CN215949764U - Novel compressor piston structure - Google Patents
Novel compressor piston structure Download PDFInfo
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- CN215949764U CN215949764U CN202122020533.4U CN202122020533U CN215949764U CN 215949764 U CN215949764 U CN 215949764U CN 202122020533 U CN202122020533 U CN 202122020533U CN 215949764 U CN215949764 U CN 215949764U
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Abstract
The utility model discloses a novel compressor piston structure, wherein a piston body is of a cylindrical structure, two connecting columns for connecting rods are integrally and backwards extended from the piston body, piston pin holes for penetrating piston pins are symmetrically formed in two sides of the center line of a piston and penetrate through the connecting columns in the radial direction of the piston body, an avoiding space for the connecting rods to pass through is formed between the two connecting columns, and a pin shaft hole for locking the piston pins is formed in the rear end face of at least one connecting column. The compressor piston structure effectively solves the problems of multiple processing procedures of the compressor piston, large friction force between the outer circular surface of the piston and the inner wall of the cylinder hole and high energy consumption in the prior art, and has the advantages of light weight, low cost and low energy consumption.
Description
Technical Field
The utility model relates to the technical field of compressors, in particular to a novel compressor piston structure which is mainly applied to a small-sized refrigeration compressor.
Background
With the wide application of small refrigeration equipment such as vehicle-mounted refrigerators, the demand of small refrigeration compressors is increasing, and such compressors are required to be light in weight, low in cost and low in energy consumption besides the requirement of small size. The prior art compressor has difficulty in satisfying the above requirements. And the piston of the compressor is a main component of the compressor, so the optimization of the piston structure has great significance on the light weight, low cost and low energy consumption of the compressor. The compressor piston in the prior art is provided with the annular oil grooves and the oil return holes on the outer circular surface, so that the piston is heavy and has multiple processing procedures, and meanwhile, the contact area between the outer circular surface of the piston and the inner wall of the cylinder hole is large, the friction force is large, and the energy consumption is high. The publication date is 2019, 2 and 19, and the publication number is CN109356819A, which discloses a piston structure and a compressor thereof, wherein the piston structure comprises a piston body, the piston body is in a columnar structure, a first end of the piston body is a working end, and a second end of the piston body is used for being connected with a connecting rod; the second end of the piston body is provided with a connecting part for the locking piece to penetrate through to lock the piston pin, the connecting part is at least two, one of the two connecting parts is arranged opposite to the first end of the piston pin, and the other connecting part is arranged opposite to the second end of the piston pin. The end of the piston body is provided with at least two connecting parts for the locking piece to penetrate through, and the two connecting parts are correspondingly arranged at the two ends of the piston pin respectively, so that the piston pin and the piston body can be assembled without aligning the piston pin when the piston pin is assembled, the assembling process that the piston pin is assembled and needs to be aligned is saved, and the assembling efficiency of the piston is improved. The Chinese patent document with publication number CN204738928U, whose publication number is 2015, 11 and 4, discloses a compressor piston structure, which is integrally a hollow cylinder, the upper surface of the piston is open, and the lower surface of the piston is closed; the lower surface of the piston is provided with a circular bulge; an annular groove is formed in the middle of the outer surface of the piston; two small through holes are symmetrically arranged on the annular groove and communicated with the interior of the piston; two large through holes are also formed in the outer surface of the piston and communicated with the interior of the piston; the piston structure of the compressor can prevent the connecting rod from being blocked, and can not cause the power of the compressor to be larger. However, the piston of the compressor is provided with the annular oil groove and the oil return hole on the outer circular surface, so that the processing procedures are multiple, meanwhile, the contact area between the outer circular surface of the piston and the inner wall of the cylinder hole is large, the friction force is large, the energy consumption is high, and the requirements of small refrigeration equipment on the light weight, low cost and low energy consumption of the compressor cannot be met.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems that the compressor piston in the prior art is provided with an annular oil groove and an oil return hole on the outer circular surface, has more processing procedures, large contact area between the outer circular surface of the piston and the inner wall of a cylinder hole, large friction force and high energy consumption, and cannot meet the requirements of small refrigeration equipment on light weight, low cost and low energy consumption of the compressor.
The utility model adopts the technical scheme that the novel compressor piston structure comprises a piston body, wherein the piston body is of a cylindrical structure, the front end of the piston body is a working end, and the rear end of the piston body is connected with a connecting rod; the piston body go up backward integrative extension and be provided with the spliced pole that is used for connecting the connecting rod, the spliced pole be two, set up in the bilateral symmetry of the central line of piston for the piston pin hole that wears to establish the piston pin radially runs through the spliced pole at the piston body, form between two spliced poles and supply the dodge space that the connecting rod passed through, the rear end face of at least one spliced pole is equipped with the round pin shaft hole that is used for locking piston pin.
Compared with the piston structure in which the connecting column is integrally arranged on the inner side of the outer circular surface of the piston in the prior art, the piston structure has the advantages that the connecting column for connecting the connecting rod is arranged on the rear side of the piston body in an extending manner, the axial length of the piston body (the part with the outer circular surface of the piston) is greatly reduced, the weight of the piston is reduced, and the processing amount of the outer circular surface of the piston is also greatly reduced; meanwhile, the annular oil groove and the oil return hole on the outer circular surface of the piston in the prior art are eliminated, so that the machining procedures are reduced, and the machining cost is also reduced; in addition, the contact area between the outer circular surface of the piston and the inner wall of the cylinder hole is reduced, the friction force is reduced, the performance is met during the operation of the compressor, the power is lower, the energy consumption is obviously reduced, and the compressor and corresponding final products such as a refrigerator and the like are more economic and environment-friendly. Therefore, the novel compressor piston structure solves the problems that the compressor piston in the prior art is provided with the annular oil groove and the oil return hole on the outer circular surface, has more processing procedures, and simultaneously has large contact area between the outer circular surface of the piston and the inner wall of the cylinder hole, large friction force and high energy consumption, and can not meet the requirements of small refrigeration equipment on light weight, low cost and low energy consumption of the compressor.
Preferably, the cross section of the connecting column is in an arch shape, one side of the connecting column, which is far away from the center line of the piston, is an arc edge, and the radius of the arc edge is smaller than that of the piston body. The arch is a closed graph with one arc edge and the other three edges being straight edges, the arc edge corresponds to the outer circular surface of the piston, and the circular radius of the arc edge is smaller than that of the piston body, so that the connecting column can be prevented from contacting with the inner wall of the cylinder hole.
Preferably, a cavity with a rear opening is formed in the piston body, the front end of the connecting column extends forwards to be connected with the front end of the piston body, and one side, away from the center line of the piston, of the connecting column is integrally connected with the inner wall of the cavity. The weight that sets up the cavity and can alleviate the piston, the front end of spliced pole extends forward and links to each other with the front end of piston body, can ensure the structural strength of spliced pole.
Preferably, the cavity at the rear part of the piston body has an I-shaped cross section, and the I-shaped cross section comprises a rectangle in the middle and arches symmetrically connected to two sides of the rectangle.
Preferably, the side wall of the cavity far away from the connecting column is of an equal-wall-thickness structure, and a transition structure is arranged between the front end of the connecting column and the inner wall of the cavity of the piston body. The transition structure can improve the joint strength of the piston body and the connecting column, and reduces the material usage amount of the piston on the premise of ensuring the strength of the piston.
Preferably, the length of the connecting column at the rear part of the piston is 0.8-1.2 times of the axial length of the piston body, and the diameter of the piston body is 2-3 times of the axial length of the piston body. Compared with the traditional piston structure, the piston body part of the utility model has smaller axial length and diameter, thereby reducing the weight of the piston and reducing the processing amount of the outer circular surface of the piston.
Preferably, the total mass of the finished piston product is 16-19 grams, and the volume is 2.32-2.75 cubic centimeters. The piston is a small piston, and is suitable for small refrigeration equipment such as a small refrigerator.
The utility model has the advantages that the novel compressor piston structure effectively solves the problems that the compressor piston in the prior art is provided with the annular oil groove and the oil return hole on the outer circular surface, has more processing procedures, large contact area between the outer circular surface of the piston and the inner wall of the cylinder hole, large friction force and high energy consumption, and cannot meet the requirements of small refrigeration equipment on light weight, low cost and low energy consumption of the compressor, and has the advantages of light weight, low cost and low energy consumption.
Drawings
FIG. 1 is a schematic perspective view of a piston according to the present invention;
FIG. 2 is a schematic perspective view of a piston blank according to the present invention;
FIG. 3 is a perspective view of a prior art piston;
fig. 4 is a perspective view of a prior art piston blank.
In the figure: 1. the piston comprises a piston body, 2 connecting columns, 3 piston pin holes, 4 avoiding spaces, 5 pin shaft holes, 6 cavities, 7 transition structures, 8 annular oil grooves and 9 oil return holes.
Detailed Description
The following provides a further description of embodiments of the present invention by way of examples and with reference to the accompanying drawings.
Example 1
In embodiment 1 shown in fig. 1, a novel piston structure of a compressor comprises a piston body 1, wherein the piston body is of a cylindrical structure, the front end of the piston body is a working end, and the rear end of the piston body is used for connecting with a connecting rod; the piston body is integrally extended backwards to form two connecting columns 2 for connecting the connecting rods, the two connecting columns are symmetrically arranged on two sides of the center line of the piston, the cross section of each connecting column is in an arch shape, one side of each connecting column, which is far away from the center line of the piston, is an arc edge, and the radius of the arc edge is smaller than that of the piston body; and piston pin holes 3 for penetrating piston pins penetrate through the connecting columns in the radial direction of the piston body, an avoiding space 4 for the connecting rods to pass through is formed between the two connecting columns, and a pin shaft hole 5 for locking the piston pins is formed in the rear end face of one connecting column.
The piston is characterized in that a cavity 6 with a rear opening is formed in the piston body, the front end of the connecting column extends forwards to be connected with the front end of the piston body, and one side, away from the center line of the piston, of the connecting column is integrally connected with the inner wall of the cavity. The cross section of the cavity at the rear part of the piston body is I-shaped, and the I-shaped comprises a rectangle in the middle and arches symmetrically connected to two sides of the rectangle. The side wall of the cavity far away from the connecting column is of an equal-wall-thickness structure, and a transition structure 7 is arranged between the front end of the connecting column and the inner wall of the cavity of the piston body.
The length of the connecting column at the rear part of the piston is 0.8-1.2 times (1.05 times in the embodiment) of the axial length of the piston body, and the diameter of the piston body is 2-3 times (2.5 times in the embodiment) of the axial length of the piston body.
The total mass of the finished piston product is 16-19 grams (17.2 grams in this example) and the volume is 2.32-2.75 cubic centimeters (2.5 cubic centimeters in this example). The final product of the machine body of the embodiment is applied to an on-vehicle refrigerator. And the finished piston product (see figure 3) with the same specification in the prior art has the total mass of 23.8 grams and the volume of 3.5 cubic centimeters.
According to the piston structure, the connecting column for connecting the connecting rod is arranged on the rear side of the piston body in an extending mode, and compared with a piston structure in the prior art that the connecting column is integrally arranged on the inner side of the outer circular surface of the piston, the axial length of the piston body is greatly reduced, so that the weight of the piston is reduced, and the processing amount of the outer circular surface of the piston is greatly reduced; meanwhile, the annular oil groove 8 and the oil return hole 9 (shown in figure 3) on the outer circular surface of the piston in the prior art are eliminated, so that the processing procedures are reduced, and the processing cost is reduced; in addition, the contact area between the outer circular surface of the piston and the inner wall of the cylinder hole is reduced, the friction force is reduced, the performance is met during the operation of the compressor, the power is lower, the energy consumption is obviously reduced, and the compressor and a corresponding final product are more economic and environment-friendly.
Fig. 2 is a perspective view of the piston blank of the present invention, which has a mass reduced from 27.5 grams to 20.7 grams, which results in a material savings of about 25% when compared to a prior art piston blank of the same gauge (see fig. 4).
In addition to the above embodiments, the technical features or technical data of the present invention may be reselected and combined to form new embodiments within the scope of the claims and the specification of the present invention, which are all realized by those skilled in the art without creative efforts, and thus, the embodiments of the present invention not described in detail should be regarded as specific embodiments of the present invention and are within the protection scope of the present invention.
Claims (7)
1. A novel compressor piston structure comprises a piston body (1), wherein the piston body is of a cylindrical structure, the front end of the piston body is a working end, and the rear end of the piston body is connected with a connecting rod; the piston is characterized in that the piston body is integrally provided with two connecting columns (2) extending backwards for connecting the connecting rods, the two connecting columns are symmetrically arranged on two sides of the center line of the piston, piston pin holes (3) for penetrating piston pins penetrate through the connecting columns in the radial direction of the piston body, an avoiding space (4) for the connecting rods to pass through is formed between the two connecting columns, and the rear end face of at least one connecting column is provided with a pin shaft hole (5) for locking the piston pin.
2. The novel compressor piston structure as claimed in claim 1, wherein the connecting column has an arch-shaped cross section, and a side of the connecting column away from the center line of the piston is a circular arc side, and the circular arc side has a circular radius smaller than that of the piston body.
3. The piston structure of compressor as claimed in claim 1, wherein the piston body is provided with a cavity (6) with a rear opening, the front end of the connecting column extends forwards to be connected with the front end of the piston body, and the side of the connecting column away from the center line of the piston is integrally connected with the inner wall of the cavity.
4. The piston structure of compressor as claimed in claim 3, wherein the cavity at the rear of the piston body has an i-shape in cross section, the i-shape including a central rectangle and two bow-shapes symmetrically connected to both sides of the rectangle.
5. The novel compressor piston structure as claimed in claim 4, wherein the side wall of the cavity far away from the connecting column is of a uniform wall thickness structure, and a transition structure (7) is arranged between the front end of the connecting column and the inner wall of the cavity of the piston body.
6. The piston structure of compressor as claimed in claim 1, wherein the length of the connecting column at the rear of the piston is 0.8-1.2 times the axial length of the piston body, and the diameter of the piston body is 2-3 times the axial length of the piston body.
7. The novel compressor piston structure as claimed in any one of claims 1 to 6, wherein the piston product has a total mass of 16 to 19 g and a volume of 2.32 to 2.75 cc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122020533.4U CN215949764U (en) | 2021-08-25 | 2021-08-25 | Novel compressor piston structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122020533.4U CN215949764U (en) | 2021-08-25 | 2021-08-25 | Novel compressor piston structure |
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| Publication Number | Publication Date |
|---|---|
| CN215949764U true CN215949764U (en) | 2022-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122020533.4U Active CN215949764U (en) | 2021-08-25 | 2021-08-25 | Novel compressor piston structure |
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| CN (1) | CN215949764U (en) |
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- 2021-08-25 CN CN202122020533.4U patent/CN215949764U/en active Active
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