Air spring fatigue testing device

Abstract

According to the air spring fatigue test device provided by the invention, the supporting frame and the supporting seat are arranged on the bearing table, and the longitudinal swing arm assembly, the transverse swing arm assembly and the rotary swing arm assembly are arranged between the supporting frame and the supporting seat, so that the air spring can be tested only by connecting the shock absorber of the air spring with the connecting arm; an upper top seat of an air spring is connected with a connecting seat on a supporting seat, a first linear driving mechanism drives a longitudinal swing arm assembly to do longitudinal reciprocating motion through a connecting rod mechanism, and meanwhile a second linear driving mechanism drives a transverse swing arm assembly to do transverse reciprocating motion; the axial repeated compression loading test, the radial repeated pleat loading test and the circumferential repeated distortion loading test can be synchronously performed on the air spring, so that the actual use environment of an automobile can be really simulated to perform the durability fatigue test on the air spring; and the accuracy and reliability of the air spring durability fatigue test are effectively improved. Moreover, the air spring fatigue testing device is simple and compact in structure and ingenious and reasonable in layout.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle parts testing, and in particular, relates to an air spring fatigue testing device. Background Art

[0002] Air springs are part of a vehicle's suspension system, primarily supporting and damping the vehicle's body, enhancing ride comfort. Air spring fatigue testing machines typically place an air spring on a test bench and repeatedly stretch and compress it to achieve fatigue testing. Currently, most air spring fatigue testing machines not only suffer from complex structures but are also only capable of performing repeated stretching and compression loading tests on air springs from either the top-down or bottom-up directions, but are unable to perform repeated radial bending loading tests. This makes it impossible to truly simulate the actual vehicle's operating environment, making it impossible to accurately and reliably perform fatigue testing on air springs for durability. Summary of the Invention

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

[0004] To achieve the above object, the technical solution adopted by the present invention is to provide an air spring fatigue testing device, comprising: Loading platform; A support frame is provided on the bearing platform; A support seat is provided on the bearing platform and adjacent to the support frame; A first linear drive mechanism is provided on the support frame; A second linear drive mechanism is provided on the support seat; A longitudinal swing arm assembly is used to drive the air spring to perform repeated tensile and compressive loading tests along the axial direction, and the top end of the longitudinal swing arm assembly is hinged to the support seat; A transverse swing arm assembly, used to drive the air spring to perform repeated fold loading tests in the radial direction, wherein the transverse swing arm assembly is respectively 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; a connecting rod mechanism comprising a vertically arranged first connecting rod and a second connecting rod rotatably connected to the first connecting rod, wherein the first connecting rod is fixedly connected to the power output end of the first linear drive mechanism, and the second connecting rod is connected to the longitudinal swing arm assembly; a rotating swing arm assembly, used to drive the air spring to perform repeated torsional loading tests along the circumferential direction, the rotating swing arm assembly being rotatably connected to the bottom end of the longitudinal swing arm assembly, and the rotating swing arm assembly being hinged to the support seat; A connecting arm, used to be connected to the shock absorber of the air spring, wherein one end of the connecting arm away from the shock absorber is rotatably connected to the movable joint of the rotating swing arm assembly; and The connecting seat is used to be connected to the upper seat of the air spring, and the connecting seat is connected to the supporting seat.

[0005] Furthermore, the lateral swing arm assembly includes a laterally arranged follower arm and a laterally arranged driving arm, the first end of the follower arm is rotatably connected to the bottom end of the longitudinal swing arm assembly, the second end of the follower arm is rotatably connected to the support seat, 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.

[0006] Furthermore, the longitudinal swing arm assembly includes an S-shaped longitudinal curved arm and a C-shaped fork arm hinged to the top end 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, the second end of the C-shaped fork arm is hinged to the support seat through a second hinge assembly, and one end of the rotating swing arm assembly is rotatably connected to the bottom end of the longitudinal curved arm.

[0007] Furthermore, the rotating swing arm assembly includes a first rotating arm and a second rotating arm rotatably connected to the first rotating arm, and the rotating 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 seat.

[0008] Furthermore, 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 rotating swing arm assembly through a bearing, and the top end of the connecting arm is provided with a positioning sleeve for being sleeved on the shock absorber.

[0009] Furthermore, 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 and connecting to the top seat.

[0010] Furthermore, 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 ends. The piston rod of the pneumatic cylinder extends in the vertical direction, and the telescopic rod of the electric cylinder extends in the horizontal direction.

[0011] Furthermore, the air spring fatigue testing device also includes a cooling and heating box for simulating different temperature environments and a temperature regulating system arranged inside the cooling and heating box, and the cooling and heating box is slidably arranged on the supporting platform.

[0012] Furthermore, the air spring fatigue testing device also includes a pressure sensor for detecting the force applied by the power output end of the first linear drive mechanism to the longitudinal swing arm assembly and a controller for controlling the operation of the first linear drive mechanism according to the pressure signal detected by the pressure sensor, and the controller is electrically connected to the pressure sensor and the first linear drive mechanism respectively.

[0013] Furthermore, the support seat includes a support plate arranged perpendicular to the table surface of the supporting platform and a seat body supporting and fixing the support plate on the supporting platform. The seat body is fixedly connected to the supporting platform, and the two ends of the C-shaped fork arm of the longitudinal swing arm assembly, the transverse swing arm assembly and the rotating swing arm assembly are respectively hinged on the side of the support plate facing the support frame.

[0014] Compared with the prior art, the above one or more technical solutions in the embodiments of the present invention have at least one of the following beneficial effects: The air spring fatigue testing device in the embodiment of the present invention is configured by arranging a support frame and a support seat on a load-bearing platform, arranging a longitudinal swing arm assembly, a transverse swing arm assembly and a rotating swing arm assembly in the air between the support frame and the support seat, and movably connecting the longitudinal swing arm assembly to the power output end of the first linear drive mechanism through a connecting rod mechanism. Since the transverse swing arm assembly is connected to the power output end of the first linear drive mechanism, and the transverse swing arm assembly is rotatably connected to the bottom end of the longitudinal swing arm assembly and the support seat respectively, the rotating swing arm assembly is rotatably connected to the bottom end of the longitudinal swing arm assembly, the rotating swing arm assembly is hinged to the support seat, and the connecting arm and the rotating swing arm assembly are movable joints. The air spring is connected to the connecting arm by rotation, and the upper seat of the air spring is connected to the connecting seat on the support seat. The first linear drive mechanism drives the longitudinal swing arm assembly to perform longitudinal reciprocating motion through the connecting rod mechanism, and the second linear drive mechanism drives the transverse swing arm assembly to perform transverse reciprocating motion. The air spring can be subjected to axial repeated compression loading test, radial repeated fold loading test, and circumferential repeated torsion loading test simultaneously. This can truly simulate the actual use environment of the automobile to perform durability fatigue test on the air spring, effectively improving the accuracy and reliability of the air spring durability fatigue test. In addition, the air spring fatigue test device provided by the embodiment of the present invention has a simple and compact structure and a clever and reasonable layout. It can not only ensure the tensile and compressive strength of the test workpiece, but also ensure that the test workpiece always maintains balance when loaded in the three directions of axial, radial and circumferential directions, making the durability fatigue test of the air spring more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 A schematic diagram of the three-dimensional structure of an air spring fatigue testing device provided in an embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the partially enlarged structure; Figure 3 Another schematic diagram of the three-dimensional structure of the air spring fatigue testing device provided by an embodiment of the present invention; Figure 4 for Figure 3 A schematic diagram of the partially enlarged structure; Figure 5 An assembly diagram of the longitudinal swing arm assembly, the transverse swing arm assembly, and the rotary swing arm assembly provided in an embodiment of the present invention; Figure 6 Another assembly diagram of the longitudinal swing arm assembly, the transverse swing arm assembly, and the rotating swing arm assembly provided in an embodiment of the invention; Figure 7 An assembly diagram of a longitudinal swing arm assembly and a transverse swing arm assembly provided in an embodiment of the invention; Figure 8 This is an exploded view of an air spring fatigue testing device provided by an embodiment of the present invention.

[0017] Among them, the reference numerals in the figures are: 1-carrying platform; 2-support frame; 3-support seat; 31-support plate; 32-third seat body; 4-first linear drive mechanism; 41-piston rod; 5-second linear drive mechanism; 51-telescopic rod; 6-longitudinal swing arm assembly; 61-longitudinal crank arm; 62-C-type fork arm; 621-first bearing sleeve; 622-second bearing sleeve; 7-lateral swing arm assembly; 71-driving arm; 72-driven arm; 8-link mechanism; 81-first link; 82-second link; 9-rotating swing arm assembly; 91-first rotating arm; 92-second rotating arm; 10-connecting arm; 101-positioning sleeve; 20-connecting seat; 201-first seat body; 202-second seat body; 203-positioning tooling 30-air spring; 301-shock absorber; 302-upper seat; 40-first hinge assembly; 401-first fixing seat; 402-first hinge seat; 50-second hinge assembly; 501-second fixing seat; 502-second hinge seat; 60-third hinge assembly; 601-third fixed seat; 602-third hinge seat; 70-pressure sensor; 80-first ball bearing; 90-second ball bearing; 100-cooling and heating box. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] It should be noted that when an element is referred to as being “connected to” or “disposed on” another element, it may 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 may be directly connected to the other element or indirectly connected to the other element.

[0020] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first," "second," or "third" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined. "Multiple" means one or more, unless otherwise specifically defined.

[0021] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a dedicated orientation, be constructed and operated in a dedicated orientation, and therefore should not be understood as limiting the present invention.

[0022] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and may encompass internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0023] 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 present application. Thus, when the phrases "in one embodiment," "in some embodiments," or "in some embodiments" appear in various places throughout this specification, not all references are to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0024] Please also refer to Figures 1 to 8 The air spring fatigue testing device provided by the embodiment of the present invention is now described. Figure 1 、 Figure 2 and Figure 3The air spring fatigue testing device provided by the embodiment of the present invention includes a bearing platform 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 platform 1, the support seat 3 is fixedly arranged on the bearing platform 1 at a position adjacent 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 perform repeated tensile and compression loading tests in the axial direction, the transverse swing arm assembly 7 is used to drive the air spring 30 to perform repeated folding loading tests in the radial direction, and the rotary swing arm assembly 9 is used to drive the air spring 30 to perform repeated torsion loading tests in the circumferential direction. The connecting rod mechanism 8 is used to movably connect the longitudinal swing arm assembly 6 with the power output end of the first linear drive mechanism 4. The connecting rod mechanism 8 includes a first connecting rod 81 arranged vertically and a second connecting rod 82 rotatably connected to the first connecting rod 81. The first connecting rod 81 is fixedly connected to the power output end of the first linear drive mechanism 4, and the second connecting rod 82 is connected to the longitudinal swing arm assembly 6. The top end of the longitudinal swing arm assembly 6 is hinged to the support seat 3. The transverse swing arm assembly 7 is respectively connected to 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. The rotating swing arm assembly 9 is rotatably connected to the bottom end of the longitudinal swing arm assembly 6, and the rotating swing arm assembly 9 is hinged to the support seat 3. The connecting arm 10 is used to connect to the shock absorber 301 of the air spring 30, and the end of the connecting arm 10 away from the shock absorber 301 is rotatably connected to the movable joint of the rotating swing arm assembly 9. The connecting seat 20 is used to connect to the upper top seat 302 of the air spring 30, and the connecting seat 20 is connected to the support seat 3. Please refer to further reference. Figure 3 、 Figure 4 and Figure 5When the air spring fatigue test device provided by the embodiment of the present invention is used to perform a fatigue test on the air spring 30, it is only necessary to connect the shock absorber 301 of the air spring 30 to the connecting arm 10, and connect the upper seat 302 of the air spring 30 to the connecting seat 20. The first linear drive mechanism 4 and the second linear drive mechanism 5 are controlled by the controller to work. The first linear drive mechanism 4 drives the longitudinal swing arm assembly 6 to perform longitudinal (roughly along the axial direction of the air spring 30) reciprocating motion through the connecting rod mechanism 8. At the same time, the second linear drive mechanism 5 drives the transverse swing arm assembly 7 to perform transverse (roughly along the radial direction of the air spring 30) reciprocating motion. Component 7 is rotatably connected to the bottom end of the longitudinal swing arm assembly 6 and the support seat 3, respectively, and the rotating swing arm assembly 9 is rotatably connected to the bottom end of the longitudinal swing arm assembly 6. The rotating swing arm assembly 9 is hinged to the support seat 3, and the end of the connecting arm 10 away from the shock absorber 301 is rotatably connected to the movable joint of the rotating swing arm assembly 9. This can simultaneously achieve axial repeated compression loading testing, radial repeated fold loading testing, and circumferential repeated torsion loading testing of the air spring 30, thereby truly simulating the actual use environment of the automobile to perform a durability fatigue test on the air spring 30, effectively improving the accuracy and reliability of the durability fatigue test of the air spring 30. In addition, the air spring fatigue testing device provided by the embodiment of the present invention has a simple structure, which can not only ensure the tensile and compressive strength of the test workpiece, but also ensure that the test workpiece always remains balanced when loaded in the three directions of axial, radial, and circumferential directions, making the durability fatigue test of the air spring 30 more accurate.

[0025] The air spring fatigue testing device provided by the embodiment of the present invention is compared with the prior art, by arranging a support frame 2 and a support seat 3 on the bearing platform 1, and suspending a longitudinal swing arm assembly 6, a transverse swing arm assembly 7 and a rotating swing arm assembly 9 between the support frame 2 and the support seat 3, and movably connecting the longitudinal swing arm assembly 6 with the power output end of the first linear drive mechanism 4 through a connecting rod mechanism 8. Since the transverse swing arm assembly 7 is connected to the power output end of the first linear drive mechanism 4, and the transverse swing arm assembly 7 is rotatably connected to the bottom end of the longitudinal swing arm assembly 6 and the support seat 3 respectively, the rotating swing arm assembly 9 is rotatably connected to the bottom end of the longitudinal swing arm assembly 6, the rotating swing arm assembly 9 is hinged to the support seat 3, and the connecting arm 10 is movably connected to the rotating swing arm assembly 9. The air spring 30 is rotatably connected at the movable joint. Simply connecting the shock absorber 301 of the air spring 30 to the connecting arm 10 and the upper seat 302 of the air spring 30 to the connecting seat 20 on the support seat 3 is required. The first linear drive mechanism 4 drives the longitudinal swing arm assembly 6 to perform longitudinal reciprocating motion through the connecting rod mechanism 8, while the second linear drive mechanism 5 drives the transverse swing arm assembly 7 to perform transverse reciprocating motion. This allows the air spring 30 to be simultaneously subjected to axial repeated compression loading tests, radial repeated flexure loading tests, and circumferential repeated torsion loading tests. This allows the air spring 30 to be subjected to a durability fatigue test that truly simulates the actual use environment of a vehicle, effectively improving the accuracy and reliability of the durability fatigue test of the air spring 30. Furthermore, the air spring fatigue test device provided by the embodiment of the present invention has a simple and compact structure and a clever and reasonable layout. It can ensure the tensile and compressive strength of the test workpiece while ensuring that the test workpiece remains balanced under axial, radial, and circumferential loading, making the durability fatigue test of the air spring 30 more accurate.

[0026] Please refer to further Figure 5 、 Figure 6 and Figure 7 In some embodiments, the lateral swing arm assembly 7 includes a transversely disposed driving arm 71 and a transversely disposed driven arm 72. The first end of the driven arm 72 is rotationally connected to the bottom end of the longitudinal swing arm assembly 6 via a bearing, and the second end of the driven arm 72 is rotationally connected to the support base 3 via a bearing. The first end of the driving arm 71 is rotationally connected to the bottom end of the longitudinal swing arm assembly 6 via a bearing, and the second end of the driving arm 71 is connected to the power output end of the second linear drive mechanism 5. With the above-described structural arrangement, when the second linear drive mechanism 5 drives the driving arm 71 to move transversely, the driving arm 71 drives the longitudinal swing arm assembly 6, which is performing longitudinal movement, to generate transverse movement, thereby simultaneously performing axial repeated compression loading tests and radial repeated flexure loading tests on the air spring 30. It should be noted that both the driving arm 71 and the driven arm 72 are curved arms.

[0027] Please refer to further Figure 5 、 Figure 6 and Figure 7 In some embodiments, the longitudinal swing arm assembly 6 includes an S-shaped longitudinal curved arm 61 and a C-shaped fork arm 62 hinged to the top of the longitudinal curved arm 61. The first end of the C-shaped fork arm 62 is hinged to the support base 3 via a first hinge assembly 40, and the second end of the C-shaped fork arm 62 is hinged to the support base 3 via a second hinge assembly 50. One end of the rotary swing arm assembly 9 is rotatably connected to the bottom end of the longitudinal curved arm 61 via a bearing. Through the above-mentioned structural arrangement, the second linear drive mechanism 5 drives the drive arm 71 to perform lateral movement, and the drive arm 71 drives the longitudinal swing arm assembly 6 to perform lateral movement. The longitudinal swing arm assembly 6 that generates lateral movement then drives the rotary swing arm assembly 9 to perform reciprocating rotational movement at a certain rotation angle, thereby simultaneously achieving axial repeated compression loading test, radial repeated fold loading test, and circumferential torsion loading test on the air spring 30. It should be noted that the C-shaped fork arm 62 can also be replaced by a U-shaped fork arm.

[0028] Please refer to further Figure 5 、 Figure 6 and Figure 8 In some embodiments, the rotating swing arm assembly 9 includes a first rotating arm 91 and a second rotating arm 92 rotatably connected to the first rotating arm 91. The rotational connection between the first rotating arm 91 and the second rotating arm 92 forms a movable joint. The end of the first rotating arm 91 remote from the movable joint is rotationally connected to the bottom end of the longitudinal swing arm assembly 6, and the end of the second rotating arm 92 remote from the movable joint is hingedly connected to the support base 3. Through the above-mentioned structural arrangement, the second linear drive mechanism 5 drives the driving arm 71 to move laterally, and the driving arm 71 drives the longitudinal swing arm assembly 6 to move laterally. The longitudinal swing arm assembly 6 that generates the laterally moving longitudinal swing arm assembly 6 in turn drives the rotating swing arm assembly 9 to rotate back and forth at a certain rotation angle. This can simultaneously perform axial repeated compression loading tests, radial repeated flexure loading tests, and circumferential torsion loading tests on the air spring 30, while ensuring the tensile and compressive strength of the test workpiece. At the same time, the test workpiece can always maintain balance under the three-way loading in the axial, radial, and circumferential directions, making the durability fatigue test of the air spring 30 more accurate. It should be noted that the first rotating arm 91 and the second rotating arm 92 are curved arms.

[0029] Please refer to further Figure 4 、 Figure 5 and Figure 6In some embodiments, the connecting arm 10 is arranged in a vertical state, and the bottom end of the connecting arm 10 is rotatably connected to the rotating shaft at the movable joint of the rotating swing arm assembly 9 through a bearing. The top end of the connecting arm 10 is provided with a positioning sleeve 101 for being sleeved on the shock absorber 301. The air spring 30 can be quickly loaded by simply inserting and positioning the shock absorber 301 of the air spring 30 in the positioning sleeve 101, which is conducive to improving testing efficiency.

[0030] Please refer to further Figure 1 、 Figure 2 and Figure 3 In some embodiments, the connecting seat 20 includes a first seat body 201 fixedly connected to the connecting seat 20 and a second seat body 202 rotatably connected to the first seat body 201. The second seat body 202 is provided with a positioning tool 203 for positioning and connecting the upper top seat 202. The air spring 30 can be quickly loaded by simply positioning the upper top seat 202 of the air spring 30 on the positioning tool 203, which is conducive to improving testing efficiency.

[0031] Please refer to further Figure 1 、 Figure 2 and Figure 8 In some embodiments, the first linear drive mechanism 4 is a pneumatic cylinder, and the first linear drive mechanism 4 is an electric cylinder. The piston rod 41 of the pneumatic cylinder and the telescopic rod 51 of the electric cylinder respectively constitute the power output ends. The piston rod 41 of the pneumatic cylinder extends in the vertical direction, and the telescopic rod 51 of the electric cylinder extends in the horizontal direction.

[0032] Please refer to further Figure 1 、 Figure 3 and Figure 8 In some embodiments, the air spring fatigue testing apparatus further includes a cooling and heating chamber 100 for simulating different temperature environments and a temperature control system disposed within the cooling and heating chamber 100. The cooling and heating chamber 100 is slidably mounted on the support platform 1. To simulate fatigue tests under different temperature conditions, the cooling and heating chamber 100 is simply slid so that the air spring fatigue testing apparatus is located within the cooling and heating chamber 100. This allows fatigue tests under different temperature conditions to be simulated. It should be noted that the cooling and heating chamber 100 is slidably mounted on the support platform 1 via linear slides.

[0033] Please refer to further Figure 1 、 Figure 2 and Figure 8In some embodiments, the air spring fatigue testing apparatus further includes 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 based on 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 be used to detect the magnitude of 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 magnitude of the force applied by the power output end of the first linear drive mechanism 4 at any time.

[0034] Please refer to further Figure 1 In some embodiments, the support seat 3 includes a support plate 31 arranged perpendicular to the table surface of the supporting platform 1 and a third seat body 32 supporting and fixing the support plate 31 on the supporting platform 1. The third seat body 32 is fixedly connected to the supporting platform 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 rotating swing arm assembly 9 are respectively hinged to the side of the support plate 31 facing the support frame 2, which is conducive to ensuring that the test workpiece always remains balanced when loaded in the three directions of axial, radial and circumferential directions, so that the durability fatigue test of the air spring 30 is more accurate.

[0035] Please refer to 2. Figure 6 and Figure 7 In some embodiments, the first hinge assembly 40 includes a first fixed base 401 fixedly connected to the support base 3, a first hinge base 402 rotatably mounted on the first fixed base 401 along a first direction, and a first shaft capable of rotatably mounting the first end of the C-shaped fork arm 62 on the first hinge base 402 along a second direction. The first end of the C-shaped fork arm 62 is provided with a first bearing sleeve 621, which houses a first ball bearing 80. The inner ring of the first ball bearing 80 is mounted on the first shaft. It should be noted that the first direction is perpendicular to the second direction.

[0036] Please refer to further Figure 2 、 Figure 3 and Figure 6 In some embodiments, the second hinge assembly 50 includes a second fixed base 501 fixedly connected to the support base 3, a second hinge base 502 rotatably mounted on the second fixed base 501 along a first direction, and a second shaft capable of rotatably mounting the second end of the C-shaped fork arm 62 on the second hinge base 502 along a second direction. The second end of the C-shaped fork arm 62 is provided with a second bearing sleeve 622, which houses a second ball bearing 90. The inner ring of the second ball bearing 90 is mounted on the second shaft. It should be noted that the first direction is perpendicular to the second direction.

[0037] Please refer to 2. Figure 3 and Figure 6 In some embodiments, the third hinge assembly 60 includes a third fixed base 601 fixedly connected to the support base 3, a third hinge base 602 rotatably mounted on the third fixed base 601 along a first direction, and a third shaft mounted on the third hinge base 602 to rotate the end of the second rotating arm 92 away from the movable joint along a second direction. It should be noted that the first direction is perpendicular to the second direction.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An air spring fatigue testing device, characterized in that: include: Loading platform; A support frame is provided on the bearing platform; A support seat is provided on the bearing platform and adjacent to the support frame; A first linear drive mechanism is provided on the support frame; A second linear drive mechanism is provided on the support seat; A longitudinal swing arm assembly is used to drive the air spring to perform repeated tensile and compressive loading tests along the axial direction, and the top end of the longitudinal swing arm assembly is hinged to the support seat; A transverse swing arm assembly, used to drive the air spring to perform repeated fold loading tests in the radial direction, wherein the transverse swing arm assembly is respectively 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; a connecting rod mechanism comprising a vertically arranged first connecting rod and a second connecting rod rotatably connected to the first connecting rod, wherein the first connecting rod is fixedly connected to the power output end of the first linear drive mechanism, and the second connecting rod is connected to the longitudinal swing arm assembly; a rotating swing arm assembly, used to drive the air spring to perform repeated torsional loading tests along the circumferential direction, the rotating swing arm assembly being rotatably connected to the bottom end of the longitudinal swing arm assembly, and the rotating swing arm assembly being hinged to the support seat; A connecting arm, used to be connected to the shock absorber of the air spring, wherein one end of the connecting arm away from the shock absorber is rotatably connected to the movable joint of the rotating swing arm assembly; as well as The connecting seat is used to be connected to the upper seat of the air spring, and the connecting seat is connected to the supporting seat.

2. The air spring fatigue testing device according to claim 1, characterized in that: The lateral swing arm assembly includes a laterally arranged driven arm and a laterally arranged driving arm, 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 seat, 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 according to claim 1, wherein: The longitudinal swing arm assembly includes an S-shaped longitudinal curved arm and a C-shaped fork arm hinged to the top end 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 according to claim 1, wherein: The rotating swing arm assembly includes a first rotating arm and a second rotating arm rotatably connected to the first rotating arm. The rotating 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 seat.

5. The air spring fatigue testing device according to claim 1, wherein: 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 rotating swing arm assembly through a bearing, and the top end of the connecting arm is provided with a positioning sleeve for being sleeved on the shock absorber.

6. The air spring fatigue testing device according to claim 1, wherein: 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 tool for positioning and connecting to the top seat.

7. The air spring fatigue testing device according to claim 1, wherein: The first linear drive mechanism is an air cylinder, and the first linear drive mechanism is an electric cylinder. The piston rod of the air cylinder and the telescopic rod of the electric cylinder respectively constitute the power output ends. The piston rod of the air cylinder extends in the vertical direction, and the telescopic rod of the electric cylinder extends in the horizontal direction.

8. The air spring fatigue testing device according to claim 1, wherein: The air spring fatigue testing device further includes a cooling and heating box for simulating different temperature environments and a temperature regulating system arranged inside the cooling and heating box. The cooling and heating box is slidably arranged on the supporting platform.

9. The air spring fatigue testing device according to claim 1, wherein: The air spring fatigue testing device also includes a pressure sensor for detecting the force applied by the power output end of the first linear drive mechanism to the longitudinal swing arm assembly and a controller for controlling the operation of the first linear drive mechanism according to the pressure signal detected by the pressure sensor, and 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 seat includes a support plate arranged perpendicular to the table surface of the supporting platform and a seat body supporting and fixing the support plate on the supporting platform. The seat body is fixedly connected to the supporting platform. The two ends of the C-shaped fork arm of the longitudinal swing arm assembly, the transverse swing arm assembly and the rotating swing arm assembly are respectively hinged on the side of the support plate facing the support frame.

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