JPH08200267A - Oil pump structure for closed type compressor - Google Patents

Abstract

PURPOSE: To improve assembly workability of a compressor by forming an oil take out pipe, in a condition that its one end side is taken out to the outside from a take out hole of a cover part casing, left as connected to a pump receiving part provided in the cover part casing, when the compressor is assembled. CONSTITUTION: In a closed type compressor provided with an oil pump 3 of taking out oil of an oil reservoir 10 formed inside a casing 1 to its outside in an end part of a drive shaft 21 of a motor 2 internally mounted in the closed casing 1, when the compressor is assembled, before assembling a cover part casing 1b in a barrel part casing 1a, first an oil take out pipe 5 is place in a condition that its one end side is taken out to the outside from a take out hole 14 of the cover part casing 1b, and the oil take out pipe is left as connected to a pump receiving part 4a provided in the cover part casing 1b. Next, the barrel part casing 1a, built in with the motor 2, oil pump 3, etc., is assembled in the cover part casing 1b, here to perform assembling the compressor by inserting a pump case 30 fitted to the pump receiving part 4a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil pump structure provided at an end of a drive shaft which constitutes a hermetic compressor.

[0002]

2. Description of the Related Art Generally, a hermetic compressor has a hermetic casing having a body casing and a lid casing assembled to an end portion of the body casing. A motor for driving the compression element and the like is built in, an oil sump is provided in the inner bottom portion of the closed casing, and an oil pump for pumping the oil in the oil sump is provided at the end of the drive shaft of the motor.

By the way, the applicant of the present application has previously proposed, in the above hermetic compressor, a structure in which the oil pumped by the oil pump is taken out to the outside of the hermetic casing (Japanese Patent Application No. 6-147302). ). That is, this compressor has a closed casing A as shown schematically in FIG.
While the pump case D of the oil pump C is fixed to the support housing B assembled in the body casing A1 which constitutes the above, the separately formed oil take-out pipe E is formed from the outside of the closed casing A to form the closed casing A. Cover casing A
2 is inserted into the closed casing A through a mounting hole F formed in 2, and the insertion end is press-fitted to an oil outlet G opened on the outer surface of the pump case D.
The oil pumped by the oil pump C is taken out to the outside of the closed casing A via the.

[0004]

By the way, the oil take-out pipe E
In the above-mentioned structure in which the oil pumped by the oil pump C is taken out to the outside of the closed casing A via
When connecting the oil take-out pipe E to the pump case D,
One end in the length direction of the oil take-out pipe E is sealed from the outside of the closed casing A by assembling the lid casing A2 to the body casing A1 and through a mounting hole F formed in the lid casing A2. Since it is necessary to insert the oil pump C into the closed casing A and press the insertion end into the oil outlet G of the pump case D, when the oil pump C is assembled in the casing, the oil outlet G is The sealing casing A must be assembled so as to match the mounting hole F of the lid casing A2, and the inside of the closed casing A is closed by the body casing A1 and the lid casing A2. Oil take-out pipe E inserted in casing A
Since the insertion end of the above can not be seen from the outside, it is very difficult to press-fit the oil take-out pipe E into the oil take-out hole G, and therefore it is difficult to perform the assembling work of the compressor as a whole.

The present invention has been developed in view of the above circumstances, and an object thereof is to provide an oil pump structure of a hermetic compressor which is easy to assemble.

[0006]

According to the first aspect of the present invention,
Oil for extracting the oil in the oil sump (10) formed inside the casing (1) to the outside of the casing (1) at the end of the drive shaft (21) of the motor (2) installed in the closed casing (1). In a hermetic compressor provided with a pump (3), a body casing (1a) accommodating the motor (2) and the oil pump (3) and an end of the body casing (1a) are fitted. A pump receiving part (1) having a closed casing (1) provided with a lid casing (1b), and allowing the pump case (30) of the oil pump (3) to be fitted into the lid casing (1b). 4a) and the pump receiving part (4
a) is provided with an oil take-out pipe (5) connected to the oil take-out port (31) of the pump case (30) so as to be able to communicate therewith, and the oil take-out pipe (5) is connected to the lid casing (1b). It was taken out through the take-out hole (14).

According to a second aspect of the invention, the pump receiving portion (4
a) is formed into a tubular shape into which the pump case (30) can be fitted, and an oil outlet (3) is formed on the outer peripheral surface of the pump case (30).
1) is opened, and a seal ring (34) is located vertically between the oil receiving port (31) and the inner peripheral surface of the pump receiving portion (4a) and the outer peripheral surface of the pump case (30).
According to the invention of claim 3, the pump receiving portion (4a) is formed into a cylindrical shape into which the pump case (30) can be inserted, and the oil collecting portion is provided on the outer peripheral surface of the pump case (30). The outlet (31) is opened and the pump case (3
The annular groove (32) having the oil outlet (31) opened is formed on the outer peripheral surface of (0).

Further, in the invention according to claim 4, the pump receiving portion (4a) comprises an oil take-out cover (4) fixed to the lid casing (1b) through the mounting portion (4b). The mounting portion (4b) of (4) is formed so as to face the end surface of the body casing (1a), and an engaging portion (13) for receiving the mounting portion (4b) is formed on the inner surface of the lid casing (1b). By forming and sandwiching the end surface of the body casing (1a) of the mounting portion (4b) and the engaging portion (13) of the lid casing (1b), the oil extraction cover (4) is attached to the lid casing. It was fixed to (1b).

According to a fifth aspect of the present invention, the pump receiving portion (4a) and the mounting portion (4b) of the oil removal cover (4) are provided.
The support portions (4c) are connected by a plurality of support portions (4c) extending in the radial direction.
On the other hand, the concave portion (43) for reinforcement was formed.

Further, in the invention of claim 7, the oil take-out pipe (5) is connected to the small-diameter oil take-out pipe (5a) connected to the pump receiving portion (4a) and the small-diameter oil take-out pipe (5a). ,
Large-diameter oil extraction pipe (5) connected to the lid casing (1b)
and the small diameter oil take-out pipe (5a) and the large diameter oil take-out pipe (5b).
And were connected by screwing.

[0011]

According to the first aspect of the present invention, during assembly of the compressor, the body casing 1a is covered by the lid casing 1b.
Before assembling, the oil take-out pipe 5 is connected to a pump receiving 4a provided in the lid casing 1b with one end side thereof taken out from the take-out hole 14 of the lid casing 1b. After that, the body casing 1a in which the motor 2 and the oil pump 3 and the like are incorporated is assembled to the lid casing 1b, and at the time of this assembly, the pump case 30 of the oil pump 3 is attached to the pump receiving portion 4a. The compressor can be assembled by inserting it into.

According to the second aspect of the present invention, the seal ring 3 provided at the upper and lower positions with respect to the oil take-out port 31 is merely required by inserting the pump case 30 into the cylindrical pump receiving portion 4a.
4, it is possible to seal the connection portion between the oil outlet 31 and the communication passage 41.

According to the third aspect of the present invention, when the pump case 30 is inserted into the cylindrical pump receiving portion 4a, even if the oil outlet 31 does not coincide with the communication passage 41, The oil outlet 31 can be communicated with the communication passage 41 via the annular groove 32.

According to the fourth aspect of the present invention, the mounting portion 4b of the oil removal cover 4 is connected to the engaging portion 1 of the lid casing 1b.
3, the mounting portion 4b of the oil take-out cover 4 can be fitted to the end surface of the body casing 1a and the lid casing by simply fitting the lid casing 1b onto the outer periphery of the end of the body casing 1a. Since it is sandwiched and fixed by the engaging portion 13 of 1b, the pump receiving portion 4a can be easily fixed to the lid casing 1b.

According to the fifth aspect of the present invention, since the pump receiving portion 4a and the mounting portion 4b of the oil extraction cover 4 are connected only by the plurality of support portions 4c, the weight of the oil extraction cover 4 can be reduced. Moreover, for example, the lubricating oil flowing down from the compression element side when the compressor is driven can be smoothly returned to the oil sump 10 through the gap between the support portions 4.

According to the sixth aspect of the invention, the pump receiving portion 4a and the mounting portion 4b are connected to each other by the supporting portion 4c to reduce the weight of the oil take-out cover 4. It is raised by the recess 43.

According to the invention described in claim 7, when the pump receiving portion 4a is mounted in the lid casing 1b, the free end of the small diameter oil take-out pipe 5a connected to the pump receiving portion 4a is replaced with the large diameter oil. It can be easily inserted into the take-out hole 14 of the lid casing 1b that is sized to receive the take-out pipe 5b, and the large-diameter oil take-out pipe can be attached to the free end of the small-diameter oil take-out pipe 5a inserted into the mounting hole 14. 5b can be connected to easily take out the oil take-out pipe 5 to the outside of the lid casing 1b.

According to the invention as set forth in claim 8, by simply screwing the large-diameter oil take-out pipe 5b to the small-diameter oil take-out pipe 5a, the two take-out pipes 5a and 5b can be easily connected, and the oil The work of assembling the take-out pipe 5 to the lid casing 1b becomes easy.

[0019]

1 shows a hermetic scroll compressor which employs an oil pump structure according to the present invention. The compressor is a cylindrical casing 1a and a casing 1a. And an upper lid casing (not shown) that closes the upper end opening, and a lower lid casing 1b that closes the lower end opening of the body casing 1a. An oil sump 10 is provided at the inner bottom. A hermetic casing 1 is provided, and a scroll-type compression element (not shown) is internally provided in the body casing 1a of the hermetic casing 1, and a motor 2 having a drive shaft 21 coupled below the compression element. , A support housing 20 for supporting a pump case 30 of an oil pump 3 described later is fixed, and a suction pipe (not shown) connected to the closed casing 1 is driven by driving the motor 2. Gas, incorporation into the compression chamber of the compression element, the discharged gas after compression, is from the discharge pipe connected to the closed casing 1 (not shown) of known construction which they were taken out to the outside.

An oil pump 3 having two pump mechanisms is provided at the lower end of the drive shaft 21, and the lubricating oil pumped by one pump mechanism is supplied to an oil supply passage provided inside the drive shaft 21. On the other hand, the lubricating oil pumped up by the other pump mechanism is transferred from the oil outlet 31 that opens to the outer peripheral surface of the pump case 30 of the oil pump 3 through the oil outlet pipe 5 described later that communicates with the oil outlet 31. It is designed to be taken out of the closed casing 1.

In the hermetic compressor having the above construction, however, in the embodiment shown in FIG. 1, the lid casing 1b is composed of the bottom wall 11 and the cylindrical cylindrical wall 12 rising from the outer periphery of the bottom wall 11. And a stepped shape capable of bulging the upper end opening of the cylindrical wall 12 outward in the radial direction and receiving the mounting portion 4b of the oil extraction cover 4 described later on the inner peripheral surface of the upper end opening of the cylindrical wall 12. On the other hand, while surrounding the engaging portion 13 of the above, the oil extraction cover 4 having the pump receiving portion 4a into which the pump case 30 can be inserted and fitted and the attaching portion 4b to the lid casing 1b is separately formed. .

Specifically, as shown in FIGS. 3 and 4,
The pump receiving portion 4a of the oil take-out cover 4 is formed in a cylindrical shape into which the pump case 30 can be inserted, and at the upper end portion of the pump receiving portion 4a, three supports extending outward in the radial direction are provided. The portions 4c are radially extended to support these support portions 4
An annular connecting end of the radial direction outer side of c that is mountable on the engaging portion 13 provided on the lid casing 1b facing the lower end surface of the body casing 1a and that connects the supporting portions 4c. Around the mounting portion 4b, and at the time of assembling the lower end portion of the body portion casing 1a to the lid portion casing 1b by fitting, the mounting portion 4b placed on the engaging portion 13 The lower end surface of the partial casing 1a and the engaging portion 13 are sandwiched between them, so that the oil extraction cover 4 is fixed to the closed casing 1.

As shown in FIG. 2, a circular hole is formed in the pump receiving portion 4a of the oil take-out cover 4, and the circular hole can communicate with the oil take-out port 31 of the pump case 30. In addition to the above, a cylindrical connecting tubular portion 42 protruding outward in the radial direction is provided on the outer surface of the pump receiving portion 4a and around the communication passage 41, and the cylindrical connecting tubular portion 42 is provided through the connecting tubular portion 42. While connecting the oil take-out pipe 5 to the communication passage 41, as shown in FIGS. 3 and 4, a reinforcing recess 43 is formed in the bottom wall of each of the support portions 4c.

The oil take-out pipe 5 is connected to the pump receiving portion 4a via the connecting tube portion 42 and has a small diameter oil take-out pipe 5a.
And a large-diameter oil take-out pipe 5b connected to one end of the small-diameter take-out pipe 5a and connected and fixed to the lid casing 1b. The small-diameter oil take-out pipe 5a and the large-diameter oil take-out pipe 5b are screwed together. The connection is made by tightening.

Specifically, the outer diameter of the small-diameter oil take-out pipe 5a is made smaller than the inner diameter of the take-out hole 14 formed in the cylindrical wall 12 of the lid casing 1b by one size to make the small-diameter oil take-out pipe 5a. Of the small-diameter oil take-out pipe 5a. The small-diameter oil take-out pipe 5a is tightly fitted to the outer periphery of the connecting cylinder part 42 at the opening in the lengthwise one end side thereof, and then the small-diameter oil take-out pipe 5a is taken out. A male screw 51 for fixing the pipe 5a to the outer surface of the pump receiving portion 4a by brazing and screwing the large-diameter oil extracting pipe 5b to the outer periphery of the other end portion in the length direction of the small-diameter oil extracting pipe 5a. Are laid around.

Further, the large-diameter oil take-out pipe 5b has a female screw 52, which can be screwed into a male screw 51 formed on the small-diameter oil take-up pipe 5a, on the inner peripheral surface of one end in the lengthwise direction thereof. A cylindrical shaft portion 53 that can be inserted into the extraction hole 14 is provided at one end in the length direction of the large diameter oil extraction pipe 5b.

On the other hand, as shown in FIGS. 1 and 2, an annular groove 32 is provided around the outer peripheral surface of the pump case 30, and the oil outlet 31 is opened at the inner bottom of the annular groove 32. The outer peripheral surface of the pump case 30 and the annular groove 3
An annular recessed groove 33 is provided above and below 2 and a seal ring 34 made of synthetic rubber is fitted into the recessed groove 33.

Thus, in order to assemble the hermetic compressor having the above structure, first, the connecting cylinder portion 42 in which the opening in the lengthwise one end side of the small-diameter oil take-out pipe 5a is projected from the pump receiving portion 4 is formed. The small diameter oil take-out pipe 5a is fixed to the outer surface of the pump receiving portion 4a by brazing.

As described above, the small-diameter oil take-out pipe 5a
Mounting part 4b of the oil take-out cover 4 assembled in advance
Is mounted on the engaging portion 13 provided on the cylindrical wall 12 of the lid casing 1b, and the free end portion of the small diameter oil take-out pipe 5a is loosely inserted into the take-out hole 14 to remove the oil. While setting the cover 4 in the lid casing 1b,
The free end of the small-diameter oil take-out pipe 5a is projected to the outside of the lid casing 1b. In the above embodiment, the outer diameter of the small-diameter oil take-out pipe 5a is smaller than the inner diameter of the take-out hole 14. Since it is small, the work of inserting the free end of the small-diameter oil take-out pipe 5a into the take-out hole 14 can be easily performed.

From the outside of the cylinder wall 12, the cylinder shaft portion 53 of the large-diameter oil take-out pipe 5b is inserted into the take-out hole 14, and the female screw 52 formed in the large-diameter oil take-out pipe 5b.
Is screwed onto the male screw 51 formed on the small-diameter oil take-out pipe 5a to connect the large-diameter oil take-out pipe 5b to the small-diameter oil take-out pipe 5a, and then the large-diameter oil take-out pipe 5b is attached to the cylindrical wall 12. It is fixed by welding.

On the other hand, the compression element, the motor 2 and the support housing 20 are assembled in the body casein 1a,
The pump case 30 is provided under the support housing 20.
And the pump case 30 is inserted into the pump receiving portion 4a of the oil take-out cover 4 set in the lid casing 1b.
The lower end of a is the cylindrical wall 1 in the lid casing 1b.
2 is fitted into the inner circumference of the upper end opening of the body casing 1
With the lower end surface of a and the engaging portion 13, the oil extraction cover 4
The mounting portion 4b is clamped to fix the oil extraction cover 4 to the lid casing 1b, and then the joint portion between the body casing 1a and the lid casing 1b is welded.

Thus, by inserting the pump case 30 into the pump receiving portion 4a, the oil take-out port 31 is
The seal ring 34 communicates with the communication passage 41 of the pump receiving portion 4a through the annular groove 32, and
The upper and lower positions of the annular groove 32 seal between the outer peripheral surface of the pump case 30 and the inner peripheral surface of the pump receiving portion 4a,
The oil never leaks.

By the way, in the above embodiment, since the annular groove 32 is formed on the outer peripheral surface of the pump case 30 and the oil outlet 31 is opened at the inner bottom portion of the annular groove 32, the pump case 30. Even if the oil outlet 31 does not coincide with the opening of the communication passage 41 due to the insertion of the oil into the pump receiving portion 4a, the oil outlet 31 is inserted into the communication passage 41 via the annular groove 32. Always in communication.

The oil outlet 31 may be directly opposed to the communication passage 41 without forming the annular groove 32 in the pump case 30.

In the above embodiment, the pump receiving portion 4a and the mounting portion 4b of the oil extraction cover 4 extend in the radial direction 3
Since it is connected only by the book support portion 4c, the oil take-out cover 4 becomes light in weight, and the lubricating oil flows down from the side of the compression element disposed above the oil take-out cover 4 when the compressor is driven. The oil can be smoothly returned to the oil sump 10 through the gap between the supporting portions 4c, and yet the reinforcing recess 43 formed in the supporting portion 4c can reduce the weight of the oil as described above. The rigidity of the take-out cover 4 is enhanced.

In the above embodiment, the oil receiving cover 4 is formed by connecting the pump receiving portion 4a and the mounting portion 4b by the supporting portion 4c. However, without providing the mounting portion 4b and the supporting portion 4c, The pump receiving portion 4a may be directly assembled to the lid casing 1b, or the pump receiving portion 4a may be integrally formed with the lid casing 1b. When integrally formed with the partial casing 1b, the number of parts can be reduced.

[0037]

As described above, according to the invention as set forth in claim 1, at the time of assembling the compressor, before assembling the lid casing 1b to the body casing 1a, the oil take-out pipe 5 has one end side thereof The body part in which the motor 2, the oil pump 3 and the like are incorporated by connecting to the pump receiving 4a provided in the lid casing 1b in a state of being taken out from the take-out hole 14 of the lid casing 1b. Casing 1a
When the oil pump 3 is assembled to the lid casing 1b, the compressor to which the oil take-out pipe 5 is connected can be assembled only by inserting the pump case 30 of the oil pump 3 into the pump receiving portion 4a. As described above, it is not necessary to connect the oil take-out pipe from the outside of the assembled closed casing to the pump case in the closed casing, and the workability of assembling the compressor is improved as a whole.

According to the second aspect of the present invention, the pump receiving portion 4a is formed in a tubular shape into which the pump case 30 can be fitted, and the oil outlet 31 is opened on the outer peripheral surface of the pump case 30. By providing the seal rings 34 above and below the oil outlet 31 between the inner peripheral surface of the pump receiving portion 4a and the outer peripheral surface of the pump case 30, the pump case 30 is inserted into the pump receiving portion 4a. Only by fitting, the connection portion between the oil outlet 31 and the communication passage 41 can be easily sealed by the seal ring 34.

According to the third aspect of the invention, the oil outlet 31 is opened on the outer peripheral surface of the pump case 30, and the annular groove 32 is formed on the outer peripheral surface of the pump case 30 to which the oil outlet 31 is opened. Therefore, when the pump case 30 is inserted into the tubular pump receiving portion 4a, it is not necessary to align the oil outlet 31 with the communication passage 41, and the assembling workability is good. Become.

According to the fourth aspect of the invention, the pump receiving portion (4a) comprises an oil extraction cover (4) fixed to the lid casing (1b) via the mounting portion (4b), and the lid casing An engagement portion 13 that receives the mounting portion 4b is formed on the inner surface of the mounting portion 4b, and the end surface of the body portion casing 1a of the mounting portion 4b and the engagement portion 13 of the lid portion casing 1b are sandwiched between the engagement portion 13 and the oil removal cover. 4 is fixed to the lid casing 1b, so that the mounting portion 4
The pump receiving portion 4a can be easily fixed to the lid casing 1b simply by mounting b on the engaging portion 13 and fitting the lid casing 1b on the outer periphery of the end of the body casing 1a. You can do it.

According to the fifth aspect of the present invention, the pump receiving portion 4a and the mounting portion 4b of the oil extraction cover 4 are connected only by the plurality of supporting portions 4c, so that the weight of the oil extraction cover 4 can be reduced. Of course, for example, the lubricating oil that flows down from the compression element side when the compressor is driven can be smoothly returned to the oil sump 10 via the gap between the support portions 4.

According to the sixth aspect, since the reinforcing recess 43 is formed in the support portion 4c, it is possible to increase the rigidity of the oil extraction cover 4 which is made lightweight.

According to the invention of claim 7, the oil take-out pipe 5
A small-diameter oil take-out pipe 5a connected to the pump receiving portion 4a.
And the small-diameter oil take-out pipe 5a, and the lid casing 1
Since it is formed by a large-diameter oil take-out pipe 5b connected to b, the pump receiving portion 4a is provided in the lid casing 1b.
When mounting, the take-out hole 1 of the lid casing 1b is sized to receive the large-diameter oil take-out pipe 5b at the free end of the small-diameter oil take-out pipe 5a connected to the pump receiving part 4a.
4 can be easily inserted, and the large-diameter oil take-out pipe 5 can be attached to the free end of the small-diameter oil take-out pipe 5a inserted in the mounting hole 14.
By connecting b, the oil take-out pipe 5 can be easily taken out to the outside of the lid casing 1b.

According to the invention as set forth in claim 8, the small-diameter oil take-out pipe 5a and the large-diameter oil take-out pipe 5b are connected by screwing, so that the large-diameter oil take-out pipe 5b is connected to the small-diameter oil take-out pipe. Both extraction tubes 5
Since a and 5b can be connected, the work of assembling the oil take-out pipe 5 to the lid casing 1b becomes easy.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a hermetic compressor adopting an oil pump structure according to the present invention with a part thereof omitted.

FIG. 2 is an enlarged cross-sectional view of the main part of the same.

FIG. 3 is a plan view of an oil extraction cover.

FIG. 4 is a sectional view taken along line XX in FIG.

FIG. 5 is a sectional view of a main part of a hermetic compressor that employs a conventional oil pump structure.

[Explanation of symbols]

 1 Sealed Casing 1a Body Casing 1b Lid Casing 10 Oil Reservoir 13 Engagement Part 14 Extraction Hole 2 Motor 20 Support Housing 21 Drive Shaft 3 Oil Pump 30 Pump Case 31 Oil Extraction Outlet 32 Annular Groove 34 Seal Ring 4 Oil Extraction Cover 4a Pump receiving part 4b Mounting part 4c Support part 41 Communication passage 43 Recess 5 Oil extraction pipe 5a Small diameter oil extraction pipe 5b Large diameter oil extraction pipe

Claims (8)

[Claims] 1. The casing (1) is provided with oil in an oil sump (10) formed inside the casing (1) at the end of a drive shaft (21) of a motor (2) installed in the closed casing (1). Is an oil pump structure of a hermetic compressor provided with an oil pump (3) taken out from the outside of the body, wherein the hermetic casing (1) is a body casing for accommodating the motor (2) and the oil pump (3). (1a) and the body casing (1
and a lid casing (1b) fitted to the end of a), the oil pump (3) being provided in the lid casing (1b).
Pump receiving part (4a) into which said pump case (30) can be inserted, and oil extraction connected to said pump receiving part (4a) so as to be able to communicate with the oil intake port (31) of said pump case (30). An oil pump structure for a hermetic compressor, characterized in that a pipe (5) is provided and the oil take-out pipe (5) is taken out from the take-out hole (14) of the lid casing (1b) to the outside. 2. The pump receiving portion (4a) is attached to the pump case (3).
0) is formed into a tubular shape into which the pump case (3) can be inserted.
The oil outlet (31) is opened on the outer peripheral surface of (0),
The inner peripheral surface of the pump receiving portion (4a) and the pump case (3
The oil pump structure for a hermetic compressor according to claim 1, wherein a seal ring (34) is provided above and below the oil removal port (31) with respect to the outer peripheral surface of (0). 3. The pump receiving portion (4a) is attached to the pump case (3).
0) is formed into a tubular shape into which the pump case (3) can be inserted.
The oil outlet (31) is opened on the outer peripheral surface of (0),
On the outer peripheral surface of the pump case (30), the oil outlet (3
2. An annular groove (32) which is open in (1).
Alternatively, the oil pump structure of the hermetic compressor according to claim 2. 4. A pump receiving part (4a) is a mounting part (4b).
It is composed of an oil extraction cover (4) that is fixed to the lid casing (1b) via the above, and the mounting portion (4b) is formed so as to face the end surface of the body casing (1a), and the lid casing (1b) is formed. An engaging portion (13) for receiving the mounting portion (4b) is formed on the inner surface of the mounting portion (4b)
The oil removal cover (4) is fixed to the lid casing (1b) by sandwiching between the end surface of the body casing (1a) and the engaging portion (13) of the lid casing (1b). The oil pump structure for a hermetic compressor according to any one of claims 1 to 3. 5. A pump receiving portion (4) of the oil removal cover (4).
The oil pump structure for a hermetic compressor according to claim 4, wherein a) and the mounting portion (4b) are connected by a plurality of supporting portions (4c) extending in the radial direction. 6. The oil pump structure for a hermetic compressor according to claim 5, wherein a reinforcing recess (43) is formed in the support portion (4c) of the oil extraction cover (4). 7. An oil take-out pipe (5) is a pump receiving part (4a).
A small diameter oil take-out pipe (5a) connected to the small diameter oil take-out pipe (5a) and a large-diameter oil take-out pipe (5b) connected to the small-diameter oil take-out pipe (5a) and connected to the lid casing (1b). The oil pump structure for a hermetic compressor according to any one of claims 1 to 6. 8. A small diameter oil take-out pipe (5a) and a large diameter oil take-out pipe (5).
The oil pump structure for a hermetic compressor according to claim 7, wherein b) is connected by screwing.