Universal test bench for axle fatigue test

Abstract

The utility model discloses a universal test bench for axle fatigue test, which belongs to the field of axle test equipment and comprises an upper support assembly, a lower support assembly and an axle mounting seat. The upper support assembly comprises an upper support main body, and a vertical loading hydraulic cylinder for applying a vertical load to the axle is arranged on the upper support main body; the lower support assembly is fixedly connected with the upper support assembly, and the lower support assembly comprises a gantry bridge frame; the axle mounting seat is used for being mounted below a gantry bridge frame, the axle mounting seat comprises a rigid bridge mounting seat for mounting a test rigid bridge and a swing bridge mounting seat for mounting a test swing bridge, and the rigid bridge mounting seat and the swing bridge mounting seat have the same connecting port with the gantry bridge frame. According to the invention, a real stress condition can be simulated relatively truly, and different types of axle tests can be carried out.

Description

Technical Field

[0001] The utility model relates to the field of axle test equipment, in particular to a general test bench for axle fatigue test. Background Art

[0002] At present, most of the existing axle test benches or test devices install or clamp the axle on the set support seats, generally directly placing the axle above the support seats. However, in construction machinery, the axle is generally installed under the frame. The axle installation method in the existing axle test devices is inconsistent with the actual situation, and it is difficult to truly simulate the actual force condition of the axle, resulting in inaccurate test results for tests related to the force on the axle.

[0003] Most of the current axle test devices are for the same type of axle. For example, it is difficult to conduct a swing axle test on a device that can conduct a rigid axle test, or it is difficult to conduct a wheel side reducer test, and they are not universal.

[0004] Therefore, it is necessary to design a general axle test installation support that can simulate the actual installation situation of the axle, which can simultaneously conduct rigid axle, swing axle, and wheel side reducer tests of different tonnages, realize the universality of the axle test device, and improve the test efficiency. Content of the Utility Model

[0005] The utility model provides a general test bench for axle fatigue test to solve the technical problem that the existing axle test bench cannot simulate the actual installation situation of the axle.

[0006] According to one aspect of the utility model, a general test bench for axle fatigue test is provided, which includes an upper support assembly, a lower support assembly, and an axle mounting seat; the upper support assembly includes an upper support body, and a vertical loading hydraulic cylinder for applying a vertical load to the axle is arranged on the upper support body; the lower support assembly is fixedly connected to the upper support assembly, and the lower support assembly includes a gantry bridge frame; the axle mounting seat is used to be installed under the gantry bridge frame, and the axle mounting seat includes a rigid axle mounting seat for installing a test rigid axle and a swing axle mounting seat for installing a test swing axle, and the interfaces of the rigid axle mounting seat and the swing axle mounting seat connected to the gantry bridge frame are the same.

[0007] Optionally, the axle mounting seat further includes a wheel side reducer mounting seat for installing a test wheel side reducer, and a hydraulic motor for driving the test wheel side reducer is arranged on the wheel side reducer mounting seat.

[0008] Optionally, at least two gantry bridge frames are arranged in parallel, and a gantry connection seat is connected between adjacent gantry bridge frames, and the gantry connection seat is provided with multiple length specifications.

[0009] Optionally, an armrest is provided on the top of the upper support body.

[0010] Optionally, a hydraulic cylinder mounting plate is fixedly connected to the end of the vertical loading hydraulic cylinder body. A waist-shaped hole is provided in the hydraulic cylinder mounting plate along the length direction of the axle. A connecting bolt for threaded connection with the upper support body is passed through the waist-shaped hole.

[0011] Optionally, a plurality of threaded holes for cooperating with the connecting bolts are arranged along the length direction of the axle on the top of the upper support body.

[0012] Optionally, connecting plates are correspondingly provided at the bottom of the upper support body and the top of the gantry bridge. A waist-shaped groove is provided in the connecting plate of the support body along the length direction of the axle. A plurality of threaded holes are distributed in the connecting plate of the gantry bridge along the length direction of the axle.

[0013] Optionally, the gantry bridge includes two vertical rectangular cylinders and a horizontal rectangular cylinder. A mounting platform for the axle mounting seat is fixedly connected to the lower part of the horizontal rectangular cylinder. The mounting platform is bolted to the axle mounting seat.

[0014] Optionally, two vertical loading hydraulic cylinders are arranged in parallel on the upper support body.

[0015] Optionally, the general test bench for axle fatigue test further includes an iron flat plate, and the lower support assembly is fixedly installed on the iron flat plate.

[0016] In summary, the present application includes at least one of the following beneficial technical effects:

[0017] 1. By installing the axle below, the forces borne by the vehicle during actual driving can be more realistically simulated, thus significantly improving the test accuracy. This installation method enables the axle to better simulate the actual force-bearing situation during the test, ensuring the accuracy and reliability of the test data. In this way, researchers and engineers can obtain test results closer to the actual use situation, further optimizing the design and performance of the vehicle;

[0018] 2. Through refined configuration on the gantry bridge system, a variety of customized axle mounting seats can be installed to meet the installation requirements of different types of axle tests. These mounting seats cover a wide range of axle types, such as rigid axles, swing axles, and advanced wheel side reducer axles, making the gantry bridge highly adaptable and compatible during vehicle R & D and testing. Such a design also improves the usage efficiency of the gantry bridge;

[0019] 3. By providing waist-shaped holes and corresponding multiple threaded holes, the length of the lower support assembly and the position of the vertical loading hydraulic cylinder can be adjusted, and it can be adjusted according to different axle lengths.

[0020] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages. The following will refer to the drawings to further elaborate on the utility model in detail. Brief Description of the Drawings

[0021] The drawings forming a part of this application are used to provide a further understanding of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an improper limitation to the utility model. In the drawings:

[0022] Figure 1 is the general assembly drawing of a universal test bench for axle fatigue test in the specific embodiment of the utility model.

[0023] Figure 2 is the schematic diagram of the upper support assembly in the specific embodiment of the utility model.

[0024] Figure 3 is the schematic diagram of the lower support assembly for rigid axle test in the specific embodiment of the utility model.

[0025] Figure 4 is the schematic diagram of the lower support assembly for swing axle test in the specific embodiment of the utility model.

[0026] Figure 5 is the schematic diagram of the lower support assembly for wheel side reducer test in the specific embodiment of the utility model.

[0027] Legend Explanation:

[0028] 1. Upper support assembly; 11. Handrail; 12. Vertical loading hydraulic cylinder; 13. Hydraulic cylinder mounting plate; 14. Upper support body; 2. Lower support assembly; 21. Gantry bridge; 22. Gantry connection seat; 23. Rigid axle mounting seat; 24. Test rigid axle; 25. Swing axle mounting seat; 26. Test swing axle; 27. Wheel side reducer mounting seat; 28. Hydraulic motor; 29. Test wheel side reducer; 3. Iron flat plate. Detailed Description of the Embodiment

[0029] The following will elaborate on the embodiments of the utility model in detail with reference to the drawings. However, the utility model can be implemented in many different ways defined and covered by the following.

[0030] The following will further elaborate on this application with reference to the Figures 1-5 drawings to further elaborate on this application in detail.

[0031] The embodiment of this application discloses a universal test bench for axle fatigue test.

[0032] Refer to Figure 1, A general test bench for axle fatigue tests includes an upper support assembly 1, a lower support assembly 2, and an axle mounting seat. The upper support assembly 1 includes an upper support body 14, and a vertical loading hydraulic cylinder 12 for applying a vertical load to the axle is provided on the upper support body 14. The lower support assembly 2 is fixedly connected to the upper support assembly. The lower support assembly 2 includes a gantry bridge 21. The axle mounting seat is used to be mounted below the gantry bridge 21. The axle mounting seat includes a rigid bridge mounting seat 23 for mounting a test rigid bridge 24 and a swing bridge mounting seat 25 for mounting a test swing bridge 26. The interfaces of the rigid bridge mounting seat 23 and the swing bridge mounting seat 25 connected to the gantry bridge 21 are the same.

[0033] The upper support assembly 1 is the key load-bearing part of the entire test bench. It includes the upper support body 14 and the vertical loading hydraulic cylinder 12. Its function is to apply a vertical load to the axle to simulate the vertical pressure borne by the axle during the actual use of the vehicle. This process is achieved through the vertical loading hydraulic cylinder 12. The hydraulic cylinder is fixed on the upper support body 14 and can apply an adjustable vertical force according to the test requirements, thus ensuring the accuracy and controllability of the test. The lower support assembly 2 is fixedly connected to the upper support assembly 1 to form a stable foundation for the test bench. It mainly includes a gantry bridge 21, which plays a role in supporting and fixing the axle. The gantry bridge 21 provides a stable mounting platform for the axle and is firmly connected to the upper support assembly 1 through a fixed connection seat, ensuring that the entire system will not displace or deform during the loading process, and ensuring the accuracy and safety of the test. The axle mounting seat is designed to mount different types of axles during the test, and its lower part is fixed on the gantry bridge 21. The function of this mounting seat is to provide an interchangeable platform, enabling different types of axles (such as rigid axles and swing axles) to be quickly and firmly mounted on the test bench. This function is achieved through two types of mounting seats - the rigid bridge mounting seat 23 and the swing bridge mounting seat 25 - which are both designed with the same interfaces and can be easily interchanged when connected to the gantry bridge 21, greatly improving the versatility and operation efficiency of the test device.

[0034] The main function of the vertical loading hydraulic cylinder 12 is to apply a vertical load to the axle to simulate the actual load borne by the axle during vehicle driving. Controlled by the hydraulic system, these hydraulic cylinders can apply forces of different magnitudes and directions to accurately simulate the force conditions of the axle under different working conditions, ensuring that the test can reflect the real usage environment. This loading method is achieved through the precise control of the hydraulic cylinder, ensuring the reliability of the test results.

[0035] The interfaces where the rigid bridge mounting seat 23 and the swing bridge mounting seat 25 are connected to the gantry bridge 21 are designed as the same standard interfaces. The function of this design is to ensure that different types of axles can be quickly replaced and installed on the same test bench without additional adjustment or adapters. This feature greatly simplifies the operation process, reduces the adjustment time, improves the test efficiency, and at the same time reduces the complexity and manufacturing cost of the test device.

[0036] Refer to Figure 2 , a handrail 11 is provided at the top of the upper support body 14. The main function of this design is to provide a safe gripping point for the operator, ensuring that when installing, adjusting or maintaining the test bench, the operator can stand or move stably, reducing the accidental risk caused by loss of balance.

[0037] Refer to Figure 3 , at least two gantry bridges 21 are arranged in parallel, and a gantry connection seat 22 is connected between adjacent gantry bridges 21. The gantry connection seat 22 is provided with multiple length specifications. The function of at least two gantry bridges is to provide a more stable and firm structural support for the test bench, ensuring that the entire system can withstand large loads and vibrations without displacement or deformation during the axle fatigue test. Adjacent gantry bridges 21 are connected by the gantry connection seat 22. The function of these connection seats is to firmly combine multiple gantry bridges 21 together to form an integral structure, further enhancing the stability of the system. In order to adapt to different sizes and types of axle tests, the gantry connection seat 22 is designed with multiple length specifications, so that the distance between the gantry bridges can be flexibly adjusted according to specific test requirements. Through this design of adjustable-length connection seats, the test bench can adapt to axles of different lengths and specifications, improving the versatility and adaptability of the test device and achieving a wider application range.

[0038] The end of the cylinder body of the vertical loading hydraulic cylinder 12 is fixedly connected with a hydraulic cylinder mounting plate 13. A waist-shaped hole is opened on the hydraulic cylinder mounting plate 13 along the length direction of the axle. A connecting bolt for threaded connection with the upper support body 14 is inserted through the waist-shaped hole. The function of this design is to provide a stable mounting base for the hydraulic cylinder, ensuring that the hydraulic cylinder can maintain accurate positioning and stable acting force during the loading process. The waist-shaped hole opened on the hydraulic cylinder mounting plate 13 along the length direction of the axle allows the hydraulic cylinder to be adjusted within a certain range to adapt to axles of different lengths. The connecting bolt for threaded connection with the upper support body 14 is inserted through the waist-shaped hole. By tightening these bolts, the hydraulic cylinder mounting plate 13 can be firmly fixed on the upper support body 14 while still retaining the flexibility to adjust the position of the hydraulic cylinder. This design realizes the compatibility of the test bench with axles of different specifications, enables the hydraulic cylinder to be accurately positioned to meet various test requirements, and ensures the stability and accuracy of the loading process.

[0039] At the top of the upper support body 14, a plurality of threaded holes for cooperating with connecting bolts are arranged along the length direction of the axle. The function of this design is to provide multiple options for the flexible positioning and fixing of the hydraulic cylinder mounting plate 13, ensuring that the hydraulic cylinder can be precisely adjusted according to the length and position requirements of different axles. By installing connecting bolts in the threaded holes at different positions, the hydraulic cylinder mounting plate 13 can be firmly fixed, while allowing the operator to adjust the position of the hydraulic cylinder in the length direction according to specific test requirements. This design with multiple threaded holes not only increases the adaptability and versatility of the test bench, but also ensures the stability and accuracy of the hydraulic cylinder under various test conditions, ensuring that the test can be carried out under optimal conditions.

[0040] At the bottom of the upper support body 14 and the top of the gantry bridge 21, connecting plates are correspondingly provided. On the connecting plate of the support body, waist-shaped slots are opened along the length direction of the axle, and a plurality of threaded holes are distributed along the length direction of the axle on the connecting plate of the gantry bridge 21. The function of this design is to provide a reliable interface for the stable connection between the two, ensuring the stability and rigidity of the overall structure of the test bench. The waist-shaped slots opened along the length direction of the axle on the connecting plate of the support body are used to allow the upper support body 14 to be adjusted within a certain range in the length direction during the installation process to adapt to axles of different lengths and different test requirements. And a plurality of threaded holes are distributed along the length direction of the axle on the connecting plate of the gantry bridge 21. These threaded holes cooperate with the waist-shaped slots, enabling the upper support body 14 to be firmly connected to the gantry bridge 21 through bolts while retaining the flexibility of position adjustment. This design realizes the height adaptability and adjustability of the test bench, ensuring that axles of different specifications can obtain precise positioning and stable support during the test, improving the accuracy of the test and the versatility of the equipment.

[0041] Refer to Figure 4 , the gantry bridge 21 includes two vertical rectangular cylinders and a horizontal rectangular cylinder. At the lower part of the horizontal rectangular cylinder, a mounting platform for the axle mounting seat is fixedly connected. The mounting platform and the axle mounting seat are connected by bolts. The horizontal rectangular cylinder connects the two vertical rectangular cylinders, playing a role in strengthening the overall structure of the bridge, and a mounting platform for the axle mounting seat is fixedly connected to its lower part. The function of this mounting platform is to provide a stable and firm mounting foundation for the axle mounting seat, ensuring that the axle maintains precise positioning during the test. The mounting platform and the axle mounting seat are connected by bolts. This connection method not only simplifies the installation and disassembly process, but also allows the axle mounting seat to be flexibly replaced or adjusted according to different test requirements, further enhancing the versatility and adaptability of the test bench.

[0042] There are two vertically loaded hydraulic cylinders 12 arranged in parallel on the upper support body 14. By arranging two hydraulic cylinders in parallel, the situation of eccentric load or uneven force application that may occur with a single hydraulic cylinder can be effectively avoided, thereby more accurately simulating the real load received by the axle of a vehicle under actual working conditions. The way this configuration is achieved is to fix the two hydraulic cylinders at the corresponding positions of the upper support body 14, ensuring that they work synchronously during loading and jointly apply a vertical force. Such a design not only improves the test accuracy and reliability but also enhances the adaptability of the test system to different types and sizes of axles, making the test results more authentic and credible.

[0043] The general test bench for axle fatigue tests further includes an iron flat plate 3, and the lower support assembly 2 is fixedly installed on the iron flat plate 3. The main function of this design is to provide a solid and stable foundation for the entire test device, ensuring that the lower support assembly 2 and other components can be firmly fixed on a flat surface during the test, thereby avoiding test errors or safety hazards caused by an unstable base. The iron flat plate 3 can withstand the high loads and vibrations generated during the test due to its hard and durable material properties.

[0044] Refer to Figure 5 , the axle mounting seat further includes a wheel side reducer mounting seat 27 for mounting the test wheel side reducer 29, and a hydraulic motor 28 for driving the test wheel side reducer 29 is provided on the wheel side reducer mounting seat 27. The function of this mounting seat is to provide a stable and accurate mounting position for the wheel side reducer so as to accurately simulate the actual working conditions during the test. In order to drive the test wheel side reducer 29, a hydraulic motor 28 is also configured on the mounting seat. The function of the hydraulic motor 28 is to provide the necessary driving force for the wheel side reducer. By controlling the output power and speed of the motor through the hydraulic system, the actual driving conditions of the vehicle under different working conditions can be accurately simulated.

[0045] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, various changes and modifications can be made to the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. Universal test bench for axle fatigue test, characterized by: It comprises an upper support assembly (1), a lower support assembly (2) and an axle mounting seat; The upper support assembly (1) comprises an upper support body (14), and a vertical loading hydraulic cylinder (12) is provided on the upper support body (14) for applying a vertical load to the axle; The lower support assembly (2) is fixedly connected to the upper support assembly, and the lower support assembly (2) includes a gantry bridge frame (21); the vehicle axle mounting seat is used to be installed below the gantry bridge frame (21), and the vehicle axle mounting seat includes a rigid bridge mounting seat (23) for mounting a test rigid bridge (24) and a swing bridge mounting seat (25) for mounting a test swing bridge, and the rigid bridge mounting seat (23) and the swing bridge mounting seat (25) have the same interface for connecting with the gantry bridge frame (21).

2. The universal test bench for axle fatigue test according to claim 1, characterized in that: The axle mounting seat also includes a wheel reducer mounting seat (27) for mounting a test wheel reducer (29), and a hydraulic motor (28) for driving the test wheel reducer (29) is arranged on the wheel reducer mounting seat (27).

3. The universal test bench for axle fatigue test according to claim 2, characterized in that: At least two gantry bridge frames (21) are arranged in parallel, and a gantry connection seat (22) is connected between adjacent gantry bridge frames (21). The gantry connection seat (22) is provided with a plurality of length specifications.

4. The universal test bench for axle fatigue test according to claim 3, characterized in that: A handrail (11) is provided on the top of the upper support body (14).

5. The universal test bench for axle fatigue test according to claim 4, characterized in that: The end of the cylinder body of the vertical loading hydraulic cylinder (12) is fixedly connected to a hydraulic cylinder mounting plate (13), and a waist-shaped hole is provided on the hydraulic cylinder mounting plate (13) along the length direction of the axle, and a connecting bolt for threaded connection with the upper support body (14) is passed through the waist-shaped hole.

6. The universal test bench for axle fatigue test according to claim 5, characterized in that: A plurality of threaded holes for cooperating with connecting bolts are arranged on the top of the upper support body (14) along the length direction of the axle.

7. The universal test bench for axle fatigue test according to claim 1, characterized in that: The bottom of the upper support body (14) and the top of the gantry bridge (21) are both provided with connecting plates correspondingly, the connecting plate of the support body is provided with waist-shaped grooves along the length direction of the axle, and the connecting plate of the gantry bridge (21) is provided with a plurality of threaded holes distributed along the length direction of the axle.

8. The universal test bench for axle fatigue test according to claim 7, characterized in that: The gantry bridge (21) comprises two vertical rectangular cylinders and a transverse rectangular cylinder, the lower part of the transverse rectangular cylinder is fixedly connected with a mounting platform for an axle mounting seat, and the mounting platform is connected to the axle mounting seat by bolts.

9. The universal test bench for axle fatigue test according to claim 1, characterized in that: Two vertical loading hydraulic cylinders (12) are arranged in parallel on the upper support body (14).

10. The universal test bench for axle fatigue test according to claim 9, characterized in that: The universal test bench for axle fatigue testing also includes an iron plate (3), and the lower support assembly (2) is fixedly mounted on the iron plate (3).

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