Leaf spring bench test system

Abstract

The embodiment of the present application discloses a bench test system for leaf springs, comprising: a base frame provided with a mounting position for a leaf spring to be rotatably mounted; two loading mechanisms rotatably disposed at both ends of the base frame, respectively used to apply vertical loads to both ends of the leaf spring; two constraint guide mechanisms corresponding one to one with the loading mechanisms, the constraint guide mechanisms comprising a first fixing member and a first constraint arm, the first fixing member being rotatably disposed on the loading mechanism and used to fix one end of the leaf spring, one end of the first constraint arm being connected to the first fixing member, and the other end being rotatably connected to the base frame. The bench test system for leaf springs in the embodiment of the present application has an ingenious structure. Through the combined action of the two loading mechanisms and the two constraint guide mechanisms, it can more accurately simulate the motion trajectory and force conditions of the leaf spring in actual working conditions, thereby ensuring the accuracy of the leaf spring test structure.

Description

Technical Field

[0001] The embodiments of the present application belong to the technical field of automobile components, and in particular, relate to a leaf spring bench test system. Background Art

[0002] Leaf springs are one of the most widely used elastic elements in automotive suspension systems. They are crucial components for elastically connecting the vehicle body to the wheels, transmitting forces and torques between the wheels and the vehicle body. They also mitigate impact loads transmitted to the vehicle body by uneven road surfaces, attenuating vibrations caused by these impacts and ensuring normal vehicle operation. The performance of automotive leaf springs directly impacts multiple aspects of vehicle performance, including safety, comfort, and handling stability. Therefore, automotive leaf spring testing has always been a key and essential test item.

[0003] Currently, most test benches used for automotive steel plate testing are conventional single-axis vertical test benches, capable of simulating a limited range of operating conditions. For some leaf springs used in automotive suspension systems, their front and rear ends bear complex loads from the vehicle's center and rear axles, respectively. This means that during actual vehicle operation, the front and rear ends of the leaf springs experience forces of varying magnitude and direction. These single-axis vertical test benches cannot effectively simulate the complex load conditions experienced during actual vehicle operation, affecting the accuracy of test results. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a leaf spring bench test system with an ingenious structure that can effectively simulate the motion trajectory and stress conditions of a leaf spring under actual working conditions, thereby ensuring the accuracy of the leaf spring test structure.

[0005] The leaf spring bench test system according to an embodiment of the present application includes:

[0006] The base frame is provided with a mounting position for rotating and mounting the leaf spring;

[0007] Two loading mechanisms are rotatably disposed at both ends of the base frame, and are used to apply vertical loads to both ends of the leaf spring respectively;

[0008] Two constraint guide mechanisms correspond one-to-one to the loading mechanism. The constraint guide mechanism includes a first fixing member and a first constraint arm. The first fixing member is rotatably set on the loading mechanism and is used to fix one end of the leaf spring. One end of the first constraint arm is connected to the first fixing member, and the other end is rotatably connected to the base frame.

[0009] The leaf spring bench test system according to the embodiment of the present application has at least the following beneficial effects:

[0010] Before conducting a leaf spring test on the leaf spring bench test system of the present application, the operator can first rotate the leaf spring to be tested and mount it on the mounting position of the base frame, and at the same time fix the two ends of the leaf spring to the corresponding first fixing parts respectively, thereby completing the installation of the leaf spring. During the test, the two loading mechanisms work to drive the first fixing part to move vertically upward, thereby loading the upward vertical load onto the leaf spring, causing the two ends of the leaf spring to undergo bending elastic deformation, thereby simulating the force conditions at both ends of the leaf spring when the axle of the actual vehicle bounces relative to the frame; at the same time, the system connects the first constraint arm to the first fixing part and rotates the first constraint arm to connect to the base frame. When the leaf spring undergoes bending elastic deformation under the vertical load, the first fixing part on the loading mechanism will be constrained by the first constraint arm, causing the entire loading mechanism to swing a certain angle around the rotation connection point with the base frame, and synchronously drive the first constraint arm to rotate around the rotation connection point with the base frame, so that the first constraint arm uses the first fixing part to load the load along the length direction of the first constraint arm onto the leaf spring, thereby simulating the axle of the actual vehicle to be subjected to forces in directions other than the vertical direction at both ends of the leaf spring during operation, further improving the simulation of the motion trajectory and force conditions of the leaf spring under actual working conditions. The entire leaf spring bench test system has an ingenious structure. Through the joint action of two loading mechanisms and two constraint guide mechanisms, it can more accurately simulate the motion trajectory and force conditions of the leaf spring under actual working conditions, ensuring the accuracy of the leaf spring test structure.

[0011] According to some embodiments of the present application, the constraint guide mechanism also includes a second constraint arm, one end of the second constraint arm is connected to the first fixing member, and the other end of the second constraint arm is rotatably connected to the base frame, and the first constraint arm and the second constraint arm are spaced apart relative to the leaf spring.

[0012] According to some embodiments of the present application, the first restraint arm, the second restraint arm, and the first fixing member constitute a double rocker mechanism.

[0013] According to some embodiments of the present application, the first restraint arm and the second restraint arm are respectively located at the upper and lower parts of the leaf spring, and the first restraint arm includes two connecting sections at an angle to each other, one end of each connecting section is rotatably connected to the base frame, and the other end of each connecting section is connected to the first fixing member.

[0014] According to some embodiments of the present application, the loading mechanism includes a linear drive member and a mounting seat, the upper end of the linear drive member is rotatably set on the base frame, the output end of the linear drive member is connected to the mounting seat, and the first fixing member is rotatably installed on the mounting seat.

[0015] According to some embodiments of the present application, the first fixing member is mounted on the mounting seat via a first rotating shaft.

[0016] According to some embodiments of the present application, a second fixing member is provided at the mounting position, the second fixing member is rotatably mounted on the base frame, and the middle portion of the leaf spring is fixed to the second fixing member.

[0017] According to some embodiments of the present application, the second fixing member is mounted on the base frame via a second rotating shaft, and the corresponding two first constraint arms in the two constraint guide mechanisms are symmetrically distributed relative to the second rotating shaft.

[0018] According to some embodiments of the present application, a bushing is provided between the second fixing member and the second rotating shaft.

[0019] According to some embodiments of the present application, the first fixing member is an adjustable clamp adapted to the thickness of the leaf spring.

[0020] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0022] Figure 1 is a schematic structural diagram of a leaf spring bench test system according to some embodiments of the present application;

[0023] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle;

[0024] Figure 3 yes Figure 1 A partial enlarged view of point B in the middle;

[0025] Figure 4 is a side view of a leaf spring bench test system according to some embodiments of the present application;

[0026] Figure 5 This is a partial structural diagram of the leaf spring bench test system in some embodiments of the present application. Figure 1 ;

[0027] Figure 6 yes Figure 5A partial enlarged view of point C in the middle;

[0028] Figure 7 This is a partial structural diagram of the leaf spring bench test system in some embodiments of the present application. Figure 2 ;

[0029] Figure 8 This is a partial structural diagram of the leaf spring bench test system in some embodiments of the present application. Figure 3 .

[0030] In the accompanying drawings: base frame 100; mounting position 110; loading mechanism 200; linear drive member 210; mounting seat 220; constraint guide mechanism 300; first fixing member 310; first constraint arm 320; second constraint arm 330; second fixing member 400; cover plate 410; spring seat 420; U-bolt 500; first rotating shaft 600; second rotating shaft 700; bushing 800; leaf spring 900. DETAILED DESCRIPTION

[0031] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0033] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0034] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0036] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0037] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0038] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0039] See also Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The embodiment of the present application discloses a leaf spring bench test system, which includes a base frame 100, two loading mechanisms 200 and two constraint guide mechanisms 300.

[0040] The base frame 100 is provided with a mounting position 110 for the leaf spring 900 to be rotatably mounted. Two loading mechanisms 200 are rotatably mounted at both ends of the base frame 100, and the two loading mechanisms 200 are used to apply vertical loads to both ends of the leaf spring 900.

[0041] The two constraint guide mechanisms 300 are arranged in a one-to-one correspondence with the two loading mechanisms 200. Each constraint guide mechanism 300 includes a first fixing member 310 and a first constraint arm 320. The first fixing member 310 is rotatably set on the loading mechanism 200 and is used to fix one end of the leaf spring 900. One end of the first constraint arm 320 is connected to the first fixing member 310, and the other end is rotatably connected to the base frame 100.

[0042] Before conducting a leaf spring 900 test in the leaf spring bench test system of the present application, the operator can first rotate the middle part of the leaf spring 900 to be tested and mount it on the mounting position 110 of the base frame 100 to ensure that the middle part of the leaf spring 900 is stable relative to the base frame 100, and at the same time fix the two ends of the leaf spring 900 to the corresponding first fixing parts 310, thereby completing the installation of the leaf spring 900 and accurately simulating the assembly state of the leaf spring 900 in a real vehicle.

[0043] It should be noted that the leaf spring 900 is initially in a substantially horizontal, straight position before testing. The front and rear ends of the leaf spring 900 correspond to the center and rear axle positions of the actual vehicle, ensuring that the initial position of the leaf spring 900 is roughly consistent with that in the actual vehicle.

[0044] It should be noted that the base frame 100 can be an open frame, preferably comprising two gantries. The two loading mechanisms 200 are rotatably mounted on the two gantries. The power source for the two loading mechanisms 200 can be a hydraulic cylinder, telescopic cylinder, linear actuator, or other power component. The specific power source is not limited, as long as it can achieve linear telescopic function. In addition, the spacing between the two loading mechanisms 200 is equal to the spacing between the center and rear axles of an actual vehicle, further ensuring that the front and rear ends of the leaf spring 900 are positioned in the same state as in an actual vehicle.

[0045] When the entire system is tested, the two loading mechanisms 200 work to drive the first fixing part 310 to move upward, thereby applying an upward vertical load to the leaf spring 900. Since the middle part of the leaf spring 900 is stable relative to the base frame 100, the two ends of the leaf spring 900 are subjected to the upward vertical load, that is, they are elastically deformed and bent upward. In this way, the function of simulating the force conditions at the two ends of the leaf spring 900 when the axle of a real vehicle bounces relative to the frame is achieved.

[0046] Of course, the two loading mechanisms 200 can operate intermittently, that is, they can operate asynchronously, so that the vertical loads applied to the ends of the leaf spring 900 are different, better adapting to the different forces applied to the leaf spring 900 in actual working conditions. Specifically, the operation of the two loading mechanisms 200 can be adjusted according to test requirements to meet the needs of different conditions.

[0047] In addition, the present leaf spring bench test system connects the first constraint arm 320 to the first fixing member 310 and rotates the first constraint arm 320 to connect to the base frame 100. When the leaf spring 900 is subjected to a vertical load and undergoes bending elastic deformation, the first fixing member 310 on the loading mechanism 200 will be constrained by the first constraint arm 320, so that the entire loading mechanism 200 will swing a certain angle around the rotation connection point with the base frame 100, and synchronously drive the first constraint arm 320 to rotate around the rotation connection point with the base frame 100, so that the first constraint arm 320 uses the first fixing member 310 to load the load along the length direction of the first constraint arm 320 to the leaf spring 900, thereby simulating the axle of a real vehicle to be subjected to forces in directions other than the vertical direction at both ends of the leaf spring 900 during operation, further improving the motion trajectory and force conditions of the simulated leaf spring 900 under actual working conditions.

[0048] In addition, it is not difficult to understand that since the leaf spring 900 is rotatably mounted on the base frame 100, when the two ends of the leaf spring 900 are subjected to forces of different sizes and directions, the leaf spring 900 will also rotate around the rotation connection point with the base frame 100, more accurately simulating the irregular movement of the leaf spring 900 in actual working conditions and the forces of different directions and sizes.

[0049] It is not difficult to understand that during the above test process, under the constraints of the loading mechanism 200 and the first constraint arm 320, the first fixing member 310 and the two ends of the leaf spring 900 do not perform a single linear lifting motion, but a more complex planar motion, which well simulates the movement of the leaf spring 900 under actual working conditions.

[0050] The entire leaf spring bench test system has an ingenious structure. Through the joint action of two loading mechanisms 200 and two constraint guide mechanisms 300, it can more accurately simulate the motion trajectory and force conditions of the leaf spring 900 under actual working conditions, thereby ensuring the accuracy of the leaf spring 900 test structure.

[0051] See Figure 4 、 Figure 5 、 Figure 6 and Figure 7 In some embodiments of the present application, the constraint guide mechanism 300 further includes a second constraint arm 330. One end of the second constraint arm 330 is connected to the first fixing member 310, and the other end of the second constraint arm 330 is rotatably connected to the base frame 100. The first constraint arm 320 and the second constraint arm 330 are spaced apart relative to the leaf spring 900. Specifically, the second constraint arm 330 can be hinged to the base frame 100 via a hinged support to achieve a rotatable connection with the base frame 100.

[0052] It can be understood that when the leaf spring 900 is subjected to a vertical load and bends upward and elastically deforms, the first fixing member 310 on the loading mechanism 200 will also be constrained by the second restraint arm 330, that is, when the first fixing member 310 and the end of the leaf spring 900 make a planar motion, the first fixing member 310 will also synchronously drive the second restraint arm 330 to rotate around the rotation connection point with the base frame 100, so that the second restraint arm 330 uses the first fixing member 310 to load the load along the length direction of the second restraint arm 330 to the leaf spring 900, so that the leaf spring 900 is subjected to a variety of forces in different directions and sizes during actual movement, further simulating and improving the force conditions at both ends of the leaf spring 900 during the operation of the axle of the actual vehicle, realizing a comprehensive simulation of the motion trajectory and force conditions of the leaf spring 900 under actual working conditions, and improving the accuracy of the entire system in testing the leaf spring 900.

[0053] See also Figure 5 、 Figure 6 and Figure 7 In this embodiment, the first restraining arm 320 , the second restraining arm 330 and the first fixing member 310 constitute a double rocker mechanism.

[0054] It is easy to understand that when the leaf spring 900 is subjected to a vertical load and elastically deforms upward, the movement of the first fixing member 310 on the loading mechanism 200 is constrained by both the first constraining arm 320 and the second constraining arm 330 .

[0055] When the loading mechanism 200 drives the end of the leaf spring 900 on the first fixing member 310 to bend and deform upward, it will also drive the first constraint arm 320 and the second constraint arm 330 to swing in the same direction around the rotation connection point with the base frame 100 through the first fixing member 310; at the same time, the loading mechanism 200 as a whole will swing around the rotation connection point with the base frame 100 under the constraint of the first constraint arm 320 and the second constraint arm 330. At this time, the movement trajectory of the first constraint arm 320, the second constraint arm 330 and the first fixing member 310 is roughly consistent with the movement trajectory of the double rocker mechanism.

[0056] Obviously, this system accurately simulates the force and movement of the leaf spring 900 under actual working conditions through the loading mechanism 200 and the constraint guide mechanism 300, so that the force condition and movement trajectory of the leaf spring 900 are basically consistent with the actual working conditions, thereby improving the accuracy of the leaf spring 900 test.

[0057] In addition, it should be understood that in this embodiment, by rotatably setting the first fixing member 310 on the loading mechanism 200, it is possible to ensure that the first fixing member 310 has rotational freedom on the loading mechanism 200, thereby preventing the first fixing member 310 from getting stuck in the loading mechanism 200 during movement and affecting the normal rotation of the first restraint arm 320 and the second restraint arm 330.

[0058] In addition, see Figure 7 In order to ensure the flexibility and smoothness of the relative movement of the first fixing member 310, the first restraint arm 320 and the second restraint arm 330, the first restraint arm 320 and the second restraint arm 330 are both connected to the first fixing member 310 in a hinged form, further improving the accuracy of the leaf spring 900 test.

[0059] See Figure 5 、 Figure 6 and Figure 7 In some embodiments of the present application, the first restraint arm 320 and the second restraint arm 330 are respectively located at the upper and lower parts of the leaf spring 900. The first restraint arm 320 includes two connecting sections at an angle to each other. One end of each connecting section is rotatably connected to the base frame 100, and the other end of each connecting section is connected to the first fixing member 310.

[0060] Specifically, the two connecting segments that comprise the first restraining arm 320 are integrally formed, forming a V-shape. The angle formed by the two connecting segments can be acute, right, or obtuse, with no limitation on the size. First restraining arms 320 of varying sizes can be selected based on actual testing requirements. One end of the two connecting segments is hinged to corresponding positions on the base frame 100 via corresponding hinged supports. The other ends of the two connecting segments overlap and can be hinged or fixedly connected to the first fixing member 310. The second restraining arm 330 is I-shaped. One end of the second restraining arm 330 is hinged to a corresponding position on the base 100, while the other end can be directly connected to the first fixing member 310 or hinged via corresponding hinged supports.

[0061] In the initial state, the connection points of the first restraint arm 320 and the second restraint arm 330 with the first fixing member 310 are on the same vertical line, and the hinge points of the first restraint arm 320 and the second restraint arm 330 with the base frame 100 are also on the same vertical line. The two first restraint arms 320 of the two restraint guide mechanisms 300 are combined into a parallelogram in space, and the two second restraint arms 330 are combined into a straight line in space. Through the above design, the force conditions and movement trajectory of the first fixing member 310 and the leaf spring 900 under actual vehicle working conditions can be accurately simulated.

[0062] It should be understood that during the test of the leaf spring 900 by the entire system, both ends of the leaf spring 900 are subjected to the load of the corresponding loading mechanism 200 and are bent and deformed upward. The first restraint arm 320 is arranged on the upper part of the leaf spring 900 and is designed into a structure with two sections at an angle to each other, which can provide sufficient movement space for the upward bending deformation of the leaf spring 900. It not only ensures the indirect restraint function of the first restraint arm 320 on the leaf spring 900, but also avoids the first restraint arm 320 interfering with the movement of the leaf spring 900, further improving the accuracy of the leaf spring 900 test.

[0063] See Figure 1 、 Figure 4 and Figure 5 The loading mechanism 200 includes a linear driving member 210 and a mounting seat 220 . The upper end of the linear driving member 210 is rotatably mounted on the base 100 . The output end of the linear driving member 210 is connected to the mounting seat 220 . The first fixing member 310 is rotatably mounted on the mounting seat 220 .

[0064] It should be noted that the linear drive 210 can be a power component such as a hydraulic cylinder, telescopic cylinder, or linear actuator, preferably a linear actuator. In this case, the linear drive 210 uses a real vehicle road load spectrum to achieve power output. The upper end of the linear drive 210 is connected to the upper end of the base frame 100 via a spherical bearing. The lower end of the linear drive 210 is the output end, driving the mounting base 220 and the first fixing member 310 located on the mounting base 220 to move upward or downward.

[0065] In some embodiments, the first fixing member 310 is installed on the mounting seat 220 through the first rotating shaft (600). The mounting seat 220 is preferably in an inverted U-shape, which facilitates the first fixing member 310 to be rotated and installed on the mounting seat 220 through the first rotating shaft 600, while providing sufficient installation space for the end of the leaf spring 900, which is conducive to the installation of the leaf spring 900 before testing.

[0066] Furthermore, in some embodiments, the first fixing member 310 is an adjustable fixture adapted to the thickness of the leaf spring 900. For example, if the first fixing member 310 is a clamp, it can accommodate leaf springs 900 of various thicknesses. The method by which the first fixing member 310 secures the end of the leaf spring 900 is consistent with the method used in actual vehicles to secure the axle fixture to the end of the leaf spring 900, thereby improving the consistency of the entire test system.

[0067] See Figure 4 、 Figure 5 、 Figure 7A second fixing member 400 is provided at the mounting position. The second fixing member 400 is rotatably mounted on the base frame 100, and the middle portion of the leaf spring 900 is fixed to the second fixing member 400. A bushing 800 is provided between the second fixing member 400 and the second rotating shaft 700. The bushing 800 is preferably a rubber bushing, which provides elastic cushioning for the second fixing member 400 and the leaf spring 900 during rotation around the connection point with the base frame 100. This not only highly simulates the assembly environment of the leaf spring 900 in an actual vehicle, but also ensures the stability of the leaf spring 900's movement.

[0068] In addition, by fixing the middle part of the leaf spring 900 to the second fixing member 400, the leaf spring 900 is prevented from sliding in the front-to-back direction, ensuring that the connection point of the middle part of the leaf spring 900 relative to the base frame 100 does not change, eliminating the displacement error of the middle part of the leaf spring 900, and allowing the leaf spring 900 to move only under the load constraints of the loading mechanism 200 and the constraint guide mechanism 300 in a manner consistent with the actual vehicle working conditions, further improving the accuracy of the entire system in testing the leaf spring 900.

[0069] In this embodiment, the second fixing member 400 is mounted on the base frame 100 via the second rotating shaft 700, and the corresponding two first restraining arms 320 in the two restraining guide mechanisms 300 are symmetrically distributed with respect to the second rotating shaft 700. It is easy to understand that in the initial state, the second rotating shaft 700 is located slightly below the leaf spring 900 and is substantially perpendicular to the leaf spring 900. The provision of the second rotating shaft 700 effectively simulates the balance suspension axis in an actual vehicle, further ensuring that the assembly state of the leaf spring 900 is consistent with that of an actual vehicle, thereby simulating the motion condition of the leaf spring 900 rotating about the balance suspension axis of an actual vehicle. At the same time, by arranging the two first restraining arms 320 symmetrically with respect to the second rotating shaft 700, the assembly state of the leaf spring 900 is further ensured to be consistent with that of an actual vehicle, thereby improving the accuracy of testing the leaf spring 900.

[0070] See Figure 7 and Figure 8Specifically, in one embodiment, the second fixing member 400 includes a cover plate 410 positioned in the middle of the leaf spring 900 and a spring seat 420 fixed to the second rotating shaft 700. Two supports for rotatably mounting the ends of the second rotating shaft 700 are provided at opposite ends of the base frame 100. The spring seat 420 is positioned in the middle of the second rotating shaft 700. The cover plate 410 is secured to the spring seat 420 via U-bolts 500, thereby connecting the middle of the leaf spring 900 to the second rotating shaft 700. In this embodiment, the spring seat 420 is preferably a detachable elastic clamp for easy assembly and disassembly, while also indirectly providing elastic cushioning for the leaf spring 900 during actual movement. A rubber bushing 800 is positioned between the spring seat 420 and the second rotating shaft 700, further providing elastic cushioning. This configuration allows for a more comprehensive simulation of the assembly conditions of the leaf spring 900 in a real vehicle, better simulating the stress conditions and motion trajectory of the leaf spring 900, and improving the accuracy of testing the leaf spring 900.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A leaf spring bench test system, characterized in that: include: The base frame is provided with a mounting position for rotating and mounting the leaf spring; Two loading mechanisms are rotatably disposed at both ends of the base frame, and are used to apply vertical loads to both ends of the leaf spring respectively; Two constraint guide mechanisms correspond one-to-one to the loading mechanism. The constraint guide mechanism includes a first fixing member and a first constraint arm. The first fixing member is rotatably set on the loading mechanism and is used to fix one end of the leaf spring. One end of the first constraint arm is connected to the first fixing member, and the other end is rotatably connected to the base frame.

2. The leaf spring bench test system according to claim 1, characterized in that: The constraint guide mechanism also includes a second constraint arm, one end of the second constraint arm is connected to the first fixing member, the other end of the second constraint arm is rotatably connected to the base frame, and the first constraint arm and the second constraint arm are spaced apart relative to the leaf spring.

3. The leaf spring bench test system according to claim 2, characterized in that: The first restraining arm, the second restraining arm and the first fixing member form a double rocker mechanism.

4. The leaf spring bench test system according to claim 2, characterized in that: The first restraint arm and the second restraint arm are respectively located at the upper and lower parts of the leaf spring. The first restraint arm includes two connecting sections at an angle to each other. One end of each connecting section is rotatably connected to the base frame, and the other end of each connecting section is connected to the first fixing member.

5. The leaf spring bench test system according to claim 1, characterized in that: The loading mechanism includes a linear drive member and a mounting seat. The upper end of the linear drive member is rotatably mounted on the base frame. The output end of the linear drive member is connected to the mounting seat. The first fixing member is rotatably mounted on the mounting seat.

6. The leaf spring bench test system according to claim 5, characterized in that: The first fixing member is mounted on the mounting seat via a first rotating shaft (600).

7. The leaf spring bench test system according to any one of claims 1 to 6, characterized in that: The mounting position is provided with a second fixing member, the second fixing member is rotatably mounted on the base frame, and the middle portion of the leaf spring is fixed to the second fixing member.

8. The leaf spring bench test system according to claim 7, characterized in that: The second fixing member is mounted on the base frame via a second rotating shaft, and the corresponding two first constraint arms in the two constraint guide mechanisms are symmetrically distributed relative to the second rotating shaft.

9. The leaf spring bench test system according to claim 8, characterized in that: A bushing is provided between the second fixing member and the second rotating shaft.

10. The leaf spring bench test system according to any one of claims 1 to 6, characterized in that: The first fixing member is an adjustable clamp adapted to the thickness of the leaf spring.

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