Stator and rotary electric machine

Abstract

To provide a stator having a coil with a high space factor and a rotary electric machine.SOLUTION: A stator includes: an annular stator core (2); a plurality of teeth (21) formed on an inner side (X2) of a radial direction (X) of a stator core (2), at predetermined intervals in a circumferential direction (Z), protruding toward the inner side (X2) in the radial direction (X) and extending in an axial direction (Y); a coil (4) distributed winding in slots (3) formed between the teeth (21); and insulators (5), guiding coil ends (40) of the coil (4) at both ends of the axial direction (Y) of the stator core (2). The insulators (5) each have a column portion (9) on each tooth portion (21) extending away from the stator core (2) in the axial direction (Y), and the coil ends (40) are arranged with the column portions (9) and routed in the circumferential direction (Z).SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a stator and a rotating electric machine. [Background technology]

[0002] A stator of a conventional rotating electrical machine is formed by a stator core and a coil made of magnet wire (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6712089 Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional rotating electrical machine stators, pre-wound coils are inserted into the stator core using equipment called an inserter. However, using an inserter to insert the coils poses the problem of making it difficult to manufacture stators with windings that have a high space factor.

[0005] The present disclosure discloses a technique for solving the above-mentioned problems, and aims to provide a stator for a rotating electrical machine that enables windings with a high space factor. [Means for solving the problem]

[0006] The stator of the present disclosure comprises: an annular stator core; a plurality of teeth formed on a radially inner side of the stator core at predetermined intervals in a circumferential direction, the teeth protruding radially inward and extending in an axial direction; a coil wound in slots formed between the teeth; and insulators for guiding coil ends of the coils at both axial ends of the stator core, the insulator includes a column portion on each of the teeth, the column portion extending in a direction away from the stator core in the axial direction, The coil ends of the stator are engaged with the pillars and routed in the circumferential direction. It is something. Further, the rotating electric machine of the present disclosure includes: A rotating electric machine comprising: the stator described above; and a rotor disposed radially inside the stator with a gap therebetween. It is something. [Effects of the Invention]

[0007] According to the stator and rotating electric machine of the present disclosure, It is possible to provide a coil with a high space factor. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic perspective view showing the configuration of a stator core of a stator of a rotary electric machine according to Embodiment 1. FIG. [Figure 2] 2 is a partial cross-sectional schematic view showing the configuration of the stator core shown in FIG. 1. [Figure 3] 2 is a perspective view showing the configuration of a stator using the stator core shown in FIG. 1. [Figure 4] 2 is a plan view showing a state in which an insulator is installed on the stator core shown in FIG. 1. [Figure 5] 2 is a side view showing a state in which an insulator is installed on the stator core shown in FIG. 1. [Figure 6] FIG. 6 is a perspective view showing the configuration of the first insulator shown in FIG. 5. [Figure 7] FIG. 7 is a plan view showing the configuration of the first insulator shown in FIG. 6. [Figure 8] FIG. 6 is a perspective view showing the configuration of the second insulator shown in FIG. 5. [Figure 9]9 is a plan view showing the configuration of the second insulator shown in FIG. 8. FIG. [Figure 10] 2 is a perspective view showing a state in which an insulator is installed on the stator core shown in FIG. 1 and a U-phase coil is formed. FIG. [Figure 11] 11 is a perspective view showing a state in which a V-phase coil is formed on the stator core and the insulator shown in FIG. [Figure 12] 4 is a cross-sectional view showing the configuration of a rotating electric machine using the stator shown in FIG. 3. [Figure 13] 10 is a plan view showing the configuration of an insulator of a stator of a rotary electric machine according to a second embodiment. FIG. [Figure 14] Fig. 14A is a perspective view showing the configuration of a first divided insulator of the first insulator shown in Fig. 13. Fig. 14B is a plan view showing the configuration of the first divided insulator shown in Fig. 14A. [Figure 15] Fig. 15A is a perspective view showing a configuration of a second divided insulator of a second insulator according to embodiment 2. Fig. 15B is a plan view showing the configuration of the second divided insulator shown in Fig. 15A. [Figure 16] FIG. 11 is a perspective view showing a state in which an insulator is installed on a stator core of a stator of a rotating electric machine according to a third embodiment. [Figure 17] FIG. 17 is a perspective view showing the configuration of an insulator of the stator shown in FIG. [Figure 18] FIG. 18 is a plan view showing the configuration of the insulator shown in FIG. [Figure 19] 17 is a perspective view showing a state in which a U-phase coil is formed on the stator core of the stator of the rotating electric machine shown in FIG. 16 after an insulator is installed thereon. FIG. [Figure 20] 20 is a perspective view showing a state in which a V-phase coil is formed on the stator core and insulator shown in FIG. 19. FIG. [Figure 21] 21 is a perspective view showing a state in which a W-phase coil is formed on the stator core and insulator shown in FIG. 20. FIG. [Figure 22]Fig. 22A is a perspective view showing the configuration of a divided insulator obtained by dividing the insulator shown in Fig. 17 in the circumferential direction. Fig. 22B is a plan view showing the configuration of the divided insulator shown in Fig. 22A. DETAILED DESCRIPTION OF THE INVENTION

[0009] In the following description, each direction in the rotating electric machine 100 will be referred to as the circumferential direction Z, the axial direction Y, the radial direction X, the outer side X1 of the radial direction X, and the inner side X2 of the radial direction X. Therefore, the stator 1 and other parts will also be described using these directions as references. Note that when the radial direction X is shown, only one location is shown in each figure except for Figures 5 and 12 for convenience. Furthermore, for convenience of description, the axial direction Y is sometimes shown and described as one side Y1 or the other side Y2. In particular, when there is no need to distinguish between them, only the axial direction Y is shown.

[0010] Embodiment 1 FIG. 1 is a schematic perspective view showing the configuration of a stator core of a stator of a rotating electric machine according to a first embodiment. FIG. 2 is a schematic partial cross-sectional view showing the configuration of the stator core shown in FIG. 1. FIG. 3 is a perspective view showing the configuration of a stator using the stator core shown in FIG. 1. FIG. 4 is a plan view showing a state in which an insulator is installed in the stator core shown in FIG. 1. FIG. 5 is a side view showing a state in which an insulator is installed in the stator core shown in FIG. 1. FIG. 6 is a perspective view showing the configuration of a first insulator shown in FIG. 5.

[0011] FIG. 7 is a plan view showing the configuration of the first insulator shown in FIG. 6. FIG. 8 is a perspective view showing the configuration of the second insulator shown in FIG. 5. FIG. 9 is a plan view showing the configuration of the second insulator shown in FIG. 8. FIG. 10 is a perspective view showing a state in which an insulator is installed on the stator core shown in FIG. 1 and a U-phase coil is formed thereon. FIG. 11 is a perspective view showing a state in which a V-phase coil is formed on the stator core and insulator shown in FIG. 10. FIG. 12 is a cross-sectional view showing the configuration of a rotating electric machine using the stator shown in FIG. 3.

[0012] As shown in Fig. 12, a rotating electric machine 100 includes a stator 1 and a rotor 101 that is disposed on an inner side X2 of the stator 1 in the radial direction X via a gap and that rotates on a rotating shaft 102. Next, the stator 1 will be described. As shown in Figs. 1 and 2, a stator core 2 of the stator 1 is formed in an annular shape. A plurality of teeth 21 are formed on the inner side X2 of the stator core 2 in the radial direction X at predetermined intervals in the circumferential direction Z, protruding toward the inner side X2 in the radial direction X and extending in the axial direction Y. Slots 3 for installing coils 4 are formed between adjacent teeth 21 in the circumferential direction Z.

[0013] The coils 4 are wound in a distributed manner between the two slots 3. Here, the coils 4 include U-phase, V-phase, and W-phase coils 4. The coils 4 are formed, for example, from magnet wire made of copper or aluminum wire. The coils 4 are arranged in all of the slots 3. In this case, the proportion of the coils 4 in the slot 3 is called the space factor, and it is desirable to increase this space factor. For convenience, only a portion of the coil 4 installed in one slot 3 is shown in Figures 1 and 2.

[0014] As shown in Fig. 3, the stator 1 is provided with insulators 5 at both ends of the stator core 2 in the axial direction Y to guide the coil ends 40 of the coils 4. The insulators 5 are provided with pillar portions 9 on each of the teeth 21, extending in a direction away from the stator core 2 in the axial direction Y. Therefore, the same number of pillar portions 9 as the number of teeth 21 are formed on each of the one side Y1 and the other side Y2 in the axial direction Y. The coil ends 40 of the coils 4 are engaged with the pillar portions 9 and routed in the circumferential direction Z.

[0015] As shown in Figures 7 and 9, each pillar portion 9 is formed on an annular connecting plate 90. Furthermore, the connecting plate 90 is formed with the same shape as the end face in the axial direction Y of the stator core 2 and the portions corresponding to the teeth portions 21 and slots 3. As shown in Figure 3, a first insulator 6 as the insulator 5 is present on one side Y1 in the axial direction Y of the stator core 2, and a second insulator 7 as the insulator 5 is present on the other side Y2. Note that the first insulator 6 and the second insulator 7 may be collectively referred to as the insulator 5.

[0016] Next, the first insulator 6 and the second insulator 7 will be described. As shown in Figures 6 and 7, the first insulator 6 has six sets of pillar portions 9, each set consisting of a first pillar portion 61, a second pillar portion 62, and a third pillar portion 63, arranged in order counterclockwise in the circumferential direction Z. Note that the first pillar portion 61, the second pillar portion 62, and the third pillar portion 63 may be collectively referred to as pillar portions 9.

[0017] Between adjacent pillar portions 9 in the circumferential direction Z, guide portions 50 are formed in the circumferential direction Z to separate the phases of the coil ends 40 in the axial direction Y. The guide portions 50 include a first guide portion 51 and a second guide portion 52. The first guide portion 51 is not formed between the first pillar portion 61 and the third pillar portion 63 that are adjacent in the circumferential direction Z, but is formed continuously in the circumferential direction Z between the first pillar portion 61, the second pillar portion 62, and the third pillar portion 63 that are adjacent in the counterclockwise direction in the circumferential direction Z, and is formed so as to protrude to the outer side X1 in the radial direction X. The second guide portion 52 is formed continuously in the circumferential direction Z between the second pillar portion 62 and the third pillar portion 63 that are adjacent in the circumferential direction Z, and is formed not continuously with the first pillar portion 61, and is formed so as to protrude to the outer side X1 in the radial direction X.

[0018] The first guide portion 51 is positioned closer to the stator core 2 in the axial direction Y than the second guide portion 52 in the axial direction Y. When referring to the first guide portion 51 and the second guide portion 52 collectively, they may be referred to as guide portion 50. Furthermore, each pillar portion 9 is provided with a protrusion 53 that protrudes outward X1 in the radial direction X at the end portion away from the stator core 2 in the axial direction Y.

[0019] A first reinforcing wall portion 55 is formed continuously between the first pillar portion 61, the second pillar portion 62, and the third pillar portion 63 in the circumferential direction Z on the axial direction Y side of the first guide portion 51. Further, a second reinforcing wall portion 56 is formed continuously between the second pillar portion and the third pillar portion in the circumferential direction on the axial direction Y side of the second guide portion 52. Each reinforcing wall portion 55, 56 reinforces the insulator 5 and also serves as a guide for routing the coil end 40 in the circumferential direction Z.

[0020] As shown in Figures 8 and 9, the second insulator 7, like the first insulator 6, has a column portion 9 formed of a first column portion 61, a second column portion 62, and a third column portion 63, and a guide portion 50 formed of a first guide portion 51, a second guide portion 52, and a protrusion portion 53.

[0021] As shown in FIGS. 4, 7, and 9, each pillar portion 9 is formed from the inner end X2 of the tooth portion 21 in the radial direction X to a circumference S (only a portion of the circumference S is shown by a dotted line) that connects the ends of each slot 3 on the outer side X1 in the radial direction X in a circular shape. Note that the circumference S shown in FIGS. 7 and 9 indicates the same position as the circumference S that connects the outer side X1 of each slot 3 in the radial direction X in a circular shape, as shown in FIG. 2. Therefore, as shown in FIGS. 7 and 9, the portion of each pillar portion 9 on the outer side X1 in the radial direction X, which is further from the circumference S, corresponds to the protrusion 53 and the guide portion 50. As is clear from FIGS. 6 and 7 for the first insulator 6 and FIGS. 8 and 9 for the second insulator 7, the first insulator 6 and the second insulator 7 have a mirror-like relationship.

[0022] 10, U-phase coil end 41 is engaged with the stator core 2 side in the axial direction Y of first guide portion 51 of first insulator 6 and second insulator 7. Furthermore, as shown in FIG. 11, V-phase coil end 42 is engaged with the axial direction Y between first guide portion 51 and second guide portion 52 of first insulator 6 and second insulator 7. Furthermore, as shown in FIGS. 3 and 11, W-phase coil end 43 is engaged with the axial direction Y between second guide portion 52 and protruding portion 53 of first insulator 6 and second insulator 7.

[0023] Therefore, the first guide portion 51 separates (insulates) the U-phase coil end 41 from the V-phase coil end 42. The second guide portion 52 separates (insulates) the V-phase coil end 42 from the W-phase coil end 43. The protrusion 53 prevents the W-phase coil end 43 from protruding in the axial direction Y away from the stator core 2.

[0024] Next, a method for manufacturing the stator of the first embodiment configured as described above will be described. First, the first insulator 6 and the second insulator 7 are respectively installed on both ends of the stator core 2 in the axial direction Y (see FIGS. 4 and 5). For example, the insulators 6, 7 are installed and fixed to the stator core 2 by fitting them into the slots 3 of the stator core 2, or by molding the insulators 6, 7 integrally with the stator core 2 and fixing them.

[0025] Next, the U-phase, V-phase, and W-phase coils 4 are wound in order. First, as an example, a case where winding is performed starting from slot 3 U1 in FIG. 4 will be described with reference to FIG. 10. Note that U1 to U6, V1 to V6, and W1 to W6 in FIG. 4 indicate the position of each slot 3. Also, while FIG. 4 shows one side Y1 in the axial direction Y, the positional relationship of each slot 3 is the same on the other side Y2 in the axial direction Y.

[0026] As shown in FIG. 10 , on the first insulator 6 side, the U-phase coil 4 is led out from the slot 3 (position U1 in FIG. 4 ) between the first pillar portion 61 and the third pillar portion 63 that are adjacent in the circumferential direction Z. The U-phase coil end 41 of the U-phase coil 4 is routed from the inner side X2 to the outer side X1 in the radial direction X of the first pillar portion 61. When the U-phase coil end 41 reaches the outer side X1 in the radial direction X of the first pillar portion 61, it is routed in the circumferential direction Z through the first pillar portion 61, the second pillar portion 62, and the third pillar portion 63 in that order. At this time, because the U-phase coil end 41 is routed in the circumferential direction Z between the connecting plate 90 and the first guide portion 51 in the axial direction Y, movement in the axial direction Y is restricted.

[0027] The U-phase coil end 41 that has reached the third pillar section 63 is then routed along from the outside X1 to the inside X2 in the radial direction X of the third pillar section 63, and is introduced into a slot 3 (position U2 in FIG. 4) between the third pillar section 63 and the first pillar section 61 that are adjacent in the circumferential direction Z, i.e., into a slot 3 (position U2 in FIG. 4) that is three slots away in the circumferential direction Z from the previously introduced slot 3 (position U1 in FIG. 4). The U-phase coil 4 is then wound along the axial direction Y from one side Y1 to the other side Y2 in the axial direction Y within the slot 3 (position U2 in FIG. 4).

[0028] Next, when the U-phase coil 4 reaches the other side Y2 in the axial direction Y within the slot 3 (position U2 in FIG. 4), it is led out of the slot 3 (position U2 in FIG. 4) between the third pillar portion 63 and the first pillar portion 61, which are adjacent in the circumferential direction Z, on the second insulator 7 side. The U-phase coil end 41 of the U-phase coil 4 is routed from the inside X2 in the radial direction X of the third pillar portion 63 along the outside X1. When it reaches the outside X1 in the radial direction X of the third pillar portion 63, it is routed in the circumferential direction Z, opposite to the one side Y1 in the axial direction Y, through the third pillar portion 63, the second pillar portion 62, and the first pillar portion 61 in that order. At this time, because the U-phase coil end 41 is routed in the circumferential direction Z between the connecting plate 90 and the first guide portion 51 in the axial direction Y, movement in the axial direction Y is suppressed.

[0029] The U-phase coil end 41 that has reached the first pillar portion 61 is then routed along from the outside X1 to the inside X2 in the radial direction X of the first pillar portion 61 and introduced into a slot 3 (position U1 in FIG. 4) between the first pillar portion 61 and the third pillar portion 63 that are adjacent in the circumferential direction Z. The U-phase coil 4 is then wound along the axial direction Y within the slot 3 (position U1 in FIG. 4) from the other side Y2 to one side Y1 in the axial direction Y. By repeating the above operation, the U-phase coil 4 and U-phase coil end 41 are formed between one slot 3 (position U1 in FIG. 4) and three slots 3 (position U2 in FIG. 4) away from one slot 3 in the circumferential direction Z.

[0030] Next, starting from a slot 3 three slots away in the circumferential direction Z (position U2 in FIG. 4), the above operation is repeated between the slots 3 three slots away in the circumferential direction Z (position U3 in FIG. 4), to form the U-phase coil 4 and the U-phase coil end 41. Furthermore, the above operation is repeated from U3 to U4 in FIG. 4, from U4 to U5 in FIG. 4, from U5 to U6 in FIG. 4, and from U6 to U1 in FIG. 4, to form the U-phase coil 4 and the U-phase coil end 41 all around the stator core 2 in the circumferential direction Z, as shown in FIG. 10.

[0031] Next, as shown in FIG. 11 , on the first insulator 6 side, the V-phase coil 4 is led out from the slot 3 (position V1 in FIG. 4 ) between the first pillar portion 61 and the second pillar portion 62 that are adjacent in the circumferential direction Z. The V-phase coil end 42 of the V-phase coil 4 is routed from the inside X2 to the outside X1 in the radial direction X of the second pillar portion 62. When the V-phase coil end 42 reaches the outside X1 in the radial direction X of the second pillar portion 62, it is routed in the circumferential direction Z through the second pillar portion 62, the third pillar portion 63, and the first pillar portion 61 in that order. At this time, because the V-phase coil end 42 is routed in the circumferential direction Z between the first guide portion 51 and the second guide portion 52 in the axial direction Y, movement of the V-phase coil end 42 in the axial direction Y is restricted.

[0032] The V-phase coil end 42 that has reached the first pillar portion 61 is then routed along from the outside X1 to the inside X2 in the radial direction X of the first pillar portion 61, and introduced into a slot 3 (position V2 in FIG. 4) between the first pillar portion 61 and the second pillar portion 62 that are adjacent in the circumferential direction Z, i.e., into a slot 3 (position V2 in FIG. 4) that is three slots away in the circumferential direction Z from the previously introduced slot 3 (position V1 in FIG. 4). The V-phase coil 4 is then wound along the axial direction Y from one side Y1 to the other side Y2 in the axial direction Y within the slot 3 (position V2 in FIG. 4).

[0033] Next, when the V-phase coil 4 reaches the other side Y2 in the axial direction Y within the slot 3 (position V2 in FIG. 4), it is led out of the slot 3 (position V2 in FIG. 4) between the first pillar portion 61 and the second pillar portion 62 that are adjacent in the circumferential direction Z on the second insulator 7 side. The V-phase coil end 42 of the V-phase coil 4 is routed from the inside X2 in the radial direction X of the first pillar portion 61 along the outside X1. When it reaches the outside X1 in the radial direction X of the first pillar portion 61, it is routed in the circumferential direction Z, opposite to the one side Y1 in the axial direction Y, through the first pillar portion 61, the third pillar portion 63, and the second pillar portion 62 in that order. At this time, because the V-phase coil end 42 is routed in the circumferential direction Z between the first guide portion 51 and the second guide portion 52 in the axial direction Y, movement in the axial direction Y is suppressed.

[0034] The V-phase coil end 42 that has reached the second pillar portion 62 is then routed along from the outside X1 to the inside X2 in the radial direction X of the second pillar portion 62 and introduced into a slot 3 (position V1 in FIG. 4) between the second pillar portion 62 and the first pillar portion 61 that are adjacent in the circumferential direction Z. The V-phase coil 4 is then wound along the axial direction Y within the slot 3 (position V1 in FIG. 4) from the other side Y2 to one side Y1 in the axial direction Y. By repeating the above operation, the V-phase coil 4 and the V-phase coil end 42 are formed between one slot 3 (position V1 in FIG. 4) and three slots 3 (position V2 in FIG. 4) spaced apart in the circumferential direction Z.

[0035] Next, starting from a slot 3 three slots apart in the circumferential direction Z (position V2 in FIG. 4), the above operation is repeated between the slots 3 three slots apart in the circumferential direction Z (position V3 in FIG. 4), to form the V-phase coils 4 and V-phase coil ends 42. Furthermore, the above operation is repeated from V3 to V4 in FIG. 4, from V4 to V5 in FIG. 4, from V5 to V6 in FIG. 4, and from V6 to V1 in FIG. 4, to form the V-phase coils 4 and V-phase coil ends 42 all around the stator core 2 in the circumferential direction Z, as shown in FIG. 11.

[0036] Next, as shown in FIG. 3 , on the first insulator 6 side, the W-phase coil 4 is led out from the slot 3 (position W1 in FIG. 4 ) between the second pillar portion 62 and the third pillar portion 63 that are adjacent in the circumferential direction Z. The W-phase coil end 43 of the W-phase coil 4 is routed from the inner side X2 to the outer side X1 in the radial direction X of the third pillar portion 63. When the W-phase coil end 43 reaches the outer side X1 in the radial direction X of the third pillar portion 63, it is routed in the circumferential direction Z through the third pillar portion 63, the first pillar portion 61, and the second pillar portion 62 in that order. At this time, because the W-phase coil end 43 is routed in the circumferential direction Z between the second guide portion 52 and the protruding portion 53 in the axial direction Y, movement in the axial direction Y is restricted.

[0037] The W-phase coil end 43 that has reached the second pillar portion 62 is then routed along from the outside X1 to the inside X2 in the radial direction X of the second pillar portion 62, and introduced into a slot 3 (position W2 in FIG. 4) between the second pillar portion 62 and the third pillar portion 63 that are adjacent in the circumferential direction Z, i.e., into a slot 3 (position W2 in FIG. 4) that is three slots away in the circumferential direction Z from the previously introduced slot 3 (position W1 in FIG. 4). The W-phase coil 4 is then wound along the axial direction Y from one side Y1 to the other side Y2 in the axial direction Y within the slot 3 (position W2 in FIG. 4).

[0038] Next, when the W-phase coil 4 reaches the other side Y2 in the axial direction Y within the slot 3 (position W2 in FIG. 4), it is led out of the slot 3 (position W2 in FIG. 4) between the second pillar portion 62 and the third pillar portion 63 that are adjacent in the circumferential direction Z on the second insulator 7 side. The W-phase coil end 43 of the W-phase coil 4 is routed from the inner side X2 in the radial direction X of the second pillar portion 62 along the outer side X1. When it reaches the outer side X1 in the radial direction X of the second pillar portion 62, it is routed in the circumferential direction Z, opposite to the one side Y1 in the axial direction Y, through the second pillar portion 62, the first pillar portion 61, and the third pillar portion 63 in that order. At this time, because the W-phase coil end 43 is routed in the circumferential direction Z between the second guide portion 52 and the protruding portion 53 in the axial direction Y, movement in the axial direction Y is suppressed.

[0039] The W-phase coil end 43 that has reached the third pillar portion 63 is then routed along from the outside X1 to the inside X2 in the radial direction X of the third pillar portion 63 and introduced into a slot 3 (position W1 in FIG. 4) between the third pillar portion 63 and the second pillar portion 62 that are adjacent in the circumferential direction Z. The W-phase coil 4 is then wound along the axial direction Y within the slot 3 (position W1 in FIG. 4) from the other side Y2 to one side Y1 in the axial direction Y. By repeating the above operation, the W-phase coil 4 and the W-phase coil end 43 are formed between one slot 3 (position W1 in FIG. 4) and three slots 3 (position W2 in FIG. 4) spaced apart in the circumferential direction Z.

[0040] Next, starting from a slot 3 three slots apart in the circumferential direction Z (position W2 in FIG. 4), the above operation is repeated between the slots 3 three slots apart in the circumferential direction Z (position W3 in FIG. 4), to form the W-phase coil 4 and W-phase coil end 43. The above operation is then repeated from W3 to W4 in FIG. 4, from W4 to W5 in FIG. 4, from W5 to W6 in FIG. 4, and from W6 to W1 in FIG. 4, to form the W-phase coil 4 and W-phase coil end 43 all around the stator core 2 in the circumferential direction Z, as shown in FIG. 3. In this manner, the coil 4 is wound directly around the slots 3 of the stator core 2, and a stator 1 is formed with U-phase, V-phase, and W-phase coils 4 formed therein.

[0041] A rotor 101 is installed on the inner side X2 of the stator 1 in the radial direction X via a gap and rotates on a rotary shaft 102, thereby forming a rotary electric machine 100 as shown in FIG.

[0042] In the first embodiment, an example is shown in which guide portions 50 are provided to separate the phases of the coil ends 40, but this is not limiting, and it is also possible that the pillar portions 9 do not have guide portions 50. In this case, it is also possible to sandwich insulating paper between the phases of the coil ends 40. Therefore, since there is no need to form guide portions 50 on the pillar portions 9, the shape of the insulator 5 is simplified, and the insulator 5 can be manufactured easily and at low cost.

[0043] In addition, in the above embodiment 1, an example is shown in which the guide portion 50 that separates the phases of the coil end 40 is provided in two stages in the axial direction Y, namely, the first guide portion 51 and the second guide portion 52, but this is not limited to this, and it is also possible to provide three or more stages in the axial direction Y.

[0044] Furthermore, in the above-described first embodiment, an example in which the pillar portions 9 are provided with the protrusions 53 has been described, but this is not limiting, and the pillar portions 9 may not be provided with the protrusions 53. In this case, it is possible to address this by reliably locking the coil ends 40 onto the pillar portions 9 so that they do not move in the axial direction Y. In this case, since there is no need to form the protrusions 53 on the pillar portions 9, the shape of the insulator 5 is simplified, and the insulator 5 can be manufactured easily and at low cost. Furthermore, it is also possible to consider a case in which the pillar portions 9 are not provided with either the guide portions 50 or the protrusions 53.

[0045] In the above-described first embodiment, an example has been shown in which each pillar portion 9 is formed from the inner side X2 end in the radial direction X of each tooth portion 21 to the circumference S that connects the outer side X1 in the radial direction X of each slot 3 in a ring shape, but this is not limited to this. If the back yoke portion on the outer side X1 in the radial direction X is smaller than the tooth portion 21, it is also possible to deal with this by shortening the length of the pillar portion 9 in the radial direction X.

[0046] Furthermore, in the above-described first embodiment, an example was shown in which all of the pillar portions 9 are formed from the inner side X2 end in the radial direction X of the tooth portion 21 to the circumference S that connects the outer side X1 in the radial direction X of each slot 3 in an annular shape, but this is not limited to this, and it is also possible to appropriately change the length in the radial direction X and position of each pillar portion 9 depending on the formation position of the coil end 40. In other words, by appropriately changing the pillar portions 9 in this way, it is possible to control the path position of the coil end 40 leading out and leading out of the slot 3 and to control the space factor of the coil 4 in the slot 3.

[0047] Furthermore, in the above-mentioned embodiment 1, an example is shown in which the first guide portion 51 and the second guide portion 52 are provided to separate the phases of the coil ends 40, but this is not limited to this, and it is also possible to make appropriate changes depending on the number of layers that is changed depending on the winding pattern of the coils 4 of the stator 1.

[0048] Furthermore, there are no particular restrictions on the length of each pillar portion 9 in the axial direction Y, and it can be adjusted appropriately depending on the circumferential length of the coil 4. However, if miniaturization is important, the length of each pillar portion 9 in the axial direction Y is formed to the minimum necessary length.

[0049] Furthermore, in the first embodiment described above, an example was shown in which the first reinforcing wall portion 55 and the second reinforcing wall portion 56 are provided, but the present invention is not limited to this, and these are not necessary if the strength of the insulator 5 can be sufficiently ensured when installing the coil end 40. In this case, since there is no need to form the reinforcing wall portions 55, 56, the shape of the insulator 5 is simplified, and the insulator 5 can be manufactured easily and at low cost.

[0050] According to the stator of the first embodiment configured as described above, an annular stator core; a plurality of teeth formed on a radially inner side of the stator core at predetermined intervals in a circumferential direction, the teeth protruding radially inward and extending in an axial direction; a coil wound in slots formed between the teeth; and insulators for guiding coil ends of the coils at both axial ends of the stator core, the insulator includes a column portion on each of the teeth, the column portion extending in a direction away from the stator core in the axial direction, The coil ends of the stator are engaged with the pillars and routed in the circumferential direction. So, Since the coil ends are locked to the pillars, the coils can be formed with a high space factor in the slots.

[0051] Furthermore, according to the stator of the first embodiment configured as described above, The pillar portion is formed from the radially inner end of the tooth portion to a position on a circumference that connects the radially outer sides of each of the slots in an annular shape. So, The coil ends can be locked along the column portion from the inside to the outside in the radial direction, or from the outside to the inside in the radial direction. In other words, the slots can be used up to a position on a circumference that connects the outsides of each slot in a ring shape in the radial direction, so the coil can be formed reliably with a high space factor in the slots.

[0052] Furthermore, according to the stator of the first embodiment configured as described above, Between the pillar portions adjacent in the circumferential direction, there is provided a guide portion for isolating the coil end phases. So, Insulation between the coil end phases can be ensured.

[0053] Furthermore, according to the stator of the first embodiment configured as described above, The pillar portion includes a first pillar portion, a second pillar portion, and a third pillar portion repeatedly arranged in a circumferential direction, The guide portion is It is not formed between the first pillar portion and the third pillar portion that are adjacent in the circumferential direction, a first guide portion formed between the first pillar portion, the second pillar portion, and the third pillar portion that are adjacent in the circumferential direction and that protrudes radially outward; a second guide portion formed between the second pillar portion and the third pillar portion adjacent in the circumferential direction and connected to the first pillar portion without being connected to any other portion, and protruding radially outward; The axial position of the first guide portion is closer to the stator core than the axial position of the second guide portion. So, This ensures reliable insulation between the three-phase coil ends.

[0054] Furthermore, according to the stator of the first embodiment configured as described above, The pillar portion has a protrusion that protrudes radially outward at an end portion that is axially separated from the stator core. So, This can suppress the coil end from moving in the axial direction away from the stator core.

[0055] Furthermore, according to the rotating electric machine of the first embodiment configured as described above, A rotating electric machine comprising: the stator described above; and a rotor disposed radially inside the stator with a gap therebetween. So, By using the stator as described above, a highly efficient rotating electric machine can be obtained.

[0056] Embodiment 2 FIG. 13 is a plan view showing the configuration of an insulator of a stator of a rotating electric machine according to embodiment 2. FIG. 14A is a perspective view showing the configuration of a first split insulator of the first insulator shown in FIG. 13. FIG. 14B is a plan view showing the configuration of the first split insulator shown in FIG. 14A. FIG. 15A is a perspective view showing the configuration of a second split insulator of the second insulator according to embodiment 2. FIG. 15B is a plan view showing the configuration of the second split insulator shown in FIG. 15A. In the figures, parts that are the same as those in embodiment 1 above are given the same reference numerals and their description will be omitted. Furthermore, in embodiment 2, parts that are different from embodiment 1 above will be mainly described, and descriptions of parts that are the same as those in embodiment 1 above will be omitted as appropriate.

[0057] In the above embodiment 1, an example is shown in which the first insulator 6 and the second insulator 7 are each formed integrally in an annular shape, but this is not limited to this, and it is also possible that the first insulator 6 and the second insulator 7 are formed by dividing them into multiple pieces in the circumferential direction Z.

[0058] 13, the first insulator 6 includes a first pillar portion 61, a second pillar portion 62, and a third pillar portion 63 adjacent to each other in the circumferential direction Z, and includes a plurality of (here, six) first divided insulators 501 that are separated as a set. Note that the second insulator 7 is also divided in the circumferential direction Z in a similar manner.

[0059] As shown in FIG. 14 , one first split insulator 501 of the first insulator 6 includes one first pillar portion 61, one second pillar portion 62, and one third pillar portion 63, and is formed as a set. Furthermore, the first guide portion 51, the second guide portion 52, and the protruding portion 53 are each formed in the same manner as in the first embodiment. Furthermore, one second split insulator 502 of the second insulator 7 includes one first pillar portion 61, one second pillar portion 62, and one third pillar portion 63, and is formed as a set. Furthermore, the first guide portion 51, the second guide portion 52, and the protruding portion 53 are each formed in the same manner as in the first embodiment.

[0060] A plurality of these first divided insulators 501, 502 (six in this example) are arranged in the circumferential direction Z, and the first divided insulators 501, 502 are joined in the circumferential direction Z using a general joining method such as thermal welding, laser welding, or crimping to form the first insulator 6 and the second insulator 7, respectively. However, if there is no cause for misalignment, joining is not necessary.

[0061] In this way, by forming the first insulator 6 and the second insulator 7 using the first split insulators 501, 502, they can be attached and detached in case of interference with a winding machine when winding the coil 4 or to improve productivity. It is also possible to split only one of the first insulator 6 or the second insulator 7 in the circumferential direction Z. There are no restrictions on the position at which they are split in the circumferential direction Z. In addition to the examples shown above, for example, two each of the first columnar portions 61, the second columnar portions 62, and the third columnar portions 63 may be formed as a set and split in the circumferential direction Z. It is also possible to form three each of the first columnar portions 61, the second columnar portions 62, and the third columnar portions 63 as a set and split them in the circumferential direction Z.

[0062] The stator 1 of the second embodiment configured as described above has the same effects as those of the first embodiment, and also has the following advantages: The insulator is divided in the circumferential direction. So, The degree of freedom in winding the coil is improved.

[0063] Embodiment 3 Fig. 16 is a perspective view showing a state in which an insulator is installed in a stator core of a stator of a rotating electric machine according to embodiment 3. Fig. 17 is a perspective view showing a configuration of the insulator of the stator shown in Fig. 16. Fig. 18 is a plan view showing the configuration of the insulator shown in Fig. 17. Fig. 19 is a perspective view showing a state in which a U-phase coil is formed in a state in which an insulator is installed in the stator core of the stator of the rotating electric machine shown in Fig. 16. Fig. 20 is a perspective view showing a state in which a V-phase coil is formed in the stator core and insulator shown in Fig. 19.

[0064] FIG. 21 is a perspective view showing a state in which a W-phase coil is formed on the stator core and insulator shown in FIG. 20. FIG. 22A is a perspective view showing the configuration of a split insulator obtained by circumferentially splitting the insulator shown in FIG. 17. FIG. 22B is a plan view showing the configuration of the split insulator shown in FIG. 22A. In the figure, parts that are the same as those in the above-mentioned embodiments are given the same reference numerals and their description will be omitted. Furthermore, in this third embodiment, parts that are different from the above-mentioned embodiments will be mainly described, and descriptions of parts that are the same as those in the above-mentioned embodiments will be omitted as appropriate.

[0065] In the third embodiment, a plurality of pillar portions 9 extending in a direction away from the stator core 2 in the axial direction Y are formed on each tooth portion 21 at preset intervals in the radial direction X. Here, four pillar portions 9, namely a first pillar portion 81, a second pillar portion 82, a third pillar portion 83, and a fourth pillar portion 84, are formed on one tooth portion 21 from the outer side X1 in the radial direction X. The pillar portions 81, 82, 83, and 84 are formed on a connecting plate 90. The coil ends 40 (see FIG. 21 ) are respectively engaged between the first pillar portion 81 and the second pillar portion 82, between the second pillar portion 82 and the third pillar portion 83, and between the third pillar portion 83 and the fourth pillar portion 84, which are adjacent to each other in the radial direction X, and are routed in the circumferential direction Z.

[0066] The first pillar portion 81, second pillar portion 82, third pillar portion 83, and fourth pillar portion 84 formed in multiple numbers on one tooth portion 21 are arranged at predetermined intervals from the inner end X2 of the tooth portion 21 in the radial direction X to a position on the circumference S that connects the outer sides X1 of each slot 3 in the radial direction X in a ring shape.

[0067] Moreover, each of the pillar portions 81, 82, 83, and 84 is formed in a tapered shape, for example, a thorn-like shape, when viewed in the radial direction X, that becomes smaller in the direction away from the stator core 2 in the axial direction Y. Furthermore, each of the pillar portions 81, 82, 83, and 84 formed in plurality on one tooth portion 21 is formed continuously in the radial direction X on the stator core 2 side in the axial direction Y. Since the insulator 5 is configured as described above, in the third embodiment, the insulators 5 installed on one side Y1 and the other side Y2 in the axial direction Y of the stator core 2 are formed in the same shape.

[0068] Next, a method for manufacturing the stator 1 according to the third embodiment will be described. First, as shown in Fig. 16, the insulators 5 are respectively installed on both ends of the stator core 2 in the axial direction Y (Fig. 16). For example, the installation and fixing of each insulator 5 to the stator core 2 can be performed by fitting each insulator 5 into the slot 3 of the stator core 2, or by molding each insulator 5 integrally with the stator core 2 and fixing the insulators together when molding them.

[0069] Next, the U-phase, V-phase, and W-phase coils 4 are wound in order. First, as an example, a case where winding is performed starting from slot 3 U1 in FIG. 18 will be described with reference to FIG. 19. Note that U1 to U6, V1 to V6, and W1 to W6 in FIG. 18 indicate the position of each slot 3. Also, while FIG. 18 shows one side Y1 in the axial direction Y, the positional relationship of each slot 3 is the same on the other side Y2 in the axial direction Y.

[0070] As shown in Fig. 19, on one side Y1 in the axial direction Y, the U-phase coil 4 is led out from the slot 3 at the position U1 in Fig. 18. The U-phase coil end 41 of the U-phase coil 4 is routed in the circumferential direction Z between the first pillar portion 81 and the second pillar portion 82 in the radial direction X. At this time, the U-phase coil end 41 is sandwiched between the first pillar portion 81 and the second pillar portion 82, and therefore its movement in the radial direction X is restricted.

[0071] Then, when it reaches the slot 3 at position U2 in Fig. 18, that is, it is introduced into the slot 3 (position U2 in Fig. 18) that is three slots away in the circumferential direction Z from the previously introduced slot 3 (position U1 in Fig. 18).The U-phase coil 4 is then wound along the axial direction Y from one side Y1 to the other side Y2 in the axial direction Y within the slot 3 (position U2 in Fig. 18).

[0072] Next, when the U-phase coil 4 reaches the other side Y2 in the axial direction Y within the slot 3 (position U2 in FIG. 18), it is led out of the slot 3 at position U2 in FIG. 18. Then, on the other side Y2 in the axial direction Y, the U-phase coil end 41 of the U-phase coil 4 is routed between the first pillar portion 81 and the second pillar portion 82 in the radial direction X in the circumferential direction Z, which is the opposite side to the one side Y1 in the axial direction Y shown above. At this time, the U-phase coil end 41 is sandwiched between the first pillar portion 81 and the second pillar portion 82, and therefore its movement in the radial direction X is restricted.

[0073] 18, it is introduced into the slot 3. The U-phase coil 4 is then wound along the axial direction Y from the other side Y2 to one side Y1 in the axial direction Y within the slot 3 (position U1 in FIG. 18). The above operation is repeated to form the U-phase coil 4 and U-phase coil end 41 between one slot 3 (position U1 in FIG. 18) and three slots 3 (position U2 in FIG. 18) away in the circumferential direction Z.

[0074] Next, starting from a slot 3 three slots away in the circumferential direction Z (position U2 in FIG. 18), the above operation is repeated between the slots 3 three slots away in the circumferential direction Z (position U3 in FIG. 18), to form the U-phase coil 4 and U-phase coil end 41. Furthermore, the above operation is repeated from U3 to U4 in FIG. 18, from U4 to U5 in FIG. 18, from U5 to U6 in FIG. 18, and from U6 to U1 in FIG. 18, to form the U-phase coil 4 and U-phase coil end 41 all around the stator core 2 in the circumferential direction Z, as shown in FIG. 19.

[0075] Next, as shown in Fig. 20, on one side Y1 in the axial direction Y, the V-phase coil 4 is led out from the slot 3 at the position V1 in Fig. 18. The V-phase coil end 42 of the V-phase coil 4 is routed in the circumferential direction Z between the first pillar portion 81 and the second pillar portion 82 in the radial direction X. At this time, the V-phase coil end 42 is sandwiched between the second pillar portion 82 and the third pillar portion 83, and therefore its movement in the radial direction X is restricted.

[0076] Then, when it reaches the slot 3 at position V2 in Fig. 18, that is, it is introduced into the slot 3 (position V2 in Fig. 18) that is three slots away in the circumferential direction Z from the previously introduced slot 3 (position V1 in Fig. 18).The V-phase coil 4 is then wound along the axial direction Y from one side Y1 to the other side Y2 in the axial direction Y within the slot 3 (position V2 in Fig. 18).

[0077] Next, when the V-phase coil 4 reaches the other side Y2 in the axial direction Y within the slot 3 (position V2 in FIG. 18), it is led out of the slot 3 at position V2 in FIG. 18. Then, on the other side Y2 in the axial direction Y, the V-phase coil end 42 of the V-phase coil 4 is routed between the second pillar portion 82 and the third pillar portion 83 in the radial direction X in the circumferential direction Z, which is the opposite side to the one side Y1 in the axial direction Y shown above. At this time, the V-phase coil end 42 is sandwiched between the second pillar portion 82 and the third pillar portion 83, and therefore its movement in the radial direction X is restricted.

[0078] 18, it is introduced into the slot 3. The V-phase coil 4 is then wound along the axial direction Y from the other side Y2 in the axial direction Y to one side Y1 in the slot 3 (position V1 in FIG. 18). The above operation is repeated to form the V-phase coil 4 and V-phase coil end 42 between one slot 3 (position V1 in FIG. 18) and three slots 3 (position V2 in FIG. 18) away in the circumferential direction Z.

[0079] Next, starting from a slot 3 three slots apart in the circumferential direction Z (position V2 in FIG. 18), the above operation is repeated between the slot 3 three slots apart in the circumferential direction Z (position V3 in FIG. 18), to form the V-phase coils 4 and V-phase coil ends 42. Furthermore, the above operation is repeated from V3 to V4 in FIG. 18, from V4 to V5 in FIG. 18, from V5 to V6 in FIG. 18, and from V6 to V1 in FIG. 18, to form the V-phase coils 4 and V-phase coil ends 42 all around the stator core 2 in the circumferential direction Z, as shown in FIG. 20.

[0080] Next, as shown in Fig. 21 , on one side Y1 in the axial direction Y, the W-phase coil 4 is led out from the slot 3 at the position W1 in Fig. 18. The W-phase coil end 43 of the W-phase coil 4 is routed in the circumferential direction Z between the first pillar portion 81 and the second pillar portion 82 in the radial direction X. At this time, the W-phase coil end 43 is sandwiched between the third pillar portion 83 and the fourth pillar portion 84, and therefore its movement in the radial direction X is restricted.

[0081] Then, when it reaches the slot 3 at position W2 in Fig. 18, that is, it is introduced into the slot 3 (position W2 in Fig. 18) that is three slots away in the circumferential direction Z from the previously introduced slot 3 (position W1 in Fig. 18).The W-phase coil 4 is then wound along the axial direction Y from one side Y1 to the other side Y2 in the axial direction Y within the slot 3 (position W2 in Fig. 18).

[0082] Next, when the W-phase coil 4 reaches the other side Y2 in the axial direction Y within the slot 3 (position W2 in FIG. 18), it is led out of the slot 3 at position W2 in FIG. 18. Then, on the other side Y2 in the axial direction Y, the W-phase coil end 43 of the W-phase coil 4 is routed between the third pillar portion 83 and the fourth pillar portion 84 in the radial direction X in the circumferential direction Z, which is opposite to the one side Y1 in the axial direction Y shown above. At this time, the W-phase coil end 43 is sandwiched between the third pillar portion 83 and the fourth pillar portion 84, and therefore its movement in the radial direction X is restricted.

[0083] 18, it is introduced into the slot 3. The W-phase coil 4 is then wound along the axial direction Y from the other side Y2 in the axial direction Y to one side Y1 in the slot 3 (position W1 in FIG. 18). The above operation is repeated to form the W-phase coil 4 and the W-phase coil end 43 between one slot 3 (position W1 in FIG. 18) and the slot 3 three slots away in the circumferential direction Z (position W2 in FIG. 18).

[0084] Next, starting from a slot 3 three slots apart in the circumferential direction Z (position W2 in FIG. 18 ), the above operation is repeated between the slots 3 three slots apart in the circumferential direction Z (position W3 in FIG. 18 ), to form the W-phase coil 4 and W-phase coil end 43. The above operation is then repeated from W3 to W4 in FIG. 18 , from W4 to W5 in FIG. 18 , from W5 to W6 in FIG. 18 , and from W6 to W1 in FIG. 18 , to form the W-phase coil 4 and W-phase coil end 43 all around the stator core 2 in the circumferential direction Z, as shown in FIG. 20 . In this manner, the coil 4 is wound directly around the slots 3 of the stator core 2, and a stator 1 is formed with W-phase, W-phase, and W-phase coils 4 formed therein.

[0085] The coil ends 41, 42, and 43 of each phase are wound in the radial direction X between the first pillar portion 81 and the second pillar portion 82, between the second pillar portion 82 and the third pillar portion 83, and between the third pillar portion 83 and the fourth pillar portion 84, respectively. This allows the winding to be performed in a spaced (insulated) relationship without interference, and the pillar portions 81, 82, 83, and 84 serve as guides (markers) during winding. Furthermore, the coil ends 41, 42, and 43 of each phase are routed in order from the outer side X1 to the inner side X2 in the radial direction X, further preventing interference during winding. Therefore, the winding positions of the coil ends 41, 42, and 43 of each phase can be wound at approximately the same position in the axial direction Y. A rotor 101, which is installed with a gap between them and rotates on a rotating shaft 102, is installed on the inner side X2 in the radial direction X of the stator 1, forming a rotating electric machine 100 as shown in FIG. 12 .

[0086] In the third embodiment, since the guide portion 50 is not required as in the above-described embodiments, the insulators 5 can have the same shape at both ends of the stator core 2 in the axial direction Y. Furthermore, since the guide portion 50 is not required, the structure of the insulator 5 can be simplified. Moreover, since the column portion 9 itself is formed in a thorn shape and has a draft angle, improvement in productivity in the injection molding of the insulator 5 can be expected.

[0087] Furthermore, in the third embodiment, an example has been shown in which the insulator 5 is configured as an annular unit, but this is not limiting, and the insulator 5 can also be divided in the circumferential direction Z. Specifically, as shown in Fig. 22, the insulator 5 is divided into segments corresponding to each tooth portion 21 to form divided insulators 503. Similar to the third embodiment, each divided insulator 503 includes one each of a first pillar portion 81, a second pillar portion 82, a third pillar portion 83, and a fourth pillar portion 84, and is formed as a set.

[0088] These split insulators 503 are arranged in the same number as the tooth portions 21, 18 in this case, and the split insulators 503 are joined in the circumferential direction Z using a general joining method such as thermal welding, laser welding, or crimping to form the insulator 5. However, if there is no cause for misalignment, joining is not necessary.

[0089] By forming the insulator 5 using the split insulator 503 in this way, it becomes possible to attach and detach the insulator 5 in case of interference with a winding machine during winding or to improve productivity. It is also possible to split only one of the insulators 5 installed at both ends of the axial direction Y of the stator core 2 in the circumferential direction Z. There are no restrictions on the position of the split in the circumferential direction Z. In addition to the example described above, for example, two first pillar portions 81, two second pillar portions 82, two third pillar portions 83, and two fourth pillar portions 84 may be formed as a set for every two teeth portions 21, and then split in the circumferential direction Z. It is also possible to form three first pillar portions 81, two second pillar portions 82, two third pillar portions 83, and two fourth pillar portions 84 as a set for every three teeth portions 21, and then split in the circumferential direction Z.

[0090] In the example shown, the positions on the circumference that connects the first pillar portion 81, the second pillar portion 82, the third pillar portion 83, and the fourth pillar portion 84 on each tooth portion 21 in a ring shape are formed on the same circumference between each tooth portion 21, but this is not limited to this, and it is also possible for the radial positions X of the first pillar portion 81, the second pillar portion 82, the third pillar portion 83, and the fourth pillar portion 84 for each tooth portion 21 to be arranged on different circumferences between each tooth portion 21.

[0091] The stator of the third embodiment configured as described above has the same effects as those of the above embodiments, and also has the following advantages: a plurality of the pillar portions are formed on each of the teeth at predetermined intervals in the radial direction, The coil end is engaged between the pillar portions adjacent in the radial direction. So, In one tooth, the coil end can be locked between multiple pillars formed in the radial direction. This simplifies the locking of the coil ends and simplifies the winding of the coil.

[0092] Furthermore, according to the stator of the third embodiment configured as described above, The plurality of pillar portions formed on one tooth portion are The slots are arranged at predetermined intervals from the radially inner end of the tooth portion to a position on a circumference that connects the radially outer sides of each slot in an annular shape. So, The coil winding can be made to have a high space factor.

[0093] Furthermore, according to the stator of the third embodiment configured as described above, The pillar portion is formed in a tapered shape when viewed from a radial direction, the tapered shape becoming smaller in the direction away from the stator core in the axial direction. So, In one tooth portion, the coil end can be locked between a plurality of pillar portions formed in the radial direction.

[0094] Furthermore, according to the stator of the third embodiment configured as described above, The plurality of pillar portions formed on one tooth portion are On the axial side of the stator core, the stator core is formed continuously in the radial direction. So, In one tooth portion, a plurality of pillar portions formed in the radial direction can be easily installed on the stator core.

[0095] Furthermore, the stator of the third embodiment configured as described above has the same effects as those of the above embodiments, and also has the following advantages: The insulator is divided in the circumferential direction. So, The degree of freedom in winding the coil is improved.

[0096] While the present disclosure describes various exemplary embodiments and examples, the various features, aspects, and functions described in one or more embodiments are not limited to application to a particular embodiment, but may be applied to the embodiments alone or in various combinations. Therefore, countless variations not exemplified are conceivable within the scope of the technology disclosed in this specification, including, for example, cases where at least one component is modified, added, or omitted, and cases where at least one component is extracted and combined with components of another embodiment.

[0097] Various aspects of the present disclosure are summarized below as appendices.

[0098] (Appendix 1) an annular stator core; a plurality of teeth formed on a radially inner side of the stator core at predetermined intervals in a circumferential direction, the teeth protruding radially inward and extending in an axial direction; a coil wound in slots formed between the teeth; and insulators for guiding coil ends of the coils at both axial ends of the stator core, the insulator includes a column portion on each of the teeth, the column portion extending in a direction away from the stator core in the axial direction, The coil ends of the stator are engaged with the pillars and routed in the circumferential direction. (Appendix 2) 2. The stator according to claim 1, wherein the pillar portion is formed from a radially inner end of the tooth portion to a position on a circumference that connects the radially outer sides of each of the slots in an annular shape. (Appendix 3) 3. The stator according to claim 1, wherein a guide portion is provided between the pillar portions adjacent in the circumferential direction to separate the coil ends from each other. (Appendix 4) The pillar portion includes a first pillar portion, a second pillar portion, and a third pillar portion repeatedly arranged in a circumferential direction, The guide portion is It is not formed between the first pillar portion and the third pillar portion that are adjacent in the circumferential direction, a first guide portion formed between the first pillar portion, the second pillar portion, and the third pillar portion that are adjacent in the circumferential direction and that protrudes radially outward; a second guide portion formed between the second pillar portion and the third pillar portion adjacent in the circumferential direction and connected to the first pillar portion without being connected to any other portion, and protruding radially outward; 4. The stator according to claim 3, wherein the first guide portion is positioned closer to the stator core in the axial direction than the second guide portion is positioned in the axial direction. (Appendix 5) 5. The stator according to claim 1, wherein the pillar portion has a protrusion that protrudes radially outward at an end portion that is axially away from the stator core. (Appendix 6) a plurality of the pillar portions are formed on each of the teeth at predetermined intervals in the radial direction, 2. The stator according to claim 1, wherein the coil end is engaged between the pillar portions adjacent in the radial direction. (Appendix 7) The plurality of pillar portions formed on one tooth portion are 7. A stator as described in Appendix 6, wherein the teeth are arranged at predetermined intervals from the radially inner end of the tooth portion to a position on a circumference that connects the radially outer sides of each of the slots in a ring shape. (Appendix 8) 8. The stator according to claim 6, wherein the pillar portion has a tapered shape when viewed from a radial direction, the tapered shape becoming smaller in the direction away from the stator core in the axial direction. (Appendix 9) The plurality of pillar portions formed on one tooth portion are 9. The stator according to claim 6, wherein the stator core is formed radially continuously on the axial side of the stator core. (Appendix 10) 10. The stator according to any one of claims 1 to 9, wherein the insulator is divided in a circumferential direction. (Appendix 11) A rotating electric machine comprising: the stator according to any one of Supplementary Note 1 to Supplementary Note 10; and a rotor disposed radially inside the stator with a gap therebetween. [Explanation of symbols]

[0099] 1 stator, 100 rotating electric machine, 101 rotor, 102 rotating shaft, 2 stator cores, 21 teeth, 3 slots, 4 coils, 40 coil end, 41 U-phase coil end, 42 V-phase coil end, 43 W-phase coil end, 5 insulator, 50 guide part, 501 first split insulator, 502 second split insulator, 503 split insulator, 51 first guide portion, 52 second guide portion, 55 First reinforcing wall portion, 56 Second reinforcing wall portion, 6 First insulator, 61 First pillar portion, 62 Second pillar portion, 63 Third pillar portion, 7 Second insulator, 81 First pillar portion, 82 Second column, 83 Third column, 84 Fourth column, 9th column, 90 Connecting plate, X-axis direction, X1 outer side, X2 inner side, Y-axis direction, Z-axis direction.

Claims

1. an annular stator core; a plurality of teeth formed on a radially inner side of the stator core at predetermined intervals in a circumferential direction, the teeth protruding radially inward and extending in an axial direction; a coil wound in slots formed between the teeth; and insulators for guiding coil ends of the coils at both axial ends of the stator core, the insulator includes a column portion on each of the teeth, the column portion extending in a direction away from the stator core in the axial direction, The coil ends of the stator are engaged with the pillars and routed in the circumferential direction.

2. The stator according to claim 1 , wherein the pillar portions are formed from radially inner ends of the teeth to positions on a circumference that connects radially outer sides of each of the slots in an annular shape.

3. The stator according to claim 1 , wherein a guide portion is provided between the pillar portions adjacent in the circumferential direction to separate the coil ends of the phases.

4. The pillar portions include a first pillar portion, a second pillar portion, and a third pillar portion repeatedly arranged in a circumferential direction, The guide portion is It is not formed between the first pillar portion and the third pillar portion that are adjacent in the circumferential direction, a first guide portion formed between the first pillar portion, the second pillar portion, and the third pillar portion adjacent in the circumferential direction and connected in the circumferential direction, the first guide portion protruding radially outward; a second guide portion formed between the second pillar portion and the third pillar portion adjacent to each other in the circumferential direction and connected to each other in the circumferential direction, and formed on the first pillar portion without being connected to any other portion, and protruding radially outward; The stator according to claim 3 , wherein the first guide portion is positioned closer to the stator core in the axial direction than the second guide portion is positioned in the axial direction.

5. The stator according to claim 1 , wherein the pillar portion has a protrusion that protrudes radially outward at an end portion that is axially spaced from the stator core.

6. a plurality of the pillar portions are formed on each of the teeth at predetermined intervals in the radial direction, The stator according to claim 1 , wherein the coil ends are engaged between the pillar portions adjacent in the radial direction.

7. The plurality of pillar portions formed on one tooth portion are 7. The stator according to claim 6, wherein the teeth are arranged at predetermined intervals from the radially inner ends of the teeth to positions on a circumference that connects the radially outer sides of each of the slots in an annular shape.

8. The stator according to claim 6, wherein the pillar portions are formed in a tapered shape when viewed in a radial direction, the tapered shape becoming smaller in a direction away from the stator core in the axial direction.

9. The plurality of pillar portions formed on one tooth portion are 7. The stator according to claim 6, wherein the stator core is formed so as to be continuous in the radial direction on the axial side of the stator core.

10. The stator according to claim 1 , wherein the insulator is divided in a circumferential direction.

11. A rotating electric machine comprising: the stator according to any one of claims 1 to 10; and a rotor disposed radially inside the stator with a gap therebetween.

Images