Anti-fatigue waveform elastic sheet

Abstract

The invention discloses an anti-fatigue waveform elastic sheet. According to the scheme, the structure comprises supporting rings at the two ends and a corrugated structure in the middle, one-time forming is achieved through the stamping technology, the supporting ring at one end abuts against the top of a motor shaft, and each layer of the corrugated structure is provided with 1.5 waves. According to the corrugated structure provided in the scheme, contact points are fewer, when the wave-shaped elastic piece is stressed, force distribution is relatively more uniform, and the fatigue resistance is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical parts, and in particular to an anti-fatigue corrugated spring. Background Art

[0002] Traditional motor shaft support structures usually use springs or elastic washers. The wave number design of traditional corrugated springs can easily lead to too many contact points, resulting in significant stress concentration when subjected to force, which accelerates material fatigue damage.

[0003] Therefore, it is necessary to design a corrugated spring with uniform stress distribution, excellent fatigue resistance and easy manufacturing. Summary of the invention

[0004] In order to solve the above problems, this solution provides an anti-fatigue corrugated spring.

[0005] To achieve the above purpose, the technical solution adopted in this scheme is: a fatigue-resistant corrugated spring piece for supporting the motor shaft, including support rings at both ends and a corrugated structure in the middle, which is formed in one step through a stamping process, and the support ring at one end is against the top of the motor shaft, and each layer of the corrugated structure is 1.5 waves.

[0006] Furthermore, the total height of the support ring and the corrugated structure is 5.3-6.3 mm.

[0007] Furthermore, the total height of the support ring and the corrugated structure is 5.8 mm.

[0008] Furthermore, the outer diameter of the support ring is 7.6-8 mm, and the inner diameter is 6-6.4 mm.

[0009] Furthermore, the outer diameter of the support ring is 7.8 mm and the inner diameter is 6.2 mm.

[0010] Furthermore, the support ring has a width of 0.78-0.8 mm and a thickness of 0.18-0.2 mm.

[0011] Furthermore, the support ring has a width of 0.8 mm and a thickness of 0.2 mm.

[0012] In summary, this solution has the following advantages:

[0013] The corrugated structure provided by this solution has 1.5 waves per layer. Compared with the prior art, this solution has fewer contact points. When the corrugated spring is subjected to stress, the force distribution is relatively more uniform, and local stress concentration is less likely to occur. Stress concentration is one of the important factors leading to material fatigue damage. When the corrugated spring is subjected to relatively uniform stress, the damage to its internal microstructure will develop relatively slowly, thereby improving fatigue resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of an anti-fatigue corrugated spring washer;

[0015] Figure 2 It is a physical diagram of an anti-fatigue corrugated spring washer;

[0016] Figure 3 It is a physical diagram of the anti-fatigue corrugated spring washer from another perspective;

[0017] Wherein:

[0018] 1. Support ring; 2. Corrugated structure. Specific implementation mode

[0019] The following further describes the present solution in conjunction with the accompanying drawings and embodiments:

[0020] Embodiment 1:

[0021] An anti-fatigue corrugated spring washer is installed in the through hole of the fitting and is used to support the motor shaft. As Figures 1-3 shown, it includes support rings 1 at both ends and a corrugated structure 2 in the middle. It is formed in one step by stamping. One support ring 1 at one end abuts against the top of the motor shaft, and each layer of the corrugated structure 2 has 1.5 waves.

[0022] In the present solution, the corrugated structure 2 has 1.5 waves per layer. After the corrugated spring washer of the corrugated structure 2 is pressed down by 2 mm, the generated elastic force is 3 N.

[0023] Compared with the prior art, the present solution has fewer contact points. When the corrugated spring washer is stressed, the force distribution is relatively more uniform, and it is not easy to have the situation of local stress concentration. And stress concentration is one of the important factors leading to material fatigue damage. When the stress on the corrugated spring washer is relatively uniform, the damage development of its internal microstructure will be relatively slow, thereby improving the fatigue resistance.

[0024] The main body of the corrugated spring washer is made of stainless steel material or alloy structural steel, and has good elasticity and fatigue strength. In this embodiment, the main body of the corrugated spring washer is made of stainless steel material, and the model can be 304, SUS631 J1-CSP, 301H, X10CrTi 189 or other models that meet the characteristics of the present solution. Preferably 301H, 301H stainless steel is easy to produce work hardening when impacted by external force, can absorb more impact energy, has good abrasion resistance and fatigue strength, and also has a relatively high cost performance.

[0025] The outer diameter of the support ring 1 is 7.6 - 8 mm, the inner diameter is 6 - 6.4 mm, the width is 0.78 - 0.8 mm, and the thickness is 0.18 - 0.2 mm; in the through-hole of the assembly, the support ring 1 at one end of the corrugated spring plate abuts against the top of the motor shaft. The total height of the support ring 1 and the corrugated structure 2 is 5.3 - 6.3 mm. By optimizing the collaborative design of the support ring 1 and the corrugated structure 2, the dynamic balance between the axial stiffness and the radial elasticity is achieved.

[0026] In this embodiment, the outer diameter of the support ring 1 is 7.8 mm, the inner diameter is 6.2 mm, the width is 0.8 mm, and the thickness is 0.2 mm; the total height of the support ring 1 and the corrugated structure 2 is 5.8 mm.

[0027] To verify the material properties of this solution, performance tests are carried out on the product, and the test content is fatigue life.

[0028] The specific test method, test standard and test instrument are as follows:

[0029] Test method:

[0030] S1. Sampling

[0031] Take five finished products of anti-fatigue corrugated spring plates as test objects;

[0032] S2. Place the samples

[0033] As shown in the figure, in this experiment, first place the test samples evenly on the test platform of the fatigue testing machine to ensure that the samples are in a vertical state;

[0034] Adjust the test distance of the fatigue testing machine to 4 mm.

[0035] S3. Fatigue test

[0036] Set the test range to L = 4 - 2 mm, cycle 100,000 times, measure the force value at 2 mm, measure the height and the force value, and record and compare the data before the test, after 50,000 cycles, after 100,000 cycles, and the force value data respectively.

[0037] Test standard: The smaller the attenuation rate, the more fatigue-resistant.

[0038] Test instrument: Spring fatigue testing machine.

[0039] Finally, the test results are obtained as shown in the table:

[0040]

[0041] During the test, based on fatigue testing, the force attenuation rate of the anti-fatigue corrugated springs was less than 1.5% (during each test, the error of the spring fatigue testing machine caused slight differences in the results, and the negative data was caused by the error. In actual situations, there was no attenuation).

[0042] The following conclusions were drawn from the analysis of the test results: the anti-fatigue corrugated spring provided by this solution has fatigue resistance.

[0043] Further explanation in combination with its usage mechanism:

[0044] During operation, when the brushless motor vibrates, the corrugated spring uses its own elastic deformation to absorb and buffer the vibration energy, dispersing and weakening the violent vibration that was originally transmitted directly to the motor housing and surrounding structures. The corrugated structure 2 makes the friction between the spring and the air softer during the vibration process, reducing the noise generated by air disturbance.

[0045] In summary, the corrugated structure provided by the present application has a wave number of 1.5 per layer. Compared with the prior art, the present solution has fewer contact points. When the corrugated spring piece is subjected to stress, the force distribution is relatively more uniform, and local stress concentration is less likely to occur. Stress concentration is one of the important factors leading to material fatigue damage. When the stress on the corrugated spring piece is relatively uniform, the damage to its internal microstructure will develop relatively slowly, thereby improving fatigue resistance.

[0046] The above implementation is only to illustrate the technical concept and features of this solution, and its purpose is to enable people familiar with this technology to understand the content of this solution and implement it accordingly, and it cannot be used to limit the protection scope of this solution. Any equivalent transformation or modification made according to the spirit of this solution should be included in the protection scope of this solution.

[0047] In the description of this scheme, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0048] For those skilled in the art, the specific meanings of the above terms in this solution can be understood according to specific circumstances.

[0049] It should be understood that the above-mentioned embodiments are merely illustrative and not restrictive. Without departing from the basic principles of the present solution, various obvious or equivalent modifications or substitutions that can be made by technicians in this field to the above details will be included in the protection scope of the present solution.

Claims

1. An anti-fatigue corrugated spring piece installed in a through hole of an assembly part for supporting a motor shaft, characterized in that: It comprises support rings (1) at two ends and a corrugated structure (2) in the middle, which are formed in one step through a stamping process. The support ring (1) at one end abuts against the top of the motor shaft, and each layer of the corrugated structure (2) has 1.5 waves.

2. The anti-fatigue corrugated spring piece according to claim 1, characterized in that: The total height of the support ring (1) and the corrugated structure (2) is between 5.3 and 6.3 mm.

3. The anti-fatigue corrugated spring piece according to claim 2, characterized in that: The total height of the support ring (1) and the corrugated structure (2) is 5.8 mm.

4. The anti-fatigue corrugated spring piece according to claim 3, characterized in that: The outer diameter of the support ring (1) is 7.6-8 mm, and the inner diameter is 6-6.4 mm.

5. The anti-fatigue corrugated spring piece according to claim 4, characterized in that: The outer diameter of the support ring (1) is 7.8 mm, and the inner diameter is 6.2 mm.

6. The anti-fatigue corrugated spring piece according to claim 5, characterized in that: The support ring (1) has a width of 0.78-0.8 mm and a thickness of 0.18-0.2 mm.

7. The anti-fatigue corrugated spring piece according to claim 6, characterized in that: The support ring (1) has a width of 0.8 mm and a thickness of 0.2 mm.

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