CN203453056U

CN203453056U - Scroll compressor with unloader assembly

Info

Publication number: CN203453056U
Application number: CN201320233026.1U
Authority: CN
Inventors: 阿贾伊·乌特帕特; 詹姆斯·A·舍费尔
Original assignee: Emerson Climate Technologies Inc
Current assignee: Copeland LP
Priority date: 2012-04-30
Filing date: 2013-05-02
Publication date: 2014-02-26
Anticipated expiration: 2023-05-02
Also published as: CN103382938B; CN103382938A

Abstract

A scroll compressor having an unloader assembly may include a housing, orbiting and non-orbiting scrolls, an unloader bushing assembly, and a drive shaft. The unloader bushing assembly can include a drive bushing and a spring. The drive bushing includes an outer surface engaged with the orbiting scroll and may define an opening extending from a first bushing end to a second bushing end. The spring may include a body disposed within the opening of the drive bushing and may include a first spring end and a second spring end, wherein at least a portion of the first spring end extends laterally from the body and overlaps the first bushing end. At least a portion of the second spring end may extend laterally from the body and overlap the second bushing end to secure the spring within the drive bushing. The drive shaft may include a crank pin disposed within the opening of the drive bushing and engaged with the spring.

Description

The scroll compressor with unloader assembly

The cross reference of related application

The application requires rights and interests and the preference of the Indian patent application No.1344/MUM/2012 of submission on April 30th, 2012.Whole disclosures of above-mentioned application mode is by reference incorporated to herein.

Technical field

The disclosure relates to the unloader assembly in scroll compressor.

Background technique

Environmental control system such as heat pump, refrigeration system or air-conditioning system for example can comprise fluid circuit, this fluid circuit has outdoor heat converter, indoor heat converter, is arranged on the expansion gear between indoor heat converter and outdoor heat converter and makes working fluid (for example, refrigeration agent or carbon dioxide) one or more compressors of circulation between indoor heat converter and outdoor heat converter.In order to ensure the environmental control system that compressor is installed, can effectively and efficiently provide as required cooling effect and/or heating effect, need efficiently and reliably moving of compressor.

Model utility content

This section provides general introduction of the present disclosure, does not comprise all sidedly four corner of the present disclosure or all features of the present disclosure.

A compressor, can comprise housing, be supported on bearing case in housing, be supported on moving vortex on bearing case, engage engagingly with moving vortex determine vortex, unloader bush assembly and live axle.Unloader bush assembly can comprise driving lining and spring.Drive lining can there is the outer surface engaging with moving vortex, and drive lining to be limited with the longitudinal extension opening that extends to second longitudinal lining end from first longitudinal lining end.Spring can comprise the longitudinal extension body being arranged in the longitudinal extension opening that drives lining, and spring has the first longitudinal spring end and the second longitudinal spring end, wherein, at least a portion of the first longitudinal spring end from body laterally extend and with first longitudinal lining end lap.At least a portion of the second longitudinal spring end can from body laterally extend and with second longitudinal lining end lap, so that spring is fastened on, drive in lining.Live axle can extend through bearing case and can comprise eccentric crank pin, and this eccentric crank pin is arranged in the longitudinal extension opening that drives lining and engages with spring.

The first longitudinal spring end can comprise the first protuberance laterally extending from the first lateral springs end and the second protuberance laterally extending from the second lateral springs end contrary with the first lateral springs end.This first protuberance and this second protuberance can extend on the first end face being limited by first longitudinal lining end.This second longitudinal spring end can comprise the 3rd protuberance laterally extending from the first lateral springs end and the 4th protuberance laterally extending from the second lateral springs end.The 3rd protuberance and the 4th protuberance can extend on the second end face being limited by first longitudinal lining end.Spring can comprise towards the internal surface of eccentric crank pin and the outer surface contrary with internal surface.The second longitudinal spring end can comprise from outer surface and extends outwardly into the 3rd protuberance the second end face being limited by second longitudinal lining end.First longitudinal lining end can limit the first recess and the second recess, the first recess comprises the first area of the first end face, the second recess comprises the second area of the first end face, and wherein, the first protuberance extends in the first recess and the second protuberance extends in the second recess.

This driving lining can be limited with guidance field in the position between the first recess and the second recess circumferentially, this guidance field longitudinally stretches out from the end face being limited by the first recess and the second recess, and this guidance field is limited with the internal surface closing with the first longitudinal spring termination.This driving lining can comprise the first longitudinal wall extending from the first recess and the second longitudinal wall extending from the second recess, wherein, the first longitudinal spring end is retained as lateral movement between the primary importance being limited by first longitudinal wall and second longitudinal wall and the second place that limited by the internal surface of guidance field.

Spring can comprise towards the internal surface of eccentric crank pin and the outer surface contrary with internal surface.The first longitudinal spring end can comprise other protuberance, and this other protuberance is extending outwardly on the other end face that is limited to first longitudinal lining end between the first protuberance and the second protuberance and from outer surface in side direction.

The second longitudinal spring end can comprise the 3rd protuberance and the 4th protuberance, wherein, the 3rd protuberance laterally extends and extends in the 3rd recess being limited by second longitudinal lining end from the first lateral springs end, and the 4th protuberance laterally extends and extends in the 4th recess being limited by second longitudinal lining end from the second lateral springs end contrary with the first lateral springs end.

Lining can comprise the inclined inner surface that limits at least in part longitudinal extension opening.The first longitudinal spring end can engage with this inclined surface and can when the first longitudinal spring end vertically moves along inclined surface, to eccentric crank pin, apply variable load on spring.The first spring can be towards the center of longitudinal extension opening along the longitudinal the longitudinal extent of extension body be roughly convex.This spring can comprise towards the internal surface of eccentric crank pin and the outer surface contrary with internal surface.The first longitudinal spring end can comprise from outer surface and extends outwardly into the protuberance the end face being limited by first longitudinal lining end.

By description provided in this article, other applicable territories will become obvious.The description of this section and concrete example are only intended to the object of explanation and are not intended to limit the scope of the present disclosure.

Accompanying drawing explanation

Accompanying drawing described herein is only selected mode of execution to be described but not all possible mode of execution, and is not intended to limit the scope of the present disclosure.

Fig. 1 is the sectional view according to compressor of the present disclosure;

Fig. 2 is the stereogram of the unloader bush assembly of Fig. 1;

Fig. 3 is another stereogram of the unloader bush assembly of Fig. 1;

Fig. 4 is the stereogram of the spring of the unloader bush assembly shown in Fig. 2 and Fig. 3;

Fig. 5 is according to the stereogram of the first substituting unloader bush assembly of the present disclosure;

Fig. 6 is according to the sectional view of the second substituting unloader bush assembly of the present disclosure;

Fig. 7 is the stereogram of spring of the unloader bush assembly of Fig. 6;

Fig. 8 is according to the sectional view of the 3rd substituting unloader bush assembly of the present disclosure;

Fig. 9 is the stereogram of spring of the unloader bush assembly of Fig. 8;

Figure 10 is according to the sectional view of the 4th substituting unloader bush assembly of the present disclosure;

Figure 11 is according to the sectional view of the 5th substituting unloader bush assembly of the present disclosure; And

Figure 12 is another sectional view of the unloader bush assembly of Figure 11.

In a plurality of views of whole accompanying drawing, corresponding reference character represents corresponding parts.

Embodiment

Now with reference to accompanying drawing, example of the present disclosure is described more fully.Below description is in fact only exemplary and is not intended to limit the disclosure, application or purposes.

It is in order to make the disclosure become thorough and scope of the present utility model is conveyed to those of ordinary skills all sidedly that illustrative embodiments is provided.The many details such as concrete parts, apparatus and method have been set forth, so that the complete understanding to embodiment of the present disclosure to be provided.To it will be evident to one of ordinary skill in the art that, be not to adopt specifically details; Exemplifying embodiment mode of execution, and that a kind of situation in many different forms should not be interpreted as limiting the scope of the present disclosure.In some illustrative embodiments, do not describe known process, known apparatus structure and known technology in detail.

When an element or layer be called as be positioned at another element or layer " on ", during with another element or layer " joint ", " connection " or " connection ", it can be located immediately at another element or layer above or with another element or layer engages, is connected or connects, or can have element or layer between.By contrast, when an element is called as " be located immediately at another element or layer on ", " directly engages " with another element or layer, when " being directly connected " or " directly connection ", may not exist element between or layer.Other terms that are used for describing the relation between element should be in a similar fashion (for example, " ... between " to " directly exist ... between ", " adjacent " is to " direct neighbor " etc.) explain.As used herein, term "and/or" comprises one or more the combining arbitrarily and all in relevant lising.

Although term first, second, third, etc. can be used to describe various elements, parts, region, layer and/or portion's section in the text, these elements, parts, region, layer and/or portion's section are not limited by these terms should.These terms can only be used for an element, parts, region, layer and/or portion's section and another region, layer or portion's section to distinguish.Unless context clearly illustrates that, otherwise, such as the term of " first ", " second " and other digital terms, when using in the text, do not refer to order or order.Thereby, below the first element, parts, region, layer or the portion's section discussed in the situation that do not deviate from the teaching of illustrative embodiments, can be called as the second element, parts, region, layer or portion's section.

This teaching is suitable for being combined in many dissimilar scroll compressor and the rotary compressor that comprises closed machine, open-drive machine and non-enclosed machine.For the object of example, compressor 10 is shown as the closed-type scroll refrigeration compressor of low-side, that is, motor and the compressor suction gas cooling in enclosing housing, the vertical section as shown in Fig. 1 is shown.

With reference to Fig. 1, compressor 10 can comprise enclosing housing assembly 12, bearing case assembly 14, motor sub-assembly 16, compressing mechanism 18, black box 20 and discharge valve assembly 26.Frame set 12 can hold bearing case assembly 14, motor sub-assembly 16, compressing mechanism 18 and discharge valve assembly 26.

Frame set 12 conventionally can form compressor case and can comprise cylindrical shell 28, is positioned at the end cap 32 of the upper end of frame set 12, the separator 34 of horizontal expansion and the base portion 36 that is positioned at the lower end of frame set 12.End cap 32 and separator 34 can limit discharge chamber 38 conventionally.Discharge chamber 38 can be formed for the exhaust silencer of compressor 10 conventionally.Although be depicted as, comprise discharge chamber 38, should be understood that, the disclosure is applied to directly discharge configuration equally.Frame set 12 can limit opening 40 in end cap 32, and opening 40 forms exhaust port.Frame set 12 can additionally be limited with suction port (not shown).Separator 34 can comprise the discharge route 44 that holds discharge valve assembly 26.

Bearing case assembly 14 can comprise main bearing shell 46, bearing 48, unloader bush assembly 50 and fastening piece 52.Main bearing shell 46 can comprise central body 54, and this central body 54 has the arm 56 extending radially outwardly from central body 54.Central body 54 can comprise the hole being limited by the circumferential wall 58 around bearing 48.Arm 56 can engage that main bearing shell 46 is supported in housing 28 with housing 28.Main bearing shell 46 can be fixed to housing 28 at a plurality of somes place in any desirable mode such as riveted joint.Unloader bush assembly 50 can comprise that driving lining 60 and spring 62(are shown in Fig. 2 to Fig. 4).

Motor sub-assembly 16 can comprise motor stator 72, rotor 74 and live axle 76.Motor stator 72 can be press-fit in housing 28.Rotor 74 can be pressed and be engaged on live axle 76 and live axle 76 can be driven rotatably by rotor 74.Live axle 76 can extend through the described hole being limited by circumferential wall 58 and is supported on rotatably in main bearing shell 46 by bearing 48.

Live axle 76 can comprise the eccentric crank pin 78 on it with par 80.Driving lining 60 can be positioned on eccentric crank pin 78 and with compressing mechanism 18 engages.Spring 62 can be in driving lining 60 at the eccentric crank pin 78 that drives between lining 60 and eccentric crank pin 78 and can engages drive shaft 76.The longitudinal extent of spring 62 can be that the eccentric crank pin 78 towards live axle 76 is roughly convex.Main bearing shell 46 can limit the thrust bearing surface 82 of supports compressor structure 18.Compressing mechanism 18 can comprise and is engaged with each other the moving vortex 84 that engages and determines vortex 86.

Moving vortex 84 can comprise end plate 88, and this end plate 88 has and is located thereon lip-deep helical blade or scrollwork 90 and is positioned at the annular planar directed thrust directed thrust surfaces 92 on lower surface.Directed thrust directed thrust surfaces 92 can with main bearing shell 46 on annular planar thrust bearing surface 82 have a common boundary.Cylindrical hub 94 can be given prominence to downwards and can make to drive lining 60 to can be rotatably set in wherein from directed thrust directed thrust surfaces 92.Drive lining 60 can comprise the endoporus that holds crank pin 78.Crank pin par 80 can drive plat surface in the part of endoporus of ground engages drive lining 60 so that the drive arrangement of radial compliance to be provided.Can and determine by Euclidean joiner 96 and moving vortex 84 that vortex 86 engages in case stop vortex 84 and determine the relative rotation between vortex 86.

Determine vortex 86 and can comprise end plate 98, annular recess 104 and a series of lip part 106(Fig. 1 extending radially outwardly), wherein, end plate 98 is limited with discharge route 100 and has the spiral wraps 102 of extending from the first side of end plate 98, annular recess 104 is limited in second side contrary with the first side of end plate 98, and lip part 106 engages with fastening piece 52.End plate 98 can comprise the biasing passage (not shown) that is communicated with annular recess 104 fluids and in addition by moving vortex 84 with determine the intermediate compression chamber that vortex 86 limits.Black box 20 can form floating seal assembly and can with determine vortex 86 and engage hermetically to limit axialy offset chamber 110.

With reference to Fig. 2 to Fig. 4, driving lining 60 can comprise the outer surface 112 engaging with moving vortex 84 and longitudinally hold 116 to extend to second longitudinal longitudinal extension opening 114 of 118 of holding from first.First longitudinal end 116 can limit the first end face 120 and second and longitudinally hold 118 can limit the second end face 122.Spring 62 can be arranged in longitudinal extension opening 114 and can comprise the longitudinal extension body 124 that is arranged on the longitudinal extension opening 114 that drives lining 60.

Spring 62 can comprise internal surface 126 and outer surface 128, the first longitudinal end 134 of longitudinal end 132 and second and longitudinally hold 132 and second longitudinally to hold the first lateral ends 136 and second lateral ends 138 of extending between 134 first.At least a portion of first longitudinal end 132 can laterally be extended and longitudinally hold 116 lappings with first of driving lining 60 from body 124.At least a portion of second longitudinal end 134 can laterally be extended and longitudinally hold 118 lappings with second of driving lining 60 from body 124, spring 62 is fastened in driving lining 60.

Drive first of lining 60 longitudinally to hold 116 second recesses 142 that can be limited with the first recess 140 of the first area that comprises the first end face 120 and comprise the second area of the first end face 120.Drive second of lining 60 longitudinally to hold 118 the 4th recesses 146 that can be limited with the 3rd recess 144 of the first area that comprises the second end face 122 and comprise the second area of the second end face 122.

Drive lining 60 first longitudinally end 116 can be limited with the first guidance field 148 in the position between the first recess 140 and the second recess 142 circumferentially, the first guidance field 148 longitudinally stretches out from the end face being limited by the first recess 140 and the second recess 142, and the first guidance field 148 can be limited with the first longitudinal end 132 internal surfaces that engage 150 with spring 62.Drive lining 60 second longitudinally end 118 can be limited with the second guidance field 152 in the position between the 3rd recess 144 and the 4th recess 146 circumferentially, the second guidance field 152 longitudinally stretches out from the end face being limited by the 3rd recess 144 and the 4th recess 146, and the second guidance field 152 can be limited with the second longitudinal end 134 internal surfaces that engage 154 with spring 62.

In the example shown in Fig. 2 to Fig. 4, first of spring 62 longitudinally holds 132 can comprise the first protuberance 156 laterally extending from the first lateral ends 136 and the second protuberance 158 laterally extending from the second lateral ends 138.Second of spring 62 longitudinally holds 134 can comprise the 3rd protuberance 160 laterally extending from the first lateral ends 136 and the 4th protuberance 162 laterally extending from the second lateral ends 138.

The first protuberance 156 and the second protuberance 158 can extend to first longitudinally on first end face 120 at end 116 places of lining 60, and the 3rd protuberance 160 and the 4th protuberance 162 can extend to second longitudinally on second end face 122 at end 118 places of lining 60.More specifically, the first protuberance 156 can extend in the first recess 140, the second protuberance 158 can extend in the second recess 142, the 3rd protuberance 160 can extend in the 3rd recess 144, and the 4th protuberance 162 can extend in the 4th recess 146, so that spring 62 is longitudinally fastened in lining 60.

First of lining 60 longitudinally holds 116 can comprise the first inner longitudinal wall 164 that limits the first recess 140 and the second inner longitudinal wall 166 that limits the second recess 142.The outer end of the first recess 140 and the second recess 142 can be limited by the internal surface 150 of the first guidance field 148.Spring 62 first longitudinally end 132 can be retained as lateral movement between the primary importance being limited by the first lateral sidewall 164 and the second lateral sidewall 166 and the second place that limited by the internal surface 150 of the first guidance field 148.Second of lining 60 longitudinally holds 118 can comprise the 3rd inner longitudinal wall 168 that limits the 3rd recess 144 and the 4th inner longitudinal wall 170 that limits the 4th recess 146.The outer end of the 3rd recess 144 and the 4th recess 146 can be limited by the internal surface 154 of the second guidance field 152.Spring 62 second longitudinally end 134 can be retained as lateral movement between the 3rd position being limited by the 3rd longitudinal wall 168 and the 4th longitudinal wall 170 and the 4th position that limited by the internal surface 154 of the second guidance field 152.

Many modification about the layout shown in Fig. 2 to Fig. 4 have been shown in Fig. 5 to Figure 12.Alternative arrangements shown in Fig. 5 to Figure 12 can comprise and the similar feature of the layout shown in Fig. 2 to Fig. 4, and will no longer describe common feature for simplicity.Should be understood that, the description of common trait is equally applicable to the layout shown in Fig. 5 to Figure 12, below except.

As viewed in Fig. 5, drive the second end 318 of lining 260 can comprise the 3rd recess 344 and the 4th recess 346 that extends to the longitudinal extension opening 314 that drives lining 260 from outer surface 312 completely.The projection 368,370 that the 3rd longitudinal wall 168 of Fig. 2 to Fig. 4 and the 4th longitudinal wall 170 can be extended by each the base portion from the 3rd recess 344 and the 4th recess 346 substitutes.Spring 262 second longitudinally end 334 can be retained as lateral movement between the position being limited by projection 368,370 and the position that limited by the internal surface 354 of the second guidance field 352.Be similar to one group of projection (not shown) of projection 368,370 can be replaced property ground or be additionally included on the first end 316 that drives lining 260.

In the layout shown in Fig. 6 and Fig. 7, driving lining 460 can comprise second longitudinal end 518 of remodeling, and spring 462 can comprise second longitudinal end 534 of corresponding remodeling.Drive second of lining 460 longitudinally to hold 518 can comprise that the central indentation 540 that is limited with the second end face 522 is with the 3rd recess 144, the 4th recess 146 and the second guidance field 152 in alternate figures 2 to Fig. 4.Second of spring 462 longitudinally holds 534 can comprise that the 3rd protuberance 560 is with the 3rd protuberance 160 in alternate figures 2 to Fig. 4 and the 4th protuberance 162.The 3rd protuberance 560 can form hook formation and can from the outer surface 528 of spring 462, extend outwardly into central indentation 540 and extend on the second end face 522 being limited by lining 460, so that spring 462 is longitudinally remained in lining 460.

The driving lining 660 of Fig. 8 and Fig. 9 and spring 662 can be similar with the layout shown in Fig. 6 and Fig. 7, wherein, and in the layout of Fig. 8 and Fig. 9, to driving first longitudinal end 716 of lining 660 and first longitudinal end 734 of spring 662 to retrofit.Drive first longitudinal end 716 of lining 660 can comprise other recess 772, recess 772 forms the first guidance fields 748 and is limited with and drives first of lining 660 longitudinally to hold the other end face 774 at 716 places.Other recess 772 can limit the internal surface 750 of the first guidance field 748.This internal surface 750 can be included in longitudinally upper the first longitudinal longitudinal first area 776 between end 718 and longitudinal end of 776 extends to and drives first of lining 660 longitudinally to hold 716 second area 778 from first area of end 716 and second driving lining 660.First area 776 can be roughly parallel to and drive lining 660 longitudinal axis to extend, and second area 778 can be from first area 776 extends radially outwardly with an angle.

First of spring 662 longitudinally holds 734 can be included in the other protuberance 780 between the first protuberance 756 and the second protuberance 758 in side direction, and protuberance 780 can extend outwardly into other recess 772 and extend on other end face 774 from the outer surface 728 of spring 662.First other protuberance 780 can engage with the first area 776 of internal surface 750, for spring 662 provides initial stiffness or effective length.At spring 662, due to eccentric crank pin 78 after deflection prearranging quatity, other protuberance 780 can vertically move through first area 776 and arrive second area 778, and in second area 778, other protuberance 780 no longer engages with internal surface 750.As an alternative, the first protuberance 756 can engage with the outer end 782 of the first recess 740 and the second protuberance 758 can engage with the outer end (not shown) of the second recess, so that the spring rate that reduces or the spring effective length of increase to be provided.

Layout shown in Figure 10 can be similar to the layout shown in Fig. 8 and Fig. 9, wherein, in layout shown in Figure 10, lining 860 comprises the internal surface 950 of the remodeling of the first guidance field 948, variable rigidity or variable effective length are provided to spring 862.More specifically, internal surface 950 can comprise first longitudinal end 916 inclined surfaces that extend radially outwardly with an angle towards lining 860.Other protuberance 980 can continuous contact internal surface 950, to deflect at spring 862 and to change spring rate or the effective length that is applied to eccentric crank pin 78 when other protuberance 980 is advanced along the longitudinal extent of internal surface 950.

Layout shown in Figure 11 and Figure 12 comprises other stiffness variable layout.Layout shown in Figure 11 and Figure 12 can be similar to the layout of Fig. 6 and Fig. 7, wherein, in the layout shown in Figure 11 and Figure 12, at first of spring 1062, longitudinally holds 1134 places to increase the 3rd protuberance 1180 and the 4th protuberance 1182.Drive the longitudinal extension opening 1114 of lining 1060 can comprise the other

internal surface

1184,1186 of Strategic Lateral Offset each other.The first other internal surface 1184 can be positioned in the first lateral ends 1136 of spring 1062 and engage with the 3rd protuberance 1180, and the second other internal surface 1186 can be positioned in the second lateral ends 1138 of spring 1062 and engage with the 4th protuberance 1182.

Other

internal surface

1184,1186 can extend out to the first guidance field 1148 with an angle side direction in each region in the longitudinal extension opening 1114 that drives lining 1060.Longitudinal extension opening 1114 can limit from the laterally offset of other internal surface the 1184,1186 to first guidance field 1148.The 3rd protuberance 1180 can engage with other internal surface 1184 at first, and the 4th protuberance 1182 can engage with other internal surface 1186 at first.When spring 1062 is during because of eccentric crank pin 78 deflection, the 3rd protuberance 1180 and the 4th protuberance 1182 longitudinally advance and the angular orientation of

internal surface

1184,1186 based on other changes spring rate along other

internal surface

1184,1186.

After the 3rd protuberance 1180 and the 4th protuberance 1182 vertically move through other

internal surface

1184,1186, the 3rd protuberance 1180 and the 4th protuberance 1182 no longer engage with driving lining 1060.As an alternative, the first protuberance 1156 can engage with the outer end 1188 of the first recess 1140 and the second protuberance 1158 can engage with the outer end 1190 of the second recess 1142, so that the spring rate that reduces or the effective spring length degree of increase to be provided.

Claims

1. A compressor, comprising:

case;

a bearing housing supported within the housing;

an orbiting scroll supported on said bearing housing;

a non-orbiting scroll meshingly engaged with said orbiting scroll;

An unloader bushing assembly, the unloader bushing assembly comprising:

a drive bushing having an outer surface engaged with the orbiting scroll and defining a longitudinally extending opening extending from a first longitudinal bushing end to a second longitudinal bushing end, and

a spring comprising a longitudinally extending body disposed within the longitudinally extending opening of the drive bushing and having a first longitudinal spring end and a second longitudinal spring end, wherein the first longitudinal spring At least a portion of an end extends laterally from the body and overlaps the first longitudinal bushing end, and at least a portion of the second longitudinal spring end extends laterally from the body and overlaps the second longitudinal bushing end. ends overlap to secure the spring within the drive bushing; and

A drive shaft extends through the bearing housing and includes an eccentric crank pin disposed within the longitudinally extending opening of the drive bushing and engaged with the spring.

2. The compressor of claim 1, wherein said first longitudinal spring end includes a first protrusion extending laterally from said first lateral spring end and extending from said first lateral spring end opposite said first lateral spring end. A second protrusion extending laterally from a second lateral spring end of the second spring end, the first protrusion and the second protrusion extending onto a first end surface defined by the first longitudinal bushing end.

3. The compressor of claim 2, wherein said second longitudinal spring end includes a third protrusion extending laterally from said first lateral spring end and a third protrusion extending laterally from said second lateral spring end. A laterally extending fourth protrusion, the third protrusion and the fourth protrusion extend onto a second end face defined by the first longitudinal bushing end.

4. The compressor of claim 2, wherein the spring includes an inner surface facing the eccentric crank pin and an outer surface opposite the inner surface, the second longitudinal spring end including a third protrusion, the The third protrusion extends outwardly from the outer surface to a second end surface defined by the second longitudinal bushing end.

5. The compressor of claim 2, wherein said first longitudinal bushing end defines a first recess and a second recess, said first recess comprising a first region of said first end face, said A second recess comprises a second region of the first end surface, wherein the first protrusion extends into the first recess and the second protrusion extends into the second recess.

6. The compressor of claim 5, wherein the drive bushing defines a guide area at a location circumferentially between the first recess and the second recess, the guide area from An end surface defined by the first and second recesses extends longitudinally outward, and the guide region defines an inner surface that engages the first longitudinal spring end.

7. The compressor of claim 6, wherein the drive bushing includes a first longitudinal wall extending from the first recess and a second longitudinal wall extending from the second recess, wherein the A first longitudinal spring end is retained for lateral movement between a first position defined by the first and second longitudinal walls and a second position defined by the inner surface of the guide region.

8. The compressor of claim 5, wherein said spring includes an inner surface facing said eccentric crank pin and an outer surface opposite said inner surface, said first longitudinal spring end comprising a further protrusion , the further protrusion is located laterally between the first protrusion and the second protrusion, and the further protrusion extends outwardly from the outer surface to a The other end face at the sleeve end.

9. The compressor of claim 2, wherein said second longitudinal spring end includes a third protrusion and a fourth protrusion, said third protrusion laterally extending from said first lateral spring end extending into and into a third recess defined by said second longitudinal bushing end, said fourth protrusion extending laterally from said second lateral spring end opposite said first lateral spring end and extend into a fourth recess defined by said second longitudinal bushing end.

10. The compressor of claim 1 , wherein said drive bushing includes an angled inner surface at least partially defining said longitudinally extending opening, said first longitudinal spring end engaging said angled surface and at said A variable spring load is applied to the eccentric crank pin as the first longitudinal spring end moves longitudinally along the inclined surface.

11. The compressor of claim 1, wherein said spring is generally convex along a longitudinal extent of said longitudinally extending body toward a center of said longitudinally extending opening.

12. The compressor of claim 1, wherein the spring includes an inner surface facing the eccentric crank pin and an outer surface opposite the inner surface, the first longitudinal spring end including an outer surface extending outwardly from the outer surface. A protrusion extending to an end face defined by said first longitudinal bushing end.