Eccentric shaft assembly, scroll compressor, air conditioner

Abstract

The present invention provides an eccentric shaft assembly, a scroll compressor, and an air conditioner, wherein the eccentric shaft assembly includes a driving main shaft and an eccentric shaft eccentrically located at one end of the driving main shaft, the eccentric shaft has an eccentric portion, and also includes an eccentric sleeve, the eccentric sleeve has a rotation angle limiting structure, when the eccentric shaft is driven to rotate, the eccentric portion and the rotation angle limiting structure cooperate to form a first rotation angle limiting position of the eccentric sleeve in a first rotation direction and a second rotation angle limiting position in a second rotation direction, and the first rotation direction is opposite to the second rotation direction. According to the present invention, the circumferential rotation limiting of the eccentric shaft sleeve is achieved only by using the internal structure of the assembly, without the need for matching and modifying adjacent components, and the structural size of the assembly is made more compact while reducing the shaft system length of the eccentric shaft assembly.

Description

Technical Field

[0001] The invention belongs to the technical field of compressor manufacturing, and in particular relates to an eccentric shaft assembly, a scroll compressor, and an air conditioner. Background Art

[0002] like Figure 1 and Figure 2 As shown, the related technology discloses an eccentric shaft assembly, which includes a driving main shaft a9 and an eccentric shaft a17 eccentrically arranged with the driving main shaft a9, and an eccentric sleeve a18 is sleeved on the outer periphery of the eccentric shaft a17. In order to limit the circumferential rotation angle of the eccentric sleeve a18 around the eccentric shaft a17, in the prior art, a limiting portion protruding from the end face of the eccentric sleeve a18 is provided on the axial end of the eccentric sleeve a18 facing the driving main shaft a9, and then the circumferential rotation angle is limited by the matching relationship between the limiting portion and the adjacent component such as the upper bracket a7. In this way, since the limiting portion protrudes from the axial end side of the eccentric sleeve a18, the axial length of the eccentric shaft assembly is increased, that is, the shaft system length of the compressor is increased, which will undoubtedly increase the weight and cost of the compressor and even increase the operating vibration and noise of the compressor. Summary of the invention

[0003] Therefore, the present invention provides an eccentric shaft assembly, a scroll compressor, and an air conditioner, which can overcome the disadvantage of the eccentric shaft assembly in the related art that the shaft length is too long due to the need to limit the circumferential rotation angle of the eccentric sleeve.

[0004] In order to solve the above problems, the present invention provides an eccentric shaft assembly, including a driving main shaft and an eccentric shaft eccentrically located at one end of the driving main shaft, the eccentric shaft having an eccentric portion and an eccentric sleeve, the eccentric sleeve having a rotation angle limiting structure, when the eccentric shaft is driven to rotate, the eccentric portion and the rotation angle limiting structure cooperate to form a first rotation angle limiting position of the eccentric sleeve in a first rotation direction and a second rotation angle limiting position in a second rotation direction, the first rotation direction is opposite to the second rotation direction.

[0005] In some embodiments, any plane perpendicular to the axis of the drive spindle is a first projection plane, and in the projection on the first projection plane, the projection of the eccentric portion is a first circle, the projection of the rotation angle limiting structure includes a first arc, the center of the first arc does not coincide with the center of the first circle, the first rotation angle limit position includes the first endpoint of the first arc, and the second rotation angle limit position includes the second endpoint of the first arc.

[0006] In some embodiments, the projection of the rotation angle limiting structure also includes a second arc, the center of the second arc does not coincide with the center of the first circle, the first rotation angle limiting position also includes a third endpoint of the second arc, the third endpoint is set corresponding to the first endpoint, and the second rotation angle limiting position also includes a fourth endpoint of the second arc, and the fourth endpoint is set corresponding to the second endpoint.

[0007] In some embodiments, the axial ends of the eccentric portion respectively have a second extending shaft segment and a first extending shaft segment, wherein the second extending shaft segment is connected to the driving main shaft, the eccentric sleeve has a sleeve and a counterweight portion connected to the sleeve through a connecting portion, the sleeve is sleeved on the first extending shaft segment, and the first arc and / or the second arc are within the projection range of the sleeve on the first projection plane.

[0008] In some embodiments, the rotation angle limiting structure is located on a side of the connecting portion facing the driving spindle.

[0009] In some embodiments, any plane perpendicular to the axis of the drive spindle is a first projection plane, and in the projection on the first projection plane, the projection of the eccentric portion is a first circle, the projection of the rotation angle limiting structure includes intersecting third arc and fourth arc, the first rotation angle limit position includes a first point tangent to the first circle, and the second rotation angle limit position includes a second point tangent to the first circle, wherein the first point is on the third arc, and the second point is on the fourth arc.

[0010] In some embodiments, any plane perpendicular to the axis of the drive spindle is a first projection plane, and in the projection on the first projection plane, the projection of the eccentric portion is a first sector, and the projection of the rotation angle limiting structure includes a first limiting edge corresponding to the first radial edge of the first sector and a second limiting edge corresponding to the second radial edge of the first sector, the first rotation angle limiting position includes the first limiting edge, and the second rotation angle limiting position includes the second limiting edge.

[0011] In some embodiments, the contact portion between the eccentric portion and the rotation angle limiting structure has a vibration-damping and sound-absorbing material; and / or the eccentric portion and the eccentric shaft are integrally formed; or the eccentric portion and the eccentric shaft are detachably connected.

[0012] The present invention also provides a scroll compressor, comprising the above-mentioned eccentric shaft assembly.

[0013] The present invention also provides an air conditioner, comprising the scroll compressor.

[0014] The present invention provides an eccentric shaft assembly, a scroll compressor, and an air conditioner, wherein the rotation angle of the eccentric sleeve is restricted by the matching position of the eccentric portion of the eccentric shaft and the eccentric sleeve, that is, the circumferential rotation limitation of the eccentric sleeve is achieved by utilizing only the internal structure of the assembly, and there is no need for matching and modifying adjacent components. The shaft length of the eccentric shaft assembly is reduced while the structural dimensions of the assembly are made more compact. When applied to the compressor, the distance between the moving plate support bearing and the driving main bearing is shortened, thereby reducing vibration noise, and reducing the length and weight of the compressor, which is very suitable for the design trend of lightweight and compact compressors for electric vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the internal structure of a scroll compressor in the related art;

[0016] Figure 2 for Figure 1 Schematic diagram of the assembly structure at the position of the middle eccentric shaft assembly;

[0017] Figure 3 A schematic structural diagram of an eccentric shaft assembly according to an embodiment of the present invention;

[0018] Figure 4 for Figure 2 Schematic diagram of the assembly structure of the eccentric shaft assembly and other parts of the compressor;

[0019] Figure 5 for Figure 1 An implementation method of the eccentric shaft;

[0020] Figure 6 for Figure 1 Another embodiment of the eccentric shaft;

[0021] Figure 7 for Figure 1 An implementation method of the eccentric sleeve;

[0022] Figure 8 for Figure 7 Schematic diagram of circumferential rotation limit between the eccentric sleeve and the eccentric shaft;

[0023] Fig. 9 for Figure 1 Another embodiment of the eccentric sleeve;

[0024] Fig.10 for Fig. 9 Schematic diagram of circumferential rotation limit between the eccentric sleeve and the eccentric shaft;

[0025] Fig.11 for Figure 1 Another embodiment of the eccentric sleeve;

[0026] Fig.12 for Fig.11 Schematic diagram of circumferential rotation limit between the eccentric sleeve and the eccentric shaft;

[0027] Fig.13 for Figure 1 Another embodiment of the eccentric sleeve;

[0028] Fig.14 for Fig.13 Schematic diagram of the circumferential rotation limit between the eccentric sleeve and the eccentric shaft.

[0029] The reference numerals are:

[0030] 1. Driving main shaft; 2. Eccentric shaft; 21. Eccentric part; 22. First extending shaft section; 23. Second extending shaft section; 3. Eccentric sleeve; 31. Rotation angle limiting structure; 311. First end point; 312. Second end point; 313. Third end point; 314. Fourth end point; 315. First point; 316. Second point; 317. First limiting edge; 318. Second limiting edge; 32. Sleeve; 33. Connecting part; 34. Counterweight part; a1. Upper cover; a2. O-ring; a4. Stationary scroll; a5. Moving scroll; a6. Annular seal; a7. Upper bracket; a8. Casing; a9. Driving main shaft; a10. Rotor; a11. Stator; a12. Auxiliary bearing; a13. Auxiliary balance block; a14. Main balance block; a15. Sealing shaft seal; a 16. Main bearing; a 17. Eccentric shaft; a 18. Eccentric sleeve; a 19. Moving plate drive bearing. DETAILED DESCRIPTION

[0031] See also Figure 1 and Figure 2As shown, the scroll compressor in the related art includes an upper cover a1, an O-ring a2, a fixed scroll plate a4, a movable scroll plate a5, an annular sealing ring a6, an upper bracket a7, a casing a8, a driving main shaft a9, a rotor a10, a stator a11, a secondary bearing a12, a secondary balancing block a13, a main balancing block a14, a sealing shaft seal a15, a main bearing a16, an eccentric shaft a17, an eccentric sleeve a18, and a movable plate driving bearing a19. The stator a11 and the rotor a10 constituting the driving motor are built into the casing a8. The driving motor drives the main shaft a9 to rotate. The crankshaft is circumferentially and radially constrained by the secondary bearing a12 and the main bearing a16 to ensure the coaxiality of the compressor shaft system. The crankshaft driving end supports the eccentric sleeve a18 through the eccentric shaft a17 to drive the movable scroll plate a5 to rotate around the fixed scroll plate a4. The volume of the compression chamber formed by the fixed scroll a4 and the movable scroll a5 in the casing a8 increases and decreases periodically, forming a compression chamber for compressing the refrigerant, thereby completing the continuous compression of the refrigerant sucked into the compression chamber. Among them, the driving main shaft a9, the eccentric shaft a17, and the eccentric sleeve a18 constitute an eccentric shaft assembly. Specifically, the eccentric shaft assembly includes the driving main shaft a9, the eccentric shaft a17 eccentrically arranged on the main shaft, and the eccentric shaft a17 is axially arranged in the corresponding main shaft pin hole from the main shaft close to the side end face of the movable disk, parallel to the main shaft on the axis and at a certain distance, and an eccentric sleeve a18 is nested between the main shaft and the movable disk. The eccentric sleeve can accommodate the eccentric shaft inside in the axial direction and support the movable disk drive bearing a19 outside, and can rotate freely between the two. The eccentric sleeve is accommodated in the accommodation space of the upper bracket, and the movable disk drive bearing is arranged in the movable disk bearing accommodation hole. With such a configuration, when the main shaft rotates around its own axis, the eccentric shaft a17 is driven to rotate by the eccentric shaft, and the eccentric shaft drives the eccentric sleeve, and the eccentric sleeve supports the moving disk drive bearing, and finally drives the moving disk to rotate around the center of the crankshaft at a certain distance, and finally drives the motor to drive the moving scroll disk to move around the fixed scroll disk according to the constraint design distance, so as to form a compression chamber with periodic changes between the moving and fixed disks, and complete the suction, compression and exhaust of the refrigerant. At the same time, since the eccentric sleeve can rotate around the eccentric shaft, that is, the eccentric sleeve shaft portion that drives the moving disk drive bearing can rotate circumferentially around the eccentric shaft, that is, the center of the moving disk can rotate around the eccentric shaft, as the moving disk rotates around the eccentric shaft, the distance between the moving disk and the fixed disk center can change within a certain degree, so as to realize the contact force between the tooth wall of the moving scroll disk and the tooth wall of the fixed scroll disk under special working conditions, and improve the reliability and performance of the compressor. In order to prevent the eccentric sleeve from rotating around the eccentric shaft at a large axial rotation angle during the startup, centering and abnormal shutdown of the compressor, resulting in unstable operation or interference with the bracket accommodating cavity, it is necessary to limit the circumferential rotation angle of the eccentric sleeve around the eccentric shaft. It has the deficiencies mentioned in the background technology, and the eccentric shaft assembly is improved based on the aforementioned deficiencies.

[0032] See also Figures 3 to 14As shown, according to an embodiment of the present invention, an eccentric shaft assembly is provided, including a driving main shaft 1 and an eccentric shaft 2 eccentrically located at one end of the driving main shaft 1, the eccentric shaft 2 having an eccentric portion 21, and also including an eccentric sleeve 3, the eccentric sleeve 3 having a rotation angle limiting structure 31, when the eccentric shaft 2 is driven to rotate, the eccentric portion 21 cooperates with the rotation angle limiting structure 31 to form a first rotation angle limiting position of the eccentric sleeve 3 in a first rotation direction and a second rotation angle limiting position in a second rotation direction, the first rotation direction is opposite to the second rotation direction. In this technical solution, the rotation angle of the eccentric sleeve 3 is limited by the matching position of the eccentric part 21 of the eccentric shaft 2 and the eccentric sleeve 3, that is, the circumferential rotation limit of the eccentric sleeve 3 is achieved only by using the internal structure of the component, and there is no need to modify the matching of adjacent components. While reducing the shaft length of the eccentric shaft component, the structural dimensions of the component are made more compact. After being applied to the compressor, the distance between the moving plate support bearing and the driving main bearing is shortened, and the vibration noise, compressor length and weight are reduced. It is very suitable for the design trend of lightweight and compact compressors for electric vehicles. In addition, in some cases, the axial size of the rotation angle limiting structure 31 can also be designed to be larger to prevent the reliability problem of fracture failure caused by the low structural strength of the rotation angle limiting structure 31 and the eccentric part 21 when the compressor is shut down at high speed or started and stopped frequently, thereby improving the reliability of the compressor.

[0033] See also Figure 7 and Figure 8As shown, in some embodiments, any plane perpendicular to the axis of the driving spindle 1 is a first projection plane, and in the projection on the first projection plane, the projection of the eccentric portion 21 is a first circle, and the projection of the rotation angle limiting structure 31 includes a first arc, and the center of the first arc does not coincide with the center of the first circle, and the first rotation angle limiting position includes a first endpoint 311 of the first arc, and the second rotation angle limiting position includes a second endpoint 312 of the first arc, that is, in this technical solution, the circumferential rotation of the eccentric sleeve 3 is limited by different contact points of the first circle and the first arc, that is, the first endpoint 311 and the second endpoint 312. In fact, it can be understood that the first endpoint 311 and the second endpoint 312 are formed by projection, and they actually correspond to two contact lines extending along the axial direction of the driving spindle 1. It should be noted that the specific positions of the first endpoint 311 and the second endpoint 312 are related to the diameter of the eccentric portion 21, the diameter of the arc segment in which the rotation angle limiting structure 31 cooperates with the eccentric portion 21, the eccentric distance between the above two and other dimensions. This is conventional for those skilled in the art and will not be elaborated in the present invention. However, it is clear that no matter what method is adopted, the eccentric portion 21 should only contact the rotation angle limiting structure 31 between the first rotation angle limiting position and the second rotation angle limiting position, and there should be no contact point during the rotation process between the two. This principle runs through all embodiments of the present invention and will not be elaborated in the following text.

[0034] Continue to see Fig. 9 and Fig.10 In some embodiments, the projection of the rotation angle limiting structure 31 further includes a second arc, the center of the second arc does not coincide with the center of the first circle, the first rotation angle limiting position further includes a third endpoint 313 of the second arc, the third endpoint 313 is set corresponding to the first endpoint 311, and the second rotation angle limiting position further includes a fourth endpoint 314 of the second arc, the fourth endpoint 314 is set corresponding to the second endpoint 312. In this technical solution, the first endpoint 311 and the third endpoint 313 are used to jointly limit the position of the eccentric sleeve 3 at the first rotation angle limiting position, and the second endpoint 312 and the fourth endpoint 314 are used to jointly limit the position of the eccentric sleeve 3 at the second rotation angle limiting position, which can form simultaneous multi-point (multi-line) limiting, balance the impact force of the limiting contact, increase the stability of the contact limiting, reduce the strength of the limiting position and the contact noise, can effectively reduce the disadvantages such as wear caused by contact, and improve the service life of parts.

[0035] The axial ends of the eccentric portion 21 respectively have a first extending shaft segment 22 and a second extending shaft segment 23, wherein the second extending shaft segment 23 is connected to the driving main shaft 1, and the eccentric sleeve 3 has a sleeve 32 and a counterweight portion 34 connected to the sleeve 32 through a connecting portion 33, and the sleeve 32 is sleeved on the first extending shaft segment 22, and the first arc and / or the second arc are within the projection range of the sleeve 32 on the first projection plane, so that the slotted portion of the rotation angle limiting structure 31 can be closer to the sleeve 32, effectively preventing the cantilever structure arm length from being longer due to the long distance, thereby affecting the structural strength of the eccentric sleeve 3.

[0036] The rotation angle limiting structure 31 is located on the side of the connecting portion 33 facing the driving spindle 1 , so that the connecting portion 33 can be clamped by the upper bracket and the eccentric portion 21 adjacent thereto to form a reliable axial limit.

[0037] See also Fig.11 and Fig.12 As shown, in some embodiments, any plane perpendicular to the axis of the drive spindle 1 is a first projection plane, and in the projection on the first projection plane, the projection of the eccentric portion 21 is a first circle, and the projection of the rotation angle limiting structure 31 includes intersecting third arcs and fourth arcs, and the first rotation angle limiting position includes a first point 315 tangent to the first circle, and the second rotation angle limiting position includes a second point 316 tangent to the first circle, wherein the first point 315 is on the third arc, and the second point 316 is on the fourth arc. In a specific embodiment, the third arc and the fourth arc can be constructed into an elliptical hole, and the first point 315 and the second point 316 are tangent to the first circle, respectively, which can effectively prevent the eccentric sleeve 3 from getting stuck at the first rotation angle limiting position and the second rotation angle limiting position, thereby protecting the matching components.

[0038] See also Fig.13 and Fig.14As shown, in some embodiments, any plane perpendicular to the axis of the drive spindle 1 is a first projection plane, and on the projection on the first projection plane, the projection of the eccentric portion 21 is a first sector, and the projection of the rotation angle limiting structure 31 includes a first limiting edge 317 corresponding to the first radial edge of the first sector and a second limiting edge 318 corresponding to the second radial edge of the first sector, the first rotation angle limiting position includes the first limiting edge 317, and the second rotation angle limiting position includes the second limiting edge 318. This technical solution is different from the aforementioned technical solution in that the first radial edge and the second radial edge are in fact a plane, and similarly, the first limiting edge 317 and the second limiting edge 318 corresponding thereto also form a plane. In specific limiting, the aforementioned line contact limiting is improved to the plane limiting in this technical solution, and the impact force is balanced during circumferential limiting, which has the advantages of small limiting stress, small noise, stable limiting and timely limiting release.

[0039] In some embodiments, the contact portion between the eccentric portion 21 and the rotation angle limiting structure 31 has vibration-damping and sound-absorbing materials. It can be understood that in some cases, the eccentric portion 21 can be made entirely of the aforementioned vibration-damping and sound-absorbing materials. For example, engineering plastics can be used to wrap the corresponding portion to achieve buffering and vibration reduction of the impact during the limiting process.

[0040] In some embodiments, the eccentric portion 21 can be integrally formed with the eccentric shaft 2, which can reduce the assembly process and improve production efficiency; or, the eccentric portion 21 and the eccentric shaft 2 are detachably connected. In this case, the eccentric portion 21 can be made of the aforementioned vibration-damping and sound-absorbing material. Compared with the technical solution of setting the vibration-damping and sound-absorbing material on the end face of the driving shaft in the related art, the size of the eccentric portion 21 can be set smaller, thereby reducing the use of the vibration-damping and sound-absorbing material, and effectively reducing the cost of parts production and processing and the use of shock-absorbing materials.

[0041] According to an embodiment of the present invention, there is also provided a scroll compressor, comprising the above-mentioned eccentric shaft assembly.

[0042] According to an embodiment of the present invention, there is also provided an air conditioner, comprising the scroll compressor described above.

[0043] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. An eccentric shaft assembly, characterized in that: The invention comprises a driving main shaft (1) and an eccentric shaft (2) eccentrically located at one end of the driving main shaft (1), the eccentric shaft (2) having an eccentric portion (21), and an eccentric sleeve (3), the eccentric sleeve (3) having a rotation angle limiting structure (31), when the eccentric shaft (2) is driven to rotate, the eccentric portion (21) and the rotation angle limiting structure (31) cooperate to form a first rotation angle limiting position of the eccentric sleeve (3) in a first rotation direction and a second rotation angle limiting position in a second rotation direction, the first rotation direction and the second rotation direction being respectively The rotation directions are opposite; any plane perpendicular to the axis of the driving main shaft (1) is a first projection plane, and in the projection on the first projection plane, the projection of the eccentric portion (21) is a first circle, the projection of the rotation angle limiting structure (31) includes a first arc, the center of the first arc does not coincide with the center of the first circle, the first rotation angle limiting position includes a first endpoint (311) of the first arc, and the second rotation angle limiting position includes a second endpoint (312) of the first arc; the projection of the rotation angle limiting structure (31) also includes a second arc, the center of the second arc does not coincide with the center of the first circle, the first rotation angle limiting position also includes a third endpoint (313) of the second arc, the third endpoint (313) is arranged corresponding to the first endpoint (311), and the second rotation angle limiting position also includes a fourth endpoint (314) of the second arc, the fourth endpoint (314) is arranged corresponding to the second endpoint (312); the axial ends of the eccentric portion (21) respectively have a second extending shaft segment (23) and a first extending shaft segment (23). The eccentric sleeve (3) comprises a sleeve (32) and a counterweight portion (34) connected to the sleeve (32) via a connecting portion (33); the sleeve (32) is sleeved on the first extending shaft segment (22); the first circular arc and / or the second circular arc are within the projection range of the sleeve (32) on the first projection plane; and a contact portion between the eccentric portion (21) and the rotation angle limiting structure (31) comprises a vibration-damping and sound-absorbing material.

2. The eccentric shaft assembly according to claim 1, characterized in that: The rotation angle limiting structure (31) is located on a side of the connecting portion (33) facing the driving spindle (1).

3. The eccentric shaft assembly according to claim 1, characterized in that: The eccentric portion (21) and the eccentric shaft (2) are integrally formed; or, the eccentric portion (21) and the eccentric shaft (2) are detachably connected.

4. An eccentric shaft assembly, characterized in that: The invention comprises a driving main shaft (1) and an eccentric shaft (2) eccentrically located at one end of the driving main shaft (1), the eccentric shaft (2) having an eccentric portion (21), and an eccentric sleeve (3), the eccentric sleeve (3) having a rotation angle limiting structure (31), when the eccentric shaft (2) is driven to rotate, the eccentric portion (21) and the rotation angle limiting structure (31) cooperate to form a first rotation angle limiting position of the eccentric sleeve (3) in a first rotation direction and a second rotation angle limiting position in a second rotation direction, the first rotation direction being opposite to the second rotation direction; any plane perpendicular to the axis of the driving main shaft (1) is a first projection plane, on the projection of the first projection plane, the projection of the eccentric portion (21) is a first circle, the projection of the rotation angle limiting structure (31) comprises a third circular arc and a fourth circular arc intersecting each other, and the first rotation angle limiting position comprises a first point (315) tangent to the first circle. The second rotation angle limiting position includes a second point (316) tangent to the first circle, wherein the first point (315) is located on the third circular arc, and the second point (316) is located on the fourth circular arc; and a contact portion between the eccentric portion (21) and the rotation angle limiting structure (31) has a vibration-damping and sound-absorbing material.

5. The eccentric shaft assembly according to claim 4, characterized in that: The eccentric portion (21) and the eccentric shaft (2) are integrally formed; or, the eccentric portion (21) and the eccentric shaft (2) are detachably connected.

6. An eccentric shaft assembly, characterized in that: The invention comprises a driving main shaft (1) and an eccentric shaft (2) eccentrically located at one end of the driving main shaft (1), the eccentric shaft (2) having an eccentric portion (21), and an eccentric sleeve (3), the eccentric sleeve (3) having a rotation angle limiting structure (31), and when the eccentric shaft (2) is driven to rotate, the eccentric portion (21) and the rotation angle limiting structure (31) cooperate to form a first rotation angle limiting position of the eccentric sleeve (3) in a first rotation direction and a second rotation angle limiting position in a second rotation direction, the first rotation direction being opposite to the second rotation direction; any one of the axes perpendicular to the axis of the driving main shaft (1) The plane is a first projection plane, and in the projection on the first projection plane, the projection of the eccentric portion (21) is a first sector, the projection of the rotation angle limiting structure (31) includes a first limiting edge (317) corresponding to a first radial edge of the first sector, and a second limiting edge (318) corresponding to a second radial edge of the first sector, the first rotation angle limiting position includes the first limiting edge (317), and the second rotation angle limiting position includes the second limiting edge (318); and a contact portion between the eccentric portion (21) and the rotation angle limiting structure (31) has a vibration-damping and sound-absorbing material.

7. The eccentric shaft assembly according to claim 6, characterized in that: The eccentric portion (21) and the eccentric shaft (2) are integrally formed; or, the eccentric portion (21) and the eccentric shaft (2) are detachably connected.

8. A scroll compressor, characterized in that: The invention comprises the eccentric shaft assembly according to any one of claims 1 to 7.

9. An air conditioner, characterized in that: Includes the scroll compressor as described in claim 8.

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