An assembly structure for a scroll compressor and the scroll compressor itself.

Abstract

This utility model relates to the field of scroll compressor technology, and more particularly to an assembly structure and a scroll compressor. The assembly structure includes a crankshaft; a moving scroll plate with a shaft hole at its bottom, into which the end of the crankshaft is inserted, and a friction coating to reduce friction is provided between the crankshaft and the shaft hole; a frame through which the crankshaft passes, and the friction coating is provided at the contact points between the crankshaft and the frame; and a lower support body through which the crankshaft passes, and a thrust block is mounted on the crankshaft, with the friction coating also provided at the contact points between the crankshaft, the thrust block, and the lower support body. This assembly structure and the scroll compressor solve the problem of high bearing costs in existing scroll compressors.

Description

Technical Field

[0001] This application relates to the field of scroll compressor technology, and in particular to an assembly structure for a scroll compressor and a scroll compressor. Background Technology

[0002] Scroll compressors are widely used in small residential and commercial central air conditioning systems due to their high efficiency and low noise. With the gradual development of the compressor industry, competition in the scroll compressor market is becoming increasingly fierce. To enhance the competitiveness of scroll compressor products, in addition to continuing to improve their performance and reliability, reducing product costs can also strengthen a competitive advantage.

[0003] Existing scroll compressors typically have four bearings. To ensure product reliability, scroll compressors generally use imported bearings. However, imported bearings are relatively expensive, resulting in bearing costs accounting for a large proportion of the total cost of the compressor. Utility Model Content

[0004] In view of this, the purpose of this application is to provide an assembly structure for a scroll compressor and a scroll compressor, so as to solve the problem of high bearing cost in existing scroll compressors.

[0005] According to a first aspect of the present invention, an assembly structure for a scroll compressor is provided, wherein the assembly structure includes: a crankshaft; a moving scroll disk, the bottom of which is provided with a shaft hole, the end of which is inserted into the shaft hole, and a friction coating for reducing friction is provided between the crankshaft and the shaft hole; a frame through which the crankshaft passes, and the friction coating is provided at the contact position between the crankshaft and the frame; and a lower support body through which the crankshaft passes, a thrust block is mounted on the crankshaft, and the friction coating is provided at the contact positions between the crankshaft and the thrust block and the lower support body.

[0006] Preferably, the crankshaft includes: an upper shaft portion, partially inserted into the shaft hole of the moving scroll plate, wherein the portion of the upper shaft portion inserted into the shaft hole is provided with the friction coating, and the friction coating is provided on the circumferential side surface of the upper shaft portion; a middle shaft portion, disposed below the upper shaft portion, passing through the frame, wherein the portion of the middle shaft portion in contact with the frame is provided with the friction coating, and the friction coating is provided on the circumferential side surface of the middle shaft portion; and a lower shaft portion, disposed below the middle shaft portion, passing through the lower support body, wherein a thrust block is mounted on the lower shaft portion, the bottom of the thrust block contacts the top of the lower support body, and the friction coating is provided at the positions of the lower shaft portion and the thrust block in contact with the lower support body.

[0007] Preferably, the bottom of the moving scroll disk is provided with an annular protrusion that protrudes axially, and the shaft hole is formed inside the annular protrusion.

[0008] Preferably, the friction coating is provided on the inner wall of the annular protrusion in the circumferential direction, the side of the crankshaft in the circumferential direction contacts the inner wall of the annular protrusion in the circumferential direction, and a gap is provided between the top end of the crankshaft and the moving scroll disk.

[0009] Preferably, the bottom of the frame is provided with an axially extending annular portion, the crankshaft passes through the annular portion, and the outer periphery of the crankshaft contacts the inner wall of the annular portion.

[0010] Preferably, the inner wall of the annular portion is provided with the friction coating.

[0011] Preferably, the lower support includes: a disc-shaped portion, the outer periphery of which is connected to the inner wall of the casing of the scroll compressor; and an annular portion disposed in the middle of the disc-shaped portion, the annular portion protruding axially from the disc-shaped portion, an axial through hole formed in the center of the annular portion, the axial through hole penetrating the disc-shaped portion, the crankshaft passing through the axial through hole, and the thrust block disposed above the annular portion.

[0012] Preferably, the outer periphery of the crankshaft is in contact with the wall surface of the axial through hole, the bottom surface of the thrust block is in contact with the top surface of the annular portion, and the friction coating is provided on the wall surface of the axial through hole and the top surface of the annular portion.

[0013] Effectively, the thrust block is formed as a ring, and the thrust block is interference-fitted with the crankshaft.

[0014] According to a second aspect of the present invention, a scroll compressor is provided, wherein the scroll compressor includes the scroll compressor assembly structure described above.

[0015] The scroll compressor assembly structure and the scroll compressor of this utility model embodiment have a shaft hole at the bottom of the moving scroll disk. The end of the crankshaft is inserted into the shaft hole, and a friction coating that reduces friction is provided between the crankshaft and the shaft hole. The crankshaft passes through the frame, and a friction coating is provided at the contact position between the crankshaft and the frame. In addition, the crankshaft passes through the lower support body, and a friction coating is provided at the contact position between the crankshaft and the lower support body. In this way, by using a friction-reducing coating to replace the original bearing structure, the production cost of the scroll compressor is reduced, thereby effectively solving the problem of high bearing cost in existing scroll compressors.

[0016] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is an assembly structure of the scroll compressor according to the present invention and a schematic diagram of the scroll compressor.

[0019] Figure 2 This is a schematic diagram of the crankshaft of the scroll compressor assembly structure according to this utility model.

[0020] Reference numerals: 1-crankshaft; 11-upper shaft; 12-middle shaft; 13-lower shaft; 2-moving scroll disk; 20-scroll blade; 21-annular protrusion; 3-frame; 31-annular part; 4-lower support; 41-disc-shaped part; 42-annular part; 5-thrust block; 6-housing; 7-motor; 8-friction coating. Detailed Implementation

[0021] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0022] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0023] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0024] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0025] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0026] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0027] The terminology used herein is for the purpose of describing various examples only and is not intended to limit the examples. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0028] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0029] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0030] like Figure 1 and Figure 2 As shown, according to a first aspect of the present invention, an assembly structure for a scroll compressor is provided, the assembly structure of which includes a crankshaft 1, a moving scroll disk 2, a frame 3, and a lower support body 4.

[0031] In the following description, reference will be made to Figure 1 and Figure 2 The specific structure of the aforementioned components and their connection relationships are described in detail in the assembly structure of the scroll compressor.

[0032] like Figure 1 and Figure 2 As shown, in this embodiment, the bottom of the scroll plate 2 can be provided with a shaft hole for assembly with the crankshaft 1. The top end of the crankshaft 1 can be inserted into the shaft hole, and a friction coating 8 to reduce friction is provided between the crankshaft 1 and the shaft hole, replacing the original upper bearing structure. The middle part of the crankshaft 1 can pass through the frame 3, and a friction coating 8 can be provided at the contact position between the crankshaft 1 and the frame 3, replacing the original middle bearing structure. The lower part of the crankshaft 1 can pass through the lower support body 4, and a thrust block 5 is installed on the crankshaft 1. A friction coating 8 can be provided at the contact position between the crankshaft 1, the thrust block 5, and the lower support body 4, replacing the original lower bearing structure. In this way, the assembly structure of the scroll compressor effectively reduces production costs by replacing the more expensive bearing structure with a friction coating 8.

[0033] Preferably, in this embodiment, the friction coating 8 can be a polymer coating capable of lubrication and friction reduction, which can be fixed to the surface of the crankshaft 1 or other components by spraying. Specifically, the friction coating 8 can be of the TriboShield type. TM TS 421 However, it is not limited to this. As long as the friction coating 8 can achieve the function of reducing friction, the friction coating 8 can also be other polymer coatings.

[0034] Preferred, such as Figure 1 and Figure 2 As shown, in this embodiment, the crankshaft 1 may include an upper shaft portion 11, a middle shaft portion 12, and a lower shaft portion 13. The upper shaft portion 11, middle shaft portion 12, and lower shaft portion 13 are arranged sequentially from top to bottom. The upper shaft portion 11 may be partially inserted into the shaft hole of the moving scroll plate 2, and a friction coating 8 is provided on the portion of the upper shaft portion 11 inserted into the shaft hole. Specifically, the friction coating 8 may be provided on the circumferential side of the upper shaft portion 11 to reduce friction between the upper shaft portion 11 and the moving scroll plate 2. The middle shaft portion 12 is located below the upper shaft portion 11, and its upper part passes through the frame 3. The motor 7 is mounted in the middle of the middle shaft portion 12. A friction coating 8 may be provided on the portion of the middle shaft portion 12 that contacts the frame 3 to reduce friction between the middle shaft portion 12 and the frame 3. The friction coating 8 may be provided on the circumferential side of the middle shaft portion 12. The lower shaft portion 13 is disposed below the central shaft portion 12, and the lower shaft portion 13 can pass through the lower support body 4. A thrust block 5 can be installed on the lower shaft portion 13, and the bottom of the thrust block 5 can contact the top of the lower support body 4, so that the lower support body 4 can provide axial support for the thrust block 5 and the crankshaft 1. A friction coating 8 can be provided on the portions of the lower shaft portion 13 and the thrust block 5 that contact the lower support body 4 to reduce friction between the lower shaft portion 13 and the thrust block 5 and the lower support body 4.

[0035] Furthermore, preferably, such as Figure 1 and Figure 2 As shown, in this embodiment, the top of the moving scroll disk 2 may be provided with scroll blades 20, and the bottom of the moving scroll disk 2 may be provided with an axially protruding annular protrusion 21. The scroll blades 20 and the annular protrusion 21 are respectively provided on opposite sides of the moving scroll disk 2. The shaft hole is formed inside the annular protrusion 21, that is, the annular protrusion 21 surrounds and forms the shaft hole. The upper shaft portion 11 is inserted into the shaft hole, and the circumferential sidewall of the upper shaft portion 11 contacts the inner wall of the annular protrusion 21.

[0036] Further optimized, such as Figure 1 and Figure 2As shown, in this embodiment, the inner wall of the annular protrusion 21 in the circumferential direction can also be provided with a friction coating 8. The upper shaft portion 11 is inserted into the shaft hole, and the side of the upper shaft portion 11 in the circumferential direction contacts the inner wall of the annular protrusion 21 in the circumferential direction. This arrangement can further reduce the friction between the moving scroll plate 2 and the upper shaft portion 11, and can effectively improve the service life of the assembly structure of the scroll compressor. In addition, a gap is provided between the top end of the upper shaft portion 11 and the moving scroll plate 2 to avoid friction between the top end of the upper shaft portion 11 and the moving scroll plate 2. Alternatively, the friction coating 8 can be provided only on the inner wall of the annular protrusion 21, that is, at least one of the annular protrusion 21 and the upper shaft portion 11 is provided with a friction coating 8.

[0037] Preferred, such as Figure 1 and Figure 2 As shown, in this embodiment, the outer periphery of the frame 3 can be welded and fixed to the inner wall of the casing 6 of the scroll compressor. The bottom of the frame 3 may be provided with an axially extending annular portion 31, which communicates with the inner side of the frame 3. A central shaft portion 12 can pass through the annular portion 31, and the outer periphery of the central shaft portion 12 contacts the inner wall of the annular portion 31. A friction coating 8 is provided on the outer periphery of the central shaft portion 12 to reduce friction between the central shaft portion 12 and the annular portion 31.

[0038] Further optimized, such as Figure 1 and Figure 2 As shown, in this embodiment, the inner wall of the annular portion 31 may also be provided with a friction coating 8. This arrangement can further reduce the friction between the frame 3 and the annular portion 31, and effectively improve the service life of the scroll compressor's assembly structure. Alternatively, the friction coating 8 may be provided only on the inner wall of the annular portion 31, meaning that at least one of the annular portion 31 and the central shaft portion 12 may have the friction coating 8.

[0039] Preferred, such as Figure 1 and Figure 2 As shown, in this embodiment, the lower support 4 can be installed on the inner wall of the housing 6. The lower support 4 may include a disc-shaped portion 41 and an annular portion 42. The disc-shaped portion 41 can be approximately an annular disc, and its outer periphery can be connected to the inner wall of the housing 6. The annular portion 42 can be disposed in the middle of the disc-shaped portion 41, and is integrally formed with the disc-shaped portion 41. The annular portion 42 can protrude axially from the disc-shaped portion 41, and an axial through hole is formed in the center of the annular portion 42, penetrating the disc-shaped portion 41. The lower shaft portion 13 can pass through the axial through hole, and the thrust block 5 is disposed above the annular portion 42. A friction coating 8 is provided on the outer periphery of the lower shaft portion 13 and the bottom surface of the thrust block 5 to reduce friction between the lower shaft portion 13 and the lower support 4.

[0040] Furthermore, preferably, such as Figure 1 and Figure 2 As shown, in this embodiment, the outer periphery of the lower shaft portion 13 contacts the wall surface of the axial through hole, and the bottom surface of the thrust block 5 contacts the top surface (i.e., the axial end face) of the annular portion 42. The wall surface of the axial through hole and the top surface of the annular portion 42 can both be provided with a friction coating 8. This arrangement further reduces the friction between the lower support body 4 and the lower shaft portion 13, and effectively improves the service life of the scroll compressor assembly structure. Alternatively, the friction coating 8 can be provided only on the lower support body 4, meaning that at least one of the lower shaft portion 13 and the thrust block 5 is provided with a friction coating 8.

[0041] Further optimized, such as Figure 1 and Figure 2 As shown, in this embodiment, the thrust block 5 can be formed as a ring. The thrust block 5 can be interference-fitted with the lower shaft portion 13, thereby fixing the thrust block 5 to the lower shaft portion 13. In addition, a stepped portion can also be formed between the lower shaft portion 13 and the central shaft portion 12. Specifically, the diameter of the lower shaft portion 13 is smaller than the diameter of the central shaft portion 12, such that the lower end face of the central shaft portion 12 protrudes radially from the circumferential surface of the lower shaft portion 13, and the top end of the thrust block 5 can abut against the lower end face of the central shaft portion 12 to provide axial support for the crankshaft 1.

[0042] Preferably, in this embodiment, the materials of the moving scroll plate 2, the frame 3, and the lower support 4 can be HT250, aluminum alloy, stainless steel, alloy steel, etc. The materials of the crankshaft 1 and the thrust block 5 can be 45 steel, 40Cr, HT250, stainless steel, alloy steel, etc. This ensures the strength and service life of the scroll compressor's assembly structure.

[0043] In addition, such as Figure 1 and Figure 2 As shown, according to a second aspect of the present invention, a scroll compressor is provided, the scroll compressor comprising the scroll compressor assembly structure described above.

[0044] During operation, a friction coating 8 is provided between the crankshaft 1 and the shaft hole of the moving scroll disk 2 of the scroll compressor, replacing the original upper bearing structure. A friction coating 8 is also provided at the contact point between the crankshaft 1 and the frame 3, replacing the original middle bearing structure. A friction coating 8 is also provided at the contact point between the crankshaft 1 and the lower support 4, replacing the original lower bearing structure. Thus, by using a friction coating 8 that reduces friction, the scroll compressor replaces the more expensive bearing structure, thereby effectively reducing production costs.

[0045] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The scope of protection of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An assembly structure for a scroll compressor, disposed within a scroll compressor, characterized in that, The assembly structure of the scroll compressor includes: Crankshaft; A moving scroll plate, wherein a shaft hole is provided at the bottom of the moving scroll plate, the end of the crankshaft is inserted into the shaft hole, and a friction coating that can reduce friction is provided between the crankshaft and the shaft hole; A frame, through which the crankshaft passes, and the friction coating is provided at the contact point between the crankshaft and the frame; and The crankshaft passes through the lower support body, a thrust block is mounted on the crankshaft, and the contact position between the crankshaft, the thrust block and the lower support body is provided with the friction coating.

2. The assembly structure of a scroll compressor according to claim 1, wherein The crankshaft includes: The upper shaft is partially inserted into the shaft hole of the moving scroll plate. The portion of the upper shaft inserted into the shaft hole is provided with the friction coating. The friction coating is provided on the circumferential side of the upper shaft. A central shaft portion is disposed below the upper shaft portion, the central shaft portion passes through the frame, and the portion of the central shaft portion in contact with the frame is provided with the friction coating, the friction coating being disposed on the circumferential side of the central shaft portion; and The lower shaft portion is disposed below the central shaft portion and passes through the lower support body. The thrust block is installed on the lower shaft portion, and the bottom of the thrust block contacts the top of the lower support body. The friction coating is provided at the positions of the lower shaft portion and the thrust block that contact the lower support body.

3. The assembling structure of a scroll compressor according to claim 1 or 2, characterized in that, The bottom of the moving scroll disk is provided with an annular protrusion that protrudes axially, and the shaft hole is formed inside the annular protrusion.

4. The assembly structure of a scroll compressor according to claim 3, wherein The friction coating is provided on the inner wall of the annular protrusion in the circumferential direction. The side of the crankshaft in the circumferential direction is in contact with the inner wall of the annular protrusion in the circumferential direction. There is a gap between the top of the crankshaft and the moving scroll disk.

5. The assembling structure of a scroll compressor according to claim 1 or 2, wherein The bottom of the frame is provided with an axially extending annular portion, through which the crankshaft passes, and the outer periphery of the crankshaft contacts the inner wall of the annular portion.

6. The assembly structure of the scroll compressor according to claim 5, characterized in that, The inner wall of the annular portion is provided with the friction coating.

7. The assembling structure of a scroll compressor according to claim 1 or 2, wherein The lower support includes: A disc-shaped portion, the outer periphery of which is connected to the inner wall of the casing of the scroll compressor; and An annular portion is disposed in the middle of the disc-shaped portion. The annular portion protrudes axially from the disc-shaped portion. An axial through hole is formed in the center of the annular portion. The axial through hole penetrates the disc-shaped portion. The crankshaft passes through the axial through hole. The thrust block is disposed above the annular portion.

8. The assembly structure of a scroll compressor according to claim 7, wherein The outer periphery of the crankshaft contacts the wall surface of the axial through hole, the bottom surface of the thrust block contacts the top surface of the annular portion, and the friction coating is provided on the wall surface of the axial through hole and the top surface of the annular portion.

9. The assembly structure of a scroll compressor according to claim 7, wherein The thrust block is formed in a ring shape and is interference-fitted with the crankshaft.

10. A scroll compressor characterized by, The scroll compressor includes the assembly structure of the scroll compressor as described in any one of claims 1 to 9.

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