CN114060441A

CN114060441A - Wave spring

Info

Publication number: CN114060441A
Application number: CN202111582642.3A
Authority: CN
Inventors: 柴延辉
Original assignee: Shenzhen Ubtech Technology Co ltd
Current assignee: Shenzhen Ubtech Technology Co ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-02-18

Abstract

The invention provides a wave spring, and relates to the technical field of vibration reduction and buffering. The wave spring is formed by spirally winding a plurality of coils in a wavy manner along a central axis by strip-shaped sheets, each coil of the wave spring comprises a plurality of wave crests and wave troughs, the wave crest of each coil of the wave spring corresponds to the wave trough of an adjacent coil, and a pitch height exists between the wave crest of a lower coil and the wave trough of an adjacent upper coil. On the basis of the variable stiffness of the traditional wave spring, the constant stiffness working range which is the same as that of the traditional compression spring is increased, so that the wave spring provided by the invention has the characteristics that the stiffness is firstly constant and then is increased on the same spring, the complexity of the stiffness change of the spring is increased, and the wave spring can be applied to more complex spring stiffness requirement scenes that the load and the deformation are large, the stiffness change is adjustable and the like are required at the same time.

Description

Wave spring

Technical Field

The invention relates to the technical field of vibration reduction and buffering, in particular to a wave spring.

Background

The spring as a common elastic mechanical part has indispensable application embodiment in all industries such as aerospace, nuclear reactors, stationery, children toys and the like. In the prior art, springs are classified into conventional compression springs, wave springs and the like. The traditional compression spring is a spiral spring bearing pressure, a certain gap is formed between the coils of the compression spring, when the compression spring is subjected to external load, the compression spring contracts and deforms, deformation energy is stored, the deformation energy is expressed as that external force is in direct proportion to compression quantity, the rigidity is a constant value, and a force displacement curve is a straight line. However, conventional compression springs do not meet the complex force displacement curve requirements. The traditional wave spring is an elastic element which is provided with a plurality of peaks and valleys on a metal thin circular ring, waves between different ring layers are mutually supported, when an external load is applied, the height between the peaks and the valleys is reduced, so that the deformation energy is stored, and the force displacement curve is a smooth curve, the rigidity change is single, and the traditional wave spring is usually applied to occasions where the load and the deformation are not large, the rigidity of the spring is required to be small, and the axial pre-pressure is required to be applied. However, the conventional wave spring cannot satisfy the requirement of a large load. In order to make up for the defects of the traditional spring in the occasions where large load and rigidity need to be changed, the spring which has large load and deformation, adjustable rigidity change and simple structure needs to be provided so as to adapt to the more complicated spring requirement places.

Disclosure of Invention

In order to overcome the deficiencies in the prior art, the present application provides a wave spring.

The application provides a pair of wave spring, wave spring is formed by bar sheet along the central axis spiral and be a plurality of rings of wavy convolutes, and every ring of wave spring includes a plurality of crests and trough, every crest of circle of wave spring corresponds each other with the trough of adjacent circle, and has the pitch height between the crest of lower floor circle and the trough of adjacent upper circle.

In one possible embodiment, corresponding peaks and valleys of adjacent turns of the wave spring extend toward or away from each other.

In one possible embodiment, the corresponding wave crests and wave troughs on adjacent coils of the wave spring extend in opposite directions.

In one possible embodiment, the pitch height ranges from 0.5mm to 10 mm.

In a possible embodiment, a wave height exists between the wave trough of the lower layer wave and the wave crest of the upper layer wave, and the wave height ranges from 0.5mm to 10 mm.

In one possible embodiment, the strip-shaped sheet has a thickness ranging from 0.2mm to 2 mm.

In one possible embodiment, the wave spring has an inner diameter ranging from 4mm to 30mm and an outer diameter ranging from 5mm to 40 mm.

In one possible embodiment, the free height of the wave spring ranges from 3mm to 100 mm.

In one possible embodiment, the working height of the wave spring ranges from 2mm to 40 mm.

In one possible embodiment, the number of turns of the wave spring ranges from 2 to 40 turns.

Compared with the prior art, the beneficial effects of the application are that:

this application forms through a bar sheet along the central axis spiral winding, the bar sheet is wavy along its length direction for it forms to convolute wave spring's upper and lower two-layer crest and trough correspond to each other, and has the pitch height between the crest of lower floor's ripples and the trough of upper strata ripples. On the basis of the variable rigidity of the traditional wave spring, the working range with constant rigidity as the same as that of the traditional compression spring is increased, and the screw pitch part of the compression spring is compressed through the compression process as the same as that of the traditional compression spring in the stressed compression process; when the wave springs are axially and mutually propped, the stress is increased, and the compression process is the same as that of the conventional wave spring. Therefore, the wave spring provided by the application has the characteristics that the constant stiffness can be realized on the same spring firstly, and then the stiffness is increased, so that the complexity of the stiffness change of the spring is increased, and the wave spring can be applied to more complex spring stiffness requirement scenes such as large load and deformation, adjustable stiffness change and the like.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 shows a force displacement curve diagram of a conventional compression spring;

FIG. 2 illustrates a force displacement curve diagram for a conventional wave spring;

FIG. 3 shows a schematic structural view of a wave spring as described in the present application;

FIG. 4 illustrates a top view of the wave spring of FIG. 3;

FIG. 5 illustrates a side view of the wave spring of FIG. 3;

fig. 6 shows a force displacement curve diagram of the wave spring described in the present application.

Description of the main element symbols:

100-wave spring; 10-strip-shaped sheet material; d-inner diameter; d-outer diameter; h-free height; l-pitch height; b-waveform height.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1, is a force displacement curve of a conventional compression spring. After the spring is stressed, the acting force applied to the spring is linearly related to the displacement value of the compression deformation of the spring. The stiffness of a spring is the ratio of the load increment to the deflection increment, and thus, the stiffness value of a conventional compression spring is constant.

As shown in fig. 2, is a force displacement curve of a conventional wave spring. After the spring is stressed, the displacement value of the compression deformation of the spring is gradually increased, when the spring just begins to be stressed, the displacement value of the compression deformation is larger when the spring increases a certain acting force, and after the spring bears a certain acting force, the displacement value of the compression deformation is gradually reduced when the spring increases the certain acting force, namely, the rigidity value of the traditional wave spring is gradually increased along with the increase of the acting force.

Referring to fig. 3 and 6, the present application provides a wave spring with variable stiffness by replacing a spiral wire with a sheet-like corrugated sheet based on a conventional compression spring structure.

In the stressed compression process, the wave spring firstly undergoes the same compression process as the traditional compression spring to compress the thread pitch part, and at the moment, the stiffness value of the wave spring is constant as the compression spring, and the wave spring is represented as an upward inclined straight line part in a force displacement curve chart shown in fig. 6; when the wave springs are axially abutted against each other, the wave springs are subjected to increased stress and begin to compress the wave parts through the same compression process as the conventional wave springs, and the stiffness values of the wave springs are gradually increased along with the increase of the acting force like the conventional wave springs, and the wave springs are represented as curve parts connected with the straight line parts in the force displacement curve chart shown in fig. 6. Therefore, the wave spring provided by the application can realize the characteristic that the rigidity is variable (constant rigidity is firstly realized, and then the rigidity is increased) on the same spring.

Examples

Referring to fig. 3, an embodiment of the present application provides a wave spring 100. The wave spring 100 can provide two stiffness characteristics, and the complexity of spring change is increased, so that the wave spring can be applied to a scene that the load and the deformation are required to be large and the stiffness change is adjustable.

For example, in a specific sealing scene, a certain pressure is required, and the stress is required to be within a certain range, so that the sealing can be carried out under the certain pressure, and the damage to a matching part caused by the over-stress can be prevented. The damping device can also be used for damping the chassis of the vehicle, when the load is smaller, the spring can be softer, the comfort level of the vehicle is improved, the damping device enters a second elastic deformation area along with the increase of the load, the rigidity of the spring is increased, and the load capacity is enhanced.

The wave spring 100 is formed by spirally winding a strip-shaped sheet 10 in several turns along a central axis. Wherein the strip-shaped sheet 10 is wavy along its length direction. So that the wave spring 100 formed by winding includes several peaks and valleys in each turn. The wave crest in each circle and the wave trough of the adjacent circle correspond to each other, and the pitch height exists between the wave crest of the lower circle and the wave trough of the adjacent upper circle, so that when the stress is started, the constant-stiffness compression can be carried out as the compression spring.

It is understood that in other embodiments, the wave spring 100 may be formed by winding a plurality of strip-shaped sheets 10.

It will be appreciated that corresponding peaks and valleys on adjacent coils of the wave spring 100 extend toward or away from each other.

It will be appreciated that the corresponding peaks and valleys on adjacent coils of the wave spring 100 extend in opposite directions.

Specifically, referring to fig. 3 to 5, in some embodiments of the present application, the thickness of the strip-shaped sheet 10 ranges from 0.2mm to 2mm, and preferably, the thickness of the strip-shaped sheet 10 is 0.5mm, so as to ensure that the strip-shaped sheet 10 has sufficient strength to provide the corresponding stiffness for the wave spring 100.

In other embodiments, the strip 10 has a thickness in the range of 0.2mm to 1 mm.

In still other embodiments, the strip-shaped sheet 10 has a thickness in a range of 0.3mm to 1 mm.

Alternatively, the thickness of the strip-shaped sheet 10 may be selected to be designed to be 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm, 0.8mm, 0.85mm, 0.9mm, 0.95mm, or 1 mm. It is to be understood that the above description is intended to be illustrative only and is not intended to limit the scope of the present application.

In some embodiments of the present application, the strip-shaped sheet 10 is made of spring steel. But not limited thereto, in other embodiments, the strip-shaped sheet 10 may also be made of high-speed steel, stainless steel, copper metal, aluminum alloy chrome vanadium steel, silicon manganese steel, etc.

It is understood that the stiffer the material of the strip-shaped sheet 10, and the thicker the thickness, the stiffer the wave spring 100.

As shown in fig. 5, in some embodiments of the present application, a pitch height L exists between a peak of a lower-layer wave and a valley of an upper-layer wave, and a waveform height B exists between the valley of the lower-layer wave and the peak of the upper-layer wave. The pitch height L is a compression height at which the wave spring 100 performs constant stiffness compression as in a conventional compression spring, and the pitch height B is a compression height at which the wave spring 100 performs stiffness variable compression as in a conventional wave spring.

In some embodiments of the present invention, the pitch height L of the wave spring 100 ranges from 0.5mm to 10mm, and preferably, the pitch height L of the wave spring 100 is 1.5mm, so as to ensure that the wave spring 100 has sufficient constant stiffness and provide sufficient installation space for the wave spring 100. The greater the pitch height L, the longer the wave spring 100 is compressed to a constant stiffness, and the longer the straight portion is shown in the force displacement graph shown in fig. 6.

In some embodiments of the present invention, the wave height B of the wave spring 100 ranges from 0.5mm to 10mm, and preferably, the wave height B of the wave spring 100 is 5.6mm, so as to ensure that the wave spring 100 has sufficient variable stiffness and provide sufficient adjustment space for the wave spring 100. The greater the wave height B, the longer the length of the wave spring 100 that undergoes variable rate compression, and the longer the length of the curved portion that appears to be connected to the straight portion in the force displacement graph shown in fig. 6.

As shown in fig. 4, in some embodiments of the present invention, the inner diameter d of the wave spring 100 ranges from 4mm to 30mm, and preferably, the inner diameter d of the wave spring 100 is 22mm, so as to ensure that the wave spring 100 is not easily deformed radially and provide sufficient strength to the wave spring 100.

In other embodiments, the wave spring 100 has an inner diameter d in the range of 10mm to 30 mm.

In still other embodiments, the wave spring 100 has an inner diameter d ranging from 20mm to 30 mm.

Alternatively, the inner diameter d of the wave spring 100 may be selected to be 20mm, 20.5mm, 21mm, 21.5mm, 22mm, 22.5mm, 23mm, 23.5mm, 24mm, 24.5mm, 25mm, 25.5mm, 26mm, 26.5mm, 27mm, 27.5mm, 28mm, 28.5mm, 29mm, 29.5mm, or 30 mm. It is to be understood that the above description is intended to be illustrative only and is not intended to limit the scope of the present application.

In some embodiments of the present invention, the outer diameter D of the wave spring 100 ranges from 5mm to 40mm, and preferably, the outer diameter D of the wave spring 100 is 26mm, so as to ensure that the wave spring 100 is not easily deformed radially, and provide sufficient strength for the wave spring 100.

In other embodiments, the wave spring 100 has an outer diameter D ranging from 10mm to 40 mm.

In still other embodiments, the wave spring 100 has an outer diameter D ranging from 20mm to 40 mm.

Alternatively, the outer diameter D of the wave spring 100 may be selected to be 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, 31mm, 32mm, 33mm, 34mm, 35mm, 36mm, 37mm, 38mm, 39mm, or 40 mm. It is to be understood that the above description is intended to be illustrative only and is not intended to limit the scope of the present application.

Referring to fig. 5, in some embodiments of the present invention, the free height H of the wave spring 100 ranges from 3mm to 100mm, and preferably, the free height H of the wave spring 100 is 25mm, so as to ensure that the wave spring 100 has a sufficient length to provide a corresponding distance for the compression deformation of the wave spring 100.

In other embodiments, the free height H of the wave spring 100 ranges from 5mm to 50 mm.

In still other embodiments, the free height H of the wave spring 100 ranges from 5mm to 30 mm.

Alternatively, the free height H of the wave spring 100 may be selected to be 5mm, 7.5mm, 10mm, 12.5mm, 15mm, 17.5mm, 20mm, 22.5mm, 25mm, 27.5mm, or 30 mm. It is to be understood that the above description is intended to be illustrative only and is not intended to limit the scope of the present application.

In some embodiments of the present invention, the working height of the wave spring 100 ranges from 2mm to 40mm, and preferably, the working height of the wave spring 100 is 20mm, so as to ensure that the wave spring 100 has sufficient displacement distance and stiffness value, and provide sufficient strength for the wave spring 100.

In other embodiments, the wave spring 100 has a working height in the range of 10mm to 40 mm.

In still other embodiments, the wave spring 100 has a working height in the range of 20mm to 40 mm.

Alternatively, the working height of the wave spring 100 may be selected to be 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, 31mm, 32mm, 33mm, 34mm, 35mm, 36mm, 37mm, 38mm, 39mm, or 40 mm. It is to be understood that the above description is intended to be illustrative only and is not intended to limit the scope of the present application.

In some embodiments of the present application, the number of turns of the wave spring 100 ranges from 2 to 40, and preferably, the number of turns of the wave spring 100 is 6, so as to ensure that the wave spring 100 has sufficient structural strength, and facilitate the forming of the wave spring 100.

In other embodiments, the wave spring 100 has a number of turns in the range of 2 to 30 turns.

In still other embodiments, the wave spring 100 has a number of turns in the range of 2 to 20 turns.

Alternatively, the number of turns of the wave spring 100 may be selected to be 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 or 20 turns. It is to be understood that the above description is intended to be illustrative only and is not intended to limit the scope of the present application.

The number of sine waves contained in each coil of the wave spring is called wave number, in some embodiments of the present application, the wave number of the wave spring 100 ranges from 1 wave to 10 waves, and preferably, the wave number of the wave spring 100 is 4 waves, so as to ensure that the wave spring 100 has sufficient structural strength and facilitate the formation of the wave spring 100.

In other embodiments, the wave spring 100 has a wave number in the range of 2 waves to 9 waves.

In still other embodiments, the wave spring 100 has a wave number in the range of 3 waves to 8 waves.

Alternatively, the wave number of the wave spring 100 may be selected to be designed to be 3 waves, 3.5 waves, 4 waves, 4.5 waves, 5 waves, 5.5 waves, 6 waves, 6.5 waves, 7 waves, 7.5 waves, or 8 waves. It is to be understood that the above description is intended to be illustrative only and is not intended to limit the scope of the present application.

It is understood that in the wave spring 100 described herein, the stiffness value and working distance of the constant stiffness working portion as in the conventional compression spring can be designed according to the shape of the strip-shaped sheet 10, the selection of the material, and the pitch height L; the stiffness curve and the working distance of the variable stiffness portion, which are the same as those of the conventional wave spring, can be designed according to the wave shape (i.e., the wave height B and the wave number), the shape and the material of the strip-shaped sheet 10.

The traditional compression spring and the traditional wave spring are integrated, so that the working range with constant rigidity as the same as that of the traditional compression spring is increased on the basis of the variable rigidity of the traditional wave spring, the rigidity change of the wave spring in the application is complex, the diversity of the rigidity change is increased, and the wave spring can be applied to occasions with more complex spring rigidity requirements.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. The utility model provides a wave spring, its characterized in that, wave spring is formed by strip sheet along the central axis spiral and be the wavy several circles of convoluteing, and every circle of wave spring includes a plurality of crests and trough, the crest of every circle of wave spring corresponds each other with the trough of adjacent circle, and has the pitch height between the crest of lower floor's circle and the trough of adjacent upper strata circle.

2. The wave spring according to claim 1 wherein corresponding peaks and valleys on adjacent coils of said wave spring extend toward or away from each other.

3. The wave spring according to claim 1 wherein corresponding peaks and valleys on adjacent coils of said wave spring extend in opposite directions.

4. The wave spring according to claim 1 wherein said pitch height ranges from 0.5mm to 10 mm.

5. The wave spring according to claim 1, wherein a wave height exists between a trough of the lower layer wave and a peak of the upper layer wave, and the wave height ranges from 0.5mm to 10 mm.

6. The wave spring according to claim 1, wherein the strip-shaped sheet material has a thickness in a range of 0.2mm to 2 mm.

7. The wave spring according to claim 1, wherein an inner diameter of the wave spring ranges from 4mm to 30mm, and an outer diameter of the wave spring ranges from 5mm to 40 mm.

8. The wave spring according to claim 1, wherein the free height of the wave spring ranges from 3mm to 100 mm.

9. The wave spring according to claim 1 having a working height in the range of 2mm to 40 mm.

10. The wave spring according to claim 1, wherein the number of turns of the wave spring ranges from 2 to 40 turns.