Curved surface belleville spring

Abstract

The utility model discloses a curved surface belleville spring, the upper end surface and the lower end surface of the cross section of a belleville spring body are wave-shaped, the upper end surface of the cross section of the belleville spring body is provided with an odd number A of wave crests, wave troughs and the wave crests on the cross section of the belleville spring body are arc-shaped, and the radian radius R0 of the wave crests and the radian radius R0 of the wave troughs are the same. The ratio of the maximum compression amount h0 of the belleville spring body to the thickness t of the belleville spring body is larger than or equal to 1.6 and smaller than or equal to 3, the ratio of the outer diameter phi D to the inner diameter phi d of the belleville spring body 1 is larger than or equal to 1.8 and smaller than or equal to 3, and the ratio of the arc radius R0 of the wave, the peak and the trough to the thickness t of the belleville spring body is larger than or equal to 6 and smaller than or equal to 10. The stress distribution and the bearing characteristic are optimized through the structural design of the curved surface belleville spring, the stress concentration of the belleville spring is reduced, and the buffering capacity and the fatigue resistance of the spring are improved; and after the compression amount of the curved surface belleville spring reaches a certain amount, the rigidity tends to be constant rigidity, and stable pre-tightening force can be provided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a spring, especially a curved surface disc spring. BACKGROUND

[0002] As a basic part in mechanical equipment, the spring is used in many fields in modern industry, especially in the mechanical industry, the railway industry, the construction industry, the nuclear power industry and other fields. The disc spring parameters generally consist of the outer diameter D, the inner diameter d, the thickness t, the taper height h0 and the free height H. The commonly used disc spring shape is a circular ring with a certain taper, which provides axial pre-tightening force during work, and plays the roles of sealing, energy storage, shock absorption and the like; the disc spring mainly provides axial pre-tightening force during work, in the prior art, the pre-tightening force of the disc spring will decrease after being compressed to a certain extent, which cannot meet the requirements of the use scene; but in the actual application working condition, some special scenes require the disc spring to reach a certain amount of compression, and the rigidity tends to be constant rigidity, that is, the disc spring compression increases, and the pre-tightening force changes little, and can reduce stress concentration, improve the buffering capacity and fatigue resistance of the spring, and a disc spring capable of providing stable pre-tightening force is required. SUMMARY

[0003] Therefore, the utility model wants to solve the technical problem: provide a kind of curved surface disc spring that design is reasonable, can reduce stress concentration, improve the buffering capacity and fatigue resistance of spring, rigidity tends to be constant rigidity after compression reaches a certain amount.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions to realize:

[0005] A curved surface disc spring, comprising a disc spring body, the upper and lower end surfaces of the cross section of the disc spring body are in wave shape, the upper end surface of the cross section of the disc spring body is provided with an odd number A of wave peaks, the wave valleys and the wave peaks on the cross section of the disc spring body are in arc shape, the wave peak arc of the upper end surface of the cross section of the disc spring body is the same as that of the lower end surface, the wave valley arc of the upper end surface of the cross section of the disc spring body is the same as that of the lower end surface, the wave peak and the wave valley have the same arc radius R0, the ratio of the maximum compression amount h0 of the disc spring body to the thickness t of the disc spring body is 1.6≤h0 / t≤3, the ratio of the outer diameter φD of the disc spring body to the inner diameter φd is 1.8≤φD / φd≤3, and the ratio of the arc radius R0 of the wave peak and the wave valley to the thickness t of the disc spring body is 6≤R0 / t≤10.

[0006] As a preferred, the value range of the odd number A is 3≤A≤9; the odd number of wave peaks can reduce the stress concentration of the disc spring and improve the problem of insufficient symmetry; the multi-wave peak structure can improve the buffering capacity and fatigue resistance of the spring through the deformation coordination between the wave peaks; and the service life of the disc spring is prolonged.

[0007] As a preference, A=3.

[0008] As a preference, φD / φd=3.

[0009] As a preference, h0 / t=1.7.

[0010] As a preference, 7≤R0 / t≤9.

[0011] As a preference, R0 / t=9.

[0012] The above technical solutions can be used to achieve the beneficial effects of the present application, which are as follows:

[0013] Compared with the prior art, the present application realizes a multi-peak structure through the structural design of the curved disc spring, each peak can be deformed independently or cooperatively under axial load, thereby optimizing stress distribution and load-bearing characteristics, reducing stress concentration of the disc spring, and improving the buffering capacity and fatigue resistance of the spring through deformation coordination between the peaks; the service life of the disc spring is prolonged, and the rigidity of the curved disc spring tends to be constant when the compression amount reaches a certain amount, that is, the compression amount of the disc spring increases, but the pre-tightening force changes little, which can provide stable pre-tightening force. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a top view structural schematic diagram of the present application;

[0015] Figure 2 is Figure 1 is a cross-sectional structural schematic diagram of A-A direction;

[0016] Figure 3 is a force value characteristic comparison schematic diagram of the present application and a conventional disc spring. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to further understand the features and technical contents of the present application, please refer to the following detailed description and drawings of the present application.

[0018] As Figures 1-3The curved disc spring shown comprises a disc spring body, upper and lower end surfaces of a section of the disc spring body are in a wave shape, an upper end surface of the section of the disc spring body is provided with an odd number A of wave crests 100, the wave troughs 102 on the section of the disc spring body and the wave crests 100 are all in an arc shape, the wave crests 100 on the upper end surface of the section of the disc spring body and the wave crests 100 on the lower end surface are of the same arc, the wave troughs 102 on the upper end surface of the section of the disc spring body and the wave troughs 102 on the lower end surface are of the same arc, the wave crests 100 and the wave troughs 102 are of the same arc radius R0, a ratio of a maximum compression amount h0 of the disc spring body to a thickness t of the disc spring body satisfies 1.6 ≤ h0 / t ≤ 3, a ratio of an outer diameter φD of the disc spring body 1 to an inner diameter φd satisfies 1.8 ≤ φD / φd ≤ 3, and a ratio of the arc radius R0 of the wave crest and the wave trough to the thickness t of the disc spring body satisfies 6 ≤ R0 / t ≤ 10.

[0019] Embodiments of the present application

[0020] As Figures 1-2 shown, the upper end surface of the section of the disc spring body is provided with an odd number A of wave crests, A=3; a height of a highest point of an inner diameter of the curved disc spring to a lowest point of a lower end surface of an outer diameter is H, a ratio of the outer diameter φD of the disc spring body 1 to the inner diameter φd satisfies φD / φd=3; a ratio of the maximum compression amount h0 of the disc spring body to the thickness t of the disc spring body satisfies h0 / t=1.7; and a ratio of the arc radius R0 of the wave crest and the wave trough to the thickness t of the disc spring body satisfies R0 / t=9.

[0021] As Figures 1-3 shown, the curved disc spring is provided with a plurality of wave crests, each wave crest 100 can be deformed independently or cooperatively under axial load during use, so that stress distribution and load bearing characteristics are optimized, the odd number of wave crests 100 can reduce stress concentration of the curved disc spring and improve the problem of insufficient symmetry; the plurality of wave crests can improve the buffering capacity and fatigue resistance of the spring through deformation coordination between the wave crests; and the service life of the disc spring is prolonged; meanwhile, in a specific working scenario, the stiffness of the curved disc spring tends to be constant when the compression amount of the curved disc spring reaches a certain amount, that is, the pre-tightening force changes little when the compression amount of the disc spring increases to a certain value, so that stable pre-tightening force can be provided.

[0022] However, the above-mentioned is only a preferred and feasible embodiment of the present application, and is not intended to limit the patent range of the present application, so that equivalent structural changes made by applying the content of the present application specification and drawings are also reasonably included in the range of the present application.

Claims

1. A curved disc spring comprising a disc spring body, characterized in that: The upper and lower end surfaces of the cross section of the disc spring body (1) are in a wave shape, the upper end surface of the cross section of the disc spring body (1) is provided with an odd number A of wave crests (100), the wave troughs (102) and the wave crests (100) on the cross section of the disc spring body (1) are in an arc shape, the wave crests (100) on the upper end surface of the cross section of the disc spring body (1) and the wave crests (100) on the lower end surface are in the same arc, the wave troughs (102) on the upper end surface of the cross section of the disc spring body (1) and the wave troughs (102) on the lower end surface are in the same arc, the wave crests (100) and the wave troughs (102) are in the same arc radius R0, the ratio of the maximum compression amount h0 of the disc spring body to the thickness t of the disc spring body is 1.6≤h0 / t≤3, the ratio of the outer diameter φD of the disc spring body (1) to the inner diameter φd is 1.8≤φD / φd≤3, and the ratio of the arc radius R0 of the wave crest and the wave trough to the thickness t of the disc spring body is 6≤R0 / t≤10.

2. A curved disc spring as claimed in claim 1, characterized in that: The 3≤A≤9.

3. A curved disc spring as claimed in claim 2, characterized in that: The A=3.

4. A cupped spring according to claim 1, wherein: The φD / φd=3.

5. A cupped spring according to claim 1, wherein: The h0 / t=1.

7.

6. A cupped spring according to claim 1, wherein: The 7≤R0 / t≤9.

7. A curved disc spring as claimed in claim 6, characterized in that: The R0 / t=9.

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