JPH04217843A - Coil inserter - Google Patents

Abstract

PURPOSE:To provide a coil inserter which can easily achieve high space factor of stator coil in a slot by clamping arranged stator coils. CONSTITUTION:A plurality of clamp guides 52 arranged in circle are driven vertically on the inner surface of a base together with a stator core 46. Stator coils 51 are arranged radially inward while opposing to a clamp guide 52 and inserted, with predetermined inclination, into a slot 46a by means of a coil clamper 48 while being held by the inner surfaces of the clamp guides 52. A plurality of blades 68 have identical profile to the clamp guide 52 and driven vertically on the inner surface of the base. After arranged insertion by means of the coil clamper 48, it ascends to form a gap for allowing sliding of a stripper 66 and thereby the stator coil 51 can be pushed into a slot 46a.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil insertion device for inserting a stator coil of a rotating electric machine into a slot of a stator core, and more particularly to an improvement in a mechanism for inserting a stator coil into a slot.

0002

[Prior art] As a prior art, Japanese Patent Publication No. 63-43988
A device described in the above publication is known. FIG. 11 is a diagram showing a state of a conventional coil insertion device before coil insertion. The configuration of this figure will be explained. This figure shows, for example, a blade 11 consisting of 12 blades, a ring body 13 in which the blades are arranged in a ring at predetermined intervals, a bed plate 14 to which the ring body 13 is fixed, and a ring body 13 fixed to the bed plate 14. A ring holder 15 and a stripper 1 that moves back and forth inside the ring.
6, 12 projections 17 formed on the outer periphery of the stripper 16 and engaging with gaps in the ring body 13, and projections 1
A notched corner portion 18 formed at the upper end of the stripper 16, a wedge pusher 19 integrally protruding from near the lower end of the stripper 16, and a drive to which the stripper 16 is fixed and is driven forward and backward in the vertical direction by a hydraulic cylinder (not shown). A shaft 20, a stator core 21 fitted into the blade 11, a large number of slots 22 in the stator core 21, and a stator coil 2 inserted into the slots 22.
3 and slot 2 for fixing the stator coil 23.
2. The wedge 24 is inserted into the wedge 24.

Next, the operation will be explained. In order to insert the stator coils 23 and wedges 24 into the many slots 22 in the stator core 21 using the coil insertion device having the above configuration, the wedges 24 are loaded into the wedge pusher 19, and the stator coils 24 are inserted into the gaps between adjacent blades 11.
3 is hooked and held, and the stator core 21 is fitted to the outer periphery of the blade 11.

FIG. 12 is a diagram showing the state of the conventional coil insertion device after the coil is inserted. When the drive shaft 20 was raised by the hydraulic cylinder as shown in this figure, the stator coil 23 was pushed up by the cutout corner 18 of the stripper 16 and inserted into the slot 22.

[0005]

[Problem to be Solved by the Invention] However, in response to the increasing demand for sophistication of products such as smaller size, lighter weight, and higher output in recent years, conventional coil insertion devices have attempted to increase the space factor of the coil. Then, the following problem occurred. FIG. 13 is a partial side view showing a coil insertion process using a conventional coil insertion device. In this figure (a), the plurality of stator coils 23 are pushed up by the cutout corner portions 18 of the stripper 16 and inserted into the slots 22. Further, when the stator coil 23 is pushed up by the notched corner part 18, it is spread out as shown in FIG. The stator coil 23 is easily misaligned with the part far away from the stator coil 23, and the stator coil 23 is
), the width of the stator core 21 was wide in the direction from the inner diameter to the outer diameter, and the arrangement was irregular.

FIG. 14 is a partial plan view showing how the stator coil is inserted. This figure shows the stator coils 23 inserted into every two slots 22 together with the wedges 24 in the plurality of slots 22 of the stator core 21, and the projections 11 of the stripper 16 into which the stator coils 23 are inserted.
and a gap 25 between the blades 11 through which the protrusion 11 passes. As shown in this figure, the conventional coil insertion device has a problem in that it is necessary to consider the wide and disorderly arrangement of the stator coils 23 within the slot, and the space factor cannot be increased accordingly.

Furthermore, since the coil 23 and the wedge 24 are driven at the same time, the spacing is determined by the jig, so the range in which they can be inserted into stators with different axial lengths is narrow, and when the coils are inserted, they are press-fitted all together between the fingers. This results in increased friction (insertion force of 2,000 to 4,000 kg), and since a tool is used to position the stator, it becomes difficult after inserting one or two layers, and the coil needs to be modified to avoid interference with the tool. There was a problem.

[0008] Therefore, the required number of stator coils 23 are currently inserted into the slots 22 at the same time as the wedge 24, but for product quality reasons, the required number of stator coils 23 are not inserted into the same slot at once, but are inserted multiple times. I needed to insert it. However, in the conventional method, since the wedge 24 is inserted at the same time, there is a problem that if the coil is inserted in parts, the coil will protrude from the inserted slot.

Therefore, in view of the above problems, it is an object of the present invention to provide a coil insertion device that can easily achieve a high space factor in the slot of a stator coil.

0010

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a coil insertion device including a clamp guide,
It has a coil clamper and a blade. The clamp guides are composed of a plurality of clamp guides that drive the inner surface of the stator core and the inner surface of the base body up and down, and are arranged in an annular shape with a gap maintained between them. The coil clamper is disposed radially opposite to the clamp guide and swings to sandwich the stator coil. In this sandwiching, the coil clamper clamps the internal coil located inside the inner surface of the base among the stator coils that are wound and clamped in the gap between the bases. The blade slides on the inner surface of the base body, moves forward and backward together with the stripper, and has the same cross-sectional shape as the clamp guide. The clamp guide may be driven forward and backward in synchronization with the blade.

[0011]

[Operation] According to the coil insertion device of the present invention, the base body with the stator coil set in the gap rises and comes into contact with the lower surface of the stator core, and the clamp guide descends and slides along the inner surface of the stator core and the inner surface of the base body. The blade is slid along the inner surface of the base together with the stripper, and its tip is brought into contact with the tip of the clamp guide. Next, the coil clamper swings radially, inserts the inner coil of the stator coil between it and the clamp guide, and moves upward, so that the outer coil of the stator coil approaches the outer surface of the base body and is drawn to the lower surface of the stator core. A layer is drawn into the slot. Therefore, since the retraction angle of the stator coils when inserted is also large, the stator coils are arranged in a vertical line on the retraction side. Subsequently, the coil clamper unclamps the stator coil and raises the clamp guide, and then the stripper and wedge pusher are raised to push the stator coil into the slot through the blade gap and insert the wedge. In this way, the stator coils arranged in alignment can be inserted while being clamped and retracted without accurately breaking them.

[0012] Thus, before applying an insertion load to the stator coil, the stator coil is clamped, most of the stator coil is pulled up into the slot, and the rest is pushed in with the stripper, which makes it easier to start insertion than in the conventional case. This prevents the stator coil from shifting, and since the stator coils from the bottom of the stator core are aligned and there is no contact with the stripper during insertion, the stator coil inserted into the slot maintains its straightness. It becomes possible to produce products with lower resistance and higher space requirements.

The above is the effect of the plurality of coils inserted into the slots of the stator core at the same time as the wedges. Next, regarding the effect that the coil does not protrude from the stator core slot even if the wedge and the coil are not inserted at the same time, the insertion order is the same as when the plurality of coils are inserted at the same time as the wedge.
What is different is the action after the push-in insertion. When the stripper 66 rises to the push-insertion length l, the coil is inserted into the slot, but as in the conventional case, the stripper 66 and the blade If the stripper 68 is lowered, the coil will protrude from the slot into which it has been inserted, so the clamp guide 52 used for retraction and insertion is lowered again to the upper surface of the stripper 66. Next, by lowering the clamp guide 52 in synchronization with the lowering of the stripper 66 and the blade 68, the internal coil 51c is guided by the clamp guide outer surface 52c, and the coil 51 that has entered the slot by being pushed toward the outer circumference of the core is removed from the core. The purpose is to be held by the clamp guide 52 without protruding. As a result of the above action, even if the wedge and coil are not inserted at the same time, the coil can be inserted without protruding from the slot of the stator core, the number of inserts is less than half compared to the conventional method, the insertion load is small, and in combination with retractable insertion, a higher quality product can be achieved. It becomes possible to generate.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view of a coil insertion device according to an embodiment of the present invention. The overall configuration of this figure will be explained. This figure shows a wedge holder 41 and a wedge holder 12 as a base for aligning and holding the stator coil before inserting the stator coil, which will be described later.
An annular body 42 having a book wedge holder 41, bolts 43 that evenly connect the wedge holder 41 to the outer periphery of the annular body 42, a plate 44 to which the annular body 42 is bolted and rotationally positioned, and a core holder 45. , core holder 4
A stator core 46 is fitted into a stator core 46 and positioned by an outer circumferential groove of a core holder 45 (not shown), a slot 46a of the stator core 46 that contacts each wedge holder 41 at its center, and a holding jig 4 that is a thrust holder for the stator core.
7, a plurality of clampers 48 arranged radially, an inner slope 48a provided on each clamper 48, and a clamper 48.
Ring cam 49 that provides driving force to 8 and inner slope 48a
The cam surface 49 of the ring cam 49 presses on the wedge principle.
a, a bolt 50 connecting the ring cam 49, a stator coil 51 inserted into the slot 46a, and a stator coil 51 that is slidable on the inner surface of the base body consisting of the wedge holder 41 and the inner surface of the stator core 46, and between the clamper 48. A clamp guide 52 that clamps the clamp guide 52, a fulcrum 53 of the clamper 48 that is held parallel to the clamp guide 52, a bolt 54 that fixes the clamp guide 52, and the clamp guide 52 is arranged in an annular shape with an interval maintained by the bolt 54 on the outer periphery of the clamp guide 52. A holder 55 is coupled to the ring cam 49, a rod 56 is coupled to the ring cam 49 with a bolt 50, a base 57 is coupled to the holder 55 with the bolt, and the ring cam 49 is driven via the rod 56 etc. a clamp cylinder 58 that is fitted into the holder 55 and that allows the rod 56 to slide; and a base 57 that is provided with a forward and backward drive that allows control of the position of the base 57 itself (not shown); A guide bar 64 is rotationally positioned so that the movement of the base 57 causes a series of movement of the coil clamper 48, clamp guide 52, etc.
and a bolt 65 that fixes the base 57 to the holder 55.
A stripper 66 that moves up and down along the inner surface of the ring body 42, a bolt 67 that connects the stripper 66, and a wedge holder 41 that slides on the inner surface of the base body and has the same cross-sectional shape as that of the clamp guide 52. A blade 68 which is a blade 68 , a bearing box 69 which maintains coaxiality with the axis of the stripper 66 , a bearing 70 housed in the bearing box 69 , and the stripper 66 are fastened by a coupling bolt 67 and the bearing 70 is
a drive shaft 71 supported by a drive shaft 71, a bolt 72 that connects the blade 68 to the outer peripheral surface of the bearing box 69, a bolt 73,
74, a plate 75 that moves forward and backward and can control its own position (up and down) and is fixed to the bearing box 69 with a bolt 73; and a plate 75 that rotationally positions the plate 75 and is fixed to the plate 75 with a bolt 74. A guide bar 76 , a hydraulic cylinder 77 that drives the drive shaft 71 , a wedge 78 housed between the adjacent wedge holders 41 , a protrusion 80 provided around the circumference of the stripper 66 , and a wedge provided on the bottom surface of the stripper 66 A wedge pusher 81 having a size equivalent to the thickness of the stripper 78 and protruding toward the outer circumference of the stripper 66, a notched corner 82 formed at the upper end of the protrusion 80, and a connecting bolt that fixes the wedge pusher 81 to the bottom surface of the stripper 66. 88.

[0015] The details of each main part of this embodiment will be explained. FIG. 2 is a diagram showing details of each main part in FIG. 1. This figure includes a coil clamp section A, a stator core holding section B, a stator coil and wedge holding section C, and a coil stripper section D. In the coil clamp part A, the coil clamper 48 is rotatable about the fulcrum 53, and the cam surface 49a of the ring cam 49 pushes the inner slope 48a of the coil clamper 48 against the downward movement of the rod 56, so the coil clamper 48 pushes against the wall of the clamp guide 52. towards the other rod 5
Cam surface 49b of ring cam 49 for upward movement of 6
presses the inner surface 48b of the coil clamper 48, so that the coil clamper 48 moves away from the wall of the clamp guide 52. The outer surface of the clamp guide 52 has a section 52a.
, an outer surface 52c and a tip 52b. Third
The figure is a diagram showing the relationship between a coil clamper, a clamp guide, and an inserted coil. As shown in this figure, 12 clamp guides 52 are arranged in an annular shape, and a clamp guide gap 86 is provided between them through which the stator coil 51 passes, and the clamp guide positions the slot entrance of the stator core 46 on the outer surface 52c. A positioning protrusion 52d is provided, six coil clamps 48 are arranged radially every other time facing the clamp guide 52, and the internal part 51c of the stator coil 51 is disposed between them.

In the stator core holding section B, the core holder 45
The stator core 46 is attached to the stator coil 5.
The stator core 46 is provided with a slot 46a for accommodating the stator coil 51, and the upper and lower sides of the core are defined as a core lower surface 46b and a core upper surface 46c. Blade 4 in stator coil and wedge holding part C
In the wedge holder 41 equipped with the annular body 42 coupled to the stator 4, the wedge 78 is loaded into the groove of the wedge holder, and the stator consists of a circumscribed coil 51a, a coil intermediate layer 51b inserted into the slot 46a, and an internal coil 51c to be clamped. The coil 51 is set, the wedge holder tip is in contact with the core lower surface 46b, and the wedge holder inner surface 41b
The clamp guide outer surface 52c slides in along. FIG. 4 is a diagram showing the relationship among the stripper, clamp guide, stator core, and stator coil. As shown in this figure, the stator core 46 is provided with a plurality of slots 46a into which the stator coils 51 are inserted, and the slot entrances 84 of the slots 46a face the gaps 86 of the clamp guides 52 at every second slot 46a. The slot 46a is inserted into the gap 8 of the clamp guide 52 by the protrusion 80 of the stripper 66.
6 and accommodates the stator coil 51 that is pushed in. In the vicinity of the slot entrance 84, the wedge 78 is raised by a wedge pusher protrusion 81a and inserted in the vicinity of the slot entrance 84, and prevents the stator coil 51 inserted into the slot from exiting from the slot entrance 84. Note that the protrusion 52D of the clamp guide 52 fits into the other slot entrance 84 as shown in the figure, and is useful for positioning the clamp guide 52.

In the coil stripper section D, a stripper 66 for inserting the stator coil 51 and a wedge pusher 81 for inserting the wedge 78 are combined. 48 and vertical movement are synchronized. In order to guide the stator coil 51 to the slot 46a, the blade 68
The blade tip 68a contacts the clamp guide tip 52b. FIG. 5 is a diagram showing the relationship between the wedge holder, the blade, and the inserted coil.

As shown in this figure, 12 wedge holders 41 each have a bolt 43 attached to an annular body 42 at its outer surface 41c.
The circumscribed coils 51 are fixed in the mutually adjacent gaps 79.
a, a wedge 78 is housed in correspondence with the stator coil 51 consisting of the coil intermediate layer 51b and the clamped internal coil 51c, and the blade 68 is positioned so as to be able to move up and down on the wedge holder inner surface 41b; Therefore, the unevenness 8 of the wedge 41 and blade 68
3 is provided. That is, the center of the gap 79 of the wedge holder 41 and the center of the slot 46a to be inserted are aligned in the axial direction.

Next, a series of operations of this embodiment will be explained. The stator coil 51 and wedge 78 are inserted into the slot 46a.
In order to insert the stator coil 51 into the stator coil 51 as shown in FIG.
is set in the gap 79 of the wedge holder 41, and the wedge 78 is loaded into the groove of the wedge holder 41 to prepare for insertion. FIG. 2 shows a state in which the stator coil 51, wedge 78, and stator core 46 are set. When the above preparations are complete, first raise the plate 44 of the ring body 42 on which the wedge holder 41 is arranged using a hydraulic cylinder (not shown) until the wedge holder tip 41a touches the lower surface 46b of the stator core, and then stop. do. Next, the base 57 is actuated from above the stator core 46 by its own position controllable drive (not shown), and the base 57 is lowered and stopped until the clamp guide intermediate surface 52a reaches the stator core upper surface 46c. At this time, as shown in FIG. 3, the clamp guide positioning protrusion 52D positions the slot entrance 84 of the stator core 46 shown in FIG. 4, and the clamp guide outer surface 52c slides in along the wedge holder inner surface 41b. When the clamp guide 52 descends and stops, the blade 68 is raised together with the stripper 66 by applying a position controllable drive (not shown) to the plate 75, so that the blade tip 68a descends first and stops. The clamp guide 52b rises until it comes into contact with the clamp guide 52b, and then stops. When the above state is reached, the clamp cylinder 58 is operated, the ring cam 49 is lowered, and the coil clamper 48 is radially swung as shown in FIG.
to clamp. This state is shown in FIG. 6th
The figure is a perspective view schematically showing the retraction insertion by the coil clamper, and FIG. 7 is a side sectional view showing the retraction insertion by the coil clamper of FIG. 6. After clamping the stator coil 51, as shown in FIGS. 6 and 7, an upward drive is applied to the base 57 on the side of the clamp guide 52 in the opposite manner to the above, and the clamped internal coil 51c is pulled up. The circumscribed coil 51a shown in FIG. 5 is drawn toward the stator core lower surface 46b while approaching the wedge holder outer surface 41c, and the coil intermediate layer 51b is inserted into the slot 46a. Moreover, as shown in FIG. 7, since the retraction angle of the stator coil 51 when inserted is large, the stator coils are arranged in a vertical line on the retraction side. For this reason, the sixth
As shown in the perspective view of the figure, the stator coils 5 are arranged in alignment.
It is possible to insert the stator coil 51 into the slot 46a while retracting the stator coil 51 by clamping the stator coil 51 so as not to break it accurately. During retraction and insertion, the blade 68 applies a drive to the plate 75 in synchronization with the lifting operation of the base 57 on the clamp guide 52 side, and the blade 68 drives the plate 75 so that the clamp guide tip 52
The blade tip 68a is pulled in and inserted while the blade tip 68a is in contact with the blade tip 68a. This is because, when the coil intermediate layer 51b is inserted into the slot 46a, it serves to guide the stator coil 51 so as not to damage it at the slot entrance 84 portion. When the lowest line 51d of the inscribed coil 51c that is being pulled in reaches the position of the stator core upper surface 46c, the clamp guide 52 and blade 68 are stopped, and the inscribed coil 51 that was being clamped is stopped.
Unclamp c. After unclamping, the clamp guide 52 and the blade 68 are operated again, and the blade stops when the tip 68a of the blade is raised 3 to 5 mm from the core upper surface 46c. FIG. 8 is a side sectional view showing push-insertion by the stripper. The blade 68 comes to a complete stop, and as shown in FIG. 8, only the clamp guide 52 rises again, returns to its original position, and stops.

Since the stripper 66 has been raised along with the rise of the blade 68 during the pull-in insertion, it is in a state where it can be pushed in immediately after the pull-in insertion is completed. When the clamp guide 52 has finished rising, the push-insertion cylinder 77 is actuated to raise the stripper 66 and wedge pusher 81 by the push-insertion length l, thereby removing the inscribed coil 51c and the intermediate layer coil 51b. Projection 8 of the stripper 66 in FIG.
0, the insertion is performed by pushing into the slot 46a. Further, the wedge 78 is inserted into the slot 46a at the same time as the coil 51 by the projection 81a of the wedge pusher 81, and when the wedge pusher 81 comes to a position 1 to 3 mm from the core lower surface 46b, both the stator coil 51 and the wedge 78 are inserted. Complete. When the above insertion operation is completed, the blade 68 descends together with the stripper 66 and reaches the position shown in FIG. 2, completing one process.

In this manner, before fixing the stator core 46 and applying an insertion load to the coil 51, the coil 51 is clamped and pulled up to insert 80% of the entire coil into the core slot 46a, and finally the remaining 20% is removed by the stripper 66.
By pushing the coil 51 into the core slot 46a, it is possible to prevent the coil from shifting at the beginning of insertion, and the coils from the upper and lower surfaces of the core are arranged in an aligned manner.
Since there is no contact with the stripper 68 during insertion, the coil 51 inserted into the slot 46a is straight, and the insertion resistance of the wedge 78 is also small, resulting in a product with a higher footprint.

The above is the operation in which the plurality of coils 51 are inserted into the stator core slots 46a at the same time as the wedges 78. Next, wedge 78 and coil 5
The operation of inserting the required number of coils into the same core slot 46a in multiple steps without inserting all the core slots 1 at the same time, and preparing for the next coil insertion without the inserted coils protruding from the slot will be explained. The order of insertion is the same as the one described above where multiple coils were inserted into the wedge at the same time, but it differs from that after the push-in insertion shown in Figure 8 is completed, and the operation is performed by the stripper. When 66 is raised to the push insertion length l, the coil is inserted into the slot. If the stripper 66 and blade 68 are lowered from this state, the coil will protrude from the slot into which it has been inserted. Therefore, the stripper 66 pushes the clamp guide 52 used for the retraction insertion until the insertion length l.
After the stripper 66 is raised to the upper surface thereof, it is lowered again to the upper surface of the stripper 66. Next, the clamp guide 52 is also lowered in synchronization with the lowering of the stripper 66 and blade 68. FIG. 9 is a diagram showing a coil holding state when a wedgeless coil is inserted when the wedge and coil are not inserted at the same time. As shown in this figure, by doing so, the internal coil 51c is guided by the clamp guide outer surface 52c, and the coil 51 enters the slot by being pushed toward the outer circumference of the core.
is held by the clamp guide 52 without protruding from the core. Further, the clamp guide 52 is lowered to the same state as before insertion. However, the clamp guide intermediate surface 52a does not reach the stator core upper surface 46, but stops near the upper surface of the inserted coil. FIG. 10 is a detailed perspective view showing the relationship between the coil, stator core, and clamp guide in FIG. 9. As shown in FIG. 10, the coils arranged on the upper and lower surfaces of the stator core are held by the clamp guide outer surface 52c. Therefore, it has become possible to hold the coil inserted into the slot without protruding. With the above operation, even if the wedge and coil are not inserted at the same time, the coil can be inserted without protruding from the stator core slot, the number of coils inserted can be reduced by half compared to conventional methods, the insertion load is small, and in combination with retractable insertion, a higher quality product can be achieved. It becomes possible to generate.

More specifically, since the coil 51 is driven from below and the wedge 78 is driven from above, the adjustment range is wide, there is no restriction on the axial length, and the coil 51 is driven from the slot 46a.
Since the coil is pulled in rather than pushed in, the coil insertion pressure is low (less than 400 kg) and there is no need to provide angle alignment means or use a centering tool. Note that the present invention is not limited to the details of the above-described embodiments; for example, the cylinder 58 may be operated by pneumatics, hydraulics, or an electric motor. Also, the timing of coil insertion does not have to be in the order of the embodiments, for example,
The retraction insertion and the push insertion may operate at the same timing.

[0024]

[Effects of the Invention] As explained above, according to the present invention, since the stator coils arranged in a row are clamped, it is possible to insert the stator coils into the slots while pulling them in, and when further insertion. The retraction angle of the stator coil is also large, and the stator coils are lined up vertically on the retraction side, resulting in a thinner coil compared to conventional products, which contributes to the advancement of products such as smaller size, lighter weight, and higher output. can. In addition, since the push-in insertion is performed only slightly at the final part of insertion, damage to the coating of the stator coil is minimal, and manufacturing defects such as protrusion of the stator coil from the slot and damage to the stator coil and disconnection can be greatly reduced.

Furthermore, even if the wedge and the coil are not inserted at the same time, the coil can be held even after the coil is inserted so that it does not protrude from the slot of the stator core, so it is possible to insert the coil into the same core slot multiple times. Since it can be done separately, it is possible to reduce the coil insertion force, and by combining it with the above-mentioned pull-in insertion, it can contribute to high-quality products. It becomes an effect.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a coil insertion device according to an embodiment of the present invention.

FIG. 2 is a diagram showing details of each main part in FIG. 1;

FIG. 3 is a plan view showing the relationship between a coil clamper, a clamp guide, and an insertion coil.

FIG. 4 is a diagram showing the relationship between a stripper, a clamp guide, a stator core, and a stator coil.

FIG. 5 is a diagram showing the relationship between a wedge holder, a blade, and an inserted coil.

FIG. 6 is a perspective view schematically showing retraction and insertion by a coil clamper.

FIG. 7 is a side sectional view showing retraction and insertion by the coil clamper.

FIG. 8 is a side cross-sectional view showing push-insertion by a stripper.

FIG. 9 is a diagram showing a state in which the coil is held after the coil is inserted when the wedge is not inserted at the same time as the coil.

10 is a detailed perspective view showing the relationship between the coil and the stator core & clamp guide in FIG. 9. FIG.

FIG. 11 is a diagram showing a state of a conventional coil insertion device before a coil is inserted.

FIG. 12 is a diagram showing a state of a conventional coil insertion device after a coil is inserted.

FIG. 13 is a partial side view showing a coil insertion process using a conventional coil insertion device.

FIG. 14 is a partial plan view showing how a conventional stator coil is inserted.

[Explanation of symbols]

41...Wedge holder 42...ring body 46...Stator core 46a...Slot 48...Coil clamper 51...Stator coil 52...Clamp guide 66...Stripper 68...Blade 78...Wedge 79...Gap

Claims (5)

[Claims] Claim 1: A gap is provided to sandwich a pre-wound status coil to be inserted into a slot of a stator core, and the inner surface of the coil is located at the bottom of the stator core and coincides with the center of the gap and the center of the slot. In the coil insertion device, the coil insertion device includes a base body disposed in an annular shape so that the center is aligned in a straight line in the axial direction, and a stripper that pushes and inserts the sandwiched stator coil into a slot, the inner surface of the stator core and the inner surface of the base body being Drives up and down,
A plurality of clamp guides arranged in an annular shape with a gap maintained therebetween, and the pre-wound stator coil arranged radially inside facing each of the clamp guides are aligned with the inner surface of each of the clamp guides by scissors. a plurality of coil clampers that move up with the upward drive of each clamp guide and pull and insert into the slot at a predetermined inclination; A coil insertion device comprising a plurality of blades having the same shape and arrangement as the clamp guide to form a gap in which the stripper slides back and forth so as to push the stator coil into the slot. 2. The coil insertion device according to claim 1, wherein the coil clamper clamps a portion of the stator coil wound and held in the gap between the base bodies that is located inside the inner surface of the base body. 3. The coil insertion device according to claim 1, wherein the clamp guide is moved forward and backward in synchronization with the blade. 4. A gap is provided to sandwich a pre-wound stator coil to be inserted into the slot of the stator core, and the gap is located at the bottom of the stator core and its inner surface coincides with the center of the gap and the center of the slot. In a coil insertion device, the coil insertion device includes a base body disposed in an annular shape so that the center is aligned in a straight line in the axial direction, and a stripper that pushes and inserts the sandwiched stator coil into a slot, the inner surface of the stator core and the inner surface of the base body being Multiple clamp guides that are driven up and down and arranged in a ring with a gap maintained;
The pre-wound stator coil, which is disposed radially inside facing each clamp guide, is sandwiched in alignment with the inner surface of each clamp guide, and rises with the upward movement of each clamp guide into the slot. a plurality of coil clampers that pull in and insert the stator coil at a predetermined inclination into the slot, and the stripper that drives the inner surface of the base body up and down, and slides back and forth so that after alignment and insertion by the coil clampers, the stripper rises and pushes the stator coil into the slot. The stator coil is provided with a plurality of blades having the same shape and arrangement as the clamp guide in order to form a gap, and the stator coil is pulled and inserted by the clamp guide and the coil clamp, and then pushed and inserted by a stripper. , by lowering the clamp guide again in synchronization with the return of the stripper, a plurality of coils are successively inserted into the same slot of the stator core while preventing the inserted coils from jumping out of the slots. Insertion device. 5. Insertion of a plurality of coils into the same slot of the stator core is divided into a plurality of times, and each time the coils are inserted without a wedge, and in the final insertion of the plurality of times, the coils are inserted with a wedge. The coil insertion device according to claim 4, wherein the coil insertion device is inserted simultaneously at one time.