JPS6012861B2 - Method and device for inserting stator coils in rotating electrical machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for holding a coil when the coil is inserted into a stator core groove of a rotating electric machine, and an improvement in the device.

A conventional method and its apparatus will be explained with reference to FIGS. 1 to 4.

Attach the coil 5 to the coil insertion blade 3 of the coil insertion pick 1 shown in FIG. 1, push up the coil 5 using the coil stripper 2 as shown in FIG. was. When the coil 5 is inserted by this method, the relationship between the gap 4 of the coil insertion blade 3 and the coil 5 is shown in FIGS. 3a, b, and c as a typical example. The coil stripper 2 moves through the gap 4 of the coil insertion blade 3, pushes up the coil 5, and inserts the coil into the stator core 7, so that the entire insertion resistance of the coil 5 is concentrated on the lowest coil 5a. Therefore, as shown in FIGS. 3a, b, and c, depending on the ratio of the diameter of the magnet wire (hereinafter simply referred to as wire) of the coil 5 and the gap 4 of the coil insertion blade 3, the coil 5 may be inserted into the coil insertion blade 3. The cavity 4 acts as a butterfly. That is, since the wires in a and c in FIG. 3 are aligned, it is possible to insert the coil. On the other hand, in FIG. 3b, since the wires are staggered, the frictional resistance between adjacent wires and between the coil insertion blades 3 causes the wires to collapse as shown in FIG. The wires were damaged, causing wire breakage and the inability to insert the coil. For this reason, the applicable range of the wire diameter of the coil 5 in the gap 4 of the coil insertion blade 3 is limited, and if the wire diameter of the coil 5 is different even in the same stator core, the coil insertion pick-up in the gap 4 of the coil insertion blade 3 may be different. Odor 1 was needed.

The present invention eliminates the drawbacks of conventional jigs, and aims to provide a coil insertion method and device that eliminates wire damage and expands the range of wire diameter applicable to the gap in the coil insertion blade. shall be. Embodiments of the present invention will be described below with reference to the drawings. However, the same parts as in the prior art will be designated by the same reference numerals and detailed explanation will be omitted. FIG. 5 is a side view showing a shell portion of a coil insertion device according to an embodiment of the present invention, and FIG. 6 is a plan view thereof.

In the figure, the same number of coil insertion blades 3 as stator core grooves 7 are arranged circumferentially in a coil insertion jig 1 in an upright manner. Inside this coil insertion jig 3, a coil stripper 2 having a plurality of fins 2a radially on the outer periphery that can freely move in the vertical direction is disposed, and the fins 2a slide vertically in the gap 4. Then, a coil dividing screw 8 is formed in advance by using a J-shaped plastic rod with a handle at one end and threading the outer periphery of the other end.The coil dividing screw 8 may be made of metal. In this case, the surface may be mirror-finished or covered with a paint coating, film, etc. Also, the Z thread 9 is formed so as not to have an acute angle. After being inserted into the gap 4 of the blade 6, it is mounted on the coil stripper 2, and can be rotated and removed at will.The operation of the coil insertion jig 1 will now be described.

With the coil 5 attached to the air gap 4 for each coil from the tip of the coil insertion blade 3, while holding the handle of the coil division screw 8 by hand, for example, insert the coil division screw 8 from the end face with the screw into the coil insertion blade 3. Insert it inside.
When the tip comes into contact with the coil 5, the coil dividing screw 8 is manually (or mechanically) rotated. Then, the coil dividing screw 8 is screwed into the coil group, and the wires of the coil 5 are stored between the screw threads 9 and divided so that they are not adjacent to each other, and the tip of the coil dividing screw 8 is inserted into the head of the coil stripper 2. Continue until reaching . Note that the wire between the threads 9 is held without damaging the coating because the coil dividing screw 8 is made of plastic and has a mirror finish surface, and the threads 9 are not at acute angles. The state reached is shown in FIG. Next, in this state, when the coil stripper 2 is pushed up by a mechanism (not shown), the wire of the coil 5 is removed from the fin 2.
a and the valley of the screw thread 9 and begin to be accommodated in the stator core groove 7. Subsequently, as the head of the coil stripper 2 approaches the top, the wire falls toward the outside of the stator core 6 and comes off the thread 9, and when it reaches the top, the coil dividing screw 8 comes off the wire. The work of inserting the coil into the stator core groove 7 is completed. At this stage of coil insertion work, the wire of the coil 5 receives a force shared by the fins 2a and the valleys of the screw threads 9, so the pushing up force by the fins 2a is weaker than in the past, and the wire's coating is scratched and stretched (wire ridges). (becomes thinner) will no longer occur. Furthermore, in the gap of the coil insertion blade 3, the seventh
Since the wire of the coil 5 is divided by the screw thread 9 as shown in the figure, the insertion resistance when inserting the coil is distributed for each number of turns of the coil group.

Therefore, the insertion resistance when inserting the coil is the lowest coil 5a.
Since the coils act as acids to each other and there is no phenomenon of combing, the coils can be inserted without any problem without crushing, scratching or breaking the wires, resulting in extremely good results in terms of the quality of the stator coil. bring. Further, since the coil 5 in the gap 4 is in the above state, the applicable range of the wire diameter of the coil 5 is unlimited as long as it is equal to or smaller than the gap 4 of the coil insertion blade 3. Therefore, if the stator core dimensions are the same, even if the coil 5 has different wires,
Not only can it be applied with one jig, reducing the cost of picking up shells,
There is no need to change the setup for changing the use of windings, which is extremely advantageous in improving productivity. As described above, according to the present invention, by placing the coil dividing screw on the coil stripper and inserting the coil into the stator core groove, damage to the magnet wire of the coil can be eliminated and the magnet wire can be removed.
A method and device for inserting a coil with an expanded diameter range can be obtained.

[Brief explanation of drawings]

Figure 1 is a partially cutaway side view of the coil set in a conventional coil insertion device, Figure 2 is a diagram of the coil inserted into the stator core groove, and Figure 3 is the coil inserted into the gap in the coil insertion plate. The diagram shows the state in which the coils are set. (a) shows the coils arranged in approximately one row in the gap of the coil insertion blade, (c) shows the coils arranged in approximately two rows, and (b) shows the coils arranged in a staggered pattern. , FIG. 4 is an enlarged view of the line collapse, FIG. 5 is a partially cut-out side view of the coil insertion device according to the present invention, FIG. 6 is a plan view of FIG. 5, and FIG. 7 is the coil according to the present invention. FIG. 6 is a state diagram with a coil in the cavity of the insertion blade. 1... Coil insertion jig, 2... Coil stripper, 2a... Fin, 3...
・Coil insertion blade, 4... air gap, 5...
... Coil, 5a ... Bottom coil, 6.
...Stator core, 7...Stator core groove,
8...Screw for coil division, 9...Screw thread. *Figure 1 *Figure 2 Figure 3 Sickle Figure 4 *Figure 5 *8 jin*7 evil

Claims (1)

[Claims] 1. A method for inserting a stator coil of a rotating electrical machine into a core groove, using a coil stripper that slides along a coil insertion blade and a coil dividing screw that can be freely attached and detached and rotated. By rotating this coil dividing screw, the magnet wires of the magnet wire bundle are divided between the screw and the coil insertion blade so that they do not touch each other, and the coil stripper and the coil dividing screw are simultaneously slid. This method equalizes the tension on each magnet wire by moving the magnet wires and inserting them into the core groove. 2 A plurality of coil insertion blades are fixed upright on a coil jig, and a coil dividing screw provided with a screw on the outer periphery to allow free rotation is removably attached to a coil stripper having a plurality of radial fins on the outer periphery. A rotating electric machine stator coil insertion device characterized in that a coil stripper is disposed inside the coil insertion blade and moved up and down.