JP2005312207A - Stator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make the terminal of the stator segment of each phase common. <P>SOLUTION: In the stator where the stator segment 41 is constituted by winding a stator coil 44 around an insulated bobbin 43 fitted over a split core 42, an annular stator group is constituted by arranging a plurality of the stator segments 41 annularly, an annular power distribution member is fixed to the annular stator group, and the feeder of each phase of the power distribution member and the stator coil 44 are connected through a terminal 61 secured to the insulated bobbin 43, the feeders are arranged while being shifted in the axial direction of the stator for every phase, each feeder is provided with a terminal extending in the diametral direction of the stator, and the terminal 61 has a first joint 61b connected with one end 44a of the stator coil 44, and a second joint 61c having an axial length connectable with the terminal of the feeder of any phase. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a stator used in a rotating electric machine such as an electric motor or a generator.

In a stator such as an electric motor, a stator coil is formed by winding an insulating bobbin fitted around a split iron core to form a stator piece, and a plurality of the stator pieces are arranged in an annular shape to form an annular stator group. An annular power distribution member is attached to the stator group, and a terminal portion of a power supply line (bus ring) of each phase in the power distribution member is connected to one end of the stator coil via a terminal fixed to an insulating bobbin. One in which the other ends of the stator coils are connected to each other via a midpoint terminal fixed to an insulating bobbin is known (for example, see Patent Document 1).
JP 2001-25198 A

However, in the conventional stator, since the power supply lines of the power distribution member are shifted from each other in the axial direction of the stator for each phase, in order to connect the terminal portion of the power supply line and the connector, for each phase It was necessary to change the size and shape of the terminal portion or to change the size and shape of the connector for each phase. In any case, it was necessary to prepare various members.
Further, in the stator, the other ends of the two stator coils are separately caulked and fixed to the caulking portion of the midpoint terminal, and the connection work is complicated.
Accordingly, the present invention provides a stator capable of sharing parts and improving productivity.

In order to solve the above-mentioned problem, the invention according to claim 1 is directed to an insulating bobbin (for example, an insulating bobbin 43 in an embodiment described later) fitted on a split iron core (for example, a divided core 42 in an embodiment described later). A stator piece (for example, a stator piece 41 in an embodiment described later) is formed by winding a coil (for example, a stator coil 44 in an embodiment described later), and a plurality of the stator pieces are arranged in an annular shape to form an annular stator group. (For example, an annular stator group 40 in an embodiment described later) is configured, and an annular power distribution member (for example, a power distribution member 70 in an embodiment described later) is attached to the annular stator group, and supply of each phase of the power distribution member is performed. Electric wires (for example, bus rings 71U, 71V, 71W in the embodiments described later) and the stator coil are fixed to the insulating bobbin. A stator (for example, a stator 1 in an embodiment to be described later) connected via a terminal (for example, a terminal 61 in an embodiment to be described later), and the feed line is shifted in the axial direction of the stator for each phase. Each feeder line is provided with a terminal portion (for example, a terminal portion 72a in an embodiment described later) extending in the diameter direction of the stator, and the terminal has one end of the stator coil (for example, an embodiment described later). The first connecting portion (for example, the first connecting portion 61b in the embodiment described later) connected to the one end 44a) in the example and an axial length that can be connected to the terminal portion of any phase of the feeder line A second connecting portion (for example, a second connecting portion 61c in an embodiment described later) is provided.
By comprising in this way, the terminal part of any phase of the power distribution member arranged shifted in the axial direction of the stator can be connected by the second connection part of the terminal, and the terminal can be shared. .

According to a second aspect of the present invention, in the first aspect of the invention, the second connection portion is a pair of arms disposed opposite to each other along the axial direction of the stator (for example, 61d and 61d in the embodiments described later). The terminal portion is sandwiched and connected by the pair of arms.
By comprising in this way, the terminal part of any phase of the power distribution member arrange | positioned shifted | deviated to the axial direction of a stator can be clamped by the two arms in the 2nd connection part of a terminal, and can be connected reliably. .

The invention according to claim 3 is the invention according to claim 1 or claim 2, wherein the power distribution member is a ring-shaped multiple-phase feeder line having the same diameter (for example, bus rings 71U and 71V in the embodiments described later). , 71W) are bundled at a predetermined interval in the circumferential direction by a binding member (for example, a resin mold portion 73 in an embodiment described later).
By comprising in this way, the terminal part of any phase of the distribution member which is lightweight and easy to construct can be connected by the second connection part of the terminal.

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the other end of the stator coil (for example, the other end 44b in an embodiment described later) is connected to the insulating bobbin. A midpoint terminal to be connected (for example, the midpoint terminal 62 in the embodiment described later) is fixed, and this midpoint terminal is connected to a connection portion (for example, by sandwiching the other end of two adjacent stator coils together) A connecting portion 62b) in an embodiment to be described later is provided.
By comprising in this way, the connection operation | work of the connection part of the other end of two adjacent stator coils and a midpoint terminal can be performed by one process.

According to the invention which concerns on Claim 1 and Claim 3, the terminal in the stator piece of any phase should just be the same, and sharing of a terminal is attained.
According to the invention which concerns on Claim 2, the terminal part of any phase of a power distribution member can be clamped by the two arms in the 2nd connection part of a terminal, and can be connected reliably.
According to the invention which concerns on Claim 4, since the connection operation | work of the connection part of the other end of two adjacent stator coils and a midpoint terminal can be performed by one process, productivity improves.

Embodiments of the stator according to the present invention will be described below with reference to the drawings of FIGS.
The stator in this embodiment is used in an electric motor for driving a hybrid vehicle. FIG. 1 is a schematic diagram of a drive system of a hybrid vehicle. The hybrid vehicle includes an internal combustion engine (engine) 2 and an electric motor (rotating electric machine) 3 as drive sources, and a rotor 5 that rotates inside the stator 1 in the electric motor 3 includes: The output shaft 2a of the internal combustion engine 2 and the input shaft 4a of the transmission 4 are connected. The driving force of the internal combustion engine 2 and the electric motor 3 is transmitted to driving wheels (wheels) 6 via the transmission 4, and the hybrid vehicle travels using at least one of the power of the internal combustion engine 2 and the electric motor 3 as a driving force. Further, in this hybrid vehicle, when driving force is transmitted from the driving wheel 6 side to the electric motor 3 side during deceleration, the electric motor 3 functions as a generator, and a power storage device (not shown) uses the kinetic energy of the vehicle body as electric energy by regenerative braking. To recover.

2 is a front view of the stator 1 as viewed from the internal combustion engine 2 side, FIGS. 3 and 4 are enlarged front views of the main part, FIG. 5 is a longitudinal sectional view of the same, and FIG. 6 is an enlarged sectional view of the main part. 1 includes a housing 10, a stator holder 20, an annular stator group 40 in which stator pieces 41 are annularly arranged, and an annular power distribution member 70.
The housing 10 forms the housing of the electric motor 3 and is sandwiched between the internal combustion engine 2 and the transmission 4 and is connected and fixed thereto.
The internal space 13 of the housing 10 is formed in a shape that can accommodate the stator holder 20 and the annular stator group 40, and a bolt for fixing the stator holder 20 is connected to the inner peripheral portion of the housing 10 connected to the transmission 4. A plurality (six in this embodiment) of bosses (fixed portions) 12 having holes 11 are provided at predetermined positions in the circumferential direction. Further, the housing 10 includes a terminal box 14 that is continuous with the internal space 13.

  As shown in FIG. 7 and FIG. 8, the stator holder 20 includes a cylindrical portion 21 and a flange portion 22 provided so as to protrude radially outward at one end side in the axial direction. The flange portion 22 is provided with a through hole 23 at a position corresponding to the bolt hole 11 of the housing 10. The stator holder 20 is accommodated in the housing 10 with the flange portion 22 on the transmission 4 side and the cylinder portion 21 on the internal combustion engine 2 side, and the flange portion 22 on the internal combustion engine 2 side (in the axial direction) of the boss 12. The bolt 24 inserted through the through hole 23 is screwed into the bolt hole 11 so as to match the end surface, thereby being fixed to the housing 10.

  Note that two of the six bolts 24 that fix the stator holder 20 to the housing 10 pass through a cylindrical knock pipe 25 as shown in FIG. 6, and the corresponding through hole 23 is a knock pipe. The corresponding bolt hole 11 is formed with a knock hole 15 into which the knock pipe 25 can be inserted.

As shown in FIG. 9, the cylindrical portion 21 of the stator holder 20 is a small-diameter cylindrical portion (fitting cylindrical portion) 26 having a straight flange portion 22 side, and a large-diameter cylindrical portion 27 having a straight axially opposite side to the flange portion 22. The small diameter cylindrical portion 26 and the large diameter cylindrical portion 27 are connected by a tapered cylindrical portion 28. The large-diameter cylindrical portion 27 and the tapered cylindrical portion 28, and the tapered cylindrical portion 28 and the small-diameter cylindrical portion 26 are all smoothly connected by arcuate surfaces 29a and 29b. The inner diameter of the large-diameter cylindrical portion 27 is larger than the outer diameter of the yoke 42b of the split core 42 described later, and the inner diameter of the small-diameter cylindrical portion 26 is set slightly smaller than the outer diameter of the yoke 42b to such an extent that the yoke 42b can be press-fitted. ing.
In this embodiment, the tapered cylindrical portion 28 and the circular arc surfaces 29a and 29b constitute a reduced diameter portion 30 in which the inner diameter of the stator holder 20 is continuously reduced toward one end side in the axial direction (flange portion 22 side). A small diameter cylindrical portion 26 having a constant inner diameter is connected to the small diameter side of the circular arc surface 29b. Further, the large diameter cylindrical portion 27 and the reduced diameter portion 30 constitute an introduction portion 31.
Further, at a predetermined circumferential position of the stator holder 20, a protrusion 32 extending in the axial direction is provided so as to protrude radially inward across a part of the large-diameter cylindrical portion 27 from the tapered cylindrical portion 28. This protrusion 32 is for positioning in the circumferential direction with respect to the annular stator group 40.

The annular stator group 40 is configured by arranging a predetermined number of stator pieces 41 in an annular shape. FIG. 10 is an assembly view of the stator piece 41, and FIG. 11 is an exploded view thereof. The stator piece 41 includes a split iron core 42 formed by laminating silicon steel plates punched in a substantially T shape, and an outer surface of the split iron core 42. The insulating bobbin 43 made of resin is fitted, and the stator coil 44 is wound around the insulating bobbin 43.
The split iron core 42 includes a tooth 42a and a yoke 42b, a substantially semicircular convex portion 42c is formed on one end side in the circumferential direction of the yoke 42b, and a substantially semicircular concave portion 42d is formed on the other end side. When the stator pieces 41, 41,... Are arranged in an annular shape, the convex portion 42c of the yoke 42b is fitted into the concave portion 42d of the adjacent yoke 42b, and all the yokes 42b are connected in a perfect circle.
Further, a groove 42e extending along the stacking direction of the divided cores 42 is provided on the outer peripheral surface of the yoke 42b. By inserting the protrusions 32 of the stator holder 20 into the groove 42e, an annular stator with respect to the stator holder 20 is provided. The circumferential position of the group 40 is positioned.

  As shown in FIG. 11, the insulating bobbin 43 is divided into two in the axial direction of the stator 1 (stacking direction of the divided iron cores 42), but in the following description, it will be described in a state where they are combined into one member. The insulating bobbin 43 extends from the bobbin portion 45 to the yoke 42b side of the split iron core 42 on one end side in the stacking direction of the split iron core 42, and is fitted to the teeth 42a of the split iron core 42. Are provided with a distribution wall portion 46 having a substantially inverted L-shaped cross section covering almost the entire surface, and a midpoint connection wall portion 47 extending in a direction away from the yoke 42 b on the same end side as the distribution wall portion 46.

  The bobbin portion 45 is provided with flange portions 45a and 45b at both ends in the radial direction, and the stator coil 44 is wound around the bobbin portion 45 between the flange portions 45a and 45b. Further, the power distribution wall portion 46 includes a side plate portion 48 disposed along the end face of the yoke 42b, and two top plate portions 49 bent in a direction away from the divided iron core 42 from the tip of the side plate portion 48, A space between the top plate portions 49 and 49 is opened to form a rectangular engagement recess (engagement portion) 50. A space surrounded by the side plate portion 48, the top plate portions 49, 49, and the flange portion 45a is a power distribution space 51, and the power distribution member 70 is accommodated in the power distribution space 51. Further, the engaging recess 50 becomes an engaging portion for positioning the power distribution member 70 as will be described later.

  A hole 46a for exposing a part of the end surface of the yoke 42b is opened at the approximate center of the side plate 48 of the power distribution wall 46. Further, the side plate 48 is provided with a bracket 52 closer to the flange 45a than the hole 46a, and the tip of the arm 53 extending from the center tip of the flange 45a is located close to the bracket 52. . Further, the flange 45 a is provided with a notch groove 54 extending in the stacking direction of the divided cores 42 at a position adjacent to the arm 53.

  A terminal 61 is fixed between the bracket 52 and the arm 53. As shown in FIGS. 11 and 12, the terminal 61 is provided with a first connecting portion 61b having an arc shape on one end side with the support portion 61a in the center, and a second shape having a U shape on the other end side. The connection portion 61c is provided, and the second connection portion 61c includes a pair of elongated arms 61d and 61d that face each other. The terminal 61 is fixed by inserting a support portion 61 a between the bracket 52 and the arm 53, and the first connection portion 61 b is disposed on the same side as the notch groove 54. Then, one end 44a of the stator coil 44 is inserted into the first connection portion 61b through the notch groove 54, and the first connection portion 64 is caulked so that the one end 44a of the stator coil 44 is connected to the first connection portion 61b. They are connected (see FIG. 3, FIG. 10, FIG. 18 to FIG. 20). The power distribution member 70 is connected to the second connection portion 61c, which will be described later.

  Further, the midpoint connecting wall portion 47 is provided with a partition plate portion 55 disposed substantially parallel to the flange portion 45b, and closer to the flange portion 45b than the partition plate portion 55 and substantially parallel to the flange portion 45b. The flange portion 45b and the partition plate portion 55 are provided with notch grooves 57 and 58 extending in the stacking direction of the divided cores 42 at positions corresponding to each other.

A midpoint terminal 62 is fixed between the flange portion 45 b and the bracket 56. As shown in FIG. 11, the midpoint terminal 62 is configured by providing a U-shaped connection portion 62b at one end of the support portion 62a. The terminal 62 is fixed by inserting a support portion 62a between the flange portion 45b and the bracket 56, and the connection portion 62b is arranged substantially in a straight line with the cutout grooves 57 and 58. Then, the base end portion 44c of the other end 44b of the stator coil 44 is inserted into the connection portion 62b of the terminal 62 through the notch groove 57 of the flange portion 45b, and is arranged next to each other when assembled as the annular stator group 40. The leading end 44d of the other end 44b of the stator coil 44 in the stator piece 41 inserted is inserted into the same connecting portion 62b through the notch groove 58 of the partition plate portion 55, and the base end portion 41c and the leading end portion 44d are inserted. By caulking the connecting portion 62b, the other ends 44b, 44b of the two adjacent stator coils 44, 44 are coupled to the connecting portion 62b (see FIGS. 4, 10, and 17). Therefore, the other ends 44 b of the stator coils 44 of the stator pieces 41 of all phases are connected to each other via the midpoint terminal 62.
In this stator 1, after the other ends 44 b and 44 b of the two adjacent stator coils 44 and 44 are inserted into the connection portion 62 b of the midpoint terminal 62, the connection portion 62 b is caulked to perform caulking once. The two other ends 44b and 44b can be connected by work, and productivity is improved.

  As shown in FIG. 6, in the state where the annular stator group 40 is attached to the stator holder 20, the outer peripheral surface of the yoke 42 b of each stator piece 41 is fitted to the inner surface of the small-diameter cylindrical portion 26 of the stator holder 20. The end surface on one end side in the stacking direction of 42 is substantially flush with the outer surface of the flange portion 22, and the end surface on the other end side in the stacking direction of the split iron core 42 is substantially flush with the tip surface of the large-diameter cylindrical portion 27. Further, the outer peripheral portion of the power distribution wall portion 46 protrudes outward in the radial direction from the large diameter cylindrical portion 27.

Next, the power distribution member 70 accommodated in the power distribution space 51 of the insulating bobbin 43 will be described with reference to FIGS. 13 to 16 and FIG.
The distribution member 70 has U-phase, V-phase, and W-phase bus rings (feed lines) 71U, 71V, and 71W that are ring-shaped with the same diameter and are arranged concentrically while being shifted in the axial direction. 71U, 71V and 71W are configured by bundling them with a resin mold part (bundling member) 73. Each bus ring 71U, 71V, 71W is provided with connecting portions 72 protruding in a substantially U shape radially inward at predetermined intervals in the circumferential direction, and connecting portions 72 of each phase are connected to connecting portions 72 of other phases. And are arranged in order so as not to overlap in the circumferential direction.
As shown in FIG. 15, the bus rings 71U, 71V, 71W are all configured by covering the conductive wire 75 with the insulating cover 76, but the insulating cover 76 is peeled off at the connection portion 72 so that the conductive wire 75 is connected. Exposed. A portion extending in the diameter direction of the bus ring 71 (U to W) in the connection portion 72 is a terminal portion 72a.

  And as shown in FIG.13 and FIG.14, the resin mold part 73 is provided between the connection parts 72 and 72 adjacent in the circumferential direction irrespective of three phases. On the outer peripheral portion of the resin mold portion 73, a convex portion 73a that protrudes radially outward and has a narrow width in the circumferential direction is formed. As shown in FIG. 3, a portion of the resin mold portion 73 that is radially inward of the convex portion 73 a is formed to be accommodated along the inner surface of the top plate portion 49 of the insulating bobbin 43 of the stator piece 41. The convex portion 73a is formed in such a size that it can be inserted into the engagement concave portion 50 of the insulating bobbin 43 with almost no gap. Then, by inserting the convex portion 73a into the engaging concave portion 50, the distribution member 70 is positioned in the circumferential direction with respect to the annular stator group 40. In this state, the terminal portion of the connecting portion 72 in the bus rings 71U, 71V, 71W. 72 a is set so as to be inserted into the second connection portion 61 c of the terminal 61 in the corresponding stator piece 41.

  Here, the connecting portions 72 of the bus rings 71U, 71V, 71W are shifted in the axial direction for each phase, but the arm 61d of the second connecting portion 61c in the terminal 61 is connected to the connecting portion 72 located in any axial direction. The terminal portion 72a has an axial length that can be inserted, and the terminal portion 72a of any phase can be inserted between the arms 61d and 61d.

  Then, the terminal portion 72a and the second connection portion 61c are connected by caulking the second connection portion 61c into which the terminal portion 72a of the connection portion 72 is inserted, and the bus rings 71U and 71V of each phase are connected via the terminal 61. , 71 W and the stator coil 44 of the stator piece 41 corresponding to the phase are connected. 18 is a cross-sectional view (cross-sectional view taken along the line DD in FIG. 3) of the connection portion between the terminal portion 72a of the U-phase bus ring 71U and the second connection portion 61c of the terminal 61, and FIG. FIG. 20 is a cross-sectional view of the same connection portion in the W-phase bus ring 71W.

Therefore, the ends 44a of the stator coils 44 of the U-phase stator pieces 41 are connected to each other via the bus ring 71U, and the ends 44a of the stator coils 44 of the V-phase stator pieces 41 are connected to each other via the bus ring 71V. The ends 44a of the stator coils 44 of the W-phase stator pieces 41 are connected to each other via a bus ring 71W.
In addition, connection terminals 74U, 74V, and 74W extend radially outward from the bus rings 71U, 71V, and 71W of the respective phases, and the connection terminals 74U, 74V, and 74W of the respective phases are illustrated in FIGS. 2 and 5. As described above, the power supply terminals 91U, 91V, and 91W are connected to each other through the bus bars 90U, 90V, and 90W arranged in the terminal box 14.

Next, an assembly procedure of the stator 1 configured as described above will be described with reference to the drawings of FIGS.
First, as shown in FIG. 21, the stator holder 20 is attached to the housing 10. In that case, the stator holder 20 is inserted into the internal space 13 of the housing 10 with the flange portion 22 leading from the opening on the side where the boss 12 is not provided in the housing 10, that is, the opening on the internal combustion engine 2 side. Then, the flange 22 is brought into contact with the end face of the boss 12 while the through hole 23 of the flange 22 is aligned with the bolt hole 11 of the boss 12. Then, the two bolts 24 are respectively inserted into the knock pipes 25, inserted into the corresponding through holes 23 of the flange portion 22, screwed into the corresponding bolt holes 11 and tightened, and the knock pipe 25 is inserted into the knock holes 15. Insert. By attaching the two bolts 24 in this manner, the knock pipe 25 can be fitted in a fixed position, and the stator holder 20 can be accurately positioned with respect to the housing 10 in the circumferential direction and the radial direction. . Thereafter, the remaining four bolts 24 are screwed into the bolt holes 11 and tightened to complete the attachment of the stator holder 20.

  Next, as shown in FIG. 22, an annular stator group 40 in which the stator pieces 41 are previously arranged in an annular shape is attached to the stator holder 20. In that case, the annular stator group 40 is preceded by the opening of the introduction portion 31 of the stator holder 20 so that the side of the insulating bobbin 43 that does not have the power distribution wall portion 46 and the midpoint connection wall portion 47 is preceded. The stator group 40 is inserted. At this time, since the inner diameter of the large-diameter cylindrical portion 27 of the stator holder 20 is larger than the outer diameter of the yoke 42b of the split iron core 42 in the annular stator group 40, the yoke 42b can be smoothly inserted into the large-diameter cylindrical portion 27. it can. Then, after the yoke 42b is inserted into the large-diameter cylindrical portion 27, when the annular stator group 40 is further pushed in the axial direction, the yoke 42b is guided by the inner surface of the introducing portion 31 and does not bite the inner surface of the introducing portion 31. It is smoothly guided to the small diameter cylindrical portion 26. When the annular stator group 40 is further pushed in the axial direction, the yoke 42 b is press-fitted into the small diameter cylindrical portion 26. Therefore, the annular stator group 40 can be easily press-fitted into the stator holder 20.

When the annular stator group 40 is press-fitted into the stator holder 20, the tip of the press-fitting jig is passed through the hole 46 a opened in the power distribution wall portion 46 of the insulating bobbin 43 and directly into the end surface of the split iron core 42. Apply pushing force. As a result, the annular stator group 40 can be press-fitted into the stator holder 20 without applying force to the resin-made insulating bobbin 43. As a result, the insulating bobbin 43 is not damaged, and the insulating bobbin 43 is damaged. Can be prevented.
Moreover, the press-fitting dimension of the annular stator group 40 to the stator holder 20 can be set by the axial stroke of the press-fitting jig. In this way, the press-fit dimensions can be easily managed.

  Next, as shown in FIG. 23, the distribution member 70 is connected to the distribution space 51 of the insulating bobbin 43 from the side of the annular stator group 40 having the distribution wall 46 and the midpoint connection wall 47 of the insulating bobbin 43. And housed in the power distribution space 51. At this time, the connection portions 74U, 74V, and 74W of the power distribution member 70 are arranged at the connection positions with the bus bars 90U, 90V, and 90W, and the convex portions 73a of the resin mold portion 73 of the power distribution member 70 are connected to the stators. Positioning in the circumferential direction is performed by engaging with the engaging recess 50 of the insulating bobbin 43 in the piece. Thereby, the power distribution member 70 can be easily attached to the annular stator group 40 at an accurate position, and the terminal portion 72a of the connection portion 72 in the bus rings 71U, 71V, 71W is connected to the stator piece 1 of the corresponding phase. The terminal 61 can be easily inserted between the arms 61d and 61d of the second connecting portion 61c. Thereafter, the second connecting portions 61c into which the terminal portions 72a are inserted are caulked so that the terminal portions 72a are sandwiched between the arms 61d and 61d, and the terminal portions 72a are securely connected to the terminals 61. Further, the connection terminals 74U, 74V, and 74W of the respective phases are connected to the bus bars 90U, 90V, and 90W by bolts 92, respectively.

When assembled in the above procedure, the housing 10 is fixed, and the stator holder 20, the annular stator group 40, and the power distribution member 70 can be assembled in this order from the internal combustion engine 2 side. . Therefore, it is not necessary to reverse the direction of the member during assembly, and productivity is improved.
Further, since the terminal 61 having the same shape and dimensions may be attached to the stator piece 41 of any phase, only one type of terminal 61 is required, so that parts can be shared and productivity is improved.

[Other Examples]
The present invention is not limited to the embodiment described above.
For example, the power distribution member is not limited to a configuration in which the bus ring (feeding line) as in the above-described embodiment is partially bundled with the resin mold portion in the circumferential direction, and the entire bus ring is surrounded by the resin mold. It is possible to employ power distribution members having various structures such as those described above. The terminal portion of the power supply line is not limited to the U-shape described above, and may be a straight bar shape.

Further, the shape of the second connection portion of the terminal is not limited to that of the above-described embodiment, and various shapes can be adopted as long as it has a function capable of being connected to the terminal portion of any phase.
The above-described embodiments are examples in which the present invention is applied to a stator of a drive motor for a hybrid vehicle. However, the present invention can also be applied to a drive motor for an electric vehicle, other motors, and a stator for a generator. It is.

It is a schematic diagram of the drive system of the hybrid vehicle which uses the electric motor provided with the stator concerning this invention as one of the drive sources. It is a front view of the stator in Example 1. FIG. FIG. 3 is an enlarged front view of a main part of the stator in Example 1. FIG. 3 is an enlarged front view of a main part of the stator in Example 1. It is a longitudinal cross-sectional view of the stator in Example 1. FIG. 3 is an enlarged cross-sectional view of a main part of the stator in Example 1. It is the front view seen from the flange side of the stator holder used for the stator of Example 1. It is AA sectional drawing of FIG. It is the B section expanded sectional view of FIG. It is an assembly perspective view of the stator piece used for the stator of Example 1. It is a disassembled perspective view of the stator piece. It is a perspective view of the terminal of the stator piece. It is a front view of the power distribution member used for the stator of Example 1. It is a side view of the power distribution member. It is CC sectional drawing of FIG. It is a disassembled perspective view of the said power distribution member. It is EE sectional drawing of FIG. It is sectional drawing in the connection part of the U-phase bus ring and terminal of the said power distribution member, and is DD sectional drawing of FIG. It is sectional drawing in the connection part of the V-phase bus ring and terminal of the said power distribution member. It is sectional drawing in the connection part of the W-phase bus ring of the said power distribution member, and a terminal. FIG. 6 is an exploded perspective view (No. 1) for explaining an assembling procedure of the stator according to the first embodiment. FIG. 6 is an exploded perspective view (No. 2) for explaining the assembly procedure of the stator of the first embodiment. FIG. 6 is an exploded perspective view (No. 3) for explaining the assembly procedure of the stator of the first embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stator 40 Annular stator group 41 Stator piece 42 Split iron core 43 Insulating bobbin 44 Stator coil 44a One end 44b The other end 61 Terminal 61b First connection part 61c Second connection part 61d Arm 62 Midpoint terminal 62b Connection part 70 Power distribution member 72a Terminal part 71U-71W bus ring (feed line)
73 Resin mold part (binding member)

Claims (4)

A stator piece is formed by winding a stator coil around an insulating bobbin that is externally fitted to a split iron core, and a plurality of stator pieces are arranged in an annular shape to form an annular stator group. An annular power distribution member is provided in the annular stator group. A stator attached to each phase of the power distribution member and the stator coil connected via a terminal fixed to the insulating bobbin;
The feed lines are arranged to be shifted in the axial direction of the stator for each phase, and each feed line includes a terminal portion extending in the diameter direction of the stator,
The terminal includes a first connection portion connected to one end of the stator coil, and a second connection portion having a length in the axial direction that can be connected to the terminal portion of a power supply line of any phase. And stator.   The said 2nd connection part has a pair of arm opposingly arranged along the axial direction of a stator, The said terminal part is pinched | interposed and connected by this pair of arm, The connection of Claim 1 characterized by the above-mentioned. Stator.   3. The stator according to claim 1, wherein the power distribution member is configured by bundling a plurality of power supply lines having the same diameter in an annular shape by a bundling member at a predetermined interval in the circumferential direction.   A midpoint terminal that connects the other ends of the stator coils is fixed to the insulating bobbin, and the midpoint terminal includes a connecting portion that sandwiches and connects the other ends of two adjacent stator coils. The stator according to any one of claims 1 to 3, wherein the stator is any one of claims 1 to 3.

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