Ring-shaped stator structure and rotating electric machine structure

Abstract

Reduce the assembly time required for the ring-shaped stator structure. [Solution] The annular stator structure 1 comprises an annular stator core 30 having a plurality of protruding magnetic poles 31 protruding along the radial direction, an insulator 20 integrally molded with the annular stator core 30, and a stator core cover 50 coupled to the insulator 20. The insulator 20 has a first insulator connection portion 25 formed radially outward from the protruding magnetic poles 31, along the circumferential direction of the annular stator core 30, and formed to protrude along the axial direction of the annular stator core 30. The stator core cover 50 has an annular side portion 51 extending along the axial direction of the annular stator core 30 and a bottom portion 52 closing one end of the annular side portion 51, and at least a part of the insulator connection portion 25 and at least a part of the annular side portion 51 are coupled.

Description

Technical Field

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[0001] This invention relates to an annular stator structure and a rotating electric machine structure having this annular stator structure.

Background Art

[0002] As a conventional annular stator structure, one described in Patent Document 1 is known. The resolver having the annular stator structure described in this Patent Document 1 is attached to the resolver side bracket of the rotating electric machine so that the axis of rotation of the rotating shaft is common to the axis of the rotating shaft of the rotating electric machine. Further, a cover is attached to this resolver.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in order to attach a cover to the resolver described in Patent Document 1 and further attach the resolver and the cover to the resolver side bracket of the rotating electric machine, it is necessary to couple the cover and the resolver to the resolver side bracket of the rotating electric machine and use screws separate from the resolver to screw the cover and the resolver and the resolver side bracket at three locations, resulting in a problem of a large number of assembly steps.

[0005] This invention has been made to solve such problems and aims to reduce the number of assembly steps of the annular stator structure.

Means for Solving the Problems

[0006] <0‏000033>To solve the above problems, the annular stator structure of the present invention comprises an annular stator core having a plurality of protruding magnetic poles protruding radially, an insulator integrally molded with the annular stator core, and a stator core cover coupled to the insulator. The insulator has an insulator connection portion formed radially outward with respect to the protruding magnetic poles, along the circumferential direction of the annular stator core, and formed to protrude along the axial direction of the annular stator core. The stator core cover has an annular side portion extending along the axial direction of the annular stator core and a bottom portion that closes one end of the annular side portion, and at least a part of the insulator connection portion and at least a part of the annular side portion are coupled.

[0007] Furthermore, a first threaded portion may be formed on at least a part of the insulator connection portion, and a second threaded portion may be formed on at least a part of the ring-shaped side portion, and the first threaded portion and the second threaded portion may be screwed together. Furthermore, at least a portion of the insulator connection and at least a portion of the stator core cover may be joined by ultrasonic welding. Furthermore, the ends of the ring-shaped side portions may be provided with flange portions that protrude radially outward. Furthermore, a solid sealing member may be provided between the ring-shaped side portion or flange portion and the insulator. Furthermore, a flange portion is provided at the end of the ring-shaped side portion so as to protrude radially outward, and a waterproof resin agent may be provided at the contact point between the ring-shaped side portion or the flange portion and the insulator.

[0008] Furthermore, the motor structure of the present invention comprises a motor section having a motor stator, a motor rotor, a motor case housing the motor stator and motor rotor, and an opening formed in the motor case, and a rotation sensor section having the ring-shaped stator structure described above, wherein the ring-shaped stator structure may be provided in the opening and have a structure that closes the opening. [Effects of the Invention]

[0009] The annular stator structure according to this invention comprises an annular stator core, an insulator integrally molded with the annular stator core, and a stator core cover coupled to the insulator. The insulator has an insulator connection portion formed radially outward with respect to the protruding magnetic poles, along the circumferential direction of the annular stator core, and protruding along the axial direction of the annular stator core. The stator core cover has an annular side portion extending along the axial direction of the annular stator core and a bottom portion that closes one end of the annular side portion. Since at least a part of the insulator connection portion and at least a part of the annular side portion are coupled, the assembly man-hours of the annular stator structure can be reduced. [Brief explanation of the drawing]

[0010] [Figure 1] This is a plan view of the ring-shaped stator structure according to Embodiment 1. [Figure 2] This is a right-side cross-sectional view of the ring-shaped stator structure shown in Figure 1, cut along the line A-A'. [Figure 3] Figure 2 shows an enlarged cross-sectional view of the first insulator connection portion and the ring-shaped side portion of region B, indicated by the dashed line. [Figure 4] This is a right-side cross-sectional view of a motor structure to which a resolver having the ring-shaped stator structure shown in Figure 2 is attached. [Figure 5] This is an enlarged cross-sectional view of the contact area between the insulator and the stator core cover of the ring-shaped stator structure according to Embodiment 2. [Figure 6] This is an enlarged cross-sectional view of the contact area between the insulator and the stator core cover in this third embodiment. [Figure 7] This is an enlarged cross-sectional view of the contact area between the insulator and the stator core cover in this fourth embodiment. [Modes for carrying out the invention]

[0011] Embodiment 1. Hereinafter, Embodiment 1 of the present invention will be described with reference to the accompanying drawings. Figure 1 is a plan view of the ring-shaped stator structure according to Embodiment 1. The ring-shaped stator structure 1 is a ring-shaped stator structure for a resolver, and has a ring-shaped stator core formed by laminating electromagnetic steel sheets, and a resin insulator 20 integrally molded to the ring-shaped stator core by insert molding. The insulator 20 has a ring-shaped portion 21 that covers the ring-shaped stator core, a terminal portion 22 in which a plurality of terminal pins connected to stator windings wound around the ring-shaped stator core are disposed inside, and a motor mounting portion 23 that protrudes radially outward from the ring-shaped portion 21. The motor mounting portion 23 has a bolt through hole in the center for bolting the ring-shaped stator structure 1 to the housing of a motor. A stator core cover 50 that covers the ring-shaped stator core is disposed radially inward from the ring-shaped portion 21. The stator core cover 50 is made of a resin material and is circular in shape when viewed from the axial direction of the annular stator structure 1. Note that the annular stator core is covered by the stator core cover 50 and the insulator 20, so the annular stator core is not shown in Figure 1.

[0012] Figure 2 is a right-side cross-sectional view of the annular stator structure 1 shown in Figure 1, cut along the line A-A'. The annular stator core 30 is formed integrally with the insulator 20 and has a plurality of protruding magnetic poles 31 that protrude inward along the radial direction. A stator winding 32 is wound around each protruding magnetic pole 31. The stator winding 32 is connected to each terminal pin 24 arranged in the terminal section 22.

[0013] The insulator 20 has a first insulator connection portion 25 which is formed radially outward from the tip of the protruding magnetic pole 31, along the circumferential direction of the annular stator core 30, and which is formed to protrude along the axial direction of the annular stator core 30 indicated by arrow X.

[0014] The stator core cover 50 extends along the axial direction of the annular stator core 30 indicated by the arrow X and has an annular side surface portion 51 that is annular when viewed along the direction of the arrow X. The inner diameter portion of the annular side surface portion 51 is formed so as to contact the outer diameter portion of the first insulator connection portion 25. Further, the stator core cover 50 has a bottom portion 52 that closes one end portion of the annular side surface portion 51. Furthermore, the stator core cover 50 has a flange portion 53 that protrudes radially outward from the other end portion of the annular side surface portion 51.

[0015] FIG. 3 is an enlarged cross-sectional view of the first insulator connection portion 25 and the annular side surface portion 51 of the region B indicated by the broken line in FIG. 2. Note that this FIG. 3 is an enlarged cross-sectional view showing a part of the first insulator connection portion 25 and the annular side surface portion 51, and the configurations of the first insulator connection portion 25 and the annular side surface portion 51 are the same as this over the entire circumference in the circumferential direction. A female screw portion 54 is formed in the inner diameter portion of the annular side surface portion 51. A male screw portion 26 is formed in the outer diameter portion of the first insulator connection portion 25. The female screw portion 54 of the annular side surface portion 51 is screwed into the male screw portion 26 of the first insulator connection portion 25, and thereby the stator core cover 50 is coupled to the insulator 20.

[0016] Next, a method for assembling the annular stator structure 1 will be described with reference to FIGS. 2 and 3. When assembling the annular stator structure 1, the stator winding 32 is wound around the protruding poles 31 of the annular stator core 30 integrally formed with the insulator 20 by insert molding. Also, the stator winding 32 is appropriately connected to each terminal pin 24. Further, a well-known rotor and a well-known rotor rotating shaft fixed to the rotor are provided inside the annular stator core 30 in the radial direction (not shown).

[0017] When attaching the stator core cover 50 to the insulator 20, an operator brings the inner diameter portion of the annular side surface portion 51 of the stator core cover 50 into contact with the outer diameter portion of the first insulator connection portion 25 of the insulator 20. Next, the operator rotates the stator core cover 50 by hand to screw the female screw portion 54 of the annular side surface portion 51 onto the male screw portion 26 of the first insulator connection portion 25, thereby easily fixing the stator core cover 50 to the insulator 20.

[0018] Also, when it becomes necessary to remove the stator core cover 50, the operator rotates the stator core cover 50 by hand to unscrew the female screw portion 54 of the annular side surface portion 51 from the male screw portion 26 of the first insulator connection portion 25, thereby easily removing the stator core cover 50 from the insulator 20.

[0019] In a conventional annular stator structure, in order to attach the stator core cover to the insulator, the stator core cover was fastened to the insulator with a separate metal screw, bolt, etc. from the stator core cover, resulting in an increase in the number of working hours, the need for a fastening tool for fastening, and an increase in the number of parts of the annular stator structure.

[0020] On the other hand, the annular stator structure 1 of the first embodiment can easily attach the stator core cover 50 to the insulator 20 by screwing the female screw portion 54 of the annular side surface portion 51 onto the male screw portion 26 of the first insulator connection portion 25. Therefore, the annular stator structure 1 of the first embodiment has the advantages of reducing the number of working hours for assembling the annular stator structure 1, eliminating the need for a fastening tool, and further reducing the number of parts of the annular stator structure 1, and as a result, has the advantage of reducing the manufacturing cost of the annular stator structure 1.

[0021] Furthermore, in conventional ring-shaped stator structures, removing the stator core cover required using a fastening tool to release the fastenings with metal screws or bolts. On the other hand, in the ring-shaped stator structure 1 of this embodiment 1, the worker can rotate the stator core cover 50 by hand to release the screw connection between the female threaded portion 54 of the ring-shaped side portion 51 and the male threaded portion 26 of the first insulator connection portion 25, thus eliminating the need for a fastening tool.

[0022] Next, a method for attaching the ring-shaped stator structure 1 to a motor as a resolver ring-shaped stator structure will be described. When attaching the ring-shaped stator structure 1 to a motor that constitutes a rotating electric machine, with respect to the dashed line C-C' shown in Figure 2, the side on which the stator core cover 50 is provided is the outside of the motor, and the side on which the stator core cover 50 is not provided is the inside of the motor.

[0023] Figure 4 is a right-side cross-sectional view of a motor structure to which a resolver having the ring-shaped stator structure 1 shown in Figure 2 is attached. The motor structure 10 has a resolver 70 having the ring-shaped stator structure 1 and a motor 80, with the resolver 70 attached to one end of the motor case 81 of the motor 80. At this time, the resolver 70 and the motor 80 are fastened together by bolts inserted into the motor mounting portion 23 of the ring-shaped stator structure 1 (see Figure 1) and bolt holes (not shown) formed in the motor case 81.

[0024] The resolver 70 is mounted by fitting the insulator 20 on the side where the stator core cover 50 is not provided into an opening 82 formed at one end of the motor case 81. That is, the insulator 20 and the motor interior side of the ring-shaped stator core 30 are housed inside the motor case 81. Also housed inside the motor case 81 is a motor stator 84 fixed to the inner wall of the motor case 81 and a motor rotor 85 provided opposite the motor stator 84. The motor 80 constitutes the rotating electric machine section, the motor case 81 constitutes the rotating electric machine case, the opening 82 constitutes the resolver housing section, the motor stator 84 constitutes the rotating electric machine stator, and the motor rotor 85 constitutes the rotating electric machine motor. The resolver 70 also constitutes the rotation sensor section.

[0025] The resolver rotation shaft 71, fixed to the resolver rotor 72 of the resolver 70, and the motor rotation shaft 83, fixed to the motor rotor 85 of the motor 80, are aligned. The resolver housing, which is the opening 82 of the motor case 81, is closed by the insulator 20 and stator core cover 50 of the ring-shaped stator structure 1. The motor structure 10 is then composed of the motor 80 and the resolver 70.

[0026] As described above, the ring-shaped stator structure 1 according to this embodiment 1 comprises a ring-shaped stator core 30 having a plurality of protruding magnetic poles 31 protruding radially, an insulator 20 integrally molded with the ring-shaped stator core 30, and a stator core cover 50 coupled to the insulator 20. The insulator 20 has a first insulator connection portion 25 formed radially outward from the protruding magnetic poles 31, along the circumferential direction of the ring-shaped stator core 30, and formed to protrude along the axial direction of the ring-shaped stator core 30. The stator core cover 50 has a ring-shaped side portion 51 extending along the axial direction of the ring-shaped stator core 30 and a bottom portion 52 that closes one end of the ring-shaped side portion 51. Since at least a part of the first insulator connection portion 25 and at least a part of the ring-shaped side portion 51 are coupled, the assembly man-hours of the ring-shaped stator structure can be reduced.

[0027] Furthermore, a male threaded portion 26 is formed on at least a part of the first insulator connection portion 25, and a female threaded portion 54 is formed on at least a part of the ring-shaped side portion 51. Since the male threaded portion 26 and the female threaded portion 54 are screwed together, there is no need to fasten metal screws or bolts separate from the stator core cover 50 with a fastening tool, thus reducing the number of parts and assembly steps of the ring-shaped stator structure 1.

[0028] Furthermore, the motor structure 10 according to this embodiment 1 comprises a motor stator 84, a motor rotor 85, a motor case 81 housing the motor stator 84 and the motor rotor 85, a motor 80 having an opening 82 formed in the motor case 81, and a resolver 70 having a ring-shaped stator structure 1. The ring-shaped stator structure 1 is provided in the opening 82 and closes the opening 12, so the ring-shaped stator structure 1 can be used as a cover member to close the opening 12 of the motor 80.

[0029] Embodiment 2. Next, a ring-shaped stator structure according to Embodiment 2 of the present invention will be described. In the embodiments described below, the same reference numerals as those in Figures 1 to 4 are the same or similar components as those in Embodiment 1, so a detailed description thereof will be omitted. The ring-shaped stator structure according to Embodiment 2 is characterized in that the stator core cover is joined to the insulator by ultrasonic welding, compared to Embodiment 1. Figure 5 is an enlarged cross-sectional view of the contact portion between the insulator and the stator core cover of the ring-shaped stator structure according to Embodiment 2. The insulator 20 has a first insulator connection portion 25 formed radially outward from the tip of the protruding magnetic pole 31 (see Figure 2) along the circumferential direction of the ring-shaped stator core 30 and formed to protrude along the axial direction of the ring-shaped stator core 30 indicated by arrow X, and a second insulator connection portion 27 formed perpendicularly from the first insulator connection portion 25 and extending radially outward. Note that the first insulator connection portion 25 of Embodiment 2 does not have the male thread portion 26 of Embodiment 1.

[0030] The stator core cover 50 extends along the axial direction of the annular stator core 30 indicated by arrow X and has an annular side portion 51 that is annular when viewed in the direction of arrow X. The annular side portion 51 is formed so that its inner diameter contacts the outer diameter of the first insulator connection portion 25. Note that the annular side portion 51 of this second embodiment does not have the female thread portion 54 of the first embodiment. The stator core cover 50 also has a bottom portion 52 that closes one end of the annular side portion 51. Furthermore, the stator core cover 50 has a flange portion 53 that protrudes radially outward from the other end of the annular side portion 51. The area where the flange portion 53 of the stator core cover 50 and the second insulator connection portion 27 of the insulator 20 are in contact constitutes an ultrasonic welding portion 28. The flange portion 53 of the stator core cover 50 and the second insulator connection portion 27 of the insulator 20 are joined by ultrasonic welding at the ultrasonic welding portion 28. The other configurations are the same as in Embodiment 1.

[0031] Next, with reference to Figure 5, the assembly method of the ring-shaped stator structure 1 of this embodiment 2 will be described. In the assembly of the ring-shaped stator structure 1 according to Embodiment 2, the assembly method of the ring-shaped stator core 30, insulator 20, stator winding 32, each terminal pin 24, rotor, and rotor rotation shaft is the same as in Embodiment 1.

[0032] Then, when attaching the stator core cover 50 to the insulator 20, the worker brings the inner diameter of the ring-shaped side portion 51 of the stator core cover 50 into contact with the outer diameter of the first insulator connection portion 25 of the insulator 20, and brings the flange portion 53 into contact with the second insulator connection portion 27. Next, the worker brings the horn of the ultrasonic welding machine into contact with the flange portion 53, and ultrasonically welds the ultrasonic welding portion 28 where the flange portion 53 and the second insulator connection portion 27 are in contact, thereby easily fixing the stator core cover 50 to the insulator 20.

[0033] As described above, since the second insulator connection portion 27 and at least a part of the insulator 20 are joined by ultrasonic welding, there is no need to fasten the stator core cover 50 and the insulator 20 with bolts or the like using a fastening tool, thus reducing the number of parts and assembly steps of the ring-shaped stator structure 1.

[0034] In this embodiment 2, the second insulator connection portion 27 of the insulator 20 and the flange portion 53 of the stator core cover 50 were ultrasonically welded together. Alternatively, the first insulator connection portion 25 of the insulator 20 and the annular side portion 51 of the stator core cover 50 may be ultrasonically welded together to connect the insulator 20 and the stator core cover 50, or the second insulator connection portion 27 and the flange portion 53 and the first insulator connection portion 25 and the annular side portion 51 may be ultrasonically welded together to connect the insulator 20 and the stator core cover 50.

[0035] Alternatively, in Embodiment 1, after screwing the male threaded portion 26 of the first insulator connection portion 25 of the insulator 20 with the female threaded portion 54 of the ring-shaped side portion 51 of the stator core cover 50, the insulator 20 and the stator core cover 50 may be joined by ultrasonic welding the contact portion between the second insulator connection portion 27 of the insulator 20 and the flange portion 53 of the stator core cover 50.

[0036] Embodiment 3. Next, a ring-shaped stator structure according to Embodiment 3 of the present invention will be described. The ring-shaped stator structure according to Embodiment 3 is characterized by the addition of a gasket between the insulator and the stator core cover, compared to Embodiment 1. Figure 6 is an enlarged cross-sectional view of the contact area between the insulator and the stator core cover in this third embodiment. The second insulator connection portion 27, formed to extend radially outward perpendicularly from the first insulator connection portion 25 of the insulator 20, has a groove portion 27a on the side facing the flange portion 53. The flange portion 53 of the stator core cover 50 has a groove portion 53a on the side facing the second insulator connection portion 27, opposite to the groove portion 27a.

[0037] The grooves 27a and 53a are combined to form a ring-shaped groove. A gasket 90 is housed inside the grooves 27a and 53a, in close contact with the inner walls of the grooves. In this third embodiment, the gasket 90 is a rubber O-ring. The gasket 90 is a sealing member that seals the gap between the stator core cover 50 and the insulator 20, preventing moisture or oil from entering the ring-shaped stator core 30 inside the stator core cover 50 through the gap. The gasket 90 constitutes a solid sealing member. The other configurations are the same as in the first embodiment.

[0038] Next, the assembly method of the ring-shaped stator structure 1 of this embodiment 3 will be described. The assembly method up to the moment just before screwing the male threaded portion 26 of the first insulator connection portion 25 of the insulator 20 and the female threaded portion 54 of the ring-shaped side portion 51 of the stator core cover 50 is the same as in Embodiment 1. Next, before screwing the male threaded portion 26 and the female threaded portion 54 together, the gasket 90 is inserted into the groove portion 27a of the insulator 20. Then, by screwing the male threaded portion 26 and the female threaded portion 54 together and fastening the stator core cover 50 to the insulator 20, the gasket 90 is housed inside the groove portions 27a and 53a.

[0039] As described above, a flange portion 53 is provided at the end of the ring-shaped side portion 51 so as to protrude radially outward, and a gasket 90 is provided between the flange portion 53 and the insulator 20. Therefore, when fastening the stator core cover 50 to the insulator 20 by screwing the male thread portion 26 and the female thread portion 54 together, the contact portion between the second insulator connection portion 27 and the flange portion 53 is sealed by the gasket 90, thereby more reliably preventing the intrusion of foreign matter such as moisture or oil from the outside to the inside of the ring-shaped stator structure 1, and improving the sealing performance of the ring-shaped stator structure 1.

[0040] In this embodiment 3, the gasket 90 was provided between the second insulator connection portion 27 of the insulator 20 and the flange portion 53 of the stator core cover 50. However, a groove may be provided in the first insulator connection portion 25 of the insulator 20, and a groove opposite to the groove of the first insulator connection portion 25 may be provided in the annular side portion 51 of the stator core cover 50, and the male thread portion 26 and female thread portion 54 may be screwed together to provide the gasket 90 inside the groove of the first insulator connection portion 25 and the groove of the stator core cover 50. In this modified embodiment 3, the contact portion between the first insulator connection portion 25 and the annular side portion 51 is sealed with the gasket 90, which more reliably prevents the intrusion of foreign matter such as moisture or oil from the outside to the inside of the annular stator structure 1, thereby improving the sealing performance of the annular stator structure 1.

[0041] Furthermore, although the gasket 90 in this third embodiment was an O-ring, it is not limited to this, and any suitable solid sealing member such as a resin gasket or a metal gasket may be used.

[0042] Embodiment 4. Next, a ring-shaped stator structure according to Embodiment 4 of the present invention will be described. In the ring-shaped stator structure according to Embodiment 4, a potting agent is provided between the insulator and the stator core cover, compared to Embodiment 1. Figure 7 is an enlarged cross-sectional view of the contact area between the insulator and the stator core cover in this embodiment 4. A potting agent 91 made of waterproof resin is applied to the contact area between the second insulator connection portion 27, which is formed to extend radially outward perpendicularly from the first insulator connection portion 25 of the insulator 20, and the flange portion 53. The potting agent 91 is made of a waterproof resin material such as urethane resin, epoxy resin, or silicone resin, and is a sealing member that seals the gap between the stator core cover 50 and the insulator 20, preventing moisture or oil from entering the annular stator core 30 inside the stator core cover 50 through the gap. The potting agent 91 is a waterproof resin agent. The other configurations are the same as in embodiment 1.

[0043] Next, the assembly method of the ring-shaped stator structure 1 of this embodiment 4 will be described. The assembly method up to screwing the male threaded portion 26 of the first insulator connection portion 25 of the insulator 20 and the female threaded portion 54 of the ring-shaped side portion 51 of the stator core cover 50 together is the same as in Embodiment 1. Next, after screwing the male threaded portion 26 and the female threaded portion 54 together, potting agent 91 is applied to the contact area between the second insulator connection portion 27 and the flange portion 53.

[0044] As described above, a flange portion 53 is provided at the end of the ring-shaped side portion 51 so as to protrude radially outward, and a potting agent 91 is provided at the contact point between the flange portion 53 and the insulator 20. Therefore, when fastening the stator core cover 50 to the insulator 20 by screwing the male thread portion 26 and the female thread portion 54 together, the contact point between the second insulator connection portion 27 and the flange portion 53 is sealed by the potting agent 91, thereby more reliably preventing the intrusion of foreign matter such as moisture or oil from the outside to the inside of the ring-shaped stator structure 1, and improving the sealing performance of the ring-shaped stator structure 1.

[0045] In this embodiment, the potting agent 91 was applied to the contact area between the second insulator connection portion 27 and the flange portion 53. However, a stator core cover 50 without a flange portion 53 may be used, and the potting agent 91 may be applied between the ring-shaped side portion 51 and the second insulator connection portion 27. In this modified embodiment 4, the contact area between the ring-shaped side portion 51 and the second insulator connection portion 27 is sealed with the potting agent 91, thereby more reliably preventing the intrusion of foreign matter such as moisture and oil from the outside to the inside of the ring-shaped stator structure 1, and improving the sealing performance of the ring-shaped stator structure 1.

[0046] Furthermore, the components included in Embodiments 1 to 4 of the present invention and the components included in their modified forms can be used in appropriate combinations.

[0047] Although preferred embodiments have been described in detail above, the invention is not limited to the embodiments described above, and various modifications and substitutions can be made to the embodiments described above without departing from the scope of the claims.

[0048] The various aspects of this disclosure are summarized below as an appendix. (Note 1) A ring-shaped stator core (30) having multiple protruding magnetic poles (31) that protrude along the radial direction, The ring-shaped stator core (30) and the insulator (20) which are integrally molded together, The stator core cover (50) is coupled to the insulator (20) and Equipped with, The insulator (20) has an insulator connection portion (25) that is formed radially outward with respect to the protruding magnetic pole (31), along the circumferential direction of the annular stator core (30), and that protrudes along the axial direction of the annular stator core (30), The stator core cover (50) is The annular stator core (30) has an annular side portion (51) that extends along the axial direction, The bottom portion (52) that closes one end of the ring-shaped side portion and It has, An annular stator structure in which at least a part of the insulator connection portion (25) and at least a part of the annular side portion (51) are connected. (Note 2) A first threaded portion (26) is formed on at least a part of the insulator connection portion (25). A second threaded portion (54) is formed on at least a part of the ring-shaped side portion (51). The ring-shaped stator structure described in Appendix 1, wherein the first threaded portion (26) and the second threaded portion (54) are screwed together. (Note 3) The annular stator structure according to Appendix 1, wherein at least a portion of the insulator connection portion (27) and at least a portion of the stator core cover (50) are joined by ultrasonic welding. (Note 4) The end of the ring-shaped side portion (51) is provided with a flange portion (53) that is formed to protrude radially outward. An annular stator structure according to any one of the appendices 1 to 3, wherein a solid sealing member (90) is provided between the annular side portion (51) or the flange portion (53) and the insulator (20). (Note 5) The end of the ring-shaped side portion (51) is provided with a flange portion (53) that is formed to protrude radially outward. An annular stator structure according to any one of the appendices 1 to 4, wherein a waterproof resin agent (91) is provided at the contact portion between the annular side portion (51) or the flange portion (53) and the insulator (20). (Note 6) Rotating electric machine stator (84), Rotating electric motor rotor (85) and A rotating electric machine case (81) housing the rotating electric machine stator (84) and the rotating electric machine rotor (85), An opening (82) formed in the rotating electric machine case (81), A rotating electric machine section (80) having, A rotating sensor unit (70) having a ring-shaped stator structure as described in any one of the appendices 1 to 5 and Equipped with, The ring-shaped stator structure (1) is a rotating electric machine structure provided in the opening (82) and closing the opening (82). [Explanation of Symbols]

[0049] 1. Ring-shaped stator structure 20 Insulators 25 Insulator connection section 26 First threaded section 27 Insulator connection section 30 Ring-shaped stator cores 31 Protruding magnetic pole 50 Stator Core Cover 51 Ring-shaped side portion 52 Bottom 53 Flange section 54 Second threaded section 80 Motor (Rotating Electrical Machine Section) 81 Motor case (rotating electric machine case) 82 Opening 84. Motor Stator (Rotating Electrical Machine Stator) 85 Motor Rotor (Rotating Electric Machine Rotor) 90 Gasket (Solid sealing material) 91. Potting agent (waterproofing resin agent)

Claims

1. A ring-shaped stator core (30) having multiple protruding magnetic poles (31) that protrude along the radial direction, The ring-shaped stator core (30) and the insulator (20) which are integrally molded together, The stator core cover (50) is coupled to the insulator (20) and Equipped with, The insulator (20) has an insulator connection portion (25) that is formed radially outward with respect to the protruding magnetic pole (31), along the circumferential direction of the annular stator core (30), and that protrudes along the axial direction of the annular stator core (30). The stator core cover (50) is The annular stator core (30) has an annular side portion (51) that extends along the axial direction, The bottom portion (52) that closes one end of the ring-shaped side portion and It has, An annular stator structure in which at least a part of the insulator connection portion (25) and at least a part of the annular side portion (51) are connected.

2. A first threaded portion (26) is formed on at least a part of the insulator connection portion (25). A second threaded portion (54) is formed on at least a part of the ring-shaped side portion (51). The ring-shaped stator structure according to claim 1, wherein the first threaded portion (26) and the second threaded portion (54) are screwed together.

3. The annular stator structure according to claim 1, wherein at least a portion of the insulator connection portion (27) and at least a portion of the stator core cover (50) are joined by ultrasonic welding.

4. The end of the ring-shaped side portion (51) is provided with a flange portion (53) that is formed to protrude radially outward. The annular stator structure according to any one of claims 1 to 3, wherein a solid sealing member (90) is provided between the annular side portion (51) or the flange portion (53) and the insulator (20).

5. The end of the ring-shaped side portion (51) is provided with a flange portion (53) that is formed to protrude radially outward. The annular stator structure according to any one of claims 1 to 3, wherein a waterproof resin agent (91) is provided at the contact portion between the annular side portion (51) or the flange portion (53) and the insulator (20).

6. Rotating electric machine stator (84), Rotating electric machine rotor (85) and A rotating electric machine case (81) housing the rotating electric machine stator (84) and the rotating electric machine rotor (85), The opening (82) formed in the rotating electric machine case (81), A rotating electric motor unit (80) having, A rotating sensor unit (70) having the ring-shaped stator structure described in any one of claims 1 to 3 and Equipped with, The ring-shaped stator structure (1) is a rotating electric machine structure provided in the opening (82) and closing the opening (82).

Images