CN212803506U

CN212803506U - Piston crankshaft mechanism of refrigerator compressor

Info

Publication number: CN212803506U
Application number: CN202021363208.7U
Authority: CN
Inventors: 戴竟雄; 罗祥胜; 金盛江; 柳泽林
Original assignee: Huangshi Dongbei Electrical Appliance Co Ltd
Current assignee: Huangshi Donper Compressor Co Ltd
Priority date: 2020-07-13
Filing date: 2020-07-13
Publication date: 2021-03-26
Anticipated expiration: 2030-07-13

Abstract

The utility model discloses a refrigerator compressor piston crankshaft mechanism through set up inserted sheet mechanism at piston inner chamber to and set piston, bent axle, connecting rod to the engineering plastics material, can reduce the complete machine noise of compressor, reduce between piston and the cylinder wall, and the friction loss between each bearing of bent axle, reduce the energy consumption.

Description

Piston crankshaft mechanism of refrigerator compressor

Technical Field

The utility model belongs to the technical field of refrigerator compressor, especially a refrigerator compressor piston crankshaft mechanism.

Background

The refrigerator compressor drives the crankshaft to rotate through the motor, and the crankshaft enables the piston to reciprocate through the connecting rod, so that low-temperature and low-pressure refrigerant steam is changed into high-temperature and high-pressure refrigerant, and the refrigerant is pushed to form a refrigeration cycle in a cycle. The piston and the crankshaft of the traditional compressor are made of metal materials such as powder metallurgy, when the compressor runs, friction loss can be generated between the piston and the cylinder wall, friction loss can be generated between bearings of the crankshaft, the two parts of loss can not be ignored, the input power of the compressor is increased, and the performance of the compressor is influenced. At present, in the field of refrigerator compressors, few people use non-metallic materials as raw materials of pistons, crankshafts and connecting rods.

Disclosure of Invention

In order to solve the problems of the prior art, the utility model provides a refrigerator compressor piston crankshaft mechanism realizes through following technical scheme.

A piston crankshaft mechanism of a refrigerator compressor comprises a piston, a crankshaft and a connecting rod, wherein an inner cavity of the piston is provided with an inserting piece mechanism, the inserting piece mechanism comprises a sheet-shaped connecting piece and connecting pieces connected to two sides of the connecting piece, the connecting piece is attached to the bottom of the inner cavity, and the connecting pieces are oppositely attached to the wall of the inner cavity of the piston;

the side surface of the piston is provided with 2 first limiting holes which are opposite; a piston pin is inserted into one of the first limiting holes and penetrates through the inner cavity of the piston to be inserted into the other first limiting hole, and the piston pin is positioned between the 2 connecting sheets; a first shaft sleeve at one end of the connecting rod enters the inner cavity of the piston and is rotatably sleeved on the piston pin, and a second shaft sleeve at the other end of the connecting rod is rotatably sleeved on an eccentric shaft at the top end of the crankshaft; the end surface of the piston facing the connecting rod and the piston pin are respectively provided with a corresponding pin hole, and an elastic pin is inserted into the pin holes to fix the piston and the piston pin; the piston, the crankshaft, the connecting rod and the inserting sheet mechanism are all workpieces made of engineering plastics.

According to the piston crankshaft mechanism of the refrigerator compressor, the bottom end of the crankshaft is connected with the rotor of the driving motor, and the crankshaft drives the eccentric shaft at the top end to do circular motion when rotating, so that the connecting rod and the piston are pulled to do reciprocating motion. Through set up inserted sheet mechanism in the inner chamber of piston, can the separation inhale the exhaust valve piece and pat the noise that valve plate and limiting plate produced, also can reduce the fluid noise that refrigerant gas produced at the piston inner chamber simultaneously. The piston, the crankshaft, the connecting rod and the insert mechanism are made of high-temperature-resistant, high-pressure-resistant, oil-resistant, refrigerant-resistant and wear-resistant engineering plastics, so that the lightweight of the compressor can be realized, and the load of a machine core on a supporting structure during the operation of the compressor is reduced, thereby reducing the vibration of the compressor; the friction loss between the piston and the cylinder wall and between bearings of the crankshaft can be reduced, the input power of the compressor is reduced, and the performance of the compressor is improved.

Preferably, 2 first oil holes are oppositely arranged on the side surface of the piston, 2 second oil holes corresponding to the 2 first oil holes are arranged on the connecting piece, and the 2 first oil holes are respectively communicated and aligned with the 2 second oil holes. The oil hole is arranged, so that lubricating oil can flow conveniently and can be coated uniformly, and the reciprocating motion of the piston is smoother.

Preferably, the side wall that the inner chamber was laminated with the connection piece is the cambered surface, connects the 2 cambered surface the side wall of inner chamber is the plane.

More preferably, the side walls of the 2 cambered surfaces of the inner cavity are respectively provided with 1 sliding groove along two axial side edges of the piston, and the connecting piece is provided with raised lines matched with the sliding grooves in shape along two axial sides of the piston. The spout matches the gomphosis each other and is in the same place with the sand grip, can make the lateral wall of inserted sheet mechanism and inner chamber further laminate, avoids after long-term the use, and inserted sheet mechanism produces rotation or slip in the inner chamber of piston.

Preferably, the connecting piece and the connecting piece are inserted into the inner cavity by interference fit.

Preferably, the piston, the crankshaft, the connecting rod and the insert mechanism are structural members made of polyether-ether-ketone, high-temperature nylon or PPS (polyphenylene sulfide).

Compared with the prior art, the beneficial effects of the utility model are that: this patent is through setting up inserted sheet mechanism at the piston inner chamber to and set piston, bent axle, connecting rod into the engineering plastics material, can reduce the complete machine noise of compressor, reduce between piston and the cylinder wall, and the frictional loss between each bearing of bent axle, reduce the energy consumption.

Drawings

FIG. 1 is a front view of a piston crankshaft mechanism of a refrigerator compressor according to embodiment 1;

FIG. 2 is a left side view of the piston of FIG. 1;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 4 is a left side view of the tab mechanism of FIG. 1;

FIG. 5 is a front view of a piston crankshaft mechanism of a refrigerator compressor according to embodiment 2;

FIG. 6 is a left side view of the piston of FIG. 5;

in the figure: 1. a piston; 2. a crankshaft; 3. a connecting rod; 4. an inner cavity; 5. a connecting member; 6. connecting sheets; 7. a first limit hole; 8. a piston pin; 9. a first bushing; 10. a second shaft sleeve; 11. an eccentric shaft; 12. a pin hole; 13. an elastic pin; 14. a first oil hole; 15. a second oil hole; 16. a chute; 17. and (4) raised strips.

Detailed Description

The technical solutions of the embodiments in this patent will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments, not all embodiments, of this patent. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the patent without making creative efforts, shall fall within the protection scope of the patent.

In the description of this patent, it is noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the patent and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the patent. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of this patent, it is noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "communicating" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. It is to be noted that all the figures are exemplary representations. The meaning of the above terms in this patent may be specifically understood by those of ordinary skill in the art.

The patent is described in further detail below with reference to specific embodiments and with reference to the attached drawings.

Example 1

As shown in fig. 1-4, the piston crankshaft mechanism of the refrigerator compressor provided in this embodiment includes a piston 1, a crankshaft 2 and a connecting rod 3, an inner cavity 4 of the piston 1 is provided with a sheet-shaped connecting member 5 and connecting pieces 6 connected to both sides of the connecting member 5, the connecting member 5 is attached to the bottom of the inner cavity 4, and the connecting pieces 6 are attached to the inner cavity wall of the piston 1 in opposite directions; the side wall of the inner cavity 4, which is attached to the connecting sheet 6, is an arc surface, and the side wall of the inner cavity 4, which is connected with the side walls of the 2 arc surfaces, is a plane;

as shown in fig. 1 and 3, the side surface of the piston 1 is provided with 2 first limiting holes 7; a piston pin 8 is inserted into one of the first limiting holes 7 and inserted into the other first limiting hole 7 through the inner cavity 4 of the piston 1, and the piston pin 8 is positioned between 2 connecting pieces 6; a first shaft sleeve 9 at one end of the connecting rod 3 enters the inner cavity 4 of the piston 1 and is rotatably sleeved on the piston pin 8, and a second shaft sleeve 10 at the other end of the connecting rod 3 is rotatably sleeved on an eccentric shaft 11 at the top end of the crankshaft 2; the end surface of the piston 1 facing the connecting rod 3 and the piston pin 8 are respectively provided with corresponding pin holes 12, and an elastic pin 13 is inserted into the pin holes 12 to fix the piston 1 and the piston pin 8; the connecting piece 6 and the connecting piece 5 are inserted into the inner cavity 4 in an interference fit manner; the piston 1, the crankshaft 2, the connecting rod 3 and the insert mechanism are all workpieces made of engineering plastics.

Example 2

As shown in fig. 5 and 6, the piston crankshaft mechanism of the refrigerator compressor provided by the embodiment is optimized on the basis of the embodiment as follows:

1. the side surface of the piston 1 is provided with 2 opposite first oil holes 14, 2 connecting pieces 6 are provided with second oil holes 15 corresponding to the 2 first oil holes 14, and the 2 first oil holes 14 are respectively communicated and aligned with the 2 second oil holes 15;

2. the side walls of the 2 cambered surfaces of the inner cavity 4 are respectively provided with 1 sliding groove 16 along two axial side edges of the piston 1, and the connecting piece 6 is provided with convex strips 17 matched with the sliding grooves 16 in shape along two axial sides of the piston 1.

The above embodiments describe the implementation of the present invention in detail, however, the present invention is not limited to the specific details of the above embodiments. Within the scope of the claims and the technical idea of the present invention, various simple modifications and changes can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

Claims

1. The piston crankshaft mechanism of the refrigerator compressor is characterized by comprising a piston, a crankshaft and a connecting rod, wherein an insert mechanism is arranged in an inner cavity of the piston and comprises a flaky connecting piece and connecting pieces connected to two sides of the connecting piece, the connecting piece is attached to the bottom of the inner cavity, and the connecting pieces are oppositely attached to the wall of the inner cavity of the piston;

2. The piston crankshaft mechanism of the refrigerator compressor according to claim 1, wherein 2 first oil holes are oppositely formed on the side surface of the piston, 2 second oil holes corresponding to the 2 first oil holes are formed on the 2 connecting pieces, and the 2 first oil holes are respectively communicated and aligned with the 2 second oil holes.

3. The piston crankshaft mechanism of the refrigerator compressor as claimed in claim 1, wherein the side wall of the inner cavity attached to the connecting piece is an arc surface, and the side wall of the inner cavity between the side walls of 2 arc surfaces is a plane.

4. The piston crankshaft mechanism of the refrigerator compressor as claimed in claim 3, wherein the side walls of the 2 cambered surfaces of the inner cavity are respectively provided with 1 sliding groove along the two axial sides of the piston, and the connecting piece is provided with raised strips matched with the sliding grooves along the two axial sides of the piston.

5. The refrigerator compressor piston crankshaft mechanism of claim 1, wherein said connecting tab and connecting member are inserted into said cavity by interference fit.

6. The refrigerator compressor piston crankshaft mechanism according to claim 1, wherein the piston, crankshaft, connecting rod and tab mechanism are structural members of polyetheretherketone, high temperature nylon or PPS.