JP2022170724A - Scroll pump with floating motor coupler - Google Patents

Abstract

To provide a scroll pump with a floating motor coupler.SOLUTION: A scroll pump includes first and second scroll members connected together by a plurality of idler assemblies configured to allow the second scroll member to move in an orbiting path relatively to the first scroll member. A rotary bearing is connected to an end plate of the orbiting scroll member. A motor and a motor coupler are coupled to the rotary bearing to move the bearing in an orbiting path corresponding to the orbiting path followed by the second scroll member. The rotary bearing may roll freely within the coupler.SELECTED DRAWING: Figure 1

Description

This application claims the benefit, under 35 U.S.C. It is something to do.

A known scroll pump has a fixed scroll member with a fixed involute and an orbiting scroll member with an orbiting involute. An orbiting involute is connected to the stationary scroll member by three idler assemblies. An idler assembly is configured to enable movement of the orbiting scroll member relative to the fixed scroll within the orbital path. Each idler assembly has a camshaft having a first shaft portion and a second shaft portion parallel to the first shaft and radially offset from the first shaft portion. A first shaft portion is rotatably received in a corresponding aperture defined by the fixed scroll member proximate a peripheral area of the fixed scroll member, i.e., outside the fixed involute, and a second shaft portion extends along the orbit. Proximate the peripheral area of the orbiting scroll member, ie, outside the orbiting involute, it is rotatably received in corresponding apertures defined by the orbiting scroll member. As the first shaft portion rotates within the corresponding aperture of the fixed scroll member, the second shaft portion rotates within the corresponding aperture of the orbiting scroll member. As a result, the second shaft of the idler crank orbits about the first shaft of the idler crank in a path corresponding to the orbiting path taken by the orbiting scroll member as it moves relative to the fixed scroll. swirl.

A scroll pump is coupled to the motor shaft of the motor through an intervening coupler. A motor is fixed relative to the fixed scroll member. A coupler has an output shaft parallel to and radially offset from the motor shaft. An output shaft is rotatably received in corresponding holes defined by the orbiting scroll member near the center of the orbiting scroll member. As the motor shaft rotates relative to the motor, the coupler output shaft rotates in corresponding holes defined by the orbiting scroll member and the coupler output shaft rotates relative to the fixed scroll member. orbits about the motor shaft in a path corresponding to the orbital path taken by the . This motion of the output shaft causes the orbiting scroll member to orbit relative to the fixed scroll member, as discussed above.

Those skilled in the art will recognize that the above arrangement of the idler assembly and coupler constrains the orbiting scroll member to the fixed scroll member and to the motor at four locations. More specifically, an orbiting scroll member is constrained to a fixed scroll member by three idler assemblies, and an orbiting scroll member is constrained to the motor by a coupler. This high degree of constraint ensures that maximum dimensional control and tight tolerances are adhered to in the manufacture and assembly of the above components to avoid premature component wear and excessive sticking of the scroll pump assembly. need to

Further, the fixed scroll member and the orbiting scroll member are kept very close together without touching each other (except through intervening seals) so that the scroll pump operates reliably and efficiently. must be maintained. This goal is usually achieved by installing a shim of appropriate thickness on the camshaft of the idler assembly. Selecting the appropriate shim can involve significant trial and error. For example, a common approach to selecting a suitable shim is to estimate a first suitable shim thickness, test the orbiting scroll against the orbiting scroll using a first shim of corresponding thickness. determining if the first shim is too thick or too thin; and repeatedly test-fitting the orbiting scroll. This process can be time consuming and repeated assembly and disassembly can damage the scroll pump.

The present disclosure is directed to scroll pumps in which the degree of constraint between a fixed scroll member and an orbiting scroll member is reduced. The present disclosure is further directed to processes for simplifying the assembly process described above.

1 is a perspective view of an exemplary scroll pump having a fixed scroll member, an orbiting scroll member, a pump housing, and a motor in accordance with the present disclosure; FIG. 2 is a perspective view of the scroll pump of FIG. 1 with the pump housing removed to show coupling of the scroll pump motor to the orbiting scroll member of the scroll pump by a coupler; FIG. Figure 2 is a perspective view of the scroll pump of Figure 1 with the fixed scroll member and the orbiting scroll member removed; FIG. 4 is a perspective view showing an orbiting scroll member; 2 is an exploded perspective view of the scroll pump of FIG. 1; FIG. 2 is a side cross-sectional view of the scroll pump of FIG. 1; FIG. FIG. 3 is an end view of an exemplary coupler according to this disclosure; 7B is a perspective view of the coupler of FIG. 7A; FIG. FIG. 4B is an end view of another exemplary coupler according to the present disclosure; 8B is a perspective view of the coupler of FIG. 8A; FIG. 2 is a cross-sectional view of a portion of the scroll pump of FIG. 1; FIG. Figure 2 is a perspective view of the components of the idler assembly of the scroll pump of Figure 1; Figure 2 is a perspective view of the components of the idler assembly of the scroll pump of Figure 1; Figure 2 is a perspective view of the components of the idler assembly of the scroll pump of Figure 1; 2 is a top view of an orbiting scroll member of the scroll pump of FIG. 1; FIG.

The drawings show an exemplary embodiment of a scroll pump 100 according to this disclosure.

A scroll pump 100 includes a pump housing 102, a first or fixed scroll member 104 fixedly attached to the pump housing 102, and a second or track in orbitable engagement with the fixed scroll member 104. It has an orbiting scroll member 106 and a motor 108 fixedly connected to the pump housing 102 and operably engaged with the orbiting orbiting scroll member 106 . A rotary bearing 110 having a desired radius and diameter is rotatably connected to orbiting scroll member 106 near a central portion of orbiting scroll member 106 . Coupler 112 is fixedly connected to motor shaft 109 of motor 108 and operably engages rotary bearing 110, as will be further discussed below.

Pump housing 102 has a side wall 114 and an end wall 116 covering a first end of side wall 114 . Sidewall 114 defines a plurality of registration tabs 115 extending axially away from end wall 116 . End wall 116 defines an opening 118 that receives coupler 112 therethrough. A motor 108 is fixedly connected to the first end of the housing 102 and a fixed scroll member 104 is fixedly connected to the second end of the housing 102 opposite the first end of the housing. As shown, the motor 108 is fixedly connected to the first side of the end wall 116 opposite the side wall 114 and the fixed scroll member 104 is mounted on the side wall 114 opposite the first end of the side wall 114 . Fixedly connected to the second end. Alternatively, motor 108 and fixed scroll member 104 may be fixedly connected to each end of housing 102 differently.

A fixed scroll member 104 has a first or fixed scroll or involute 120 extending axially from a central portion of a first or fixed end plate 122 . A first or stationary seal 120 S is disposed at the free end of the stationary involute 120 opposite the stationary end plate 122 . A free end of stationary involute 120 may define a groove configured to receive stationary seal 120S. Fixed end plate 122 defines three openings 124 configured to receive corresponding rotary bearings 136 of corresponding idler assemblies 132, as further discussed below.

Orbiting scroll member 106 has a second or orbiting scroll or involute 126 extending axially from a central portion of a second or orbiting end plate 128 . A second or swivel seal 126 S is disposed at the free end of the orbital swivel involute 126 opposite the orbital swivel end plate 128 . A free end of the orbital swivel involute 126 may define a groove configured to receive an orbital swivel seal 126S. Orbiting involutes 126 are configured to receive fixed involutes 120 in alternating and orbiting engagement. Orbit swivel end plate 128 defines three openings 130 configured to receive corresponding rotary bearings 138 of corresponding idler assemblies 132, as further discussed below. The orbiting pivot end plate 128 further defines a plurality of alignment slots 133 configured to receive the alignment tabs 115 in axial slidable engagement.

As suggested above, fixed scroll member 104 is operably connected to orbiting scroll member 106 by three idler assemblies 132 . Each idler assembly 132 has an idler camshaft 134 , a first rotary bearing assembly 136 and a second rotary bearing assembly 138 .

Each of the idler camshafts 134 has a first shaft portion 140 and a second shaft portion 142 parallel to and radially spaced from the first shaft portion 140 . First shaft portion 140 is received in corresponding openings defined by first rotary bearing assembly 136 such that first shaft portion 140 is axially secured to first rotary bearing assembly 136 . be done. A second shaft portion 142 is received within an opening defined by the second rotary bearing assembly 138 . A second shaft portion 142 is axially captured to the second rotary bearing assembly by a suitable fastener 146, which may be, for example, without limitation, a threaded fastener.

A first rotary bearing assembly 136 has a first rotary bearing 136A and a second rotary bearing 136B. Each of the first rotary bearing 136A and the second rotary bearing 136B has an annular outer bearing race that is received in a corresponding opening 124 in the fixed scroll member 104 in press-fitting engagement. The annular outer bearing race of the second bearing 136B further has a flange 137 extending radially outwardly from its body. Flanges 137 limit the extent to which the annular outer bearing race of the second bearing can be inserted into corresponding openings 124 .

Similarly, a second rotary bearing assembly 138 has a first rotary bearing 136A and a second rotary bearing 136B. Each of the first rotary bearing 138A and the second rotary bearing 138B has an annular outer bearing race that is received in a corresponding opening 130 in the orbiting scroll member 106 in press-fitting engagement. The annular outer bearing race of the second bearing 138B further has a flange 139 extending radially outwardly from its body. Flanges 139 limit the extent to which the annular outer bearing race of the second bearing can be inserted into corresponding openings 130 .

A first shaft portion 140 of idler camshaft 134 is configured to rotate within a rotary bearing of fixed scroll member 104 about a first axis of rotation. A second shaft portion 142 of the idler camshaft rotates the orbiting scroll member 106 about a second axis of rotation parallel to and radially offset from the first axis of rotation. configured to rotate in bearings. The second shaft portion 142 of the idler camshaft 134 is radially offset relative to the first shaft portion 140 of the idler camshaft 130 such that when the idler camshaft rotates, the orbiting scroll member 106 is rotated. will move relative to the fixed scroll member 104 in an orbital path.

As noted above, a rotary bearing 110 is rotatably connected to orbiting scroll member 106 near a central portion of orbiting scroll member 106 . More specifically, rotary bearing 110 is rotatably connected to an axle 146 that extends perpendicularly from a central portion of plate 128 of orbiting scroll member 106 on the opposite side of orbiting scroll 126 . A rotary bearing 110 has an axis of rotation that is parallel to the compression surface of the orbiting scroll 120 and perpendicular to the plate 122 of the fixed scroll member 104 . As mentioned above, rotary bearing 110 engages coupler 112 .

As best shown in FIGS. 7A-8B, coupler 112 has a base 148 and sidewalls 150 extending from a first side of base 148 . As shown, sidewall 150 is U-shaped. In other embodiments, sidewall 150 can have other shapes, such as curvilinear shapes or rectangular shapes. Base 148 of coupler 112 defines an opening 152 configured to receive motor shaft 109 of motor 108 . A base 148 of coupler 112 is keyed or otherwise secured to motor shaft 109 for rotation therewith.

A sidewall 150 defines an open end 154 and an interior surface 156 . In some embodiments, open end 154 may be a closed end. An inner surface 156 has a first bearing surface 156A and a second bearing surface 156B spaced from and opposite the first bearing surface 156A. As shown, the first bearing surface 156A is flat. As shown, the second bearing surface 156B is flat, parallel to, and spaced from the first bearing surface 156A. As shown, each of first bearing surface 156A and second bearing surface 156B are parallel to a plane tangent to the outer surface of rotary bearing 110 . The inner surface 156 further has a third bearing surface 156C connecting the first bearing surface 156A and the second bearing surface 156B. As shown, the third bearing surface 156C is flat.

As shown in FIGS. 7A and 7B, the third bearing surface 156C may be perpendicular to the first bearing surface 156A and the second bearing surface 156B. Alternatively, as shown in FIGS. 8A and 8B, the first included angle α between the first bearing surface 156A and the third bearing surface 156C may be greater than or equal to 90 degrees or less. Similarly, a second included angle β between the second bearing surface 156B and the third surface region 156C may be less than or greater than 90 degrees. A first angle α and a second angle β are such that the first bearing surface 156A, the second bearing surface 156B, and may be selected to better guide the forces exerted on the rotary bearing 110 by the third bearing surface 156C.

Although first bearing surface 156A, second bearing surface 156B, and third bearing surface 156C are shown as flat, any or all of these may be curved. Further, any or all of the first bearing surface 156A, the second bearing surface 156B, and the third bearing surface 156C may be aligned with the first bearing surface 156A, the second bearing surface 156B, and the third bearing surface 156C by curved connecting surfaces as shown, or by flat connecting surfaces. It may be connected to an adjacent one of bearing surface 156A, second bearing surface 156B, and third bearing surface 156C. Curved connecting surfaces connecting the first bearing surface 156A, the second bearing surface 156B, and the third bearing surface 156C are the first bearing surface 156A, the second bearing surface 156B, and the third bearing surface. 156C and between the first bearing surface 156A, the second bearing surface 156B, and the third bearing surface 156C, and/or by the bearing. It may have a radius of curvature nominally equal to the radius of rotary bearing 110 to avoid or reduce shock loads imposed on the coupler or vice versa. As suggested above, the shape and relative orientation of first bearing surface 156A, second bearing surface 156B, and third bearing surface 156C may cause rotation as coupler 112 rotates about rotary bearing 110. selected to better guide the forces exerted on rotary bearing 110 by first bearing surface 156A, second bearing surface 156B, and third bearing surface 156C in a direction perpendicular to bearing 110; can be

In either case, to allow rotary bearing 110 to rotate freely on bearing surfaces 156A, 156B, 156C as coupler 112 rotates with motor shaft 109, and to allow rotary bearing 110 and bearing The first bearing surface 156A and the second bearing surface 156B are separated from each other by a distance sufficiently greater than the outer diameter of the rotary bearing 110 to reduce or eliminate sticking between the surfaces 156A, 156B, 156C. be.

As noted above, base 148 defines opening 152 configured to receive motor shaft 109 . An opening 152 is adjacent the open end 154 of the side wall 150 and is spaced from the third bearing surface 156C of the side wall 150 . Coupler 112 is eccentrically offset from motor shaft 109 because opening 152 is near open end 154 of side wall 150 and away from third bearing surface 156C of side wall 150 . This configuration allows the coupler 112 to counteract reaction forces resulting from the motion of the orbiting scroll member 106 . In an embodiment (not shown), an additional compensation member (not shown) may be provided at the opposite end of the motor 108, although such additional compensation member would otherwise be can be substantially smaller than would otherwise be required, allowing the scroll pump 100 to be smaller and lighter than would otherwise be possible.

In operation, motor 108 is energized to rotate motor shaft 109 . Motor shaft 109 then rotates coupler 112 . Bearing surfaces 156A, 156B, 156C of coupler 112 engage the outer surface of slewing bearing 110 such that as coupler 112 rotates, slewing bearing 110 rotates on bearing surfaces 156A, 156B, 156C to rotate bearing surfaces 156A, 156B. , 156C. This interaction causes rotary bearing 110 to move relative to fixed scroll member 104 in an orbiting path, thereby causing orbiting scroll member 106 to move relative to fixed scroll member 104 in an orbiting path. become.

The shapes and relative orientations of first bearing surface 156A, second bearing surface 156B, and third bearing surface 156C are such that coupler 112 is first rotated about rotary bearing 110, as discussed above. or in a direction perpendicular to the rotary bearing 110 when turning in the second rotational direction, the first bearing surface 156A, the second bearing surface 156B, and the third bearing surface 156C rotate against the rotary bearing 110 It can be chosen to better guide the applied force.

9-11 illustrate certain features of an embodiment of scroll pump 100 that can assist in assembling scroll pump 100 and establishing clearance between fixed scroll member 104 and orbiting scroll member 106. FIG. best show. More specifically, FIG. 9 includes a portion of fixed scroll member 104, orbiting scroll member 106, idler camshaft 134, first bearing assembly 136, and second bearing assembly 138. One of the idler assemblies 132 is shown. A first bearing assembly 136 is received within the corresponding opening 124 of the fixed scroll member 104 and a first shaft portion 140 of the idler camshaft 134 is received within the first bearing assembly 136 . . Similarly, a second bearing assembly 138 is received in a corresponding opening 130 of the orbiting scroll member 106 and a second shaft portion 142 of the idler camshaft 134 engages the second bearing assembly 138 . received inside.

A flange 137 on the first bearing assembly 136 prevents the first bearing assembly 136 from being pulled toward the orbiting scroll member 106 through the opening 124 .

A retainer (and optional washer) 158 secured to the first end 140 of the idler camshaft 134 prevents the idler camshaft 134 from being pulled through the first bearing assembly 136. do. As shown, fastener 158 is a threaded fastener that engages a complementary threaded hole 160 in first end 140 of idler camshaft 134 .

Similarly, flange 139 of second bearing assembly 138 prevents second bearing assembly 138 from being pulled through opening 130 toward fixed scroll member 104 .

Second shaft portion 142 of idler camshaft 134 defines bore 162, as best shown in FIGS. 9 and 10A-10C. A portion of bore 162 opposite the free end of second shaft portion 142 is threaded. The second shaft portion 142 defines a pair of diametrically opposed slits 164 extending from the free end of the second shaft portion 142 toward the first shaft portion 140 . A slit 164 axially divides the second shaft portion 142 into a first section 142A and a second section 142B near the free end of the second shaft portion 142 . In some embodiments, more or fewer slits 164 may be provided to define more or fewer sections 142x of second shaft portion 142. As shown in FIG.

A locking wedge 166 having a tapered outer radial surface 168 , for example tapered as a cone, is configured to insert its tapered end into the bore 162 defined by the second shaft portion 142 . be. A screw fastener 170 having a shoulder 172 is configured to be inserted through an axially extending aperture 174 through locking wedge 166 such that shoulder 172 of fastener 170 bears against engagement. It can be abutted against the end surface 176 in a mating fashion. In this case, screw fastener 170 may be loosely threaded into the threaded portion of bore 162 .

Referring to FIG. 11, orbiting scroll member 106 may be assembled to fixed scroll member 104 with removable shims S to set the desired clearance between fixed scroll member 104 and orbiting scroll member 106 . For example, three or more shims S of suitable thickness are provided between fixed scroll member 104 and orbiting scroll 126, for example, between fixed end plate 122 and the free end of orbiting scroll 126 adjacent orbiting orbiting seal 126S. It may be disposed between adjacent surfaces of orbiting scroll member 106 . With fixed scroll member 104 and orbiting scroll member 106 and shim S thus assembled, screw fastener 170 may be further screwed into hole 162 so that shoulder 162 of fastener 170 is locked. moving the wedge 166 into the bore 162, thereby radially expanding the first section 142A and the second section 142B of the second shaft portion 142, bearing 138A of the second bearing assembly 138; 138B in locking engagement radially outwardly with one or both inner races. With locking wedge 166 thus engaged in second bearing assembly 138, fixed scroll member 104 and orbiting scroll member 106 are locked at the desired clearance therebetween. In this case, the shims S may be removed from the assembled fixed scroll member 104 and orbiting scroll member 106, for example, by pulling the shims S out from between the fixed scroll member 104 and the orbiting scroll member 106.

Alternatively, the desired clearance between the fixed scroll member 104 and the orbiting scroll member 106 can be set by using an assembly locking device, as understood by those skilled in the art, and screw fasteners 170 can be screwed into hole 162 to move locking wedge 166 into hole 162 as discussed above.

The first section 142 and the second section 142B of the second shaft portion 142 are expanded radially outwardly as described above to accommodate the inner races of one or both of the bearings 138A, 138B of the second bearing assembly 138. The locking engagement with may be permanent. That is, the expansion as described above may be plastic expansion such that even if the screw fastener 170 is removed from the hole 162, the first section 142A and the second section 142A of the second shaft portion 142 will remain open. section 142B remains in locking engagement with the second bearing assembly 138. As shown in FIG. In such embodiments, the integrally assembled fixed scroll member 104 and orbiting scroll member 106 cannot be easily disassembled.

Alternatively, the enlarging as described above causes the first section 142A and the second section 142B of the second shaft portion 142 to be aligned with the second bearing assembly when the screw fasteners 170 are removed from the holes. It may be a plastic expansion such that it does not remain in locking engagement with 138 . In such embodiments, the integrally assembled fixed scroll member 104 and orbiting scroll member 106 may be more easily disassembled.

The foregoing description and corresponding drawings refer to one or more exemplary embodiments of scroll pumps according to this disclosure. These examples are illustrative and not limiting. Those skilled in the art will recognize that the disclosed embodiments can be modified in a number of ways without departing from the scope of the invention defined by the appended claims.

Claims (18)

A scroll pump with:
a pump housing;
a fixed scroll member fixedly connected to the pump housing;
an orbiting scroll member floatably received within said pump housing and orbitingly engaged with said fixed scroll member;
a rotary bearing rotatably connected to said orbiting scroll member, said rotary bearing having a radius and diameter and an axis of rotation;
A motor fixedly connected to the housing, the motor comprising a motor shaft, the motor shaft being parallel to and diametrically from the axis of rotation of the slewing bearing. a motor having an axis of rotation that is directionally offset;
a coupler fixedly connected to the motor shaft and operably engaged with the rotary bearing;
said coupler comprising a sidewall having an inner surface, said inner surface of said coupler engaging a corresponding bearing surface of said rotary bearing;
said rotary bearing is unconstrained by said coupler in at least one direction perpendicular to said axis of rotation of said motor shaft;
rotation of the coupler orbits the rotary bearing and the orbiting scroll member relative to the fixed scroll member;
scroll pump. 2. The scroll pump of claim 1, wherein said inner surface of said coupler has a first bearing surface and a second bearing surface spaced from said first bearing surface. 2. The scroll pump of claim 1, wherein said inner surface of said coupler has a third bearing surface extending in a direction from said first bearing surface to said second bearing surface. The inner surface of the coupler has a third bearing surface extending between the first bearing surface and the second bearing surface to connect the first bearing surface to the second bearing surface. 4. The scroll pump of claim 3, further comprising: 5. The scroll pump of claim 4, wherein said first bearing surface, said second bearing surface and said third bearing surface are connected together by at least one curvilinear connecting surface. 5. The scroll pump of claim 4, wherein said at least one curvilinear connecting surface has a radius nominally equal to said diameter of said rotary bearing. 5. A scroll pump according to claim 4, wherein said first bearing surface is parallel to a tangential plane of said rotary bearing and said second bearing surface is parallel to said first bearing surface. 8. The scroll pump of claim 7, wherein said third bearing surface is perpendicular to at least one of said first bearing surface and said second bearing surface. 8. The scroll pump of claim 7, wherein said third bearing surface is perpendicular to said first bearing surface and said second bearing surface. The third bearing surface is oriented at a first included angle greater than 90 degrees to the first bearing surface, and the second bearing surface is less than 90 degrees to the first bearing surface. 8. The scroll pump of claim 7 oriented at two included angles. The vertical distance between the first bearing surface of the coupler and the second bearing surface of the coupler is nominally greater than the diameter of the slewing bearing so that the slewing bearing 8. A scroll pump according to claim 7, free to rotate on one bearing surface and said second bearing surface. 2. The scroll pump of claim 1, wherein said coupler has a weight to offset unbalanced centrifugal forces exerted on said coupler by said orbiting scroll during operation of said scroll pump. A method of assembling a scroll pump comprising:
providing a first scroll member having a first end plate and a first involute extending from the first involute;
providing a second scroll member having a second end plate and a second involute extending from the second involute;
providing a plurality of idler camshafts each having a first shaft portion and a second shaft portion;
mounting said first shaft portion of said idler camshaft to said first scroll member;
axially securing said first shaft portion of said idler camshaft to said first scroll member;
providing a shim having a thickness corresponding to a predetermined clearance between said first end plate and said second involute;
moving the second scroll member to the first scroll member with the first end plate adjacent the second involute and the second end plate adjacent the first involute; attaching to;
installing the shim between the first scroll member and the second scroll member to set the predetermined clearance between the first end plate and the second involute; ;
mounting said second shaft portion of said idler camshaft to said second scroll member;
The second shaft portion of the idler camshaft is extended to the second scroll member by enlarging the end of the idler camshaft where it contacts an axially fixed bearing connected to the second scroll member. axially securing to the second scroll member. 14. The method of claim 13, further comprising removing the shim. 15. The step of claim 14, wherein axially securing the idler assembly to the second scroll member comprises removably axially securing the idler assembly to the second scroll member. Method. 15. The step of claim 14, wherein axially securing the idler assembly to the second scroll member comprises permanently axially securing the idler assembly to the second scroll member. Method. A method of assembling a scroll pump comprising:
providing a first scroll member having a first end plate and a first involute extending from the first involute;
providing a second scroll member having a second end plate and a second involute extending from the second involute;
providing a plurality of idler camshafts each having a first shaft portion and a second shaft portion;
mounting said first shaft portion of said idler camshaft to said first scroll member;
axially securing said first shaft portion of said idler camshaft to said first scroll member;
said first end plate adjacent said second involute and said second end plate with a predetermined clearance between said first end plate and said second involute; attaching the second scroll member to the first scroll member with the adjacent the first involute;
mounting said second shaft portion of said idler camshaft to said second scroll member;
The second shaft portion of the idler camshaft is extended to the second scroll member by enlarging the end of the idler camshaft where it contacts an axially fixed bearing connected to the second scroll member. axially securing to the second scroll member. providing a fixture configured to retain the first scroll member and the second scroll member with the predetermined clearance between the first end plate and the second involute; and
mounting the first scroll member within the fixation device;
18. The step of claim 17, further comprising mounting said second scroll member within said fixed device with said predetermined clearance between said first end plate and said second involute. the method of.

Images