CN210977875U

CN210977875U - Crankshaft and compressor with same

Info

Publication number: CN210977875U
Application number: CN201921480823.3U
Authority: CN
Inventors: 熊亮; 王勇; 霍喜军
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Landa Compressor Co Ltd
Priority date: 2019-09-06
Filing date: 2019-09-06
Publication date: 2020-07-10
Anticipated expiration: 2029-09-06

Abstract

The utility model discloses a crankshaft, which comprises an upper crankshaft comprising a first rotating shaft and a lower crankshaft comprising a second rotating shaft and an eccentric part; one end of the upper crankshaft connected with an external motor is protruded towards the periphery along the axis direction to form a thrust part. The outward bulge of the crankshaft forms a thrust part, so that the thrust area is increased, the contact pressure is reduced, and the wear surface abrasion resistance is improved. The utility model also provides a compressor of having this bent axle.

Description

Crankshaft and compressor with same

Technical Field

The utility model relates to a compressor technical field particularly, relates to a bent axle and have its compressor.

Background

The rolling rotor type rotary compressor usually adopts the lower end face of the auxiliary shaft part of the crankshaft as the crankshaft thrust part, and forms a sliding thrust friction pair by matching with the thrust face of the thrust plate, thereby timely limiting the axial movement of the crankshaft.

In the practical use process, the abrasion of the thrust friction pair is very serious, the performance of the compressor is seriously influenced, and the problems of thrust noise, electromagnetic noise and the like are caused.

Therefore, there is a need in the art for a solution to the above problems.

Disclosure of Invention

The utility model provides a crankshaft to the thrust portion that solves current crankshaft formation and thrust plate push away the face cooperation and form the vice mill of slip thrust friction and take photograph seriously, influence the problem of compressor performance.

Correspondingly, the utility model discloses still provide an application the compressor of bent axle.

In a first aspect, the present invention provides a crankshaft.

The crankshaft is divided into an upper crankshaft comprising a first rotating shaft and a lower crankshaft comprising a second rotating shaft and an eccentric part; the upper crankshaft is connected with the lower crankshaft, and one end of the upper crankshaft, which is connected with an external motor, protrudes towards the periphery along the axis direction to form a thrust part.

The outer surface of one end of the upper crankshaft is provided with an external thread, the inner surface of one end of the eccentric part of the lower crankshaft is provided with an internal thread, and the external thread is matched with the internal thread; the first rotating shaft is internally arranged on the upper crankshaft, and the eccentric part is connected with the first rotating shaft when the upper crankshaft is in threaded connection with the lower crankshaft.

Specifically, the outer surface of the thrust part is a circular arc surface.

Furthermore, a boss formed by protruding towards the periphery along the axis direction of the crankshaft is arranged at one end, close to the upper crankshaft, of the lower crankshaft, and the boss is an arc surface.

In a second aspect, the present invention provides a compressor.

The compressor comprises a crankshaft and a flange, wherein the crankshaft is arranged on the flange in a penetrating mode, and the compressor is characterized in that the crankshaft is any one of the crankshafts in the first aspect.

Further, the flange includes:

the second rotating shaft of the crankshaft penetrates through the lower flange;

the first rotating shaft of the crankshaft penetrates through the upper flange, the thrust part is matched with the upper flange, and a thrust curved surface is correspondingly arranged on the upper flange corresponding to the thrust part.

Specifically, the upper flange extends from inside to outside all around with the one end port that thrust portion is connected, forms a horn mouth, the horn mouth with further form the oil storage clearance between the thrust portion.

Preferably, the upper flange is provided with a journal, the joint of the upper crankshaft and the lower crankshaft is positioned in the journal, and the joint is positioned in the interval between one half of the length of the journal and the eccentric part.

Specifically, a boss which is formed by protruding towards the periphery along the axis direction of the crankshaft is arranged at one end of the lower crankshaft, which is close to the upper crankshaft, and the boss is an arc surface; the upper flange is inwards sunken corresponding to the boss so as to form an arc surface structure matched with the boss.

Compared with the prior art, the utility model discloses a scheme has following advantage:

the utility model discloses in, the one end that bent axle and outside motor are connected is followed the axle center direction and is formed thrust portion to protruding all around. The design can increase the thrust area, reduce the contact pressure and improve the wear surface abrasion resistance. Meanwhile, the thrust part is designed into an arc surface to assist the crankshaft to center automatically. Furthermore, the crankshaft can effectively improve the rigidity of the crankshaft and the deflection of a shaft system under the reinforcement of the thrust part, and is beneficial to improving the noise of the compressor.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 shows a schematic structural view of an embodiment of a crankshaft in the present invention;

fig. 2 shows a schematic structural view of an embodiment of a compressor in the present invention;

fig. 3 shows a schematic partial structure diagram of an embodiment of an oil storage gap in a compressor according to the present invention.

Wherein the figures include the following reference numerals:

1. a crankshaft; 11. a first rotating shaft; 12. a second rotating shaft; 20. an eccentric portion; 30. a thrust part; 10a, an upper crankshaft; 10b, a lower crankshaft; 101a, external threads; 101b, internal threads; 102b, a boss; 2. a flange; 3. an upper flange; 31. a thrust curved surface; 32. an arc surface structure; 4. a lower flange; 5, a cylinder; 6. a bell mouth; 7. the oil storage gap.

Detailed Description

In order to make the technical field person understand the scheme of the present invention better, the following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical scheme in the embodiments of the present invention.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.

Referring to fig. 1 and 2, the present invention provides a crankshaft.

The crankshaft 1 includes two portions, an upper crankshaft 10a and a lower crankshaft 10 b. The upper crankshaft 10a includes a first rotating shaft 11; the lower crankshaft 10b includes a second rotating shaft 12 and an eccentric portion 20. Wherein, the axes of the first rotating shaft 11 and the second rotating shaft 12 are overlapped, and the upper crankshaft 10a and the lower crankshaft 10b are connected. Wherein the eccentric portion 20 may be an eccentric wheel. In the embodiment of the present invention, the crankshaft 1 is used for a compressor. In the compressor, the crankshaft 1 is connected to an external motor. A thrust portion 30 is formed at one end of the crankshaft 1 connected to the motor. The thrust portion 30 is formed by protruding one end of the upper crankshaft 10a of the crankshaft 1 in the axial direction. The design that the crankshaft 1 protrudes towards the periphery to form the thrust part 30 can increase the thrust area, reduce the contact pressure, improve the wear surface abrasion resistance and contribute to improving the performance of the compressor.

Specifically, the outer surface of the thrust part 30 is a circular arc surface. The circle center of the arc surface of the thrust part 30 is located on the axis of the crankshaft 1, which can effectively assist the crankshaft to center automatically.

Meanwhile, the thrust part 30 is formed by protruding towards the periphery along the axis direction, and the radial length of the thrust part is lengthened, so that the radial rigidity of the crankshaft thrust part 30 is improved, the rigidity of a crankshaft can be effectively improved, and the shaft system deflection is improved.

In the present embodiment, the upper crankshaft 10a and the lower crankshaft 10b are screw-coupled. The first rotating shaft 11 is disposed inside the upper crankshaft 10 a. One end of the first rotating shaft 11 is located on an end surface of the upper crankshaft 10a near one end of the lower crankshaft 10 b. When the upper crankshaft 10a is coupled to the lower crankshaft 10b, the eccentric portion 20 is coupled to the first rotating shaft 11. The outer surface of one end of the upper crankshaft 10a is provided with an external thread 101a, the inner surface of one end of the lower crankshaft 10b is provided with an internal thread 101b, and the external thread 101a is matched with the internal thread 101 b. The end of the upper crankshaft 10a with the external thread is screwed into the end of the lower crankshaft 10b with the internal thread to achieve the threaded coupling.

Referring to fig. 1, in order to further ensure the thrust effect of the crankshaft, in a specific embodiment of the present invention, the lower crankshaft 10b is also provided with a boss 102b for realizing a partial thrust effect, the boss 102b is located at an end of the lower crankshaft 10b close to the first rotating shaft 11, the boss 102b is formed by protruding around along the axis direction of the crankshaft, and the surface of the boss 102b is an arc surface. The design can also increase the thrust area and reduce the contact pressure.

With continued reference to fig. 2, as mentioned above, in the present invention, the crankshaft is used in a compressor.

In the present embodiment, the compressor includes a crankshaft 1 and a flange 2. The crankshaft 1 is arranged on the flange 2 in a penetrating mode. The flange 2 comprises an upper flange 3 and a lower flange 4. The second rotating shaft 12 of the crankshaft 1 is arranged on the lower flange 4 in a penetrating way. The first rotating shaft 11 of the crankshaft 1 is arranged on the upper flange 3 in a penetrating way. The eccentric portion 20 of the crankshaft 1 is located between the upper flange 3 and the lower flange 4.

One end of the crankshaft 1 close to the motor is provided with a thrust part 30, correspondingly, one end of the upper flange 3 close to the motor is provided with a thrust curved surface 31, and the thrust part 30 is matched with the thrust curved surface 31. When the first rotating shaft 11 and the second rotating shaft 12 of the crankshaft rotate relative to the flange 2, the thrust part 30 is matched with the thrust curved surface 31, so that the thrust area is effectively increased, the abrasion of the compressor is reduced, the performance of the compressor is ensured, and the noise is reduced.

The compressor further comprises a cylinder 5, wherein the cylinder 5 is located between the upper flange 3 and the lower flange 4, and the cylinder 5 is installed below the upper flange 3.

In a preferred embodiment of the present invention, the upper flange 3 and the end connected to the thrust portion 30 form a bell mouth 6, and the bell mouth is formed by extending the port of the upper flange 3 from inside to outside. Meanwhile, a certain accommodating space is formed between the bell mouth 6 and the thrust part 30, the accommodating space is the oil storage gap 7, the abrasion and the friction force of the thrust part are reduced, and the noise is further reduced while the performance of the compressor is ensured.

The upper flange 3 has a journal 8, and the junction of the upper crankshaft 10a and the lower crankshaft 10b is located in the journal 8. At the same time, the junction is located in the interval between half the length of the journal 8 and the eccentric 20. The joint is controlled to be in the half of the inner side of the journal 8, which contributes to the improvement of the structural stability.

Specifically, since the lower crankshaft 10b has a boss 102b with an arc surface, the upper flange 3 is recessed inward corresponding to the boss 102b to form an arc surface structure 32 adapted to the boss 102 b. The central positions of the boss 102b of the lower crankshaft 10b and the arc surface structure of the upper flange 3 are both located on the axis of the crankshaft 1, and the axial movement of the crankshaft can be effectively controlled by matching the boss 102b of the lower crankshaft 10b with the arc surface structure 32 of the upper flange.

In the compressor, the last bent axle one end that the bent axle is connected with outside motor is along axle center direction to protruding thrust portion that forms all around. The design can increase the thrust area, reduce the contact pressure and improve the wear surface abrasion resistance. Meanwhile, the thrust part is designed into an arc surface to assist the crankshaft to center automatically. Furthermore, the crankshaft can effectively improve the rigidity of the crankshaft and the deflection of a shaft system under the reinforcement of the thrust part, and is beneficial to improving the noise of the compressor.

The above is to the embodiment of the technical solution provided by the present invention described in detail, and to the general technical personnel in this field, according to the idea of the embodiment of the present invention, there is a change part on the concrete implementation and the application range, to sum up, the content of this specification should not be understood as the limitation of the present invention.

Claims

1. A crankshaft is characterized in that the crankshaft is divided into an upper crankshaft comprising a first rotating shaft and a lower crankshaft comprising a second rotating shaft and an eccentric part; the upper crankshaft is connected with the lower crankshaft, and one end of the upper crankshaft, which is connected with an external motor, protrudes towards the periphery along the axis direction to form a thrust part.

2. The crankshaft of claim 1, wherein an outer surface of one end of the upper crankshaft is provided with an external thread, an inner surface of one end of the eccentric portion of the lower crankshaft is provided with an internal thread, and the external thread is matched with the internal thread; the first rotating shaft is internally arranged on the upper crankshaft, and the eccentric part is connected with the first rotating shaft when the upper crankshaft is in threaded connection with the lower crankshaft.

3. The crankshaft of claim 1, wherein an outer surface of the thrust portion is a circular arc surface.

4. The crankshaft of claim 1, wherein a boss protruding in a circumferential direction along an axial direction of the crankshaft is provided at one end of the lower crankshaft adjacent to the upper crankshaft, and the boss is a circular arc surface.

5. A compressor, characterized by, including bent axle and flange, the bent axle wears to locate on the flange, the bent axle is the bent axle of any one of claims 1-4.

6. The compressor of claim 5, wherein the flange comprises:

7. The compressor of claim 6, wherein an end port of the upper flange connected to the thrust portion extends from inside to outside to the periphery to form a bell mouth, and an oil storage gap is further formed between the bell mouth and the thrust portion.

8. The compressor of claim 6, wherein the upper flange has a journal thereon, and wherein a junction of the upper crankshaft and the lower crankshaft is located within the journal, and wherein the junction is located in a region between one-half of a length of the journal and the eccentric portion.

9. The compressor of claim 8, wherein a boss formed by protruding towards the periphery along the axial direction of the crankshaft is arranged at one end of the lower crankshaft close to the upper crankshaft, and the boss is in an arc surface; the upper flange is inwards sunken corresponding to the boss so as to form an arc surface structure matched with the boss.