Motor

Abstract

To simplify a structure.SOLUTION: A motor includes a plurality of split stators each having a split core and an insulating member housing the split core. Among the plurality of split stators, a first split stator and a second split stator are adjacent to each other in the circumferential direction. A first portion of the insulating member of the first split stator opposes a second portion of the insulating member of the second split stator, and a coupling portion is formed by the first portion, the second portion, and a member that bonds the first portion and the second portion.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a motor. [Background technology]

[0002] In motors for vehicles, etc., techniques for forming a stator by connecting split stators including split cores in the circumferential direction are known. For example, a technique is known in which a press-fitting member is pressed into a hole to expand a protrusion, thereby joining two components with a pressure contact between a groove and a protrusion, and a technique is known in which a cylindrical core is resin-molded so that the circumferential ends of adjacent split cores are movable relative to each other and the pressure of molten resin is applied in a direction that presses the split cores against the molding die. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-82275 [Patent Document 2] Japanese Patent Application Laid-Open No. 2008-236921 Summary of the Invention [Problem to be solved by the invention]

[0004] When connecting the split stators, if sufficient strength is not ensured, the circularity may deteriorate. To maintain the strength of the connecting parts, the shape of the connecting parts may become complex, or the motor structure may become more complex, such as by combining welding and resin molding processes.

[0005] One object of the present invention is to provide a motor that can be simplified in structure. [Means for solving the problem]

[0006] In one aspect, the motor includes a plurality of split stators, each having a split core and an insulating member that houses the split core. Among the plurality of split stators, a first split stator and a second split stator are adjacent in the circumferential direction. A first portion of the insulating member of the first split stator faces a second portion of the insulating member of the second split stator, and a connecting portion is formed by the first portion, the second portion, and a member that bonds the first portion and the second portion.

[0007] According to one aspect, the structure can be simplified. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a partial cross-sectional view showing an example of a motor according to a first embodiment. [Figure 2] FIG. 2 is a perspective view showing an example of connected split stators in the first embodiment. [Figure 3] FIG. 3 is an exploded perspective view showing an example of a split stator according to the first embodiment. [Figure 4] FIG. 4 is an exploded perspective view showing an example of a split stator according to the first embodiment. [Figure 5] FIG. 5 is a side cross-sectional view showing an example of connected split stators in the first embodiment. [Figure 6] FIG. 6 is an enlarged perspective view showing an example of an upper insulator before adhesive is injected in the first embodiment. [Figure 7] FIG. 7 is a cross-sectional perspective view showing an example of connected split stators in the first embodiment. [Figure 8] FIG. 8 is another cross-sectional side view showing an example of connected split stators in the first embodiment. [Figure 9] FIG. 9 is another cross-sectional view showing an example of connected split stators in the first embodiment. [Figure 10] FIG. 10 is a cross-sectional view showing an example of connected split stators in the first modified example. [Figure 11] FIG. 11 is a perspective view showing an example of a divided stator before adhesive is injected in the second embodiment. [Figure 12] FIG. 12 is a side cross-sectional view showing an example of a divided stator before adhesive is injected in the second embodiment. [Figure 13] FIG. 13 is a partial cross-sectional side view showing an example of connected split stators according to the second embodiment. [Figure 14] FIG. 14 is a perspective view showing an example of a divided stator before adhesive is injected in the third embodiment. [Figure 15] FIG. 15 is a side cross-sectional view showing an example of a split stator according to the third embodiment. [Figure 16] FIG. 16 is a cross-sectional view showing an example of a divided stator before adhesive is injected in the third embodiment. [Figure 17] FIG. 17 is a perspective view showing an example of a stator according to the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the motor disclosed herein will be described in detail with reference to the drawings. Note that the dimensional relationships between elements in the drawings, the ratios between elements, and the like may differ from reality. The drawings may also include portions where the dimensional relationships and ratios between elements differ. To facilitate understanding of the description, the drawings may illustrate a coordinate system in which the direction in which a shaft 99 (described later) extends (the rotational axis direction) is the Z-axis direction, and the radially outer side of a split stator 10L (described later) is the positive side of the Y-axis. Note that the same components are designated by the same reference numerals throughout the description of the embodiments.

[0010] [First embodiment] First, the motor according to the first embodiment will be described with reference to Fig. 1. Fig. 1 is a partial cross-sectional view showing an example of a motor according to the first embodiment. As shown in Fig. 1, the motor 1 according to the first embodiment includes a frame 91, a stator 2, a rotor 92, and a shaft 99. As shown in Fig. 1, the motor 1 according to the first embodiment is a so-called inner rotor type motor in which the rotor 92 is disposed radially inward of the stator 2.

[0011] The shaft 99 is fixed to the center of the rotor 92 in the radial direction, and rotates in conjunction with the rotor 92. One or both ends of the shaft 99 in the Z-axis direction protrude outward from the frame 91, as shown in FIG.

[0012] Stator 2 includes a plurality of split stators 10A to 10L. Of the plurality of split stators 10A to 10L, a first split stator and a second split stator are adjacent to each other in the circumferential direction. For example, as shown in FIGS. 1 and 2, split stator 10A is disposed on the positive side of split stator 10L along the X axis. FIG. 2 is a perspective view showing an example of coupled split stators in the first embodiment. Of the plurality of split stators 10A to 10L, only split stators 10L and 10A are shown in FIG. 1. Split stator 10L is an example of a first split stator, and split stator 10A is an example of a second split stator.

[0013] Segment stators 10A to 10L have the same structure, and the following describes segment stators 10L and 10A as examples. As shown in Figures 1 and 2, in segment stator 10L, the positive side of the Y axis indicates the outer side in the radial direction, and the X axis indicates the circumferential direction.

[0014] As shown in Figures 3 and 4, the split stator 10 includes a split core 100, an insulator 20 that houses a portion of the split core 100, and a coil 400. Figures 3 and 4 are exploded perspective views showing an example of a split stator according to the first embodiment. The insulator 20 is an example of an insulating member.

[0015] The split core 100 is formed by stacking multiple steel plates forming a magnetic body in the Z-axis direction. The split core 100 includes an inner peripheral portion 110 as a magnetic pole portion, a connecting portion 120, and an outer peripheral portion 130. The inner peripheral portion 110 protrudes on both sides in the circumferential direction from the radially inner side of the split core 100. The outer peripheral portion 130 protrudes on both sides in the circumferential direction from the radially outer side of the split core 100. The connecting portion 120 connects the inner peripheral portion 110 and the outer peripheral portion 130 in the radial direction. The split core 100 in the first embodiment is a so-called T-core, which includes circumferentially protruding portions 110, 130 on both the radially inner and outer sides.

[0016] The insulator 20 is an insulating member made of resin or the like that covers the split core 100. As shown in FIGS. 3 and 4, the insulator 20 includes an upper insulator 200 and a lower insulator 300. The upper insulator 200 is attached to the split core 100 from the positive side in the Z-axis direction, and the lower insulator 300 is attached to the split core 100 from the negative side in the Z-axis direction. Note that in the first embodiment, the following description of the shape of the upper insulator 200 may also apply to the lower insulator 300.

[0017] The coil 400 is formed by winding a conductor such as a copper wire with an insulating coating around the split core 100 via the upper insulator 200 and the lower insulator 300. The coil 400 has two terminals 419 and 429 that protrude, for example, in the positive direction along the Z axis. Note that, for the sake of explanation, the coil 400 after being wound around the split core 100 is shown by a dashed line in Figures 3 and 4; in reality, the coil 400 is not disassembled from the split core 100 while maintaining its wound shape. The same applies to adhesives 60k and 60l, which will be described later, and welded portions 70k and 70l, which will be described later.

[0018] The upper insulator 200 includes an inner circumferential portion 210, a connecting portion 220, and an outer circumferential portion 230. The inner circumferential portion 210 contacts a part of the inner circumferential portion 110 of the split core 100 from the outside in the radial direction. The connecting portion 220 connects the inner circumferential portion 210 and the outer circumferential portion 230 in the radial direction, and covers the connecting portion 120 of the split core 100 from both sides in the circumferential direction and from the positive side of the rotation axis.

[0019] The lower insulator 300 includes an inner circumferential portion 310, a connecting portion 320, and an outer circumferential portion 330. The inner circumferential portion 310 contacts a part of the outer circumferential portion 130 of the split core 100 from the outside in the radial direction. The connecting portion 320 connects the inner circumferential portion 310 and the outer circumferential portion 330 in the radial direction, and covers the connecting portion 120 of the split core 100 from both sides in the circumferential direction and from the negative side of the rotation axis.

[0020] As shown in Fig. 4, the outer peripheral portion 230 of the upper insulator 200 has a side surface 231 extending to one side in the circumferential direction, a side surface 232 extending to the other side in the circumferential direction, and an end surface 240 located on the positive side of the Z axis. The outer peripheral portion 330 of the lower insulator 300 has a side surface 331 extending to one side in the circumferential direction, a side surface 332 extending to the other side in the circumferential direction, and an end surface 340 located on the negative side of the Z axis. As shown in Fig. 4, in the split stator 10L, the side surfaces 231 and 331 extend to the positive side of the X axis, and the side surfaces 232 and 332 extend to the negative side of the X axis. The side surfaces 231, 232, 331, and 332 contact a portion of the outer peripheral portion 130 of the split core 100 from the radially inner side.

[0021] The end face 240 of the upper insulator 200 protrudes radially outward from the ends of the side faces 231 and 232 on the positive side in the Z axis, and the end face 340 of the lower insulator 300 protrudes radially outward from the ends of the side faces 331 and 332 on the negative side in the Z axis. The end face 240 covers a part of the outer circumferential portion 130 of the split core 100 from the positive side in the Z axis, and the end face 340 of the lower insulator 300 covers another part of the outer circumferential portion 130 of the split core 100 from the negative side in the Z axis.

[0022] Furthermore, a recess 251 recessed radially inward is formed at a circumferential end of side surface 231 of upper insulator 200, and a recess 351 recessed radially inward is formed at a circumferential end of lower insulator 300. As shown in Fig. 2, in split stator 10A, recess 251 and recess 351 are in contact with each other in the Z-axis direction and form first portion 51A of insulator 20. Similarly, in split stator 10L, recess 252 and recess 352 located on the other circumferential side form second portion 52L.

[0023] As shown in FIG. 2, the recess 251 of the upper insulator 200 extends to the end face 240 in the Z-axis direction. On the other hand, the lower end of the recess 351 of the lower insulator 300 in the Z-axis direction does not penetrate the end face 340, and has a bottom 361 as shown in FIG. 5. FIG. 5 is a side cross-sectional view showing an example of coupled split stators in the first embodiment. FIG. 5 shows a cross section taken along line BB in FIG. 2. In this case, the first portions 51A, 51L shown in FIG. 2 are open only toward the positive side in the Z-axis direction, as shown in FIG. 5.

[0024] Further, holes 241 and 242 are formed in an end surface 240 of the upper insulator 200. Note that in FIG. 5, the adhesive 60k shown in FIG. 2 is omitted. The hole 241 is formed on one side in the circumferential direction, and the hole 242 is formed on the other side in the circumferential direction. The holes 241 and 242 extend from the end surface 240 toward the negative side in the Z-axis direction. In this case, as shown in FIG. 6, a radially outer portion of the hole 241 penetrates the negative side in the Z-axis direction, and a radially inner portion of the hole 241 abuts against the side surface 231. FIG. 6 is an enlarged perspective view showing an example of the upper insulator before adhesive is injected in the first embodiment. FIG. 6 is an enlarged view of the portion indicated by the frame F1 in FIG. 2 in a state in which the upper insulator 200 of the split stator 10L and the upper insulator 200 of the split stator 10A are combined.

[0025] 5, a portion of the hole 241 is continuous in the circumferential direction with a recess 251 that extends to the end face 240 in the Z-axis direction. In this configuration, the hole 241 opens to one side in the circumferential direction via the recess 251. Similarly, the hole 242 opens to the other side in the circumferential direction via the recess 252.

[0026] 6, first portion 51L of first stator split 10L faces second portion 52A of second stator split 10A in the circumferential direction. Also, first portion 51L opens toward second portion 52A of second stator split 10A, and second portion 52A opens toward first portion 51L of first stator split 10L.

[0027] The first portion 51L and the second portion 52A are bonded together with an adhesive 60l such as resin. In this case, as shown in FIG. 7, the first portion 51L, the second portion 52A, and the adhesive 60l form a connecting portion 50l. FIG. 7 is a cross-sectional perspective view showing an example of a connected split stator according to the first embodiment. FIG. 7 shows a cross section taken along line DD in FIG. 5. As shown in FIG. 6, the first portion 51L and the second portion 52A form an area 59l in the connecting portion 50l that accommodates the adhesive 60l. The adhesive 60l is an example of a bonding member.

[0028] 7, adhesive 60l extends from first portion 51L to second portion 52A in the circumferential direction. With this configuration, stator segment 10L having insulator 20 is connected to stator segment 10A.

[0029] In the first embodiment, as shown in Fig. 4, recesses 131 and 132 extending radially outward are formed on the radially inner surface of the outer peripheral portion 130 of the split core 100. As shown in Fig. 8, the recess 131 is formed at a position where the first split core and the second split core face each other. Fig. 8 is another side cross-sectional view showing an example of coupled split stators in the first embodiment. Fig. 8 shows a cross section taken along line AA in Fig. 2. Note that in Fig. 8, the first split core is, for example, the split core 100 of the first split stator 10L, and the second split core is, for example, the split core 100 of the second split stator 10A.

[0030] The recess 131 is located on one side in the circumferential direction, for example, on the positive side of the X axis shown in FIG. 8, and the recess 132 is located on the other side in the circumferential direction, for example, on the negative side of the X axis shown in FIG.

[0031] 7, the connecting portion 50l containing the adhesive 60l is surrounded by the radially inner surface of the outer circumferential portion 130 of the split core 100. The adhesive 60l is also in close contact with the radially outer surfaces 231, 232, 331, 332 of the insulator 20 and the radially inner surface of the outer circumferential portion 130 of the split core 100.

[0032] In this case, the portion of the first portion 51 formed on the side surface 231 or 331 faces the recess 131 in the outer circumferential portion 130 of the split core 100 on the radially outer side. Similarly, the portion of the second portion 52 formed on the side surface 232 or 332 faces the recess 132 in the outer circumferential portion 130 of the split core 100 on the radially outer side. In this case, the adhesive 601 injected into the first portion 51 and the second portion 52 may bond the first portion 51L to the recess 131 in the outer circumferential portion 130 of the split core 100, as shown in FIG. 5 . The second portion 52A may also be bonded to the recess 132 in the same manner.

[0033] In the first embodiment, the radially outer surface of the outer circumferential portion 130 of the split core 100 may be joined by welding or the like. In this case, as shown in FIGS. 5 and 7, a welded portion 70l is formed on the radially outer surface of the outer circumferential portion 130 of the split core 100. As shown in FIG. 5, the welded portion 70l is located at a position radially opposite the recessed portion 251 of the upper insulator 200. In the first embodiment, the welded portion 70l is formed, for example, in the recessed portions 141 and 142 of the outer circumferential portion 130 of the split core 100 shown in FIG. 4. The welded portion 70l welds the split core 100 of the split stator 10L to the split core 100 of the split stator 10A. Similarly, the welded portion 70k shown in FIGS. 3 and 4 welds the split core 100 of the split stator 10K to the split core 100 of the split stator 10L. The recesses 141 and 142 are formed at positions radially opposite to the recesses 131 and 132, which are bonded with adhesive 60l, respectively. The welded portions 70k and 70l are an example of a separate member that straddles the split core of the first split stator and the split core of the second split stator.

[0034] Although welding the radially outer surface of the outer circumferential portion 130 of the split core 100 is a common technique, if the radially inner surface is not also fixed, the connection between the split stators 10L and 10A will widen, which may cause deterioration in roundness. On the other hand, since the radially inner surface of the outer circumferential portion 130 of the split core 100 is in close proximity to the insulator 20 and the coil 400, welding is difficult.

[0035] Therefore, in the first embodiment, the radially inner surface of the outer circumferential portion 130 of the split core 100 is fixed with adhesive 60l in the recesses 131 and 132. At this time, to prevent the adhesive from leaking out, a region 59l for accommodating the adhesive, which is formed between the insulator 20 and the split core 100, is used as an adhesive reservoir.

[0036] In the first embodiment, adhesive 60l is injected toward the negative side of the Z axis from hole 241 in stator segment 10L and hole 242 in stator segment 10A. In this case, adhesive 60l is filled into holes 241 and 242 in addition to containing region 59l, as shown in FIGS. 5 and 8, for example.

[0037] In this configuration, as shown in Figures 8 and 9, adhesive 60l injected from holes 241 and 242 may not reach bottom 361 formed on end surface 340 of lower insulator 300. Figure 9 is another cross-sectional view showing an example of coupled stator segments in the first embodiment. Figure 9 shows a cross section taken along line EE in Figure 5. As shown in Figure 9, bottom 361 of lower insulator 300 of split stators 10L and 10A is exposed and not covered with adhesive 60l.

[0038] The adhesive 60l also has high rigidity relative to the insulator 20. The adhesive 60l in the first embodiment is made of a material with high hardness, such as epoxy resin.

[0039] As described above, the motor 1 according to the first embodiment includes multiple stator segments 10A to 10L, each having a split core 100 and an insulating member 20 that accommodates the split core 100. Among the multiple stator segments 10A to 10L, the first stator segment 10L and the second stator segment 10A are adjacent to each other in the circumferential direction. The first portion 51L of the insulating member 20 of the first stator segment 10L faces the second portion 52A of the insulating member 20 of the second stator segment 10A. The first portion 51L, the second portion 52A, and the member 601 that bonds the first portion 51L and the second portion 52A together form a connecting portion 501. This configuration simplifies the structure of the stator 2 and the manufacturing process of the motor 1 when fixing the inner surface of the outer circumferential portion 130 of the split core 100.

[0040] [First Modification] Alternatively, as shown in Fig. 10, adhesive 60l may be filled only in accommodating region 59l, leaving holes 241 and 242 unfilled. Fig. 10 is a cross-sectional view showing an example of coupled stator segments in the first modified example. Fig. 10 shows a cross-section of stator segments A10L and A10A in the first modified example taken at a position corresponding to line CC in Fig. 5.

[0041] 10, in the stator segment A10L of the first modification, adhesive A60l is disposed only in region 59l that accommodates the adhesive. Even in this configuration, the adhesive A60l bonds the insulators 20 and the core segments 100 of the two circumferentially adjacent stator segments A10L and A10A to each other, thereby maintaining the strength of the connecting portions of the stator segments A10.

[0042] [Second embodiment] By enlarging the area in which the adhesive shown in the first embodiment is accommodated as shown in Fig. 11 and subsequent figures, two adjacent stator segments can be bonded more firmly. Fig. 11 is a perspective view showing an example of a stator segment before adhesive is injected in the second embodiment. Fig. 12 is a side cross-sectional view showing an example of a stator segment before adhesive is injected in the second embodiment. Fig. 12 shows a view cut along line FF in Fig. 11. In the following embodiments and modifications, parts that are the same as those shown in the drawings described above are given the same reference numerals, and duplicated explanations will be omitted.

[0043] 11, a stator segment B10 in the second embodiment includes a core segment 100, an insulator 40, and a coil 400. The insulator 40 includes an upper insulator 500 and a lower insulator 600. In the following description, when multiple stator segments B10 need to be distinguished from one another, they may be referred to as stator segments B10A to B10L, respectively.

[0044] 12, in the second embodiment, the first portion B51L is formed by a recess 551 of the upper insulator 500 and a recess 651 of the lower insulator 600. Similarly, the second portion B52A is formed by a recess 552 of the upper insulator 500 and a recess 652 of the lower insulator 600. The recesses 551 and 552 extend from an end face 540 located on the positive side of the upper insulator 500 in the Z axis direction to the negative side of the upper insulator 500 in the Z axis direction. Note that, hereinafter, when the multiple first portions B51A to B51L are not to be distinguished from one another, they may be referred to as the first portion B51. The same applies to the multiple second portions B52A to B52L.

[0045] As shown in Figures 11 and 12, the first part B51 and the second part B52 in the second embodiment have shapes that are enlarged in the radial and circumferential directions compared to the first part 51 and the second part 52 in the first embodiment as shown in Figure 2.

[0046] In this configuration, the adhesive B60l shown in FIG. 13 is directly injected into the region B59l formed by the first portion B51L and the second portion B52A. FIG. 13 is a partial cross-sectional side view showing an example of connected split stators in the second embodiment. As shown in FIG. 13, the first portion B51L, the second portion B52A, and the adhesive B60l form the connecting portion B50l. Also, as shown in FIG. 11, the region B59l faces the recesses 131 and 132 of the split core 100. In this case, the adhesive B60l also contacts the recesses 131 and 132, thereby bonding the split core 100 of the split stator B10L to the split core 100 of the split stator B10A. Note that, as shown in FIG. 13, the adhesive B60l does not reach the bottoms 661 and 662 of the recesses 651 and 652 in the second embodiment either.

[0047] In the second embodiment, the amount of adhesive B60l injected into the region B59l of the connecting portion B50l can be made larger than in the first embodiment. Furthermore, the contact area between the adhesive B60l and the first portion B51L and the second portion B52A can also be made larger. This configuration allows the split stators B10A to B10L to be more firmly connected. Furthermore, the cross-sectional area of ​​the injection port for the adhesive B60l can be made larger than in the first embodiment, improving workability.

[0048] [Third embodiment] Furthermore, as shown in Fig. 14 and subsequent figures, the holes 741 and 742 may be formed away from the circumferential ends of the stator segment C10. Fig. 14 is a perspective view showing an example of a stator segment before adhesive is injected according to the third embodiment. Fig. 15 is a side cross-sectional view showing an example of a stator segment before adhesive is injected according to the third embodiment. Fig. 16 is a cross-sectional view showing an example of a stator segment before adhesive is injected according to the third embodiment. Fig. 17 is a perspective view showing an example of a stator according to the third embodiment. Fig. 16 shows a cross-section taken along line GG in Fig. 14.

[0049] 17, in the third embodiment, a split stator C10L included in a stator C2 includes a split core 100, an insulator 80, and a coil 400. The insulator 80 in the third embodiment has an upper insulator 700 and a lower insulator 800.

[0050] The lower insulator 800 has an appearance similar to, for example, the lower insulator 300 in the first embodiment. Note that the lower insulator 800 in the third embodiment may have a shape that is approximately symmetrical in the Z-axis direction to the upper insulator 700 (a shape that is upside down). Also, in Fig. 14 and subsequent figures, the lower insulator 800 may be omitted from illustration.

[0051] 14, holes 741 and 742 extending in the Z-axis direction are formed in an end surface 740 of upper insulator 700 of split stator C10 in the Z-axis direction. Holes 741 and 742 are formed at positions closer to the center in the circumferential direction compared to holes 241 and 242 in the first embodiment. In other words, holes 741 and 742 are formed at positions spaced a predetermined distance from the ends of insulator 80 in the circumferential direction.

[0052] 16, recesses 751 and 752 are formed in the outer circumferential portion 730 of the upper insulator 700. As shown in Fig. 16, the recess 751 extends from an end on one side in the circumferential direction to a position more inward in the circumferential direction than the hole 741. Similarly, the recess 752 extends from an end on the other side in the circumferential direction to a position more inward in the circumferential direction than the hole 742.

[0053] 15 and 16, hole 741 communicates in the Z-axis direction with recess 751 formed in outer circumferential portion 730. Recess 751 of split stator C10L and recess 752 of split stator C10A, which is adjacent to split stator C10L in the circumferential direction, face each other in the circumferential direction, as shown in Fig. 16. Holes 741 and 742 are an example of communicating portions.

[0054] The lower insulator 800 may also have recesses formed therein having the same cross-sectional shape as the recesses 751 and 752. In this case, the recesses of the lower insulator 800 face the recesses 751 and 752 of the upper insulator 700 in the Z-axis direction.

[0055] In this case, the recess 751, together with the recess of the lower insulator 800 (not shown), forms the first portion C51 shown in Fig. 14. Similarly, the recess 752 shown in Fig. 14, together with the recess of the lower insulator 800 (not shown), forms the second portion C52.

[0056] 16, the first portion C51L and the second portion C52A form a region C59l. An adhesive (not shown) is injected into region C59l through holes 741 and 742. Region C59l has a larger area facing the outer circumferential portion 130 of the split core 100 than regions 59l and B59l, and therefore can bond two adjacent split cores 100 more strongly.

[0057] As described above, in the third embodiment, the insulator 80 includes the portions 741 and 742 that communicate with the region C59l that accommodates the adhesive C60l. The portions 741 and 742 are formed at positions spaced apart from the circumferential ends of the insulator 80. This configuration allows the accommodating region C59l to be made larger.

[0058] [Variations] Although the configurations of the respective embodiments have been described above, the embodiments are not limited thereto. For example, the adhesive 60 may be configured to contact the bottoms 361 and 362. Alternatively, the first portion 51 and the second portion 52 may penetrate in the Z-axis direction, e.g., the bottoms 361 and 362 may not be present. For example, in the third embodiment, if the lower insulator 800 has a shape similar to that of the upper insulator 700, a hole (not shown) communicating with the recess may be formed in the surface of the lower insulator 800 on the negative side in the Z-axis direction. In this case, the adhesive (not shown) may be injected from the holes 741 and 742 of the upper insulator 700 into the recesses 751 and 752, and then flow out of the hole of the lower insulator 800 to the negative side in the Z-axis direction via the recess of the lower insulator 800 located on the negative side in the Z-axis direction. This configuration can increase the bonding area in the Z-axis direction.

[0059] Furthermore, the motor is not limited to a so-called inner rotor type, but may be a so-called outer rotor type in which the rotor 92 is disposed radially outward from the stator 2. Furthermore, the split core 100 may be a so-called I-shaped core that does not have a portion that protrudes circumferentially on the radially outer or inner side.

[0060] Although the present invention has been described above based on the embodiments and modifications thereof, it goes without saying that the present invention is not limited to the embodiments and modifications thereof, and various modifications are possible without departing from the spirit of the present invention. Such modifications without departing from the spirit of the present invention are also included in the technical scope of the present invention, and this will be clear to those skilled in the art from the description of the claims. [Explanation of symbols]

[0061] 1 motor, 2 stator, 10, 10A to 10L, A10, A10A to A10L, B10, B10A to B10L, C10 split stator, 20, 40, 80 insulator, 50l, B50l connecting portion, 51, 51A to 51L, B51, C51L first portion, 52, 52A to 52L, B52, C52A second portion, 59l, B59l, C59l accommodating area, 60a to 60l, A60a to A60l, B60l, C60l adhesive, 70a to 70l welded portion, 100 split core, 110 inner peripheral portion, 120 connecting portion, 130 outer peripheral portion, 131, 132, 141, 142 recessed portion, 200, 500, 700 Upper insulator, 300, 600, 800 Lower insulator, 210, 310 Inner circumference, 220, 320 Connection, 230, 330, 730 Outer circumference, 231, 232, 331, 332 Side, 240, 340, 540, 740 End, 241, 242, 741, 742 Hole, 251, 252, 351, 352, 551, 552, 651, 652, 751, 752 Recess, 361, 362, 661, 662 Bottom, 400 Coil, 91 Frame, 92 Rotor, 99 Shaft

Claims

1. A split core; an insulating member that accommodates the split core; a plurality of divided stators each having a Among the plurality of stator segments, a first stator segment and a second stator segment are adjacent to each other in the circumferential direction, a first portion of the insulating member of the first split stator faces a second portion of the insulating member of the second split stator; a connecting portion is formed by the first portion, the second portion, and a member that bonds the first portion and the second portion together; Motor.

2. The motor according to claim 1 , wherein the first portion and the second portion form an area in the connecting portion that accommodates the member.

3. the first portion opens toward the second portion; The second portion is open toward the first portion. The motor according to claim 2 .

4. The motor according to claim 1 , wherein the member has a high rigidity relative to the insulating member.

5. The motor according to claim 1 , wherein the member extends from the first portion to the second portion in the circumferential direction.

6. the connecting portion is surrounded by the radially inner surface of the split core, The motor according to claim 1 , wherein the member is in close contact with a radially outer surface of the insulating member and a radially inner surface of the split core.

7. a recessed portion extending radially outward is formed on a radially inner surface of the split core at a position where the split core of the first split stator and the split core of the second split stator face each other, The motor according to claim 6 , wherein the member fits tightly into the recess.

8. The motor according to claim 7 , wherein another member spanning the split core of the first split stator and the split core of the second split stator faces the recess in the radial direction.

9. the insulating member has a portion that communicates with a region that accommodates the member; the communicating portion is formed at a position spaced from an end of the insulating member in the circumferential direction. The motor according to claim 2 .

Images