mounting frame 22 through the second sliding rail 23 and the third sliding rail 25. The core of the stretching structure 2 is used to drive the symmetrically arranged suspension structure 3 to move relatively or reversely, so as to adapt to the stretching and pressure test requirements of different specifications of the measured piece.

[0035] Moving range adjustment function: the connecting frame 24 can be driven by the second sliding rail 23 to move left and right along the upper wall of the mounting seat 21, and the connecting frame 24 drives the third sliding rail 25 to move synchronously, thereby expanding the left and right moving range of the test unit 26 on the third sliding rail 25; according to the length specifications of the measured piece (such as short-size air springs and long-size metal springs), the initial position and moving stroke of the test unit 26 can be flexibly adjusted, and the stretching and pressure test requirements of different sizes of the measured piece are adapted.

[0036] Separation function of the test unit 26: when the test unit 26 needs to be maintained, calibrated, or tested for an ultra-long large-size measured piece, the connecting frame 24 and the third sliding rail 25 can be moved away from the mounting frame 22 by controlling the second sliding rail 23, and the test unit 26 is gradually separated from the mounting frame 22 along the sliding channel 27 and the driving opening 28 by driving the third sliding rail 25, so as to realize the separation of the test unit 26 and the mounting frame 22, and improve the maintenance convenience and test scene adaptability of the equipment.

[0037] The driving function of the hanging structure 3: since the hanging 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, the hanging structure 3 on the test unit can drive the hanging structure 3 at one end of the mounting frame 22 to move close to or away from the hanging structure 3 at one end of the mounting frame 22, that is, the relative movement (compression of the measured member) or reverse movement (stretching of the measured member) of the hanging structure 3 is realized, so as to complete the tensile strength and pressure performance test of the measured member of different specifications.

[0038] As a preferred solution, the test unit 26 comprises a sliding seat 261, a lifting slide rail 262 and a gravity detector 263; one end of the sliding seat 261 is movably embedded in the mounting frame 22, and the other end of the sliding seat 261 is located between the slide rails 27, the other end of the sliding seat 261 movably penetrates the driving port 28, and the other end of the sliding seat 261 is connected with the third slide rail 25, the sliding seat 261 moves left and right through the third slide rail 25, the lifting slide rail 262 is fixedly arranged at one end of the sliding seat 261, and the lifting slide rail 262 is located at the front side of the mounting frame 22, the gravity detector 263 is fixedly arranged on the lifting slide rail 262, and the gravity detector 263 moves up and down through the lifting slide rail 262; the sliding seat 261 in the test unit 26 is connected with the third slide rail 25, and moves along the slide rails 27 and the driving port 28 of the mounting frame 22 through the third slide rail 25, the gravity detector 263 moves up and down through the lifting slide rail 262, the height of the stretching structure 2 located on the gravity detector 263 is adjusted, the test mode is changed, the hanging structure 3 is fixedly arranged at the front side of one end of the mounting frame 22 and on the gravity detector 263 respectively, and the stretching structure 2 is symmetrically arranged.

[0039] The lateral movement adjustment function: when the third slide rail 25 is started and driving force is generated, the third slide rail 25 drives the sliding seat 261 to move through the connection with the sliding seat 261; one end of the sliding seat 261 slides along the inner cavity of the mounting frame 22, and the other end moves along the slide rails 27 of the mounting seat 21 to keep guidance, and the other end moves along the driving port 28 to realize the stable lateral movement of the whole sliding seat 261; the lifting slide rail 262, the gravity detector 263 and the hanging structure 3 on the gravity detector 263 are synchronously moved in the movement process of the sliding seat 261, so that the hanging structure 3 and the hanging structure 3 at the front side of one end of the mounting frame 22 produce relative or reverse movement, and then the stretching or compression test action of the measured member is completed.

[0040] High adjustment and test mode switching function: when the force angle of the measured object needs to be changed to switch the test mode (such as switching from horizontal force test to inclined force test), the lifting slide rail 262 is started; 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 suspension structure 3 at the front side of one end of the mounting frame 22 is fixed in position, by adjusting the height of the suspension structure 3 on the gravity detector 263, the vertical relative position between the two symmetrical suspension structures 3 can be changed, so that the measured object forms an inclined force state, thereby realizing the switching of the test mode and adapting to the multi-working condition force scenario of the measured object in actual application.

[0041] During the tensile or compressive test of the measured object, the gravity detector 263 collects the tensile or compressive data of the measured object acting thereon in real time, and transmits the data to the controller 12 (or a matching data processing terminal) of the device, thereby providing accurate mechanical parameters for subsequent analysis of the tensile strength performance of the measured object.

[0042] As a preferred solution, the suspension structure 3 comprises a clamping seat 31, a pair of limiting rods 32, a pressing seat 33, an adjusting screw rod 34, a plurality of sleeve rods 35, and a plurality of blocking pieces 36; the clamping seat 31 is L-shaped, one end of the clamping seat 31 is arranged on the gravity detector 263, one end of the pair of limiting rods 32 is movably penetrated through the other end of the clamping seat 31, the pressing seat 33 is L-shaped, one end of the pressing seat 33 is fixedly arranged on the other end of the pair of limiting rods 32, and the other end of the pressing seat 33 can be penetrated through the other end of the clamping seat 31, one end of the adjusting screw rod 34 is movably penetrated through one end of the pressing seat 33 and located between the pair of limiting rods 32, the other end of the adjusting screw rod 34 is movably screwed into the other end of the clamping seat 31, one end of each of the plurality of sleeve rods 35 is a threaded rod with the same diameter, and the other end of each of the plurality of sleeve rods 35 has a different diameter, one end of each of the plurality of sleeve rods 35 is detachably screwed into the middle of the other end of the pressing seat 33, and the plurality of sleeve rods 35 are located in front of the gravity detector 263, and each of the plurality of blocking pieces 36 is detachably screwed onto the other end of each of the plurality of sleeve rods 35, and the diameter of each of the plurality of blocking pieces 36 is greater than that of each of the plurality of sleeve rods 35; the clamping seat 31 is installed as a bearing support body, the pressing seat 33 can be forced by rotating the adjusting screw rod 34, the pressing seat 33 can be close to or away from the other end of the clamping seat 31 by limiting of the limiting rods 32, when testing the air spring, the shaft holes at both ends of the air spring can be sleeved on the corresponding sleeve rods 35 and arranged by blocking pieces 36; when testing a single spring body, since the spring is a curved structure, the two ends of the spring can be clamped on the other end of the clamping seat 31 through a gap, and then clamped and fixed by the pressing seat 33 and the clamping seat 31, the sleeve rods 35 in the suspension structure 3 can be opposite on the same horizontal line or be opposite in an up-down staggered manner.

[0043] Clamping and fixing function (adapt to single metal spring): when the test object is a single metal spring (curve structure), the two ends of the metal spring are clamped in the gap at the other end of the clamping seat 31; then the adjusting screw 34 is rotated clockwise, and since the adjusting screw 34 is screwed with the clamping seat 31, its rotation will be converted into axial movement towards the clamping seat 31, thereby pushing the pressing seat 33 along the guide of the limiting rod 32 to approach the clamping seat 31; until the pressing seat 33 and the clamping seat 31 jointly clamp the two ends of the metal spring, stop rotating the adjusting screw 34, and complete the fixation of the metal spring; if disassembly is required, rotate the adjusting screw 34 counterclockwise to make the pressing seat 33 away from the clamping seat 31, and release the metal spring.

[0044] Sleeve fixing function (adapt to air spring): when the test object is an air spring, according to the diameter specification of the shaft hole at both ends of the air spring, select the corresponding diameter sleeve rod 35, screw the threaded rod end of the sleeve rod 35 to the middle of the other end of the pressing seat 33; then the shaft holes at both ends of the air spring are respectively sleeved on the sleeve rods 35 of the two groups of symmetrical suspension structures 3; finally, the stopper 36 is screwed on the non-threaded rod end of the sleeve rod 35, and the diameter of the stopper 36 is larger than that of the sleeve rod 35, which prevents the air spring from falling off the sleeve rod 35 during the stretching or compression test, and completes the fixation of the air spring; when replacing air springs of different specifications, only the stopper 36 and the sleeve rod 35 need to be disassembled, and the corresponding diameter sleeve rod 35 can be replaced.

[0045] 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 lifted synchronously, so that the sleeve rods 35 in the two groups of symmetrical suspension structures 3 can be opposite on the same horizontal line to realize the horizontal force test of the air spring; or they can be in a staggered corresponding state, so that the air spring forms an inclined force angle, adapting to the test requirements of multiple working conditions and ensuring that the test data are more suitable for the actual application scenarios of the air spring.

[0046] The suspension structure 3 can flexibly adapt to the fixing requirements of air springs and single metal springs, taking into account the convenience and stability of installation, while supporting multi-angle test adjustment, and can realize the test capability of multiple specifications and multiple working conditions.

[0047] Working principle:

[0048] Step 1, first, the device is horizontally placed on the desktop through the main structure 1, and after the device is powered on, the first slide rail 17 on the inner upper wall of the detection box 11 can be driven by the controller 12; through the start of the first slide rail 17, the box cover 19 is separated from the detection box 11 by means of the connecting arm 18 with a certain length, opening the right side of the detection box 11, and moving the stretching structure 2 and the suspension structure 3 out at the same time;

[0049] Step 2, the ends of the air spring to be tested are respectively sleeved on the sleeve rod 35 of the suspension structure 3 through the shaft hole sleeves at the two ends of the air spring, and then the baffle 36 is screwed to shield, so that the two ends of the air spring are movably connected;

[0050] Step 3, after the detection piece is installed, the first slide rail 17 is started to drive the box cover 19 to reset, the sealing strip 10 on the side wall of the box cover 19 is used for sealing detection box 11, and the air spring is driven into the detection box 11;

[0051] Step 4, imaging is performed by the camera 16, so that the internal state can be observed externally; then the vacuum pump 13 is started, the detection box 11 is vacuumized through the switching of the electromagnetic valve 14, and the internal air pressure is detected by the air pressure detector 15; when the vacuumization reaches a certain air pressure, the vacuum pump 13 is stopped and the electromagnetic valve 14 is closed;

[0052] Step 5, at this time, the internal vacuum state of the detection box 11 will not be affected by the external atmospheric pressure; then the third slide rail 25 in the stretching structure 2 is started, the test unit 26 is driven to pass through the driving port 28, and then moves in the mounting bracket 22 fixed by the mounting seat 21, so that the two symmetrically arranged suspension structures 3 are stretched away or compressed relative to each other;

[0053] Step 6, when the third slide rail 25 drives the sliding seat 261 to move in the mounting bracket 22, the gravity detector 263 is synchronously driven to move, the suspension structure 3 on the gravity detector 263 is connected with one end of the air spring to bear the force, so that the measurement is realized, and in the measurement, the internal air pressure change is detected by the air pressure detector 15 to test whether it leaks;

[0054] Step 7, in the test, the lifting slide rail 262 is started to drive the gravity detector 263 and the suspension structure 3 to adjust the height, so that the tilt force or the horizontal force test of the two ends of the air spring is realized;

[0055] Step 8, when the metal spring is detected, the two ends of the metal spring can be clamped on the clamping seat 31, the pressure seat 33 limited by the two limiting rods 32 is driven to move by rotating the adjusting screw 34, so that the pressure seat 33 extrudes and clamps the metal spring, so that the metal spring is fixed; if different air springs are tested, the sleeve rod 35 of the corresponding diameter can be replaced;

[0056] Step 9, after the metal spring is installed, it can be tested outside the detection box 11 or inside the detection box 11; if it is tested outside the detection box 11, the second slide rail 23 is started to drive the third slide rail 25 to move through the connecting frame 24, so that the third slide rail 25 is started synchronously, the test unit 26 on the third slide rail 25 is separated from the mounting bracket 22, and then the relative distance between the two suspension structures 3 is increased, so that the stretching measurement range is increased.

[0057] Finally, it is to be explained that the above embodiments are only used to illustrate the technical solutions of the present application but not to limit the present application, and other modifications or functional replacements of the technical solutions of the present application made by those skilled in the art should be covered in the scope of claims of the present application as long as they do not deviate from the spirit and scope of the technical solutions of the present application.

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), and a pair of cameras (16) are symmetrically installed in the middle of the front and rear side walls of the detection box (11); 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 frame (22) is fixedly mounted on the other end of the mounting base (21), and the mounting frame (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 frame (24) is fixedly mounted on the second slide rail (23), and the connecting frame (24) is located on the rear side of the mounting frame (22). One end of the third slide rail (25) is fixedly mounted on the connecting frame (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 frame (22). 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).

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 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).

5. The tensile strength testing device for air spring production according to claim 4, 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.

6. The tensile strength testing device for air spring production according to claim 5, 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.

7. The tensile strength testing device for air spring production according to claim 6, 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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