Belleville spring limiting gasket

Abstract

A belleville spring limiting gasket comprises an annular body, an annular frustum and an annular plane which are concentric with the annular body are arranged at the upper end of the annular body, the annular plane is located on the periphery of the annular frustum and lower than the annular frustum, and the lower end of the annular body is a plane. Line contact of a pressure-bearing surface is converted into surface contact through the annular frustum on the upper surface, so that the supporting strength of the limiting gasket is improved, and the service life of the limiting gasket is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of disc spring gaskets, in particular to a disc spring limit gasket. Background Art

[0002] A disc spring is a disc-shaped spring that bears axial load, which is divided into two types: without a supporting surface and with a supporting surface. It can be used alone or combined in pairs, stacked, or compounded into a disc spring group. The disc spring usually deforms axially. In some application scenarios, a disc spring limit gasket is axially installed along the disc spring to adjust the compression height of the disc spring. This gasket usually has a flat plate as the main body, and annular bosses are provided on both sides of the flat plate main body to limit the maximum compression height of the disc spring, thereby meeting the requirements of a specific disc spring load deformation characteristic curve. However, the contact surface between the above gasket and the disc spring is a line contact, and its bearing surface is small, so it is easy to be damaged and has a short service life under long-term load. Content of the Utility Model

[0003] The utility model provides a disc spring limit gasket to overcome the deficiencies of the prior art.

[0004] The technical solution adopted by the utility model is: a disc spring limit gasket, including an annular body, the upper end of the annular body has an annular frustum and an annular plane concentric with the annular body, the annular plane is located outside the annular frustum and lower than the annular frustum, and the lower end of the annular body is a plane.

[0005] The cone angle α of the annular frustum is consistent with the inner cone angle after the disc spring deforms.

[0006] The height H of the annular frustum is less than or equal to the compression height of the disc spring.

[0007] The outer diameter of the annular frustum is less than the outer diameter of the disc spring and greater than the inner diameter of the disc spring.

[0008] Compared with the prior art, the beneficial effects of the utility model are:

[0009] (1) The bearing surface is changed from line contact to surface contact through the annular frustum on the upper surface, improving the support strength and service life of the limit gasket.

[0010] (2) By adjusting the overall design thickness of the limit gasket, it can be adapted to single disc springs and different combination methods, reducing the tooling manufacturing cost and assembly difficulty of the limit gasket;

[0011] (3) By adjusting the design angle of the annular frustum of the limit gasket, the maximum compression amount of the disc spring can be changed to cope with different working conditions.

[0012] (4) When multiple disc springs are used in a group, the initial stiffness of the disc spring group can be reduced to meet the usage requirements of special working conditions. Brief Description of the Drawings

[0013] Figure 1 is a schematic structural view of the present utility model;

[0014] Figure 2 is a schematic view of the usage state of the present utility model. Detailed Embodiment

[0015] The following combines the attached Figure 1-2 drawings and detailed embodiments to describe the present utility model in detail.

[0016] A disc spring limiting gasket includes an annular body 1. The upper end of the annular body 1 has an annular frustum 1-1 and an annular plane 1-2 that are concentric with the annular body 1. The annular plane 1-2 is located outside the annular frustum 1-1 and is lower than the annular frustum 1-1. The lower end of the annular body 1 is a plane. The outer diameter of the annular frustum 1-1 is smaller than the outer diameter of the disc spring and larger than the inner diameter of the disc spring.

[0017] In one embodiment, in order to ensure that the disc spring can have a large surface contact with the annular frustum after deformation, the cone angle α of the annular frustum 1-1 is the same as the inner cone angle after the disc spring is deformed. Thus, the support strength is improved and the service life is extended.

[0018] In one embodiment, in order to limit the maximum working height of the disc spring, the height H of the annular frustum 1-1 is lower than or equal to the compression height of the disc spring 3.

[0019] During specific use, see Figure 2 , place the disc spring 3 on the upper annular plane 1-2 of the limiting gasket 2. After the disc spring 3 undergoes elastic deformation under the action of an axial external force, the lower end surface of the disc spring forms a surface contact with the conical surface of the annular frustum 1-1.

[0020] Among them, the annular plane 1-2 is used to support the load of the disc spring before reaching the predetermined compression amount. After the disc spring reaches the predetermined compression amount, the annular frustum 1-1 bears the load of the disc spring, and at the same time, the line contact is converted into surface contact, greatly improving the support strength and service life of the limiting gasket.

[0021] It should be noted that this limiting gasket can be used for a single disc spring, or for a disc spring group formed by facing combination, stacking combination, or composite combination. The thickness of this limiting gasket is determined according to the load of the disc spring, and its minimum thickness must meet the usage requirements of the load; the cone angle α of the annular frustum 1-1 is the same as the inner cone angle formed after the disc spring reaches the design deformation.

[0022] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, all equivalent changes made in accordance with the content described in the claims of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A conical spring limit gasket, characterized in that: It includes an annular body (1). The upper end of the annular body (1) has an annular frustum (1-1) and an annular plane (1-2) that are concentric with the annular body (1). The annular plane (1-2) is located on the periphery of the annular frustum (1-1) and is lower than the annular frustum (1-1). The lower end of the annular body (1) is a plane.

2. The disc spring limit gasket according to claim 1, characterized in that: The cone angle α of the annular frustum (1-1) is consistent with the inner cone angle after the disc spring is deformed.

3. The disc spring limit gasket according to claim 1, characterized in that: The height H of the annular frustum (1-1) is less than or equal to the compression height of the disc spring.

4. The disc spring limit gasket according to claim 1, characterized in that: The outer diameter of the annular frustum (1-1) is less than the outer diameter of the disc spring and greater than the inner diameter of the disc spring.

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