JP6196935B2 - Motor stator - Google Patents

Description

  The present invention relates to a stator for a motor including a plurality of teeth arranged along a circumferential direction and a plurality of coils wound around the teeth.

  As a stator incorporated in a motor, a stator formed by arranging a plurality of split core portions having teeth and coils wound around the teeth via an insulating member attached to the teeth is patented. It is proposed in Document 1.

  In Patent Literature 1, a plurality of groove portions (U-phase, V-phase, W-phase, and neutral-point coil ends are held on the outer side in the radial direction of the stator in each insulating member to hold coil ends drawn from the coils. Four groove portions) are provided, and the coil ends of the respective phases and the coil ends of the neutral points are respectively inserted into the four groove portions of the plurality of divided core portions arranged annularly in the circumferential direction of the stator. It is disclosed to be routed in the direction.

  In this case, a stator core in which each divided core portion is arranged in an annular shape is configured by drawing each coil terminal in the circumferential direction and accommodating it in each groove portion. Therefore, the stator is configured by press-fitting the stator core into the holder, connecting the coil terminals in the same phase, and forming a connection portion for each phase.

JP 2012-228152 A

  However, since the stator core is formed in a cylindrical shape by arranging a plurality of divided core portions in an annular shape, when the stator core is press-fitted into the holder, each divided core portion is brought radially inward, and the stator core is entirely It shrinks radially inward. As a result, the outer diameter of the stator core is reduced, and at least a part of each coil terminal housed in each groove is loosened radially outward.

  In addition, when connecting in-phase coil terminals to each other to form a connection portion for each phase, for example, after bundling in-phase coil terminals, each coil terminal and a terminal such as a bus bar are joined by fusing for each phase. By doing so, a connection part is formed. Therefore, when the contact operation between the coil terminals is repeated in the process of bundling the coil terminals and performing fusing, the coil terminals accommodated in the groove portions are loosened.

  In addition, when connecting the terminal attached to the connection part and the terminal of the cable of each phase, if the position of each terminal is finely adjusted, the root part of each coil terminal bundled for each phase will move. Become. As a result, the holding force of each groove part with respect to each coil terminal falls, and each coil terminal accommodated in each groove part may loosen radially outside.

  If a part of the coil terminal is thus loosened and exposed from the groove, the electrical insulation performance of the coil terminal may be affected. In this case, the process of drawing each coil terminal in the circumferential direction and accommodating it in each groove part is all redone, and it is necessary to rewind the coils of all the divided core parts, so that the stator yield is reduced and the manufacturing cost is reduced. May increase.

  The present invention has been made in consideration of such various problems. By suppressing the coil terminal from coming out of the groove portion, both the reduction in the stator yield and the increase in the manufacturing cost are achieved. An object of the present invention is to provide a motor stator that can be suppressed.

A stator of a motor according to the present invention includes a plurality of teeth arranged along a circumferential direction, a plurality of coils wound around the teeth, and a holder that accommodates the plurality of teeth and the plurality of coils. In the coil, in-phase coils of the plurality of phase coils are connected in parallel to each other. The stator includes a coil winding portion wound around the teeth, a coil terminal drawn from the coil winding portion and routed along the circumferential direction, and a coil of the plurality of phases. And a connection portion in which the coil terminals having the same phase are connected to each other.

  And the stator which concerns on this invention has the following characteristic structures, in order to achieve said objective.

That is, the stator is provided with a groove portion having an opening formed toward the radially outer side of the stator and includes an insulating member attached to the teeth, and the coil terminal is accommodated in the groove portion. A cover member that is disposed in a gap between the holder and the insulating member and closes the groove portion in which the coil terminal is accommodated is attached to the groove portion.

  According to this characteristic configuration, since the groove portion that accommodates the coil terminal is closed by the cover member, when the stator is manufactured, the coil terminal is routed along the circumferential direction to the groove portion. After the housing, when the divided core portions (cylindrical stator cores) arranged in an annular shape are press-fitted into the holder, the coil terminals can be prevented from coming out of the groove portions.

  Thus, in the assembly process of the stator (for example, connection between the coil terminals, press-fitting of the stator core into the holder) after the coil terminals are accommodated in the grooves, the coil terminals are Since it can suppress going out of a groove part, both the fall of the yield of the said stator and the increase in the manufacturing cost of the said stator can be suppressed.

Here, front Symbol cover member is formed in an annular shape, it is secured to the insulating member in the radial direction outside the opening. Thereby, the cover member can be easily fixed to the insulating member. The cover member can be more easily fixed by press-fitting the cover member into the insulating member outside the opening in the radial direction.

  Moreover, if a notch part is provided in the position corresponding to the said connection part of the said cover member, interference with the said connection part and the said cover member can be suppressed.

  Further, if the cover member is formed in an arc shape by cutting out the position where the connection portion is arranged in the circumferential direction, and the opening portion is closed by the arc-shaped portion of the cover member, the connection portion and The cover member can be easily attached to the insulating member without causing interference with the cover member.

Furthermore, the multi-phase connection portion is provided to protrude outside the groove portion at a predetermined position in the circumferential direction, and the stator is connected to the multi-phase connection portion by bundling in-phase coil terminals. It is preferable to provide a holding member that holds them together while being separated from each other . Thereby, it can suppress more effectively that the said coil terminal comes out of the said groove part in the assembly process of the said stator after accommodating the said coil terminal in the said groove part.

  Moreover, the stator of the motor according to the present invention may have the following characteristic configuration instead of the above-described characteristic configuration.

That is, the stator includes an insulating member provided with a groove having an opening at at least one end, the coil terminal is accommodated in the groove, and the connection portions of the plurality of phases are predetermined in the circumferential direction. The stator includes a holding member that protrudes to the outside of the groove portion at a position, and holds the plurality of phase connection portions, which are bundled and connected in-phase coil terminals, in a separated state .

  According to this characteristic configuration, at the time of manufacturing the stator, after the coil terminal is routed along the circumferential direction and accommodated in the groove part, the connection parts (parts where the coil terminals of the same phase are bundled) ) Are held together by the holding member. Thereby, even if the bundle of the coil terminals of a certain phase is pulled outside the groove portion, the bundle of the coil terminals of another phase is positioned and fixed by the holding member, and the relative position is regulated. The movement of the bundle of coil terminals in a certain phase can also be restricted.

  As a result, even if the bundle of the coil terminals of each phase is simultaneously pulled to the outside of the groove portion, each bundle is positioned in the circumferential direction of the stator by the holding member. The movement of the bundle can be regulated.

  As described above, by restricting the movement of the portion where the coil terminals are bundled in the connection portion with the holding member, the coil terminals of a predetermined phase (portions routed along the circumferential direction) The outward movement of the groove is also restricted. As a result, in the assembly process of the stator after accommodating the coil terminal in the groove part, it is possible to suppress the coil terminal from coming out of the groove part. Therefore, even in this characteristic configuration, it is possible to suppress both a decrease in the yield of the stator and an increase in the manufacturing cost of the stator.

  According to the present invention, it is possible to suppress both a decrease in stator yield and an increase in manufacturing cost by suppressing the coil terminal from coming out of the groove.

It is a top view of the stator which concerns on this embodiment. It is a circuit diagram of the stator of FIG. FIG. 2 is a substantial wiring diagram of a coil corresponding to the front view of FIG. 1, in which some of the V-phase and W-phase coils are omitted and a U-phase coil is depicted; It is a perspective view of the division | segmentation core part which comprises the stator of FIG. It is a disassembled perspective view of the division | segmentation core part of FIG. It is a partial side view of the stator of FIG. It is a partial side view of the stator of FIG. It is a partial cross section figure of a cover member and a division | segmentation core part. It is sectional drawing which shows the 1st modification of this embodiment. It is sectional drawing which shows the 2nd modification of this embodiment. It is a partial top view which shows the 3rd modification of this embodiment. FIG. 12 is a partial side view of the stator of FIG. 1 showing the positional relationship between the cover member of FIG. 11 and the split core portion. FIG. 13 is a partial cross-sectional view of the stator taken along line XIII-XIII in FIG. 12. It is a top view which shows the 4th modification of this embodiment. It is sectional drawing which shows the 5th modification of this embodiment. It is sectional drawing which shows the 6th modification of this embodiment. It is a top view which shows the 7th modification of this embodiment. 18A is a schematic cross-sectional view showing a state before the bundle of coil terminals is fixed by the holding member in FIG. 17, and FIG. 18B shows a state in which the bundle of coil terminals is fixed by the holding member in FIG. It is a schematic cross section. It is sectional drawing which shows the 8th modification of this embodiment. It is a top view which shows the 9th modification of this embodiment. It is sectional drawing which illustrated the state which fixed the bundle | flux of each coil terminal with the holding member of FIG.

  A preferred embodiment of the motor stator according to the present invention will be described below in detail with reference to FIGS.

[Schematic Configuration of Stator 10]
FIG. 1 is a plan view of a stator 10 (hereinafter also referred to as a stator 10 according to this embodiment) of 6-pole motor Y-type connection 6 parallel (Y-type connection fully parallel) according to this embodiment.

  The stator 10 that generates a rotating magnetic field (field) forms a motor in combination with a rotor (not shown) provided therein, and is used as, for example, a motor (electric motor) or a generator (generator) of an electric vehicle. As the electric vehicle, an electric vehicle using a power storage device such as a battery or a capacitor as a power source, a hybrid vehicle using the power storage device and an internal combustion engine as a power source or a drive source, or a fuel cell and the power storage device as a power source. The target is fuel cell vehicles and the like. The rotor may be a rotor having no permanent magnet, such as a permanent magnet rotor having a permanent magnet or a rotor rotating by reluctance torque.

  The stator 10 is a salient pole wound stator, and includes three-phase voltage supply terminals U, V, and W provided on a hollow holder 12, a neutral point terminal N that forms a neutral point, And a stator core 16 formed by annularly arranging a plurality (18 in FIG. 1 and FIG. 2) of divided core portions 14 along the inner peripheral surface 12a. The voltage supply terminals U, V, W and the neutral point terminal N are provided on the radially outer side of the stator core 16.

  The stator core 16 includes six divided core portions 14 each having U-phase, V-phase, and W-phase coils 18. In this case, in the stator core 16, the plurality of divided core portions 14 are arranged in a ring shape along the circumferential direction (arrow C direction) of the stator 10, so that the U phase (U1 phase to U6 phase), the V phase (V1 phase). To V6 phase) and W phase (W1 phase to W6 phase) coils 18 are arranged in the order of U1, V1, W1, U2,..., U6, V6, W6 in the clockwise direction of FIG. Be placed.

  In the stator 10, an annular cover member 20 is disposed in the gap between the radially outer side of the stator core 16 and the inner peripheral surface 12 a of the hollow holder 12. The cover member 20 is made of an electrically insulating material such as a flexible resin, and is, for example, press-fitted on the radially outer side of the stator core 16 or bonded to the radially outer side of the stator core 16 with an adhesive. As a result, the stator core 16 is fixed. Therefore, the stator core 16 and the cover member 20 can be disposed in the holder 12 by press-fitting the stator core 16 to which the cover member 20 is fixed, for example, inside the holder 12.

  The cover member 20 is formed with a protruding portion 22 that protrudes radially outward. In this case, the cover member 20 can be fixed to the holder 12 by fastening the screw hole (not shown) formed in the protrusion 22 and the screw hole (not shown) formed in the flange portion of the holder 12 with the bolt 24. it can.

  The cover member 20 can also be fixed to other parts other than the holder 12. Further, as described above, when the cover member 20 is press-fitted into the stator core 16 and the stator core 16 to which the cover member 20 is attached is press-fitted inside the holder 12, the protrusion 22 and the bolt 24 are not provided. Also good.

  FIG. 2 is a circuit diagram of the stator 10 having the above-described three-phase Y-connection fully parallel coil 18. Each coil 18 includes a coil winding portion 18B, a coil terminal 18x on one end side connected to the coil winding portion 18B, and a coil terminal 18y on the other end side.

  FIG. 3 is a substantial wiring diagram of the coil 18 corresponding to the plan view of FIG. 1 in which the V-phase and W-phase coils 18 are partially omitted and the U-phase coil 18 is drawn.

  2 and 3, the U-phase, V-phase, and W-phase coils 18 are all connected in parallel. The six coil terminals 18x of U1 phase to U6 phase are connected by a fusing process or the like and connected to the voltage supply terminal U, and the six coil terminals 18x of V1 phase to V6 phase are similarly connected to each other. Connected to the supply terminal V, the six coil terminals 18x of the W1 phase to W6 phase are similarly connected and connected to the voltage supply terminal W. Accordingly, each coil terminal 18x functions as a crossover for connecting the coil 18 to the voltage supply terminals U, V, and W.

  On the other hand, a total of 18 coil terminals 18y of the U phase, V phase, and W phase, that is, 6 coil terminals Nu of U phase, 6 coil terminals Nv of V phase, and 6 coils of W phase The coil terminal Nw is connected by a fusing process or the like and connected to the neutral point terminal N. Accordingly, each coil terminal 18 y functions as a jumper for connecting the coil 18 to the neutral point terminal N.

  In this way, a plurality of coil terminals 18x and 18y are bundled together, connected by a fusing process or the like, and connected to the voltage supply terminals U to W or the neutral point terminals N, thereby connecting portions 25n and 25u to 25w. Is formed. In the following description, for convenience of explanation, the coil terminals Nu, Nv, and Nw that are the coil terminals 18y may be referred to as N-phase coil terminals 18y (Nu, Nv, and Nw).

[Configuration of the split core unit 14]
Next, typically, the structure of one divided core portion 14 among the divided core portions 14 having the U-phase, V-phase, and W-phase coils 18 will be described with reference to FIGS. 4 and 5. . In addition, the structure of the split core part 14 demonstrated here is a structure common to the split core part 14 of all the phases.

  4 shows a perspective configuration of one split core portion 14 provided with the coil winding portion 18B, and FIG. 5 shows an exploded perspective configuration of the teeth 26 and the insulating member 28 of the split core portion 14. As shown in FIG.

  As shown in FIGS. 4 and 5, the split core portion 14 has substantially the same structure as the split core portion of the stator of Patent Document 1, and includes a plurality of substantially T-shaped metal plates 30 such as steel plates punched out by a press. A tooth 26 formed by laminating sheets, an insulating member 28 made of insulating member pieces 28a and 28b for electrically insulating the tooth 26, and a coil wire 18a wound around the tooth 26 via the insulating member 28 And a coil 18 configured. As shown in FIG. 8, the coil wire 18a is a rectangular wire having a rectangular cross section. The teeth 26 are arranged along the arrow B direction (the radial direction of the stator 10 and the stator core 16).

  As shown in FIGS. 4 and 5, the substantially T-shaped teeth 26 are arranged in the arrow C direction (circumferential direction of the stator 10 and the stator core 16) on the arrow B <b> 1 direction side (the radially outer side of the stator 10 and the stator core 16). The yoke portion 26a extends along the magnetic pole portion 26b extending from the yoke portion 26a toward the arrow B2 direction side (the radially inner side of the stator 10 and the stator core 16). Also, a substantially semicircular fitting recess 32 is formed at the end of the yoke portion 26a in the arrow C2 direction, and an approximately half corresponding to the fitting recess 32 is formed at the end of the yoke portion 26a in the arrow C1 direction. A circular fitting convex portion 34 is formed.

  The insulating member 28 is made of an electrically insulating material such as a flexible resin, and has a winding portion 38 around which the coil wire 18a is wound, and a routing portion 40 protruding from the winding portion 38 in the direction of the arrow B1. Have

  The winding portion 38 includes an upper winding portion 38a and a lower winding portion 38b that can be fitted in the direction of arrow A (vertical direction).

  The upper winding portion 38a is opposed to the winding portion main body 42a formed in a substantially U-shaped cross section, an inner peripheral wall 44a erected at the end of the winding portion main body 42a in the arrow B2 direction, and the inner peripheral wall 44a. Thus, it has the outer peripheral wall 46a standingly arranged in the edge part of the arrow B1 direction of the winding part main body 42a.

  The lower winding portion 38b includes a winding portion main body 42b having a substantially U-shaped cross section so as to face the winding portion main body 42a, and an arrow B2 of the winding portion main body 42b so as to face the inner peripheral wall 44a. Standing at the end in the direction, and at the end in the direction of the arrow B1 of the winding portion main body 42b so that the opposing portion is thinned by the thickness of the inner peripheral wall 44a and the inner peripheral wall 44b. And the opposing part has the outer peripheral wall 46b made thin by the thickness of the outer peripheral wall 46a.

  Accordingly, when the upper winding portion 38a and the lower winding portion 38b are fitted so as to sandwich the magnetic pole portion 26b of the tooth 26, the winding portion main body 42a, the winding portion main body 42b, the inner peripheral wall 44a, and the inner peripheral wall 44b. The outer peripheral wall 46a and the outer peripheral wall 46b are partially overlapped and joined. That is, by inserting the lower winding portion 38b from below the upper winding portion 38a, the upper winding portion 38a and the lower winding portion 38b are integrated to form the winding portion 38. A hole (not shown) is formed in the center of the winding portion 38 along the arrow B direction. Thereby, while the magnetic pole portion 26b is fitted into the hole, the coil wire 18a is wound around the portion of the winding portion 38 between the inner peripheral walls 44a and 44b and the outer peripheral walls 46a and 46b. A coil 18 is configured.

  The routing portion 40 is provided so as to protrude from the vicinity of the upper end portion of the outer peripheral wall 46a in the direction of the arrow B1, and the coil terminal 18x on one end side of the coil wire 18a is connected to the voltage supply terminals U, V, The coil terminal 18y on the other end side of the coil wire 18a is routed to the position of the neutral point terminal N along the arrow C direction.

  Specifically, the routing portion 40 includes a plate-like portion 50 provided at the upper end portion of the outer peripheral wall 46 a and a coil terminal housing portion 52 formed on the plate-like portion 50. The coil terminal accommodating part 52 is comprised so that the coil terminal 18x of the one end part side of the coil strand 18a wound by the winding part 38 and the coil terminal 18y of the other end part can be accommodated in the arrow C direction. ing.

  That is, as shown in FIGS. 4 to 8, the coil terminal accommodating portion 52 includes a block 52 a standing on the arrow C <b> 2 direction side of the plate-like portion 50 and a block standing on the arrow C <b> 1 direction side of the plate-like portion 50. 52b and the connection part 52c which connects the back surface of each block 52a, 52b of the arrow B2 direction. The coil terminals 18x and 18y (for example, the coil terminal 18y on the other end side) wound around the winding part 38 are fixed behind the block 52b (location on the arrow C1 direction side on the back surface in the direction of arrow B2). A coil terminal fixing portion 54 is formed.

  Each of the blocks 52a and 52b extends in the direction of the arrow C, and has a width (in the direction of the arrow A) that can accommodate the coil terminal 18y on the other end side of the flat wire 18a. Groove portions 56a and 56b having a length and a depth (depth along arrow B direction), and groove portions 58a to 62a and 58b to 62b having a width and a depth capable of accommodating the coil terminal 18x on one end side. Are provided at predetermined intervals in the direction of arrow A. Accordingly, each of the grooves 56a to 62a and 56b to 62b has openings 63a and 63b that open in the arrow B1 direction on the radially outer side of the stator 10, respectively.

  In this case, in each of the blocks 52a and 52b, the grooves 56a and 56b formed on the upper side in the direction of arrow A are the coils constituting the coils 18 of the U1 phase to U6 phase, the V1 phase to V6 phase, and the W1 phase to W6 phase. Since the coil terminal 18y on the other end side of the strand 18a is stacked and accommodated in the arrow B direction, as shown in FIG. 8, from the other grooves 58a to 62a and 58b to 62b that accommodate the coil terminal 18x. Is also formed deep in the direction of arrow B2.

  On the other hand, in each of the blocks 52a and 52b, the groove portions 58a to 62a and 58b to 62b formed at predetermined intervals below the groove portions 56a and 56b along the arrow A direction have substantially the same width (length) and It is formed to a depth (depth) (see FIGS. 6 to 8).

  Further, in the blocks 52a and 52b, the portions defining the groove portions 56a to 62a and 56b to 62b extend from the main body portions 64a and 64b of the blocks 52a and 52b in a flat plate shape in the arrow B1 direction and the arrow C direction, respectively. It is comprised as an existing bowl-shaped wall part, and each wall part is provided with inner wall part 66a-80a, 66b-80b.

  In general, the groove portion has an elongated hollow shape, and includes an elongated bottom surface portion, two inner wall portions each having one end side erected on both sides in the short direction of the bottom surface portion, and two of the inner wall portions. And an opening portion corresponding to the bottom surface portion formed by the other end side.

  And as shown in FIGS. 4-7, each inner wall part 66a-80a, 66b-80b faces each groove part 56a-62a, 56b-62b, and hold | maintains the circular arc shape extended in the arrow B direction. Concave portions 82a to 88a and 82b to 88b or convex portions 90a to 96a and 90b to 96b are formed as portions. The concave portions 82a to 88a, 82b to 88b and the convex portions 90a to 96a, 90b to 96b are provided at substantially the same positions along the arrow C direction in the inner wall portions 66a to 80a and 66b to 80b, respectively, and have substantially the same pulling amount. Or it has a protruding amount.

  That is, the concave portions 82a to 88a and 82b to 88b are provided in one inner wall portion facing the respective groove portions 56a to 62a and 56b to 62b, and the other inner wall portion is opposed to the concave portions 82a to 88a and 82b to 88b. Protrusions 90a to 96a and 90b to 96b are provided. Moreover, in the groove portions 56a to 62a of the block 52a and the groove portions 56b to 62b of the block 52b, the concave portions 82a to 88a and 82b to 88b and the convex portions 90a to 96a and 90b to 96b are alternately arranged along the arrow C direction. Is provided. Therefore, each groove part 56a-62a, 56b-62b is formed in the wave shape along the arrow C direction.

  Thus, the coil terminals 18y of the U1 phase to U6 phase, the V1 phase to V6 phase, and the W1 phase to W6 phase are stacked in the direction of arrow B with respect to the bottom portions 100a and 100b of the grooves 56a and 56b, and the arrow C Along the direction, it is routed to the position of the neutral point terminal N in a state of being accommodated in a wave shape in each of the grooves 56a and 56b. The coil terminals 18x of U1 phase to U6 phase are stacked in the direction of arrow B with respect to the bottoms 102a and 102b of the grooves 58a and 58b, and are waved in the grooves 58a and 58b along the direction of arrow C. In the accommodated state, it is routed to the position of the voltage supply terminal U.

  Similarly, the V1-phase to V6-phase coil terminals 18x are stacked in the direction of arrow B with respect to the bottoms 104a and 104b of the grooves 60a and 60b, and are waved in the grooves 60a and 60b along the direction of arrow C. In the state of being accommodated in the voltage supply terminal V, it is drawn to the position of the voltage supply terminal V. The coil terminals 18x of the W1 phase to W6 phase are stacked in the direction of arrow B with respect to the bottom portions 106a and 106b of the grooves 62a and 62b, and are waved in the grooves 62a and 62b along the direction of arrow C. In the accommodated state, it is routed to the position of the voltage supply terminal W.

[Configuration of Cover Member 20]
As shown in FIGS. 1, 6, and 8, the cover member 20 has openings in the groove portions 56 a to 62 a and 56 b to 62 b (with respect to the divided core portions 14 that are annularly arranged along the arrow C direction. It is an annular member attached to the side surface of the routing portion 40 in the direction of arrow B1 so as to close the portions 63a, 63b).

  In this case, the cover member 20 may be fixed to the stator core 16 by press-fitting into the side surface of each routing portion 40 in the direction of arrow B1, or the direction of the routing portion 40 in the direction of arrow B1 through an adhesive (not shown). You may fix to the stator core 16 by adhere | attaching on the side surface. Accordingly, the cover member 20 is fixed in a gap between the inner peripheral surface 12a of the holder 12 and the outer peripheral surface of the stator core 16 (the side surface in the direction of arrow B1 of the routing portion 40) by press-fitting the stator core 16 inside the holder 12. Retained.

  Moreover, as shown in FIG. 7, among the cover member 20, the location where the voltage supply terminals U to W and the neutral point terminal N are provided (the locations where the connection portions 25n and 25u to 25w are provided) is the connection portion 25n, A part of the cover member 20 is formed as a cutout part 110 cut out in a rectangular shape so as to avoid 25u to 25w. Accordingly, the voltage supply terminals U to W and the neutral point terminal N pass through the notch 110 and project from the holder 12 and the cover member 20 to the outside in the radial direction of the stator 10 as shown in FIG. Can do.

  In addition, since the coil terminals 18x and 18y are accommodated in the grooves 56a to 62a and 56b to 62b, the cover member 20 includes the coil terminals 18x and 18y in the grooves 56a to 62a and 56b to 62b, and Immediately after being routed to the positions of the connecting portions 25n and 25u to 25w, it is desirable to attach to the side surface of the routing portion 40 in the arrow B1 direction.

[Routing of each coil terminal 18x, 18y]
Here, prior to the description of the action of the cover member 20, the housing (drawing) of the coil terminals 18x and 18y with respect to the grooves 56a to 62a and 56b to 62b and the formation of the connection parts 25n and 25u to 25w will be described.

  As described above, the coil terminal 18x on one end side and the coil terminal 18y on the other end side of the coil wire 18a are arranged with the long side of the rectangular wire along the arrow A direction (FIGS. 4 and 6). -See Fig. 8), and is accommodated in each of the grooves 56a to 62a and 56b to 62b by being routed in the direction of arrow C. Therefore, about each groove part 56a-62a and each groove part 56b-62b of each division | segmentation core part 14, the coil terminal 18x of which phase is routed around among each coil terminal 18x of U phase, V phase, and W phase, Furthermore, It is desirable to assign in advance whether the U-phase to W-phase coil terminals 18y are routed.

  For example, U1 phase to U6 phase, V1 to V6 phase and W1 to W6 phase coil terminals 18y are routed to each groove 56a, 56b, and U1 phase to U6 phase coil terminals 18x are routed to each groove 58a, 58b. It is determined in advance that the V1 phase to V6 phase coil terminals 18x are routed around the groove portions 60a and 60b, and the W1 phase to W6 phase coil terminals 18x are routed around the groove portions 62a and 62b.

  Further, it is also determined in advance that the voltage supply terminals U, V, W and the neutral point terminal N are provided in the vicinity of the three divided core portions 14 of the U1 phase, the W6 phase and the V6 phase.

  Further, in the stator core 16, 18 divided core portions 14 are annularly arranged in the order shown in FIG.

  Therefore, first, the three coil terminals 18x of the U1 phase to the U3 phase are accommodated in the grooves 58a and 58b of the split core portion 14 from the U3 phase to the U1 phase, and are shown in FIG. It is routed clockwise to the position of the voltage supply terminal U. At that time, in each of the groove portions 58a and 58b, the three coil terminals 18x are routed in a state where they are stacked in the arrow B direction toward the position of the voltage supply terminal U. That is, since the position of the voltage supply terminal U is separated in the order of the U1 phase, the U2 phase, and the U3 phase, the U1 phase is separated from the bottom portions 102a and 102b (see FIG. 8) in the respective groove portions 58a and 58b. The coil terminals 18x of the phase, the U2 phase, and the U3 phase are stacked and routed in this order.

  On the other hand, the three coil terminals 18x of the U4 phase to the U6 phase are accommodated in the grooves 58a and 58b of the split core portion 14 from the U4 phase to the U1 phase, and clockwise in FIG. 1 along the arrow C2 direction. Then, it is routed to the position of the voltage supply terminal U. At that time, in each of the groove portions 58a and 58b, the three coil terminals 18x are routed in a state where they are stacked in the arrow B direction toward the position of the voltage supply terminal U. That is, since the position of the voltage supply terminal U is separated in the order of the U6 phase, the U5 phase, and the U4 phase, the U6 phase is separated from the bottom portions 102a and 102b (see FIG. 8) in the respective groove portions 58a and 58b. Phase, U5 phase, and U4 phase coil terminals 18x are stacked and routed in this order.

  As a result, the coil terminal 18x of each coil wire 18a constituting the U1 phase to U6 phase coil 18 can be connected to the voltage supply terminal U. In this case, at the location of the voltage supply terminal U, the ends of the three coil terminals 18x of the U1 phase to the U3 phase are curved in a V shape outwardly in the radial direction of the stator 10 (in the direction of the arrow B1) and opposed to U4. The ends of the three coil terminals 18x of the phases U6 to U6 are bent in a V shape in the direction of arrow B1. By performing a fusing process or the like on the ends of the bundled six coil terminals 18x, the six coil terminals 18x are connected and connected to the voltage supply terminal U to form a connection part 25u.

  Similarly, the three coil terminals 18x of the V1 phase to the V3 phase are accommodated in the grooves 60a and 60b of the split core portion 14 from the V3 phase to the W6 phase, and are shown in FIG. It is routed clockwise to the position of the voltage supply terminal V. At that time, in each of the groove portions 60a and 60b, the three coil terminals 18x are routed in a state where they are stacked in the arrow B direction toward the position of the voltage supply terminal V. That is, since the position of the voltage supply terminal V is separated in the order of the V1 phase, the V2 phase, and the V3 phase, in the respective groove portions 60a and 60b, the V1 with respect to the bottom portions 104a and 104b (see FIG. 8) The coil terminals 18x of the phase, the V2 phase, and the V3 phase are stacked in order and routed.

  On the other hand, the three coil terminals 18x of the V4 phase to the V6 phase are accommodated in the respective groove portions 60a and 60b of the split core portion 14 from the V4 phase to the W6 phase, and clockwise in FIG. 1 along the arrow C2 direction. Then, it is routed to the position of the voltage supply terminal V. At that time, in each of the groove portions 60a and 60b, the three coil terminals 18x are routed in a state where they are stacked in the arrow B direction toward the position of the voltage supply terminal V. That is, since the V6 phase, the V5 phase, and the V4 phase are separated in this order with respect to the position of the voltage supply terminal V, in the groove portions 60a and 60b, the bottom portions 104a and 104b (see FIG. 8) The coil terminals 18x of the phase, the V5 phase, and the V4 phase are stacked in order and routed.

  As a result, the coil terminal 18x of each coil wire 18a constituting the V1-phase to V6-phase coil 18 can be connected to the voltage supply terminal V. Also in this case, at the location of the voltage supply terminal V, the ends of the three coil terminals 18x of the V1 phase to V3 phase are curved in a V shape in the direction of the arrow B1, and three of the opposing V4 phase to V6 phase are provided. The end of the coil terminal 18x is bent in a V shape in the direction of arrow B1. By performing a fusing process or the like on the ends of the bundled six coil terminals 18x, the six coil terminals 18x are connected and connected to the voltage supply terminal V to form a connection part 25v.

  Further, the three coil terminals 18x of the W6 phase, the W1 phase, and the W2 phase are accommodated in the grooves 62a and 62b of the split core portion 14 from the W2 phase to the W6 phase, and are directed in the direction of the arrow C1 in FIG. It is routed counterclockwise to the position of the voltage supply terminal W. At that time, in each of the grooves 62a and 62b, the three coil terminals 18x are routed in a state of being stacked in the direction of the arrow B toward the position of the voltage supply terminal W. That is, since the position of the voltage supply terminal W is separated in the order of the W6 phase, the W1 phase, and the W2 phase, in the groove portions 62a and 62b, the bottom portions 106a and 106b (see FIG. 8) The coil terminals 18x of the phase, the W1 phase, and the W2 phase are stacked and routed in this order.

  On the other hand, the three coil terminals 18x of the W3 phase to the W5 phase are accommodated in the grooves 62a and 62b of the split core portion 14 from the W3 phase to the W6 phase, and rotate clockwise in FIG. 1 in the direction of the arrow C2. Then, it is routed to the position of the voltage supply terminal W. At that time, in each of the grooves 62a and 62b, the three coil terminals 18x are routed in a state of being stacked in the direction of the arrow B toward the position of the voltage supply terminal W. That is, since the position of the voltage supply terminal W is separated in the order of the W5 phase, the W4 phase, and the W3 phase, in each of the groove portions 62a and 62b, the bottom portions 106a and 106b (see FIG. 8) Phase, W4 phase, and W3 phase coil terminals 18x are stacked in order and routed.

  As a result, the coil terminal 18x of each coil wire 18a constituting the W1 phase to W6 phase coil 18 can be connected to the voltage supply terminal W. Also in this case, at the location of the voltage supply terminal W, the ends of the three coil terminals 18x of the W6 phase, the W1 phase and the W2 phase are curved in a V shape in the direction of the arrow B1, and the opposing W3 to W5 phases The ends of the three coil terminals 18x are bent in a V shape in the direction of the arrow B1. By performing a fusing process or the like on the ends of the bundled six coil terminals 18x, the six coil terminals 18x are connected and connected to the voltage supply terminal W to form a connection part 25w.

  Furthermore, the nine coil terminals 18y of the W6 phase to the V3 phase on the left side of FIG. 1 are accommodated in the grooves 56a and 56b of the split core portion 14 from the W6 phase to the V3 phase, and toward the arrow C1 direction, 1 is routed counterclockwise to the position of the neutral point terminal N. At that time, in each of the groove portions 56a and 56b, the nine coil terminals 18y are routed in a state where they are stacked in the direction of the arrow B toward the position of the neutral point terminal N. That is, since the position of the neutral point terminal N is separated in the order of the W6 phase, the U1 phase,..., The U3 phase and the V3 phase, the bottom portions 100a and 100b (see FIG. 8) in the respective groove portions 56a and 56b. ), The coil terminals 18y of the W6 phase, the U1 phase,..., The U3 phase, and the V3 phase are stacked and routed in this order.

  On the other hand, the nine coil terminals 18y from the V6 phase to the W3 phase on the right side of FIG. 1 are accommodated in the grooves 56a and 56b of the split core portion 14 from the V6 phase to the W3 phase, and are directed toward the arrow C2 direction. 1 is routed clockwise to the position of the neutral point terminal N. At that time, in each of the groove portions 56a and 56b, the nine coil terminals 18y are routed in a state where they are stacked in the direction of the arrow B toward the position of the neutral point terminal N. That is, since the position of the neutral point terminal N is separated in the order of the V6 phase, the U6 phase,..., The U4 phase, and the W3 phase, the bottom portions 100a, 100b (see FIG. 8) in the respective groove portions 56a, 56b. ), The V6 phase, the U6 phase,..., The U4 phase, and the W3 phase coil terminals 18y are stacked and routed in this order.

  As a result, the coil terminal 18y of each coil wire 18a constituting the V6 phase to W3 phase coil 18 can be connected to the neutral point terminal N. Also in this case, at the position of the neutral point terminal N, the end portions of the nine coil terminals 18y of the W6 phase to the V3 phase are curved in a V shape in the direction of the arrow B1, and the opposing V6 phase to W3 phase of 9 The ends of the coil terminals 18y are bent in a V shape in the direction of the arrow B1. By performing a fusing process or the like on the ends of the 18 coil terminals 18y that are bundled, the 18 coil terminals 18y are connected and connected to the neutral point terminal N, thereby forming a connection part 25n. .

  In addition, when accommodating each coil terminal 18x, 18y in each groove part 56a-62a, 56a-62a, respectively, each coil terminal 18x, 18y is recessed part 82a-88a, 82b-88b, and convex part 90a-96a, 90b-96b. Each deforms along (turns). As a result, after drawing, the deformed portions bent by the concave portions 82a to 88a and 82b to 88b and the convex portions 90a to 96a and 90b to 96b try to return to the convex portions 90a to 96a and 90b to 96b side by the springback effect. Reaction force to act. By this reaction force, the deformed portion is pressed against the convex portions 90a to 96a and 90b to 96b. As a result, the coil terminals 18x and 18y are respectively housed in the grooves 56a to 62a and 56b to 62b in a wavy shape while being securely held by the convex portions 90a to 96a and 90b to 96b.

[Operation of cover member 20]
Next, the operation of the cover member 20 will be described. The action of the cover member 20 means that the coil terminals 18x and 18y as connecting wires housed in the grooves 56a to 62a and 56b to 62b as described above are radially outward (arrow B1) due to various factors described later. It is to suppress (protect) so that it does not go in the direction). The cover member 20 is attached to the side surface of the routing portion 40 in the direction of the arrow B1 immediately after the routing process of the coil terminals 18x and 18y.

  Here, prior to the action of the cover member 20, a problem due to the absence of the cover member 20 will be described.

  The stator core 16 is formed in a cylindrical shape by arranging the divided core portions 14 in an annular shape. Therefore, when the stator core 16 is press-fitted into the holder 12, each divided core portion 14 is moved radially inward (arrow B <b> 2 direction), and the stator core 16 is generally contracted radially inward. As a result, the outer diameter of the stator core 16 is reduced, and the coil terminals 18x and 18y accommodated in the grooves 56a to 62a and 56b to 62b are loosened radially outward.

  Further, when forming the connection portions 25u to 25w by connecting the coil terminals 18x having the same phase, for example, after the ends of the coil terminals 18x having the same phase are bundled, the voltage is supplied to each end for each phase. Connection portions 25u to 25w are formed by joining terminals U, V, and W by a fusing process. Also for each coil terminal 18y, after the end portions of the coil terminal 18y are bundled, the connection portions 25n are formed by joining the end portions and the neutral point terminal N by a fusing process. Therefore, when the contact operation between the coil terminals 18x and 18y is repeated in the process of bundling the coil terminals 18x and 18y and performing the fusing process, the coil terminals 18x accommodated in the grooves 56a to 62a and 56b to 62b, 18y may be loosened. Further, by repeating the above contact operation, an extra load is applied to the insulating coating of each of the coil terminals 18x and 18y, which may affect the electrical insulation performance of the coil 18.

  Further, when the voltage supply terminals U, V, W and the neutral point terminal N are connected to the terminals of the cables of each phase, if the terminal positions are finely adjusted, the root portions of the end portions of the coil terminals 18x, 18y Will move. As a result, the holding force of the grooves 56a to 62a and 56b to 62b with respect to the coil terminals 18x and 18y is reduced, and the coil terminals 18x and 18y may loosen radially outward.

  As described above, if some of the coil terminals 18x and 18y are loosened to the outside and exposed from the groove portions 56a to 62a and 56b to 62b, the electrical insulation performance of the coil terminals 18x and 18y may be affected. In this case, it is necessary to redo all the steps of drawing the coil terminals 18x and 18y in the circumferential direction and accommodating them in the grooves 56a to 62a and 56b to 62b, respectively, and to rewind the coils 18 of all the divided core portions 14. For this reason, the yield of the stator 10 may decrease and the manufacturing cost may increase.

  Therefore, in the stator 10 according to this embodiment, in order to solve the above-described problem, by covering the side surface in the direction of the arrow B1 in the routing portion 40 of the insulating member 28 constituting each divided core portion 14 with the cover member 20, The openings 63a and 63b of the grooves 56a to 62a and 56b to 62b are closed. In addition, the cover member 20 is press-fitted into the side surface of each routing portion 40 in the direction of the arrow B1, or is bonded and fixed to the side surface via an adhesive.

  As a result, when the stator core 16 to which the cover member 20 is attached is press-fitted inside the holder 12, the stator core 16 contracts radially inward (in the direction of arrow B2), or the voltage supply terminals U, V, W, and Even when the base portion of the end of each coil terminal 18x, 18y moves by finely adjusting the terminal position when connecting the sex point terminal N and the terminal of the cable of each phase, each opening 63a, 63b Is closed by the cover member 20, it is possible to prevent the coil terminals 18x, 18y from exiting radially outward (in the direction of the arrow B1) from the grooves 56a-62a, 56b-62b.

[Effects of this embodiment]
As described above, according to the stator 10 according to this embodiment, the groove portions 56 a to 62 a and 56 b to 62 b that accommodate the coil terminals 18 x and 18 y are closed by the cover member 20. Therefore, when the stator 10 is manufactured, the coil terminals 18x and 18y are routed along the direction of the arrow C to be accommodated in the grooves 56a to 62a and 56b to 62b, and then each divided core portion 14 (cylindrical shape) disposed in an annular shape. When the stator core 16) is press-fitted inside the holder 12, the coil terminals 18x and 18y can be prevented from coming out radially outward (arrow B1 direction) of the groove portions 56a to 62a and 56b to 62b. .

  Thus, the assembly process of the stator 10 after accommodating each coil terminal 18x, 18y in each groove part 56a-62a, 56b-62b (for example, connection between coil terminal 18x, 18y, the stator core 16 to the inner side of the holder 12) In the press-fitting), the coil terminals 18x and 18y can be prevented from coming out radially outward of the grooves 56a to 62a and 56b to 62b, so that the yield of the stator 10 is reduced and the manufacturing cost of the stator 10 is increased. Can be suppressed together.

  That is, in this embodiment, even if there is looseness in holding the coil terminals 18x and 18y in the grooves 56a to 62a and 56b to 62b, as long as the cover member 20 is present, interference with external parts or Further, it is possible to prevent a decrease in electrical insulation performance (occurrence of defective insulation) due to friction between the coil terminals 18x and 18y. Further, by attaching the cover member 20 to the stator core 16 immediately after the drawing process of the coil terminals 18x and 18y as connecting wires, it is possible to eliminate the cause of the loosening of the coil terminals 18x and 18y in the assembly process of the stator 10. . As a result, the influence of the looseness of the coil terminals 18x and 18y can be minimized and the productivity of the stator 10 can be improved.

  In this embodiment, openings 63a and 63b are formed in the grooves 56a to 62a and 56b to 62b, respectively, toward the radially outer side of the stator 10. Therefore, if the cover member 20 is formed in an annular shape and is fixed to the routing portion 40 of each divided core portion 14 outside the openings 63a and 63b, the cover member 20 can be easily fixed to the routing portion 40. it can. Note that the cover member 20 can be more easily fixed by press-fitting the cover member 20 into the routing portion 40 outside the openings 63a and 63b in the radial direction.

  Furthermore, if the notch part 110 is provided in the position corresponding to each connection part 25n of the cover member 20, 25u-25w, interference with each connection part 25n, 25u-25w and the cover member 20 can be suppressed.

  In addition, as a conventional stator, for example, as disclosed in Japanese Patent Application Laid-Open No. 2012-228153, after forming a coil terminal itself as a crossover into a wave shape, the coil terminal after forming is formed in each groove portion of the routing portion. In some cases. In this prior art, a device for forming the coil terminal into a wave shape is required, which is costly and requires a space for installing the device. Further, if an extra load is applied to the insulating coating of the coil terminal during the molding of the coil terminal, the electrical insulation performance of the coil may be affected. Furthermore, in order to accurately shape the coil terminal into a wavy shape and store it in the groove, it is necessary to strictly control the dimensions of the coil terminal, and to manage the coil terminal accurately (the tension applied to the coil terminal). , The pitch of the waves, the speed for routing to each groove, etc.) may increase and productivity may not be simple.

  As another conventional stator, as disclosed in JP 2012-16100 A, there is a case in which a protrusion is provided on the radially outer side of the inner wall portion constituting the groove portion of the routing portion to hold the coil terminal. is there. However, if the shape of the protrusion is smaller than the width of the coil terminal, it is necessary to apply a large insertion force to the coil terminal when the coil terminal is inserted into the groove, and the side surface of the coil terminal is damaged during the insertion. there is a possibility. Such scratches may affect the electrical insulation performance of the coil. Therefore, in order to avoid such a situation, when a coil wire with a thick insulating film is used, the space factor is lowered, and the performance of the motor including the stator is lowered, and the cost and weight of the stator are expected to be increased. The

  On the other hand, in the stator 10 according to this embodiment, as described above, the coil terminals 18x and 18y are formed from the grooves 56a to 62a and 56b to 62b only by attaching the cover member 20 to the radially outer side of the stator core 16. You can stop going out. Accordingly, the manufacturing cost of the stator 10 can be kept low, the electrical insulation performance of the coil wire 18a can be ensured, and the performance degradation of the stator 10 can be avoided.

  In the above description, each of the grooves 56a to 62a and 56b to 62b is formed along the arrow B direction, and the openings 63a and 63b are provided in the arrow B1 direction. This embodiment is not limited to the above description. For example, openings 63a and 63b are formed in an arbitrary direction, and are accommodated in the grooves 56a to 62a and 56b to 62b in the assembly process of the stator 10. Even when the coil terminals 18x and 18y are likely to be loosened and exposed to the outside, the respective effects described above can be obtained by closing the openings 63a and 63b with the cover member 20.

  In the above description, the three-phase stator 10 has been described. However, for example, this embodiment can be applied to a stator of a six-phase motor.

[Modification of this embodiment]
The present invention is not limited to the above-described embodiment, and it is naturally possible to adopt various configurations without departing from the gist of the present invention.

  Here, modified examples (first to ninth modified examples) of the stator 10 according to this embodiment will be described with reference to FIGS. 9 to 21. In the following description, the same components as those described in FIGS. 1 to 8 are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the first modified example, as shown in FIG. 9, the cover member 20 is formed in a substantially L-shaped cross section, and therefore, the upper end portion of the cover member 20 is provided with an abutting portion 120 extending in the arrow B2 direction. It has been. Thus, when the cover member 20 is press-fitted into the side surface in the direction of the arrow B1 in the routing portion 40 of each divided core portion 14, if the abutting portion 120 comes into contact with the upper surface of the routing portion 40, the routing portion 40 is formed. All the openings 63a and 63b can be easily closed. In the first modification, instead of press-fitting, the cover member 20 may be bonded and fixed to the routing portion 40 with an adhesive (not shown).

  In the second modified example, as shown in FIG. 10, the plate-like portion 50 protrudes from the side surface of the routing portion 40 in the arrow B1 direction. In this case, when the cover member 20 is press-fitted into the side surface of the routing portion 40 in the direction of the arrow B1, the lower end portion of the cover member 20 abuts against the plate-like portion 50, so that all the openings 63a and 63b formed in the routing portion 40. Can be easily blocked. In the second modification, instead of press-fitting, the cover member 20 may be bonded and fixed to the routing portion 40 with an adhesive (not shown).

  In the third modified example, as shown in FIGS. 11 to 13, a phase determining portion 122 extending in the direction of the arrow B <b> 2 is provided at a location facing the connecting portion 52 c in the upper end portion of the cover member 20. In this case, as shown in FIG. 12, the upper end portion of the cover member 20 is set at a position lower than the upper surface of the routing portion 40 so as to cover the groove portions 56a and 56b.

  Therefore, the phase determining portion 122 protrudes upward from the upper end portion of the cover member 20, and the arrow B2 toward the connecting portion 52c so as to fit between the upper end portion of the block 52a and the upper end portion of the block 52b. Extends in the direction. Further, as shown in FIG. 13, the distal end side of the bottom surface of the phase determining portion 122 is a coil terminal on the radially outer side among the coil terminals 18y accommodated in the grooves 56a and 56b and drawn in the direction of the arrow C. It is in contact with the upper surface of 18y.

  Therefore, when the cover member 20 is press-fitted into the side surface of the routing portion 40 in the direction of the arrow B1, the phase determining portion 122 is fitted between the blocks 52a and 52b, and the bottom surface of the phase determining portion 122 is the radially outer coil terminal 18y. It hits the top surface of. As described above, the phase determining portion 122 is fitted between the blocks 52 a and 52 b, so that the cover member 20 is press-fitted into the stator core 16 while being positioned with a predetermined phase with respect to the stator core 16. Further, the phase determining portion 122 abuts against the upper surface of the coil terminal 18y, so that loosening of the coil terminals 18y accommodated in the grooves 56a and 56b can be effectively suppressed.

  In the third modification, the cover member 20 may be bonded and fixed to the routing portion 40 and the radially outer coil terminal 18y with an adhesive (not shown).

  In the fourth modified example, as shown in FIG. 14, portions of the cover member 20 corresponding to the connection portions 25n and 25u to 25w are cut out, so that the cover member 20 is a substantially arc-shaped member (see FIG. 14). 14 as a substantially C-shaped belt-like member in plan view.

  Further, as described above, the cover member 20 is made of an electrically insulating material such as a flexible resin. Therefore, when attaching the cover member 20 to the outer side in the radial direction of the stator core 16, each lead-out portion is opened in a state where the C-shaped cover member 20 is opened to some extent and the opening portion is aligned with the connection portions 25n and 25u to 25w. The cover member 20 is attached to the outer side in the radial direction of 40. Therefore, the arc-shaped portion of the cover member 20 closes the portions other than the connection portions 25n and 25u to 25w in the openings 63a and 63b.

  Even in this case, the cover member 20 can be easily attached to the routing portion 40 without causing interference between the cover member 20 and the connection portions 25n and 25u to 25w.

  As described above, the cover member 20 of the fourth modified example is formed in a C shape in the plan view of FIG. 14 and cannot be fixed to the radially outer side of the stator core 16 by press-fitting. Therefore, in the fourth modification, the cover member 20 is attached to each routing portion 40 by bonding the cover member 20 to the side surface in the arrow B1 direction of each routing portion 40 using an adhesive (not shown).

  Moreover, the cover member 20 of a 4th modification is shown in FIG.1, FIG.6, FIG.7 and FIG. 8 except the point that a part of cover member 20 is notched corresponding to the connection parts 25n and 25u-25w. Since the cover member 20 has the same structure, it is needless to say that the effects of these structures can be easily obtained.

  In the fifth modified example, similarly to the fourth modified example, the cover member 20 is C-shaped in plan view, and each of the cover members 20 formed on the side surface in the arrow B2 direction as shown in FIG. The protrusions 124a to 130a and 124b to 130b are fitted into the grooves 56a to 62a and 56b to 62b. Thereby, the opening parts 63a and 63b of each groove part 56a-62a, 56b-62b can be obstruct | occluded reliably. In the fifth modified example, the cover member 20 may be bonded to the side surface of each routing portion 40 in the direction of the arrow B1 with an adhesive (not shown).

  In the sixth modification, as shown in FIG. 16, among the side surfaces of the routing portion 40 in the arrow B1 direction, the upper end portion of the routing portion 40 projects in the arrow B1 direction, while the plate is the lower end portion of the routing portion 40. The shaped part 50 is retracted in the direction of the arrow B2. Corresponding to the shape of the routing part 40, the cover member 20 is formed in a substantially L-shaped cross section. That is, the upper end portion of the cover member 20 abuts against the bottom surface of the upper end portion of the routing portion 40, while the lower end portion of the cover member 20 extends in the arrow B2 direction and abuts against the plate-like portion 50. It is formed as.

  Thereby, in the sixth modification, when the cover member 20 is bonded and fixed to the side surface in the direction of arrow B1 of the routing portion 40 using an adhesive (not shown), the upper end portion of the cover member 20 is in the direction of arrow B1 in the routing portion 40. The butted portion 132 strikes the bottom surface of the protruding upper end portion and the abutting portion 132 strikes the plate-like portion 50. Thereby, the opening parts 63a and 63b of each groove part 56a-62a, 56b-62b can be obstruct | occluded efficiently.

  Further, when the abutting portion 132 abuts against the plate-like portion 50, the bottom surface of the coil terminal 18 x routed around each of the groove portions 62 a and 62 b also abuts against the upper surface of the abutting portion 132. As a result, loosening of each coil terminal 18x accommodated in each groove 62a, 62b can be effectively suppressed.

  Note that the sixth modification example is not limited to the example of FIG. 16, and can be applied to the cross-sectional shape of the third modification example of FIG. It is. That is, in the sixth modification, the coil terminal 18x can be abutted and pressed from below, or the coil terminal 18y can be abutted and pressed from above.

  In the seventh modification, as shown in FIG. 17, the cover member 20 is not provided, but instead, the ends of the coil terminals 18 x of the bundled U phase, V phase, and W phase, The ends of the coil terminals 18y thus formed are held together by a substantially arc-shaped holding member 134. In the seventh modification, the voltage supply terminals U, V, and W are illustrated as bus bars, but the terminal shapes illustrated in FIGS. 1 and 14 may be used.

  And the holding member 134 collectively holds the location between the root portions of the ends of the coil terminals 18x and 18y in a bundle and the voltage supply terminals U, V, and W and the neutral point terminal N of the bus bar. It is a resin member. That is, the holding member 134 is integrally held so that the end portions of the coil terminals 18x of the bundled U phase, V phase, and W phase and the end portions of the bundled coil terminals 18y do not move. It functions as a binding band.

  Accordingly, the holding member 134 is provided with the coil terminals immediately after the coil terminals 18x and 18y are routed and the ends are bundled, or immediately after the connection portions 25w, 25v, 25u, and 25n are provided. It is desirable to hold the ends of 18x and 18y together.

  Specifically, as shown schematically in FIGS. 18A and 18B, the holding member 134 is a recess in which the ends of the bundled U-phase, V-phase, and W-phase coil terminals 18 x are respectively placed. 136u to 136w and a mounting portion 138 formed with a recess 136n on which an end of each bundled coil terminal 18y is mounted, and extends from the base end portion 140 of the mounting portion 138 on the recess 136w side. And a pressing portion 142 that rotates with respect to the mounting portion 138 about the base end portion 140 as an axis. 18A and 18B, the six coil terminals 18x are bundled for the U phase, the V phase, and the W phase, respectively, while the 18 coil terminals 18y are bundled for the N phase. Is thinner than the coil terminal 18x.

  Each recess 136n, 136u to 136w is formed in a tapered shape as shown in FIG. 18A. In addition, an extending portion 144 that extends upward is provided at the tip of the placement portion 138. The extension portion 144 has an engagement hole 148 that engages with a projecting engagement portion 146 provided at the distal end portion of the pressing portion 142 when the pressing portion 142 rotates about the base end portion 140. Is formed.

  Here, as shown in FIG. 18A, the ends of the coil terminals 18y bundled in the recess 136n with the pressing portion 142 opened with respect to the mounting portion 138 are placed, and the recesses 136u to 136w are placed. The end portions of the coil terminals 18x that are bundled are placed on each other. In this state, when the pressing portion 142 is rotated toward the mounting portion 138 with the base end portion 140 as an axis, the engaging portion 146 engages with the engaging hole 148 as shown in FIG. 18B. Thereby, the edge part of each coil terminal 18x and 18y mounted in each recessed part 136n, 136u-136w is hold | maintained integrally in the state which received the pressing force from the press part 142. FIG.

  In addition, each of the recesses 136n, 136u to 136w is formed in a tapered shape. Further, the end portions of the coil terminals 18x and 18y that are bundled are configured in a substantially block shape in cross section, and the corner portions of the blocks can contact the inclined surfaces of the recesses 136n and 136u to 136w, respectively. Thereby, when the engaging part 146 and the engaging hole 148 are engaged, a compressive force acts on the ends of the coil terminals 18x and 18y that are bundled. As a result, it is easy to regulate the positions of the coil terminals 18x and 18y.

  That is, the end portions of the coil terminals 18x and 18y are collectively held by the holding member 134, and the position is regulated. Therefore, even if at least one bundle is pulled among the ends of the coil terminals 18x and 18y that are bundled, the ends of the coil terminals 18x and 18y of all the bundles including the bundle are moved. Can be suppressed.

  As described above, in the seventh modified example, when the stator 10 is manufactured, the coil terminals 18x and 18y are routed along the arrow C direction and accommodated in the grooves 56a to 62a and 56b to 62b. The ends of the coil terminals 18x and 18y that form a bundle constituting 25u to 25w are held together by the holding member 134. Thus, even if a bundle of arbitrary coil terminals 18x and 18y is pulled radially outward (in the direction of arrow B1) of the stator core 16, the bundle of coil terminals 18x and 18y of other phases is positioned by the holding member 134. Since it is fixed and the relative position is restricted, the movement of the bundle of the arbitrary coil terminals 18x and 18y can be restricted.

  As a result, even if the bundles of the coil terminals 18x and 18y are simultaneously pulled outward in the radial direction, the bundles of the coil terminals 18x and 18y are moved because the bundles are positioned in the arrow C direction by the holding member 134. Can be regulated. That is, in the seventh modification, the ends of the coil terminals 18x and 18y that are bundled are held between the U phase, the V phase, the W phase, and the N phase, so that the coil terminals 18x and 18y are loosened. Toughness can be improved.

  In addition, compared to the case where the ends of the coil terminals 18x and 18y that are bundled are individually regulated (for example, the position of the root portion of each coil terminal 18x and 18y that is bundled is regulated), The seventh modification can reliably and efficiently position the ends of the coil terminals 18x and 18y of all the bundles.

  As described above, by restricting the movement of the portions where the coil terminals 18x and 18y are bundled in the connection portions 25n and 25u to 25w by the holding member 134, the respective portions accommodated in the grooves 56a to 62a and 56b to 62b are accommodated. The movement of the coil terminals 18x and 18y to the outside in the radial direction is also restricted. As a result, in the assembly process of the stator 10 after the coil terminals 18x and 18y are accommodated in the grooves 56a to 62a and 56b to 62b, the coil terminals 18x and 18y are arranged in the radial direction of the grooves 56a to 62a and 56b to 62b. It can suppress going out. Therefore, also in the seventh modified example, it is possible to suppress both a decrease in the yield of the stator 10 and an increase in the manufacturing cost of the stator 10.

  Note that the seventh modification is not limited to the example in FIG. 17, and the holding member 134 may hold the ends of the coil terminals 18 x and 18 y in an arbitrary order. Further, the seventh modification is not limited to the three-phase stator 10 shown in FIG. 17 and can be applied to a stator of a six-phase motor, for example.

  In the eighth modified example, as shown in FIG. 19, the pressing portion 142 is provided with concave portions 136n, 136u to 136w having a rectangular cross section, while the mounting portion 138 is formed in a flat plate shape. Therefore, in the eighth modification, the coil terminals 18x, 18y are inserted into the recesses 136n, 136u to 136w by sandwiching the ends of the coil terminals 18x, 18y in a bundle between the pressing part 142 and the mounting part 138, respectively. Each of the ends. Moreover, in the eighth modification, the end portions of the coil terminals 18x and 18y are held together by fastening the pressing portion 142 and the mounting portion 138 with the two bolts 150a and 150b. Thus, since the ends of the coil terminals 18x and 18y are held together in the eighth modification, the same effect as in the seventh modification can be obtained.

  In the eighth modification, instead of fastening the pressing portion 142 and the mounting portion 138 with the two bolts 150a and 150b, the pressing portion 142 and the mounting portion 138 may be bonded with an adhesive (not shown). Alternatively, the pressing portion 142 and the mounting portion 138 may be caulked, or the pressing portion 142 and the mounting portion 138 may be fixed by a fitting and killing method. In any case, since the end portions of the coil terminals 18x and 18y in a bundle can be held together, the above effect can be easily obtained.

  As shown in FIGS. 20 and 21, in the ninth modification, the cover member 20 is attached to the outer side in the radial direction of the stator core 16, and the ends of the coil terminals 18 x and 18 y that are bundled are bundled by the holding member 134. Is held.

  In this case, similarly to the fourth modified example (see FIG. 14), the portions of the connection portions 25n and 25u to 25w in the cover member 20 are notched, so that the cover member 20 is circular in plan view of FIG. It is formed in an arc shape (substantially C shape). Further, extending portions 152 a and 152 b extending outward in the radial direction are provided at both ends of the arc portion of the cover member 20. In this case, the thicknesses of the extending portions 152a and 152b in the arrow A direction are set to the depths of the concave portions 136n and 136u to 136w in the arrow A direction. Furthermore, in the ninth modified example, two concave portions 136v and 136w are formed in the pressing portion 142, but the other two concave portions 136n and 136u are provided with the pressing portion 142 and the mounting portion 138 as shown in FIG. It is formed by sandwiching two extending portions 152a and 152b at both ends.

  Therefore, in the ninth modified example, the end portions of the coil terminals 18x and 18y and the two extending portions 152a and 152b that are bundled are sandwiched between the pressing portion 142 and the mounting portion 138, whereby each concave portion 136n. The ends of the coil terminals 18x and 18y are accommodated in 136u to 136w, respectively. The pressing portion 142, the extending portion 152a, and the mounting portion 138 are fastened with the bolt 150a, and on the other hand, the pressing portion 142, the extending portion 152b, and the mounting portion 138 are fastened with the bolt 150b. The ends of 18x and 18y are held together, and the holding member 134 and the cover member 20 are connected.

  Also in the ninth modification, since the ends of the coil terminals 18x and 18y are held together, the same effects as those of the seventh modification and the eighth modification can be obtained. Further, in the ninth modification, since the cover member 20 and the holding member 134 are used in combination, the position of each coil terminal 18x, 18y can be efficiently regulated, and each coil terminal 18x, 18y is radially outward. The loosening can be effectively suppressed. That is, in the ninth modification, the toughness against the looseness of the coil terminals 18x and 18y can be further improved.

  In the ninth modification, instead of fastening the pressing portion 142, the extension portions 152a, 152b, and the mounting portion 138 with the bolts 150a, 150b, the pressing portion 142, the extension portions 152a, 152b, and the mounting portion 138 are used. Adhesion, caulking, or slaughtering may be used. In any case, since the ends of the coil terminals 18x and 18y in a bundle can be held together, the effect of the eighth modification can be easily obtained.

  In the ninth modification, the cover member 20 and the holding member 134 are connected by the bolts 150a and 150b. However, the cover member 20 and the holding member 134 are fixed to other parts such as the holder 12. Is also possible.

DESCRIPTION OF SYMBOLS 10 ... Stator 12 ... Holder 12a ... Inner peripheral surface 14 ... Divided core part 16 ... Stator core 18 ... Coil 18B ... Coil winding part 18x, 18y ... Coil terminal 20 ... Cover member 22, 124a-130a, 124b-130b ... Protrusion part 24, 150a, 150b ... Bolts 25n, 25u-25w ... Connection part 26 ... Teeth 28 ... Insulating member 38 ... Winding part 40 ... Leading part 50 ... Plate-like part 52 ... Coil terminal accommodating part 52a, 52b ... Block 52c ... Connection Portions 56a to 62a, 56b to 62b ... grooves 63a, 63b ... openings 64a, 64b ... main body portions 66a-80a, 66b-80b ... inner wall portions 82a-88a, 82b-88b, 136n, 136u-136w ... recesses 90a-96a , 90b to 96b ... convex portions 100a to 106a, 100b to 106b ... bottom 110 ... notches 120, 132 ... butting part
122 ... Phase determining portion 134 ... Holding member 138 ... Placing portion 142 ... Pressing portions 144, 152a, 152b ... Extending portion 146 ... engaging portion 148 ... engaging hole

Claims (7)

A plurality of teeth arranged along a circumferential direction; a plurality of coils wound around the teeth; and a holder for accommodating the plurality of teeth and the plurality of coils .
The coil is
Of the multiple phase coils, the same phase coils are connected in parallel to each other,
A coil winding portion wound around the teeth;
A coil terminal drawn from the coil winding portion and routed along the circumferential direction;
A connection part in which coil terminals of the same phase in the coils of the plurality of phases are connected, and
In the stator of a motor with
The stator is provided with a groove having an opening formed radially outward of the stator , and includes an insulating member attached to the teeth .
The coil terminal is accommodated in the groove,
A stator for a motor, wherein a cover member that is disposed in a gap between the holder and the insulating member and closes the groove portion in which the coil terminal is accommodated is attached to the groove portion. The stator of the motor according to claim 1 ,
Before SL cover member is formed in an annular shape, a stator of a motor, characterized in that it is fixed to the insulating member in the radial direction outside the opening. The stator of the motor according to claim 2,
The stator of a motor, wherein the cover member is fixed by being press-fitted into the insulating member outside the opening in the radial direction. In the stator of the motor according to claim 2 or 3,
A stator for a motor, wherein a notch portion is provided at a position corresponding to the connection portion of the cover member. In the stator of the motor according to any one of claims 1 to 4,
The cover member is formed in an arc shape by cutting out a position where the connection portion is arranged in the circumferential direction,
An arc-shaped portion of the cover member closes the opening. A motor stator. In the stator of the motor according to any one of claims 1 to 5,
The multi-phase connection portion is provided to protrude outside the groove portion at a predetermined position in the circumferential direction,
The stator includes a holding member that collectively holds the plurality of phase connection portions that are bundled and connected to each other in- phase coil terminals in a separated state . A plurality of teeth arranged along the circumferential direction, and a plurality of coils wound around the teeth,
The coil is
Of the multiple phase coils, the same phase coils are connected in parallel to each other,
A coil winding portion wound around the teeth;
A coil terminal drawn from the coil winding portion and routed along the circumferential direction;
A connection part in which coil terminals of the same phase in the coils of the plurality of phases are connected, and
In the stator of a motor with
The stator includes an insulating member provided with a groove having an opening at at least one end,
The coil terminal is accommodated in the groove,
The multi-phase connection portion is provided at a predetermined position in the circumferential direction so as to protrude to the outside of the groove portion,
The stator includes a holding member that collectively holds the plurality of phase connection portions that are bundled and connected to each other in- phase coil terminals in a separated state .

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