WO2016104336A1 - Electrically driven scroll compressor - Google Patents

Electrically driven scroll compressor Download PDF

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Publication number
WO2016104336A1
WO2016104336A1 PCT/JP2015/085398 JP2015085398W WO2016104336A1 WO 2016104336 A1 WO2016104336 A1 WO 2016104336A1 JP 2015085398 W JP2015085398 W JP 2015085398W WO 2016104336 A1 WO2016104336 A1 WO 2016104336A1
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WO
WIPO (PCT)
Prior art keywords
motor
end plate
scroll
housing member
electric
Prior art date
Application number
PCT/JP2015/085398
Other languages
French (fr)
Japanese (ja)
Inventor
裕展 出口
Original Assignee
株式会社ヴァレオジャパン
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社ヴァレオジャパン filed Critical 株式会社ヴァレオジャパン
Priority to EP15872905.3A priority Critical patent/EP3239526B1/en
Priority to CN201580068389.6A priority patent/CN107002676B/en
Priority to JP2016566179A priority patent/JP6587636B2/en
Publication of WO2016104336A1 publication Critical patent/WO2016104336A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/06—Silencing
    • F04C29/063—Sound absorbing materials

Definitions

  • the present invention relates to an electric scroll compressor used for a refrigeration cycle of a vehicle air conditioner.
  • an electric scroll compressor has a known configuration shown in Patent Document 1 below.
  • This conventional electric scroll compressor has a discharge port, a discharge housing that houses a compression portion (compression mechanism) configured by disposing a fixed scroll and a movable scroll, a suction housing having a suction port, and a discharge An intermediate housing that is interposed between the housing and the suction housing and accommodates the electric motor together with the suction housing.
  • the intermediate housing is formed integrally with 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 a bearing. And have.
  • a compression mechanism used in this conventional electric scroll compressor is known per se, and a fixed scroll having a substrate and a spiral wall standing upright from the substrate, and a substrate and the substrate disposed opposite to the fixed scroll. And a pair of scrolls, each of which is combined with each other, and an eccentric provided on a drive shaft that is driven to rotate by an electric motor housed in the housing. By engaging with the shaft and turning (revolving motion), the compression chamber formed between the spiral walls of both scrolls is moved to the center while reducing the volume, and the fluid to be compressed is compressed.
  • a rotation prevention mechanism for preventing the rotation of the orbiting scroll is provided.
  • This anti-rotation mechanism Oldham coupling, pin & ring coupling, ball coupling or the like is used between the substrate (bottom plate) of the swing scroll (movable scroll) and the end plate of the intermediate housing.
  • the orbiting scroll can be swung while being supported by the end plate of the intermediate housing via the rotation prevention mechanism, or can be swung while being directly supported by the end plate of the intermediate housing. ing.
  • the present invention can suppress the deformation of the end plate, improve the support surface accuracy of the orbiting scroll, enable the orbiting scroll to turn with high accuracy, and improve the performance and reliability of the compressor. It is an object to provide an electric scroll compressor.
  • the present invention includes a compression mechanism housing member 5 in which a compression mechanism 3 formed by combining a fixed scroll 11 and a swing scroll 21 is housed, and a motor housing housing member in which an electric motor 4 that drives the compression mechanism 3 is housed. 6 and an inverter accommodating housing member 7 in which an inverter device for driving and controlling the electric motor 4 is accommodated.
  • the motor housing housing member 6 includes a cylindrical motor fixing portion 12 to which the stator 16 of the electric motor 4 is fixed by interference fit, and an end surface on the side of the orbiting scroll that serves as a support surface for the orbiting scroll 21. And an end plate 13 having a low rigidity portion 14 connecting the motor fixing portion 12 and the end plate 13.
  • the low-rigidity portion 14 is formed with lower rigidity than the motor fixing portion 12 and the end plate 13.
  • the electric scroll compressor according to the present invention when the stator of the electric motor is fixed to the motor fixing portion of the motor housing housing member with an interference fit, and the motor fixing portion is expanded and deformed by the stator, the motor fixing portion and the end plate Also, the low-rigidity low-rigidity part is elastically deformed along with the diameter expansion deformation of the motor fixing part. The stress is smaller than when no low rigidity portion is provided.
  • the electric scroll compressor according to the present invention can suppress the deformation of the end plate due to the diameter expansion deformation of the motor fixing portion, and can improve the accuracy of the support surface that supports the turning motion of the orbiting scroll. Therefore, the swinging scroll can be turned with high accuracy, and the performance and reliability of the compressor can be improved.
  • FIG. 2A is a rear view of the orbiting scroll
  • FIG. 2B is a cross-sectional view of the orbiting scroll cut along the line A1-A1 of FIG. 2A
  • FIG. 3A is a view showing a motor housing housing member integrated with an end plate
  • FIG. 3A is a view of the end plate viewed from the motor fixing portion side in the axial direction
  • FIG. 3B is a view showing the end plate on the compressor side. It is the figure seen from the axial direction.
  • FIG. 2 is a cross-sectional view showing a motor housing housing member cut along line A2-A2 of FIG.
  • An electric scroll compressor 1 shown in FIG. 1 is an electric compressor suitable for a refrigeration cycle using a refrigerant as a working fluid.
  • a compression mechanism 3 is disposed on the right side of the housing 2 made of an aluminum alloy in the drawing, and an electric motor 4 that drives the compression mechanism 3 is disposed in the center of the housing 2.
  • An inverter device (not shown) is disposed on the left side of the housing 2 in the drawing. In FIG. 1, the left side in the figure is the front of the compressor, and the right side in the figure is the rear of the compressor.
  • the housing 2 includes a compression mechanism housing member 5 in which the compression mechanism 3 is housed, a motor housing housing member 6 in which the electric motor 4 that drives the compression mechanism 3 is housed, and an inverter device (not shown) that drives and controls the electric motor 4. And an inverter housing member 7 for housing the housing.
  • the adjacent compression mechanism housing member 5 and motor housing member 6 are positioned by positioning pins (not shown) and fixed in the axial direction (X-axis direction in FIG. 1) by fastening bolts 8.
  • Adjacent motor housing housing member 6 and inverter housing housing member 7 are positioned by positioning pins (not shown) and fixed in the axial direction by fastening bolts 10.
  • the compression mechanism housing member 5 accommodates a fixed scroll 11 of the compression mechanism 3 to be described later, and has a bottomed cylindrical shape with the side facing the motor housing housing member 6 open.
  • the motor housing housing member 6 includes a cylindrical motor fixing portion 12 to which the electric motor 4 is fixed, an end plate 13 located on the side facing the compression mechanism housing housing member 5, a motor fixing portion 12 and an end plate 13. And a low-rigidity portion 14 that connects between the axial one end side of the motor fixing portion 12 and the radially outer end side of the end plate 13.
  • the motor fixing portion 12, the low rigidity portion 14, and the end plate 13 are integrally formed, and the low rigidity portion 14 is formed to have a lower rigidity than the motor fixing portion 12 and the end plate 13. .
  • the low rigidity portion 14 is formed over the entire circumference in the circumferential direction of the motor housing member 6, and a constricted portion 15 formed by denting the space between the motor fixing portion 12 and the end plate 13 inward in the radial direction.
  • the low-rigidity portion 14 is fixed when the stator 16 of the electric motor 4 is fixed to the motor fixing portion 12 with an interference fit (press-fit, shrink fitting, etc.), and the motor fixing portion 12 is deformed to expand its diameter.
  • the elastic deformation of the motor fixing portion 12 is caused by the deformation of the motor fixing portion 12, the deformation of the motor fixing portion 12 is absorbed, and the deformation of the end plate 13 due to the expansion of the diameter of the motor fixing portion 12 is suppressed. .
  • the bolt housing portion 17 is formed in the low rigidity portion 14 so as to bulge outward in the radial direction.
  • the constricted portion 15 is radially inward so that the recess amount d is about 0.05 D from the outer surface of the motor fixing portion 12.
  • the thickness of the low-rigidity portion 14 is t, the dent amount d with respect to the outer surface of the motor fixing portion 12 is recessed inward in the radial direction so as to be t / 2 or more. Yes.
  • the constricted portion 15 is not limited to such an example of the dent amount, and an optimum dent amount is determined in consideration of the diameter expansion deformation amount of the motor fixing portion 12 and the like.
  • the end plate 13 is integrally formed with a shaft support portion 20 that supports one end side of the drive shaft 18, and supports the axial load of the swing scroll 21 of the compression mechanism 3, which will be described later, on the end surface 22 on the swing scroll side. Can be done.
  • the inverter accommodating housing member 7 is integrally formed with an inverter accommodating cylindrical portion 23 formed in a cylindrical shape and an end plate 24 positioned on the side facing the motor accommodating housing member 6.
  • the end plate 24 is integrally formed with a shaft support 25 that supports the other end of the drive shaft 18.
  • a support shaft 20 of the end plate 13 of the motor housing housing member 6 is supported via a bearing 26 so that one end side of the drive shaft 18 can rotate. Further, the other end side of the drive shaft 18 is supported by the shaft support portion 25 of the end plate 24 of the inverter housing member 7 via a bearing 27 so as to be rotatable.
  • the interior of the housing 2 includes a compression mechanism accommodating portion 28 for accommodating the compression mechanism 3 and a motor accommodating portion for accommodating the electric motor 4 by the end plate 13 of the motor accommodating housing member 6 and the end plate 24 of the inverter accommodating housing member 7.
  • 30 and an inverter accommodating portion 31 that accommodates the inverter device are partitioned in order from the rear side.
  • the inverter accommodating portion 31 is closed by fixing the lid 32 to the opening of 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 11 and an orbiting scroll 21 disposed opposite thereto.
  • the fixed scroll 11 is allowed to move in the radial direction with respect to the housing 2 (the compression mechanism housing member 5) while being allowed to move in the axial direction by a positioning pin 33 described later.
  • the fixed scroll 11 includes a disk-shaped substrate 11a, a cylindrical outer peripheral wall 11b which is provided over the entire periphery along the outer edge of the substrate 11a and is erected forward, and an outer periphery thereof.
  • a spiral spiral wall 11c extending forward from the substrate 11a on the inner side of the wall 11b.
  • the orbiting scroll 21 is composed of a disc-shaped substrate 21a and a spiral-shaped spiral wall 21c erected rearward from the substrate 21a. ing.
  • a radial bearing 35 is accommodated in a fitting recess 34 provided in the center of the back surface of the substrate 21 a, and an eccentric shaft 36 formed at the rear end portion of the drive shaft 18 via the radial bearing 35. It is supported by.
  • the orbiting scroll 21 can revolve around the axis of the drive shaft 18 in accordance with the amount of eccentricity between the axis of the drive shaft 18 and the axis of the eccentric shaft 36.
  • the fixed scroll 11 and the orbiting scroll 21 mesh with the spiral walls 11c and 21c of each other, and the space surrounded by the substrate 11a and the spiral wall 11c of the fixed scroll 11 and the substrate 21a and the spiral wall 21c of the orbiting scroll 21.
  • a compression chamber 37 is formed.
  • the fixed scroll 11 and the end plate 13 of the motor housing housing member 6 are positioned in the radial direction by positioning pins 33.
  • the fixed scroll 11 is directly assembled to the end plate 13 of the motor housing housing member 6, and the axial load of the orbiting scroll 21 is the end surface on the orbiting scroll side of the end plate 13.
  • the present invention is not limited to this, and a thin plate-like annular thrust trace (not shown) is interposed between the outer peripheral wall 11b of the fixed scroll 11 and the end plate 13, The fixed scroll 11 and the end plate 13 may be abutted via a thrust trace, and the axial load of the orbiting scroll 21 may be supported by the end plate 13 via the thrust trace.
  • the shaft support portion 20 formed integrally with the end plate 13 of the motor housing housing member 6 includes a weight housing portion 38 that is an annular recess that opens to the compressor housing portion 28 side, and an annular recess that opens to the motor housing portion 30 side.
  • a bearing housing portion 40, and a through hole 41 that penetrates the weight housing portion 38 and the bearing housing portion 40 along the drive shaft 18 are formed.
  • the weight accommodating portion 38 accommodates a balance weight 42 that rotates integrally with the drive shaft 18.
  • the bearing accommodating portion 40 accommodates a bearing 26 that rotatably supports one end side of the drive shaft 18.
  • the drive shaft 18 is accommodated in the through hole 41 with a sufficient gap.
  • a suction chamber 45 is formed between the outer peripheral wall 11b of the fixed scroll 11 and the outermost peripheral portion of the spiral wall 21c of the orbiting scroll 21 to suck in a refrigerant introduced from a suction port 43, which will be described later, via a suction passage 44.
  • a discharge chamber 47 is formed on the rear side of the fixed scroll 11 in the housing 2 and between the fixed scroll 11 and the rear end wall 46 of the compression mechanism housing member 5. In the discharge chamber 47, the refrigerant gas compressed in the compression chamber 37 is discharged through a discharge hole 48 formed in the approximate center of the fixed scroll 11. The refrigerant gas discharged into the discharge chamber 47 is pumped to the external refrigerant circuit via the discharge port 50.
  • the stator 16 and the rotor 51 constituting the electric motor 4 are accommodated in the motor fixing portion 12 formed in the front part of the motor accommodating housing member 6 from the end plate 13.
  • the stator 16 is composed of a cylindrical iron core and a coil wound around the iron core, and is fixed to the inner surface of the housing 2 (motor housing housing member 6).
  • the rotor 51 made of a magnet is fixed to the outer peripheral side of the drive shaft 18 and is rotatably accommodated inside the stator 16. The rotor 51 is rotated integrally with the drive shaft 18 by the rotating magnetic force formed by the stator 16.
  • the inverter device housed in the inverter housing member 7 is electrically connected to the stator 16 via a terminal (airtight terminal) attached to a through hole (not shown) formed in the end plate 24, and is connected to the electric motor 4. In contrast, power is supplied.
  • a suction port 43 for sucking refrigerant gas into the motor housing 30 is formed on the side surface of the housing 2 (motor housing member 6).
  • the refrigerant that has flowed into the motor housing portion 30 from the suction port 43 is guided to the suction chamber 45 via the suction path 44.
  • the suction path 44 is formed between the stator 16 and the housing 2 (motor housing housing member 6), the hole 52 formed in the end plate 13, and the fixed scroll 11 and the housing 2. It consists of gaps.
  • a stator contact portion 53 that contacts the stator 16 and a stator non-contact portion 54 that does not contact the stator 16 are alternately arranged on the inner peripheral surface of the motor housing member 6 in the circumferential direction. Is formed. And the outer peripheral part of the stator 16 is being fixed to the stator contact part 53 by interference fitting (press fitting, shrink fitting, etc.). Thereby, the stator 16 is fixed to the housing 2 (motor housing member 6). A gap between the stator 16 constituting a part of the suction path 44 and the housing 2 (the motor housing housing member 6) is formed by a gap between the inner wall of the stator non-contact portion 54 and the outer peripheral portion of the stator 16. Has been.
  • stator contact portion 53 and the stator non-contact portion 54 that form a pair are formed at six locations in the circumferential direction at an interval of about 60 degrees as a central angle.
  • the stator contact portion 53 is formed so that its circumferential width is relatively smaller than the circumferential width of the stator non-contact portion 54 (the stator contact portion 53 has a center angle of about 20 degrees, The width of the non-contact portion 54 is formed at a central angle of about 40 degrees).
  • the end plate 13 of the motor housing member 6 is formed with a hole 52 that allows the motor housing 30 and the compression mechanism housing 28 to communicate with each other.
  • the hole 52 guides the refrigerant flowing from the suction port 43 into the motor housing 30 to the suction chamber 45.
  • the hole 52 is formed in the end plate 13 so as to be positioned radially outside the pin 55 of the rotation prevention mechanism to be described later, and on the radially inner side of the five stator contact portions 53 and at five locations.
  • a plurality of stator contact portions 53 are formed so as to correspond to the five stator contact portions 53 at positions substantially overlapping with the stator contact portions 53 in the circumferential direction (positions having substantially the same phase).
  • the holes 52 are formed so as to correspond only to the five stator contact portions 53 of the six stator contact portions 53 and are formed as long holes extending in the circumferential direction of the end plate 13. Has been.
  • bolt holes 56 through which the shaft portion 10a of the fastening bolt 10 is inserted are formed.
  • the fastening bolt 10 in which the shaft portion 10 a is inserted into the bolt hole 56 is used for fixing the motor housing housing member 6 and the inverter housing housing member 7.
  • the shaft portion 10a of the fastening bolt 10 is engaged with a bolt housing portion 17 partially formed in the low-rigidity portion 14 with a gap.
  • the bolt housing portion 17 is formed at a location where the shaft portion 10a of the fastening bolt 10 of the low-rigidity portion 14 is inserted, and bulges outward in the radial direction of the constricted portion 15 of the low-rigidity portion 14 to tighten the fastening bolt 10.
  • the shaft portion 10a of the fastening bolt 10 is protected so that the shaft portion 10a of the fastening bolt 10 is not exposed to the outside air.
  • the bolt accommodating portions 17 are formed in the same number as the fastening bolts 10 and have a substantially arc shape in cross section, and enhance the rigidity of the low rigidity portion 14 in the torsional direction.
  • Reinforcing ribs 57 that reinforce the end plate 13 are integrally extended in a radial direction from the shaft support portion 20 to the inner peripheral surface of the low-rigidity portion 14 on the surface of the end plate 13 on the motor accommodating portion 30 side.
  • the reinforcing rib 57 is located at a position corresponding to the axial direction of the stator non-contact portion 54, that is, at a position that substantially overlaps the stator non-contact portion 54 in the circumferential direction (at a position that is substantially in phase), and substantially the same in the circumferential direction.
  • a plurality of intervals are formed (six locations are provided in the circumferential direction in accordance with the number of pins 55 described later). Therefore, the reinforcing rib 57 is formed so that the stator contact portion 53 does not overlap the circumferential position (so as not to have the same phase), and stress due to deformation of the stator contact portion 53 is not directly transmitted. .
  • the positioning pins 33 for positioning the fixed scroll 11 with respect to the end plate 13 are provided on the virtual circle 58 including the respective holes 52 and formed on the end plate 13. It is fixed by press-fitting into the pin mounting hole 60.
  • the compression chamber 37 of the compression mechanism 3 moves while gradually reducing the volume from the outer peripheral side of the spiral wall 11c of the fixed scroll 11 and the spiral wall 21c of the swing scroll 21 to the center side by the revolving motion of the swing scroll 21. .
  • the refrigerant gas sucked into the compression chamber 37 from the suction chamber 45 is compressed as the swinging scroll 21 revolves.
  • the compressed refrigerant gas is discharged into the discharge chamber 47 through the discharge hole 48 formed in the substrate 11 a of the fixed scroll 11, and is sent from the discharge chamber 47 to the external refrigerant circuit through the discharge port 50. .
  • the electric scroll compressor 1 since the rotation force is generated in the swing scroll 21 as the drive shaft 18 rotates, the swing scroll 21 is driven in a state where the rotation of the swing scroll 21 is restricted. It is necessary to revolve around the axis of the shaft 18. For this reason, the electric scroll compressor 1 according to the present embodiment is provided with a rotation prevention mechanism that engages the pin 55 between the substrate 21a of the swing scroll 21 and the end plate 13 of the motor housing housing member 6. Yes.
  • a pin & ring coupling is adopted as the rotation preventing mechanism, and a plurality of pins 55 arranged in the circumferential direction and a plurality of ring members 61 engaged with these pins 55, respectively. And a plurality of cylindrical recesses 62 for accommodating the ring member 61.
  • the cylindrical recess 62 is configured by forming a recess having a circular cross section on the back surface (surface facing the end plate 13) of the substrate 21 a of the orbiting scroll 21. Thus, they are formed at equal intervals (in this example, at intervals of 60 degrees) around the fitting recess 34 of the orbiting scroll 21.
  • the ring member 61 has an annular shape made of iron, has an outer diameter smaller than the inner diameter of the cylindrical recess 62, and is loosely fitted into the cylindrical recess 62.
  • the ring member 61 is formed such that the axial width is substantially equal to the axial width of the cylindrical recess 62 or smaller than the axial width of the cylindrical recess 62.
  • the pin 55 is formed in an iron column shape, is formed to have an outer diameter smaller than the inner diameter of the ring member 61, and faces the swing scroll 21 around the weight accommodating portion 38 of the end plate 13 of the motor accommodating housing member 6.
  • the rocking scroll side end face 22 is fixed at equal intervals according to the position of the cylindrical recess 62.
  • the pin 55 is fixed by being press-fitted into a pin mounting hole 63 formed in the end plate 13, and is fixed to the back surface of the portion of the end plate 13 where the reinforcing rib 57 is formed. .
  • the stator 16 of the electric motor 4 is fixed to the motor fixing portion 12 of the motor housing housing member 6 by interference fit, and the motor fixing portion 12 is expanded by the stator 16.
  • the low-rigidity portion 14 having a rigidity lower than that of the motor fixing portion 12 and the end plate 13 is elastically deformed along with the diameter expansion deformation of the motor fixing portion 12, and the diameter expansion deformation of the motor fixing portion 12 is low.
  • the electric scroll compressor 1 can suppress the deformation of the end plate 13 due to the diameter-enlarging deformation of the motor fixing portion 12 (the falling of the rocking scroll side end surface 22 and the like), and the rocking Since the support surface accuracy for supporting the turning motion of the scroll 21 can be improved, the swinging scroll 21 can be turned with high accuracy, and the performance and reliability of the compressor can be improved.
  • the electric scroll compressor 1 which concerns on this embodiment does the diameter expansion deformation of the motor fixing
  • the electric scroll compressor 1 includes a constricted portion 15 formed by the low-rigidity portion 14 being recessed radially inward between the motor fixing portion 12 and the end plate 13.
  • the length of the low-rigidity portion 14 on the cross-sectional view of FIG. 1 is longer than that when the constricted portion 15 is not provided, and the low-rigidity portion 14 easily deforms following the diameter expansion deformation of the motor fixing portion 12. It has become. Therefore, the electric scroll compressor 1 according to the present embodiment can reduce the stress generated in the connection portion between the low-rigidity portion 14 and the end plate 13 as compared with the case where the constricted portion 15 is not provided in the low-rigidity portion 14. The deformation of the end plate 13 due to the diameter expansion deformation of the fixing portion 12 can be further reduced.
  • a bolt housing portion 17 bulging radially outward is formed in a part of the constricted portion 15 of the low-rigidity portion 14, and the motor housing housing member 6 and the inverter housing are accommodated.
  • the shaft portion 10a of the fastening bolt 10 that fixes the housing member 7 is covered with the bolt housing portion 17, and the shaft portion 10a of the fastening bolt 10 is covered with the bolt housing portion 17 so that the shaft portion 10a of the fastening bolt 10 is not exposed to the outside air. Since it protects, the fall of durability resulting from corrosion etc. of the fastening bolt 10 can be prevented, and the torsional rigidity in the low rigidity portion 14 of the motor housing housing member 6 can be increased.
  • a pin & ring coupling is used as an anti-rotation mechanism, and the cylindrical recess 62 is formed in the substrate 21a of the orbiting scroll 21.
  • the weight of the orbiting scroll 21 can be reduced, and the driveability of the orbiting scroll 21 can be improved.
  • the pin 55 is press-fitted and fixed to the end plate 13 of the motor housing housing member 6 as a fixing member having higher rigidity than the substrate 21a of the swing scroll 21.
  • the electric scroll compressor 1 according to the present embodiment, together with the effect of improving the support surface accuracy of the end plate 13, enables the swing scroll 21 to turn with high accuracy, Reliability can be further improved
  • the pin 55 is fixed to the portion where the reinforcing rib 57 provided on the end plate 13 is formed. Therefore, the deformation of the portion where the pin 55 is press-fitted at the time of press-fitting and fixing the pin 55 or receiving a radial load can be avoided more reliably.
  • the positioning pin 33 for positioning the end plate 13 and the fixed scroll 11 is positioned away from the center of the shaft radially outward (a virtual circle 58 including a plurality of holes 52). Furthermore, since the positioning pin 33 is fixed to the end plate 13 whose deformation is suppressed by the function of the low-rigidity portion 14, the fixed scroll 11 is positioned to the end plate 13 with high accuracy. As a result, the electric scroll compressor 1 according to the present embodiment can combine the fixed scroll 11 and the orbiting scroll 21 with high precision, and in combination with the effects of the present embodiment, the performance of the compressor. And reliability can be further improved.
  • the electric scroll compressor 1 which concerns on this embodiment showed the example which engages the cylindrical recessed part 62 with the pin 55 via the ring member 61, in order to ensure a rotation prevention function, the ring member 61 is shown. Can be omitted. In such a case, the cylindrical recess 62 may be directly engaged with the pin 55.
  • the electric scroll compressor changed to such a configuration can obtain the same operation and effect as the electric scroll compressor 1 according to the present embodiment.
  • the electric scroll compressor 1 which concerns on this embodiment illustrated the structure which fixes the pin 55 of the autorotation prevention mechanisms to the end plate 13, and forms the cylindrical recessed part 62 in the rocking scroll 21, although this Without being limited thereto, the pin 55 may be fixed to the swing scroll 21 and the cylindrical recess 62 may be formed in the end plate 13.
  • pin & ring coupling is used as the rotation prevention mechanism in the electric scroll compressor 1 according to the present embodiment, a rotation prevention mechanism other than the pin & ring coupling may be used.

Abstract

[Problem] To provide an electrically driven scroll compressor wherein the deformation of an end plate is suppressed and the accuracy of the support surface of an orbiting scroll is improved. [Solution] An electrically driven scroll compressor 1 has: a compression mechanism containing housing member 5 for containing a compression mechanism 3 formed by combining a stationary scroll 11 and an orbiting scroll 21; and a motor containing housing member 6 for containing an electric motor 4 for driving the compression mechanism 3. The motor containing housing member 6 has: a motor affixation section 12 having the stator 16 of the electric motor 4 affixed thereto by interference fit; an end plate 13 having an orbiting scroll-side end surface 22 serving as a surface for supporting the orbiting scroll 21; and a low-rigidity section 14 for connecting the motor affixation section 12 and the end plate 13. The low-rigidity section 14 is formed to have lower rigidity than the motor affixation section 12 and the end plate 13, and the stator 16 is fitted to the motor affixation section 12 by interference fit. When the motor affixation section 12 is deformed and expanded in diameter, the low-rigidity section 14 is elastically deformed to absorb the deformation of the motor affixation section 12.

Description

電動スクロール圧縮機Electric scroll compressor
　この発明は、車両用空調装置の冷凍サイクル等に用いられる電動スクロール圧縮機に関する。 The present invention relates to an electric scroll compressor used for a refrigeration cycle of a vehicle air conditioner.
　従来、電動スクロール圧縮機は、下記の特許文献１に示される構成が公知になっている。この従来の電動スクロール圧縮機は、吐出ポートを備えると共に、固定スクロールと可動スクロールを対向配置させて構成した圧縮部（圧縮機構）を収容する吐出ハウジングと、吸入ポートを備えた吸入ハウジングと、吐出ハウジングと吸入ハウジングとの間に介在され、吸入ハウジングと共に電動モータを収容する中間ハウジングとを備えたものである。そして、中間ハウジングは、電動モータの一部を収容固定するモータ固定部と、このモータ固定部の吐出ハウジング側に一体に形成され、軸受を介して駆動軸を支持する軸受支持部（エンドプレート）とを有している。 Conventionally, an electric scroll compressor has a known configuration shown in Patent Document 1 below. This conventional electric scroll compressor has a discharge port, a discharge housing that houses a compression portion (compression mechanism) configured by disposing a fixed scroll and a movable scroll, a suction housing having a suction port, and a discharge An intermediate housing that is interposed between the housing and the suction housing and accommodates the electric motor together with the suction housing. The intermediate housing is formed integrally with 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 a bearing. And have.
　この従来の電動スクロール圧縮機に用いられる圧縮機構は、それ自体公知のもので、基板及びこの基板から立設された渦巻壁を有する固定スクロールと、この固定スクロールに対向配置されて基板及びこの基板から立設された渦巻壁を有する揺動スクロールとを備え、これら一対のスクロールをそれぞれ渦巻壁を互いに組み合わせ、揺動スクロールをハウジングに収容された電動モータで回転駆動する駆動軸に設けられた偏心軸に係合させて旋回（公転運動）させることで、両スクロールの渦巻壁間に形成された圧縮室を容積を減少させながら中心へ移動させて被圧縮流体を圧縮するようにしている。 A compression mechanism used in this conventional electric scroll compressor is known per se, and a fixed scroll having a substrate and a spiral wall standing upright from the substrate, and a substrate and the substrate disposed opposite to the fixed scroll. And a pair of scrolls, each of which is combined with each other, and an eccentric provided on a drive shaft that is driven to rotate by an electric motor housed in the housing. By engaging with the shaft and turning (revolving motion), the compression chamber formed between the spiral walls of both scrolls is moved to the center while reducing the volume, and the fluid to be compressed is compressed.
　このような電動スクロール圧縮機においては、駆動軸の回転に伴って揺動スクロールに自転力が発生するため、揺動スクロールの自転を防止する自転防止機構が設けられている。この自転防止機構としては、揺動スクロール（可動スクロール）の基板（底板）と、中間ハウジングのエンドプレートとの間に、オルダムカップリング、ピン＆リングカップリング、ボールカップリング等が用いられる。そして、揺動スクロールは、自転防止機構を介して中間ハウジングのエンドプレートに支持された状態で旋回させられるか、又は中間ハウジングのエンドプレートに直接的に支持された状態で旋回させられるようになっている。 In such an electric scroll compressor, since a rotation force is generated in the orbiting scroll as the drive shaft rotates, a rotation prevention mechanism for preventing the rotation of the orbiting scroll is provided. As this anti-rotation mechanism, Oldham coupling, pin & ring coupling, ball coupling or the like is used between the substrate (bottom plate) of the swing scroll (movable scroll) and the end plate of the intermediate housing. The orbiting scroll can be swung while being supported by the end plate of the intermediate housing via the rotation prevention mechanism, or can be swung while being directly supported by the end plate of the intermediate housing. ing.
特開２０００－２９１５５７号公報JP 2000-291557 A
　このような従来から一般的に知られた電動スクロール圧縮機のうちで、電動モータが中間ハウジング内にしまりばめで固定される電動スクロール圧縮機においては、電動モータが中間ハウジング内にしまりばめで固定される際に、中間ハウジングが電動モータによって拡径変形させられ、その中間ハウジングの拡径変形によって揺動スクロールを支持する中間ハウジングのエンドプレートが変形し、揺動スクロールの支持面精度が悪化して、揺動スクロールの旋回精度が低下するか又は揺動スクロールの円滑な旋回運動が困難になり、圧縮機の性能や信頼性に悪影響を及ぼす虞がある。 Among such conventionally known electric scroll compressors, in an electric scroll compressor in which the electric motor is fixed in the intermediate housing with an interference fit, the electric motor is fixed in the intermediate housing with an interference fit. In this case, the intermediate housing is deformed by the electric motor, and the end plate of the intermediate housing that supports the orbiting scroll is deformed by the expanding deformation of the intermediate housing, and the support surface accuracy of the orbiting scroll is deteriorated. As a result, the turning accuracy of the orbiting scroll is reduced, or the smooth orbiting movement of the orbiting scroll becomes difficult, which may adversely affect the performance and reliability of the compressor.
　そこで、本発明は、エンドプレートの変形を抑え、揺動スクロールの支持面精度を向上させ、揺動スクロールの高精度の旋回を可能にして、圧縮機の性能や信頼性を向上させることができる電動スクロール圧縮機を提供することを課題としている。 Therefore, the present invention can suppress the deformation of the end plate, improve the support surface accuracy of the orbiting scroll, enable the orbiting scroll to turn with high accuracy, and improve the performance and reliability of the compressor. It is an object to provide an electric scroll compressor.
　本発明は、固定スクロール１１と揺動スクロール２１とを組み合わせてなる圧縮機構３が収容される圧縮機構収容ハウジング部材５と、前記圧縮機構３を駆動する電動モータ４が収容されるモータ収容ハウジング部材６と、前記電動モータ４を駆動制御するインバータ装置が収容されるインバータ収容ハウジング部材７と、を備えた電動スクロール圧縮機１に関するものである。この発明において、前記モータ収容ハウジング部材６は、前記電動モータ４のステータ１６がしまりばめで固定される筒状のモータ固定部１２と、前記揺動スクロール２１の支持面となる揺動スクロール側端面２２を有するエンドプレート１３と、前記モータ固定部１２と前記エンドプレート１３とを接続する低剛性部１４と、を有している。また、前記低剛性部１４は、前記モータ固定部１２及び前記エンドプレート１３よりも低剛性に形成されている。 The present invention includes a compression mechanism housing member 5 in which a compression mechanism 3 formed by combining a fixed scroll 11 and a swing scroll 21 is housed, and a motor housing housing member in which an electric motor 4 that drives the compression mechanism 3 is housed. 6 and an inverter accommodating housing member 7 in which an inverter device for driving and controlling the electric motor 4 is accommodated. In the present invention, the motor housing housing member 6 includes a cylindrical motor fixing portion 12 to which the stator 16 of the electric motor 4 is fixed by interference fit, and an end surface on the side of the orbiting scroll that serves as a support surface for the orbiting scroll 21. And an end plate 13 having a low rigidity portion 14 connecting the motor fixing portion 12 and the end plate 13. The low-rigidity portion 14 is formed with lower rigidity than the motor fixing portion 12 and the end plate 13.
　本発明に係る電動スクロール圧縮機は、電動モータのステータがモータ収容ハウジング部材のモータ固定部にしまりばめで固定され、モータ固定部がステータによって拡径変形させられると、モータ固定部及びエンドプレートよりも低剛性の低剛性部がモータ固定部の拡径変形にともなって弾性変形させられ、モータ固定部の拡径変形が低剛性部で吸収され、低剛性部とエンドプレートとの接続部分に生じる応力が低剛性部を設けない場合と比較して小さくなる。その結果、本発明に係る電動スクロール圧縮機は、モータ固定部の拡径変形に起因するエンドプレートの変形を抑えることができ、揺動スクロールの旋回運動を支持する支持面精度を向上させることができるため、揺動スクロールの高精度の旋回を可能にして、圧縮機の性能や信頼性を向上させることができる。 In the electric scroll compressor according to the present invention, when the stator of the electric motor is fixed to the motor fixing portion of the motor housing housing member with an interference fit, and the motor fixing portion is expanded and deformed by the stator, the motor fixing portion and the end plate Also, the low-rigidity low-rigidity part is elastically deformed along with the diameter expansion deformation of the motor fixing part. The stress is smaller than when no low rigidity portion is provided. As a result, the electric scroll compressor according to the present invention can suppress the deformation of the end plate due to the diameter expansion deformation of the motor fixing portion, and can improve the accuracy of the support surface that supports the turning motion of the orbiting scroll. Therefore, the swinging scroll can be turned with high accuracy, and the performance and reliability of the compressor can be improved.
本発明に係る電動スクロール圧縮機を示す断面図である。It is sectional drawing which shows the electric scroll compressor which concerns on this invention. 揺動スクロールを示す図であり、図２（ａ）は揺動スクロールの背面図、図２（ｂ）は図２（ａ）のＡ１－Ａ１線に沿って切断して示す揺動スクロールの断面図である。FIG. 2A is a rear view of the orbiting scroll, and FIG. 2B is a cross-sectional view of the orbiting scroll cut along the line A1-A1 of FIG. 2A. FIG. エンドプレートが一体化されたモータ収容ハウジング部材を示す図であり、図３（ａ）はエンドプレートをモータ固定部側から軸方向に見た図、図３（ｂ）はエンドプレートを圧縮機側から軸方向に見た図である。FIG. 3A is a view showing a motor housing housing member integrated with an end plate, FIG. 3A is a view of the end plate viewed from the motor fixing portion side in the axial direction, and FIG. 3B is a view showing the end plate on the compressor side. It is the figure seen from the axial direction. モータ収容ハウジング部材を図１のＡ２－Ａ２線に沿って切断して示す断面図である。FIG. 2 is a cross-sectional view showing a motor housing housing member cut along line A2-A2 of FIG.
　以下、本発明に係る電動スクロール圧縮機を図面に基づき詳述する。 Hereinafter, the electric scroll compressor according to the present invention will be described in detail with reference to the drawings.
　図１に示す電動スクロール圧縮機１は、冷媒を作動流体とする冷凍サイクルに適した電動型圧縮機である。この図１において、アルミ合金で構成されたハウジング２内の図中右側には圧縮機構３が配設され、ハウジング２内の中央部には圧縮機構３を駆動する電動モータ４が配設され、ハウジング２内の図中左側には図示しないインバータ装置が配設されている。なお、図１において、図中左側を圧縮機の前方とし、図中右側を圧縮機の後方としている。 An electric scroll compressor 1 shown in FIG. 1 is an electric compressor suitable for a refrigeration cycle using a refrigerant as a working fluid. In FIG. 1, a compression mechanism 3 is disposed on the right side of the housing 2 made of an aluminum alloy in the drawing, and an electric motor 4 that drives the compression mechanism 3 is disposed in the center of the housing 2. An inverter device (not shown) is disposed on the left side of the housing 2 in the drawing. In FIG. 1, the left side in the figure is the front of the compressor, and the right side in the figure is the rear of the compressor.
　ハウジング２は、圧縮機構３が収容される圧縮機構収容ハウジング部材５と、圧縮機構３を駆動する電動モータ４が収容されるモータ収容ハウジング部材６と、電動モータ４を駆動制御する図示しないインバータ装置が収容されるインバータ収容ハウジング部材７と、を有している。そして、隣り合う圧縮機構収容ハウジング部材５とモータ収容ハウジング部材６は、図示しない位置決めピンによって位置決めされると共に締結ボルト８で軸方向（図１のＸ軸方向）に固定されている。また、隣り合うモータ収容ハウジング部材６とインバータ収容ハウジング部材７は、図示しない位置決めピンによって位置決めされる共に締結ボルト１０で軸方向に固定されている。 The housing 2 includes a compression mechanism housing member 5 in which the compression mechanism 3 is housed, a motor housing housing member 6 in which the electric motor 4 that drives the compression mechanism 3 is housed, and an inverter device (not shown) that drives and controls the electric motor 4. And an inverter housing member 7 for housing the housing. The adjacent compression mechanism housing member 5 and motor housing member 6 are positioned by positioning pins (not shown) and fixed in the axial direction (X-axis direction in FIG. 1) by fastening bolts 8. Adjacent motor housing housing member 6 and inverter housing housing member 7 are positioned by positioning pins (not shown) and fixed in the axial direction by fastening bolts 10.
　圧縮機構ハウジング部材５は、後述する圧縮機構３の固定スクロール１１を収容し、モータ収容ハウジング部材６と対峙する側が開放された有底の筒形形状に形成されている。 The compression mechanism housing member 5 accommodates a fixed scroll 11 of the compression mechanism 3 to be described later, and has a bottomed cylindrical shape with the side facing the motor housing housing member 6 open.
　モータ収容ハウジング部材６は、電動モータ４が固定される筒状のモータ固定部１２と、圧縮機構収容ハウジング部材５と対峙する側に位置するエンドプレート１３と、モータ固定部１２とエンドプレート１３との間に位置してモータ固定部１２の軸方向一端側とエンドプレート１３の径方向外方端側とを接続する低剛性部１４と、を有している。そして、モータ固定部１２、低剛性部１４、及びエンドプレート１３は、一体に形成されており、低剛性部１４がモータ固定部１２及びエンドプレート１３よりも低剛性となるように形成されている。
　低剛性部１４は、モータ収容ハウジング部材６の周方向の全周にわたって形成されており、モータ固定部１２とエンドプレート１３との間を径方向内方へ凹ませて形作られたくびれ部分１５を有している。そして、この低剛性部１４は、後述するように、電動モータ４のステータ１６がモータ固定部１２にしまりばめ（圧入、焼きばめ等）で固定され、モータ固定部１２が拡径変形すると、そのモータ固定部１２の拡径変形に伴って弾性変形し、モータ固定部１２の変形を吸収し、モータ固定部１２の拡径変形に起因するエンドプレート１３の変形を抑えるようになっている。また、低剛性部１４には、後述するように、ボルト収容部１７が径方向外方へ膨出するように形成されている。なお、本実施形態において、くびれ部分１５は、モータ固定部１２の直径をＤとした場合、凹み量ｄがモータ固定部１２の外表面よりも０．０５Ｄ程度となるように径方向内方へ凹ませるか、又は、低剛性部１４の肉厚をｔとした場合、モータ固定部１２の外表面に対する凹み量ｄがｔ／２以上となるように径方向内方へ凹ませるようになっている。しかし、くびれ部分１５は、このような凹み量の例示に限られず、モータ固定部１２の拡径変形量等を考慮して最適の凹み量が決定される。
　エンドプレート１３は、駆動軸１８の一端側を支持する軸支部２０が一体に形成されており、後述する圧縮機構３の揺動スクロール２１の軸方向荷重を揺動スクロール側端面２２で支持することができるようになっている。 The motor housing housing member 6 includes a cylindrical motor fixing portion 12 to which the electric motor 4 is fixed, an end plate 13 located on the side facing the compression mechanism housing housing member 5, a motor fixing portion 12 and an end plate 13. And a low-rigidity portion 14 that connects between the axial one end side of the motor fixing portion 12 and the radially outer end side of the end plate 13. The motor fixing portion 12, the low rigidity portion 14, and the end plate 13 are integrally formed, and the low rigidity portion 14 is formed to have a lower rigidity than the motor fixing portion 12 and the end plate 13. .
The low rigidity portion 14 is formed over the entire circumference in the circumferential direction of the motor housing member 6, and a constricted portion 15 formed by denting the space between the motor fixing portion 12 and the end plate 13 inward in the radial direction. Have. As will be described later, the low-rigidity portion 14 is fixed when the stator 16 of the electric motor 4 is fixed to the motor fixing portion 12 with an interference fit (press-fit, shrink fitting, etc.), and the motor fixing portion 12 is deformed to expand its diameter. The elastic deformation of the motor fixing portion 12 is caused by the deformation of the motor fixing portion 12, the deformation of the motor fixing portion 12 is absorbed, and the deformation of the end plate 13 due to the expansion of the diameter of the motor fixing portion 12 is suppressed. . Further, as described later, the bolt housing portion 17 is formed in the low rigidity portion 14 so as to bulge outward in the radial direction. In the present embodiment, when the diameter of the motor fixing portion 12 is D, the constricted portion 15 is radially inward so that the recess amount d is about 0.05 D from the outer surface of the motor fixing portion 12. If the thickness of the low-rigidity portion 14 is t, the dent amount d with respect to the outer surface of the motor fixing portion 12 is recessed inward in the radial direction so as to be t / 2 or more. Yes. However, the constricted portion 15 is not limited to such an example of the dent amount, and an optimum dent amount is determined in consideration of the diameter expansion deformation amount of the motor fixing portion 12 and the like.
The end plate 13 is integrally formed with a shaft support portion 20 that supports one end side of the drive shaft 18, and supports the axial load of the swing scroll 21 of the compression mechanism 3, which will be described later, on the end surface 22 on the swing scroll side. Can be done.
　インバータ収容ハウジング部材７は、筒状に形成されたインバータ収容筒状部分２３と、モータ収容ハウジング部材６と対峙する側に位置するエンドプレート２４とが一体に形成されている。そして、エンドプレート２４には、駆動軸１８の他端側を支持する軸支部２５が一体に形成されている。 The inverter accommodating housing member 7 is integrally formed with an inverter accommodating cylindrical portion 23 formed in a cylindrical shape and an end plate 24 positioned on the side facing the motor accommodating housing member 6. The end plate 24 is integrally formed with a shaft support 25 that supports the other end of the drive shaft 18.
  モータ収容ハウジング部材６のエンドプレート１３の軸支部２０には、ベアリング２６を介して駆動軸１８の一端側が回動できるように支持されている。また、インバータ収容ハウジング部材７のエンドプレート２４の軸支部２５には、ベアリング２７を介して駆動軸１８の他端側が回転できるように支持されている。そして、ハウジング２の内部は、モータ収容ハウジング部材６のエンドプレート１３とインバータ収容ハウジング部材７のエンドプレート２４により、圧縮機構３を収納する圧縮機構収容部２８、電動モータ４を収納するモータ収容部３０、及び、インバータ装置を収容するインバータ収容部３１に後方側から順に仕切られている。なお、この例において、インバータ収容部３１は、蓋３２がインバータ収容ハウジング部材７の開口部に図示しないボルト等で固定されることによって閉じられる。 一端 A support shaft 20 of the end plate 13 of the motor housing housing member 6 is supported via a bearing 26 so that one end side of the drive shaft 18 can rotate. Further, the other end side of the drive shaft 18 is supported by the shaft support portion 25 of the end plate 24 of the inverter housing member 7 via a bearing 27 so as to be rotatable. The interior of the housing 2 includes a compression mechanism accommodating portion 28 for accommodating the compression mechanism 3 and a motor accommodating portion for accommodating the electric motor 4 by the end plate 13 of the motor accommodating housing member 6 and the end plate 24 of the inverter accommodating housing member 7. 30 and an inverter accommodating portion 31 that accommodates the inverter device are partitioned in order from the rear side. In this example, the inverter accommodating portion 31 is closed by fixing the lid 32 to the opening of the inverter accommodating housing member 7 with a bolt or the like (not shown).
　圧縮機構３は、固定スクロール１１とこれに対向配置された揺動スクロール２１とを有するスクロールタイプのものである。固定スクロール１１は、ハウジング２（圧縮機構収容ハウジング部材５）に対して、軸方向の動きが許容されつつ、後述する位置決めピン３３により径方向への動きが阻止されるようになっている。そして、この固定スクロール１１は、円板状の基板１１ａと、この基板１１ａの外縁に沿って全周に亘って設けられると共に前方に向かって立設された円筒状の外周壁１１ｂと、その外周壁１１ｂの内側において前記基板１１ａから前方に向かって延設された渦巻状の渦巻壁１１ｃと、から構成されている。 The compression mechanism 3 is of a scroll type having a fixed scroll 11 and an orbiting scroll 21 disposed opposite thereto. The fixed scroll 11 is allowed to move in the radial direction with respect to the housing 2 (the compression mechanism housing member 5) while being allowed to move in the axial direction by a positioning pin 33 described later. The fixed scroll 11 includes a disk-shaped substrate 11a, a cylindrical outer peripheral wall 11b which is provided over the entire periphery along the outer edge of the substrate 11a and is erected forward, and an outer periphery thereof. A spiral spiral wall 11c extending forward from the substrate 11a on the inner side of the wall 11b.
  また、揺動スクロール２１は、図１及び図２に示されるように、円板状の基板２１ａと、この基板２１ａから後方に向かって立設された渦巻状の渦巻壁２１ｃと、から構成されている。そして、揺動スクロール２１は、基板２１ａの背面中央に設けられた嵌合凹部３４にラジアル軸受３５が収容され、このラジアル軸受３５を介して駆動軸１８の後端部に形成された偏心軸３６に支持されている。その結果、揺動スクロール２１は、駆動軸１８の軸心と偏心軸３６の軸心との偏心量に応じ、駆動軸１８の軸心を中心とした公転運動が可能になっている。 As shown in FIGS. 1 and 2, the orbiting scroll 21 is composed of a disc-shaped substrate 21a and a spiral-shaped spiral wall 21c erected rearward from the substrate 21a. ing. In the swing scroll 21, a radial bearing 35 is accommodated in a fitting recess 34 provided in the center of the back surface of the substrate 21 a, and an eccentric shaft 36 formed at the rear end portion of the drive shaft 18 via the radial bearing 35. It is supported by. As a result, the orbiting scroll 21 can revolve around the axis of the drive shaft 18 in accordance with the amount of eccentricity between the axis of the drive shaft 18 and the axis of the eccentric shaft 36.
　固定スクロール１１と揺動スクロール２１は、それぞれの渦巻壁１１ｃ、２１ｃを互いに噛み合わせ、固定スクロール１１の基板１１ａ及び渦巻壁１１ｃと揺動スクロール２１の基板２１ａ及び渦巻壁２１ｃとで囲まれた空間によって圧縮室３７が形成されるようになっている。また、固定スクロール１１とモータ収容ハウジング部材６のエンドプレート１３は、位置決めピン３３によって径方向に位置決めされている。 The fixed scroll 11 and the orbiting scroll 21 mesh with the spiral walls 11c and 21c of each other, and the space surrounded by the substrate 11a and the spiral wall 11c of the fixed scroll 11 and the substrate 21a and the spiral wall 21c of the orbiting scroll 21. Thus, a compression chamber 37 is formed. The fixed scroll 11 and the end plate 13 of the motor housing housing member 6 are positioned in the radial direction by positioning pins 33.
　なお、本実施形態に係る電動スクロール圧縮機１は、固定スクロール１１がモータ収容ハウジング部材６のエンドプレート１３に直接組み付けられ、揺動スクロール２１の軸方向荷重がエンドプレート１３の揺動スクロール側端面２２で直接支持されるようになっているが、これに限定されず、固定スクロール１１の外周壁１１ｂとエンドプレート１３との間に薄板状の環状のスラストレース（図示せず）を介在させ、固定スクロール１１とエンドプレート１３とがスラストレースを介して突き合わされると共に、揺動スクロール２１の軸方向荷重がスラストレースを介してエンドプレート１３で支持されるようにしてもよい。 In the electric scroll compressor 1 according to this embodiment, the fixed scroll 11 is directly assembled to the end plate 13 of the motor housing housing member 6, and the axial load of the orbiting scroll 21 is the end surface on the orbiting scroll side of the end plate 13. However, the present invention is not limited to this, and a thin plate-like annular thrust trace (not shown) is interposed between the outer peripheral wall 11b of the fixed scroll 11 and the end plate 13, The fixed scroll 11 and the end plate 13 may be abutted via a thrust trace, and the axial load of the orbiting scroll 21 may be supported by the end plate 13 via the thrust trace.
  モータ収容ハウジング部材６のエンドプレート１３に一体に形成された軸支部２０は、圧縮機収容部２８側に開口する環状凹所であるウエイト収容部３８と、モータ収容部３０側に開口する環状凹所であるベアリング収容部４０と、これらウエイト収容部３８とベアリング収容部４０とを駆動軸１８に沿って貫通する貫通孔４１とが形成されている。そして、ウエイト収容部３８には、駆動軸１８と一体をなして回転するバランスウエイト４２が収容されている。また、ベアリング収容部４０には、駆動軸１８の一端側を回動可能に支持するベアリング２６が収容されている。また、貫通穴４１には、駆動軸１８が十分な隙間をもって収容されている。 The shaft support portion 20 formed integrally with the end plate 13 of the motor housing housing member 6 includes a weight housing portion 38 that is an annular recess that opens to the compressor housing portion 28 side, and an annular recess that opens to the motor housing portion 30 side. A bearing housing portion 40, and a through hole 41 that penetrates the weight housing portion 38 and the bearing housing portion 40 along the drive shaft 18 are formed. The weight accommodating portion 38 accommodates a balance weight 42 that rotates integrally with the drive shaft 18. Further, the bearing accommodating portion 40 accommodates a bearing 26 that rotatably supports one end side of the drive shaft 18. Further, the drive shaft 18 is accommodated in the through hole 41 with a sufficient gap.
　固定スクロール１１の外周壁１１ｂと揺動スクロール２１の渦巻壁２１ｃの最外周部との間には、後述する吸入口４３から導入された冷媒を吸入経路４４を介して吸入する吸入室４５が形成されている。また、ハウジング２内の固定スクロール１１の後方側で且つ固定スクロール１１と圧縮機構収容ハウジング部材５の後端壁４６との間には、吐出室４７が形成されている。この吐出室４７は、圧縮室３７で圧縮された冷媒ガスが固定スクロール１１の略中央に形成された吐出孔４８を介して吐出されるようになっている。そして、この吐出室４７に吐出された冷媒ガスは、吐出口５０を介して外部冷媒回路へ圧送されるようになっている。 A suction chamber 45 is formed between the outer peripheral wall 11b of the fixed scroll 11 and the outermost peripheral portion of the spiral wall 21c of the orbiting scroll 21 to suck in a refrigerant introduced from a suction port 43, which will be described later, via a suction passage 44. Has been. A discharge chamber 47 is formed on the rear side of the fixed scroll 11 in the housing 2 and between the fixed scroll 11 and the rear end wall 46 of the compression mechanism housing member 5. In the discharge chamber 47, the refrigerant gas compressed in the compression chamber 37 is discharged through a discharge hole 48 formed in the approximate center of the fixed scroll 11. The refrigerant gas discharged into the discharge chamber 47 is pumped to the external refrigerant circuit via the discharge port 50.
　モータ収容ハウジング部材６のエンドプレート１３よりも前方の部分に形成されたモータ固定部１２には、電動モータ４を構成するステータ１６とロータ５１とが収容されている。ステータ１６は、円筒状をなす鉄心とこれに巻回されたコイルとで構成され、ハウジング２（モータ収容ハウジング部材６）の内面に固定されている。また、マグネットからなるロータ５１は、駆動軸１８の外周側に固定され、ステータ１６の内側に回転可能に収容されている。そして、ロータ５１は、ステータ１６によって形成される回転磁力により駆動軸１８と一体に回転させられるようになっている。 The stator 16 and the rotor 51 constituting the electric motor 4 are accommodated in the motor fixing portion 12 formed in the front part of the motor accommodating housing member 6 from the end plate 13. The stator 16 is composed of a cylindrical iron core and a coil wound around the iron core, and is fixed to the inner surface of the housing 2 (motor housing housing member 6). Further, the rotor 51 made of a magnet is fixed to the outer peripheral side of the drive shaft 18 and is rotatably accommodated inside the stator 16. The rotor 51 is rotated integrally with the drive shaft 18 by the rotating magnetic force formed by the stator 16.
  尚、インバータ収容ハウジング部材７に収容されるインバータ装置は、エンドプレート２４に形成された図示しない貫通孔に取付けられるターミナル（気密端子）を介してステータ１６と電気的に接続され、電動モータ４に対して給電するようになっている。 The inverter device housed in the inverter housing member 7 is electrically connected to the stator 16 via a terminal (airtight terminal) attached to a through hole (not shown) formed in the end plate 24, and is connected to the electric motor 4. In contrast, power is supplied.
　ハウジング２（モータ収容ハウジング部材６）の側面には、モータ収容部３０に冷媒ガスを吸入する吸入口４３が形成されている。そして、吸入口４３からモータ収容部３０内に流入した冷媒は、吸入経路４４を介して吸入室４５に導かれるようになっている。なお、吸入経路４４は、ステータ１６とハウジング２（モータ収容ハウジング部材６）との間の隙間や、エンドプレート１３に形成された孔５２、及び固定スクロール１１とハウジング２との間に形成される隙間等で構成されている。 On the side surface of the housing 2 (motor housing member 6), a suction port 43 for sucking refrigerant gas into the motor housing 30 is formed. The refrigerant that has flowed into the motor housing portion 30 from the suction port 43 is guided to the suction chamber 45 via the suction path 44. The suction path 44 is formed between the stator 16 and the housing 2 (motor housing housing member 6), the hole 52 formed in the end plate 13, and the fixed scroll 11 and the housing 2. It consists of gaps.
  モータ収容ハウジング部材６の内周面には、図１及び図３に示されるように、ステータ１６と接触するステータ接触部５３とステータ１６と接触しないステータ非接触部５４とが周方向に交互に形成されている。そして、ステータ接触部５３には、ステータ１６の外周部がしまりばめ（圧入、焼き嵌め等）により固定されている。これにより、ステータ１６は、ハウジング２（モータ収容ハウジング部材６）に固定される。そして、吸入経路４４の一部を構成するステータ１６とハウジング２（モータ収容ハウジング部材６）との間の隙間は、ステータ非接触部５４の内壁とステータ１６の外周部との間の間隙により形成されている。 As shown in FIGS. 1 and 3, a stator contact portion 53 that contacts the stator 16 and a stator non-contact portion 54 that does not contact the stator 16 are alternately arranged on the inner peripheral surface of the motor housing member 6 in the circumferential direction. Is formed. And the outer peripheral part of the stator 16 is being fixed to the stator contact part 53 by interference fitting (press fitting, shrink fitting, etc.). Thereby, the stator 16 is fixed to the housing 2 (motor housing member 6). A gap between the stator 16 constituting a part of the suction path 44 and the housing 2 (the motor housing housing member 6) is formed by a gap between the inner wall of the stator non-contact portion 54 and the outer peripheral portion of the stator 16. Has been.
  この実施形態において、対をなすステータ接触部５３とステータ非接触部５４は、中心角にして約６０度の間隔で周方向に６箇所形成されている。そして、ステータ接触部５３は、その周方向の巾がステータ非接触部５４の周方向の幅より相対的に小さく形成されている（ステータ接触部５３の幅は中心角にして約２０度、ステータ非接触部５４の幅は中心角にして約４０度に形成されている）。 に お い て In this embodiment, the stator contact portion 53 and the stator non-contact portion 54 that form a pair are formed at six locations in the circumferential direction at an interval of about 60 degrees as a central angle. The stator contact portion 53 is formed so that its circumferential width is relatively smaller than the circumferential width of the stator non-contact portion 54 (the stator contact portion 53 has a center angle of about 20 degrees, The width of the non-contact portion 54 is formed at a central angle of about 40 degrees).
  また、モータ収容ハウジング部材６のエンドプレート１３には、モータ収容部３０と圧縮機構収容部２８とを連通する孔５２が形成されている。そして、この孔５２は、吸入口４３からモータ収容部３０に流入した冷媒を吸入室４５へ導くようになっている。 The end plate 13 of the motor housing member 6 is formed with a hole 52 that allows the motor housing 30 and the compression mechanism housing 28 to communicate with each other. The hole 52 guides the refrigerant flowing from the suction port 43 into the motor housing 30 to the suction chamber 45.
  また、孔５２は、後述する自転防止機構のピン５５よりも径方向外側に位置するようにエンドプレート１３に形成されており、５箇所のステータ接触部５３の径方向内方側で且つ５箇所のステータ接触部５３と周方向でほぼ重なる位置に（ほぼ同位相となる位置に）、５箇所のステータ接触部５３と対応するように複数形成されている。なお、この例において、孔５２は、６箇所のステータ接触部５３のうちの５箇所のステータ接触部５３にのみ対応するように形成されており、エンドプレート１３の周方向に延びる長孔として形成されている。 Further, the hole 52 is formed in the end plate 13 so as to be positioned radially outside the pin 55 of the rotation prevention mechanism to be described later, and on the radially inner side of the five stator contact portions 53 and at five locations. A plurality of stator contact portions 53 are formed so as to correspond to the five stator contact portions 53 at positions substantially overlapping with the stator contact portions 53 in the circumferential direction (positions having substantially the same phase). In this example, the holes 52 are formed so as to correspond only to the five stator contact portions 53 of the six stator contact portions 53 and are formed as long holes extending in the circumferential direction of the end plate 13. Has been.
　エンドプレート１３の隣合うステータ接触部５３，５３の間には、締結ボルト１０の軸部１０ａを挿通するボルト孔５６がそれぞれ形成されている。このボルト孔５６に軸部１０ａが挿通される締結ボルト１０は、モータ収容ハウジング部材６とインバータ収容ハウジング部材７とを固定するために使用される。この締結ボルト１０の軸部１０ａは、低剛性部１４に部分的に形成されたボルト収容部１７に隙間をもって係合されている。このボルト収容部１７は、低剛性部１４の締結ボルト１０の軸部１０ａが挿通される箇所に形成されており、低剛性部１４のくびれ部分１５の径方向外方へ膨出して締結ボルト１０の軸部１０ａを覆い、締結ボルト１０の軸部１０ａが外気に晒されないようにして、締結ボルト１０の軸部１０ａを保護している。なお、ボルト収容部１７は、締結ボルト１０と同数形成され且つ断面形状が略円弧形状であり、低剛性部１４の捩り方向の剛性を高めている。 Between the adjacent stator contact portions 53, 53 of the end plate 13, bolt holes 56 through which the shaft portion 10a of the fastening bolt 10 is inserted are formed. The fastening bolt 10 in which the shaft portion 10 a is inserted into the bolt hole 56 is used for fixing the motor housing housing member 6 and the inverter housing housing member 7. The shaft portion 10a of the fastening bolt 10 is engaged with a bolt housing portion 17 partially formed in the low-rigidity portion 14 with a gap. The bolt housing portion 17 is formed at a location where the shaft portion 10a of the fastening bolt 10 of the low-rigidity portion 14 is inserted, and bulges outward in the radial direction of the constricted portion 15 of the low-rigidity portion 14 to tighten the fastening bolt 10. The shaft portion 10a of the fastening bolt 10 is protected so that the shaft portion 10a of the fastening bolt 10 is not exposed to the outside air. The bolt accommodating portions 17 are formed in the same number as the fastening bolts 10 and have a substantially arc shape in cross section, and enhance the rigidity of the low rigidity portion 14 in the torsional direction.
  エンドプレート１３のモータ収容部３０側の面には、エンドプレート１３を補強する補強用リブ５７が軸支部２０から低剛性部１４の内周面にかけて径方向に一体に延設されている。この補強用リブ５７は、ステータ非接触部５４の軸方向に対応する位置、すなわち、ステータ非接触部５４と周方向でほぼ重なる位置に（ほぼ同位相となる位置に）、周方向に略等間隔に複数形成されている（後述するピン５５の数に合わせて周方向に６箇所設けられている）。したがって、補強用リブ５７は、ステータ接触部５３と周方向の位置が重ならないように（同位相とならないように）形成され、ステータ接触部５３の変形による応力が直接伝達されないようになっている。 Reinforcing ribs 57 that reinforce the end plate 13 are integrally extended in a radial direction from the shaft support portion 20 to the inner peripheral surface of the low-rigidity portion 14 on the surface of the end plate 13 on the motor accommodating portion 30 side. The reinforcing rib 57 is located at a position corresponding to the axial direction of the stator non-contact portion 54, that is, at a position that substantially overlaps the stator non-contact portion 54 in the circumferential direction (at a position that is substantially in phase), and substantially the same in the circumferential direction. A plurality of intervals are formed (six locations are provided in the circumferential direction in accordance with the number of pins 55 described later). Therefore, the reinforcing rib 57 is formed so that the stator contact portion 53 does not overlap the circumferential position (so as not to have the same phase), and stress due to deformation of the stator contact portion 53 is not directly transmitted. .
  尚、図３（ｂ）に示されるように、固定スクロール１１をエンドプレート１３に対して位置決めする位置決めピン３３は、それぞれの孔５２を含む仮想円５８上に設けられ、エンドプレート１３に形成されたピン取り付け孔６０に圧入することで固定されている。 As shown in FIG. 3B, the positioning pins 33 for positioning the fixed scroll 11 with respect to the end plate 13 are provided on the virtual circle 58 including the respective holes 52 and formed on the end plate 13. It is fixed by press-fitting into the pin mounting hole 60.
　以上の構成において、圧縮機構３は、ロータ５１と駆動軸１８が一体として回転すると、揺動スクロール２１が駆動軸１８と一体に回動する偏心軸３６を介して駆動され、揺動スクロール２１が駆動軸１８の軸心を中心として公転運動する。これにより、吸入口４３からモータ収容部３０に吸引された冷媒は、ロータ周囲のステータ非接触部５４とステータ１６との間の隙間やステータ１６のコイルの隙間を通り、エンドプレート１３の孔５２を介して吸入室４５に導かれる。圧縮機構３の圧縮室３７は、揺動スクロール２１の公転運動により、固定スクロール１１の渦巻壁１１ｃと揺動スクロール２１の渦巻壁２１ｃの外周側から中心側へ容積を徐々に小さくしつつ移動する。その結果、吸入室４５から圧縮室３７に吸入された冷媒ガスは、揺動スクロール２１の公転運動に伴って圧縮される。そして、この圧縮された冷媒ガスは、固定スクロール１１の基板１１ａに形成された吐出孔４８を介して吐出室４７に吐出され、吐出室４７から吐出口５０を介して外部冷媒回路へ送出される。 In the above configuration, when the rotor 51 and the drive shaft 18 rotate as a unit, the compression mechanism 3 is driven via the eccentric shaft 36 that rotates integrally with the drive shaft 18, and the swing scroll 21 is Revolves around the axis of the drive shaft 18. Thereby, the refrigerant sucked into the motor housing portion 30 from the suction port 43 passes through the gap between the stator non-contact portion 54 around the rotor and the stator 16 and the gap of the coil of the stator 16, and the hole 52 of the end plate 13. Through the suction chamber 45. The compression chamber 37 of the compression mechanism 3 moves while gradually reducing the volume from the outer peripheral side of the spiral wall 11c of the fixed scroll 11 and the spiral wall 21c of the swing scroll 21 to the center side by the revolving motion of the swing scroll 21. . As a result, the refrigerant gas sucked into the compression chamber 37 from the suction chamber 45 is compressed as the swinging scroll 21 revolves. The compressed refrigerant gas is discharged into the discharge chamber 47 through the discharge hole 48 formed in the substrate 11 a of the fixed scroll 11, and is sent from the discharge chamber 47 to the external refrigerant circuit through the discharge port 50. .
  ところで、上述した電動スクロール圧縮機１においては、駆動軸１８の回転に伴って揺動スクロール２１に自転力が発生するため、揺動スクロール２１の自転を規制した状態で、揺動スクロール２１を駆動軸１８の軸心の周りに公転運動させる必要がある。このため、本実施形態に係る電動スクロール圧縮機１は、揺動スクロール２１の基板２１ａとモータ収容ハウジング部材６のエンドプレート１３との間に、ピン５５を係合させる自転防止機構が設けられている。 By the way, in the electric scroll compressor 1 described above, since the rotation force is generated in the swing scroll 21 as the drive shaft 18 rotates, the swing scroll 21 is driven in a state where the rotation of the swing scroll 21 is restricted. It is necessary to revolve around the axis of the shaft 18. For this reason, the electric scroll compressor 1 according to the present embodiment is provided with a rotation prevention mechanism that engages the pin 55 between the substrate 21a of the swing scroll 21 and the end plate 13 of the motor housing housing member 6. Yes.
  この実施形態において、自転防止機構としては、ピン＆リングカップリングが採用されており、周方向に配設された複数のピン５５と、これらピン５５に係合する複数のリング部材６１と、それぞれのリング部材６１を収容する複数の円筒状凹部６２とで構成されている。 In this embodiment, a pin & ring coupling is adopted as the rotation preventing mechanism, and a plurality of pins 55 arranged in the circumferential direction and a plurality of ring members 61 engaged with these pins 55, respectively. And a plurality of cylindrical recesses 62 for accommodating the ring member 61.
  円筒状凹部６２は、図１及び図２に示されるように、揺動スクロール２１の基板２１ａの背面（エンドプレート１３に対向する面）に断面円状の窪みを形成して構成されているもので、揺動スクロール２１の嵌合凹部３４の周囲に等間隔（この例では、６０度間隔）に形成されている。リング部材６１は、鉄製の円環状のもので、円筒状凹部６２の内径よりも小さい外径を有しており、円筒状凹部６２に遊嵌されるようになっている。また、このリング部材６１は、軸方向の幅が円筒状凹部６２の軸方向幅にほぼ等しいか又は円筒状凹部６２の軸方向幅よりも小さく形成されている。 As shown in FIGS. 1 and 2, the cylindrical recess 62 is configured by forming a recess having a circular cross section on the back surface (surface facing the end plate 13) of the substrate 21 a of the orbiting scroll 21. Thus, they are formed at equal intervals (in this example, at intervals of 60 degrees) around the fitting recess 34 of the orbiting scroll 21. The ring member 61 has an annular shape made of iron, has an outer diameter smaller than the inner diameter of the cylindrical recess 62, and is loosely fitted into the cylindrical recess 62. The ring member 61 is formed such that the axial width is substantially equal to the axial width of the cylindrical recess 62 or smaller than the axial width of the cylindrical recess 62.
  ピン５５は、鉄製の円柱状に形成され、リング部材６１の内径よりも小さい外径に形成され、モータ収容ハウジング部材６のエンドプレート１３のウエイト収容部３８の周囲で且つ揺動スクロール２１に対向する揺動スクロール側端面２２に、円筒状凹部６２の位置に合わせて等間隔に固定されている。この実施形態において、ピン５５は、エンドプレート１３に形成されたピン取付孔６３に圧入することで固定され、また、エンドプレート１３の補強用リブ５７が形成された部分の背面に固定されている。 The pin 55 is formed in an iron column shape, is formed to have an outer diameter smaller than the inner diameter of the ring member 61, and faces the swing scroll 21 around the weight accommodating portion 38 of the end plate 13 of the motor accommodating housing member 6. The rocking scroll side end face 22 is fixed at equal intervals according to the position of the cylindrical recess 62. In this embodiment, the pin 55 is fixed by being press-fitted into a pin mounting hole 63 formed in the end plate 13, and is fixed to the back surface of the portion of the end plate 13 where the reinforcing rib 57 is formed. .
  したがって、揺動スクロール２１は、駆動軸１８の回転により自転力が発生するが、エンドプレート１３に固定されたピン５５が円筒状凹部６２内のリング部材６１の内周面に当接し、ピン５５がリング部材６１を介して円筒状凹部６２に係合されるため、動きが制限される。その結果、揺動スクロール２１は、自転が規制された状態で、駆動軸１８の軸心に対して公転運動のみが許容されるようになっている。 Therefore, in the orbiting scroll 21, a rotation force is generated by the rotation of the drive shaft 18, but the pin 55 fixed to the end plate 13 contacts the inner peripheral surface of the ring member 61 in the cylindrical recess 62, and the pin 55 Is engaged with the cylindrical recess 62 via the ring member 61, the movement is restricted. As a result, the orbiting scroll 21 is allowed to revolve only with respect to the axis of the drive shaft 18 in a state where rotation is restricted.
　以上のように、本実施形態に係る電動スクロール圧縮機１は、電動モータ４のステータ１６がモータ収容ハウジング部材６のモータ固定部１２にしまりばめで固定され、モータ固定部１２がステータ１６によって拡径変形させられると、モータ固定部１２及びエンドプレート１３よりも低剛性の低剛性部１４がモータ固定部１２の拡径変形にともなって弾性変形させられ、モータ固定部１２の拡径変形が低剛性部１４で吸収され、低剛性部１４とエンドプレート１３との接続部分に生じる応力（モータ固定部１２の拡径変形に起因して生じる応力）が低剛性部１４を設けない場合と比較して小さくなる。その結果、本実施形態に係る電動スクロール圧縮機１は、モータ固定部１２の拡径変形に起因するエンドプレート１３の変形（揺動スクロール側端面２２の倒れ等）を抑えることができ、揺動スクロール２１の旋回運動を支持する支持面精度を向上させることができるため、揺動スクロール２１の高精度の旋回を可能にして、圧縮機の性能や信頼性を向上させることができる。 As described above, in the electric scroll compressor 1 according to this embodiment, the stator 16 of the electric motor 4 is fixed to the motor fixing portion 12 of the motor housing housing member 6 by interference fit, and the motor fixing portion 12 is expanded by the stator 16. When the diameter is deformed, the low-rigidity portion 14 having a rigidity lower than that of the motor fixing portion 12 and the end plate 13 is elastically deformed along with the diameter expansion deformation of the motor fixing portion 12, and the diameter expansion deformation of the motor fixing portion 12 is low. Compared with the case where the low-rigidity portion 14 is not provided, the stress that is absorbed by the rigid portion 14 and is generated in the connection portion between the low-rigidity portion 14 and the end plate 13 (stress caused by the diameter expansion deformation of the motor fixing portion 12). Become smaller. As a result, the electric scroll compressor 1 according to the present embodiment can suppress the deformation of the end plate 13 due to the diameter-enlarging deformation of the motor fixing portion 12 (the falling of the rocking scroll side end surface 22 and the like), and the rocking Since the support surface accuracy for supporting the turning motion of the scroll 21 can be improved, the swinging scroll 21 can be turned with high accuracy, and the performance and reliability of the compressor can be improved.
　また、本実施形態に係る電動スクロール圧縮機１は、低剛性部１４がモータ収容ハウジング部材６の周方向の全周にわたって形成されているため、モータ固定部１２の拡径変形をモータ収容ハウジング部材６の周方向の全周にわたって均等に吸収することができ、エンドプレート１３の周方向に不均衡な歪みを生じさせるようなことがない。 Moreover, since the low-rigidity part 14 is formed over the perimeter of the circumferential direction of the motor accommodating housing member 6, the electric scroll compressor 1 which concerns on this embodiment does the diameter expansion deformation of the motor fixing | fixed part 12 in a motor accommodating housing member. 6 can be absorbed evenly over the entire circumference in the circumferential direction, and no unbalanced distortion is caused in the circumferential direction of the end plate 13.
　また、本実施形態に係る電動スクロール圧縮機１は、低剛性部１４がモータ固定部１２とエンドプレート１３との間を径方向内方へ凹ませて形作られたくびれ部分１５を有するため、図１の断面図上における低剛性部１４の長さがくびれ部分１５を設けなかった場合と比較して長くなると共に、低剛性部１４がモータ固定部１２の拡径変形に追従して変形し易くなっている。そのため、本実施形態に係る電動スクロール圧縮機１は、低剛性部１４にくびれ部分１５を設けない場合と比較し、低剛性部１４とエンドプレート１３との接続部分に生じる応力を低減でき、モータ固定部１２の拡径変形に起因するエンドプレート１３の変形をより一層小さくすることができる。 In addition, the electric scroll compressor 1 according to the present embodiment includes a constricted portion 15 formed by the low-rigidity portion 14 being recessed radially inward between the motor fixing portion 12 and the end plate 13. The length of the low-rigidity portion 14 on the cross-sectional view of FIG. 1 is longer than that when the constricted portion 15 is not provided, and the low-rigidity portion 14 easily deforms following the diameter expansion deformation of the motor fixing portion 12. It has become. Therefore, the electric scroll compressor 1 according to the present embodiment can reduce the stress generated in the connection portion between the low-rigidity portion 14 and the end plate 13 as compared with the case where the constricted portion 15 is not provided in the low-rigidity portion 14. The deformation of the end plate 13 due to the diameter expansion deformation of the fixing portion 12 can be further reduced.
　また、本実施形態に係る電動スクロール圧縮機１は、低剛性部１４のくびれ部分１５の一部に径方向外方に膨出するボルト収容部１７が形成され、モータ収容ハウジング部材６とインバータ収容ハウジング部材７を固定する締結ボルト１０の軸部１０ａをボルト収容部１７で覆い、締結ボルト１０の軸部１０ａが外気に晒されないようにして、締結ボルト１０の軸部１０ａをボルト収容部１７で保護しているため、締結ボルト１０の腐食等に起因する耐久性の低下を防止できると共に、モータ収容ハウジング部材６の低剛性部１４におけるねじれ剛性を高めることができる。 Further, in the electric scroll compressor 1 according to the present embodiment, a bolt housing portion 17 bulging radially outward is formed in a part of the constricted portion 15 of the low-rigidity portion 14, and the motor housing housing member 6 and the inverter housing are accommodated. The shaft portion 10a of the fastening bolt 10 that fixes the housing member 7 is covered with the bolt housing portion 17, and the shaft portion 10a of the fastening bolt 10 is covered with the bolt housing portion 17 so that the shaft portion 10a of the fastening bolt 10 is not exposed to the outside air. Since it protects, the fall of durability resulting from corrosion etc. of the fastening bolt 10 can be prevented, and the torsional rigidity in the low rigidity portion 14 of the motor housing housing member 6 can be increased.
　また、本実施形態に係る電動スクロール圧縮機１は、自転防止機構としてピン＆リングカップリングが用いられ、円筒状凹部６２が揺動スクロール２１の基板２１ａに形成されているので、可動部材としての揺動スクロール２１の重量を低減することが可能となり、揺動スクロール２１の駆動性の向上を図ることができる。しかも、ピン５５は、揺動スクロール２１の基板２１ａよりも剛性の高い固定部材としてのモータ収容ハウジング部材６のエンドプレート１３に圧入固定されている。その結果、本実施形態に係る電動スクロール圧縮機１は、ピン５５の圧入時のエンドプレート１３の変形が殆どなく、また、ピン５５がリング部材６１を介して円筒状凹部６２に係合し、ピン５５が径方向荷重を受ける場合でも、その径方向荷重によりピン５５を圧入している箇所が変形することもなくなり、ピン５５の組み付け精度を高めることが可能となる（ピン５５の傾倒を回避することが可能となる）。したがって、本実施形態に係る電動スクロール圧縮機１は、上記エンドプレート１３の支持面精度の向上の効果と相俟って、揺動スクロール２１の高精度の旋回を可能にし、圧縮機の性能や信頼性をより一層向上させることができる Further, in the electric scroll compressor 1 according to the present embodiment, a pin & ring coupling is used as an anti-rotation mechanism, and the cylindrical recess 62 is formed in the substrate 21a of the orbiting scroll 21. The weight of the orbiting scroll 21 can be reduced, and the driveability of the orbiting scroll 21 can be improved. In addition, the pin 55 is press-fitted and fixed to the end plate 13 of the motor housing housing member 6 as a fixing member having higher rigidity than the substrate 21a of the swing scroll 21. As a result, in the electric scroll compressor 1 according to the present embodiment, the end plate 13 is hardly deformed when the pin 55 is press-fitted, and the pin 55 is engaged with the cylindrical recess 62 via the ring member 61. Even when the pin 55 receives a radial load, the portion where the pin 55 is press-fitted by the radial load is not deformed, and the assembly accuracy of the pin 55 can be improved (avoid tilting of the pin 55). Can be done). Therefore, the electric scroll compressor 1 according to the present embodiment, together with the effect of improving the support surface accuracy of the end plate 13, enables the swing scroll 21 to turn with high accuracy, Reliability can be further improved
　また、本実施形態に係る電動スクロール圧縮機１は、エンドプレート１３に設けられた補強用リブ５７が形成された部分にピン５５が固定されているので、エンドプレート１３の中でもより剛性の高い箇所にピン５５が固定されることになり、ピン５５の圧入固定時や径方向荷重を受ける際のピン５５が圧入されている箇所の変形をより確実に回避することが可能となる。 Further, in the electric scroll compressor 1 according to the present embodiment, the pin 55 is fixed to the portion where the reinforcing rib 57 provided on the end plate 13 is formed. Therefore, the deformation of the portion where the pin 55 is press-fitted at the time of press-fitting and fixing the pin 55 or receiving a radial load can be avoided more reliably.
  また、本実施形態に係る電動スクロール圧縮機１は、エンドプレート１３と固定スクロール１１とを位置決めする位置決めピン３３が軸中心から径方向外方へ離れた位置（複数の孔５２を含む仮想円５８上）に設けられ、しかも、その位置決めピン３３が低剛性部１４の機能によって変形を抑えられたエンドプレート１３に固定されているため、固定スクロール１１が高い精度でエンドプレート１３に位置決めされる。その結果、本実施形態に係る電動スクロール圧縮機１は、固定スクロール１１と揺動スクロール２１とを高精度で組み合わせることができ、上記本実施形態の各効果と相俟って、圧縮機の性能や信頼性をより一層向上させることができる。 In the electric scroll compressor 1 according to the present embodiment, the positioning pin 33 for positioning the end plate 13 and the fixed scroll 11 is positioned away from the center of the shaft radially outward (a virtual circle 58 including a plurality of holes 52). Furthermore, since the positioning pin 33 is fixed to the end plate 13 whose deformation is suppressed by the function of the low-rigidity portion 14, the fixed scroll 11 is positioned to the end plate 13 with high accuracy. As a result, the electric scroll compressor 1 according to the present embodiment can combine the fixed scroll 11 and the orbiting scroll 21 with high precision, and in combination with the effects of the present embodiment, the performance of the compressor. And reliability can be further improved.
　なお、本実施形態に係る電動スクロール圧縮機１は、ピン５５にリング部材６１を介して円筒状凹部６２を係合する例を示したが、自転防止機能を確保するためには、リング部材６１を省略することも可能である。このような場合には、ピン５５に円筒状凹部６２を直接係合するようにしてもよい。このような構成に変更した電動スクロール圧縮機は、本実施形態に係る電動スクロール圧縮機１と同様の作用効果を得ることが可能となる。 In addition, although the electric scroll compressor 1 which concerns on this embodiment showed the example which engages the cylindrical recessed part 62 with the pin 55 via the ring member 61, in order to ensure a rotation prevention function, the ring member 61 is shown. Can be omitted. In such a case, the cylindrical recess 62 may be directly engaged with the pin 55. The electric scroll compressor changed to such a configuration can obtain the same operation and effect as the electric scroll compressor 1 according to the present embodiment.
  また、本実施形態に係る電動スクロール圧縮機１は、自転防止機構のうちのピン５５をエンドプレート１３に固定し、円筒状凹部６２を揺動スクロール２１に形成する構成を例示したが、これに限られず、ピン５５を揺動スクロール２１に固定し、円筒状凹部６２をエンドプレート１３に形成するようにしてもよい。 Moreover, although the electric scroll compressor 1 which concerns on this embodiment illustrated the structure which fixes the pin 55 of the autorotation prevention mechanisms to the end plate 13, and forms the cylindrical recessed part 62 in the rocking scroll 21, although this Without being limited thereto, the pin 55 may be fixed to the swing scroll 21 and the cylindrical recess 62 may be formed in the end plate 13.
　また、本実施形態に係る電動スクロール圧縮機１は、自転防止機構としてピン＆リングカップリングが用いられているが、ピン＆リングカップリング以外の自転防止機構を使用するようにしてもよい。 Moreover, although the pin & ring coupling is used as the rotation prevention mechanism in the electric scroll compressor 1 according to the present embodiment, a rotation prevention mechanism other than the pin & ring coupling may be used.
　１　　電動スクロール圧縮機
　３　　圧縮機構
　４　　電動モータ
　５　　圧縮機構収容ハウジング部材
　６　　モータ収容ハウジング部材
　７　　インバータ収容ハウジング部材
　１１　固定スクロール
　１２　モータ固定部
　１３　エンドプレート
　１４　低剛性部
　１６　ステータ
　２１　揺動スクロール
　２２　揺動スクロール側端面 DESCRIPTION OF SYMBOLS 1 Electric scroll compressor 3 Compression mechanism 4 Electric motor 5 Compression mechanism accommodating housing member 6 Motor accommodating housing member 7 Inverter accommodating housing member 11 Fixed scroll 12 Motor fixed part 13 End plate 14 Low-rigidity part 16 Stator 21 Orbiting scroll 22 Oscillating Scroll side end face

Claims (5)

  1. 　固定スクロールと揺動スクロールとを組み合わせてなる圧縮機構が収容される圧縮機構収容ハウジング部材と、前記圧縮機構を駆動する電動モータが収容されるモータ収容ハウジング部材と、前記電動モータを駆動制御するインバータ装置が収容されるインバータ収容ハウジング部材と、を備えた電動スクロール圧縮機において、
    　前記モータ収容ハウジング部材は、前記電動モータのステータがしまりばめで固定される筒状のモータ固定部と、前記揺動スクロールの支持面となる揺動スクロール側端面を有するエンドプレートと、前記モータ固定部と前記エンドプレートとを接続する低剛性部と、を有し、
    　前記低剛性部は、前記モータ固定部及び前記エンドプレートよりも低剛性に形成されている、
    　ことを特徴とする電動スクロール圧縮機。     A compression mechanism housing member that houses a compression mechanism that combines a fixed scroll and an orbiting scroll, a motor housing housing member that houses an electric motor that drives the compression mechanism, and an inverter that controls the drive of the electric motor In an electric scroll compressor comprising an inverter housing member in which the device is housed,
    The motor housing member includes a cylindrical motor fixing portion to which a stator of the electric motor is fixed by an interference fit, an end plate having a swing scroll side end surface serving as a support surface of the swing scroll, and the motor fixing. A low-rigidity part connecting the part and the end plate,
    The low-rigidity part is formed with lower rigidity than the motor fixing part and the end plate.
    An electric scroll compressor characterized by that.
  2. 　前記低剛性部は、前記モータ収容ハウジング部材の周方向の全周にわたって形成されている、
    　ことを特徴とする請求項１に記載の電動スクロール圧縮機。     The low rigidity portion is formed over the entire circumference in the circumferential direction of the motor housing member.
    The electric scroll compressor according to claim 1.
  3. 　前記低剛性部は、前記モータ収容ハウジング部材の前記モータ固定部と前記エンドプレートとの間を径方向内方へ凹ませて形作られたくびれ部分を有する、
    　ことを特徴とする請求項１又は２に記載の電動スクロール圧縮機。     The low-rigidity portion has a constricted portion formed by recessing radially inward between the motor fixing portion and the end plate of the motor housing housing member.
    The electric scroll compressor according to claim 1 or 2.
  4. 　前記モータ収容ハウジング部材は、前記インバータ収容ハウジング部材に複数のボルトで固定されており、
    　前記ボルトの軸部は、前記くびれ部分の一部に形成されたボルト収容部に隙間をもって係合され、
    　前記ボルト収容部は、前記くびれ部分の径方向外方に膨出して前記ボルトの軸部を覆っている、
    　ことを特徴とする請求項３に記載の電動スクロール圧縮機。     The motor housing member is fixed to the inverter housing member with a plurality of bolts,
    The shaft portion of the bolt is engaged with a bolt accommodating portion formed in a part of the constricted portion with a gap,
    The bolt housing portion bulges outward in the radial direction of the constricted portion and covers the shaft portion of the bolt.
    The electric scroll compressor according to claim 3.
  5. 　前記揺動スクロールの前記エンドプレートに対向する面と前記エンドプレートの前記揺動スクロール側端面のいずれか一方には、前記揺動スクロールの自転を防止する自転防止機構としてのピン＆リングカップリングのピンが取り付けられ、
    　前記揺動スクロールの前記エンドプレートに対向する面と前記エンドプレートの前記揺動スクロール側端面のいずれか他方には、前記ピンと係合し、前記ピンと共に前記自転防止機構を構成する円筒状凹部が形成された、
    　ことを特徴とする請求項１乃至４のいずれかに記載の電動スクロール圧縮機。     A pin & ring coupling as a rotation preventing mechanism for preventing the rotation of the swing scroll is provided on one of the surface of the swing scroll facing the end plate and the end surface of the end plate on the swing scroll side. The pin is attached,
    A cylindrical recess that engages with the pin and forms the rotation prevention mechanism together with the pin is provided on one of the surface of the swing scroll facing the end plate and the end surface of the end plate on the swing scroll side. Been formed,
    The electric scroll compressor according to any one of claims 1 to 4.
PCT/JP2015/085398 2014-12-24 2015-12-17 Electrically driven scroll compressor WO2016104336A1 (en)

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EP15872905.3A EP3239526B1 (en) 2014-12-24 2015-12-17 Electrically driven scroll compressor
CN201580068389.6A CN107002676B (en) 2014-12-24 2015-12-17 Electric scroll compressor
JP2016566179A JP6587636B2 (en) 2014-12-24 2015-12-17 Electric scroll compressor

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EP3239526A1 (en) 2017-11-01
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