JP4548381B2 - Insulator, rotating electric machine, manufacturing method thereof, and electric vehicle - Google Patents

Description

  The present invention relates to an insulator, a rotating electric machine, a manufacturing method thereof, and an electric vehicle, and more particularly, to an insulator provided between a stator core and a stator coil, a rotating electric machine having the insulator, a manufacturing method thereof, and an electric vehicle.

A bobbin provided between an iron core and a coil is conventionally known.
For example, Japanese Patent Laying-Open No. 2000-311812 (Patent Document 1) discloses a bobbin that is divided into two in a direction orthogonal to the winding direction of the coil.

  Japanese Unexamined Patent Application Publication No. 2003-333781 (Patent Document 2) also discloses an insulator that can be divided into two.

  Japanese Patent Laid-Open No. 2002-44894 (Patent Document 3) discloses that an insulating member that insulates a coil and a core is composed of a plurality of insulating pieces divided in the circumferential direction.

Japanese Patent Laying-Open No. 2004-297986 (Patent Document 4) discloses an insulator including an elastic portion that is elastically deformed in a direction of narrowing an interval between end wall surfaces positioned on an end surface in a stacking direction of teeth.
JP 2000-31812 A JP 2003-333781 A JP 2002-44894 A JP 2004-297986 A

  There may be some variation in the thickness of the stator teeth to which the insulator is assembled. In this case, there is a concern that a time-consuming process is required to ensure the accuracy of assembly of the insulator.

  By the way, in patent document 1, although the bobbin is divided | segmented, changing the opening width of the combined bobbin is not assumed. Similarly, Patent Documents 2 and 3 do not assume that the opening width of the insulator is changed. Moreover, in patent document 4, although the opening width of an insulator can be changed by changing an elastic part, after winding a coil around an insulator, attaching this insulator to stator teeth is not assumed.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide high assembly accuracy when assembled to stator teeth and to improve the production efficiency of a rotating electrical machine. It is an object of the present invention to provide an insulator, a rotating electrical machine having the insulator, a manufacturing method thereof, and an electric vehicle.

  An insulator according to the present invention is an insulator that can be attached to a stator tooth in a state where a coil is wound, and includes a first member having a cylindrical portion including an outer peripheral surface that comes into contact with the coil, and a cylindrical portion And a second member having a columnar part including a wall surface forming an opening for receiving stator teeth together with an inner peripheral surface of the cylindrical part, and an opening width adjusting mechanism for adjusting the width of the opening.

  According to the said structure, the assembly | attachment precision of the insulator to a stator tooth can be improved, enabling it to adjust the width | variety of the opening which receives a stator tooth, suppressing a process becoming complicated.

  In the insulator, preferably, the first member and the second member can be divided in a direction in which the opening receives the stator teeth.

  In the insulator, preferably, the opening width adjusting mechanism includes a convex portion provided on one of the cylindrical portion of the first member and the columnar portion of the second member, and a concave portion provided on the other. Thereby, the opening width adjusting mechanism can be configured with a simple configuration.

  In the insulator, preferably, the opening width adjusting mechanism adjusts the axial width of the stator teeth of the opening. Thereby, the assembly | attachment precision of the insulator in the axial direction of stator teeth can be improved.

  In the insulator, preferably, the cylindrical portion of the first member has a rigidity that does not deform when the coil is wound. Thus, the coil can be wound without deforming the first member. Therefore, since the coil can be tightly wound around the first member, the coil density is improved.

  In the specification of the present application, “not deformed” includes a case where a slight deformation that is not actively intended occurs.

  A rotating electrical machine according to the present invention includes a stator tooth, a stator coil wound around the stator tooth, and the above-described insulator provided between the stator tooth and the stator coil.

  According to the said structure, the rotary electric machine with the high assembly | attachment precision of an insulator and high production efficiency is obtained.

  In the above rotating electric machine, the stator teeth preferably include a portion formed of laminated steel sheets.

  Variations in thickness are likely to occur in stator teeth made of laminated steel sheets. On the other hand, the assembly accuracy of the insulator can be improved by using the above-described insulator.

  The method of manufacturing a rotating electrical machine according to the present invention includes a step of winding a coil around an insulator, a step of assembling the insulator around which the coil is wound on a stator tooth, and a coil in the insulator assembled on the stator tooth. A step of adjusting the opening width of the portion while keeping the outer peripheral width of the portion made constant, and a step of connecting the winding of the coil assembled to the stator teeth and the bus bar.

  According to the above method, it is possible to improve the assembly accuracy of the insulator while ensuring the production efficiency of the rotating electrical machine.

  Preferably, the manufacturing method of the rotating electrical machine further includes a step of providing a resin portion on a coil connected to the bus bar.

  When the assembly accuracy of the insulator is low, it is necessary to increase the resin thickness margin when the resin portion is provided on the coil. On the other hand, since the margin of the resin thickness can be reduced by improving the assembly accuracy of the coil by the above method, the size of the rotating electrical machine can be reduced.

  An electric vehicle according to the present invention includes the above-described rotating electrical machine or the rotating electrical machine manufactured by the above-described rotating electrical machine manufacturing method.

  As a result, an electric vehicle having high insulator assembly accuracy and high production efficiency can be obtained.

  ADVANTAGE OF THE INVENTION According to this invention, while the assembly | attachment precision of an insulator can be improved, the production efficiency of a rotary electric machine can be improved.

  Embodiments of the present invention will be described below. Note that the same or corresponding portions are denoted by the same reference numerals, and the description thereof may not be repeated.

  Note that in the embodiments described below, when referring to the number, amount, and the like, the scope of the present invention is not necessarily limited to the number, amount, and the like unless otherwise specified. In the following embodiments, each component is not necessarily essential for the present invention unless otherwise specified. In addition, when there are a plurality of embodiments below, it is planned from the beginning to appropriately combine the features of each embodiment unless otherwise specified.

  FIG. 1 is a diagram showing a hybrid vehicle (HV) including a rotating electrical machine according to one embodiment of the present invention. In the present specification, the “electric vehicle” is not limited to the hybrid vehicle, and for example, a fuel cell vehicle and an electric vehicle are also included in the “electric vehicle”.

  Referring to FIG. 1, the hybrid vehicle includes a stator 10, a rotor 20, a shaft 30, a speed reduction mechanism 40, a differential mechanism 50, a drive shaft receiving portion 60, and a PCU (Power Control Unit) 70. And a battery 80 that is a rechargeable secondary battery.

  The stator 10 and the rotor 20 constitute a rotating electric machine (motor generator) having a function as an electric motor or a generator. The rotor 20 is assembled to the shaft 30. The shaft 30 is rotatably supported by the housing of the drive unit via a bearing.

  The stator 10 has a ring-shaped stator core. The stator core is configured by laminating plate-like magnetic bodies such as iron or iron alloy. A plurality of stator teeth and a slot portion as a recess formed between the stator teeth portions are formed on the inner peripheral surface of the stator core. The slot portion is provided so as to open to the inner peripheral side of the stator core.

  A stator coil including three winding phases, a U phase, a V phase, and a W phase, is wound around the teeth portion so as to fit into the slot portion. The U phase, the V phase, and the W phase are wound so as to deviate from each other on the circumference. The stator coil is connected to the PCU 70 via a power supply cable. The PCU 70 is electrically connected to the battery 80 via a power supply cable. Thereby, the battery 80 and the stator coil are electrically connected.

  The power output from the motor generator including the stator 10 and the rotor 20 is transmitted from the speed reduction mechanism 40 to the drive shaft receiving portion 60 via the differential mechanism 50. The driving force transmitted to the drive shaft receiving portion 60 is transmitted as a rotational force to the wheels (not shown) via the drive shaft (not shown), thereby causing the vehicle to travel.

  On the other hand, during regenerative braking of the hybrid vehicle, the wheels are rotated by the inertial force of the vehicle body. The motor generator is driven through the drive shaft receiving portion 60, the differential mechanism 50, and the speed reduction mechanism 40 by the rotational force from the wheels. At this time, the motor generator operates as a generator. The electric power generated by the motor generator is stored in the battery 80 via an inverter in the PCU 70.

  2 and 3 are perspective views showing the stator 10 (FIG. 2: before molding resin formation, FIG. 3: after molding resin formation), and FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3. 2 to 4, the stator 10 includes a stator core 110, a stator coil, a bus bar to which the stator coil is connected, a stator terminal module to which the bus bar is attached, a mold resin portion 120, and a partition plate 130. And the insulator 140.

  As shown in FIG. 2, the stator coil includes first to fourth U-phase coils 11U to 14U, first to fourth V-phase coils 11V to 14V, and first to fourth W-phase coils 11W to 14W.

  The first U-phase coil 11U is configured by winding a conducting wire 511U around a tooth, one end of the conducting wire 511U is connected to a first U-phase coil terminal 4111U, and the other end of the conducting wire 511U is a first U-phase coil terminal. Connected to 1111U.

  First V-phase coil 11V is formed by winding a conductive wire 511V around a tooth. One end of conducting wire 511V is connected to first V-phase coil terminal 1211V, and the other end of conducting wire 511V is connected to first V-phase coil terminal 2111V.

  First W-phase coil 11W is configured by winding conductive wire 511W around a tooth, one end of conductive wire 511W is connected to first W-phase coil terminal 2211W, and the other end of conductive wire 511W is connected to first W-phase coil terminal 3111W. The

  Second U-phase coil 12U is formed by winding conductive wire 512U around a tooth. Conductive wire 512U has one end connected to second U-phase coil terminal 3212U and the other end connected to second U-phase coil terminal 4112U.

  Second V-phase coil 12V is formed by winding a conductive wire 512V around a tooth. Conductive wire 512V has one end connected to second V-phase coil terminal 3212V and the other end connected to second V-phase coil terminal 1212V.

  Second W-phase coil 12W is formed by winding a conductive wire 512W around a tooth. Conductive wire 512W has one end connected to second W-phase coil terminal 3212W, and the other end connected to second W-phase coil terminal 2112W.

  Third U-phase coil 13U is formed by winding conductive wire 513U around a tooth. Conductive wire 513U has one end connected to third U-phase coil terminal 3313U, and the other end connected to third U-phase coil terminal 1313U.

  Third V-phase coil 13V is formed by winding a conductive wire 513V around a tooth. Conductive wire 513V has one end connected to third V-phase coil terminal 3313V, and the other end connected to third V-phase coil terminal 2313V.

  Third W-phase coil 13W is formed by winding conductive wire 513W around a tooth. Conductive wire 513W has one end connected to third W-phase coil terminal 3313W, and the other end connected to third W-phase coil terminal 3413W.

  Fourth U-phase coil 14U is formed by winding conductive wire 514U around a tooth. Conductive wire 514U has one end connected to fourth U-phase coil terminal 1314U, and the other end connected to fourth U-phase coil terminal 1114U.

  Fourth V-phase coil 14V is configured by winding a conductive wire 514V around a tooth. Conductive wire 514V has one end connected to fourth V-phase coil terminal 2314V, and the other end connected to fourth V-phase coil terminal 2114V.

  Fourth W-phase coil 14W is configured by winding conductive wire 514W around the teeth. Conductive wire 514W has one end connected to fourth W-phase coil terminal 3414W, and the other end connected to fourth W-phase coil terminal 3114W.

  Each coil terminal is provided so as to protrude from the rail 100. The said terminal has a recessed part and a connection with a conducting wire and a terminal is ensured because this recessed part receives each conducting wire. Each coil is wound around the insulator 140 before being assembled to the stator 110 to form a cassette coil. A partition plate 130 is provided between the plurality of coils, and the partition plate 130 ensures insulation between adjacent coils.

  Referring to FIGS. 3 and 4, rails and coils provided on stator core 110 are molded by mold resin portion 120 made of resin. Thereby, positioning of each coil is performed reliably and insulation between adjacent coils is ensured. The mold using such a resin is not limited to the formation of a molded body as shown in FIGS. 3 and 4, and an insulating resin such as varnish is applied to the surface of the coil to position each coil. A configuration for ensuring the above may be employed.

  FIG. 5 is a perspective view of a terminal module attached to the stator 10. Referring to FIG. 5, the terminal module has a rail 100. The rail 100 has a regular dodecagonal ring shape (annular shape) and is formed so as to surround a predetermined space. The shape of the rail 100 is not limited to a dodecagon, and may be another polygon. The shape of the rail 100 is determined according to the number of cassette coils arranged in the rail 100.

  The rail 100 is provided with an inner peripheral surface 105 and an outer peripheral surface 106, and both the inner peripheral surface 105 and the outer peripheral surface 106 are flat surfaces. The inner peripheral surface 105 and the outer peripheral surface 106 are located on the inner peripheral side and the outer peripheral side of the rail 100, and extend along the circumferential direction of the rail 100. The rail 100 is provided with a plurality of grooves 1001, 1002, 1003, 1004.

  The groove 1001 is located on the innermost peripheral side. A groove 1002 is disposed on the outer peripheral side of the groove 1001. The groove 1002 is disposed along the groove 1001 in parallel with the groove 1001. The groove 1003 is disposed outside the groove 1002 and parallel to the groove 1002 along the groove 1002. The groove 1004 is arranged outside the groove 1003 and parallel to the groove 1003 along the groove 1003.

  A plurality of bus bars are fitted into the grooves 1001 to 1004, and coil terminals extend from the bus bars so as to extend in the axial direction indicated by the arrow A. First U-phase coil terminals 1111U and 4111U as U-phase electrodes are fitted in grooves 1001 and 1004, respectively. First V-phase coil terminals 1211V and 2111V are fitted in grooves 1001 and 1002, respectively. First W-phase coil terminals 2111W and 3111W are fitted in grooves 1002 and 1003, respectively.

  Second U-phase coil terminals 3212U and 4112U are fitted in grooves 1003 and 1004, respectively. Second V-phase coil terminals 3212V and 1212V are fitted in groove 1003 and groove 1001, respectively. Second W-phase coil terminals 3212W and 2212W are fitted in groove 1003 and groove 1002, respectively.

  Third U-phase coil terminals 3313U and 1313U are fitted in groove 1003 and groove 1001. Third V-phase coil terminals 3313V and 2313V are fitted in groove 1003 and groove 1002. Third W-phase coil terminals 3313W and 3413W are fitted in groove 1003.

  Fourth U-phase coil terminals 1314U and 1114U are fitted in groove 1001. Fourth V-phase coil terminals 2314V and 2114V are fitted in groove 1002. Fourth W-phase coil terminals 3414W and 3114W are fitted in groove 1003.

  Note that which terminal is fitted in which groove is not particularly limited, and is particularly limited as long as the rotating electrical machine is driven by connecting the U-phase, V-phase, and W-phase coils. It is not a thing.

  A connector 102 is attached to the rail 100. Metal terminals provided in the connector 102 are connected to each bus bar.

  FIG. 6 is an exploded perspective view of a terminal module attached to the stator 10. With reference to FIG. 6, the annular grooves 1001, 1002, 1003, and 1004 provided in the rail 100 are each cut off in the middle. Ribs 101 for fixing the bus bar are formed in the grooves 1001, 1002, 1003, and 1004. The rib 101 is configured to extend in a polygonal axial direction (direction indicated by an arrow A). In the example of FIG. 6, at least one rib 101 is provided on one side of the polygon, but the rib 101 may not be provided on some sides. Further, all the ribs 101 may be omitted. Furthermore, two or more ribs 101 may be provided per side from the viewpoint of reliably pressing the bus bar.

  The bus bar includes first bus bars 11 to 13, second bus bars 21 to 23, third bus bars 31 to 34, and a fourth bus bar 41.

  The first bus bars 11, 12, and 13 are fitted in the groove 1001. The first bus bar 11 is provided with a first U-phase coil terminal 1111U and a fourth U-phase coil terminal 1114U. The first bus bar 11 is attached with connector terminals 11T. Electric power is supplied from the connector terminal 11 </ b> T, and this electric power is transmitted to the first bus bar 11. The first bus bar 12 is provided with a first V-phase coil terminal 1211V and a second V-phase coil terminal 1212V. The first bus bar 13 is provided with a third U-phase coil terminal 1313U and a fourth U-phase coil terminal 1314U.

  The second bus bars 21, 22, 23 are fitted into the grooves 1002. The second bus bar 21 is provided with a first V-phase coil terminal 2111V and a fourth V-phase coil terminal 2114V. Further, the connector terminal 21 </ b> T is attached to the second bus bar 21. Electric power is supplied from the connector terminal 21 </ b> T, and this electric power is transmitted to the second bus bar 21. The second bus bar 22 is provided with a first W-phase coil terminal 2211W and a second W-phase coil terminal 2212W. The second bus bar 23 is provided with a third V-phase coil terminal 2313V and a fourth V-phase coil terminal 2314V.

  The third bus bars 31, 32, 33, 34 are fitted into the grooves 1003. The third bus bar 31 is provided with a fourth W-phase coil terminal 3114W and a first W-phase coil terminal 3111W. The third bus bar 31 is attached with a connector terminal 31T. Electric power is supplied from the connector terminal 31 </ b> T, and this electric power is transmitted to the third bus bar 31. The third bus bar 32 is provided with a second U-phase coil terminal 3212U, a second V-phase coil terminal 3212V, and a second W-phase coil terminal 3212W. The third bus bar 33 is provided with a third U-phase coil terminal 3313U, a third V-phase coil terminal 3313V, and a third W-phase coil terminal 3313W. Third bus bars 32 and 33 serve as neutral points for connecting the U-phase coil, V-phase coil, and W-phase coil. Third bus bar 34 is provided with third W-phase coil terminal 3413W and fourth W-phase coil terminal 3414W.

  The fourth bus bar 41 is fitted in the groove 1004. The fourth bus bar 41 is provided with a first U-phase coil terminal 4111U and a second U-phase coil terminal 4112U.

  Although FIG. 6 shows a star-connected three-phase AC motor, the present invention is not limited to this. For example, the present invention may be applied to a delta-connected three-phase coil motor.

  When caulking is used instead of welding as a method for fixing the electromagnetic steel sheets constituting the stator core 110, the thickness of the stator core 110 tends to vary. As a result of variations in the thickness of the stator core 110, the position of the cassette coil is likely to shift when the insulator 140 is assembled to the stator teeth. As a result, there is a concern that the assembly accuracy of the cassette coil necessary for good connection between the coil terminal and the coil conductor cannot be obtained. In consideration of the efficiency of assembling the cassette coil and the like, it is necessary to form a certain gap between the cassette coil and the stator teeth. Therefore, the cassette coil moves when the mold resin portion 120 is provided. As a result of the above, there is a concern that a portion with a thin thickness of the mold resin portion 120 is generated. When the thickness of the mold resin portion 120 is thin, cracks and peeling due to thermal deterioration are likely to occur. Resin pieces that have fallen due to cracking or peeling can cause malfunctions such as being bitten by gears. The insulator 140 deals with this problem as follows.

  FIG. 7 is a perspective view showing the insulator 140. Referring to FIG. 7, the insulator 140 includes first and second members 141 and 142, an engaging portion 143, and an opening 144. The insulator 140 is assembled to the stator core 110 by the opening 144 receiving the stator teeth while the coil is wound. The first and second members are insulating members made of, for example, nylon resin or PPS resin. The first and second members 141 and 142 can be divided in a direction in which the opening 144 receives the stator teeth. The engaging portion 143 includes an opening 143A provided on the first member 141 side and a protrusion 143B provided on the second member 142 side. A plurality of openings 143A and protrusions 143B are provided so as to be aligned in the direction of adjusting the width of the opening 144. Then, by moving the first and second members 141 and 142 in the direction of arrow A, the axial width (L2) of the stator teeth of the opening 144 is adjusted in multiple stages.

  8 and 9 are perspective views showing the first and second members 141 and 142 in the insulator 140, respectively. Referring to FIG. 8, first member 141 includes a cylindrical portion 145 having an outer peripheral surface 145A and an inner peripheral surface 145B. An opening 143A is formed on the side surface of the cylindrical portion 145. The coil wound around the insulator 140 is wound around the cylindrical portion 145 of the first member 141, and the coil contacts the outer peripheral surface 145 </ b> A of the cylindrical portion 145. Referring to FIG. 9, the second member 142 has a columnar portion 146 located on the inner peripheral side of the cylindrical portion 145. The columnar portion 146 has a substantially U-shape. The columnar portion 146 includes a wall surface 146 </ b> A that forms the opening 144 together with the inner peripheral surface 145 </ b> B of the cylindrical portion 145. The protrusion 143 </ b> B constituting the engaging portion 143 is formed in the columnar portion 146.

  When the insulator 140 is actually assembled to the stator core 110, first, a coil is wound around the insulator 140 formed by combining the first and second members 141 and 142. The cylindrical portion 145 in the first member 141 has a rigidity that does not deform when the coil is wound. Next, the insulator 140 around which the coil is wound is assembled to the stator teeth. Then, the insulator 140 is fixed to the stator core 110 by adjusting the width (L1) of the opening 144. Here, the outer peripheral width (L1) of the cylindrical portion 145 of the first member 141 does not change. That is, the outer peripheral width (L1) of the portion of the insulator 140 where the coil is wound is constant. Therefore, the insulator 140 can absorb variations in the thickness of the stator core 110. The above process is performed for each stator tooth. Thus, the first to fourth U-phase coils 11U to 14U, the first to fourth V-phase coils 11V to 14V, and the first to fourth W-phase coils 11W to 14W are attached to the stator teeth. Thereafter, the coils 11U to 14U, 11V to 14V, and 11W to 14W are connected to the coil terminals in the first to fourth bus bars 11 to 13, 21 to 23, 31 to 34, and 41 by caulking. Thereby, the coil winding and the bus bar are electrically connected.

  According to the insulator according to the present embodiment, it is possible to adjust the width (L2) of the opening 144 that receives the stator teeth, thereby suppressing the complexity of the process, and the assembly accuracy of the insulator to the stator teeth. Can be improved.

  Further, by forming a plurality of openings 143A in the cylindrical portion 145 of the first member 141 and forming a protrusion 143B that engages with the opening 143A in the columnar portion 146 of the second member 142, the configuration is simple. The opening width (L2) can be adjusted in multiple stages.

  When the stator teeth are formed of laminated steel sheets, the thickness of the stator teeth tends to vary. On the other hand, in the insulator 140, by adjusting the axial width of the stator teeth in the opening 144, it is possible to suppress variations in the assembly position of the stator teeth in the axial direction.

  In addition, by using the insulator 140 according to the present embodiment, it is possible to reduce the resin thickness margin when the mold resin portion 120 is provided on the coil by improving the assembly accuracy of the coil in the stator 10. Therefore, it is possible to reduce the size of the rotating electrical machine.

  Furthermore, since the insulator 140 includes a double structure of the first and second members 141 and 142, the insulation performance as an insulator is improved. Moreover, the freedom degree of selection of the raw material of the insulator 140 for ensuring insulation increases. As a result, the cost is reduced.

  The above configuration is summarized as follows. That is, the insulator 140 according to the present embodiment is an insulator that can be attached to the stator teeth in a state where the coil is wound, and has a cylindrical portion 145 including an outer peripheral surface 145A that comes into contact with the coil. A second member 142 having a first member 141 and a columnar portion 146 that is located on the inner peripheral side of the cylindrical portion 145 and includes a wall surface 146A that forms an opening 144 that receives the stator teeth together with the inner peripheral surface 145B of the cylindrical portion 145; And an engaging portion 143 as an “opening width adjusting mechanism” for adjusting the width (L2) of the opening 144.

  The engaging portion 143 includes an opening 143A as a “concave portion” provided in the cylindrical portion 145 of the first member 141 and a protrusion as a “convex portion” provided in the columnar portion 146 of the second member 142. Part 143B. Here, a plurality of openings 143A and protrusions 143B are provided so as to be aligned in the direction in which the width of the opening 144 is adjusted. The engagement portion 143 adjusts the axial width of the stator teeth of the opening 144.

  As shown in FIG. 10, the method of manufacturing the rotating electrical machine according to the present embodiment includes a step of winding a coil around insulator 140 (S10), and a step of assembling insulator 140 around which the coil is wound to stator teeth ( S20) and a step (S30) of adjusting the opening width (L2) of the portion while keeping the outer peripheral width (L1) of the portion around which the coil is wound in the insulator 140 assembled to the stator teeth constant, A step of connecting the winding of the coil assembled to the stator teeth and the bus bar (S40), and a step of providing the mold resin portion 120 on the coil connected to the bus bar (S50).

  Although the embodiments of the present invention have been described above, the embodiments disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1 is a diagram schematically showing the configuration of an electric vehicle including an insulator according to one embodiment of the present invention. It is a figure which shows the stator containing the insulator which concerns on one embodiment of this invention. It is a figure which shows the state which provided the mold resin part in the stator shown by FIG. It is IV-IV sectional drawing in FIG. FIG. 4 is a perspective view of a terminal module attached to the stator shown in FIG. 3. FIG. 4 is an exploded perspective view of a terminal module attached to the stator shown in FIG. 3. It is a perspective view which shows the insulator attached to the stator shown by FIG. It is the perspective view which showed the 1st member in the insulator shown by FIG. It is the perspective view which showed the 2nd member in the insulator shown by FIG. It is a flowchart explaining the manufacturing method of the rotary electric machine which concerns on one embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Stator, 11-13 First bus bar, 21-23 Second bus bar, 31-34 Third bus bar, 41 Fourth bus bar, 11U-14U First to fourth U phase coil, 11V to 14V First to fourth V phase coil 11W-14W 1st-4th W-phase coil, 11T, 21T, 31T connector terminal, 20 rotor, 30 shaft, 40 speed reduction mechanism, 50 differential mechanism, 60 drive shaft receiving part, 70 PCU, 80 battery, 100 rail, 101 Rib, 102 Connector, 105 Inner peripheral surface, 106 Outer peripheral surface, 110 Stator core, 120 Mold resin portion, 130 Partition plate, 140 Insulator, 141 First member, 142 Second member, 143 Engagement portion, 143A Opening portion, 143B Protruding part, 144 opening, 145 cylindrical part Minute, 145A outer peripheral surface, 145B inner peripheral surface, 146 columnar portion, 146A wall surface.

Claims (10)

An insulator that can be attached to the stator teeth with the coil wound,
A first member having a cylindrical portion including an outer peripheral surface in contact with the coil;
A second member having a columnar portion located on the inner peripheral side of the cylindrical portion and including a wall surface forming an opening for receiving the stator teeth together with the inner peripheral surface of the cylindrical portion;
An insulator, comprising: an opening width adjusting mechanism for adjusting the width of the opening.   2. The insulator according to claim 1, wherein the first member and the second member can be divided in a direction in which the opening receives the stator teeth.   The said opening width adjustment mechanism contains the convex part provided in one of the said cylindrical part in the said 1st member, and the said columnar part in the said 2nd member, and the recessed part provided in the other. Item 3. The insulator according to item 2.   The insulator according to any one of claims 1 to 3, wherein the opening width adjusting mechanism adjusts an axial width of the stator teeth of the opening.   The insulator according to any one of claims 1 to 4, wherein the cylindrical portion of the first member has rigidity that does not deform when the coil is wound. With stator teeth,
A stator coil wound around the stator teeth;
The rotary electric machine provided with the insulator in any one of Claims 1-5 provided between the said stator teeth and the said stator coils.   The rotating electrical machine according to claim 6, wherein the stator teeth include a portion formed of a laminated steel plate. Winding a coil around an insulator;
Assembling the insulator around which the coil is wound to a stator tooth;
Adjusting the opening width of the portion while maintaining a constant outer peripheral width of the portion around which the coil is wound in the insulator assembled to the stator teeth;
A method of manufacturing a rotating electrical machine, comprising: connecting a winding of the coil assembled to the stator teeth and a bus bar.   The manufacturing method of the rotary electric machine of Claim 8 further provided with the process of providing a resin part on the said coil connected with the said bus-bar.   An electric vehicle comprising the rotating electrical machine according to claim 6 or 7, or the rotating electrical machine manufactured by the method for manufacturing a rotating electrical machine according to claim 8 or 9.

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