JP3863010B2 - Stator manufacturing method and manufacturing apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a manufacturing method and a manufacturing apparatus for a stator of a motor used in household electrical appliances and automobiles.
[0002]
[Prior art]
Conventionally, as a method and apparatus for manufacturing this type of stator, a plurality of blades in which coils wound spirally around a winding frame of a coil winding machine are implanted in the same circumference at predetermined intervals. A method and apparatus are widely used in which a coil insertion jig having a coil insertion jig is inserted into a predetermined slot of a stator mounted on the coil insertion jig and transferred.
FIG. 13 shows a plurality of sets of first, second, third, fourth, and fifth windings wound by a coil winding machine (not shown) on a known coil insertion jig 40 that has been conventionally used. It is a front view which shows typically the state which left the coils 10a, 10b, 10c, 10d, and 10e of the circumference between the some braid | blades 41, The circumference of the coils 10a to 10e of the 1st to 5th rounds is All were the same.
In this state, the stator 1 is mounted on the upper portion of the wedge guide 44 provided on the outer peripheral portion of the coil insertion jig 40, the stripper 43 is raised, and the coils 10a to 10e in the first to fifth laps are inserted into predetermined slots. Insert between 1a. FIG. 14 shows a coil insertion state in the slot 1a. The coils 10e to 10a in the fifth to first rounds are sequentially located from the outer diameter side to the inner diameter side of the slot.
[0003]
When manufacturing an 8-pole stator in which a plurality of sets, for example, three-phase coils are sequentially inserted into predetermined slots using such a stator manufacturing apparatus, the coils are stored in the coil insertion jig 40. Further, eight sets of first-phase coils 11 (all of which consist of coils 11a to 11e in the first to fifth turns) are first inserted into predetermined slots (see FIGS. 15 and 16).
In this state, the inserted first-phase coil 11 closes the slot for inserting the next coil, so that the coil end of the first-phase coil 11 is moved to the outer diameter side of the slot as shown in FIGS. 19, the second phase coil 12 is inserted into a predetermined slot as shown in FIG. 19. Similarly, after the coil end of the second phase coil 12 is expanded, a third phase coil (not shown) is formed. Are inserted into the remaining slots.
[0004]
[Problems to be solved by the invention]
However, in such a conventional stator manufacturing method and manufacturing apparatus, the coil circumferential length of each phase is adjusted from the first round in accordance with the site that requires the longest coil for insertion and molding of the coil. All were wound to the same length until the fifth lap. Therefore, in the first-phase coil 11 inserted first, as shown in FIG. 16, the first-round coil 11a inserted on the slot inner diameter side and the fifth-round coil 11e inserted on the slot outer diameter side. Had the same length.
Therefore, in the state shown in FIGS. 17 and 18 in which the coil end of the first phase coil 11 is formed, the coil end of the first coil 11a on the inner diameter side of the slot is expanded to form the second phase coil 12. In the state in which the slot into which the coil is inserted is opened, the coil 11e on the fifth circumference on the slot outer diameter side bulges to the slot outer diameter side more than necessary and is in a relaxed state.
[0005]
Further, as shown in FIG. 19, the second-phase coil 12 inserted so as to straddle the previously-inserted first-phase coil 11 also has a first-round coil 12a on the slot inner diameter side and a slot outer diameter side. The circumference of the coil 12e in the fifth round was the same. However, since the first-phase coil 11 inserted and molded first has a lower slot inner diameter side and a higher slot outer-diameter side, the second-phase coil 12 is molded across the first-phase coil 11. The first coil 12a on the inner diameter side of the slot having a peripheral length matched to the fifth coil 12e on the outer diameter side of the slot is in a relaxed state.
In addition, although illustration is abbreviate | omitted, also about the 3rd-phase coil inserted last and straddling both the 1st-phase and 11th-phase coils 11 and 12 inserted previously and the 2nd-phase coil 12 Similarly, the first coil on the slot inner diameter side, which has a circumference matched to the fifth coil on the outer diameter side of the slot, is in a relaxed state.
[0006]
Thus, in the conventional stator manufacturing method and manufacturing apparatus, the circumference of the coil inserted into the slot is all set to be the same in accordance with the portion that requires the longest length when inserting and forming the coil. Therefore, depending on the part of the slot to be inserted, a coil longer than necessary was inserted, and the size of the coil end was increased and the stator was enlarged, and at the same time, an extra copper loss occurred. There was a problem that the efficiency of the motor was reduced.
The present invention has been made in view of the above points, and by arbitrarily setting the coil length for each turn according to the slot insertion site, the total coil length of the stator can be shortened. The purpose is to reduce the copper loss and improve the efficiency of the motor while making the motor compact.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a method for manufacturing a stator in which a multi-phase coil composed of a plurality of poles is divided into a plurality of times and sequentially inserted into predetermined slots of the stator. For each phase coil inserted into the slot, a winding frame having a number of steps corresponding to the number of turns of the coil is used, and each coil is wound according to the radial position of the slot into which the coil is inserted. The present invention provides a method for manufacturing a stator in which winding is performed by changing the circumference sequentially .
In the stator manufacturing method described above, in the first-phase coil inserted first, the circumference of the coil on the slot inner diameter side into which the coil is inserted is longer than the circumference of the coil on the slot outer diameter side. In the second and subsequent coils inserted after the second time, the circumferential length of the coil on the inner diameter side of the slot into which the coil is inserted is preferably shorter than the circumferential length of the coil on the outer diameter side of the slot.
[0008]
Further, the stator manufacturing apparatus according to the present invention includes a stator having a plurality of coils formed by spirally winding a wire supplied from a swirling flyer around a winding frame that is sequentially lowered via a coil insertion jig. In the stator manufacturing apparatus to be inserted into the predetermined slot, the winding frame is composed of a fixed winding frame and a movable winding frame, and the distance from the fixed winding frame is variable to the movable winding frame. A plurality of movable frames and drive means capable of driving each of the plurality of movable frames are provided, and the drive means is provided on the axis of the winding frame so as to be rotatable at a predetermined angle. And a plurality of cams that can drive the plurality of movable frames in a direction away from the fixed winding frame, and a biasing unit that biases the plurality of movable frames in a direction approaching the fixed winding frame, respectively. Is .
[0009]
Further, in the stator manufacturing apparatus, the plurality of cams may have the same outer shape and differ only in the position of the shaft hole. The outer shape of the plurality of cams is oval, and the position of the shaft hole is the position of the plurality of cams. It is preferable that each differs along the major axis direction.
In the stator manufacturing apparatus, the plurality of movable frames may be in contact with the plurality of cams via a plurality of guide members slidably attached to the winding frame fixing portion. More preferably, the plurality of guide members have the same shape.
By configuring the present invention as described above, in the method of manufacturing the stator, the total coil length inserted into the stator is shortened to reduce copper loss and to make the coil end compact. Is possible.
In the stator manufacturing apparatus according to the present invention, the coil peripheral length for each winding can be changed over a plurality of patterns with a simple configuration, and the coil wound around the winding frame is coil inserted. When depositing in a tool, it is possible to make the deposit easier by relaxing each coil by relaxing each movable frame.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be specifically described below with reference to the drawings.
FIG. 1 is a front view schematically showing an embodiment of a stator manufacturing apparatus according to the present invention, and FIG. 2 is a longitudinal sectional view taken along line XX in FIG. 3 showing the configuration of the winding frame of the coil winding machine. 3 is a bottom view, FIG. 4 is a longitudinal sectional view showing an example of a state where a step is attached to the reel, FIG. 5 is a bottom view thereof, and FIG. 6 is a step attached to the reel. FIG. 7 is a front view schematically showing the coil winding state.
As shown in FIG. 1, the stator manufacturing apparatus includes a coil winding machine 20 and a coil insertion jig 40, and the coil winding machine 20 holds a winding frame 30 and the winding frame 30. A support plate 21 that can move up and down, a plurality of coil drops 22 that are slidably mounted on the support plate 21, and a plurality of grooves that are fixed to the lower end of the coil drop 22 and formed in the winding frame 30. By moving up and down inside, there is a pressing plate 23 that releases the coil wound around the winding frame 30 downward.
[0011]
On these outer sides, a flyer 24 through which a plurality of wires 2 forming a coil (10 strips are shown in FIG. 1) is rotatably provided, and the flyer 24 is wound at high speed. By turning around the frame 30, the wire 2 can be spirally wound around the descending winding frame 30.
Below the coil winding machine 20, a conventionally known coil insertion jig 40 that can receive a wound coil and insert it as it is into a stator is disposed. The coil insertion jig 40 corresponds to the internal teeth of the stator 1 to which a coil is to be inserted, and a plurality of blades 41 consisting of fixed blades and movable blades alternately at a predetermined interval on the same circumference. The bases of both fixed and movable blades are fixed to a plurality of grooves 42a and 43a provided on the outer periphery of the blade base 42 and the stripper 43, respectively, and a wedge guide 44 is provided on the outer periphery of the wedge guide case. 45 is held around the blade 41.
[0012]
Here, the reel 30 which comprises the principal part of this embodiment is demonstrated with reference to FIG.2 and FIG.3. The winding frame 30 includes a support plate 21 that can move up and down, a fixed winding frame 31 fixed to the support plate 21, and a movable winding frame 32 that can adjust the interval between the fixed winding frame 31 for each winding stage. The circumference of the coil wound helically can be arbitrarily changed. Bases 31a and 32e are integrally provided on the uppermost portions of both the fixed and movable reels 31 and 32, and the blade 41 and the wedge guide 44 of the coil insertion jig 40 are inserted into the fixed reel 31. A gap portion 31b is formed, and a substrate portion 32f, which is a winding frame fixing portion, is suspended from the pedestal 32e of the movable winding frame 32 on the fixed winding frame 31 side.
[0013]
The movable winding frame 32 is provided such that the first, second, third, and fourth movable frames 32a, 32b, 32c, and 32d are stacked on each other and relatively movable from the lower side. The first to fourth movable frames 32a to 32d are integrally provided with a pair of guide shafts 33 and 33 which are inserted through the base plate portion 32f of the base 32e and are slidable in the horizontal direction. A guide plate 34 that constitutes a guide member together with the guide shaft 33 is fixed. Then, compression springs 35 are respectively engaged between the guide plate 34 and the substrate portion 32f, and the first to fourth movable frames 32a to 32d integrated therewith are attached to the fixed reel 31 via the guide member. It is fast.
[0014]
The shaft center A of the winding frame 30 is provided with a cam shaft 36 that moves in the vertical direction of the winding frame 30 and is capable of rotating 180 degrees around the axis A, and the first to fourth movable frames 32a. Corresponding to ˜32d, oval first to fourth cams 37a to 37d are integrally fixed to the cam shaft 36. 2 and 3, the camshaft 36 is rotated 90 degrees in a predetermined direction (clockwise in FIG. 3), whereby the first to fourth movable frames 32a to 32d are respectively attached to the compression springs 35. Driving outward against the urging force, a step is formed in the movable winding frame 32 as shown in FIG.
When the cam shaft 36 is rotated 90 degrees in the opposite direction from the state shown in FIGS. 4 and 5, the pressing of the respective guide plates 34 by the first to fourth cams 37 a to 37 d is released, and the compression spring 35. Due to the urging force, each guide plate 34 returns to the contracted state shown in FIGS. 2 and 3 along with the first to fourth movable frames 32a to 32d.
[0015]
In the embodiments described so far, the first movable frame 32a of the movable winding frame 32 is biased to the maximum via the guide plate 34 by the first cam 37a, and the second and third movable frames 32b and 32c are biased. Although the amount is sequentially decreased and the fourth movable frame 32d is biased to the minimum distance, FIG. 6 is a longitudinal section showing another example in which the bias amount of the first to fourth movable frames 32a to 32d is changed. FIG.
In this case, the camshaft 36 may be rotated 90 degrees in the direction opposite to that shown in FIGS. 4 and 5, and the switching is very easy.
[0016]
Note that the modified examples of the movable reel 32 are not limited to these, and by changing the cam arrangement, it is possible to realize more combinations of patterns using the same reel.
At this time, the outer shapes of the first to fourth cams are all the same oval so that only the position of the axial hole of the shaft hole fitted to the cam shaft is different, and the first to fourth cams are also different. The shape of the guide member which consists of a guide shaft and a guide plate protruding from the movable frame and the compression spring which urges the first to fourth movable frames in the direction of the first to fourth cams through the guide member, respectively. If they are all the same, the productivity of the parts constituting the reel can be made extremely good.
[0017]
Next, a stator manufacturing method using the stator manufacturing apparatus having the coil winding machine 20 and the coil insertion jig 40 as described above will be described with reference to FIG.
FIG. 7 is a front view schematically showing a coil winding state by the coil winding machine 20 shown in FIG. A wire 2 in which a flyer 24 is swung at a high speed around the axis A of the reel 30 and a plurality of (for example, 10) copper wires are arranged in a strip shape from the lower end thereof is shown in the ascending position shown in FIG. Winding is performed between the fixed reel 31 and the movable reel 32 of the reel 30 that moves to the lowered position shown in FIG. Thereby, between the 1st-4th movable frames 32a-32d and the fixed winding frame 31 of the movable winding frame 32, as shown in FIG. It is formed. At this time, the circumference of the coil 10a in the first round is maximized, the circumferences of the coils 10b, 10c, and 10d in the second, third, and fourth rounds are sequentially reduced, and the coil 10e in the fifth round is reduced. The circumference is minimized.
At the same time, the upper portion of the blade 41 of the coil insertion jig 40 is inserted into the gap 31b of the lowered fixed reel 31.
[0018]
When the cam winding 36 (see FIG. 1) is reversed 90 degrees to release the pressing of the guide plates 34 by the first to fourth cams 37a to 37d in the coil winding end state shown in FIG. The first to fourth movable frames 32a to 32d are retracted to the inner diameter side by the urging force, and the state shown in FIGS. 2 and 3 is lost, and the stepped portion of the movable winding frame 32 disappears and is wound around each movable frame. The coils 10a to 10e in the first to fifth turns are in a relaxed state.
When the coil drop 22 shown in FIG. 7 is lowered with the reel 30 in this state, the pressing plate 23 fixed to the lower end releases the coils 10e to 10a from the fifth to the first turn downward. Then, the coil 10a of the first turn comes into contact with the upper portion of the stripper 43 of the coil insertion jig 40 and stops, and the coils 10a to 10e of the first turn to the fifth turn are deposited between predetermined blades as shown in FIG. This is the same state as shown. However, this embodiment is different from FIG. 13 in that the circumference of the first coil 10a is maximum and the circumference of the fifth coil 10e is minimum as shown in FIG.
[0019]
Thus, after depositing the coils 10a to 10e of the first to fifth turns in the coil insertion jig 40, the stator 1 having a plurality of slots into which the coils are to be inserted as shown in FIG. When the stripper 43 is lifted while being fixed to the upper portions of the plurality of wedge guides 44, the coils 10a to 10e of the first to fifth laps are pushed onto the upper surface of the stripper 43 and inserted into the slots of the stator 1, respectively. .
At this time, as already described with reference to FIG. 14, the coil inserted into the predetermined slot 1a of the stator 1 is inserted in the inner diameter direction after the coil 10e of the fifth turn is first inserted on the outer diameter side of the slot 1a. The coils 10d, 10c, and 10b in the fourth, third, and second turns are sequentially inserted, and the coil 10a in the first turn is inserted on the innermost side, that is, on the inlet side of the slot 1a. In this case, the circumference of the coil 10a in the first round is the maximum, and the circumference of the coil 10e in the fifth round is the minimum, so that the coil inserted into the predetermined slot 1a of the stator 1 The circumferential length of the inserted first coil 10a is the maximum, and the circumferential length of the fifth coil 10e inserted on the slot outer diameter side is the minimum.
On the other hand, as shown in FIG. 6, when the displacement amount of the fourth movable frame 32d of the movable winding frame 32 is the maximum and the displacement amount of the first movable frame 32a is the minimum, a predetermined slot of the stator The circumference of the coil 10e of the fifth turn inserted on the outer diameter side of the coil is the maximum and the circumference of the coil 10a of the first turn inserted on the inner diameter side of the slot is the minimum.
[0020]
Here, in the stator in which the coil is inserted in a plurality of times, the first-phase coil 11 inserted in the first time is the circumference of the first-turn coil 11a inserted in the slot inner diameter side as described above. The length is required to be longer than the circumferential length of the fifth coil 11e inserted on the slot outer diameter side. Therefore, as shown in FIG. 1 to FIG. 5, the first to first displacements of the first movable frame 32 a of the coil winding machine 20 are maximized and the displacement of the fourth movable frame 32 d is minimized. A cam shaft 36 having four cams 37a to 37d is used.
In addition, as described above, the second-phase coil 12 to be inserted next has the circumference of the coil 12a of the first turn inserted on the slot inner diameter side being the fifth turn inserted on the slot outer diameter side. It is required to be shorter than the circumference of the coil 12e. Therefore, as shown in FIG. 6, the first movable frame of the coil winding machine 20 is obtained by rotating the camshaft 36 from the state shown in FIGS. 2 and 3 by 90 degrees in the opposite direction to FIGS. The fourth movable frame 32d can be driven such that the amount of deviation 32a is the smallest and the amount of deviation of the fourth movable frame 32d is the largest.
[0021]
8 and 9, the first-phase coil 11 wound with the winding frame 30 in which the displacement amount of the first movable frame 32a is set to the maximum and the displacement amount of the fourth movable frame 32d is set to the minimum is fixed. It is the top view and side sectional view which show the state inserted in the predetermined slot of the child. As shown in FIG. 9, the inserted first-phase coil 11 has the maximum circumference of the first turn coil 11a inserted on the slot inner diameter side and the fifth turn inserted on the slot outer diameter side. The circumference of the coil 11e is the minimum.
In this state, when the coil end of the coil 11 of the first phase is expanded to the slot outer diameter side in order to open the slot for inserting the coils after the second phase, as shown in FIG. 10 and FIG. The coil 11e on the fifth round on the side can be expanded even if the circumference is short, so that the total coil length of the first phase from the first round to the fifth round can be shortened.
[0022]
Next, when inserting the second phase coil 12 into the open slot of the stator 1, the circumference of the first coil 12a on the inner diameter side of the slot is the smallest and the fifth circumference on the outer diameter side of the slot is the smallest. A coil having the maximum circumference of the coil 12e is inserted. FIG. 12 is a cross-sectional view showing a state where the second-phase coil 12 is inserted into a predetermined slot after the first-phase coil 11 is expanded. In this state, since the second-phase coil 12 closes the slot in which the third-phase coil is inserted, the coil end is also expanded to the outer diameter side of the slot. At this time, the second-phase coil 12 needs to straddle the first-phase coil 11 that has been previously inserted and expanded, and the first-phase coil 11 has an inner diameter side as shown in FIG. Since the outer diameter side is lower and the outer diameter side is higher, the first coil 12a on the inner diameter side of the coil 12 of the second phase that is expanded and formed this time may have a short circumference. As a result, the total coil length of the second phase coil 12 can be shortened.
[0023]
Further, although not shown in the figure, the third-phase coil that is finally inserted into the remaining slot is formed into a shape necessary for the product together with the first-phase and second-phase coils 11 and 12. The At this time, since the third-phase coil needs to straddle both the first-phase and second-phase coils 11, 12, the third-phase coil is also arranged on the slot inner diameter side in the same manner as the second-phase coil 12. It is preferable to shorten the total coil length of the third phase by shortening the first coil and lengthening the coil on the outer diameter side of the slot.
As described above, the coil length of each phase to be inserted into the stator is reduced to the minimum necessary for each turn according to the order of insertion and the shape to be molded. It is possible to manufacture a stator that is shortened, has reduced copper loss, has excellent characteristics, and has a small coil end.
In the above embodiment, the present invention has been described with respect to the case where the present invention is composed of eight poles and a three-phase coil is divided into three and inserted into the stator slot. However, the present invention is not limited thereto. It is possible to manufacture a stator in which a multi-phase coil composed of an arbitrary plurality of poles is divided into a plurality of times and inserted into a slot. The present invention can also be practiced without any inconvenience in a winding machine in which a winding frame rotates to wind a wire to form a coil.
[0024]
【The invention's effect】
As described above, according to the present invention, the following effects can be obtained.
According to the method for manufacturing a stator according to claim 1, the coil of each phase inserted into the stator has a minimum necessary length for each turn according to the radial portion of the slot into which the coil is inserted. The total coil length can be shortened to reduce copper loss, and the coil end can be reduced to reduce the size of the stator.
According to the method for manufacturing a stator according to claim 2, the total coil length of the first-phase coils to be inserted first is shortened to prevent loosening of the coil on the outer diameter side of the slot when expanded. be able to.
According to the method for manufacturing a stator according to claim 3, it is possible to shorten the total coil length by shortening the coil circumferential length on the slot inner diameter side after the second phase inserted after the second phase. Become.
[0025]
According to the stator manufacturing apparatus according to claim 4 , the plurality of movable frames can be driven with a very simple configuration, and the circumferential length of the coil can be arbitrarily set for each turn. It becomes possible to improve performance by shortening the coil length .
According to the stator manufacturing apparatus of the fifth aspect, since the outer diameters of the plurality of cams that respectively drive the plurality of movable frames of the movable winding frame are made the same, they can be produced at low cost.
According to the stator manufacturing apparatus of claim 6, the outer diameters of the plurality of cams are oval, and the position of the shaft hole is the position along the long axis direction. You can know the amount.
According to the stator manufacturing apparatus of claim 7 , the plurality of movable frames are brought into contact with the plurality of cams via the plurality of guide members slidably attached to the winding frame fixing portion. It becomes possible to move the movable frame smoothly.
According to the stator manufacturing apparatus of the eighth aspect , since the plurality of guide members have the same shape, it is possible to simplify the component configuration.
[Brief description of the drawings]
FIG. 1 is a front view schematically showing an embodiment of the present invention.
2 is a longitudinal sectional view taken along the line XX of FIG. 3 showing the structure of the winding frame of the coil winding machine. FIG.
FIG. 3 is a bottom view of the same.
FIG. 4 is a longitudinal sectional view showing an example of a state in which a step is similarly provided on the winding frame.
FIG. 5 is a bottom view of the same.
FIG. 6 is a longitudinal sectional view showing another example of a state in which a step is similarly provided on the winding frame.
FIG. 7 is a front view schematically showing the coil winding state.
FIG. 8 is a front view of the stator showing a state where a first-phase coil is inserted.
FIG. 9 is a side sectional view of the same.
FIG. 10 is a plan view of a stator showing a state where a first phase coil is expanded.
FIG. 11 is a side sectional view of the same.
FIG. 12 is a side sectional view showing a state where a second-phase coil is inserted.
FIG. 13 is a front view schematically showing a state in which a coil wound by a conventionally used method for manufacturing a stator is placed in a coil insertion jig.
FIG. 14 is a cross-sectional view showing a coil insertion state in the slot.
FIG. 15 is a plan view of the stator showing a state where a first-phase coil is also inserted.
FIG. 16 is a sectional side view of the same.
FIG. 17 is a plan view of the stator showing a state in which the first-phase coil is similarly expanded.
FIG. 18 is a side sectional view of the same.
FIG. 19 is a side sectional view of the stator showing a state where a second-phase coil is inserted.
[Explanation of symbols]
1: Stator 2: Wires 10a to 10e: 1st to 5th coils 11a to 11e: 1st phase 1st to 5th coils 12a to 12e: 2nd phase 1st to 5th coils Peripheral coil 20: coil winding machine 22: coil drop 24: flyer 30: winding frame 31: fixed winding frame 32: movable winding frames 32a to 32d: first to fourth movable frames 32e: pedestal 32f: substrate portion 33: Guide shaft 34: Guide plate 35: Compression spring 36: Cam shafts 37a to 37d: First to fourth cams 40: Coil insertion jig 41: Blade

Claims (8)

A stator manufacturing method in which a multi-phase coil comprising a plurality of poles is divided into a plurality of times and sequentially inserted into a predetermined slot of the stator,
Each phase of the coil inserted into the stator slot, using a winding frame having a number of steps corresponding to the number of turns of the coil, according to the radial position of the slot into which the coil is inserted A method for manufacturing a stator, wherein the winding is performed by sequentially changing the circumference for each winding.   2. The stator manufacturing method according to claim 1, wherein the first-phase coil to be inserted first has a circumferential length of the coil on the slot inner diameter side into which the coil is inserted, as compared with a circumference of the coil on the slot outer diameter side. A method of manufacturing a stator, wherein the stator is lengthened. 2. The stator manufacturing method according to claim 1, wherein the second and subsequent coils inserted after the second time have a circumferential length of the coil on the slot inner diameter side into which the coil is inserted, and A method of manufacturing a stator, characterized by being shorter than the circumference. A stator in which a plurality of coils formed by spirally winding a wire supplied from a swirling flyer around a winding frame is inserted into a predetermined slot of the stator via a coil insertion jig. In the manufacturing equipment of
The reel comprises a fixed reel and a movable reel, a plurality of movable frames each having a variable distance from the fixed reel and a drive capable of driving the plurality of movable frames. Means ,
The drive means is provided with a cam shaft provided at the axis of the winding frame so as to be rotatable by a predetermined angle, and a plurality of movable frames fixed to the cam shaft and capable of driving the plurality of movable frames away from the fixed winding frame. An apparatus for manufacturing a stator , comprising: a cam; and an urging unit that urges each of the plurality of movable frames in a direction approaching the fixed winding frame . The stator manufacturing apparatus according to claim 4 , wherein the plurality of cams have the same outer shape and differ only in the position of the shaft hole. The stator manufacturing apparatus according to claim 5 , wherein the plurality of cams have an oval outer shape, and positions of shaft holes thereof are different along a long axis direction of the plurality of cams. 5. The stator manufacturing apparatus according to claim 4, wherein the plurality of movable frames abut on the plurality of cams via a plurality of guide members slidably mounted on the winding frame fixing portion. The stator manufacturing apparatus according to claim 7 , wherein the plurality of guide members have the same shape.

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