Test fixture

Abstract

The utility model provides a kind of test tool, for being connected with damping assembly, damping assembly includes damping component, first connecting part and second connecting part, first connecting part and second connecting part are connected respectively at the both sides of damping component, test tool includes: first fixed frame, first fixed frame is used to be connected with first connecting part, and at least part of first fixed frame is pasted with the first end surface of damping component;Second fixed frame, second fixed frame is used to be connected with second connecting part, and at least part of second fixed frame is pasted with the second end surface of damping component;Wherein, first fixed frame and / or second fixed frame are movably arranged along vertical direction, to extrude damping component, to test the compression performance of damping component.The present application solves the problem that rubber shock absorber in the prior art cannot be fixed during testing, resulting in a large difference between the testing process and actual working conditions, reducing the testing accuracy of rubber shock absorber.

Description

Technical Field

[0001] This utility model relates to the field of rubber shock absorber performance testing technology, and more specifically, to a testing fixture. Background Technology

[0002] In the development of construction machinery products, the vibration problem of the cab is receiving increasing attention from consumers, directly affecting driving comfort and overall vehicle reliability. Rubber shock absorbers, as an important damping element, are widely used between the cab and the frame to absorb and attenuate vibrations caused by uneven roads or during driving. In practical applications, cab shock absorbers typically employ a "dumbbell-shaped" design, with rubber pads at both ends and a metal core in the middle, secured to the frame and cab by bolts.

[0003] To ensure the optimal performance of rubber shock absorbers, their performance is tested before actual application. Most existing testing methods involve simply squeezing the rubber shock absorber back and forth until the rubber is damaged, and then counting the number of times the pressure plate squeezes the shock absorber rubber to determine the fatigue resistance of the shock absorber rubber; or the judgment is based on whether the shock absorber pad has been soaked in corrosive liquid, resulting in whether the force required for the same deformation is the same.

[0004] However, in the above test scheme, the rubber shock absorber cannot be fixed, resulting in a large difference between the test in the laboratory and the actual working conditions. It is impossible to effectively obtain the actual stress and deformation of the rubber pad, which affects the optimization process of the rubber shock absorber. Utility Model Content

[0005] The main purpose of this utility model is to provide a testing fixture to solve the problem that the rubber shock absorber cannot be fixed during the testing process in the prior art, which leads to a large difference between the testing process and the actual working conditions, and reduces the testing accuracy of the rubber shock absorber.

[0006] To achieve the above objectives, according to one aspect of the present invention, a testing fixture is provided for connection to a vibration damping component. The vibration damping component includes a vibration damping part, a first connecting part, and a second connecting part, which are respectively connected to both sides of the vibration damping part. The testing fixture includes: a first fixing frame for connection to the first connecting part, at least a portion of which is in contact with a first end face of the vibration damping part; and a second fixing frame for connection to the second connecting part, at least a portion of which is in contact with a second end face of the vibration damping part. The first fixing frame and / or the second fixing frame are movably arranged in a vertical direction to compress the vibration damping part to test its compressive performance.

[0007] Furthermore, the first fixing frame includes: a first clamping plate located above the vibration damping component, at least a portion of the first clamping plate being connected to the first connecting portion, the first clamping plate having a first clamping surface, the first clamping surface being in contact with the first end face.

[0008] Furthermore, the first fixing frame also includes: a first support plate, which is opposite to and spaced apart from the first clamping plate; a first support member, the two ends of which are respectively connected to the first support plate and the first clamping plate, and a first operating space is provided between the first clamping plate and the first support plate, through which the first connecting part is connected to the first clamping plate; there are multiple first support members, which are spaced apart along the circumferential direction of the first support plate.

[0009] Furthermore, the first connecting part includes a first locking member, which passes through the vibration damping member and connects to the second connecting part; a first through hole is provided on the first clamping plate, and at least a portion of the first locking member passes through the first through hole.

[0010] Furthermore, the vibration damping assembly also includes a gasket, which is fitted onto the first locking member, and at least a portion of the gasket is in contact with the side of the first clamping plate away from the first clamping surface.

[0011] Furthermore, the first fixing frame also includes a first docking part disposed on the first support plate, the first docking part being used to dock with the driving device to drive the first support plate and the first clamping plate to move.

[0012] Furthermore, the second fixing frame includes: a second clamping plate located below the vibration damping component, at least a portion of the second clamping plate being connected to the second connecting portion, the second clamping plate having a second clamping surface, the second clamping surface being in contact with the second end face.

[0013] Furthermore, the second connecting part includes a limiting member located below the vibration damping member, and a second through hole is provided on the second clamping plate, with at least a portion of the limiting member passing through the second through hole.

[0014] Furthermore, the limiting component is provided with a stepped structure, and at least a portion of the side of the second clamping plate away from the second clamping surface is in contact with the stepped end face of the stepped structure so that the second clamping plate is connected to the second connecting part.

[0015] Furthermore, the second fixing frame also includes: a second support plate, which is disposed opposite to and spaced apart from the second clamping plate; a second support member, the two ends of which are respectively connected to the second clamping plate and the second support plate, a second operating space is provided between the second support plate and the second clamping plate, and at least a portion of the second connecting part is located within the second operating space; there are multiple second support members, which are spaced apart along the circumferential direction of the second clamping plate.

[0016] Applying the technical solution of this utility model, the test fixture includes a first fixed frame and a second fixed frame. The first fixed frame is used to connect with the first connecting part, and at least a portion of the first fixed frame is in contact with the first end face of the vibration damping component. The second fixed frame is used to connect with the second connecting part, and at least a portion of the second fixed frame is in contact with the second end face of the vibration damping component. The first fixed frame and / or the second fixed frame are movably arranged in the vertical direction to compress the vibration damping component in order to test the compression performance of the vibration damping component.

[0017] The first mounting bracket is designed to connect with the first connection portion of the shock absorber, ensuring a tight fit between the first end face and the shock absorber during testing to simulate the contact state between the shock absorber and the cab or frame during actual assembly. The mobility of the first mounting bracket allows for precise control of the vertical force applied to the damping component during testing, thereby enabling accurate measurement of dynamic stiffness.

[0018] The second fixing bracket is used to connect to the second connecting part of the shock absorber, and at least partially abuts against the second end face of the vibration damping component. The movable design of the second fixing bracket allows for compression of the other end of the vibration damping component, ensuring symmetrical force distribution during testing and further improving the accuracy and reliability of the test.

[0019] To accurately test the dynamic-to-static stiffness ratio and fatigue performance of the vibration damping components, the first and second fixed frames are movably mounted vertically. This design allows the test fixture to simulate the working state of the vibration damper under different compression rates and frequencies. By precisely controlling the moving speed and spacing, the compressive deformation of the vibration damping components and the corresponding force values ​​can be accurately recorded, thereby calculating the dynamic-to-static stiffness ratio and evaluating fatigue performance. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 A schematic diagram of an embodiment of the test fixture according to the present invention is shown;

[0022] Figure 2 An assembly diagram of the test fixture and vibration damping components according to the present invention is shown;

[0023] Figure 3 An assembly cross-sectional view of the test fixture and vibration damping assembly according to the present invention is shown;

[0024] Figure 4 A structural schematic diagram of the vibration damping component according to the present invention is shown.

[0025] The above figures include the following reference numerals:

[0026] 100. Vibration damping assembly; 110. Vibration damping component; 111. First end face; 112. Second end face; 120. First connecting part; 121. First locking element; 130. Second connecting part; 131. Limiting element; 132. Stepped structure; 140. Gasket; 150. Second locking element;

[0027] 200, First fixing frame; 210, First clamping plate; 211, First clamping surface; 212, First through hole; 220, First support plate; 230, First support member; 240, First operating space; 250, First docking part;

[0028] 300, Second fixing frame; 310, Second clamping plate; 311, Second clamping surface; 312, Second through hole; 320, Second support plate; 330, Second support member; 340, Second operating space; 350, Second docking part. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] As mentioned in the background section, rubber shock absorbers are currently commonly installed between the vehicle's cab and frame. Rubber, due to its unique viscoelasticity, is widely used as a damping material. Rubber shock absorbers, made by combining rubber with a frame material (such as metal or fiber), are an effective method for reducing vibration. The key performance characteristics of shock absorbers are their dynamic-to-static stiffness ratio and fatigue life. The damping mechanism is vibration absorption; therefore, a lower dynamic-to-static stiffness ratio is better. Increasing static stiffness increases the static support capacity of the rubber shock absorber; decreasing dynamic stiffness reduces the vibration transmission rate, preventing vibration from being transmitted to the cab. Furthermore, rubber shock absorbers are often subjected to large static or alternating loads in daily applications; therefore, they must be able to withstand large deformations without permanent deformation and failure, i.e., have a long fatigue life. In practical applications, evaluating the damping effect and fatigue life of shock absorbers requires a very long time. While the physical properties of rubber materials, such as hardness, tensile strength, and compression set, can be accurately measured in the laboratory, testing the dynamic and static stiffness and fatigue performance of shock absorbers of specific sizes is often difficult and requires auxiliary tooling. Developing a convenient and effective laboratory testing fixture for shock absorbers, tailored to their actual operating conditions, to confirm their dynamic and static stiffness and fatigue life, and to quickly screen rubber material formulations, has become a major challenge in shock absorber product development. Most existing testing fixtures for rubber shock absorbers simply involve reciprocating compression of the rubber, failing to control the compression amount and accurately reflect the changes in dynamic and static stiffness and fatigue characteristics of the shock absorber under actual operating conditions, thus reducing testing accuracy. Therefore, to address the aforementioned technical problems, the testing fixture provided in this application includes a first fixing frame 200 and a second fixing frame 300. The first fixing frame 200 is used to connect with the first connecting part 120, and at least a portion of the first fixing frame 200 is in contact with the first end face 111 of the vibration damping component 110. The second fixing frame 300 is used to connect with the second connecting part 130, and at least a portion of the second fixing frame 300 is in contact with the second end face 112 of the vibration damping component 110. The first fixing frame 200 and / or the second fixing frame 300 are movably arranged in the vertical direction to compress the vibration damping component 110, thereby testing the compression performance of the vibration damping component 110. The movable design of the first fixing frame 200 and the second fixing frame 300 fully considers the actual working state of the cab rubber shock absorber, allowing for precise control of the compression amount of the vibration damping component 110, ensuring consistency between the test conditions and actual working conditions, and improving the accuracy of the test.

[0031] Please refer to Figures 1 to 4This application provides a testing fixture for connecting to a vibration damping assembly 100. The vibration damping assembly 100 includes a vibration damping component 110, a first connecting portion 120, and a second connecting portion 130. The first connecting portion 120 and the second connecting portion 130 are respectively connected to both sides of the vibration damping component 110. The testing fixture includes: a first fixing frame 200, which is used to connect to the first connecting portion 120, and at least a portion of the first fixing frame 200 is in contact with the first end face 111 of the vibration damping component 110; and a second fixing frame 300, which is used to connect to the second connecting portion 130, and at least a portion of the second fixing frame 300 is in contact with the second end face 112 of the vibration damping component 110. The first fixing frame 200 and / or the second fixing frame 300 are movably arranged in the vertical direction to compress the vibration damping component 110 to test the compression performance of the vibration damping component 110.

[0032] The first mounting bracket 200 is designed to connect with the first connection portion 120 of the shock absorber, ensuring a tight fit of the first end face 111 during testing to simulate the contact state of the shock absorber with the cab or frame in actual assembly. The mobility of the first mounting bracket 200 allows for precise control of the vertical force applied to the damping component 110 during testing, thereby enabling accurate measurement of dynamic stiffness.

[0033] The second fixing bracket 300 is used to connect to the second connecting portion 130 of the shock absorber, and at least partially abuts against the second end face 112 of the vibration damping component 110. The movable design of the second fixing bracket 300 allows for compression of the other end of the vibration damping component 110, ensuring symmetrical force distribution during testing and further improving the accuracy and reliability of the test.

[0034] To accurately test the dynamic-to-static stiffness ratio and fatigue performance of the vibration damping component 110, the first fixed frame 200 and the second fixed frame 300 are movably arranged in the vertical direction. This design allows the test fixture to simulate the working state of the vibration damper under different compression rates and frequencies. By precisely controlling the moving speed and spacing, the compressive deformation and corresponding force values ​​of the vibration damping component 110 can be accurately recorded, thereby calculating the dynamic-to-static stiffness ratio and evaluating fatigue performance.

[0035] In practical operation, the testing fixture is connected to external force application equipment such as the MTS testing machine. First, the rubber shock absorber to be tested is fixed by the first fixing frame 200 and the second fixing frame 300 to ensure its stability during the testing process.

[0036] Then, force is applied gradually or cyclically to control the compression process of the damping component 110. By recording the relationship between force and displacement, the dynamic stiffness and static stiffness of the damper are calculated, and thus the dynamic-to-static stiffness ratio is obtained.

[0037] Furthermore, by setting different force values, frequencies, and rates, the fatigue life of rubber materials can be quickly evaluated under laboratory conditions, which greatly shortens the testing cycle and reduces testing costs compared to real-vehicle testing.

[0038] Specifically, such as Figures 1 to 3 As shown, the first fixing frame 200 includes: a first clamping plate 210, located above the vibration damping component 110, at least a portion of the first clamping plate 210 is connected to the first connecting portion 120, the first clamping plate 210 has a first clamping surface 211, and the first clamping surface 211 is in contact with the first end face 111.

[0039] The first mounting bracket 200 of this application includes a first clamping plate 210, which is designed to connect to the first connecting portion 120 of the shock absorber and to fit tightly against the first end face 111 of the damping component 110. The fitting design of the first clamping surface 211 ensures uniform force distribution on the upper end face of the damping component 110 during testing, which helps the shock absorber to remain in its designed state during testing, ensuring the accuracy and reliability of the test. The movable nature of the first clamping plate 210 allows it to apply or release pressure in the vertical direction, thereby precisely controlling the compression of the damping component 110 and achieving accurate measurement of dynamic stiffness.

[0040] The fit design of the first clamping surface 211 and the first end surface 111 ensures that the force distribution during the test is consistent with the force distribution of the shock absorber in the cab and frame assembly state, which more realistically simulates the working state in the actual use environment and makes the test results more reliable.

[0041] Furthermore, the first fixing frame 200 also includes: a first support plate 220, which is opposite to and spaced apart from the first clamping plate 210; a first support member 230, the two ends of which are respectively connected to the first support plate 220 and the first clamping plate 210, and a first operating space 240 is provided between the first clamping plate 210 and the first support plate 220, through which the first connecting part 120 is connected to the first clamping plate 210; there are multiple first support members 230, and the multiple first support members 230 are spaced apart along the circumferential direction of the first support plate 220.

[0042] By setting the first support plate 220 and the first clamping plate 210, a stable structural frame is formed, which can effectively support the first connecting part 120 of the shock absorber, ensuring that the shock absorber can maintain a stable position during the test and avoid unnecessary swaying or displacement due to external force, thereby improving the stability of the test process and the reliability of the test data.

[0043] The design of the first operating space 240 allows the operator to precisely connect the first connecting part 120 to the first clamping plate 210. Simultaneously, the support of the first support member 230 ensures that the applied force is always vertical, avoiding the influence of lateral or oblique forces on the test results. In this way, the testing fixture can more precisely control the compression of the shock absorber, thereby accurately measuring its dynamic stiffness and fatigue performance.

[0044] The uniform distribution of multiple first support members 230 along the circumference ensures uniform force distribution between the first clamping plate 210 and the first support plate 220, avoiding excessive local force. This helps to more accurately measure the force value change of the vibration damping component 110 under different compression amounts, thereby improving the accuracy of the dynamic-static stiffness ratio test.

[0045] The first operating space 240 not only facilitates the connection between the first connecting part 120 and the first clamping plate 210, but also facilitates the necessary adjustment or maintenance of the shock absorber during the test without disassembling the entire tooling, thus improving the convenience and efficiency of the test.

[0046] The first connecting portion 120 includes a first locking member 121, which passes through the vibration damping member 110 and connects to the second connecting portion 130. The first clamping plate 210 is provided with a first through hole 212, and at least a portion of the first locking member 121 passes through the first through hole 212. The first locking member 121 is a stud.

[0047] The first locking member 121 passes through the damping component 110 and connects to the second connecting part 130, forming a robust fastening structure. This design ensures that both ends of the shock absorber can be stably fixed to the fixture during testing.

[0048] By using the cooperation between the first locking member 121 and the first through hole 212, the shock absorber and the test fixture can be quickly connected and separated, which greatly simplifies the preparation before the test and the cleaning process after the test, and improves work efficiency.

[0049] In the specific implementation process, the vibration damping component 100 also includes a gasket 140, which is sleeved on the first locking member 121, and at least a portion of the gasket 140 is in contact with the side of the first clamping plate 210 away from the first clamping surface 211.

[0050] The fit between the gasket 140 and the first clamping plate 210 increases the contact area between the first locking member 121 and the first clamping plate 210, thereby improving the stability of the contact surface, ensuring the uniform distribution of force during the test, and avoiding material damage or test result distortion caused by excessive local pressure at the contact point.

[0051] The first fixing frame 200 further includes a first docking part 250, which is disposed on the first support plate 220. The first docking part 250 is used to dock with the driving device to drive the first support plate 220 and the first clamping plate 210 to move.

[0052] The first mating part 250 is a mating hole that connects to the driving device. In the embodiment provided in this application, the driving device is an MTS testing machine.

[0053] The first docking part 250 of the first fixed frame 200 can directly dock with the MTS testing machine or other driving equipment, realizing the precise transmission of force between the testing fixture and the equipment. This direct drive control ensures that the magnitude, speed, frequency and direction of the force can be monitored and adjusted in real time during the test, which meets the requirements of actual working conditions, thereby obtaining highly reliable and accurate test data.

[0054] In the embodiments provided in this application, the second fixing frame 300 includes: a second clamping plate 310 located below the vibration damping member 110, at least a portion of the second clamping plate 310 being connected to the second connecting portion 130, the second clamping plate 310 having a second clamping surface 311, the second clamping surface 311 being in contact with the second end face 112.

[0055] The second clamping plate 310 is connected to the second connecting portion 130 of the vibration damping component 110, and the fit between its second clamping surface 311 and the second end face 112 ensures the precise positioning of the shock absorber during the test. This design avoids test errors caused by positional deviation and improves the reliability of the test results.

[0056] The contact between the second clamping surface 311 and the second end surface 112 ensures that the force applied to the second fixing frame 300 is evenly transmitted to the damping component 110. This is particularly important for evaluating the dynamic-to-static stiffness ratio of the damper, as the uniform force distribution helps to obtain more accurate test data.

[0057] The use of the second clamping plate 310 increases the surface area in contact with the damping component 110, disperses the point of force application, reduces local stress concentration, and thus effectively protects the integrity and stability of the damper material during the test process, avoiding material damage from affecting the test results.

[0058] The second connecting part 130 includes a limiting member 131, which is located below the vibration damping member 110. The second clamping plate 310 is provided with a second through hole 312, and at least a portion of the limiting member 131 passes through the second through hole 312.

[0059] When the limiting component 131 passes through the second through hole 312 and is in contact with the second clamping plate 310, it can directly guide and limit the force transmission path, ensuring that the force acts on the vibration damping component 110 in a predetermined direction and magnitude, thus avoiding force deflection or diffusion.

[0060] The design of the limiting component 131 and the second clamping plate 310 helps to evenly distribute the force acting on the vibration damping component 110, avoiding material damage that may be caused by local overload. This protective measure ensures the integrity of the sample in each test, thereby guaranteeing the validity and consistency of the test results.

[0061] The second through hole 312 and the limiting component 131 cooperate to simplify the installation and disassembly process of the vibration damping component 110, making the test operation simpler and faster, reducing the preparation time and manpower cost before the test, and improving the test efficiency.

[0062] The limiting component 131 is provided with a stepped structure 132. At least a portion of the side of the second clamping plate 310 away from the second clamping surface 311 is in contact with the stepped end face of the stepped structure 132 so that the second clamping plate 310 is connected to the second connecting part 130.

[0063] The second clamping plate 310 fits tightly against the stepped structure 132 of the limiting component 131, ensuring the precise positioning of the vibration damping component 110 on the test platform. This robust connection reduces any unnecessary displacement or vibration during testing, guaranteeing the accuracy of the test and the reliability of the results.

[0064] This design allows the second clamping plate 310 to fit tightly against the lower end of the damping component 110, enabling a more realistic simulation of the assembly state of the damping component in actual applications. In particular, this accurate simulation is crucial for evaluating the performance of the damper under various operating conditions when conducting dynamic-to-static stiffness ratio and fatigue performance tests.

[0065] In the specific implementation process, after the first locking member 121 passes through the vibration damping member 110 and the limiting member 131, it is threadedly connected to the second locking member 150 and locked together. The limiting member 131 limits the travel of the vibration damping member 110 in its radial direction.

[0066] The second fixing frame 300 further includes: a second support plate 320, which is disposed opposite to and spaced apart from the second clamping plate 310; a second support member 330, the two ends of which are respectively connected to the second clamping plate 310 and the second support plate 320, a second operating space 340 is provided between the second support plate 320 and the second clamping plate 310, and at least a portion of the second connecting part 130 is located within the second operating space 340; there are multiple second support members 330, which are spaced apart along the circumferential direction of the second clamping plate 310.

[0067] The second through hole 312 on the second clamping plate 310 fits tightly with the stepped structure 132 on the limiting component 131, ensuring precise positioning and stable support of the vibration damping component during testing. This design facilitates uniform force transmission, avoids test errors caused by displacement of the vibration damping component, and improves the reliability and accuracy of test results.

[0068] The second support member 330 not only enhances the overall structural rigidity of the second fixing frame 300, but also ensures precise control and transmission of force. The connection between the second support member 330 and the second clamping plate 310 and the second support plate 320 allows the force applied from the MTS testing machine or other driving equipment to act directly and uniformly on the vibration damping component 110, improving testing accuracy and effectiveness.

[0069] The existence of the second operating space 340 provides sufficient space for testing operations, facilitating the mutual locking between the second locking member 150 and the first locking member 121.

[0070] The second support plate 320 is provided with a second docking part 350, which is used to dock with the drive device.

[0071] The second docking section 350 on the second support plate 320 is designed to allow the drive device to connect to the test fixture quickly and accurately. This design simplifies the equipment docking procedure before testing, reduces docking time, and ensures accurate force transmission, thereby improving testing efficiency and data reliability.

[0072] The vibration damping component 100 applicable to the test fixture of this application includes a vibration damping component 110, a first connecting part 120 and a second connecting part 130. During vehicle operation, the vibration damping component 110 plays the main role in vibration damping. The vibration damping component 110 is made of rubber, and the limiting component 131 is also made of rubber. The limiting component 131 is used to limit the travel of the vibration damping component 110 in the horizontal direction.

[0073] The test fixture of this application includes two cage-type supports, namely a first fixed frame 200 and a second fixed frame 300. Each support includes a support plate, several support members disposed on the surface of the support plate, and a clamping plate. It also includes several standard bolt rods, nuts, and metal washers.

[0074] The support plate has a small hole in the middle for connection to equipment such as the MTS, and several support holes around its perimeter. It receives external forces and applies them to the support components.

[0075] The support component, with a threaded end, mates with a fastening bolt cap to secure and connect the support plate and the clamping plate. It receives the force transmitted from the support plate and transfers it to the clamping plate. The support components are evenly distributed between the clamping plate and the support plate.

[0076] The clamping plate has holes in the middle and around the edges. Several holes around the edges allow the support to pass through, and the hole in the middle is for the rubber pad core to pass through. The clamping plate contacts the upper rubber pad (vibration damping component 110) and applies force to the upper rubber pad.

[0077] Standard bolts, standard nuts, and metal washers are used to secure the shock absorber to the clamping plates of the upper and lower brackets.

[0078] A schematic diagram of a cage-type support frame is provided. The number of support components can be adjusted to facilitate the installation and removal of the shock absorber.

[0079] The cage-type support system allows for assembly that simulates the actual shock absorber assembly process. After the MTS testing machine is connected to two cage-type supports, the same force (static load) as in actual operation is applied. Then, assembly equipment such as a wrench is used to tighten the bolt caps at the lower end of the shock absorber, achieving the same assembly method as the actual shock absorber. This assembly mode ensures consistency between laboratory and actual assembly. Once the MTS testing machine is started, the shock absorber can undergo fatigue testing and dynamic stiffness testing of the rubber pad under conditions similar to reality, such as a certain force or displacement, a certain frequency, and a certain speed.

[0080] Test fixture assembly: The small holes at the top and bottom can be connected to the MTS testing machine. The vertical force of the MTS testing machine is directly transmitted to the rubber pad through two cages.

[0081] After connecting the MTS testing machine to the two cage-type supports, directly tighten the bolt caps at the lower end of the shock absorber. This ensures that the deformation of the rubber pads on it is the same as the actual deformation, allowing for slow application of stress, such as 5 mm / min, and recording of the stress-strain curve. This mode can measure the static stiffness of the shock absorber.

[0082] The testing fixture described in this application, a bracket that can be connected to an MTS testing machine, simulates the stress and deformation of the rubber pads and their fatigue performance under actual assembly and working conditions of a driver's cab shock absorber. This solves the problem that known experimental fixtures often have significantly different testing conditions from actual working conditions, making them unsuitable for guiding the development of shock absorber rubber materials. Through the application of this bracket, key parameters such as dynamic and static stiffness and fatigue life of different rubber materials in corresponding shock absorber products can be accurately tested in the laboratory, greatly shortening the development time and improving the effectiveness of shock absorber products.

[0083] In addition, the structure is simple in design, easy to process, and quick to load and unload, and can be used for dumbbell-shaped shock absorbers such as cab shock absorbers.

[0084] In a specific implementation, after laboratory testing using this support, rubber materials A and B showed that formulation A had lower dynamic and static stiffness and a longer fatigue life than formulation B. Real-vehicle testing of shock absorbers using both materials revealed that shock absorbers using formulation A exhibited less vibration in the cab and had a longer lifespan. The laboratory data showed a high degree of agreement with actual results. Compared to real-vehicle testing, laboratory testing is faster and less costly, effectively guiding the development of rubber materials for shock absorber products.

[0085] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0086] The first mounting bracket 200 is designed to connect with the first connection portion 120 of the shock absorber, ensuring a tight fit of the first end face 111 during testing to simulate the contact state of the shock absorber with the cab or frame in actual assembly. The mobility of the first mounting bracket 200 allows for precise control of the vertical force applied to the damping component 110 during testing, thereby enabling accurate measurement of dynamic stiffness.

[0087] The second fixing bracket 300 is used to connect to the second connecting portion 130 of the shock absorber, and at least partially abuts against the second end face 112 of the vibration damping component 110. The movable design of the second fixing bracket 300 allows for compression of the other end of the vibration damping component 110, ensuring symmetrical force distribution during testing and further improving the accuracy and reliability of the test.

[0088] To accurately test the dynamic-to-static stiffness ratio and fatigue performance of the vibration damping component 110, the first fixed frame 200 and the second fixed frame 300 are movably arranged in the vertical direction. This design allows the test fixture to simulate the working state of the vibration damper under different compression rates and frequencies. By precisely controlling the moving speed and spacing, the compressive deformation and corresponding force values ​​of the vibration damping component 110 can be accurately recorded, thereby calculating the dynamic-to-static stiffness ratio and evaluating fatigue performance.

[0089] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0090] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0091] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0092] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0093] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A test fixture for connecting to a vibration damping assembly (100), the vibration damping assembly (100) comprising a vibration damping component (110), a first connecting portion (120), and a second connecting portion (130), the first connecting portion (120) and the second connecting portion (130) being respectively connected to both sides of the vibration damping component (110), characterized in that, The test fixture includes: A first fixing bracket (200) is used to connect with the first connecting part (120), and at least a portion of the first fixing bracket (200) is in contact with the first end face (111) of the vibration damping component (110); The second fixing bracket (300) is used to connect with the second connecting part (130), and at least a portion of the second fixing bracket (300) is in contact with the second end face (112) of the vibration damping member (110); The first fixing frame (200) and / or the second fixing frame (300) are movably arranged in the vertical direction to compress the vibration damping component (110) to test the compression performance of the vibration damping component (110).

2. The test fixture according to claim 1, characterized in that, The first fixing frame (200) includes: A first clamping plate (210) is located above the vibration damping component (110). At least a portion of the first clamping plate (210) is connected to the first connecting portion (120). The first clamping plate (210) has a first clamping surface (211) that is in contact with the first end face (111).

3. The testing fixture according to claim 2, characterized in that, The first fixing frame (200) further includes: The first support plate (220) is opposite to and spaced apart from the first clamping plate (210); A first support member (230) has two ends connected to a first support plate (220) and a first clamping plate (210) respectively. A first operating space (240) is provided between the first clamping plate (210) and the first support plate (220). The first connecting part (120) is connected to the first clamping plate (210) through the first operating space (240). There are multiple first support members (230), and the multiple first support members (230) are spaced apart along the circumferential direction of the first support plate (220).

4. The testing fixture according to claim 2, characterized in that, The first connecting part (120) includes a first locking member (121), which passes through the vibration damping member (110) and connects to the second connecting part (130); The first clamping plate (210) is provided with a first through hole (212), and at least a portion of the first locking member (121) passes through the first through hole (212).

5. The testing fixture according to claim 4, characterized in that, The vibration damping assembly (100) further includes a gasket (140) which is sleeved on the first locking member (121) and at least a portion of the gasket (140) is in contact with the side of the first clamping plate (210) away from the first clamping surface (211).

6. The test fixture according to claim 3, characterized in that, The first fixing frame (200) further includes: A first docking part (250) is disposed on the first support plate (220). The first docking part (250) is used to dock with a driving device to drive the first support plate (220) and the first clamping plate (210) to move.

7. The test fixture according to claim 1, characterized in that, The second fixing bracket (300) includes: The second clamping plate (310) is located below the vibration damping component (110). At least a portion of the second clamping plate (310) is connected to the second connecting portion (130). The second clamping plate (310) has a second clamping surface (311) that is in contact with the second end face (112).

8. The test fixture according to claim 7, characterized in that, The second connecting part (130) includes a limiting member (131) located below the vibration damping member (110). The second clamping plate (310) is provided with a second through hole (312), and at least a portion of the limiting member (131) passes through the second through hole (312).

9. The test fixture according to claim 8, characterized in that, The limiting component (131) is provided with a stepped structure (132), and at least a portion of the side of the second clamping plate (310) away from the second clamping surface (311) is in contact with the stepped end face of the stepped structure (132) so that the second clamping plate (310) is connected to the second connecting part (130).

10. The test fixture according to claim 7, characterized in that, The second mounting bracket (300) also includes: The second support plate (320) is disposed opposite to and spaced apart from the second clamping plate (310); The second support member (330) has two ends connected to the second clamping plate (310) and the second support plate (320) respectively. A second operating space (340) is provided between the second support plate (320) and the second clamping plate (310). At least a portion of the second connecting part (130) is located in the second operating space (340). There are multiple second support members (330), and the multiple second support members (330) are spaced apart along the circumferential direction of the second clamping plate (310).

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