Large-wire-diameter spring fatigue strength testing device
By designing a fatigue strength test device for large-wire-diameter springs, the spring is stretched to a specific length using the structural frame and limiting mechanism, and the gap between adjacent rings is observed, the problem of low fatigue strength testing efficiency of large-wire-diameter springs is solved, and a fast and accurate fatigue strength evaluation is achieved.
Patent Information
- Application Number
- CN202422238199.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-12
AI Technical Summary
In the prior art, the fatigue strength testing efficiency of large wire diameter tensile springs is not high, and it is difficult to quickly determine whether they meet the design requirements.
A large wire diameter spring fatigue strength test device is designed, including a structural frame, mounting slot, pin, fastening assembly and limiting mechanism. The spring to be tested is stretched to a specific length and maintained through the limiting mechanism, and the gap between adjacent rings is observed to evaluate the fatigue strength.
It realizes efficient and quick determination of whether the fatigue strength of the large wire-diameter spring meets the design requirements, and the testing process is simple and accurate.
Smart Images
Figure CN223091504U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of spring testing, in particular to a fatigue strength testing device for large wire diameter springs. Background Art
[0002] A spring is a mechanical part that utilizes the elasticity and structural characteristics of materials to generate deformation during operation, converting mechanical work or kinetic energy into deformation energy, or converting deformation energy into mechanical work or kinetic energy.
[0003] For existing cylindrical helical extension springs, the wire diameter does not exceed 20 mm. However, in the transportation and operation of large-scale precision instruments, extension springs with large wire diameters are required. The performance of extension springs needs to be tested before application, such as the relatively common fatigue strength. Currently, the fatigue strength testing of extension springs is often inefficient. Summary of the Utility Model
[0004] In order to solve at least one technical problem mentioned in the background art, the purpose of the utility model is to provide a fatigue strength testing device for large wire diameter springs, which can efficiently determine whether the fatigue strength of the spring to be tested meets the design requirements.
[0005] To achieve the above purpose, the utility model provides the following technical solutions:
[0006] A fatigue strength testing device for large wire diameter springs includes a structural frame, on which a plurality of installation slots are arranged horizontally; at the bottom of each installation slot, a pin shaft for connecting one end of the spring to be tested is fixedly installed, and above each pin shaft, a fastening assembly for connecting the other end of the spring to be tested is movably arranged vertically. A slot for the fastening assembly to pass through is arranged at the top of the structural frame; a limiting mechanism for limiting the fastening assembly at the top of the structural frame is also included.
[0007] In some embodiments of the utility model, the limiting mechanism includes an insertion plate and a step arranged on the fastening assembly; when the fastening assembly rises to a position where the step is higher than the top of the structural frame, the insertion plate is inserted between the step and the structural frame.
[0008] In some embodiments of the utility model, a driving mechanism for driving the movement of the fastening assembly is also included.
[0009] In some embodiments of the utility model, the driving mechanism includes a ring and a steel wire rope. The ring is arranged at the top of the fastening assembly, one end of the steel wire rope is connected to the ring, and the other end of the steel wire rope is pulled by a crane.
[0010] In some embodiments of the present utility model, a pulley shaft is provided above the structural frame, and a pulley is provided directly above each ring on the pulley shaft, and the middle part of the steel wire rope bypasses the pulley.
[0011] In some embodiments of the present utility model, a plurality of connecting plates are provided at the rear side of the structural frame, and the connecting plates are fixedly installed on the ground or the wall through bolts.
[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0013] With the device of the present utility model, one end of the spring to be tested is connected to the pin shaft, and the other end is connected to the fastening assembly, and the fastening assembly is lifted to the height at the top of the structural frame for limiting, so that the spring to be tested is stretched to a specific length. After a period of time, the spring to be tested is removed, and the gap between adjacent turns of the spring to be tested is observed, so as to determine whether the fatigue strength of the spring to be tested meets the design requirements. The test process is efficient and fast. Description of the Drawings
[0014] Figure 1 It is a schematic diagram of the overall structure of the present utility model.
[0015] Figure 2 It is a cross-sectional view of the present utility model.
[0016] Figure 3 It is Figure 2 A partial enlarged view before the limit at position A in
[0017] Figure 4 It is Figure 2 A partial enlarged view after the limit at position A in
[0018] In the figure: 1, structural frame; 11, installation slot; 12, slot; 13, connecting plate; 14, bolt; 2, spring to be tested; 3, pin shaft; 4, fastening assembly; 41, step; 42, ring; 5, steel wire rope; 51, installation ring; 6, pulley shaft; 7, pulley; 8, plug board. Detailed Description of the Invention
[0019] The technical solutions in the embodiments of the present utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0020] Please refer to Figure 1 and Figure 2, this embodiment provides a fatigue strength testing device for large wire diameter springs, including a structural frame 1. Along the horizontal direction on the structural frame 1, there are several installation slots 11. In this embodiment, a total of twelve installation slots are provided to achieve synchronous measurement of twelve springs to be tested 2 (specifically tensile springs).
[0021] Specifically, at the bottom of each installation slot 11, a pin shaft 3 for connecting one end of the spring to be tested 2 is fixedly installed. Above each pin shaft 3, a fastening assembly 4 for connecting the other end of the spring to be tested 2 is movably arranged in the vertical direction. Please refer to Figure 3 and Figure 4 , a slot 12 for the fastening assembly 4 to pass through is provided at the top of the structural frame 1. It also includes a limiting mechanism for limiting the fastening assembly 4 at the top of the structural frame 11.
[0022] During operation, first as shown in Figure 3 , both ends of the spring to be tested 2 are respectively connected to the pin shaft 3 and the fastening assembly 4, and then the fastening assembly 4 is pulled upward to stretch the spring to be tested 2 to a specified length. As shown in Figure 4 , at this length, the fastening assembly 4 is exactly at the top of the structural frame 11. The fastening assembly 4 is limited by the limiting mechanism, so that the spring to be tested 2 is kept in the current stretched state. After a period of time, the spring to be tested 2 is removed, and then the gap situation between adjacent coils is observed to determine whether the fatigue strength of the spring to be tested meets the design requirements. The testing process is efficient and fast.
[0023] To achieve the above limiting function, the limiting mechanism includes a plug board 8 and a step 41 provided on the fastening assembly 4. As shown in Figure 4 , when the fastening assembly 4 rises until the step 41 is higher than the top of the structural frame 11, the plug board 8 is inserted between the step 41 and the structural frame 11, which can prevent the fastening assembly 4 from descending, thus keeping the spring to be tested 2 in the stretched state.
[0024] To better realize the pulling of the fastening assembly 4, it also includes a driving mechanism for driving the movement of the fastening assembly 4.
[0025] The driving mechanism includes a ring 42 and a steel wire rope 5. The ring 42 is arranged at the top of the fastening assembly 4. One end of the steel wire rope 5 is connected to the ring 42, and the other end of the steel wire rope 5 is pulled by a crane. It is worth mentioning that an installation ring 51 is also provided at the end of the steel wire rope 5 connected to the ring 42 to better connect with the ring 42.
[0026] To better pull the steel wire rope 5, as shown in Figure 1 and Figure 2As shown in the figure, a pulley shaft 6 is provided above the structural frame 11 in this embodiment. A pulley 7 is provided above each ring 42 on the pulley shaft 6. The middle part of the steel wire rope 5 bypasses the pulley 7, so that the other end of the steel wire rope 5 extends horizontally, which is better connected to the crane.
[0027] In order to fix this device, a plurality of connecting plates 13 are provided at the rear side of the structural frame 1. The connecting plates 13 are fixedly installed on the ground or the wall through bolts 14.
[0028] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed by the present invention.
Claims
1. A fatigue strength testing device for a large wire diameter spring, characterized in that, It includes a structural frame, and a number of mounting slots are arranged horizontally on the structural frame; a pin shaft for connecting one end of the spring to be measured is fixedly installed at the bottom of each mounting slot, and a fastening assembly for connecting the other end of the spring to be measured is movably arranged vertically above each pin shaft. A slot for the fastening assembly to pass through is arranged at the top of the structural frame; a limiting mechanism for limiting the fastening assembly at the top of the structural frame is also included.
2. The fatigue strength testing device for a large wire diameter spring according to claim 1, characterized in that The limiting mechanism includes a plug board and a step arranged on the fastening assembly; when the fastening assembly rises to a position where the step is higher than the top of the structural frame, the plug board is inserted between the step and the structural frame.
3. The fatigue strength testing device for large wire diameter springs according to claim 1, characterized in that A driving mechanism for driving the fastening assembly to move is also included.
4. A large wire diameter spring fatigue strength testing device according to claim 3, characterized in that, The driving mechanism includes a ring and a steel wire rope. The ring is arranged at the top of the fastening assembly, one end of the steel wire rope is connected to the ring, and the other end of the steel wire rope is pulled by a crane.
5. The fatigue strength testing device for large wire diameter springs according to claim 4, characterized in that, A pulley shaft is arranged above the structural frame, and a pulley is arranged directly above each ring on the pulley shaft, and the middle part of the steel wire rope bypasses the pulley.
6. The fatigue strength testing device for large wire diameter springs according to claim 1, characterized in that A number of connecting plates are arranged at the rear side of the structural frame, and the connecting plates are fixedly installed on the ground or the wall through bolts.