Crankshaft assembly, air cylinder mechanism and compressor

Abstract

The utility model provides a crankshaft assembly, a cylinder mechanism and a compressor. The crankshaft assembly comprises a crankshaft, a rolling assembly and an eccentric ring, the crankshaft comprises a main shaft section and an eccentric shaft section; the central axis of the main shaft section is parallel to the central axis of the eccentric shaft section; the eccentric ring sleeves the outer side of the eccentric shaft section, and the central axis of the eccentric ring coincides with the central axis of the eccentric shaft section; the rolling assembly is arranged between the inner circumferential wall of the eccentric ring and the outer circumferential wall of the eccentric shaft section so that the eccentric shaft section and the eccentric ring can be arranged in a relative rotation mode. The central axis of the main shaft section coincides with the central axis of the cylinder cavity. The crankshaft is rotatably arranged around the central axis of the main shaft section, the outer peripheral wall of the eccentric ring is kept in internally tangent contact with the inner peripheral wall of the cylinder cavity, and the outer peripheral wall of the eccentric ring is kept in contact with the free end of the sliding part, so that the cylinder cavity is divided into a compression cavity and an air suction cavity. According to the crankshaft assembly, the friction loss between the eccentric ring and the eccentric shaft section is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, and more specifically, to a crankshaft assembly, a cylinder mechanism and a compressor. Background Art

[0002] As Figure 1 shown, in the existing compressor, the pump body assembly includes an upper flange 1, a lower flange 2, a crankshaft 3, a roller 4, a cylinder 5, and a sliding vane 6. The roller 4 is sleeved on the eccentric part of the crankshaft 3, and the roller 4 rotates inside the cylinder 5 to perform suction and exhaust. Since the material of the roller 4 is harder than that of the crankshaft 3, during the operation of the compressor, the inner peripheral wall of the roller 4 often rubs against the outer peripheral wall of the eccentric part of the crankshaft 3, resulting in increased power of the compressor, and when the wear is serious, the compressor may be stuck and fail. Summary of the Utility Model

[0003] The main purpose of the utility model is to provide a crankshaft assembly, a cylinder mechanism and a compressor to solve the problem of frictional loss between the roller and the eccentric part of the crankshaft in the existing compressor.

[0004] To achieve the above object, according to one aspect of the utility model, a crankshaft assembly is provided, which is used to be arranged in the cylinder cavity of a cylinder. A sliding member is arranged on the cylinder and is telescopically arranged along the radial direction of the cylinder, and the free end of the sliding member extends into the cylinder cavity. The crankshaft assembly includes: a crankshaft, which includes a main shaft section and an eccentric shaft section, and the main shaft section and the eccentric shaft section are distributed along the axial direction of the crankshaft and are connected; the central axis of the main shaft section is parallel to the central axis of the eccentric shaft section; a rolling assembly and an eccentric ring, the eccentric ring is sleeved on the outside of the eccentric shaft section, and the central axis of the eccentric ring coincides with the central axis of the eccentric shaft section; the rolling assembly is arranged between the inner peripheral wall of the eccentric ring and the outer peripheral wall of the eccentric shaft section so that the eccentric shaft section and the eccentric ring can be relatively rotatably arranged; wherein, the central axis of the main shaft section coincides with the central axis of the cylinder cavity, the diameter of the eccentric ring is smaller than the diameter of the cylinder cavity; the crankshaft is rotatably arranged around the central axis of the main shaft section, the outer peripheral wall of the eccentric ring is in internal tangency contact with the inner peripheral wall of the cylinder cavity, and the outer peripheral wall of the eccentric ring is in contact with the free end of the sliding member to divide the cylinder cavity into a compression cavity and a suction cavity.

[0005] Furthermore, the rolling assembly includes at least one rolling unit distributed along the axial direction of the eccentric ring, and each rolling unit includes a plurality of rolling parts, and the plurality of rolling parts of the rolling unit are distributed along the circumferential direction of the eccentric ring.

[0006] Furthermore, the rolling part is a ball; or, the rolling part is a roller, and the central axis of the rolling part is parallel to the central axis of the eccentric ring.

[0007] Furthermore, the diameters of all the rolling parts of the rolling assembly are equal.

[0008] Furthermore, the axial height of the eccentric shaft section is equal to the axial height of the eccentric ring.

[0009] Furthermore, there are two main shaft sections, and the two main shaft sections are respectively connected to both ends of the eccentric shaft section; the axial length of one main shaft section is greater than the axial length of the other main shaft section.

[0010] Furthermore, the crankshaft is an integrally formed structure.

[0011] According to another aspect of the present utility model, a cylinder mechanism is provided, which includes a cylinder, a sliding member, and the above-mentioned crankshaft assembly.

[0012] According to still another aspect of the present utility model, a compressor is provided, which includes the above-mentioned cylinder mechanism.

[0013] Furthermore, the compressor is a rolling rotor type compressor.

[0014] Applying the technical solution of the present utility model, the crankshaft assembly includes a crankshaft, a rolling assembly, and an eccentric ring; the crankshaft includes a main shaft section and an eccentric shaft section, and the main shaft section and the eccentric shaft section are distributed along the axial direction of the crankshaft and are connected; the central axis of the main shaft section is parallel to the central axis of the eccentric shaft section.

[0015] The eccentric ring is sleeved outside the eccentric shaft section, the central axis of the eccentric ring coincides with the central axis of the eccentric shaft section, and the rolling assembly is arranged between the inner peripheral wall of the eccentric ring and the outer peripheral wall of the eccentric shaft section, so that the eccentric shaft section and the eccentric ring are relatively rotatably arranged.

[0016] The crankshaft assembly is used to be arranged in the cylinder cavity of the cylinder, the central axis of the main shaft section coincides with the central axis of the cylinder cavity, and the diameter of the eccentric ring is smaller than the diameter of the cylinder cavity; a sliding member that is telescopically arranged along the radial direction of the cylinder is arranged on the cylinder, and the free end of the sliding member extends into the cylinder cavity.

[0017] The crankshaft is rotatably arranged around the central axis of the main shaft section, the outer peripheral wall of the eccentric ring keeps an inscribed contact with the inner peripheral wall of the cylinder cavity, and the outer peripheral wall of the eccentric ring keeps in contact with the free end of the sliding member, so as to divide the cylinder cavity into a compression cavity and a suction cavity that are circumferentially distributed along the cylinder cavity through the crankshaft assembly and the sliding member.

[0018] During the rotation of the crankshaft around the central axis of the main shaft section, the eccentric shaft section can drive the eccentric ring to rotate around the central axis of the main shaft section, and the eccentric shaft section and the eccentric ring can rotate relative to each other; in this way, the sliding friction between the traditional roller and the eccentric part of the crankshaft can be improved to the rolling friction between the eccentric ring and the eccentric shaft section. The rolling component can play a role in reducing friction, reducing the friction loss between the eccentric ring and the eccentric shaft section, making the crankshaft assembly of the present application a low-loss crankshaft assembly, which is beneficial to reducing the power consumption of the compressor, improving the energy efficiency of the compressor, and avoiding or reducing the phenomenon that the compressor is stuck and fails due to severe wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The schematic diagrams in the specification drawings that form a part of the present application are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0020] Figure 1 shows a schematic structural diagram of a pump body assembly of an existing compressor;

[0021] Figure 2 shows a schematic structural diagram of an embodiment of a crankshaft assembly according to the present utility model;

[0022] Figure 3 shows a longitudinal sectional view of a cylinder mechanism of a compressor according to the present utility model;

[0023] Figure 4 shows a schematic structural diagram of a cylinder mechanism of a compressor according to the present utility model;

[0024] Figures 5 to 7 shows a schematic diagram of the air flow during the suction and compression processes of a cylinder mechanism of a compressor according to the present utility model.

[0025] Among them, the above-mentioned drawings include the following reference numerals:

[0026] 1, upper flange; 2, lower flange; 3, crankshaft; 4, roller; 5, cylinder; 6, sliding vane;

[0027] 100, crankshaft assembly; 10, crankshaft; 11, main shaft section; 111, long main shaft section; 112, short main shaft section; 12, eccentric shaft section; 20, rolling component; 21, rolling part; 30, eccentric ring;

[0028] 90, cylinder cavity; 901, compression cavity; 902, suction cavity; 903, cylinder; 91, sliding part; 92, upper flange; 93, lower flange. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The following will describe the present utility model in detail with reference to the accompanying drawings and in combination with the embodiments.

[0030] It should be pointed out that the following detailed description is exemplary and is intended to provide further illustration of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0031] 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 "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] The present utility model provides a crankshaft assembly 100. Please refer to Figures 2 to 7 , the crankshaft assembly 100 includes a crankshaft 10, a rolling assembly 20, and an eccentric ring 30; the crankshaft 10 includes a main shaft section 11 and an eccentric shaft section 12, and the main shaft section 11 and the eccentric shaft section 12 are distributed along the axial direction of the crankshaft 10 and are connected; the central axis of the main shaft section 11 is parallel to the central axis of the eccentric shaft section 12.

[0033] The eccentric ring 30 is sleeved outside the eccentric shaft section 12, the central axis of the eccentric ring 30 coincides with the central axis of the eccentric shaft section 12, and the rolling assembly 20 is arranged between the inner peripheral wall of the eccentric ring 30 and the outer peripheral wall of the eccentric shaft section 12, so that the eccentric shaft section 12 and the eccentric ring 30 are relatively rotatably arranged.

[0034] The crankshaft assembly 100 is used to be arranged in the cylinder cavity 90 of the cylinder 903, the central axis of the main shaft section 11 coincides with the central axis of the cylinder cavity 90, and the diameter of the eccentric ring 30 is smaller than the diameter of the cylinder cavity 90; a sliding member 91 that is axially telescopically arranged along the cylinder 903 is arranged on the cylinder 903, and the free end of the sliding member 91 extends into the cylinder cavity 90.

[0035] The crankshaft 10 is rotatably arranged around the central axis of the main shaft section 11, the outer peripheral wall of the eccentric ring 30 is in internal tangential contact with the inner peripheral wall of the cylinder cavity 90, and the outer peripheral wall of the eccentric ring 30 is in contact with the free end of the sliding member 91, so as to divide the cylinder cavity 90 into a compression cavity 901 and a suction cavity 902 that are circumferentially distributed along the cylinder cavity 90 through the crankshaft assembly 100 and the sliding member 91.

[0036] During the rotation of the crankshaft 10 about the central axis of the main shaft section 11, the eccentric shaft section 12 can drive the eccentric ring 30 to rotate about the central axis of the main shaft section 11, and the eccentric shaft section 12 and the eccentric ring 30 can rotate relative to each other; in this way, the sliding friction between the traditional roller 4 and the eccentric part of the crankshaft 3 can be improved to the rolling friction between the eccentric ring 30 and the eccentric shaft section 12, and the rolling assembly 20 can play a role in reducing friction, reducing the friction loss between the eccentric ring 30 and the eccentric shaft section 12, making the crankshaft assembly 100 of the present application a low-loss crankshaft assembly, which is beneficial to reducing the power consumption of the compressor, improving the energy efficiency of the compressor, and avoiding or reducing the phenomenon that the compressor is stuck and fails due to severe wear.

[0037] Specifically, the axial height of the eccentric shaft section 12 is equal to the axial height of the eccentric ring 30, and the axial height of the eccentric ring 30 is equal to the axial height of the cylinder cavity 90, that is, the axial height of the eccentric shaft section 12 is equal to the axial height of the cylinder cavity 90.

[0038] Specifically, the sliding member 91 is a sliding vane.

[0039] Specifically, the cylinder 903 is provided with a chute, and the sliding member 91 is telescopically arranged in the chute; along the radial direction of the cylinder 903, the sliding member 91 has a connecting end and a free end arranged oppositely; an elastic member is arranged between the connecting end of the sliding member 91 and the groove wall of the chute to enable the sliding member 91 to be telescopically arranged.

[0040] In this embodiment, there are two main shaft sections 11; along the axial direction of the crankshaft 10, the two main shaft sections 11 are respectively connected to both ends of the eccentric shaft section 12; that is, along the axial direction of the crankshaft 10, the crankshaft 10 includes a main shaft section 11, an eccentric shaft section 12, and another main shaft section 11 connected in sequence.

[0041] Specifically, the two main shaft sections 11 are respectively a long main shaft section 111 and a short main shaft section 112, and the axial length of the long main shaft section 111 is greater than the axial length of the short main shaft section 112.

[0042] Specifically, the crankshaft 10 is an integrally formed structure.

[0043] In this embodiment, the rolling assembly 20 includes at least one rolling unit distributed along the axial direction of the eccentric ring 30, and each rolling unit includes a plurality of rolling parts 21, and the plurality of rolling parts 21 of the rolling unit are distributed along the circumferential direction of the eccentric ring 30.

[0044] Optionally, the rolling part 21 is a ball or a roller.

[0045] When the rolling part 21 is a roller, the central axis of the rolling part 21 is parallel to the central axis of the eccentric ring 30, that is, the cylindrical surface of the roller contacts both the inner peripheral wall of the eccentric ring 30 and the outer peripheral wall of the eccentric shaft section 12.

[0046] When the rolling part 21 is a ball, the spherical surface of the ball contacts both the inner peripheral wall of the eccentric ring 30 and the outer peripheral wall of the eccentric shaft section 12.

[0047] In this embodiment, the diameters of each rolling part 21 of the rolling assembly 20 are equal.

[0048] The present utility model further provides a cylinder mechanism, which includes a cylinder 903, a sliding member 91, and the above-mentioned crankshaft assembly 100.

[0049] Specifically, the cylinder mechanism further includes an upper flange 92 and a lower flange 93, and the upper flange 92 and the lower flange 93 are respectively arranged at the upper end and the lower end of the cylinder 903.

[0050] Specifically, the long main shaft section 111 and the short main shaft section 112 are respectively rotatably passed through the upper flange 92 and the lower flange 93.

[0051] The present utility model further provides a compressor, which includes the above-mentioned cylinder mechanism.

[0052] Specifically, the compressor is a rolling rotor type compressor.

[0053] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

[0054] In the crankshaft assembly 100 provided by the present utility model, the crankshaft assembly 100 includes a crankshaft 10, a rolling assembly 20, and an eccentric ring 30; the crankshaft 10 includes a main shaft section 11 and an eccentric shaft section 12, and the main shaft section 11 and the eccentric shaft section 12 are distributed along the axial direction of the crankshaft 10 and are connected; the central axis of the main shaft section 11 is parallel to the central axis of the eccentric shaft section 12.

[0055] The eccentric ring 30 is sleeved outside the eccentric shaft section 12, the central axis of the eccentric ring 30 coincides with the central axis of the eccentric shaft section 12, and the rolling assembly 20 is arranged between the inner peripheral wall of the eccentric ring 30 and the outer peripheral wall of the eccentric shaft section 12, so that the eccentric shaft section 12 and the eccentric ring 30 are relatively rotatably arranged.

[0056] The crankshaft assembly 100 is used to be arranged in the cylinder cavity 90 of the cylinder, the central axis of the main shaft section 11 coincides with the central axis of the cylinder cavity 90, the diameter of the eccentric ring 30 is smaller than the diameter of the cylinder cavity 90; a sliding member 91 that is radially telescopically arranged along the cylinder 903 is arranged on the cylinder 903, and the free end of the sliding member 91 extends into the cylinder cavity 90.

[0057] The crankshaft 10 is rotatably arranged about the central axis of the main shaft section 11. The outer peripheral wall of the eccentric ring 30 is in internal tangency contact with the inner peripheral wall of the cylinder cavity 90, and the outer peripheral wall of the eccentric ring 30 is in contact with the free end of the slider 91, so as to divide the cylinder cavity 90 into a compression cavity 901 and a suction cavity 902 which are circumferentially distributed along the cylinder cavity 90 through the crankshaft assembly 100 and the slider 91.

[0058] During the rotation of the crankshaft 10 about the central axis of the main shaft section 11, the eccentric shaft section 12 can drive the eccentric ring 30 to rotate about the central axis of the main shaft section 11, and the eccentric shaft section 12 and the eccentric ring 30 can rotate relative to each other; in this way, the sliding friction between the traditional roller 4 and the eccentric part of the crankshaft 3 can be improved to the rolling friction between the eccentric ring 30 and the eccentric shaft section 12, and the rolling assembly 20 can play a role in reducing friction, reducing the friction loss between the eccentric ring 30 and the eccentric shaft section 12, making the crankshaft assembly 100 of the present application a low-loss crankshaft assembly, which is beneficial to reducing the power consumption of the compressor, improving the energy efficiency of the compressor, and avoiding or reducing the phenomenon that the compressor is stuck and fails due to serious wear.

[0059] It should be noted that the terms "first", "second", etc. in the specification, claims and above-mentioned drawings of the present application are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances, so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0060] For the sake of description, spatial relative terms such as "above...", "above...", "on the upper surface of...", "above" etc. can be used here to describe the spatial position relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the figure. For example, if the device in the figure 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" afterwards. Thus, the exemplary term "above..." can include both orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding explanations are made for the spatial relative descriptions used here.

[0061] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A crankshaft assembly, used to be arranged in a cylinder cavity (90) of a cylinder, wherein the cylinder is provided with a sliding member (91) which is telescopically arranged along the radial direction of the cylinder, and the free end of the sliding member (91) extends into the cylinder cavity (90); characterized in that: The crankshaft assembly comprises: A crankshaft (10), the crankshaft (10) comprising a main shaft section (11) and an eccentric shaft section (12), the main shaft section (11) and the eccentric shaft section (12) being distributed and connected along the axial direction of the crankshaft (10); the central axis of the main shaft section (11) is parallel to the central axis of the eccentric shaft section (12); A rolling assembly (20) and an eccentric ring (30), wherein the eccentric ring (30) is sleeved on the outside of the eccentric shaft segment (12), and the central axis of the eccentric ring (30) coincides with the central axis of the eccentric shaft segment (12); the rolling assembly (20) is arranged between the inner peripheral wall of the eccentric ring (30) and the outer peripheral wall of the eccentric shaft segment (12), so that the eccentric shaft segment (12) and the eccentric ring (30) can be relatively rotatably arranged; The central axis of the main shaft section (11) coincides with the central axis of the cylinder chamber (90), and the diameter of the eccentric ring (30) is smaller than the diameter of the cylinder chamber (90); the crankshaft (10) is rotatably arranged around the central axis of the main shaft section (11), the outer peripheral wall of the eccentric ring (30) maintains inward contact with the inner peripheral wall of the cylinder chamber (90), and the outer peripheral wall of the eccentric ring (30) maintains contact with the free end of the sliding member (91) to divide the cylinder chamber (90) into a compression chamber (901) and an intake chamber (902).

2. The crankshaft assembly according to claim 1, characterized in that The rolling assembly (20) comprises at least one rolling unit distributed along the axial direction of the eccentric ring (30), each of the rolling units comprises a plurality of rolling parts (21), and the plurality of rolling parts (21) of the rolling unit are distributed along the circumference of the eccentric ring (30).

3. The crankshaft assembly according to claim 2, characterized in that The rolling part (21) is a ball; or The rolling portion (21) is a roller, and the central axis of the rolling portion (21) is parallel to the central axis of the eccentric ring (30).

4. The crankshaft assembly according to claim 3, characterized in that The diameters of each rolling part (21) of the rolling assembly (20) are equal.

5. The crankshaft assembly according to claim 1, characterized in that The axial height of the eccentric shaft section (12) is equal to the axial height of the eccentric ring (30).

6. The crankshaft assembly according to claim 1, characterized in that There are two main shaft sections (11), and the two main shaft sections (11) are respectively connected to the two ends of the eccentric shaft section (12); the axial length of one main shaft section (11) is greater than the axial length of the other main shaft section (11).

7. The crankshaft assembly according to claim 6, characterized in that The crankshaft (10) is an integrally formed structure.

8. A cylinder mechanism, comprising a cylinder, a sliding member (91) and a crankshaft assembly, characterized in that: The crankshaft assembly is the crankshaft assembly according to any one of claims 1 to 7.

9. A compressor comprising a cylinder mechanism, characterized in that: The cylinder mechanism is the cylinder mechanism according to claim 8.

10. The compressor according to claim 9, characterized in that The compressor is a rolling rotor type compressor.

Images