Spring fatigue rapid detection device

Abstract

The utility model relates to the technical field of spring fatigue detection, and discloses a spring fatigue rapid detection device, which comprises a base and a detection mechanism arranged above the base, an auxiliary mechanism is arranged on the left side of the detection mechanism, and the detection mechanism comprises a mounting frame and a second spring limiting piece. The installation frame is connected with a servo motor through a lead screw, the lead screw is connected with an installation piece through a nut, the arranged detection mechanism and the servo motor drive the lead screw to rotate, the nut drives the installation piece and a first spring limiting piece to accurately ascend and descend, and high-frequency and stable reciprocating loading on a spring can be achieved; the spring fatigue detection speed is greatly improved, the requirement for rapid detection is met, the first spring limiting piece is connected with the installation piece through the second threaded hole and the fastening bolt, rapid replacement and adjustment can be conveniently carried out according to the sizes of springs of different specifications, and the spring fatigue detection device can adapt to detection of springs of various models.

Description

Technical Field

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

[0002] Spring fatigue refers to the physical characteristic of a spring that, under long-term repeated stress, gradually accumulates damage within the material, leading to a gradual decline in performance and eventually fracture. Therefore, fatigue assessment and control are crucial in the design, production, and use of springs. A rapid spring fatigue testing device is a piece of equipment specifically designed for the efficient evaluation of spring fatigue performance.

[0003] Most existing testing devices are integrated, and the limiting components cannot be adapted to springs of different specifications (e.g., springs with large differences in wire diameter and number of coils require replacement of the entire mechanism), resulting in poor versatility. Therefore, we propose a rapid spring fatigue testing device. Utility Model Content

[0004] The purpose of this invention is to provide a rapid spring fatigue detection device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rapid spring fatigue testing device, comprising a base and a testing mechanism disposed thereon, an auxiliary mechanism disposed on the left side of the testing mechanism, the testing mechanism comprising a mounting frame and a second spring limiting member, the mounting frame being connected to a servo motor via a lead screw, the lead screw being connected to a mounting component via a nut, and the mounting component being connected to a first spring limiting member via a second threaded hole and a fastening bolt.

[0006] As a preferred embodiment, the upper surface of the base has a telescopic groove extending through it near the left side, and the front of the base has a first threaded hole near the left side, the first threaded hole extending through the telescopic groove.

[0007] As a preferred embodiment, the mounting bracket is fixedly installed at the center of the surface of the base, the servo motor is fixedly installed at the upper end of the mounting bracket, the lead screw is fixedly installed at the output end of the servo motor, and the nut is threadedly connected to the outer wall of the lead screw.

[0008] As a preferred embodiment, the mounting bracket has a sliding groove on its front side, the mounting component is fixedly mounted on the outer wall of the nut, the mounting component is slidably connected inside the sliding groove, the outer walls of the mounting component and the first spring limiting component both have second threaded holes, the first spring limiting component is inserted into the interior of the mounting component, the fastening bolt is threaded into the interior of the second threaded hole, and the second spring limiting component is fixedly mounted on the upper surface of the base, located directly below the first spring limiting component.

[0009] As a preferred embodiment, the auxiliary mechanism includes a connecting frame and a fixing rod. The connecting frame is fixedly installed on the left side of the mounting component, and a spring force gauge is fixedly installed at the bottom of the connecting frame. A hook is fixedly installed at the bottom of the spring force gauge.

[0010] As a preferred embodiment, the fixing rod is slidably connected inside the telescopic groove, the upper end of the fixing rod has a hanging hole, the size of the hook is adapted to the hanging hole, and the internal thread of the first threaded hole is connected to a limit bolt.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] Through the set detection mechanism, the servo motor drives the lead screw to rotate, and the nut drives the mounting part and the first spring limit part to move up and down precisely. This enables high-frequency and stable reciprocating loading of the spring, which greatly improves the speed of spring fatigue detection and meets the needs of rapid detection. The first spring limit part is connected to the mounting part through the second threaded hole and fastening bolt, which makes it easy to quickly replace and adjust according to the size of springs of different specifications, so that it can be adapted to the detection of various types of springs.

[0013] With the auxiliary mechanism in place, the spring dynamometer moves synchronously with the mounting components. By engaging with the hanging hole on the fixed rod through the hook, it can monitor the force changes of the spring in real time during the fatigue testing process, providing accurate force data support for analyzing the spring fatigue degree and making the test results more reliable. The fixed rod is slidably connected in the telescopic groove, and its position can be flexibly adjusted in conjunction with the limit bolt to meet the needs of monitoring springs of different lengths, thereby enhancing the multifunctionality and operational flexibility of the device. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a partial structural schematic diagram of the present invention;

[0016] Figure 3 This is one of the partial structural schematic diagrams of the testing mechanism of this utility model;

[0017] Figure 4 This is the second partial structural schematic diagram of the testing mechanism of this utility model;

[0018] Figure 5 This is a partial structural diagram of the auxiliary mechanism of this utility model.

[0019] In the diagram: 1. Base; 2. First threaded hole; 3. Telescopic groove; 4. Detection mechanism; 401. Mounting bracket; 402. Sliding groove; 403. Servo motor; 404. Lead screw; 405. Nut; 406. Mounting component; 407. Second threaded hole; 408. First spring limit component; 409. Fastening bolt; 410. Second spring limit component; 5. Auxiliary mechanism; 501. Connecting bracket; 502. Spring force gauge; 503. Hook; 504. Fixing rod; 505. Hanging hole; 506. Limiting bolt. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see the appendix Figure 1 - Appendix Figure 4 A rapid spring fatigue testing device includes a base 1 and a testing mechanism 4 disposed on the base 1. An auxiliary mechanism 5 is disposed on the left side of the testing mechanism 4. The testing mechanism 4 includes a mounting bracket 401 and a second spring limiting member 410. The mounting bracket 401 is connected to a servo motor 403 through a lead screw 404. The lead screw 404 is connected to a mounting member 406 through a nut 405. The mounting member 406 is connected to a first spring limiting member 408 through a second threaded hole 407 and a fastening bolt 409.

[0022] A telescopic groove 3 runs through the upper surface of the base 1 near the left side, and a first threaded hole 2 is opened on the front side of the base 1 near the left side, with the first threaded hole 2 passing through the telescopic groove 3.

[0023] Mounting bracket 401 is fixedly installed at the center of the surface of base 1. Servo motor 403 is fixedly installed at the upper end of mounting bracket 401. Lead screw 404 is fixedly installed at the output end of servo motor 403. Nut 405 is threadedly connected to the outer wall of lead screw 404.

[0024] One end of the lead screw 404 is directly or indirectly fixed to the output shaft of the servo motor 403. The connection method must ensure effective torque transmission, such as key connection or expansion sleeve connection. Meanwhile, the other end of the lead screw 404 can be supported by a bearing seat to ensure the radial and axial stability of the lead screw 404 during rotation. The nut 405 is threadedly matched with the lead screw 404 to realize the linear transmission function.

[0025] The mounting bracket 401 has a sliding groove 402 on its front side. The mounting part 406 is fixedly installed on the outer wall of the nut 405. The mounting part 406 is slidably connected inside the sliding groove 402. The outer walls of the mounting part 406 and the first spring limiting part 408 are both provided with second threaded holes 407. The first spring limiting part 408 is inserted into the mounting part 406. The fastening bolt 409 is threaded into the second threaded hole 407. The second spring limiting part 410 is fixedly installed on the upper surface of the base 1, located directly below the first spring limiting part 408.

[0026] The first spring limiting member 408 is inserted into the mounting member 406, and the two have corresponding second threaded holes 407. They are locked by fastening bolts 409 to achieve a detachable connection. The second spring limiting member 410 is fixed on the base 1 and located directly below the first spring limiting member 408. It is connected to the base 1 by bolt fastening, welding or other methods. After installation, it is ensured to be coaxial with the first spring limiting member 408.

[0027] Specifically, the servo motor 403 drives the lead screw 404 to rotate, which in turn drives the mounting part 406 and the first spring limiting part 408 to move up and down precisely through the nut 405. This enables high-frequency and stable reciprocating loading of the spring, significantly improving the speed of spring fatigue testing and meeting the needs of rapid testing. The first spring limiting part 408 is connected to the mounting part 406 through the second threaded hole 407 and the fastening bolt 409, which facilitates quick replacement and adjustment according to the size of springs of different specifications, making it compatible with the testing of various types of springs.

[0028] Please see the appendix Figure 1 - Appendix Figure 5 The auxiliary mechanism 5 includes a connecting frame 501 and a fixing rod 504. The connecting frame 501 is fixedly installed on the left side of the mounting part 406. A spring force gauge 502 is fixedly installed at the bottom of the connecting frame 501, and a hook 503 is fixedly installed at the bottom of the spring force gauge 502.

[0029] The spring balance 502 is used to measure the force changes during spring testing in real time, and is an existing technology.

[0030] The fixing rod 504 is slidably connected inside the telescopic groove 3. The upper end of the fixing rod 504 has a hanging hole 505. The size of the hook 503 is adapted to the hanging hole 505. The internal thread of the first threaded hole 2 is connected to a limit bolt 506.

[0031] The fixed rod 504 can slide along the telescopic groove 3, thereby enabling the detection of springs of different lengths.

[0032] Specifically, the spring force gauge 502 moves synchronously with the mounting part 406. Through the hook 503 and the hanging hole 505 on the fixed rod 504, it can monitor the force change of the spring in real time during the fatigue test, providing accurate force data support for the analysis of spring fatigue, making the test results more referential. The fixed rod 504 is slidably connected in the telescopic groove 3, and its position can be flexibly adjusted in conjunction with the limit bolt 506 to meet the needs of monitoring springs of different lengths, enhancing the multifunctionality and operational flexibility of the device.

[0033] The working principle of this utility model is as follows: This utility model is a rapid spring fatigue testing device. First, according to the specifications of the spring to be tested, a suitable first spring limiting member 408 and a second spring limiting member 410 are selected and inserted into the mounting member 406. A fastening bolt 409 is inserted into the second threaded hole 407 on the outer wall of the mounting member 406 and the first spring limiting member 408 to fix the first spring limiting member 408. Simultaneously, the fixing rod 504 is slid along the telescopic groove 3 of the base 1. After adjusting to a suitable position, the limiting bolt 506 is screwed into the first threaded hole 2 to lock the fixing rod 504.

[0034] The spring to be tested is placed on the second spring limiting member 410 on the upper surface of the base 1. The servo motor 403 is started. The output end of the servo motor 403 drives the lead screw 404 to rotate. Due to the threaded engagement, the nut 405 on the outer wall of the lead screw 404 drives the mounting member 406 to slide down along the sliding groove 402 on the front of the mounting bracket 401, so that the first spring limiting member 408 approaches and contacts the spring, limiting the upper end of the spring.

[0035] Next, the connecting bracket 501 on the left side of the mounting component 406 moves down synchronously, and the hook 503 of the spring force gauge 502 at the bottom of the connecting bracket 501 falls down accordingly, hooking the hook 503 into the hanging hole 505 at the upper end of the fixed rod 504, completing the connection between the auxiliary mechanism 5 and the fixed rod 504. At this time, the spring force gauge 502 can monitor the force on the spring.

[0036] Subsequently, the servo motor 403 reverses, driving the lead screw 404 to rotate cyclically. The nut 405 drives the mounting part 406 to rise along the sliding groove 402. The spring force gauge 502 collects the spring force data and provides feedback on the force change of the spring under cyclic load. The servo motor 403 then cycles repeatedly. When the preset number of cycles is reached, or when the spring force gauge 502 detects an abnormal force value, such as a force decay exceeding a set threshold, and determines that the spring has failed due to fatigue, the servo motor 403 stops running. The servo motor 403 is then restarted in reverse, causing the mounting part 406 to move upward and reset, separating the first spring limiter 408 from the spring. The connection between the hook 503 and the hanging hole 505 is removed, and the tested spring is taken out, completing one spring fatigue test process.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rapid spring fatigue testing device, comprising a base (1) and a testing mechanism (4) disposed thereon, characterized in that: An auxiliary mechanism (5) is provided on the left side of the detection mechanism (4). The detection mechanism (4) includes a mounting bracket (401) and a second spring limiting member (410). The mounting bracket (401) is connected to a servo motor (403) via a lead screw (404). The lead screw (404) is connected to a mounting member (406) via a nut (405). The mounting member (406) is connected to a first spring limiting member (408) via a second threaded hole (407) and a fastening bolt (409).

2. The rapid spring fatigue detection device according to claim 1, characterized in that: The upper surface of the base (1) has a telescopic groove (3) extending through it near the left side. The front of the base (1) has a first threaded hole (2) near the left side, and the first threaded hole (2) extends through the telescopic groove (3).

3. The rapid spring fatigue detection device according to claim 2, characterized in that: The mounting bracket (401) is fixedly installed at the center of the surface of the base (1), the servo motor (403) is fixedly installed at the upper end of the mounting bracket (401), the lead screw (404) is fixedly installed at the output end of the servo motor (403), and the nut (405) is threadedly connected to the outer wall of the lead screw (404).

4. The rapid spring fatigue detection device according to claim 3, characterized in that: The mounting bracket (401) has a sliding groove (402) on its front side. The mounting part (406) is fixedly installed on the outer wall of the nut (405). The mounting part (406) is slidably connected inside the sliding groove (402). The outer walls of the mounting part (406) and the first spring limiting part (408) are both provided with second threaded holes (407). The first spring limiting part (408) is inserted into the interior of the mounting part (406). The fastening bolt (409) is threaded into the interior of the second threaded hole (407). The second spring limiting part (410) is fixedly installed on the upper surface of the base (1) directly below the first spring limiting part (408).

5. The rapid spring fatigue detection device according to claim 2, characterized in that: The auxiliary mechanism (5) includes a connecting frame (501) and a fixing rod (504). The connecting frame (501) is fixedly installed on the left side of the mounting component (406). A spring force gauge (502) is fixedly installed at the bottom of the connecting frame (501). A hook (503) is fixedly installed at the bottom of the spring force gauge (502).

6. The rapid spring fatigue detection device according to claim 5, characterized in that: The fixing rod (504) is slidably connected inside the telescopic groove (3). The upper end of the fixing rod (504) has a hanging hole (505) through it. The size of the hook (503) is adapted to the hanging hole (505). The internal thread of the first threaded hole (2) is connected to a limit bolt (506).

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