Four-station hydraulic fatigue test bench

Abstract

The utility model relates to the technical field of test beds, and discloses a four-station hydraulic fatigue test bed which comprises a base, four hydraulic cylinders are arranged on the inner top wall of the base, the output ends of the hydraulic cylinders penetrate through the upper side of the base, a shock absorber is arranged above the base, clamps are arranged at the two ends of the shock absorber respectively, and the two ends of the shock absorber are connected with the base. A mounting seat is slidably connected to the side wall of the clamp, air cylinders are arranged on the two sides of the mounting seat, conical blocks are fixedly arranged at the output ends of the air cylinders, the conical blocks are located in the clamp, a frame is fixedly connected to the upper side of the mounting seat, and the bottom of the frame is fixedly connected to the upper side of the base. According to the utility model, the base is used for supporting the frame and the hydraulic cylinder, and through the mounting seat, the clamp, the shock absorber, the air cylinder and the conical block, the problems that the operation complexity is increased and the test efficiency is reduced when the clamp is replaced in the traditional test bed are solved.

Description

Technical Field

[0001] This utility model relates to the field of test bench technology, and in particular to a four-station hydraulic fatigue test bench. Background Technology

[0002] In the automotive manufacturing industry, hydraulic shock absorbers are key components of vehicle suspension systems, and their performance directly affects the smoothness, safety, and comfort of vehicle operation. To ensure that hydraulic shock absorbers maintain reliable performance during long-term use, they must undergo rigorous fatigue performance testing. This testing simulates the high-frequency, reciprocating loads experienced by the shock absorbers during vehicle operation, and examines indicators such as sealing performance, piston assembly durability, and fatigue life.

[0003] Vibration dampers come in various specifications. When testing different types of vibration dampers on a traditional test bench, the process involves first stopping the machine and conducting a safety inspection; then, using tools to disassemble the old fixture and cleaning the mounting area; next, selecting a new fixture according to the vibration damper specifications, installing it, and tightening it as required; finally, installing the vibration damper onto the fixture and adjusting it. This process increases the complexity of operations when changing fixtures on a traditional test bench, leading to a decrease in testing efficiency. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a four-station hydraulic fatigue testing bench, which aims to solve the problem that the traditional testing bench increases the complexity of operation and reduces the testing efficiency when changing fixtures.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a four-station hydraulic fatigue testing bench, comprising a base and a shock absorber. Four hydraulic cylinders are arranged on the inner top wall of the base, and the output ends of the hydraulic cylinders pass through the upper side of the base. A shock absorber is arranged above the base, and clamps are arranged at both ends of the shock absorber. A mounting seat is slidably connected to the side wall of the clamp. A cylinder is arranged on both sides of the mounting seat. A conical block is fixedly arranged at the output end of the cylinder. The conical block is located inside the clamp. The lower side of the mounting seat is fixedly connected to the output end of the hydraulic cylinder. A frame is fixedly connected to the upper side of the mounting seat. The bottom of the frame is fixedly connected to the upper side of the base.

[0006] Preferably, a hydraulic component is fixedly installed at one end of the hydraulic cylinder, and a hydraulic pump is fixedly installed at the end of the hydraulic component away from the hydraulic cylinder. A motor is installed on the inner bottom wall of the base, and a gearbox is fixedly installed at the output end of the motor. The output end of the gearbox is fixed to the input end of the hydraulic pump.

[0007] Preferably, a support plate is fixedly connected to the inner side wall of the base, the hydraulic pump is fixedly connected to the upper side of the support plate, the support plate is located above the motor and the gearbox, and the output end of the gearbox passes through the upper and lower sides of the support plate.

[0008] Preferably, a mounting groove is provided on one side of the mounting base, and the inner sidewall of the mounting groove is slidably connected to the sidewall of the clamp.

[0009] Preferably, the conical block is conical in shape, with the side of the conical block with the larger diameter fixedly mounted on the output end of the cylinder, and the conical block passing through the mounting base.

[0010] Preferably, the clamp has tapered grooves on both sides, and the sidewalls of the tapered block and the inner sidewalls of the tapered grooves are fitted together.

[0011] Preferably, an inspection cover is provided on one side of the base, and a shock-absorbing pad is provided on the lower side of the base.

[0012] Preferably, a control cabinet is provided on the other side of the base, and the control cabinet is electrically connected to the cylinder, hydraulic cylinder, hydraulic pump, and motor.

[0013] This utility model has the following beneficial effects:

[0014] 1. In this utility model, the base provides support for the frame and hydraulic cylinders. The four hydraulic cylinders drive the mounting base to move up and down reciprocally. Through the connection between the fixture and the mounting base, the function of simultaneously testing the fatigue performance of multiple shock absorbers at multiple workstations is realized. By using cylinders, conical blocks, fixtures and mounting bases, the problem of increased operation complexity and reduced test efficiency caused by changing fixtures in traditional test benches is solved.

[0015] 2. In this utility model, the motor is started by controlling the control cabinet, which in turn provides mechanical energy to the hydraulic pump. The hydraulic pump converts the mechanical energy into hydraulic energy, and the hydraulic cylinder is controlled by the control cabinet, thereby realizing the intelligent control function of the test bench in fatigue testing. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a four-station hydraulic fatigue testing bench proposed in this utility model.

[0017] Figure 2 This is a schematic diagram of the internal structure of the base of a four-station hydraulic fatigue testing bench proposed in this utility model.

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of the fixture for a four-station hydraulic fatigue testing bench proposed in this utility model.

[0019] Figure 4 This is a three-dimensional structural diagram of the mounting base for a four-station hydraulic fatigue testing bench proposed in this utility model.

[0020] Legend:

[0021] 1. Inspection cover; 2. Frame; 3. Cylinder; 4. Clamp; 5. Mounting base; 6. Shock absorber; 7. Control cabinet; 8. Hydraulic cylinder; 9. Base; 10. Mounting groove; 11. Shock-absorbing pad; 12. Hydraulic pump; 13. Support plate; 14. Gearbox; 15. Motor 1; 16. Hydraulic components; 17. Conical groove; 18. Conical block. Detailed Implementation

[0022] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Reference Figure 1 , Figure 2 and Figure 3 This utility model provides an embodiment of a four-station hydraulic fatigue testing bench, including a base 9 and a shock absorber 6. Four hydraulic cylinders 8 are arranged on the inner top wall of the base 9. The output end of the hydraulic cylinder 8 passes through the upper side of the base 9. The shock absorber 6 is arranged above the base 9. Both ends of the shock absorber 6 are provided with clamps 4. The side wall of the clamps 4 is slidably connected to the mounting base 5. Both sides of the mounting base 5 are provided with cylinders 3. The output end of the cylinder 3 is fixedly provided with a conical block 18. The conical block 18 is located inside the clamps 4. The lower side of the lower mounting base 5 is fixedly connected to the output end of the hydraulic cylinder 8. The upper side of the upper mounting base 5 is fixedly connected to the frame 2. The bottom of the frame 2 is fixedly connected to the upper side of the base 9.

[0024] In this embodiment, Figure 1 The front, back, left, and right are the directions. The shock absorber 6 is the device to be tested in the fatigue test, which is existing technology. The output end of the hydraulic cylinder 8 has a telescopic function, which applies a reciprocating dynamic load to the shock absorber 6 to simulate the high-frequency, reciprocating force that the shock absorber 6 bears under actual road conditions, so as to realize the test of its fatigue performance. It includes, but is not limited to, heat dissipation function, command input and output function and other equipment connection function, which is existing technology.

[0025] Specifically, when using this test bench, the base 9 provides support for the frame 2 and the hydraulic cylinder 8. Driven by the output end of the hydraulic cylinder 8, and connected to the output end of the mounting base 5, the mounting base 5 is driven to move up and down reciprocally. Through the connection between the clamp 4 and the mounting base 5, the connection between the clamp 4 and the shock absorber 6, and the connection between the mounting base 5 and the frame 2, a reciprocating dynamic load is applied to the shock absorber 6. The design of four hydraulic cylinders 8 enables the function of simultaneously testing the fatigue performance of multiple shock absorbers 6 at multiple stations.

[0026] When testing shock absorbers 6 with different or special structures, the hydraulic cylinder 8 can be stopped first. The clamp 4 used to fix shock absorbers 6 of different specifications or structures has the same connection method, size, and specifications as the mounting base 5. Driven by the output end of the cylinder 3, the conical block 18 is slid out of the clamp 4. Through the sliding connection between the clamp 4 and the mounting base 5, the clamp 4 is removed. Then, the new shock absorber 6 and the new clamp 4 are connected and fixed. The new clamp 4 is slid into the mounting base 5. Driven by the output end of the cylinder 3, the conical block 18 slides into the interior of the clamp 4 to fix the clamp 4. This completes the replacement of the clamp 4 of the test bench, thus solving the problem of increased operation complexity and reduced test efficiency when replacing the clamp 4 in traditional test benches.

[0027] Reference Figure 2 A hydraulic component 16 is fixedly installed at one end of the hydraulic cylinder 8, and a hydraulic pump 12 is fixedly installed at the end of the hydraulic component 16 away from the hydraulic cylinder 8. A motor 15 is installed on the inner bottom wall of the base 9, and a gearbox 14 is fixedly installed at the output end of the motor 15. The output end of the gearbox 14 is fixed to the input end of the hydraulic pump 12.

[0028] Specifically, hydraulic component 16 refers to all components in the hydraulic station pump except for the drive motor and pump body, including oil tank, filter, control valve, hydraulic cylinder assembly, hydraulic motor, oil pipe, pipe joint, seal, cooler and heater, etc., which is existing technology; motor 15 is a high-precision servo motor, which is existing technology; hydraulic pump 12 is used to convert mechanical energy into hydraulic energy, and a variable pump can be used, which is existing technology; gearbox 14 contains four output terminals, which is existing technology.

[0029] The base 9 provides support for the motor 15 and gearbox 14. The output of the motor 15 drives the gearbox 14 to rotate, which in turn converts mechanical energy into hydraulic energy through the hydraulic pump 12 and transmits it to the hydraulic cylinder 8 through the hydraulic component 16. This enables the four hydraulic cylinders 8 to reciprocate, thus facilitating the four-position fatigue performance testing of the shock absorber 6.

[0030] Reference Figure 2 A support plate 13 is fixedly connected to the inner wall of the base 9. The hydraulic pump 12 is fixedly connected to the upper side of the support plate 13. The support plate 13 is located above the motor 15 and the gearbox 14. The output end of the gearbox 14 passes through the upper and lower sides of the support plate 13.

[0031] Specifically, the base 9 provides support for the support plate 13, gearbox 14 and motor 15, the support plate 13 provides support for the hydraulic pump 12, and the support plate 13 divides the interior of the base 9 into upper and lower spaces, thereby improving the utilization of the interior space of the base 9 and reducing the area occupied by the test bench.

[0032] Reference Figure 1 , Figure 3 and Figure 4 The mounting base 5 has a mounting groove 10 on one side, and the inner side wall of the mounting groove 10 is slidably connected to the side wall of the clamp 4.

[0033] Specifically, when it is necessary to disassemble or install the clamp 4, the clamp 4 can be slid into the mounting groove 10 through the sliding connection between the side wall of the clamp 4 and the inner side wall of the mounting groove 10, thereby realizing the function of quick installation and disassembly of the clamp 4.

[0034] Reference Figure 4 The conical block 18 is conical in shape, and the side of the conical block 18 with a larger diameter is fixedly mounted on the output end of the cylinder 3. The conical block 18 passes through the mounting base 5.

[0035] Specifically, when disassembling the clamp 4, the conical block 18 retracts into the mounting base 5 by contracting the output end of the cylinder 3. When installing the clamp 4, the conical shape of the conical block 18 allows it to slide into the clamp 4 without needing to be perfectly aligned with it. At the same time, it can also guide the position of the clamp 4, thereby improving the ease of installation of the clamp 4.

[0036] Reference Figure 3 and Figure 4 The clamp 4 has conical grooves 17 on both sides, and the side wall of the conical block 18 fits into the inner side wall of the conical groove 17.

[0037] Specifically, the conical groove 17 is designed in a conical shape. When the conical block 18 slides into the fixture 4, the conical block 18 fixes the fixture 4 by fitting the side wall of the conical block 18 with the inner side wall of the conical groove 17, thereby preventing the fixture 4 from shaking during the test.

[0038] Reference Figure 1 A maintenance cover 1 is provided on one side of the base 9, and a shock-absorbing pad 11 is provided on the lower side of the base 9.

[0039] Specifically, the shock-absorbing pad 11 can be made of rubber, which is an existing technology; the inspection cover 1 improves the convenience of inspection and maintenance of the test bench, and the shock-absorbing pad 11 reduces the shaking of the test bench during operation, thereby helping to improve the efficiency of testing.

[0040] Reference Figure 1 , Figure 2 and Figure 4 On the other side of the base 9, there is a control cabinet 7, which is electrically connected to the cylinder 3, hydraulic cylinder 8, hydraulic pump 12, and motor 15.

[0041] Specifically, control cabinet 7 includes a programmable PLC controller and a touch screen terminal, used to control the operation of the test bench, which is existing technology. When using the test bench, motor 15 is started by controlling control cabinet 7, which in turn provides mechanical energy to hydraulic pump 12. The power of hydraulic pump 12 is controlled by control cabinet 7, which in turn controls the amount of hydraulic energy output by hydraulic pump 12. Hydraulic cylinder 8 is controlled by control cabinet 7, realizing the fatigue test function of the test bench. The drive of cylinder 3 is controlled by control cabinet 7, thereby realizing the function of quick change of fixture 4 of the test bench.

[0042] Working principle: When using this test bench, it is controlled by the control cabinet 7, and driven by the output end of the motor 15, the gearbox 14 is driven to run, which in turn provides mechanical energy to the four hydraulic pumps 12, and the hydraulic energy is transmitted to the hydraulic cylinder 8 through the hydraulic component 16, thereby realizing the function of reciprocating up and down at the output end of the hydraulic cylinder 8, thus realizing the function of simultaneously testing the fatigue performance of multiple shock absorbers 6 at multiple workstations.

[0043] When testing shock absorbers 6 with different or special structures, the hydraulic cylinder 8 is stopped by the control cabinet 7. Controlled by the control cabinet 7, the cone block 18 is driven out of the clamp 4 by the output of the cylinder 3. The clamp 4 is removed through the sliding connection between the clamp 4 and the mounting base 5. Then, the new shock absorber 6 is connected and fixed to the new clamp 4. The new clamp 4 is slid into the mounting base 5, and the cone block 18 is driven into the clamp 4 by the output of the cylinder 3, thus fixing the clamp 4. This completes the replacement of the clamp 4 on the test bench, solving the problem of increased operational complexity and reduced testing efficiency when replacing the clamp 4 on traditional test benches.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A four-station hydraulic fatigue testing bench, comprising a base (9), characterized in that: Four hydraulic cylinders (8) are provided on the inner top wall of the base (9). The output end of the hydraulic cylinder (8) passes through the upper side of the base (9). A shock absorber (6) is provided above the base (9). A clamp (4) is provided at both ends of the shock absorber (6). A mounting seat (5) is slidably connected to the side wall of the clamp (4). A cylinder (3) is provided on both sides of the mounting seat (5). A conical block (18) is fixedly provided at the output end of the cylinder (3). The conical block (18) is located inside the clamp (4). The lower side of the mounting seat (5) is fixedly connected to the output end of the hydraulic cylinder (8). A frame (2) is fixedly connected to the upper side of the mounting seat (5). The bottom of the frame (2) is fixedly connected to the upper side of the base (9).

2. The four-station hydraulic fatigue testing bench according to claim 1, characterized in that: A hydraulic component (16) is fixedly installed at one end of the hydraulic cylinder (8), and a hydraulic pump (12) is fixedly installed at the end of the hydraulic component (16) away from the hydraulic cylinder (8). A motor (15) is installed on the inner bottom wall of the base (9), and a gearbox (14) is fixedly installed at the output end of the motor (15). The output end of the gearbox (14) is fixed on the input end of the hydraulic pump (12).

3. The four-station hydraulic fatigue testing bench according to claim 2, characterized in that: A support plate (13) is fixedly connected to the inner wall of the base (9). The hydraulic pump (12) is fixedly connected to the upper side of the support plate (13). The support plate (13) is located above the motor (15) and the gearbox (14). The output end of the gearbox (14) passes through the upper and lower sides of the support plate (13).

4. The four-station hydraulic fatigue testing bench according to claim 1, characterized in that: The mounting base (5) has a mounting groove (10) on one side, and the inner wall of the mounting groove (10) is slidably connected to the side wall of the clamp (4).

5. The four-station hydraulic fatigue testing bench according to claim 1, characterized in that: The conical block (18) is conical in shape, and the side of the conical block (18) with a larger diameter is fixedly mounted on the output end of the cylinder (3). The conical block (18) passes through the mounting base (5).

6. The four-station hydraulic fatigue testing bench according to claim 1, characterized in that: The clamp (4) has conical grooves (17) on both sides, and the side wall of the conical block (18) and the inner side wall of the conical groove (17) are in contact.

7. The four-station hydraulic fatigue testing bench according to claim 1, characterized in that: A maintenance cover (1) is provided on one side of the base (9), and a shock-absorbing pad (11) is provided on the lower side of the base (9).

8. The four-station hydraulic fatigue testing bench according to claim 1, characterized in that: A control cabinet (7) is provided on the other side of the base (9). The control cabinet (7) is electrically connected to the cylinder (3), hydraulic cylinder (8), hydraulic pump (12), and motor (15).

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