Spring fatigue testing device
By designing a spring fatigue testing device with replaceable fixed and rotating components, the problems of limited models and inflexible parameters of existing devices have been solved, enabling efficient and accurate testing of various springs and significantly improving testing efficiency and accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-04-03
AI Technical Summary
Existing spring fatigue testing devices are limited in the types of springs they can be used with, and the test parameters are not flexible, resulting in low testing efficiency and insufficient accuracy, making it difficult to meet diverse and customized testing needs.
A spring fatigue testing device was designed, which adopts replaceable fixed and rotating components, supports rapid adaptation of various spring end structures, achieves efficient testing through multi-axis synchronous drive design, and combines high-definition monitoring unit for real-time data acquisition and storage.
It significantly improves the versatility and efficiency of the testing device, enabling it to quickly adapt to different types of springs, shortening test preparation time, improving test accuracy and efficiency, and shortening the product development cycle.
Smart Images
Figure CN224081180U_ABST
Abstract
Description
Technical Field
[0001] This solution relates to the field of spring testing device technology, and in particular to a spring fatigue testing device. Background Technology
[0002] As a fundamental elastic element, springs are widely used in critical applications such as automotive suspension systems, mechanical transmission devices, and electronic equipment connections. In practical use, springs are subjected to cyclic loads such as tension, compression, and torsion over extended periods, and their fatigue performance directly affects the reliability and service life of the equipment.
[0003] However, existing spring fatigue testing equipment has many shortcomings. Most devices can only accommodate springs of specific specifications and shapes. When testing springs with different wire diameters, coil counts, lengths, or end structures, the entire set of test fixtures must be replaced. This not only involves complex disassembly and installation steps, consuming a lot of manpower and time, but also reduces equipment accuracy and seriously affects testing efficiency due to frequent fixture changes. In addition, some testing devices have limited functionality and lack flexibility in setting test parameters. For example, it is difficult to accurately control key parameters such as rotation angle, running speed, and cycle time during the test, failing to meet the diverse and customized testing needs of different industries for springs, thus affecting the accurate assessment of the true fatigue performance of springs.
[0004] Therefore, a testing device is needed that can meet the diverse testing needs of different types of springs. Summary of the Invention
[0005] To address the aforementioned issues, this solution provides a spring fatigue testing device that overcomes the limitations of traditional devices in terms of applicable spring models and inflexible test parameter settings, significantly improving the efficiency and accuracy of spring fatigue testing.
[0006] To achieve the above objectives, the technical solution adopted in this solution is: a spring fatigue testing device, set on a workbench, including a control unit and a testing unit;
[0007] The test unit can test at least two springs simultaneously, including a fixed component and a rotating component, and the limiting ends on the fixed component and the rotating component are replaceable.
[0008] Furthermore, the fixing component includes at least two fixing brackets, and the first limiting end is limited on the fixing bracket by the first fixing member;
[0009] The rotating assembly is powered by a power source at its bottom, which drives the rotating shaft to rotate. The rotating shaft protrudes from the worktable and is fitted with a rotating seat.
[0010] Furthermore, the top of the rotating seat is provided with a first assembly groove and a second assembly groove, and a plurality of assembly holes are evenly distributed on the side.
[0011] Furthermore, the first assembly slot or the second assembly slot is limited to the second limiting end by the second fixing member.
[0012] Furthermore, the second limiting end is inserted into the first assembly slot;
[0013] The second limiting end and the first limiting end have the same structure. The bottom of the rod is connected to a cylinder, and the side of the cylinder is provided with a limiting groove, which limits the two ends of the spring respectively.
[0014] Furthermore, the second limiting end is inserted into the second assembly slot;
[0015] The first limiting end is a rod structure, which is limited on the fixed bracket by the first fixing member. The first limiting end and the mounting rod provide fixed support for the spring.
[0016] Furthermore, at the second limiting end, the mounting block is inserted into the second assembly slot and limited by the second fixing member, and a plurality of mounting holes for limiting the mounting rod are evenly distributed on the top of the mounting block.
[0017] Furthermore, the workbench also includes a monitoring unit.
[0018] Furthermore, the monitoring unit and the control unit are connected via a data transmission line to collect images of the test unit's operation process.
[0019] Furthermore, a protective cover is movably connected to the workbench, and the protective cover covers the test unit.
[0020] In summary, this solution has the following advantages:
[0021] The fixed and rotating components provided in this solution can be adapted to various spring types, including small precision electronic springs, large mechanical engineering springs, and irregularly shaped springs with special end structures, simply by quickly replacing the corresponding limiting ends. This device can accommodate various spring testing needs, including straight ends, hook ends, and bends, greatly expanding its application range and significantly improving its versatility. Furthermore, the limiting ends only require simple replacement to adapt to different springs, significantly saving test preparation time and effectively improving overall testing efficiency.
[0022] The rotating component provided in this solution adopts a multi-axis synchronous drive design, which can drive multiple rotating axes simultaneously. Compared with traditional single-axis testing devices, the testing efficiency is improved several times, significantly shortening the product development cycle and quality inspection time. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of a spring fatigue testing device;
[0024] Figure 2 This is a top view of the spring fatigue testing device;
[0025] Figure 3 This is a schematic diagram of the spring being fixed to the device;
[0026] Figure 4 This is a schematic diagram of the rotating component;
[0027] Figure 5 This is an assembly diagram of the rotating base and the second limiting end;
[0028] Figure 6 This is a schematic diagram of the rotary base;
[0029] Figure 7 This is a schematic diagram of the second limiting end;
[0030] Figure 8 This is an assembly diagram of the fixed bracket and the first limiting end in another embodiment;
[0031] Figure 9 This is an assembly diagram of the rotating seat and the second limiting end in another embodiment;
[0032] in:
[0033] 100. Control unit;
[0034] 200. Test unit; 210. Fixing component; 211. Fixing bracket; 212. First fixing member; 213. First limiting end; 2131. First limiting groove; 220. Rotating component; 221. Power source; 222. Rotating shaft; 223. Rotating seat; 2231. First assembly groove; 2232. Second assembly groove; 2233. Assembly hole; 224. Second fixing member; 225. Second limiting end; 2251. Second limiting groove; 2252. Mounting block; 22521. Mounting hole; 2253. Mounting rod;
[0035] 300. Monitoring unit;
[0036] 1. Workbench; 11. Protective cover. Detailed Implementation
[0037] The present solution will be further described below with reference to the accompanying drawings and embodiments:
[0038] Example 1:
[0039] A spring fatigue testing device, such as Figure 1-8 As shown, a control unit 100, a test unit 200 and a monitoring unit 300 are integrated on the workbench 1, and a protective cover 11 is movably connected to the workbench 1 and covers the test unit 200.
[0040] The control unit 100 is electrically connected to the test unit 200. The control unit 100 employs a PLC control system, allowing users to set the target number of rotations via touch operation and precisely control the rotation angle, running speed, jogging speed, and cycle waiting time of the test unit 200. Furthermore, the control unit 100 supports one-button switching between forward and reverse rotation modes to meet the testing requirements of the spring under different force directions. During testing, the control unit 100 collects and displays the number of rotations in real time, and simultaneously shows the trend of test data changes in dynamic chart form, providing users with an intuitive and comprehensive test monitoring experience.
[0041] In this structural design, the test unit 200 includes a fixed component 210 and a rotating component 220, with replaceable limiting ends on both components. Whether it's a small-sized precision electronic spring, a large-sized mechanical engineering spring, or a uniquely shaped spring with a special end structure, adaptation can be achieved by quickly replacing the corresponding limiting end. This structural design can accommodate various spring testing needs, including straight ends, hook ends, and bends, greatly expanding the application range of the device and significantly improving its versatility. Furthermore, the limiting end only requires simple replacement to adapt to different springs, significantly saving test preparation time and effectively improving overall testing efficiency.
[0042] The fixing assembly 210 is fixedly installed on the workbench 1. It includes at least two fixing brackets 211. The fixing brackets 211 are provided with fixing limiting structures at their ends. The first limiting end 213 is limited on the fixing bracket 211 by the first fixing member 212. Specifically, the first limiting end 213 can be quickly replaced by tightening or loosening the first fixing member 212.
[0043] The top of the first limiting end 213 is a rod, and the bottom of the rod is connected to a cylinder. The side of the cylinder includes a first limiting groove 2131. The size and shape of the first limiting groove 2131 can be customized according to the end structure of different springs, and can limit one end of the spring to prevent the spring from shifting or falling off during the test.
[0044] In this structural configuration, the rotating assembly 220 is fixedly positioned on the worktable 1. It includes a power source 221 beneath the worktable 1, which drives at least two rotating shafts 222 to rotate. The rotating shafts 222 protrude from the worktable 1 and are fitted with rotating seats 223. The top of the rotating seat 223 has a first assembly groove 2231 and a second assembly groove 2232. The side of the rotating seat 223 has several evenly distributed assembly holes 2233 for installing a second fixing member 224. The second fixing member 224 can be a locating pin or other auxiliary fixing device.
[0045] The first assembly slot 2231 and the second assembly slot 2232 have different structures and dimensions, and can be adapted to different types of second limiting ends 225. The second limiting end 225 can be inserted into the first assembly slot 2231 or the second assembly slot 2232 of the corresponding rotating seat 223 according to the specific specifications of the spring, and the limiting installation is achieved by the second fixing member 224.
[0046] In this embodiment, the second limiting end 225 has the same structure as the first limiting end 213. A cylinder is connected to the bottom of the rod, and the side of the cylinder includes a second limiting groove 2251. The cylinder of the second limiting end 225 is inserted into and fits against the first assembly groove 2231. By tightening or loosening the second fixing member 224, the installation and replacement of the second limiting end 225 can be quickly completed. The other end of the limiting spring in the second limiting groove 2251 cooperates with the first limiting groove 2131 to ensure that the spring maintains a stable force state during high-speed rotation testing.
[0047] In this embodiment, the power source 221 of the rotating assembly 220 is a servo motor at the bottom. Servo motors are existing technology, characterized by fast response speed, high control precision, and large output torque. The output shaft of the servo motor is rigidly connected to the active synchronous pulley via a high-precision coupling, ensuring zero backlash and high reliability during power transmission. Each rotating shaft 222 has a driven synchronous pulley mounted at its bottom. The active synchronous pulley and multiple driven synchronous pulleys are connected by a ring-shaped synchronous belt to transmit power. This synchronous belt ensures that multiple rotating shafts 222 achieve high-precision synchronous rotation under the drive of the servo motor. The number of rotating shafts 222 can be adjusted according to actual testing requirements.
[0048] In this embodiment, six rotating shafts 222 and fixed supports 211 are provided, meaning that six springs can be tested simultaneously, and multiple rotating shafts 222 can be driven to operate at the same time. Compared with traditional single-axis testing devices, the testing efficiency is improved several times, significantly shortening the product development cycle and quality inspection time.
[0049] like Figure 1 and Figure 2 As shown, the system also includes a monitoring unit 300, which is fixedly mounted on the workbench 1. It features a high-definition camera positioned to monitor the operation of the testing unit 200 from all angles without blind spots. The camera and control unit 100 are connected via a data transmission cable for real-time data transmission. The control unit 100 has a built-in large-capacity data storage module that continuously stores the video data collected by the camera. After the test, if a spring breakage is detected, the user can easily retrieve the playback video from the camera through the human-machine interface of the control unit 100 to accurately determine the specific number of spring breaks and the operating conditions at the time of the test.
[0050] Further explanation of the usage mechanism of the spring fatigue testing device for torsion springs:
[0051] S1. Install springs
[0052] Place one end of the spring into the first limiting groove 2131 of the first limiting end 213, and install the other end of the spring into the second limiting groove 2251 of the second limiting end 225, ensuring that the end of the spring is tightly fitted with the limiting groove.
[0053] S2. Set test parameters
[0054] According to the testing standards and experimental requirements, the target number of rotations was set sequentially, and the rotation angle, running speed, jogging speed, and cycle waiting time of the test unit 200 were precisely adjusted. Simultaneously, the forward or reverse rotation mode was selected based on the actual force direction of the spring. After confirming that the camera was in normal working condition and capable of image preview, the protective cover 11 was then placed over the test unit 200.
[0055] S3, Start the test.
[0056] Click the start button on the control unit 100's operating interface. The servo motor receives the start signal and drives the active synchronous pulley to rotate. The active synchronous pulley drives multiple driven synchronous pulleys via a ring-shaped synchronous belt, which in turn drives multiple rotating shafts 222 to rotate synchronously. The testing device begins operating according to the set parameters. During the test, the camera continuously captures the working images of the testing unit 200 and transmits the data to the control unit 100 for storage.
[0057] S4. Record and analyze the results after the test.
[0058] Once the set target number of tests is reached, the control unit 100 automatically triggers a stop command, the servo motor brakes rapidly, and the rotating component 220 stops operating. If a spring breakage is discovered during or after the test, the user can click the "Video Playback" function button on the human-machine interface of the control unit 100 to retrieve the test process video recorded by the camera according to the timeline or test count index, accurately determining the number of tests and operating conditions at the time of spring breakage.
[0059] Example 2
[0060] The difference between this embodiment and Embodiment 1 is that the first limiting end 213' is a rod structure, which is limited on the fixed bracket 211 by the first fixing member 212. For springs with a hook structure, the hook at one end can be directly sleeved on the first limiting end 213' to achieve quick positioning.
[0061] The second limiting end 225' includes a mounting block 2252 and a mounting rod 2253. The shape of the mounting block 2252 matches the second assembly slot 2232, allowing it to be tightly inserted into the second assembly slot 2232. By tightening or loosening the second fixing member 224, the installation and replacement of the second limiting end 225 can be quickly completed. The top of the mounting block 2252 has several mounting holes 22521 evenly distributed. The diameter and depth of the mounting holes 22521 can be customized according to different specifications of the mounting rod 2253. Based on the length and end structure of the spring, a suitable mounting rod 2253 can be selected and positioned within the mounting holes 22521 to provide reliable fixed support for the other end of the spring.
[0062] In summary, the fixing and rotating components provided in this application can be adapted to various spring types, including small-sized precision electronic springs, large-sized mechanical engineering springs, and irregularly shaped springs with special end structures, simply by quickly replacing the corresponding limiting ends. This device can adapt to the testing needs of various spring types with end structures such as straight ends, hook ends, and bends, greatly expanding its application range and significantly improving its versatility. Furthermore, the limiting ends only require simple replacement to adapt to different springs, significantly saving test preparation time and effectively improving overall testing efficiency.
[0063] The rotary component provided in this application adopts a multi-axis synchronous drive design, which can drive multiple rotary axes simultaneously. Compared with traditional single-axis testing devices, the testing efficiency is improved several times, significantly shortening the product development cycle and quality inspection time.
[0064] The above embodiments are only for illustrating the technical concept and features of this solution, and are intended to enable those skilled in the art to understand the content of this solution and implement it accordingly. They should not be used to limit the scope of protection of this solution. All equivalent transformations or modifications made in accordance with the spirit and essence of this solution should be included within the scope of protection of this solution.
[0065] In the description of this solution, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly. For example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; and they can be internal connections between two components.
[0066] Those skilled in the art can understand the specific meaning of the above terms in this solution based on the specific circumstances.
[0067] It should be understood that the above-described embodiments are merely exemplary and not restrictive. Any obvious or equivalent modifications or substitutions made by those skilled in the art regarding the above details without departing from the basic principles of this solution will be included within the scope of protection of this solution.
Claims
1. A spring fatigue testing device, which is arranged on a workbench (1), characterized in that, The device comprises a control unit (100) and a testing unit (200); The testing unit (200) can simultaneously test at least two springs, and comprises a fixing assembly (210) and a rotating assembly (220), and the limiting ends on the fixing assembly (210) and the rotating assembly (220) can be replaced.
2. The spring fatigue testing apparatus of claim 1, wherein: The fixing assembly (210) comprises at least two fixing supports (211), and the first limiting end (213) is limited on the fixing support (211) by the first fixing member (212). The rotating shaft (222) is exposed to the workbench (1) and externally sleeved with the rotating seat (223) driven by the power source (221) at the bottom of the rotating assembly (220).
3. The spring fatigue testing apparatus of claim 2, wherein: The rotating seat (223) is provided with the first assembly groove (2231) and the second assembly groove (2232) at the top, and a plurality of assembly holes (2233) are uniformly distributed on the side surface.
4. The spring fatigue testing apparatus of claim 3, wherein: The first assembly groove (2231) or the second assembly groove (2232) limits the second limiting end (225) by the second fixing member (224).
5. The spring fatigue testing apparatus of claim 4, wherein: The second limiting end (225) is inserted into the first assembly groove (2231). The second limiting end (225) and the first limiting end (213) are of the same structure, the bottom of the rod body is connected with a cylinder, and a limiting groove is arranged on the side surface of the cylinder and limits the two ends of the spring.
6. The spring fatigue testing apparatus of claim 4, wherein: The second limiting end (225) is inserted into the second assembly groove (2232). The first limiting end (213) is of a rod body structure and is limited on the fixing support (211) by the first fixing member (212), and the first limiting end (213) and the mounting rod (2253) provide fixed support for the spring.
7. The spring fatigue testing apparatus of claim 6, wherein: The second limiting end (225) is inserted into the second assembly groove (2232) and is limited by the second fixing member (224), and the mounting block (2252) is provided with a plurality of mounting holes (22521) for limiting the mounting rod (2253) and uniformly distributed on the top.
8. The spring fatigue testing apparatus of claim 1, wherein: The workbench (1) further comprises a monitoring unit (300).
9. The spring fatigue testing apparatus of claim 8, wherein: The monitoring unit (300) is connected with the control unit (100) through a data transmission line and is used for collecting the working process picture of the testing unit (200).
10. The spring fatigue testing apparatus of claim 8, wherein: The workbench (1) is movably connected with a protective cover (11), and the protective cover (11) covers the testing unit (200).