Crankshaft assembly and compressor

Abstract

The invention provides a crankshaft assembly and a compressor. An oil outlet channel and a communicating channel are formed in an eccentric part; a first oil guide groove is concavely formed in the peripheral surface of the eccentric part; the upper end and the lower end of the first oil guide groove respectively extend towards the upper end and the lower end of the eccentric part; the inner end of the oil outlet channel is communicated with the central through hole, and the outer end of the oil outlet channel extends to the groove bottom wall of the first oil guide groove; a spiral second oil guide groove is formed between the outer peripheral surface of the eccentric part and the inner peripheral surface of the roller; the upper end of the second oil guide groove is directly communicated with or not directly communicated with the upper end of the first oil guide groove; the lower end of the second oil guide groove extends to the lower end of the first oil guide groove and is communicated with the lower end of the first oil guide groove; from the lower end of the second oil guide groove, the spiral direction of the second oil guide groove is opposite to the rotating direction of the crankshaft; a containing groove used for containing the rolling part is formed in the lower thrust face of the eccentric part, the first end of the communicating channel communicates with the center through hole, and the second end of the communicating channel communicates with the containing groove.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a crankshaft assembly and a compressor. Background Art

[0002] Rotary compressors are commonly used compressors in household air conditioners. Their internal power source is provided by a motor, which drives the rollers inside the pump body to rotate at high speed to achieve the gas / liquid phase change of the refrigerant in the air conditioner, thereby achieving the purpose of cooling and heating.

[0003] The crankshaft is an important transmission component in the compressor. When it rotates at high speed, it relies on centrifugal force to introduce lubricating oil from the bottom oil pool to various parts of the parts, forming an oil film on the surface of the moving parts to ensure that the moving parts of the compressor can operate flexibly and efficiently.

[0004] However, changes made by users to the air-conditioning functions (such as temperature rise and fall, mode change, start and stop, etc.) make it easy for the rotary compressor to have a situation where the oil film is not formed in time or the oil viscosity is too low, resulting in an increased probability of contact friction between the upper / lower flanges and rollers and the crankshaft. Especially in low-frequency operation mode, the lubricating oil in the oil pool is difficult to be transported to the upper parts, which may cause contact friction; when the above-mentioned contact friction occurs, it causes deformation on the surface of the parts, resulting in a continuous deterioration of mechanical efficiency, and even causing risks such as instability and component failure. Therefore, it is necessary to achieve rapid infiltration of various parts of the parts to avoid structural failure due to friction. Summary of the invention

[0005] The main purpose of the present invention is to provide a crankshaft assembly and a compressor to improve the lubrication effect.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a crankshaft assembly is provided, which includes a crankshaft and a roller, wherein the crankshaft has a central through hole and includes an eccentric portion; the roller is sleeved on the eccentric portion; an oil outlet channel and a connecting channel are provided on the eccentric portion; a first oil guide groove is concavely provided on the outer peripheral surface of the eccentric portion, and the upper end and the lower end of the first oil guide groove are respectively extended toward the upper end and the lower end of the eccentric portion; the inner end of the oil outlet channel is connected to the central through hole, and the outer end of the oil outlet channel extends to the groove bottom wall of the first oil guide groove; a second spiral oil guide groove is formed between the outer peripheral surface of the eccentric portion and the inner peripheral surface of the roller; the second oil guide groove The upper end of the connecting channel extends to the upper end of the first oil guiding groove, and the upper end of the second oil guiding groove is directly connected or not directly connected to the upper end of the first oil guiding groove; the lower end of the second oil guiding groove extends to the lower end of the first oil guiding groove and is connected to the lower end of the first oil guiding groove; from the lower end of the second oil guiding groove, the spiral direction of the second oil guiding groove is opposite to the rotation direction of the crankshaft; a receiving groove for accommodating the rolling part is provided on the lower thrust surface of the eccentric part, the first end of the connecting channel is connected to the central through hole, and the second end of the connecting channel is connected to the receiving groove; when the crankshaft rotates, the rolling part is driven to roll; the rolling axis of the rolling part is perpendicular to the central axis of the crankshaft.

[0007] Furthermore, the crankshaft assembly also includes: a lower flange, which is sleeved on the crankshaft; the upper surface of the lower flange is in contact with or has a gap with the lower thrust surface of the eccentric part; the upper surface of the lower flange is provided with an annular rolling track groove, and the rolling part is arranged to roll along the rolling track groove.

[0008] Furthermore, the number of the receiving groove and the number of the communicating channels are one or multiple, and the multiple receiving grooves and the multiple communicating channels are arranged in one-to-one correspondence; and a rolling portion is arranged in each receiving groove.

[0009] Furthermore, the rolling portion is a spherical structure.

[0010] Furthermore, the second oil guide groove is arranged on the outer peripheral surface of the eccentric portion or the inner peripheral surface of the roller.

[0011] Furthermore, the depth of the second oil guiding groove is in the range of greater than or equal to 0.2 mm and less than or equal to 1 mm.

[0012] Furthermore, the first oil guiding groove is a strip-shaped groove.

[0013] Further, the upper end of the first oil guide groove is located at the upper end of the eccentric portion.

[0014] Further, the lower end of the first oil guiding groove is located at the lower end of the eccentric portion.

[0015] Furthermore, the first oil guiding groove is extended along the axial direction of the eccentric portion.

[0016] Further, there is one oil outlet channel, and the outer end of the oil outlet channel is located between the upper end and the lower end of the first oil guide groove or at the lower end of the first oil guide groove. Alternatively, there are multiple oil outlet channels, and the outer end of one of the multiple oil outlet channels is located between the upper end and the lower end of the first oil guide groove, and the outer end of another of the multiple oil outlet channels is located at the lower end of the first oil guide groove.

[0017] Further, the diameter of the eccentric portion is Φ2, the width of the second oil guide groove along the radial direction of the eccentric portion is D, and 0.01≤D / Φ2≤0.05.

[0018] Furthermore, the axial height of the eccentric portion is X, the axial width of the second oil guide groove along the eccentric portion is L, the axial height of the contact surface between the eccentric portion and the roller is H, the diameter or equivalent diameter of the oil outlet channel is Φ1, 0.3Φ1≤L≤0.15H; H <X。

[0019] Furthermore, the rolling portion is a spherical structure, the groove wall surface of the accommodating groove matches and fits with the outer wall surface of the rolling portion, and the groove wall surface of the accommodating groove is a part of a preset spherical surface; the radius of the preset spherical surface is R2; the diameter or equivalent diameter of the connecting channel is Φ3, the diameter or equivalent diameter of the oil outlet channel is Φ1, 0.3Φ1≤Φ3≤0.6Φ1, 0.7Φ3≤R2≤Φ3.

[0020] Furthermore, the diameter of the rolling portion is Φ4; 1.98R2≤Φ4<2R2.

[0021] Furthermore, the groove side wall of the rolling track groove in a cross section perpendicular to its extension direction is arc-shaped and has a radius of R1. The groove side wall of the rolling track groove matches and fits with the outer wall surface of the rolling part, and R1=R2.

[0022] Furthermore, when the crankshaft is in a stationary state, the axial height of the gap between the lower thrust surface of the eccentric portion and the lower flange is S; the axial height of the eccentric portion is X, and the axial height of the roller is Y; 0.3*(YX)≤S≤0.6*(YX).

[0023] Furthermore, a blind hole oil plug is provided at the upper end of the central through hole.

[0024] According to another aspect of the present invention, a compressor is provided, comprising the above crankshaft assembly.

[0025] By applying the technical solution of the present invention, the crankshaft assembly includes a crankshaft and a roller, the crankshaft includes an eccentric portion, and the roller is sleeved on the eccentric portion so that the crankshaft drives the roller to rotate.

[0026] The crankshaft has a central through hole, and a first oil guide groove is concavely provided on the outer peripheral surface of the eccentric part, and the upper and lower ends of the first oil guide groove are respectively extended toward the upper and lower ends of the eccentric part; the inner end of the oil outlet channel is connected with the central through hole, and the outer end of the oil outlet channel extends to the bottom wall of the first oil guide groove, so that the outer end of the oil outlet channel is connected with the first oil guide groove.

[0027] A second oil guide groove in a spiral shape is formed between the outer circumference of the eccentric part and the inner circumference of the roller; the upper end of the second oil guide groove extends to the upper end of the first oil guide groove, and the upper end of the second oil guide groove is directly connected to the upper end of the first oil guide groove or not directly connected; the lower end of the second oil guide groove extends to the lower end of the first oil guide groove, and the lower end of the second oil guide groove is directly connected to the lower end of the first oil guide groove. Starting from the lower end of the second oil guide groove, that is, the lower end of the second oil guide groove as the starting end, the spiral direction of the second oil guide groove is opposite to the rotation direction of the crankshaft. The lower end of the second oil guide groove is its liquid inlet end.

[0028] During the rotation of the crankshaft, the lubricating oil in the compressor oil pool is pumped into the central through hole from the lower end of the central through hole; the lubricating oil in the central through hole flows into the first oil guide groove through the oil outlet channel, and then flows into the second oil guide groove; wherein, the lubricating oil enters the second oil guide groove from the lower end of the second oil guide groove. A part of the lubricating oil in the second oil guide groove is immersed in the interface gap between the eccentric part and the roller for lubrication; the other part flows upward along the second oil guide groove to flow to the upper end of the eccentric part, and flows to between the upper thrust surface 1011 of the eccentric part and the upper flange 91, and between the long shaft section 102 and the upper flange 91; by continuously delivering the lubricating oil to the upper end of the eccentric part, the lubricating oil can more efficiently penetrate the matching gap between the crankshaft and the upper flange 91.

[0029] Since the upper end and the lower end of the first oil guide groove are respectively extended toward the upper end and the lower end of the eccentric part, the first oil guide groove can have a relatively large groove cavity to accommodate more lubricating oil, and can guide more lubricating oil to the second oil guide groove; since the second oil guide groove is spiral, during the rotation of the crankshaft, the lubricating oil can flow upward along the second oil guide groove, so that there is enough lubricating oil in the circumferential and axial directions of the eccentric part, ensuring the lubrication effect between the eccentric part and the roller, thereby avoiding or reducing the wear between the eccentric part and the roller.

[0030] The eccentric part is provided with a communication channel; the eccentric part has an upper thrust surface 1011 and a lower thrust surface; the lower thrust surface of the eccentric part is provided with a receiving groove for receiving the rolling part, the first end of the communication channel is connected to the central through hole, and the second end of the communication channel is connected to the receiving groove. When the crankshaft rotates, the eccentric part drives the rolling part to roll; the rolling axis of the rolling part is perpendicular to the central axis of the crankshaft.

[0031] During the rotation of the crankshaft, the lubricating oil in the center through hole flows into the accommodating groove through the connecting channel, so that there is sufficient lubricating oil in the accommodating groove and on the lower thrust surface of the eccentric part, ensuring the smooth rolling of the rolling part in the rolling track groove and the lubrication effect between the eccentric part and the lower flange, thereby avoiding or reducing the wear between the eccentric part and the lower flange.

[0032] The crankshaft assembly of the present application can transport the lubricating oil upward more efficiently, which not only realizes rapid lubrication between the eccentric part and the roller, but also realizes efficient lubrication between the upper / lower flange and the crankshaft, while avoiding or reducing the contact wear between the lower thrust surface of the eccentric part and the lower flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0034] Figure 1 A schematic structural diagram of an embodiment of a crankshaft of a crankshaft assembly according to the present invention is shown;

[0035] Figure 2 A schematic structural diagram of another embodiment of a crankshaft of a crankshaft assembly according to the present invention is shown;

[0036] Figure 3 A schematic structural diagram of another embodiment of a crankshaft of a crankshaft assembly according to the present invention is shown;

[0037] Figure 4 Shows Figure 3 A structural schematic diagram of a crankshaft of a crankshaft assembly from another perspective;

[0038] Figure 5 Shows Figure 4 A cross-sectional view of the crankshaft of the crankshaft assembly at AA;

[0039] Figure 6 Shows Figure 5 An enlarged view of a crankshaft at position I of the crankshaft assembly;

[0040] Figure 7 Shows Figure 4 A cross-sectional view of the crankshaft at BB of the crankshaft assembly;

[0041] Figure 8 Shows Figure 4 A bottom view of a crankshaft of the crankshaft assembly;

[0042] Fig. 9 A schematic structural diagram of a pump assembly of a compressor according to the present invention is shown;

[0043] Fig.10 Shows Fig. 9 An enlarged view of the pump assembly at point P;

[0044] Fig.11 A schematic structural diagram of a lower flange of a compressor according to the present invention is shown;

[0045] Fig.12 Shows Fig.11 A cross-sectional view of the lower flange at CC;

[0046] Fig.13 Shows Fig. 9 Schematic diagram of the structure of the roller of the pump body assembly.

[0047] The above drawings include the following reference numerals:

[0048] 10. crankshaft; 101. eccentric portion; 1011. upper thrust surface; 1012. lower thrust surface; 102. long shaft section; 103. short shaft section; 11. central through hole; 111. blind hole oil plug; 12. oil outlet channel; 13. first oil guide groove; 14. containing groove; 15. connecting channel; 151. first channel section; 152. second channel section;

[0049] 20. roller; 30. second oil guide groove; 40. lower flange; 41. rolling track groove; 50. rolling part;

[0050] 91. Upper flange; 92. Cylinder. DETAILED DESCRIPTION

[0051] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0052] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0053] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0054] The present invention provides a crankshaft assembly, please refer to Figures 1 to 13The crankshaft assembly includes a crankshaft 10 and a roller 20 . The crankshaft 10 includes an eccentric portion 101 . The roller 20 is sleeved on the eccentric portion 101 , so that the crankshaft 10 drives the roller 20 to rotate.

[0055] The crankshaft 10 has a central through hole 11, that is, the central through hole 11 penetrates the crankshaft 10 along the axial direction of the crankshaft 10; an oil outlet channel 12 is provided on the eccentric portion 101, and a first oil guide groove 13 is concavely provided on the outer peripheral surface of the eccentric portion 101, and the upper end and the lower end of the first oil guide groove 13 are respectively extended toward the upper end and the lower end of the eccentric portion 101; the inner end of the oil outlet channel 12 is connected with the central through hole 11, and the outer end of the oil outlet channel 12 extends to the groove bottom wall of the first oil guide groove 13, so that the outer end of the oil outlet channel 12 is connected with the first oil guide groove 13.

[0056] A second oil guide groove 30 in a spiral shape is formed between the outer circumference of the eccentric portion 101 and the inner circumference of the roller 20; the upper end of the second oil guide groove 30 extends to the upper end of the first oil guide groove 13, and the upper end of the second oil guide groove 30 is directly connected to the upper end of the first oil guide groove 13 or not directly connected; the lower end of the second oil guide groove 30 extends to the lower end of the first oil guide groove 13, and the lower end of the second oil guide groove 30 is directly connected to the lower end of the first oil guide groove 13. From the lower end of the second oil guide groove 30, that is, the lower end of the second oil guide groove 30 is taken as the starting end, the spiral direction of the second oil guide groove 30 is opposite to the rotation direction of the crankshaft 10. The lower end of the second oil guide groove 30 is its liquid inlet end. Figure 4 The rotation direction in is the rotation direction of the crankshaft 10.

[0057] Specifically, the upper end of the second oil guiding groove 30 does not penetrate the groove side wall of the upper end of the first oil guiding groove 13, so that the upper end of the second oil guiding groove 30 is not directly connected to the upper end of the first oil guiding groove 13; or, the upper end of the second oil guiding groove 30 penetrates the groove side wall of the upper end of the first oil guiding groove 13, so that the upper end of the second oil guiding groove 30 is directly connected to the upper end of the first oil guiding groove 13. The lower end of the second oil guiding groove 30 penetrates the groove side wall of the lower end of the first oil guiding groove 13, so that the lower end of the second oil guiding groove 30 is directly connected to the lower end of the first oil guiding groove 13.

[0058] During the rotation of the crankshaft 10, the lubricating oil in the compressor oil pool is pumped into the central through hole 11 from the lower end of the central through hole 11; the lubricating oil in the central through hole 11 flows into the first oil guide groove 13 through the oil outlet channel 12, and then flows into the second oil guide groove 30; wherein, the lubricating oil enters the second oil guide groove 30 from the lower end of the second oil guide groove 30. A part of the lubricating oil in the second oil guide groove 30 is immersed in the interface gap between the eccentric part 101 and the roller 20 for lubrication; the other part flows upward along the second oil guide groove 30 to flow to the upper end of the eccentric part 101, and flows between the upper thrust surface 1011 of the eccentric part 101 and the upper flange 91, and between the long shaft section 102 and the upper flange 91; by continuously delivering the lubricating oil to the upper end of the eccentric part 101, the lubricating oil can more efficiently penetrate the fitting gap between the crankshaft 10 and the upper flange 91.

[0059] Since the upper end and the lower end of the first oil guide groove 13 are respectively extended toward the upper end and the lower end of the eccentric portion 101, the first oil guide groove 13 can have a relatively large groove cavity to accommodate more lubricating oil, and can guide more lubricating oil to the second oil guide groove 30; since the second oil guide groove 30 is spiral, during the rotation of the crankshaft 10, the lubricating oil can flow upward along the second oil guide groove 30, so that there is enough lubricating oil in the circumferential and axial directions of the eccentric portion 101, thereby ensuring the lubrication effect between the eccentric portion 101 and the roller 20, thereby avoiding or reducing the wear between the eccentric portion 101 and the roller 20.

[0060] Specifically, the lubricating oil is refrigeration oil.

[0061] The eccentric part 101 is provided with a communication channel 15; the eccentric part 101 has an upper thrust surface 1011 and a lower thrust surface 1012; the lower thrust surface 1012 of the eccentric part 101 is provided with a receiving groove 14 for receiving the rolling part 50, the first end of the communication channel 15 is communicated with the central through hole 11, and the second end of the communication channel 15 is communicated with the receiving groove 14. When the crankshaft 10 rotates, the eccentric part 101 drives the rolling part 50 to roll; the rolling axis of the rolling part 50 is perpendicular to the central axis of the crankshaft 10.

[0062] Specifically, the crankshaft assembly also includes a lower flange 40, which is sleeved on the crankshaft 10, and the crankshaft 10 can rotate relative to the lower flange 40; the upper surface of the lower flange 40 is in contact with or has a gap with the lower thrust surface 1012 of the eccentric portion 101, and the upper surface of the lower flange 40 is its large plane; the upper surface of the lower flange 40 is provided with a ring-shaped rolling track groove 41, and the rolling track groove 41 is arranged around the central axis of the crankshaft 10; the rolling portion 50 is arranged to roll along the rolling track groove 41; that is, when the crankshaft 10 rotates, the rolling portion 50 rolls in the rolling track groove 41 along the rolling track groove 41.

[0063] Specifically, the rolling portion 50 is disposed between the accommodating groove 14 and the rolling track groove 41 , so that the lower thrust surface 1012 of the eccentric portion 101 and the lower flange 40 are in contact with the rolling portion 50 instead of in surface contact.

[0064] During the rotation of the crankshaft 10, the lubricating oil in the center through hole 11 flows into the accommodating groove 14 through the connecting channel 15, so that there is sufficient lubricating oil in the accommodating groove 14 and the lower thrust surface 1012 of the eccentric part 101, ensuring the smooth rolling of the rolling part 50 in the rolling track groove 41 and the lubrication effect between the eccentric part 101 and the lower flange 40, thereby avoiding or reducing the wear between the eccentric part 101 and the lower flange 40.

[0065] It should be noted that when the second oil guide groove 30 transports lubricating oil upward, the lubricating oil will generate a downward force on the second oil guide groove 30, and the downward force will increase the contact friction between the lower thrust surface 1012 of the eccentric portion 101 and the upper surface of the lower flange 40; in order to avoid or reduce the contact friction between the lower thrust surface 1012 of the eccentric portion 101 and the upper surface of the lower flange 40, a matching structure of the accommodating groove 14, the rolling portion 50, and the rolling track groove 41 is set.

[0066] The lubricating oil in the central through hole 11 continuously lubricates the contact surface between the rolling part 50 and the receiving groove 14 through the connecting channel 15. The rolling track groove 41 has an oil retention function, which can provide lubrication for the contact surface between the rolling part 50 and the rolling track groove 41 at the moment of compressor startup and normal operation.

[0067] Optionally, there is one receiving groove 14 and one communicating channel 15. Alternatively, there are multiple receiving grooves 14 and multiple communicating channels 15, and the first ends of the multiple communicating channels 15 are all connected to the central through hole 11; the multiple receiving grooves 14 and the multiple communicating channels 15 are arranged one by one, and the second end of each communicating channel 15 is connected to the corresponding receiving groove 14. A rolling portion 50 is arranged in each receiving groove 14.

[0068] Optionally, a plurality of accommodating grooves 14 are distributed along the circumference of the eccentric portion 101 .

[0069] In the present application, the crankshaft 10 also includes a coaxially arranged long shaft section 102 and a short shaft section 103, the long shaft section 102 is connected to the upper end of the eccentric portion 101, and the short shaft section 103 is connected to the lower end of the eccentric portion 101; the central axis of the eccentric portion 101 is parallel to the central axis of the long shaft section 102; the lower flange 40 is sleeved on the short shaft section 103, and the upper flange 91 is sleeved on the long shaft section 102.

[0070] In the present application, the rolling portion 50 is a spherical structure, that is, the rolling portion 50 is a ball.

[0071] Optionally, the rolling portion 50 is made of high carbon chromium steel.

[0072] Specifically, the rolling portion 50 is clamped in the receiving groove 14 , and the rolling portion 50 is rotatably arranged relative to the groove wall of the receiving groove 14 .

[0073] In the present application, the connecting channel 15 includes a first channel section 151 and a second channel section 152, the first end of the first channel section 151 is the first end of the connecting channel 15, the second end of the first channel section 151 is connected to the first end of the second channel section 152, and the second end of the second channel section 152 is the second end of the connecting channel 15; the first channel section 151 and the second channel section 152 are arranged at an angle.

[0074] Optionally, the first channel section 151 and the second channel section 152 are perpendicular to each other; the extension direction of the first channel section 151 is perpendicular to the axial direction of the crankshaft 10 , and the extension direction of the second channel section 152 is parallel to the axial direction of the crankshaft 10 .

[0075] In the present application, optionally, the oil outlet passage 12 is perpendicular to the axial direction of the crankshaft 10 .

[0076] In the present application, the first oil guiding groove 13 is a strip-shaped groove.

[0077] Optionally, the first oil guiding groove 13 is arranged to extend along the axial direction of the eccentric portion 101 .

[0078] Specifically, the upper end of the first oil guide groove 13 is located at the upper end of the eccentric portion 101 ; the lower end of the first oil guide groove 13 is located at the lower end of the eccentric portion 101 ; in this way, sufficient lubricating oil can be ensured in the axial direction of the eccentric portion 101 .

[0079] In the present application, there is at least one oil outlet channel 12 .

[0080] like Figure 1 , Figure 3 , Figure 4 As shown, when there is one oil outlet channel 12 , the outer end of the oil outlet channel 12 is located between the upper end and the lower end of the first oil guide groove 13 , or the outer end of the oil outlet channel 12 is located at the lower end of the first oil guide groove 13 .

[0081] like Figure 2 As shown, when there are multiple oil outlet channels 12, the outer end of one of the multiple oil outlet channels 12 is located between the upper end and the lower end of the first oil guide groove 13, and the outer end of another oil outlet channel 12 is located at the lower end of the first oil guide groove 13.

[0082] Optionally, when there is only one oil outlet channel 12 , the outer end of the oil outlet channel 12 is located at a middle position between the upper end and the lower end of the first oil guiding groove 13 .

[0083] Optionally, when there are multiple oil outlet channels 12, the outer end of one of the multiple oil outlet channels 12 is located at the middle position between the upper end and the lower end of the first oil guiding groove 13.

[0084] In the present application, the second oil guiding groove 30 is arranged on the outer peripheral surface of the eccentric part 101 or the inner peripheral surface of the roller 20.

[0085] In the present application, optionally, the value range of the groove depth of the second oil guiding groove 30 is greater than or equal to 0.2 mm and less than or equal to 1 mm; the groove depth of the second oil guiding groove 30 refers to the depth from its groove opening to the groove bottom. Since the second oil guiding groove 30 penetrates through the high-pressure area and the low-pressure area of the oil film, while maximizing the conveying capacity of the second oil guiding groove 30 for the lubricating oil, the influence on the load-carrying capacity of the oil film should be minimized as much as possible.

[0086] In the present application, optionally, the shape of the cross-section of the second oil guiding groove 30 perpendicular to its extending direction is a polygon or an arc. For example, the shape of the cross-section of the second oil guiding groove 30 perpendicular to its extending direction is a V shape or a rectangle.

[0087] In the present application, optionally, the shape of the cross-section of the oil outlet channel 12 perpendicular to its extending direction is a circle, or an ellipse, or a polygon. For example, the shape of the cross-section of the oil outlet channel 12 perpendicular to its extending direction is a rectangle.

[0088] In the present application, optionally, the diameter of the eccentric part 101 is Φ2, the width of the second oil guiding groove 30 along the radial direction of the eccentric part 101 is D, and 0.01 ≤ D / Φ2 ≤ 0.05.

[0089] In the present application, optionally, the axial height of the eccentric part 101 is X, the width of the second oil guiding groove 30 along the axial direction of the eccentric part 101 is L, the axial height of the contact surface between the eccentric part 101 and the roller 20 is H, and the diameter or equivalent diameter of the oil outlet channel 12 is Φ1, and 0.3Φ1 ≤ L ≤ 0.15H; H < X. Such a design is beneficial to the upward conveyance of the lubricating oil in the second oil guiding groove 30, while avoiding a significant reduction in the load-carrying capacity of the oil film.

[0090] In the present application, optionally, the rolling part 50 is a spherical structure; the groove wall surface of the accommodating groove 14 matches and fits with the outer wall surface of the rolling part 50, so that the rolling part 50 is stuck in the accommodating groove 14, and the rolling part 50 is rotatably arranged relative to the groove wall of the accommodating groove 14; the groove wall surface of the accommodating groove 14 is a part of a preset spherical surface; the radius of the preset spherical surface is R2. The diameter or equivalent diameter of the communication channel 15 is Φ3, and the diameter or equivalent diameter of the oil outlet channel 12 is Φ1, and 0.3Φ1 ≤ Φ3 ≤ 0.6Φ1, and 0.7Φ3 ≤ R2 ≤ Φ3.

[0091] In the present application, optionally, the diameter of the rolling portion 50 is Φ4; 1.98R2≤Φ4<2R2.

[0092] In the present application, optionally, the groove side wall of the rolling track groove 41 in a cross section perpendicular to its extension direction is arc-shaped and has a radius of R1, where the arc is a preset arc; the groove side wall of the rolling track groove 41 matches and fits with the outer wall surface of the rolling part 50, and the rolling part 50 is rollably arranged along the rolling track groove 41; R1=R2.

[0093] Optionally, a cross section of the rolling track groove 41 perpendicular to its extension direction is a part of a preset circle, and the preset circle includes a preset arc; the radius of the preset circle is R1.

[0094] In the present application, optionally, when the crankshaft 10 is in a stationary state, the axial height of the gap between the lower thrust surface 1012 of the eccentric portion 101 and the lower flange 40 is S; the axial height of the eccentric portion 101 is X, and the axial height of the roller 20 is Y; 0.3*(YX)≤S≤0.6*(YX); H≤Y <X。

[0095] In the present application, a blind hole oil plug 111 is provided at the upper end of the central through hole 11 .

[0096] Optionally, an oil guide sheet is disposed in the central through hole 11 .

[0097] The present invention also provides a compressor, which comprises the above-mentioned crankshaft assembly.

[0098] Specifically, the compressor includes a pump body assembly, which includes the crankshaft assembly mentioned above; the pump body assembly also includes an upper flange 91 and a cylinder 92 .

[0099] Specifically, the compressor is a rotary compressor.

[0100] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0101] In the crankshaft assembly provided by the present invention, the crankshaft assembly includes a crankshaft 10 and a roller 20 . The crankshaft 10 includes an eccentric portion 101 . The roller 20 is sleeved on the eccentric portion 101 , so that the crankshaft 10 drives the roller 20 to rotate.

[0102] The crankshaft 10 has a central through hole 11, and a first oil guide groove 13 is concavely provided on the outer peripheral surface of the eccentric portion 101, and the upper end and the lower end of the first oil guide groove 13 are respectively extended toward the upper end and the lower end of the eccentric portion 101; the inner end of the oil outlet channel 12 is connected to the central through hole 11, and the outer end of the oil outlet channel 12 extends to the groove bottom wall of the first oil guide groove 13, so that the outer end of the oil outlet channel 12 is connected to the first oil guide groove 13.

[0103] A second oil guide groove 30 in a spiral shape is formed between the outer circumference of the eccentric portion 101 and the inner circumference of the roller 20; the upper end of the second oil guide groove 30 extends to the upper end of the first oil guide groove 13, and the upper end of the second oil guide groove 30 is directly connected to the upper end of the first oil guide groove 13 or not directly connected; the lower end of the second oil guide groove 30 extends to the lower end of the first oil guide groove 13, and the lower end of the second oil guide groove 30 is directly connected to the lower end of the first oil guide groove 13. From the lower end of the second oil guide groove 30, that is, the lower end of the second oil guide groove 30 is taken as the starting end, the spiral direction of the second oil guide groove 30 is opposite to the rotation direction of the crankshaft 10. The lower end of the second oil guide groove 30 is its liquid inlet end.

[0104] During the rotation of the crankshaft 10, the lubricating oil in the compressor oil pool is pumped into the central through hole 11 from the lower end of the central through hole 11; the lubricating oil in the central through hole 11 flows into the first oil guide groove 13 through the oil outlet channel 12, and then flows into the second oil guide groove 30; wherein, the lubricating oil enters the second oil guide groove 30 from the lower end of the second oil guide groove 30. A part of the lubricating oil in the second oil guide groove 30 is immersed in the interface gap between the eccentric part 101 and the roller 20 for lubrication; the other part flows upward along the second oil guide groove 30 to flow to the upper end of the eccentric part 101, and flows between the upper thrust surface 1011 of the eccentric part 101 and the upper flange 91, and between the long shaft section 102 and the upper flange 91; by continuously delivering the lubricating oil to the upper end of the eccentric part 101, the lubricating oil can more efficiently penetrate the fitting gap between the crankshaft 10 and the upper flange 91.

[0105] Since the upper end and the lower end of the first oil guide groove 13 are respectively extended toward the upper end and the lower end of the eccentric portion 101, the first oil guide groove 13 can have a relatively large groove cavity to accommodate more lubricating oil, and can guide more lubricating oil to the second oil guide groove 30; since the second oil guide groove 30 is spiral, during the rotation of the crankshaft 10, the lubricating oil can flow upward along the second oil guide groove 30, so that there is enough lubricating oil in the circumferential and axial directions of the eccentric portion 101, thereby ensuring the lubrication effect between the eccentric portion 101 and the roller 20, thereby avoiding or reducing the wear between the eccentric portion 101 and the roller 20.

[0106] The eccentric part 101 is provided with a communication channel 15; the eccentric part 101 has an upper thrust surface 1011 and a lower thrust surface 1012; the lower thrust surface 1012 of the eccentric part 101 is provided with a receiving groove 14 for receiving the rolling part 50, the first end of the communication channel 15 is communicated with the central through hole 11, and the second end of the communication channel 15 is communicated with the receiving groove 14. When the crankshaft 10 rotates, the eccentric part 101 drives the rolling part 50 to roll; the rolling axis of the rolling part 50 is perpendicular to the central axis of the crankshaft 10.

[0107] During the rotation of the crankshaft 10, the lubricating oil in the center through hole 11 flows into the accommodating groove 14 through the connecting channel 15, so that there is sufficient lubricating oil in the accommodating groove 14 and the lower thrust surface 1012 of the eccentric part 101, ensuring the smooth rolling of the rolling part 50 in the rolling track groove 41 and the lubrication effect between the eccentric part 101 and the lower flange 40, thereby avoiding or reducing the wear between the eccentric part 101 and the lower flange 40.

[0108] The crankshaft assembly of the present application can transport the lubricating oil upward more efficiently, which not only realizes rapid lubrication between the eccentric portion 101 and the roller 20, but also realizes efficient lubrication between the upper / lower flange and the crankshaft 10, while avoiding or reducing the contact wear between the lower thrust surface 1012 of the eccentric portion 101 and the lower flange 40.

[0109] The crankshaft assembly of the present application solves the following problems: 1. The problem that parts are easily subject to contact friction when the compressor is started; 2. The problem that the lubrication effect of the compressor is poor when it is operated at a low frequency; 3. The problem that the lower thrust surface and the lower flange of the crankshaft are easily subject to wear.

[0110] The crankshaft assembly of the present application: 1. The first oil guide groove 13 and the second oil guide groove 30 both have a certain oil retention capacity, so that the eccentric part 101 and the roller 20 can be supplied with oil in advance at the moment of compressor startup; 2. When the compressor is running, the second oil guide groove 30 can quickly and efficiently transport the lubricating oil from the bottom to various parts of the parts; 3. By setting a blind hole oil plug 111, the oil discharge rate can be reduced, and the cost is lower than that of the blind hole crankshaft; 4. When the outer end of the oil outlet channel 12 is located at the lower end of the first oil guide groove 13, the outer end of the oil outlet channel 12 is located at the rotation starting point of the second oil guide groove 30, and the lubricating oil can be quickly pumped from bottom to top into various parts under low-frequency conditions; 5. The lower thrust surface 1012 of the eccentric part 101 is not in direct contact with the lower flange 40, but is in sliding contact through the rolling part 50, which can effectively avoid the problem of wear between the crankshaft 10 and the lower flange 40.

[0111] The crankshaft assembly of the present application can quickly pump lubricating oil from the lower end to various parts of the upper end, which can not only avoid wear between the crankshaft 10 and the roller 20 and the lower flange 40, but also avoid wear between the crankshaft 10 and the upper flange 91.

[0112] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0113] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0114] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A crankshaft assembly, comprising a crankshaft (10) and a roller (20), wherein the crankshaft (10) has a central through hole (11) and comprises an eccentric portion (101); the roller (20) is sleeved on the eccentric portion (101); and the roller (20) is characterized in that: The eccentric part (101) is provided with an oil outlet passage (12) and a communication passage (15); the outer peripheral surface of the eccentric part (101) is concavely provided with a first oil guide groove (13), and the upper end and the lower end of the first oil guide groove (13) are respectively extended toward the upper end and the lower end of the eccentric part (101); the inner end of the oil outlet passage (12) is communicated with the central through hole (11), and the outer end of the oil outlet passage (12) extends to the bottom wall of the first oil guide groove (13); A second oil guide groove (30) in a spiral shape is formed between the outer circumferential surface of the eccentric portion (101) and the inner circumferential surface of the roller (20); the upper end of the second oil guide groove (30) extends to the upper end of the first oil guide groove (13), and the upper end of the second oil guide groove (30) is directly connected to or not directly connected to the upper end of the first oil guide groove (13); the lower end of the second oil guide groove (30) extends to the lower end of the first oil guide groove (13) and is connected to the lower end of the first oil guide groove (13); from the lower end of the second oil guide groove (30), the spiral direction of the second oil guide groove (30) is opposite to the rotation direction of the crankshaft (10); A receiving groove (14) for receiving the rolling portion (50) is provided on the lower thrust surface (1012) of the eccentric portion (101); a first end of the connecting channel (15) is connected to the central through hole (11); a second end of the connecting channel (15) is connected to the receiving groove (14); when the crankshaft (10) rotates, the rolling portion (50) is driven to roll, and the rolling axis of the rolling portion (50) is perpendicular to the central axis of the crankshaft (10).

2. The crankshaft assembly according to claim 1, characterized in that The crankshaft assembly also includes: A lower flange (40) is sleeved on the crankshaft (10); the upper surface of the lower flange (40) is in contact with or has a gap with the lower thrust surface (1012) of the eccentric portion (101); the upper surface of the lower flange (40) is provided with an annular rolling track groove (41), and the rolling portion (50) is arranged to roll along the rolling track groove (41).

3. The crankshaft assembly according to claim 1 or 2, characterized in that: The receiving groove (14) and the communicating channel (15) are both one or more, and the multiple receiving grooves (14) and the multiple communicating channels (15) are arranged in a one-to-one correspondence; each receiving groove (14) is provided with a rolling portion (50); and / or The rolling part (50) is a spherical structure.

4. The crankshaft assembly according to claim 1, characterized in that The second oil guide groove (30) is arranged on the outer peripheral surface of the eccentric portion (101) or the inner peripheral surface of the roller (20); and / or The groove depth of the second oil guide groove (30) is in the range of greater than or equal to 0.2 mm and less than or equal to 1 mm.

5. The crankshaft assembly according to claim 1, characterized in that The first oil guide groove (13) is a strip-shaped groove; and / or The upper end of the first oil guide groove (13) is located at the upper end of the eccentric portion (101); and / or The lower end of the first oil guide groove (13) is located at the lower end of the eccentric portion (101); and / or The first oil guide groove (13) is arranged to extend along the axial direction of the eccentric portion (101).

6. The crankshaft assembly according to claim 1 or 5, characterized in that: There is one oil outlet channel (12), and the outer end of the oil outlet channel (12) is located between the upper end and the lower end of the first oil guide groove (13) or at the lower end of the first oil guide groove (13); or There are a plurality of oil outlet channels (12), the outer end of one of the plurality of oil outlet channels (12) being located between the upper end and the lower end of the first oil guide groove (13), and the outer end of another of the plurality of oil outlet channels (12) being located at the lower end of the first oil guide groove (13).

7. The crankshaft assembly according to claim 1, characterized in that The diameter of the eccentric portion (101) is Φ2, the width of the second oil guide groove (30) along the radial direction of the eccentric portion (101) is D, 0.01≤D / Φ2≤0.05; and / or The axial height of the eccentric portion (101) is X, the axial width of the second oil guide groove (30) along the eccentric portion (101) is L, the axial height of the contact surface between the eccentric portion (101) and the roller (20) is H, the diameter or equivalent diameter of the oil outlet channel (12) is Φ1, 0.3Φ1≤L≤0.15H; H <X。 8. The crankshaft assembly according to claim 2, characterized in that The rolling portion (50) is a spherical structure, the groove wall surface of the receiving groove (14) matches and fits with the outer wall surface of the rolling portion (50), and the groove wall surface of the receiving groove (14) is a part of a preset spherical surface; the radius of the preset spherical surface is R2; The diameter or equivalent diameter of the communication channel (15) is Φ3, the diameter or equivalent diameter of the oil outlet channel (12) is Φ1, 0.3Φ1≤Φ3≤0.6Φ1, 0.7Φ3≤R2≤Φ3; and / or The diameter of the rolling part (50) is Φ4; 1.98R2≤Φ4<2R2; and / or The groove side wall of the rolling track groove (41) in a cross section perpendicular to its extension direction is arc-shaped and has a radius of R1. The groove side wall of the rolling track groove (41) matches and fits with the outer wall surface of the rolling portion (50), and R1 = R2.

9. The crankshaft assembly according to claim 2, characterized in that: When the crankshaft (10) is in a stationary state, the axial height of the gap between the lower thrust surface (1012) of the eccentric portion (101) and the lower flange (40) is S; The axial height of the eccentric portion (101) is X, and the axial height of the roller (20) is Y; 0.3*(YX)≤S≤0.6*(YX).

10. The crankshaft assembly according to claim 1, characterized in that A blind hole oil plug (111) is provided at the upper end of the central through hole (11).

11. A compressor, characterized in that: A crankshaft assembly comprising any one of claims 1 to 10.

Images