CN114151483A

CN114151483A - Hollowed-out disc spring

Info

Publication number: CN114151483A
Application number: CN202111422889.9A
Authority: CN
Inventors: 季乐; 严凯; 占辰; 刘远航; 赵昶
Original assignee: Jiangsu Sanzhong Elastic Technology Co ltd
Current assignee: Jiangsu Sanzhong Elastic Technology Co ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-03-08

Abstract

The invention provides a hollow disc spring, which comprises: the disc spring body is in a conical ring shape; the disc spring comprises a plurality of hollow structures, wherein the hollow structures are arranged on a ring body of the disc spring body at equal intervals, and the total area of the hollow structures is 1/3-3/4 of the area of the disc spring body. The invention can meet the requirements of specific application occasions needing to reduce the rigidity of the disc spring body and realize larger stroke at the same time, has simple structure and convenient use, and has good use and popularization values.

Description

Hollowed-out disc spring

Technical Field

The invention relates to the field of disc springs, in particular to a hollow disc spring.

Background

The disk spring is a special spring which is punched by metal plates or strips, is conical in the axial direction and bears load, and has the characteristics of compact axial size, larger radial size and higher rigidity. In order to solve the problem that the stiffness of a conventional disc spring exceeds the required value in some specific situations, slotted disc springs are available on the market, and fig. 1A shows a common slotted disc spring 20, which comprises a disc spring body 21 and a plurality of slots 22 formed in the inner circumference. Although the slotted disc spring 20 can effectively reduce the stiffness of a common disc spring, the inner circumference of the slotted disc spring 20 is a broken structure, so that the slotted disc spring cannot be folded along the inner circumference, and the maximum folding number of the slotted disc spring 20 is 2 (as shown in fig. 1B), which cannot meet the requirement of a large stroke. Therefore, aiming at specific application occasions, the disk spring which has the similar rigidity with the slotted disk spring and can carry out multi-piece involution to meet the requirement of larger stroke is provided, and the technical problem to be solved in the field is solved.

Disclosure of Invention

The invention aims to overcome the defect that after the rigidity of a disc spring is reduced by adopting a slotted structure, the combination of a plurality of disc springs cannot be realized to meet the requirement of a larger stroke, and provides a hollow disc spring.

In order to achieve the above objects and other objects, the present invention includes the following technical solutions: the invention provides a hollow disc spring, which is characterized by comprising the following components: the disc spring body is in a conical ring shape; the disc spring comprises a plurality of hollow structures, wherein the hollow structures are arranged on a ring body of the disc spring body at equal intervals, and the total area of the hollow structures is 1/3-3/4 of the area of the disc spring body.

In one embodiment, the disc spring body has an inner circumference diameter of 10 to 50mm, an outer circumference diameter of 20 to 100mm, a thickness of 0.5 to 3mm, and a free height of 1.15 to 6.2 mm.

In one embodiment, the hollow structures are T-shaped, and two adjacent hollow structures face opposite directions.

In an embodiment, the hollow structure includes a first hollow and a second hollow, the central points of the first and second hollows are not concentric, the central points of all the first hollows are concentric and close to one side of the inner circumference of the disc spring body, and the central points of all the second hollows are concentric and close to one side of the outer circumference of the disc spring body.

In an embodiment, the number of the first openings is different from that of the second openings.

In an embodiment, the number of the first openings is the same as that of the second openings.

In an embodiment, the first hollowing and the second hollowing are arranged in a staggered manner or coaxially arranged at a central point.

In one embodiment, the first hollow and the second hollow are the same shape with different sizes.

In one embodiment, the first and second openings have completely different shapes.

The design of the hollowed-out structure ensures that the rigidity of the disc spring body is similar to that of the slotted disc spring, meanwhile, the hollowed-out structure does not damage the continuity of the inner circumference and the outer circumference of the disc spring body, and compared with the slotted disc spring, the combined combination of more than 2 hollowed-out disc springs can be completed, so that the deformation stroke larger than that of the slotted disc spring under the combined combination is obtained. The invention has simple structure, convenient use and good use and popularization value.

Drawings

FIG. 1A is a schematic representation of a prior art slotted disc spring.

FIG. 1B is a schematic diagram of a slotted disc spring in a closed combination according to the prior art.

FIG. 2 is an axial cross-sectional view of a single disc spring and various combinations thereof.

Fig. 3A is a schematic structural diagram of embodiment 1.

Fig. 3B is a schematic structural diagram of embodiment 2.

Fig. 3C is a schematic structural diagram of embodiment 3.

Fig. 4A is a front view showing embodiment 1.

Fig. 4B is a front view of the embodiment 1 in the involutive combination mode.

FIG. 5 is a schematic structural view of example 4.

FIG. 6 is a schematic structural diagram of example 5.

Detailed Description

Please refer to fig. 2 to 6. The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.

As shown in fig. 2, the disc springs 10 adopt different combination modes, which can change the spring characteristics in a large range, and the common combination mode can adopt involution, superposition and the like, and a group of single disc springs 10 are superposed in the same direction and used to form a superposed combined disc spring; the group of single disc springs are alternately folded according to different directions, and then the combined disc springs are folded. As shown in fig. 2, (a) is an axial sectional view of a single disc spring 10, (b) is an axial sectional view of three disc springs 10 in a stacked state, and (c) is an axial sectional view of three disc springs 10 in a folded state. In the combined mode of superposition, the deformation of the disc spring group is basically the same as that of the single disc spring, and the load under the given deformation is n times of that of the single disc spring (n is the number of the single disc springs in the disc spring group), so when the installation space is limited and the requirement of achieving higher bearing capacity is met, the superposed combined disc spring is usually adopted. Under the involution combination mode, the deformation of the disc spring group is the sum of the deformation of the single disc springs in the disc spring group, and the load is the same as that of the single disc springs, so when the single disc springs cannot meet the stroke requirement, the involution combination disc springs are usually adopted. In addition, when the requirements on the load and the total deformation of the disc springs are high, a combination mode of combining overlapping and involution can be adopted, for example, (d) in fig. 2 is a disc spring group formed by overlapping 6 disc springs 10 in pairs and then involuting the 6 disc springs.

As shown in FIG. 3, in order to obtain a stiffness similar to that of the slotted disc spring 20 and realize the involution combination manner as shown in FIGS. 2(c) and (d), the invention provides a hollowed-out disc spring 30. The hollowed disc spring 30 comprises a disc spring body 31 and hollowed structures 32, the disc spring body 31 is in a conical ring shape, and the ring body of the disc spring body 31 is provided with a plurality of hollowed structures 32 at equal intervals. Although the shape of the hollow 32 is shown as an isosceles trapezoid, this is not required, and the shape of the hollow 32 can be circular, oval, and other polygons. The total area of all the hollow structures 32 is 1/3-3/4 (fig. 3A, 3B and 3C show that the total area of the hollow structures 32 is 3/5, 1/3 and 3/4 of the area of the disc spring body 31, respectively), at this time, the stiffness of the hollow disc spring 30 may be 112-501N/mm, such as 112N/mm, 201N/mm, 303N/mm, 501N/mm, and the like, if the total area of all the hollow structures 32 is smaller than 1/3 of the area of the disc spring body 31, the stiffness reduction degree of the disc spring 30 is not obvious, and the disc spring cannot be applied in place of a slotted disc spring, if the total area of all the hollow structures 32 is larger than 3/4 of the area of the disc spring body 31, the manufacturability of the hollow disc spring 30 is poor, it is difficult to put it into production. The hollow structure 32 is designed to significantly reduce the rigidity of the disc spring body 31.

As shown in FIG. 4, the inner circumference D of the disc spring body 31 may be 10 to 50mm, for example, 25.4mm, the outer circumference D may be 20 to 100mm, for example, 50mm, the thickness t may be 0.5 to 3mm, for example, 1.25mm, and the free height h may be 1.15 to 6.2mm, for example, 2.85 mm. The stroke of the single hollowed disc spring 30 is within the range of the free height h. The hollow structure 32 does not destroy the continuity of the inner circumference and the outer circumference of the disc spring body 31, and compared with the slotted disc spring 20, the combination of more than 2 hollow disc springs 30 can be completed. As shown in fig. 4B, the combined disc spring assembly of 10 hollow disc springs 30 has a free height H10 times the free height H.

As shown in fig. 5, in an embodiment in which the hollow structures 32 are closely arranged, in this embodiment, the hollow structures 32 are "T" shaped, and include horizontal ends 321 and vertical ends 322, two adjacent hollow structures 32 face opposite directions, a horizontal end 321 of one hollow structure 32 is close to the outer circumference of the disc spring body 31, and a vertical end 322 of two adjacent hollow structures 32 is close to the outer circumference of the disc spring body 31. The stiffness of the hollowed disc spring 30 may be 201N/mm.

As shown in fig. 6, in an embodiment of the two-turn arrangement of the hollow structures 32, in this embodiment, the hollow structures 32 include first hollow 33 and second hollow 34, central points of the first hollow 33 and the second hollow 34 are not in a same circle, central points of all the first hollow 33 are in a same circle and are close to one side of the inner circumference of the disc spring body 31, and central points of all the second hollow 34 are in a same circle and are close to one side of the outer circumference of the disc spring body 31. The number of the first and

second openings

33, 34 is shown as the same number, but this is not essential, and the number of the first and

second openings

33, 34 may not be equal. The number of the first hollow 33 and the second hollow 34 is the same, and the arrangement of the first hollow 33 and the second hollow 34 is shown as a staggered arrangement, but this is not necessary, and a central point may be arranged coaxially. The shapes of the first hollow 33 and the second hollow 34 are shown as isosceles trapezoids with different sizes, but this is not necessary, and the first hollow 33 and the second hollow 34 may also be different shapes, for example, the first hollow 33 is circular and the second hollow 34 is isosceles trapezoid, or the first hollow 33 is triangular and the second hollow 34 is circular, etc.

< model >

Examples 1 to 5 and comparative examples 1 to 2 were used as models for the verification. Fig. 3A shows example 1, fig. 3B shows example 2, fig. 3C shows example 3, fig. 5 shows example 4, fig. 6 shows example 5, comparative example 1 is a normal disc spring, fig. 1A shows comparative example 2 (slotted disc spring 20), and the specific structural parameters are shown in table 1.

< evaluation >

The present invention has carried out the performance evaluation of the above examples and comparative examples, and the evaluation results are shown in Table 1. Specific evaluation included testing the stiffness of the examples and comparative examples.

TABLE 1 Performance parameters and Performance test Table for examples and comparative examples

Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value. The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A hollowed-out disc spring, comprising:

the disc spring body is in a conical ring shape;

the disc spring comprises a plurality of hollow structures, wherein the hollow structures are arranged on a ring body of the disc spring body at equal intervals, and the total area of the hollow structures is 1/3-3/4 of the area of the disc spring body.

2. The hollowed disc spring according to claim 1, wherein the disc spring body has an inner circumference diameter of 10 to 50mm, an outer circumference diameter of 20 to 100mm, a thickness of 0.5 to 3mm, and a free height of 1.15 to 6.2 mm.

3. The hollowed disc spring according to claim 1, wherein the hollowed structures are T-shaped, and the directions of two adjacent hollowed structures are opposite.

4. The disc spring of claim 1, wherein the hollow structure comprises a first hollow and a second hollow, the central points of the first and second hollows are not concentric, all the central points of the first hollow are concentric and close to one side of the inner circumference of the disc spring body, and all the central points of the second hollow are concentric and close to one side of the outer circumference of the disc spring body.

5. The disc spring of claim 4, wherein the first and second openings are different in number.

6. The disc spring of claim 4, wherein the first and second openings are the same in number.

7. The disc spring of claim 6, wherein the first and second openings are arranged in a staggered manner or coaxially at a central point.

8. The disc spring of claim 4 wherein the first and second openings are the same shape of different size.

9. The disc spring of claim 4 wherein the first and second cutouts are of completely different shapes.