A spring fatigue testing machine

Abstract

The utility model is suitable for fatigue test technical field provides a kind of spring fatigue testing machine, include: two fatigue test frames;Spring limiting mechanism;The spring limiting mechanism is arranged in two fatigue test frames middle, by the spring limiting mechanism being set, when the fatigue resistance of test spring is placed in two spring clamping rings, start micro motor, make double thread screw rotate, drive two limit driving blocks synchronous to middle movement, the spring clamping ring of fixed in the front side of limit driving block also synchronously with the center to close, until from both ends firmly clamps spring, after testing, reverse start micro motor, double thread screw reverse rotation, drive two limit driving blocks synchronous to outer movement, operator only needs to press button, can complete the clamping and loosening of spring, greatly shorten the preparation time before testing and the disassembly time after testing, significantly improve overall test efficiency.

Description

Technical Field

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

[0002] In various applications, springs often need to withstand repeated loads. Their performance gradually deteriorates with the increase of cycles, and they may even experience fatigue fracture, leading to equipment failure or safety accidents. Therefore, the fatigue performance of springs is a core indicator for measuring their quality and reliability, and an important basis for product design and selection.

[0003] Chinese patent discloses a spring fatigue testing machine, publication number CN222951961U. The paper states that "a base plate and a top plate are provided on the frame, a push plate is slidably mounted on the frame, a driving component is provided on the frame, and mounting plates are provided on both sides of the push plate. A limit rod is provided on the push plate, and the limit rod is slidably connected to the mounting plate. A spring is sleeved on the limit rod and located between the mounting plate and the push plate. A collar is provided on the push plate, and a fixing component is provided on the mounting plate. The spring is sleeved on the limit rod and placed at the collar of the push plate. The fixing component on the mounting plate fixes one end of the spring. After installation, the driving component drives the push plate to slide, and when the push plate slides, it causes the limit rod to slide on the mounting plate. The spring is limited and fixed by the limit rod and the fixing component, resulting in a good fixing effect. This application has the effect that the spring is not easily detached."

[0004] However, the above solution requires operators to manually put the spring on the limit rod and manually operate the fixing component to lock it. After the test is completed, the fixing component must be manually loosened and the spring removed. The whole process relies on manual intervention, which is not only time-consuming, but also will seriously slow down the overall testing rhythm in the scenario of continuous testing of a large number of springs. Summary of the Invention

[0005] This invention provides a spring fatigue testing machine, which aims to solve the above problems.

[0006] This utility model is implemented as follows: a spring fatigue testing machine, comprising: Two fatigue testing stands; A spring limiting mechanism is provided, positioned between two fatigue testing frames. The spring limiting mechanism includes a positioning bracket, a double-threaded screw, a limiting drive block, a micro motor, a connecting arm, and a spring clamping ring. The positioning bracket has a horizontally arranged double-threaded screw, with both ends rotatably connected to the left and right sides of the bracket. The left and right sides of the double-threaded screw are symmetrically threaded with limiting drive blocks. The rear sides of the two limiting drive blocks are slidably connected to the inner wall surface of the positioning bracket. Spring clamping rings are fixedly connected to the front sides of each limiting drive block. A micro motor is fixedly connected to the outer side of the positioning bracket, and the output end of the micro motor is drively connected to the double-threaded screw.

[0007] Preferably, the spring to be tested is disposed between the two spring clamping rings.

[0008] Preferably, a rotating disk is provided between the two fatigue testing frames, and a motor is provided at the lower end of the rotating disk, with the output end of the motor being connected to the rotating disk for transmission.

[0009] Preferably, fixed arms are fixedly connected to both sides of the motor, and the ends of the two fixed arms away from the motor are respectively fixedly connected to the inside of two fatigue testing frames.

[0010] Preferably, the lower end of the rotating disk is fitted onto the upper surface of the support frame, and the lower end of the support frame is fixedly connected to the inner side of the two fatigue test frames.

[0011] Preferably, the inner sides of both fatigue testing frames are provided with hydraulic push rods, the fixed ends of the two hydraulic push rods are fixedly connected to the two fatigue testing frames respectively, and the free ends of the two hydraulic push rods are respectively connected to fatigue testing rings and fatigue detection rings.

[0012] Preferably, the left and right surfaces of the double-threaded screw are provided with thread structures in opposite directions.

[0013] Compared with related technologies, the spring fatigue testing machine provided by this utility model has the following beneficial effects: By using a spring limiting mechanism, when testing the fatigue strength of a spring, the spring to be tested is placed on two spring clamping rings. The micro motor is started, causing the double-threaded screw to rotate, driving the two limiting drive blocks to move synchronously towards the center. The spring clamping rings fixed to the front of the limiting drive blocks also move synchronously towards the center until the spring is firmly clamped from both ends. After the test is completed, the micro motor is started in reverse, causing the double-threaded screw to rotate in the opposite direction, driving the two limiting drive blocks to move synchronously outward. The spring clamping rings release their grip on the spring, and the tested spring can be removed. The operator only needs to press a button to complete the clamping and releasing of the spring, which greatly shortens the preparation time before the test and the disassembly time after the test, and significantly improves the overall testing efficiency.

[0014] When testing the fatigue strength of a spring using a rotating disk, a motor drives the disk to rotate at a constant speed. When the spring to be tested rotates to below the left fatigue test ring, a hydraulic push rod is activated, and the fatigue test ring at its free end moves downward, repeatedly compressing the spring at a high frequency to simulate its fatigue state during actual operation. After the fatigue test is completed, the hydraulic push rod returns to its original position. At this time, the motor is activated, driving the rotating disk to rotate 180 degrees. After the rotation is complete, the fatigued spring is transferred to directly below the fatigue detection ring. Then, another hydraulic push rod is activated, and the fatigue detection ring at its free end moves downward, pressing down on the fatigue-tested spring to measure its current stiffness and elastic deformation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the axial three-dimensional structure of the present invention; Figure 2 This is a top-view three-dimensional structural diagram of the present invention; Figure 3 This is a bottom-view three-dimensional structural diagram of the present invention; Figure 4 This is a schematic diagram of the spring limiting mechanism in this utility model; In the diagram: 1. Fatigue testing frame; 2. Spring limiting mechanism; 201. Positioning bracket; 202. Double threaded screw; 203. Limiting drive block; 204. Micro motor; 205. Connecting arm; 206. Spring clamping ring; 3. Rotary disk; 4. Motor; 5. Spring to be tested; 6. Support frame; 7. Fixed arm; 8. Hydraulic push rod; 9. Fatigue testing ring; 10. Fatigue detection ring. Detailed Implementation

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0017] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. Example

[0018] A preferred embodiment of the spring fatigue testing machine provided by this utility model is as follows: Figures 1 to 4 As shown: A spring fatigue testing machine includes: two fatigue testing frames 1; a spring limiting mechanism 2; the spring limiting mechanism 2 is disposed between the two fatigue testing frames 1, and the spring limiting mechanism 2 includes a positioning bracket 201, a double threaded screw 202, a limiting drive block 203, a micro motor 204, a connecting arm 205, and a spring clamping ring 206. The double threaded screw 202 is horizontally arranged inside the positioning bracket 201. The two ends of the double threaded screw 202 are rotatably connected to the left and right sides inside the positioning bracket 201. The left and right sides of the double threaded screw 202 are symmetrically threaded to the limiting drive block 203. The rear sides of the two limiting drive blocks 203 are slidably connected to the inner wall surface of the positioning bracket 201. The front sides of the two limiting drive blocks 203 are fixedly connected to the spring clamping ring 206. The micro motor 204 is fixedly connected to the outside of the positioning bracket 201. The output end of the micro motor 204 is connected to the double threaded screw 202 for transmission.

[0019] In this embodiment, when testing the fatigue strength of a spring, the spring to be tested 5 is placed between two spring clamping rings 206. The micro motor 204 is activated, causing the double-threaded screw 202 to rotate, driving the two limit drive blocks 203 to move synchronously towards the center. The spring clamping rings 206, fixed to the front of the limit drive blocks 203, also move synchronously towards the center until the spring is firmly clamped from both ends. After the test is completed, the micro motor 204 is activated in reverse, causing the double-threaded screw 202 to rotate in the opposite direction, driving the two limit drive blocks 203 to move synchronously outward. The spring clamping rings 206 release their grip on the spring, allowing the tested spring to be removed. The operator only needs to press a button to clamp and release the spring, greatly shortening the preparation time before testing and the disassembly time after testing, significantly improving overall testing efficiency.

[0020] In a further preferred embodiment of this utility model, a test spring 5 is provided between the two spring clamping rings 206.

[0021] In this embodiment, the spring clamping ring 206 is semi-circular in shape.

[0022] In a further preferred embodiment of this utility model, the left and right surfaces of the double-threaded screw 202 are provided with thread structures in opposite directions.

[0023] In this embodiment, by adopting a threaded structure in opposite directions, the two limit drive blocks 203 can move synchronously towards or away from each other at the same speed, thereby achieving rapid centering and clamping of the spring and ensuring uniform and symmetrical clamping force. Example

[0024] Based on Embodiment 1, a preferred embodiment of the spring fatigue testing machine provided by this utility model is as follows: Figures 1 to 4 As shown: A rotating disk 3 is set between two fatigue testing frames 1. A motor 4 is set at the lower end of the rotating disk 3. The output end of the motor 4 is connected to the rotating disk 3 for transmission. Fixed arms 7 are fixedly connected to both sides of the motor 4. The ends of the two fixed arms 7 away from the motor 4 are fixedly connected to the inner side of the two fatigue testing frames 1 respectively. The lower end of the rotating disk 3 is attached to the upper surface of the support frame 6. The lower end of the support frame 6 is fixedly connected to the inner side of the two fatigue testing frames 1.

[0025] In this embodiment, when testing the fatigue strength of the spring, the motor 4 drives the rotating disk 3 to rotate at a constant speed. When the spring 5 to be tested rotates to below the left fatigue test ring 9, the hydraulic push rod 8 is activated, and the fatigue test ring 9 at its free end moves downward to repeatedly and frequently compress the spring, simulating its fatigue state in actual operation. After the fatigue test is completed, the hydraulic push rod 8 is reset. At this time, the motor 4 is activated, driving the rotating disk 3 to rotate 180 degrees. After the rotation is completed, the fatigued spring is transferred to directly below the fatigue detection ring 10. Then, another hydraulic push rod 8 is activated, and the fatigue detection ring 10 at its free end moves downward to press down on the spring that has undergone the fatigue test, thereby measuring its current stiffness and elastic deformation.

[0026] In a further preferred embodiment of the present invention, hydraulic push rods 8 are provided on the inner sides of the two fatigue testing frames 1. The fixed ends of the two hydraulic push rods 8 are fixedly connected to the two fatigue testing frames 1 respectively, and the free ends of the two hydraulic push rods 8 are respectively connected to fatigue testing rings 9 and fatigue detection rings 10.

[0027] In this embodiment, a pressure sensor and a displacement sensor are installed inside the fatigue detection ring 10.

[0028] In summary, operators can clamp and release the spring simply by pressing a button, greatly reducing preparation time before testing and disassembly time after testing, and significantly improving overall testing efficiency.

[0029] It is worth noting that the circuits, electronic components, and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0030] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative; the division of units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; the indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0031] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A spring fatigue testing machine, characterized in that, include: Two fatigue testing fixtures (1); Spring limiting mechanism (2); the spring limiting mechanism (2) is set between two fatigue test frames (1), and the spring limiting mechanism (2) includes a positioning bracket (201), a double threaded screw (202), a limiting drive block (203), a micro motor (204), a connecting arm (205), and a spring clamping ring (206). The positioning bracket (201) has a double threaded screw (202) arranged laterally inside, and the two ends of the double threaded screw (202) are rotatably connected to the positioning bracket (201). On the left and right sides inside, the double threaded screw (202) is symmetrically threaded with limit drive blocks (203). The rear sides of the two limit drive blocks (203) are slidably connected to the inner wall surface of the positioning bracket (201). The front sides of the two limit drive blocks (203) are fixedly connected with spring clamping rings (206). The outer side of the positioning bracket (201) is fixedly connected with a micro motor (204). The output end of the micro motor (204) is connected to the double threaded screw (202) for transmission.

2. The spring fatigue testing machine as described in claim 1, characterized in that, A test spring (5) is placed between the two spring clamping rings (206).

3. The spring fatigue testing machine as described in claim 1, characterized in that, A rotating disk (3) is provided between the two fatigue test frames (1), and a motor (4) is provided at the lower end of the rotating disk (3). The output end of the motor (4) is connected to the rotating disk (3) for transmission.

4. The spring fatigue testing machine as described in claim 3, characterized in that, Both sides of the motor (4) are fixedly connected to fixed arms (7), and the ends of the two fixed arms (7) away from the motor (4) are respectively fixedly connected to the inside of the two fatigue test frames (1).

5. The spring fatigue testing machine as described in claim 3, characterized in that, The lower end of the rotating disk (3) is attached to the upper surface of the support frame (6), and the lower end of the support frame (6) is fixedly connected to the inner side of the two fatigue test frames (1).

6. The spring fatigue testing machine as described in claim 1, characterized in that, Hydraulic push rods (8) are provided on the inner side of both fatigue test frames (1). The fixed ends of the two hydraulic push rods (8) are fixedly connected to the two fatigue test frames (1) respectively. The free ends of the two hydraulic push rods (8) are respectively connected to fatigue test rings (9) and fatigue detection rings (10).

7. The spring fatigue testing machine as described in claim 1, characterized in that, The left and right surfaces of the double-threaded screw (202) are provided with thread structures in opposite directions.

Images