Fatigue life testing device for spring of electric tail gate system

Abstract

The invention discloses a spring fatigue life testing device for an electric tail gate system, and relates to the technical field of mechanical part testing, and the spring fatigue life testing device comprises a test board and a cylinder, one end of the test board is provided with a fixed plate, and the cylinder is installed at one end, far away from the fixed plate, of the test board. The fatigue life test device comprises a test bench, a fixed plate is arranged on the test bench, a cylinder is arranged on the fixed plate, two symmetrically distributed slide rails are arranged between the fixed plate and the cylinder on the test bench, a slide carriage is connected to the two slide rails in a sliding manner, a movable end of the cylinder is connected to the slide carriage, and a vertical slide bar is connected to the slide carriage. According to the spring fatigue life testing device, the sliding sleeve is arranged on the spring, the spring is stretched at an angle, in the spring stretching process, along with continuous lifting of the sliding sleeve, the spring makes contact with the gear rod, under blocking of the gear rod, the stretched spring is bent at the gear rod, the working state of the spring in an electric tail door system is effectively simulated, and the authenticity and accuracy of spring fatigue life testing are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical component testing, and in particular to a spring fatigue life testing device for an electric tailgate system. Background Art

[0002] A spring is a mechanical part that uses elasticity to work. Parts made of elastic material deform under the action of external force and return to their original shape after the external force is removed.

[0003] Springs of the same batch need to be randomly inspected for fatigue testing after production is completed in order to determine whether the current batch of leaf springs is qualified. In the prior art, most of the springs are tested by linear stretching, and the number of times they can recover after stretching is recorded for fatigue testing. However, the springs used in the electric tailgate system will bend during the stretching process when working, so the existing fatigue testing device cannot simulate the spring environment used by the electric tailgate system, resulting in insufficient authenticity and accuracy in the spring test. Therefore, a spring fatigue life testing device for an electric tailgate system is proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art and to propose a spring fatigue life testing device for an electric tailgate system.

[0005] A spring fatigue life test device for an electric tailgate system comprises a test bench and a cylinder, wherein a fixed plate is installed at one end of the test bench, and the cylinder is installed at an end of the test bench away from the fixed plate. Two symmetrically distributed slide rails are installed on the test bench between the fixed plate and the cylinder, and a slide seat is slidably connected to the two slide rails. The movable end of the cylinder is connected to the slide seat, and a vertical slide rod is connected to the slide seat. A slide sleeve is slidably connected to the slide rod, and an angle adjustment mechanism is provided on the test bench for adjusting the angle of a spring pull rope.

[0006] Preferably, the angle adjustment mechanism includes two rotating seats, which are installed on the test bench and are respectively located on both sides of the two slide rails. Each of the rotating seats is rotatably connected to a rotating shaft, and a rotating plate is connected to the rotating shaft. Each rotating plate is provided with a sliding groove, and a slider is slidably connected to the sliding groove. The two sliders are commonly connected to a connecting rod, and the connecting rod is rotatably connected to the sliding sleeve.

[0007] Preferably, a gear is coaxially connected to one of the rotating shafts, a pair of mounting plates are installed on the test bench, a moving rod is connected between the pair of mounting plates, a moving block is slidably connected to the moving rod, a spur rack is connected to the lower end of the moving block, the spur rack is meshed with the gear, a first threaded rod is rotatably connected between the pair of mounting plates, the first threaded rod is threadedly connected to the moving block, one end of the first threaded rod passes through the mounting plate and is coaxially connected to the first rocker.

[0008] Preferably, a fixed column is installed on the test bench, and a lifting groove is opened on the side of the fixed column close to the slide rail, a lifting block is slidably connected in the lifting groove, a gear rod is connected to the outer end of the lifting block, and the upper and lower groove walls of the lifting groove are rotatably connected to a second threaded rod, the second threaded rod is connected to the lifting block by threads, and the upper end of the second threaded rod passes through the fixed column and is coaxially connected to the second rocker.

[0009] Preferably, a first mounting member is connected to a side of the fixing plate close to the cylinder, and a second mounting member is connected to a side of the sliding sleeve close to the fixing plate.

[0010] Preferably, the first mounting member and the second mounting member have the same structure and are both made of nickel-chromium alloy.

[0011] Preferably, the gear ratio between the spur rack and the gear is 1:4.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. The present invention utilizes the reciprocating extension and retraction of the cylinder to perform fatigue life test on the pull rope of the spring, and sets an angled stretching for the spring. During the spring stretching process, as the sliding sleeve is continuously lifted, the spring will come into contact with the gear lever. Under the obstruction of the gear lever, the stretched spring bends at the gear lever, which effectively simulates the working state of the spring in the electric tailgate system and ensures the authenticity and accuracy of the spring fatigue life test.

[0014] 2. During the test process of the present invention, the angle of the rotating plate can be adjusted as needed to control the change in the angle of the pull rope. At the same time, the second rocker wheel can be rotated to adjust the height of the gear lever to control the bending angle of the spring. This makes the test variables adjustable and allows fatigue life tests to be performed on springs of different models, thereby increasing the scope of use of the test device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 It is a structural schematic diagram of the present invention from another angle.

[0017] Figure 3It is a structural schematic diagram of the angle adjustment mechanism in the present invention.

[0018] Figure 4 It is a schematic structural diagram of the fixed column and the shift rod part in the present invention.

[0019] In the figure: 1 test bench, 11 fixed plate, 12 cylinder, 13 slide rail, 14 slide seat, 15 slide rod, 16 sleeve, 17 first mounting member, 18 second mounting member, 2 rotating seat, 21 rotating shaft, 22 rotating plate, 23 slide groove, 24 slider, 25 connecting rod, 26 mounting plate, 27 gear, 28 moving rod, 281 moving block, 282 spur rack, 29 first threaded rod, 291 first rocking wheel, 3 fixed column, 31 lifting groove, 32 lifting block, 33 second threaded rod, 34 gear rod, 35 second rocking wheel. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0021] Reference Figure 1-4 As shown, a spring fatigue life test device for an electric tailgate system comprises a test bench 1 and a cylinder 12, wherein a fixing plate 11 is installed at one end of the test bench 1, and the cylinder 12 is installed at the end of the test bench 1 away from the fixing plate 11, and two symmetrically distributed slide rails 13 are installed on the test bench 1 between the fixing plate 11 and the cylinder 12, and a slide seat 14 is slidably connected to the two slide rails 13, and the movable end of the cylinder 12 is connected to the slide seat 14, and a vertical slide rod 15 is connected to the slide seat 14, and a slide sleeve 16 is slidably connected to the slide rod 15, and an angle adjustment mechanism is provided on the test bench 1 for adjusting the angle of the spring pull rope.

[0022] In this embodiment, the angle adjustment mechanism includes two rotating seats 2, which are installed on the test bench 1 and are respectively located on both sides of the two slide rails 13. Each of the rotating seats 2 is rotatably connected to a rotating shaft 21, and a rotating plate 22 is connected to the rotating shaft 21. A sliding groove 23 is opened on each of the rotating plates 22, and a slider 24 is slidably connected to the sliding groove 23. The two sliders 24 are commonly connected to a connecting rod 25, and the connecting rod 25 is rotatably connected to the sliding sleeve 16.

[0023] In this embodiment, a gear 27 is coaxially connected to one of the rotating shafts 21, and a pair of mounting plates 26 are installed on the test bench 1. A moving rod 28 is connected between the pair of mounting plates 26. A moving block 281 is slidably connected to the moving rod 28. A spur rack 282 is connected to the lower end of the moving block 281, and the spur rack 282 is meshed with the gear 27. A first threaded rod 29 is rotatably connected between the pair of mounting plates 26. The first threaded rod 29 is threadedly connected to the moving block 281. One end of the first threaded rod 29 passes through the mounting plate 26 and is coaxially connected to a first rocker 291. The gear ratio of the spur rack 282 to the gear 27 is 1:4. By controlling the movement of the spur rack 282, the rotation control of the gear 27 within a range of 90° can be achieved, thereby achieving the angle adjustment of the rotating plate 22 within a range of 90°.

[0024] In this embodiment, a fixed column 3 is installed on the test bench 1, and a lifting groove 31 is opened on the side of the fixed column 3 close to the slide rail 13. A lifting block 32 is slidably connected in the lifting groove 31, and a shift rod 34 is connected to the outer end of the lifting block 32. The upper and lower groove walls of the lifting groove 31 are rotatably connected to a second threaded rod 33, and the second threaded rod 33 is threadedly connected to the lifting block 32. The upper end of the second threaded rod 33 passes through the fixed column 3 and is coaxially connected to a second rocker 35.

[0025] In this embodiment, a first mounting member 17 is connected to a side of the fixing plate 11 close to the cylinder 12, and a second mounting member 18 is connected to a side of the sliding sleeve 16 close to the fixing plate 11. The first mounting member 17 and the second mounting member 18 have the same structure and are both made of nickel-chromium alloy. The first mounting member 17 and the second mounting member 18 are in contact and friction with the hook of the spring for a long time when the entire device is in use. The nickel-chromium alloy has a relatively high strength and wear resistance, thereby improving the service life of the first mounting member 17 and the second mounting member 18.

[0026] The working process and principle of the present invention are as follows:

[0027] When in use, first buckle the two ends of the spring to be tested on the first mounting member 17 and the second mounting member 18 respectively. At this time, the spring is in a contracted state. Then, the cylinder 12 is turned on to pull the slide 14. The slide 14 slides along the direction of the slide rail 13, and the sleeve 16 moves with the slide 14. At the same time, the sleeve 16 will also be pulled upward by the connecting rod 25 and slide upward along the slide rod 15. At this time, one end of the spring is pulled by the sleeve 16 and becomes an angled stretch. During the spring stretching process, as the sleeve 16 is continuously lifted, the spring will come into contact with the gear rod 34. Under the obstruction of the gear rod 34, the stretched spring bends at the gear rod 34, which effectively simulates the working state of the spring in the electric tailgate system. The fatigue life test of the spring pull rope is carried out by the reciprocating extension and contraction of the cylinder 12, thereby ensuring the authenticity and accuracy of the spring fatigue life test.

[0028] During the test, the first rocker 291 can be rotated to drive the first threaded rod 29 to rotate, so as to move the spur rack 282. The meshing transmission between the spur rack 282 and the gear 27 can realize the angle control of the rotating plate 22, thereby controlling the change of the pull rope angle. At the same time, the second rocker 35 can be rotated to adjust the height of the gear lever 34 to control the bending angle of the spring, so that the test variables are adjustable, and fatigue life tests can be performed on springs of different models, thereby increasing the scope of use of the test device.

[0029] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A spring fatigue life test device for an electric tailgate system, characterized in that: The invention comprises a test bench (1) and a cylinder (12), wherein a fixing plate (11) is installed at one end of the test bench (1), and the cylinder (12) is installed at the end of the test bench (1) away from the fixing plate (11). Two symmetrically distributed slide rails (13) are installed on the test bench (1) between the fixing plate (11) and the cylinder (12), and a slide seat (14) is slidably connected to the two slide rails (13). The movable end of the cylinder (12) is connected to the slide seat (14), and a vertical slide rod (15) is connected to the slide seat (14), and a slide sleeve (16) is slidably connected to the slide rod (15). An angle adjustment mechanism is provided on the test bench (1) for adjusting the angle of the spring pull rope.

2. The spring fatigue life testing device for an electric tailgate system according to claim 1, characterized in that: The angle adjustment mechanism comprises two rotating seats (2), the two rotating seats (2) are mounted on the test bench (1) and are respectively located on both sides of two slide rails (13), each of the rotating seats (2) is rotatably connected to a rotating shaft (21), the rotating shaft (21) is connected to a rotating plate (22), each of the rotating plates (22) is provided with a sliding groove (23), the sliding groove (23) is slidably connected to a slider (24), the two sliders (24) are commonly connected to a connecting rod (25), and the connecting rod (25) is rotatably connected to the sliding sleeve (16).

3. The spring fatigue life testing device for an electric tailgate system according to claim 2, characterized in that: A gear (27) is coaxially connected to one of the rotating shafts (21); a pair of mounting plates (26) are installed on the test bench (1); a moving rod (28) is connected between the pair of mounting plates (26); a moving block (281) is slidably connected to the moving rod (28); a spur rack (282) is connected to the lower end of the moving block (281); the spur rack (282) is meshed with the gear (27); a first threaded rod (29) is rotatably connected between the pair of mounting plates (26); the first threaded rod (29) is threadedly connected to the moving block (281); one end of the first threaded rod (29) passes through the mounting plate (26) and is coaxially connected to a first rocker (291).

4. The spring fatigue life testing device for an electric tailgate system according to claim 1, characterized in that: The test bench (1) is provided with a fixed column (3), a lifting groove (31) is provided on a side of the fixed column (3) close to the slide rail (13), a lifting block (32) is slidably connected in the lifting groove (31), an outer end of the lifting block (32) is connected to a shift rod (34), upper and lower groove walls of the lifting groove (31) are rotatably connected to a second threaded rod (33), the second threaded rod (33) is threadedly connected to the lifting block (32), and the upper end of the second threaded rod (33) passes through the fixed column (3) and is coaxially connected to a second rocker (35).

5. The spring fatigue life testing device for an electric tailgate system according to claim 1, characterized in that: A first mounting member (17) is connected to a side of the fixing plate (11) close to the cylinder (12), and a second mounting member (18) is connected to a side of the sliding sleeve (16) close to the fixing plate (11).

6. The spring fatigue life testing device for an electric tailgate system according to claim 5, characterized in that: The first mounting member (17) and the second mounting member (18) have the same structure and are both made of nickel-chromium alloy.

7. The spring fatigue life testing device for an electric tailgate system according to claim 3, characterized in that: The gear ratio between the spur rack (282) and the gear (27) is 1:4.

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