JP2015083780A - Electric scroll compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric scroll compressor capable of improving performance and reliability of the compressor by improving accuracy in assembling pins when engagement of pins is employed as a constitution of a rotation preventing mechanism of a rocking scroll.SOLUTION: In an electric scroll compressor 1 in which a housing member (motor accommodation housing member 6) is constituted by integrally forming a motor fixing portion 6a to which an electric motor 4 is fixed, and an end plate 6b supporting an axial load of a rocking scroll 22 and rotatably supporting a driving shaft 14, and a rotation preventing mechanism is composed of a plurality of pins 51 disposed in the circumferential direction between a base plate 22a of the rocking scroll 22 and the end plate 6b, and a plurality of cylindrical recessed portions 53 engaged with the pins 51, the cylindrical recessed portions 53 are formed on the base plate 22a of the rocking scroll 22, and the pins 51 are fixed to the end plate 6b.

Description

  The present invention relates to an electric scroll compressor used in a refrigeration cycle or the like of a vehicle air conditioner, and in particular, includes an anti-rotation mechanism for an orbiting scroll having a pin and a recess engaged with the pin or a ring member accommodated in the recess. It is related with the electric scroll compressor comprised.

  As an electric scroll compressor, conventionally, for example, a configuration as shown in Patent Document 1 described below is known. This is provided with a discharge port, a discharge housing for accommodating a compression part (compression mechanism) configured by disposing a fixed scroll and a movable scroll, a suction housing having a suction port, a discharge housing, and a suction housing. And an intermediate housing that houses the electric motor together with the suction housing. The intermediate housing includes a motor fixing portion that accommodates and fixes a part of the electric motor, and a discharge housing side of the motor fixing portion. And a bearing support portion (end plate) that supports the drive shaft via the bearing.

  The compression mechanism used here is known per se, and includes a fixed scroll having a substrate and a spiral wall standing upright from the substrate, and a spiral placed upright from the substrate and the substrate in opposition to the fixed scroll. And a pair of scrolls combined with each of the spiral walls, and the swing scroll is engaged with an eccentric shaft provided on a drive shaft that is driven to rotate by an electric motor housed in the housing. By rotating (revolving motion), the compression chamber formed between the scroll walls of both scrolls is moved to the center while reducing the volume, and the fluid to be compressed is compressed.

In such an electric scroll compressor, since an autorotation force is generated in the orbiting scroll as the drive shaft rotates, an anti-rotation mechanism for preventing the orbiting scroll from rotating is provided.
Conventionally, as such an anti-rotation mechanism, an Oldham coupling, a pin & ring coupling, a ball coupling, etc. are provided between the bottom plate (substrate) of the movable scroll (oscillating scroll) and one end surface of the intermediate housing. Although used, in the above-described electric scroll compressor, as can be understood from the drawing of the publication, a ball coupling using a ball as a rolling member is used, and in particular, a race and a ring are integrally press-molded. A coupling composed of two plates and steel balls (balls) disposed between them is used (see Non-Patent Document 1).

JP 2000-291557 A

Katagiri, 1 other, "EM coupling for scroll compressor", NTN TECHNICAL REVIEW, No. 68 (2000), p.67-70

  However, when the above-described coupling is used as a mechanism for preventing rotation of the movable scroll (oscillating scroll), a rigid sphere is supported on the bottom plate (substrate) of the movable scroll (oscillating scroll) and one end surface of the intermediate housing. Even if there is variation in the mounting state of the plate, it is a structure that can be tolerated to some extent, so it does not greatly affect the performance of the compressor, but when adopting a structure that engages the pin as a rotation prevention mechanism, Depending on the fixed state, there is a disadvantage that greatly affects the performance and reliability of the compressor.

In particular, when the pins are fixed by press-fitting them into the substrate of the orbiting scroll, the orbiting scroll is lighter and thinner with emphasis on driveability, and is relatively rigid compared to a fixing member such as a housing. Therefore, when the pin is pressed in, the press-fitted portion of the orbiting scroll is deformed and the pin tilts, or when the pin comes into contact with the engaging portion and receives a radial load, this radial direction There is an inconvenience that the pin tilts due to the load.
For this reason, special consideration is required when adopting a configuration in which a pin is engaged, such as a pin and ring coupling, as the rotation prevention mechanism.

  Further, as shown in Patent Document 1, in a compressor in which an electric motor is fixed in a housing, the housing may be deformed to expand when the electric motor is fixed to the housing. It is also preferable to eliminate as much as possible the influence of the deformation on the fixed portion of the pin in order to improve the pin assembly accuracy (to avoid the tilting of the pin).

  The present invention has been made in view of such circumstances, and when adopting a configuration in which a pin is engaged as an anti-rotation mechanism of the orbiting scroll, the assembly accuracy of the pin is increased to improve the performance and reliability of the compressor. The main object is to provide an electric scroll compressor that can be improved.

  To achieve the above object, an electric scroll compressor according to the present invention includes a housing member, a fixed scroll that is housed in the housing member and has a substrate and a spiral wall, and an orbiting scroll that has a substrate and a spiral wall. Are housed in the housing member, a compression mechanism in which a compression chamber is formed by meshing with each other, a drive shaft for revolving the orbiting scroll, a rotation preventing mechanism for preventing rotation of the orbiting scroll, An electric scroll compressor including an electric motor for rotating the drive shaft, wherein the housing member supports a motor fixing portion to which the electric motor is fixed, and an axial load of the swing scroll, An end plate that rotatably supports the drive shaft is integrally formed, and the anti-rotation mechanism is disposed on the front of the swing scroll and the substrate. An electric scroll compressor including a plurality of pins disposed in a circumferential direction between the end plate and a plurality of cylindrical recesses engaged with the pins, wherein the cylindrical recess is the swing scroll. And the pins are fixed to the end plate.

  Therefore, by fixing the pin of the anti-rotation mechanism to the end plate of the housing member, which is more rigid than the orbiting scroll, deformation of the fixed part of the pin when the pin is fixed by press-fitting the pin or the radial load acting on the pin As a result, deformation of the fixed portion of the pin due to is reduced, and the pin assembly accuracy can be increased. Further, since the end plate is integrated with the motor fixing portion, errors due to individual component accuracy and end plate assembly errors are eliminated.

The end plate may be formed with a hole radially outward from a portion where the pin is fixed.
By forming such a hole, a hole is disposed between the motor fixing portion of the housing member and the portion where the pin is press-fitted and fixed, so that the motor by press-fitting or shrink-fitting (tight-fitting) the electric motor. It is possible to prevent the deformation of the fixing portion from affecting the fixing position of the pin of the end plate, and it is possible to prevent the pin assembly accuracy from being lowered (the tilting of the pin can be avoided).

  Here, you may form the said hole in a long hole long in the circumferential direction of an end plate. By setting it as such a structure, it becomes difficult to transmit a deformation | transformation of a motor fixing | fixed part by an end plate.

  Further, the hole may be constituted by a fluid passage through which a fluid to be compressed that is compressed in the compression chamber flows. Thus, by making the hole a passage for the fluid to be compressed, it is not necessary to form a hole for preventing deformation separately from the hole of the fluid passage.

Furthermore, a rib extending in the radial direction may be formed on the end plate, and the pin may be fixed to a portion where the rib is formed.
In this way, by fixing the pin to the portion of the end plate where the rib is formed, the pin is fixed to a portion having higher rigidity, and it becomes possible to further suppress deformation of the end plate.

Based on the above configuration, a positioning pin for positioning the fixed scroll with respect to the end plate is provided on the end plate, and the positioning pin is provided on a virtual circle including each hole. Good.
From the viewpoint of accurately positioning the end plate and the fixed scroll by the positioning pin, it is preferable to provide the pin at a position as far as possible from the axis center. On the other hand, the influence (deformation) due to the motor press-fitting (interference fitting) of the end plate is suppressed on the virtual circle provided with the hole or on the inner side thereof. Therefore, the most suitable positioning pin location for achieving both is on a virtual circle including a hole. If a positioning pin is provided at this position, tilting of the positioning pin can be avoided and positioning accuracy can be improved. It becomes possible.

  As described above, according to the present invention, the motor press-fitting portion into which the electric motor is press-fitted and the end plate that supports the axial load of the orbiting scroll and that rotatably supports the drive shaft are integrally formed. A rotation prevention mechanism, and a plurality of pins disposed in the circumferential direction between the substrate and the end plate of the orbiting scroll, and a plurality of cylindrical recesses engaged with the pins, or this It is composed of a ring member housed in a cylindrical recess, and the cylindrical recess is formed on the substrate of the orbiting scroll and the pin is fixed to the end plate, so the motor fixing part of the housing and the end plate are integrated. In the configuration in which the housing member is provided and the pin is engaged as an anti-rotation mechanism, the pin assembly accuracy can be improved (the pin can be tilted). It is possible to avoid), it is possible to improve the performance and reliability of the compressor.

  In addition, by forming a hole in the end plate radially outward from the portion where the pin is press-fitted and fixed, deformation of the motor fixing part when fixing the electric motor affects the pin fixing position of the end plate. Therefore, it is possible to avoid a decrease in pin assembly accuracy (avoid tilting of the pin) and improve the performance and reliability of the compressor.

  Furthermore, by fixing the pin to the portion where the rib extending in the radial direction of the end plate is formed, the pin can be fixed to a portion having higher rigidity, and the deformation of the end plate is further suppressed. Is possible.

  In addition, by providing positioning pins for positioning the fixed scroll on virtual circles including the holes of the end plates, it is possible to improve positioning accuracy while avoiding tilting of the positioning pins.

FIG. 1 is a cross-sectional view showing an electric scroll compressor according to the present invention. 2A and 2B are diagrams showing the orbiting scroll, in which FIG. 2A is a rear view thereof, and FIG. 2B is a cross-sectional view taken along line AA in FIG. 3A and 3B are views showing a housing member in which an end plate is integrated. FIG. 3A is a view as seen in the axial direction from the motor fixing portion side, and FIG. 3B is a view as seen in the axial direction from the compression mechanism side. is there. FIG. 4 is a side sectional view showing a housing member in which an end plate is integrated. FIG. 5 is a perspective view with a part cut away showing a housing member integrated with an end plate.

Hereinafter, an electric scroll compressor according to the present invention will be described with reference to the drawings.
In FIG. 1, an electric scroll compressor 1 is an electric compressor suitable for a refrigeration cycle using refrigerant as a working fluid, and a compression mechanism 3 is arranged on the right side in the figure in a housing 2 made of an aluminum alloy. In addition, an electric motor 4 for driving the compression mechanism 3 is disposed on the left side in the drawing. In FIG. 1, the left side in the drawing is the front side of the compressor 1, and the right side in the drawing is the rear side of the compressor.

  The housing 2 houses a compression mechanism housing member 5 that houses the compression mechanism 3, a motor housing housing member 6 that houses the electric motor 4 that drives the compression mechanism 3, and an inverter device (not shown) that drives and controls the electric motor 4. And an inverter housing housing member 7 that is positioned by positioning pins (not shown) and fastened in the axial direction by fastening bolts 8 and 9.

  The compression mechanism housing member 5 is formed in a bottomed cylindrical shape that fixes a fixed scroll of a compression mechanism, which will be described later, and is open on the side facing the motor housing housing member. The motor housing housing member 6 is provided on the side facing the cylindrical motor fixing portion 6a to which the electric motor is fixed and the compression mechanism housing housing member 5, and the axial load of the swing scroll 22 of the compression mechanism 3 to be described later. And an end plate 6b provided integrally with the shaft support portion 10 are integrally formed. Further, the inverter housing member 7 is integrally provided with an inverter housing portion 7 a formed in a cylindrical shape and an end plate 7 b formed integrally with a shaft support portion 11 on the side facing the motor housing housing member 6. .

A drive shaft 14 is rotatably supported via bearings 12 and 13 on the shaft support portion 10 of the end plate 6b of the motor housing housing member 6 and the shaft support portion 11 of the end plate 7b of the inverter housing housing member 7. . By the end plates 6b and 7b formed in the motor housing housing member 6 and the inverter housing housing member 7, the inside of the housing 2 houses the compression mechanism housing portion 15a for housing the compression mechanism 3 from the rear, and the electric motor 4. It is partitioned into a motor accommodating portion 15b and an inverter accommodating portion 15c that accommodates the inverter device.
In this example, the inverter accommodating portion 15c is defined by fixing the lid 16 to the inverter accommodating housing member 7 with a bolt or the like (not shown).

  The compression mechanism 3 is of a scroll type having a fixed scroll 21 and an orbiting scroll 22 disposed so as to face the fixed scroll 21. The fixed scroll 21 is arranged in the axial direction with respect to the housing 2 (compression mechanism housing member 5). While the movement is allowed, the movement in the radial direction is restricted by a positioning pin 23 to be described later. The disk-shaped substrate 21a is provided over the entire periphery along the outer edge of the substrate 21a and faces forward. A cylindrical outer peripheral wall 21b standing upright and a spiral spiral wall 21c extending forward from the substrate 21a inside the outer peripheral wall 21b.

  Further, as shown in FIG. 2, the orbiting scroll 22 includes a disc-shaped substrate 22a and a spiral-shaped spiral wall 22c erected rearward from the substrate 22a. An eccentric shaft 25 provided at a rear end portion of the drive shaft 14 and provided eccentrically with respect to the shaft center of the drive shaft 14 is supported via a radial bearing 27 in a fitting recess 24 provided in the center of the back surface of the drive shaft 14. The revolving motion is provided around the axis of the drive shaft 14.

The fixed scroll 21 and the orbiting scroll 22 mesh with the respective spiral walls 21c and 22c, and are surrounded by the substrate 21a and the spiral wall 21c of the fixed scroll 21, and the substrate 22a and the spiral wall 22c of the orbiting scroll 22. A compression chamber 26 is defined by the space.
Further, the position of the fixed scroll 21 and the end plate 6 b of the motor housing housing member 6 in the radial direction is defined by positioning pins 23.

  In this example, the fixed scroll 21 is directly assembled to the end plate 6b of the motor housing member 6, and the axial load of the orbiting scroll 22 is directly supported by the end plate 6b. A thin plate-shaped annular thrust trace is interposed between the outer peripheral wall 21b of the fixed scroll 21 and the end plate 6b, and the fixed scroll 21 and the end plate 6b are abutted with each other via the thrust trace and swing. The axial load of the scroll 22 may also be supported by the end plate via this thrust trace.

  The shaft support portion 10 formed integrally with the end plate 6 b of the motor housing member 6 has a through hole 10 a in the center, and a bearing housing portion 31 in which the bearing 12 is housed from the front side farthest from the swing scroll 22. And the weight accommodating part 33 which accommodates the balance weight 32 which rotates integrally with the drive shaft 14 is formed.

  A suction chamber 35 that sucks a refrigerant introduced from a suction port 38 (described later) through a suction path 45 between the outer peripheral wall 21b of the fixed scroll 21 and the outermost peripheral portion of the spiral wall 22c of the swing scroll 22 described above. In addition, a discharge chamber 37 in which the refrigerant gas compressed in the compression chamber 26 is discharged through a discharge hole 36 formed substantially at the center of the fixed scroll 21 is provided behind the fixed scroll 21 in the housing. It is defined between the rear end wall of the compression mechanism housing member 5. The refrigerant gas discharged into the discharge chamber 37 is pumped to the external refrigerant circuit through the discharge port 39.

  A stator 41 and a rotor 42 constituting the electric motor 4 are accommodated in a motor fixing portion 6a formed in a front portion of the motor accommodating housing member 6 with respect to the end plate 6b. The stator 41 is composed of a cylindrical iron core and a coil wound around the core, and is fixed to the inner surface of the housing 2 (motor housing housing member 6). Further, the drive shaft 14 is fixed with a rotor 42 made of a magnet rotatably accommodated inside the stator 41, and the rotor 42 is rotated by a rotating magnetic force formed by the stator 41. It is designed to rotate.

  The inverter device housed in the inverter housing housing member 7 is electrically connected to the stator 41 via a terminal (airtight terminal) attached to a through hole (not shown) formed in the end plate 7 b and connected to the electric motor 4. On the other hand, power is supplied from the inverter device.

  A suction port 38 for sucking refrigerant gas is formed in the motor housing portion 15b on the side surface of the housing 2 (motor housing housing member 6), and a gap between the stator 41 and the housing 2 (motor housing housing member 6). In addition, the refrigerant flowing from the suction port 38 into the motor accommodating portion 15b through the hole 63 formed in the end plate 6b and a gap formed between the fixed scroll 21 and the housing 2 is supplied to the suction chamber 35. A leading suction path 45 is configured.

  As shown in FIGS. 3 to 5, on the inner peripheral surface of the motor housing member 6, a stator contact portion 61 that contacts the stator 41 and a stator non-contact portion 62 that does not contact the stator 41 alternately in the circumferential direction. Is formed. The stator contact portion 61 and the stator non-contact portion 62 are formed so as to extend in the axial direction, and the outer periphery of the stator 41 is tightly fitted into the stator contact portion 61 by press-fitting or shrink fitting, so that the stator (housing motor) It is fixed to the housing housing member 6). Therefore, the gap between the stator 41 and the housing 2 (the motor housing housing member 6) constituting a part of the suction path 45 is due to the gap between the inner wall of the stator non-contact portion 62 and the outer peripheral portion of the stator 41. Is formed.

  In this example, the stator non-contact portion 62 and the stator contact portion 61 are formed at six locations in the circumferential direction at an interval of about 60 degrees as the central angle. In this example, the width of the stator contact portion 61 in the circumferential direction is formed. Is formed to be relatively smaller than the circumferential width of the stator non-contact portion 62 (with the circumferential angle, the width of the stator contact portion 61 is about 20 degrees and the width of the stator non-contact portion 62 is about 40 degrees. Have been).

  Further, the end plate 6b of the motor housing member 6 is formed with a hole 63 that communicates the motor housing portion 15b and the compression mechanism housing portion 15a, and flows into the motor housing portion 15b from the suction port 38 through the hole 63. The cooled refrigerant is guided to the suction chamber 35.

The hole 63 is formed radially outside the pin 51 of the rotation prevention mechanism, which will be described later, and is substantially in the position corresponding to the axial direction of the stator contact portion 61, that is, substantially in the circumferential direction with the stator contact portion 61. A plurality of circumferentially formed positions are formed at overlapping positions (positions having substantially the same phase), and in this example, they are formed as elongated holes extending in the circumferential direction, and all the remaining stator contact parts except for one stator contact part It is formed in the position (5 places) corresponding to.
Reference numeral 64 denotes a bolt hole through which the bolt 9 is inserted.

  Further, in this example, a reinforcing rib 65 that reinforces the end plate 6b is integrally extended in the radial direction from the shaft support portion 10 to the inner peripheral surface of the motor fixing portion 6a on the surface of the end plate 6b on the motor housing portion side. Has been. The reinforcing rib 65 is located at a position corresponding to the axial direction of the stator non-contact portion 62, that is, at a position that substantially overlaps the stator non-contact portion 62 in the circumferential direction (at a position that is substantially in phase), and substantially the same in the circumferential direction. In this example, six are provided in the circumferential direction according to the number of pins 51 to be described later. Therefore, the reinforcing rib 65 is formed so as not to overlap the stator contact portion 61 in the circumferential direction (so as not to have the same phase), and stress due to deformation of the stator contact portion 61 is not directly transmitted. .

  As shown in FIG. 3B, the positioning pins 23 for positioning the fixed scroll 21 with respect to the end plate 6b are provided on the virtual circle α including the respective holes 63, and are formed on the end plate 6b. It is fixed by press-fitting into the pin mounting hole 55.

In the above configuration, when the rotor 42 rotates and the drive shaft 14 rotates, the orbiting scroll 22 is driven to revolve by being driven via the eccentric shaft 25 in the compression mechanism 3.
As a result, the refrigerant sucked into the motor accommodating portion 15b from the suction port 38 passes through the gap between the stator non-contact portion 62 and the stator 41 around the rotor and the gap of the coil of the stator 41, and the hole 63 of the end plate 6b. Through the suction chamber 35.
The compression chamber 26 of the compression mechanism moves while gradually reducing the volume from the outer peripheral side of the scroll walls 21c, 22c of both scrolls to the center side due to the revolving motion of the orbiting scroll 22, so that the compression chamber 26 is moved from the suction chamber 35 to the compression chamber 26. The refrigerant gas sucked in is compressed, and the compressed refrigerant gas is discharged into the discharge chamber 37 through the discharge hole 36 formed in the substrate 21 a of the fixed scroll 21, and the external refrigerant circuit through the discharge port 39. Is sent to.

  By the way, in the electric scroll compressor 1 described above, a rotation force is generated in the swing scroll 22 as the drive shaft 14 rotates, so that the rotation of the swing scroll 22 is restricted around the axis of the drive shaft 14. It is necessary to revolve. For this reason, in the present compressor, an anti-rotation mechanism for engaging the pin 51 is provided between the substrate 22a of the orbiting scroll 22 and the end plate 6b of the motor housing housing member 6.

  In this example, as an anti-rotation mechanism for engaging the pin 51, for example, a pin & ring coupling is adopted, and a plurality of pins 51 arranged in the circumferential direction and these pins 51 are engaged. The plurality of ring members 52 and the plurality of cylindrical recesses 53 that accommodate the respective ring members 52 are configured.

  As shown in FIGS. 1 and 2, the cylindrical recess 53 is formed by forming a recess having a circular cross section on the back surface of the substrate 22 a of the orbiting scroll 22. It is formed at equal intervals around the joint recess 24 (in this example, at intervals of 60 degrees). The ring member 52 has an annular shape made of iron and has an outer diameter smaller than the inner diameter of the cylindrical recess 53 so that the ring member 52 is loosely fitted to the cylindrical recess 53, and the axial thickness is on the cylinder. The recess 53 is formed to be substantially equal to or smaller than the axial width.

  The pin 51 is formed in the shape of an iron column and has an outer diameter smaller than the inner diameter of the ring member 52, and a cylindrical recess 53 is formed around the weight accommodating portion 33 of the end plate 6 b of the motor accommodating housing member 6. It is fixed at regular intervals according to the position. In this example, the pin 51 is fixed by being press-fitted into a pin mounting hole 54 formed in the end plate 6b, and is fixed to the back surface of the portion of the end plate 6b where the reinforcing rib 65 is formed.

  Therefore, the orbiting scroll 22 generates a rotating force by the rotation of the drive shaft 14, but the pin 51 fixed to the end plate 6 b abuts on the inner peripheral surface of the ring member 52 and is cylindrical through the ring member. Since the movement is restricted by being engaged with the recess 53, the orbiting scroll 22 is allowed to revolve only with respect to the axis of the drive shaft 14 while its rotation is restricted.

  Further, in the above-described configuration in which the pin & ring coupling is used as an anti-rotation mechanism, since the cylindrical recess is formed on the substrate of the orbiting scroll, the weight of the orbiting scroll 22 as the movable member can be reduced. Thus, the driveability of the orbiting scroll 22 can be improved. Moreover, since the pin 51 is press-fitted and fixed to the end plate 6b of the motor housing member 6 as a fixing member having a rigidity higher than that of the substrate 22a of the orbiting scroll 22, the deformation of the end plate 6b when the pin 51 is press-fitted. Even when the pin 51 engages with the cylindrical recess 53 via the ring member 52 and receives a radial load, the portion where the pin 51 is press-fitted may be deformed by the radial load. As a result, the assembly accuracy of the pin 51 can be improved (the tilt of the pin can be avoided).

  Further, in the above-described configuration, since the hole 63 is formed radially outside the fixed portion of the pin 51 of the end plate 6b, the stator 41 of the electric motor is connected to the motor fixing portion 6a (stator of the motor housing housing member 6). Even when the motor fixing portion 6a is pushed and spread when fitted into the contact portion 61), the deformation of the end plate 6b is suppressed by the hole 63, and the deformation of the pin 51 to the fixing portion can be avoided. . In particular, as in the present embodiment, when the hole 63 formed in the end plate 6b is formed as a long hole extending in the circumferential direction, and is formed at a position corresponding to the axial direction of the stator contact portion 61. Further, it becomes possible to reliably prevent the transmission of stress from the stator contact portion 61 where the deformation of the motor fixing portion 6a is most remarkable by the hole, and the deformation of the end plate 6b (the deformation of the pin fixing portion) is more effective. Can be prevented.

Further, in the above-described configuration, the pin 51 is fixed to a portion where the reinforcing rib 65 provided on the end plate 6b is formed. Therefore, the pin 51 is fixed to a portion having higher rigidity in the end plate 6b. Accordingly, it is possible to more reliably avoid deformation of the portion where the pin 51 is press-fitted when the pin 51 is press-fitted and fixed, or when receiving a radial load.
Further, since the reinforcing rib 65 is formed at a position corresponding to the axial direction of the stator non-contact portion 62, the stress accompanying the deformation of the stator contact portion 61 is transmitted to the end plate 6b via the reinforcing rib 65. Can be avoided.

  Furthermore, in the above-described configuration, the positioning pins 23 for positioning the end plate 6b and the fixed scroll 21 are provided on virtual circles including the respective holes 63. A request to ensure the positioning accuracy between the end plate 6b and the fixed scroll 21 by providing them as far as possible and the influence (deformation) on the end plate 6b due to the press-fitting (tightening) of the electric motor 4 of the motor housing member 6 Therefore, the assembly accuracy of the positioning pin 23 can be ensured while ensuring the positioning accuracy of the fixed scroll 21.

  In the configuration example described above, the example in which the cylindrical recess 53 is engaged with the pin 51 via the ring member 52 is shown. However, in order to ensure the rotation prevention function, the ring member 52 may be omitted. In such a case, the cylindrical recess 53 may be directly engaged with the pin 52. Even in such a configuration, it is possible to obtain the same operational effects as in the configuration example.

  In addition, an example in which the pin 51 is fixed by being press-fitted into the pin mounting hole 54 with respect to the end plate 6b has been shown, but the pin 51 is screwed into the pin mounting hole 54 to be fixed. A similar configuration may be adopted when there is a risk of deformation of the pin fixing portion when fixing.

DESCRIPTION OF SYMBOLS 1 Electric scroll compressor 2 Housing 3 Compression mechanism 4 Electric motor 6 Motor accommodating housing member 6a Motor fixed part 6b End plate 14 Drive shaft 21 Fixed scroll 21a Substrate 21c Swirl wall 22 Swing scroll 22a Substrate 22c Swirl wall 23 Positioning pin 26 Compression Chamber 51 Pin 52 Ring member 53 Cylindrical recess 61 Stator contact portion 62 Stator non-contact portion 63 Hole 65 Reinforcing rib

Claims (7)

A housing member;
A compression mechanism in which a compression chamber is formed by meshing a stationary scroll housed in the housing member and having a substrate and a spiral wall, and an orbiting scroll having a substrate and a spiral wall;
A drive shaft for revolving the swing scroll;
A rotation prevention mechanism for preventing rotation of the swing scroll;
An electric scroll compressor including an electric motor housed in the housing member and configured to rotate the drive shaft,
The housing member is integrally formed with a motor fixing portion to which the electric motor is fixed and an end plate that supports the axial load of the orbiting scroll and that rotatably supports the drive shaft,
The rotation prevention mechanism includes an electric motor including a plurality of pins disposed in a circumferential direction between the substrate and the end plate of the orbiting scroll and a plurality of cylindrical recesses engaged with the pins. In scroll compressor,
The cylindrical recess is formed on the substrate of the orbiting scroll,
The electric scroll compressor, wherein the pin is fixed to the end plate.   The electric scroll compressor according to claim 1, wherein the end plate has a hole formed radially outward from a portion where the pin is fixed.   The electric scroll compressor according to claim 2, wherein the hole is a long hole extending in a circumferential direction of the end plate.   4. The electric scroll compressor according to claim 2, wherein the hole is a fluid passage through which a fluid to be compressed that is compressed in the compression chamber flows.   The electric scroll compression according to any one of claims 1 to 4, wherein a rib extending in a radial direction is formed on the end plate, and the pin is fixed to a portion where the rib is formed. Machine.   A ring member is accommodated in the cylindrical recess formed in the substrate of the rocking scroll, and the cylindrical recess is engaged with the pin via the ring member. Item 6. The electric scroll compressor according to any one of Items 1 to 5.   The positioning plate for positioning the fixed scroll with respect to the end plate is disposed on the end plate, and the positioning pin is provided on a virtual circle including the holes. The electric scroll compressor in any one of thru | or 6.

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