KR100202890B1 - Stopper for a hermetic compressor - Google Patents

Abstract

The present invention relates to a stopper for a hermetic compressor, which improves the structure of a portion for buffering vertical impact acting on a main operation portion in a hermetic compressor of a refrigerator.

The present invention is characterized in that a fixing bolt 21 for assembling main parts such as a stator 18, a rotor 19 and a shaft 12 integrally on a frame 17 is pressed against a stopper at the lower inner end of the enclosure 11 Wherein the stopper includes a vertical portion fixed to the closed case, a horizontal portion perpendicular to the vertical portion, A latching part 35 fixed to the vertical part 34 and a receiving part 36 orthogonal to the vertical part 34 and the horizontal part 33 are formed in an integrated structure; And the impact transmitted to the frame (17) is supported by the receiving portion (36).

Accordingly, the present invention improves the structure of the stuffer which blocks the plastic deformation due to the vertical impact acting on the main operating part in the hermetic compressor connected to the piping through which the refrigerant of the refrigerator circulates, There is an effect of preventing the internal parts of the compressor from being damaged even if a shock is applied.

Description

Stopper for sealed compressors

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a compressor, and more particularly, to a compressor in which a refrigerant of a refrigerator is connected to a circulating pipeline, To a stopper for a hermetic compressor.

BACKGROUND ART In a refrigerator, a compressor is a means for converting a rotational force due to electrical energy into a mechanical energy of reciprocating motion, and a refrigerant having a low boiling point is put into a high pressure state of about 12 atmospheres while passing through the compressor. The high-pressure refrigerant is cooled in the condenser to be in a liquid state. When this liquid-state refrigerant is vaporized in the cooler, one refrigeration cycle is completed.

FIG. 1 is an exemplary view schematically showing the inside 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 connected to the outside of the closed casing 11 and a high-pressure generating means is installed inside. The high pressure generating means can be divided into a cylinder 13, a piston 14, a valve 15, and the like, and is connected to a motor portion provided at a lower portion thereof by a shaft 12.

In operation, the shaft 12, which is rotated by the motor, induces eccentric cam movement at its top and eccentric cam movement again reciprocates the piston 14 in the cylinder 13 through the connecting rod, Is opened and closed by the pressure difference between both sides formed at this time to move the refrigerant in one direction.

For reference, the refrigerant introduced through the intake pipe flows into the cylinder 13 through the suction muffler after being filled in the closed casing 11, and the refrigerant compressed in the cylinder 13 passes through the discharge muffler 16 (Not shown) through an exhaust pipe. The suction muffler and the exhaust muffler 16 serve to reduce the compressor noise that occupies most of the refrigerator operating noise.

The cylinder 13, the piston 14, the valve 15, the exhaust muffler 16, and the like are formed as an integral assembly and supported on the frame 17. The frame 17 also serves as a bushing for rotatably supporting the shaft 12 on which the rotor 19 is mounted and is provided on the upper surface of the stator 18 for accommodating the rotor 19 to rotate at a constant interval Assembled and fastened with the fixing bolt 21 from the downward direction.

The frame 17 and the stator 18 integrally assembled by the fixing bolts 21 serve as a structure for supporting the above-mentioned operating parts in the closed case 11, while the head of the fixing bolt 21 is closed (The dotted line) sandwiched by the stopper 22 at the lower end of the case 11, the vibration in the vertical direction applied to the compressor 10 is buffered and the vibration of the high-pressure generating portion is also transmitted to the outside .

However, since the stopper 22 formed by bending an iron plate has a weak impact structure, it can not serve as a buffer, and a thick plate material must be used unless the structure is changed.

In addition, when the compressor is subjected to an excessive impact force in one direction in the case of moving the refrigerator or the like, the supporting force of the compression spring against the frame 17 and the stator 18, which are integrally assembled to support the operating parts, , Parts damage, and the like.

Accordingly, it is an object of the present invention to provide a stopper for a hermetic compressor that improves the structure of a portion for buffering vertical impact acting on a main operating portion in a hermetic compressor connected to a piping through which a refrigerant of a refrigerator is circulated, For that purpose.

FIG. 1 is an exemplary view schematically showing the inside of a hermetic compressor. FIG.

FIG. 2 is a perspective view showing a stopper of FIG. 1; FIG.

FIG. 3 is a perspective view showing a stopper according to the present invention. FIG.

FIG. 4 is a schematic view showing the bending stress acting section of FIG. 2 and FIG. 3; FIG.

DESCRIPTION OF THE REFERENCE NUMERALS

10: compressor 11: sealed case

12: shaft 13: cylinder

14: piston 15: valve

16: exhaust muffler 17: frame

18: stator 19: rotor

21: Fixing bolt 22: Stopper (Conventional)

23, 33: horizontal portion 24, 34: vertical portion

25, 35: fastening portions 26, 36:

32: Stopper (invention) F: Impact force

t × ℓ: thickness × length

In order to achieve the above object, the present invention is characterized in that a fixing bolt 21 for integrally assembling main components such as the stator 18, the rotor 19, the shaft 12, Wherein the stopper includes a vertical portion fixed to the closed case and a horizontal portion extending perpendicularly to the vertical portion, A locking part 35 fixed on the horizontal part 33 and a receiving part 36 orthogonal to the vertical part 34 and the horizontal part 33 are formed in an integrated structure; And the impact transmitted to the frame (17) is supported by the receiving portion (36).

At this time, the receiving portion 36 is bent from the vertical portion 34 or bonded to at least the vertical portion 34.

[Example]

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a perspective view showing the stopper of FIG. 1.

The conventional stopper 22 has a structure in which a plate member is cut and bent to form a horizontal portion 23, a vertical portion 24 and a receiving portion 26 and the latch portion 25 is joined to the horizontal portion 23 to be.

1, one end of the compression spring is press-fitted into the head of the fixing bolt 21 (first drawing), and the other end thereof is press-fitted into the horizontal portion 23 of the stopper 22 And performs buffering function.

When the impact load exceeding the buffering force of the compression spring is transmitted to the frame 17, the receiving portion 36 easily undergoes plastic deformation, and the horizontal portion 23 is subjected to the same plastic deformation Lt; / RTI >

FIG. 3 is a perspective view showing a stopper according to the present invention.

The present invention is characterized in that a fixing bolt 21 for assembling main parts such as a stator 18, a rotor 19 and a shaft 12 integrally on a frame 17 is pressed against a stopper at the lower inner end of the enclosure 11 Applies to compressors mounted via springs.

1, the cylinder 13, the piston 14, the valve 15, the exhaust muffler 16 and the like are supported on the frame 17 by an integral assembly, and the shaft 12 Is fixed to the upper surface of the stator 18 and fixed with the fixing bolts 21 from the downward direction.

The stopper 32 of the present invention includes a vertical portion 34 fixed to the closed case 11, a horizontal portion 33 orthogonal to the vertical portion 34, And the support portion 36 orthogonal to the vertical portion 34 and the horizontal portion 33 are formed integrally with each other so that the impact transmitted to the frame 17 is transmitted to the support portion 35. [ (36).

One plate member is cut and bent to form the horizontal portion 33, the vertical portion 34 and the receiving portion 36 and the latching portion 35 for press-fitting the compression spring is formed on the horizontal portion 33 Bonded structure.

At this time, the receiving portion 36 is bent from the vertical portion 34 or bonded to at least the vertical portion 34.

The conventional pedestal portion 26 is connected to the horizontal portion 23, while the pedestal portion 36 of the present invention is connected to the vertical portion 34. A method of bending the support portion 36 as in the prior art or a method of welding may be used. In the latter case, the receiving portion 36 may be bonded to the vertical portion 34 and the horizontal portion 33 at the same time.

FIG. 4 shows a schematic view showing the bending stress acting section of FIG. 2 and FIG. 3.

In the case of comparing the sections subjected to the bending stress when the same impact force F is applied by using the plate materials of the same thickness x length (t x l) in the above-described second and third figures, conventionally, (Left side in the drawing) and the present invention is formed vertically (right side in the drawing).

When both plates have the same thickness × length (t × ℓ), the shear strength according to the same impact force (F) is the same.

However, from the viewpoint of the bending strength, when the sectional modulus of the conventional and the present invention are Z ₁ and Z ₂ , respectively,

^{_{Z 1 = ℓ * t 2/}} 6 Z 2 = t * ℓ 2/6

Z < ₁ > Z < ₂ >

That is, in the case of the present invention, since the section modulus increases, the bending stress decreases from the bending stress? = M / Z to the bending moment (M) by the same impact force (F). That is, the bending strength is increased.

With this configuration, even if the impact force F exceeding the buffering force of the compression spring is transmitted to the frame 17 as in the conventional art, the support portion 36 is hardly subjected to plastic deformation. Since the support portion 36 is connected to the vertical portion 34 even if the support portion 36 is plastically deformed, the horizontal portion 23 is not affected by the structure, so that the support force of the compression spring is uniformly maintained, (E.g., vibration and noise).

Referring to FIG. 1, one compression spring and a fixing bolt 21 are shown in the present embodiment. However, in the present invention, To the stopper (32) supporting the bolt (21).

Accordingly, even when an excessive impact force is generated in the vertical direction when the refrigerator or the compressor is moved, the compressor to which the present invention is applied can protect the internal parts without colliding with each other by the compression spring and the stopper.

As described above, the hermetic compressor stopper of the present invention improves the structure of the stopper that blocks the plastic deformation caused by the vertical impact acting on the main operation portion in the hermetic compressor, which is connected to the piping through which the refrigerant of the refrigerator circulates, There is an effect of preventing the internal parts of the compressor from being damaged even when an excessive impact is applied to the compressor during transportation of the compressor.

Although the present invention has been shown and described with respect to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as set forth in the following claims Those skilled in the art will readily know what is known in the art.

Claims (2)

A fixing bolt 21 integrally assembled on the frame 17 with the main components such as the stator 18, the rotor 19 and the shaft 12 is fixed to the stopper at the lower end of the inside of the closed case 11 with a compression spring The stopper 32 includes a vertical portion 34 fixed to the closed case 11, a horizontal portion 33 orthogonal to the vertical portion 34, And a receiving portion 36 orthogonal to the vertical portion 34 and the horizontal portion 33 are formed in an integrated structure; And the impact transmitted to the frame (17) is supported by the receiving portion (36). The stopper for a hermetic compressor according to claim 1, wherein the receiving portion (36) is bent from the vertical portion (34) or bonded to at least the vertical portion (34).