Testing device for automobile shock absorber

Abstract

The utility model relates to the technical field of shock absorber testing devices, and discloses a testing device for an automobile shock absorber, which comprises a base platform, a load sensor is fixedly connected to the center of the upper surface of the base platform, a guide stand column is fixedly connected to the upper surface of the base platform, and a cross beam is inserted into the outer side of the guide stand column. The upper surface of the cross beam is fixedly connected with an actuator, the bottom output end of the actuator penetrates through the cross beam, and the bottom output end of the actuator is fixedly connected with a cross tool. According to the utility model, through the cooperation of the load sensor, the cross beam, the actuator and the cross tool, the durability test and the road spectrum iteration test of the superposed waves of four shock absorbers distributed in a cross manner or two shock absorbers at opposite angles can be completed at the same time; meanwhile, the durability test of the large-tonnage single shock absorber can be completed or the related performance test can be achieved by adopting the middle station, the durability test and the performance test can be completed at the same time, the test cost is saved, and the construction period is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorber testing devices, in particular to a testing device for automobile shock absorbers. Background Art

[0002] As a key component of the automobile suspension system, automobile shock absorbers are an important part of the chassis system. Their performance is directly related to the comfort, operability and driving stability of the vehicle. The safety, reliability and durability of shock absorbers are increasingly valued by major automobile companies. It is particularly important to conduct rigorous testing and performance evaluation of automobile shock absorbers. By simulating various loads, vibrations and fatigue conditions through test equipment, engineers can identify potential structural problems, predict the life of components, evaluate the performance of materials, and improve the design to improve overall performance, which helps to reduce failures, improve safety, and ensure that the vehicle performs well under various driving conditions, thereby providing drivers and passengers with a better driving experience.

[0003] Existing test devices for automobile shock absorbers basically adopt a one-line distributed method, that is, several specimens are installed on a long tool at the same time to achieve simultaneous testing of multiple shock absorbers, improve test efficiency and save test time.

[0004] However, when testing shock absorbers using existing testing devices, the durability and performance tests need to be performed separately on different devices. When performing multiple tests on the same shock absorber, the shock absorber needs to be constantly installed, disassembled, and moved, which increases the testing cost, reduces the testing efficiency, and lengthens the testing cycle. Therefore, a testing device for automobile shock absorbers is proposed to solve the above problems. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a testing device for automobile shock absorbers, which aims to improve the problem in the prior art that the durability and performance tests of the shock absorbers need to be performed separately on different devices, resulting in increased testing costs, reduced testing efficiency and longer testing cycles.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a testing device for automobile shock absorbers, comprising a base platform, a load sensor is fixedly connected to the center of the upper surface of the base platform, a guide column is fixedly connected to the upper surface of the base platform, a cross beam is inserted into the outer side of the guide column, an actuator is fixedly connected to the upper surface of the cross beam, the bottom output end of the actuator passes through the cross beam, the bottom output end of the actuator is fixedly connected to a cross tooling, and the four outer ends of the cross tooling are all provided with limiting grooves.

[0007] As a further description of the above technical solution:

[0008] A U-shaped fixing frame is fixedly connected to the bottom center of the cross tooling, and a transverse bolt is provided on the left side of the U-shaped fixing frame.

[0009] As a further description of the above technical solution:

[0010] The right end of the transverse bolt passes through the U-shaped fixing frame, and the transverse bolt and the U-shaped fixing frame are threadedly connected.

[0011] As a further description of the above technical solution:

[0012] A circular plate is fixedly connected to the upper surface of the cross tooling, a screw head is provided above the circular plate, a screw rod is fixedly connected to the bottom surface of the screw head, and a limiting ring is fixedly connected to the outer bottom of the screw head.

[0013] As a further description of the above technical solution:

[0014] The upper surface of the circular plate is fixedly connected with a vertical pole, and the top end of the vertical pole is fixedly connected with a limiting plate.

[0015] As a further description of the above technical solution:

[0016] The bottom end of the screw rod passes through the circular plate, and the screw rod and the circular plate are threadedly connected.

[0017] As a further description of the above technical solution:

[0018] The limiting plate is located above the limiting ring.

[0019] As a further description of the above technical solution:

[0020] There are four circular plates, which are respectively located directly above the limiting grooves on the four ends of the cross tooling.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the present invention, by cooperating with the load sensor, crossbeam, actuator and cross tooling, the durability test and road spectrum iteration test of the superimposed wave of four cross-distributed shock absorbers or two diagonal shock absorbers can be completed simultaneously. The multi-station test saves test time. At the same time, the intermediate station can also be used to complete the durability test of a large-tonnage single shock absorber or to achieve related performance tests. Both durability and performance tests can be completed simultaneously on one testing machine, saving test costs and construction period.

[0023] 2. In the present invention, by cooperating with the provided circular plate, screw head, screw rod, limiting ring, vertical rod and limiting plate, the shock absorber installed in the limiting groove at the end of the cross tooling can be quickly fixed, and the staff can be reminded of the disassembly progress of the shock absorber in time to complete the disassembly of the shock absorber, thereby improving the loading and unloading efficiency. At the same time, the risk of the screw being lost due to the screw detaching from the circular plate can be avoided, which is inconvenient for continued use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of a testing device for automobile shock absorbers proposed in the present invention;

[0025] Figure 2 This is a schematic diagram of a cross fixture for a vehicle shock absorber testing device proposed in the present invention;

[0026] Figure 3 The utility model is a schematic diagram of a circular plate, a screw head, a screw rod, a limiting ring, a vertical rod and a limiting plate of a testing device for an automobile shock absorber.

[0027] Legend:

[0028] 1. Base platform; 2. Load sensor; 3. Guide column; 4. Crossbeam; 5. Actuator; 6. Cross fixture; 7. Limit slot; 8. U-shaped fixing bracket; 9. Horizontal bolt; 10. Round plate; 11. Screw head; 12. Screw; 13. Limit ring; 14. Vertical pole; 15. Limit plate. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Reference Figure 1The utility model provides an embodiment of a test device for automobile shock absorbers, comprising a base platform 1, a load sensor 2 fixedly connected to the center of the upper surface of the base platform 1, the number of load sensors 2 being five, the positions of the five load sensors 2 corresponding to the four ends and the center of the cross tool 6 respectively, a guide column 3 fixedly connected to the upper surface of the base platform 1, a crossbeam 4 plugged into the outer side of the guide column 3, a hydraulic locker is provided inside the crossbeam 4, and when the crossbeam 4 moves to the desired position on the guide column 3, it can be locked by the hydraulic locker. The crossbeam 4 can be quickly fixed to adapt to shock absorbers of different heights, thereby improving the adaptability of the device. The upper surface of the crossbeam 4 is fixedly connected to the actuator 5, and the bottom output end of the actuator 5 passes through the crossbeam 4. The bottom output end of the actuator 5 is fixedly connected to the cross tooling 6. When the actuator 5 is started, it can drive the cross tooling 6 below to perform linear motion in the up and down directions. The shock absorber is loaded through the actuator 5 and is used for durability testing and performance testing of automobile shock absorbers. The actuator 5 can be controlled by the test software to complete the sine wave and superposition wave testing methods.

[0031] Reference Figure 2 The four outer ends of the cross tooling 6 are all provided with limiting grooves 7. The ends of the automobile shock absorber can be installed into the limiting grooves 7, and the shock absorber can be quickly fixed by bolts. A U-shaped fixing frame 8 is fixedly connected to the bottom center of the cross tooling 6. A transverse bolt 9 is provided on the left side of the U-shaped fixing frame 8. The right end of the transverse bolt 9 passes through the U-shaped fixing frame 8. The transverse bolt 9 is threadedly connected to the U-shaped fixing frame 8. When the shock absorber needs to be performance tested, the shock absorber can be installed inside the U-shaped fixing frame 8 and fixed by the transverse bolt 9. The durability test of a large-tonnage single shock absorber can be completed or related performance tests can be achieved, including dynamometer test, cavitation test, and gas force / friction test.

[0032] During the durability test, the shock absorber can be installed in the four limit slots 7 at the four corners of the cross fixture 6 and the two diagonal positions; during the performance test, the shock absorber can be installed in the U-shaped fixing frame 8 under the cross fixture 6. The performance curve is drawn through the displacement of the actuator 5 and the intermediate load sensor 2, and the basic performance of the shock absorber is analyzed through the curve.

[0033] Reference Figure 3The upper surface of the cross tool 6 is fixedly connected with a circular plate 10, and the number of the circular plates 10 is four. The four circular plates 10 are respectively located above the limit grooves 7 on the four ends of the cross tool 6. A screw head 11 is provided above the circular plate 10, and the bottom surface of the screw head 11 is fixedly connected with a screw rod 12. The bottom end of the screw rod 12 passes through the circular plate 10, and the screw rod 12 is threadedly connected to the circular plate 10. When the screw head 11 rotates, the screw rod 12 can rotate synchronously. At this time, the screw rod 12 can perform linear motion in the up and down directions relative to the circular plate 10. The outer bottom of the screw head 11 is fixedly connected to the limit ring 13. When the screw head 11 moves, the limit ring 13 moves synchronously. A screw groove is provided at the end of the shock absorber that is adapted to the screw rod 12. After the shock absorber is placed into the interior of the limit groove 7, the screw head 11 can be screwed to drive the screw rod 12 to rotate downward, so that the screw 12 is threadedly fixed to the end of the shock absorber, and the installation of the shock absorber is quickly completed.

[0034] When the limit ring 13 moves upward and fits with the limit plate 15, the screw rod 12 completely leaves the shock absorber and moves to the bottom surface to fit with the bottom surface of the circular plate 10. At this time, the limit plate 15 will limit the screw head 11, so that the screw head 11 cannot rotate upward, avoiding the risk of the screw rod 12 being lost due to excessive twisting of the screw head 11, which is caused by the screw rod 12 being separated from the circular plate 10 and the loss of the screw 12. At the same time, it is inconvenient to continue using it, and the moving position of the limit ring 13 can be used to remind the staff in time to complete the disassembly of the shock absorber after the fixation of the shock absorber is released, thereby improving the loading and unloading efficiency.

[0035] Working principle: After adjusting the crossbeam 4 to the appropriate position on the guide column 3 according to the height of the shock absorber, the crossbeam 4 is quickly fixed by the hydraulic locker. During the durability test, the shock absorber can be installed in the limit slots 7 on the four stations at the four corners of the cross fixture 6 or the two stations at the diagonal angles. Then, the screw head 11 is turned to drive the screw 12 to move down and enter the screw hole at the end of the shock absorber, so that the installation of the shock absorber can be quickly completed. During the performance test, the shock absorber can be installed in the U-shaped fixing bracket 8 at the bottom of the cross fixture 6 and quickly fixed by the transverse bolt 9. After the installation is completed, the bottom end of the shock absorber will contact and fit with the load sensor 2, and then the actuator 5 is controlled to move to the shock absorber test zero position. The actuator 5 test command is set on the external controller (not directly shown in the figure), and the cross fixture 6 at the bottom of the actuator 5 is controlled to expand and contract to evenly load the shock absorber. The performance curve is drawn through the displacement data on the actuator 5 and the load data on the platform to analyze the working performance and durability characteristics of the shock absorber.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A test device for automobile shock absorbers, comprising a base platform (1), characterized in that: A load sensor (2) is fixedly connected to the center of the upper surface of the base platform (1), a guide column (3) is fixedly connected to the upper surface of the base platform (1), a crossbeam (4) is inserted into the outer side of the guide column (3), an actuator (5) is fixedly connected to the upper surface of the crossbeam (4), the bottom output end of the actuator (5) passes through the crossbeam (4), the bottom output end of the actuator (5) is fixedly connected to a cross tool (6), and the four outer ends of the cross tool (6) are all provided with limiting grooves (7).

2. The automobile shock absorber testing device according to claim 1, characterized in that: A U-shaped fixing frame (8) is fixedly connected to the bottom center of the cross tooling (6), and a transverse bolt (9) is provided on the left side of the U-shaped fixing frame (8).

3. The automobile shock absorber testing device according to claim 2, characterized in that: The right end of the transverse bolt (9) passes through the U-shaped fixing frame (8), and the transverse bolt (9) and the U-shaped fixing frame (8) are threadedly connected.

4. The automobile shock absorber testing device according to claim 1, characterized in that: A circular plate (10) is fixedly connected to the upper surface of the cross tool (6), a screw head (11) is provided above the circular plate (10), a screw rod (12) is fixedly connected to the bottom surface of the screw head (11), and a limiting ring (13) is fixedly connected to the outer bottom of the screw head (11).

5. The automobile shock absorber testing device according to claim 4, characterized in that: The upper surface of the circular plate (10) is fixedly connected to a vertical rod (14), and the top end of the vertical rod (14) is fixedly connected to a limiting plate (15).

6. The automobile shock absorber testing device according to claim 4, characterized in that: The bottom end of the screw rod (12) passes through the circular plate (10), and the screw rod (12) and the circular plate (10) are threadedly connected.

7. The automobile shock absorber testing device according to claim 5, characterized in that: The limiting plate (15) is located above the limiting ring (13).

8. The automobile shock absorber testing device according to claim 4, characterized in that: There are four circular plates (10), and the four circular plates (10) are respectively located directly above the limiting grooves (7) on the four ends of the cross tooling (6).

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