Air spring suspension durability testing device

Abstract

The present invention relates to the technical field of vehicle suspension testing, and specifically discloses an air spring suspension durability test device, which is used for vertical static, lateral dynamic and longitudinal dynamic durability tests of air spring suspensions, and includes: an upper mounting unit, including an outer cylinder and an inner push rod that are nested, and the outer cylinder is adapted to the upper piston rod of the air spring suspension; a posture adjustment unit, including a fixed plate fixed on a base and a movable plate movably arranged on the fixed plate, the fixed plate is provided with vertically intersecting lateral guide grooves and longitudinal guide grooves, and the lower end surface of the movable plate is provided with a first guide block and a second guide block; a lower mounting unit, which is used to adapt to the lower piston rod of the air spring suspension. Through the cooperation of the first guide block and the second guide block in the movable plate in different states, the degree of freedom of the movable plate relative to the fixed plate is adjusted to realize the durability test of the air spring suspension under different working condition simulation states, thereby fully reflecting the performance of the air spring suspension under actual working conditions.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle suspension testing, and more particularly to an air spring suspension durability testing device. Background Art

[0002] In order to improve the reliability and performance of air spring suspension during long-term use, it is necessary to simulate different working conditions in actual use and test the durability of air spring suspension to ensure that there will be no performance degradation or damage during long-term use.

[0003] When performing a durability test on an air spring suspension, an existing durability test device usually fixes the air spring suspension vertically on a test bench, and only uses a driving mechanism above to periodically apply a vertical downward impact to the air spring suspension, thereby testing the performance of the tubular airbag in the air spring suspension under the action of a pressure load; however, during actual use, the air spring suspension is not only subjected to static impacts in the vertical direction, but also to dynamic impacts in the lateral and longitudinal directions. The above-mentioned durability test can only simulate a single working condition in which the air spring suspension is subjected to a stable vertical impact, and the test results cannot well reflect the performance of the air spring suspension under actual working conditions. Summary of the invention

[0004] In order to overcome the above technical problems, the present invention proposes an air spring suspension durability testing device.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] An air spring suspension durability test device is used for vertical static, lateral dynamic and longitudinal dynamic durability tests of air spring suspension, comprising:

[0007] a base, on which a bracket is fixed;

[0008] A lifting platform, which is liftably arranged on a bracket, and a test driving member for driving the lifting platform is arranged on the bracket;

[0009] An upper mounting unit is arranged on the lifting platform and comprises an outer cylinder and an inner push rod arranged in a nested manner, wherein the outer cylinder is adapted to the upper piston rod of the air spring suspension;

[0010] The posture adjustment unit is arranged on the base, and includes a fixed plate fixed on the base and a movable plate movably arranged on the fixed plate, wherein the upper end surface of the fixed plate is provided with an arc-shaped recessed portion, wherein the arc-shaped recessed portion is provided with a transverse guide groove and a longitudinal guide groove intersecting vertically, and the lower end surface of the movable plate is telescopically provided with a first guide block adapted to the transverse guide groove and a second guide block adapted to the longitudinal guide groove;

[0011] The lower mounting unit is arranged on the upper end surface of the movable plate and is used to match with the lower piston rod of the air spring suspension.

[0012] As a further solution of the present invention: when the air spring suspension is subjected to a vertical static endurance test, the first guide block and the second guide block are both extended from the movable plate, the first guide block is embedded in the transverse guide groove, and the second guide block is embedded in the longitudinal guide groove. At this time, the movable plate and the fixed plate are relatively fixed, so that the air spring suspension always maintains a vertical posture;

[0013] When the air spring suspension is subjected to a lateral dynamic endurance test, only the first guide block extends from the movable plate, and the movable plate can move relative to the fixed plate in the extension direction of the lateral guide groove, so that the air spring suspension can follow the movable plate and adaptively deviate along the lateral guide groove;

[0014] When the air spring suspension is subjected to a longitudinal dynamic endurance test, only the second guide block extends from the movable plate, and the movable plate can move relative to the fixed plate in the extension direction of the longitudinal guide groove, so that the air spring suspension can follow the movable plate and adaptively deviate along the longitudinal guide groove.

[0015] As a further solution of the present invention: the test drive component includes a lifting guide rail and a driving cylinder vertically fixed on the bracket, a lifting slide slidably adapted to the lifting guide rail is provided on the lifting platform, the output end of the driving cylinder is connected to a driving shaft, and the end of the driving shaft away from the driving cylinder is fixedly connected to the lifting platform.

[0016] As a further solution of the present invention: the first guide blocks are provided in two groups and are symmetrically distributed on both sides of the longitudinal guide groove, and the first guide blocks are located directly above the transverse guide groove; the second guide blocks are provided in two groups and are symmetrically distributed on both sides of the transverse guide groove, and the second guide blocks are located directly above the longitudinal guide groove.

[0017] As a further solution of the present invention: an annular bin is arranged in the center of the movable disk, an air pump is installed on the upper end surface of the movable disk, and an air pipe is connected between the air pump and the annular bin;

[0018] The annular bin is provided with a first air cavity and a second air cavity corresponding to a first guide block and a second guide block respectively on its periphery, the first guide block is telescopically arranged in the first air cavity, and the second guide block is telescopically arranged in the second air cavity;

[0019] The first air cavity and the second air cavity are both provided with air holes communicating with the interior of the annular warehouse on one side facing the annular warehouse; and an airflow switching component is arranged in the annular warehouse.

[0020] As a further solution of the present invention: the airflow switching member comprises a sealing ring rotatably disposed in the annular bin, and the sealing ring is provided with two groups of unidirectional through holes and four groups of bidirectional through holes;

[0021] The sealing ring is marked with circumferential angles. The position of one group of one-way through holes on the sealing ring is set to 0°, and the position of the other group of one-way through holes is 180°. The positions of the four groups of two-way through holes are distributed as 45°, 135°, 225° and 315°.

[0022] As a further solution of the present invention: the lower mounting unit includes a first limit block fixed on the movable disk and a second limit block movably arranged on the movable disk, the first limit block is adapted to the two groups of connecting plates on the lower piston rod, and the second limit block is adapted to the two groups of connecting bosses on the lower piston rod;

[0023] The lower mounting unit also includes a linkage member, which includes a guide frame horizontally fixed on the movable plate and a slide plate slidably arranged in the guide frame. The second limit block is vertically fixed to one end of the slide plate. The end of the slide plate away from the second limit block is rotatably connected to a connecting rod. The end of the connecting rod away from the slide plate is provided with a sliding rod. The first limit block is provided with a sliding groove adapted to the sliding rod.

[0024] As a further solution of the present invention: the inner push rod is vertically fixed on the lifting platform, the outer tube is movably sleeved on the lower end of the inner push rod, the bottom of the outer tube is provided with an opening for accommodating the upper piston rod, a sleeve matched with the upper piston rod is provided in the opening, a universal ball is provided at the upper end of the sleeve, and a ball groove matched with the universal ball is provided in the outer tube.

[0025] As a further solution of the present invention: a cylindrical airbag abutting against the lower end of the inner push rod is arranged in the outer tube, an annular air channel is opened in the outer tube, the annular air channel is connected to the inside of the cylindrical airbag through a groove, an annular airbag is connected to the lower end opening of the annular airway, and the annular airbag is adapted to the annular groove on the upper piston rod.

[0026] As a further solution of the present invention: it also includes a reinforcement unit, which includes a telescopic cylinder fixed on the lifting platform, a lifting ring sleeve connected to the protruding end of the telescopic cylinder, and three groups of rocker arms circumferentially distributed below the lifting ring sleeve, the middle part of the rocker arm is rotatably installed on the outer wall of the outer cylinder through a rotating shaft, a clamping roller adapted to the triangular plate is installed at the lower end of the rocker arm, a supporting spring is installed between the upper end of the rocker arm and the outer cylinder, and the lifting ring sleeve is also provided with a conical surface adapted to the upper end of the rocker arm.

[0027] Beneficial effects of the present invention:

[0028] The present invention adjusts the degree of freedom of the movable disk relative to the fixed disk through the cooperation of the first guide block and the second guide block in the movable disk in different states, so as to realize the durability test of the air spring suspension under different working condition simulation states, and flexibly switch between multiple simulation states. By performing vertical static, lateral dynamic and longitudinal dynamic durability tests on the air spring suspension, the performance of the air spring suspension under actual working conditions is fully reflected; when the first guide block and the second guide block are extended at the same time, the movable disk is relatively fixed to the fixed disk, thereby realizing the vertical static durability test of the air spring suspension; when only the first guide block is extended, the movable disk can be laterally offset relative to the fixed disk, thereby realizing the lateral dynamic durability test of the air spring suspension; when only the second guide block is extended, the movable disk can be longitudinally offset relative to the fixed disk, thereby realizing the longitudinal dynamic durability test of the air spring suspension. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] Figure 1 It is a structural schematic diagram of the existing air spring suspension;

[0031] Figure 2 It is a three-dimensional schematic diagram of the present invention;

[0032] Figure 3 It is a schematic diagram of the structure of the bracket and the test drive member in the present invention;

[0033] Figure 4 It is a structural schematic diagram of the upper installation unit and the reinforcement unit in the present invention;

[0034] Figure 5 It is a structural schematic diagram of the posture adjustment unit in the present invention;

[0035] Figure 6 is a cross-sectional view of the posture adjustment unit in the present invention;

[0036] Figure 7 is a side view of the posture adjustment unit of the present invention;

[0037] Figure 8 is a top view of the posture adjustment unit in the present invention;

[0038] Fig. 9 for Figure 8 Enlarged view of point A in the middle;

[0039] Fig.10 It is a structural schematic diagram of the lower installation unit in the present invention;

[0040] Fig.11 is a cross-sectional view of the upper mounting unit and the reinforcement unit in the present invention;

[0041] Fig.12 for Fig.11 Enlarged view of point B in the middle;

[0042] Fig.13 It is a schematic diagram of the assembly of the upper mounting unit and the air spring suspension of the present invention;

[0043] Fig.14 for Fig.13 Enlarged view of center C.

[0044] In the figure:

[0045] 100, base; 110, bracket; 120, guide rod; 130, test drive member; 131, lifting guide rail; 132, lifting slide; 133, drive cylinder; 134, drive shaft;

[0046] 200, lifting platform; 210, sleeve;

[0047] 300, upper mounting unit; 310, outer cylinder; 311, annular airway; 312, notch; 313, ball groove; 320, inner ejector rod; 330, cylindrical airbag; 340, annular airbag; 350, ferrule; 360, universal ball;

[0048] 400, reinforcement unit; 410, telescopic cylinder; 420, lifting ring sleeve; 421, conical surface; 430, rotating shaft; 440, swing rod; 450, clamping roller; 460, supporting spring;

[0049] 500, attitude adjustment unit; 510, fixed plate; 511, arc-shaped recessed portion; 512, transverse guide groove; 513, longitudinal guide groove; 520, movable plate; 521, annular bin; 522, first air cavity; 523, second air cavity; 524, first guide block; 525, second guide block; 526, packing ring; 527, one-way through hole; 528, two-way through hole; 529, mounting plate; 5210, knob; 5211, air hole; 5212, air pump; 5213, air pipe;

[0050] 600, lower mounting unit; 610, guide frame; 620, slide plate; 630, connecting rod; 640, slide bar; 650, first limit block; 651, slide slot; 660, second limit block; 670, guide rod; 680, tension spring;

[0051] 700, air spring suspension; 710, tubular airbag; 720, lower piston rod; 730, upper piston rod; 731, annular groove; 740, connecting plate; 750, connecting boss; 760, triangular plate. DETAILED DESCRIPTION

[0052] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0053] See also Figure 1 The present invention discloses an air spring suspension durability test device, which is applied to the durability test of an air spring suspension 700. The air spring suspension 700 comprises a tubular airbag 710, and a lower piston rod 720 and an upper piston rod 730 are respectively provided at both ends of the tubular airbag 710; two groups of connecting plates 740 extending in the axial direction are provided on one side of the lower piston rod 720, and two groups of connecting bosses 750 extending in the radial direction are symmetrically provided on the lower piston rod 720; an annular groove 731 is provided on the upper piston rod 730, and a triangular plate 760 is provided on the periphery of the upper piston rod 730;

[0054] See also Figure 2 The air spring suspension durability test device includes a base 100, a lifting platform 200, an upper mounting unit 300, a posture adjustment unit 500 and a lower mounting unit 600; a bracket 110 is fixed on the base 100; the lifting platform 200 is escalably arranged on the bracket 110, and a test driving member 130 for driving the lifting platform 200 is also arranged on the bracket 110;

[0055] See also Figure 4 The upper mounting unit 300 is disposed on the lifting platform 200 and includes an outer cylinder 310 and an inner push rod 320 which are nested. The outer cylinder 310 is adapted to the upper piston rod 730 of the air spring suspension 700;

[0056] See also Figure 5 and Figure 6 The posture adjustment unit 500 is arranged on the base 100, and includes a fixed plate 510 fixed on the base 100 and a movable plate 520 movably arranged on the fixed plate 510, the upper end surface of the fixed plate 510 is provided with an arc-shaped recessed portion 511, and the arc-shaped recessed portion 511 is provided with a transverse guide groove 512 and a longitudinal guide groove 513 that intersect vertically, and the lower end surface of the movable plate 520 is telescopically provided with a first guide block 524 adapted to the transverse guide groove 512 and a second guide block 525 adapted to the longitudinal guide groove 513;

[0057] The lower mounting unit 600 is disposed on the upper end surface of the movable plate 520 for matching with the lower piston rod 720 of the air spring suspension 700 .

[0058] Specifically, the movable plate 520 is adjusted to the center of the fixed plate 510, and then the lower piston rod 720 of the air spring suspension 700 is adapted and installed with the lower mounting unit 600, and then the lifting platform 200 is driven downward by the test driving member 130 until the upper mounting unit 300 contacts the upper piston rod 730 of the air spring suspension 700, and the upper piston rod 730 of the air spring suspension 700 is adapted and installed with the outer cylinder 310;

[0059] When it is necessary to perform a vertical static durable impact test on the air spring suspension 700, the first guide block 524 and the second guide block 525 are extended from the movable plate 520, so that the first guide block 524 is embedded in the transverse guide groove 512, and the second guide block 525 is embedded in the longitudinal guide groove 513. Since the first guide block 524 and the second guide block 525 are respectively located in the transverse guide groove 512 and the longitudinal guide groove 513 which are perpendicular to each other, the movable plate 520 is relatively fixed to the fixed plate 510 at this time, so that the air spring suspension 700 always maintains a vertical posture, and the lifting platform 200 is driven to reciprocate up and down by the test drive member 130 to perform a vertical durable impact test on the air spring suspension 700, thereby simulating the working condition of the air spring suspension 700 being subjected to a vertical static impact load;

[0060] When it is necessary to perform a lateral dynamic endurance impact test on the air spring suspension 700, only the first guide block 524 is extended from the movable disk 520, and the second guide block 525 is retracted into the movable disk 520, so that the first guide block 524 is embedded in the lateral guide groove 512. Since the second guide block 525 is no longer connected to the longitudinal guide groove 513 at this time, the movable disk 520 can move relative to the fixed disk 510 in the extension direction of the lateral guide groove 512. When the test drive 130 performs an impact test on the air spring suspension 700, the movable disk 520 can adaptively deviate along the lateral guide groove 512, so that the air spring suspension 700 synchronously tilts laterally, thereby simulating the working condition of the air spring suspension 700 being subjected to a lateral dynamic impact load.

[0061] When it is necessary to perform a longitudinal dynamic endurance impact test on the air spring suspension 700, only the second guide block 525 is extended from the movable disk 520, and the first guide block 524 is retracted into the movable disk 520, so that the second guide block 525 is embedded in the longitudinal guide groove 513. Since the first guide block 524 is no longer connected to the transverse guide groove 512 at this time, the movable disk 520 can move relative to the fixed disk 510 in the extension direction of the longitudinal guide groove 513. When the test drive 130 performs an impact test on the air spring suspension 700, the movable disk 520 can adaptively offset along the longitudinal guide groove 513, so that the air spring suspension 700 synchronously tilts longitudinally, thereby simulating the working condition of the air spring suspension 700 being subjected to a longitudinal dynamic impact load.

[0062] It should be noted that the present invention adjusts the degree of freedom of the movable disk 520 relative to the fixed disk 510 through the coordination of different states of the first guide block 524 and the second guide block 525 in the movable disk 520, so as to realize the durability test of the air spring suspension 700 under different working condition simulation states, and flexibly switch between multiple simulation states; when the first guide block 524 and the second guide block 525 are extended at the same time, the movable disk 520 and the fixed disk 510 are relatively fixed, thereby realizing the vertical static durability test of the air spring suspension 700; when only the first guide block 524 is extended, the movable disk 520 can be laterally offset relative to the fixed disk 510, thereby realizing the lateral dynamic durability test of the air spring suspension 700; when only the second guide block 525 is extended, the movable disk 520 can be longitudinally offset relative to the fixed disk 510, thereby realizing the longitudinal dynamic durability test of the air spring suspension 700.

[0063] In one embodiment, see Figure 3 The test drive member 130 includes a lifting guide rail 131 and a driving cylinder 133 vertically fixed on the bracket 110, and a lifting slide 132 slidably adapted to the lifting guide rail 131 is provided on the lifting platform 200, and a driving shaft 134 is connected to the output end of the driving cylinder 133, and the end of the driving shaft 134 away from the driving cylinder 133 is fixedly connected to the lifting platform 200;

[0064] Specifically, during the durability test, the driving cylinder 133 drives the driving shaft 134 to reciprocate up and down, thereby driving the lifting platform 200 to reciprocate up and down along the lifting guide rail 131, and then the upper mounting unit 300 periodically presses down the air spring suspension 700 to achieve a durable impact test on the air spring suspension 700;

[0065] Furthermore, in order to improve the smoothness of the lifting process of the lifting platform 200, a guide rod 120 is vertically fixed on the base 100, and a sleeve 210 slidably connected to the guide rod 120 is provided on the lifting platform 200; the guiding effect of the guide rod 120 on the sleeve 210 can avoid deviation of the lifting platform 200 during the lifting process, thereby ensuring the consistency and smoothness of the durability test.

[0066] In yet another embodiment, see Figure 6 and Figure 7 Considering the stability of the endurance impact test under different simulation states, two groups of the first guide blocks 524 are provided and symmetrically distributed on both sides of the longitudinal guide groove 513, and the first guide blocks 524 are located directly above the transverse guide groove 512; two groups of the second guide blocks 525 are provided and symmetrically distributed on both sides of the transverse guide groove 512, and the second guide blocks 525 are located directly above the longitudinal guide groove 513;

[0067] When the first guide block 524 and the second guide block 525 are extended at the same time, the movable disk 520 can be locked in the central position, and the movable disk 520 can neither move along the transverse guide groove 512 nor move along the longitudinal guide groove 513. When one of the first guide block 524 and the second guide block 525 is extended, the movable disk 520 can only move along the transverse guide groove 512 or the longitudinal guide groove 513, thereby ensuring the stability of the posture switching of the movable disk 520.

[0068] It should be noted that the bending radius of the transverse guide groove 512 and the longitudinal guide groove 513 is set according to the overall length of the air spring suspension 700. That is to say, when the movable plate 520 is offset relative to the transverse guide groove 512 or the longitudinal guide groove 513, the air spring suspension 700 as a whole also rotates relative to the end of the upper piston rod 730 as a fulcrum, thereby simulating the working conditions of different tilt states encountered by the air spring suspension 700 during actual use; since the upper end of the air spring suspension 700 is connected to the upper mounting unit 300 and the lower end is connected to the lower mounting unit 600, during the deflection process, the air spring suspension 700 will not be separated from the entire test device.

[0069] See also Figure 6 , Figure 8 and Fig. 9 , with respect to the telescopic driving mode of the first guide block 524 and the second guide block 525, an annular bin 521 is arranged at the center of the movable disk 520, an air pump 5212 is installed on the upper end surface of the movable disk 520, and an air pipe 5213 is connected between the air pump 5212 and the annular bin 521; the first air cavity 522 and the second air cavity 523 corresponding to the first guide block 524 and the second guide block 525 are respectively arranged on the periphery of the annular bin 521, the first guide block 524 is telescopically arranged in the first air cavity 522, and the second guide block 525 is telescopically arranged in the second air cavity 523; the first air cavity 522 and the second air cavity 523 are both provided with air holes 5211 connected with the inside of the annular bin 521 on one side facing the annular bin 521; an air flow switching member is arranged in the annular bin 521;

[0070] Specifically, in the initial state, the first guide block 524 and the second guide block 525 are always retracted into the movable disk 520;

[0071] During the vertical static endurance test, the first guide block 524 and the second guide block 525 need to be extended at the same time. At this time, the airflow direction in the annular bin 521 is adjusted by the airflow switching member, so that the air holes 5211 on the first air cavity 522 and the second air cavity 523 are connected to the inside of the annular bin 521 at the same time. The air pump 5212 blows air into the annular bin 521 through the air pipe 5213, and the air enters the first air cavity 522 and the second air cavity 523 through the air holes 5211, thereby increasing the air pressure in the first air cavity 522 and the second air cavity 523, so as to push the first guide block 524 and the second guide block 525 outward.

[0072] During the lateral dynamic endurance test, only the first guide block 524 needs to be extended. At this time, the airflow direction in the annular chamber 521 is adjusted by the airflow switching member, so that only the air hole 5211 on the first air cavity 522 is connected to the inside of the annular chamber 521, and the air hole 5211 on the second air cavity 523 is blocked. The air pump 5212 is used to blow air into the annular chamber 521 through the air pipe 5213, and the air enters the first air cavity 522 through the corresponding air hole 5211, thereby increasing the air pressure in the first air cavity 522 to push the first guide block 524 outward.

[0073] During the longitudinal dynamic endurance test, only the second guide block 525 needs to be extended. At this time, the airflow direction in the annular warehouse 521 is adjusted by the airflow switching member, so that only the air hole 5211 on the second air cavity 523 is connected to the inside of the annular warehouse 521, and the air hole 5211 on the first air cavity 522 is blocked. Air is blown into the annular warehouse 521 through the air pipe 5213 by the air pump 5212, and the gas enters the second air cavity 523 through the corresponding air hole 5211, thereby increasing the air pressure in the second air cavity 523 to push the second guide block 525 outward.

[0074] For further information, see Fig. 9 The airflow switching member includes a sealing ring 526 rotatably disposed in the annular chamber 521, and the sealing ring 526 is provided with two groups of one-way through holes 527 and four groups of two-way through holes 528; the sealing ring 526 is marked with circumferential angles, and the position of one group of one-way through holes 527 on the sealing ring 526 is set to 0°, and the position of the other group of one-way through holes 527 is 180°, and the positions of the four groups of two-way through holes 528 are distributed at 45°, 135°, 225° and 315°;

[0075] Specifically, during the vertical static endurance test, the sealing ring 526 is rotated to make the four groups of bidirectional through holes 528 communicate with the four groups of air holes 5211 respectively, so that each group of the first air cavity 522 and the second air cavity 523 can be communicated with the annular chamber 521, thereby causing the first guide block 524 and the second guide block 525 to extend synchronously;

[0076] During the lateral dynamic endurance test, the sealing ring 526 is rotated so that the two groups of one-way through holes 527 are connected to the two groups of first air cavities 522 respectively. At this time, the four groups of two-way through holes 528 are not connected to any air hole 5211, so that only the first guide block 524 is extended;

[0077] During the longitudinal dynamic endurance test, the sealing ring 526 is rotated to connect the two groups of one-way through holes 527 with the two groups of second air cavities 523 respectively. At this time, the four groups of two-way through holes 528 are not connected with any air hole 5211, so that only the second guide block 525 is extended.

[0078] In addition, in order to facilitate the angle adjustment of the sealing ring 526, a mounting plate 529 is fixed on the sealing ring 526, and a knob 5210 extending out of the annular bin 521 is installed in the middle of the mounting plate 529; by rotating the knob 5210, the sealing ring 526 can be driven to rotate relative to the annular bin 521 to achieve adjustment of different airflow directions.

[0079] In further embodiments, see Fig.10 Considering the stability of the connection between the lower mounting unit 600 and the lower piston rod 720 of the air spring suspension 700, the lower mounting unit 600 includes a first limit block 650 fixed on the movable disk 520 and a second limit block 660 movably arranged on the movable disk 520, wherein the first limit block 650 is adapted to the two groups of connecting plates 740 on the lower piston rod 720, and the second limit block 660 is adapted to the two groups of connecting bosses 750 on the lower piston rod 720; the lower mounting unit 600 also includes a linkage member, which is used to trigger the second limit block 660 to abut against the corresponding connecting boss 750 when the first limit block 650 is axially inserted into the gap between the two groups of connecting plates 740;

[0080] Specifically, when the lower piston rod 720 of the air spring suspension 700 is adapted and installed with the lower mounting unit 600, the gap between the two sets of connecting plates 740 is aligned with the first limit block 650 in the vertical direction, and the air spring suspension 700 is pushed downward so that the first limit block 650 is gradually inserted into the gap between the two sets of connecting plates 740 and fits the outer wall of the lower piston rod 720. Under the action of the linkage, the second limit block 660 also gradually approaches the connecting boss 750 laterally until the second limit block 660 and the The first limit block 650 and the second limit block 660 are in contact with the corresponding connecting boss 750, and the lower piston rod 720 of the air spring suspension 700 can be fixed by means of the first limit block 650 and the second limit block 660, while ensuring that the lower piston rod 720 will not rotate relative to the movable disk 520, thereby ensuring that the air spring suspension 700 is vertically fixed on the movable disk 520 as a whole, avoiding relative deflection or shaking between the air spring suspension 700 and the movable disk 520 during the durability test, thereby improving the stability of the durability test and the accuracy of the test results.

[0081] For further information, see Fig.10 The linkage member includes a guide frame 610 horizontally fixed on the movable plate 520 and a slide plate 620 slidably arranged in the guide frame 610, the second limit block 660 is vertically fixed to one end of the slide plate 620, the end of the slide plate 620 away from the second limit block 660 is rotatably connected to a connecting rod 630, the end of the connecting rod 630 away from the slide plate 620 is provided with a sliding rod 640, and the first limit block 650 is provided with a sliding groove 651 adapted to the sliding rod 640;

[0082] Specifically, when the lower piston rod 720 of the air spring suspension 700 is placed vertically on the movable disk 520, when the first limit block 650 is inserted into the gap between the two sets of connecting plates 740, the connecting plate 740 presses down the slide bar 640, so that the slide bar 640 moves downward along the slide groove 651. Driven by the connecting rod 630, the slide plate 620 slides to one side along the guide frame 610, thereby driving the second limit block 660 on the slide plate 620 to approach the connecting boss 750 until the second limit block 660 presses the connecting boss 750 to fix the air spring suspension 700.

[0083] It should be noted that since the test drive 130 will periodically apply a downward impact force to the air spring suspension 700, each time the air spring suspension 700 is impacted, it can synchronously apply a downward thrust to the slide rod 640, thereby ensuring that the second limit block 660 can press the connecting boss 750 during the impact process, thereby effectively preventing the lower piston rod 720 from deflecting or shaking.

[0084] Also, see Fig.10 A guide rod 670 is fixed inside the guide frame 610, and the slide plate 620 is slidably sleeved on the guide rod 670. A tension spring 680 is connected between the end of the guide frame 610 away from the connecting rod 630 and the slide plate 620, and the tension spring 680 is sleeved on the guide rod 670;

[0085] When the air spring suspension 700 needs to be removed from the movable disk 520 , the slide plate 620 slides back to its original position under the tension of the tension spring 680 , thereby automatically separating the second limit block 660 from the connecting boss 750 , facilitating the disassembly and assembly of the air spring suspension 700 .

[0086] In one embodiment, see Fig.11 and Fig.12, with respect to the connection mode between the upper piston rod 730 of the air spring suspension 700 and the upper mounting unit 300, the inner push rod 320 is vertically fixed on the lifting platform 200, the outer cylinder 310 is movably sleeved on the lower end of the inner push rod 320, the bottom of the outer cylinder 310 is provided with an opening for accommodating the upper piston rod 730, the opening is provided with a ferrule 350 adapted to the upper piston rod 730, the upper end of the ferrule 350 is provided with a universal ball 360, and the outer cylinder 310 is provided with a ball groove 313 adapted to the universal ball 360;

[0087] Specifically, the end of the upper piston rod 730 of the air spring suspension 700 is inserted into the sleeve 350 to achieve the connection between the upper piston rod 730 and the upper mounting unit 300. Since the universal ball 360 can rotate at any angle in the ball groove 313, the upper piston rod 730 of the air spring suspension 700 can be adaptively deflected relative to the outer tube 310 during lateral or longitudinal dynamic testing.

[0088] For further information, see Fig.12 In order to improve the stability of the connection between the upper piston rod 730 of the air spring suspension 700 and the outer tube 310, a cylindrical airbag 330 is arranged in the outer tube 310 to abut against the lower end of the inner push rod 320, and an annular air channel 311 is opened in the outer tube 310. The annular air channel 311 is connected to the inside of the cylindrical airbag 330 through a notch 312. The lower end opening of the annular air channel 311 is connected to an annular airbag 340, and the annular airbag 340 is adapted to the annular groove 731 on the upper piston rod 730;

[0089] See also Fig.13 and Fig.14 When the lifting platform 200 moves downward, the outer cylinder 310 slides upward along the inner push rod 320, thereby squeezing the cylindrical airbag 330. The gas in the cylindrical airbag 330 enters the annular airway 311 through the notch 312, increasing the air pressure in the annular airway 311, thereby causing the annular airbag 340 to expand radially and embed into the annular groove 731 on the upper piston rod 730, so as to further wrap and fix the upper piston rod 730, improve the connection stability with the upper piston rod 730, and prevent the upper piston rod 730 from being accidentally bumped and scratched.

[0090] Considering the vertical static endurance test, it is necessary to ensure that the air spring suspension 700 remains vertical as a whole. For this purpose, please refer to Fig.11 and Fig.13, further comprising a reinforcement unit 400, the reinforcement unit 400 comprising a telescopic cylinder 410 fixed on the lifting platform 200, a lifting ring sleeve 420 connected to the protruding end of the telescopic cylinder 410, and three sets of swing rods 440 circumferentially distributed below the lifting ring sleeve 420, the middle part of the swing rod 440 is rotatably mounted on the outer wall of the outer cylinder 310 through a rotating shaft 430, a clamping roller 450 adapted to the triangular plate 760 is mounted at the lower end of the swing rod 440, a supporting spring 460 is mounted between the upper end of the swing rod 440 and the outer cylinder 310, and the lifting ring sleeve 420 is also provided with a conical surface 421 adapted to the upper end of the swing rod 440;

[0091] When performing the vertical static durability test, the telescopic cylinder 410 drives the lifting ring 420 to rise. At this time, the lifting ring 420 does not contact the swing rod 440, and the upper end of the swing rod 440 is stretched outward under the elastic force of the supporting spring 460, so that the clamping roller 450 at the lower end of the swing rod 440 contacts the corresponding edge of the triangle plate 760 and clamps the triangle plate 760, thereby further improving the clamping and fixing effect of the entire air spring suspension 700;

[0092] When conducting a lateral or longitudinal dynamic endurance test, the lifting ring sleeve 420 is driven downward by the telescopic cylinder 410, and the conical surface 421 is used to squeeze the upper end of the rocker arm 440, so that the upper end of the rocker arm 440 swings radially inward and compresses the support spring 460. At the same time, the lower end of the rocker arm 440 swings radially outward, so that the clamping roller 450 is separated from the triangle plate 760. At this time, the clamping roller 450 no longer clamps and limits the triangle plate 760, and the air spring suspension 700 can perform dynamic deflection.

[0093] The specific implementation methods of this embodiment are described above, but this embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Ordinary technicians in this field can also make many forms inspired by this embodiment, all of which are within the protection of this embodiment.

Claims

1. An air spring suspension durability test device, characterized in that: Vertical static, lateral dynamic and longitudinal dynamic endurance tests for air spring suspension (700), including: A base (100) on which a bracket (110) is fixed; A lifting platform (200) is liftably arranged on a support (110), wherein a test driving member (130) for driving the lifting platform (200) is arranged on the support (110); An upper mounting unit (300) is arranged on the lifting platform (200), comprising an outer cylinder (310) and an inner push rod (320) which are nested, wherein the outer cylinder (310) is adapted to an upper piston rod (730) of an air spring suspension (700); A posture adjustment unit (500) is arranged on a base (100), comprising a fixed plate (510) fixed on the base (100) and a movable plate (520) movably arranged on the fixed plate (510), wherein the upper end surface of the fixed plate (510) is provided with an arc-shaped recessed portion (511), wherein the arc-shaped recessed portion (511) is provided with a transverse guide groove (512) and a longitudinal guide groove (513) intersecting vertically, and the lower end surface of the movable plate (520) is telescopically provided with a first guide block (524) adapted to the transverse guide groove (512) and a second guide block (525) adapted to the longitudinal guide groove (513); The lower mounting unit (600) is arranged on the upper end surface of the movable plate (520) and is used to match the lower piston rod (720) of the air spring suspension (700).

2. The air spring suspension durability testing device according to claim 1, characterized in that: When the air spring suspension (700) is subjected to a vertical static endurance test, the first guide block (524) and the second guide block (525) are both extended from the movable plate (520), the first guide block (524) is embedded in the transverse guide groove (512), and the second guide block (525) is embedded in the longitudinal guide groove (513). At this time, the movable plate (520) and the fixed plate (510) are relatively fixed, so that the air spring suspension (700) always maintains a vertical posture; When the air spring suspension (700) is subjected to a lateral dynamic durability test, only the first guide block (524) extends from the movable plate (520), and the movable plate (520) is able to move relative to the fixed plate (510) in the extension direction of the lateral guide groove (512), so that the air spring suspension (700) can follow the movable plate (520) and adaptively deviate along the lateral guide groove (512); When the air spring suspension (700) is subjected to a longitudinal dynamic endurance test, only the second guide block (525) extends from the movable plate (520), and the movable plate (520) is able to move relative to the fixed plate (510) in the extension direction of the longitudinal guide groove (513), so that the air spring suspension (700) can follow the movable plate (520) and adaptively deviate along the longitudinal guide groove (513).

3. The air spring suspension durability testing device according to claim 1, characterized in that: The test drive member (130) comprises a lifting guide rail (131) and a driving cylinder (133) vertically fixed on the bracket (110); a lifting slide (132) slidably adapted to the lifting guide rail (131) is provided on the lifting platform (200); a driving shaft (134) is connected to the output end of the driving cylinder (133); and an end of the driving shaft (134) away from the driving cylinder (133) is fixedly connected to the lifting platform (200).

4. The air spring suspension durability testing device according to claim 2, characterized in that: The first guide blocks (524) are provided in two groups and are symmetrically distributed on both sides of the longitudinal guide groove (513), and the first guide blocks (524) are located directly above the transverse guide groove (512); the second guide blocks (525) are provided in two groups and are symmetrically distributed on both sides of the transverse guide groove (512), and the second guide blocks (525) are located directly above the longitudinal guide groove (513).

5. The air spring suspension durability testing device according to claim 4, characterized in that: An annular bin (521) is provided at the center of the movable disk (520), an air pump (5212) is installed on the upper end surface of the movable disk (520), and an air pipe (5213) is connected between the air pump (5212) and the annular bin (521); The annular bin (521) is provided with a first air cavity (522) and a second air cavity (523) corresponding to a first guide block (524) and a second guide block (525), respectively; the first guide block (524) is telescopically disposed in the first air cavity (522); and the second guide block (525) is telescopically disposed in the second air cavity (523); The first air cavity (522) and the second air cavity (523) are both provided with air holes (5211) on the side facing the annular bin (521) and communicating with the interior of the annular bin (521); an airflow switching element is provided in the annular bin (521).

6. The air spring suspension durability testing device according to claim 5, characterized in that: The airflow switching member comprises a sealing ring (526) rotatably disposed in the annular bin (521), and the sealing ring (526) is provided with two groups of unidirectional through holes (527) and four groups of bidirectional through holes (528); The sealing ring (526) is marked with circumferential angles. The position of one group of one-way through holes (527) on the sealing ring (526) is set to 0°, and the position of the other group of one-way through holes (527) is 180°. The positions of the four groups of two-way through holes (528) are distributed at 45°, 135°, 225° and 315°.

7. The air spring suspension durability testing device according to claim 2, characterized in that: The lower mounting unit (600) comprises a first limit block (650) fixed on the movable disk (520) and a second limit block (660) movably arranged on the movable disk (520), wherein the first limit block (650) is adapted to two groups of connecting plates (740) on the lower piston rod (720), and the second limit block (660) is adapted to two groups of connecting bosses (750) on the lower piston rod (720); The lower mounting unit (600) further comprises a linkage member, which comprises a guide frame (610) horizontally fixed on the movable plate (520) and a slide plate (620) slidably arranged in the guide frame (610); the second limit block (660) is vertically fixed to one end of the slide plate (620); the end of the slide plate (620) away from the second limit block (660) is rotatably connected to a connecting rod (630); the end of the connecting rod (630) away from the slide plate (620) is provided with a sliding rod (640); and a sliding groove (651) adapted to the sliding rod (640) is provided in the first limit block (650).

8. The air spring suspension durability testing device according to claim 1, characterized in that: The inner push rod (320) is vertically fixed on the lifting platform (200); the outer cylinder (310) is movably sleeved on the lower end of the inner push rod (320); an opening for accommodating an upper piston rod (730) is provided at the bottom of the outer cylinder (310); a sleeve (350) adapted to the upper piston rod (730) is provided in the opening; a universal ball (360) is provided at the upper end of the sleeve (350); and a ball groove (313) adapted to the universal ball (360) is provided in the outer cylinder (310).

9. The air spring suspension durability testing device according to claim 8, characterized in that: The outer tube (310) is provided with a cylindrical airbag (330) abutting against the lower end of the inner push rod (320), and the outer tube (310) is provided with an annular air passage (311), the annular air passage (311) is communicated with the inside of the cylindrical airbag (330) via a notch (312), and an annular airbag (340) is connected to the lower opening of the annular air passage (311), and the annular airbag (340) is adapted to the annular groove (731) on the upper piston rod (730).

10. The air spring suspension durability testing device according to claim 9, characterized in that: The invention also comprises a reinforcement unit (400), wherein the reinforcement unit (400) comprises a telescopic cylinder (410) fixed on the lifting platform (200), a lifting ring sleeve (420) connected to the protruding end of the telescopic cylinder (410), and three groups of swing rods (440) circumferentially distributed below the lifting ring sleeve (420), wherein the middle part of the swing rod (440) is rotatably mounted on the outer wall of the outer cylinder (310) via a rotating shaft (430), a clamping roller (450) adapted to the triangular plate (760) is mounted on the lower end of the swing rod (440), a supporting spring (460) is mounted between the upper end of the swing rod (440) and the outer cylinder (310), and the lifting ring sleeve (420) is also provided with a conical surface (421) adapted to the upper end of the swing rod (440).

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