JP2002266758A - Hermetic compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a friction coefficient of a sliding part having high possibility of causing abrasion among a connecting rod, a main shaft, and a piston pin due to an increase in friction coefficient. SOLUTION: This hermetic compressor is provided with the connecting rod 58 transmitting the rotation of a crankshaft 54 to a piston 57, and the piston pin 59 connecting the connecting rod 58 to the piston 57. The friction of the sliding part can be reduced by disposing a coating material 1 having a low friction coefficient in the crankshaft 54 and the sliding part of the connecting rod facing the piston pin 59.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a hermetic compressor used for refrigerators, air conditioners, dehumidifiers and the like.

[0002]

2. Description of the Related Art In recent years, the operating load of a hermetic compressor has been increasing due to the multifunctionality of a system such as a refrigerator and a severe use environment, and it is necessary to increase the wear resistance of a sliding portion.

A conventional hermetic compressor is disclosed in
There is one disclosed in Japanese Patent Publication No. -186075.

Hereinafter, the conventional hermetic compressor will be described with reference to the drawings.

FIG. 16 is a sectional view of a conventional hermetic compressor. 16, reference numeral 50 denotes a closed container, 51 denotes a compression element elastically supported by the closed container 50, and 52 denotes a compression element 51.
, 53 is a part of the rotor of the electric element 52, 54 is a crankshaft fixed to the rotor 53, 55 is a bearing for supporting the crankshaft 54, 5.
6 is a cylinder bore portion of the compression element 51, 57 is a piston sliding on the cylinder bore portion 56, 58 is a connecting rod for transmitting rotation of the crankshaft 54 to the piston 57, 59 is a piston pin connecting the connecting rod 58 and the piston 57, and 60 is a connecting rod. An oil supply hole 61 is provided at 58, and is a refrigerator oil sealed at the bottom of the closed container 50.

The operation of the hermetic compressor constructed as described above will be described below. The refrigerating machine oil 61 sealed in the bottom of the sealed container 50 is sucked up by the crankshaft 54 rotated by the electric element 52, and is passed through the oil supply hole 60 opened in the connecting rod 58 to thereby remove the piston pin 5.
Refrigerating machine oil 61 is supplied to the sliding portion between 9 and the connecting rod 58.

[0007]

However, in the above configuration, the operating load increases, and the friction coefficient increases under severe conditions in the boundary lubrication area and the metal contact area, and the connecting rod, the main shaft and the piston pin are worn. The likelihood increases.

An object of the present invention is to solve the conventional problem, and an object of the present invention is to reduce a friction coefficient of a sliding portion between a connecting rod and a piston pin.

[0009]

According to a first aspect of the present invention, there is provided a compression element elastically supported in a closed container, an electric element, and a crankshaft fixed to a rotor of the electric element. A cylinder bore portion of the compression element, a piston that slides in the cylinder bore portion, a connecting rod that transmits rotation of the crankshaft to the piston, and a piston pin that connects the connecting rod and the piston. A coating material having a low friction coefficient is provided on at least one of the piston pins and the sliding portion of the connecting rod. The surface roughness of the sliding portion is improved, the friction coefficient is reduced, and wear is less likely to occur.

According to a second aspect of the present invention, there is provided a compression element elastically supported in a closed container, an electric element, a crankshaft fixed to a rotor of the electric element, a cylinder bore of the compression element, A piston that slides in the cylinder bore portion, a connecting rod that transmits rotation of the crankshaft to the piston, and a piston pin that connects the connecting rod and the piston; at least one of the crankshaft and the piston pin and the connecting rod The sliding portion is provided with a cylindrical member formed of a material having a low coefficient of friction. The surface roughness of the sliding portion is improved, the coefficient of friction is reduced, and wear is less likely to occur.

According to a third aspect of the present invention, in addition to the second aspect of the present invention, a hole is formed through the outer peripheral surface and the inner peripheral surface of the cylindrical member, and a groove is provided on the inner peripheral surface. In addition, the surface roughness of the sliding portion is improved, lubrication is performed smoothly, the coefficient of friction is reduced, and wear is less likely to occur.

According to a fourth aspect of the present invention, in the second aspect of the invention, there is provided a cylindrical member in which a long fiber material having a low coefficient of friction is formed into a helical cylinder. Is smoothly supplied to the sliding portion from the gap between the spirally wound collective wires, so that the sliding portion is less likely to be worn.

According to a fifth aspect of the present invention, in the second aspect of the present invention, a material having a low coefficient of friction is coated on a surface of a cylindrical member formed by forming a wire into a helical cylinder. The surface roughness of the portion is improved, and the refrigerating machine oil is smoothly supplied to the sliding portion from the gap between the spirally wound wires, so that the sliding portion is less likely to be worn.

According to a sixth aspect of the present invention, in the second aspect of the present invention, there is provided a connecting rod having a pipe and a low friction coefficient cylindrical member having through holes at both ends of the pipe, into which the pipe is inserted. The surface roughness of the sliding portion is improved, lubrication is smoothly performed via the pipe, the friction coefficient is reduced, and wear is less likely to occur. Further, since a hollow pipe is used for connecting the cylindrical members, the weight can be reduced.

According to a seventh aspect of the present invention, in the sixth aspect, the pipe and the cylindrical member are made of the same material, and the cylindrical member is covered with a coating material having a low coefficient of friction. The surface roughness of the part is improved, lubrication is performed smoothly, the coefficient of friction is reduced, and wear is less likely to occur.

According to an eighth aspect of the present invention, in the sixth or seventh aspect, the pipe and the cylindrical member are screwed together, and the sliding portion is polished into a simple cylindrical shape. Therefore, only the inner surface is efficiently improved in surface roughness of the sliding portion, lubrication is performed smoothly, the coefficient of friction is reduced, and wear is less likely to occur.

According to a ninth aspect of the present invention, in the invention of the eighth aspect, at least a connecting portion between the pipe and the cylindrical portion is covered with a material having a low friction coefficient. The degree of improvement is improved, the lubrication is performed smoothly, the coefficient of friction is reduced, and wear is less likely to occur.

According to a tenth aspect of the present invention, there is provided a compression element elastically supported in a closed container, an electric element, a crankshaft fixed to a rotor of the electric element, a cylinder bore of the compression element, A composite including a piston sliding in the cylinder bore, a connecting rod for transmitting rotation of the crankshaft to the piston, and a piston pin connecting the connecting rod and the piston, wherein the connecting rod is coated with a resin material having a low friction coefficient. The surface roughness of the sliding portion is improved, lubrication is performed smoothly, the coefficient of friction is reduced, and wear is less likely to occur.

An eleventh aspect of the present invention provides a compression element elastically supported in a closed container, an electric element, a crankshaft fixed to a rotor of the electric element, a cylinder bore of the compression element, A piston that slides in the cylinder bore portion, a connecting rod that transmits rotation of the crankshaft to the piston, and a piston pin that connects the connecting rod and the piston; at least one of the crankshaft and the piston pin and the connecting rod An insert member with a low coefficient of friction is arranged on the sliding part.The surface roughness of the sliding part is improved while maintaining the reasonable arrangement and structural stability of the low friction coefficient member, and the friction coefficient is reduced. It becomes smaller and wear is less likely to occur.

According to a twelfth aspect of the present invention, in the invention of the eleventh aspect, an insert member having a low friction coefficient is provided on a semicircular portion on a piston pin side in a sliding portion of a crankshaft. The sliding part of the pin is located on the semicircular part on the crankshaft side.Specifically, it is possible to improve the surface roughness of the sliding part and reduce the coefficient of friction by specifying the necessary parts. Wear is less likely to occur.

According to a thirteenth aspect of the present invention, in addition to the eleventh or twelfth aspect of the present invention, there is provided a connecting member for connecting an insert member formed of a material having a low coefficient of friction with a lubrication hole provided in a connecting rod. At least one of the hole and the connection groove is provided, and lubrication is performed smoothly,
The surface roughness of the sliding portion is improved, the coefficient of friction is reduced, and wear is less likely to occur.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A hermetic compressor according to an embodiment of the present invention will be described below with reference to the drawings.
Note that the same components as those of the related art are denoted by the same reference numerals, and description thereof is omitted.

(Embodiment 1) FIG. 1 is a cross-sectional view of a connecting rod of a hermetic compressor according to Embodiment 1 of the present invention.

In FIG. 1, reference numeral 1 denotes a coating material having a low coefficient of wear and a crankshaft 54 and a connecting rod 58.
And the sliding portions of the piston pin 59 and the connecting rod 58 are applied.

The operation of the hermetic compressor constructed as described above will be described below. The connecting rod 58 is driven by the crankshaft 54 rotated by the electric element 52.
Moves in the direction of compressing the cylinder bore 56, and the piston 57 moves via a piston pin 59 fitted in the connecting rod 58. At this time, the sliding portion between the crankshaft 54 and the connecting rod 58 and the sliding portion between the connecting rod 58 and the piston pin 59 have the low wear coefficient coating material 1 therebetween, so that the sliding portion is less likely to be worn.

(Embodiment 2) FIG. 2 is a sectional view of a connecting rod applied to a hermetic compressor according to Embodiment 2 of the present invention. In FIG. 2, reference numeral 2 denotes a cylindrical member having a low wear coefficient, which is disposed in close contact with the inner peripheral surface of the connecting rod 58 corresponding to the sliding part of the crankshaft 54 and the connecting rod 58 and the sliding part of the connecting rod 58 piston pin 59.

The operation of the hermetic compressor constructed as described above will be described below. The connecting rod 58 is driven by the crankshaft 54 rotated by the electric element 52.
Moves in the direction of compressing the cylinder bore 56, and the piston 57 moves via a piston pin 59 fitted in the connecting rod 58. At this time, the sliding portion between the crankshaft 54 and the connecting rod 58 and the sliding portion between the connecting rod 58 and the piston pin 59 are interposed by the low wear coefficient cylindrical member, so that the sliding portion is less likely to be worn.

(Embodiment 3) FIG. 3 is a perspective view of a cylindrical member applied to a hermetic compressor according to Embodiment 3 of the present invention. In FIG. 3, reference numeral 4 denotes a hole formed in the cylindrical portion of the cylindrical member 3, and also penetrates a groove 5 dug in the inner surface of the cylindrical member 3. The hole 4 does not necessarily have to be connected to the groove 5, but is preferably connected to the groove 5 from the viewpoint that lubrication is performed smoothly.

The operation of the hermetic compressor constructed as described above will be described below. The connecting rod 58 is driven by the crankshaft 54 rotated by the electric element 52.
Moves in the direction of compressing the cylinder bore 56, and the piston 57 moves via a piston pin 59 fitted in the connecting rod 58. At this time, the low wear coefficient cylindrical member 3 is interposed between the sliding portion between the crankshaft 54 and the connecting rod 58 and the sliding portion between the connecting rod 58 piston pin 59, and the refrigerating machine oil is supplied from the crankshaft 54 to the holes 4 and the grooves 5. As a result, the sliding portion is smoothly supplied to the sliding portion, so that the sliding portion is less likely to be worn.

(Embodiment 4) FIG. 4 is a perspective view of a connecting rod applied to a hermetic compressor according to Embodiment 4 of the present invention. FIG. 5 is a sectional view of a main part of a cylindrical member of a connecting rod applied to the hermetic-type compressor of the embodiment. FIG.
In FIG. 5, reference numeral 8 denotes a long fiber material made of, for example, carbon fiber and having a low coefficient of friction. ing.

The operation of the hermetic compressor constructed as described above will be described below. The connecting rod 58 is driven by the crankshaft 54 rotated by the electric element 52.
Moves in the direction of compressing the cylinder bore 56, and the piston 57 moves via a piston pin 59 fitted in the connecting rod 58. At this time, the low-wear coefficient cylindrical member 6 was interposed between the sliding portion between the crankshaft 54 and the connecting rod 58 and the sliding portion between the connecting rod 58 piston pin 59, and the refrigerating machine oil supplied from the crankshaft 54 was spirally wound. Since the sliding portion is smoothly supplied to the sliding portion from the gap of the collective wire 7, the sliding portion is less likely to be worn.

(Embodiment 5) FIG. 6 is a sectional view of a main part of a cylindrical member of a connecting rod applied to a hermetic compressor according to Embodiment 5 of the present invention. In FIG. 6, reference numeral 10 denotes a wire made of, for example, a spring material, which is covered with a coating material 9 having a low friction coefficient. The cylindrical member 11 is formed by forming the wire rod 10 into a spiral shape.

The operation of the hermetic compressor constructed as described above will be described below. The connecting rod 58 is driven by the crankshaft 54 rotated by the electric element 52.
Moves in the direction of compressing the cylinder bore 56, and the piston 57 moves via a piston pin 59 fitted in the connecting rod 58. At this time, the low wear coefficient cylindrical member 11 was interposed between the sliding portion between the crankshaft 54 and the connecting rod 58 and the sliding portion between the connecting rod 58 piston pin 59, and the refrigerating machine oil supplied from the crankshaft 54 was spirally wound. Since the sliding portion is smoothly supplied to the sliding portion from the gap of the wire rod 10, the sliding portion is less likely to be worn.

Embodiment 6 FIG. 7 is a perspective view of a connecting rod applied to a hermetic compressor according to Embodiment 6 of the present invention. FIG. 8 is a cross-sectional view of a connecting rod of the hermetic-type compressor of the embodiment. 7 and 8, reference numeral 12 denotes a connecting rod, which has a through-hole formed in a cylindrical member 14 having a low friction coefficient at both ends of a pipe 13 and is connected to the pipe.

The operation of the hermetic compressor constructed as described above will be described below. The connecting rod 58 is driven by the crankshaft 54 rotated by the electric element 52.
Moves in the direction of compressing the cylinder bore 56, and the piston 57 moves via a piston pin 59 fitted in the connecting rod 58. The connecting rod includes a pipe 13 and two cylindrical members 14. A through hole 14a for inserting the pipe 13 is formed in the cylindrical member 14, and the pipe 13 is fitted therein and fixed by welding or the like. At this time, since the low wear coefficient cylindrical member 14 is interposed between the sliding portion between the crankshaft 54 and the connecting rod 58 and the sliding portion between the connecting rod 58 and the piston pin 59, the sliding portion is less likely to be worn.

Further, since the hollow pipe 13 is used for connecting the cylindrical member 14, the weight is reduced, the power loss is reduced, and the lubrication of the sliding portion of the piston pin 59 is facilitated.

(Embodiment 7) FIG. 9 is a sectional view of a connecting rod of a hermetic compressor according to Embodiment 7 of the present invention.
In FIG. 9, the connecting rod 12 is composed of a pipe 13 and two cylindrical members 15. A through hole 15a for inserting the pipe 13 is opened in the cylindrical member, and the pipe 13 is fitted and fixed by welding or the like. Both are of the same material and need not have a low coefficient of friction. Numeral 16 denotes a coating material which coats at least the cylindrical member with a material having a low friction coefficient.

The operation of the hermetic compressor constructed as described above will be described below. The connecting rod 58 is driven by the crankshaft 54 rotated by the electric element 52.
Moves in the direction of compressing the cylinder bore 56, and the piston 57 moves via a piston pin 59 fitted in the connecting rod 58. Thus, the sliding portion between the crankshaft 54 and the connecting rod 58 and the connecting rod 58 piston pin 5
Since the low-wear coefficient cylindrical member 15 is interposed between the sliding portion 9 and the sliding portion, wear of the sliding portion hardly occurs.

(Eighth Embodiment) FIG. 10 is a sectional view of a main part of a connecting rod of a hermetic compressor according to an eighth embodiment of the present invention. In FIG. 10, reference numeral 16 denotes a screw portion provided in a through hole formed in a cylindrical member 18 having a low coefficient of friction with both ends of a pipe 17, and the pipe 17 and the cylindrical member 18 are fitted and connected by screwing.

The operation of the hermetic compressor constructed as described above will be described below. The connecting rod 58 is driven by the crankshaft 54 rotated by the electric element 52.
Moves in the direction of compressing the cylinder bore 56, and the piston 57 moves via a piston pin 59 fitted in the connecting rod 58. The connecting rod 12 is composed of a pipe 17 and two cylindrical members 18 having a low coefficient of wear. The cylindrical member 18 has a through hole for inserting the pipe 13, and both have a thread groove. The pipe 17 is a cylindrical member 1
8 and is fixed to the screw groove. As described above, since the low wear coefficient cylindrical member 18 is interposed between the sliding portion between the crankshaft 54 and the connecting rod 58 and the sliding portion between the connecting rod 58 and the piston pin 59, the sliding portion is less likely to be worn.

(Embodiment 9) FIG. 11 is a sectional view of a main part of a connecting rod of a hermetic compressor according to Embodiment 9 of the present invention. In FIG. 11, reference numeral 16 denotes a thread portion provided in a through hole formed in a cylindrical member 18 having a low coefficient of friction with both ends of the pipe 17, and the pipe 17 and the cylindrical member 18 are fitted and connected by screwing. At least the portion of the pipe that protrudes from the joint between the cylindrical member 18 and the pipe 17 is covered with the low-friction-coefficient material 20.

The operation of the hermetic compressor configured as described above will be described below. The connecting rod 58 is driven by the crankshaft 54 rotated by the electric element 52.
Moves in the direction of compressing the cylinder bore 56, and the piston 57 moves via a piston pin 59 fitted in the connecting rod 58. The connecting rod 12 includes a pipe 17 and two cylindrical members 19 having a low coefficient of wear. The cylindrical member 19 is provided with a through hole for inserting the pipe 17, and a thread groove is formed in both holes. The pipe 17 is a cylindrical member 1
9 and at least the portion of the pipe that protrudes from the joint between the cylindrical member 18 and the pipe 17 is covered with the low-friction-coefficient material 20.
The sliding portion is made of a material having a low friction coefficient, and the screw portion is made of a material having a low friction coefficient to prevent loosening. Thus, the sliding portion of the crankshaft 54 and the connecting rod 58 and the connecting rod 5
Low wear coefficient cylindrical member 1 in sliding part with 8 piston pin 59
Because of the interposition of 9, the sliding portion is less likely to be worn.

(Embodiment 10) FIG. 12 is a perspective view of a connecting rod of a hermetic compressor according to Embodiment 10 of the present invention. In FIG. 12, reference numeral 21 denotes a connecting rod composed of a pipe 13 and two cylindrical members 15. A through hole for inserting the pipe 13 is formed in the cylindrical member, and the pipe is fitted and fixed by welding or the like. And the whole is covered with a molding material having a low coefficient of friction.

The operation of the hermetic compressor constructed as described above will be described below. The connecting rod 21 is rotated by the crankshaft 54 rotated by the electric element 52.
Moves in the direction of compressing the cylinder bore 56, and the piston 57 moves via a piston pin 59 fitted in the connecting rod 58. The connecting rod 21 is composed of two cylindrical members 15 having a low coefficient of wear. Thus, the sliding portion of the crankshaft 54 and the connecting rod 58 and the connecting rod 5
Low wear coefficient cylindrical member 1 in sliding part with 8 piston pin 59
Because of the interposition, wear of the sliding portion hardly occurs.

(Embodiment 11) FIG. 13 is a perspective view of a connecting rod of a hermetic compressor according to Embodiment 11 of the present invention. In FIG. 13, reference numeral 22 denotes a connecting rod, and reference numeral 23 denotes an insert member made of a low wear coefficient material.

The operation of the hermetic compressor configured as described above will be described below. The connecting rod 22 is rotated by the crankshaft 54 rotated by the electric element 52.
Moves in the direction of compressing the cylinder bore 56, and the piston 57 moves via the piston pin 59 fitted in the connecting rod 22. An insert member 23 having a low wear coefficient is fitted into the connecting rod 22, and the low wear coefficient insert member 23 is interposed between a sliding portion between the crankshaft 54, the connecting rod 22 and the connecting rod 22 piston pin 59. The moving parts are less likely to be worn.

(Twelfth Embodiment) FIG. 14 is a perspective view of a connecting rod of a hermetic compressor according to a twelfth embodiment of the present invention. In FIG. 14, reference numeral 24 denotes a connecting rod, and reference numeral 25 denotes an insert member made of a low wear coefficient material.

The operation of the hermetic compressor configured as described above will be described below. The connecting rod 24 is rotated by the crankshaft 54 rotated by the electric element 52.
Moves in the direction of compressing the cylinder bore 56, and the piston 57 moves via a piston pin 59 fitted in the connecting rod 24. An insert member 25 having a low wear coefficient is fitted into the connecting rod 24, and the low wear coefficient insert member 25 is interposed between the sliding portion of the crankshaft 54, the connecting rod 24, and the sliding portion of the connecting rod 24 and the piston pin 59. Abrasion of the sliding portion hardly occurs.

(Thirteenth Embodiment) FIG. 15 is a sectional view of a connecting rod of a hermetic compressor according to a thirteenth embodiment of the present invention. In FIG. 15, reference numeral 24 denotes a connecting rod, and reference numeral 25 denotes an insert member made of a low wear coefficient material. The insert member 25 has a connection hole 26 and a connection groove 27 connected to the oil supply hole 60.

The operation of the hermetic compressor constructed as described above will be described below. The connecting rod 24 is rotated by the crankshaft 54 rotated by the electric element 52.
Moves in the direction of compressing the cylinder bore 56, and the piston 57 moves via a piston pin 59 fitted in the connecting rod 24. An insert material 25 having a low wear coefficient is fitted into the connecting rod 24, and the refrigerating machine oil 61 is easily supplied through the hole 26 and the groove 27 connected to the oil supply hole 60 of the connecting rod 24. Since the refrigerating machine oil 61 is supplied to the sliding portion between the crankshaft 54 and the connecting rod 24 and the sliding portion between the connecting rod 24 and the piston pin 59 via the low wear coefficient insert material 25, the sliding portion is less likely to be worn.

[0051]

As described above, the first aspect of the present invention provides a compression element elastically supported in a closed container, an electric element, a crankshaft fixed to a rotor of the electric element, A cylinder bore portion of the compression element, a piston that slides in the cylinder bore portion, a connecting rod that transmits rotation of the crankshaft to the piston, and a piston pin that connects the connecting rod and the piston, wherein the crankshaft and the piston Since a coating material having a low coefficient of friction is provided on at least one of the pins and the sliding portion of the connecting rod, wear of the sliding portion can be reduced, and the life of the hermetic compressor can be extended.

According to a second aspect of the present invention, there is provided a compression element elastically supported in a closed container, an electric element, a crankshaft fixed to a rotor of the electric element, and a cylinder bore of the compression element. A piston that slides in the cylinder bore, a connecting rod that transmits rotation of the crankshaft to the piston, and a piston pin that connects the connecting rod and the piston, wherein at least one of the crankshaft and the piston pin and Since a cylindrical member formed of a material having a low coefficient of friction is provided on the sliding portion of the connecting rod, wear of the sliding portion can be reduced, and the life of the hermetic compressor can be extended.

The invention described in claim 3 is the same as the invention described in claim 2
In the invention described in the above, furthermore, a hole is formed through the outer peripheral surface and the inner peripheral surface of the cylindrical member, and a groove is arranged on the inner peripheral surface, so that refrigerating machine oil can be easily supplied and wear of the sliding portion is reduced. The life of the hermetic compressor can be extended.

The invention described in claim 4 is the same as the invention described in claim 2.
In the invention described in the above, since a cylindrical member formed by shaping a long fiber material having a low coefficient of friction into a spiral cylinder is provided, the supply of refrigerating machine oil can be facilitated, the wear of sliding parts can be reduced, and the hermetic compressor Life can be extended.

The invention described in claim 5 is the same as the invention described in claim 2.
In the invention described in the above, since the surface of the cylindrical member formed by forming the wire into a helical cylinder is coated with a material having a low friction coefficient, the supply of the refrigerating machine oil can be facilitated, the wear of the sliding portion can be reduced, and the hermetic compression You can extend the life of the machine.

The invention according to claim 6 is the same as the invention according to claim 2.
In the invention described in the above, since a connecting rod provided with a pipe and a low-friction-coefficient cylindrical member having through-holes for inserting the pipe at both ends of the pipe is provided,
It can be simplified to three parts, the material suitable for the sliding part can be partially used, the surface processing becomes easy, the wear of the sliding part can be reduced, and the life of the hermetic compressor can be extended. Further, by using a pipe for connecting the cylindrical members, weight reduction can be achieved.

The invention according to claim 7 is the same as the invention according to claim 6.
In the invention described in the above, since the pipe and the cylindrical member are made of the same material, and the cylindrical member is covered with a coating material having a low friction coefficient, the wear of the sliding portion can be reduced, and the life of the hermetic compressor can be extended. I can do it.

Further, the invention described in claim 8 is the same as claim 6.
According to the seventh aspect of the present invention, since the pipe and the cylindrical member are screwed together, the wear of the sliding portion can be reduced without affecting the inner surface processing of the cylindrical member, and the life of the hermetic compressor is extended. Can be done.

The invention according to claim 9 is the same as the invention according to claim 8.
In the invention described in the above, since at least the connection between the pipe and the cylindrical portion is covered with a material having a low friction coefficient, it is possible to easily supply the refrigerating machine oil and reduce the wear of the sliding portion, and to shorten the life of the hermetic compressor. Can be extended.

According to a tenth aspect of the present invention, there is provided a compression element elastically supported in a closed container, an electric element, a crankshaft fixed to a rotor of the electric element, and a cylinder bore of the compression element. A piston sliding in the cylinder bore portion, a connecting rod for transmitting rotation of the crankshaft to the piston, and a piston pin connecting the connecting rod and the piston, wherein the connecting rod is coated with a resin material having a low coefficient of friction. Since it is formed of the composite material, the supply of the refrigerating machine oil can be facilitated, the wear of the sliding portion can be reduced, and the life of the hermetic compressor can be extended.

[0061] Further, according to the present invention, a compression element elastically supported in a closed container, an electric element, a crankshaft fixed to a rotor of the electric element, and a cylinder bore of the compression element. A piston that slides in the cylinder bore, a connecting rod that transmits rotation of the crankshaft to the piston, and a piston pin that connects the connecting rod and the piston, wherein at least one of the crankshaft and the piston pin and Since an insert member with a low coefficient of friction is arranged on the sliding part of the connecting rod, it is possible to arrange the low friction coefficient member efficiently while ensuring the structural stability of the connecting rod, reduce the wear of the sliding part, and achieve a sealed type. The life of the compressor can be extended.

According to a twelfth aspect of the present invention, in the eleventh aspect, an insert member having a low friction coefficient is provided on a semicircular portion on a piston pin side in a sliding portion of a crankshaft. In the sliding portion of the piston pin, since it is arranged on the semicircular portion on the crankshaft side, it is possible to arrange the minimum necessary friction coefficient member, and it is possible to reduce the wear of the sliding portion rationally, The life of the hermetic compressor can be extended.

According to a thirteenth aspect of the present invention, in addition to the eleventh or twelfth aspect, an insert member formed of a material having a low coefficient of friction is connected to a lubrication hole provided in a connecting rod. Since at least one of the connection hole and the connection groove is provided, the supply of the refrigerating machine oil can be facilitated, the wear of the sliding portion can be reduced, and the life of the hermetic compressor can be extended.

[Brief description of the drawings]

FIG. 1 is a sectional view of a connecting rod of a hermetic compressor according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a connecting rod of a hermetic compressor according to a second embodiment of the present invention.

FIG. 3 is a perspective view of a main part of a connecting rod of a hermetic compressor according to a third embodiment of the present invention.

FIG. 4 is a sectional view of a main part of a connecting rod of a hermetic compressor according to a fourth embodiment of the present invention.

FIG. 5 is an essential part cross-sectional view of a connecting rod of the hermetic-type compressor of the embodiment.

FIG. 6 is a sectional view of a main part of a connecting rod of a hermetic compressor according to a fifth embodiment of the present invention.

FIG. 7 is a perspective view of a connecting rod of a hermetic compressor according to a sixth embodiment of the present invention.

FIG. 8 is an essential part cross-sectional view of a connecting rod of the hermetic compressor of the embodiment.

FIG. 9 is a sectional view of a connecting rod of a hermetic compressor according to a seventh embodiment of the present invention.

FIG. 10 is a sectional view of a main part of a connecting rod of a hermetic compressor according to an eighth embodiment of the present invention.

FIG. 11 is a sectional view of a main part of a connecting rod of a hermetic-type compressor according to a ninth embodiment of the present invention.

FIG. 12 is a perspective view of a connecting rod of a hermetic compressor according to a tenth embodiment of the present invention.

FIG. 13 is a perspective view of a connecting rod of a hermetic compressor according to an eleventh embodiment of the present invention.

FIG. 14 is a perspective view of a connecting rod of a hermetic compressor according to a twelfth embodiment of the present invention.

FIG. 15 is a sectional view of a connecting rod of a hermetic compressor according to a thirteenth embodiment of the present invention.

FIG. 16 is a sectional view of a conventional hermetic compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coating material 2 Cylindrical member 4 Hole 5 Groove 8 Long fiber material 10 Wire rod 13 Pipe 14 Cylindrical member 16 Screw part 23 Insert member 26 Connection hole 27 Connection groove 50 Sealed container 51 Compression element 52 Electric element 53 Rotor 54 Crankshaft 55 Bearing 56 Cylinder bore part 57 Piston 58 Connecting rod 59 Piston pin

Claims (13)

[Claims] 1. A compression element elastically supported in a closed container, an electric element, a crankshaft fixed to a rotor of the electric element, a cylinder bore of the compression element,
A piston that slides in the cylinder bore portion, a connecting rod that transmits rotation of the crankshaft to the piston, and a piston pin that connects the connecting rod and the piston; at least one of the crankshaft and the piston pin and the connecting rod A hermetic compressor characterized in that a sliding portion is provided with a coating material having a low coefficient of friction. 2. A compression element elastically supported in a closed container, an electric element, a crankshaft fixed to a rotor of the electric element, a cylinder bore of the compression element,
A piston that slides in the cylinder bore portion, a connecting rod that transmits rotation of the crankshaft to the piston, and a piston pin that connects the connecting rod and the piston; at least one of the crankshaft and the piston pin and the connecting rod A hermetic compressor characterized by having a cylindrical member formed of a material having a low friction coefficient on a sliding portion. 3. The hermetic compressor according to claim 2, wherein a hole is formed through the outer peripheral surface and the inner peripheral surface of the cylindrical member, and a groove is provided in the inner peripheral surface. 4. The hermetic compressor according to claim 2, wherein a cylindrical member formed by shaping a long fiber material having a low coefficient of friction into a helical cylinder is provided. 5. The hermetic compressor according to claim 2, wherein a material having a low coefficient of friction is coated on a surface of a cylindrical member formed by forming a wire into a helical cylinder. 6. A hermetic compression machine according to claim 2, further comprising a connecting rod having a pipe and a low friction coefficient cylindrical member having through holes for inserting said pipe at both ends of said pipe. Machine. 7. The hermetic compressor according to claim 6, wherein the pipe and the cylindrical member are made of the same material, and the cylindrical member is covered with a coating material having a low coefficient of friction. 8. The hermetic compressor according to claim 6, wherein the pipe and the cylindrical member are screwed. 9. The hermetic compressor according to claim 8, wherein at least a connection between the pipe and the cylindrical portion is covered with a material having a low coefficient of friction. 10. A compression element elastically supported in a closed container, an electric element, a crankshaft fixed to a rotor of the electric element, a cylinder bore of the compression element,
A composite including a piston sliding in the cylinder bore, a connecting rod for transmitting rotation of the crankshaft to the piston, and a piston pin connecting the connecting rod and the piston, wherein the connecting rod is coated with a resin material having a low friction coefficient. A hermetic compressor characterized by being formed of a material. 11. A compression element elastically supported in a closed container, an electric element, a crankshaft fixed to a rotor of the electric element, a cylinder bore of the compression element,
A piston sliding in the cylinder bore portion, a connecting rod for transmitting rotation of the crankshaft to the piston, and a piston pin connecting the connecting rod and the piston; at least one of the crankshaft and the piston pin and the connecting rod A hermetic compressor characterized in that an insert member having a low coefficient of friction is arranged on a sliding portion. 12. An insert member having a low coefficient of friction is provided on a semicircular portion on a piston pin side in a sliding portion of a crankshaft, and a semicircular portion on a crankshaft side in a sliding portion of a piston pin. The hermetic compressor according to claim 11, wherein the hermetic compressor is disposed in a section. 13. An insert member formed of a material having a low friction coefficient, wherein at least one of a connection hole and a connection groove connected to an oil supply hole provided in the connecting rod is provided. A hermetic compressor according to item 1.