JP5957366B2 - Rotating electric machine stator - Google Patents

Description

  The present invention relates to a stator for a rotating electrical machine.

  As a stator of a rotating electric machine, a cylindrical stator holder is bolted to a housing, and an annular stator group in which a plurality of stator pieces around which coils are wound is arranged in an annular shape is press-fitted and held inside the stator holder, 2. Description of the Related Art A wiring member for supplying power to a coil of each stator piece is provided along an annular stator group. Moreover, the stator holder of this kind of electric motor is provided with a flange fixed to the housing on one end side in the axial direction.

  In Patent Document 1, when an annular stator group is press-fitted inside a stator holder, a stator holder provided with an introduction portion on the other end side in the axial direction, that is, on the opposite side to the flange, so that the press-fitting can be smoothly performed. Is disclosed. Specifically, referring to FIGS. 12 and 13, the stator holder 103 includes a cylindrical portion 104, and includes a flange 112 that protrudes from one axial end portion of the cylindrical portion 104 to the outer diameter side. The cylindrical portion 104 includes a small-diameter cylindrical portion 131, a tapered cylindrical portion 132, a large-diameter cylindrical portion 133, and arcuate surfaces 134a and 134b that smoothly connect the respective cylindrical portions.

  The introduction part 107 includes a large-diameter cylindrical part 133 of the cylindrical part 104, a tapered cylindrical part 132, and arcuate surfaces 134a and 134b. That is, the tapered cylindrical portion 132 is formed such that the inner diameter of the cylindrical portion 104 of the stator holder 103 continuously contracts from the other axial end side toward the one axial end side. As a result, when the annular stator group is press-fitted into the stator holder 103, the conventional stator can press-fit the annular stator group not only from the flange 112 side but also from the introduction portion 107 on the opposite side. .

  However, since the stator holder 103 has a small rigidity in the vicinity of the introduction portion 107, an annular expansion / contraction vibration mode caused by magnetic attraction / repulsion between the rotor and the stator during operation of the rotating electrical machine is suppressed. There is a risk that noise may be generated due to vibration.

  Therefore, in the invention of Patent Document 2, as shown in FIGS. 14 and 15, a flange 212 is provided at one axial end of the cylindrical portion 204 of the stator holder 203, and protrudes to the outer diameter side at the other axial end edge. By providing the second flange 231, the radial deformation of the stator holder 203 is suppressed, and vibration noise is reduced. The flange 212 is provided with a plurality of bolt mounting holes 213, and the bolts inserted into the bolt mounting holes 213 are screwed into the bolt holes of the housing, so that the stator holder 203 is fixed to the housing. The

  As shown in FIG. 16, the rotating electrical machine 301 of Patent Document 3 includes a rotor 310 that is rotatably supported by the rotor shaft 316, and a stator 312 that is installed on the outer diameter side of the rotor 310. It is accommodated in a motor case (not shown).

  The stator 312 includes an outer cylinder ring 332, and the outer cylinder ring 332 is attached to the outer periphery of the split core 328 constituting the stator core 326. More specifically, the outer peripheral portion of the split core 328 constituting the stator core 326 is fitted on the inner peripheral side of the outer cylinder ring 332.

  The outer cylinder ring 332 includes a first divided outer cylinder ring 332a and a second divided outer cylinder ring 332b that are divided into two in the axial direction. And the flange 334 extended in the outer diameter side and mutually opposing is provided in the axial direction inner side edge part of the 1st division | segmentation outer cylinder ring 332a and the 2nd division | segmentation outer cylinder ring 332b. Although not shown, the flange 334 is provided with a plurality of bolt holes. The bolts are passed through the bolt holes, and the bolts are engaged with the motor case, whereby the outer cylinder ring 332 is attached to the motor case. . In this way, by arranging the flanges 334 of the first divided outer cylinder ring 332a and the second divided outer cylinder ring 332b to face each other, the thickness of the flange 334 is made thicker than the thickness of the cylindrical portion of the outer cylinder ring 332. The mounting strength to the motor case is improved.

JP 2005-312151 A International Publication No. 2012/073959 JP 2011-155738 A

  However, in the invention described in Patent Document 2, since the second flange 231 is not fixed to the housing, there is a possibility that vibration and noise due to the vibration may occur during operation of the rotating electrical machine.

  Further, in the invention described in Patent Document 3, since the rigidity of the axially outer ends of the first divided outer cylinder ring 332a and the second divided outer cylinder ring 332b, that is, the portion where the flange 334 is not provided is low, vibration is caused. And noise may occur.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a stator for a rotating electrical machine capable of reducing the vibration of the stator and the generation of noise caused by the vibration.

In order to achieve the above object, the invention described in claim 1
A split core configured by stacking a plurality of steel plates (for example, a split core 17 in an embodiment described later);
A stator core configured by connecting the divided cores in a circumferential direction (for example, a stator core 19 in an embodiment described later);
A holder (for example, a holder 40 in an embodiment described later) fitted into an outer peripheral surface of the stator core (for example, an outer peripheral surface 19a in an embodiment described later);
A housing (for example, a stator housing 2 in an embodiment described later) disposed on the outer diameter side of the holder and supporting the holder;
A stator of a rotating electrical machine (e.g., a stator 1 in an embodiment described later),
The holder is
A cylindrical portion (for example, a cylindrical portion 50 in an embodiment described later) that abuts the stator core in the radial direction;
A first flange (for example, a first flange 60 in an embodiment described later) protruding from the one end in the axial direction of the cylindrical portion to the outer diameter side;
A second flange (for example, a second flange 70 in an embodiment described later) protruding from the other end side in the axial direction to the outer diameter side of the first flange of the cylindrical portion;
Have
The first flange and the second flange are a first fastening portion and a second fastening portion that are fastened and fixed to different parts of the housing (for example, a first housing flange 9 and a second housing flange 10 in the embodiment described later). (For example, it has the 1st convex part 64 in the below-mentioned embodiment, the 2nd convex part 74), It is characterized by the above-mentioned.

In addition to the structure of Claim 1, the invention of Claim 2 is
The first flange and the second flange are respectively formed at one axial end and the other axial end of the cylindrical portion,
The first fastening part and the second fastening part are arranged so that their circumferential phases are different from each other.

In addition to the structure of Claim 1, the invention of Claim 3 is
The holder is divided into a first divided holder (for example, a first divided holder 40A in an embodiment described later) and a second divided holder (for example, a first divided holder in an embodiment described later). 2 split holder 40B)
The cylindrical portion includes a first cylindrical portion of the first divided holder (for example, a first cylindrical portion 50A in an embodiment described later) and a second cylindrical portion of the second divided holder (for example, described later). The second cylindrical portion 50B) in the embodiment,
The first flange is provided on the first tubular portion,
The second flange is provided on the second cylindrical portion.

In addition to the structure of Claim 3, the invention of Claim 4 is
The first flange protrudes from the one end portion in the axial direction of the first tubular portion to the outer diameter side,
The second flange protrudes from the other axial end of the second cylindrical portion to the outer diameter side.

In addition to the structure of Claim 4, the invention of Claim 5 is
In the first fastening portion and the second fastening portion, the fastening portions of the housing to which the first flange and the second flange are fastened and fixed are respectively the shafts of the first tubular portion, the second tubular portion, and the shaft. It is characterized by overlapping in the direction.

In addition to the structure of Claim 3, the invention of Claim 6 is
The first flange protrudes from the one end portion in the axial direction of the first tubular portion to the outer diameter side,
The second flange protrudes from the one axial end portion of the second cylindrical portion to the outer diameter side.

In addition to the structure of any one of Claims 3-6, the invention of Claim 7 is
One of the first cylindrical part and the second cylindrical part is fixed to the outer peripheral surface of the other cylindrical part.

In addition to the structure of any one of Claims 3-7, the invention of Claim 8 is
The first fastening part and the second fastening part are arranged so that their circumferential phases are different from each other.

According to the first aspect of the present invention, the holder includes a cylindrical portion that comes into contact with the stator core in the radial direction, a first flange that protrudes from the axial end of the cylindrical portion toward the outer diameter side, and the cylindrical portion. A second flange projecting to the outer diameter side from the other axial end side of the first flange, and the first flange and the second flange are fastened and fixed to different parts of the housing And a second fastening portion.
Therefore, the first flange protruding from the one axial end of the cylindrical portion to the outer diameter side and the second flange protruding from the other axial end to the outer diameter side of the first flange of the cylindrical portion are massed. Can be directly fastened to a large casing and fixed together.
In addition, the rigidity of the stator is improved over the entire axial direction against the vibration mode of expansion and contraction in the radial direction of the stator caused by magnetic attraction and repulsion between the rotor and the stator during operation of the rotating electrical machine. Can do.
Accordingly, it is possible to reduce the vibration of the stator and the generation of noise due to the vibration while suppressing an increase in cost.

According to the second aspect of the present invention, since the first flange and the second flange are respectively disposed at both axial ends of the cylindrical portion, the rigidity of the holder can be improved more effectively, and vibration In addition, the generation of noise due to vibration can be reduced.
In addition, since the first fastening portion and the second fastening portion are arranged so that the circumferential phases are different from each other, even if the cylindrical portion and the first and second flanges are integrally formed, It can be fastened to the housing. In particular, since the first flange and the second flange can be fastened from the same axial direction, the assembling property of the holder to the housing is improved, and the production efficiency can be improved.
Furthermore, for each vibration mode of the zeroth order vibration mode (annular expansion / contraction), the first order vibration mode (elliptical expansion / contraction), the second order (triangular expansion / contraction), ... The number of modes that can effectively reduce vibration can be increased.

  According to invention of Claim 3, a 1st flange is provided in the 1st cylindrical part of a 1st division | segmentation holder, and a 2nd flange is provided in the 2nd cylinder part of a 2nd division | segmentation holder. Therefore, compared with the case where two flanges are provided in one cylindrical portion, processing is easy and dimensional accuracy can be improved.

  According to invention of Claim 4, a 1st flange protrudes from the axial direction one end part of a 1st cylindrical part to an outer diameter side, and a 2nd flange is an outer diameter from the axial direction other end part of a 2nd cylindrical part. Protrudes to the side. Therefore, the rigidity of the holder can be improved more effectively, and the generation of vibration and noise resulting from the vibration can be reduced.

  According to invention of Claim 5, in the 1st fastening part and the 2nd fastening part, the fastening location of the housing | casing to which the 1st flange and the 2nd flange are fastened and fixed respectively is a 1st cylindrical part and a 1st, respectively. Two cylinders overlap in the axial direction. Therefore, it is possible to suppress an increase in the size of the housing in the axial direction and reduce the influence on the layout of the peripheral members.

  According to the sixth aspect of the present invention, the first flange protrudes from the one axial end of the first cylindrical portion toward the outer diameter side, and the second flange is also externally removed from the one axial end of the second cylindrical portion. Projects to the radial side. Therefore, the fastening part of the housing | casing fastened with the 1st fastening part of a 1st flange and the 2nd fastening part of a 2nd flange overlaps with a 1st cylindrical part and a 2nd cylindrical part, respectively in an axial direction. Therefore, it is possible to suppress the casing from increasing in size in the axial direction and to reduce the influence on the layout of the peripheral members.

According to invention of Claim 7, one cylindrical part is being fixed to the outer peripheral surface of the other cylindrical part among the 1st cylindrical part and the 2nd cylindrical part. Therefore, since the first flange and the second flange are fastened to the casing in a state where the first split holder and the second split holder are fixed to each other, the rigidity of the holder can be improved, and vibration and vibration can be improved. It is possible to reduce the occurrence of noise caused by the noise.

According to invention of Claim 8, a 1st fastening part and a 2nd fastening part are arrange | positioned so that the phase of the circumferential direction may mutually differ. Therefore, since it becomes possible to fasten the 1st flange and the 2nd flange from the same axial direction, the attachment nature of the holder to a housing improves and it can improve production efficiency.
Further, even when the first flange and the second flange are fastened from different axial directions, it is possible to prevent the order of assembly in the three parts of the stator core, the holder, and the housing from being limited, and the assembly method can be freely set. The degree can be improved. That is, after attaching the first divided holder and the second divided holder to the housing, it is possible to fix the stator core to the inner peripheral surfaces of the first divided holder and the second divided holder. It is also possible to attach the first divided holder and the second divided holder to the housing after fitting the first divided holder and the second divided holder.
Furthermore, for each vibration mode of the zeroth order vibration mode (annular expansion / contraction), the first order vibration mode (elliptical expansion / contraction), the second order (triangular expansion / contraction), ... The number of modes that can effectively reduce vibration can be increased.

It is a schematic diagram of the drive system of the hybrid vehicle which uses the electric motor provided with the stator which concerns on this invention as one of the drive sources. It is a perspective view of the stator of 1st Embodiment of this invention. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. It is a perspective view of the holder concerning a 1st embodiment. It is sectional drawing which showed typically a mode that the holder of FIG. 5 was fixed to a stator housing. It is a perspective view of the holder which concerns on 2nd Embodiment. It is sectional drawing which showed typically a mode that the holder of FIG. 7 was fixed to a stator housing. It is sectional drawing which showed typically a mode that the holder which concerns on 3rd Embodiment was fixed to a stator housing. It is sectional drawing which showed typically a mode that the holder which concerns on 4th Embodiment was fixed to a stator housing. It is sectional drawing which showed typically a mode that the holder which concerns on 5th Embodiment is fixed to a stator housing. 10 is a cross-sectional view of a stator holder according to Patent Document 1. FIG. It is a principal part expanded sectional view of the stator holder of FIG. 10 is a perspective view of a stator holder according to Patent Document 2. FIG. It is a principal part expanded sectional view of the stator holder of FIG. 10 is a schematic diagram showing a rotating electrical machine according to Patent Document 3. FIG.

(First embodiment)
Hereinafter, a stator of a rotating electrical machine according to a first embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the stator of the present embodiment is used for a drive motor of a hybrid vehicle. The hybrid vehicle includes an engine E and an electric motor M (rotary electric machine) as drive sources, and an output shaft ES of the engine E and an input shaft TS of the transmission T are coupled to a rotor R that rotates inside the stator 1 in the electric motor M. . The driving force of the engine E and the electric motor M is transmitted to driving wheels W (wheels) via the transmission T, and the hybrid vehicle travels using at least one power of the engine E and the electric motor M as a driving force. Also, in this hybrid vehicle, when electric power is transmitted from the drive wheel W side to the electric motor M side during deceleration, the electric motor M functions as a generator, and the kinetic energy of the vehicle body is converted into electric energy by regenerative braking to a power storage device (not shown) to recover.

  As shown in FIG. 2, the stator 1 includes a stator housing 2 as a casing made of an aluminum alloy, an iron holder 40 fixed in the internal space of the stator housing 2, and a cylindrical portion 50 described later of the holder 40. An annular stator group 5 supported on an inner peripheral surface 52 (see FIGS. 3 to 5) and an annular power distribution member 6 (bus ring) are provided.

  The stator housing 2 forms a housing of the electric motor M, and is fixed between an engine E and a transmission T to an engine block (not shown) or a transmission case. A terminal box 11 connected to the internal space is provided on the upper portion of the stator housing 2.

  As shown in FIGS. 3 to 5, the holder 40 includes a cylindrical portion 50 extending in the axial direction and an axial end of the cylindrical portion 50 (the left end portion in FIGS. 3 and 4) from the outer diameter side. From the other end side in the axial direction of the first flange 60 projecting to the first flange 60 and the first flange 60 of the cylindrical portion 50 (right side in FIGS. 3 and 4), more specifically, the axial direction of the cylindrical portion 50 A second flange 70 protruding from the other end to the outer diameter side.

  The cylindrical portion 50 is formed in a substantially annular shape that can fix the annular stator group 5 to the inner peripheral surface 52 by press-fitting. The axial width of the cylindrical portion 50 is set to be approximately equal to the axial width of a stator core 19 (divided core 17) described later.

  The first flange 60 has a substantially annular first base 62 and a plurality of (three in the present embodiment) first convex portions that protrude from the predetermined position in the circumferential direction of the first base 62 toward the outer diameter side. 64. The first protrusion 64 is provided with a bolt mounting hole 66, and the bolt 68 inserted through the bolt mounting hole 66 is connected to the bolt hole 15 provided in the first housing flange 9 of the stator housing 2. The first flange 60 is fixed to the stator housing 2 by screwing from the other end in the direction toward the one end in the axial direction. Note that the amount of protrusion of each first protrusion 64 in the radial direction is not constant, and is appropriately changed according to the position where the bolt mounting hole 66 is formed. Thus, the 1st convex part 64 comprises the 1st fastening part fastened and fixed to the stator housing 2. As shown in FIG.

  The second flange 70 has a substantially annular second base 72 and a plurality (three in this embodiment) of second protrusions protruding from a predetermined position in the circumferential direction of the second base 72 toward the outer diameter side. And a convex portion 74. The 2nd convex part 74 is arrange | positioned so that the phase of the circumferential direction may mutually differ with respect to the 1st convex part 64, and in this embodiment, the some 1st convex part 64 and the 2nd convex part 74 are the holder 40. The first convex portion 64, the second convex portion 74, the first convex portion 64, the second convex portion 74, the second convex portion 74, and the first convex portion 64 are arranged in this order in the circumferential clockwise direction. The second protrusion 74 is provided with a bolt mounting hole 76, and a bolt 78 inserted through the bolt mounting hole 76 is formed in the bolt hole 14 provided in the second housing flange 10 of the stator housing 2. The second flange 70 is fixed to the stator housing 2 by screwing from the other axial end toward the one axial end. In addition, the amount of protrusion in the radial direction of each second convex portion 74 is not constant, and is appropriately changed according to the position where the bolt mounting hole 76 is formed. Thus, the second convex portion 74 constitutes a second fastening portion that is fastened and fixed to the stator housing 2.

  The first flange 60 and the second flange 70 are formed by bending using a press or the like, and the radial width and axial width of the first base 62, the first convex portion 64, the second base 72, and the second convex portion 74, and the like. Is appropriately set according to the weight specification of the stator 1, the installation space of the holder 40, etc., based on the strength required for the stator 1.

  FIG. 6 schematically shows that the holder 40 is fixed to the stator housing 2 by fixing the first flange 60 and the second flange 70 to the first housing flange 9 and the second housing flange 10, respectively. Is shown in FIG. 6 is not a cross-sectional view of the same phase in the circumferential direction, but is a position where the first and second convex portions 64 and 74 are provided on the first and second flanges 60 and 70, that is, different phases (phases) in the circumferential direction. It is sectional drawing in a difference.

  The annular stator group 5 is configured by connecting a plurality of stator pieces 16 (18 in the present embodiment) in the circumferential direction. Each stator piece 16 includes a split core 17 formed by laminating a plurality of steel plates in the axial direction, an insulator 18 mounted on the split core 17 and electrically insulated, and a split core 17 via the insulator 18. And a coil 20 to be wound.

  Therefore, the annular stator group 5 is configured by connecting the plurality of stator pieces 16 in the circumferential direction, and the annular stator core 19 is configured by connecting the plurality of divided cores 17 in the circumferential direction. The stator core 19 (annular stator group 5) and the holder 40 are brought into contact with each other and fixed by fitting the inner peripheral surface 52 of the cylindrical portion 50 of the holder 40 into the outer peripheral surface 19a of the stator core 19.

  As shown in FIGS. 3 and 4, the power distribution member 6 is concentrically shifted in the axial direction from U-phase, V-phase, and W-phase bus rings (feed lines) 21U, 21V, and 21W that form a ring with the same diameter. The three-phase bus rings 21U, 21V, 21W are bundled by a resin mold portion 25 at predetermined intervals in the circumferential direction. In addition, connection terminals 23 (see FIG. 2) extend radially outward from the bus rings 21U, 21V, and 21W of the respective phases.

  As shown in FIG. 2, the bus rings 21 </ b> U, 21 </ b> V, 21 </ b> W for each phase are connected to one end of the coil 20 of the corresponding stator piece 16, and the connection terminal 23 for each phase is a power supply in the terminal box 11. It is connected to terminals 28U, 28V, 28W. Furthermore, the other ends of the coils 20 of the adjacent stator pieces 16 are also connected by a predetermined method such as using a neutral point bus bar.

  Therefore, one end of the coil 20 of each U-phase stator piece 16 is connected via the bus ring 21U, one end of the coil 20 of each V-phase stator piece 16 is connected via the bus ring 21V, and the W phase. One end of the coil 20 of each stator piece 16 is connected via a bus ring 21W.

  The procedure for assembling the stator 1 configured as described above will be described below.

<Assembly method 1>
First, the holder 40 is attached to the stator housing 2. More specifically, the bolts 68 and 78 inserted through the bolt holes 15 and 14 of the first housing flange 9 and the second housing flange 10 of the stator housing 2 are connected to the first flange 60 and the second flange 70 of the holder 40. Screwed into the bolt mounting holes 66 and 76 of the first convex portion 64 and the second convex portion 74 from the other axial end side to the one axial end side (toward the left side in FIGS. 3, 4, and 6). Thus, the first flange 60 and the second flange 70 are fixed to the first housing flange 9 and the second housing flange 10, respectively, and the holder 40 is fixed to the stator housing 2.

  Next, the stator 1 is assembled by press-fitting the annular stator group 5 formed by arranging the stator pieces 16 in an annular shape in advance from the other axial end side of the holder 40 toward the one axial end side. Complete.

<Assembly method 2>
In addition, the assembly method of the stator 1 is not limited to the above-described assembly method 1, and can also be performed according to the procedure described below.

  First, the annular stator group 5 formed by previously arranging the stator pieces 16 in an annular shape is press-fitted into the holder 40 toward one end in the axial direction or the other end in the axial direction. Then, the assembly of the stator 1 is completed by fixing the holder 40 to the stator housing 2 by the same method as the assembly method 1.

As described above, according to the stator 1 of the rotating electrical machine of the present embodiment, the holder 40 has the outer diameter from the cylindrical portion 50 that comes into contact with the stator core 19 in the radial direction and one axial end portion of the cylindrical portion 50. A first flange 60 protruding to the side, and a second flange 70 protruding to the outer diameter side from the other axial end side than the first flange 60 of the cylindrical portion 50, and the first flange 60 and the first flange 60 The two flanges 70 include first convex portions 64 and second convex portions 74 that are fastened and fixed to different portions of the stator housing 2, that is, the first housing flange 9 and the second housing flange 10, respectively.
Therefore, the 1st flange 60 which protrudes to the outer diameter side from the axial direction one end part of the cylindrical part 50, and the 2nd flange which protrudes from the axial direction other end side to the outer diameter side rather than the 1st flange 60 of the cylindrical part 50 70 can be directly fastened to the stator housing 2 having a large mass and fixed together.
The rigidity of the stator 1 over the entire axial direction against the vibration mode of expansion and contraction in the radial direction of the stator 1 caused by the magnetic attraction / repulsion force between the rotor and the stator 1 during operation of the rotating electrical machine. Can be improved.
Therefore, it is possible to reduce the vibration of the stator 1 and the generation of noise due to the vibration while suppressing an increase in cost.

Moreover, since the 1st flange 60 and the 2nd flange 70 are each arrange | positioned at the axial direction both ends of the cylindrical part 50, the rigidity of the holder 40 can be improved more effectively and it originates in a vibration and vibration. Generation of noise can be reduced.
Moreover, since the 1st convex part 64 and the 2nd convex part 74 are arrange | positioned so that the phase of the circumferential direction may mutually differ, the cylindrical part 50, the 1st flange 60, and the 2nd flange 70 were formed integrally. Even the holder 40 can be fastened to the stator housing 2. In particular, since the first flange 60 and the second flange 70 can be fastened from the same axial direction, the assembling property of the holder 40 to the stator housing 2 is improved, and the production efficiency can be improved.
Furthermore, for each vibration mode of the zeroth order vibration mode (annular expansion / contraction), the first order vibration mode (elliptical expansion / contraction), the second order (triangular expansion / contraction), ... The number of modes that can effectively reduce vibration can be increased.

(Second Embodiment)
Next, a stator for a rotating electrical machine according to a second embodiment of the present invention will be described.

  As shown in FIGS. 7 and 8, the stator 1 of the rotating electrical machine according to the present embodiment has a first divided holder 40 </ b> A and a second divided at the axially intermediate portion at one axial end and the other axial end. The holder 40 which consists of the division | segmentation holder 40B is provided.

  Therefore, the cylindrical part 50 of the holder 40 is also divided into one axial end side and the other axial end side, and the first cylindrical part 50A of the first split holder 40A and the second cylindrical part of the second split holder 40B. 50B.

  The first flange 60 is provided on the first cylindrical portion 50A, and the second flange 70 is provided on the second cylindrical portion 50B. More specifically, the first flange 60 protrudes from the one end portion in the axial direction of the first tubular portion 50A to the outer diameter side, and the second flange 70 extends from the other end portion in the axial direction of the second tubular portion 50B to the outer diameter. Protrudes to the side. In addition, since the structure of each part provided in the 1st flange 60 and the 2nd flange 70 is the same as that of 1st Embodiment, the description is abbreviate | omitted by attaching | subjecting the code | symbol of each part.

  The procedure for assembling the stator 1 configured as described above will be described below.

<Assembly method 3>
First, the first divided holder 40 </ b> A and the second divided holder 40 </ b> B are attached to the stator housing 2. More specifically, the bolts 68 and 78 inserted through the bolt holes 15 and 14 of the first housing flange 9 and the second housing flange 10 of the stator housing 2 are connected to the first flange 60 and the second flange 70 of the holder 40. By first screwing into the bolt mounting holes 66 and 76 of the first convex portion 64 and the second convex portion 74 from the other axial end side toward the one axial end side (to the left side in FIG. 8), the first And the second flanges 60 and 70 are fixed to the first housing flange 9 and the second housing flange 10, respectively, and the first split holder 40A and the second split holder 40B are fixed to the stator housing 2.

  Next, the annular stator group 5 formed by arranging the stator pieces 16 in an annular shape in advance is press-fitted from the other axial end side of the first divided holder 40A and the second divided holder 40B toward one axial end side. Thus, the assembly of the stator 1 is completed.

  Here, the other axial end of the first cylindrical portion 50A of the first split holder 40A of the present embodiment and the one axial end of the second cylindrical portion 50B of the second split holder 40B are opposed to each other. However, it may be configured to be separated in the axial direction.

<Assembly method 4>
Note that the method for assembling the stator 1 is not limited to the above-described assembling method 3, and can be performed according to the procedure described below.

  First, the annular stator group 5 formed by arranging the stator pieces 16 in an annular shape in advance is directed toward one axial end or the other axial end with respect to the first split holder 40A and the second split holder 40B. Press fit. Then, the assembly of the stator 1 is completed by fixing the first divided holder 40A and the second divided holder 40B to the stator housing 2 by a method similar to the assembly method 3.

  As described above, according to the stator 1 of the rotating electrical machine of the present embodiment, the first flange 60 is provided in the first tubular portion 50A of the first split holder 40A, and the second flange 70 is the second split holder 40B. It is provided in the second cylindrical portion 50B. Therefore, as compared with the case where two flanges are provided in one cylindrical portion as in the first embodiment, processing is easy and dimensional accuracy can be improved.

  The first flange 60 protrudes from the one axial end of the first cylindrical portion 50A to the outer diameter side, and the second flange 70 protrudes from the other axial end of the second cylindrical portion 50B to the outer diameter side. Therefore, the rigidity of the holder 40 can be improved more effectively, and the generation of vibration and noise resulting from the vibration can be reduced.

Moreover, the 1st convex part 64 and the 2nd convex part 74 are arrange | positioned so that the phase of the circumferential direction may mutually differ. Therefore, since it becomes possible to fasten the 1st flange 60 and the 2nd flange 70 from the same axial direction, the assembly | attachment property of the holder with respect to the stator housing 2 improves, and it can improve production efficiency.
Furthermore, for each vibration mode of the zeroth order vibration mode (annular expansion / contraction), the first order vibration mode (elliptical expansion / contraction), the second order (triangular expansion / contraction), ... The number of modes that can effectively reduce vibration can be increased.

(Third embodiment)
Next, a description will be given of a stator of a rotating electrical machine according to a third embodiment of the present invention.

  When the first split holder 40A and the second split holder 40B are attached to the stator housing 2, the stator 1 of the rotating electrical machine according to the present embodiment is different in that the fastening directions of the first flange 60 and the second flange 70 are different. Different from the embodiment.

  More specifically, in the present embodiment, as shown in FIG. 9, the first housing flange 9 and the second housing flange 10 overlap the first cylindrical portion 50A and the second cylindrical portion 50B in the axial direction, respectively. To be formed.

  Then, the bolt 68 inserted through the bolt hole 15 of the first housing flange 9 of the stator housing 2 extends from one axial end to the other axial end of the bolt mounting hole 66 of the first convex portion 64 of the first flange 60. The first flange 60 is fixed to the first housing flange 9 by screwing toward (to the right in FIG. 9).

  On the other hand, the bolt 68 inserted through the bolt hole 14 of the second housing flange 10 of the stator housing 2 is inserted into the bolt mounting hole 76 of the second convex portion 74 of the second flange 70 from the other axial end to the axial end. The second flange 70 is fixed to the second housing flange 10 by screwing toward the side (toward the left side in FIG. 9).

  Thus, the fastening location of the stator housing 2 to be fastened with the first convex portion 64 of the first flange 60 and the second convex portion 74 of the second flange 70, that is, the first housing flange 9 and the second housing flange 10, Since it can arrange | position so that it may overlap with the 1st cylindrical part 50A and the 2nd cylindrical part 50B in an axial direction, respectively, it suppresses that the stator housing 2 enlarges to an axial direction, and with respect to the layout of a peripheral member It is possible to reduce the influence.

  In the present embodiment, the first convex portion 64 and the second convex portion 74 are not limited to the configuration in which the circumferential phases are different from each other, and the circumferential phases may be equal to each other. Absent. In this case, the stator 1 is assembled after the first divided holder 40A and the second divided holder 40B are fixed to the stator housing 2 and then the annular stator group 5 is replaced by the first divided holder 40A and the second This is performed by press-fitting the split holder 40B in the axial direction.

(Fourth embodiment)
Next, a stator for a rotary electric machine according to a fourth embodiment of the present invention will be described.

  The stator 1 of the present embodiment has the same basic configuration as that of the third embodiment, but is different in that the first cylindrical portion 50A is press-fitted into the outer peripheral surface of the second cylindrical portion 50B.

  More specifically, in this embodiment, as shown in FIG. 10, the axial length of the second cylindrical portion 50B is set to be substantially equal to the axial length of the stator core 19, and the second cylindrical portion The inner peripheral surface of 50B and the outer peripheral surface 19a of the stator core abut on each other in the radial direction.

  Further, the axial length of the first cylindrical portion 50A is set shorter than the axial length of the second cylindrical portion 50B, and the first cylindrical portion 50A is press-fitted into the outer peripheral surface of the second cylindrical portion 50B. To be fixed. That is, the first split holder 40A and the second split holder 40B are fixed integrally with each other.

  Therefore, when the stator 1 is assembled, the first flange 60 and the second flange 60 are fastened to the stator housing 2 in a state where the first divided holder 40A and the second divided holder 40B are fixed to each other. Thus, the vibration and the generation of noise due to the vibration can be reduced.

  In the present embodiment, the first cylindrical portion 50A is press-fitted into the outer peripheral surface of the second cylindrical portion 50B. However, the present invention is not limited to this configuration, and the second cylindrical portion 50B A configuration may be adopted in which the first cylindrical portion 50A is press-fitted into the outer diameter.

(Fifth embodiment)
Next, a rotating electrical machine stator according to a fifth embodiment of the invention will be described.

  The stator 1 of the present embodiment has the same basic configuration as that of the second embodiment, but the first flange 60 protrudes from the one axial end of the first cylindrical portion 50A to the outer diameter side, and the second flange 70 is The second cylindrical portion 50B is different in that it protrudes from the one end portion in the axial direction to the outer diameter side.

  More specifically, in the present embodiment, as shown in FIG. 11, the first convex portion 64 and the second convex portion 74 are arranged so that the phases in the circumferential direction are different from each other. Further, the first housing flange 9 and the second housing flange 10 are formed so as to overlap the first cylindrical portion 50A and the second cylindrical portion 50B in the axial direction, respectively.

  Then, the bolt 68 inserted through the bolt hole 15 of the first housing flange 9 of the stator housing 2 extends from one axial end to the other axial end of the bolt mounting hole 66 of the first convex portion 64 of the first flange 60. The first flange 60 is fixed to the first housing flange 9 by screwing toward (to the right in FIG. 11).

  Further, the bolt 68 inserted through the bolt hole 14 of the second housing flange 10 of the stator housing 2 extends from the one axial end side to the other axial end side of the bolt mounting hole 76 of the second convex portion 74 of the second flange 70. The second flange 70 is fixed to the second housing flange 10 by screwing toward (to the right in FIG. 11).

  Thus, the fastening location of the stator housing 2 to be fastened with the first convex portion 64 of the first flange 60 and the second convex portion 74 of the second flange 70, that is, the first housing flange 9 and the second housing flange 10, Since it can arrange | position so that it may overlap with the 1st cylindrical part 50A and the 2nd cylindrical part 50B in an axial direction, respectively, it suppresses that the stator housing 2 enlarges to an axial direction, and with respect to the layout of a peripheral member It is possible to reduce the influence.

  Moreover, since the 1st convex part 64 and the 2nd convex part 74 are arrange | positioned so that the phase of the circumferential direction may mutually differ, it is possible to fasten the 1st flange 60 and the 2nd flange 70 from the same axial direction. Therefore, the assembling property of the holder with respect to the stator housing 2 is improved, and the production efficiency can be improved.

  In the present embodiment as well, as in the fourth embodiment, one of the first cylindrical portions 50A and the second cylindrical portion 50B is press-fitted into the outer peripheral surface of the other cylindrical portion. It does not matter as a configuration.

In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably.
For example, in the above-described embodiment, the stator housing 2 is described as a housing that is disposed on the outer diameter side of the holder 40 and supports the holder 40. However, the holder 40 is attached only to the stator housing 2. However, it may be configured to be attached to the engine block or the transmission case.

  In the above-described embodiment, the first flange 60 and the second flange 70 are configured to be provided integrally with the cylindrical portion 50 by press molding. However, a separate annular member is prepared, and this member is welded or the like. It is good also as a structure joined to the cylindrical part 50.

  The above-described embodiment is an example in which the present invention is applied to a stator of a hybrid vehicle or a drive motor. However, the present invention can also be applied to a drive motor in an electric vehicle and other motors and generators. It is.

1 Stator 2 Stator housing (housing)
5 annular stator group 6 power distribution member 9 first housing flange 10 second housing flange 11 terminal box 14 bolt hole 15 bolt hole 16 stator piece 17 split core 18 insulator 19 stator core 19a outer peripheral surface 20 coils 21U, 21V, 21W bus ring 25 resin Mold part 40 Holder 40A First divided holder 50A First tubular part 40B Second divided holder 50B Second tubular part 50 Tubular part 52 Inner peripheral surface 60 First flange 62 First base part 64 First convex part (first Fastening part)
66 Bolt mounting hole 68 Bolt 70 Second flange 72 Second base 74 Second convex portion (second fastening portion)
76 Bolt mounting hole 78 Bolt E Engine ES Output shaft M Electric motor (Rotating electric machine)
R Rotor T Transmission TS Input shaft W Drive wheel

Claims (8)

A split core configured by laminating a plurality of steel plates; and
A stator core configured by connecting the divided cores in the circumferential direction;
A holder fitted into the outer peripheral surface of the stator core;
A housing that is disposed on the outer diameter side of the holder and supports the holder;
A stator of a rotating electric machine comprising:
The holder is
A cylindrical portion in radial contact with the stator core;
A first flange projecting toward the outer diameter side from one axial end of the cylindrical portion;
A second flange projecting to the outer diameter side from the other axial end side than the first flange of the cylindrical portion;
Have
The stator of a rotating electrical machine, wherein the first flange and the second flange have a first fastening portion and a second fastening portion fastened and fixed to different portions of the housing. The first flange and the second flange are respectively formed at one axial end and the other axial end of the cylindrical portion,
2. The stator of a rotating electrical machine according to claim 1, wherein the first fastening portion and the second fastening portion are arranged so that phases in a circumferential direction are different from each other. The holder comprises a first divided holder and a second divided holder divided into one axial end and the other axial end,
The cylindrical portion is composed of a first cylindrical portion of the first divided holder and a second cylindrical portion of the second divided holder,
The first flange is provided on the first tubular portion,
The stator of a rotating electrical machine according to claim 1, wherein the second flange is provided in the second cylindrical portion. The first flange protrudes from the one end portion in the axial direction of the first tubular portion to the outer diameter side,
4. The stator of a rotating electrical machine according to claim 3, wherein the second flange protrudes outward from the other axial end of the second cylindrical portion. In the first fastening portion and the second fastening portion, the fastening portions of the housing to which the first flange and the second flange are fastened and fixed are respectively the shafts of the first tubular portion, the second tubular portion, and the shaft. The stator for a rotating electrical machine according to claim 4, wherein the stator overlaps in a direction. The first flange protrudes from the one end portion in the axial direction of the first tubular portion to the outer diameter side,
4. The stator of a rotating electrical machine according to claim 3, wherein the second flange protrudes from an end portion in the axial direction of the second cylindrical portion toward the outer diameter side. One of the first cylindrical portion and the second cylindrical portion is fixed to the outer peripheral surface of the other cylindrical portion, according to any one of claims 3 to 6. The stator of the rotating electrical machine according to item.   The stator of a rotating electrical machine according to any one of claims 3 to 7, wherein the first fastening portion and the second fastening portion are arranged so that phases in a circumferential direction are different from each other.

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