JPH02273056A - Coil inserting device for rotary electric machine - Google Patents

Abstract

PURPOSE:To prevent the damage of slot insulating paper upon inserting a coil by a method wherein a guide blade is provided with grooves, having the same shape as the shape of a slot in plan and smaller than the slot, while the tip ends of the blade are projected inwardly into the groove at the upper and lower parts of the slot. CONSTITUTION:Grooves 10, having substantially similar shape as the shape of slots 1a in plan and slightly smaller than the slots 1a, are formed at the part of the inside end of a guide blade 9. Further, the tip ends of the guide blade 9, surrounding the grooves 10, are formed so as to be projected slightly inwardly at the upper and lower parts of the slot 1a. According to such a method described above, a force for inserting a coil may be concentrated to the tip end of the guide blade 9 upon inserting the coils 7, 8 whereby the force will never be applied on the corners of the slots 1a of a stator 1 and the damage of insulating paper 2, positioned at the corner, may be prevented. According to this method, the faulty dielectric strength of a rotary electric machine due to faulty insulation may be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a winding insertion device for press-inserting a coil into a slot of a stator core in a rotating electric machine.

(b) Conventional technology Conventionally, this type of winding insertion device for rotating electric machines was
As disclosed in Publication No. 4423, etc., when a stator coil is inserted into a slot of a stator core, a guide divided into a plurality of parts is provided on the end face side of the stator core in order to protect the insulating paper in the slot. The blades are arranged so that they can be attached, and even if the coil occupancy in the slot becomes high, the inclination angle of the coil can be made small, thereby preventing the slot insulating paper from being damaged.

(C) Problems to be Solved by the Invention However, according to the above configuration, a groove that is slightly larger than the planar shape of the slot is usually formed at the end of the guide blade in order to escape the folded part of the slot insulating paper. Since the tip of the blade is slightly recessed above or below the slot, a large force of the coil is applied to the corner of the slot when the fill is inserted, and when the slot occupancy rate of the coil increases, the slot of the insulating paper The parts corresponding to the corners were still easily damaged, leading to poor insulation and poor pressure resistance of the rotating electrical machine.

The present invention has been made in view of the above, and an object of the present invention is to provide a winding insertion device that can reliably prevent damage to slot insulating paper when inserting a coil, and can manufacture a rotating electrical machine that is free from withstanding voltage defects. shall be.

(d) Means for Solving the Problems The present invention inserts a slot insulating paper and a stator coil into a slot of a stator core, and the fixing is performed in order to protect the insulating paper when inserting the stator coil. In the device equipped with a guide blade that can be attached to the end face side of the child core, a groove is formed in the guide blade in the same shape or substantially similar to the planar shape of the slot and that is the same as or slightly smaller than the slot. The tip of the blade surrounding the groove is flush with the peripheral surface of the slot or slightly protrudes inward from the slot, and an insulating paper prevention device is provided in the insertion direction of the insulating paper.

(E) Function The winding insertion device for a rotating electrical machine of the present invention has the above-mentioned configuration.
When inserting the coil, the coil insertion force can be concentrated on the tip of the guide blade, and the force of the coil is not applied to the corners of the slot, thereby surely preventing damage to the slot insulating paper corresponding to the corners. I can do it. Note that the tip of the guide blade is usually polished to a smooth surface, so the insulating paper easily slides along the surface, and even if the tip of the blade slightly protrudes inside the slot, the insulating paper cannot be inserted. can be done smoothly.

Furthermore, since a fall-off prevention device is provided in the insertion direction of the insulating paper, even if the tip of the blade protrudes inside the slot and the insulating paper is not secured to the stator core, the insulating paper cannot be prevented from falling off. , there is no equivalent negative effect on the coil insertion operation.

(f) Example Embodiments of the present invention will be described below based on the drawings.

In the figure, reference numeral 1 denotes a stator core in which a plurality of slots 1a are formed at predetermined intervals on a predetermined circumference. 2
3 is a slot insulating paper inserted into the slot 1a of the stator core 1; 3 is a tooling for a winding insertion device, that is, a coil inserter; a blade 4 corresponding to the inner circumference of the stator core 1 is arranged on the top; This blade 4 and wedge guide 5 are a set, and the wedge guide 5
is arranged on the outside of the blade 4. The blade 4 guides the inserted coil, and the wedge guide 5 engages the coil and guides a wedge (not shown) to be inserted. 6
The presser is disposed on the inner circumference of the blade 4 and has fins between the blades 4, into which a coil is inserted. Reference numeral 9 designates guide blades that are attachable to both end surfaces of the stator core 1 in order to protect the insulating paper 2 when the outer layer coil 7 is inserted into the slot 1a. This blade is divided into a plurality of parts as shown in FIG. 2 in order to be attached to the stator core 1. Further, at the inner end of this blade, as shown in FIG. 3, a groove 10 is formed which has a substantially similar planar shape to the slot 1a and is slightly smaller than the slot.
As shown in FIG. 3, the tip of the blade 9 surrounding this groove is formed to slightly protrude inward above and below the slot 1a. The tip end surface of the guide blade 9 is polished to a smooth surface. Reference numeral 11 denotes a slip-off prevention portion that is integrally provided with the guide blade 9 in order to regulate the insertion position of the insulating paper 2.

In FIG. 1, the left half of A-A shows a state in which the outer layer coil 7 is hung at a predetermined position of the blade 4, and the right half of A-A in FIG. It is expanded in the outer circumferential direction by a molding machine, and expanded into an anti-binding side outer layer fill 7a after molding and a binding side outer layer coil 7b after molding,
The coil inserter tooling 3 is shown placed on top of the wedge guide 5 in engagement with the blade 4 in order to insert the inner layer coil 8.

Next, the operation of this winding insertion device will be explained. First of all,
The stator core 1 with the insulating paper 2 attached to the slot 1a is set in the device. Then, a presser foot (not shown) operates on the upper outer periphery of the stator core 1. Next, guide blades 9 are attached to the upper and lower end surfaces of the stator core 1. At this time, since a groove 10 that is slightly smaller than the planar shape of the slot 1a is formed at the end of the guide blade 9, the tip of the blade 9 surrounding this groove is slightly inside the slot above and below the slot 1a. It becomes a prominent state.

Next, the presser 6 receives appropriate pressure from the lower part of the coil inserter tooling 3 and rises along with the blade 4.
As shown in the left half of A-A in FIG.
As shown in the right half of A-A in the figure, the inner layer fill 8 is inserted inside a predetermined insulating paper 2. At this time, a wedge is inserted together with the coil in order to prevent the coil from coming off in the inner circumferential direction from the slot 1a.

In the winding insertion device configured as described above, the tip of the guide blade 9 is formed to slightly protrude inward above and below the slot 1a, so that it guides the coil insertion force when inserting the coil 7.8. The force of the coil can be concentrated at the tip of the blade 9, so that the coil force does not act on the corner of the slot 1a of the stator core 1, and damage to the insulating paper 2 located at the corner can be reliably prevented. . The tip of the guide blade 9 is polished to a smooth surface, so the insulating paper 2 is inserted while sliding along this surface, and even if the tip of the blade 9 slightly protrudes inside the slot 1a, There is no problem in inserting the insulating paper 2. Furthermore, the guide blade 9 is integrally formed with a slip-off prevention part 11 that regulates the insertion position of the insulating paper 2, so that the locking part of the insulating paper 2 is not attached to the stator core 1. Even without the insulating paper, the insulating paper will not fall out of the slot 1a, and there will be no problem in the coil insertion operation.

FIG. 4 shows another embodiment in which a guide blade 1 is inserted into an insulating paper 12 inserted into a slot 1a of a stator core 1.
4 is provided with a bent portion 13 that is engaged with a protruding portion 15 of the insulating paper 12, and the protruding portion 15 is used to prevent the insulating paper 12 from falling off.

In this embodiment, the tips of the guide blades 9 and 14 are slightly protruded inside the slot 1a, but the same effect can be achieved even if the tips of the blades are made flush with the circumferential surface of the slot 1a. The effect obtained is equivalent and does not depart from the scope of the present invention.

(G) Effects of the Invention As described above, according to the present invention, it is possible to reliably prevent damage to the insulating paper due to slot corners when inserting the fill while maintaining the insertability of the fill and the insulating paper. It is possible to provide a winding insertion device that can manufacture a rotating electric machine without such.

[Brief explanation of drawings]

Fig. 1 is a front view of a winding insertion device showing an embodiment of the present invention, Fig. 2 is a plan view of the winding insertion device showing a state in which a guide bar is attached, and Fig. 3 is the same as Fig. 2. FIG. 4 is an enlarged plan view of the main part of the illustrated guide blade, and FIG. 4 is a front view of the main part of a winding insertion device showing another embodiment. 1... Stator core, 1a... Slot, 2
...Slot insulating paper, 7...Outer layer coil, 8
...Inner layer coil, 9...Guide blade,
10... Groove, 11... Fallout prevention part. 1st figure 21 & t gor 4th bad figure

Claims (1)

[Claims] (1) A slot insulating paper and a stator coil are inserted into the slots of the stator core, and the slot insulating paper and the stator coil are installed on the end face side of the stator core in order to protect the insulating paper when inserting the stator coil. In the guide blade, a groove is formed in the guide blade in the same shape or substantially similar to the planar shape of the slot and is the same as or slightly smaller than the slot, and the tip of the blade surrounding the groove is formed around the slot. A winding insertion device for a rotating electric machine, characterized in that the wire is flush with the surface or slightly protrudes inward from the slot, and is provided with a device for preventing the insulating paper from coming off in the insertion direction of the insulating paper.