WO2015132895A1

WO2015132895A1 - Coil inserter

Info

Publication number: WO2015132895A1
Application number: PCT/JP2014/055575
Authority: WO
Inventors: 細野聖二
Original assignee: E-Tec株式会社
Priority date: 2014-03-05
Filing date: 2014-03-05
Publication date: 2015-09-11
Also published as: JP5586109B1; JPWO2015132895A1

Abstract

[Problem] To address the problem of providing a coil inserter capable of manufacturing, with a small number of process steps, a concentrated winding electric motor having a high coil space factor and no insulation failure and of providing a concentrated winding electric motor having a high coil space factor. [Solution] A coil bundle grappling means consists of a plurality of blade axis bodies circularly arranged contacting the inner diameter side of a stator core and an inter-phase insulating paper guide member. The inter-phase insulating paper guide member is disposed facing an outer diameter direction of blade gaps. One time projection of a stripper drives two coil bundles, which are grappled so as to be layered, into one slot of the stator core in sequence from a preceding layer along the blade gaps while being isolated from each other by the inter-phase insulating paper guide member. Following the projection of the stripper, an inter-phase insulating paper inserting means inserts an inter-phase insulating paper between the two coil bundles along the inter-phase insulating paper guide member.

Description

Coil insertion machine

The present invention relates to a coil insertion machine for inserting a wound coil bundle into a slot of a stator core. More specifically, the present invention relates to a coil insertion machine for a concentrated winding electric motor that inserts a coil bundle around each of a plurality of magnetic teeth arranged in an annular shape on the inner diameter direction side by an inserter system.

Conventionally, there are two methods of manufacturing a concentrated winding motor in which a coil wire is wound for each magnetic pole tooth protruding toward the inner diameter direction of the stator core. In the first manufacturing method, the coil wire feed needle is oscillated from the opening gap between adjacent magnetic pole teeth into the slot of the stator core, the coil wire is fed out from the tip, and the coil wire is directly wound around the magnetic pole teeth. A winding method is known. As a second manufacturing method, there is an inserter method in which a coil bundle wound in advance is inserted into a slot of a stator core through the opening gap and inserted by a coil insertion machine.

The direct winding method requires a moving space for moving the needle in the stator core slot, and the coil space factor of the coil wire is smaller than that of the inserter method. There was a problem that vibration and noise were likely to occur during operation. Moreover, since a coil is wound for each magnetic pole tooth of the stator core, there is a problem that it takes time for manufacturing and productivity is low. Therefore, in order to meet the needs of downsizing, high efficiency, low vibration, and low noise, the manufacturing method of the electric motor has been shifted to the inserter method that can improve the coil space factor.

On the other hand, according to the method of manufacturing an electric motor by the inserter method, the coil space factor can be improved as compared with the direct winding method. However, when two coil bundles are inserted into one slot, they are adjacent to each other in the slot. The matching coil bundles are easily entangled with each other, and it is difficult to insert the coil bundle itself. There is also a problem that it becomes difficult to insert interphase insulating paper for insulating the coil bundles.

Patent Document 1 discloses a direct winding process in which a nozzle is inserted through an opening of a winding groove on the side facing a rotor of a stator core and winding is performed directly between adjacent windings in the direct winding process. The technology which consists of the inserter winding process which inserts the coil previously wound down in said space from the said opening part is disclosed. According to the technique of Patent Document 1, it is said that the coil space factor can be increased as compared with a concentrated winding electric motor having only a direct winding process.

However, according to this technique, after the stator core is wound by the direct winding process, the coil is inserted by the inserter winding process to complete the winding of the stator core. Then, according to this technique, there is a problem that productivity cannot be improved because the number of steps increases because the number of steps for winding the coil increases.

In Patent Document 2, when a coil is inserted in a concentrated winding shape through a slot open after winding in an annular shape in advance, a step of simultaneously inserting a coil into teeth that are not adjacent to each other is performed twice or more. A technique for manufacturing an electric motor by repeating M times is disclosed. Specifically, the process of inserting the coil into the teeth of the stator is divided into two when the number of slots is an even number and three when the number of slots is an odd number. It is said that the coil space factor can be improved.

Further, in Patent Document 2, a dummy member is disposed in a half space in a slot, a coil bundle is inserted into an empty space in the slot, and an interphase insulating paper is disposed. The coil bundle of different phases is inserted into the remaining half space to improve the coil space factor and pressure resistance.

However, in the case of the technique disclosed in Patent Document 2, a dummy member is necessary, and the coil insertion process must be divided into a plurality of processes, and it takes time to insert the coil, and the structure of the coil insertion machine is complicated. There was a problem. Further, according to paragraph 0054 of Patent Document 2, a space factor of 50% to 65% is desirable, and a technique capable of further improving the coil space factor of the coil wire is required.

Patent Document 1: Japanese Patent Laid-Open No. 2002-142416 Patent Document 2: Japanese Patent Laid-Open No. 2002-291209

The problem to be solved by the present invention is to provide a coil insertion machine capable of producing a concentrated winding electric motor having a high coil space factor and having no insulation failure with few processes. Specifically, in a single coil insertion process, a coil bundle is inserted around each of the magnetic teeth of the stator core so as to obtain a high coil space factor, and the coil bundle in the slot can be reliably insulated between phases. Is to provide a simple coil insertion machine.

The coil insertion machine of the concentrated winding electric motor according to the first aspect of the present invention is a concentrated type in which a coil bundle is inserted around each magnetic pole tooth of a stator core in which slots having an opening gap of a desired width on the inner diameter side are annularly arranged. In a coil insertion machine of a winding motor, a plurality of blade shaft bodies arranged in an annular shape in contact with the inner diameter side of the stator core so as to hook adjacent coil bundles, and the coil inserted adjacent to one slot An interphase insulating paper guide member for guiding interphase insulating paper for insulating the bundle to the stator core; interphase insulating paper inserting means for inserting the interphase insulating paper between adjacent coil bundles; and the coil bundle from the opening gap to the slot. A coil bundle pushing means having a stripper having an external tooth for pushing the blade, and a blade formed by the adjacent blade shaft body The front end is communicated with the opening gap, the interphase insulating paper guide member is disposed facing the outer diameter direction of each blade gap, and adjacent coil bundles form a layer in the blade gap. At the same time, the outer side of the layered coil bundle is sectioned and hooked on both sides of the interphase insulating paper guide member, and the outer side of the adjacent coil bundle becomes the interphase insulating paper by one extension of the stripper. While being divided into guide members, along the blade gap, the coil bundle of a multi-phase is pushed into the slot sequentially from the coil bundle of the previous layer through the opening gap, and the interphase Insulating paper insertion means inserts the interphase insulating paper along the interphase insulating paper guide member.

The interphase insulating paper guide member is disposed facing the outside of the blade gap. When the cross-sectional shape of the interphase insulating paper guide member is a cross-sectional shape that narrows toward the blade gap, the coil bundle extending from the blade gap to the outside of the blade shaft body extends smoothly so as not to bend, and Although it is preferable that it is hard to be damaged, it is not limited to this. The two coil bundles inserted into one slot are hooked so as to form a layer in the blade gap extending in the extending direction of the stripper, and the coil bundle outside the blade gap is on both sides of the interphase insulating paper guide member. Segmented and hooked.

Here, the procedure for hooking a multi-phase coil bundle will be described. First, one coil bundle is inserted from the opening part ahead of the blade gap on both sides of the blade shaft body arranged at a position facing the magnetic pole teeth around which the coil bundle is wound. Then, the coil bundle part extending outward from the blade gap is hooked so as to be inside the adjacent interphase insulating paper guide member. Further, the coil bundle is hooked in order in the same manner in the blade gaps on both sides of the next adjacent blade shaft body, and the coil bundle on the proximal end side is hooked. Then, the coil bundle on the front side is similarly hooked on the blade shaft body adjacent to the blade shaft body on which the coil bundle is hooked so that the coil bundles are vertically layered.

Two coil bundles inserted into one slot are overlapped and hooked so as to form a layer in one narrow blade gap, so that the two coil bundles are layered along the interphase insulating paper guide member. As it is, it is pushed up and inserted into one slot so as not to get entangled. Since the two coil bundles are hooked so as to form a layer, the coils can be sequentially inserted by one coil bundle pushing operation. Thereby, an electric motor with a small coil space factor and a small vibration can be manufactured with high manufacturing efficiency.

The coil bundle pushing means is composed of a stripper having external teeth that slide along the blade gap and a stretching means including a driving means for stretching the stripper. Also, for each phase of the coil bundle that is hooked to form a layer on the blade shaft body, the shape of the stripper tip is formed so as to form a layer with a phase shift so that the coil bundle extrusion part at the tip of the stripper contacts. Is preferred. Even if the coil extrusion part of a stripper is integrally formed so that it may become a phase which shifted stepwise, the auxiliary stripper may be attached to the extrusion part so that a phase may be shifted.

The interphase insulating paper inserting means synchronizes the interphase insulating paper that insulates adjacent coil bundles inserted into one slot along the interphase insulating paper guide member in synchronization with the lower coil bundle inserted by extending the stripper. What is necessary is just to insert following. The interphase insulating paper guide member divides the coil bundle outside the blade shaft, and the interphase insulating paper inserting means follows the coil bundle and inserts the interphase insulating paper between the coil bundles. This reduces the insertion resistance of the interphase insulating paper to be inserted between adjacent coil bundles in one slot, making it possible to insert the interphase insulating paper so as not to buckle. Less likely to occur.

According to the coil insertion machine of the first invention of the present invention, the strip of the stripper is stretched once, and the coil bundle on the front side is formed along all the slots along the blade shaft body and the interphase insulating paper guide member. The coil bundle wound around the adjacent magnetic teeth is inserted so that the coil bundle on the end side is pushed out, and the interphase insulating paper is reliably inserted following the coil bundle. Accordingly, there is an advantageous effect that a concentrated winding motor having a coil space factor of 90% or more can be manufactured with a simple configuration coil insertion machine in a short working time without using a complicated process.

According to a second aspect of the present invention, in the coil insertion machine according to the first aspect, each of the interphase insulating paper guide members forms a shaft, and guides the interphase insulating paper along the axial direction in the shaft. The guide space is provided with a guide gap that opens to face the blade gap, and the shaft body is an inclined portion having a tip portion that faces the stator core and is lowered on both sides. The cross-sectional shape of the shaft body is inclined so that the side toward the blade gap is narrowed.

In the case where the interphase insulating paper guide member is a single shaft, the interphase insulating paper guide member has an inclined portion with the tip portion facing the stator core going down on both sides, and the cross-sectional shape of the interphase insulating paper guide member Is preferably a cross-sectional shape inclined so that the side toward the blade gap narrows. The interphase insulating paper guide member may be a single shaft body or a plurality of shaft bodies extending in parallel.

This makes it possible to reduce the interference between the coil bundle, which has been bent and the extra length at the end of the coil bundle, which is difficult to deform, and the interphase insulating paper guide member, and the coil bundle and interphase insulating paper can be easily inserted. In addition, it is easy to sort and hook the coil bundle hooked in the blade gap on the left and right sides of the interphase insulating paper guide member. .

According to a third aspect of the present invention, in the coil insertion machine according to the first aspect, the interphase insulating paper insertion means includes an interphase insulating paper pusher shaft, and the guide space has a direction along the shaft. Includes a sliding space for interphase insulating paper pusher, and the guide gap is a narrow gap for sliding and extending the interphase insulating paper, and the interphase insulating paper pusher shaft includes the interphase insulating paper pusher slide The interphase insulating paper is inserted while being guided along a moving space.

The guide gap may be a gap having a width that is slid with the interphase insulating paper interposed therebetween, and is formed at a position corresponding to the approximate center dividing the slot into two. The interphase insulating paper pusher sliding space is a space extending along the guide gap in the guide space, and the interphase insulating paper pusher shaft pushes the lower end portion of the interphase insulating paper sandwiched between the guide gaps along the guide gap. It should be done. By providing the interphase insulating paper guide member with the guide gap, the interphase insulating paper is pushed up by the interphase insulating paper pusher shaft body and inserted into the slot in a state where the interphase insulating paper is sandwiched between the guide gaps.

According to the third aspect of the invention, the interphase insulating paper is not tilted to cause buckling or insertion clogging, and is inserted from the lower end to the upper end of the slot, so that poor insulation is less likely to occur. Further, since the interphase insulating paper is inserted in the approximate center of the slot, the coil bundle is evenly divided into desired positions in the slot, and a stable armature with less vibration is obtained.

According to a fourth aspect of the present invention, in the coil insertion machine according to the first to third aspects of the present invention, the interphase insulating paper includes a resin flat plate having a desired width of electrical insulation, a central portion in the width direction, and the central portion. It is characterized in that it is bent at both sides equally spaced from the part and formed into a substantially T-shape. Accordingly, even if the interphase insulating paper is formed by one sheet, the rigidity is increased and the buckling is difficult to be buckled. Therefore, the interphase insulating paper is easily processed, and the insertion failure is less likely to occur.

According to a fifth aspect of the present invention, in the coil insertion machine according to the first to fourth aspects of the present invention, each of the external teeth includes a protruding piece formed so as to protrude from the external tooth toward the outer radial direction. The protruding pieces are characterized in that the adjacent coil bundles inserted in the slots are divided and guided between the adjacent coil bundles in advance of the interphase insulating paper.

The shape of the protruding piece passing between the coil bundles may be a flat plate shape or a rod shape, and the shape is not limited. Further, if the tip of the protruding piece is formed to extend to the vicinity of the bottom of the slot, it is preferable that the coil wire after insertion does not extend from the center position to the opposite side of the slot. Also, if the width of the protruding piece is slightly wider than the width of the interphase insulating paper inserted between the coil bundles, the interphase insulating paper is inserted so as not to buckle with a small resistance while maintaining a high coil space factor. Is possible. According to the fifth aspect of the present invention, the interphase insulating paper is not twisted and inserted into the center position of the slot, so that a high-performance electric motor with no insulation failure and a high coil space factor can be manufactured.

The sixth invention of the present invention is the coil insertion machine of the first to fifth inventions, wherein the coil bundle pushing means includes stretching means for stretching the stripper, and pulling means for pulling the stripper forward. The stretching means is separable from the stripper, the stripper is pushed up by the stretching means, and after the coil bundle and the interphase insulating paper are inserted into the slot, the stretching means and the stripper are separated, The stripper is locked to the pull-out means, and the stripper is pulled out beyond the stator core.

The stretching means includes a shaft body that is locked by a stripper and extends slidably within the blade shaft body, and a shaft body stretching device. Further, the stretching means and the stripper need only be engaged with the lower end of the stripper so as to be separable from the shaft body, and the pulling means may be pulled out after the stripper exceeds the stator core. When the coil bundle pushing means is provided with a tripper pulling and pulling means forward, it is not necessary to return the stripper along the forward path after the coil bundle is inserted after the coil bundle is inserted into the stator core.

According to the sixth invention, even if the protruding piece of the fifth invention passes through the slot in one direction and the interphase insulating paper is subsequently inserted, the inserted interphase insulating paper is No buckling or damage due to return. The pulled stripper may be locked to the shaft after removing the stator core into which the coil is inserted.

According to a seventh aspect of the present invention, in the coil insertion machine according to the first to sixth aspects, an auxiliary stripper that pushes up the coil bundle of a previous layer inserted into the slot in advance at the tip of the stripper. And a coil push-up portion formed radially at the tip of the auxiliary stripper, wherein the coil push-up portion pushes up in contact with the coil bundle of the previous layer.

The shape of the coil push-up portion of the auxiliary stripper is not particularly limited as long as it pushes up the coil bundle of the front layer among the plurality of coil bundles hooked on the blade shaft body. Further, when the number of slots is an even number, the coil bundle is hooked on two layers, so that one auxiliary stripper only needs to push up the coil bundle on the far side layer. When the number of slots is an odd number and a multiple of 3, it is preferable that a two-layer auxiliary stripper is attached to the stripper and the coil bundle is pushed up into three layers. That is, if the first auxiliary stripper pushes up the coil bundle of the first layer, the second auxiliary stripper pushes up the second layer coil bundle, and then the stripper pushes up the third layer coil bundle. Good.

According to the seventh invention, the coil bundle pushing means includes the auxiliary stripper, so that the coil bundle of the front layer is pushed up by the auxiliary stripper and inserted into the slot, and the coil bundle of the base layer is attached to the stripper. It is pushed up and inserted into the slot. As a result, compared to the case without an auxiliary stripper, the pushing force applied to each coil bundle becomes uniform, the coil bundle is prevented from being crushed, the resistance when inserting the coil bundle is reduced, and the interphase insulating paper is inserted. Will also be easier.

-According to the first invention of the present invention, by extending the stripper once, along the blade shaft body and the interphase insulating paper guide member, the coil bundle on the front side is placed on the proximal end side in all slots. The coil bundle wound around the adjacent magnetic pole teeth is inserted so that the coil bundle is pushed out, and the interphase insulating paper is reliably inserted following the coil bundle. Accordingly, there is an advantageous effect that a concentrated winding electric motor having a high coil space factor of 90% or more can be manufactured by a coil insertion machine with a simple configuration in a short working time without using a complicated process.
-According to the second invention of the present invention, interference between the coil bundle that has been bent and the extra length of the end portion of the coil bundle has become difficult to deform and the interphase insulating paper guide member is reduced, and the coil bundle and interphase It is easy to insert insulating paper. In addition, it is easy to sort and hook the coil bundle hooked in the blade gap on the left and right sides of the interphase insulating paper guide member. .

-According to the third aspect of the present invention, the interphase insulating paper is not tilted to cause buckling and insertion clogging, and is inserted from the lower end to the upper end of the slot, so that poor insulation hardly occurs. Further, since the interphase insulating paper is inserted in the approximate center of the slot, the coil bundle is evenly divided into desired positions in the slot, and a stable armature with less vibration is obtained.
-According to the fourth aspect of the present invention, even if the interphase insulating paper is formed by one sheet, the rigidity becomes high and the buckling is difficult to be made. Therefore, the interphase insulating paper can be easily inserted, and poor insertion is not likely to occur. .
-According to the fifth aspect of the present invention, the interphase insulating paper is not twisted and inserted into the center position of the slot, so that a high-performance motor having no insulation failure and a high coil space factor can be manufactured.

-According to the sixth invention of the present invention, even when the protruding piece of the fifth invention passes through the slot in one direction and the interphase insulating paper is subsequently inserted, the inserted interphase insulating paper , Buckling and damage are not caused by the return of the protruding piece.
-According to the seventh invention of the present invention, compared to the case where no auxiliary stripper is provided, the pushing force applied to each coil bundle becomes uniform, the coil bundle is prevented from being crushed, and the resistance when inserting the coil bundle is reduced. And the interphase insulating paper can be inserted more easily.

Explanatory drawing by the perspective view of a coil insertion machine (Example 1). Explanatory drawing by the cross section of a coil insertion machine (Example 1). Explanatory drawing by the perspective view of a stripper (Example 1). Explanatory drawing explaining insertion of phase insulation paper (Example 1). Explanatory drawing by sectional drawing of a phase insulation paper guide member (Example 1). Explanatory drawing of the coil insertion operation | movement of a coil insertion machine (Example 1).

Explanatory drawing of the stripper by which the protrusion piece was provided in the external tooth (Example 2). Explanatory drawing of the coil insertion operation | movement of a coil insertion machine (Example 2). Explanatory drawing of the stripper provided with the auxiliary stripper (Example 3). Explanatory drawing of the coil insertion operation | movement of a coil insertion machine (Example 3). Explanatory drawing of the stripper provided with the some auxiliary stripper (Example 4). Explanatory drawing of the coil insertion operation | movement of a coil insertion machine (Example 4).

Hereinafter, an embodiment of a coil insertion device that hooks a multi-phase coil bundle so as to form a layer in the blade gap and inserts all the coil bundles into a desired slot by one stretching operation of the stripper, Embodiments 1 to 4 will be described with reference to the drawings.

In Example 1, an example of a coil insertion machine in which an interphase insulating paper guide member separates a coil bundle extending outward from a blade gap will be described with reference to FIGS. FIG. 1 is a perspective view of the coil insertion machine, and FIG. 2 is a cross-sectional view of the coil insertion machine. FIG. 3 is an explanatory view of the stripper according to a perspective view. FIG. 4 is an explanatory diagram for explaining insertion of interphase insulating paper. FIG. 5A is an explanatory view of a state in which the interphase insulating paper is sandwiched between the interphase insulating paper guide members, and FIG. 5B is an interphase insulating paper pusher sliding space and an interphase insulating paper pusher. It is explanatory drawing by the cross section of a shaft. FIG. 6 is an explanatory diagram of the coil insertion operation of the coil insertion machine.

First, the overall configuration of the coil insertion machine 1 applied to the stator core 30 having nine slots will be described with reference to FIGS. In FIG. 1, for the sake of easy understanding, only the coil bundle 41 that is hooked on two adjacent blades at one place is indicated by the phantom line of the dashed-dotted line inside the blade shaft body. For the coil bundle, the hooked portion is not shown. Further, the upper portion of one interphase insulating paper 70 is indicated by a broken line, and the other interphase insulating paper is omitted.

The coil insertion machine 1 includes a blade shaft body 10 and an interphase insulating paper guide member 20, and the blade shaft body 10 and the interphase insulating paper guide member 20 are arranged in a ring shape and are integrally fixed. The blade shaft body 10 includes a blade shaft body main body 11 and a guide member 12 that guides the flange portion of the interphase insulating paper, and the guide shaft 12 is attached to the lower part of the outer surface of the blade shaft body main body 11. The blade shaft body 10 has nine blade shaft body bodies 10 arranged in an annular shape at intervals so that a blade gap 13 facing the opening gap 31 of the stator core 30 is formed. The stator core 30 is supported at the tip of the blade shaft body 10 so that the blade gap 13 formed by the adjacent blade shaft body communicates with the opening gap 31 of the stator core.

The blade shaft body 10 is a shaft body having a substantially semicircular cross-sectional shape curved on the inner side (see FIG. 2). The width of the blade gap 13 between the adjacent blade shafts is such that a coil bundle 40 can be inserted in advance, and about 2 to 3 coil wires depending on the opening gap 31 of the stator core. About 2 mm. Further, the space on the inner side of the blade shaft body is a stripper moving space in which the stripper 50 (see FIG. 3) serving as the coil pushing means is moved.

The interphase insulating paper guide member 20 is disposed at a position facing the blade gap 13 formed by the adjacent blade shaft bodies. The blade shaft body 10 and the interphase insulating paper guide member 20 serve as a coil bundle hooking means. The interphase insulating paper guide member 20 is provided with an inclined portion 21 that is lowered to both sides at a tip portion toward the stator core 30. The cross-sectional shape of the interphase insulating paper guide member 20 is a cross-sectional shape that is inclined so that the side 22 toward the blade gap is narrowed. The interphase insulating paper guide member 20 is provided with a guide gap 23 for guiding the interphase insulating paper along the axial direction on the side facing the blade gap 13. The interphase insulating paper pusher shaft 60 that moves along the guide gap and the driving means for the interphase insulating paper pusher shaft 60 (not shown) serve as interphase insulating paper insertion means.

The interphase insulating paper guide member 20 is formed below the central portion of the slot 32 and extends to the vicinity of the lower end of the slot when the stator core 30 is supported by the blade shaft body 10. The width of the guide gap 23 in the shaft body of the interphase insulating paper guide member 20 is set such that the folded portion 71 of the interphase insulating paper 70 is sandwiched and held. The guide gap 23 is provided with an interphase insulating paper pusher sliding space 61 in which the interphase insulating paper pusher shaft 60 is moved (see FIG. 5B).

In the interphase insulating paper 70, a single long and thin resin flat plate having electrical insulating properties is bent at the center portion to form a folded portion 71. Further, both side portions are bent at positions equally spaced from the central portion to form a flange portion 72 that seals the opening gap of the stator core, and is formed in a substantially T-shaped cross-sectional shape as a whole. The interphase insulating paper 70 is cut into a desired length by a resin flat plate cut by an unillustrated interphase insulating paper making machine and folded into the shape described above, and then the folded portion 71 is a guide gap 23 of the interphase insulating paper guide member 20. It is inserted so that it may be pinched.

The interphase insulating paper 70 inserted into the guide gap 23 closes the slot opening gap 31 following the insertion of the coil bundle 40 by the stripper 50 with the flange 72 in contact with the guide member 12 of the blade shaft. It inserts so that between the two

coil bundles

40 and 40 may be insulated. Since the interphase insulating paper 70 is sandwiched between the guide gaps 23 and inserted into contact with the guide member 12 that forms the blade shaft, the interphase insulating paper 70 is prevented from being inserted or buckled.

Next, a configuration in which a plurality of coil bundles 42 and 43 are hooked on the blade shaft body 10 of the coil insertion machine 1 will be described with reference to FIG. FIG. 2 is a cross-sectional view of the coil insertion machine, and FIG. 3 is a cross-sectional view of the stripper. FIG. 2 shows a cross-sectional view at the BB position in FIG. 6C on the left side of the central one-dot chain line, and on the right side of the central one-dot chain line, AA in FIG. 6C. A sectional view of the position is shown.

The stator core 30 is supported by the blade shaft 10 so that the number of slots is nine and the opening gap 31 faces the blade gap 13. The stripper 50 has a substantially gear shape and is formed so as to contact the inner surface of the blade shaft body so as to extend in the axial direction of the blade shaft body. The tip of the external tooth 51 of the stripper is formed so as to slightly protrude from the blade gap formed by the blade shaft body.

In the coil bundle 40, five bundles are the coil bundle 42 on the blade shaft body front side indicated by a one-dot chain line, and four bundles are the coil bundle 43 on the blade shaft base end side indicated by the solid line. Since the number of slots in the stator core of the first embodiment is an odd number, the blade gap 14 at one lower side in FIG. 2 is a gap through which only the coil bundle 42 on the blade shaft front side is passed. In the blade gap 14, one of the coil bundles is stacked on the blade shaft 10 so as to form a layer above the other coil bundle. In the other blade gap, the coil bundle 42 on the blade shaft front side is overlapped with the coil bundle 43 on the blade shaft base end side and is hooked on the blade shaft 10 (FIG. 6B). (See the figure).

More specifically, in the coil bundle, the coil bundle 43 on the blade shaft base end side is first hooked in the blade gap, and then the coil bundle 42 on the blade shaft front side is hooked in the same blade gap. The two

coil bundles

42 and 43 hooked in the gap between the two blades are divided on both sides of the interphase insulating paper guide member 20 at a position outside the blade shaft body. In the blade gap 13, the coil bundle 42 on the blade shaft front side is overlapped and hooked on the front side of the coil bundle 43 on the blade shaft base end side.

The guide gap 23 provided in the interphase insulating paper guide member is formed so that the depth extends to a position corresponding to the outer peripheral side of the slot 32. The interphase insulating paper 70 is formed so that the length of the folded portion 71 is aligned with the depth of the inside and outside of the slot, so that the coil bundles 42 and 43 are surely insulated. The flange portion 72 of the interphase insulating paper has a width wider than the width of the opening gap 31 of the slot so that the coil bundle inserted into the slot is insulated.

When the coil is inserted, the coil bundle 43 on the proximal side of the blade shaft body is pushed up in contact with the stripper 50, and the coil bundle 42 on the distal side of the blade shaft body is overlaid on the coil bundle 43 on the proximal side of the blade shaft body. Then, it is pushed up along the interphase insulating paper guide member 20 while maintaining the separated state. Finally, the bent portion 44 of the end portion of the coil bundle is a terminal portion protruding from the stator core along the inclined portion 21 of the interphase insulating paper guide member, and the coil bundle 42 on the blade shaft front side is the blade shaft. It is inserted into the slot 32 in advance of the coil bundle 43 on the body base end side. Further, the coil bundle 43 on the blade shaft body proximal end side is inserted into the slot following the coil bundle 42 on the blade shaft body front side.

Next, the insertion of the interphase insulating paper 70 will be described with reference to FIGS. FIG. 4 is an explanatory diagram for explaining insertion of interphase insulating paper. FIG. 5A is an explanatory diagram for explaining the interphase insulating paper 70 sandwiched between the interphase insulating paper guide members 20 by a cross section. FIG. 5B is an explanatory diagram for explaining the interphase insulating paper pusher shaft 60 in section. Further, in FIG. 4, for easy understanding, the interphase insulating paper 70 and the interphase insulating paper pusher shaft body 60 are shown only in one place, and the coil bundle and the interphase insulating paper guide member are omitted.

The stator core 30 has a substantially cylindrical shape, and nine substantially T-shaped magnetic pole teeth 33 are annularly arranged inward. A gap formed by the wide portion of the magnetic pole teeth is defined as an opening gap 31, and a space defined by adjacent magnetic pole teeth is defined as a slot 32. In addition, a slot insulating paper 34 that insulates the stator core 30 and the coil bundle inserted into the slot in advance is provided on the inner peripheral surface of each slot. The slot insulating paper 34 is formed leaving an opening gap 31 so that a coil bundle can be inserted.

The interphase insulating paper 70 follows the insertion of the coil bundle by the extension of the stripper 50, and the end portion is pushed up by the interphase insulating paper pusher 60 along the guide gap 23 of the interphase insulating paper guide member 20. It is pushed up by the interphase insulating paper pusher 60 while being sandwiched between the gaps between adjacent coil bundles 42 and 43.

Further, the length of the interphase insulating paper 70 is slightly longer than the height of the slot 30, and the insulation between the coil bundles 42 and 43 is more ensured. Further, the shape of the front end portion 62 of the interphase insulating paper pusher shaft is not limited, but it is preferable that the end portion 62 of the interphase insulating paper folded portion 71 is sandwiched and supported so as to be substantially U-shaped. .

Next, the interphase insulating paper 70 sandwiched between the interphase insulating paper guide members 20 will be described with reference to FIG. In the interphase insulating paper guide member, a folded portion 71 of interphase insulating paper is sandwiched and held so as not to spread left and right. The end 73 of the folded portion of the interphase insulating paper is inserted so as to reach the bottom of the guide gap 23. Further, the flange portion 72 of the folded portion is in a state of protruding out of the guide gap 23.

Here, the interphase insulating paper pusher shaft 60 will be described with reference to FIG. The interphase insulating paper pusher sliding space 61 is provided in the middle from the opening 24 of the guide gap to the depth 25, is a space wider than the width of the guide gap, and extends along the interphase insulating paper guide member. . The interphase insulating paper pusher shaft 60 is slidable along the interphase insulating paper pusher sliding space 61.

Next, the insertion process of the coil bundle 40 will be described with reference to FIG. FIG. 6A is a diagram showing a cutting position representing a cross-sectional view of the coil insertion machine 1. In FIG. 6A, the coil bundle is omitted and the stator core 30 is indicated by a broken line in order to facilitate understanding. 6B to 6G are explanatory views of the cutting position of the ABC line shown in FIG. 6A in the coil bundle insertion process. In FIG. 6B, the position where the stator core 30 is supported by the blade shaft body is indicated by a broken line. Further, in FIGS. 6B to 6G, the stator core support portion 35 is indicated by a one-dot chain line. Further, in FIGS. 6E to 6G, coil bundles are overlapped for easy understanding. The same applies to other embodiments described later.

First, the two

coil bundles

42 and 43 are hooked so as to overlap each other at a desired blade gap position. Next, the stator core support portion 35 that supports the stator core is lowered, and the stator core 30 is supported on the front side of the blade shaft body 20 (FIG. 6B). Here, the coil bundles are classified into a coil bundle 42 on the blade shaft front side and a coil bundle 43 on the blade shaft base end side. The interphase insulating paper 70 is inserted into the predetermined position of the interphase insulating paper guide member by the interphase insulating paper pusher shaft 60 from below the coil insertion machine 1.

Next, the stripper 50 is extended, the coil bundle 43 on the blade shaft base end side is pushed up, and the coil bundle 42 on the blade shaft front side located on the upper side is pushed up (see FIG. 6C). ). Further, the interphase insulating paper pusher shaft 60 is stretched following the stripper 50, and the interphase insulating paper 70 is pushed up. Further, when the stripper 50 is further extended, the lower portion of the coil bundle 42 on the blade shaft front side starts to be inserted into the slot from the lower end side of the opening gap (FIG. 6D). Further, the stripper 50 is pushed up, and the coil bundles 42 and 43 are completely pushed into the slots (FIG. 6E). Then, following the insertion of the coil bundle, the interphase insulating paper 70 is inserted between the coil bundles (FIG. 6F). Finally, the stripper 50 and the interphase insulating paper pusher shaft 60 are lowered, and the stator core 30 is supported by the stator core support portion 35 and removed from the coil insertion machine 1 (FIG. 6 (G)). The process is complete.

In Example 2, a coil insertion machine in which a protruding piece 52 is provided on an outer tooth 51 of a stripper will be described with reference to FIGS. FIG. 7 (A) is an explanatory view based on a plan view of a stripper provided with protruding pieces on external teeth, and FIG. 7 (B) is an explanatory view based on a perspective view thereof. FIG. 8A is a diagram showing a cutting position representing a cross-sectional view of the coil insertion machine. FIGS. 8B to 8G are explanatory views for explaining the coil bundle insertion process at the cutting position of the ABC line shown in FIG. 8A.

First, the configuration of the stripper provided with the protruding piece 52 will be described with reference to FIG. 7 (A) and FIG. 7 (B). The protruding piece 52 is formed to extend outward from the outer teeth 51 of the stripper, and has a flat plate shape as a whole. The width of the protruding piece is slightly larger than the width of the folded interphase insulating paper, and is a width that matches the guide gap 23 (see FIG. 5B). The protruding length of the protruding piece is substantially the same as the length of the slot 32 in the depth direction. Further, the upper edge of the protruding piece 52 is formed to be gently inclined downward toward the outside. The protruding piece 52 is disposed below the upper edge of the stripper outer teeth, and is extended between the two coil bundles in the slot with a slight delay after the insertion of the coil bundle on the blade shaft base end side. Thus, the coil bundle on the blade shaft base end side is not damaged.

Next, the coil bundle insertion process will be described with reference to FIGS. 8B to 8G. In the coil insertion machine of the second embodiment, the stripper extending means 53 and the stripper 50 can be separated. The top surface of the stripper is connected to a drawing means 54 that pulls out the separated stripper. Of course, the stripper 50 and the extraction means 54 may be separable. First, in a state where the stripper 50 is not stretched, the coil bundles 42 and 43 are hooked, and the stator core 30 is supported at the tip of the blade shaft body (FIG. 8B). Next, the stripper 50 is extended to push up the coil bundles 42 and 43 (FIG. 8C). Here, the protruding piece 52 passes through the guide gap of the interphase insulating paper guide member in advance of the interphase insulating paper 70. Then, the coil bundles 42 and 43 begin to be inserted into the slots (FIG. 8D).

Further, the stripper 50 is pushed up, the coil bundles 42 and 43 are completely pushed into the slots in contact with the external teeth 51 of the slot (see FIG. 7B), and the protruding piece 52 is interposed between the coil bundles 42 and 43. The coil bundles 42 and 43 are orderly divided on both sides of the slot (FIG. 8E). And then. The stripper is pulled out by the pulling means 54, and the interphase insulating paper 70 is inserted (FIG. 8F). Finally, the extending means 53 of the stripper and the interphase insulating paper pusher 60 are lowered, the stator core 30 is removed from the coil insertion machine (FIG. 8G), and a series of coil insertion steps is completed.

In Example 3, a coil insertion machine provided with a one-stage auxiliary stripper 80 will be described with reference to FIGS. 9 and 10. FIG. 9A is a plan view of a stripper provided with an auxiliary stripper. FIG. 9B is an explanatory diagram based on the perspective view. FIG. 10A is a diagram showing a cutting position representing a cross-sectional view of the coil insertion machine. FIGS. 10B to 10G are explanatory views for explaining the coil bundle insertion process at the cutting position of the ABC line shown in FIG. 10A.

First, in the third embodiment, a stripper used for a stator core having six slots and an even number of slots will be described with reference to FIGS. 9A and 9B. . The stripper 81 is provided with six external teeth 82 so as to correspond to the number of slots. The auxiliary stripper 80 is overlapped and fixed to the top of the stripper 81 by fixing means (not shown). In the auxiliary stripper 80, three coil push-up portions 83 are radially formed so as to be in contact with only the curved portion of the coil bundle on the front side. A recess 84 is formed between the coil push-up portions 83 arranged at equal intervals so as not to contact the curved portion of the coil bundle on the proximal end side. The height of the auxiliary stripper 80 is substantially the same as the height of the coil bundle in the hooked state.

Next, with reference to FIG. 10 (B) to FIG. 10 (G), the coil bundle insertion process of Example 3 will be briefly described. First, the two

coil bundles

42 and 43 are hooked on the blade shaft body, and the stator core 36 is supported by the stator core support portion 35 (FIG. 10B). Next, the stripper 82 is extended, and the coil bundle 42 on the front side is pushed up by the coil push-up portion 83 of the auxiliary stripper 80. The coil bundle 43 on the base end side is in a state of being accommodated in a hollow portion between the coil push-up portions, and is pushed up in contact with the stripper 82 behind the coil bundle 42 on the front side (FIG. 10C). . The leading coil bundle 42 begins to be inserted into the slot prior to the proximal end coil bundle 43 (FIG. 10D). Further, following the coil bundle 42 on the front side, the coil bundle 43 on the base end side is also completely pushed into the slot (FIG. 10E). Then, the interphase insulating paper 70 is inserted (FIG. 10F). Finally, the stripper 81 and the interphase insulating paper pusher shaft 60 are lowered, the stator core 36 is removed from the coil insertion machine (FIG. 10G), and a series of coil insertion steps is completed.

In Example 4, a coil insertion machine provided with two-stage

auxiliary strippers

85 and 86 will be described with reference to FIGS. 11 and 12. FIG. 11A is a plan view of a stripper provided with a two-stage auxiliary stripper. FIG. 11B is an explanatory diagram based on the perspective view. FIG. 12A is a diagram showing a cutting position representing a cross-sectional view of the coil insertion machine. 12 (B) to 12 (G) are explanatory views for explaining the coil bundle insertion process at the cutting position of the ABC line shown in FIG. 12 (A).

First, the configuration of the stripper 89 provided with the two-stage

auxiliary strippers

85 and 86 will be described with reference to FIGS. 11 (A) and 11 (B). Here, an example of a stripper used for a stator core having nine slots will be described. The stripper 89 is provided with nine external teeth so as to correspond to the number of slots. In each of the

auxiliary strippers

85 and 86, three coil push-up portions 87 are formed radially, and a hollow portion 88 is formed between each coil push-up portion. The

auxiliary strippers

85 and 86 are stacked above the stripper 89 with a phase shift, and are fixed by fixing means (not shown) so that the three coil bundles are sorted into three layers and pushed up. The heights of the

auxiliary strippers

85 and 86 are substantially the same as the height of the coil bundle caught in the blade gap.

Next, with reference to FIGS. 12B to 12G, the coil bundle insertion process will be described. First, each of the three coil bundles is divided into three groups of coil bundles 45, 46, 47, and is hooked on the blade shaft body so as to form a layer, and the stator core 30 is supported at the tip of the blade shaft body ( FIG. 12B). Next, the stripper 89 is stretched, the first group of coil bundles 45 is pushed up by the first layer auxiliary stripper 85, the second group of coil bundles 46 is pushed up by the second layer auxiliary stripper 86, and the stripper 89 The third group of coil bundles 47 is pushed up. (FIG. 12C). Then, the first group of coil bundles 45 starts to be inserted into the slots prior to the second and third group of coil bundles (FIG. 12D). Next, following the first group of coil bundles 45, the second group of coil bundles 46 and the third group of coil bundles 47 are sequentially pushed into the slots (FIG. 12E). Then, interphase insulating paper 70 is inserted between adjacent coil bundles (FIG. 12F). Finally, the stripper 89 and the interphase insulating paper pusher shaft 60 are lowered, and the stator core 30 is removed from the coil insertion machine (FIG. 12G), and a series of coil insertion steps is completed.

(Other)
In the coil insertion machine of the present embodiment, the third embodiment is described as representing six even slots and the first and fourth embodiments as representing odd slots, but the number of slots is limited. The present invention can be applied without departing from the spirit of the present invention.
Of course, the stripper provided with the auxiliary stripper of the third and fourth embodiments may be applied in combination with the stripper provided with the protruding piece of the second embodiment.
In addition, the interphase insulating paper is inserted following the lower side coil bundle in synchronization with the lower side coil bundle, but of course, it may be inserted slightly later than the lower side coil bundle. is there.
Of course, the coil inserter including the gist of the present invention may be used as a motor manufacturing facility included in a series of manufacturing lines.

-According to the concentrated winding motor manufactured by the coil insertion machine according to the embodiment of the present invention, the coil space factor can be 90% or more, and the coil bundle is inserted by orderly dividing the slot into two. Moreover, it becomes a high-performance electric motor with small vibration.
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The technical scope of the present invention is shown not by the above description but by the scope of the claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of the claims.

1 ... Coil insertion machine,
DESCRIPTION OF SYMBOLS 10 ... Blade shaft, 20 ... Interphase insulation paper guide member, 30 ... Stator core, 40 ... Coil bundle, 50 ... Stripper, 60 ... Interphase insulation paper pusher shaft, 70 ... Interphase insulation paper, 80 ... Auxiliary stripper,
11 ... Blade shaft body, 12 ... Guide member, 13 ... Blade gap, 14 ... Blade gap,
21 ... Inclined portion, 22 ... Side toward the blade gap, 23 ... Guide gap, 24 ... Opening, 25 ... Deep bottom,
31 ... Opening gap, 32 ... Slot, 33 ... Magnetic pole teeth, 34 ... Slot insulating paper, 35 ... Stator core support, 36 ... Stator core,
41 ... Coil bundle, 42 ... Coil bundle, 43 ... Coil bundle, 44 ... Bent portion of end of coil bundle, 45 ... Coil bundle, 46 ... Coil bundle, 47 ... Coil bundle,
51 ... External teeth, 52 ... Projection piece, 53 ... Stretching means for stripper, 54 ... Extraction means,
61 ... Interphase insulating paper pusher sliding space, 62 ... tip,
71: Folding part, 72 ... Flange part, 73 ... End of folding part,
81 ... stripper, 82 ... external teeth, 83 ... coil push-up part, 84 ... hollow part, 85 ... auxiliary stripper, 86 ... auxiliary stripper, 87 ... coil push-up part, 88 ... hollow part, 89 ... stripper,

Claims

In a coil insertion machine for a concentrated winding motor that inserts a coil bundle around each magnetic pole tooth of a stator core in which slots having an opening gap of a desired width on the inner diameter side are annularly arranged,
A plurality of blade shafts arranged in an annular shape in contact with the inner diameter side of the stator core so as to hook adjacent coil bundles, and interphase insulating paper that insulates the coil bundles inserted adjacent to one of the slots. An interphase insulating paper guide member for guiding to the stator core; interphase insulating paper inserting means for inserting the interphase insulating paper between adjacent coil bundles; and a stripper having external teeth for pushing the coil bundle into the slot from the opening gap. Coil bundle pushing means provided,
The tip of the blade gap formed by the adjacent blade shaft body communicates with the opening gap,
The interphase insulating paper guide member is arranged facing the outer diameter direction of each blade gap,
The adjacent coil bundles form a layer in the blade gap, and the outside of the coil bundle formed in layers is hooked by being divided on both sides of the interphase insulating paper guide member,
The coil bundle of the previous layer passes through the opening gap along the blade gap while the outside of the adjacent coil bundle is divided into the interphase insulating paper guide member by one extension of the stripper. In turn, the multi-phase coil bundle is pushed into the slot, and the interphase insulating paper inserting means follows the interphase insulating paper guide member to follow the coil bundle, and inserts the interphase insulating paper along the interphase insulating paper guide member.
A coil insertion machine for concentrated winding electric motors.
Each of the interphase insulating paper guide members forms a shaft body, and includes a guide space penetrating in the shaft body so as to guide the interphase insulating paper along the axial direction, and the guide space is formed in the blade gap. It has a guide gap that opens to face,
The shaft body is an inclined portion having a shape in which a tip portion facing the stator core is lowered on both sides, and a cross-sectional shape of the shaft body is inclined so that a side toward the blade gap is narrowed.
The coil insertion machine for the concentrated winding electric motor according to claim 1.
The interphase insulating paper insertion means includes an interphase insulating paper pusher shaft,
The guide space includes an interphase insulating paper pusher sliding space in a direction along the shaft body,
The guide gap is a narrow gap that is stretched by sandwiching and sliding the interphase insulating paper,
The interphase insulating paper pusher shaft is guided along the interphase insulating paper pusher sliding space, and the interphase insulating paper is inserted.
The coil insertion machine for the concentrated winding motor according to claim 2, wherein
The interphase insulating paper was formed into a substantially T-shape by bending a resin flat plate having electrical insulation with a desired width at the center in the width direction and both sides equally spaced from the center.
The coil insertion machine for a concentrated winding electric motor according to any one of claims 1 to 3, wherein
Each of the external teeth includes a protruding piece formed so as to protrude from the external tooth toward the outer diameter direction,
The protruding piece divides the adjacent coil bundles inserted into the slots, and guides the adjacent coil bundles ahead of the interphase insulating paper.
The coil insertion machine for a concentrated winding electric motor according to any one of claims 1 to 4, wherein the coil insertion machine is a concentrated winding motor.
The coil bundle pushing means includes stretching means for stretching the stripper, and pulling means for pulling the stripper forward,
The stretching means is separable from the stripper, the stripper is pushed up by the stretching means, and after the coil bundle and the interphase insulating paper are inserted into the slot, the stretching means and the stripper are separated, The stripper is locked to the pulling means, and the stripper is pulled over the stator core;
The coil insertion machine for a concentrated winding motor according to any one of claims 1 to 5, wherein
An auxiliary stripper is provided at the tip of the stripper to push up the coil bundle of the previous layer inserted into the slot in advance.
A coil push-up portion formed radially at the tip of the auxiliary stripper, and the coil push-up portion pushes up against the coil bundle of the previous layer;
The coil insertion machine for a concentrated winding motor according to any one of claims 1 to 6, wherein the coil insertion machine is a concentrated winding motor.