JP2006025544A - Winding joining device of rotating electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a winding joining device that can weld three joining points with respect to a winding structure in which ends of six conductors that are aligned in a row are arranged in the radial direction of a stator core, and the joining points each composed of a pair of two conductor ends are arranged at three places along the radial direction of the stator core. <P>SOLUTION: As energizing electrodes for use in the winding joining device, there are provided third electrodes 7 each of which ensures continuity with the pair of ends composed of the third end 4c and the fourth end 4d. The third electrodes 7 move inside the radial direction passing through gaps between second electrodes 6 that are adjacent in the circumferential direction from the outside of the radial direction of the stator core, and each arrow-shaped insertion part 7a is inserted between the conductor ends that are adjacent in the circumferential direction. By this, sides of steps 7b formed at the arrow-shaped insertion parts 7a abut against circumferential sides of the third end 4c and the fourth end 4d, and sandwich the third end 4c and the fourth end 4d from both sides in the circumferential direction by cooperating with the third electrodes 7 that are adjacent in the circumferential direction, whereby the continuity between both the ends 4c, 4d is ensured. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a winding joining device for a rotating electrical machine including a stator winding configured by assembling a plurality of conductor segments into a stator core.

2. Description of the Related Art Conventionally, in a rotating electrical machine such as an AC generator, a segment-joint type stator winding formed by joining a plurality of conductor segments inserted into each slot of a stator core has been proposed.
The conductor segment is provided in, for example, a U-shape having two legs, and after inserting the two legs into different slots of the stator core, the end side protruding from the slot is the stator. Inclined in the circumferential direction of the iron core and assembled into a stator core.
Thereafter, two conductor segments separated by a predetermined slot pitch in the circumferential direction are taken as a set, and both ends adjacent to each other in the radial direction of the stator core are joined by welding or the like to form a stator winding. .

Further, for example, Patent Document 1 and Patent Document 2 are known as a method of joining the conductor segments forming the stator winding.
Patent Documents 1 and 2 describe a joining method in the case where four conductor segments are inserted into the same slot to form a stator winding. In this case, as shown in FIG. 7, four segment end portions are arranged in a line in the radial direction of the stator core. Here, the four segment end portions in the radial direction of the stator core are arranged in order from the radially inner side to the outer side, the first end portion 100, the second end portion 101, the third end portion 102, and the fourth end portion. 103, the first end portion 100 and the second end portion 101 are combined to form an inner end portion pair, and the third end portion 102 and the fourth end portion 103 are combined to form an outer end portion. Form a pair.

The inner end pair is formed by pressing the first end 100 radially outward by the inner electrode 104 disposed on the inner diameter side of the stator core, so that the first end 100 and the second end 101 are connected to each other. Contact is made and conduction is obtained. In this state, the first end 100 and the second end 101 are melted and joined by performing arc discharge by bringing the torch as a welding electrode close to the inner end pair.
Similarly, the outer end pair is formed by pressing the fourth end 103 radially inward by the outer electrode 105 disposed on the outer diameter side of the stator core, so that the third end 102 and the fourth end The part 103 is brought into contact with each other to establish conduction. In this state, the third end 102 and the fourth end 103 are melted and joined by performing arc discharge by bringing the torch closer to the outer end pair.

  Patent Document 3 and Patent Document 4 describe a joining method in the case where six conductor segments are inserted into the same slot to form a stator winding. In this case, end pairs each consisting of a pair of segment ends are arranged on three rows of concentric circles that differ in the radial direction of the stator core. Therefore, for the inner end pair disposed on the innermost concentric circle and the outer end pair disposed on the outermost concentric circle, the method shown in FIG. 7 (the inner electrode 104 and the outer electrode 105 is used). Can be applied to the end pair placed on the concentric circle in the middle, and the inner end pair and the outer end pair can interfere with each other and can be electrically connected by the electrode. Therefore, arc welding cannot be performed.

In contrast, Patent Documents 3 and 4 describe that the pair of end portions provided on the respective concentric circles are shifted in the circumferential direction. Accordingly, even with respect to the end pair arranged on the center concentric circle, conduction can be established by the electrode without being interrupted by the inner end pair and the outer end pair, and arc welding is possible. .
JP 2000-350421 A JP 2000-350422 A JP 2000-166150 A JP 2003-259612 A

The joining methods described in Patent Documents 1 and 2 are applicable to the case where four conductor segments are inserted into the same slot to form a stator winding, and the six conductor segments are inserted into the same slot. This is not applicable when forming a stator winding.
Further, the joining methods described in Patent Documents 3 and 4 can be applied to the case where six conductor segments are inserted into the same slot to form a stator winding, but are provided on three rows of concentric circles. It is necessary to shift the position of each end pair to be circumferentially shifted. For this reason, there is a problem that it cannot be applied when the six segment end portions are arranged in a line in the radial direction of the stator core.

  The present invention has been made on the basis of the above circumstances. The purpose of the present invention is to insert two conductor segments into a single row in the same slot of the stator core, thereby forming a pair of segment ends. An object of the present invention is to provide a winding joining device for a rotating electrical machine capable of welding the three joint portions to a winding structure in which the joint portions are provided at three locations along the radial direction of the stator core.

(Invention of Claim 1)
The present invention is provided with six conductor end portions that protrude from the slots of the stator core and are arranged in a line in the radial direction of the stator core, and the six conductor end portions are equidistant in the circumferential direction of the stator core. In a rotating electrical machine having a plurality of winding structures arranged, a first end portion and a second end portion, a third end portion and a fourth end portion of six conductor end portions in order from the radially inner side to the outer side of the stator core. The end portion, and the fifth end portion and the sixth end portion respectively form an end portion pair that becomes a joint location, and between the second end portion and the third end portion and between the fourth end portion and the fifth end portion. A winding joining device of a rotating electrical machine that forms a stator winding by joining the pair of end portions in a state where a predetermined gap is secured between the pair of portions. It is provided with a current-carrying electrode used in the above.

  The electrode is disposed on the inner diameter side of the stator core and is movable in the radial direction, and presses the first end portion radially outward from the inner diameter side to bring the first end portion into contact with the second end portion. Thus, the first electrode that secures continuity between the first end and the second end, and the outer end of the stator core are arranged and movable in the radial direction, and the sixth end is moved from the outer diameter side. The second electrode that secures electrical connection between the fifth end and the sixth end by pressing the inner end in the radial direction to bring the sixth end into contact with the fifth end, and the circumferential direction of the stator core A third electrode that is inserted between adjacent conductor end portions and secures conduction between the third end portion and the fourth end portion by sandwiching the third end portion and the fourth end portion from both sides in the circumferential direction; It is characterized by having.

  According to the above configuration, the first electrode secures electrical continuity with the first end and the second end, the second electrode secures electrical continuity with the fifth end and the sixth end, The third electrode secures conduction between the third end portion and the fourth end portion. Thereby, even in the winding structure in which the six conductor end portions are arranged in a line in the radial direction of the stator core, the end pair formed by the first end portion and the second end portion, and the fifth end portion, Needless to say, welding can be performed on the pair of ends formed with the sixth end, and the pair of ends formed with the third end and the fourth end without being obstructed by the pair of ends. Can be welded to.

(Invention of Claim 2)
In the winding joining apparatus for a rotating electrical machine according to claim 1, the third electrode moves along the radial direction of the stator core, and moves radially inward from the outer diameter side of the stator core. It is inserted between the end portions of conductors adjacent in the circumferential direction.
The rotating electrical machine of the present invention has a winding structure in which the six conductor end portions are arranged in a line in the radial direction of the stator core, so that a predetermined gap is provided between the six conductor end portions adjacent in the circumferential direction. Is secured. Therefore, it is possible to move the third electrode along the radial direction using the predetermined gap. As a result, the third electrode can be moved radially inward from the outer diameter side of the stator core and inserted between adjacent conductor end portions in the circumferential direction.

(Invention of Claim 3)
In the winding joining apparatus for a rotating electrical machine according to claim 2, the third electrode is movable in conjunction with the movement of the second electrode.
Since both the second electrode and the third electrode move along the radial direction of the stator core, the third electrode can be moved in conjunction with the movement of the second electrode.

(Invention of Claim 4)
The winding joining apparatus for a rotating electrical machine according to claim 1, wherein the third electrode moves along the axial direction from above the stator core provided with the conductor end portion, thereby adjacent conductor ends in the circumferential direction. It is inserted between parts.
The rotating electrical machine of the present invention has a winding structure in which the six conductor end portions are arranged in a line in the radial direction of the stator core, so that a predetermined gap is secured between the conductor end portions adjacent in the circumferential direction. ing. Therefore, it is possible to move the third electrode along the axial direction using the predetermined gap. Accordingly, the third electrode can be moved in the axial direction from above the stator core provided with the conductor end portion, and the third electrode can be inserted between the conductor end portions adjacent in the circumferential direction.

(Invention of Claim 5)
The winding joining apparatus for a rotating electrical machine according to claim 1, wherein the third electrode is movable along a radial direction and an axial direction of the stator core.
In this configuration, for example, the third electrode is moved in the axial direction of the stator core and inserted between adjacent conductor end portions in the circumferential direction, and an end portion formed by the third end portion and the fourth end portion is formed. After welding to the pair, the stator core can be moved so as to be drawn outward in the radial direction. Alternatively, the reverse operation is also possible. That is, the third electrode is moved inward in the radial direction from the outer diameter side of the stator core and inserted between adjacent conductor end portions in the circumferential direction, and an end formed by the third end portion and the fourth end portion After welding to the pair, it can be moved so as to be pulled up in the axial direction of the stator core.

(Invention of Claim 6)
The winding joining apparatus for a rotating electrical machine according to any one of claims 1 to 5, wherein the third electrode is inserted between the end portions of the conductors adjacent in the circumferential direction, from the outer diameter side to the inner diameter side of the stator core. And a stepped portion projecting in the circumferential direction is provided on one side of the arrow-shaped insertion portion, and the stepped portions are provided at the third end portion and the fourth end portion. By contacting the side surface in the circumferential direction, conduction with both ends is ensured.
According to this configuration, the stepped portion provided in the arrow-shaped insertion portion can reliably establish conduction with the third end portion and the fourth end portion.

(Invention of Claim 7)
The winding joining apparatus for a rotating electric machine according to any one of claims 1 to 6, further comprising a holder that abuts the third end and the fourth end in the radial direction.
Since the third end portion and the fourth end portion are brought into contact with each other in the radial direction by this holding tool, it is possible to prevent a gap from being formed between them, so that reliable welding can be performed.

(Invention of Claim 8)
The winding joining apparatus for a rotating electrical machine according to claim 7, wherein the holder has an inner insertion portion that is inserted between the second end portion and the third end portion, and the first insertion portion is inserted through the inner insertion portion. By pressing the three end portions against the fourth end portion, both end portions are brought into contact with each other in the radial direction.
Thereby, in the state which contact | abutted the 3rd end part and the 4th end part to radial direction, since conduction | electrical_connection with both ends can be ensured by a 3rd electrode, in a 3rd end part and a 4th end part, Reliable welding can be performed on the formed end portion pair.

(Invention of Claim 9)
The winding joining apparatus for a rotating electrical machine according to claim 7, wherein the holder has an outer insertion portion inserted between the fourth end portion and the fifth end portion, and the second insertion portion is inserted through the outer insertion portion. By pressing the four end portions against the third end portion, both end portions are brought into contact with each other in the radial direction.
Thereby, in the state which contact | abutted the 3rd end part and the 4th end part to radial direction, since conduction | electrical_connection with both ends can be ensured by a 3rd electrode, in a 3rd end part and a 4th end part, Reliable welding can be performed on the formed end portion pair.

(Invention of Claim 10)
The winding joining apparatus for a rotating electrical machine according to claim 7, wherein the holder includes an inner insertion portion inserted between the second end portion and the third end portion, a fourth end portion, and a fifth end portion. And inserting the third end portion and the fourth end portion in the radial direction between the inner insertion portion and the outer insertion portion, thereby bringing the both end portions into contact with each other in the radial direction. It is characterized by that.
Thereby, in the state which contact | abutted the 3rd end part and the 4th end part to radial direction, since conduction | electrical_connection with both ends can be ensured by a 3rd electrode, in a 3rd end part and a 4th end part, Reliable welding can be performed on the formed end portion pair.

(Invention of Claim 11)
The winding joining apparatus for a rotating electrical machine according to any one of claims 7, 8, and 10, wherein a first end and a second end are provided between an inner insertion portion provided in the holder and the first electrode. It is characterized by sandwiching them and bringing them into contact with each other.
In this configuration, not only the third end portion and the fourth end portion are brought into contact with each other in the radial direction by the holder, but also the first electrode is interposed between the first electrode and the inner insertion portion using the holder. By sandwiching the end portion and the second end portion, the first end portion and the second end portion can be reliably brought into contact with each other.

(Invention of Claim 12)
The winding joining apparatus for a rotating electric machine according to any one of claims 7, 9, and 10, wherein a fifth end and a sixth end are provided between an outer insertion portion provided in the holder and the second electrode. It is characterized by sandwiching them and bringing them into contact with each other.
In this configuration, not only the third end portion and the fourth end portion are brought into contact with each other in the radial direction by the holder, but also the fifth electrode is interposed between the second electrode and the outer insertion portion using the holder. By sandwiching the end portion and the sixth end portion, the fifth end portion and the sixth end portion can be reliably brought into contact with each other.

  The best mode for carrying out the present invention will be described in detail by the following examples. In one aspect, the features of the present invention can be grasped as a winding joining device for a rotating electrical machine including a stator winding configured by assembling a plurality of conductor segments into a stator core. This winding joining apparatus is used in a method for manufacturing a rotating electrical machine, more specifically, a method for manufacturing a stator. Therefore, the feature of the present invention is grasped as a manufacturing method of a rotating electrical machine or a manufacturing method of a stator.

FIG. 1 is a plan view showing electrodes used in a winding joining device of a rotating electrical machine and joining portions of stator windings welded through the electrodes.
An example of the rotating electrical machine of the present invention is a vehicle AC generator.
The stator of this vehicle alternator includes a segment-junction type stator winding constituted by assembling a plurality of conductor segments 2 (see FIG. 4) on a cylindrical stator core 1 (see FIG. 3). It is used.
Slots 3 are recessed along the axial direction on the inner peripheral side of the stator core 1, and a plurality of slots 3 are provided at equal pitches in the circumferential direction of the stator core 1 (see FIG. 3).

For example, as shown in FIG. 4, the conductor segment 2 is provided in a U-shape. After the two straight portions 2 a are moved relative to each other in the direction of the arrow shown in FIG. Are inserted into different slots 3 and assembled into the stator core 1.
As shown in FIG. 3, the straight portions 2 a of the six conductor segments 2 are inserted in a line in the same slot 3 of the stator core 1, and the end portions of the conductor segments 2 protruding from the slot 3 are the other. A pair of end portions serving as joint portions of the stator windings are formed adjacent to the end portions of the conductor segments 2 protruding from the slots 3 in the radial direction. However, as shown in FIG. 5, the end side of the conductor segment 2 protruding from the slot 3 has an inclined portion 2b extending obliquely from the slot position in the circumferential direction of the stator core 1, and this inclined portion 2b. The tip end side is bent in the axial direction to form the conductor end 4 of the present invention.

The end pair is provided at a plurality of positions in the circumferential direction of the stator core 1 at an equal pitch, and is provided at three locations with predetermined gaps also in the radial direction of the stator core 1 (see FIG. 5). ). That is, in the radial direction of the stator core 1, six conductor end portions 4 are arranged in a line, and two adjacent pairs form an end pair.
Here, the six conductor end portions 4 arranged in the radial direction of the stator core 1 are arranged in order from the radially inner side to the outer side of the stator core 1 in the first end portion 4a, the second end portion 4b, and the third end portion. When referred to as an end 4c, a fourth end 4d, a fifth end 4e, and a sixth end 4f, the first end 4a and the second end 4b, the third end 4c and the fourth end 4d, and The fifth end portion 4e and the sixth end portion 4f form the above-described end portion pairs, and are located between the second end portion 4b and the third end portion 4c, and between the fourth end portion 4d and the fifth end portion. A predetermined gap is secured between each portion 4e (see FIG. 5).

The winding joining apparatus of the present invention is an apparatus for welding (for example, arc welding) the above-described end portion pair, and includes an energizing electrode described below.
As shown in FIG. 1, the energization electrode includes a first electrode 5 that secures conduction between an end pair formed by the first end 4 a and the second end 4 b, and a fifth end 4 e. And the end pair formed by the third end portion 4c and the fourth end portion 4d, and the end portion pair formed by the third end portion 4c and the fourth end portion 4d. And a third electrode 7 to be secured. The first electrode 5, the second electrode 6, and the third electrode 7 are plural in the circumferential direction corresponding to each pair of end portions provided at a plurality of positions in the circumferential direction of the stator core 1 at an equal pitch. It is provided one by one.

  The first electrode 5 is disposed on the inner diameter side of the stator core 1 and is movable in the radial direction, and presses the first end portion 4a radially outward from the inner diameter side (in the direction of the arrow a in the drawing), By bringing the end portion 4a into contact with the second end portion 4b, conduction with both end portions 4a and 4b is secured. However, the pressing force of the first electrode 5 against the first end 4a is not large enough to move the second end 4b toward the third end 4c via the first end 4a. The gap between the second end 4b and the third end 4c does not disappear.

  The second electrode 6 is arranged on the outer diameter side of the stator core 1 and is movable in the radial direction, and presses the sixth end portion 4f radially inward (in the direction of the arrow b in the drawing) from the outer diameter side, By bringing the sixth end portion 4f into contact with the fifth end portion 4e, conduction with both end portions 4e and 4f is ensured. However, the pressing force of the second electrode 6 against the sixth end 4f is not so large as to move the fifth end 4e toward the fourth end 4d via the sixth end 4f. The gap between the 5 end portion 4e and the fourth end portion 4d does not disappear.

  As shown in FIG. 2A, the third electrode 7 is provided in a long plate shape, and has an arrow-shaped insertion portion 7a whose one end is tapered, and is formed on one side of the arrow-shaped insertion portion 7a. A trapezoidal stepped portion 7b protruding in the width direction (upward in the figure) is provided. This stepped portion 7b has a predetermined length along the longitudinal direction of the arrow-shaped insertion portion 7a (the left-right direction in FIG. 2), and is a radial length that combines the third end 4c and the fourth end 4d. It is a little longer than that. Further, the third electrode 7 is arranged so that the arrow-shaped insertion portion 7a does not hit the insulating film of each conductor segment 2, in other words, the side surface of the stepped portion 7b is the periphery of the third end portion 4c and the fourth end portion 4d. The thickness of the arrow-shaped insertion portion 7a is thinner than other portions so that the direction side surface can be reliably contacted (see FIG. 2B).

  The third electrode 7 is arranged on the outer diameter side of the stator core 1 and is movable in the radial direction, and passes between the second electrodes 6 adjacent in the circumferential direction as indicated by an arrow c in FIG. The arrow-shaped insertion portion 7a is inserted between the conductor end portions 4 adjacent in the circumferential direction. Thereby, while the side surface of the stepped part 7b provided in the arrow-shaped insertion part 7a contact | abuts to the circumferential direction side surface of the 3rd end part 4c and the 4th end part 4d, the 3rd end part 4c and the 4th end part In cooperation with other third electrodes 7 that are adjacent to each other in the circumferential direction across 4d, the third end 4c and the fourth end 4d are sandwiched from both sides in the circumferential direction, thereby connecting the both ends 4c and 4d. Is secured.

The third electrode 7 can be moved independently without being interlocked with the second electrode 6, but is arranged on the outer diameter side of the stator core 1 in the same manner as the second electrode 6. Since it is movable in the direction, it is possible to adopt a configuration in which the second electrode 6 is movable in conjunction with the movement of the second electrode 6.
After the first to third electrodes 5, 6, 7 ensure electrical continuity with each end pair, the process proceeds to a welding process, and welding to each end pair is performed. As a welding method, for example, arc welding, plasma welding, laser welding, resistance welding or the like can be employed.

(Effect of Example 1)
According to the winding bonding apparatus described in the first embodiment, the first electrode 5 ensures conduction between the pair of end portions formed by the first end portion 4a and the second end portion 4b, and the second electrode. 6, the conduction between the pair of ends formed by the fifth end portion 4e and the sixth end portion 4f is ensured, and the third electrode 7 is formed by the third end portion 4c and the fourth end portion 4d. Conduction with the end pair is ensured. Thus, even in the winding structure in which the six conductor end portions 4 are arranged in a line in the radial direction of the stator core 1, the end pair formed by the first end portion 4a and the second end portion 4b and the fifth end Needless to say, welding can be performed on the pair of ends formed by the end 4e and the sixth end 4f, respectively. The third end 4c and the fourth end are not obstructed by the pair of ends. It is possible to perform welding to the end portion pair formed by the end portion 4d.

In the stator winding composed of a plurality of conductor segments 2, six conductor end portions 4 are arranged in a line in the radial direction of the stator core 1, and the six conductor end portions 4 are fixed. A plurality of winding structures are arranged in the circumferential direction of the core 1 at an equal pitch. That is, a predetermined gap is secured between the conductor end portions 4 adjacent in the circumferential direction along the radial direction of the stator core 1. Therefore, the third electrode 7 (arrow-shaped insertion portion 7a) can be inserted between the conductor end 4 and the conductor end 4 adjacent in the circumferential direction by using the predetermined gap.
The third electrode 7 can be moved in conjunction with the movement of the second electrode 6.

  Since the third electrode 7 is provided with a stepped portion 7b on one side of the arrow-shaped insertion portion 7a, the stepped portion 7b is securely attached to the side surfaces of the third end 4c and the fourth end 4d. It can be made to contact. That is, as shown in FIG. 1, in the state where the side surface of the stepped portion 7b is in contact with the side surfaces of the third end portion 4c and the fourth end portion 4d, the arrow-shaped insertion portion 7a and the other conductor end portion 4 (first Since gaps are respectively formed between the end 4a, the second end 4b, the fifth end 4e, and the sixth end 4f), the stepped portion 7b, the third end 4c, and the fourth end 4d Contact is ensured. As a result, conduction between the third end 4c and the fourth end 4d by the third electrode 7 is ensured, so that an end pair formed by the third end 4c and the fourth end 4d. Can prevent welding defects.

FIG. 6 is a side view showing the holder 8, the conductor end 4, and the first to third electrodes 5 to 7.
The second embodiment is an example in which the holding tool 8 for bringing the third end 4c and the fourth end 4d into contact in the radial direction is used.
The holder 8 moves in the axial direction as indicated by an arrow d from above in FIG. 6 and is inserted into the gap between the second end 4b and the third end 4c. The outer insertion portion 8b is inserted into the gap between the end portion 4d and the fifth end portion 4e, and the third end portion 4c and the fourth end portion 4d are formed with the inner insertion portion 8a and the outer insertion portion 8b. By sandwiching in the direction, both end portions 4c and 4d can be brought into contact in the radial direction.

In a state where the third end 4c and the fourth end 4d are sandwiched in the radial direction by the holder 8, the third end 4c and the fourth end using the third electrode 7 described in the first embodiment. By ensuring the continuity with 4d, it is possible to prevent a gap from being generated between the third end 4c and the fourth end 4d during welding, so that reliable welding can be performed.
In the above description, the inner end 8a and the outer end 8b are configured to sandwich the third end 4c and the fourth end 4d in the radial direction. The both ends 4c and 4d may be brought into contact with each other in the radial direction by moving 8 to the right in the figure and pressing the third end 4c against the fourth end 4d via the inner insertion portion 8a. Alternatively, the holder 8 is moved to the left in the figure, and the fourth end 4d is pressed against the third end 4c via the outer insertion portion 8b, thereby bringing the both ends 4c and 4d into contact with each other in the radial direction. Also good. In these cases, the outer insertion portion 8b or the inner insertion portion 8a can be eliminated.

  Moreover, the 1st end part 4a and the 2nd end part 4b can also be contact | abutted using the holder 8 of a present Example, and the 1st electrode 5 described in Example 1. FIG. That is, it is possible to sandwich the first end 4 a and the second end 4 b between the inner insertion portion 8 a provided in the holder 8 and the first electrode 5, so that both are brought into contact with each other. In this case, since the first end 4a and the second end 4b are sandwiched from both sides in the radial direction, only the first end 4a is pressed against the second end 4b as described in the first embodiment. In this case, both end portions 4a and 4b can be brought into contact with each other more reliably.

  Similarly, the fifth end 4e and the sixth end 4f can be brought into contact with each other using the holder 8 and the second electrode 6 described in the first embodiment. In other words, the fifth end 4e and the sixth end 4f can be sandwiched between the outer insertion portion 8b provided on the holder 8 and the second electrode 6 so that they can come into contact with each other. Also in this case, since the fifth end portion 4e and the sixth end portion 4f are sandwiched from both sides in the radial direction, the sixth end portion 4f is pressed against the fifth end portion 4e as described in the first embodiment. As a result, both end portions 4e and 4f can be brought into contact with each other more reliably.

(Modification)
In the first embodiment, the third electrode 7 is configured to move in the radial direction of the stator core 1, but may be configured to move along the axial direction of the stator core 1, for example. That is, the third electrode 7 can be moved along the axial direction of the stator core 1 and inserted so as to be interrupted between the conductor end 4 and the conductor end 4 adjacent in the circumferential direction. Alternatively, it is also possible to combine radial movement and axial movement.

It is a top view which shows the electrode for electricity used for the coil | winding joining apparatus of the rotary electric machine concerning Example 1, and the joining location of the stator coil | winding welded through this electrode. 4A is a plan view of a third electrode according to Example 1, and FIG. FIG. 3 is a partial cross-sectional view showing a slot portion of the stator core according to the first embodiment. 3 is a perspective view of a conductor segment according to Example 1. FIG. FIG. 3 is a perspective view showing an end structure of a stator winding according to the first embodiment. It is a side view which shows the holder concerning Example 2, a conductor edge part, and an electrode. It is a top view which shows the electrode for electricity supply concerning a prior art, and the junction location of the stator coil | winding welded through this electrode.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stator iron core 3 Slot 4 Conductor edge part 4a 1st edge part 4b 2nd edge part 4c 3rd edge part 4d 4th edge part 4e 5th edge part 4f 6th edge part 5 1st electrode (electrode for electricity supply) )
6 Second electrode (electrode for energization)
7 Third electrode (electrode for energization)
7a Arrow insertion part 7b Stepped part 8 Holder 8a Inner insertion part 8b Outer insertion part

Claims (12)

Six conductor end portions protruding from the stator core slots and arranged in a line in the radial direction of the stator core are provided, and a plurality of the six conductor end portions are arranged at a constant pitch in the circumferential direction of the stator core. In a rotating electrical machine having an arrayed winding structure,
The six conductor end portions are arranged in order from the radially inner side to the outer side of the stator core in the order of a first end portion, a second end portion, a third end portion, a fourth end portion, a fifth end portion, and a sixth end portion. When calling the end,
The first end portion and the second end portion, the third end portion and the fourth end portion, and the fifth end portion and the sixth end portion form an end pair that becomes a joint location, respectively. In addition, the end pairs are joined in a state where a predetermined gap is secured between the second end portion and the third end portion and between the fourth end portion and the fifth end portion, respectively. A winding joining device for a rotating electrical machine that forms a stator winding,
Comprising an electrode for energization used when joining the end pair,
The electrode is arranged on the inner diameter side of the stator core and is movable in the radial direction, and the first end portion is pressed radially outward from the inner diameter side so that the first end portion becomes the second end portion. A first electrode that ensures electrical connection between the first end and the second end by contacting the first end; and
It is arranged on the outer diameter side of the stator core and is movable in the radial direction, and the sixth end is pressed against the fifth end by pressing the sixth end inward from the outer diameter side. A second electrode that ensures electrical continuity with the fifth end and the sixth end;
The third end portion and the fourth end are inserted between the conductor end portions adjacent to each other in the circumferential direction of the stator core and sandwich the third end portion and the fourth end portion from both sides in the circumferential direction. And a third electrode for ensuring electrical continuity with the part. In the winding bonding apparatus for a rotating electric machine according to claim 1,
The third electrode is movable along the radial direction of the stator core, and moved inward in the radial direction from the outer diameter side of the stator core, thereby being inserted between the conductor end portions adjacent in the circumferential direction. A winding joining apparatus for a rotating electrical machine. In the winding bonding apparatus for a rotating electric machine according to claim 2,
The winding joining apparatus for a rotating electrical machine, wherein the third electrode moves in conjunction with the movement of the second electrode. In the winding bonding apparatus for a rotating electric machine according to claim 1,
The third electrode is inserted between the conductor end portions adjacent to each other in the circumferential direction by moving along the axial direction from above the stator core provided with the conductor end portions. Winding joining device for rotating electrical machines. In the winding bonding apparatus for a rotating electric machine according to claim 1,
The said 3rd electrode is movable along the radial direction and axial direction of the said stator core, The winding joining apparatus of the rotary electric machine characterized by the above-mentioned. In the winding joining device of any one of the rotating electrical machines according to claims 1 to 5,
The third electrode is inserted between the conductor end portions adjacent to each other in the circumferential direction, and has a sagittal insertion portion that tapers from the outer diameter side to the inner diameter side of the stator core. A stepped portion projecting in the circumferential direction is provided on one side of the portion, and the stepped portion abuts on the circumferential side surfaces of the third end portion and the fourth end portion, thereby providing conduction to both end portions. A winding joining apparatus for a rotating electrical machine, characterized by securing. In the winding joining apparatus for a rotating electric machine according to any one of claims 1 to 6,
A winding joining apparatus for a rotating electrical machine, comprising: a holder that makes the third end and the fourth end abut in a radial direction. In the winding joining apparatus for a rotating electrical machine according to claim 7,
The holder has an inner insertion portion that is inserted between the second end portion and the third end portion, and presses the third end portion against the fourth end portion through the inner insertion portion. Thus, the winding joining device for a rotating electrical machine, wherein both ends are brought into contact with each other in the radial direction. In the winding joining apparatus for a rotating electrical machine according to claim 7,
The holder has an outer insertion portion that is inserted between the fourth end portion and the fifth end portion, and presses the fourth end portion against the third end portion through the outer insertion portion. Thus, the winding joining device for a rotating electrical machine, wherein both ends are brought into contact with each other in the radial direction. In the winding joining apparatus for a rotating electrical machine according to claim 7,
The holder includes an inner insertion portion that is inserted between the second end portion and the third end portion, and an outer insertion portion that is inserted between the fourth end portion and the fifth end portion. The rotation is characterized in that both ends are brought into contact with each other in the radial direction by sandwiching the third end portion and the fourth end portion in the radial direction between the inner insertion portion and the outer insertion portion. Electric wire winding equipment. In the winding joining apparatus for a rotating electric machine according to any one of claims 7, 8, and 10,
A winding of a rotating electrical machine characterized in that the first end and the second end are sandwiched between the inner insertion portion provided in the holder and the first electrode, and both are brought into contact with each other. Wire bonding equipment. In the winding joining device for a rotating electric machine according to any one of claims 7, 9, and 10,
The winding of the rotating electrical machine, wherein the fifth end portion and the sixth end portion are sandwiched between the outer insertion portion provided in the holder and the second electrode, and both are brought into contact with each other. Wire bonding equipment.

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