Spring fatigue testing device

Abstract

The utility model relates to the field of spring fatigue testing, in particular to a spring fatigue testing device which comprises a testing box used for spring fatigue testing. The transparent outer door is movably arranged on the right side of the test box. According to the spring fatigue testing device, the first moving seat, the driving mechanism, the second moving seat, the hydraulic cylinder and the piston rod are arranged, the length of the spring is tested, a hydraulic cylinder switch is turned on, and the piston rod in the spring is pushed to drive the second moving seat to slide on the sliding rod; the distance between a first moving seat and a second moving seat is adjusted according to the length of a test spring, then the test spring is placed on a sleeve and an anti-drop hook, a driving motor switch is turned on, a first bevel gear and a second bevel gear are driven to be in meshing transmission, and therefore a connecting disc and a connecting plate are driven to rotate. The connecting plate rotates to pull the movable handle rod and the first moving seat to move up and down in a reciprocating manner, so that a tensile fatigue test is performed on the test spring.

Description

Technical Field

[0001] This utility model relates to the field of spring fatigue testing, and specifically to a spring fatigue testing device. Background Technology

[0002] During long-term use, springs may fail to rebound. Currently, spring fatigue testing devices are used to detect the lifespan and number of cycles of a spring. Existing spring fatigue testing instruments fix both sides of the spring and perform repeated stretching on one side to complete the fatigue test.

[0003] A search revealed a utility model for a button spring fatigue testing device (publication number CN216594107U). The device includes a test platform, a base box fixedly installed at the bottom of the platform, a spring tester installed on one side of the top of the platform, a first electric telescopic rod fixedly installed at the center of the top of the platform, a vertical plate fixedly connected to the other side of the top of the platform, a top plate fixedly connected to the top of the vertical plate, a spring force gauge installed on one side of the bottom of the top plate, and a second electric telescopic rod fixedly installed on the other side of the bottom of the top plate. A mounting plate is fixedly connected to the center of the inner wall of the test platform, and impact-resistant mechanisms are fixedly installed on both sides of the mounting plate. This utility model, a button spring fatigue testing device, incorporates a spring tester, a first electric telescopic rod, a spring force gauge, and a second electric telescopic rod, resulting in better spring fatigue testing performance and improved product quality. The base box and impact-resistant mechanisms enhance stability during testing.

[0004] Existing spring fatigue testing devices perform tensile fatigue testing by fixing both ends of the spring in the testing device and using hydraulic drive. However, most tests use hydraulic cylinders to extend and retract to stretch the spring, which limits the stability and accuracy of the hydraulic cylinders and also makes it impossible to effectively adjust the stretching length of the spring. In the comparative case above, the button spring fatigue testing device uses an electric telescopic rod to stretch the spring for testing. The electric telescopic rod uses the same method as the hydraulic cylinder, which limits the stability and accuracy of this design.

[0005] Therefore, it is necessary to invent a spring fatigue testing device to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a spring fatigue testing device. By testing the length of the spring, the hydraulic cylinder switch is turned on, pushing the internal piston rod to drive the second moving seat to slide on the slide rod. The distance between the first and second moving seats is adjusted according to the length of the spring being tested. Then, the spring is placed on the sleeve and the anti-detachment hook. Next, the drive motor switch is turned on, driving the first and second helical gears to mesh and drive the connecting plate and connecting plate to rotate. The rotation of the connecting plate pulls the movable handle and the first moving seat to move up and down reciprocally, thereby performing a tensile fatigue test on the spring. This solves the problem in the comparative case of the button spring fatigue testing device mentioned in the background art, which uses an electric telescopic rod to stretch the spring for testing. The electric telescopic rod and the hydraulic cylinder are the same, which limits the stability and accuracy of the design.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a spring fatigue testing device, including a testing box, for spring fatigue testing;

[0008] A transparent outer door is movably located on the right side of the test chamber for protection. A display is located on the left side of the test chamber. A fixed base is fixedly connected to the bottom inside the test chamber. Slide rods are fixedly connected to the upper two sides of the fixed base. A first movable seat is movably connected to the outside of the slide rods. Sleeves are fixedly connected to the upper two sides of the first movable seat. A test spring is installed inside the sleeves. A second movable seat is located outside the slide rods. A hydraulic cylinder is fixedly installed on the top of the test chamber. A piston rod is movably connected inside the hydraulic cylinder. The upper end of the second movable seat is fixedly connected to the piston rod. A frame is fixedly connected to the lower two sides of the second movable seat.

[0009] A drive mechanism, located on the rear side of the fixed base, is used to drive fatigue testing. The drive mechanism includes a drive motor and a movable frame.

[0010] Preferably, the drive motor is located on the rear side of the fixed base, and a first helical gear is fixedly connected to the output end of the drive motor. A second helical gear is meshed with one side of the first helical gear. A connecting plate is fixedly connected to the rear end of the second helical gear. A connecting plate is fixedly connected to the rear side of the connecting plate. A movable handle is movably connected to the outer side of the connecting plate. The movable frame is movably connected to the movable handle. The movable frame is fixedly connected to the first movable base.

[0011] Preferably, the connecting disc and the connecting plate are integrated, the movable handle is located on the upper outer side of the connecting plate, and the movable handle is rotatably connected to the connecting plate.

[0012] Preferably, the sleeve has a limiting groove inside, an insertion hole on the outer surface of the sleeve, and an insertion rod passing through the inside of the sleeve.

[0013] Preferably, the first movable seat and the second movable seat are slidably connected to the slide rod, and the slide rod is symmetrically arranged about the central axis of the first movable seat and the second movable seat.

[0014] Preferably, a pressure sensor is installed inside the frame, and an anti-detachment hook is provided at the bottom of the frame.

[0015] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0016] 1. By configuring the first movable seat, drive mechanism, second movable seat, hydraulic cylinder, and piston rod, fatigue testing can be performed continuously in a reciprocating cycle. Furthermore, adjustments can be made based on the length of different test springs and testing standards. By adjusting the length of the test spring, the hydraulic cylinder switch is turned on, pushing the internal piston rod to slide the second movable seat on the slide rod. This adjusts the distance between the first and second movable seats according to the length of the test spring. The test spring is then placed on the sleeve and anti-detachment hook. Next, the drive motor switch is turned on, driving the first and second helical gears to mesh and rotate, thereby rotating the connecting plate and connecting disk. The rotation of the connecting disk pulls the movable handle and the first movable seat up and down repeatedly, thus performing a tensile fatigue test on the test spring.

[0017] 2. By setting up a sleeve, limiting groove, insertion hole, insertion rod, test spring, frame and anti-detachment hook, the lower end of the test spring is placed in the limiting groove inside the sleeve, and then the insertion rod is inserted from the insertion hole on one side of the sleeve to limit the test spring inside the sleeve, so as to prevent loosening during fatigue test tension. At the same time, the upper end of the test spring is connected by an anti-detachment hook, which can improve the anti-detachment performance of the test spring and prevent it from breaking open. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the drive mechanism structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the spring structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the sleeve structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the anti-detachment hook structure of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Test chamber; 2. Transparent outer door; 3. Display; 4. Fixed base; 5. Slide rod; 6. First movable base; 7. Drive mechanism; 701. Drive motor; 702. First helical gear; 703. Second helical gear; 704. Connecting plate; 705. Connecting plate; 706. Movable handle; 707. Movable frame; 8. Sleeve; 9. Limiting groove; 10. Insertion hole; 11. Insertion rod; 12. Test spring; 13. Second movable base; 14. Hydraulic cylinder; 15. Piston rod; 16. Frame; 17. Anti-detachment hook. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] This utility model provides, for example Figure 1-5 The spring fatigue testing device shown includes a test chamber 1 for spring fatigue testing.

[0028] A transparent outer door 2 is movable on the right side of the test chamber 1 for protection. A display 3 is installed on the left side of the test chamber 1. A fixed base 4 is fixedly connected to the bottom inside the test chamber 1. A slide rod 5 is fixedly connected to the upper two sides of the fixed base 4. A first movable base 6 is movably connected to the outside of the slide rod 5. A sleeve 8 is fixedly connected to the upper two sides of the first movable base 6. A test spring 12 is installed inside the sleeve 8. A second movable base 13 is installed outside the slide rod 5. A hydraulic cylinder 14 is fixedly installed on the top of the test chamber 1. A piston rod 15 is movably connected inside the hydraulic cylinder 14. The upper end of the second movable base 13 is fixedly connected to the piston rod 15. A frame 16 is fixedly connected to the lower two sides of the second movable base 13.

[0029] The drive mechanism 7, located behind the fixed base 4, is used to drive the fatigue test. The drive mechanism 7 includes a drive motor 701 and a movable frame 707. By testing the length of the spring 12, the hydraulic cylinder 14 is switched on, pushing the internal piston rod 15 to drive the second movable seat 13 to slide on the slide rod 5. This adjusts the distance between the first movable seat 6 and the second movable seat 13 according to the length of the spring 12. Then, the spring 12 is placed on the sleeve 8 and the anti-detachment hook 17. Next, the drive motor 701 is switched on, driving the first helical gear 702 and the second helical gear 703 to mesh and drive the connecting plate 704 and the connecting plate 705 to rotate. The rotation of the connecting plate 705 pulls the movable handle 706 and the first movable seat 6 to move up and down repeatedly, thereby performing a tensile fatigue test on the spring 12.

[0030] like Figure 1 and Figure 2 As shown, the drive motor 701 is located on the rear side of the fixed base 4. The output end of the drive motor 701 is fixedly connected to a first helical gear 702. A second helical gear 703 is meshed with one side of the first helical gear 702. A connecting plate 704 is fixedly connected to the rear end of the second helical gear 703. A connecting plate 705 is fixedly connected to the rear side of the connecting plate 704. A movable handle 706 is movably connected to the outer side of the connecting plate 705. A movable frame 707 is movably connected to the movable handle 706. The movable frame 707 is fixedly connected to the first movable base 6. By turning on the drive motor 701, the first helical gear 702 and the second helical gear 703 are driven to mesh and transmit power, so that the second helical gear 703 drives the connecting plate 704 and the connecting plate 705 to rotate. During the rotation of the connecting plate 705, the movable handle 706 is pulled up and down, thereby pulling the movable frame 707 and the first movable base 6 to extend and retract outside the slide rod 5, thereby performing a tensile test on the test spring 12.

[0031] like Figure 2 As shown, the connecting plate 704 and the connecting plate 705 are integrated. The movable handle 706 is located on the upper outer side of the connecting plate 705. The movable handle 706 is rotatably connected to the connecting plate 705. When the connecting plate 704 and the connecting plate 705 rotate simultaneously, they can continuously pull and push the movable handle 706 to move up and down, thereby driving the first moving seat 6 and the test spring 12 above to perform tensile fatigue testing.

[0032] like Figure 3 and Figure 4 As shown, a limiting groove 9 is provided inside the sleeve 8, and an insertion hole 10 is provided on the outer surface of the sleeve 8. An insertion rod 11 passes through the inside of the sleeve 8. After the test spring 12 is placed inside the sleeve 8, the lower end of the test spring 12 is placed into the limiting groove 9 inside the sleeve 8. Then, the insertion rod 11 is inserted from the insertion hole 10 on one side of the sleeve 8 to limit the test spring 12 inside the sleeve 8, so as to prevent it from loosening during the fatigue test tensioning process.

[0033] like Figure 1 , Figure 2 and Figure 3 As shown, the first movable seat 6 and the second movable seat 13 are slidably connected to the slide rod 5. The slide rod 5 is symmetrically arranged about the central axis of the first movable seat 6 and the second movable seat 13. The arrangement of the two sets of slide rods 5 enables the first movable seat 6 and the second movable seat 13 to play a stabilizing role during movement.

[0034] like Figure 3 and Figure 5As shown, a pressure sensor is installed inside the frame 16, and an anti-detachment hook 17 is installed at the bottom of the frame 16. When the upper end of the test spring 12 is hung on the anti-detachment hook 17, the test spring 12 exerts a certain pulling force on the anti-detachment hook 17, thereby sensing the pressure sensor inside the frame 16 and transmitting the pressure data to the display 3, so that the staff can check the pressure of the test spring 12.

[0035] The working principle of this utility model is as follows: First, connect the external power supply. Then, open the transparent outer door 2. Next, according to the length of the test spring 12 and the fatigue test standard, turn on the hydraulic cylinder 14 switch on the top of the test chamber 1. This pushes the internal piston rod 15, causing the second moving seat 13 to slide on the slide rod 5. This adjusts the distance between the first moving seat 6 and the second moving seat 13 according to the length of the test spring 12. Then, by placing the lower end of the test spring 12 into the limiting groove 9 inside the sleeve 8, the insertion rod 11 is inserted from the insertion hole 10 on one side of the sleeve 8 to limit the test spring 12 inside the sleeve 8, preventing it from loosening during the fatigue test stretching process. At the same time, the upper end of the test spring 12 is suspended on the anti-detachment hook 17, which improves the anti-detachment performance of the test spring 12. After the test spring 12 is installed, close the transparent outer door 2 to prevent the test spring 12 from breaking open and splashing out during the test. Next, turn on the drive motor 701 switch, which drives the first helical gear 702 and the second helical gear 703 to mesh and drive the connecting plate 704 and the connecting plate 705 to rotate. The rotation of the connecting plate 705 pushes and pulls the movable handle 706, the first moving seat 6, and the test spring 12 above to move up and down repeatedly, thereby performing a tensile fatigue test on the test spring 12. At the same time, the pressure sensor inside the frame 16 senses the pressure and transmits the pressure data to the display 3, so that the staff can check the pressure of the test spring 12. The test spring 12 is continuously stretched to complete the pressure test. Finally, after the pressure fatigue test is completed, turn off the drive motor 701 switch, and then remove the test spring 12 from the sleeve 8 and the anti-detachment hook 17. Finally, when the device is no longer in use, disconnect the external power supply. This completes the use of the spring fatigue testing device.

[0036] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A spring fatigue testing device, characterized in that: Includes a test chamber (1) for spring fatigue testing; A transparent outer door (2) is movably set on the right side of the test box (1) for protection. A display (3) is set on the left side of the test box (1). A fixed seat (4) is fixedly connected to the bottom inside the test box (1). A slide rod (5) is fixedly connected to the upper two sides of the fixed seat (4). A first movable seat (6) is movably connected to the outside of the slide rod (5). A sleeve (8) is fixedly connected to the upper two sides of the first movable seat (6). A test spring (12) is installed inside the sleeve (8). A second movable seat (13) is set outside the slide rod (5). A hydraulic cylinder (14) is fixedly set on the top of the test box (1). A piston rod (15) is movably connected inside the hydraulic cylinder (14). The upper end of the second movable seat (13) is fixedly connected to the piston rod (15). A frame (16) is fixedly connected to the lower two sides of the second movable seat (13). The drive mechanism (7) is located on the rear side of the fixed base (4) and is used to drive the fatigue test. The drive mechanism (7) includes a drive motor (701) and a movable frame (707).

2. The spring fatigue testing device according to claim 1, characterized in that: The drive motor (701) is located on the rear side of the fixed base (4). The output end of the drive motor (701) is fixedly connected to a first helical gear (702). A second helical gear (703) is meshed with one side of the first helical gear (702). A connecting plate (704) is fixedly connected to the rear end of the second helical gear (703). A connecting plate (705) is fixedly connected to the rear side of the connecting plate (704). A movable handle (706) is movably connected to the outer side of the connecting plate (705). The movable frame (707) is movably connected to the movable handle (706). The movable frame (707) is fixedly connected to the first movable base (6).

3. The spring fatigue testing device according to claim 2, characterized in that: The connecting plate (704) and the connecting plate (705) are integrated. The movable handle (706) is located on the upper outer side of the connecting plate (705) and is rotatably connected to the connecting plate (705).

4. The spring fatigue testing device according to claim 1, characterized in that: The sleeve (8) has a limiting groove (9) inside, and an insertion hole (10) is provided on the outer surface of the sleeve (8). An insertion rod (11) passes through the inside of the sleeve (8).

5. The spring fatigue testing device according to claim 1, characterized in that: The first movable seat (6) and the second movable seat (13) are slidably connected to the slide rod (5), and the slide rod (5) is symmetrically arranged about the central axis of the first movable seat (6) and the second movable seat (13).

6. The spring fatigue testing device according to claim 1, characterized in that: The frame (16) is equipped with a pressure sensor inside, and an anti-detachment hook (17) is provided below the frame (16).

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