JP2014090532A - Stator of dynamo-electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator of dynamo-electric machine in which insulation quality of the lead wires of a winding can be maintained.SOLUTION: A plurality of lead wires of the same phase or all phases have a routing part 19a routed in the circumferential direction, an extension part 19c extended from a predetermined point in the circumferential direction of the routing part 19a toward the outside of conductor end holding grooves 56a-62a, 56b-62b, a bend 19b connecting the routing part 19a and extension part 19c, and a coupling part 19d where a plurality of lead wires are coupled, at the extension part 19c, by a neutral terminal N, and bus bars U, V, W. A stator 10 includes a clip 90 for pressing the plurality of lead wires toward the inside of conductor end holding grooves 56a-62a, 56b-62b at the bend 19b.

Description

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

  Conventionally, in a stator of a rotating electrical machine that is formed by arranging a plurality of stator pieces in an annular shape having a split core, an insulator that surrounds a part of the split core, and a coil that winds the split core via the insulator. Rotating electric machines, for example, motors, that connect the terminal portions of the coils of the stator pieces to an annular conductor (bus ring) connected to the input terminals are widely used.

  In such a stator of a rotating electrical machine, the number of bus rings corresponding to the number of phases is prepared, and the terminal portions of the coils of the same phase are electrically connected to one bus ring via a terminal. For this reason, there are many parts necessary for the wire connection processing of the coil terminal portion, the manufacturing cost of the rotating electrical machine increases, and the work of the wire connection processing is complicated, leading to a decrease in productivity.

  As shown in FIG. 19, as shown in FIG. 19, the stator core 111 arranged in an annular shape and the stator core 111 are provided at intervals in the circumferential direction of the stator core 111. U-phase, V-phase, and W-phase coil sections 112 (112U, 112V, 112W) that are arranged, and drawn out from each coil section 112 and wired along the stator core 111, respectively, A plurality of coil lead wires 113 (113U, 113V, 113W) connected together for each and a plurality of coil lead wires 113 attached to the stator core 111 and interposed between the coil portion 112 and the coil lead wires 113 and the stator core 111. A stator 103 having an insulating mounting member 114 is known (see Patent Document 1).

  Here, in-phase coil lead wires 113 (for example, U-phase coil lead wires 113U) drawn from the respective coil portions 112 (for example, U-phase coil portion 112U) are provided in the stator 103. In the section, six sleeves (connection members) 118 are connected together.

JP 2009-278848 A

  However, in the invention described in Patent Document 1, the sleeve 118 is connected at the extending portion 113A that extends the coil lead wire 113 in the radial direction, and is restrained by the curved portion 113B of the coil lead wire 113 (113U). Power is not granted. In this configuration, when the extending portion 113A contracts and a force that pulls the curved portion 113B toward the outer diameter side of the insulating mounting member 114 is applied, the coil lead wire 113 rubs against the insulating mounting member 114 or the coil lead wires 113 are connected to each other. May rub against each other, damaging the insulation coating of the coil lead wire 113 and causing insulation deterioration.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a stator for a rotating electrical machine that can maintain insulation of a lead wire of a winding.

In order to achieve the above object, the invention described in claim 1
A multi-phase winding (winding 18a in an embodiment described later);
An accommodating portion (conducting wire end holding grooves 56a to 62a, 56b to 62b in embodiments described later) that accommodates the lead wires of the windings of each phase and is routed in the circumferential direction;
With
A stator of a rotating electrical machine (stator 10 in an embodiment described later) in which a plurality of lead wires of the same phase or all phases are accommodated in the accommodating portion,
A plurality of lead lines of the same phase or all phases are:
A routing portion (a routing portion 19a in an embodiment described later) routed in the circumferential direction;
An extension part (extension part 19c in an embodiment to be described later) extending toward the outside of the accommodating part from a predetermined position in the circumferential direction of the routing part;
A curved portion (curved portion 19b in an embodiment described later) connecting the routing portion and the extending portion;
In the extending portion, a connecting portion (a connecting portion 19d in an embodiment described later) in which a plurality of lead wires are connected to each other by a terminal member (neutral terminal N, bus bar U, V, W in the embodiment described later),
Have
The bending portion includes a fixing member (a clip 90 in an embodiment described later) that presses a plurality of lead wires into the housing portion.

In addition to the structure of Claim 1, the fixing member according to Claim 2 is
A cylindrical part (cylindrical part 92 in an embodiment described later) for bundling a plurality of lead wires in the extension part;
A pressing portion (pressing portion 94 in an embodiment described later) extending along the curved portion from the tubular portion toward the inside of the accommodating portion;
Have
The pressing portion presses the bending portion toward the inside of the housing portion by plastically deforming the cylindrical portion.

According to a third aspect of the present invention, in addition to the configuration according to the second aspect, the bending portion includes the routing portion that is routed to one side in the circumferential direction, and the routing portion that is routed to the other side in the circumferential direction. , Is composed of,
The pressing portion is provided on one side in the circumferential direction and the other side in the circumferential direction of the bending portion.

In addition to the structure of Claim 2 or 3, the invention of Claim 4 is the width | variety of the said press part (rotating-axis direction width | variety in below-mentioned embodiment) is the width | variety of the said accommodating part (rotation in below-mentioned embodiment) It is characterized by being narrower than the axial width.

The invention according to claim 5 includes, in addition to the configuration according to any one of claims 2 to 4, an opposing surface (an inner surface 92b in an embodiment described later) facing the extension portion of the cylindrical portion. In addition, an insulating member (insulating member 96 in an embodiment described later) that secures insulation between the cylindrical portion and the extending portion is provided,
The pressing portion extends from the insulating member of the cylindrical portion toward the housing portion along the curved portion, and is formed of an insulating material.

According to a sixth aspect of the present invention, in addition to the configuration according to the fifth aspect, of the opposing surfaces of the cylindrical portion facing the extending portion, the surface where the insulating member is not provided (in the embodiments described later) The two inner surfaces 92b) on both sides in the rotation axis direction are characterized in that they are separated from the extending part.

In addition to the structure of any one of Claims 2-5, the said fixing member is the said extension part and the said curved part from the said cylindrical part toward the said accommodating part side. It has further the convex part (in below-mentioned embodiment) which presses the side surface (both sides in the rotating shaft direction in below-mentioned embodiment).

According to an eighth aspect of the present invention, in addition to the configuration according to any one of the first to seventh aspects, the fixing member is covered with a cover (cover 99 in an embodiment described later) formed of an insulating material. It is characterized by being.

According to the first aspect of the present invention, the bending portion includes the fixing member that presses the plurality of lead wires toward the inside of the accommodating portion. Therefore, even when the terminal member or the extension portion contracts due to a temperature change during operation of the rotating electrical machine and a force that pulls the bending portion to the outside of the housing portion works, the plurality of lead wires in the bending portion are brought into the housing portion by the fixing member. Since it can press toward, it can control that a plurality of leader lines disperse and vibrate in a curved part or a routing part.
Therefore, it is possible to prevent the lead wires from rubbing against the housing portion or from rubbing the lead wires together, and to prevent the insulation coating of the lead wires from being damaged.

  According to the second aspect of the present invention, the pressing portion presses the curved portion toward the inside of the housing portion by plastically deforming the cylindrical portion of the fixing member. That is, since the pressing portion is not directly plastically deformed, it is possible to prevent an excessive force from being applied to the housing portion and to suppress damage to the housing portion.

  According to the invention described in claim 3, the bending portion is configured by joining the routing portion routed to one circumferential side and the routing portion routed to the other circumferential side, The pressing portion is provided on one circumferential side and the other circumferential side of the bending portion. Therefore, when the pressing portion presses the bending portion toward the inside of the housing portion, the bending portion can be pressed from both sides in the circumferential direction. Therefore, even when the lead wire is routed so that the routing portion routed to one circumferential direction and the routing portion routed to the other circumferential direction merge, a plurality of drawers are provided in the curved portion. It can suppress effectively that a line is scattered.

  According to invention of Claim 4, the width | variety of a press part is narrower than the width | variety of an accommodating part. Therefore, when the pressing portion presses the lead wire toward the inside of the housing portion, it can be prevented from coming into contact with the side surface (wall portion) of the housing portion, and a plurality of lead wires can be pressed more reliably.

According to the fifth aspect of the present invention, the opposing surface facing the extension portion of the cylindrical portion is provided with the insulating member that ensures insulation between the cylindrical portion and the extension portion, and the pressing portion is a cylinder It extends along the curved portion from the insulating member of the shape portion toward the accommodating portion, and is formed from an insulating material. Therefore, by plastically deforming the cylindrical portion, when the pressing portion presses the curved portion toward the inside of the housing portion, the fixing member and the lead wire are not in direct contact with each other, and damage to the insulation coating of the lead wire is suppressed. I can do it.
In addition, even if the insulation coating of the lead wire is damaged, it is possible to suppress conduction between the fixing member and the lead wire. For this reason, it is possible to suppress an electrical short circuit between the fixing member and the other phase lead wire, the other phase lead wire fixing member, or a peripheral component such as a stator holder.
In addition, the current density of the surface facing the pressing portion of the curved portion tends to be high, but according to the configuration, insulation can be ensured.

  According to the sixth aspect of the present invention, since the surface where the insulating member is not provided among the opposing surfaces facing the extending portion of the cylindrical portion is separated from the extending portion, the fixing member and the drawer It can suppress more effectively that a line | wire and conduct | electrically_connecting.

  According to the seventh aspect of the present invention, since it further has a convex portion that presses the side surface of the extending portion and the curved portion from the cylindrical portion toward the housing portion side, the side surface of the lead wire can also be pressed, and the lead wire Can be held more stably.

  According to the eighth aspect of the present invention, since the fixing member is covered with the cover formed of an insulating material, the fixing member and another phase lead wire or another phase lead wire are fixed. It is possible to suppress a short circuit between a member or a peripheral component such as a stator holder.

It is a top view of the stator of the rotary electric machine which concerns on this embodiment. It is a perspective view of the stator piece of FIG. It is a disassembled perspective view of the stator piece of FIG. It is a partial front view of the insulator of FIG. FIG. 3 is a partial cross-sectional view of the insulator of FIG. 2. It is explanatory drawing which illustrated typically accommodation of the coil | winding to a conducting wire end holding groove. It is a partial perspective view of the insulator of FIG. It is sectional drawing which shows the state assembled | attached with respect to the lead wire of the coil | winding which comprises a U-phase coil. It is a perspective view which shows the state with which the clip was assembled | attached with respect to the lead wire of the coil | winding which comprises the coil of W phase. It is a principal part perspective view of the stator of FIG. It is sectional drawing which shows a mode that the clip of FIG. 8 is inserted with respect to the lead wire of a coil | winding. It is sectional drawing which shows a mode that the clip inserted in FIG. 11 is clamped. 10 is a perspective view of a clip according to Modification 1. FIG. FIG. 14 is a perspective view illustrating a state in which the clip of FIG. 13 is assembled to a lead wire of a winding constituting a W-phase coil. FIG. 14 is a cross-sectional view showing a state in which the clip of FIG. 13 is assembled to a lead wire of a winding constituting a W-phase coil. It is a perspective view of the clip concerning the modification 2. FIG. 17 is a perspective view showing a state in which the clip of FIG. 16 is assembled to a lead wire of a winding that constitutes a neutral point. It is sectional drawing which shows the state with which the clip concerning the modification 3 was assembled | attached with respect to the lead wire of the coil | winding which comprises the coil of a U phase. It is a fragmentary perspective view which shows the conventional stator.

  Embodiments of a stator for a rotating electrical machine according to the present invention will be described below in detail with reference to the accompanying drawings.

(First embodiment)
FIG. 1 is a plan view of a stator 10 of a rotating electrical machine according to the present embodiment. The stator 10 constitutes a rotating electric machine in combination with a rotor (not shown) provided therein, and is used as, for example, an electric motor or a generator.

  The stator 10 is a so-called three-phase Y-type salient-pole stator, and has a hollow holder 12, bus bars (terminal members) U, V, and W that form three-phase input terminals, and neutral points. A neutral terminal (terminal member) N to be formed, and an annular stator group 16 formed by annularly arranging a plurality (18 in FIG. 1) of stator pieces 14 along the inner peripheral surface 12a of the holder 12. I have.

  The annular stator group 16 includes six stator pieces 14 each having U-phase, V-phase, and W-phase coils 18. In this case, in the annular stator group 16, the plurality of stator pieces 14 are arranged in an annular shape, whereby a U phase (U1 phase to U6 phase), a V phase (V1 phase to V6 phase), and a W phase (W1 phase to W1 phase). The coils 18 of (W6 phase) are arranged in the order of U1, V1, W1, U2,..., U6, V6, W6 in the clockwise direction of FIG.

  Next, among the stator pieces 14 having the coils 18 of the U1 phase to U6 phase, the V1 phase to V6 phase, and the W1 phase to W6 phase, the configuration of one stator piece 14 will be described representatively. In addition, the structure of the stator piece 14 demonstrated here is a structure common to the stator piece 14 of all the phases.

  As shown in FIG. 2 and FIG. 3, the stator piece 14 is a divided core configured by laminating a plurality of substantially T-shaped metal plates (steel plates) 22 punched by pressing in the rotation axis direction (arrow A direction). 24, an insulator 26 that electrically insulates the split core 24, and a coil 18 that includes a winding 18 a that is wound around the split core 24 via the insulator 26. The winding 18a is a rectangular wire having a rectangular cross section.

  The substantially T-shaped split core 24 has a yoke portion 24a extending along the circumferential direction (arrow C direction) on the outer diameter side (arrow B1 direction) and the yoke portion 24a toward the inner diameter side (arrow B2 direction). And a magnetic pole portion 24b extending. Also, a substantially semicircular fitting recess 32 is formed at the end of the yoke portion 24a in the arrow C2 direction, and an approximately half corresponding to the fitting recess 32 is formed at the end of the yoke portion 24a in the arrow C1 direction. A circular fitting convex portion 34 is formed.

  The insulator 26 is made of an electrically insulating material such as a flexible resin. The insulator 26 has a winding portion 38 around which the winding 18a is wound, and protrudes from the winding portion 38 in the direction of the arrow B1, and the lead wire (starting end portion or terminal end portion) of the winding 18a extends along the arrow C direction to the bus bar. And a guide portion 40 for guiding to U, V, W and the neutral terminal N. Hereinafter, the portion of the lead wire of the winding 18a that is guided by being guided in the circumferential direction (in the direction of arrow C) by the guide portion 40 is referred to as a routing portion 19a.

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

  The upper winding portion 38a includes an upper winding portion main body 42a formed in a substantially U-shaped cross section, and an upper inner peripheral wall 44a erected on an inner diameter side (arrow B2 direction) end of the upper winding portion main body 42a. And an upper outer peripheral wall 46a erected at the end in the arrow B1 direction of the upper winding portion main body 42a so as to face the upper inner peripheral wall 44a.

  The lower winding portion 38b has a lower winding portion main body 42b formed in a substantially U-shaped cross section so as to face the upper winding portion main body 42a and a lower winding portion so as to face the upper inner peripheral wall 44a. A lower inner peripheral wall 44b erected at the end in the arrow B2 direction of the part main body 42b, and a lower erected at the end in the arrow B1 direction of the lower winding part main body 42b so as to face the lower inner peripheral wall 44b. Side outer peripheral wall 46b.

  Accordingly, when the upper winding portion 38a and the lower winding portion 38b are fitted so as to sandwich the magnetic pole portion 24b of the split core 24, the upper winding portion main body 42a, the lower winding portion main body 42b, and the upper inner peripheral wall 44a and the lower inner peripheral wall 44b, and the upper outer peripheral wall 46a and the lower 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 48 is formed in the center of the winding portion 38 along the direction of arrow B. Thereby, while the magnetic pole part 24b fits in the hole 48, it winds in the location between the upper side inner peripheral wall 44a and the lower side inner peripheral wall 44b in the winding part 38, and the upper side outer peripheral wall 46a and the lower side outer peripheral wall 46b. The coil 18 is configured by winding the wire 18a.

  On the other hand, the guide portion 40 is provided so as to protrude in the arrow B1 direction from the vicinity of the upper end portion of the upper outer peripheral wall 46a.

  The guide portion 40 is formed on the plate-like member 50 and the plate-like member 50, and is substantially U-shaped in the plan view of FIG. 1, and behind the lead wire containing portion 52 (on the back in the direction of arrow B2). And an end fixing portion 54 for fixing the end portion of the winding 18a wound around the winding portion 38.

  The conducting wire accommodating portion 52 is configured to accommodate the lead wire routing portion 19 a of the winding 18 a wound around the winding portion 38 in the arrow C direction.

  That is, the conducting wire accommodating part 52 connects the blocks 52a and 52b standing on the arrow C2 direction side and the arrow C1 direction side of the plate-like member 50, respectively, and the connecting part 52c connecting the back surfaces of the blocks 52a and 52b in the arrow B2 direction. And. As shown in FIG. 4, the block 52a extends in the direction of the arrow C, and has a width in the direction of the rotation axis (length along the direction of the arrow A) that can accommodate the lead-out portion 19a of the lead wire of the winding 18a. Conductive wire end holding grooves 56a to 62a having a radial width (length along arrow B direction) are provided at predetermined intervals in the rotation axis direction (arrow A direction). On the other hand, similarly to the block 52a, the block 52b extends in the direction of the arrow C and has a lead wire end portion having a rotation axis direction width and a radial direction width capable of accommodating the lead wire routing portion 19a of the winding 18a. Holding grooves 56b to 62b are provided at predetermined intervals in the direction of arrow A. As shown in FIGS. 2 to 5, the conductor end holding groove 56a and the conductor end holding groove 56b, the conductor end holding groove 58a and the conductor end holding groove 58b, the conductor end holding groove 60a and the conductor end. The holding groove 60b, the conductor end holding groove 62a, and the conductor end holding groove 62b have substantially the same shape.

  In addition, the portions that define the conductive wire end holding grooves 56a to 62a in the block 52a are bowl-shaped wall portions 66a to 74a that extend in a flat plate shape from the main body portion 64a of the block 52a in the arrow B1 direction and the arrow C2 direction. Configured as Also in the block 52b, as in the case of the block 52a, the portions defining the conductive wire end holding grooves 56b to 62b extend from the main body 64b of the block 52b in a flat plate shape in the arrow B1 direction and the arrow C1 direction. It is comprised as a shape | molded wall part 66b-74b. The wall portions 72a and 72b are connected in the direction of arrow C by a connecting portion 76.

  By the way, in each stator piece 14 in the annular stator group 16, windings 18 a of rectangular wires having the same shape are wound to constitute the coils 18. In the lead wire accommodating portion 52, the lead wire lead portion 19a of the winding 18a is drawn in the arrow C direction with the long side of the flat wire extending along the arrow A direction (see FIG. 5). The holding grooves 56a to 62a and 56b to 62b are accommodated. Therefore, as shown in FIG.4 and FIG.5, each conducting wire end holding groove 56a-62a, 56b-62b has a substantially identical shape. Moreover, as shown in FIG. 5, the radial width (length along the arrow B direction) of the uppermost conductor end holding grooves 56a and 56b among the conductor end holding grooves 56a to 62a and 56b to 62b. Is larger than the radial width of the other conductor end holding grooves 58a to 62a, 58b to 62b. Furthermore, the radial widths of the other conductor end holding grooves 58a to 62a and 58b to 62b are substantially the same.

  The conductor end holding groove 56a and the conductor end holding groove 56b, the conductor end holding groove 58a and the conductor end holding groove 58b, the conductor end holding groove 60a, the conductor end holding groove 60b, and the conductor end holding groove 62a. In the lead wire end holding groove 62b, the lead wire lead portion 19a of the winding 18a having the same phase is routed and accommodated.

  Here, the lead wire end holding groove 56a and the routing portion 19a accommodated in the lead wire end holding groove 56b constitute a coil 18 of U1 phase to U3 phase, V1 phase to V3 phase, W1 phase, W2 phase, and W6 phase. What is to be wound around one side in the circumferential direction (clockwise in FIG. 1), and what constitutes a coil 18 of U4 phase to U6 phase, V4 phase to V6 phase, W3 phase to W5 phase is the other side in the circumferential direction ( In FIG. 1, it is routed counterclockwise.

  Further, in the lead wire holding portion 58a and the lead wire holding portion 58b accommodated in the lead wire end holding groove 58b, the one constituting the U1 phase to U3 phase coil 18 is arranged on one side in the circumferential direction (clockwise in FIG. 1). The components constituting the U4-phase to U6-phase coils 18 are routed to the other circumferential side (counterclockwise in FIG. 1).

  Further, the lead wire 19a accommodated in the lead wire end holding groove 60a and the lead wire end holding groove 60b is composed of the V1 phase, V2 phase and V6 phase coils 18 on one side in the circumferential direction (in FIG. Around the other side of the circumferential direction (counterclockwise in FIG. 1).

  In addition, the lead wire holding portion 62a and the routing portion 19a accommodated in the lead wire end holding groove 62b are composed of the W1 phase, W2 phase, and W6 phase coils 18 on one side in the circumferential direction (in FIG. Around the other side of the circumferential direction (counterclockwise in FIG. 1).

  Therefore, the conductor end holding grooves 56a and 56b having the largest radial width include nine windings 18a from the U1 phase to the U3 phase, the V1 phase to the V3 phase, the W1 phase, the W2 phase, and the W6 phase, or U4. Nine windings 18a from phase to U6 phase, V4 phase to V6 phase, W3 phase to W5 phase are routed and accommodated. In this case, an end fixing portion 54 for fixing the end portion of the winding 18a is disposed behind the block 52b. As shown in FIG. 7, the end fixing portion 54 has a width substantially the same as the width of the long side of the winding 18a, and a standing portion 54a that stands in the direction of arrow A along the block 52b. It is comprised from the wall part 54b bulged from the arrow B2 direction side of the installation part 54a. Accordingly, in each stator piece 14, the end portion of the winding 18 a wound around its own winding portion 38 has the long side of the rectangular wire along the surface of the standing portion 54 a and the short side thereof. It is fixed to the terminal fixing part 54 in a state along the wall part 54b and the block 52b, and is drawn around the conductor end holding grooves 56a and 56b. In FIG. 5, as an example of routing, a drawing portion 19 a when the windings 18 a are routed and accommodated in the conductor end holding grooves 56 a and 56 b is illustrated.

  Also, for the other conductor end holding grooves 58a to 62a and 58b to 62b having a smaller radial width than the conductor end holding grooves 56a and 56b, the conductor end holding grooves 58a and 58b include U1 phase to U3 phase. 3 or a total of U4 phase to U6 phase, and three windings 18a are routed and housed, and the conductor end holding grooves 60a and 60b have a total of V1, V2, and V6 phases. 3 or a total of 3 windings 18a from V3 phase to V5 phase is accommodated and accommodated, and the conductor end holding grooves 62a and 62b have a total of 3 of the W1, W2 and W6 phases. The three windings 18a are routed and housed in total, or the total of W3 phase to W5 phase.

  As described above, the conductor end holding grooves 56a and 56b constitute the accommodating portion for accommodating the lead wire routing portions 19a of the windings 18a of all phases and the circumferential direction, and the conductor end holding grooves. 58a-62a, 58b-62b respectively constitute a lead wire routing portion 19a of the winding 18a of each phase and a storage portion that is routed in the circumferential direction.

  Furthermore, each wall part 66a-74a, 66b-74b is formed with the convex part or recessed part extended in the arrow B direction facing each conducting wire end holding groove 56a-62a, 56b-62b.

  Specifically, in the block 52a, arc-shaped concave portions 80a to 86a extending in the arrow B direction are formed on the lower surfaces of the wall portions 66a to 72a so as to face the conductor end portion holding grooves 56a to 62a, respectively. Yes. On the other hand, on the upper surfaces of the wall portions 68a to 74a, arc-shaped convex portions 88a to 94a extending in the arrow B direction so as to face the conductive wire end holding grooves 56a to 62a are opposed to the concave portions 80a to 86a. Each is formed.

  In contrast, in the block 52b, convex portions 88b to 94b are formed on the lower surfaces of the wall portions 66b to 72b, while concave portions 80b to 86b are formed on the upper surfaces of the wall portions 68b to 74b.

  Specifically, arc-shaped convex portions 88b to 94b extending in the arrow B direction are formed on the lower surfaces of the walls 66b to 72b so as to face the conductor end holding grooves 56b to 62b, respectively. On the other hand, on the upper surfaces of the walls 68b to 74b, arc-shaped concave portions 80b to 86b extending in the direction of arrow B facing the conductor end holding grooves 56b to 62b are opposed to the convex portions 88b to 94b. Each is formed.

  Here, as shown in FIG.4 and FIG.5, with respect to the bottom face 100a-106a, 100b-106b (surface of the main-body parts 64a, 64b direction of the arrow B1) of each conducting wire end holding groove 56a-62a, 56b-62b. If the lead wire routing portion 19a of each winding 18a is routed to each of the conductive wire end holding grooves 56a to 62a and 56b to 62b with the long side of the flat wire aligned, the lead wire routing of each winding 18a is routed. The part 19a is accommodated as follows.

  That is, as described above, in each stator piece 14, recesses 80a to 86a are formed on the lower surfaces of the walls 66a to 72a of one block 52a so as to face the conductor end holding grooves 56a to 62a. Protrusions 88a to 94a are formed on the upper surfaces of the walls 68a to 74a so as to face the conductor end holding grooves 56a to 62a and to face the recesses 80a to 86a. Further, convex portions 88b to 94b are formed on the lower surfaces of the wall portions 66b to 72b of the other block 52b so as to face the conductive wire end holding grooves 56b to 62b, and on the upper surfaces of the wall portions 68b to 74b, Concave portions 80b to 86b are formed facing the conductive wire end holding grooves 56b to 62b so as to face the convex portions 88b to 94b.

  That is, in the front view of FIGS. 4 and 6, the conductor end holding groove 56a and the conductor end holding groove 56b, the conductor end holding groove 58a and the conductor end holding groove 58b, the conductor end holding groove 60a and the conductor end. The holding groove 60b, and the conductor end holding groove 62a and the conductor end holding groove 62b are provided with recesses 80a to 86a and 80b to 86b and projections 88a to 94a and 88b to 94b alternately along the arrow C direction. Thus, it is formed in a wave shape.

  Therefore, when each routing part 19a is accommodated in each of the conductor end holding grooves 56a to 62a and 56b to 62b, each routing part 19a is formed in the recesses 80a to 86a, 80b to 86b and the projections 88a to 94a, 88b to 94b. Each transforms along (turns). As a result, after drawing, the deformed portions bent by the concave portions 80a to 86a and 80b to 86b and the convex portions 88a to 94a and 88b to 94b try to return to the convex portions 88a to 94a and 88b to 94b side by the springback effect. Reaction force to act. Due to the reaction force, the deformed portion is pressed against the convex portions 88a to 94a and 88b to 94b, and as a result, the lead-out portion 19a of each winding 18a is placed on the convex portions 88a to 94a and 88b to 94b. In a state of being securely held, the lead wire end holding grooves 56a to 62a and 56b to 62b are respectively housed in a wave shape. Therefore, it is possible to suppress the winding 18a from sliding with the walls 66a, 66b, 68a, 68b due to vibration during the operation of the rotating electric machine, and the insulating coating of the winding 18a from being broken.

  Moreover, as shown in FIG. 1, the routing part 19a accommodated in the conducting wire end holding grooves 56a and 56b has nine windings 18a routed to one side in the circumferential direction (clockwise in FIG. 1). The lead wire and the lead wire of the nine windings 18a routed to the other side in the circumferential direction (counterclockwise in FIG. 1) merge at a position where it overlaps the midpoint terminal N in the circumferential direction.

  Similarly, the routing portion 19a accommodated in each of the conductive wire end holding grooves 58a to 62a and 58b to 62b is drawn out of the three windings 18a that are routed to one side in the circumferential direction (clockwise in FIG. 1). And the lead wires of the three windings 18a routed to the other side in the circumferential direction (counterclockwise in FIG. 1) are joined at positions where they overlap the bus bars U, V, W in the circumferential direction, respectively. To do.

  The combined lead wire of the winding 18a is bent toward the outside (outer diameter side) of each of the conductor end holding grooves 56a to 62a and 56b to 62b to form a bending portion 19b, and further, the bending portion 19b. An extending portion 19c is formed by extending toward the outer diameter side. Furthermore, the lead wires of the plurality of windings 18a have coupling portions 19d that are coupled to the neutral terminals N and bus bars U, V, and W by fusing at the outer diameter ends of the extending portions 19c.

  Here, as shown in FIGS. 8, 9, and 10, in the stator 10 of the present embodiment, in the bending portion 19 b, the lead wires of the plurality of windings 18 a are connected to the respective conductor end holding grooves 56 a to 62 a, 56 b to. A metal clip (fixing member) 90 that presses toward the inside of 62b, that is, toward the inner diameter side is provided.

  FIG. 8 shows a state in which the clip 90 presses the bending portion 19b of the lead wire of the winding 18a constituting the U-phase coil 18, and FIG. 9 shows the clip 90 in the W-phase. A state is shown in which the bending portion 19b of the lead wire of the winding 18a constituting the coil 18 is pressed. Further, as shown in FIG. 10, the clip 90 that presses the lead wire at the neutral point is more circumferential than the clip 90 that presses the lead wire constituting the U-phase, V-phase, and W-phase coils 18. Although the width is large, the basic configuration of both is the same.

  The clip 90 includes a cylindrical portion 92 that bundles a plurality of lead wires at the inner diameter side end portion of the extending portion 19c, that is, a portion where the curved portion 19b of the extending portion 19c is connected, and both sides of the cylindrical portion 92 in the circumferential direction. And a pair of pressing portions 94 extending along the curved portion 19b toward each of the conductor end holding grooves 56a to 62a and 56b to 62b.

  The cylindrical portion 92 has a hole 92a having a rectangular cross section substantially equal to the cross sectional shape of the extending portion 19c. Accordingly, the four inner surfaces 92b (facing surfaces) facing the extension portion 19c inside the cylindrical portion 92 abut against the extension portion 19c, and the extension portion 19c is placed in the hole 92a of the cylindrical portion 92. Hold on.

  The pressing portion 94 is provided on one side in the circumferential direction and the other side in the circumferential direction of the bending portion 19b. The inner diameter surface thereof is in contact with the outer diameter surface of the bending portion 19b, and the bending portion 19b is connected to each conductor end holding groove 56a. It pushes toward -62a and 56b-62b. Moreover, the rotation-axis direction width | variety of the press part 94 is larger than the rotation-axis direction width | variety of conducting wire edge part holding | maintenance groove | channel 56a-62a, 56b-62b so that the press part 94 may not contact wall part 66a-74a, 66b-74b. It is set narrowly. In addition, the outer diameter of the tip of the pressing portion 94 is set to be approximately equal to the outer diameter of the walls 66a to 74a and 66b to 74b that form the conductor end holding grooves 56a to 62a and 56b to 62b. The wall portions 66a to 74a and 66b to 74b are formed so as not to protrude to the outer diameter side.

  A method of assembling the clip 90 configured in this manner to the lead wire of the winding 18a will be described below.

  First, as shown in FIG. 11, the clip 90 is inserted into the extending portion 19c in a state before the outer diameter end of the extending portion 19c is fused by the neutral terminal N or the bus bars U, V, and W. . The insertion is performed until the cylindrical portion 92 is positioned around the inner diameter side end portion of the extending portion 19c. At this time, the hole 92a (see FIG. 9) of the cylindrical portion 92 of the clip 90 is formed to be substantially equal to or slightly larger than the cross-sectional shape of the extending portion 19c, and the clip 90 is inserted into the extending portion 19c. Is done smoothly.

  Next, as shown in FIG. 12, the cylindrical portion 92 is plastically deformed by clamping the cylindrical portion 92 from both sides in the circumferential direction toward the inside in the circumferential direction by a pair of clamp members 98. Here, the clamp member 98 has a flat surface facing the cylindrical portion 92, and a surface facing the pressing portion 94 is a curved surface corresponding to the surface shape of the pressing portion 94. By forming the clamp member 98 in such a shape, a clamping force is not directly applied to the pressing portion 94, but a clamping force is applied only to the cylindrical portion 92.

  The clamped cylindrical portion 92 is plastically deformed until the hole 92a has a shape substantially equal to the cross-sectional shape of the extended portion 19c, and the extended portion 19c is securely held. At this time, the cylindrical portion 92 is plastically deformed, so that the pressing portion 94 connected to the cylindrical portion 92 is also plastically deformed, and the curved portion 19b is directed into the conductor end holding grooves 56a to 62a and 56b to 62b. And press.

  The pressing force of the pressing portion 94 on the bending portion 19b can be adjusted by managing the amount of plastic deformation of the cylindrical portion 92, that is, the clamping force on the cylindrical portion 92. Thereby, it is possible to hold | maintain the lead wire in the curved part 19b with a suitable pressing force, and it can suppress that an excessive pressing force acts on each conducting wire end part holding groove 56a-62a, 56b-62b.

As described above, according to the stator 10 of the rotating electrical machine of the present embodiment, the clip 90 that presses the plurality of lead wires into the conductor end holding grooves 56a to 62a and 56b to 62b in the curved portion 19b. Prepare. Therefore, the bus bars U, V, W, the neutral terminal N or the extending portion 19c contract due to temperature changes during operation of the rotating electrical machine, and the curved portion 19b is placed outside the conductor end holding grooves 56a to 62a, 56b to 62b ( Even when a pulling force is applied to the outer diameter side), the clip 90 can press the plurality of lead wires in the bending portion 19b toward the inside of the conductor end holding grooves 56a to 62a and 56b to 62b. Alternatively, it is possible to prevent the plurality of lead lines from being scattered and vibrated in the routing portion 19a.
Accordingly, it is possible to prevent the lead wires from rubbing against the conductor end holding grooves 56a to 62a and 56b to 62b, or from rubbing the lead wires to each other, and damage to the insulating coating of the lead wires. Can be suppressed.

  Further, the cylindrical portion 92 of the clip 90 is plastically deformed, whereby the pressing portion 94 presses the curved portion 19b toward the inside of the conductor end holding grooves 56a to 62a and 56b to 62b. That is, since the pressing portion 94 is not directly plastically deformed, an excessive force can be prevented from being applied to the conductor end holding grooves 56a to 62a and 56b to 62b, and damage to the conductor end holding grooves 56a to 62a and 56b to 62b can be prevented. Can be suppressed.

  Further, the bending portion 19b is configured by joining a routing portion 19a routed to one circumferential side and a routing portion 19a routed to the other circumferential side, and the pressing portion 94 is curved. It is provided in the circumferential direction one side and the circumferential direction other side of the part 19b. Therefore, when the pressing portion 94 presses the bending portion 19b toward the inside of the conductor end portion holding grooves 56a to 62a and 56b to 62b, the bending portion 19b can be pressed from both sides in the circumferential direction. Therefore, even in the case where the lead wire is routed so that the routing portion 19a routed to one circumferential side and the routing portion 19a routed to the other circumferential direction merge, It is possible to effectively prevent the plurality of lead lines from being scattered.

  Moreover, since the rotation-axis direction width | variety of the press part 94 is set narrower than the rotation-axis direction width | variety of conducting wire end holding groove 56a-62a, 56b-62b, the pressing part 94 is conducting wire end holding groove 56a-62a. , 56 b to 62 b, when pressing the lead wire into the lead wire end holding grooves 56 a to 62 a, 56 b to 62 b can be prevented from contacting the side surfaces (wall portions 66 a to 74 a, 66 b to 74 b), Multiple lead wires can be pressed down more reliably.

  It should be noted that 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.

(Modification 1)
For example, as shown in FIGS. 13, 14, and 15, the cylindrical portion 92 of the clip 90 has a cylindrical shape on two inner surfaces 92 b on both sides in the circumferential direction among the four inner surfaces 92 b facing the extending portion 19 c. A pair of insulating members 96 that ensure insulation between the portion 92 and the extending portion 19c may be provided.

  The insulating member 96 is made of an insulating material such as resin or rubber, and is in contact with the extending portion 19c and the cylindrical portion 92 in the circumferential direction so as to be closer to the outer diameter and inner diameter side than the cylindrical portion 92. An extending base portion 96a, an outer diameter side convex portion 96b projecting in a circumferential direction from an outer diameter side end portion of the base portion 96a, and an inner diameter surface thereof abutting against an outer diameter surface of the cylindrical portion 92, and an inner diameter side end of the base portion 96a And an inner-diameter convex portion 96 c that protrudes from the portion in the circumferential direction and whose outer diameter surface comes into contact with the inner diameter surface of the cylindrical portion 92. In addition, the radial direction width | variety of the outer diameter side convex part 96b is set larger than the radial direction width | variety of the inner diameter side convex part 96c.

  Further, the pressing portion 94 extends along the curved portion 19 b from the inner diameter side end portion of the base portion 96 a of the insulating member 96 toward the conductor end holding grooves 56 a to 62 a and 56 b to 62 b. That is, the pressing portion 94 is formed integrally with the insulating member 96 and is made of an insulating material such as resin or rubber.

As described above, according to the present modification, the insulating member 96 that ensures insulation between the cylindrical portion 92 and the extending portion 19c is provided on the inner surface 92b of the cylindrical portion 92 that faces the extending portion 19c. The pressing portion 94 extends from the insulating member 96 of the cylindrical portion 92 along the curved portion 19b toward the conductor end holding grooves 56a to 62a and 56b to 62b, and is made of an insulating material. Therefore, when the pressing portion 94 presses the curved portion 19b toward the inside of the conductor end holding grooves 56a to 62a and 56b to 62b by plastically deforming the cylindrical portion 92, the clip 90 and the lead wire are directly connected. It is possible to suppress damage to the insulation coating of the lead wire without contact.
Further, even if the insulation coating of the lead wire is damaged, it is possible to suppress conduction between the metal portion of the clip 90 and the lead wire. For this reason, it can suppress that the metal part of the clip 90 and peripheral components, such as the lead wire of another phase, the clip 90 of the lead wire of another phase, or the holder 12, etc. are short-circuited.
Further, the current density of the surface of the curved portion 19b facing the pressing portion 94 tends to be high, but according to the configuration of this modification, insulation can be ensured.

  Of the four inner surfaces 92b facing the extending portion 19c of the cylindrical portion 92, the surfaces where the insulating member 96 is not provided, that is, the two inner surfaces 92b on both sides in the rotation axis direction are separated from the extending portion 19c. It is desirable. By comprising in this way, it can suppress more effectively that the metal part of the clip 90 and an extraction line will be conduct | electrically_connected.

(Modification 2)
Further, as a second modification, as shown in FIGS. 16 and 17, the clip 90 is connected to the lead end holding grooves 56 a to 62 a and 56 b to 62 b from the circumferential intermediate portions on both sides in the rotation axis direction of the cylindrical portion 92. It is good also as a structure which has a pair of convex part 93 extended toward the side (inner diameter side).

  The pair of convex portions 93 press and hold both side surfaces of the extending portion 19c and the bending portion 19b in the rotation axis direction, and stabilize the holding of the lead wire. In addition, the internal diameter of the convex part 93 is set so that it may become larger than the outer diameter of wall part 66a-74a, 66b-74b, and the contact with the convex part 93 and wall part 66a-74a, 66b-74b is prevented. Is done.

(Modification 3)
As a third modification, as shown in FIG. 18, the clip 90 may be covered with a cover 99 formed of an insulating material such as resin or rubber. More specifically, the cover 99 covers the outer diameter side of the clip 90 and the periphery of the outer diameter side end portions of the cylindrical portion 92 and the pressing portion 94, and at least the wall portions 66 a to 74 a and 66 b to 74 b. It is located on the outer diameter side, more desirably on the outer diameter side than the holder 12.

  This prevents the contact between the cover 99 and the walls 66a to 74a, 66b to 74b or the holder 12, and the clip 90 and the other-phase lead wire or the other-phase lead wire clip 90, or It is possible to suppress an electrical short circuit between peripheral parts such as the holder 12.

  In the above-described embodiment, the lead wire of the winding 18a joined from both sides in the circumferential direction is curved toward the outer diameter side to form the curved portion 19b, but is curved toward the rotation axis direction. Thus, the curved portion 19b may be formed (not shown). In this case, the extending portion 19c extends in the direction of the rotation axis, and is coupled to each other by the neutral terminal N or the bus bars U, V, and W at the end portion.

  In addition, the bending portion 19b does not necessarily need to be configured by joining the routing portion 19a routed from one side in the circumferential direction and the other side in the circumferential direction. May be formed by bending toward the outside (outer diameter side).

DESCRIPTION OF SYMBOLS 10 Stator 12 Holder 12a Inner peripheral surface 14 Stator piece 16 Annular stator group 18 Coil 18a Winding 19a Leading part 19b Curved part 19c Extension part 19d Coupling part 22 Metal plate 24 Split core 24a York part 24b Magnetic pole part 26 Insulators 56a-62a , 56b to 62b Conductor end holding groove (accommodating portion)
64a, 64b body portions 66a-74a, 66b-74b wall portion 76 connecting portions 80a-86a, 80b-86b concave portions 88a-94a, 88b-94b convex portions 90 clips (fixing members)
92 cylindrical portion 92a air hole 92b inner surface (opposing surface)
94 Pressing part 96 Insulating member 96a Base part 96b Outer diameter side convex part 96c Inner diameter side convex part 98 Clamp member 99 Covers 100a to 106a, 100b to 106b Bottom surface N Neutral terminal (terminal member)
U, V, W Busbar (terminal member)

Claims (8)

A multi-phase winding;
An accommodating portion that accommodates the lead wire of the winding of each phase and is routed in the circumferential direction;
With
A stator of a rotating electrical machine in which a plurality of lead wires of the same phase or all phases are accommodated in the accommodating portion,
A plurality of lead lines of the same phase or all phases are:
A routing portion routed in the circumferential direction;
An extending portion extending from the predetermined portion in the circumferential direction of the routing portion toward the outside of the accommodating portion;
A curved portion connecting the routing portion and the extending portion;
In the extending portion, a coupling portion in which a plurality of lead wires are coupled to each other by a terminal member;
Have
A stator of a rotating electrical machine, wherein the bending portion includes a fixing member that presses a plurality of lead wires toward the inside of the housing portion. The fixing member is
A cylindrical portion that bundles a plurality of lead wires in the extending portion;
A pressing portion extending along the curved portion from the tubular portion toward the inside of the accommodating portion;
Have
The stator for a rotating electrical machine according to claim 1, wherein the pressing portion presses the curved portion toward the inside of the housing portion by plastically deforming the cylindrical portion. The bending portion is configured by joining the routing portion routed to one circumferential side and the routing portion routed to the other circumferential side,
The stator of a rotating electrical machine according to claim 2, wherein the pressing portion is provided on one side in the circumferential direction and the other side in the circumferential direction of the bending portion. The stator of the rotating electrical machine according to claim 2 or 3, wherein a width of the pressing portion is narrower than a width of the housing portion. An insulating member that secures insulation between the tubular portion and the extending portion is provided on a surface of the tubular portion that faces the extending portion,
The said pressing part is formed from the insulating material while extending along the said curved part toward the said accommodating part from the insulating member of the said cylindrical part, The any one of Claims 2-4 characterized by the above-mentioned. The stator of the rotary electric machine as described in 2. 6. The rotating electrical machine according to claim 5, wherein a surface of the cylindrical portion facing the extension portion that is not provided with the insulating member is separated from the extension portion. Stator. The said fixing member further has the convex part which presses the side surface of the said extension part and the said bending part toward the said accommodating part side from the said cylindrical part, The any one of Claims 2-5 characterized by the above-mentioned. The stator of the rotary electric machine described. The stator of a rotating electrical machine according to any one of claims 1 to 7, wherein the fixing member is covered with a cover formed of an insulating material.

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