JP2988539B2 - Hermetic compressor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic compressor used for refrigerators such as refrigerators and refrigerators and showcases.

[0002]

2. Description of the Related Art In recent years, there has been a growing demand for lowering noise in hermetic compressors, and there has been a demand for measures to reduce not only noise during operation but also noise generated at the time of starting and stopping. . As a conventional supporting device for a hermetic compressor, Japanese Patent Application Laid-Open No. 58-177567 and Japanese Utility Model Application Laid-Open
-66279, JP-A-59-159789, JP-A-59-165981, JP-A-49-5.
No. 4106, Japanese Utility Model Application Laid-Open No. 54-22111, Japanese Utility Model Application Publication No. 1-333826, etc., all propose a structure in which a compressor body is elastically supported using a coil spring.

[0003] Hereinafter, an internal support device of a conventional hermetic compressor will be described with reference to the drawings.

[0004] As a conventional example, FIGS.
No. 177567 discloses an internal support device for a hermetic compressor, wherein 1 is a casing, 2 is a compressor body, and 3
Is a support device. Reference numeral 5 denotes a seat provided on the casing 1 and the compressor main body 2 with a coil spring 4 interposed therebetween. The coil spring 4 is wound around the snubber 6 and is fixed. The coil spring 4 has a close fitting portion 9 that forms an interference fit, and the coil spring 4 has a small-diameter portion that forms a loose fitting portion 8 that forms a loose fit. Reference numeral 10 denotes a part of the coil spring 4 which is not normally in contact with the snubber 6.

FIG. 6 shows a supporting device for a hermetic compressor disclosed in Japanese Utility Model Laid-Open Publication No. 49-54106, wherein 11 is a casing, 12 is a lower mounting plate provided on the casing 11, and 13 is a lower part. The snubber is connected to the lower mounting plate 12. An upper seat 14 is provided on the compressor body (not shown), and an upper snubber 15 is connected to the upper seat 14. A coil spring 16 is fixed to the upper and lower snubbers 15 and 13. Reference numeral 17 denotes a space washer, at least the outer periphery of which is formed of an elastic buffer, and a lower end of the coil spring 16 and the lower mounting plate 12.
It is sandwiched between.

FIG. 7 is an enlarged cross-sectional view of a main part of a supporting device for a hermetic compressor disclosed in Japanese Utility Model Publication No. 1-382626, wherein 20 is an upper snubber, and 21 is a lower snubber. 22 is a coil spring. Reference numeral 23 denotes a bush, which is integrally formed of a synthetic resin, and has a shape press-fitted into a flange portion 23a abutting on a seat portion (not shown) provided on a compressor body (not shown) and an upper portion of the coil spring 22. And a cylindrical hole 23c inserted into the upper snubber 20.

The inner diameter of the cylindrical hole 23c is the upper snubber 2
It has a diameter larger than the outer diameter of 0, thereby improving assemblability.
The lower end of the coil spring 22 is fixed to the lower snubber 20.

[0008]

However, in the above-described configuration, the collision between the coil spring 4 and the snubber 6, especially the movement of the coil spring 4 against the movement of the compressor body 2 caused by the inertial force at the start and stop of the operation. The lateral movement of the portion 10 near the snubber 6 due to the inertial force causes a collision with the snubber 6, and the movement of the restoring force of the coil spring is also applied, so that the left and right collisions are repeated.

[0009] Also, the clearance fit portion 8
Due to the clearance, contact and rubbing occur in relation to the seat surface of the seat portion 5 and the snubber 6 at the time of starting and stopping. These collisions, contacts, and rubs have the problem of generating sound.

Further, in the case of the conventional example shown in FIG. 6, the coil spring 16 and the lower mounting are provided because of the elastic buffer of the lower space washer 17 against the noise at the time of starting and stopping pointed out in the aforementioned conventional example. Although the contact noise between the plate 12 and the seat surface is reduced, the contact is improved. However, the contact between the coil spring 16 and the lower snubber 13 remains. In addition, it is necessary to add components and the cost is increased.

In addition, in the upper snubber 15 provided on the upper end of the coil spring 16 and the compressor body, the insertion of the space washer 17 is not practical due to poor workability, and the method of FIG. There was a problem of being limited.

In the conventional example shown in FIG. 7, a clearance (24 in the figure) is generated because the inner diameter of the cylindrical hole 23c of the bush 23 is larger than the outer diameter of the upper snubber 20. Due to this clearance, the upper snubber 20 and the bush 23 collide with each other when the compressor body starts and stops.
The sound is generated as before, and the reliability of the bush 23 made of synthetic resin, such as wear, is affected by the frequency of starting and stopping during long-term operation.

The clearance is reduced to reduce the size of the bush 23.
Press-fitting into the snubber 20 makes workability difficult. Also, as in the second conventional example, the bush 23
The cost of parts and the operation cost increase.

Although the effect of improvement is recognized as described above,
It is clear that the above-mentioned problems remain.

The present invention has been made in view of the above problems, and provides an inexpensive and highly reliable internal support device for a hermetic compressor that reduces noise caused by movement due to inertial force that occurs when the compressor body starts and stops. Is what you do.

[0016]

SUMMARY OF THE INVENTION In order to solve the above problems, a supporting device for a hermetic compressor according to the present invention comprises a compressor main body, a casing for accommodating the compressor main body, and a compressor main body. A support device for elastically supporting the inside of the casing, wherein the support device includes a seat portion provided on each of the compressor body and the casing, a snubber portion connected to the seat portion, and both ends of the seat portion and the snubber portion. And a resin- coated coil spring having a fixed portion. At least one of the snubber portions protrudes from the seat portion. A columnar base portion connected to the root portion is connected to the columnar base portion and the base portion. Together with a tapered portion formed with a smaller diameter toward the distal end, wherein the diameter of the cylinder at the root is smaller than the diameter of the cylinder at the base,
And said seat and said snubber section and smaller than the inner diameter of the end portion of the coil spring and the resin coating on the side to be fixed, and the wire diameter of the height of the base portion of the resin quotes <br/> Ingu the coil spring The diameter of the cylinder of the base is smaller than the inner diameter of the end of the resin- coated coil spring on the side to be fixed to the seat and the snubber, and the base is squeezed at the edge on the base side. rice configuration and then it is the ash.

[0017]

According to the present invention, the end of the coil spring coated with the resin according to the above configuration is fixed between the root of the snubber portion and the seat surface. Since the diameter of the root portion of the snubber portion is smaller than the diameter of the base portion, even if the end of the resin- coated coil spring generates a force to be pulled toward the snubber tip, the movement is limited, so the resin- coated coil The spring end is pressed against the seat.

[0018] That motion by inertia compressor body occurs at the time of starting and stopping is transmitted to the coil spring and a resin coating, it is moving the coil springs that resin coating, a coil spring ends with a resin coating to move securely fixed There is no.

[0019] Even moves any chance, even if the rubbing of the resin Koti <br/> ring the coil spring end and the collision of the seating surface and the resin co <br/> computing the coil spring end and snubber portion, this portion The generation of sound at the point is eliminated.

Furthermore, one volume of the coil spring ends with a resin coating, snubber hand, since a fit tie, no generation of noise even in contact with the resin coated coil spring end and snubber.

Since the snubber portion is tapered so that the diameter becomes smaller toward the tip, the clearance between the snubber portion and the outer periphery of the snubber portion gradually increases after the second turn from the end of the resin- coated coil spring.

Furthermore, since the second turn at the end of the resin- coated coil spring is larger in diameter than the first turn, the second turn can obtain a sufficient clearance with the snubber portion.

Also, the compressor body moves due to the inertial force generated at the time of starting and stopping, and the resin- coated coil spring also moves. However, the second and subsequent turns of the resin- coated coil spring have a sufficient clearance as described above. The coil spring does not collide with the snubber, and even if it does collide with the snubber, no sound is generated because the coil spring is coated with the resin .

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A compressor according to an embodiment of the present invention will be described below with reference to the drawings. The same parts as those in the conventional example will be described using the same reference numerals, and the same components and operations will be omitted.

1, 2 and 3, 1 is a casing, 2 is a compressor main body, 3 is an internal support device, 31 is a seat of the compressor main body 2, 32 is a seat of the casing 1, and 33 is a compression body. Reference numeral 34 denotes a snubber portion of the machine main body 2, reference numeral 34 denotes a snubber portion of the casing 1, reference numeral 34a denotes a root portion, reference numeral 34b denotes a base portion, reference numeral 34c denotes a tapered portion, and reference numeral 50 denotes a resin- coated coil spring. 50a is the upper end of the resin- coated coil spring, and 50b is the lower end of the resin- coated coil spring.

The seats 31 and 32 provided on the casing 1 and the compressor main body 2 are provided with snubber portions 33 and 34, respectively, and a resin- coated coil spring 50 is pushed in and fixed.

The snubber portion 34 includes a cylindrical base portion 34a protruding from the seat portion 32, a cylindrical seat portion 34b, and a tapered portion 34c having a smaller diameter toward the distal end.

The diameter of the column of the root portion 34a is smaller than the diameter of the column portion of the base 34b and smaller than the wire diameter of the coil spring 50 coated with resin . The diameter of the cylinder of the base 34b is the same as that of the resin- coated coil spring 50.
Are larger than the inner diameter of the lower end portion 50b of the first portion.

In the above configuration, both ends 50a and 5a of the resin- coated coil spring 50 are formed.
Ob is fixed to snubber parts 33 and 34, respectively, and elastically supports the compressor body.

The lower end portion 50b of the resin- coated coil spring is fixed so that the root portion 34a sandwiched between the edges of the seat portion 32 and the base portion 34b of the snubber portion 34 is hardly inserted due to the above-described dimensional relationship. Will be done.

Therefore, the lower end 50b of the resin- coated coil spring 50 does not move due to the inertial force generated when the compressor body starts and stops, so that the lower end 5 of the resin- coated coil spring 5 is not moved.
The noise generated at the start and stop of the compressor body can be reduced because the collision noise between the compressor 0b and the seat portion and the rubbing noise of the snubber portion 34 and the resin- coated coil spring lower end portion 50b do not occur. Can be.

The material of the snubber 34 may be the same as that of the prior art. Since the coil spring 50 coated with resin is made of a synthetic resin, the coil spring 50 does not make a collision sound even if it is rubbed in contact with the seat portion. Noise generated at the time of stoppage can be reduced and the effect can be improved.

[0033]

As described above, the present invention provides a seat provided on each of a compressor main body and a casing, a snubber portion connected to the seat, and a resin- coated coil having both ends fixed to the seat and the snubber portion. It consists of a spring, and at least one of the snubber portions is formed from a cylindrical root portion protruding from the seat portion, a columnar base portion connected to the root portion, and a tapered portion connected to the base portion and having a smaller diameter toward the distal end side. The diameter of the column at the root is smaller than the diameter of the column at the base, smaller than the inner diameter of the end of the resin- coated coil spring on the side to be fixed to the seat and the snubber, and the height of the column at the root. Is
Smaller than the wire diameter of the resin coated coil spring, the diameter of the cylindrical base, larger than the inner diameter of the end portion of the coil spring and a resin coating on the side fixed to the seat and snubber portion, the root portion side of the base portion by the close fit at the edges, the end portion of the coil spring with a resin coating to be fixed so as to bite into the gap root portion sandwiched edge of the base of the seat and the snubber section, the resin coating The end of the coil spring does not move, so that the collision noise between the end of the resin- coated coil spring and the seat and the rubbing noise of the snubber do not occur, so that the noise generated when the compressor body starts and stops can be reduced.

Further, a seat provided on each of the compressor body and the casing, a snubber portion connected to the seat, and a coil spring formed by resin coating with both ends fixed to the seat and the snubber, respectively. The resin-coated coil spring has at least one end having an inner diameter of one turn smaller than the inner diameter of the next second turn, and has a snubber portion on the side for fixing the end. , a cylindrical base portion projecting from the seat, and consists of a tapered portion formed on the small-diameter tapered portion formed in the more distal end side small diameter, or the seat as projecting tip with connected to this base, and tree fat coating one small volume than the inner diameter of the end portion of the coil spring becomes a tight fit, by following the second turn later has a base and tapered portion and the gap, the resin co <br/> Ti The first turn of the grayed coils spring end is fixed by an interference fit, the second turn after can snubber portion and space, so eliminated can result sound due to the collision,
Noise generated when starting and stopping the compressor body can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a support device for a hermetic compressor according to the present invention.

FIG. 2 is an enlarged sectional view of a main part of FIG. 1;

FIG. 3 is an enlarged sectional view of the resin- coated coil spring of the present invention.

FIG. 4 is a cross-sectional view showing a conventional supporting device for a hermetic compressor.

FIG. 5 is an enlarged sectional view of a main part of the hermetic compressor of FIG. 4;

FIG. 6 is a sectional view of a main part of a hermetic compressor showing another conventional example.

FIG. 7 is a sectional view of a main part of another hermetic compressor equivalent to FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 2 Compressor main body 3 Internal support device 31 Seat part 32 Seat part 33 Snubber part 34 Snubber part 34a Root part 34b Base part 34c Taper part 50 Coil spring 50a Upper end part 50b Lower end part

Claims (1)

(57) [Claims] 1. A compressor body, a casing accommodating the compressor body, and an internal support device for elastically supporting the compressor body in the casing, wherein the internal support device is provided on the compressor body. Seat, a seat provided on each of the casings, a snubber portion connected to the seat provided on the compressor body, and an upper end having both ends fixed to the seat and the snubber provided on the casing, respectively. And a resin- coated coil spring having a lower end, wherein at least one of the snubber portions protrudes from the seat portion, a columnar base portion connected to the root portion, and a columnar base portion connected to the base portion. Together with a tapered portion having a smaller diameter toward the distal end, wherein the diameter of the cylinder at the root is smaller than the diameter of the cylinder at the base, and Part and the inner diameter of the end of the resin- coated coil spring that is fixed to the snubber part, and the height of the root part is
The diameter of the cylinder at the base is smaller than the wire diameter of the resin- coated coil spring, and the diameter of the cylinder at the base is larger than the inner diameter of the end of the resin- coated coil spring on the side fixed to the seat and the snubber. A hermetic compressor using a resin- coated coil spring having an upper end and a lower end, wherein the hermetic seal is fitted at an edge of a root portion side.