JPH0720357B2 - Coil inserter - Google Patents

Description

The present invention relates to a coil insertion device for inserting a plurality of coils wound in advance in slots of a magnetic iron core of a rotary electric machine in one step.

1 and 2 show a first configuration example of a conventional coil insertion device.

In FIGS. 1 and 2, the blade 4 is a magnetic iron core 1
Corresponding to the slots 15 are arranged in a ring shape along the axial direction, and the lower end thereof is connected to the base 8 by a pin (not shown) or the like. A wedge guide 5 is annularly arranged on the outer peripheral side of the blade 4.

The stripper 6 is a block having a conical slope, and is attached to the upper end of the rod 9 by a bolt 17. Although not shown, the rod 9 moves up and down by a driving means such as a hydraulic cylinder. A groove 6a is formed on the outer peripheral portion of the stripper 6 along the axial direction of the magnetic core 1, and the groove 6a is slidably fitted to the blade 4. In addition, wedge pushers 7 are provided between the wedge guides 5 arranged in an annular shape.
Is provided, and the pusher 7 slides along the wedge guide 5 by being vertically driven by a hydraulic cylinder or the like (not shown).

The coil inserting device constructed as described above, when inserting the coil, first moves the stripper 6 to the lowered position 6'shown by the chain double-dashed line, sets the wedge 16 at the predetermined position 16 'of the wedge guide 5, and then After the second layer coil 3 is hooked on the predetermined position 3'of the blade 4 and set on the stripper 6, the first layer coil 2 is similarly hooked on the predetermined position 2'of the blade 4 to set the second layer coil. Set on top of 3.

Then, a ring formed by a large number of blades 4 is fitted on the inner circumference of the magnetic iron core 1, and is fixed by an iron core holding means (not shown).

When the rod 9 is raised after the above preparation, the stripper 6 is moved by the rod 9 from the lowered position 6'shown by the chain double-dashed line to the second layer coil 3 and the first layer coil 2.
The coil 2 and the coil 3 are inserted into the desired slot 15 of the magnetic core 1 by pushing up and moving up to the position shown by the solid line. In this case, the wedge 16 is inserted into the slot 15 by raising the wedge pusher 7 at the same time. In FIGS. 1 and 2, 19 is a slot liner.

By the way, the above-mentioned conventional example has no problem when the first layer coil 2 and the second layer coil 3 do not intersect, but as shown in FIG. , The stripper 6 pushes up the first-layer coil 2 via the second-layer coil 3, the second-layer coil 3 separates the stripper 6 and the first-layer coil 2 from each other.
There is a problem that it will be pinched between and and compressed and damaged. This problem is likely to occur especially when the number of windings is large.

Further, since the coil end portion of the first layer coil 2 overlaps with the coil end portion of the second layer coil 3 (advancing side in the insertion direction), and further, the coil end portion is inserted into the magnetic iron core 1 in the overlapped state, the magnetic iron core 1 There is a problem in that the axial lengths of the coil ends on both sides of the coil are unbalanced, that is, the length of the upper coil end is short and the length of the lower coil end is long. The double layer coil 3 is remarkable. For this reason, after the coils are inserted, it is necessary to form the respective coil end portions into a predetermined shape and dimension, which requires a lot of labor, and moreover, quality variations are likely to occur.

Therefore, in order to solve the problems of the first conventional example, a second conventional example shown in FIGS. 3 and 4 has been proposed.
In this coil insertion device, the stripper is the first stripper 60.
It consists of A and the second stripper 60B. The first stripper 60A is located in the front part when the coil is inserted, and has the protrusion 10 on the substantially conical top surface which is the working surface thereof. The three protrusions 10 are formed so as to radially project, and a notch 11 having a space into which the second layer coil 3 can be fitted is formed between the protrusions 10. Second stripper 60B
Has a groove similar to the groove 6a of the stripper 6 shown in FIG. 1 and FIG. The first stripper 60A and the second stripper 60B have bolts 17
It is fixed to the rod 9 by. In FIGS. 3 and 4, the same reference numerals as those in FIGS. 1 and 2 represent the same or corresponding parts, respectively.

When the coil is inserted, this device lowers the stripper 6 to a position 6'shown by a chain double-dashed line in FIG.
The second layer coil 3 is fitted into the notch portion 11 of 60A, the second layer coil 3 is set on the second stripper 60B, and the second layer coil 3 is fitted into the notch portion 11 on the upper part of the stripper, respectively.
Further, the first layer coil 2 is placed and set on the protrusion 10 of the first stripper 60A. After that, both strippers 60A,
When 60B is raised, the protrusion 10 of the first stripper 60A pushes up the coil end portion of the first layer coil 2 to spread it out, and the second stripper 60B pushes up the second layer coil 3 to spread it out, and further the second stripper. The groove of 60B acts to press the first layer coil 2 and the second layer coil 3 into the slot 15. Therefore, the first and second strippers 60
Since A and 60B independently push up and spread both the first layer and second layer coils 2 and 3, respectively, the damage of the second layer coil 3 can be reduced, and the first conventional example shown in FIG. Compared to
As shown in FIG. 4, since the first and second strippers 60A and 60B have steps, it is possible to reduce the overlap between the first layer coil 2 and the second layer coil 3, so that the axial end in the coil end portion can be prevented. The balance can be reduced to some extent.

However, in this apparatus, since the coil end portion of the inserted first layer coil 2 shown by the solid line in FIG. 3 strongly abuts the protrusion 10 of the first stripper 60A to generate tension, the stripper 6 is pulled out. Therefore, when the stripper is lowered from the position shown by the solid line, there is a problem that a part of the first layer coil 2 bites into the gap between the inside of the tip of the blade 4 and the protrusion 10 and is damaged.

In order to solve this problem, the one disclosed in Japanese Patent Application Laid-Open No. 56-3554 (hereinafter referred to as the third conventional example) has been proposed. This third conventional example is not shown, but at each tip of the projection of the stripper, a coil flip-up portion is formed so as to face the gap of the blade, and the flip-up portion enters the gap of the blade to It is possible to prevent part of the layer coil from biting. However, in the third conventional example, since the flip-up portion is formed to have a narrow width so that it can be inserted between the blades 4, it has a sharp shape. There is a problem that the coil 2 is further damaged.

The second and third conventional examples are the first stripper.
The protrusion 10 is provided on the 60A, and the first layer coil 2 is pushed up by the protrusion 10 and is expanded, but since the protrusion 10 is in the ring formed by the blade 4, it is pushed up to the first layer coil 2. In addition, since the expansion is still insufficient and the coil end portion of the first layer coil 2 blocks the upper portion of the blade 4, the second layer coil 3 interferes with the coil end portion of the first layer coil 2 during the insertion process. , Blade 4
As a result of the upper part of the second layer coil 3 being pressed in the meantime, the second layer coil 3 may be damaged. This problem makes it difficult to insert a plurality of layers of coils in one step particularly when the coil pitch is large, when the coil is thick or linear, and when the coil space factor is high.

In such a case, the coils of the first layer and the second layer are sequentially inserted, that is, after the coil of the first layer is inserted, the coil end portion of the coil must be expanded and then the second layer coil must be inserted. No, it takes man-hours.

Furthermore, if you try to eliminate the above problems,
It is also easily conceivable to use the one disclosed in Japanese Patent Publication No. 28542 (hereinafter, referred to as a fourth conventional example).

In the fourth conventional example, a movable blade is used in addition to the blade, and the movable blade rises after a delay of the ascending operation of the stripper. It is designed to prevent damage to the layer coils.

However, in the fourth conventional example, since the movable blade moves with a certain time delay and a specific stroke due to the pusher when inserting the coil, the expansion of the coil end portion of the first layer coil is insufficient. In addition, the tip of the movable blade is tapered, and there is a risk of damaging the coil end portion of the first layer coil by moving with a delay, and further, the movable blade If the blade is used, the blade and the supporting base for mounting the blade are required, so that there is a problem that the number of parts is large and the structure is complicated accordingly.

Furthermore, as a fifth conventional example of the coil inserting device, Japanese Patent Publication No.
-34602 (hereinafter referred to as the fifth conventional example), the conventional example does not have the coil end portions of the first layer coil and the second layer coil intersecting each other. , There is no consideration about what is placed at the intersection.

In view of the above circumstances, an object of the present invention is to reliably reduce the damage to the coils of any layers even when inserting the coils of a plurality of layers, and when the coil pitch is large and the wire diameter is thick or thin. A coil that can be reliably inserted in one step even if the coil insertion condition is bad such as when the coil space factor is high, and that the coil end portion can be formed into a desired shape and dimension after the coil insertion. To provide an insertion device.

In order to achieve the above object, the present invention provides a blade corresponding to a slot of a magnetic iron core of a rotating electric machine and annularly arranged along an axial direction, and slidably held in the ring of the blade along the blade. And a stripper for inserting the coils of at least the first layer and the second layer whose ends are arranged to intersect each other into the slot of the magnetic core, and the stripper is provided at the front in the insertion direction of the coil. It consists of a first stripper located and a second stripper located in the rear part, the first stripper is a projecting portion that radially protrudes and can press the first layer coil along the coil insertion direction, and between the projecting portion. The second stripper has a notch into which the second layer coil can be fitted, and the second stripper can press the first layer coil and the second layer coil into the slot while providing a groove for fitting each blade on the outer circumference. In a coil insertion device having a shape, while forming a pressing piece by protruding the outer end of the protrusion of the first stripper to almost the inner peripheral position of the magnetic iron core, while removing the blade at the position facing the pressing piece, The first stripper and the second stripper are characterized by arranging a blade portion formed so that one end is continuous with the tip of the pressing piece and the other end is fitted in a groove corresponding to the pressing piece of the second stripper. is doing.

An embodiment of the present invention will be described below with reference to FIGS. FIG. 5 is a sectional view showing an embodiment of the coil inserting device of the present invention, corresponding to FIGS. 1 and 3, and FIG. 6 is an explanatory view corresponding to FIGS. 2 and 4, and FIG. FIG. 4 is a perspective view showing a stripper.

The coil insertion device of this embodiment, the stripper in the coil insertion direction, the first stripper 12 located at the front,
It comprises a second stripper 13 located at the rear part, and these first and second strippers 12, 13 are fixed to the tip of the rod 9 by bolts 17. The first stripper 12 projects radially about the axis and inserts the first layer coil 2 into the slot 15.
It has a projecting portion 10 that can be pressed to and a notch 11 for fitting the second layer coil 3 between the projecting portions 10 and is formed in a bullet shape. The second stripper 13 has the blades 4 on the outer periphery.
It has a groove 13a for fitting with, and its upper part is formed in a substantially conical shape so as to press the second layer coil 3 into the slot 15. The groove 13a is formed along the axial direction ZZ 'shown in FIG.

The difference between this example and the conventional example is that the slot of the magnetic core 1 is provided at the outer end of the protrusion 10 of the first stripper 12.
The pressing piece 12a is formed so as to extend almost to the inner circumference of the pressing piece 12.

As shown in FIG. 5 to FIG. 7, the pressing piece 12a has the outer end of the protrusion 10 protruding to the outer end side of the blade 4 with the same width as that of the protrusion 10 and having an inner diameter substantially equal to that of the slot 15. They are formed so as to have the same size and can be inserted through the inner circumference thereof. In this case, the inclined surface 12b of the upper portion (front portion in the coil insertion direction) of the pressing piece 12a is formed along the shape of the protrusion 10 as shown in FIG. 7, and when the first layer coil 2 is inserted, The coil end portion of the one-layer coil 2 is pushed up above the blade 4 to be expanded.

A notch 11 into which the second layer coil 3 can be fitted is formed between the pressing pieces 12a as in the conventional example.

Further, in this example, the use of the blade 4 at the position facing the pressing piece 12a of the first stripper 12 is abolished, and instead, the blade portion 14 is arranged between the first stripper 12 and the second stripper 13. Has been done. In FIG. 7, the blade portion 14 is formed in an elongated shape having a width similar to that of the pressing piece 12a of the first stripper 12, and the upper end thereof has the pressing piece 12a.
It is continuous with the tip of a and the lower part is fitted into the groove 13a in the second stripper 13. The upper end of the blade portion 14 is fixed to the pressing piece 12a by, for example, welding, bonding, pinning, screwing, etc., and the lower portion is the second stripper.
It is fixed to 13 by a fixing means such as a screw, and is arranged along the axial direction ZZ '.

Further, in order to make sure that the surface of the blade portion 14 in contact with the first layer coil 2 does not damage the first layer coil 2, as shown in FIG.
The contact surface with and is formed to be flat and curved to some extent, and in this example, the horizontal section has an elliptical shape. Then, lip portions 18 are formed on both sides of the lower portion of the blade portion 14 so as to surely guide the second layer coil 3 when the coil is inserted.

Further, the bottom surface of the first stripper 12 is formed flat, and the top surface of the second stripper 13 is also formed flat, so that the bottom surface of the second stripper 12 is superposed on the top surface of the second stripper 13 to form a stripper. I am configuring. The fifth
In FIGS. 7 to 7, the same reference numerals as those in the conventional example represent the same elements.

Since the coil insertion device of the embodiment has the above-mentioned configuration, the coil insertion operation will be described.

First, when inserting the coil, the blade 4 at a position corresponding to the pressing piece 12a of the stripper is deleted from each blade 4 in advance, and the apparatus is prepared. Next, the first stripper 12 and the second stripper 13 are respectively lowered to the descending positions 12 'and 13' shown by the two-dot chain line in FIG. 5, and in that state, the second and first strippers 13 and 12 are respectively Predetermined position 3 ',
The second layer coil 3 and the first layer coil 2 are set in 2 '. In this case, the second layer coil 3 has the cutout 11 of the first stripper 12.
Is set on the inclined surface of the second stripper 13 while the first layer coil 2 is attached to the inclined surface 12b of the first stripper 12.
Is set to.

After setting the coil in this way, when the stripper 12, 13 is moved up by driving the rod 9, the first stripper 12 presses the coil end portion of the first layer coil 2 along the insertion direction, and The second stripper 13 pushes and expands the coil end portion of the second layer coil 3 toward the outer peripheral side, and finally the first layer and the second layer coils 2 and 3 are the desired slots 15 of the magnetic core 1. Inserted inside.

When the first layer coil 2 is inserted, the pressing piece 12a is provided on the outer end of the projection 10 of the first stripper 12 so as to extend to almost the inner circumference of the slot 15 of the magnetic iron core 1 as described above. The pressing piece 12a can push up the coil end portion of the first layer coil 2 to the position above the blade 4 as the first stripper 12 moves up, and can push it out. Moreover, since the blade portion 14 is disposed between the pressing piece 12a and the groove 13a of the second stripper 13, the blade portion 14 is
Not only the first layer coil 2 expanded by 12a can be kept in an expanded state, but the second layer coil 3 is guided between the adjacent blades 4 and the coil 3 is inserted into the slot 15.
Since the second layer coils 3 located on both sides of the blade portion 14 do not come apart from each other so as to be mixed with each other, the second layer coil 3 is never caught in the magnetic core 1 at the time of insertion. Therefore, both the coils 2 and 3 can be surely spread to the outer peripheral position of the blade 4 by the cooperation of the pressing piece 12a and the blade portion 14.

Therefore, since the coil end portion of the first layer coil 2 can be spread to the outer peripheral position of the blade ring by the pressing piece 12a and the blade portion 14, as in the second and third conventional examples, the first layer coil 2 The coil end portion of the second coil 3 does not block the upper part of the blade 4, and the second layer coil 3 is inserted during the insertion process.
To prevent the upper end of the second layer coil 3 from being pressed between the blades 4 by the coil end portion of the first layer coil 2, and the pressing piece 12a extends to the inner peripheral side of the slot 15. Since it is overhanging, compared to the second conventional example, when the stripper is lowered to pull out,
There is no possibility that a part of the first layer coil 2 will bite into the gap between the pressing piece 12a and the inside of the blade 4 to be damaged, and that the pressing piece 12a is not provided with the flip-up part as in the third conventional example. Therefore, there is no fear that the first layer coil 2 will be damaged by the pressing piece 12a.
It goes without saying that the second layer coil 3 is sandwiched between the second stripper 13 and the second stripper 13.

As a result, it is possible to reliably prevent the first and second layer coils 2 and 3 from being damaged, and prevent the coil end portions of both coils 2 and 3 from becoming unbalanced.

In addition to this, since the blade portion 14 performs the same function as the blade 4 with respect to the second layer coil 3, that is, it serves as a guide when the second layer coil 3 is inserted.
Can be inserted into slot 15.

Furthermore, since the pressing piece 12a and the blade portion 14 are only provided in the stripper, it is not necessary to install any parts around the blade 4, and the movable blade as in the fourth conventional example is used. You can solve the problem.

Therefore, even if the coil insertion condition is bad, such as when the coil pitch is large, when the wire diameter is thick or thin, and when the coil space factor is high, the coils of both the first layer and the second layer are
The slots 2 and 3 can be reliably inserted into the slot 15 in one step.

In the illustrated embodiment, since the bottom surface of the first stripper 12 and the top surface of the second stripper 13 are formed straight and flat, respectively, compared to the second conventional example, both can be easily manufactured. The two can be assembled securely without a gap, and the device can be made inexpensive accordingly. Further, since the lip portions 18 are formed on both sides of the lower portion of the blade portion 14, the lip portions 18 guide the second layer coil 3 well, and the insertion of the second layer coil 3 becomes even better. .

8 to 10 show various modifications of the stripper.

In FIG. 8, the blade portion 14 'is not provided with a lip portion at all, and the blade portion 14' is formed smoothly over the entire length. The blade portion 14 'thus formed
Is suitable for use when the coil insertion conditions are good, such as when the number of windings is small or when the coil space factor is low.

In FIG. 9, the first stripper 12, the pressing piece 12a, and the blade portion 14 are integrally formed so that the assembly of the blade portion 14 to the first stripper 12 can be omitted. In FIG. 10, the upper end of the blade portion 14 may be extended further upward, and the upper end surface of the blade portion 14 may also serve as a part of the pressing piece 12a of the first stripper 12. In any case, the inclined surface A of the first stripper 12 and the blade portion 14
If the outer side surface B is smoothly connected, the same effect as that of the first embodiment can be obtained.

The embodiment is an insertion device for a three-phase, four-pole, 36-slot, three-stage concentric winding coil configured to insert the first-layer coil 2 and the second-layer coil 3 together in one step. However, it goes without saying that the present invention can be applied to a single-phase armature winding and also to a multi-layer coil using various windings in a multi-phase armature winding. Also, the blade part
If you tilt 14 slightly inward and give it a draft,
The stripper can be moved smoothly when the stripper is removed from the coil.

As described above, according to the present invention, by the pressing piece and the blade portion provided in the stripper, when the coil is inserted, the first layer coil is pushed up to the position above the blade and is expanded to the outer peripheral position of the blade. Can be inserted without damaging both sides, and when the stripper is pulled out,
Since it is configured to prevent the first layer coil from being sandwiched between the first stripper and the blade, it is possible to reliably prevent the first and second layer coils from being damaged, and the coil end portions of both coils are The structure does not become complicated because it prevents unbalance and only changes the stripper configuration. Therefore, when the coil pitch is large, when the wire diameter is thick or thin, the coil space factor is small. Even if the coil insertion condition is bad as in the case of the high temperature, the coil can be surely inserted into the slot in one step, and as a result, the reliability of the device can be surely improved.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a first conventional example of a coil insertion device, and FIG. 2 is a plan view showing a state in which both coils are set in the coil insertion device of the first conventional example and a state in which both coils are inserted.
FIG. 3 is a vertical sectional view showing a second conventional example of the coil inserting device, and FIG. 4 is a plan view showing a state in which both coils are set in the coil inserting device of the second conventional example and a state in which both coils are inserted. Is. FIG. 5 is a vertical sectional view showing an embodiment of the coil inserting device of the present invention, FIG. 6 is a plan view showing a state in which both coils are set in the coil inserting device and a state in which both coils are inserted, and FIG. FIG. 8 is a perspective view showing a stripper in the embodiment, and FIGS. 8 to 10 are perspective views showing various modifications of the stripper. 1 ... Magnetic core, 2 ... First layer coil, 3 ... Second layer coil, 4 ... Blade, 8 ... Base, 9 ... Rod, 10
...... Protrusions, 11 ...... Notches, 12 ...... First stripper, 12
a …… Pressing piece, 13 …… Second stripper, 13a …… Groove, 14,1
4 '... Blade part, 15 ... Slot.

Claims (3)

[Claims] 1. A blade, which corresponds to a slot of a magnetic iron core of a rotating electric machine and is annularly arranged along the axial direction, and slidably held along the blade in the ring of the blade, and has an end portion. At least a first layer arranged crossing each other,
And a stripper for inserting the coil of the second layer into the slot of the magnetic iron core, the stripper comprising a first stripper located at the front part and a second stripper located at the rear part in the insertion direction of the coil, The one stripper has a protrusion that radially protrudes and can press the first layer coil along the coil insertion direction, and a notch that can fit the second layer coil between the protrusions. In the coil insertion device having a shape capable of pressing the first layer coil and the second layer coil into the slots while providing a groove for fitting each blade on the outer periphery, the outer side of the protrusion of the first stripper While forming the pressing piece by protruding the end to almost the inner peripheral position of the magnetic iron core, the blade at the position facing the pressing piece is deleted, and one end is provided between the first stripper and the second stripper. The coil insertion device is characterized in that a blade portion is arranged so as to be continuous with the pressing piece and the other end is fitted in a groove corresponding to the pressing piece of the second stripper. 2. The coil inserting device according to claim 1, wherein the pressing piece and the blade portion are integrally formed. 3. The coil inserting device according to claim 1, wherein the pressing piece and the blade portion are formed as separate bodies.