Air spring fatigue testing device

Abstract

The application provides an air spring fatigue test device, which is characterized in that: a support frame and a support base are arranged on a bearing table, a longitudinal swing arm assembly, a transverse swing arm assembly and a rotary swing arm assembly are arranged between the support frame and the support base, a damper of the air spring is connected with a connecting arm, an upper top base of the air spring is connected with a connecting base on the support base, a first linear driving mechanism drives the longitudinal swing arm assembly to perform longitudinal reciprocating motion through a connecting rod mechanism, and a second linear driving mechanism drives the transverse swing arm assembly to perform transverse reciprocating motion, so that axial repeated compression loading test, radial repeated folding loading test and circumferential repeated torsion loading test of the air spring can be simultaneously realized, the durability fatigue test of the air spring can be simulated in the actual use environment of the automobile, and the accuracy and reliability of the durability fatigue test of the air spring are effectively improved. In addition, the air spring fatigue test device has simple and compact structure and ingenious and reasonable layout.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of vehicle accessory testing, in particular, relates to an air spring fatigue testing device. BACKGROUND

[0002] The air spring is a part of the vehicle suspension system, which mainly functions to support the vehicle body and provide shock absorption to the vehicle body, thereby improving the comfort of the ride. The air spring fatigue testing machine generally places the air spring on the test bench and repeatedly stretches and compresses the air spring to achieve the purpose of fatigue testing. At present, most air spring fatigue testing machines not only have the defect of complex structure, but also can only repeatedly stretch and compress the air spring in the axial direction from top to bottom or from bottom to top, and cannot repeatedly fold the air spring in the radial direction, which cannot truly simulate the actual use environment of the automobile, and thus cannot accurately and reliably test the durability of the air spring. SUMMARY

[0003] Based on the above problems existing in the prior art, the purpose of the embodiments of the present application is to provide an air spring fatigue testing device to solve the problems of the air spring fatigue testing machine in the prior art, which not only has a complex structure, but also cannot truly simulate the actual use environment of the automobile to test the durability of the air spring, thereby affecting the accuracy and reliability of the test.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present application is to provide an air spring fatigue testing device, comprising:

[0005] a bearing table;

[0006] a support frame arranged on the bearing table;

[0007] a support seat arranged on the bearing table adjacent to the support frame;

[0008] a first linear drive mechanism arranged on the support frame;

[0009] a second linear drive mechanism arranged on the support seat;

[0010] a longitudinal swing arm assembly for driving the air spring to repeatedly stretch and compress in the axial direction, the top end of the longitudinal swing arm assembly being hinged to the support seat;

[0011] a transverse swing arm assembly for driving the air spring to repeatedly fold in the radial direction, the transverse swing arm assembly being connected to the bottom end of the longitudinal swing arm assembly, the support seat and the power output end of the second linear drive mechanism, respectively;

[0012] A connecting rod mechanism includes a first connecting rod arranged vertically and a second connecting rod rotatably connected to the first connecting rod, the first connecting rod is fixedly connected to the power output end of the first linear driving mechanism, and the second connecting rod is connected to the longitudinal swing arm assembly;

[0013] A rotary swing arm assembly is used to drive the air spring to repeatedly twist and load in the circumferential direction, the rotary swing arm assembly is rotatably connected to the bottom end of the longitudinal swing arm assembly, and the rotary swing arm assembly is hingedly connected to the support base;

[0014] A connecting arm is used to be connected to the shock absorber of the air spring, one end of the connecting arm away from the shock absorber is rotatably connected to the movable joint of the rotary swing arm assembly; and

[0015] A connecting seat is used to be connected to the upper top seat of the air spring, and the connecting seat is connected to the support base.

[0016] Further, the transverse swing arm assembly includes a driven arm arranged transversely and a driving arm arranged transversely, the first end of the driven arm is rotatably connected to the bottom end of the longitudinal swing arm assembly, the second end of the driven arm is rotatably connected to the support base, the first end of the driving arm is rotatably connected to the bottom end of the longitudinal swing arm assembly, and the second end of the driving arm is connected to the power output end of the second linear driving mechanism.

[0017] Further, the longitudinal swing arm assembly includes an S-shaped longitudinal curved arm and a C-shaped fork arm hingedly connected to the top end of the longitudinal curved arm, the first end of the C-shaped fork arm is hingedly connected to the support base through a first hinge assembly, the second end of the C-shaped fork arm is hingedly connected to the support base through a second hinge assembly, and one end of the rotary swing arm assembly is rotatably connected to the bottom end of the longitudinal curved arm.

[0018] Further, the rotary swing arm assembly includes a first rotary arm and a second rotary arm rotatably connected to the first rotary arm, the rotary connection between the first rotary arm and the second rotary arm forms a movable joint, one end of the first rotary arm away from the movable joint is rotatably connected to the bottom end of the longitudinal swing arm assembly, and one end of the second rotary arm away from the movable joint is hingedly connected to the support base.

[0019] Further, the connecting arm is arranged in a vertical state, the bottom end of the connecting arm is rotatably connected to the rotating shaft at the movable joint of the rotary swing arm assembly through a bearing, and the top end of the connecting arm is provided with a positioning sleeve for sleeving on the shock absorber.

[0020] Further, the connecting seat includes a first seat body fixedly connected to the connecting seat and a second seat body rotatably connected to the first seat body, and the second seat body is provided with a positioning tool for positioning the upper top seat.

[0021] Further, the first linear driving mechanism is a pneumatic cylinder, the first linear driving mechanism is an electric cylinder, a piston rod of the pneumatic cylinder and a telescopic rod of the electric cylinder respectively constitute a power output end, the piston rod of the pneumatic cylinder is arranged in a vertical direction, and the telescopic rod of the electric cylinder is arranged in a horizontal direction.

[0022] Further, the air spring fatigue testing device further comprises a cold and warm box for simulating different temperature environments and a temperature adjusting system arranged in the cold and warm box.

[0023] Further, the air spring fatigue testing device further comprises a pressure sensor for detecting force of the power output end of the first linear driving mechanism on the longitudinal swing arm assembly and a controller for controlling operation of the first linear driving mechanism according to a pressure signal detected by the pressure sensor, the controller being electrically connected with the pressure sensor and the first linear driving mechanism respectively.

[0024] Further, the support seat comprises a support plate arranged perpendicularly to a table top of the bearing table and a seat body for supporting and fixing the support plate on the bearing table, the seat body being fixedly connected with the bearing table, and two ends of the C-shaped fork arm of the longitudinal swing arm assembly, the transverse swing arm assembly and the rotary swing arm assembly being respectively hinged to one side of the support plate facing the support frame.

[0025] Compared with the prior art, the one or more technical solutions in the embodiments of the present application have at least one of the following beneficial effects:

[0026] The air spring fatigue test device in the embodiment of the present application, through setting the support frame and the support seat on the bearing table, suspending the longitudinal swing arm assembly, the transverse swing arm assembly and the rotary swing arm assembly between the support frame and the support seat, connecting the longitudinal swing arm assembly and the power output end of the first linear driving mechanism through the connecting rod mechanism, connecting the transverse swing arm assembly and the power output end of the first linear driving mechanism, and connecting the transverse swing arm assembly and the bottom end of the longitudinal swing arm assembly and the support seat, connecting the rotary swing arm assembly and the bottom end of the longitudinal swing arm assembly, connecting the connecting arm and the rotary swing arm assembly, connecting the shock absorber of the air spring and the connecting arm, connecting the upper top seat of the air spring and the connecting seat on the support seat, driving the longitudinal swing arm assembly to move longitudinally through the connecting rod mechanism by the first linear driving mechanism, driving the transverse swing arm assembly to move transversely by the second linear driving mechanism, the axial repeated compression loading test, the radial repeated folding loading test and the circumferential repeated torsion loading test of the air spring can be realized synchronously, so that the durability fatigue test of the air spring can be simulated in the actual use environment of the automobile, and the accuracy and reliability of the durability fatigue test of the air spring are effectively improved. Moreover, the air spring fatigue test device provided by the embodiment of the present application has simple and compact structure, and the layout is ingenious and reasonable, which can ensure the tensile and compressive strength of the test workpiece, and can keep the test workpiece balanced in the axial, radial and circumferential three-way loading, so that the durability fatigue test of the air spring is more accurate. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0028] Figure 1 The three-dimensional structure schematic diagram of the air spring fatigue test device provided by the embodiment of the present application;

[0029] Figure 2 The three-dimensional structure schematic diagram of the air spring fatigue test device provided by the embodiment of the present application; Figure 1 The structure schematic diagram of the air spring fatigue test device provided by the embodiment of the present application;

[0030] Figure 3 The three-dimensional structure schematic diagram of the air spring fatigue test device provided by the embodiment of the present application;

[0031] Figure 4 The three-dimensional structure schematic diagram of the air spring fatigue test device provided by the embodiment of the present application; Figure 3 The structure schematic diagram of the air spring fatigue test device provided by the embodiment of the present application;

[0032] Figure 5An assembly view of the longitudinal swing arm assembly, the transverse swing arm assembly and the rotary swing arm assembly provided by the embodiment of the present application;

[0033] Figure 6 Another assembly view of the longitudinal swing arm assembly, the transverse swing arm assembly and the rotary swing arm assembly provided by the embodiment of the present application;

[0034] Figure 7 An assembly view of the longitudinal swing arm assembly and the transverse swing arm assembly provided by the embodiment of the present application;

[0035] Figure 8 An exploded view of the air spring fatigue testing device provided by the embodiment of the present application.

[0036] In the drawings, various reference numerals refer to:

[0037] 1 - bearing table; 2 - support frame;

[0038] 3 - support seat; 31 - support plate; 32 - third seat body;

[0039] 4 - first linear drive mechanism; 41 - piston rod;

[0040] 5 - second linear drive mechanism; 51 - telescopic rod;

[0041] 6 - longitudinal swing arm assembly; 61 - longitudinal curved arm; 62 - C-shaped fork arm; 621 - first bearing sleeve; 622 - second bearing sleeve;

[0042] 7 - transverse swing arm assembly; 71 - driving arm; 72 - driven arm;

[0043] 8 - connecting rod mechanism; 81 - first connecting rod; 82 - second connecting rod;

[0044] 9 - rotary swing arm assembly; 91 - first rotary arm; 92 - second rotary arm;

[0045] 10 - connecting arm; 101 - positioning sleeve;

[0046] 20 - connecting seat; 201 - first seat body; 202 - second seat body; 203 - positioning tool

[0047] 30 - air spring; 301 - shock absorber; 302 - upper top seat;

[0048] 40 - first hinged assembly; 401 - first fixed seat; 402 - first hinged seat;

[0049] 50 - second hinged assembly; 501 - second fixed seat; 502 - second hinged seat;

[0050] 60 - third hinged assembly; 601 - third fixed seat; 602 - third hinged seat;

[0051] 70 - pressure sensor; 80 - first ball bearing; 90 - second ball bearing; 100 - cooler. DETAILED DESCRIPTION

[0052] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0053] It should be noted that when an element is referred to as being "connected to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0054] In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", "third" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified. The meaning of "a plurality of" is one or more, unless otherwise explicitly specified.

[0055] In the description of the present application, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and cannot be understood as indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0056] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0057] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. Thus, the appearances of the phrase "in one embodiment" or "in some embodiments" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0058] Please refer to Figures 1 to 8 , now the air spring fatigue test device provided by the embodiment of the application will be described. Please further refer to Figure 1 、 Figure 2 and Figure 3 , the air spring fatigue test device provided by the embodiment of the application comprises a bearing table 1, a support frame 2, a support seat 3, a first linear drive mechanism 4, a second linear drive mechanism 5, a longitudinal swing arm assembly 6, a transverse swing arm assembly 7, a connecting rod mechanism 8, a rotary swing arm assembly 9, a connecting arm 10 and a connecting seat 20, the support frame 2 is fixedly arranged on the bearing table 1, the support seat 3 is fixedly arranged on the bearing table 1 at a position close to the support frame 2, the first linear drive mechanism 4 is arranged on the support frame 2, and the second linear drive mechanism 5 is arranged on the support seat 3. The longitudinal swing arm assembly 6 is used to drive the air spring 30 to be repeatedly stretched and compressed in the axial direction for loading test, the transverse swing arm assembly 7 is used to drive the air spring 30 to be repeatedly folded in the radial direction for loading test, the rotary swing arm assembly 9 is used to drive the air spring 30 to be repeatedly twisted in the circumferential direction for loading test, and the connecting rod mechanism 8 is used to movably connect the longitudinal swing arm assembly 6 and the power output end of the first linear drive mechanism 4. The connecting rod mechanism 8 comprises a first connecting rod 81 arranged vertically and a second connecting rod 82 rotatably connected with the first connecting rod 81, the first connecting rod 81 is fixedly connected with the power output end of the first linear drive mechanism 4, the second connecting rod 82 is connected with the longitudinal swing arm assembly 6, the top end of the longitudinal swing arm assembly 6 is hingedly connected with the support seat 3, the transverse swing arm assembly 7 is connected with the bottom end of the longitudinal swing arm assembly 6, the support seat 3 and the power output end of the second linear drive mechanism 5 respectively, the rotary swing arm assembly 9 is rotatably connected with the bottom end of the longitudinal swing arm assembly 6, and the rotary swing arm assembly 9 is hingedly connected with the support seat 3. The connecting arm 10 is used to be connected with the shock absorber 301 of the air spring 30, and the end, away from the shock absorber 301, of the connecting arm 10 is rotatably connected with the movable joint of the rotary swing arm assembly 9. The connecting seat 20 is used to be connected with the upper top seat 302 of the air spring 30, and the connecting seat 20 is connected with the support seat 3. Please further refer to Figure 3 、 Figure 4 and Figure 5In the fatigue test of the air spring 30 by the air spring fatigue test device provided by the embodiment of the application, only the damper 301 of the air spring 30 is connected with the connecting arm 10, and the upper top seat 302 of the air spring 30 is connected with the connecting seat 20, the first linear driving mechanism 4 and the second linear driving mechanism 5 are controlled to work by the controller, the first linear driving mechanism 4 drives the longitudinal swing arm assembly 6 to perform longitudinal (approximately along the axial direction of the air spring 30) reciprocating motion through the connecting rod mechanism 8, and the second linear driving mechanism 5 drives the transverse swing arm assembly 7 to perform transverse (approximately along the radial direction of the air spring 30) reciprocating motion, since the transverse swing arm assembly 7 is rotatably connected with the bottom end of the longitudinal swing arm assembly 6 and the support seat 3, and the rotary swing arm assembly 9 is rotatably connected with the bottom end of the longitudinal swing arm assembly 6 and hinged with the support seat 3, and the end of the connecting arm 10 away from the damper 301 is rotatably connected with the movable joint of the rotary swing arm assembly 9, the axial repeated compression loading test, the radial repeated folding loading test and the circumferential repeated torsion loading test of the air spring 30 can be simultaneously realized, so that the durability fatigue test of the air spring 30 can be simulated in the actual use environment of the automobile, and the accuracy and reliability of the durability fatigue test of the air spring 30 are effectively improved. In addition, the air spring fatigue test device provided by the embodiment of the application has simple structure, can ensure the tensile and compressive strength of the test workpiece, and can keep the test workpiece balanced in the axial, radial and circumferential three-way loading, so that the durability fatigue test of the air spring 30 is more accurate.

[0059] Compared with the prior art, the air spring fatigue test device provided by the embodiment of the present application has the support frame 2 and the support seat 3 arranged on the bearing table 1, the longitudinal swing arm assembly 6, the transverse swing arm assembly 7 and the rotary swing arm assembly 9 are arranged in suspension between the support frame 2 and the support seat 3, the longitudinal swing arm assembly 6 is movably connected with the power output end of the first linear driving mechanism 4 through the connecting rod mechanism 8, the transverse swing arm assembly 7 is connected with the power output end of the first linear driving mechanism 4, and the transverse swing arm assembly 7 is rotatably connected with the bottom end of the longitudinal swing arm assembly 6 and the support seat 3, respectively, the rotary swing arm assembly 9 is rotatably connected with the bottom end of the longitudinal swing arm assembly 6, and the rotary swing arm assembly 9 is hingedly connected with the support seat 3, the connecting arm 10 is rotatably connected with the movable joint of the rotary swing arm assembly 9, the shock absorber 301 of the air spring 30 is connected with the connecting arm 10, and the upper top seat 302 of the air spring 30 is connected with the connecting seat 20 on the support seat 3, the first linear driving mechanism 4 drives the longitudinal swing arm assembly 6 to move longitudinally through the connecting rod mechanism 8, and the transverse swing arm assembly 7 moves transversely driven by the second linear driving mechanism 5, so that the air spring 30 can be simultaneously subjected to axial repeated compression loading test, radial repeated folding loading test and circumferential repeated torsion loading test, thereby the durability fatigue test of the air spring 30 can be simulated in the actual use environment of the automobile, and the accuracy and reliability of the durability fatigue test of the air spring 30 are effectively improved. Moreover, the air spring fatigue test device provided by the embodiment of the present application has simple and compact structure, and the layout is ingenious and reasonable, so that the tensile and compressive strength of the test workpiece can be ensured, and the test workpiece can always keep balance when subjected to three-way loading in the axial direction, the radial direction and the circumferential direction, so that the durability fatigue test of the air spring 30 is more accurate.

[0060] Please further refer to Figure 5 、 Figure 6 and Figure 7 In some embodiments, the transverse swing arm assembly 7 includes a driving arm 71 arranged in a transverse direction and a driven arm 72 arranged in a transverse direction, the first end of the driven arm 72 is rotatably connected with the bottom end of the longitudinal swing arm assembly 6 through a bearing, the second end of the driven arm 72 is rotatably connected with the support seat 3 through a bearing, the first end of the driving arm 71 is rotatably connected with the bottom end of the longitudinal swing arm assembly 6 through a bearing, and the second end of the driving arm 71 is connected with the power output end of the second linear driving mechanism 5. Through the above structure, the driving arm 71 is driven by the second linear driving mechanism 5 to move transversely, and the driving arm 71 drives the longitudinal swing arm assembly 6 moving longitudinally to move transversely, so that the air spring 30 can be simultaneously subjected to axial repeated compression loading test and radial repeated folding loading test. It should be noted that the driving arm 71 and the driven arm 72 are both curved arms.

[0061] Please further refer to Figure 5 ,Figure 6 and Figure 7 In some embodiments, the longitudinal swing arm assembly 6 comprises a longitudinal curved arm 61 curved in S shape and a C-shaped fork arm 62 hinged to the top end of the longitudinal curved arm 61, the first end of the C-shaped fork arm 62 is hinged to the support base 3 through the first hinge assembly 40, the second end of the C-shaped fork arm 62 is hinged to the support base 3 through the second hinge assembly 50, and one end of the rotary swing arm assembly 9 is rotatably connected to the bottom end of the longitudinal curved arm 61 through a bearing. Through the above structure, when the second linear driving mechanism 5 drives the driving arm 71 to move laterally, the driving arm 71 drives the longitudinal swing arm assembly 6 moving longitudinally to move laterally, and the longitudinal swing arm assembly 6 moving laterally drives the rotary swing arm assembly 9 to rotate reciprocatingly at a certain rotation angle, the axial repeated compression loading test, the radial repeated folding loading test and the circumferential torsion loading test of the air spring 30 can be simultaneously realized. It should be noted that the C-shaped fork arm 62 can be replaced by a U-shaped fork arm.

[0062] Please further refer to Figure 5 , Figure 6 and Figure 8 In some embodiments, the rotary swing arm assembly 9 comprises a first rotary arm 91 and a second rotary arm 92 rotatably connected to the first rotary arm 91, the rotary connection between the first rotary arm 91 and the second rotary arm 92 forms an active joint, the end of the first rotary arm 91 away from the active joint is rotatably connected to the bottom end of the longitudinal swing arm assembly 6, and the end of the second rotary arm 92 away from the active joint is hinged to the support base 3. Through the above structure, when the second linear driving mechanism 5 drives the driving arm 71 to move laterally, the driving arm 71 drives the longitudinal swing arm assembly 6 moving longitudinally to move laterally, and the longitudinal swing arm assembly 6 moving laterally drives the rotary swing arm assembly 9 to rotate reciprocatingly at a certain rotation angle, the axial repeated compression loading test, the radial repeated folding loading test and the circumferential torsion loading test of the air spring 30 can be simultaneously realized, and the tensile and compressive strength of the test workpiece can be guaranteed, and the test workpiece can always remain balanced during the axial, radial and circumferential three-way loading, so that the durability fatigue test of the air spring 30 is more accurate. It should be noted that the first rotary arm 91 and the second rotary arm 92 are curved arms.

[0063] Please further refer to Figure 4 , Figure 5 and Figure 6In some embodiments, the connecting arm 10 is arranged in a vertical state, the bottom end of the connecting arm 10 is rotatably connected with the rotating shaft at the movable joint of the rotating swing arm assembly 9 through a bearing, and the top end of the connecting arm 10 is provided with a positioning sleeve 101 for sleeving on the damper 301. Only by inserting and positioning the damper 301 of the air spring 30 in the positioning sleeve 101, the air spring 30 can be quickly loaded, which is beneficial to improve the test efficiency.

[0064] Please further refer to Figure 1 、 Figure 2 and Figure 3 In some embodiments, the connecting seat 20 includes a first seat body 201 fixedly connected with the connecting seat 20 and a second seat body 202 rotatably connected with the first seat body 201, and the second seat body 202 is provided with a positioning tool 203 for positioning the upper top seat 202. Only by positioning the upper top seat 202 of the air spring 30 on the positioning tool 203, the air spring 30 can be quickly loaded, which is beneficial to improve the test efficiency.

[0065] Please further refer to Figure 1 、 Figure 2 and Figure 8 In some embodiments, the first linear drive mechanism 4 is a gas cylinder, and the first linear drive mechanism 4 is an electric cylinder. The piston rod 41 of the gas cylinder and the telescopic rod 51 of the electric cylinder respectively constitute a power output end. The piston rod 41 of the gas cylinder is arranged in a vertical direction, and the telescopic rod 51 of the electric cylinder is arranged in a horizontal direction.

[0066] Please further refer to Figure 1 、 Figure 3 and Figure 8 In some embodiments, the air spring fatigue test device further comprises a cold and warm box 100 for simulating different temperature environments and a temperature adjusting system arranged in the cold and warm box 100. The cold and warm box 100 is slidably arranged on the bearing table 1. When fatigue test under different temperature conditions is needed, only by sliding the cold and warm box 100, the air spring fatigue test device is located in the cold and warm box 100, the fatigue test under different temperature conditions can be simulated. It should be noted that the cold and warm box 100 is slidably arranged on the bearing table 1 through a linear slide rail.

[0067] Please further refer to Figure 1 、 Figure 2 and Figure 8In some embodiments, the air spring fatigue testing device further comprises a pressure sensor 70 for detecting the force applied by the power output end of the first linear drive mechanism 4 to the longitudinal swing arm assembly 6, and a controller for controlling the operation of the first linear drive mechanism 4 according to the pressure signal detected by the pressure sensor 70. The controller is electrically connected to the pressure sensor 70 and the first linear drive mechanism 4, respectively. When the power output end of the first linear drive mechanism 4 applies force to the longitudinal swing arm assembly 6, the pressure sensor 70 can detect the force applied by the power output end of the first linear drive mechanism 4 in real time, so that the controller can record and monitor the force applied by the power output end of the first linear drive mechanism 4 at any time.

[0068] For further reference, please see Figure 1 In some embodiments, the support base 3 comprises a support plate 31 arranged perpendicularly to the table top of the bearing table 1, and a third seat body 32 for supporting and fixing the support plate 31 to the bearing table 1. The third seat body 32 is fixedly connected to the bearing table 1, and the two ends of the C-shaped fork arm 62 of the longitudinal swing arm assembly 6, the transverse swing arm assembly 7, and the rotary swing arm assembly 9 are respectively hinged to the side of the support plate 31 facing the support frame 2. This facilitates the test workpiece to maintain balance during three-way loading in the axial, radial, and circumferential directions, and makes the durability fatigue test of the air spring 30 more accurate.

[0069] For further reference, please see 2, Figure 6 and Figure 7 In some embodiments, the first hinge assembly 40 comprises a first fixed seat 401 fixedly connected to the support base 3, a first hinge seat 402 rotatably arranged on the first fixed seat 401 in a first direction, and a first shaft body capable of rotatably mounting the first end of the C-shaped fork arm 62 to the first hinge seat 402 in a second direction. The first end of the C-shaped fork arm 62 is provided with a first bearing sleeve 621, and a first ball bearing 80 is mounted in the first bearing sleeve 621. The inner ring of the first ball bearing 80 is sleeved on the first shaft body. It should be noted that the first direction is perpendicular to the second direction.

[0070] For further reference, please see Figure 2 , Figure 3 and Figure 6 In some embodiments, the second hinge assembly 50 comprises a second fixed seat 501 fixedly connected to the support base 3, a second hinge seat 502 rotatably arranged on the second fixed seat 501 in a first direction, and a second shaft body capable of rotatably mounting the second end of the C-shaped fork arm 62 to the second hinge seat 502 in a second direction. The second end of the C-shaped fork arm 62 is provided with a second bearing sleeve 622, and a second ball bearing 90 is mounted in the second bearing sleeve 622. The inner ring of the second ball bearing 90 is sleeved on the second shaft body. It should be noted that the first direction is perpendicular to the second direction.

[0071] Please further refer to 2, Figure 3 and Figure 6 In some embodiments, the third hinge assembly 60 comprises a third fixed seat 601 fixedly connected to the support seat 3, a third hinge seat 602 rotatably arranged on the third fixed seat 601 in a first direction, and a third shaft body rotatably arranged on the third hinge seat 602 in a second direction, and the second rotating arm 92 is arranged at one end of the third shaft body away from the movable joint. It should be noted that the first direction is perpendicular to the second direction.

[0072] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An air spring fatigue testing device, characterized in that, include: Support platform; A support frame is mounted on the support platform; The support base is disposed on the support platform near the support frame; A first linear drive mechanism is mounted on the support frame; A second linear drive mechanism is mounted on the support base; A longitudinal swing arm assembly is used to drive an air spring to perform repeated tensile and compressive loading tests along the axial direction. The top end of the longitudinal swing arm assembly is hinged to the support base. A lateral swing arm assembly is used to drive an air spring to perform repeated folding load tests in the radial direction. The lateral swing arm assembly is connected to the bottom end of the longitudinal swing arm assembly, the support base, and the power output end of the second linear drive mechanism. The linkage mechanism includes a vertically arranged first link and a second link rotatably connected to the first link. The first link is fixedly connected to the power output end of the first linear drive mechanism, and the second link is connected to the longitudinal swing arm assembly. A rotating swing arm assembly is used to drive an air spring to perform repeated torsional loading tests along the circumference. The bottom end of the rotating swing arm assembly is rotatably connected to the longitudinal swing arm assembly, and the rotating swing arm assembly is hinged to the support base. A connecting arm is used to connect to the shock absorber of the air spring, and the end of the connecting arm away from the shock absorber is rotatably connected to the movable joint of the rotary swing arm assembly. as well as A connecting seat is used to connect to the upper seat of the air spring, and the connecting seat is connected to the support seat.

2. The air spring fatigue testing device as described in claim 1, characterized in that, The lateral swing arm assembly includes a driven arm and a driving arm arranged laterally. The first end of the driven arm is rotatably connected to the bottom end of the longitudinal swing arm assembly, the second end of the driven arm is rotatably connected to the support base, the first end of the driving arm is rotatably connected to the bottom end of the longitudinal swing arm assembly, and the second end of the driving arm is connected to the power output end of the second linear drive mechanism.

3. The air spring fatigue testing device as described in claim 1, characterized in that, The longitudinal swing arm assembly includes an S-shaped curved longitudinal arm and a C-shaped fork arm hinged to the top of the longitudinal curved arm. The first end of the C-shaped fork arm is hinged to the support seat through a first hinge assembly, and the second end of the C-shaped fork arm is hinged to the support seat through a second hinge assembly. One end of the rotating swing arm assembly is rotatably connected to the bottom end of the longitudinal curved arm.

4. The air spring fatigue testing device as described in claim 1, characterized in that, The rotating arm assembly includes a first rotating arm and a second rotating arm rotatably connected to the first rotating arm. The rotatable connection between the first rotating arm and the second rotating arm forms a movable joint. The end of the first rotating arm away from the movable joint is rotatably connected to the bottom end of the longitudinal swing arm assembly, and the end of the second rotating arm away from the movable joint is hinged to the support base.

5. The air spring fatigue testing device as described in claim 1, characterized in that, The connecting arm is set in a vertical position. The bottom end of the connecting arm is rotatably connected to the pivot shaft at the movable joint of the rotating swing arm assembly through a bearing. The top end of the connecting arm is provided with a positioning sleeve for fitting onto the shock absorber.

6. The air spring fatigue testing device as described in claim 1, characterized in that, The connecting seat includes a first seat body fixedly connected to the connecting seat and a second seat body rotatably connected to the first seat body. The second seat body is provided with a positioning fixture for positioning the connecting upper seat.

7. The air spring fatigue testing device as described in claim 1, characterized in that, The first linear drive mechanism is a pneumatic cylinder, and the first linear drive mechanism is an electric cylinder. The piston rod of the pneumatic cylinder and the telescopic rod of the electric cylinder respectively constitute the power output end. The piston rod of the pneumatic cylinder extends vertically, and the telescopic rod of the electric cylinder extends horizontally.

8. The air spring fatigue testing device as described in claim 1, characterized in that, The air spring fatigue testing device also includes a heating chamber for simulating different temperature environments and a temperature regulation system located inside the heating chamber, wherein the heating chamber is slidably mounted on the support platform.

9. The air spring fatigue testing device as described in claim 1, characterized in that, The air spring fatigue testing device further includes a pressure sensor for detecting the force applied to the longitudinal swing arm assembly by the power output end of the first linear drive mechanism, and a controller for controlling the operation of the first linear drive mechanism based on the pressure signal detected by the pressure sensor. The controller is electrically connected to the pressure sensor and the first linear drive mechanism, respectively.

10. The air spring fatigue testing device according to any one of claims 1 to 9, characterized in that, The support base includes a support plate perpendicular to the platform surface of the support table and a seat body that supports and fixes the support plate to the support table. The seat body is fixedly connected to the support table. The two ends of the C-shaped fork arm of the longitudinal swing arm assembly, the transverse swing arm assembly and the rotary swing arm assembly are respectively hinged to the side of the support plate facing the support frame.

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