JPH048648B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an Orda joint suitable as an automatic prevention means for a swinging scroll of a scroll compressor.

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

The basic elements of a scroll compressor are shown in Figure 1. In Figure 1, 1 is a fixed scroll, 2 is an oscillating scroll, 3 is a discharge port, 4 is a compression chamber, and O is a fixed point on the fixed scroll. , O' is a fixed point on the oscillating scroll. The fixed scroll 1 and the oscillating scroll 2 are composed of spirals having the same shape, and the shape thereof is as conventionally known.
It is a combination of involutes or circular arcs.

Next, the operation will be explained. In Figure 1,
The fixed scroll 1 is stationary in space,
The swinging scroll 2 is combined with the fixed scroll 1 as shown in the figure, and performs rotational movement, that is, swinging, without changing its attitude with respect to space.
Move like 0°, 90°, 180°, 270°. As the oscillating scroll 2 swings, the crescent-shaped compression chamber 4 formed between the fixed scroll 1 and the oscillating scroll 2 gradually reduces its volume, and the gas taken into the compression chamber 4 is compressed. and is discharged from the discharge port 3. During this time, the distance from O to O' in FIG. 1 is kept constant, and if the interval between the spirals is expressed by a and the thickness is expressed by t, then OO'=a/2-t. 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 the 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, which is configured as a compressor for a gas such as chlorofluorocarbons, and has a so-called semi-hermetic configuration. It has the following.

In the figure, 1 is a fixed scroll, 2 is an oscillating scroll, 3 is a discharge port, 4 is a compression chamber, 5, 5 is an oscillating scroll shaft, 6 is a crankshaft, 7 is a bearing support, 8 is an electric motor rotor, and 9 is Electric motor stator, 1
0 is the first balance, 11 is the second balance, 12 is the key, 13 is the spacer, 14 is the key, 15 is the washer, 16 is the detent washer, 17 is the rotor fixing nut, 18 is the stirrer, 19 is the bolt, 20
is the discharge chamber, 21 is the bolt, 22 is the O-ring, 23 is the shell, 24 is the start bolt,
25 is a washer, 26 is a support ring, 27 is a bottom plate, 28 is a suction screw hole, 29 to 32 are blind screw holes, 33 is an oil hole, 34 is an Oldham joint, 35 is a thrust bearing, 36 is a bearing metal, 37 is a bearing Metal, 38 is thrust bearing, 39 is bearing metal,
40 is a hermetic terminal, 41 is a hermetic terminal, and 42 is a crankshaft eccentric hole.

The above are the main components, and Figure 3 is a cross-sectional view of Figure 2. In the figure, 6 is the crankshaft, 7 is the bearing support, 34 is the Oldham joint,
35 is a thrust bearing, 36 is a bearing metal, 37 is a bearing metal, 42 is a crankshaft eccentric hole, 43 is an Oldham guide groove, 44 is an intake port, 45 is an O-ring groove, 46 is a through hole for a bolt, 47 is a female thread. be.

Furthermore, when viewed from the - cross section in Figure 2,
In FIG. 4, 1 is a fixed scroll, 2 is an oscillating scroll, 3 is a discharge port, 4 is a compression chamber, 46 is a through hole for a bolt, 47 is a female thread, 4
8 is a communication portion. In this scroll compressor, the bearing support 7 is a stationary member, and the swinging scroll 2 is a rotating member.

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

FIG. 5 shows a fixed scroll, and in the figure, 1 is a fixed scroll, 3 is a discharge port, 49 is a fixed scroll tooth, 50 is a fixed scroll base, and 51
5 is a through hole for a bolt, and 52 is a counterbore for a fixed scroll retaining bolt. A fixed scroll is shaped like a disk with a uniform thickness and a spiral groove.
Fixed scroll teeth 49 are formed as a result of providing the grooves. The portion where the groove has not been cut becomes the fixed scroll base plate 50.

A discharge port 3 is provided in the central portion of the fixed scroll base plate 50, and a thread is cut on the inner surface of the discharge port 3 to enable connection as required. The fixed scroll retaining bolt counterbore 52 is the second
This is to prevent the head of the bolt from sinking into the counterbore and being hit when the discharge chamber 20 shown in the figure is installed.

FIG. 6 shows an oscillating scroll, and in the figure, 2 is an oscillating scroll, 53 is an oscillating scroll tooth, 54 is an oscillating scroll base plate, 55 is an oscillating scroll shaft, and 56 is an Oldham pawl. .

The oscillating scroll teeth 53 are connected to the oscillating scroll base plate 5.
4, and furthermore, the Oldham pawl 56 and the swinging scroll shaft 55 are also integrally molded.

Figure 7 shows the swinging scroll seen from the back, and in the figure, 2 is the swinging scroll, 5 is the swinging scroll.
3 is an oscillating scroll tooth, 54 is an oscillating scroll base plate, 55 is an oscillating scroll shaft, 56 is an Oldham pawl, 57 is an oscillating scroll balancer, and 58 is a balancer fixing bolt. Oscillating scroll shaft 55
The center of the oscillating scroll base plate is formed to coincide with the center of the oscillating scroll base plate. The Oldham pawl 56 fits into the Oldham joint 34 shown in FIGS. 2 and 3, and regulates the positional relationship between the swinging scroll 2 and the fixed scroll 3. Oldham's pawls 56, which are a necessary part for realizing dynamic motion, are arranged on a straight line passing through the center. The swinging scroll shaft 55 has a second
Crankshaft eccentric hole 4 of crankshaft 6 shown in the figure
2 and connects the motor rotor 8 to the crankshaft 6.
The oscillating scroll 2 receives the rotational force transmitted to the
This is the part for realizing eccentric rocking motion. The swinging scroll balancer 57 is connected to the swinging scroll 2
This is provided to correct the static imbalance caused by the center of gravity of the swinging scroll teeth 53 not coinciding with the centers of the swinging scroll base plate 54 and the swinging scroll shaft 55. The center of gravity of the entire swinging scroll 2 is arranged to coincide with the center of the swinging scroll shaft 55.
The balancer fixing bolt 58 fixes the swinging scroll balancer to the swinging scroll base plate 54.

Figure 8 shows a bearing support.
is a bearing support, 31 is a blind screw hole, 33 is an oil hole,
35 is a thrust bearing, 37 is a bearing metal, 38 is a thrust bearing, 43 is an Oldham guide groove, 44 is a suction port, 45 is an O-ring groove, 46 is a through hole for a bolt, and 47 is a female thread.

The bearing metal 37 portion of the bearing support 7 has a second
The crankshaft 6 shown in the figure is fitted so that the stepped portion of the crankshaft 6 rests on the thrust bearing 38.

The thrust bearing 35 has a function of supporting the back surface of the swinging scroll base plate 54 and receives the thrust applied from the swinging scroll 2. In some cases, the thrust bearing 35 may have a function of introducing hydraulic pressure or the like to the surface of the thrust bearing 35 to provide a supporting force corresponding to the thrust applied from the oscillating scroll 2 or a force greater than the thrust. The Oldham guide groove 43 is a portion into which the Oldham joint 34 shown in FIG. 2 is fitted, and is a portion through which the Oldham joint 34 performs linear reciprocating motion. In this embodiment, four suction ports 44 are provided, and they penetrate through the bearing support 7. The end face of the bearing support 7 is provided with an O-ring groove 45 for sealing, a female thread 47 for fixing the bearing support 7 and the fixed scroll 1, and a through hole for a bolt for fixing the whole. . An oil hole 33 for oil supply and a blind screw hole 31 communicating therewith are also provided. The blind screw hole 31 is used, for example, when measuring the supply oil pressure. The end face where the bolt through hole 46 and the female thread 47 are provided and the face of the thrust bearing 35 are 10 μm thicker than the face of the thrust bearing 35 due to the thickness of the rocking scroll base plate 54.
It is sunk by about 50 μm, so that when the fixed scroll 1 is fixed to the end face, the swinging scroll 2 can swing. This situation is better understood in FIG.

FIG. 9 shows an Oldham joint, and in the figure,
34 is an Oldham joint, 59 is a bearing fitting pawl, that is, a first guide, 60 is an oscillating scroll fitting guide groove, that is, a second guide, and 6
1 is a ring.

The Oldham joint 34, as shown in FIG.
This is to maintain the relative positional relationship between the fixed scroll 1 and the swinging scroll 2.
together with the crankshaft 6.

The bearing fitting pawl 59 fits into the Oldham guide groove 43 of the bearing support 7, and the swinging scroll fitting guide groove 60 fits into the Oldham's pawl 5 of the swinging scroll 2.
6 is fitted. The ring 61 is configured so that the bearing fitting pawl 59 and the swinging scroll fitting guide groove 60 are perpendicular to each other with respect to its center.

Due to the rotation of the crankshaft 6, the oscillating scroll 2
When the Oldham joint 34 performs an eccentric movement, the bearing fitting pawl 59 of the Oldham joint 34 fits into the Oldham guide groove 43 of the bearing support 7, and the entire Oldham joint 34 moves in the direction of the Oldham guide groove, that is, in the first annular ring. Performs reciprocating linear motion in the radial direction. Furthermore, in that state,
The rocking scroll 2 fitted into the Oldham joint 34 via the rocking scroll fitting guide groove 60 moves in a reciprocating linear motion relative to the Oldham joint 34, that is, reciprocating in the radial direction of the second annular portion. Do exercise. As a result, the oscillating scroll 2 realizes an eccentric oscillating motion as a combination of two orthogonal reciprocating linear motions. The above is the configuration and operation of the Oldham joint 34.

FIG. 10 shows a crankshaft, and in the figure, 6 is a crankshaft, 33 is an oil hole, 36 is a bearing metal, 42 is a crankshaft eccentric hole, 62, 63 are oil grooves, 64, 65 are key grooves, 66 is the shaft fitting part, 67
68 is a rotor mounting portion, 68 is a shaft fitting portion, 69 is a screw for a stator locking nut, and 70 is a groove for a locking washer.

The crankshaft 6 receives the driving force of the electric motor rotor 8 attached to the rotor attachment part 67 and applies rotational force to the oscillating scroll 2 fitted in the crankshaft eccentric hole 42. A bearing metal 36 is provided in the crankshaft eccentric hole 42 into which the bearing 55 fits. bearing metal 36
may be a normal bearing alloy, or may be a needle roller bearing, a so-called needle bearing. The bearing metal 36 is provided with an oil groove 63 for oil supply, and this groove is normally cut on the opposite load side. The shaft fitting part 66 fits into the bearing metal 37 part of the bearing support 7, and the stepped part of the crankshaft 6 fits into the bearing metal 37 part of the bearing support 7.
It is supported by a thrust bearing 38. Shaft fitting part 66
Also, an oil groove 62 is provided therein, forming an oil supply path. Furthermore, two oil holes 33 are provided in the figure, connected to the oil grooves 62 and 63, one of which penetrates the central axis of the crankshaft 6 so that oil can be supplied to the shaft fitting portion 68. It's getting old. The keyway 64 is for fixing the first balance shown in FIG. 2, and the keyway 65 is a part to which the motor rotor 8 is attached. The shaft fitting portion 68 is a portion that fits into the bearing metal 37 of the bottom plate 27 shown in FIG. 2, and restrains and supports movement of the crankshaft 6 in the radial direction. The rotor retaining nut 17 shown in FIG. 2 is attached to the stator retaining nut screw 69, and the rotor retaining nut 17 shown in FIG.
0, the claw portion of the locking washer 16 of the rotor locking nut 17 is inserted.

FIG. 11 shows a first balance, and in the figure, 10 is the first balance, 71 is a balance weight, 72 is a cylindrical portion, and 74 is a keyway.

As can be understood from Fig. 2, the first balance 10, together with the second balance 11, performs balancing against the centrifugal force derived from the eccentric rocking motion of the rocking scroll 2, and maintains the quietness of the entire rotating system. This guarantees driving. The first balance 10 is fixed to the keyway 64 of the crankshaft 6 by the key 12 inserted into the keyway 74 provided in the fixing part 73. The balance weight 71 is installed via a cylindrical portion 72 so as to be located in a space formed between the bearing support 7 and the electric motor stator 9 in order to downsize the entire compressor. Furthermore, the mass of the balance weight 71 is reduced by making the balance weight 71 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. . If the oscillating scroll 2 is made of commonly used cast iron or spheroidal graphite cast iron, its mass cannot be ignored, and the mass of the balance weight 71 will also be large, so the measures described above should be taken. This prevents the entire compressor from becoming too large in the axial direction.

The first balance 71 is installed by making good use of the space created between the bearing support 7 and the electric motor stator 9, and contributes to downsizing the entire system.

FIG. 12 shows a motor rotor, and in the figure, 8 is the motor rotor, 11 is the second balance, and 7 is the motor rotor.
5 is an end ring, and 76 is a keyway. The electric motor rotor 8 is fixed in a keyway 65 of the crankshaft 6 with a key 14 that fits in a keyway 76, and provides rotational force to the crankshaft 6. end ring 7
At one end of 5, there is a second
A balance 11 is provided, a first balance 1
Together with 0, the overall vibration is reduced.

FIG. 13 is a reverse view of the motor rotor 8 in FIG. 12, and in the figure, 8 is the motor rotor;
11 is a second balance, 18 is a stirrer, 19 is a bolt, 75 is an end ring, 76 is a keyway, 77
is the stirrer fixing screw hole. 2nd balance 11
is fixed to the end ring 75 by a bolt 19. Also, the stirrer 18 is the end ring 7.
5 and the stirrer fixing screw hole 77 provided in the second balance 11.

The above-mentioned parts are assembled as shown in FIG. 14.

In FIG. 14, first, the crankshaft 6 is fitted into the bearing support 7, and then the Oldham joint 34 is fitted.
into the bearing support 7. Fit the oscillating scroll 2 onto the crankshaft 6 from above the Oldham joint 34, and then attach the fixed scroll 1 from above to the bolt 78.
It is fixed to the bearing 7 by. Attach the first balance 10 from the bottom of the crankshaft 6, and
3 to determine the axial position of the motor rotor 8, and remove the washer 15 from the bottom of the motor rotor 8.
A detent washer 16 is inserted, and the first balance 10, spacer 13, and motor rotor 8 are integrally fixed to the crankshaft 6 with a rotor retaining nut 17. As you can see from Figure 2, the first balance is 10.
corresponds to the stepped portion of the crankshaft 6 and serves as a stopper. The electric motor rotor 8 has a second
A balance 11 and a stirrer 18 are attached.

FIG. 15 shows means for assembling the entire interior of the compressor assembled in FIG. 14.

The discharge chamber 20 is fixed to the upper surface of the assembled fixed scroll 1 with bolts 79.
An O-ring 22 is attached to the discharge chamber 20 for sealing, as shown in FIG. The bolt 79 passes through the fixed scroll 1 and connects to the shell 2.
3 to achieve fixation. The electric motor stator 9 is fixed to the shell 23 by stator fixing bolts 24 shown in FIG. An O-ring 22 is attached to the upper end surface of the shell 23 in an O-ring groove 81 for sealing. Reference numeral 82 shown in FIG. 15 is a 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 fitted into the shell 23. This is to accurately create an air gap formed concentrically between the motor rotor 8 and the motor stator 9.

Hermetically sealed terminal 4 is located on the outer periphery of shell 23.
0 and 41 are welded together. For example, the two-pin hermetically sealed terminal 40 is for the winding protection circuit of the motor stator 9, and the three-pin hermetically sealed terminal 41 supplies three-phase alternating current to the motor stator 9. It serves as an insulator for the shell 23 and as a seal against the outside air.

Finally, the bottom plate 27 is assembled as described above.
FIG. 16 shows how the bearing metal 39 of the bearing support 88 of the bottom plate 27 fits into the shaft fitting part 68 of the crankshaft 6, and this concentricity is achieved. An inlet 87 is provided for this purpose. Also, O-ring groove 9 for sealing.
0 is fitted with an O-ring 22. This bottom plate 27 is fixed to the shell 23 by a female thread 85 of a shell flange 84 of the shell 23 and a bolt 89. A suction screw hole 28 is provided in the bottom plate 27.

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.

When, for example, three-phase alternating current is supplied to the motor stator 9 through the hermetic terminal 41, 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 55 that fits into the crankshaft eccentric hole 42, and the swinging scroll 2 is guided by the Oldham joint 34 attached to the bearing support 7. 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. The gas, such as fluorocarbon, flows into the suction screw hole 28 of the bottom plate 27, passes through the air cap between the motor rotor 8 and the motor stator 9, and the gap between the motor stator 9 and the shell 23, and then enters the suction provided in the bearing support 7. It is taken into the compression chamber 4 between the oscillating scroll 2 and the fixed scroll 1 through the opening 44 (see FIG. 3) and through the communication portion 48 . This is the outline of the operation. For example, if the discharge chamber 20 has a built-in oil separator (not shown), the oil separated in the discharge chamber 20 is transferred to the oil hole 33 provided in the fixed scroll 1. It reaches the bearing metal 37 through the oil hole 33 provided in the bearing support 7. Further, each part of the thrust bearing 35, bearing metal 39, and thrust bearing 38 is also supplied with oil through the oil hole 33 and oil grooves 62, 63 shown in FIG.
The oil that has passed through the thrust bearing 35 is taken into the compression chamber together with the inhaled gas. The oil that has passed through the thrust bearing 38 and the bearing metal 39 flows into the shell 23, is atomized by the flow rate of the suction gas and the action of the stirrer 18, and is taken into the compression chamber together with the suction gas. The oil taken into the compression chamber 4 together with the suction gas fills the radial and axial gaps between the fixed scroll teeth 49 (see Figure 5) and the oscillating scroll teeth 53 to minimize leakage. It has a suppressing effect. Thrust bearing 35
The oil that flows out also lubricates each sliding surface of the Oldham joint. The oil that has flowed into the discharge chamber 20 again in this manner is separated by an oil separator (not shown) and is forced into the oil supply line by the pressure of the discharged gas. During this time, the oil that is not separated by the oil separator will circulate through the refrigeration cycle and return to the suction screw hole 28 together with the suction gas when used as a refrigerator, for example. Furthermore, the oil separator need not be provided within the discharge chamber 20, but may be provided as a separate body outside.

The motor protection device connected by the hermetically sealed terminal 40 detects an overload of the motor stator 9 or a temperature rise during operation, etc.
Power is supplied to the electric motor stator 9. For example, protection is provided by cutting off the three-phase AC power supply.

As mentioned above, the stirrer 1 shown in FIG.
8 is an end ring 75 at the lower end of the motor rotor 8
The lubricating oil that tends to collect at the bottom of the shell 23 is agitated and scattered by the rotation of the electric motor rotor 8, which acts like a centrifugal fan. If the stirrer 18 were not provided, the proportion of lubricating oil remaining in the lower part of the shell would increase, which would not only have an adverse effect on the suction system, but also cause unfavorable conditions in the circulation of the lubricating oil.

The stirrer has a centrifugal fan shape with linear blades as shown in FIG. 18, and can be manufactured by simple sheet metal processing.

By providing the stirrer at the lower end of the motor rotor as described above, the lubricating oil can be stirred and scattered, and can be carried away together with the suction gas.

In such a scroll compressor, the Oldham joint 34 is lubricated by the oil flowing out from the thrust bearing 35 as described above.
The oil is supplied to the bearing fitting pawl 59 and the fitting guide groove 60 by the natural flow of oil supplied to the surface of the ring 61 in the vicinity of the bearing fitting pawl 59 and the fitting guide groove 60. Wear due to lack of
There were defects such as burn-in.

This invention has been made to eliminate such drawbacks.

Hereinafter, an explanation will be given with reference to FIG. 17 showing a front view of an Oldham joint as an example based on the present invention, and FIG. 18 showing a sectional view thereof.

In FIGS. 17 and 18, 34 is an Oldham joint, 61 is an annular portion, 61a is an annular sliding surface, and 5
9 is a bearing fitting pawl (first guide) formed on one surface of the annular portion 61, and 60 is an oscillating scroll fitting guide groove (first guide) formed on the other surface of the annular portion 61. 2), 100a and 100b are first and second oil grooves, respectively, and 101 is an oil hole. As shown in the figure, the first oil groove 100a extends along the circumference of the annular sliding surface 61a of the Oldham joint 34 from one bearing fitting pawl 59 to the other bearing fitting pawl 59.
There are half circles around each corner. Second oil groove 10
0b is the first oil groove 100a as shown in FIG.
It is provided so as to communicate with the outer periphery of the Oldham joint 34. Further, an oil hole 101 is provided so that the first oil groove 100a and the swinging scroll fitting guide groove 60 provided on the opposite side of the annular sliding surface 61a communicate with each other. A state in which the Oldham joint 34 is assembled is shown in FIGS. 19 and 20. FIG. 19 shows a cross-sectional view of the swinging scroll fitting guide groove 60 of the Oldham joint 34 fitted into the swinging scroll 2, and FIG. 20 shows a cross-sectional view of the structure shown in FIG. Oldham joint 3
4 shows a state in which the bearing fitting pawl 59 and the bearing support 7 are fitted together. From Fig. 19, 2 is an oscillating scroll (rotating member), 6 is a crankshaft, 7 is a bearing support (stationary member), 7a is a bottom surface of the bearing support, 34 is an Oldham joint, 35 is a thrust bearing, and 61a is an Oldham joint ring. In the sliding surface, 100a is a first oil groove provided in the Oldham joint 34, and 101 is an oil hole also provided in the Oldham joint 34.

Similarly, in FIG. 20, reference numeral 43 indicates an Oldham guide groove.

FIG. 21 is a cross section taken along line BB in FIG. 20. In the figure, 7 is a bearing support, 34 is an Oldham joint, 100a,
100b is a first oil groove and a second oil groove, and 101 is an oil hole. In the figure, the oil groove 100a and the fitting guide groove 60 are connected to each other, but the oil groove 100b and the fitting guide groove 60 are connected to each other. You may. That is, the second
The oil groove 100b may be formed in a direction starting from the oil hole 101 and opening in the radial direction of the first annular portion.

In FIG. 19, the annular sliding surface 61a of the Oldham joint 34 is the bottom surface 7 of the bearing support 7, which is a stationary member.
The oscillating scroll 2 is in contact with a and is a rotating member.
Along with the reciprocating movement of the Oldham joint 34 due to the rocking, the annular sliding surface 61a slides on the bearing support bottom surface 7a. A thrust bearing 35 is mounted on the bottom surface 7a.
Also, a large amount of lubricating oil carried by the suction refrigerant is attached, and as shown in FIG.
As oil enters the groove b, the first oil groove 100a communicating with the second oil groove 100b is filled with oil. As a result, oil is sufficiently spread over the sliding surface 61a of the Oldham joint annular portion, and the first oil groove 100
a through the bearing fitting pawl 59 which is the first guide.
and an oil hole 101 communicating with the first oil groove 100a.
Oil is actively supplied through the second guide to the swinging scroll fitting guide groove 101.

Further, the present invention can also be applied to cases where a scroll is used in an expander. Furthermore, although the annular shape has been described above, a disk shape may also be used, and in this case, it is used as an Oldham joint for a rotating shaft or the like.

As described above, according to the present invention, lubricating oil is actively supplied to each sliding part of the Oldham joint, making it difficult for seizure accidents due to poor lubrication to occur, and it is expected that the service life will be extended due to improved wear resistance. There are effects such as

[Brief explanation of drawings]

Figure 1 is a diagram of the operating principle of a scroll compressor, Figure 2
The figure is a sectional view showing an example of a scroll compressor.
Figure 3 is a - line sectional view of Figure 2, Figure 4 is a cross-sectional view of Figure 2.
5 is a perspective view showing a fixed scroll, FIG. 6 is a perspective view showing an oscillating scroll, FIG. 7 is a perspective view showing an oscillating scroll, and FIG.
9 is a perspective view showing a conventional Oldham joint, FIG. 10 is a perspective view showing the crankshaft, FIG. 11 is a perspective view showing the first balance, FIG. Figure 13 is a perspective view showing the motor rotor, Figure 14 is a compressor assembly diagram, Figure 15,
Figure 6 is an assembly diagram of the entire compressor including the shell. FIG. 17 is a plan view showing an embodiment of the present invention;
Fig. 18 shows the A-A cross section of Fig. 17, Figs. 19 and 20 show the Oldham joint of Figs. 17 and 18 assembled into a scroll compressor, and Fig. It is a BB cross section in the figure. In the figure, 34 is an Oldham joint, 59 is a bearing fitting pawl, 60 is a fitting guide groove, 61 is a ring, 1
00a and 100b are first and second oil grooves, respectively;
101 is an oil hole.

Claims (1)

[Claims] 1 Disposed between a stationary member and a rotating member that face each other, engages with the stationary member on one side of the annular portion, and moves the annular portion toward the stationary member in a first annular manner. a first guide that reciprocates only in a radial direction; and a first guide that engages with the rotating member on the other side of the annular portion and moves the rotating member with respect to the annular portion of the first annular portion; A second guide is provided for reciprocating only in the radial direction of the second annular portion perpendicular to the radial direction, and the rotating member is moved by combining the reciprocating movements of the first and second annular portions in the radial direction. In the Oldham joint that performs revolution movement while preventing rotation, the first oil groove extends in the circumferential direction on one surface side of the annular portion and supplies lubricating oil to the first guide; The lubricating oil is communicated with the first oil groove and opens in the radial direction of the first annular part, and is supplied to the first oil groove by reciprocating movement of the annular part in the radial direction of the first annular part. The second step is to introduce
an oil groove, the first or second oil groove, and the second oil groove.
An Oldham joint characterized by having an oil hole that communicates with the guide.