JP2012205481A - Inserting method and inserting jig of coil conductor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inserting method and an inserting jig of a coil conductor capable of promptly and stably pushing in the coil conductor from both sides in an axial direction of a stator core.SOLUTION: A pair of jig guide portions 22 is inserted and disposed in an inner periphery of a stator core 71. On outer peripheries of the pair of the jig guide portions 22, at a position on the stator core 71 which is inserted into each slot 72 from the outside in an axial direction L, jig rods 3 and coil conductors 8 are alternately superimposed one by one in a diametrical direction R. To an axial direction intermediate position of each slot 72, each jig rod 3 and each coil conductor 8 are inserted together from both sides in the axial direction L. Each coil conductor 8A positioned on one side in the axial direction is inserted in each slot 72 while pushing back each jig rod 3 positioned on the other side in the axial direction, and a coil conductor 8B positioned on the other side in the axial direction is inserted in each slot 72 while pushing back each jig rod 3 positioned on one side in the axial direction.

Description

  The present invention relates to a method and jig for inserting a coil conductor into a stator core of a rotating electrical machine.

In manufacturing a stator for a rotating electrical machine, in order to increase the occupied area of the coil conductor in each slot of the stator core, for example, as shown in the stator of Patent Document 1, a coil conductor having a rectangular wire with a substantially rectangular cross section. Is placed in the slot.
When manufacturing a stator using this flat wire, the coil conductor is formed into a wave winding shape in which the conductor portions arranged in the slots are alternately connected in the circumferential direction on one axial side and the other axial side. This coil conductor is arranged from the inner peripheral side of the slot. In addition to this, with respect to the wave-shaped coil conductor, a plurality of divided cores obtained by dividing the stator core according to the number of slots formed are arranged from the outer peripheral side, and the coil conductor is arranged in the slot. It is considered to form.

  Further, for example, in the stator coil manufacturing method of Patent Document 2, it is disclosed that coil conductors are inserted from both axial sides of each slot of the stator core. Moreover, in patent document 2, the front-end | tip of the coil conductor located in the axial direction one side and the front-end | tip of the coil conductor located in the other axial direction are mutually abutted, and coil conductors are joined.

JP 2009-291050 A JP 2009-194999 A

However, in Patent Document 2, it is necessary to divide the stator core into two in the axial direction, and the coil tips must be joined between the divided stator cores. And after joining the tips of the coils, the divided stator cores must be integrated. Moreover, in patent document 1, it takes time to arrange | position a wave winding-shaped coil conductor with respect to a stator core, and productivity is not excellent.
Therefore, in order to arrange | position a coil rapidly with respect to the stator core which is not divided | segmented, the further device is required.

  The present invention has been made in view of such conventional problems, and intends to provide a coil conductor insertion method and an insertion jig that can quickly and stably push the coil conductor from both axial sides of the stator core. Is.

According to a first aspect of the present invention, a plurality of coil conductors inserted from one side in the axial direction of a plurality of slots in the stator core and a plurality of coil conductors inserted from the other side in the axial direction are provided in the radial direction of each of the slots. It is a method of arranging one by one alternately,
A pair of jig guide portions that protrude from both axial end surfaces of the stator core and are arranged on the stator core, and a plurality of jig rods that are arranged radially along the axial direction on the outer periphery of the pair of jig guide portions; , And
The pair of jig guide portions are arranged on the stator core,
On the outer periphery of the pair of jig guide portions, the jig rods and the coil conductors are alternately stacked one on the other in the radial direction at positions inserted into the slots of the stator core from the outside in the axial direction,
Next, the jig rods and the coil conductors are inserted together from both sides in the axial direction to the intermediate position in the axial direction of the slots,
Next, the coil conductors positioned on one side in the axial direction are inserted into the slots while pushing back the jig rods positioned on the other side in the axial direction, and the coil conductors positioned on the other side in the axial direction are The coil conductor insertion method is characterized in that each jig rod located on one side in the axial direction is inserted into each slot while pushing back (claim 1).

According to a second aspect of the present invention, a plurality of coil conductors inserted from one side in the axial direction of a plurality of slots in the stator core and a plurality of coil conductors inserted from the other side in the axial direction are provided in the radial direction of each slot. It is a jig for arranging one by one alternately,
A pair of jig guide portions that protrude from both axial end surfaces of the stator core and are disposed on the stator core; and
On the outer periphery of the pair of jig guide portions, a large number of guide protrusions arranged radially at positions facing the teeth portions between the slots of the stator core from the outside in the axial direction;
A pair of jig sliding parts arranged so as to be slidable in the axial direction on the outer periphery of the pair of jig guide parts,
In the pair of jig sliding portions, the coil conductors are arranged at positions where they are inserted into the slots from the outside in the axial direction while being guided by the guide protrusions and slidable in the axial direction. A large number of jig rods arranged radially in the radial direction,
A pair of jig pushing portions arranged on the outside in the axial direction with respect to the pair of jig sliding portions, and for pushing the jig rods into the slots from the outside in the axial direction,
The plurality of jig rods arranged in the radial direction on one side in the axial direction and the plurality of jig rods arranged in the radial direction on the other side in the axial direction are in a state where the radial positions are shifted from each other. It is inserted through the rod insertion hole formed in the sliding part,
The pair of jig sliding portions and the pair of jig pushing portions are slid on the outer circumferences of the pair of jig guide portions so as to be close to the stator core until the axially intermediate positions of the slots are reached. The jig rods and the coil conductors are pushed together from both sides in the axial direction, and then only the pair of jig sliding parts are slid, and the coil conductors located on one side in the axial direction While pushing back each jig rod located on the other side in the axial direction to the outside of each slot, each coil conductor located on the one side in the axial direction is pushed into each slot, and each of the positions located on the other side in the axial direction. The coil conductor pushes each coil conductor located on the other side in the axial direction into each slot while pushing back each jig rod located on the one side in the axial direction to the outside of each slot. In insertion jig of the coil conductor, characterized in that are configured as (claim 3).

According to a first aspect of the present invention, there is provided a coil conductor insertion method in which a plurality of coil conductors divided by a unit arranged in each slot of a stator core are radially arranged from one axial side and the other axial side with respect to each slot. This is a method of inserting one by one alternately.
In the present invention, first, a pair of jig guide portions are arranged on the stator core. Further, on the outer periphery of the pair of jig guide portions, the jig rods and the coil conductors are alternately stacked one on the other in the radial direction at positions where they are inserted into the slots of the stator core from the outside in the axial direction.

Next, the jig rods and the coil conductors that are alternately overlapped in the radial direction are inserted from both sides in the axial direction to the intermediate position in the axial direction of each slot. At this time, each coil conductor can be stably inserted into each slot by being inserted into each slot together with each jig rod.
When the jig rods and the coil conductors are inserted from both sides in the axial direction of the slots, the tips of the coil conductors located on one side in the axial direction of the jig rods located on the other side in the axial direction The tip of each coil conductor that is in contact with the tip and located on the other side in the axial direction comes into contact with the tip of each jig rod that is located on one side in the axial direction. In this state, when each coil conductor is pushed into each slot from both sides in the axial direction, each jig rod located on the other side in the axial direction is pushed back to the outside of the slot by each coil conductor located on one side in the axial direction. Each jig rod located on one side in the direction is pushed back to the outside of the slot by each coil conductor located on the other side in the axial direction.

  Thus, in the present invention, by using the jig rod, it is possible to quickly and stably arrange the coil conductors in the radial direction of each slot by pushing the coil conductors from both axial sides of the stator core. it can. Further, each coil conductor can be arranged in each slot without dividing the stator core.

In the coil conductor insertion jig according to the second aspect of the present invention, a plurality of guide protrusions are provided radially on the outer periphery of the pair of jig guide portions, and the jig rods are arranged alternately with the coil conductors one by one in the radial direction. Is arranged with respect to a pair of jig sliding parts arranged on the outer periphery of the pair of jig guide parts. Moreover, a pair of jig | tool pushing parts are arrange | positioned on the axial direction outer side with respect to a pair of jig | tool sliding parts.
Then, by the operation of sliding the pair of jig sliding portions and the pair of jig pushing portions with respect to the jig guide portion, as in the case of the first invention, quickly and stably, Coil conductors can be arranged in the radial direction. Further, each coil conductor can be arranged in each slot without dividing the stator core.

  As described above, according to the present invention, it is possible to provide a coil conductor insertion method and an insertion jig that can quickly and stably push the coil conductor from both axial sides of the stator core.

The perspective view which shows the state which inserts each coil conductor in each slot of a stator core concerning an Example. Sectional drawing which shows the whole coil conductor insertion jig concerning an Example. Sectional drawing which expands and shows the part of the axial direction one side of the coil conductor insertion jig | tool concerning an Example. Sectional drawing which expands and shows the part of the other side of the axial direction of the coil conductor insertion jig | tool concerning an Example. Sectional drawing which shows the whole coil conductor insertion jig | tool of the state which pushed in each coil conductor to the axial direction intermediate position of each slot concerning an Example. It is sectional drawing which expands and shows a part of FIG. 5 concerning an Example. It is sectional drawing which expands and shows the state which each coil conductor pushes back each jig | tool rod to the exterior of each slot concerning an Example. The perspective view which shows the state which inserted each coil conductor in each slot of the stator core concerning an Example. Sectional drawing which shows the state which inserted each coil conductor in each slot of the stator core concerning an Example. Sectional drawing which expands and shows a part of FIG. 9 concerning an Example. Explanatory drawing which shows the jig | tool sliding part which slides the outer periphery of a jig | tool guide part concerning an Example in the state seen from the axial direction. Explanatory drawing which shows the state which looked at the jig | rod rod and coil conductor which were inserted in each slot of the stator core concerning an Example from the axial direction. The perspective view which shows the stator manufactured by the insertion method of a coil conductor concerning an Example. Sectional drawing which shows the stator manufactured by the insertion method of a coil conductor concerning an Example. Explanatory drawing which expands and shows a part of stator concerning an Example in the state seen from the axial direction.

A preferred embodiment of the above-described coil conductor insertion method and insertion jig according to the present invention will be described.
In the first invention, the coil conductor has a substantially quadrangular cross section, a linear shape portion along the axial direction of the slot, and a bent shape portion bent in the circumferential direction from one end of the linear shape portion. And the tip of the linearly shaped portion of the coil conductor inserted into the slot from one side in the axial direction and the bent portion of the coil conductor inserted into the slot from the other side in the axial direction. Joining the rear end portion and bending the shape of the coil conductor inserted into the slot from one end in the axial direction and the tip of the linear shape portion of the coil conductor inserted into the slot from the other side in the axial direction It is preferable that a coil connected in a wave-like shape in the circumferential direction of the stator core is formed by joining the rear end portion of the portion (Claim 2).
In this case, the coil conductors arranged in the stator core can be joined to each other to form a coil connected in a wave shape. Therefore, the stator in which the wave-like coils are arranged can be formed quickly and stably.

Embodiments of the coil conductor insertion method and insertion jig according to the present invention will be described below with reference to the drawings.
As shown in FIGS. 10, 14, and 15, the coil conductor 8 of this example is inserted into a plurality of coil conductors 8 </ b> A inserted from one axial side of the plurality of slots 72 in the stator core 71 and the other axial side. In this method, a plurality of coil conductors 8 </ b> B to be inserted from above are alternately stacked one on another in the radial direction R of each slot 72.
When the coil conductors 8A and 8B are arranged on the stator core 71, as shown in FIGS. 1 and 2, the jig fixing portion 21 arranged on the inner periphery of the stator core 71 and the jig fixing portion 21 are integrated into the stator core 71. A pair of jig guide portions 22 arranged so as to protrude from both end surfaces in the axial direction and a number of jig rods 3 arranged radially along the axial direction L on the outer periphery of the pair of jig guide portions 22 are used.

  First, as shown in FIGS. 2 to 4, the jig fixing portion 21 and the pair of jig guide portions 22 are inserted and arranged on the inner periphery of the stator core 71. Next, the jig rods 3 and the coil conductors 8 are alternately placed in the radial direction R one by one at the positions where the outer circumferences of the pair of jig guide portions 22 are inserted into the slots 72 of the stator core 71 from the outside in the axial direction L. Arrange them in layers. Next, as shown in FIGS. 5 and 6, the jig rods 3 and the coil conductors 8 are inserted together from both sides in the axial direction L up to the intermediate position 721 in the axial direction of each slot 72. Next, as shown in FIGS. 7 to 10, the coil conductors 8 </ b> A located on one side in the axial direction are inserted into the slots 72 while pushing back the jig rods 3 located on the other side in the axial direction. The coil conductor 8B positioned on the side is inserted into each slot 72 while pushing back each jig rod 3 positioned on one side in the axial direction.

Hereinafter, the insertion method and the insertion jig of the coil conductor 8 of this example will be described in detail with reference to FIGS.
FIG. 1 is a perspective view showing a state in which each coil conductor 8 is inserted into each slot 72 of the stator core 71. 2 is a cross-sectional view showing the entire coil conductor insertion jig 1, FIG. 3 is an enlarged cross-sectional view showing a portion on one side in the axial direction of the coil conductor insertion jig 1, and FIG. FIG. 3 is an enlarged cross-sectional view showing a portion on the other side in the axial direction of the coil conductor insertion jig 1.
As shown in the drawings, in this example, in addition to the jig fixing portion 21, the pair of jig guide portions 22, and the many jig rods 3, the following many guide protrusions 23 and the pair of jig sliding portions. 4 and a coil conductor insertion jig 1 having a pair of jig pushing portions 5 are used.

  Here, in this example, the coil conductor 8 may be shown including the coil conductor 8A on one axial side and the coil conductor 8B on the other axial side. Moreover, in each figure of this example, the arrow of the axial direction L, the circumferential direction C, and the radial direction R is typically shown in FIG.1, FIG.2, FIG.15 etc. FIG.

The jig fixing portion 21 is configured to fit into the inner periphery of the stator core 71 (the inner peripheral surface of each tooth portion 73). On the both sides in the axial direction L of the jig fixing portion 21, reduced diameter portions 211 for fitting the cylindrical jig guide portions 22 are formed. The jig fixing portion 21 is used for centering the stator core 71 and the pair of jig guides 22. Instead of using the jig fixing portion 21, the pair of jig guides 22 can be centered using the outer peripheral portion of the stator core 71.
The jig guide portion 22 is used by fitting the inner portion of the cylindrical axial direction L to the outer periphery of the reduced diameter portion 211 of the jig fixing portion 21 and the inner periphery of the stator core 71. A large number of guide projections 23 and a large number of guide pins 24 for guiding the movement of the jig rod 3 and the coil conductor 8 in the axial direction L and a large number of guide pins 24 are spaced in the axial direction L on the outer periphery of the jig guide portion 22. They are spaced radially.

Each guide projection 23 is provided at a position facing each tooth portion 73 of the stator core 71 from the outside in the axial direction L, and the entire number of the guide projections 23 is equal to the circumferential direction C of the jig guide portion 22. They are arranged at intervals (radially). Each guide projection 23 is disposed near the inner end of the jig guide portion 22 in the axial direction L, and is disposed near the axial end surface 701 of the stator core 71.
Each guide pin 24 is provided at a position facing each guide projection 23 from the outside in the axial direction L, and the entire number of the guide pins 24 is equally spaced in the circumferential direction C of the jig guide portion 22 ( (Radially). Each guide pin 24 is disposed near the outer end of the jig guide portion 22 in the axial direction L. Each guide pin 24 can be removed when the jig sliding part 4 and the jig pushing part 5 are slid.

As shown in FIGS. 3 and 4, each jig rod 3 is guided by the guide protrusion 23 and the guide pin 24 at each jig sliding portion 4 at a position to be inserted into each slot 72 from the outside in the axial direction L. Thus, they are arranged so as to be slidable in the axial direction L. A plurality of jig rods 3 are arranged in the radial direction R with an interval for arranging the coil conductor 8. The entire jig rods 3 positioned on one side in the axial direction and the other side in the axial direction are arranged radially on the outer periphery of each jig sliding portion 4 (see FIG. 12). 12 is an explanatory view showing the jig rod 3 and the coil conductor 8 inserted into each slot 72 of the stator core 71 as seen from the axial direction L. FIG.
A plurality (three in this example) of jig rods 3 arranged in the radial direction R on one side in the axial direction and a plurality (three in this example) of jig rods 3 arranged in the radial direction R on the other side in the axial direction. Is inserted in the rod insertion hole 41 formed in each jig sliding portion 4 in a state where the radial direction R positions are shifted from each other.

  Each jig rod 3 of this example is formed by a round bar having a circular cross section. The tip of each jig rod 3 is processed into a taper shape. The stator 7 of this example is one in which the coil conductors 8 are arranged in a state where six are overlapped in the radial direction R of each slot 72, and the jig rod 3 is a slot in the circumferential direction C in each jig sliding portion 4. Three of them are arranged in the radial direction R at corresponding positions. In the jig rod 3, half the number of the coil conductors 8 arranged in the slot 72 is arranged on each jig sliding portion 4 on the outer periphery of each jig guide portion 22.

As shown in FIGS. 3 and 4, the pair of jig sliding portions 4 has a ring shape (see FIG. 11), and slides in the axial direction L on the outer periphery of the pair of jig guide portions 22. It is arranged as possible. The jig sliding portion 4 is disposed at a position outside the axial direction L in the jig guide portion 22. The jig sliding portion 4 is configured to push each coil conductor 8 into each slot 72 of the stator core 71 by a portion where the rod insertion hole 41 through which the jig rod 3 is inserted is not formed.
The pair of jig pushing portions 5 are arranged outside the jig sliding portions 4 in the axial direction L and are used to push the jig rods 3 into the slots 72 from the outside in the axial direction L. Each jig pushing part 5 of this example can be attached to and detached from each jig sliding part 4.
FIG. 11 is an explanatory diagram showing the jig sliding portion 4 that slides on the outer periphery of the jig guide portion 21 as viewed from the axial direction L.

FIG. 5 is a cross-sectional view showing the entire coil conductor insertion jig 1 in a state where each coil conductor 8 is pushed to the axially intermediate position 721 of each slot 72. FIG. 6 is an enlarged view of a part of FIG. FIG.
As shown in each figure, the coil conductor insertion jig 1 slides on the outer periphery of the pair of jig guide portions 22 so that the pair of jig sliding portions 4 and the pair of jig pushing portions 5 are brought close to the stator core 71. Thus, the jig rods 3 and the coil conductors 8 are pushed together from both sides in the axial direction L to the intermediate position 721 in the axial direction of each slot 72.

  FIG. 7 shows that each coil conductor 8A located on one side in the axial direction pushes back each jig rod 3 located on the other side in the axial direction to the outside of each slot 72, and each coil conductor 8B located on the other side in the axial direction It is sectional drawing which expands and shows the state which pushes back each jig | tool rod 3 located in the direction one side to the exterior of each slot 72. FIG. FIG. 8 is a perspective view showing a state where each coil conductor 8 is inserted into each slot 72 of the stator core 71. 9 is a cross-sectional view showing a state where each coil conductor 8 is inserted into each slot 72 of the stator core 71, and FIG. 10 is a cross-sectional view showing a part of FIG. 9 in an enlarged manner.

  The coil conductor insertion jig 1 removes the pair of jig pushing portions 5 after sliding the pair of jig sliding portions 4 and the pair of jig pushing portions 5, and only the pair of jig sliding portions 4. Are slid with respect to the pair of jig guide portions 22, and each jig rod 3 located on the other axial side is pushed back to the outside of each slot 72 by each coil conductor 8 located on the one axial side. The coil conductors 8 positioned on one side in the axial direction are pushed into the slots 72, and the jig rods 3 positioned on the one side in the axial direction are pushed into the slots 72 by the coil conductors 8 positioned on the other side in the axial direction. Each coil conductor 8 positioned on the other side in the axial direction is pushed into each slot 72 while being pushed back to the outside.

FIG. 13 is a perspective view showing the stator 7 manufactured by the method of inserting the coil conductor 8 of this example, and FIG. 14 is a cross-sectional view thereof. FIG. 15 is an explanatory diagram showing an enlarged view of a portion of the stator 7 as viewed from the axial direction L. FIG.
As shown in each drawing, the stator 7 manufactured by the insertion method of the coil conductor 8 of this example has a portion of the coil conductor 8 arranged in the slot 72 around the end in the axial direction L and the other end in the axial direction L. It has corrugated coils formed alternately in the direction C. The stator 7 has a distributed winding coil in which three-phase coils of U phase, V phase, and W phase are arranged in slots 72 of the stator core 71 with a predetermined number of slots.

  The coil conductor 8 of the present example has a substantially quadrangular cross section, a linear shape portion 81 along the axial direction L of the slot 72, a bent shape portion 82 that is bent in the circumferential direction C from one end of the linear shape portion 81, and It is what has. The rear end portion 821 of the bent shape portion 82 is further bent so as to be parallel to the axial direction L of the slot 72. Each coil conductor 8 includes a front end portion 811 of the linear shape portion 81 of the coil conductor 8A inserted into the slot 72 from one side in the axial direction and a bent shape portion 82 of the coil conductor 8B inserted into the slot 72 from the other side in the axial direction. The rear end portion 821 is joined, and the front end portion 811 of the linear portion 81 of the coil conductor 8B inserted into the slot 72 from the other axial side and the bending of the coil conductor 8A inserted into the slot 72 from one axial side. The rear end portion 821 of the shape portion 82 is joined to form a coil that is connected in a wave shape in the circumferential direction C of the stator core 71.

Next, the order in which the coil conductors 8 are inserted into the slots 72 of the stator core 71 using the coil conductor insertion jig 1 and the effects thereof will be described in detail.
In this example, the coil conductor 8 is inserted into a plurality of coil conductors 8 divided in units arranged in each slot 72 of the stator core 71 from one axial side and the other axial side with respect to each slot 72. This is a method of alternately inserting one by one in the radial direction R.

  In arranging the coil conductor 8 in the stator core 71, first, as shown in FIGS. 2 to 4, the jig fixing portion 21 and the pair of jig guide portions 22 are inserted and arranged on the inner periphery of the stator core 71. At this time, the pair of jig guide portions 22 is fitted to the jig fixing portion 21 fitted on the inner periphery of the stator core 71. Each guide projection 23 and each guide pin 24 are attached to the jig guide portion 22, and each jig guide portion 22 has a jig rod in a space formed between the guide projection 23 and the guide pin 24. 3 and the coil conductor 8 are alternately stacked and arranged in the radial direction R one by one. The jig rod 3 and the coil conductor 8 are stacked in the radial direction R by the number corresponding to the number of slots 72 of the stator core 71 on the outer periphery of the pair of jig guide portions 22.

Further, when the jig rod 3 and the coil conductor 8 are stacked in the radial direction R, the rear end portion of each jig rod 3 is inserted into the rod insertion hole 41 formed in each jig sliding portion 4. Each jig pushing portion 5 is attached to the outer end surface in the axial direction of each jig sliding portion 4. And the position of the front-end | tip part of each jig | tool rod 3 can be arrange | equalized by pressing the rear-end part of each jig | tool rod 3 against the jig | tool pushing-in part 5. FIG.
The entire guide pin 24 is removed after the arrangement of each jig rod 3 and each coil conductor 8 is completed.

  Next, as shown in FIG. 1 and FIG. 2, the jig guide part on one axial direction so that the jig sliding part 4 and the jig pushing part 5 on one axial side approach the stator core 71 from one axial side. The jig guide part 22 on the other side in the axial direction is slid on the outer periphery of the jig 22, and the jig sliding part 4 and the jig pushing part 5 on the other side in the axial direction are brought closer to the stator core 71 from the other side in the axial direction. Slide the outer periphery of. At this time, the rear end portion 821 of the bent portion 82 of each coil conductor 8A on one axial side abuts on the inner end surface in the axial direction of the jig sliding portion 4 on one axial side, and The jig guide portions 22 and the coil conductors 8A are pushed together to the axial intermediate position 721 of each slot 72 in a state where the jig guide portions 22 and the coil conductors 8A are alternately overlapped one by one in the radial direction R. Further, the rear end portion 821 of the bent portion 82 of each coil conductor 8B on the other side in the axial direction comes into contact with the inner end surface in the axial direction of the jig sliding portion 4 on the other side in the axial direction, and The jig guide portions 22 and the respective coil conductors 8B are pushed together to the axial intermediate position 721 of each slot 72 in a state where the jig guide portions 22 and the coil conductors 8B are alternately overlapped one by one in the radial direction R.

Thereby, the insertion of each coil conductor 8 into each slot 72 can be guided by each jig rod 3, and each coil conductor 8 can be stably inserted into each slot 72.
Next, as shown in FIGS. 5 and 6, when each jig rod 3 and each of the coil conductors 8A and 8B are inserted from both sides in the axial direction L to the axial intermediate position 721 of each slot 72, one axial side The tip ends of the coil conductors 8A positioned at the contact points with the tip ends of the jig rods 3 positioned on the other side in the axial direction, and the tips of the coil conductors 8B positioned on the other side in the axial direction are positioned on the one side in the axial direction. It contacts the tip of each jig rod 3 to perform. Then, each jig pushing portion 5 is removed from each jig sliding portion 4.

Next, as shown in FIG. 7, the outer periphery of the jig guide portion 22 on one side in the axial direction is slid so that the jig sliding portion 4 on the one side in the axial direction further approaches the stator core 71 from one side in the axial direction. In addition, the outer periphery of the jig guide portion 22 on the other side in the axial direction is slid so that the jig sliding portion 4 on the other side in the axial direction is brought closer to the stator core 71 from the other side in the axial direction.
Then, as shown in FIGS. 8 to 10, while the jig rods 3 positioned on the other side in the axial direction are pushed back to the outside of the slots 72 by the coil conductors 8 </ b> A positioned on the one side in the axial direction, Each coil conductor 8 </ b> A located on the side is pushed into each slot 72. Further, each coil conductor 8B positioned on the other side in the axial direction is pushed back to the outside of each slot 72 by each coil conductor 8B positioned on the other side in the axial direction. It is pushed into each slot 72.

  Thus, in this example, by using the jig rod 3, the coil conductor 8 is quickly and stably moved in the radial direction R of each slot 72 by the operation of pushing the coil conductor 8 from both sides of the stator core 71 in the axial direction L. 8 can be arranged in an overlapping manner. Further, each coil conductor 8 can be disposed in each slot 72 without dividing the stator core 71.

DESCRIPTION OF SYMBOLS 1 Coil conductor insertion jig 21 Jig fixing part 22 Jig guide part 23 Guide protrusion 3 Jig rod 4 Jig sliding part 5 Jig pushing part 7 Stator 71 Stator core 72 Slot 73 Teeth part 8A, 8B Coil conductor 81 Straight line Shape part 82 Bent shape part

Claims (3)

A plurality of coil conductors inserted from one side in the axial direction of a plurality of slots in the stator core and a plurality of coil conductors inserted from the other side in the axial direction are alternately stacked in the radial direction of each slot. A way to
A pair of jig guide portions that protrude from both axial end surfaces of the stator core and are arranged on the stator core, and a plurality of jig rods that are arranged radially along the axial direction on the outer periphery of the pair of jig guide portions; , And
The pair of jig guide portions are arranged on the stator core,
On the outer periphery of the pair of jig guide portions, the jig rods and the coil conductors are alternately stacked one on the other in the radial direction at positions inserted into the slots of the stator core from the outside in the axial direction,
Next, the jig rods and the coil conductors are inserted together from both sides in the axial direction to the intermediate position in the axial direction of the slots,
Next, the coil conductors positioned on one side in the axial direction are inserted into the slots while pushing back the jig rods positioned on the other side in the axial direction, and the coil conductors positioned on the other side in the axial direction are A coil conductor insertion method comprising inserting each jig rod located on one side in the axial direction into each slot while pushing back.   2. The coil conductor insertion method according to claim 1, wherein the coil conductor has a substantially quadrangular cross section, and is bent in a circumferential direction from one end of the linear shape portion and a linear shape portion along the axial direction of the slot. The coil conductor inserted into the slot from the other end in the axial direction, and the tip of the linear shape portion of the coil conductor inserted into the slot from one side in the axial direction. And joining the rear end portion of the bent shape portion of the coil conductor, the tip portion of the linear shape portion of the coil conductor inserted into the slot from the other axial side, and the slot inserted from the one axial side to the slot. A method of inserting a coil conductor, wherein the coil conductor is joined to a rear end portion of the bent portion of the coil conductor to form a coil connected in a wave shape in the circumferential direction of the stator core. A plurality of coil conductors inserted from one side in the axial direction of a plurality of slots in the stator core and a plurality of coil conductors inserted from the other side in the axial direction are alternately stacked in the radial direction of each slot. A jig for
A pair of jig guide portions that protrude from both axial end surfaces of the stator core and are disposed on the stator core; and
On the outer periphery of the pair of jig guide portions, a large number of guide protrusions arranged radially at positions facing the teeth portions between the slots of the stator core from the outside in the axial direction;
A pair of jig sliding parts arranged so as to be slidable in the axial direction on the outer periphery of the pair of jig guide parts,
In the pair of jig sliding portions, the coil conductors are arranged at positions where they are inserted into the slots from the outside in the axial direction while being guided by the guide protrusions and slidable in the axial direction. A large number of jig rods arranged radially in the radial direction,
A pair of jig pushing portions arranged on the outside in the axial direction with respect to the pair of jig sliding portions, and for pushing the jig rods into the slots from the outside in the axial direction,
The plurality of jig rods arranged in the radial direction on one side in the axial direction and the plurality of jig rods arranged in the radial direction on the other side in the axial direction are in a state where the radial positions are shifted from each other. It is inserted through the rod insertion hole formed in the sliding part,
The pair of jig sliding portions and the pair of jig pushing portions are slid on the outer circumferences of the pair of jig guide portions so as to be close to the stator core until the axially intermediate positions of the slots are reached. The jig rods and the coil conductors are pushed together from both sides in the axial direction, and then only the pair of jig sliding parts are slid, and the coil conductors located on one side in the axial direction While pushing back each jig rod located on the other side in the axial direction to the outside of each slot, each coil conductor located on the one side in the axial direction is pushed into each slot, and each of the positions located on the other side in the axial direction. The coil conductor pushes each coil conductor located on the other side in the axial direction into each slot while pushing back each jig rod located on the one side in the axial direction to the outside of each slot. Insertion jig of the coil conductor, characterized in that are configured so.

Images