Electric motor, compressor and device

Abstract

A fixing protrusion (54) is raised from an insulator yoke recess bottom surface (53a), the fixing protrusion (54) is formed by a fixing protrusion root portion (54X) located in an insulator yoke recess (53) and a fixing protrusion protruding portion (54Y) protruding from the insulator yoke recess (53), and an annular groove is formed around the fixing protrusion root portion (54X) by the insulator yoke recess (53). The insulator (50) is fixed to the stator (30) by inserting the fixing protrusion (54Y) into the fixing recess (34), thereby preventing the insulator (50) from floating from the stator (30) due to the entry of grinding chips between the insulator (50) and the stator (30) during the assembly of the motor (14), and preventing the occurrence of defects caused by the entry of grinding chips into the gap between the stator (30) and the rotor (20) after the assembly of the motor (14). Thus, it is possible to provide a high-efficiency and low-vibration motor (14), a compressor (10) using the motor (14), and a device using the compressor (10).

Description

Technical Field

[0001] The present invention relates to an electric motor, a compressor using the electric motor, and an apparatus using the compressor. Background Art

[0002] The electric motor described in Patent Document 1 reduces the influence on magnetic properties by providing fitting holes in the rear yoke portion of the stator, and installs the insulator on the stator by fitting the protrusions provided on the insulator into the holes of the rear yoke. When winding the coil around the insulator, for the purpose of suppressing the reduction of the winding space due to the rotation of the insulator, the insulator is locked to the stator at the portions where the both end faces of the stator and the insulator are separated from the fitting holes of the rear yoke portion.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2012-95492 Summary of the Invention

[0006] Problems to be Solved by the Invention

[0007] However, as in the case of the electric motor described in Patent Document 1, when the protrusions of the insulator are accurately fitted into the fitting holes of the stator, the protrusions of the insulator may be ground by the stator. As a result, grinding chips accumulate at the root portions of the protrusions provided on the insulator, and the insulator may float from the end face of the stator.

[0008] Therefore, an object of the present invention is to provide an efficient and low-vibration electric motor, a compressor using the electric motor, and an apparatus using the compressor, in which, during the assembly of the electric motor, the insulator does not float from the stator due to grinding chips entering between the insulator and the stator, and after the assembly of the modified motor, no malfunction occurs due to grinding chips entering the gap between the stator and the rotor.

[0009] Means for Solving the Problems

[0010] The motor 14 of the present invention described in Technical Solution 1 has: a rotor 20 formed by laminating rotor iron core sheets, with a plurality of permanent magnets arranged around a rotating shaft 4; a stator 30 formed by laminating stator iron core sheets, arranged with a gap from the above-mentioned rotor 20; and an insulator 50 arranged on both end faces of the stator 30 in the lamination direction. The stator 30 has an annular stator yoke 31 centered on the rotating shaft 4, a plurality of stator teeth 32 extending from the stator yoke 31 to the rotor 20, and slots 33 formed between the stator teeth 32. A winding 41 is arranged in the slots 33. The stator teeth 32 have a stator tooth base portion 32A around which the winding 41 is wound and a stator tooth front end portion 32B forming an inner peripheral surface 32S of the stator tooth facing the rotor 20. The insulator 50 has an insulator yoke portion 51 located on the stator yoke 31, an insulator tooth base portion 52A located on the stator tooth base portion 32A, an insulator tooth front end portion 52B located on the stator tooth front end portion 32B, and a fixing protrusion portion 54 provided on the insulator yoke portion 51. The stator yoke 31 has a fixing recess 34. The motor 14 is characterized in that by raising the fixing protrusion portion 54 from the bottom surface 53a of the insulator yoke recess 53 formed in the insulator yoke portion 51, the fixing protrusion portion 54 is formed by a fixing protrusion root portion 54X located in the insulator yoke recess 53 and a fixing protrusion protruding portion 54Y protruding from the insulator yoke recess 53. Around the fixing protrusion root portion 54X, an annular groove is formed by the insulator yoke recess 53. By inserting the fixing protrusion protruding portion 54Y into the fixing recess 34, the insulator 50 is fixed to the stator 30.

[0011] The present invention described in Technical Solution 2 is characterized in that in the motor 14 described in Technical Solution 1, the fixing protrusion protruding portion 54Y has a tapered portion 54Ya with a decreasing cross-sectional area toward the front end side and a straight portion 54Yb with an unchanged cross-sectional area. The straight portion 54Yb is connected to the fixing protrusion root portion 54X, and the tapered portion 54Ya is formed to be longer than the straight portion 54Yb.

[0012] The present invention described in Technical Solution 3 is characterized in that in the motor 14 described in Technical Solution 2, the length of the straight portion 54Yb is formed to be equal to or greater than the thickness of one stator iron core sheet.

[0013] The present invention described in Technical Solution 4 is characterized in that in the motor 14 described in Technical Solution 1, the fixing protrusion portion 54 is divided into a plurality of parts.

[0014] The feature of the present invention described in Technical Solution 5 is that, in the motor 14 described in Technical Solution 1, with the protruding portion 54Y of the fixing protrusion inserted into the fixing recess 34, a gap L greater than or equal to the thickness of one stator iron core sheet is formed between the protruding portion 54Y of the fixing protrusion and the bottom surface 34a of the fixing recess 34 of the fixing recess.

[0015] The feature of the present invention described in Technical Solution 6 is that, in the motor 14 described in Technical Solution 1, the bottom surface 53a of the insulator yoke recess is a flat surface, and the outer peripheral portion 53b and the inner peripheral portion 53c of the bottom surface of the insulator yoke recess are rounded.

[0016] The feature of the present invention described in Technical Solution 7 is that, in the motor 14 described in Technical Solution 1, when the radial dimension of the opening surface side of the annular groove is set as a and the depth dimension to the bottom surface 53a of the insulator yoke recess is set as b, a:b is formed within the range of 1:1 to 1:20.

[0017] The feature of the present invention described in Technical Solution 8 is that, in the motor 14 described in Technical Solution 1, the stator 30 divided into a plurality of parts for each stator tooth 32 is arranged in a circular ring shape, the insulator 50 is arranged for each stator 30, a stator tooth inner peripheral tapered surface 32Sa where the air gap gradually expands as going towards the end is formed on both sides of the inner peripheral surface 32S of the stator tooth, and a locking protrusion 55 that abuts against the stator tooth inner peripheral tapered surface 32Sa is formed at the front end portion 52B of the insulator tooth.

[0018] The motor 14 of the present invention described in Technical Solution 9 has: a rotor 20 formed by laminating rotor iron cores, with a plurality of permanent magnets arranged around a rotating shaft 4; a stator 30 formed by laminating stator iron cores, arranged with a gap from the above-mentioned rotor 20; and an insulator 50 arranged on both end faces in the lamination direction of the above-mentioned stator 30. The above-mentioned stator 30 has an annular stator yoke 31 centered on the above-mentioned rotating shaft 4, a plurality of stator teeth 32 extending from the above-mentioned stator yoke 31 to the above-mentioned rotor 20, and slots 33 formed between the above-mentioned stator teeth 32. A winding 41 is arranged in the above-mentioned slots 33. The above-mentioned stator teeth 32 have a stator tooth base 32A around which the above-mentioned winding 41 is wound and a stator tooth tip 32B forming a stator tooth inner peripheral surface 32S opposite to the above-mentioned rotor 20. The above-mentioned insulator 50 has: an insulator yoke portion 51 located on the above-mentioned stator yoke 31; an insulator tooth base 52A located on the above-mentioned stator tooth base 32A; an insulator tooth tip 52B located on the above-mentioned stator tooth tip 32B; and a fixing protrusion 54 provided on the above-mentioned insulator yoke portion 51. The above-mentioned stator 30 divided into a plurality of parts for each of the above-mentioned stator teeth 32 is arranged in a circular ring shape, and the above-mentioned insulator 50 is arranged for each of the above-mentioned stators 30. The above-mentioned stator yoke 31 has a fixing recess 34, and the above-mentioned insulator 50 is fixed to the above-mentioned stator 30 by inserting the above-mentioned fixing protrusion 54 into the above-mentioned fixing recess 34. The motor is characterized in that stator tooth inner peripheral tapered surfaces 32Sa with the air gap gradually expanding towards the ends are formed on both side portions of the above-mentioned stator tooth inner peripheral surface 32S, and a locking protrusion 55 abutting against the above-mentioned stator tooth inner peripheral tapered surface 32Sa is formed on the above-mentioned insulator tooth tip 52B.

[0019] The compressor 10 of the present invention described in Technical Solution 10 is a compressor 10 using the motor 14 described in Technical Solutions 1 to 9, and is characterized in that a compression mechanism portion 13 is connected to the above-mentioned rotating shaft 4, and the refrigerant is compressed by the above-mentioned compression mechanism portion 13.

[0020] The device of the present invention described in Technical Solution 11 is a device using the compressor 10 described in Technical Solution 10, and is characterized in that the above-mentioned compressor 10, a condenser 17, a pressure reducing device 18, and an evaporator 19 are connected in a circular ring shape through pipes.

[0021] Advantages of the Invention

[0022] According to the present invention, during vibrations such as when inserting the protruding portion of the fixing protrusion into the fixing recess and during the operation of the motor, the grinding chips generated by the protruding portion of the fixing protrusion being ground by the fixing recess can be left in the annular groove.

[0023] In addition, according to the present invention, by inserting the fixing protrusion into the fixing recess, the insulator is fixed to the stator, and the locking protrusion abuts against the inner peripheral conical surface of the stator tooth. Therefore, especially when winding the winding around the stator, the insulator can be reliably prevented from shifting from the stator. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. is a structural diagram of a compressor of a motor using an embodiment of the present invention and a refrigeration device using the compressor.

[0025] Figure 2 FIG. is a structural diagram of a main part of the motor of this embodiment.

[0026] Figure 3 FIG. is a perspective view showing a stator and an insulator constituting the motor of this embodiment.

[0027] Figure 4 FIG. is a view showing the stator and the insulator.

[0028] Figure 5 FIG. is a cross-sectional view showing a fixing protrusion provided on an insulator yoke portion and a fixing recess provided on a stator yoke.

[0029] Figure 6 FIG. is a structural diagram of a scroll compressor of a motor using this embodiment and a refrigeration device using the scroll compressor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] In the motor according to the first embodiment of the present invention, the fixing protrusion stands up from the bottom surface of the insulator yoke recess formed in the insulator yoke portion. The fixing protrusion is formed by a fixing protrusion root portion located in the insulator yoke recess and a fixing protrusion protruding portion protruding from the insulator yoke recess. Around the fixing protrusion root portion, an annular groove is formed by the insulator yoke recess. By inserting the fixing protrusion protruding portion into the fixing recess, the insulator is fixed to the stator. According to this embodiment, when inserting the fixing protrusion protruding portion into the fixing recess and during vibrations such as during the operation of the motor, the grinding chips generated by grinding the fixing protrusion protruding portion by the fixing recess can be left in the annular groove. Therefore, during the assembly of the motor, the insulator will not float from the stator due to grinding chips entering between the insulator and the stator, and after the assembly of the motor, no adverse conditions will occur due to grinding chips entering the gap between the stator and the rotor, and a high-efficiency and low-vibration motor can be realized.

[0031] The second embodiment of the present invention is in the motor of the first embodiment. In the protruding portion of the fixing projection, there is a tapered portion whose cross-sectional area decreases toward the front end side and a straight portion whose cross-sectional area does not change. The straight portion is connected to the root portion of the fixing projection, and the tapered portion is formed to be longer than the straight portion. According to this embodiment, the protruding portion of the fixing projection can be inserted into the fixing recess through the straight portion, and the tapered portion is located within the fixing recess. Thus, due to the elasticity generated by the tapered portion, the vibration resistance is excellent, and the generation of grinding chips can be reduced.

[0032] The third embodiment of the present invention is in the motor of the second embodiment, and the length of the straight portion is formed to be equal to or greater than the thickness of one stator iron core chip. According to this embodiment, the protruding portion of the fixing projection can be reliably inserted into the fixing recess.

[0033] The fourth embodiment of the present invention is in the motor of the first embodiment, and the fixing projection portion is divided into a plurality of parts. According to this embodiment, the elasticity of the fixing projection portion can be further improved, the vibration resistance is excellent, and the generation of grinding chips can be reduced.

[0034] The fifth embodiment of the present invention is in the motor of the first embodiment. In a state where the protruding portion of the fixing projection is inserted into the fixing recess, a gap equal to or greater than the thickness of one stator iron core chip is formed between the protruding portion of the fixing projection and the bottom surface of the fixing recess of the fixing recess. According to this embodiment, the insulator can be reliably fixed to the stator without floating from the stator.

[0035] The sixth embodiment of the present invention is in the motor of the first embodiment. The bottom surface of the insulator yoke recess is a flat surface, and the outer peripheral portion and the inner peripheral portion of the bottom surface of the insulator yoke recess are formed in a rounded shape. According to this embodiment, the manufacturability is excellent, and the generation of grinding chips can be reduced.

[0036] The seventh embodiment of the present invention is in the motor of the first embodiment. When the radial dimension of the opening surface side of the annular groove is set to a and the depth dimension to the bottom surface of the insulator yoke recess is set to b, a:b is formed in the range of 1:1 to 1:20. According to this embodiment, the generated grinding chips can be retained in the annular groove.

[0037] The eighth embodiment of the present invention is a motor according to the first embodiment, in which stators divided into a plurality of parts for each stator tooth are arranged in a circular ring shape, an insulator is arranged for each stator, stator tooth inner peripheral tapered surfaces with an air gap gradually expanding toward the end are formed on both sides of the inner peripheral surface of the stator tooth, and a locking protrusion portion that abuts against the stator tooth inner peripheral tapered surface is formed at the front end of the insulator tooth. According to this embodiment, by inserting the fixing protrusion portion into the fixing recess portion, the insulator is fixed to the stator, and the locking protrusion portion abuts against the stator tooth inner peripheral tapered surface. Therefore, especially when winding the winding around the stator, it is possible to reliably prevent the insulator from shifting from the stator.

[0038] In the motor according to the ninth embodiment of the present invention, stators divided into a plurality of parts for each stator tooth are arranged in a circular ring shape, an insulator is arranged for each stator, a fixing recess portion is provided in the stator yoke, and by inserting the fixing protrusion portion into the fixing recess portion, the insulator is fixed to the stator. Stator tooth inner peripheral tapered surfaces with an air gap gradually expanding toward the end are formed on both sides of the inner peripheral surface of the stator tooth, and a locking protrusion portion that abuts against the stator tooth inner peripheral tapered surface is formed at the front end of the insulator tooth. According to this embodiment, by inserting the fixing protrusion portion into the fixing recess portion, the insulator is fixed to the stator, and the locking protrusion portion abuts against the stator tooth inner peripheral tapered surface. Therefore, especially when winding the winding around the stator, it is possible to reliably prevent the insulator from shifting from the stator.

[0039] The compressor according to the tenth embodiment of the present invention is a compressor using the motor according to any one of the first to ninth embodiments, and a compression mechanism portion is connected to the rotating shaft, and the refrigerant is compressed by the compression mechanism portion. According to this embodiment, a compressor based on low vibration can be realized.

[0040] The device according to the eleventh embodiment of the present invention is a device using the compressor according to the tenth embodiment, and the compressor, the condenser, the decompression device, and the evaporator are connected in a ring shape through pipes. According to this embodiment, it is possible to realize a low-noise and high-efficiency device based on low vibration without reducing the torque.

[0041]

Example

[0042] Hereinafter, a compressor according to an embodiment of the present invention will be described. In addition, the present invention is not limited to the following embodiments.

[0043] Figure 1 It is a structural diagram of a compressor using the motor of this embodiment and a refrigeration device using this compressor. The compressor of this embodiment represents a rotary compressor.

[0044] An intake pipe 2 for sucking refrigerant and a discharge pipe 3 for discharging refrigerant are connected to a sealed container 1. Inside the sealed container 1, a compression mechanism section 13 for compressing the refrigerant sucked from the intake pipe 2 and a motor 14 for driving the compression mechanism section 13 are arranged. The bottom inside the sealed container 1 forms an oil storage section 11.

[0045] The compression mechanism section 13 is composed of a cylinder 13a, a piston 13b, a vane (not shown), a main bearing 13c, and a sub-bearing 13d. The cylinder 13a is fixed to the sealed container 1. The piston 13b is fitted to an eccentric portion 4a of a rotating shaft 4 passing through the inside of the cylinder 13a in a freely rotatable manner. The vane reciprocates in a vane groove following the piston 13b that rotates along the inner wall surface of the cylinder 13a. The main bearing 13c and the sub-bearing 13d seal the upper and lower end surfaces of the cylinder 13a and support the rotating shaft 4.

[0046] The motor 14 is composed of a stator 30 fixed to the sealed container 1 and a rotor 20 arranged on the inner circumference of the stator 30.

[0047] The refrigerant is sucked from the intake pipe 2 into the compression mechanism section 13 and compressed by the compression mechanism section 13. Then, the refrigerant passes through the motor 14 and is discharged from the discharge pipe 3.

[0048] In the refrigeration device of this embodiment, a compressor 10, a condenser 17, a decompression device 18, and an evaporator 19 are connected in a ring shape through pipes. The refrigerant discharged from the discharge pipe 3 is condensed in the condenser 17, the refrigerant condensed by the condenser 17 is decompressed in the decompression device 18, and the refrigerant decompressed by the decompression device 18 is evaporated in the evaporator 19.

[0049] The refrigerant evaporated by the evaporator 19 returns to the compressor 10 via an accumulator 16.

[0050] Figure 1 In the compressor 10 shown, only bearings (main bearing 13c, sub-bearing 13d) bear one end (lower end) side of the rotating shaft 4, so shaft yaw on the other end (upper end) side of the rotating shaft 4 is likely to occur. Therefore, the effect of reducing vibration of the motor 14, which can simultaneously suppress the radial electromagnetic force and the torque unevenness in the rotation direction, i.e., torque ripple, is high.

[0051] Figure 2 It is a structural diagram of the main part of the motor of this embodiment, Figure 2 (a) is a top view in a state where windings are wound, Figure 2 (b) is a top view in a state where no windings are wound, Figure 2 (c) is Figure 2 (a) A - A sectional view, Figure 2 (d) is Figure 2 (b) B - B sectional view.

[0052] Figure 3 is a perspective view showing the stator and insulator of the motor constituting this embodiment, Figure 4 is a view showing the stator and insulator.

[0053] In this embodiment, the rotor 20 is fixed to the rotating shaft 4, and the stator 30 is fixed to the closed container 1 (see Figure 1 ).

[0054] The rotor 20 is formed into a cylindrical shape by laminating rotor iron cores, and a plurality of permanent magnets (not shown) are arranged around the rotating shaft 4.

[0055] The rotor iron core is an electromagnetic steel sheet with a thickness of about 0.3 mm, and the rotor 20 is made of a magnetic material.

[0056] The stator 30 is arranged with a gap from the rotor 20. The stator 30 is formed by laminating stator iron cores in the axial direction of the rotating shaft 4. The stator iron core is an electromagnetic steel sheet with a thickness of about 0.3 mm, and the stator 30 is made of a magnetic material.

[0057] As Figure 3 (a) shows, the stator 30 has: an annular stator yoke 31 centered on the rotating shaft 4 of the rotor 20; a plurality of stator teeth 32 extending from the stator yoke 31 toward the rotor 20; and slots 33 formed between the stator teeth 32. A winding 41 is arranged in the slot 33 ( Figure 2 (a), Figure 2 (c)).

[0058] The stator yoke 31 has a fixing recess 34 ( Figure 3 ).

[0059] The stator tooth 32 has a stator tooth base 32A around which the winding 41 is wound via an insulating material 42 ( Figure 2 (c)), and a stator tooth tip 32B formed at the front end of the stator tooth base 32A. Figure 2 (a), Figure 2 (c)).

[0060] The stator tooth tip 32B forms a stator tooth inner peripheral surface 32S opposite to the rotor outer peripheral surface 20S of the rotor 20.

[0061] The stator tooth tip 32B is formed to protrude more to both sides than the circumferential width T of the stator tooth base 32A. On both sides of the thus-protruding stator tooth inner peripheral surface 32S, a stator tooth inner peripheral conical surface 32Sa is formed where the air gap gradually expands toward the end.

[0062] As Figure 3As shown, the insulator 50 has: an insulator yoke portion 51 located on the stator yoke 31; an insulator tooth base portion 52A located on the stator tooth base portion 32A; an insulator tooth tip portion 52B located on the stator tooth tip portion 32B; and a fixing protrusion portion 54 provided on the insulator yoke portion 51.

[0063] In addition, a locking protrusion portion 55 that abuts against the inner peripheral conical surface 32Sa of the stator tooth is formed on the insulator tooth tip portion 52B.

[0064] The locking protrusion portion 55 is preferably formed on both sides of the insulator tooth tip portion 52B. And the locking protrusion portion 55 is preferably formed with a locking protrusion extension portion 55a that abuts against the side surface 32Ba of the stator tooth tip portion 32B.

[0065] The fixing protrusion portion 54 stands up from the insulator yoke concave portion bottom surface 53a of the insulator yoke concave portion 53 formed in the insulator yoke portion 51.

[0066] The fixing protrusion portion 54 is divided into two. In this way, by dividing the fixing protrusion portion 54 into multiple parts, the elasticity of the fixing protrusion portion 54 can be further improved, and the vibration resistance is excellent, so the generation of grinding chips can be reduced.

[0067] As Figure 4 shown, insulators 50 are arranged on both end faces of the stator 30 in the stacking direction.

[0068] In addition, in this embodiment, the stator 30 divided into multiple parts for each stator tooth 32 is arranged in a circular ring shape.

[0069] As shown in this embodiment, when the stator 30 divided into multiple parts for each stator tooth 32 is arranged in a circular ring shape and the insulator 50 is arranged for each divided stator 30, the insulator 50 is fixed to the stator 30 by inserting the fixing protrusion portion 54 into the fixing concave portion 34, and the locking protrusion portion 55 abuts against the inner peripheral conical surface 32Sa of the stator tooth. Therefore, especially when the winding 41 is wound around the stator 30, the insulator 50 can be reliably prevented from shifting from the stator 30. In addition, the installation of the fixing protrusion portion 54 into the fixing concave portion 34 is preferably performed by press-fitting.

[0070] Figure 5 It is a cross-sectional view showing the fixing protrusion portion provided on the insulator yoke and the fixing concave portion provided on the stator yoke.

[0071] The fixing protrusion portion 54 is formed by a fixing protrusion root portion 54X located inside the insulator yoke concave portion 53 and a fixing protrusion protruding portion 54Y protruding from the insulator yoke concave portion 53.

[0072] A circular groove is formed by the insulator yoke concave portion 53 around the fixing protrusion root portion 54X.

[0073] Figure 5 It shows the state where the insulator 50 is fixed to the stator 30 by inserting the protruding portion 54Y of the fixing protrusion into the fixing recess 34.

[0074] The protruding portion 54Y of the fixing protrusion has a tapered portion 54Ya whose cross-sectional area decreases toward the front end side and a straight portion 54Yb whose cross-sectional area does not change, and is connected to the root portion 54X of the fixing protrusion through the straight portion 54Yb. The tapered portion 54Ya is longer than the straight portion 54Yb.

[0075] The straight portion 54Yb is formed to have a length equal to or greater than the thickness of one stator iron core chip.

[0076] According to this embodiment, the protruding portion 54Y of the fixing protrusion can be inserted into the fixing recess 34 through the straight portion 54Yb, and the tapered portion 54Ya is located within the fixing recess 34. Thus, due to the elasticity generated by the tapered portion 54Ya, the vibration resistance is excellent, and the generation of grinding chips can be reduced.

[0077] In addition, since the length of the straight portion 54Yb is formed to be equal to or greater than the thickness of one stator iron core chip, the protruding portion 54Y of the fixing protrusion can be reliably inserted into the fixing recess 34.

[0078] In the state where the protruding portion 54Y of the fixing protrusion is inserted into the fixing recess 34, a gap L equal to or greater than the thickness of one stator iron core chip is formed between the protruding portion 54Y of the fixing protrusion and the bottom surface 34a of the fixing recess 34 of the fixing recess.

[0079] That is, the protruding portion 54Y of the fixing protrusion is shorter than the depth of the fixing recess 34. Thus, by forming a gap L between the protruding portion 54Y of the fixing protrusion and the bottom surface 34a of the fixing recess 34 of the fixing recess, the insulator 50 can be reliably attached and fixed to the stator 30 without floating from the stator 30.

[0080] When the radial dimension on the opening surface side of the annular groove is set to a and the depth dimension to the bottom surface 53a of the insulator yoke recess is set to b, by setting a:b in the range of 1:1 to 1:20, the generated grinding chips can be retained in the annular groove. In addition, a:b is preferably set in the range of 1:2 to 1:10, and more preferably set in the range of 1:3 to 1:5. By forming the depth dimension b to be equal to or greater than the radial dimension a on the opening surface side, the grinding chips generated by the grinding of the protruding portion 54Y of the fixing protrusion by the fixing recess 34 can be retained in the annular groove. By forming the depth dimension b to be three times or more the radial dimension a on the opening surface side, the root portion 54X of the fixing protrusion can have elasticity.

[0081] Figure 5 (b) showsFigure 5 The circular frame part of (a), Figure 5 (c) represents the corresponding Figure 5 Another embodiment of part (b), Figure 5 (d) represents the corresponding Figure 5 Another embodiment of part (b), Figure 5 (e) represents the corresponding Figure 5 Another embodiment of part (b).

[0082] Figure 5 (b) The bottom surface 53a of the insulator yoke recess is formed into a flat surface, and the outer peripheral portion 53b and the inner peripheral portion 53c of the bottom surface of the insulator yoke recess are formed into rounded shapes.

[0083] Figure 5 (c) The bottom surface 53a of the insulator yoke recess is formed into a flat surface, and the outer peripheral portion 53b and the inner peripheral portion 53c of the bottom surface of the insulator yoke recess are formed into corners.

[0084] Figure 5 (d) The bottom surface 53a of the insulator yoke recess is formed into a flat surface, and the outer peripheral portion 53b and the inner peripheral portion 53c of the bottom surface of the insulator yoke recess are formed into inclined surfaces.

[0085] Figure 5 (e) A diagram showing the bottom surface 53a of the insulator yoke recess formed into a shell-shaped concave surface.

[0086] By forming the bottom surface 53a of the insulator yoke recess into Figure 5 (b) to Figure 5 (e) The shown shapes have excellent manufacturability and can reduce the generation of grinding chips.

[0087] Figure 6 It is a structural diagram of a scroll compressor using the motor of this embodiment and a refrigeration device using the scroll compressor.

[0088] The compressor 10 of this embodiment has a compression mechanism portion 13 for compressing refrigerant gas and a motor 14 for driving the compression mechanism portion 13 in a sealed container 1.

[0089] The inside of the sealed container 1 is divided into one container inner space and another container inner space by the compression mechanism portion 13. And the motor 14 is arranged in the another container inner space.

[0090] In addition, the another container inner space is divided into a compression mechanism side space and an oil storage side space by the motor 14. The oil storage portion 11 is arranged in the oil storage side space.

[0091] The suction pipe 2 and the discharge pipe 3 are fixed to the sealed container 1 by welding. The suction pipe 2 and the discharge pipe 3 are connected to the components constituting the refrigeration cycle outside the sealed container 1. The suction pipe 2 introduces refrigerant gas from outside the sealed container 1, and the discharge pipe 3 discharges refrigerant gas from the inner space of the container to the outside of the sealed container 1.

[0092] The main bearing member 7a is fixed inside the sealed container 1 by welding, shrink fitting, etc., and axially supports the rotating shaft 4. One side of the rotating shaft 4 is axially supported by the main bearing member 7a, and the other side is axially supported by the bearing 7b. The fixed scroll member 13j is bolted to the main bearing member 7a. The orbiting scroll member 13k engaged with the fixed scroll member 13j is sandwiched between the main bearing member 7a and the fixed scroll member 13j. The fixed scroll member 13j and the orbiting scroll member 13k constitute a scroll-type compression mechanism portion 13.

[0093] An autorotation restricting mechanism 9 composed of a cross slip ring or the like is provided between the orbiting scroll member 13k and the main bearing member 7a. The autorotation restricting mechanism 9 prevents the autorotation of the orbiting scroll member 13k and guides it in a manner that allows the orbiting scroll member 13k to perform a circular orbital motion. The orbiting scroll member 13k is eccentrically driven by an eccentric portion 4a provided at the upper end of the rotating shaft 4. By this eccentric drive, the compression chamber formed between the fixed scroll member 13j and the orbiting scroll member 13k moves from the outer periphery of the compression mechanism portion 13 toward the central portion, reducing the volume to perform compression.

[0094] The electric motor 14 has a rotor 20 rotatably disposed around the rotating shaft 4 and a stator 30 disposed with a gap from the rotor 20. In addition, regarding the structure of the electric motor 14, since it is the same as Figure 2 the same, the description thereof is omitted.

[0095] The refrigerant is sucked into the compression mechanism portion 13 from the suction pipe 2 and compressed by the compression mechanism portion 13. After that, the refrigerant is discharged from the discharge pipe 3.

[0096] In the refrigeration device of this embodiment, the compressor 10, the condenser 17, the decompression device 18, and the evaporator 19 are connected in a ring shape by piping. The refrigerant discharged from the discharge pipe 3 is condensed in the condenser 17, the refrigerant condensed by the condenser 17 is decompressed in the decompression device 18, and the refrigerant decompressed by the decompression device 18 is evaporated in the evaporator 19.

[0097] The refrigerant evaporated in the evaporator 19 returns to the compressor 10 from the suction pipe 2.

[0098] Figure 6The compressor 10 shown uses a bearing 7b to support one end (the lower end) of the rotating shaft 4, and a main bearing component 7a to support the other end (the upper end) of the rotating shaft 4. Therefore, shaft yaw is not easily generated, but the vibration from the motor 14 is easily transmitted to the hermetic container 1. Therefore, the effect of reducing the vibration of the motor 14, which can simultaneously suppress the radial electromagnetic force and the torque unevenness in the rotational direction, i.e., torque ripple, is relatively high.

[0099] As Figure 1 and Figure 6 shown, the motor 14 of this embodiment is suitable for a compressor 10 that connects a compression mechanism section 13 to a rotating shaft 4 and compresses a refrigerant through the compression mechanism section 13.

[0100] In addition, in this embodiment, a vertical compressor 10 is used for illustration, but even a horizontal compressor 10 has the same effect and is also suitable for, for example, an in-vehicle compressor. In addition, Figure 1 shows a rotary compressor, and Figure 6 shows a scroll compressor, but it can also be a reciprocating compressor or other compressors.

[0101] In an in-vehicle compressor, particularly low noise is required. Therefore, by using the motor 14 of this embodiment that can achieve high efficiency and low vibration, the effect of low noise achieved by low vibration is high.

[0102] In addition, in a refrigeration device in which a compressor 10 using the motor 14 of this embodiment is connected in a loop through pipes together with a condenser 17, a decompression device 18, and an evaporator 19, low noise and high efficiency based on low vibration can be achieved without reducing the torque.

[0103] As described above, in the motor 14 of the present embodiment, the fixing projection 54 stands up from the bottom surface 53a of the insulator yoke recess 53 formed in the insulator yoke portion 51 of the insulator. The fixing projection 54 is formed by a fixing projection root portion 54X located within the insulator yoke recess 53 and a fixing projection protruding portion 54Y protruding from the insulator yoke recess 53. Further, a ring-shaped groove is formed by the insulator yoke recess 53 around the fixing projection root portion 54X. By inserting the fixing projection protruding portion 54Y into the fixing recess 34, the insulator 50 is fixed to the stator 30. By forming such a structure, when the fixing projection protruding portion 54Y is inserted into the fixing recess 34 or during vibrations such as when the motor 14 is operating, the grinding chips generated by the fixing projection protruding portion 54Y being ground by the fixing recess 34 can be retained in the ring-shaped groove. Therefore, during the assembly of the motor 14, grinding chips will not enter between the insulator 50 and the stator 30, causing the insulator 50 to float from the stator 30. After the motor 14 is assembled, no adverse conditions will occur due to grinding chips entering the gap between the stator 30 and the rotor 20, and a highly efficient and low-vibration motor 14 can be achieved.

[0104] Further, in the motor 14 of the present embodiment, the stator 30 divided into a plurality of parts for each stator tooth 32 is arranged in a circular ring shape, an insulator 50 is arranged for each stator 30, and the fixing recess 34 is provided in the stator yoke 31. By inserting the fixing projection 54 into the fixing recess 34, the insulator 50 is fixed to the stator 30. On both sides of the inner peripheral surface 32S of the stator tooth, a stator tooth inner peripheral tapered surface 32Sa with an air gap gradually expanding towards the end is formed. A locking projection 55 that abuts against the stator tooth inner peripheral tapered surface 32Sa is formed at the front end portion 52B of the insulator tooth, and thus the fixing projection 54 is inserted into the fixing recess 34. Thereby, the insulator 50 is fixed to the stator 30, and the locking projection 55 abuts against the stator tooth inner peripheral tapered surface 32Sa. Therefore, especially when the winding 41 is wound around the stator 30, the insulator 50 can be reliably prevented from shifting from the stator 30.

[0105] Further, in the present embodiment, the case where the stator 30 divided into a plurality of parts for each stator tooth 32 is arranged in a circular ring shape is shown, but the same applies to an integrated stator 30.

[0106] Industrial Applicability

[0107] The compressor of the present invention is useful for devices such as a hot water heating device, an indoor air conditioner, a vehicle-mounted air conditioner, a water heater, a refrigerator, a display cabinet, a cooler, or a refrigerating machine.

[0108] Description of Reference Numerals

[0109] 1 Hermetic container

[0110] 2 Suction pipe

[0111] 3 Discharge pipe

[0112] 4 Rotating shaft

[0113] 4a Eccentric part

[0114] 7a Main bearing component

[0115] 7b Bearing

[0116] 9 Self-rotation limiting mechanism

[0117] 10 Compressor

[0118] 11 Oil storage part

[0119] 13 Compression mechanism part

[0120] 13a Cylinder

[0121] 13b Piston

[0122] 13c Main bearing

[0123] 13d Sub-bearing

[0124] 13j Fixed scroll

[0125] 13k Orbiting scroll

[0126] 14 Motor

[0127] 16 Accumulator

[0128] 17 Condenser

[0129] 18 Pressure reducing device

[0130] 19 Evaporator

[0131] 20 Rotor

[0132] 20S Outer peripheral surface of rotor

[0133] 30 Stator

[0134] 31 Stator yoke

[0135] 32 Stator teeth

[0136] 32A Base part of stator teeth

[0137] 32B Tip part of stator teeth

[0138] 32S Inner peripheral surface of stator teeth

[0139] 32Sa Inner peripheral conical surface of stator teeth

[0140] 33 Slot

[0141] 34 Fixing recess

[0142] 34a Bottom surface of fixing recess

[0143] 41 Winding

[0144] 42 Insulating material

[0145] 50 Insulator

[0146] 51 Insulator yoke

[0147] 52A Insulator tooth base

[0148] 52B Insulator tooth tip

[0149] 53 Insulator yoke recess

[0150] 53a Bottom surface of insulator yoke recess

[0151] 53b Outer peripheral part of bottom surface

[0152] 53c Inner peripheral part of bottom surface

[0153] 54 Fixing protrusion

[0154] 54X Root part of fixing protrusion

[0155] 54Y Protruding part of fixing protrusion

[0156] 54Ya Tapered part

[0157] 54Yb Straight part

[0158] 55 Locking protrusion

[0159] 55a Extension part of locking protrusion

[0160] a Radial dimension on the opening surface side

[0161] b Depth dimension

[0162] L Gap.

Claims

1. A motor, characterized in that, Comprising: A rotor formed by laminating rotor iron core sheets, with a plurality of permanent magnets arranged around a rotating shaft; A stator formed by laminating stator iron core sheets, arranged with a gap from the rotor; and An insulator arranged on both end faces in the lamination direction of the stator, The stator has: An annular stator yoke centered on the rotating shaft; A plurality of stator teeth extending from the stator yoke towards the rotor; and Slots formed between the stator teeth, Windings are arranged in the slots, The stator teeth have: A stator tooth base for winding the windings; and A stator tooth tip portion forming an inner peripheral surface of the stator tooth facing the rotor, The insulator has: An insulator yoke portion located on the stator yoke; An insulator tooth base portion located on the stator tooth base; An insulator tooth tip portion located on the stator tooth tip portion; and A fixing protrusion provided on the insulator yoke portion, There is a fixing recess in the stator yoke, where By making the fixing protrusion stand up from the bottom surface of the insulator yoke recess formed in the insulator yoke portion, the fixing protrusion is formed by a fixing protrusion root portion located in the insulator yoke recess and a fixing protrusion protruding portion protruding from the insulator yoke recess, Around the fixing protrusion root portion, an annular groove is formed by the insulator yoke recess, The insulator is fixed to the stator by inserting the fixing protrusion protruding portion into the fixing recess.

2. The electric motor according to claim 1, characterized in that: On the fixing protrusion protruding portion, there is a tapered portion with a decreasing cross-sectional area towards the front end side and a straight portion with an unchanged cross-sectional area, Connected to the fixing protrusion root portion through the straight portion, The tapered portion is formed longer than the straight portion.

3. The electric motor according to claim 2, characterized in that: The length of the straight portion is formed to be more than the thickness of one stator iron core sheet.

4. The electric motor according to claim 1, characterized in that: The fixing protrusion portion is divided into a plurality of parts.

5. The electric motor according to claim 1, characterized in that: In a state where the fixing protrusion protruding portion is inserted into the fixing recess, a gap of more than the thickness of one stator iron core sheet is formed between the fixing protrusion protruding portion and the bottom surface of the fixing recess of the fixing recess.

6. The electric motor according to claim 1, characterized in that: The bottom surface of the insulator yoke recess is a flat surface, and the outer peripheral portion and the inner peripheral portion of the bottom surface of the insulator yoke recess are formed in a rounded shape.

7. The electric motor according to claim 1, characterized in that: When the radial dimension of the opening surface side of the annular groove is set as a and the depth dimension to the bottom surface of the insulator yoke recess is set as b, a:b is formed in the range of 1:1 to 1:

20.

8. The electric motor according to claim 1, characterized in that: The stator divided into a plurality of parts for each stator tooth is configured in a circular ring shape, The insulator is arranged for each stator, On both sides of the inner peripheral surface of the stator teeth, there are formed inner peripheral tapered surfaces of the stator teeth where the air gap gradually expands towards the end portion. At the front end portion of the insulator teeth, there are formed locking protrusion portions that abut against the inner peripheral tapered surfaces of the stator teeth.

9. A motor, characterized in that, Comprising: A rotor formed by laminating rotor iron core sheets, with a plurality of permanent magnets arranged around a rotating shaft; A stator formed by laminating stator iron core sheets, arranged with a gap from the rotor; and An insulator disposed on both end faces in the lamination direction of the stator, The stator has: An annular stator yoke centered on the rotating shaft; A plurality of stator teeth extending from the stator yoke towards the rotor; and Slots formed between the stator teeth, Windings are disposed in the slots, The stator teeth have: A stator tooth base for winding the windings; and A stator tooth front end portion forming an inner peripheral surface of the stator tooth facing the rotor, The insulator has: An insulator yoke portion located at the stator yoke; An insulator tooth base portion located at the stator tooth base; An insulator tooth front end portion located at the stator tooth front end portion; and A fixing protrusion portion provided on the insulator yoke portion, The stator divided into a plurality of parts for each stator tooth is arranged in a circular ring shape, The insulator is disposed for each stator, There is a fixing recess in the stator yoke, The insulator is fixed to the stator by inserting the fixing protrusion portion into the fixing recess, where On both sides of the inner peripheral surface of the stator teeth, there are formed inner peripheral tapered surfaces of the stator teeth where the air gap gradually expands towards the end portion. At the front end portion of the insulator teeth, there are formed locking protrusion portions that abut against the inner peripheral tapered surfaces of the stator teeth.

10. A compressor, characterized in that: It uses the motor according to any one of claims 1 to 9, A compression mechanism portion is connected to the rotating shaft, And the refrigerant is compressed by the compression mechanism portion.

11. An apparatus, characterized in that: It uses the compressor according to claim 10, The compressor, condenser, decompression device, and evaporator are connected in a circular ring shape by piping.

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