Leaf spring assemblies, linear motors and linear compressors

Abstract

The present disclosure relates to the technical field of compressors, and in particular to a leaf spring assembly, a linear motor and a linear compressor. The leaf spring assembly includes a plurality of first fixed clamps and at least one leaf spring, the first fixed clamps are annular in shape, and the plurality of first fixed clamps are stacked, and at least one leaf spring is sandwiched between any two adjacent first fixed clamps; a plurality of vortex grooves are provided on the leaf spring, and the first fixed clamps extend inwardly at a position corresponding to the tail end of the vortex groove to form a first pressure plate, and the first pressure plate covers the tail end of the vortex groove and extends to the outer edge of another vortex groove adjacent to the inner side of the tail end of the vortex groove. When the leaf spring is subjected to axial force, the edge of the first pressure plate intersects with the vortex arm of the leaf spring, which changes the stress distribution of the vortex arm of the leaf spring, avoids stress concentration, and thus improves the reliability of the leaf spring.

Description

Technical Field

[0001] The present disclosure relates to the technical field of compressors, and in particular to a leaf spring assembly, a linear motor and a linear compressor. Background Art

[0002] Leaf spring support technology is one of the key technologies of linear compressors. Compared with traditional cylindrical springs, leaf springs have greater radial stiffness, so that the piston will not produce radial displacement due to vibration during movement, avoiding direct contact between the piston and the cylinder; and the axial stiffness of the leaf spring is much smaller than its radial stiffness, which allows the piston to reciprocate freely in the cylinder.

[0003] There are two main types of leaf springs commonly used at present: straight arm leaf springs and vortex arm leaf springs. Although the straight arm leaf spring has a large radial stiffness, it cannot have a large stroke due to stress deformation limitations and often cannot meet the stroke requirements. The vortex arm leaf spring makes the spring arm into a multi-turn vortex structure, and sets an arc-shaped enlarged hole at the end of the vortex groove where stress concentration is prone to occur, so as to reduce the stress concentration phenomenon of the vortex arm leaf spring. However, it is found in actual use that the stress concentration phenomenon of the vortex arm leaf spring cannot be completely eradicated. After long-term use, the stress concentration point is still prone to breakage. Summary of the invention

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a leaf spring assembly, a linear motor and a linear compressor.

[0005] The present disclosure provides a leaf spring assembly, comprising a plurality of first fixing plates and at least one leaf spring, wherein the first fixing plates are annular in shape and are stacked, with at least one leaf spring sandwiched between any two adjacent first fixing plates; a plurality of vortex grooves are provided on the leaf spring, the first fixing plates extend inwardly at a position corresponding to the tail end of the vortex groove to form a first pressure plate, the first pressure plate covers the tail end of the vortex groove and extends to the outer edge of another vortex groove adjacent to the inner side of the tail end of the vortex groove.

[0006] Optionally, the outer contour of the first pressure plate includes a first vortex line, a first end line and a second end line, and two ends of the first vortex line are connected to the inner edge of the first fixing clamping plate through the first end line and the second end line, respectively.

[0007] Optionally, the projection of the first vortex line on the leaf spring coincides with an outer edge of the vortex groove that is closest to the first vortex line.

[0008] Optionally, the first end line is a straight line, and a projection of the first end line on the leaf spring intersects with a center line of a tail end of the vortex groove corresponding to the first pressure plate.

[0009] Optionally, the second end line is located in the extension direction of the vortex groove corresponding to the first pressure plate, and one end of the second end line is connected to the first vortex line, and the other end is inclined in a direction away from the vortex groove corresponding to the first pressure plate.

[0010] Optionally, a avoidance groove is provided on the first fixing clamping plate, the avoidance groove is recessed from the inner edge of the first fixing clamping plate toward the outer edge, and the avoidance groove is arranged adjacent to the first pressing plate.

[0011] Optionally, the avoidance groove is provided on one side of the first end line of the first pressing plate, and a groove wall on one side of the avoidance groove and the first end line are located in the same plane.

[0012] Optionally, the leaf spring assembly also includes a plurality of second fixing clamps, which are annular in shape and are arranged corresponding to the center of the leaf spring and clamped on both sides of the leaf spring. The outer edge of the second fixing clamp extends outward at a position opposite to the head end of the vortex groove to form a second pressure plate, and the second pressure plate covers the head end of the vortex groove and extends to the inner edge of another vortex line adjacent to the outer side of the head end of the vortex groove.

[0013] Optionally, the outer contour of the second pressure plate includes a first connecting line and a second connecting line, the projection of the first connecting line on the leaf spring intersects with the center line of the head end of the vortex groove corresponding to the first connecting line, and one end of the first connecting line is directly connected to the outer edge of the second fixed clamping plate, and the other end is connected to the outer edge of the second fixed clamping plate through the second connecting line, and the connection point of the first connecting line and the outer edge of the second fixed clamping plate and the connection point of the second connecting line and the outer edge of the second fixed clamping plate are arranged at intervals along the circumference of the second fixed clamping plate.

[0014] The present disclosure also provides a linear motor, comprising a leaf spring assembly as described in any one of the above items.

[0015] In addition, the present disclosure also provides a linear compressor, comprising the above-mentioned linear motor.

[0016] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0017] A leaf spring assembly provided by an embodiment of the present disclosure includes a plurality of first fixed clamps and at least one leaf spring, wherein the first fixed clamps are annular in shape, and the plurality of first fixed clamps are stacked, and at least one leaf spring is sandwiched between any two adjacent first fixed clamps, and the leaf spring is provided with a plurality of vortex grooves, wherein the first fixed clamps extend inwardly at a position corresponding to the tail end of the vortex groove to form a first pressure plate, and the first pressure plate covers the tail end of the vortex groove and extends to the outer edge of another vortex groove adjacent to the inner side of the tail end of the vortex groove. The leaf spring assembly is provided with a first pressure plate on the first fixed clamp, and the first pressure plate covers the tail end of the vortex groove and extends to the outer edge of another vortex groove, and when the leaf spring is subjected to an axial force, the edge of the first pressure plate intersects with the vortex arm of the leaf spring, thereby changing the stress distribution of the vortex arm of the leaf spring, avoiding stress concentration, and thus improving the reliability of the leaf spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 It is a schematic diagram of the structure of the leaf spring assembly according to some embodiments of the present disclosure;

[0021] Figure 2 1 is a side view of a leaf spring assembly according to some embodiments of the present disclosure.

[0022] Among them, 1. first fixed clamp; 2. leaf spring; 3. first pressure plate; 4. second fixed clamp; 5. second pressure plate; 101. avoidance groove; 102. inner edge; 201. vortex groove; 201a. vortex groove; 201b. vortex groove; 201c. vortex groove; 201d. vortex groove; 301. first vortex line; 302. first end line; 303. second end line; 401. outer edge; 501. first connecting line; 502. second vortex line; 503; second connecting line. DETAILED DESCRIPTION

[0023] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0025] like Figure 1 and Figure 2 As shown, an embodiment of the present disclosure provides a leaf spring assembly, comprising a plurality of first fixed splints 1 and at least one leaf spring 2, the first fixed splints 1 are annular in shape, and the plurality of first fixed splints 1 are stacked, one or more leaf springs 2 are sandwiched between any two adjacent first fixed splints 1, a plurality of vortex grooves 201 are provided on the leaf spring 2, the first fixed splint 1 extends inwardly at a position corresponding to the tail end of the vortex groove 201 to form a first pressure plate 3, the first pressure plate 3 covers the tail end of the vortex groove 201 and extends to the outer edge of another vortex groove 201 adjacent to the inner side of the tail end of the vortex groove 201.

[0026] Specific, combined Figure 1 As shown, in some embodiments of the present disclosure, the leaf spring 2 is provided with a total of four vortex grooves, namely vortex groove 201a to vortex groove 201d, and the four vortex grooves 201a to 201d on the leaf spring 2 extend from the center to the edge of the leaf spring 2, and the tail end of each vortex groove 201 is arranged close to the edge of the leaf spring 2. Therefore, when the fixed clamp 1 is fixedly installed with the leaf spring 2, the fixed clamp 1 easily covers the tail end of the vortex groove 201a to 201d, which will reduce the effect of reducing stress concentration from 201a to the tail end of the vortex groove 201d. In some embodiments of the present disclosure, the inner edge 102 of the fixed clamp 1 is extended inwardly to the outer edge of another adjacent vortex groove 201. For example, one of the first pressure plates 3 is pressed on the tail end of the vortex groove 201a, and the first pressure plate 3 extends inwardly to the outer edge of the vortex groove 201b, wherein the vortex groove 201b is arranged adjacent to the vortex groove 201a. In this way, when the leaf spring is subjected to axial force, since the edge of the first clamp 3 is located at the edge of the vortex groove 201b, it not only has the effect of strengthening the strength, but also does not generate additional stress concentration points for the leaf spring.

[0027] Further, in some embodiments of the present disclosure, the outer contour of the first pressure plate 3 includes a first vortex line 301, a first end line 302, and a second end line 303, and the two ends of the first vortex line 301 are respectively connected to the inner edge 102 of the first fixed clamping plate 1 through the first end line 302 and the second end line 303. Specifically, the first pressure plate 3 can be integrally formed with the first fixed clamping plate 1, or can be connected to the first fixed clamping plate 1 by welding or bonding. When the leaf spring is subjected to axial stress, the stress at the tail end of the leaf spring 2 is dispersed to the first end line 302, thereby reducing the stress concentration.

[0028] Further, in some embodiments of the present disclosure, the projection of the first vortex line 301 on the leaf spring 2 coincides with the outer edge of the vortex groove 201 that is closest to the first vortex line 201. Figure 1 As described above, in some embodiments of the present disclosure, the projection of the first vortex line 301 of one of the first pressure plates 3 on the leaf spring 2 coincides with the outer edge of 201b, further reducing the stress effect of the fixing clamp 1 on the leaf spring 2.

[0029] Further, in some embodiments of the present disclosure, the first end line 302 is a straight line, and the projection of the first end line 302 on the leaf spring 2 intersects with the center line of the tail end of the vortex groove 201 corresponding to the first pressure plate 3. Figure 1 As shown, the projection of the first end line 302 of one of the first pressing plates 3 on the leaf spring intersects with the center line of the tail end of the vortex groove 201a. Therefore, the vortex groove 201 corresponding to the first pressing plate 3 mentioned here is the vortex groove 201a pressed under the first pressing plate 3.

[0030] Further, in some embodiments of the present disclosure, the angle between the projection of the first end line 302 on the leaf spring 2 and the center line of the tail end of the vortex groove 201 corresponding to the first pressure plate 3 is α, 30°≤α≤150°. Preferably, α is 90 degrees, that is, the projection of the first end line 302 on the leaf spring 2 is perpendicular to the center line of the tail end of the vortex groove 201 corresponding to the first pressure plate 3. Figure 1 That is, the projection of the first end line 302 on the leaf spring 2 is perpendicular to the center line of the tail end of the swirl groove 201a.

[0031] In addition, in some other embodiments of the present disclosure, the first end line may also be an arc line or a curve in other forms. When the first end line is an arc line or a curve in other forms, the angle α is defined as the angle between the tangent line of the projection of the first end line on the leaf spring at the intersection with the center line of the vortex groove and the center line of the vortex groove.

[0032] Further, in some embodiments of the present disclosure, the second end line 303 is located in the extension direction of the vortex groove 201 corresponding to the first pressing plate 3, and one end of the second end line 303 is connected to the first vortex line 301, and the other end is inclined in a direction away from the vortex groove 201 corresponding to the first pressing plate 3. The second end line 303 is arranged in the extension direction of the vortex groove 201 corresponding to the first pressing plate 3 to ensure that the tail end of the vortex groove 201 can be completely blocked by the first pressing plate 3.

[0033] Further, in some embodiments of the present disclosure, the first fixed clamping plate 1 is provided with an avoidance groove 101, which is formed by being recessed from the inner edge 102 of the first fixed clamping plate 1 toward the outer edge, and the avoidance groove 101 is arranged adjacent to the first pressing plate 3. The avoidance groove 101 is arranged on the first fixed clamping plate 1 to prevent the vortex groove 201 from being blocked by other places except the first pressing plate 3, thereby affecting the axial elastic force of the leaf spring 2.

[0034] Furthermore, in some embodiments of the present disclosure, the avoidance groove 101 is provided on one side of the first end line 302 of the first pressing plate 3, and the groove wall on one side of the avoidance groove 101 is located in the same plane as the first end line 302. The connection between the avoidance groove 101 and the first pressing plate 3 is smooth and has no sharp corners, which further reduces the occurrence of stress concentration.

[0035] Further, in some embodiments of the present disclosure, the leaf spring assembly also includes a plurality of second fixing splints 4, the number of the second fixing splints 4 is equal to the number of the first fixing splints 1, the second fixing splints 4 are annular in shape, and the second fixing splints 4 are arranged corresponding to the center of the leaf spring 2, and two second fixing splints 4 are clamped on both sides of a leaf spring 2, and the outer edge 401 of the second fixing splint 4 extends outward at a position opposite to the head end of the vortex groove 201 to form a second pressure plate 5, and the second pressure plate 5 covers the head end of the vortex groove 201 and extends to the inner edge of another vortex groove adjacent to the outside of the head end of the vortex groove 201. The second fixing splint 4 covers the head end 201 of the vortex groove in the center of the leaf spring 2, which can not only fix the plurality of leaf springs 2 in the center of the leaf spring 2, but also avoid the influence of the setting of the second fixing splint 4 on the performance of the leaf spring 2. Specifically, in combination with Figure 1 As shown, the leaf spring 2 is provided with four vortex grooves, namely, vortex groove 201a to vortex groove 201d, and the outer edge 401 of the second fixed clamping plate 4 extends outward at positions corresponding to the vortex grooves 201a to 201d to form four second pressing plates 5, wherein each second pressing plate 5 covers the head end of a vortex groove 201 and extends to the inner edge of another adjacent vortex groove 201. For example, one of the second pressing plates 5 covers the head end of the vortex groove 201d and extends to the inner edge of the vortex groove 201c, wherein the vortex groove 201c is arranged adjacent to the vortex groove 201d.

[0036] Furthermore, in some embodiments of the present disclosure, the outer contour of the second pressure plate 5 includes a second vortex line 502, a first connecting line 501 and a second connecting line 503, and the two ends of the second vortex line 502 are connected to the outer edge 401 of the second fixing clamp plate 4 through the first connecting line 501 and the second connecting line 503 respectively; and the projection of the second vortex line 502 on the leaf spring 2 coincides with the inner edge of the vortex groove 201 closest to the second vortex line 502, and the projection of the first connecting line 501 on the leaf spring 2 intersects with the center line of the head end of the vortex groove 201 corresponding to the first connecting line 501. Specifically, in combination with Figure 1 As shown, taking one of the second pressing plates 5 as an example, the projection of the second vortex line 502 of the second pressing plate 5 on the leaf spring 2 coincides with the inner edge of the vortex groove 201c, and the vortex groove 201 closest to the second vortex line 502 mentioned here is the vortex groove 201c. The projection of the first connecting line 501 on the leaf spring 2 intersects with the center line of the head end of the vortex groove 201d, and the vortex groove 201 corresponding to the first connecting line 501 mentioned here is the vortex groove 201d located below the first pressing plate 5. The above-mentioned structure of the second pressing plate 5 and the leaf spring 2 can ensure that the second pressing plate 5 presses the entire vortex arm 201 along the width direction, avoiding the second pressing plate 5 from causing additional stress to the leaf spring 2. When subjected to axial stress, the stress at the head end of the vortex groove 201 on the leaf spring 2 is dispersed to the first vortex line 501, thereby reducing the stress concentration.

[0037] Furthermore, the angle between the projection of the first connecting line 501 on the leaf spring 2 and the center line of the head end of the vortex groove 201 corresponding to the first connecting line 501 is β, 30°≤β≤150°. Preferably, β is 90 degrees, that is, the projection of the first connecting line 501 on the leaf spring 2 is perpendicular to the center line of the tail end of the vortex groove 201 corresponding to the second pressure plate 5. Figure 1 That is, the projection of the first connecting line 501 on the leaf spring 2 is perpendicular to the center line of the tail end of the swirl groove 201d.

[0038] In addition, some embodiments of the present disclosure also provide a linear motor, comprising any of the above-mentioned leaf spring assemblies.

[0039] On the other hand, some embodiments of the present disclosure further provide a linear compressor comprising the above-mentioned linear motor.

[0040] To summarize, the leaf spring assembly, linear motor and linear compressor provided by the embodiments of the present invention improve the strength of the connection by setting a first fixing clamp and a second fixing clamp to fix multiple leaf springs together at the edge and center of the leaf spring respectively, and at the same time, a first pressure plate is set on the first fixing clamp to press on the tail end of the vortex groove, and a second pressure plate is set on the second fixing clamp to press on the vortex groove, and the first pressure plate and the second pressure plate both cover the vortex arm in the width direction, thereby avoiding additional stress on the leaf spring.

[0041] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0042] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A leaf spring assembly, characterized in that: The invention comprises a plurality of first fixing clamps (1) and at least one leaf spring (2), wherein the first fixing clamps (1) are annular in shape and the plurality of first fixing clamps (1) are stacked, and at least one leaf spring (2) is sandwiched between any two adjacent first fixing clamps (1); the leaf spring (2) is provided with a plurality of vortex grooves (201), the first fixing clamps (1) extend inwardly at a position corresponding to the tail end of the vortex groove (201) to form a first pressing plate (3), the first pressing plate (3) covers the tail end of the vortex groove (201) and extends to another vortex groove (201) adjacent to the inner side of the tail end of the vortex groove (201). 201); the first pressure plate and the first fixing clamp are integrally formed, or the first pressure plate and the first fixing clamp are welded or bonded; the outer contour of the first pressure plate (3) includes a first vortex line (301), a first end line (302) and a second end line (303), and the two ends of the first vortex line (301) are respectively connected to the inner edge (102) of the first fixing clamp via the first end line (302) and the second end line (303); the projection of the first vortex line (301) on the leaf spring (2) coincides with the outer edge of the vortex groove (201) closest to the first vortex line (301).

2. The leaf spring assembly according to claim 1, characterized in that The first end line (302) is a straight line, and a projection of the first end line (302) on the leaf spring (2) intersects with a center line of a tail end of the vortex groove (201) corresponding to the first pressure plate (3).

3. The leaf spring assembly according to claim 2, characterized in that The second end line (303) is located in the extension direction of the vortex groove (201) corresponding to the first pressure plate (3), and one end of the second end line (303) is connected to the first vortex line (301), and the other end is inclined in a direction away from the vortex groove (201) corresponding to the first pressure plate (3).

4. The leaf spring assembly according to claim 1, characterized in that The first fixed clamping plate (1) is provided with an escape groove (101), the escape groove (101) is formed by being recessed from the inner edge (102) of the first fixed clamping plate towards the outer edge, and the escape groove (101) is arranged adjacent to the first pressing plate (3).

5. The leaf spring assembly according to claim 4, characterized in that The avoidance groove (101) is arranged on one side of the first end line (302) of the first pressing plate (3), and a groove wall on one side of the avoidance groove (101) and the first end line (302) are located in the same plane.

6. The leaf spring assembly according to any one of claims 1 to 5, characterized in that: The leaf spring assembly also includes a plurality of second fixing clamps (4), the second fixing clamps (4) are annular in shape, and the second fixing clamps (4) are arranged corresponding to the center of the leaf spring (2) and clamped on both sides of the leaf spring (2), the outer edge (401) of the second fixing clamps extends outward at a position opposite to the head end of the vortex groove (201) to form a second pressure plate (5), and the second pressure plate (5) covers the head end of the vortex groove (201) and extends to the inner edge of another vortex groove adjacent to the outer side of the head end of the vortex groove.

7. The leaf spring assembly according to claim 6, characterized in that The outer contour of the second pressure plate (5) includes a second vortex line (502), a first connecting line (501) and a second connecting line (503); the two ends of the second vortex line (502) are connected to the outer edge (401) of the second fixing clamp (4) through the first connecting line (501) and the second connecting line (503), respectively; and the projection of the second vortex line (502) on the leaf spring (2) coincides with the inner edge of the vortex groove (201) closest to the second vortex line (502); the projection of the first connecting line (501) on the leaf spring (2) intersects with the center line of the head end of the vortex groove (201) corresponding to the first connecting line (501).

8. A linear motor, characterized in that: Comprising a leaf spring assembly as claimed in any one of claims 1 to 6.

9. A linear compressor, characterized in that: Comprising the linear motor as claimed in claim 8.

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