Dynamic characteristic testing device for shock absorber

Abstract

A dynamic characteristic testing device for a shock absorber belongs to the technical field of shock absorption and comprises a supporting piece, a connecting plate and a screw rod, the shock absorber to be detected is arranged between the supporting piece and the connecting plate, the supporting piece is provided with a slide way and a slide block freely moving in the slide way, the connecting plate is provided with an adjusting groove, the upper end of the screw rod is connected to the slide block, and the lower end of the screw rod penetrates into the adjusting groove. By adjusting the movement of the slide block in the slide way and the position of the screw rod in the adjusting groove, accurate positioning of the to-be-detected shock absorber is effectively realized, the positioning is accurate, the adjustment is flexible, the adaptability is strong, the test error can be effectively reduced, and the test efficiency and the test effect are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of damping, specifically a dynamic characteristic testing device of shock absorber. BACKGROUND

[0002] The oil pressure shock absorber is a device that uses the viscous damping of liquid to consume vibration energy, thereby achieving the purpose of damping, and is an important component on modern railway vehicles such as high-speed rail, and plays an important role in the motion stability and comfort of the vehicle system, so the quality of the oil pressure shock absorber is very important, and various tests need to be carried out after the product is completed to detect its performance.

[0003] The test performance tool is a key component of the oil pressure shock absorber test link, and its performance plays a decisive role in the dynamic characteristic test of the oil pressure shock absorber, so it is of great significance to make dynamic characteristic test on the test device suitable for the oil pressure shock absorber and understand the performance and index of the oil pressure shock absorber. The test performance tool needs to ensure the following points: accuracy: the tool should be able to accurately simulate the working state of the oil pressure shock absorber in the actual vehicle, ensure the accuracy and reliability of the test results; flexibility: the tool should have adjustable test parameters to test different models and specifications of oil pressure shock absorbers to meet different needs; safety: during the test process, the tool should ensure the safety of the operator and prevent the test equipment from being damaged.

[0004] Although the existing test performance tool can test part of the performance of the oil pressure shock absorber to a certain extent, such as CN116558854 A, there is still a problem of inaccurate positioning of the tool clamp, which leads to various problems: test result deviation: inaccurate positioning of the tool clamp will cause the installation position of the oil pressure shock absorber on the test bench to deviate, thereby affecting the accuracy of the test results, for example, the measurement results of key parameters such as damping force and response time may differ significantly from the actual values; poor test repeatability: due to the inaccurate positioning of the tool clamp, the installation position of the oil pressure shock absorber may differ each time the test is performed, resulting in poor repeatability of the test results, which is not conducive to accurate evaluation and optimal design of the performance of the oil pressure shock absorber. UTILITY MODEL CONTENTS

[0005] In order to solve the problems of the prior art, the utility model provides a dynamic characteristic test device for shock absorber, which is accurate in positioning, high in universality and convenient to adjust.

[0006] The technical problem to be solved by the utility model is realized through the following technical scheme:

[0007] The utility model relates to a kind of shock absorber dynamic characteristic testing device, including support and connecting plate, connecting plate center is equipped with the mounting hole of shock absorber, the shock absorber to be measured is arranged between support and connecting plate, in the utility model, the support is C type with opening downward, transverse slide is equipped on the both sides of support, slide is opened in the lower end surface of support, slide is embedded with slider, slider is freely moved in slide, screw rod is arranged between support and connecting plate, one end of screw rod passes through slider and falls into slide, and it is resisted to slide inner wall, the other end of screw rod passes through connecting plate, and it is fixed by nut connection.

[0008] In the utility model, adjusting groove is equipped on the left and right sides of connecting plate, adjusting groove is the connecting hole of screw rod extension to the edge of connecting plate, the arrangement direction of adjusting groove is consistent with the setting direction of slide.

[0009] In the utility model, extension cylinder is equipped on the middle section of screw rod, extension cylinder is screwed with screw rod, both ends of extension cylinder are respectively resisted to the opening of support slide and connecting plate.

[0010] Further, the extension cylinder is a circular tube or a polygonal tube, the outer diameter or the diameter of the inscribed circle of the outer contour is greater than the width of the slide opening on the support, and simultaneously greater than the width of the adjusting groove.

[0011] Further, the extension cylinder is a telescopic tube, including an inner tube and an outer tube coaxially screwed, the inner tube is provided with external threads, the outer tube is provided with internal threads, and the outer diameter of the inner tube is greater than the width of the slide opening on the support, and simultaneously greater than the width of the adjusting groove.

[0012] Further, the inner tube is further provided with a tightening nut to prevent the inner tube and the outer tube from loosening.

[0013] In the utility model, the width of the slide opening is less than the width of the slide, the slider cooperates with the gap between the slide, and the slider is a long strip-shaped block that does not rotate when sliding in the slide.

[0014] Further, the lower part of the slider is embedded in the slide opening.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] After positioning the shock absorber to be measured by the connecting plate, the relative position of the connecting plate and the support is adjusted by the cooperation of the slider and the slide, thereby effectively achieving precise positioning of the shock absorber to be measured, effectively avoiding test errors caused by inaccurate positioning, improving the accuracy and reliability of test results, and the adjustment operation is simple;

[0017] The adjustment slots on the connecting plate of this application can further facilitate the precise positioning of the vibration damper under test, making the adjustment process more diverse. It can effectively and flexibly adjust according to different test requirements, ensuring that the vibration damper under test is in the best condition during the test, which is conducive to obtaining more accurate dynamic characteristic data.

[0018] This application utilizes an adjustable and replaceable extension tube length to make the distance between the connecting plate and the support adjustable, effectively adapting to the testing of different models and specifications of vibration dampers, reducing testing costs and improving testing efficiency.

[0019] Therefore, this utility model has a novel concept, ingenious design, precise positioning, flexible adjustment, and strong adaptability, which can effectively reduce experimental errors and improve experimental efficiency and results. Attached Figure Description

[0020] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0021] Figure 2 This is a side view of the structure of this utility model;

[0022] Figure 3 for Figure 1 A schematic diagram of the middle support component from below;

[0023] Figure 4 for Figure 1 A schematic diagram of the middle slider structure viewed from below;

[0024] Figure 5 for Figure 1 Top view of the connecting plate structure;

[0025] Figure 6 This is a schematic diagram of another embodiment of the present utility model.

[0026] In the diagram: 1. Support component; 2. Slider; 3. Screw hole; 4. Slide rail; 5. Extension cylinder; 6. Screw; 7. Connecting plate; 8. Mounting hole; 9. Adjustment groove; 10. Tightening nut; 51. Inner tube; 52. Outer tube; 53. Fastening nut. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific preferred embodiments, but this does not limit the scope of protection of the present invention. Example

[0028] A device for testing the dynamic characteristics of a vibration damper, such as Figure 1 and 2 As shown, the system includes a support member 1, a connecting plate 7, and a screw 6. The vibration damper to be tested is positioned between the support member 1 and the connecting plate 7. Figure 5The connecting plate 7 is centrally provided with a mounting hole 8 for the damper, and symmetrically provided with an adjusting groove 9 extending from the edge to the middle on the left and right sides of the connecting plate 7, Figure 3 The support 1 is a C-shaped structure with an opening downward, and a horizontal sliding channel 4 is formed on each side arm of the support 1 and opens at the lower end surface of the support 1. A sliding block 2 is embedded in the sliding channel 4 and freely moves along the sliding channel 4. A screw hole 3 is formed on the sliding block 2. Two screw rods 6 are respectively connected to the left and right sides of the support rod and the connecting plate 7. The upper end of the screw rod 6 penetrates into the sliding block 2 and abuts against the inner wall of the sliding channel 4. The lower segment of the screw rod 6 falls into the adjusting groove 9 of the connecting plate 7 and penetrates through the adjusting groove 9. A tightening nut 10 is arranged at the lower end of the screw rod 6.

[0029] The sliding block 2 is shown in Figure 4 Fig. 2, which is a long strip-shaped block. The upper part of the sliding block 2 is in clearance fit with the sliding channel 4, and the lower part of the sliding block 2 is in the opening of the sliding channel 4 and slides along the sliding channel 4 without rotating.

[0030] In another alternative embodiment, the sliding block 2 is in the shape of a cuboid and is in clearance fit with the sliding channel 4 as a whole.

[0031] In this embodiment, an extension cylinder 5 is sleeved on the middle segment of the screw rod 6. The extension cylinder 5 can be replaced according to the length of the damper to be detected. The extension cylinder 5 is a cylindrical tube and is threadedly connected to the screw rod 6. The upper end of the extension cylinder 5 abuts against the opening of the sliding channel 4 of the support 1, and the lower end abuts against the adjusting groove 9 of the connecting plate 7. The outer diameter of the extension cylinder 5 is greater than the width of the opening of the sliding channel 4 and also greater than the width of the adjusting groove 9, so that the extension cylinder 5 can rotate with the screw rod 6, tightly abuts against the support 1 and the connecting plate 7, and keeps the damper to be detected fastened.

[0032] In another alternative embodiment, the extension cylinder 5 is a square tube, and the diameter of the inscribed tube of the outer contour of the square tube is greater than the width of the opening of the sliding channel 4 and also greater than the width of the adjusting groove 9. Embodiment

[0033] A damper dynamic characteristic testing device includes a support 1, a connecting plate 7 and a screw rod 6. The damper to be detected is arranged between the support 1 and the connecting plate 7. The connecting plate 7 is centrally provided with a mounting hole 8 for the damper, and symmetrically provided with an adjusting groove 9 extending from the edge to the middle on the left and right sides of the connecting plate 7. The support 1 is a C-shaped structure with an opening downward. A horizontal sliding channel 4 is formed on each side arm of the support 1 and opens at the lower end surface of the support 1. A sliding block 2 is embedded in the sliding channel 4 and freely moves along the sliding channel 4. A screw hole 3 is formed on the sliding block 2. Two screw rods 6 are respectively connected to the left and right sides of the support rod and the connecting plate 7. The upper end of the screw rod 6 penetrates into the sliding block 2 and abuts against the inner wall of the sliding channel 4. The lower segment of the screw rod 6 falls into the adjusting groove 9 of the connecting plate 7 and penetrates through the adjusting groove 9. A tightening nut 10 is arranged at the lower end of the screw rod 6.

[0034] The middle section of the screw rod 6 is provided with an extension cylinder 5, such as Figure 6 Therefore, the extension cylinder 5 is a telescopic tube, which can be adjusted in length according to the length of the shock absorber to be detected, including an inner tube 51 and an outer tube 52 coaxially screwed, the inner tube 51 is provided with external threads, the outer tube 52 is provided with internal threads, the outer diameter of the inner tube 51 is greater than the width of the opening of the slide 4 and also greater than the width of the adjusting groove 9, and the inner tube 51 is further provided with a fastening nut 53, which is used to tightly connect the end face of one end of the inner tube 51 when in use, which can effectively prevent the inner tube 51 and the outer tube 52 from loosening.

[0035] The application is applied to the dynamic performance detection of oil hydraulic shock absorber. Taking example of the embodiment 1, the shock absorber to be detected is placed between the support 1 and the connecting plate 7, and is installed and fixed to the connecting plate 7 when in use, according to the specification of the shock absorber to be detected, the appropriate length of the extension cylinder 5 is selected, and the support plate, the sliding block 2, the screw rod 6, the extension cylinder 5, the connecting plate 7 and the tightening nut 10 are sequentially and loosely connected according to the connecting structure in Figure 1 , then the position of the sliding block 2 in the slide 4 and the position of the screw rod 6 in the adjusting groove 9 are adjusted according to the alignment requirement until accurate positioning, that is, the upper end of the screw rod 6 is tightly pressed against the inner wall of the slide 4, the tightening nut 10 is fastened, the two ends of the extension cylinder 5 are tightly pressed against the support 1 and the connecting plate 7, the tightening nut 10 is tightly pressed against the connecting plate 7, the fastening of the shock absorber to be detected is maintained, and then various detections can be carried out.

[0036] In summary, combined with the above structure and working process, it can be found that the shock absorber dynamic characteristic detection device proposed in the application has novel concept, ingenious design, accurate positioning, flexible adjustment, strong adaptability, can effectively reduce the test error, improve the test efficiency and test effect.

Claims

1. A dynamic characteristic testing device for a vibration damper, comprising a support member and a connecting plate, wherein the connecting plate has a mounting hole for the vibration damper at its center, and the vibration damper to be tested is disposed between the support member and the connecting plate, characterized in that: The support is a C-shaped support with an opening downward, and a transverse slide is arranged on each side arm of the support, and the slide is opened at the lower end surface of the support, and a sliding block is embedded in the slide, and the sliding block is freely movable in the slide, and a screw rod is arranged between the support and the connecting plate, one end of the screw rod passes through the sliding block and falls into the slide and abuts against the inner wall of the slide, and the other end of the screw rod passes through the connecting plate and is connected and fixed through a nut.

2. The test device of claim 1, wherein: Adjusting grooves are arranged on the left and right sides of the connecting plate, the adjusting grooves are connected holes through which the screw rod extends to the edge of the connecting plate, and the arrangement direction of the adjusting grooves is consistent with the arrangement direction of the slide.

3. The test device of claim 2, wherein: An extension cylinder is arranged on the middle section of the screw rod, the extension cylinder is threadedly connected with the screw rod, and the two ends of the extension cylinder abut against the opening of the slide of the support and the connecting plate respectively.

4. The test device of claim 3, wherein: The extension cylinder is a circular tube or a polygonal tube, and the outer diameter or the diameter of the inscribed circle of the outer contour of the extension cylinder is greater than the width of the opening of the slide on the support and greater than the width of the adjusting groove.

5. The test device of claim 3, wherein: The extension cylinder is a telescopic tube, and the extension cylinder comprises a coaxially screwed inner tube and an outer tube, the inner tube is provided with external threads, the outer tube is provided with internal threads, the outer diameter of the inner tube is greater than the width of the opening of the slide on the support and greater than the width of the adjusting groove.

6. The test device of claim 5, wherein: A fastening nut is further arranged on the inner tube.

7. The test device of claim 1, wherein: The width of the opening of the slide is less than the width of the slide, the sliding block is gap-fitted with the slide in the slide, and the sliding block is in a long strip shape.

8. The test device of claim 7, wherein: The lower part of the sliding block is embedded in the opening of the slide.

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