JP7540376B2 - Scroll Compressor - Google Patents

Description

The present invention relates to a scroll compressor.

A scroll-type compressor prevents the orbiting scroll from rotating on its axis and allows the orbiting scroll to revolve around the fixed scroll. To allow the orbiting scroll to revolve, the scroll-type compressor is equipped with a rotation prevention mechanism.

In the scroll compressor disclosed in Patent Document 1, multiple ring holes are provided on the inner end surface of the front case. Four protrusions are provided on the inner wall of the ring holes at 90 degree intervals. Rings are loosely fitted into the ring holes. The rings are supported at parts of their circumference by the multiple protrusions. In other words, the rings are loosely fitted into the ring holes. Multiple pins are inserted into the end surface on the rear side of the orbiting scroll. Each pin is loosely inserted into the corresponding ring.

The orbiting scroll engages with the front case by a pin loosely inserted into the ring, preventing it from rotating on its axis as it revolves. At this time, the pin rotates in the same direction as the orbiting scroll along the inner circumferential surface of the ring.

In this type of scroll compressor, the pin that receives the moment acting on the orbiting scroll switches four times during one rotation of the orbiting scroll. At each switch, the load is received by the ring.

JP 2012-184774 A

However, the parts of the ring that are supported by the protrusions have higher rigidity than the parts that are not supported by the protrusions. On the other hand, the parts of the ring that are not supported by the protrusions have lower rigidity than the parts that are supported by the protrusions. As such, there are parts of high rigidity and parts of low rigidity in the circumferential direction of the ring, and because of this, the way that the load is received differs depending on the difference in rigidity, which causes vibration and noise.

The scroll-type compressor for solving the above problems includes a housing, a rotating shaft accommodated in the housing, a fixed scroll, an orbiting scroll that orbits relative to the fixed scroll, a rotation prevention mechanism that prevents the orbiting scroll from rotating on its axis and revolves the orbiting scroll relative to the fixed scroll, and a housing component that faces the orbiting scroll and supports the orbiting scroll and the rotating shaft, and the rotation prevention mechanism has a storage section provided on a first surface of either the orbiting scroll or the housing component, and a plurality of rotation prevention pins provided on a second surface of the other of the orbiting scroll and opposed to the first surface and protruding toward the storage section, and the rotation prevention pins come into contact with the storage section, thereby preventing the rotation of the orbiting scroll. The gist of the scroll-type compressor is that the second surface is provided with cylindrical holding walls that hold the plurality of rotation prevention pins.

With this, the cylindrical retaining wall is not supported locally from its outer periphery, so the rigidity of the retaining wall is uniform in the circumferential direction, and the rigidity of the portion that holds the rotation-prevention pin can be reduced. Therefore, when the rotation-prevention pin receives the load from the orbiting scroll, the load can be received uniformly no matter where in the circumferential direction of the retaining wall, while the retaining wall can be tilted to receive the load. As a result, the fluctuations of the rotation-prevention pin when receiving the load can be made gentler, reducing vibration and noise.

For scroll compressors, the second surface may have a groove formed on the outer periphery of the retaining wall, and the depth from the tip surface of the retaining wall to the inner bottom surface of the retaining wall may be the same as the depth of the groove.

With this, the rotation-prevention pin is more likely to tilt when a load is applied to it, compared to when the retaining wall is deeper than the groove.
In a scroll-type compressor, the housing component has an insertion hole through which the rotating shaft is inserted, and has a compression chamber formed by meshing between the fixed scroll and the orbiting scroll and whose volume decreases with rotation of the rotating shaft, and has an oil supply passage connecting a discharge pressure region into which refrigerant compressed in the compression chamber is discharged and the insertion hole and supplying lubricating oil from the discharge pressure region to the insertion hole, the rotation-prevention pin is provided on the housing component, and the second surface of the housing component has a groove formed on an outer periphery of the retaining wall, and the groove may open to an inner surface of the housing component that defines the insertion hole.

With this, the lubricating oil in the discharge pressure region is supplied to the insertion hole through the oil supply passage. Since a groove is opened on the inner peripheral surface of the housing component, the lubricating oil supplied to the insertion hole is supplied into the groove. The lubricating oil supplied into the groove is supplied to the sliding part between the rotation prevention pin and the housing part, so that the sliding part between the rotation prevention pin and the housing part can be lubricated.

In the scroll compressor, a bearing for supporting the rotating shaft may be press-fitted into an inner circumferential surface of the housing component that defines the insertion hole.
According to this, deformation that occurs when the bearing is press-fitted into the inside of the housing component can be absorbed by the groove, so deformation of the housing component can be suppressed.

The present invention can reduce vibration and noise.

1 is a cross-sectional view showing a scroll compressor according to an embodiment; FIG. 13 is a perspective view showing the anti-rotation pin, the retaining wall, and the groove. FIG. FIG. FIG. 4 is an enlarged cross-sectional view showing the anti-rotation pin, the retaining wall, and the groove. FIG. 4 is a cross-sectional view showing another example of a scroll compressor.

A scroll compressor according to one embodiment will now be described with reference to Figures 1 to 5. The scroll compressor of this embodiment is used in, for example, a vehicle air conditioner.
As shown in FIG. 1, a scroll compressor 10 includes a housing 11, a rotating shaft 12 accommodated in the housing 11, an electric motor 20 that rotates the rotating shaft 12, and a compression mechanism 40 that is driven by the rotation of the rotating shaft 12.

The housing 11 is composed of a motor housing component 13, a compression housing component 15, a discharge housing component 24, a fixed base plate 42 of the fixed scroll 41, and an inverter cover 36. The motor housing component 13, the compression housing component 15, the discharge housing component 24, and the fixed base plate 42 of the fixed scroll 41 are fixed by a number of bolts 38.

The motor housing component 13 has a plate-shaped end wall 13a, a peripheral wall 13b extending cylindrically from the outer periphery of the end wall 13a, an intake port 13c provided in the peripheral wall 13b, and a boss portion 13d provided in the end wall 13a. The axial direction of the peripheral wall 13b coincides with the axial direction of the rotating shaft 12. The peripheral wall 13b has first bolt insertion holes 13e. Each of the first bolt insertion holes 13e is recessed from the tip surface of the peripheral wall 13b. The first bolt insertion holes 13e of the motor housing component 13 have a female thread.

The suction port 13c is provided to draw the refrigerant into the housing 11. The suction port 13c is disposed in the peripheral wall 13b. The boss portion 13d protrudes cylindrically from the inner surface of the end wall 13a toward the inside of the housing 11. The tip surface of the peripheral wall 13b is in contact with the compression housing component 15.

The compression housing component 15 is sandwiched between the tip surface of the peripheral wall 13b and the fixed base plate 42 of the fixed scroll 41. The compression housing component 15 has a cylindrical journal portion 16 and a chamber-forming peripheral wall portion 18 that extends cylindrically from the outer periphery of the journal portion 16. A second bolt insertion hole 18b is formed in the tip surface 18a of the chamber-forming peripheral wall portion 18. The second bolt insertion hole 18b penetrates the chamber-forming peripheral wall portion 18.

The compression housing component 15 has an insertion hole 16a in the center of the shaft support portion 16 through which the rotating shaft 12 is inserted. The insertion hole 16a has a small diameter hole 16b and a large diameter hole 16c that is larger in diameter than the small diameter hole 16b. The small diameter hole 16b is located closer to the end wall 13a than the large diameter hole 16c.

As shown in FIG. 2, the compression housing component 15 has an opposing surface 15a on the end surface of the bearing portion 16 where the large diameter hole 16c opens. The opposing surface 15a is a flat annular surface. The compression housing component 15 has four rotation prevention pins 17 protruding from the opposing surface 15a. Therefore, the opposing surface 15a is the second surface from which the rotation prevention pins 17 protrude. The rotation prevention pins 17 are arranged at equal intervals around the large diameter hole 16c.

As shown in FIG. 1, the motor housing component 13 and the compression housing component 15 define a motor chamber M within the housing 11. Thus, the scroll compressor 10 has a motor chamber M. The electric motor 20 is housed in the motor chamber M. Refrigerant is drawn into the motor chamber M, which is inside the housing 11, from an external refrigerant circuit (not shown) via the suction port 13c. Thus, the motor chamber M is a suction pressure area.

The electric motor 20 has a stator 21 and a rotor 22 arranged inside the stator 21. The rotor 22 rotates integrally with the rotating shaft 12. The stator 21 surrounds the rotor 22.

The first axial end of the rotating shaft 12 is inserted into the boss portion 13d. A bearing 14 is provided between the inner peripheral surface of the boss portion 13d and the peripheral surface of the first end of the rotating shaft 12. The first end of the rotating shaft 12 is supported by the motor housing component 13 via the bearing 14.

The second end of the rotating shaft 12 is inserted through the insertion hole 16a. The end face 12a of the second end of the rotating shaft 12 is located inside the shaft support portion 16. A bearing 19 is provided between the circumferential surface of the second end of the rotating shaft 12 and the inner circumferential surface of the compression housing component 15 at the small diameter hole 16b. The rotating shaft 12 is rotatably supported by the compression housing component 15 via the bearing 19.

The bearing 19 has an outer ring 19a press-fitted into the inner circumferential surface of the bearing portion 16, an inner ring 19b that rotates integrally with the rotating shaft 12, and rolling elements 19c arranged between the inner circumferential surface of the outer ring 19a and the outer circumferential surface of the inner ring 19b. Therefore, the bearing 19 for supporting the rotating shaft 12 is press-fitted into the inner circumferential surface of the compression housing component 15 that defines the insertion hole 16a.

The discharge housing component 24 has a chamber forming recess 25, an oil separation chamber 26, a discharge port 27, and a discharge hole 28.
The discharge housing component 24 has an end surface 24a on the side of the fixed base plate 42. A third bolt insertion hole 24b that opens to the end surface 24a is formed in the discharge housing component 24. The third bolt insertion hole 24b passes through the discharge housing component 24.

The chamber-forming recess 25 is recessed from the end surface 24a of the discharge housing component 24. The discharge chamber 30 is defined in the space surrounded by the chamber-forming recess 25 and the fixed base plate 42. Therefore, the scroll compressor 10 has a discharge chamber 30.

The discharge port 27 is connected to an external refrigerant circuit (not shown). The oil separation chamber 26 is connected to the discharge port 27. An oil separation tube 31 is provided in the oil separation chamber 26. The discharge hole 28 connects the discharge chamber 30 and the oil separation chamber 26.

The inverter cover 36 is attached to the end wall 13a of the motor housing component 13. The inverter device 37 is housed in the space defined by the inverter cover 36 and the end wall 13a of the motor housing component 13. The scroll compressor 10 has the inverter device 37. This inverter device 37 drives the electric motor 20.

The scroll type compressor 10 has the fixed scroll 41 and the orbiting scroll 51 that orbits relative to the fixed scroll 41. The compression mechanism 40 has the fixed scroll 41 and the orbiting scroll 51. The fixed scroll 41 and the orbiting scroll 51 are disposed on the opposite side of the motor chamber M, with the journal portion 16 of the compression housing component 15 sandwiched between them. The compression housing component 15 also faces the orbiting scroll 51 and supports it.

The fixed scroll 41 has a fixed base plate 42 , a fixed scroll wall 43 standing upright from the fixed base plate 42 , a fixed outer peripheral wall 44 , and a discharge hole 45 .
A fourth bolt insertion hole 42b is formed in the fixed base plate 42. The fourth bolt insertion hole 42b penetrates the fixed base plate 42 in the thickness direction. The discharge hole 45 is disposed in the center of the fixed base plate 42. The discharge hole 45 is a circular hole. The discharge hole 45 also penetrates the fixed base plate 42 in the thickness direction. A discharge valve mechanism 45a that opens and closes the discharge hole 45 is attached to an end face 42a of the fixed base plate 42 opposite to the orbiting scroll 51.

The outer periphery of the fixed base plate 42 is sandwiched between the tip surface 18a of the chamber forming peripheral wall portion 18 of the compression housing component 15 and the end surface 24a of the discharge housing component 24. A bolt 38 is inserted through the third bolt insertion hole 24b, the fourth bolt insertion hole 42b, the second bolt insertion hole 18b, and the first bolt insertion hole 13e, and the bolt 38 is screwed into the female thread of the first bolt insertion hole 13e. As a result, the discharge housing component 24, the fixed base plate 42, the compression housing component 15, and the motor housing component 13 are fixed in contact with each other in the axial direction of the rotating shaft 12.

The fixed spiral wall 43 stands up from the fixed base plate 42 toward the orbiting scroll 51. The fixed outer peripheral wall 44 stands up cylindrically from the outer periphery of the fixed base plate 42. The fixed outer peripheral wall 44 surrounds the fixed spiral wall 43. An introduction recess (not shown) is formed in the fixed outer peripheral wall 44.

The orbiting scroll 51 has a orbiting base plate 52 , a orbiting spiral wall 53 , a boss portion 54 , and four housing portions 55 .
The orbiting base plate 52 is disk-shaped. The orbiting base plate 52 faces the fixed base plate 42. The orbiting spiral wall 53 stands up from the orbiting base plate 52 toward the fixed base plate 42. The orbiting spiral wall 53 meshes with the fixed spiral wall 43. The orbiting spiral wall 53 is located inside the fixed outer peripheral wall 44. A clearance (not shown) is secured between the tip surface of the fixed spiral wall 43 and the orbiting base plate 52, and a clearance (not shown) is secured between the tip surface of the orbiting spiral wall 53 and the fixed base plate 42. A plurality of compression chambers 46 are defined by the meshing of the fixed spiral wall 43 and the orbiting spiral wall 53. That is, the compression chambers 46 are formed by the meshing of the fixed scroll 41 and the orbiting scroll 51.

The boss portion 54 protrudes cylindrically from the back surface 52a of the rotating base plate 52 on the side opposite the fixed base plate 42. The back surface 52a faces the opposing surface 15a of the compression housing component 15. The axial direction of the boss portion 54 coincides with the axial direction of the rotating shaft 12.

As shown in FIG. 3, the four storage sections 55 are arranged around the boss portion 54 on the back surface 52a of the rotating base plate 52. The four storage sections 55 are arranged at equal intervals in the circumferential direction of the rotating shaft 12. Each storage section 55 is formed inside an annular ring member 55a arranged inside the recess 55b. The outer peripheral surface of the ring member 55a is in contact with the inner peripheral surface of the recess 55b. A rotation prevention pin 17 protruding from the shaft support portion 16 of the compression housing component 15 toward the storage section 55 is inserted inside each storage section 55. Therefore, the rotation prevention mechanism of the scroll compressor 10 has a plurality of storage sections 55 provided on the back surface 52a and rotation prevention pins 17 provided on the opposing surface 15a facing the back surface 52a and protruding toward the storage section 55. One of the orbiting scroll 51 and the compression housing component 15 is the orbiting scroll 51, and the back surface 52a of the orbiting scroll 51 is the first surface. In addition, the other of the orbiting scroll 51 and the compression housing component 15 is the compression housing component 15, and the opposing surface 15a of the compression housing component 15 is the second surface.

As shown in FIG. 1, an eccentric shaft 47 is disposed on the end surface 12a of the rotating shaft 12. The eccentric shaft 47 protrudes toward the orbiting scroll 51 from a position eccentric to the axis L of the rotating shaft 12. The axial direction of the eccentric shaft 47 coincides with the axial direction of the rotating shaft 12. The eccentric shaft 47 is inserted into the boss portion 54. A bush 49 is fitted to the outer circumferential surface of the eccentric shaft 47. A balance weight 48 is integrated with the bush 49. The balance weight 48 is housed in the large diameter hole 16c. The orbiting scroll 51 is supported by the eccentric shaft 47 via the bush 49 and the bearing 50 so as to be rotatable relative to the eccentric shaft 47.

The scroll compressor 10 has an oil supply passage 39 that connects the oil separation chamber 26 and the large diameter hole 16c. The oil supply passage 39 has a first end connected to the oil separation chamber 26 and a second end connected to the large diameter hole 16c.

The oil supply passage 39 has a first passage 39a, a second passage 39b, and a third passage 39c. The first passage 39a is a passage provided in the discharge housing component 24. The first end of the first passage 39a is connected to the oil separation chamber 26. The second end of the first passage 39a is located at the end surface 24a.

The second passage 39b is formed in the fixed scroll 41. The second passage 39b penetrates the fixed scroll 41 in the thickness direction.
The third passage 39c is formed in the opposing surface 15a of the compression housing component 15. The third passage 39c extends in the radial direction of the journal portion 16 from the outer circumferential side of the journal portion 16 toward the inner circumferential surface thereof.

The second end of the first passage 39a is connected to the first end of the second passage 39b. The second end of the second passage 39b is connected to the first end of the third passage 39c. The second end of the third passage 39c opens to the inner circumferential surface of the large diameter hole 16c. The first passage 39a of the oil supply passage 39 is connected to the oil separation chamber 26. Therefore, the oil supply passage 39 is filled with lubricating oil, and lubricating oil is supplied to the inner circumferential surface of the large diameter hole 16c.

In the scroll compressor 10 configured as described above, the rotation of the rotating shaft 12 is transmitted to the orbiting scroll 51 via the eccentric shaft 47, the bush 49, and the bearing 50. At this time, the rotation prevention pin 17 rotates in the same direction as the revolution direction of the orbiting scroll 51 along the inner circumferential surface of the ring member 55a.

When each storage section 55 comes into contact with the tip 17b of the rotation prevention pin 17, the rotation of the orbiting scroll 51 is prevented, and the orbiting scroll 51 revolves. As a result, the orbiting scroll 51 revolves while the orbiting spiral wall 53 is in contact with the fixed spiral wall 43 due to the rotation of the rotating shaft 12, and the volume of the compression chamber 46 decreases.

The rotation prevention pin 17, which receives the moment acting on the orbiting scroll 51, switches four times during one rotation of the orbiting scroll 51. At the timing of the switch, the rotation prevention pin 17 and the storage section 55 come into contact. At this time, the load is received by the rotation prevention pin 17.

The refrigerant sucked into the motor chamber M through the suction port 13c passes through the introduction recess of the compression housing component 15 and the fixed scroll 41 and is sucked into the outermost part of the compression chamber 46. The refrigerant sucked into the outermost part of the compression chamber 46 is compressed in the compression chamber 46 by the revolution of the orbiting scroll 51.

The refrigerant compressed in the compression chamber 46 is discharged from the discharge hole 45 through the discharge valve mechanism 45a to the discharge chamber 30. The refrigerant discharged to the discharge chamber 30 is discharged through the discharge hole 28 to the oil separation chamber 26. The lubricating oil contained in the refrigerant discharged to the oil separation chamber 26 is separated from the refrigerant by the oil separation tube 31.

The refrigerant from which the lubricating oil has been separated flows into the oil separation tube 31 and is discharged from the discharge port 27 to the external refrigerant circuit. The refrigerant discharged to the external refrigerant circuit flows back to the motor chamber M via the suction port 13c. Meanwhile, the lubricating oil separated from the refrigerant by the oil separation tube 31 is supplied from the oil separation chamber 26, which serves as a discharge pressure region, to the large diameter hole 16c via the oil supply passage 39. Therefore, the oil supply passage 39 connects the oil separation chamber 26, from which the refrigerant compressed in the compression chamber 46 is discharged, to the large diameter hole 16c, and supplies the lubricating oil from the oil separation chamber 26 to the large diameter hole 16c.

Next, the installation structure of the rotation prevention pin 17 in the compression housing component 15 will be described.
2, 4, and 5, the compression housing component 15 has a plurality of retaining walls 72 and a plurality of grooves 70. Since the configurations of the plurality of grooves 70 are all the same, one groove 70 will be described and descriptions of the other grooves 70 will be omitted. Since the configurations of the plurality of retaining walls 72 are all the same, one retaining wall 72 will be described and descriptions of the other retaining walls 72 will be omitted.

The groove 70 is recessed from the opposing surface 15a of the shaft support portion 16 in the axial direction of the rotating shaft 12. The grooves 70 are arranged at equal intervals around the insertion hole 16a. The grooves 70 open toward the large diameter hole 16c on the inner peripheral surface of the shaft support portion 16 that defines the insertion hole 16a. The front view of the compression housing component 15 is when viewed from the opposing surface 15a. In the front view of the compression housing component 15, the groove 70 has a bottom surface 70a, which is a part of the opposing surface 15a, at the end of the recess from the opposing surface 15a. The groove 70 has an inner wall surface 70b that connects the bottom surface 70a and the opposing surface 15a. Therefore, the groove 70 is defined by the bottom surface 70a, the inner wall surface 70b, and the outer peripheral surface of the retaining wall 72.

The retaining wall 72 retains the base end 17a of the rotation prevention pin 17. The retaining wall 72 stands cylindrically from the bottom surface 70a of the groove 70, which is part of the opposing surface 15a. A pin hole 71 is formed on the inside of the retaining wall 72. The pin hole 71 is cylindrically recessed from the tip surface 72a of the retaining wall 72. The tip surface 72a of the retaining wall 72 is an annular surface that surrounds the pin hole 71.

The groove 70 is formed on the outer periphery of the retaining wall 72. In other words, the scroll compressor 10 has a groove 70 formed on the outer periphery of the retaining wall 72 on the opposing surface 15a. This groove 70 separates the entire outer periphery of the retaining wall 72 from the inner wall surface 70b.

The tip surface 72a of the retaining wall 72 is located at the same height as the opposing surface 15a of the shaft support portion 16. The depth F1 of the groove 70 is from the opposing surface 15a to the bottom surface 70a of the groove 70. The depth F2 of the retaining wall 72 is from the tip surface 72a of the retaining wall 72 to the inner bottom surface 72b. The depth F1 of the groove 70 and the depth F2 of the retaining wall 72 are the same.

The base end 17a of the rotation prevention pin 17 is press-fitted into the pin hole 71. This press-fit holds the base end 17a of the rotation prevention pin 17 in the retaining wall 72. The end face of the rotation prevention pin 17 closer to the base end 17a is in contact with the inner bottom surface 72b of the retaining wall 72. The dimension of the base end 17a of the rotation prevention pin 17 is the same as the depth F2 of the retaining wall 72. The thickness of the retaining wall 72 is set to a value that can hold the base end 17a of the rotation prevention pin 17 so that it does not slip out of the retaining wall 72.

The portion of the rotation prevention pin 17 that is not held by the retaining wall 72 is referred to as the tip 17b. The tip 17b of the rotation prevention pin 17 is a portion that protrudes from the tip surface 72a of the retaining wall 72. The tip surface 72a of the retaining wall 72 is at the same height as the opposing surface 15a of the pivot support portion 16. Therefore, it can be said that the tip 17b of the rotation prevention pin 17 protrudes from the opposing surface 15a of the pivot support portion 16. The tip 17b of the rotation prevention pin 17 protrudes toward the storage portion 55 and is inserted inside the storage portion 55.

Next, the operation of the scroll compressor 10 will be described.
In the scroll compressor 10, the rotation-preventing pins 17 that receive the moment acting on the orbiting scroll 51 are switched four times during one rotation of the orbiting scroll 51. At the time of the switching, the rotation-preventing pins 17 come into contact with the housing portion 55. At this time, the load is received by each rotation-preventing pin 17.

The retaining wall 72 that holds the base end 17a of the rotation prevention pin 17 is erected in a cylindrical shape, so the entire outer circumferential surface of the retaining wall 72 is separated from the inner wall surface 70b. Therefore, when the rotation prevention pin 17 receives a load, it easily tilts together with the retaining wall 72. As a result, compared to when the rotation prevention pin 17 does not tilt, vibration and noise are reduced when the rotation prevention pin 17 comes into contact with the housing portion 55.

According to the above embodiment, the following advantageous effects can be obtained.
(1) The rotation prevention pin 17 is held by a cylindrical retaining wall 72. The entire outer circumferential surface of the retaining wall 72 is separated from the inner wall surface 70b. Since the retaining wall 72 is not supported locally from the outer circumferential side, the rigidity of the retaining wall 72 is uniform in the circumferential direction. In addition, the rigidity of the retaining wall 72 is reduced compared to the case where the rotation prevention pin 17 is press-fitted into the opposing surface 15a without providing the retaining wall 72. Therefore, when the rotation prevention pin 17 receives a load from the orbiting scroll 51, the load can be received by tilting the retaining wall 72 while receiving the load uniformly at any location in the circumferential direction of the retaining wall 72. As a result, the fluctuation when the rotation prevention pin 17 receives the load can be made gentler, thereby reducing vibration and noise.

(2) One of the four rotation prevention pins 17 may be positioned out of place from the ideal position. The misaligned rotation prevention pin 17 is subjected to the load applied to the other three rotation prevention pins 17, but because the rotation prevention pin 17 is held by the retaining wall 72, the rotation prevention pin 17 is prone to tilting away from the retaining wall 72. This reduces vibration and noise when the rotation prevention pin 17 comes into contact with the housing section 55.

(3) The depth F1 of the groove 70 and the depth F2 of the retaining wall 72 are the same. For example, compared to when the depth F2 of the retaining wall 72 is deeper than the depth F1 of the groove 70, it is easier to tilt the rotation-prevention pin 17 away from the retaining wall 72 when a load is applied to the rotation-prevention pin 17.

(4) The groove 70 separates the entire outer peripheral surface of the retaining wall 72 from the inner wall surface 70b, making it easier to tilt the rotation prevention pin 17 away from the retaining wall 72. This reduces vibration and noise when the rotation prevention pin 17 comes into contact with the housing portion 55. Therefore, in order to reduce vibration and noise, it is not necessary to precisely position the rotation prevention pin 17 so that it is not misaligned, or to increase the number of rotation prevention pins 17, and this can suppress increases in manufacturing costs to implement these measures.

(5) In the compression housing component 15, the groove 70 separates the entire outer circumferential surface of the retaining wall 72 from the inner wall surface 70b, thereby reducing vibration and noise when the rotation prevention pin 17 and the housing portion 55 come into contact. The groove 70 is formed by cutting the bearing portion 16, which allows the compression housing component 15 to be made lighter.

(6) The groove 70 is provided in the journal portion 16 of the compression housing component 15. Therefore, the groove 70 can absorb the deformation of the journal portion 16 when the outer ring 19a is press-fitted to the inside of the journal portion 16. Therefore, deformation of the journal portion 16 can be suppressed.

(7) The third passage 39c of the oil supply passage 39 is connected to the large diameter hole 16c. The large diameter hole 16c is supplied with lubricating oil from the oil supply passage 39. The groove 70 is connected to the large diameter hole 16c. Therefore, the lubricating oil supplied to the large diameter hole 16c is supplied into the groove 70. As a result, the lubricating oil in the groove 70 can be supplied to the sliding portion between the rotation prevention pin 17 and the housing portion 55, so that the sliding portion can be lubricated.

(8) In order to ease fluctuations when the rotation prevention pin 17 receives a load, it is possible to hold the ring member 55a with a cylindrical holding portion and to lower the rigidity of the holding portion by separating the outer circumferential surface of the holding portion from the surroundings. If the holding portion of the ring member 55a and the holding wall 72 are made the same thickness, the smaller diameter holding wall 72 will have lower rigidity. Therefore, in order to lower the rigidity of the holding portion to the same extent as the holding wall 72, it is necessary to reduce the thickness of the holding portion of the ring member 55a. Therefore, by employing a holding wall 72 that holds the rotation prevention pin 17, noise and vibration can be reduced with simple processing.

This embodiment can be modified as follows: This embodiment and the following modifications can be combined with each other to the extent that there is no technical contradiction.
The groove 70 may be provided without opening to the inner circumferential surface of the bearing portion 16. In this case, the groove 70 has an annular shape.

As shown in FIG. 6, the opposing surface 15a of the journal portion 16 in the compression housing component 15 is the first surface. A storage section 55 is provided on this opposing surface 15a. The back surface 52a of the orbiting scroll 51 is the second surface, and the rotation prevention pin 17 protrudes from the back surface 52a toward the storage section 55. A retaining wall 72 may be provided on the orbiting base plate 52 of the orbiting scroll 51, and a groove 70 may also be provided.

The depth F1 of the groove 70 and the depth F2 of the retaining wall 72 may be different.
The bearing 19 may be fixed to the journal portion 16 by a method other than press fitting.
The third passage 39c of the oil supply passage 39 does not have to communicate with the insertion hole 16a.

In this case, the recess 55b itself serves as the accommodation portion 55, and the tip 17b of the rotation-prevention pin 17 abuts against the inner circumferential surface of the recess 55b.
An oil reservoir for oil discharged from the oil separation chamber 26 may be provided in the housing 11. The oil reservoir serves as a discharge pressure region. The first end of the oil supply passage 39 may be connected to the oil reservoir.

The numbers of the rotation prevention pins 17 and the receiving portions 55 may be changed.
Instead of providing the groove 70 in the opposing surface 15a of the compression housing component 15, the retaining wall 72 may be provided upright on the opposing surface 15a.

Although the scroll compressor 10 is driven by the electric motor 20 in the above embodiment, the scroll compressor 10 may be driven by power from an internal combustion engine.
The technical ideas that can be understood from the above-described embodiment and modified examples will be described.

(a) The rotation prevention pin is press-fitted into the retaining wall.

10...Scroll compressor, 11...Housing, 12...Rotating shaft, 15...Compression housing component, 15a...Opposite surface as second surface, 16a...Through hole, 17...Rotation prevention pin, 19...Bearing, 26...Oil separation chamber as discharge pressure area, 39...Oil supply passage, 41...Fixed scroll, 46...Compression chamber, 51...Orbiting scroll, 52a...Back surface as first surface, 55...Storage section, 70...Groove, 72...Retaining wall, 72a...Tip surface, 72b...Inner bottom surface.

Claims (3)

Housing and
A rotating shaft accommodated in the housing;
Fixed scrolling and
a rotating scroll that rotates relative to the fixed scroll;
a rotation prevention mechanism that prevents the orbiting scroll from rotating and causes the orbiting scroll to revolve relative to the fixed scroll;
a housing component supporting the orbiting scroll and supporting the rotation shaft while facing the orbiting scroll,
The rotation prevention mechanism includes a storage portion provided on a first surface of either the orbiting scroll or the housing component, and a rotation prevention pin provided on a second surface of the other of the orbiting scroll and the housing component facing the first surface and protruding toward the storage portion.
In a scroll-type compressor in which the rotation of the orbiting scroll is prevented by the accommodation portion and the rotation-preventing pin coming into contact with each other,
A cylindrical holding wall that holds the plurality of rotation-prevention pins is provided upright on the second surface , and
the second surface has a groove formed on an outer periphery of the retaining wall, and a depth from a tip surface of the retaining wall to an inner bottom surface of the retaining wall is the same as a depth of the groove . Housing and
A rotating shaft accommodated in the housing;
Fixed scrolling and
a rotating scroll that rotates relative to the fixed scroll;
a rotation prevention mechanism that prevents the orbiting scroll from rotating and causes the orbiting scroll to revolve relative to the fixed scroll;
a housing component supporting the orbiting scroll and supporting the rotation shaft while facing the orbiting scroll,
The rotation prevention mechanism includes a storage portion provided on a first surface of either the orbiting scroll or the housing component, and a rotation prevention pin provided on a second surface of the other of the orbiting scroll and the housing component facing the first surface and protruding toward the storage portion.
In a scroll-type compressor in which the rotation of the orbiting scroll is prevented by the accommodation portion and the rotation-preventing pin coming into contact with each other,
A cylindrical holding wall that holds the plurality of rotation-prevention pins is provided upright on the second surface ,
The housing member has an insertion hole through which the rotating shaft is inserted,
a compression chamber formed by meshing of the fixed scroll and the orbiting scroll, the volume of which is reduced by rotation of the rotary shaft;
an oil supply passage connecting a discharge pressure region into which the refrigerant compressed in the compression chamber is discharged and the insertion hole, and supplying lubricating oil from the discharge pressure region to the insertion hole;
the rotation prevention pin is provided on the housing component, the second surface of the housing component has a groove formed on an outer periphery of the retaining wall, the groove opening into an inner circumferential surface of the housing component that defines the insertion hole, the scroll type compressor characterized in that 3. The scroll compressor according to claim 2 , wherein a bearing for supporting the rotating shaft is press-fitted into an inner circumferential surface of the housing component that defines the insertion hole.