JP4508188B2 - Motor and compressor - Google Patents

Description

  The present invention relates to a motor used in a compressor such as an air conditioner or a refrigerator, and a compressor having the motor.

2. Description of the Related Art Conventionally, a motor used for use in a compressor has a rotor and a stator disposed on the outer side in the radial direction of the rotor. The stator includes a stator core, insulators assembled to both end surfaces of the stator core in the axial direction, and coils wound around the stator core and the insulator (Japanese Patent Laid-Open No. 2001-55979: Patent Document 1). reference).
JP 2001-55979 A

  However, in the conventional motor, the insulator may be erroneously assembled to the end face of the stator core, for example, with respect to the circumferential position of the end face.

  For this reason, there has been a drawback that relative displacement occurs between the insulator and the end face of the stator core, and the coil is damaged when the coil is wound around the insulator and the stator core.

  Accordingly, an object of the present invention is to provide a motor capable of preventing erroneous assembly of the insulator with respect to the stator core.

In order to solve the above problems, the motor of the present invention is
Having a rotor and a stator disposed radially outside the rotor;
The stator includes a stator core, insulators assembled to both end surfaces of the stator core in the axial direction, and a coil wound together around the stator core and the insulator,
The stator core and the insulator are provided with a wrong assembly prevention mechanism for preventing the wrong assembly of the insulator with respect to the both end faces of the stator core and the wrong assembly of the insulator with respect to the circumferential position of the respective end faces of the stator core. It is,
The misassembly prevention mechanism has a plurality of locking holes provided in the stator core, and a plurality of locking claws provided in the insulator while being locked in each of the plurality of locking holes,
Each of the locking claws and the locking holes has at least three, the shapes of all the locking claws are different from each other, and the shapes of all the locking holes correspond to the shapes of the locking claws. It is characterized by being different from each other .

According to the motor of the present invention, the stator core and the insulator are prevented from being misassembled with respect to the both end faces of the stator core and with respect to the circumferential positions of the end faces of the stator core. Since the mechanism for preventing erroneous assembly is provided, when the insulator is assembled to the stator core, the erroneous assembly of the insulator to the stator core can be prevented. Therefore, for example, the defect of the coil due to the erroneous assembly can be eliminated. The misassembly prevention mechanism includes a plurality of locking holes provided in the stator core, and a plurality of locking claws provided in the insulator while being locked in the plurality of locking holes. As a result, the erroneous assembly prevention mechanism can be configured simply. Further, each of the locking claws and the locking holes has at least three, the shapes of all the locking claws are different from each other, and the shapes of all the locking holes are the shapes of the locking claws. Therefore, it is possible to prevent erroneous assembly of the insulator with respect to the stator core with a simple configuration.

In the motor of one embodiment,
Having a rotor and a stator disposed radially outside the rotor;
The stator includes a stator core, insulators assembled to both end surfaces of the stator core in the axial direction, and a coil wound together around the stator core and the insulator,
The stator core and the insulator are provided with a wrong assembly prevention mechanism for preventing the wrong assembly of the insulator with respect to the both end faces of the stator core and the wrong assembly of the insulator with respect to the circumferential position of the respective end faces of the stator core. And
The misassembly prevention mechanism has a plurality of locking holes provided in the stator core, and a plurality of locking claws provided in the insulator while being locked in each of the plurality of locking holes,
The central angles between the adjacent locking claws are different from each other, and the central angles between the adjacent locking holes are different from each other corresponding to the central angle between the adjacent locking claws.

According to the motor of this embodiment, the stator core and the insulator include the incorrect assembly of the insulator with respect to the both end surfaces of the stator core and the incorrect assembly of the insulators with respect to the circumferential positions of the end surfaces of the stator core. Since the prevention mechanism for preventing misassembly is provided, when the insulator is assembled to the stator core, the assembly of the insulator to the stator core can be prevented. Therefore, for example, the defect of the coil due to the erroneous assembly can be eliminated. The misassembly prevention mechanism includes a plurality of locking holes provided in the stator core, and a plurality of locking claws provided in the insulator while being locked in the plurality of locking holes. As a result, the erroneous assembly prevention mechanism can be configured simply. In addition, the central angles between the adjacent locking claws are different from each other, and the central angles between the adjacent locking holes are different from each other corresponding to the central angle between the adjacent locking claws. With a simple configuration, it is possible to prevent erroneous assembly of the insulator with respect to the stator core.

  The compressor of the present invention includes a sealed container, a compression element disposed in the sealed container, and the motor disposed in the sealed container and driving the compression element through a shaft. It is characterized by being.

  According to the compressor of the present invention, since the motor is provided, the motor has a good quality, and a high-quality compressor can be realized.

  According to the motor of the present invention, the stator core and the insulator are prevented from being misassembled with respect to the both end faces of the stator core and with respect to the circumferential positions of the end faces of the stator core. Since the mechanism for preventing erroneous assembly is provided, it is possible to prevent erroneous assembly of the insulator with respect to the stator core.

  Moreover, according to the compressor of this invention, since the motor is provided, the quality can be improved.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

(First embodiment)
FIG. 1 is a longitudinal sectional view showing an embodiment of the compressor of the present invention. The compressor includes a sealed container 1, a compression element 2 disposed in the sealed container 1, and a motor 3 disposed in the sealed container 1 and driving the compression element 2 via a shaft 12. ing.

  This compressor is a so-called vertical high-pressure dome type rotary compressor, in which the compression element 2 is placed down and the motor 3 is placed up in the sealed container 1. The rotor 6 of the motor 3 drives the compression element 2 via the shaft 12.

  The compression element 2 sucks refrigerant gas from the accumulator 10 through the suction pipe 11. The refrigerant gas is obtained by controlling a condenser, an expansion mechanism, and an evaporator (not shown) that constitute an air conditioner as an example of a refrigeration system together with the compressor. This refrigerant is, for example, carbon dioxide, R410A, or R22.

  The compressor discharges the compressed high-temperature and high-pressure refrigerant gas from the compression element 2 to fill the inside of the hermetic container 1, and passes the gap between the stator 5 and the rotor 6 of the motor 3 through the motor. 3 is cooled, and then discharged from the discharge pipe 13 provided on the upper side of the motor 3 to the outside.

  An oil reservoir 9 in which lubricating oil is stored is formed in the lower portion of the high-pressure region in the closed container 1. This lubricating oil moves from the oil reservoir portion 9 through an oil passage (not shown) provided in the shaft 12 to a sliding portion such as the bearing of the compression element 2 or the motor 3. Lubricate the sliding part. This lubricating oil is, for example, a polyalkylene glycol oil (such as polyethylene glycol or polypropylene glycol), an ether oil, an ester oil, or a mineral oil. The oil passage is, for example, a spiral groove provided on the outer peripheral surface of the shaft 12 or a hole provided in the shaft 12.

  The compression element 2 includes a cylinder 21 that is attached to the inner surface of the sealed container 1, and an upper end plate member 50 and a lower end plate member 60 that are attached to upper and lower open ends of the cylinder 21. Prepare. A cylinder chamber 22 is formed by the cylinder 21, the upper end plate member 50, and the lower end plate member 60.

  The upper end plate member 50 includes a disk-shaped main body 51 and a boss 52 provided upward in the center of the main body 51. The main body 51 and the boss 52 are inserted through the shaft 12.

  The main body 51 is provided with a discharge port 51 a communicating with the cylinder chamber 22. A discharge valve 31 is attached to the main body 51 so as to be located on the opposite side of the main body 51 from the cylinder 21. The discharge valve 31 is, for example, a reed valve, and opens and closes the discharge port 51a.

  A cup-type muffler cover 40 is attached to the main body 51 so as to cover the discharge valve 31 on the side opposite to the cylinder 21. The muffler cover 40 is fixed to the main body 51 by a fixing member 35 (such as a bolt). The muffler cover 40 is inserted through the boss portion 52.

  A muffler chamber 42 is formed by the muffler cover 40 and the upper end plate member 50. The muffler chamber 42 and the cylinder chamber 22 communicate with each other via the discharge port 51a.

  The muffler cover 40 has a hole 43. The hole 43 communicates the muffler chamber 42 with the outside of the muffler cover 40.

  The lower end plate member 60 includes a disk-shaped main body portion 61 and a boss portion 62 provided downward in the center of the main body portion 61. The main body 61 and the boss 62 are inserted through the shaft 12.

  In short, one end of the shaft 12 is supported by the upper end plate member 50 and the lower end plate member 60. That is, the shaft 12 is cantilevered. One end portion (support end side) of the shaft 12 enters the cylinder chamber 22.

  An eccentric pin 26 is provided on the support end side of the shaft 12 so as to be positioned in the cylinder chamber 22 on the compression element 2 side. The eccentric pin 26 is fitted to the roller 27. The roller 27 is disposed so as to be able to revolve in the cylinder chamber 22, and performs a compression action by the revolving motion of the roller 27.

  Next, the compression action of the cylinder chamber 22 will be described.

  As shown in FIG. 2, the cylinder chamber 22 is partitioned by a blade 28 provided integrally with the roller 27. That is, the chamber on the right side of the blade 28 has the suction pipe 11 opened on the inner surface of the cylinder chamber 22 to form a suction chamber (low pressure chamber) 22a. On the other hand, in the chamber on the left side of the blade 28, the discharge port 51a (shown in FIG. 1) opens on the inner surface of the cylinder chamber 22 to form a discharge chamber (high pressure chamber) 22b.

  Semi-cylindrical bushes 25, 25 are in close contact with both surfaces of the blade 28 for sealing. The blade 28 and the bushes 25, 25 are lubricated with the lubricating oil.

  Then, the eccentric pin 26 rotates eccentrically with the shaft 12, and the roller 27 fitted to the eccentric pin 26 contacts the outer peripheral surface of the roller 27 with the inner peripheral surface of the cylinder chamber 22, Revolve.

  As the roller 27 revolves in the cylinder chamber 22, the blade 28 advances and retreats with both side surfaces of the blade 28 being held by the bushes 25, 25. Then, a low-pressure refrigerant gas is sucked into the suction chamber 22a from the suction pipe 11, compressed in the discharge chamber 22b to a high pressure, and then a high-pressure refrigerant gas is supplied from the discharge port 51a (shown in FIG. 1). Discharge.

  Thereafter, as shown in FIG. 1, the refrigerant gas discharged from the discharge port 51 a is discharged to the outside of the muffler cover 40 via the muffler chamber 42.

  As shown in FIGS. 1 and 3, the motor 3 includes the rotor 6 and the stator 5 disposed on the radially outer side of the rotor 6 via an air gap.

  The rotor 6 includes a rotor body 610 and a magnet 620 embedded in the rotor body 610. The rotor body 610 has a cylindrical shape, and is made of, for example, laminated electromagnetic steel plates. The shaft 12 is attached to the central hole of the rotor body 610. The magnet 620 is a flat permanent magnet. The six magnets 620 are arranged at center angles at equal intervals in the circumferential direction of the rotor body 610.

  The stator 5 includes a stator core 510, two insulators 530 and 530 assembled on both end surfaces in the axial direction of the stator core 510 (hereinafter referred to as upper and lower end surfaces), the stator core 510 and the two insulators 530, 530 and a coil 520 wound together. In FIG. 3, the coil 520 is partially omitted, and the insulator 530 is omitted.

  The stator core 510 is composed of a plurality of laminated steel plates, and is fitted into the sealed container 1 by press fitting or shrink fitting. The stator core 510 has an annular portion 511 and nine teeth 512 that protrude radially inward from the inner peripheral surface of the annular portion 511 and are arranged at equal intervals in the circumferential direction.

  The coil 520 is a so-called concentrated winding that is wound around each of the teeth 512 and is not wound around the plurality of teeth 512. The motor 3 has a so-called 6 pole 9 slot. The rotor 6 is rotated together with the shaft 12 by an electromagnetic force generated in the stator 5 by passing a current through the coil 520.

  The insulator 530 is sandwiched between the coil 520 and the stator core 510 and electrically insulates the coil 520 and the stator core 510. The insulator 530 is formed so as to correspond to the shape of the end face of the stator core 510.

  The insulator 530 has a peripheral wall portion 531 disposed on the radially outer side of the coil 520 when viewed from the direction of the rotation axis 12 a of the shaft 12. For example, the peripheral wall portion 531 is formed in an annular shape having cuts at regular intervals in the circumferential direction.

  In the upper and lower insulators 530 and 530, for example, the length of the peripheral wall portion 531 is different. That is, the length of the peripheral wall portion 531 of the lower insulator 530 on the upstream side of the refrigerant gas flow is made longer than the length of the peripheral wall portion 531 of the upper insulator 530 on the downstream side of the refrigerant gas flow. The gas is introduced into an air gap between the stator 5 and the rotor 6 and a space between the adjacent coils 520 and 520.

  The insulator 530 is made of a heat-resistant resin material such as liquid crystal polymer (LCP), polybutylene terephthalate (PBT), polyphenylene sulfide (PPS), polyimide, or polyester.

  As shown in FIGS. 1, 4A, and 4B, the stator core 510 and the upper and lower insulators 530 and 530 are provided with an erroneous assembly prevention mechanism G1. 4A shows the upper end surface side of the stator core 510, and FIG. 4B shows the lower end surface side of the stator core 510.

  This erroneous assembly prevention mechanism G1 prevents erroneous assembly of the upper and lower insulators 530, 530 with respect to the upper and lower end surfaces of the stator core 510 and erroneous assembly of the respective insulators 530 with respect to the circumferential positions of the respective end surfaces of the stator core 510. .

  The erroneous assembly prevention mechanism G1 includes a plurality of locking holes 513 provided in the stator core 510, and a plurality of locking claws provided in the insulator 530 while being locked in each of the plurality of locking holes 513. 533.

  The locking claws 533 and the locking holes 513 are each three, and the shapes of all the locking claws 533 are different from each other, and the shapes of all the locking holes 513 are the respective locking claws 533. They are different from each other according to the shape of the. 4A and 4B, for the sake of clarity, the shapes of the locking claws 533 and the locking holes 513 are shown as large, medium, and small squares having different sizes when viewed from the axial direction of the stator core 510. Yes.

  Specifically, as shown in FIGS. 4A and 4B, the locking hole 513 of the stator core 510 is formed to penetrate from the upper end surface to the lower end surface. That is, the disposition of the irregularly shaped locking holes 513 on the upper end surface of the stator core 510 and the disposition of the irregularly shaped locking holes 513 on the lower end surface of the stator core 510 are positions reflected in the mirror.

  In addition, the disposition of the irregularly shaped locking claws 533 of the upper insulator 530 and the disposition of the irregularly shaped locking claws 533 of the lower insulator 530 are positions reflected in the mirror.

  The three locking claws 533 have a so-called equal pitch in which the center angles between the adjacent locking claws 533 and 533 are the same, but the three locking claws 533 are adjacent to each other. A so-called unequal pitch in which at least one of the central angles between the claws 533 and 533 is different from the other central angles may be used. Although not described, the same applies to the three locking holes 513.

  Next, the assembly of the stator 5 will be described.

  First, as shown in FIG. 4A, the upper insulator 530 is assembled to the upper end surface of the stator core 510, and the lower insulator 530 is assembled to the lower end surface of the stator core 510 as shown in FIG. 4B. At this time, the upper insulator 530 and the lower insulator 530 are different from each other in the arrangement of the deformed locking claws 533, so that the upper and lower insulators 530 are not mistakenly assembled to the upper and lower end surfaces of the stator core 510. . Thereafter, both the stator core 510 and the insulator 530 are wound by the coil 520.

  According to the motor having the above-described configuration, the stator core 510 and the two insulators 530 and 530 include the wrong assembly of the two insulators 530 and 530 with respect to the both end surfaces of the stator core 510 and the end surfaces of the stator core 510. Since an incorrect assembly prevention mechanism G1 for preventing the incorrect assembly of the respective insulators 530 with respect to the circumferential position is provided, when the insulator 530 is assembled to the stator core 510, the incorrect assembly of the insulator 530 with respect to the stator core 510 is performed. Can be prevented.

  Here, when the stator core 510 is press-fitted into the sealed container 1 and attached, in order to prevent peeling of the steel plates on which the stator core 510 is laminated, in consideration of the laminating direction and the caulking direction of the steel plates of the stator core 510, It is necessary to determine the insertion direction of the stator core 510. That is, the positions of the both end faces of the stator core 510 with respect to the closed container 1 are fixed.

  The positions of the two insulators 530 and 530 relative to the sealed container 1 are fixed in consideration of the direction of the refrigerant gas flow discharged from the compression element 2 and the like. That is, the length of the peripheral wall portion 531 of the insulator 530 on the upstream side of the refrigerant gas flow is made longer than the length of the peripheral wall portion 531 of the insulator 530 on the downstream side of the refrigerant gas flow, The air is guided to the air gap between the stator 5 and the rotor 6 and the space between the adjacent coils 520 and 520.

  For this reason, it is necessary to prevent erroneous assembly of the two insulators 530 and 530 with respect to the both end faces of the stator core 510.

  On the other hand, when the insulator 530 is assembled to the end face of the stator core 510 regardless of the circumferential position of the end face, a relative positional shift occurs between the insulator 530 and the end face of the stator core 510, and When the coil 520 is wound around the insulator 530 and the stator core 510, there is a defect that the coil 520 is damaged.

  For this reason, it is necessary to prevent erroneous assembly of the insulators 530 with respect to the circumferential positions of the end surfaces of the stator core 510.

  The misassembly prevention mechanism G1 includes a plurality of engagement holes 513 provided in the stator core 510, and a plurality of engagements provided in the insulator 530 while being engaged with the plurality of engagement holes 513, respectively. Since the pawl 533 is provided, the misassembly prevention mechanism G1 can be configured simply.

  Further, each of the locking claws 533 and the locking holes 513 has three, the shapes of all the locking claws 533 are different from each other, and the shapes of all the locking holes 513 are Since they differ from each other in accordance with the shape of the claw 533, it is possible to prevent erroneous assembly of the insulator 530 with respect to the stator core 510 with a simple configuration.

  Moreover, according to the compressor of the said structure, since the said motor 3 is provided, the said motor 3 has good quality and can implement | achieve a good quality compressor.

  In the first embodiment, four or more locking claws 533 and four locking holes 513 may be provided.

(Second Embodiment)
FIG. 5 shows a second embodiment of the compressor of the present invention. The difference from the first embodiment will be described. In the second embodiment, the misassembly prevention mechanism G2 is different. In this erroneous assembly prevention mechanism G2, the locking holes 513 and the locking claws 533 are provided at unequal pitches.

  That is, the central angles (α, β, γ) between the adjacent locking claws 533, 533 are different from each other, and the central angles (α, β, γ) between the adjacent locking holes 513, 513 are different. , Corresponding to the central angles (α, β, γ) between the adjacent locking claws 533, 533 are different from each other.

  All the locking holes 513 have the same shape, and all the locking claws 533 have the same shape. In FIG. 5, for easy understanding, the shapes of the locking claws 533 and the locking holes 513 are shown by squares having the same size when viewed from the axial direction of the stator core 510.

  In FIG. 5, the upper end surface side of the stator core 510 is shown and the lower end surface side of the stator core 510 is omitted, but the lower end surface of the stator core 510 and the shape of the lower insulator 530 can be described in the same manner as in the first embodiment.

  That is, the arrangement of the same-shaped locking holes 513 on the upper end surface of the stator core 510 and the arrangement of the same-shaped locking holes 513 on the lower end surface of the stator core 510 are mirror images of each other. Further, the arrangement of the same-shaped locking claws 533 of the upper insulator 530 and the arrangement of the same-shaped locking claws 533 of the lower insulator 530 are positions reflected in the mirror.

  Next, the assembly of the stator core 510 and the upper and lower insulators 530 and 530 will be described. The upper insulator 530 is assembled to the upper end surface of the stator core 510, and the lower insulator 530 is assembled to the lower end surface of the stator core 510. At this time, since the upper insulator 530 and the lower insulator 530 are different in the arrangement of the locking claws 533 having the same shape, the upper and lower insulators 530 are not erroneously assembled to the upper and lower end surfaces of the stator core 510. .

  In the compressor according to the second embodiment, erroneous assembly of the insulator 530 with respect to the stator core 510 can be prevented with a simple configuration.

  In the second embodiment, the shapes of the locking claws 533 are all the same, but at least one of the locking claws 533 may be different from the others. Although not described, the same applies to the three locking holes 513.

( Reference example )
FIG. 6 shows a reference example of the compressor of the present invention. The difference from the first embodiment will be described. In this reference example , the misassembly prevention mechanism G3 is different. This misassembly prevention mechanism G3 includes a stator mark portion 514 provided on the stator core 510, an insulator mark portion 534 provided at a position corresponding to the stator mark portion 514 of the insulator 530, and one piece provided on the stator core 510. There are two locking holes 513 and one locking claw 533 which is locked in the locking hole 513 and provided in the insulator 530.

  The stator mark part 514 and the insulator mark part 534 are formed in, for example, irregularities. In FIG. 6, for easy understanding, the shapes of the locking claws 533 and the locking holes 513 are shown as squares when viewed from the axial direction of the stator core 510.

  In FIG. 6, the upper end surface side of the stator core 510 is shown, and the lower end surface side of the stator core 510 is omitted. However, the shape of the lower end surface of the stator core 510 and the lower insulator 530 can be described in the same manner as in the first embodiment.

  That is, the arrangement of the locking holes 513 and the stator mark portions 514 on the upper end surface of the stator core 510 and the arrangement of the locking holes 513 and the stator mark portions 514 on the lower end surface of the stator core 510 are mutually mirrored. It will be the position reflected in. Further, the arrangement of the locking claws 533 and the insulator mark portions 534 of the upper insulator 530 and the arrangement of the locking claws 533 and the insulator mark portions 534 of the lower insulator 530 are positions reflected in the mirror. It becomes.

  Next, the assembly of the stator core 510 and the upper and lower insulators 530 and 530 will be described. The upper insulator 530 is assembled to the upper end surface of the stator core 510 while aligning the insulator mark portion 534 with the stator mark portion 514. The lower insulator 530 is assembled to the lower end surface of the stator core 510 while the insulator mark portion 534 is aligned with the stator mark portion 514.

  At this time, the upper insulator 530 and the lower insulator 530 are different in the arrangement of the locking claws 533 and the insulator mark portion 534. Therefore, the upper and lower insulators 530 are mistakenly attached to the upper and lower end surfaces of the stator core 510. There is no assembly.

In the compressor of this reference example , it is possible to prevent erroneous assembly of the insulator 530 with respect to the stator core 510 with a simple configuration.

In this reference example , a plurality of the locking claws 533 and the locking holes 513 may be provided, and either an equal pitch or an unequal pitch may be used. The shapes of the locking claws 533 and the locking holes 513 may all be the same, or at least one may be different from the other. For example, as indicated by an imaginary line, a locking claw 533 and a locking hole 513 indicated by a large square may be provided separately.

  In addition, this invention is not limited to the above-mentioned embodiment. For example, the compression element 2 may be a rotary type in which a roller and a blade are separate bodies. As the compression element 2, a scroll type or a reciprocating type may be used in addition to the rotary type.

  The compression element 2 may be a two-cylinder type having two cylinder chambers. The coil 520 may be a so-called distributed winding wound around the plurality of teeth 512. Further, the compression element 2 may be disposed above and the motor 3 may be disposed below.

  Further, the insulator 530 may be provided with a locking hole, and the stator core 510 may be provided with a locking claw that is locked in the locking hole.

It is a longitudinal section showing a 1st embodiment of a compressor of the present invention. It is a top view of the principal part of a compressor. It is a cross-sectional view near the motor of the compressor. It is a simplified top view which shows the upper end surface side of a stator core. It is a simplified bottom view which shows the lower end surface side of a stator core. It is a simplified top view which shows 2nd Embodiment of the compressor of this invention and shows the upper end surface side of a stator core. It is a simplified top view which shows the reference example of the compressor of this invention, and shows the upper end surface side of a stator core.

DESCRIPTION OF SYMBOLS 1 Airtight container 2 Compression element 3 Motor 5 Stator 510 Stator core 513 Locking hole 514 Stator mark part 520 Coil 530 Insulator 531 Perimeter wall part 533 Locking claw 534 Insulator mark part 6 Rotor 12 Shaft 21 Cylinder G1, G2, G3 Misassembly prevention mechanism

Claims (3)

A rotor (6) and a stator (5) disposed radially outside the rotor (6);
The stator (5) is wound together around the stator core (510), the insulator (530) assembled to both end surfaces of the stator core (510) in the axial direction, the stator core (510), and the insulator (530). Coil (520),
The stator core (510) and the insulator (530) include the incorrect assembly of the insulator (530) with respect to the both end faces of the stator core (510), and the respective positions with respect to the circumferential positions of the end faces of the stator core (510). An erroneous assembly prevention mechanism (G1 ) for preventing an erroneous assembly of the insulator (530) is provided ,
The erroneous assembly prevention mechanism (G1)
A plurality of locking holes (513) provided in the stator core (510);
A plurality of locking claws (533) provided in the insulator (530) and locked in each of the plurality of locking holes (513);
Have
There are at least three of the locking claws (533) and the locking holes (513),
The shapes of all the locking claws (533) are different from each other,
The motor characterized in that the shapes of all the locking holes (513) are different from each other corresponding to the shapes of the respective locking claws (533) . A rotor (6) and a stator (5) disposed radially outside the rotor (6);
The stator (5) is wound together around the stator core (510), the insulator (530) assembled to both end surfaces of the stator core (510) in the axial direction, the stator core (510), and the insulator (530). Coil (520),
The stator core (510) and the insulator (530) include the incorrect assembly of the insulator (530) with respect to the both end faces of the stator core (510), and the respective positions with respect to the circumferential positions of the end faces of the stator core (510). An incorrect assembly prevention mechanism (G2) for preventing an incorrect assembly of the insulator (530) is provided ,
The erroneous assembly prevention mechanism (G2)
A plurality of locking holes (513) provided in the stator core (510);
A plurality of locking claws (533) provided in the insulator (530) and locked in each of the plurality of locking holes (513);
Have
The central angles between the adjacent locking claws (533, 533) are different from each other,
The motor characterized in that the central angle between the adjacent locking holes (513, 513) is different from each other corresponding to the central angle between the adjacent locking claws (533, 533) . A sealed container (1);
A compression element (2) arranged in the sealed container (1);
A motor (3) according to claim 1 or 2 , characterized in that it is arranged in the closed container (1) and drives the compression element (2) via a shaft (12). Compressor.

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