Vehicle plate spring fatigue testing device

Abstract

The utility model discloses a vehicle plate spring fatigue testing device, which comprises a bottom plate, two groups of sliding chutes are arranged at the upper end of the bottom plate, sliding seats are connected in the two groups of sliding chutes in a sliding manner, fixed plates are fixedly connected at the upper ends of the sliding seats, a plurality of groups of fixed shafts are fixedly connected on the outer wall of a rotating plate, sliding blocks are connected in the plurality of groups of fixed shafts in a sliding manner, and the sliding blocks are fixed on the rotating plate. An adjusting groove is formed in the upper end face of the sliding block, a clamping block is slidably connected into the adjusting groove, an elastic mechanism enabling the clamping block to reset is installed in the adjusting groove, and the upper end face of the clamping block is obliquely arranged. According to the utility model, through the arrangement of the clamping block and the spring, when the leaf spring eye slides to the fixed shaft, the clamping block can be pushed upwards by using the reset force of the spring to firmly lock the leaf spring eye and prevent the leaf spring eye from displacing or inclining in the test process, so that the problem that the leaf spring cannot be limited in the test in the background technology is effectively solved; and the test stability and accuracy are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fatigue testing, in particular to a vehicle leaf spring fatigue testing device. Background Art

[0002] Leaf springs are the most widely used elastic elements in automobile suspensions. As one of the key components of the vehicle chassis system, they are composed of several alloy spring leaves of equal width but unequal length and thickness to form an elastic beam of approximately equal strength. Their function is to connect the vehicle frame and axle in the form of a suspension. Located between the frame and the axle, they withstand the impact load of the wheels on the frame, reduce severe vibrations of the vehicle body, and maintain the vehicle's driving stability and adaptability to different road conditions.

[0003] A Chinese utility model with authorization announcement number CN113945346A discloses a leaf spring fatigue testing device. When in use, the device limits the leaf spring by hanging the leaf spring ear on the supporting horizontal shaft. However, during actual use, the leaf spring ear and the supporting horizontal shaft are in a sliding state and are not limited, so the leaf spring cannot be effectively fixed. As a result, the leaf spring will be displaced or tilted during the test, affecting the stability and accuracy of the test. Therefore, it is necessary to redesign a vehicle leaf spring fatigue testing device to address the above problems. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings in the prior art and to propose a vehicle leaf spring fatigue testing device.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A vehicle leaf spring fatigue testing device comprises a base plate, the upper end of the base plate is provided with two groups of slide grooves, the two groups of slide grooves are slidably connected to a slide seat, the upper end of the slide seat is fixedly connected to a fixed plate, the outer wall of the fixed plate is rotatably connected to a rotating plate, the upper end of the base plate is fixedly connected to a side plate, the outer wall of the side plate is L-shaped, the side plate is connected to a pressure block through a telescopic mechanism, the outer wall of the rotating plate is fixedly connected to multiple groups of fixed shafts, the multiple groups of fixed shafts are slidably connected to sliders, the upper end surface of the slider is provided with an adjustment groove, a card block is slidably connected in the adjustment groove, an elastic mechanism for resetting the card block is installed in the adjustment groove, and the upper end surface of the card block is inclined.

[0007] Preferably, the elastic mechanism includes two groups of springs fixedly connected to the bottom of the adjustment slot, and the other ends of the two groups of springs are fixedly connected to the clamping block.

[0008] Preferably, the fixed shaft is rotatably connected to a second threaded rod, the slider is threadedly connected to the threaded section of the second threaded rod, the outer walls on both sides of the slider are in contact with the inner wall of the fixed shaft, the outer wall of the fixed shaft is rotatably connected to a rotating block, and is coaxially fixedly connected to the second threaded rod.

[0009] Preferably, the telescopic mechanism comprises a hydraulic cylinder fixedly connected to the end surface of the side plate, and the telescopic end of the hydraulic cylinder is fixedly connected to the pressure block.

[0010] Preferably, the inner walls of the two groups of the slides are rotatably connected to a threaded rod 1 and are coaxially fixedly connected. The slide is threadedly connected to a threaded section of the threaded rod 1. A limiting groove is provided on the inner wall of the slide, and the edge of the slide contacts the inner wall of the limiting groove.

[0011] Preferably, a servo motor is fixedly connected to the side wall of the bottom plate, and the end of the output shaft of the servo motor is coaxially fixedly connected to the adjacent threaded rod.

[0012] The utility model has the following beneficial effects:

[0013] 1. The utility model provides a clamping block and a spring. When the leaf spring ear slides to the fixed shaft, the spring's return force is used to push the clamping block upward, thereby firmly locking the leaf spring ear and preventing it from displacement or tilting during the test. This effectively solves the problem in the background technology that the leaf spring cannot be limited during the test, thereby improving the stability and accuracy of the test.

[0014] 2. The present invention can flexibly adjust the position of the leaf spring on the fixed shaft by cooperating with the second threaded rod and the slider. By cooperating with the rotation of the first threaded rod, the spacing between the two sets of slides can be adjusted to accommodate leaf springs of different specifications and sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a vehicle leaf spring fatigue testing device proposed in the utility model;

[0016] Figure 2 for Figure 1 Schematic diagram of the structure of the middle slide, fixed plate and other components.

[0017] Figure 3 for Figure 2 Cross-sectional view of the fixed axis.

[0018] Figure 4 for Figure 3 Cross-sectional view of the middle slider.

[0019] In the figure: 1. Base plate; 2. Slide; 3. Threaded rod 1; 4. Slide; 5. Servo motor; 6. Limit slot; 7. Fixed plate; 8. Side plate; 9. Hydraulic cylinder; 10. Pressure block; 11. Rotating plate; 12. Fixed shaft; 13. Threaded rod 2; 14. Slider; 15. Rotating block; 16. Block; 17. Adjustment slot; 18. Spring. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Reference Figure 1-4 A vehicle leaf spring fatigue testing device includes a base plate 1, with two groups of slide grooves 2 provided on the upper end of the base plate 1, and slide seats 4 are slidably connected in the two groups of slide grooves 2. The upper end of the slide seat 4 is fixedly connected to a fixed plate 7, and the outer wall of the fixed plate 7 is rotatably connected to a rotating plate 11. The upper end of the base plate 1 is fixedly connected to a side plate 8, and the outer wall of the side plate 8 is L-shaped. The side plate 8 is connected to a pressure block 10 through a telescopic mechanism. The outer wall of the rotating plate 11 is fixedly connected to multiple groups of fixed shafts 12, and the multiple groups of fixed shafts 12 are slidably connected to sliders 14. The upper end surface of the slider 14 is provided with an adjusting groove 17, and a card block 16 is slidably connected in the adjusting groove 17. An elastic mechanism for resetting the card block 16 is installed in the adjusting groove 17, and the upper end surface of the card block 16 is inclined. The elastic mechanism includes two groups of springs 18 fixedly connected to the bottom of the adjusting groove 17, and the other ends of the two groups of springs 18 are fixedly connected to the card block 16;

[0022] When the leaf spring ear is hung on the outer wall of the fixed shaft 12, the leaf spring ear is pushed to slide toward the fixed plate 7. During sliding, it abuts against the block 16, pressing the block 16 downward and compressing the spring 18. When the leaf spring ear is no longer in contact with 16, the spring 18 returns to its original position, driving the block 16 to slide upward, thereby limiting the position of the leaf spring ear.

[0023] A threaded rod 13 is rotatably connected to the fixed shaft 12, and a slider 14 is threadedly connected to the threaded section of the threaded rod 13. The outer walls on both sides of the slider 14 are in contact with the inner wall of the fixed shaft 12. A rotating block 15 is rotatably connected to the outer wall of the fixed shaft 12 and is coaxially fixedly connected to the threaded rod 13. The telescopic mechanism includes a hydraulic cylinder 9 fixedly connected to the end face of the side plate 8, and the telescopic end of the hydraulic cylinder 9 is fixedly connected to the pressure block 10; the rotation of the threaded rod 13 can flexibly adjust the position of the slider 14.

[0024] The inner walls of the two groups of slides 2 are both rotatably connected to the threaded rod 3 and are coaxially fixedly connected. The slide 4 is threadedly connected to the threaded section of the threaded rod 3. A limiting groove 6 is provided on the inner wall of the slide 2. The edge of the slide 4 contacts the inner wall of the limiting groove 6. The side wall of the base plate 1 is fixedly connected to the servo motor 5. The end of the output shaft of the servo motor 5 is coaxially fixedly connected to the adjacent threaded rod 3.

[0025] When the spring is in the state of being tested, the operator can adjust the position of the slide 4 so that it is aligned with the leaf spring to be tested. After the adjustment is completed, the slide 4 is fixed in the appropriate position. The operator then pushes the leaf spring ear to slide along the outer wall of the fixed shaft 12 toward the fixed plate 7. During the sliding process, the leaf spring ear will contact the block 16, driving the block 16 to move downward and compressing the spring 18. When the leaf spring ear exceeds the block, the spring 18 will reset and push the block 16 to move upward, so that the block 16 locks the leaf spring ear to the outer wall of the fixed shaft 12, preventing the leaf spring from being displaced or tilted during the test, thereby ensuring the stable positioning of the leaf spring.

[0026] The operator can flexibly adjust the specific position of the slider 14 by rotating the threaded rod 13, thereby adjusting the specific position of the leaf spring on the fixed shaft 12 to accommodate leaf springs of different specifications and sizes.

[0027] After the leaf spring is fixed, the hydraulic cylinder 9 controls the pressure block 10 to apply pressure. The pressure applied by the pressure block 10 can be dynamically adjusted through the hydraulic system to simulate the actual usage environment. This dynamic pressure adjustment function can effectively simulate the stress conditions of the leaf spring under different load conditions, further improving the accuracy and reliability of the test.

[0028] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A vehicle leaf spring fatigue testing device, comprising a base plate (1), characterized in that: The upper end of the bottom plate (1) is provided with two groups of slide grooves (2), and the two groups of slide grooves (2) are slidably connected to a slide seat (4), the upper end of the slide seat (4) is fixedly connected to a fixed plate (7), and the outer wall of the fixed plate (7) is rotatably connected to a rotating plate (11), the upper end of the bottom plate (1) is fixedly connected to a side plate (8), the outer wall of the side plate (8) is L-shaped, and the side plate (8) is connected to a pressure block (10) through a telescopic mechanism, and the outer wall of the rotating plate (11) is fixedly connected to multiple groups of fixed shafts (12), and the multiple groups of fixed shafts (12) are slidably connected to a slider (14), the upper end surface of the slider (14) is provided with an adjustment groove (17), and a card block (16) is slidably connected in the adjustment groove (17), and an elastic mechanism for resetting the card block (16) is installed in the adjustment groove (17), and the upper end surface of the card block (16) is inclined.

2. A vehicle leaf spring fatigue testing device according to claim 1, characterized in that: The elastic mechanism comprises two groups of springs (18) fixedly connected to the bottom of the adjustment slot (17), and the other ends of the two groups of springs (18) are fixedly connected to the clamping block (16).

3. A vehicle leaf spring fatigue testing device according to claim 2, characterized in that: The fixed shaft (12) is rotatably connected to the second threaded rod (13), the slider (14) is threadedly connected to the threaded section of the second threaded rod (13), the outer walls on both sides of the slider (14) are in contact with the inner wall of the fixed shaft (12), and the outer wall of the fixed shaft (12) is rotatably connected to the rotating block (15), and is coaxially fixedly connected to the second threaded rod (13).

4. A vehicle leaf spring fatigue testing device according to claim 3, characterized in that: The telescopic mechanism comprises a hydraulic cylinder (9) fixedly connected to the end surface of the side plate (8), and the telescopic end of the hydraulic cylinder (9) is fixedly connected to the pressing block (10).

5. The vehicle leaf spring fatigue testing device according to claim 4, characterized in that: The inner walls of the two groups of the slide grooves (2) are both rotatably connected to the threaded rod (3) and are coaxially fixedly connected. The slide seat (4) is threadedly connected to the threaded section of the threaded rod (3). A limiting groove (6) is provided on the inner wall of the slide groove (2), and the edge of the slide seat (4) contacts the inner wall of the limiting groove (6).

6. The vehicle leaf spring fatigue testing device according to claim 5, characterized in that: A servo motor (5) is fixedly connected to the side wall of the bottom plate (1), and the end of the output shaft of the servo motor (5) is coaxially fixedly connected to the adjacent threaded rod (3).

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