JPS5928090A - Scroll compressor - Google Patents

Abstract

PURPOSE:To prevent burn-out at bearing portions due to uneven contact of bearing metals disposed at the top of a crank shaft, by locating the upper end faces of two bearing metals on the same plane, and making the points where the reaction forces of the load applied to the two bearing metals are acted near to each other. CONSTITUTION:A bearing metal 36 is fitted in an eccentric hole 42 formed in a crank shaft 6 where a shaft 55 of an oscillating scroll 2 is fitted. The bearing metal 36 is disposed such that its upper end face is located on the same plate as the upper end face of a bearing metal 37 and a large-diameter shaft portion of the crank shaft 6. Further, the bearing metal 36 is formed with an oil groove for feeding lubricating oil, and the oil groove is formed at the portion of the bearing metal 36 located on the opposite side of the portion where load is applied. The large-diameter shaft portion of the crank shaft 6 is fitted at the portion of the bearing metal 37 of a bearing support 7 and a stepped portion of the crank shaft 6 is supported by a thrust support 38 of the bearing support 7. Therefore, it is enabled to prevent occurrence of burn-out at the bearing portions.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bearing device for a scroll compressor.

The purpose of this invention is to construct a bearing device for the connection between the crankshaft of a scroll compressor and the oscillating scroll shaft of an oscillating scroll, and to achieve stable bearing performance over a long period of time. The present invention aims to provide a scroll compressor.

Before entering into the description of this invention, the principle of a scroll compressor will be described.

The basic elements of a scroll compressor are shown in Fig. 1 and 2 in Fig. 1, (1) is a kindergarten scroll, (2) is an oscillating scroll, (3) is a discharge port, and (4) is a In the compression chamber, 0 is a fixed point on the fixed scroll, and 0 is a fixed point on the oscillating scroll. Fixed scroll (1) and swinging scroll (
2ゝ is composed of spirals of the same shape, and its shape is
As conventionally known, involute or 1
It is a combination of circular arcs, etc.

Next, the operation will be explained. In Figure 1, the fixed scroll (1) is stationary with respect to space, and the swinging scroll (2) is combined with the fixed scroll (1) as shown in the figure, and its attitude does not change over the space. Then, perform a rotational movement, that is, a rocking motion, and perform a rotational movement, that is, a swinging motion,
, 2700. As the oscillating scroll (2) swings, the crescent-shaped compression chamber (4) formed between the fixed scroll (1) and the oscillating scroll (2) sequentially reduces its volume and becomes a compression chamber ( The gas taken in 9) is compressed and discharged from the discharge port (3).

During this time, the distance from O to 0 in FIG. 1 is held constant, and if the interval between the spirals is expressed by a and the thickness by t, then 00=--1. a corresponds to the pitch of the spiral.

The outline of the device known as a scroll compressor is as above.

Next, the construction and operation of a specific embodiment of a single-scroll compressor, including the present invention, will be explained in detail.

Figure 2 shows a specific example of a scroll compressor used in refrigeration or air conditioning, in which it is configured as a compressor for a gas such as fluorocarbon, and has a so-called semi-closed configuration. It is something that you have.

In the figure, (1) is a fixed scroll, (2) is an oscillating scroll, (3) is a discharge port, (4) is a compression chamber, the value Q is an oscillating souffler shaft, (6) is a crankshaft, and (7) is a is the bearing support, (8) is the motor rotor, (9) is the motor stator,
Qlm is the first balance, (1υ is the second balance, (6)
Q41 is the key, (G) is the washer, αQ is the anti-recovery washer, Q? ) is the rotor fixing nut, (g) is the stator, 9) is the bolt, ni) is the discharge chamber, (2) is the bolt, ni) is the 0 ring, (c) is the shell, - is the stator fixing bolt, - is the washer, 弼 is the support ring, ⑼ is the bottom plate, (c) is the suction screw hole, 4~
(The figure shows a blind screw hole, an oil-filled fitting, and an Oldham joint shown in the figure.
- is a thrust bearing, - is a bearing metal, 0 or 0 is a bearing metal, (c) is a thrust bearing, country is a bearing metal, 鴩 is a hermetic terminal, @1) is a hermetic terminal, and i1 is a crankshaft eccentric hole.

The above are the main components, Figure 8 is Otori-11 in Figure 2.
This is a line sectional view. In the figure, (6) is the crankshaft, (7)
is the bearing support, - is the Oldham joint, (to) is the thrust bearing, 1 is the bearing metal, 0 is the bearing metal, ← 4 is the crankshaft eccentric hole, (43 is the Oldham guide groove, 2) is the suction port,
The decoy is an O-ring groove, the decoy is a through hole for the bolt, and the i4 force is a female thread.

Furthermore, FIG. 41 is a sectional view taken along the line mV-N in FIG. The decoy is the through hole for the bolt, and the female thread 5i481 is the communication part.

The configuration of each component of the scroll compressor configured as described above will be explained in detail.

FIG. 5 is a perspective view showing a fixed scroll, and in the figure, (1) is a fixed scroll, (8) is a discharge port, 4 is a fixed scroll tooth, - is a fixed scroll base plate 1iIl is a through hole for a bolt, The fight is a fixed scroll stopper bolt sitting 9
It is. The fixed scroll has a shape in which spiral grooves are provided on a disk of uniform thickness, and as a result of providing the grooves, the uniformity of the fixed scroll is formed. The part where the grooves were not removed becomes the fixed scroll base plate.

A discharge port (3) is provided in the central portion of the fixed scroll base plate, and a thread is cut on the inner surface of the discharge port (3) to enable connection as required.

12 fixed scroll retaining bolt seats 9 are provided to prevent the head of the bolt from sinking into the seats when the discharge chamber (E) shown in FIG. 2 is installed.

FIG. 6 is a perspective view showing an oscillating scroll. In the figure, (2) indicates an oscillating scroll;
- is an oscillating scroll base plate, φth is an oscillating scroll shaft, the 0 oscillating scroll teeth shown are Oldham's pawls, which are molded integrally with the oscillating scroll base plate circle, and Oldham's pawl - The oscillating scroll axis value 4 is also integrally molded.

FIG. 7 is a perspective view of the oscillating scroll seen from the back, in which (2) is the oscillating scroll, βS middle oscillating scroll teeth, the figure is the oscillating scroll base plate, and G koji is the oscillating scroll. The movable scroll shaft, - is an Oldham pawl, φη is an oscillating scroll balancer, and the link is a balancer fixing bolt. The center of the oscillating scroll shaft and the center of the oscillating scroll base plate are formed to coincide with each other. The Oldham pawl fits into the Oldham joint shown in Figures 2 and 8, and is used to regulate the positional relationship between the swinging scroll (2) and the fixed scroll (3). This is a necessary part to realize the swinging motion of the scroll (2). Oldham's pawls are arranged on a straight line passing through the center. Drill the oscillating scroll shaft, fit it into the crankshaft eccentric hole (4'4) of the crankshaft (6) shown in Fig. 2, and insert the motor rotor (
8) to the crankshaft (6) to realize eccentric rocking motion of the rocking scroll (2). The oscillating scroll parancer conflict η is caused by static imbalance caused by the center of gravity of the oscillating scroll tooth of the oscillating scroll (2) not being aligned with the center of the oscillating scroll base plate and the oscillating scroll shaft. This is provided to correct the balance, so that the center of gravity of the entire swinging scroll (2) coincides with the center of one swinging scroll axis H.

The balancer fixing bolt fixes the swinging scroll balancer to the swinging scroll base plate.

FIG. 8 is a perspective view showing the bearing, and in the figure (7
) stands for bearing support, 0υ stands for blind screw hole, line stands for oil filling, (to)
is a thrust bearing, 俤η is a bearing metal, - is a thrust bearing,
(b) is the Oldham guide groove 1, the ladder is the suction port, (44 is 0
The ring groove is a through hole for bolts, and ←II is a female thread.

The crankshaft (6) shown in FIG. 2 fits into the bearing metal 0η portion of the bearing support (7), and the crankshaft (6)
) will now rest on the thrust receiver. The thrust bearing (toward) part is made by an oscillating scroll base plate (foundation).
It has the function of supporting the back of the oscillating scroll (2
) is responsible for the thrust applied from the Oldham guide groove α
The rising part is the part where the Oldham joint shown in Figure 2 fits, and is the part where the Oldham joint makes linear reciprocating motion.
In this embodiment, four suction ports 144J are provided, each passing through the bearing support (7). The end face of the bearing support (7) is provided with four O-rings #I for sealing, a female thread 1471 for fixing the bearing support (7) and the fixed scroll (1), and a bolt for fixing the whole thing. A through hole is provided.

Oil inlet for oil supply and blind screw hole 6υ connected to it
is used, for example, to measure supply oil pressure. The end face where the through hole for the bolt and the female thread 11η are provided and the thrust bearing face are the same as the thickness of the oscillating scroll base plate plus about 10 μm to 60 μm. When the fixed scroll (1) is fixed to the end face, the swinging scroll (2) can swing.

This state is clearly understood in FIG.

FIG. 9 is a perspective view showing the Oldham joint, and in the figure, (Incorporated) is the Oldham joint, - is the bearing fitting pawl, and Iq is the oscillating scroll fitting guide f#5lll is the same item.

As shown in Figure 1, the Oldham joint is used to maintain the relative positional relationship between the fixed scroll (1) and the oscillating scroll (2), and is used to maintain the relative positional relationship between the fixed scroll (1) and the oscillating scroll (2). Specified together with axis (6).

The bearing fitting pawl fits into the Oldham's guide groove of the bearing (7), and the swinging scroll fitting guide groove fits with the Oldham's pawl of the swinging scroll (2).

The circular tomb Ill is constructed so that the bearing fitting pawl and the swinging scroll fitting guide groove are perpendicular to each other with respect to its center.

1 Oscillating scroll (2) depending on the rotation of the crankshaft (6)
When the bearing (7) performs an eccentric movement, the bearing fitting pawl ring of the Oldham coupling fits into the Oldham guide groove 04 of the bearing (7), and
The entire Oldham Joint (Incorporated) performs reciprocating linear motion in the direction of the Oldham guide groove. 2) performs reciprocating linear motion relative to the Oldham joint. As a result, the oscillating scroll (2) realizes an eccentric oscillating motion as a combination of two orthogonal reciprocating linear motions.
The structure and operation of

Figure 1θ is a perspective view showing the crankshaft, and in the figure, (6) is a bird's-eye view of the crankshaft, oil filler 1- is the bearing metal, ←bottle is the crankshaft eccentric hole, @21, and M is the oil groove. ,−
1- is the keyway, - is the crankshaft large diameter shaft part, @η is the rotor mounting part, and 2 is the crankshaft small diameter shaft part which is smaller in diameter than the crankshaft large diameter part 41]. The shaft portion constitutes a shift rank 1llllll (6), and a stepped portion is formed between the crankshaft large-diameter shaft portion (1) and the crankshaft small-diameter shaft portion (2). The shaft fitting part S4 is a screw for a stator fixing nut, and the button is a groove for a reversible washer.

The crankshaft (6) receives the driving force of the electric motor rotor (8) attached to the rotor attachment portion η, and applies rotational force to the oscillating scroll (2) fitted in the crankshaft eccentric hole (■). A metal bearing is provided in the crankshaft eccentric hole 11 into which the oscillating scroll shaft is fitted.

The bearing metal (6) is arranged so that its upper end surface is located on the same plane as the upper end surface of the bearing metal (6) and the large diameter shaft part (2) of the crankshaft (6). ing.

Further, this bearing metal may be a normal bearing base metal or a so-called needle roller bearing.

The bearing metal is provided with oil for lubricating, and this is normally turned off on the anti-load side. The large diameter shaft part of the crankshaft (■) fits into the η part of the bearing metal of the bearing support (7), and the stepped part of the crankshaft (6) fits into the bearing metal part of the bearing support (7).
) is supported by the thrust receiver (c). The large-diameter crankshaft shaft S- is also provided with an oil groove 4, which constitutes an oil supply path. In addition, there are two oil holes connected to the oil groove 9H in the figure, one of which is connected to the crankshaft (
6) so that oil can be supplied to the shaft fitting portion by penetrating the central shaft. The keyway is for fixing the first balance shown in FIG. 2, and the keyway is a part where the electric motor rotor (8) is attached. The shaft fitting part is
This is a portion that fits into the bearing metal 71 of the bottom plate shown in FIG. 2, and restrains and supports the radial movement of the crankshaft (6). The stator locking nut screw has a second
The rotor locking nut (17) shown in the figure is installed,
The claw portion of the locking washer αQ of the rotor locking nut Oη is inserted into the locking washer groove.

FIG. 11 is a perspective view showing the first balance, and in the figure, (11 is the first balance, σ0 is the balance weight, Q is the cylindrical part, C is the fixed part, and Koji is the keyway.

As can be understood from Fig. 2, the first balance O, together with the second balance (B), performs balancing against the centrifugal force derived from the eccentric rocking motion of the rocking scroll (2). This guarantees quiet operation with one complete revolution. The first balance way is fixed to the key groove of the crankshaft (6) by a key (2) inserted into the key groove tI41 provided in the fixing part (c).

In order to downsize the whole compressor, the balance way till is installed through the cylindrical part v2 so as to be located in the entire space formed between the bearing support (7) and the electric motor stator (9). There is. In addition, by making the balance weight (711) as close as possible to the oscillating scroll (2) in the axial direction and as far away from the center of the crankshaft (6) as possible in the radial direction, the mass of the balance weight σ0 can be reduced. If the oscillating scroll (2) is made entirely of commonly used cast iron or spheroidal graphite cast iron,
Its mass can be ignored, and the mass of the balance weight +1 also increases, so the above measures are taken to prevent the compressor as a whole from becoming too large in the axial direction.

The first balance (711) is installed by making good use of the space created between the first bearing support (7) and the electric motor stator (9), contributing to the miniaturization of the entire system.

FIG. 12 is a perspective view showing the electric motor rotor, and in the electric diagram, (3) is the electric motor rotor, αη is the second balance,
4 is an end ring, and σe is a keyway. The electric motor rotor (8) is fixed in the keyway of the crankshaft (6) with a key α-fatty that fits into the keyway 4, and provides rotational force to the crankshaft (6). A second balance Qη opposed to the oscillating scroll (2) is provided at one end of the end ring 4, and together with the first balance OQ, this reduces the vibration of the whole.

FIG. 18 is a perspective view of the electric motor rotor (8) in FIG. 12 seen from the opposite side.
is the second balance, (g) is star 2, α field is volt, f
ff9 is the end ring, σQ is the keyway, (7η is the stator location screw hole. The second balance aυ is the bolt L19
1, it is fixed to the end ring vI19.

In addition, the stator fixing screw hole ff71 (on the stirrer) is provided in the end ring tIυ and the second balance 0υ.
Fixed.

The above-mentioned parts are assembled as shown in the assembly diagram of FIG. 14.

In Fig. 14, first, the crankshaft (6) is attached to the bearing support (
7), and then attach the Oldham joint to the bearing support (
7). Insert the oscillating scroll (2) into the crankshaft (6) from above of the Oldham joint, and fix the fixed scroll (1) from above to the bearing support (7) with the bolt (tta). ), install the first balance 00 from the bottom of the motor rotor (8), move the spacer (to) to determine the axial position of the motor rotor (8), and remove the washer (t) from the bottom of the motor rotor (8). Insert the locking washer 01, and fix the first balance aO1 (spacer 01 to the motor rotor) together with the rotor locking nut αη to the crankshaft (6). As can be seen from FIG. 2, the first balance 00 acts as a stopper against the stepped portion of the crankshaft (6). A second balance α and a star 2 (2) are attached to the electric motor rotor (8).

FIG. 15 is an assembly diagram showing the procedure for assembling the entire interior of the compressor assembled in FIG. 14.

The discharge chamber (1) is fixed to the upper surface of the assembled fixed scroll (1) by a bolt 9). The discharge chamber (e) is fitted with an O-ring (as shown in FIG. 2) for sealing. The bolt (79) passes through the fixed scroll (1) and is screwed into a female thread provided on the upper surface of the shell grating to achieve fixation.

An electric motor stator (9) is fixed to the shell (c) by a stator fixing port shown in FIG. An O-ring (2) is installed in the O-ring groove υ on the upper end surface of the shell (2) for sealing. The symbol shown in FIG. 15 is the coil end of the motor stator (9). As can be seen from Fig. 2, a spigot is provided on the back side of the bearing (7) and is inserted into the shell.

This is to accurately create an air gap that is concentrically formed between the motor rotor (8) and the motor stator (9).

Hermetic terminal 1 (1, f
For example, the two-pin hermetic terminal part is for the winding protection circuit of the motor stator (9), and the eight-pin hermetic terminal part 61 is welded to the terminal part 4J).
I is for supplying 8-phase alternating current to the motor stator (9), and serves to insulate the shell (to the shell) and seal it from the outside air.

Figure 16 is an assembly diagram showing how the bottom plate (goods) is finally fixed to the shell) assembled as described above. , fits into the shaft fitting part 1@ of the crankshaft (6).In order to realize this concentricity, a spigot part @η is provided).

Also, an O-ring ( ) is fitted into the O-ring groove q for sealing. It is fixed to the shell (E) by the female thread of the gel flange of this bottom plate (E) and bolts 189). Bottom plate (2η has a screw hole for suction)
is provided.

As described above, the assembly is completed in the state shown in Fig. 2.

The operation of the scroll compressor as a whole shown in FIG. 2 will be briefly explained.

Through the hermetic terminal section, the motor stake (9)
When, for example, 8-phase alternating current is supplied to the motor, the motor rotor (8) generates torque and rotates together with the crankshaft (6). When the crankshaft (6) starts rotating, rotational force is transmitted to the swinging scroll shaft φ4 that fits into the crankshaft eccentric hole 14'4, and the swinging scroll (2) is attached to the bearing support (7). It is guided by the Oldham joint to achieve eccentric rocking motion. Then, a compression action as shown in FIG. 1 is performed, and the compressed gas is discharged from the discharge port (3). Gases such as chlorofluorocarbons are inhaled through the suction screw hole (c) of the bottom plate η, and the air gap between the motor rotor (8) and the motor stator (9) and the motor stator (
9) and the shell), from the suction port H (span in Fig. 8) provided in the bearing support (7), through the continuous passage (c) to the oscillating scroll (2) and the fixed scroll (1). ) into the compression chamber (4).

This is the general outline of the operation.In the oil supply system, for example, if the discharge chamber (E) has a built-in oil separator (not shown), the oil separated in the discharge chamber (E) is provided in the fixed scroll (1). Add oil.

The bearing metal η is reached through the oil pipe provided on the bearing support (7). Furthermore, each part of the thrust bearing, bearing metal, and thrust bearing is also supplied with oil through the oil hole 9 and the oil groove 1 shown in FIG. The oil that has passed through the thrust bearing is taken into the compression chamber together with the inhaled gas. The oil that has passed through the thrust bearing 9 bearing metal 4 flows out into the shell, is atomized by the flow rate of the suction gas h, and the action of the star 2 (g), and is combined with the suction gas 1 into the compression chamber. into)

The oil that has entered the compression chamber (4) together with the suction scum fills the radial and axial gaps between the fixed scroll teeth 1491 (see Figure 6) and the oscillating scroll teeth -0. Works to minimize leakage.

The oil flowing out from the thrust bearing taS also lubricates each sliding surface of the Oldham joint. The oil that has flowed into the discharge chamber (e) again in this manner is separated by an oil separator (not shown) and is pumped to the oil supply line by the pressure of the discharged gas. During this time, if the oil is not separated by the oil separator, it will circulate through the refrigeration cycle and return to the suction screw hole □□□ together with the suction gas, if the apparatus is used as a refrigerator, for example. Further, the oil separator may not be located within the discharge chamber (E) but may be provided as a separate body outside.

The motor protection device connected by the hermetic terminal detects an overload on the motor stator (9) or a temperature rise during abnormal operation, and protects the motor stator (9).
For example, protection is provided by cutting off the three-phase AC power supply that is being supplied to the equipment.

Now, the construction and operation of the thrust bearing of the first embodiment will be explained in more detail.

In Fig. 2, the oscillating scroll (2) and the bearing support (7) are shown.
) The oil flowing into the contact part P of the thrust bearing is fed under pressure from the leprosy oil separator shown in the figure at the flu/s pressure fζ, and the pressure loss in the oil path is adjusted to an appropriate value by design. and has a specified pressure.

The integrated force of this pressure over the thrust bearing opposes the thrust force of the pressure derived by the oscillating scroll (2) at the compression N (4).

If the integrated pressure of the oil pressure is smaller than or equal to the thrust force, then the face plate S, which may have a gap in the axial direction in Fig. 2, should be operated with a gap of about 1° to 50 μm, which is the value set at the time of design. That will happen.

Also, the end face of the fixed scroll (1) and the oscillating scroll (2)
A similar gap is also formed on the opposing surface Q of the upper end surface of the swinging scroll base plate (-).

When operating in this state, the axial sealing of the plane It,8 will be obtained by the oil introduced into the compression chamber (4). In this case, most of the thrust force is received by the thrust bearing.

According to experiments, the sealing effect of oil ensures a flow rate that can withstand practical use. In this state, wear of the thrust bearing with insufficient lubrication during startup or shutdown poses a problem in maintaining the axial clearance, but this problem can be solved by material selection.

In addition, if the design is such that the integrated value of the oil pressure is greater than the thrust force, the swinging scroll (2) will be pushed upward and will slide at h6, s6, or Q in Figure 2. I will do it.

■If it slides, the end face of the oscillating scroll tooth 4 (see Fig. 6) of the 1 oscillating scroll (2) and the opposing scroll base plate F4 of the fixed scroll (2) (see Fig. 5) reference)
The bottom surface on the side of the compression chamber slides, and even in this case, operation is possible because a sufficient pressure-receiving area of the tip surface of the oscillating scroll can be secured. The inner sliding surfaces are lubricated by oil taken into the compression chamber (4).

In the case of sliding on 8 surfaces, the tip surface of the fixed scroll tooth (49) of the fixed scroll (1) and the top surface of the swing scroll base plate (goods) of the swing scroll (2) will slide.
As in the case described above, both operation and lubrication are possible.

If the dimensions of the periphery of the first side of the oscillating scroll base plate of the oscillating scroll (2) are made slightly thicker so that the oscillating scroll (2) slides with the second curve of This causes a clearance, and instead of the thrust bearing (to), the outer periphery of the end face of the fixed scroll (1) slides with the periphery of the upper surface of the oscillating scroll base plate.
Seals are also possible.

When the thrust force is directed in this way, the section P is operated with the clearance maintained at a certain value. Even if the direction of the total thrust force changes, the a1 rotation is still possible.

In addition, in this invention, the radial direction molecule in FIG. 2 is -,
It has a constant clearance of 10 to 50 μm and is sealed with oil.

As described above, the present invention provides a fixed scroll and an oscillating scroll that combine fixed scroll teeth and oscillating scroll teeth configured in a spiral shape to form a compression base between the two scrolls m, and the oscillating scroll. a crankshaft having an eccentric hole at its tip for supporting an oscillating scroll shaft and imparting rotational force to the oscillating scroll; It is characterized by comprising a bearing metal that supports the surface and another bearing metal that supports the outer circumferential surface of the tip of the crankshaft, and both of the bearing metals are arranged so that their upper end surfaces are located on the same plane. That is. In a device in which the oscillating scroll shaft of the oscillating scroll is supported in the eccentric hole of the crankshaft, for example, the bearing metal at the tip of the crankshaft is located below the upper end surface of the bearing metal of the oscillating scroll shaft. If the load reaction force acting on both bearing metals is located at However, in this invention, since the upper end surfaces of both bearing metals are located on the same plane, the points of action of the load reaction force acting on both bearing metals can be approximated. , the above problems are solved, and a scroll compressor with good bearing performance can be obtained. Driving performance can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a diagram of the operating principle of a scroll compressor, FIG. 2 is a sectional view showing an embodiment of the scroll compressor of the present invention, and FIG.
The figure is a cross-sectional view of the Zen line in Figure 2, and Figure 4 is the PI line in Figure 2.
A sectional view taken along the line IV, FIG. 6 is a perspective view showing the fixed scroll,
Fig. 6 is a perspective view showing the swinging scroll, Fig. 7 is a perspective view showing the swinging scroll, Fig. 8 is a perspective view showing the bearing, Fig. 9 is a perspective view showing the Oldham joint, and Fig. 10 is the crank. FIG. 11 is a perspective view showing the first balance; FIGS. 12 and 18 are perspective views showing the motor rotor; FIG. 14 is an assembled view of the compressor; It is an assembly diagram of the entire compressor including the shell. In the figure, (1) is a fixed scroll, (2) is an oscillating scroll, (4) is a pressure chamber, (6) is a crankshaft, -1
@η is the bearing metal. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent Masuo Oiwa 1st group. deθ. z7o' ↑ lθg Fig. 3 Fig. 4 C'' Fig. 5 l Fig. 614 Fig. 7 Fig. 8 Fig. 9 Fig. 10 Fig. 11 Fig. 12 j Fig. 1; 7

Claims (1)

[Claims] A fixed scroll and an oscillating scroll that combine fixed scroll teeth and oscillating scroll teeth configured in a spiral shape to form a compression chamber between the two scroll teeth, and an oscillating scroll shaft of the oscillating scroll. a crankshaft having an eccentric hole at its tip for supporting the oscillating scroll and applying rotational force to the oscillating scroll; A scroll comprising a bearing metal and another bearing metal supporting the outer circumferential surface of the tip of the crankshaft, and arranged so that the two bearing metals are separated and their upper end surfaces are located on the same plane. compressor.