JPH05138453A - Method for disassembling stator of dynamo-electric machine - Google Patents

Abstract

PURPOSE:To provide a method for disassembling a stator of a dynamo-electric machine, which can separate a coil from an iron core easily and recover the all quantity of the coil to use it effectively. CONSTITUTION:In this method for disassembling a stator of a dynamo-electric machine, iron core projecting parts 6 respectively forming a narrow opening 5 of each slot 4 in an inner hole 3 are cut for elimination, and a coil end 8 exposed out of the iron core in one end of the iron core is pushed toward the center of the iron core over the circumference to extrude the coil edge 9 from the inside of the slot 4 to the iron core inner hole 3, and the apparent outer diameter of the coil end 8 is made smaller than the iron core inner hole 3, and the coil end 8 is pushed to the core direction to draw out a coil 7 from the iron core inner hole 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention relates to a rotary electric machine,
The present invention relates to a stator disassembling method for a rotating electric machine that separates an iron core and a coil that form the stator.

[0002]

2. Description of the Related Art A general vehicle is equipped with a generator for charging a battery driven by an engine, an electric motor for starting the engine, and the like.

In the process of manufacturing a small-sized generator or electric motor (hereinafter simply referred to as a rotating electric machine) mounted on a vehicle of this type in a manufacturer, the stator, which is the main component of the manufacturer, has many defective products. However, these defective stators are generally discarded as they are.

Also, most of the rotating electric machines mounted on a vehicle that are taken out when the vehicle body is disassembled or replaced with new ones when they break down are often discarded without being reused.

By the way, a stator, which is a main component of a rotating electric machine, is formed by combining an iron core and a coil. Particularly, since the coil is required to have high conductivity, expensive pure copper is used, and the quantitative ratio thereof is also used. Although it is considerably expensive, it is not preferable to dispose of it without recovering it in terms of effective use of resources.

Therefore, it is naturally conceivable to recover the coil which constitutes the stator of the rotating electric machine and reuse it as a copper material.

[0007] However, the stator of the rotating electric machine as described above generally has a large number of semi-closed slots (grooves in which narrowed openings are formed by the iron core protrusions facing each other in the openings) which are opened in the iron core middle holes. A punched laminated core is used, and the coil has a bent coil end exposed outside the core and a straight coil side that is housed in the slot of the core, and the coil side is housed in each slot It is firmly fixed using, and the combination of the iron core and the coil is extremely strong and cannot be easily disassembled.

In order to separate the core from the coil for the purpose of recovering the coil with such a stator, conventionally, one of the coil end portions projecting to both ends of the core is cut along the end surface of the core, and this cutting is performed. A method has been proposed in which the coil end face is hammered to extract the coil side from each slot.

[0009]

However, in order to cut one coil end along the end face of the iron core as described above, a large number of wire bundles must be cut for each slot. It is complicated and time-consuming. Also, even if the cut side of the cut coil side is hammered and pulled out from the slot, it is not easy to pull out because the coil side is firmly fixed in each slot, which is also troublesome. It becomes work. Furthermore, in order to extract the coil sides from all the slots at once, when using a dedicated punching tool equipped with a large number of punching rods adapted to each slot on the iron core end surface, to use this punching tool, The tips of a large number of punched rods must be precisely aligned with the corresponding slots, and the handling thereof is complicated. Further, in order to cope with various rotary electric machines, it is necessary to prepare various kinds of punching tools according to the types of rotary electric machines.

After all, the method of cutting one coil end portion to separate the iron core and the coil is very troublesome from the practical point of view, the work is complicated and the processing capacity is low, and the coil recovery cost is not only increased. There is also waste due to coil cutting, and it is impossible to deal with the current situation where a huge amount of stators (rotary electric machines) are discarded.

The present invention has been made in view of the above points, and provides a stator disassembling method for a rotating electric machine, which can efficiently and easily separate the iron core from the coil without cutting the coil and recover the entire amount of the coil. The purpose is to provide.

[0012]

In order to achieve the above object, the gist of the present invention is to provide an iron core for forming a narrowed opening of a slot with an iron core middle hole for separating the iron core of the stator from the coil. Remove the protrusion and press the coil end exposed outside the core at one end of the core toward the center of the core around the entire circumference to push the coil side out of the slot into the inner hole of the core to make the coil end visible. A stator disassembling method for a rotary electric machine is characterized in that the upper outer diameter is made smaller than that of the core hole, and the coil end is pressed in the axial direction to extract the coil from the core hole.

[0013]

The core protrusion that forms the narrowed opening of the slot in the core inner hole is easily removed by the lathe. After that, the coil is pressed and deformed from each slot that is greatly opened in the core hole to push the coil side into the core hole, and the coil and core are easy to push out from the core hole. It can be separated into two parts, and the entire coil can be collected.

[0014]

Embodiments of the present invention will now be described with reference to the drawings.

FIGS. 1 (a), 1 (b) and 1 (c) are process drawings showing an embodiment of the present invention.

(A) The stator 1 taken out by dismantling the rotating electric machine has a core lathe 6 which forms a constriction opening 5 of a slot 4 in a core core hole 3 of the core 2 by a lathe.

(B) A plurality of circular arrangements are provided in which a stator 1 is fitted and held in a cylindrical holding base A and arranged around the holding base A corresponding to a coil end portion 8 exposed above the iron core 2. The pressing mechanism B is used to press the coil end portion 8 around the entire circumference toward the center of the iron core. In this way, the upper half of the coil 7 is deformed, the apparent outer diameter of the coil end portion 8 is reduced, and the coil side 9 extends from each slot 4 that is greatly opened in the core hole 3 to the core hole 3.
Is extruded into.

By the pressing by the pressing mechanism B, the apparent outer diameter of the coil end 8 becomes smaller than the diameter of the core hole 3 finally. On the coil end side below the core 7 where the coil 7 is not deformed, a part of the coil side 9 is in the slot 4.

(C) When the pushing mechanism B returns to the original position, the pushing mechanism C arranged above the holding table A is used to push the coil end 7 in the axial direction (downward). Hole 3
In the process in which the coil end 8 having an apparent outer diameter smaller than the diameter passes through the inside of the core core hole 3, all the coil sides 9 come out of each slot 4 and the core 2 and the coil 7 are completely separated.

[0020]

As described above, according to the present invention,
When the iron core protrusion that forms the constriction opening of the slot in the iron core inner hole of the iron core is removed by the lathe, each slot is largely opened in the iron core middle hole. After pushing out the coil side from the core hole to the core hole, it is easy to pull out the coil from the core hole, and the core and coil can be separated efficiently, enabling a large amount of processing. To do. Therefore, in response to the large number of vehicles manufactured due to the development of motorization, the present invention can be taken out of discarded vehicles, including many defective stators that appear in the process of manufacturing vehicle-mounted rotating electrical machines. This is extremely useful in disassembling the stator of the rotating electric machine that has been replaced with a new one, and recovering the entire amount of the coil, thereby making effective use of resources.

[Brief description of drawings]

1A, 1B, and 1C are process drawings showing an embodiment of the present invention.

[Explanation of symbols]

 1 ... Stator 2 ... Iron core 3 ... Iron core middle hole 4 ... Slot 5 ... Constriction opening 6 ... Iron core protrusion 7 ... Coil 8 ... Coil end 9 ... Coil side A ... Holding base B ... Pressing mechanism C ... Extrusion mechanism

Claims (1)

[Claims] 1. To separate the stator core from the coil,
Remove the core protrusion that forms the constriction opening of the slot in the core core hole, and press the coil end exposed outside the core at one end of the core toward the core center around the entire circumference to move the coil side from inside the slot. Rotation characterized by extruding into the core inner hole, making the apparent outer diameter of the coil end smaller than that of the core inner hole, and pressing the coil end axially to extract the coil from the core inner hole. Electric motor stator disassembly method.