JPS5932343A - Coil inserter - Google Patents

Abstract

PURPOSE:To prevent coils from being damaged by such an arrangement wherein a pair of stripper are added to a conventional coil inserter and interference between coil ends is lessened by the strippers when plural layered coils are inserted. CONSTITUTION:A stripper 13 having a substantially conical top surface is installed to a conventional coil inserter equipped with a magnetic core 1, No.1 layer coil 2, No.2 layer coil 3, blade 4, wedge guide, wedge pusher, etc., and on the stripper 13, another stripper 12 on which 3 pieces of radial pressing tongue 12a are formed is arranged and fixed. With this structure, the coil end portion of No.1 layer coil 2 and that of No.2 layer coil 3 can be independently inserted, pressed and formed by the stripper 12 and the second stripper 13 respectively, therefore coils 2, 3 will not be damaged any more even it they are storongly pressed by inserting force.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coil insertion device for inserting a pre-wound multilayer coil into a slot of a magnetic core of a rotating electric machine in one step.

FIG. 1 is a vertical sectional view of an example of this type of coil insertion device commonly used in the past, and FIG. 2 is a plan view of the same.

The blades 4 are arranged in an annular manner in alignment with the slots 15 of the magnetic core 1, and their lower ends are connected to the base 8 by pins (not shown). A wedge guide 5 is arranged in an annular manner on the outside of the blade 4.

The stripper 6 is a block having a conical slope, and is attached to the upper end of the g-rad 9 by a bolt 17. The above rod 9 is a driving means such as a hydraulic cylinder (not shown)
This is because it is driven up and down. A groove 6a is formed on the outer circumferential surface of the stripper 6 in the direction of the fine center (hereinafter simply referred to as the axis) of the magnetic core 1, and this 46m is formed in the blade 4.
It is slidably fitted. A wedge gripper 7 is provided between the wedge guides 5 arranged in an annular manner, and is driven up and down by a driving means (not shown) such as a hydraulic cylinder to slide up and down along the wedge guides 5. It looks like this.

To insert a coil into the slot 15 of the magnetic core l using the conventional coil insertion device configured as described above,
Move the stripper θ to the lowered position 6' shown by the two-dot chain line, and move the wedge to a predetermined position ft16' on the wedge guide 5.
After setting the second JvI coil at a predetermined position 113' on the blade 4, move the first layer coil to a predetermined position 2.
’ to seven.

Next, the inner diameter of the magnetic core I is fitted into a ring formed by a large number of blades 4, and fixed by a core holder R (not shown).

“ With the above preparations, when the stripper is raised from the lowered position 6′ shown by the double-dashed line to the 6th position reed shown by the solid line, the stripper at the 3′ position set above the stripper at the 6′ position The two-layer coil and the MN-coil set above it at the 2' position are pushed up and inserted into the slot of the magnetic core I. Simultaneously with the above operation, the wedge button 7 is raised and the wedge 16' Insert it into the t slot.

In the conventional coil insertion device described above, if the first layer coil 2 and the second layer coil 3 do not intersect, there is no problem with separate installation, but as shown in FIG. ′
and the second layer coil 3' intersect at the coil end, the stripper 6 pushes up the first layer coil 2 via the second layer coil 3, so the second layer coil 3 crosses the stripper 6. There is a risk that it may be compressed and damaged by being pinched between the coil 2 and the first layer coil 2. Especially when there is a large amount of winding, the second
The layer coil 3 is easily damaged. In addition, the coil end portion of the first layer coil 2 overlaps the coil end portion of the second layer coil 3 (on the forward side with respect to the insertion direction), and the length in the axial direction of the coil ends on both sides of the magnetic core l is It becomes unbalanced. For this reason, after the coil is inserted by the coil insertion device, a lot of labor is required to mold the coil end portion into a predetermined shape and size, and furthermore, the quality tends to vary.

In order to overcome the drawbacks of the conventional coil insertion apparatus described above, an improved coil insertion apparatus as shown in FIGS. 3 and 4 has been proposed. In this device, a protrusion 10 is integrally connected to the substantially conical top surface which is the working surface of the stripper 60. The protrusion 10 described above has three radial protrusions, and a cutout 11 is formed between each protrusion to provide a space into which one layer of coil can be fitted. In this conventional improved coil insertion device, the first layer coil 2 is pushed up and spread by the projection lO, the second layer coil 3 is pushed up and spread by the main body of the stripper 6, and then the IJ collar 6 Since the outer circumferential portion of the first layer coil 3 acts to press the first layer coil and the second layer coil into the slot, damage to the second layer coil 3 is reduced and coil loss is reduced.

However, the inserted first layer coil 2 shown in solid line in Fig.
The coil end portion strongly contacts the protrusion m10 of the stripper 6 and generates tension, so when the stripper is lowered from the position of the stripper 6 shown by the solid line, the tip of the blade 4 and the protrusion IO There is a drawback that a part of the winding of the first layer coil 2 gets stuck in the gap and is damaged.

Although a coil insertion device has been proposed which eliminates this drawback (winding digging), there is a risk that the first layer coil 2 may be damaged due to the sharp edges provided on the outer surface of the protrusion 10.

In addition, in the conventional improved coil insertion device shown in FIGS. 3 and 4, the coil end portion of the first layer coil 2 is pushed and expanded by the protrusion IO during the coil insertion process, and the magnetic core 1
However, since the outer surface of the protrusion 10 is within the ring of the blade 4, the coil end of the first layer coil 2 comes to rest on the upper m of the blade 4. For this reason, there is a risk of damage to the coil as the upper part is pressed between the blades, especially when the coil pitch is large, the center wire diameter is thick or thin, etc.
When the coil space factor is high, it becomes difficult to insert the coated coil in one step.

In such cases, conventionally, after inserting the first layer coil,
The coil end portion is expanded and molded, and then the second layer coil is inserted. In addition, in order to prevent the above-mentioned problem (damage to the second layer coil), we have also developed an improved coil insertion device that uses a movable blade (not shown) that operates later than the stripper to push the coil end apart. However, since the stroke of the movable blade is subject to structural limitations, the coil end part cannot be pushed out sufficiently, and the tip of the movable blade may damage the coil end part of the first no-coil. There are problems such as the possibility of

In addition to the above, a coil insertion device has also been proposed in which the above-mentioned problems are solved by using a double structure of the stripper, but in this device, the upper stripper must be attached and removed in conjunction with the coil insertion operation. This requires a great deal of time and effort, and automation is not easy.

The present invention has been made in view of the above circumstances, and can significantly reduce interference between coil ends when inserting a laminated coil, and when the coil pitch is large or the inner diameter is thick or thin,
Even in laminated coils with poor coil insertion conditions, such as when the coil space factor is high, the coil can be inserted in one step without the risk of damage, and the coil end can be easily formed into the specified shape and dimensions after the coil is inserted. Our aim is to provide a complete coil insertion device that can be used for any purpose.

In order to achieve the above object, the coil insertion device of the present invention has the following features:
This is a device for inserting a pre-wound multi-layer coil into the slot 1 of a magnetic core of a rotating electric machine in one step, and it consists of a ring made of a plurality of blades that hooks and holds the coil, and the ring described above. (IL) In a coil insertion device of a type that is equipped with a stripper driven in the axial direction of the magnetic core within the ring, and inserts the coil by the stripper into the slot of the magnetic core fitted in the ring, (IL) the above-mentioned (b) Of the two stripper blocks, the first stripper is located on the forward side with respect to the coil insertion operation. teeth,
The outer periphery is equal to the inner diameter of the magnetic core, and a notch is formed that can be inserted into the inner diameter and allows one layer of coil to pass through. (d) forming a number of grooves parallel to the axial direction on the outer periphery of the IJ collar, and (d) forming a groove on the outer periphery of the IJ stripper on the forward side of the stripper; Fix the blade so that it is continuous with the surface of
A feature is that this blade is fitted into the above-mentioned groove.

Next, an embodiment of the present invention will be described with reference to FIGS. 5 to 7. The fifth factor is the conventional 'type device 0 'C in the vertical cross-sectional view.
i FIG. 6 is a plan view of a conventional device; FIG.

FIG. 4 is a diagram corresponding to FIG. 4; Magnetic core 1, first layer coil 2, second layer coil 3, which have the same drawing reference numbers as the conventional device. Blade 4. Wedge guide 5. Wedge grip 7, base 8. Rod 9° and wedge 16 are similar components to those in conventional devices.

The first stripper 12 has three radial suppressing pieces 12m formed on the second stripper 13 having a substantially conical top surface.
and fix it with bolts 17. In this embodiment, a stripper is constructed by arranging and fixing two stripper blocks concentrically as described above.

The second stripper 13 in this embodiment corresponds to the IJ collar 6 in the conventional device shown in FIG.
The stripper 12 is a member corresponding to the protrusion lO of the conventional device, but the first difference is that the lower surface of the protrusion 10 of the conventional type is in close contact with the conical top surface of the conventional stripper 6. Although it was an integral structure, it was formed into a flat surface, and this was stacked on top of the conical top surface of the second stripper 130 to create a two-tiered structure.

The second point in which the IJ collar 12 of this embodiment differs from the protrusion 10 of the conventional device is that the outer surface of the protrusion IO is formed so as to be in sliding contact with the inside of the blade 4. The first circumference m of the first stripper 12 of the present invention extends to approximately the same position as the outside of the blade 4, is approximately equal to the inner diameter of the magnetic core l, and is configured to be able to be inserted into the inner diameter of the NJ.

This device is similar to the conventional device shown in FIG. 3 in that a notch 11 through which one layer of coil can pass is provided between the three radial suppressing pieces of the first stripper 12. The meaning of passing through the coil for one layer will be explained in detail when explaining the operation.

FIG. 7 is a perspective view of the first stripper 12 and the second stripper 13 of this embodiment. The N2 stripper 13 has a large number of grooves 13& formed in its outer periphery in the 111Z-Z' force direction. This #13m has blade 4 and
This is for fitting the moving blade described next.

The third point in which this embodiment differs from the conventional device is that three movable blades 14 are formed and fixed to the outer periphery of the 8AI stripper 12. This moving blade 14 is different from the blade 4 in the conventional device, and the moving blade 14 is different from the blade 4 in the conventional device.
Since the stripper is fixed to the stripper, it is a member that moves up and down together with the stripper when it is driven up and down.

The basic shape of the first stripper is a cannonball shape, but there are three
Since the notch portions 11 are provided at different locations, the shape has three radial vertical wing-shaped suppressing pieces 12a. Three moving blades 14 are formed, and the outer peripheral part of the first stripper 12,
That is, it is firmly mounted below the three vertical wing-shaped suppressing pieces 12m in parallel with the axial direction z-z', and the outer surface of the upper end thereof is smoothed against the surface on the forward side (upper side in the figure) of the stripper 12. Make it continuous. Then, the lower part of the movable blade 14 is fitted into the groove 13a of the second stripper 13. Therefore, the relative position of the first stripper 12 and the second stripper 13 in the radial direction is regulated by the moving blade 14. The movable blade 14 is fixed to the first stripper 12 by bath welding or adhesive.

Fixing means such as bottle fixing or screw fixing can be used. Furthermore, the other end of the movable blade 14 is secured with a screw or the like.
It may be fixed to the second stripper 13 by means of an I+ constant.

In this embodiment, the number of installed blades 4 is reduced by three compared to the conventional device shown in FIG.
The # movable blade 14 is fitted into the book, and the blade 4 is fitted into the other grooves 13a.

In order to insert the first layer coil 2 and the second layer coil 3 into the slot 15 of the magnetic core l using the coil insertion device configured as described in 2 below, the steps shown by the two-dot chain line in FIG. 12'
, 13', the first stripper 12 degrees and the second stripper 13 are lowered at 2' as shown by the imaginary line.

1st layer coil 2 at position 3'. Second layer coil 3't-set. In this embodiment, three first layer coils 2' and three second layer coils 3' are set and inserted as shown in FIG. ' is inserted into one fixed position between the blades 4 and moved downward +1iT= along the blade 4, the first stripper page 12

14
workman.

Since the notch 11 is formed in the first stripper 12, the first stripper 12 contacts the top surface of the stripper 13 without interfering with the first stripper 12. Notch 1
The shape of No. 1 is formed so that one layer of the coil can pass therethrough as described above. One side of the first layer coil 2' is the first layer coil 2'.
It is set so as to rest on the pressing surface 12b of the pressing piece 12a of the stripper 12.

When the coil is set as described above and the first stripper 12 and the second stripper 13 are raised, the first stripper 12 pushes up the first layer coil 2 with its pressing surface 12b. The pushed-up first layer coil is guided by the blade 4 and inserted into the slot 15 of the magnetic core 1 in the axial direction,
At a point where the blade 4 is removed from the upper end, the suppressing surface 12a of the first stripper 12, the outer circumferential surface of the first stripper 12, and the movable blade 1
The coil end portion is pressed and molded toward the outer circumferential side by the outer surface of No. 4.

As described above, when the first stripper 12 rises, the second stripper connected to it rises while pushing up the second layer coil 3, and at the same time lifts the pushed up first layer coils 2 and W and second layer coil 3. When the second layer coil 15'6r3 is removed from the upper end of the blade 4, the second stripper 13
The coil end portion is formed by pressing EE toward the outer circumferential side using the top surface and the outer circumference H1i.

As is clear from the above-mentioned action, the coil end portion of the first layer coil 2 is inserted and pressed by the first stripper 12, and the coil end portion of the second layer coil 3 is inserted and pressed by the second stripper 13. Therefore, there is no risk that the first layer coil 2 and the second layer coil 3 will be strongly pressed together by the force of the insertion operation and be damaged.

Moreover, the outer circumference of the mI stripper 12 of this embodiment has a radius larger than that of the protrusion 10 in the conventional device t (FIG. 3) by a dimension corresponding to the width of the blade 4;
Since the coil end of the coil 2 is sufficiently expanded and molded, interference between the coil ends of the first layer coil 2 and the second layer coil 3 is greatly reduced, and the second layer coil 3t can be inserted smoothly. I can do it.

Furthermore, the outer circumference of the first stripper 12 and the movable blade 14
Since the outer surface of the blade 4 is smoothly continuous, there is no risk of the coil being bitten between the stripper and the blade 4 and being damaged when the first stripper 12 and the second stripper 13 descend. In the conventional technology, insertion was difficult, especially when the coil pitch was large, the coil wire diameter was thick or thin, or the coil space factor was high.
If this embodiment is applied, even if the insertion conditions are bad, two layers of coils can be easily inserted in one step as described above, and there will be no imbalance in the axial length at both coil ends, so the coil insertion process After that, the coil end can be easily molded to the desired shape and dimensions.
It greatly contributes to reducing man-hours and improving quality.

Next, an embodiment different from the above will be described in comparison with the previous example.

The moving blade 14 in this embodiment has a lip portion 18 formed therein as shown in FIG. This lip part was also provided in the blade of the conventional device, but in the previous example, the part that abuts the coil end part of the first layer coil 2 ( It is desirable that the upper part (upper part) be formed smoothly without providing a lip part 18t. In the embodiment shown in FIG. 8, the moving blade 14' is not provided with any lip portion and has a smooth shape.In the case where the moving blade +41=14!jM is small as in this example, or when the coil occupancy It is suitable for use when the coil insertion conditions are good, such as when the rate is low.

Also,#! As in the embodiment shown in FIG.
2 and the moving blade 14 may be formed into an integral structure. Further, as in the embodiment shown in FIG. 10, the moving blade 4 is extended upward, and the upper end surface of the moving blade
A part of the suppression surface of the stripper 12 may also be used. The above-mentioned function can be achieved by arranging the sloped surface at the top of the first stripper 12 and the outer surface B of the movable blade 14 to be smoothly continuous.

The above-mentioned embodiment is an insertion device for a 3R concentric winding with a 3-phase 4-pole audience slot configured to insert the first layer coil and the second layer coil in one step, but the present invention is a single-phase insertion device. It can be applied to armature windings and multilayer coils with various winding specifications in multiphase armature windings. Also, the above-mentioned moving grade 14 is tilted inward and it is removed by GM 4? 18.

As detailed above, according to the present invention, interference between coil ends is significantly reduced when inserting a multilayer coil, and when the coil pitch is large or the wire diameter is thick or thin,
Even in multilayer coils with poor coil insertion conditions, such as those with a high coil space factor, the coil can be inserted in one step without the risk of damaging the coil, and the coil end can be adjusted to the specified shape and dimensions after the coil is inserted. Excellent practical effects can be obtained in that it can be easily molded.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view of an example of a conventional coil insertion device, Fig. 2 is a plan view of the same, Fig. 3 is a vertical sectional view of an example of a conventional coil insertion device different from the above, and Fig. 4 is a plan view of the same. It is. FIG. 5 is a vertical sectional view of one embodiment of the coil insertion/insertion device of the present invention, and the sixth factor is a plan view of the same. FIG. 7 is a perspective view of the first stripper and second IJ collar in the above embodiment, and FIGS. 8 to 10 are perspective views of the first stripper and second stripper in embodiments different from the above. . ■...Magnetic core, 4...Blade, 8...Base,
9... Rod, 10... Projection, 11... Notch, 12... First stripper, 13... Second stripper, 14, 14'... Moving blade, 15... slot. Representative Patent Attorney Masami Akimoto Figure 1 No. 7 No. 2 9th cause 10th cause

Claims (1)

[Claims] A magnetic core fitted with the ring, comprising a ring made of a plurality of blades that hooks and clamps the coil, and a stripper driven in the axial direction of the magnetic core within the ring. A coil insertion device of a type in which a coil is inserted into a slot using a stripper, characterized in that the coil insertion device is provided with four missing sections. (a) The stripper is constructed of two stripper blocks arranged concentrically in the axial direction of the magnetic core. (b) Of the two stripper blocks mentioned above, the first stripper located on the forward side with respect to the coil insertion operation is
The outer periphery is approximately equal to the inner diameter of the magnetic core and has a notch that can be inserted into the inner diameter and allows one layer of coil to pass through. (C) Among the two stripper blocks, a large number of grooves parallel to the axial direction of the magnetic core are formed on the outer periphery of the second stripper C1 located at the rear with respect to the coil insertion operation. (d) A blade is fixed to the outer periphery of the first stripper so as to be continuous with the advancing side surface of the stripper, and the blade is fitted into the groove.