WO2005028909A1

WO2005028909A1 - Supporting spring and compressor having the same

Info

Publication number: WO2005028909A1
Application number: PCT/KR2004/002224
Authority: WO
Inventors: Won-Hyun Jung; Dong-Won Lee; Chul-Gi Roh
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2003-09-22
Filing date: 2004-09-02
Publication date: 2005-03-31
Anticipated expiration: 2006-03-22
Also published as: CN1856669A; CN100587288C; KR20050029419A

Abstract

A supporting spring (200)comprises: a first winding portion (210) that a wire is wound plural times with the same outer diameter; a second winding portion (220) subsequent to the first winding portion and formed as a wire is wound plural times with an outer diameter different from that of the first winding portion (210); and a third winding portion (230) subsequent to the second winding portion (220) and formed as a wire is wound plural times with the same outer diameter as the first winding portion (210). The supporting spring (220) is positioned between two components thus to effectively absorb vibration and an impact generated at one component. A compressor having the supporting spring (200) minimizes a generation of vibration noise, and prevents collision noise and a component damage.

Description

Description SUPPORTING SPRING AND COMPRESSOR HAVING THE SAME Technical Field

[1] The present invention relates to a supporting spring and a compressor having the same, and more particularly, to a supporting spring capable of increasing an absorption rate for absorbing an impact or vibration generated when an external power is applied thereto and capable of minimizing vibration in back and forth and right and left directions, and a compressor having the same. Background Art

[2] In general, a spring absorbs and accumulates an external power as an elastic energy by its own elasticity. Therefore, when an external impact is applied to the spring, the spring attenuates the impact by absorbing it. Also, when a continuously repeated force, that is, vibration is transmitted to the spring from outside, the spring absorbs the vibration thus to prevent the vibration from being transmitted to other components.

[3] The spring includes a coil spring, a plate spring, a torsion bar, etc. according to a shape and a function thereof. The spring is very widely used in an automobile, a compressor, a factory machine, etc. where a repetitive force is generated.

[4] The coil spring has a high operation reliability, can be easily fabricated, and can lower a fabrication cost much more due to its cheap characteristic if a tool for forming only the spring is used, thereby being widely used in each kind of machine.

[5] The coil spring becomes linear as a wire wound as a circular shape passes through a straightening tool, and the straightened wire is wound with a preset bending angle by a forming tool thus to be fabricated as a preset number of turns.

[6] HGs. 1 and 2 are frontal and plane views showing one example of a general coil spring.

[7] As shown, the coil spring 10 is formed as a wire having a certain outer diameter is wound plural times as a spiral shape to form the same diameter. A part that the wire of the coil spring 10 is wound one time is called as a turn 11, and turns positioned at both ends of the coil spring 10 are called end coils 12. An interval between each turn 11 is the same, and an interval between the end coil 12 and the turn 11 adjacent to the end coil 12 becomes small.

[8] Operation of the coil spring will be explained as follows.

[9] As shown in FIG. 3, in case that the coil spring 10 is positioned between two components 20 and 30 that relatively move thus to elastically support said two components 20 and 30, the end coils 12 of the coil spring contact-support said two components 20 and 30.

[10] When an arbitrary force is repetitively applied to one component 20 of said two components 20 and 30 supported by the coil spring 10 in a longitudinal direction of the coil spring 10, the coil spring 10 is contracted/ relaxed and discharges the applied force. At the same time, a transmission of vibration repetitively applied to one component to another component is prevented.

[11] However, in the conventional art, since the turns 11 constituting the coil spring 10 have the same outer diameter, a compression length of the coil spring 10 is not sufficiently obtained in a process that the coil spring 10 absorbs an external impact or vibration or stores/discharges the external impact or vibration with being contracted/ relaxed in the longitudinal direction. Therefore, the coil spring 10 does not effectively absorb vibration in the longitudinal direction thereof, so that vibration of one component is transmitted to another component. Also, since the coil spring 10 is vibrated in back and forth and right and left directions, a collision with another component is generated. Disclosure of the Invention

[12] Therefore, it is an object of the present invention to provide a supporting spring capable of increasing an absorption rate for absorbing an impact or vibration generated when an external power is applied thereto and capable of minimizing vibration in back and forth and right and left directions, and a compressor having the same.

[13] To achieve these objects, there is provided a supporting spring: a first winding portion that a wire is wound plural times with the same outer diameter; a second winding portion subsequent to the first winding portion and formed as a wire is wound plural times with an outer diameter different from that of the first winding portion; and a third winding portion subsequent to the second winding portion and formed as a wire is wound plural times with the same outer diameter as the first winding portion.

[14] To achieve these objects, there is also provided a compressor comprising: a shell having a certain inner space; a compressing assembly positioned in the shell, for sucking gas, compressing and discharging the gas; and a plurality of supporting springs mounted between the shell and the compressing assembly, for elastically supporting the compressing assembly, wherein the supporting spring is a coil spring that a wire is wound plural times and an outer diameter of the coil spring is not constant but non-linear. Description of Drawings

[15] HGs. 1 and 2 are frontal and plane views showing one example of a general coil spring; [16] FIG. 3 is a frontal view showing an operational state of the coil spring;

[17] FlGs. 4 and 5 are frontal and plane views showing one embodiment of a supporting spring according to the present invention; [18] FIG. 6 is a frontal view showing another embodiment of the supporting spring according to the present invention; [19] FTGs. 7, 8, and 9 are frontal views respectively showing modification examples of a second winding portion constituting the supporting spring; [20] FIG. 10 is a sectional view showing one embodiment of a compressor having the supporting spring according to the present invention; [21] FIG. 11 is an enlargement sectional view showing the supporting spring of the compressor; and [22] FIG. 12 is a sectional view showing another embodiment of the supporting spring of the compressor. Mode for Invention [23] Hereinafter, a supporting spring and a compressor having the same according to the present invention will be explained with reference to the attached drawing with reference to the attached drawings. [24] First, one embodiment of the supporting spring of the present invention will be explained. [25] FTGs. 4 and 5 are frontal and plane views showing one embodiment of the supporting spring according to the present invention. [26] As shown, the supporting spring 100 includes: a first winding portion 110 that a wire having a certain length is wound plural times with the same outer diameter; and a second winding portion 120 subsequent to the first winding portion 110 and formed as a wire is wound plural times with an outer diameter larger than that of the first winding portion 110. The outer diameter of the first winding portion 110 is smaller than that of the second winding portion 120. [27] Turns respectively positioned at the ends of the first winding portion 110 and the second winding portion 120 constitute end coils 111 and 121, respectively. [28] It is preferable to form an interval between turns 112 of the first winding portion 110 constantly, and to form an interval between turns 122 of the second winding portion 120 constantly. Also, an interval between the end coil 111 of the first winding portion 110 and the turn 112 adjacent to the end coil 111 becomes narrow, and an interval between the end coil 121 of the second winding portion 120 and the turn 122 adjacent to the end coil 121 becomes narrow. Each diameter of the wires constituting the first winding portion 110 and the second winding portion 120 is the same.

[29] As another embodiment of the supporting spring of the present invention, as shown in FIG. 6, the supporting spring 200 includes: a first winding portion 210 that a wire is wound plural times with the same outer diameter; a second winding portion 220 subsequent to the first winding portion 210 and formed as a wire is wound plural times with an outer diameter different from that of the first winding portion 210; and a third winding portion 230 subsequent to the second winding portion 220 and formed as a wire is wound plural times with the same outer diameter as the first winding portion 110.

[30] The outer diameter of the second winding portion 220 is larger than outer diameters of the first and third winding portions 210 and 230, and each outer diameter of turns 221 constituting the second winding portion 220 is the same. An inner diameter of the second winding portion 220 is larger than the outer diameters of the first and third winding portions 210 and 230.

[31] An interval between each turn of the first, second, and third winding portions 210, 220, and 230 is the same.

[32] Turns respectively positioned at the ends of the first winding portion 210 and the third winding portion 230 constitute end coils 211 and 231, respectively. Also, an interval between the end coil 211 of the first winding portion 210 and the turn 212 adjacent to the end coil 211 becomes narrow, and an interval between the end coil 231 of the third winding portion 230 and the turn 232 adjacent to the end coil 231 becomes narrow.

[33] As a modification example of the second winding portion 220, as shown in FIG. 7, the second winding portion 220 is composed of: a fourth winding portion 222 subsequent to the first winding portion 210 and having an outer diameter larger than that of the first winding portion 210; a fifth winding portion 223 subsequent to the fourth winding portion 222 and having an outer diameter larger than that of the fourth winding portion 222; and a sixth winding portion 224 subsequent to the fifth winding portion 223 and having the same outer diameter as the fourth winding portion 222.

[34] Each outer diameter of turns constituting the fourth and sixth winding portions 222 and 224 is the same, and an outer diameter of turns constituting the fifth winding portion 223 is the same. [35] As another modification example of the second winding portion 220, as shown in FIG. 8, the outer diameters of the fourth and sixth winding portions 222 and 224 are the same each other, and are larger than the outer diameter of the fifth winding portion 223.

[36] Still another modification example of the second winding portion 220, as shown in FIG. 9, the outer diameters of the fourth winding portion 222, the fifth winding portion 223, and the sixth winding portion 224 are different from one another.

[37] Yet still another modification example of the second winding portion 220, the outer diameter of the second winding portion 220 is larger than the outer diameters of the first and third winding portions 210 and 230, and is formed as different outer diameters more than two.

[38] Hereinafter, operation of the supporting spring of the present invention will be explained as follows.

[39] The supporting spring of the present invention is positioned between two components thereby to elastically support said two components. Herein, the end coils 111 and 121 are respectively contact- supported by said two components. Under this state, when an external power such as an impact or vibration is applied to the supporting spring 100 in a longitudinal direction, the supporting spring 100 is contracted and relaxed thereby to absorb the external power.

[40] In said process, since the outer diameter of the supporting spring 100 has two steps or steps more than two, an elastic coefficient in the longitudinal direction of the supporting spring 100 becomes small. Also, a compression length is sufficiently obtained in the longitudinal direction of the supporting spring 100, thereby effectively absorbing vibration in the longitudinal direction of the supporting spring 100.

[41] Additionally, since the outer diameter of the supporting spring 100 has two steps or steps more than two, an elastic coefficient in the longitudinal direction of the supporting spring 100 becomes small and an elastic coefficient in the horizontal direction thereof becomes large. Therefore, vibration of the supporting spring 100 in back and forth and right and left directions is minimized.

[42] Said principle is equally applied to the supporting spring 200 shown in FIG. 6.

[43] FIG. 10 is a sectional view showing one embodiment of a compressor having the supporting spring according to the present invention.

[44] As shown, the compressor having the supporting spring of the present invention comprises: a shell 400 having a certain inner space; a compressing assembly 500 positioned in the shell 400, for sucking gas, compressing and discharging the gas; and a plurality of supporting springs 200 mounted between the shell 400 and the compressing assembly 500, for elastically supporting the compressing assembly 500, wherein the supporting spring 200 is a coil spring that a wire is wound plural times and an outer diameter of the coil spring is not constant but non-linear.

[45] The compressing assembly 500 includes: a driving motor part for generating a driving force by a power; and a compressing part operated by receiving the driving force of the driving motor part, for sucking gas, compressing, and discharging the gas. The driving motor part includes: a type for generating a linear reciprocating driving force, a type for generating a rotational driving force, etc. according to its kind. The compressing part includes: a cylinder, a piston, a valve, etc.

[46] As shown in FIG. 11, the supporting spring 200 includes: a first winding portion 210 that a wire is wound plural times with the same outer diameter; a second winding portion 220 subsequent to the first winding portion 210 and formed as a wire is wound plural times with an outer diameter different from that of the first winding portion 210; and a third winding portion 230 subsequent to the second winding portion 220 and formed as a wire is wound plural times with the same outer diameter as the first winding portion 210.

[47] The outer diameter of the second winding portion 220 is larger than the outer diameters of the first and third winding portions 210 and 230, and each outer diameter of turns constituting the second winding portion 220 is the same. Also, an inner diameter of the second winding portion 220 is larger than the outer diameters of the first and third winding portions 210 and 230.

[48] An interval between each turn of the first, second, and the third winding portions 210, 220, and 230 is the same.

[49] Turns respectively positioned at the ends of the first winding portion 210 and the third winding portion 230 constitute end coils 211 and 231, respectively. Also, an interval between the end coil 211 of the first winding portion 210 and the turn 212 adjacent to the end coil 211 becomes narrow, and an interval between the end coil 231 of the third winding portion 230 and the turn 232 adjacent to the end coil 231 becomes narrow.

[50] As a modification example of the second winding portion 220, as shown in FIG. 7, the second winding portion 220 is composed of: a fourth winding portion 222 subsequent to the first winding portion 210 and having an outer diameter larger than that of the first winding portion 210; a fifth winding portion 223 subsequent to the fourth winding portion 222 and having an outer diameter larger than that of the fourth winding portion 222; and a sixth winding portion 224 subsequent to the fifth winding portion 223 and having the same outer diameter as the fourth winding portion 222.

[51] Each outer diameter of turns constituting the fourth and sixth winding portions 222 and 224 is the same, and an outer diameter of turns constituting the fifth winding portion 223 is the same.

[52] As another modification example of the second winding portion 220, as shown in FIG. 8, the outer diameters of the fourth and sixth winding portions 222 and 224 are the same each other, and are larger than the outer diameter of the fifth winding portion 223.

[53] Still another modification example of the second winding portion 220, as shown in FIG. 9, the outer diameters of the fourth winding portion 222, the fifth winding portion 223, and the sixth winding portion 224 are different from one another.

[54] Yet still another modification example of the second winding portion 220, the outer diameter of the second winding portion 220 is larger than the outer diameters of the first and third winding portions 210 and 230, and is formed as different outer diameters more than two.

[55] As another modification example of the supporting spring, as shown in FIG. 12, the supporting spring 300 is formed as a wire having a certain length is wound plural times. An outer diameter of a turn 301 positioned in the middle of the plural turns is the largest, and outer diameters become smaller on the basis of the turn 301. An interval between each turn of the supporting spring is the same, and turns positioned at both ends of the supporting spring constitute end coils 302.

[56] Unexplained reference numerals 410 and 510 are mounting portions for mounting the supporting spring, 610 is a suction pipe, and 620 is a discharge pipe.

[57] Hereinafter, operation of the compressor having the supporting spring of the present invention will be explained as follows.

[58] When a power is supplied to the compressor, a driving force is generated at the driving motor part constituting the compressing assembly 500 thus to be transmitted to the compressing part. The compressing part is operated by receiving the driving force of the driving motor part, and sucks gas thus to compress and discharge the gas. Said processes are repeated. Herein, gas is introduced into the compressing part through the suction pipe, and then is discharged through the discharge pipe.

[59] During said processes, vibration is generated at the compressing assembly 500 for sucking gas and compressing/discharging the gas, and the vibration is absorbed by the plurality of supporting springs 200. [60] A process for absorbing vibration by the supporting spring 200 will be explained in more detail. First, the compressing assembly 500 is vibrated up and down and right and left with sucking gas and compressing/discharging the gas. According to this, the supporting spring 200 is contracted and relaxed in the longitudinal direction thereof thus to absorb the up-down vibration of the compressing assembly 500. At the same time, the supporting spring 200 moves back and forth and right and left thereby to absorb the vibration of back and forth and right and left directions of the compressing assembly 500.

[61] The outer diameter of the supporting spring 200 is not constant but non-linear, that is, has two steps or steps more than two. Therefore, an elastic coefficient in the longitudinal direction of the supporting spring 200 becomes small, and a compression length is sufficiently obtained in the longitudinal direction of the supporting spring 200, thereby effectively absorbing vibration in the longitudinal direction of the supporting spring 200.

[62] Additionally, since the outer diameter of the supporting spring 200 has two steps or steps more than two, an elastic coefficient in the longitudinal direction of the supporting spring 200 becomes small and an elastic coefficient in the horizontal direction thereof becomes large. Therefore, vibration of the supporting spring 200 in back and forth and right and left directions is minimized.

[63] In case that the driving motor part constituting the compressing assembly 500 generates a linear reciprocating driving force and the compressing part compresses gas by receiving the linear reciprocating driving force, vibration of the compressing assembly 500 in up and down, back and forth, and right and left directions becomes relatively great. In this case, the supporting springs 200 effectively absorb the vibration of the compressing assembly 500 in up and down, back and forth, and right and left directions. Said principle is equally applied to the supporting spring 300 shown in FIG. 12.

[64] In the compressor having the supporting spring of the present invention, up-down vibration of the compressing assembly 500 is effectively absorbed by the supporting spring 200. Therefore, a transmission of vibration generated at the compressing assembly 500 to the shell 400 is minimized, thereby minimizing vibration noise. Also, vibration of the compressing assembly 500 in back and forth and right and left directions is prevented, thereby preventing a collision between the compressing assembly 500 and the shell 400. Industrial Applicability [65] As aforementioned, the supporting spring of the present invention is positioned between two components that relatively move thus to effectively absorb vibration and an impact in the longitudinal direction thereof. According to this, a transmission of vibration or an impact generated at one component to another component is minimized. Also, components supported by the supporting spring are prevented from moving in back and forth and right and left directions thus to be prevented from colliding with another component, thereby preventing a component damage. Additionally, vibration noise generated at the compressor having the supporting spring is minimized thereby to enhance a reliability. Moreover, since vibration of the compressing assembly in back and forth and right and left directions is prevented, collision noise between components is prevented and a component damage is prevented.

[66] It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention cover modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

[1] A supporting spring comprising: a first winding portion that a wire is wound plural times with the same outer diameter; and a second winding portion subsequent to the first winding portion and formed as a wire is wound plural times with an outer diameter different from that of the first winding portion.

[2] The supporting spring of claim 1, wherein the outer diameter of the second winding portion is larger than that of the first winding portion.

[3] A supporting spring comprising: a first winding portion that a wire is wound plural times with the same outer diameter; a second winding portion subsequent to the first winding portion and formed as a wire is wound plural times with an outer diameter different from that of the first winding portion; and a third winding portion subsequent to the second winding portion and formed as a wire is wound plural times with the same outer diameter as the first winding portion.

[4] The supporting spring of claim 3, wherein the outer diameter of the second winding portion is larger than outer diameters of the first and third winding portions.

[5] The supporting spring of claim 3, wherein outer diameters of turns constituting the second winding portion are the same, and the outer diameter of the second winding portion is larger than the outer diameters of the first and third winding portions.

[6] The supporting spring of claim 3, wherein the second winding portion is composed of: a fourth winding portion subsequent to the first winding portion and having an outer diameter larger than that of the first winding portion; a fifth winding portion subsequent to the fourth winding portion and having an outer diameter larger than that of the fourth winding portion; and a sixth winding portion subsequent to the fifth winding portion and having the same outer diameter as the fourth winding portion.

[7] The supporting spring of claim 6, wherein the outer diameters of the fourth and sixth winding portions are smaller than the outer diameter of the fifth winding portion.

[8] The supporting spring of claim 6, wherein the outer diameters of the fourth winding portion, the fifth winding portion, and the sixth winding portion are different from one another.

[9] The supporting spring of claim 3, wherein the outer diameter of the second winding portion is larger than the outer diameters of the first and third winding portions, and is formed of different outer diameters more than two.

[10] A compres sor comprising : a shell having a certain inner space; a compressing assembly positioned in the shell, for sicking gas and compressing/discharging the gas; and a plurality of supporting springs mounted between the shell and the compressing assembly, for elastically supporting the compressing assembly, wherein the supporting spring is a coil spring that a wire is wound plural times and an outer diameter of the coil spring is not constant but non-linear.

[11] The compressor of claim 10, wherein the supporting spring comprises: a first winding portion that a wire is wound plural times with the same outer diameter; a second winding portion subsequent to the first winding portion and formed as a wire is wound plural times with an outer diameter different from that of the first winding portion; and a third winding portion subsequent to the second winding portion and formed as a wire is wound plural times with the same outer diameter as the first winding portion.

[12] The compressor of claim 11, wherein the outer diameter of the second winding portion is larger than the outer diameters of the first and third winding portions.

[13] The compressor of claim 11, wherein outer diameters of turns constituting the second winding portion are the same, and the outer diameter of the second winding portion is larger than the outer diameters of the first and third winding portions.

[14] The compressor of claim 11, wherein the second winding portion is composed of: a fourth winding portion subsequent to the first winding portion and having an outer diameter larger than that of the first winding portion; a fifth winding portion subsequent to the fourth winding portion and having an outer diameter larger than that of the fourth winding portion; and a sixth winding portion subsequent to the fifth winding portion and having the same outer diameter as the fourth winding portion.

[15] The compressor of claim 14, wherein the outer diameters of the fourth and sixth winding portions are larger than the outer diameter of the fifth winding portion.

[16] The compressor of claim 14, wherein the outer diameters of the fourth winding portion, the fifth winding portion, and the sixth winding portion are different from one another.

[17] The compressor of claim 11, wherein the outer diameter of the second winding portion is larger than the outer diameters of the first and third winding portions, and is formed of different outer diameters more than two.