JP5853875B2 - Power collection and distribution ring and electric motor - Google Patents

Description

  The present invention relates to a power collection and distribution ring and an electric motor.

  2. Description of the Related Art Conventionally, for example, a current collection and distribution ring that collects and distributes motor current (collection and distribution) in a stator winding in a three-phase AC motor is known (see, for example, Patent Document 1).

  The electric motor described in Patent Document 1 has three annular power feeding members for feeding U-phase, V-phase, and W-phase, and these three annular power feeding members are collectively held by an annular holding member. . Each annular power supply member is formed by annularly connecting a plurality of arc-shaped members formed by bending a plate-shaped metal part into a predetermined shape. At both ends of the arc-shaped member, hook-shaped coil connecting portions are formed, and the end portions of the motor windings are connected to the coil connecting portions by caulking.

JP 2010-239771 A

  When assembling these three annular power supply members to the stator of the motor, it is necessary to insert the end portions of the motor windings into a plurality of coil connection portions formed on the respective annular power supply members. Since the three annular power feeding members are collectively held by the annular holding member, there are a plurality of operations for inserting the end portions of the motor windings in the coil connecting portion (18 in the case of the one described in Patent Document 1). Must be performed simultaneously for the coil connections.

  That is, even if the end of the motor winding cannot be inserted into one coil connection portion among the plurality of coil connection portions, the entire operation is reworked. It was difficult.

  Therefore, an object of the present invention is to provide a power collection / distribution ring that can be easily connected to a winding of a stator of an electric motor, and a motor including the power collection / distribution ring.

In order to solve the above problems, the present invention provides a plurality of annular bus rings for collecting and distributing power to the windings of the stator formed by winding the windings around a plurality of teeth arranged in a ring, A holding member that holds the plurality of bus rings, and the bus ring has terminals formed with connection portions to which the windings are connected at a plurality of locations in the circumferential direction, and the holding member includes the winding member. the ends of the line have a guide portion for guiding the connecting part of the terminal, the guide portion has an opening width in the one opening end portion of the winding is introduced, the ends of the windings It has a taper portion on the one opening side and a straight portion on the other opening side that is wider than the opening width in the other opening to be led, and the taper portion extends from the one opening to the straight portion. Facing the winding toward The width of the surface is gradually narrowed, the straight portion provides electrical collecting and distributing ring inner surface facing the winding is formed in a straight line along the axial direction of the bus ring.

  Further, the terminal is formed in a shape in which the connecting portion bends a plate-like conductor and sandwiches an end portion of the winding, and is electrically connected to the winding by caulking the connecting portion. The guide portion may have an opening width in the other opening that is narrower than a width of the connecting portion before caulking.

  In addition, a gap may be formed between the other opening of the guide portion and the connection portion.

  Moreover, this invention provides the electric motor provided with said power collection / distribution ring, the said stator, and the rotor rotated with respect to the said stator by the magnetic field of the said coil in order to solve the said subject.

  According to the power collection and distribution ring and the electric motor according to the present invention, the power collection and distribution ring can be easily connected to the winding of the stator of the motor.

It is explanatory drawing which shows the structural example of the power collection and distribution ring which concerns on embodiment of this invention, and an electric motor provided with the same. The holding member is shown, (a) is a plan view, (b) is a partially enlarged view of (a), and (c) is a cross-sectional perspective view taken along line AA of (a). The first to fourth bus rings are shown, (a) is a plan view, and (b) is a sectional view showing the first to fourth bus rings accommodated in the holding member. It is a perspective view which shows a terminal and its peripheral part. An arcuate conductor is shown, (a) is a perspective view, (b) is a plan view seen from the axial direction of the fourth bus ring. The guide part is shown, (a) is a cross-sectional view taken along the line BB of FIG. 2, (b) is an explanatory diagram in which the terminal and the end of the winding in FIG. It is the top view which looked at the guide part and its peripheral part from the end surface side. (A) is a perspective view which shows the power collection and distribution ring which concerns on 2nd Embodiment, (b) is a perspective view of a guide part, (c) is a side view of a guide part.

[First Embodiment]
A first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is an explanatory diagram showing a configuration example of a power collection and distribution ring according to an embodiment of the present invention and an electric motor including the same.

  The electric motor 1 includes a stator 11, a rotor 12, and a current collection and distribution ring 10 that collects and distributes motor current to the stator 11. In the electric motor 1, the power collection and distribution ring 10 and the stator 11 are arranged along the rotation axis of the rotor 12. In FIG. 1, the stator 11 is illustrated inside the power collection and distribution ring 10 for convenience.

  The stator 11 is formed by winding a plurality of windings 111, 112, 113 coated with insulation by, for example, enamel coating, around a plurality of teeth 110 made of a magnetic material arranged in an annular shape. A U-phase winding 111, a V-phase winding 112, or a W-phase winding 113 is wound around each tooth 110. In the present embodiment, the case where the windings 111, 112, and 113 are rectangular electric wires having a rectangular cross section will be described. However, the windings 111, 112, and 113 may be round electric wires having a circular cross section.

  The power collection and distribution ring 10 includes first to fourth bus rings 21 to 24 that perform power collection and distribution with respect to the windings 111, 112, and 113, and a holding member 3 that holds the first to fourth bus rings 21 to 24. And. The first to third bus rings 21 to 23 are provided with power supply terminals 21a, 22a, and 23a at one place in the circumferential direction. The power supply terminals 21a, 22a, and 23a protrude outward in the radial direction of the first to third bus rings 21 to 23, and are connected to output terminals of an inverter (not shown).

  The first to third bus rings 21 to 23 distribute the motor current output from the inverter to the U-phase, V-phase, and W-phase windings 111, 112, and 113, respectively. The fourth bus ring 24 is connected to one end of each of the windings 111, 112, and 113 as a neutral phase of the stator 11.

  One end 111 a of the U-phase winding 111 is electrically connected to the first bus ring 21. The other end 111 b of the U-phase winding 111 is electrically connected to the fourth bus ring 24. Similarly, one end portions 112a and 113a of the V-phase and W-phase windings 112 and 113 are electrically connected to the second and third bus rings 22 and 23, and the other ends of the windings 112 and 123 are connected. The ends 112 b and 113 b are electrically connected to the fourth bus ring 24.

  The rotor 12 includes a rotor core 120 that is rotatably supported coaxially with the stator 11 by a bearing (not shown), and a magnet 121 having a plurality of magnetic poles fixed to the outer peripheral surface of the rotor core 120.

  The U-phase, V-phase, and W-phase windings 111, 112, and 113 are supplied with sinusoidal motor currents whose phases are shifted from each other by 120 ° from an unillustrated inverter, thereby forming a rotating magnetic field in the stator 11. In the rotor 12, the magnet 121 receives a rotational force due to an attractive force and a repulsive force due to the rotating magnetic field, and rotates with respect to the stator 11 by the rotational force.

(Configuration of holding member)
2A and 2B show the holding member 3, wherein FIG. 2A is a plan view, FIG. 2B is a partially enlarged view of FIG. 2A, and FIG.

  The holding member 3 is made of, for example, a ring-shaped resin made of an injection-molded resin, and is formed in a U-shaped cross section having an accommodation space for accommodating the first to fourth bus rings 21 to 24. The holding member 3 has a plurality of first protrusions 301 formed on the bottom wall 300 corresponding to the first bus ring 21. Each of the plurality of first protrusions 301 has an arc shape and is formed along the first bus ring 21. The holding member 3 also has a plurality of arc-shaped second and third protrusions 302 and 303 formed on the bottom wall 300 corresponding to the second and third bus rings 22 and 23. .

  The plurality of first to third protrusions 301 to 303 are formed concentrically, the plurality of second protrusions 302 are outside the plurality of first protrusions 301, and the plurality of third protrusions 303 are the plurality of first protrusions 301. Two protrusions 302 are formed on the outer sides. The plurality of first to third protrusions 301 to 303 protrude from the bottom surface 300a of the holding member 3 on the bottom wall 300, and increase the creepage distance between the bottom surface 300a and the first to third bus rings 21 to 23. Yes.

  The holding member 3 is formed with a plurality of holding grooves 304 for accommodating a part of the fourth bus ring 24 and holding the fourth bus ring 24. Each of the plurality of holding grooves 304 has an arc shape and is formed to be recessed toward the bottom surface 300 a along the axial direction of the holding member 3. In the present embodiment, a plurality of holding grooves 304 are formed on the inner peripheral side of the plurality of first to third protrusions 301 to 303.

  In addition, the holding member 3 includes an inner wall 305 and an outer wall 306 that protrude in the direction perpendicular to the bottom surface 300 a from the inner peripheral side and outer peripheral side ends of the bottom wall 300. The inner wall 305 constitutes an inner peripheral surface of the holding groove 304. The outer wall 306 is formed continuously with the third protrusion 303.

  Further, the holding member 3 guides one end portions 111a, 112a, 113a of the windings 111, 112, 113 to connecting portions of terminals 211, 221, 231 of first to third bus rings 21-23 described later. Guides 31, 32, and 33 and the other ends 111 b, 112 b, and 113 b of the windings 111, 112, and 113 are guided to connection portions of terminals 241, 242, and 243 of the fourth bus ring 24 described later. Part 34 is provided. In the present embodiment, the holding member 3 has eight guide portions 31, 32 and 33 and 24 guide portions 34.

  The guide portion 31 is formed with an insertion hole 310 through which one end 111 a of the winding 111 is inserted. Similarly, insertion holes 320 and 330 through which one end portions 112 a and 113 a of the windings 112 and 113 are inserted are formed in the guide portions 32 and 33. Similarly, the guide portion 34 is formed with an insertion hole 340 through which the other ends 111b, 112b, 113b of the windings 111, 112, 113 are inserted. Details of the configuration of the guide portions 31 to 34 will be described later.

  The holding member 3 partitions the power feeding terminal holding portions 31a, 32a, and 33a that house the power feeding terminals 21a, 22a, and 23a, and the housing space for the first bus ring 21 and the housing space for the second bus ring 22. A plurality of partition walls 307 and a plurality of partition walls 308 partitioning the housing space of the second bus ring 22 and the housing space of the third bus ring 23.

(Configuration of the first to fourth bus rings)
FIG. 3 shows the first to fourth bus rings 21 to 24, (a) is a plan view, and (b) is the holding member for the first to fourth bus rings 21 to 24 housed in the holding member 3. FIG.

  The first bus ring 21 has an annular electric wire 210, terminals 211 arranged at a plurality of locations in the circumferential direction of the electric wire 210, and a power supply terminal 21 a. Both ends of the electric wire 210 are fixed by crimping to the power supply terminal 21a. The electric wire 210 is a round electric wire having a circular cross section, and includes a conductor 210a made of a metal having good conductivity such as copper, and an insulator 210b made of an insulating resin covering the conductor 210a. The insulator 210b is removed at the connection point between the terminal 211 and the electric wire 210, and one end of the terminal 211 is fixed to the exposed conductor 210a by caulking.

  Similarly, the second bus ring 22 includes an annular electric wire 220, terminals 221 disposed at a plurality of locations in the circumferential direction of the electric wire 220, and power supply terminals 22a, and both ends of the electric wire 220 are connected to the power supply terminals 22a. It is fixed by crimping. The third bus ring 23 includes an annular electric wire 230, terminals 231 disposed at a plurality of locations in the circumferential direction of the electric wire 230, and a power supply terminal 23a, and both ends of the electric wire 220 are added to the power supply terminal 22a. Tightened and fixed. The electric wires 220 and 230 include conductors 220a and 230a and insulators 220b and 230b made of an insulating resin that covers the conductors 220a and 230a. The conductors 220a and 230a are exposed by removing the insulators 220b and 230b. 221 and 231 are fixed by caulking.

  The terminals 211, 211, and 231 have one end portions 111a, 112a, and 113a of windings 111, 112, and 113 inserted through the insertion holes 310, 320, and 330 of the guide portions 31, 32, and 33 of the holding member 3, respectively. Connected.

  The fourth bus ring 24 is composed of a plurality of arcuate conductors 24A formed in an arcuate shape. In the present embodiment, the fourth bus ring 24 is composed of eight arcuate conductors 24A, and is configured in an annular shape as a whole.

  The arcuate conductors 24A are provided in the arcuately bent main body 240 and plural (three) circumferential positions of the main body 240 and projecting in the radial direction of the fourth bus ring 24 (three). Terminals 241, 242, and 243 are integrally provided. Details of the configuration of the arcuate conductor 24A will be described later.

  The first to fourth bus rings 21 to 24 are arranged concentrically, with the fourth bus ring 24 being arranged on the innermost side and the third bus ring 23 being arranged on the outermost side. The first bus ring 21 is disposed outside the fourth bus ring 24, and the second bus ring 22 is disposed between the first bus ring 21 and the third bus ring 23.

  The terminals 211, 221, 231 of the first to third bus rings 21 to 23 protrude radially inward of the electric wires 210, 220, 230, and the terminals 241, 242, 243 of the fourth bus ring 24 are connected to the main body 240. Projecting radially outward. The guide portions 31 to 34 are provided on the inner peripheral side of the electric wire 210 and on the outer peripheral side of the main body 240 of the arcuate conductor 24A.

  Since the terminals 211, 221, and 231 have the same configuration, the configuration will be described in detail using the terminal 221 as an example.

  FIG. 4 is a perspective view showing the terminal 221 and its peripheral part. The terminal 221 is formed by bending a plate-like conductor, and is connected to the first connection portion 221a connected to the conductor 220a of the electric wire 220 and the second connection connected to one end portion 112a of the winding 112. The unit 221c and the connecting part 221b for connecting the first connecting part 221a and the second connecting part 221c are integrally provided.

The connecting portion 221b includes a first connecting portion 221b ₁ extending from the first connecting portion 221a along the electric wire 220, and a first connecting portion 221b ₁ extending in parallel to the axial direction of the second bus ring 22 from the end of the first connecting portion 221b ₁ . The second connecting portion 221b ₂ and the third connecting portion 221b ₃ extending inward along the radial direction of the second bus ring 22 from the end portion of the second connecting portion 221b ₂ . The second connecting portion 221c are provided continuously to the third connecting portion 221b _3, is formed in a U-shape so as to surround the one end portion 112a of the winding 112.

  In the terminal 221, the first connecting portion 221 a is fixed by crimping to the conductor 220 a of the electric wire 220, and the second connecting portion 221 c is fixed by crimping to one end portion 112 a of the winding 112. The conductor 220a and the winding 112 are electrically connected. That is, the terminal 221 is electrically connected to one end 112a of the winding 112 by crimping the second connecting portion 221c. The second connecting portion 221c corresponds to the “connecting portion” of the present invention.

  5A and 5B show the arcuate conductor 24A, where FIG. 5A is a perspective view and FIG. 5B is a plan view of the fourth bus ring 24 as viewed from the axial direction. The arcuate conductor 24A is formed by bending a plate-like conductor obtained by punching a metal plate made of a highly conductive metal such as copper.

  The main body 240 of the arcuate conductor 24A is bent at two bent portions 240a and formed in an arc shape. The terminal 241 is provided at the center of the body 240 in the circumferential direction, and the terminals 242 and 243 are provided at both ends of the body 240.

  The terminal 241 includes a first connecting portion 241a extending from the main body 240 in parallel to the axial direction of the fourth bus ring 24, a second connecting portion 241b extending from the end of the first connecting portion 241a along the main body 240, and a second connecting portion 241b. And a connecting portion 241c that is formed in a U shape and protrudes outward in the radial direction of the fourth bus ring 24 from the end of the two connecting portions 241b.

  Similarly, the terminals 242 and 243 extend along the main body 240 from the end portions of the first connecting portions 242a and 243a extending from the main body 240 in parallel to the axial direction of the fourth bus ring 24 and the first connecting portions 242a and 243a. Second connecting portions 242b and 243b that extend, and connecting portions 242c and 243c that are formed in a U-shape and project outward in the radial direction of the fourth bus ring 24 from the ends of the second connecting portions 242b and 243b. Have.

  The terminals 241, 242, and 243 are electrically connected to the end portions 111b, 112b, and 113b of the windings 111, 112, and 113 by crimping the connection portions 241c, 242c, and 243c.

  The arcuate conductor 24A is held by the holding member 3 with the main body 240 accommodated in the holding groove 304 (see FIGS. 2 and 3). The terminals 241, 242, and 243 are located outside the holding groove 304, and the connecting portions 241c, 242c, and 243c face the guide portion 34 in the extending direction of the insertion hole 340. A predetermined gap is formed between the connecting portions 241 c, 242 c, 243 c and the guide portion 34.

(Configuration of guide section)
6A and 6B show the guide portion 34, where FIG. 6A is a cross-sectional view taken along the line BB in FIG. 2, and FIG. 6B is an explanatory view in which the terminal 242 and the end portion 112b of the winding 112 are added in FIG. is there.

  The insertion hole 340 passes through the guide portion 34 in the thickness direction of the bottom wall 300 (the axial direction of the holding member 3). The end 112b of the winding 112 is introduced into the insertion hole 340 from one opening 34a of the insertion hole 340 toward the other opening 34b, and protrudes from the other opening 34b. In the present embodiment, the length dimension of the insertion hole 340 is set to be longer than the thickness dimension of the bottom wall 300 and shorter than the dimension of the inner wall 305 and the outer wall 306 in the width direction (the axial direction of the holding member 3). Has been. In the example shown in FIG. 6, the dimension in the length direction of the insertion hole 340 is set to be longer than one half of the dimension in the width direction of the inner wall 305 and the outer wall 306.

  The guide part 34 has a tapered part 341 on one opening 34a side and a straight part 342 on the other opening 34b side. The tapered portion 341 and the straight portion 342 communicate with each other along the insertion hole 340.

  The tapered portion 341 is formed in a funnel shape in which the width of the inner surface 341 a facing the winding 112 is gradually narrowed from one opening 34 a toward the straight portion 342. In the straight portion 342, an inner surface 342 a facing the winding 112 is formed in a linear shape along the axial direction of the fourth bus ring 24.

The opening width w ₁ in one opening 34 a of the guide portion 34 is formed wider than the opening width w ₂ in the other opening 34 b (w ₁ > w ₂ ). The width of the insertion hole 340 of the straight section 342 (the radial direction of the holding member 3 of the width) is constant opening width w _1. The width of the insertion hole 340 in the taper portion 341 in the same direction changes at a constant rate from the opening width w ₁ to the opening width w ₂ .

  In FIG. 6, the shape of the guide portion 34 in the cross section along the radial direction of the holding member 3 is shown, but the tapered portion 341 and the straight portion 342 are similarly formed in the cross section along the circumferential direction of the holding member 3. Is formed. That is, the opening width of one opening 34a in the circumferential direction of the holding member 3 is formed wider than the opening width in the same direction of the other opening 34b.

As shown in FIG. 6 (b), between the connecting portion 242c of the other opening 34b and the terminal 242 of the guide portion 34, a gap S ₁ is formed in the direction along the extending direction of the insertion hole 340 . That is, the other opening 34b side of the end face 34c of the guide portion 34 is opposed to the connecting portion 242c through the clearance _{S 1.} The distance _{d 1} of the gap _{S 1} is, for example, 0.5mm or more. A desirable range of the distance d1 is _{1 to} 5 mm (1 mm or more and 5 mm or less).

  FIG. 7 is a plan view of the guide part 34 and its peripheral part as viewed from the end face 34c side.

The connection portion 242c of the terminal 242 has a U shape formed by bending a plate-like conductor, and is configured to surround the end portion 112b of the winding 112 protruding from the insertion hole 340 from three directions. . The connecting portion 242c is formed between the first plate portion 242c ₁ and the second plate portion 242c ₂ which are flat plates facing each other in the circumferential direction of the holding member 3, and between the first plate portion 242c ₁ and the second plate portion 242c ₂ . consisting arcuate curved portions 242c ₃ Prefecture. Thus, the connecting portion 242c is formed in a shape to sandwich the end portion 112b of the winding 112 between the first plate portion 242c ₁ and the second plate portion 242c _2.

Opening width _{w 4} of the opening 34b of the guide portion 34 in the circumferential direction of the holding member 3 has a width _{w 3} of the connecting portion 242c between the first plate portion 242c ₁ and the second plate portion 242c ₂ (first plate portion 242c ₁ and the width between the opposing surfaces of the second plate portion 242c ₂ ) (w ₄ <w ₃ ). Further, the opening width w ₆ (= w ₂ ) of the opening 34b in the radial direction of the holding member 3 is narrower than the interval w _{5 in} the same direction between the curved portion 242c ₃ and the second connecting portion 242b (w ₆ < w _5). Accordingly, the connection portion 242c of the terminal 242 is configured to face the end surface 34c of the guide portion 34 in the extending direction of the insertion hole 340 and not to face the opening 34b.

  The tapered portion 341 and the straight portion 342 do not necessarily have to be formed so as to surround the entire circumference of the end portion 112b of the winding 112, and a part in the circumferential direction may be cut away. In this case, in order to ensure a creepage distance from the first to third bus rings 21 to 23, a portion corresponding to the inner side in the radial direction of the holding member 3 may be cut out.

  Further, the guide portions 31, 32, and 33 of the holding member 3 are formed to have a tapered portion and a straight portion, similarly to the guide portion 34. However, when a part is cut out in the circumferential direction, a portion corresponding to the outer side in the radial direction of the holding member 3 is cut out in order to secure a creeping distance from the fourth bus ring 24 (arc-shaped conductor 24A). It is good to be. FIG. 2B shows a case where the portions corresponding to the outer side in the radial direction of the holding member 3 in the guide portions 31, 32, and 33 are cut out.

  In the electric motor 1 configured as described above, power supply terminals 21a, 22a, and 23a are connected to an unillustrated inverter, and winding is performed via the terminals 211, 221, and 231 of the first to third bus rings 21 to 23. The three-phase alternating current output from the inverter is supplied to one end 111a, 112a, 113a of 111, 112, 113. The other ends 111b, 112b, 113b of the windings 111, 112, 113 are connected to the fourth bus ring 24 as a neutral phase, and a rotating magnetic field due to a three-phase alternating current is applied to the windings 111, 112, 113. As a result, the rotor 12 rotates relative to the stator 11.

(Operation and effect of the first embodiment)
According to the first embodiment described above, the following operations and effects can be obtained.

(1) One end portions 111a, 112a, and 113a of the windings 111, 112, and 113 are guided by the guide portions 31 to 33 of the holding member 3 to the connection portions of the terminals 211, 221, and 231 and the other end portion. 111b, 112b, and 113b are guided by the guide portion 34 to the connection portions 241c, 242c, and 243c of the terminals 241, 242, and 243 of the fourth bus ring 24 (arc-shaped conductor 24A). Thereby, compared with the case where the holding member 3 does not have the guide parts 31 to 34, the first to fourth bus rings 21 to 24 of the power collection and distribution ring 10 are wound with the windings 111, 112, 112 of the stator 11 of the electric motor 1. The work of connecting to 113 becomes easy.

(2) Since the guide portion 34 is formed so that the opening width in one opening 34a into which the end portion 112b of the winding 112 is introduced is wider than the opening width in the other opening 34b, for example, both the openings 34a and 34b Compared with the case where the opening width is the same, the operation of inserting the end 112b of the winding 112 into the insertion hole 340 is facilitated. The same applies to the other guide portions 31 to 33.

(3) Since the guide part 34 has the taper part 341 and the straight part 342, the taper part 341 facilitates the introduction of the end 112 b of the winding 112 into the insertion hole 340, and the straight part 342 easily leads to winding 112 in the connection portion 242c (between the first plate portion 242c ₁ and the second plate portion 242c _2). That is, even when the end 112b of the winding 112 is inclined with respect to the central axis of the insertion hole 340, the inclination of the end 112b of the winding 112 is corrected by following the inner surface 342a of the straight portion 342. , the end portion 112b of the winding 112 derived from the opening 34b is easily enters between the first plate portion 242c ₁ and the second plate portion 242c _2. Further, since the guide portion 34 is provided with the taper 341, a clearance is formed between the guide portion 34 (insertion hole 340) and the end portion 112 b of the winding 112, for example, the end of the guide portion 34 and the winding 112. Even if the portion 112b is slightly deviated, the end 112b of the winding 112 can be inserted.

(4) Since the connecting portion 242c is formed by bending a plate-like conductor into a U shape, its manufacture is easy. The width w ₃ between the first plate portion 242c ₁ and the second plate portion 242c ₂ sandwiching the end portion 112b of the winding 112 is the opening width w of the opening 34b of the guide portion 34 in the circumferential direction of the holding member 3. _Since it is wider than ₄ , for example, when both widths are equal (w ₃ = w ₄ ), or when the width w ₃ is narrower than the opening width w ₄ (w ₃ <w ₄ ), it is derived from the opening 34b. windings 112 of the end portion 112b is likely to enter between the first plate portion 242c ₁ and the second plate portion 242c _2.

(5) between the connecting portion 242c of the opening 34b and the terminal 242 of the guide portion 34, since the gap _{S 1} is formed in the direction along the extending direction of the insertion hole 340, when crimped connection portion 242c In addition, it is possible to avoid the connection portion 242c or the caulking tool from interfering with the guide portion 34.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG.

  FIG. 8A is a perspective view showing a power collection and distribution ring 10 according to the second embodiment. In the power collection and distribution ring 10 according to the first embodiment, the first to fourth bus rings 21 to 24 are held by the holding member 3, but in the power collection and distribution ring 10A according to the present embodiment, the first Thru | or the 4th bus rings 21-24 are resin-molded by the ring-shaped holding member 4, the terminal 211 of the 1st bus ring 21, the terminal 221 of the 2nd bus ring 22, and the terminal 231 of the 3rd bus ring 23. A part of the terminals 241 to 243 of the fourth bus ring 24 protrudes inward from the inner peripheral surface 4 a of the holding member 4.

  As shown in FIG. 1, this power collection and distribution ring 10 </ b> A is connected to the stator 11 and constitutes the electric motor 1 together with the rotor 12, as in the case of the power collection and distribution ring 10 according to the first embodiment. The first to third bus rings 21 to 23 are connected to power supply wires 21b, 22b, and 23b at one place in the circumferential direction, and are provided with power supply terminals 21c, 22c, and 23c at their respective tips. . The power supply terminals 21c, 22c, and 23c are connected to output terminals of an inverter (not shown).

  One end portions 111 a, 112 a, 113 a of the windings 111, 112, 113 of the stator 11 are connected to connection portions of terminals 211, 2221, 231 protruding from the inner peripheral surface 4 a of the holding member 4. The other ends 111b, 112b, and 113b of the windings 111, 112, and 113 are connected to connection portions of terminals 241 to 243 that protrude from the inner peripheral surface 4a.

  The holding member 4 has guide portions 41, 42, and 43 that guide one end portions 111 a, 112 a, and 113 a of the windings 111, 112, and 113 to connection portions of the terminals 211, 221, and 231. In addition, the holding member 4 has a guide portion 44 that guides the other end portions 111b, 112b, and 113b of the windings 111, 112, and 113 to the connection portions of the terminals 241 to 243.

  In this embodiment, since the guide portions 41 to 44 are formed in the same shape, the guide portion 44 provided corresponding to the terminal 242 will be described in detail as an example.

  FIG. 8B is a perspective view of the guide portion 44, and FIG. 8C is a side view of the guide portion 44.

As in the first embodiment, the terminal 242 has a flat plate-like first plate portion 242c ₁ and a first plate portion 242c ₁ in which the connection portion 242c to which the end portion 112b of the winding 112 is connected faces each other in the circumferential direction of the holding member 4 It consists of _two plate portions 242c ₂ and an arcuate curved portion 242c ₃ between the first plate portion 242c ₁ and the second plate portion 242c ₂ . Guide portion 44 guides the end portion 112b of the winding 112 between the first plate portion 242c ₁ and the second plate portion 242c _2.

  The guide part 44 has a taper part 44a and a straight part 44b. The taper portion 44a includes a pair of first guide plates 441. The pair of first guide plates 441 are arranged side by side in the circumferential direction of the holding member 4 so as to be inclined with respect to the axial direction of the holding member 4 and protrude so as to be orthogonal to the inner peripheral surface 4a. In addition, the pair of first guide plates 441 has a width (in the circumferential direction of the holding member 4) of the first space 440 a (shown in FIG. 8C) between the inner surfaces 441 a facing the end 112 b of the winding 112. Width) is formed so as to gradually narrow toward the straight portion 44b.

  The straight portion 44 b includes a pair of second guide plates 442. The pair of second guide plates 442 are arranged in parallel with each other in the circumferential direction of the holding member 4 and project so as to be orthogonal to the inner peripheral surface 4a. Further, in the pair of second guide plates 442, the width of the second space 440b (the width in the circumferential direction of the holding member 4) between the inner surfaces 442a facing the end 112b of the winding 112 is constant. The width of the second space 440b is the same as the width of the first space 440a at the end of the tapered portion 44a on the straight portion 44b side. The inner surface 442 a is formed in a linear shape along the axial direction of the holding member 4.

  One first guide plate 441 of the pair of first guide plates 441 and one second guide plate 442 of the pair of second guide plates 442 are integrally formed continuously. Also, the other first guide plate 441 and the other second guide plate 442 are integrally formed continuously.

The end portion 112b of the winding 112 is inserted into the insertion space 440 including the first space 440a and the second space 440b from the first space 440a side. End 112b of the winding 112 is derived from the second space 440b side, it is guided between the first plate portion 242c ₁ and the second plate portion 242c ₂ of the terminal 242. The width of the second space 440b is formed to be narrower than the width between the first plate portion 242c ₁ and the second plate portion 242c ₂ of the connecting portion 242c of the pin 242.

A gap S <b> ₂ is formed between the pair of second guide plates 442 and the connection part 242 c of the terminal 242.

  Also according to the present embodiment, the same operations and effects as those described in the first embodiment can be obtained.

  While the embodiments of the present invention have been described above, the embodiments described above do not limit the invention according to the claims. In addition, it should be noted that not all the combinations of features described in the embodiments are essential to the means for solving the problems of the invention.

  Further, the present invention can be implemented with appropriate modifications without departing from the scope of the invention. For example, in the first embodiment, the case where the fourth bus ring 24 is configured by a plurality of arcuate conductors 24A has been described. However, the present invention is not limited to this, and the fourth bus ring 24 has one annular shape. And a plurality of terminals connected to the conductor. In this case, the fourth bus ring 24 may be a round electric wire having a circular cross section in which a conductor made of a metal such as copper is covered with an insulating resin.

DESCRIPTION OF SYMBOLS 1 ... Electric motor, 3, 4 ... Holding member, 4a ... Inner peripheral surface 10, 10A ... Power collection and distribution ring, 11 ... Stator, 12 ... Rotor, 21a, 22a, 23a ... Feed terminal, 21-24 ... 1st thru | or 1st 4 bus rings, 21b, 22b, 23b ... feeder wires, 21c, 22c, 23c ... feeder terminals, 24A ... arcuate conductors, 31-34, 41-44 ... guide portions, 31a, 32a, 33a ... feeder terminal holdings Part 34a ... one opening 34b ... the other opening 34c ... end face 41, 42, 43, 44 ... guide part 44a ... taper part 44b ... straight part 110 ... teeth 111, 112, 113 ... winding 111a, 112a, 113a ... one end, 111b, 112b, 113b ... the other end, 120 ... rotor core, 121 ... magnet, 210 ... electric wire, 210, 220, 23 ... wire, 210a, 220a, 230a ... conductor, 210 b, 220b, 230b ... insulator, 211, 221, 231 ... terminal, 221a ... first connecting portion, 221b ... connection portion, 221b 1 _... first coupling portion, 221b ₂ ... 2nd connection part, 221b ₃ ... 3rd connection part, 221c ... 2nd connection part (connection part), 240 ... main body, 241-243 ... terminal, 240a ... bending part, 241a, 242a, 243a ... 1st Connecting part, 241b, 242b, 243b ... second connecting part, 241c, 242c, 243c ... connecting part, 242c ₁ ... first plate part, 242c ₂ ... second plate part, 242c ₃ ... curved part, 300 ... bottom wall, 300a ... bottom surface, 301 ... first projection, 302 ... second projection, 303 ... third projection, 304 ... holding groove, 305 ... inner wall, 306 ... outer wall, 307,308 ... partition wall 310, 320, 330, 340 ... insertion hole, 341 ... tapered portion, 341a ... inner surface, 342 ... straight portion, 342a ... inner surface, 440 ... insertion space, 440a ... first space, 440b ... second space, 441 ... first guide plates, 441a ... inner surface, 442 ... second guide plate, 442a ... inner surface, _{S 1,} S 2 _... clearance

Claims (4)

A plurality of annular bus rings for collecting and distributing power to the windings of the stator formed by winding the windings around a plurality of teeth arranged in a ring;
A holding member for holding the plurality of bus rings,
The bus ring has terminals formed with connection portions to which the windings are connected at a plurality of locations in the circumferential direction,
The holding member may have a guide portion for guiding the ends of the windings to the connecting portion of the terminal,
The guide portion has an opening width at one opening into which the end portion of the winding is introduced is wider than an opening width at the other opening from which the end portion of the winding is led out, and is tapered on the one opening side. And a straight portion on the other opening side,
The taper portion gradually narrows the width of the inner surface facing the winding from the one opening toward the straight portion,
The straight portion is a power distribution ring in which an inner surface facing the winding is formed in a straight line along the axial direction of the bus ring. The terminal is formed in a shape in which the connection portion bends a plate-like conductor and sandwiches an end portion of the winding, and is electrically connected to the winding by caulking the connection portion,
The guide portion has an opening width in the other opening that is narrower than a width of the connecting portion before caulking,
The power collection and distribution ring according to claim 1 . A gap is formed between the other opening of the guide portion and the connection portion.
The power collection and distribution ring according to claim 1 or 2 . The power collection and distribution ring according to any one of claims 1 to 3 ,
The stator;
An electric motor comprising: a rotor that rotates relative to the stator by a magnetic field of the winding.

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