KR19980076770A - Spring support mechanism for hermetic compressor - Google Patents

Abstract

The present invention relates to a spring support mechanism for a hermetic compressor for improving a support mechanism for buffering a vertical impact acting on the main operation part in a hermetic compressor connected to a pipe through which a refrigerant of a refrigerator is circulated.

The present invention provides a refrigerator compressor in which a fixing bolt 17 for integrally coupling a stator on a frame that is a support of a main component is connected to a support at a lower end of a sealed case 11 via a buffer spring 18. A portion in which the shock absorbing spring 18 is press-fitted in the support 26 is formed by repeating alternately intersecting the projections 26a and the recesses 26b every predetermined height H; The inner diameter of the buffer spring 18 is formed to be smaller than the diameter of the protrusion 26a of the support 26 and larger than the diameter of the recess 26b.

Accordingly, the present invention is to ensure that the spring that buffers the vertical shock acting on the main operating part in the hermetic compressor is firmly supported, so that the components inside the compressor are not easily separated even when the horizontal direction is impacted during transportation of the compressor. There is an effect to prevent it.

Description

Spring support mechanism for hermetic compressor

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor, and more particularly, to a hermetic compressor for improving a support mechanism for buffering a vertical impact acting on a main operation part in a hermetic compressor connected to a pipe through which a refrigerant of a refrigerator is circulated. It relates to a spring support mechanism.

In a refrigerator, a compressor is a means for converting rotational force due to electrical energy into mechanical energy of reciprocating motion, and a refrigerant having a low boiling point is brought to a high pressure (about 12 atm) while passing through the compressor. The high pressure refrigerant is cooled in the condenser to become a liquid state, and once the liquid refrigerant is gasified in the cooler, one refrigeration cycle is completed.

1 is an exemplary view schematically showing an internal configuration of a hermetic compressor.

The compressor 10 has a structure in which a suction pipe (not shown) and a discharge pipe (not shown) of a refrigerant are bonded to the outside of the sealed case 11 and a high pressure generating means (! 3) is mounted therein. The high pressure generating means (! 3) can be roughly divided into cylinders, pistons, valves, and the like, and are connected to the motor 15 and the shaft 12 which are installed below.

In operation, the shaft 12 rotated by the motor induces the cam motion of the eccentric cam on its upper part, and the cam motion again reciprocates the piston in the cylinder through the connecting rod of the high pressure generating means 13, and the valve Is passively opened and closed by the pressure difference between both sides formed at this time to maintain one-way flow of the refrigerant.

For reference, the refrigerant introduced through the suction pipe is filled into the sealed case 11 and then introduced into the cylinder through the suction muffler, and the refrigerant compressed in the cylinder passes through the discharge muffler and passes through the discharge pipe to the condenser (not shown). Is sent. The suction muffler and the discharge muffler play a role of reducing the compressor noise that occupies most of the operation noise of the refrigerator.

Such cylinders, pistons, valves, discharge mufflers, and the like are formed as an integral assembly and supported on the frame 14 together with the motor 15 made of a rotor and stator. The frame 14 also serves as a bushing for rotatably supporting the rotor mounted shaft 12, while being positioned on the upper surface of the stator to accommodate the rotor to rotate at regular intervals and fixing bolts 17 from below. Is fastened to.

The frame 14 and the stator which are integrally assembled by the fixing bolt 17 serve as a structure for supporting the above-mentioned working parts in the sealing case 11, while the head of the fixing bolt 17 has a sealed case 11. If the upper end of the shock absorbing spring 18 fitted to the support 16 at the lower end of the shock absorber in the vertical direction applied to the compressor 10, the vibration of the compressor operating portion is also transmitted to the outside.

However, since the shock absorbing spring 18 is located at the inner bottom of the sealed case 11 out of reach of the operator, the coupling between the shock absorbing spring 18, the fixing bolt 17, and the support 16 is incomplete. (10) or when the refrigerator is inclined to the side when the finished product, such as a buffer spring 18 is separated from the head or support 16 of the fixing bolt 17 has a disadvantage that does not play a role of the buffer.

Accordingly, the stator of the frame 14 and the motor 15, which are integrally assembled and serve as a structure for supporting the working parts, may collide with the sealing case 11 and cause damage to the main parts.

In addition, when the buffer spring 18 having a small winding diameter is used to increase the coupling force between the support 16 and the shock absorbing spring 18 or the diameter of the fastening part of the surfer 16 is increased, the mounting is difficult.

Therefore, the present invention is a hermetic type to protect the components inside the compressor by preventing the spring shock absorbing the vertical impact acting on the main operating portion in the hermetic compressor connected to the pipe through which the refrigerant of the refrigerator is circulated so as not to be released during transportation of the compressor. It is an object of the present invention to provide a spring support mechanism for a compressor.

1 is an exemplary view schematically showing an internal configuration of a hermetic compressor;

Figure 2 is a block diagram showing the main part of the mechanism according to the invention with partial enlargement.

* Description of the symbols for the main parts of the drawings *

10 compressor 11 sealed case

12 shaft 13 high pressure generating means

14 frame 15: motor

16: support (conventional) 17: fixed bolt

18: buffer spring 26: support (invention)

26a: projection 26b: groove

H: height

In order to achieve the above object, the present invention provides a refrigerator in which a fixing bolt 17 integrally coupling a stator on a frame, which is a support of a main part, is connected to a support at the bottom of the sealed case 11 through a buffer spring 18. A compressor for: A portion of the support (26) into which the shock absorbing spring (18) is press-fitted is formed such that the projection (26a) and the recess (26b) are alternately intersected every predetermined height (H); The inner diameter of the shock absorbing spring 18 is smaller than the diameter of the protrusion 26a of the support 26 and at the same time larger than the diameter of the groove 26b provides a spring support mechanism for a hermetic compressor.

At this time, the height H between the grooves 26b of the support 26 is an integer multiple of the compressed state pitch of the shock absorbing spring 18, more preferably the same.

EXAMPLE

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

Figure 2 is a block diagram showing the main part of the mechanism according to the present invention with partial enlargement.

The present invention is applied to a refrigerator compressor that is connected to the support at the bottom of the inside of the sealed case 11 via a fixing spring (18) is fixed bolt 17 integrally coupling the stator on the frame that is the support of the main parts The main point is to improve the structure of the support 26, which is one of the supporting means.

Fixing by welding to the lower end of the sealed case 11 and inserting the buffer spring 18 is the same as the conventional support 16 (Fig. 1).

At this time, according to the present invention, the portion in which the shock absorbing spring 18 is press-fitted in the support 26 is formed repeatedly and alternately intersects the projection 26a and the recess 26b at a predetermined height H.

The protrusion 26a is formed into a curved surface having a predetermined curvature through cutting using a lathe. In this process, a recess 26b is formed in the connecting portion. The protrusion 26a may be formed simultaneously in the process of forming the support 26 by forging instead of cutting.

At least three or more of the protrusions 26a and the recesses 26b alternately intersect at predetermined heights H may be repeated to maintain sufficient coupling force. However, the formation of too many protrusions 26a in the limited space also results in the reduction of the respective heights H, thereby lowering the tightening force. In other words, the height (H) should not be smaller than the coil diameter of the buffer spring (18).

Further, according to the present invention, the inner diameter of the buffer spring 18 is smaller than the diameter of the protrusion 26a of the support 26 and at the same time larger than the diameter of the recess 26b.

The conventional support 16 has one diameter in the fastening portion, but in the case of the support 26 of FIG. 2, since the maximum diameter and the minimum diameter coexist, the inner diameter of the shock absorbing spring 18 is preferably within this range. . This range can be appropriately increased or decreased by the height H of the groove portion 26b and the radius of curvature of the protrusion 26a. If too small, it is difficult to expect an improvement in the clamping force of the shock absorbing spring 18 for the purpose of the present invention.

When the inner diameter of the shock absorbing spring 18 is larger than the diameter of the protrusion 26a, which is the maximum diameter, the clamping force by the shock absorbing spring 18 is zero, and the inner diameter of the shock absorbing spring 18 is larger than the diameter of the recess 26b which is the minimum diameter. When it becomes small, the installation of the high pressure generating means 13 and the frame 14 of FIG. 1 becomes difficult or impossible.

However, since the shock absorbing spring 18 is easy to elastic deformation, the latter case may be applied to some extent. When the inner diameter of the shock absorbing spring 18 is slightly smaller than the diameter of the recess 26b, the fastening force by the shock absorbing spring 18 may be improved.

At this time, in the present invention, the height H between the grooves 26b of the support 26 is an integer multiple of the pitch of the compressed state of the buffer spring 18, more preferably the same.

When the assembly of the high pressure generating means 13, the motor 15, the frame 14, etc. of FIG. 1 is mounted on the support 26 via the shock absorbing spring 18, the shock absorbing spring 18 is elastically deformed. Because of this, the maximum displacement maintains the normal displacement after the boydak is completed. The pitch at this time is referred to as the 'compressed pitch'. There is no significant change in this compressed pitch during compressor operation.

If the height H between the grooves 26b of the support 26 or the height H between the protrusions 26a is equal to the compressed state pitch, the buffer spring 18 is supported by the support 26 as shown in the enlarged view of FIG. It is aligned between the grooves (26b) of the) and is in a state capable of exerting the most secure fastening force. Even if the height H between the grooves 26b of the support 26 or the height H between the protrusions 26a becomes an integer multiple of the compressed pitch, the effect is similar, but the shock absorbing spring that extends over the support 26 is similar. The number of coils of 18 decreases or the coil of the shock absorbing spring 18 extends over the protruding portion 26a, so that the tightening force is slightly lowered.

On the other hand, in this figure is shown with respect to one buffer spring 18 and the support 26, in fact the present invention is fixed bolt 17 used to integrally combine the frame 14 and the motor 15 of FIG. This applies to all parts connected with.

Accordingly, the compressor to which the present invention is applied can easily absorb the impact force in the horizontal direction, so that even when the compressor is transported transversely, the shock absorbing spring 18 is not detached and the parts inside the compressor can be protected.

As described in the present invention, the spring support mechanism for the hermetic compressor of the present invention allows the spring of the compressor to firmly support the vertical shock acting on the main operation part of the hermetic compressor connected to the pipe through which the refrigerant of the refrigerator is circulated. It is effective in preventing damage to the internal parts of the compressor because it is not easily detached even when subjected to a horizontal shock during transportation.

While the invention has been shown and described with respect to certain preferred embodiments, it will be understood that the invention can be variously modified and modified without departing from the spirit or scope of the invention as set forth in the following claims. Those skilled in the art can easily know that.

Claims (2)

In a compressor for a refrigerator in which a fixing bolt 17 which integrally couples a stator on a frame, which is a support of a main component, is connected to a support at a lower end of a sealed case 11 via a buffer spring 18: A portion in which the shock absorbing spring 18 is press-fitted in the support 26 is repeatedly formed by alternately intersecting the projections 26a and the recesses 26b at predetermined heights H; The inner diameter of the shock absorbing spring (18) is smaller than the diameter of the protrusion (26a) of the support 26 and at the same time larger than the diameter of the groove portion (26b) spring support mechanism for hermetic compressor. 2. The hermetic type according to claim 1, wherein the height H between the grooves 26b of the support 26 is an integer multiple of the compressed pitch of the shock absorbing spring 18, more preferably the same. Spring support mechanism for the compressor.