JPH0431820Y2 - - Google Patents

Description

Detailed Description of the Invention This invention relates to a winding insertion device for press-inserting coils in multiple layers into slots of an iron core in a rotating electric machine, and more particularly to an improvement in the winding insertion jig.

Conventionally, as shown in Fig. 1, 24 slots were used to accommodate 3 outer coils (main coil) and 4 inner coils (auxiliary coils).
The winding insertion device shown in the left half of FIG. 2 is a device for inserting a stator coil having a single-phase four-pole winding pattern into a stator core.

In FIG. 2, 1 is a stator core, 2 is a slot groove, and 3 is an outer layer coil (main coil), which is shown inserted into the slot groove 2 by an upper pusher 7. A blade 6 is arranged on the inner diameter of the stator core 1 and guides the outer layer coil 3 and the inner layer coil 4 to the slot groove 2. On the lower surface of the stator core 1 are a guide that engages with the outer circumferential groove of the blade 6 and into which a wedge (not shown) is inserted, and a stator core 1.
There is a wedge guide 5 that also serves as a receiver. Next, the inner layer coil 4 inserted into the stator core is placed in the gap between the blade 6 and the wedge guide 5, and FIG. It shows. Reference numeral 9 denotes a push rod that applies a pressing force to the lower surface of the lower presser 8, and presses and raises the lower presser 8 by a required amount. 10
is a housing that supports the wedge guide 5 and the blade 6.

The left half of FIG. 3 shows the left half of the cross section of FIG. 2, and the state of insertion of the coil is seen from the bottom of FIG.

Next, the operation of this conventional device will be explained.
In the left half of Figure 2, the lower pressing body (not shown)
The lower pusher 8, which has been pressed by the rise of the pusher rod 9, which has been pushed by the upper pusher 7,
The inner periphery of the stator core 1 is raised as the stator core 1 increases. Accordingly, the tip of the outer layer coil (main coil) 3 comes off from the outermost circumference of the upper pusher 7, and the inner layer coil (auxiliary coil) 4 is further pressed by the lower pusher 8, and the wedge guide 5 is moved with the blade 6 as a guide. It slides on the outer periphery and is inserted into the corresponding slot groove 2A while pushing the connection side 3A of the outer layer coil toward the outer periphery. After inserting the double-layer coils 3 and 4, the push rod 9 is pulled back,
Next, the draw rod 11 is pulled back, so the bolt 1
The upper and lower pressers 7 and 8 fixed by 2 are lowered.

Since the conventional winding insertion device is configured as described above, after the outer layer coil 3 is inserted, the corresponding slot groove 2A of the inner layer coil 4 inserted into the inner layer is inserted.
is the wedge guide 5 as shown in the left half of Figure 3.
The inner layer coil 4 is inserted by pushing out the connection side coil 3A of the outer layer coil 3, which surrounds the outer periphery of the slot groove. When the product factor is high, it becomes difficult to insert the coil, and even if insertion is possible, the coil is often damaged.

This idea was made to eliminate the drawbacks of the conventional ones as mentioned above, and among the inner layer coils,
The height of the outer periphery of the wedge guide located at the center where adjacent coils separate is increased, so that when inserting the outer layer coil, the connection side coil is naturally molded to the outer periphery, and a slot groove corresponding to the insertion of the inner layer coil can be opened, resulting in a high It is an object of the present invention to provide a winding insertion device that allows insertion of a coil having a coil space factor.

An embodiment of this invention will be described below with reference to the drawings.

The right half of FIG. 2 shows an embodiment of the device according to this invention, and the same or corresponding parts as the left half are given the same reference numerals. In the figure, 5A is a wedge guide that has a height H that takes into account the coil thickness when inserting the inner layer coil 4 relative to the height h of the conventional blade 5, and 3B is a wedge guide that has a height H that takes into account the coil thickness when inserting the outer layer coil 3. Outer layer coil 3 molded with
This is the connection side coil.

The right half of FIG. 3 shows the right half of the - cross section of FIG. 2, and the state of insertion of the coil is seen from the bottom of FIG.

When inserting a coil using such an insertion device, it is possible to insert a coil having a high space factor by reducing the external resistance during insertion as much as possible. For this reason, the second
As shown in the figure and the right half of Fig. 3, the wedge guide 5A is raised to near the bottom of the slot groove 2, so that a space for the slot groove 2B corresponding to the inner layer coil 4 is created inside the connection side coil 3B formed by the previous insertion. Since the push rod 9 opened in the outer circumferential direction and pressed from the lower part rises further, the inner layer coil 4 can be easily inserted into the gap sufficiently opened by the lower pusher 8.

In the above embodiment, the winding pattern of a single-phase four-pole stator coil was explained as an example, but the present device can be applied regardless of the number of slots and the number of poles, including a three-phase stator coil. In addition, although the above embodiment was explained as a simultaneous insertion method, even in the case of three-layer formation consisting of outer, middle, and inner layers, two-time insertion method, and three-time insertion method, the connection side coil that has been intermediately formed once is used. Needless to say, since the coil can be expanded in the outer circumferential direction when the coil is inserted thereafter, the same effect as in the above embodiment can be achieved.

As described above, according to the device according to this invention,
The outer circumferential height of the wedge guide located at the parting point between adjacent coils in the inner layer coil is set to a height that takes into account the coil thickness when inserting the inner layer coil, so that the connection side coil naturally moves toward the outer periphery when inserting the outer layer coil. The slot groove corresponding to the insertion of the inner layer coil can be opened after molding, and since the inner circumferential coil is inserted in this state, the insertion resistance is significantly reduced, and the coil space factor of the slot groove is lower than before.
It can be improved by 10% to 20%, and if the amount of coils is kept the same, the slot groove can be made that much smaller, and as a result, the characteristics of the rotating electrical machine are improved.

In addition, if the product molded by this device is configured to have the same characteristics as conventional products,
Since the thickness of the stator core can be reduced, core material and wire material can be saved, resulting in a material-saving rotating electrical machine.

Furthermore, the present device has the advantage that coil forming can be performed at low cost with an extremely simple structure in which the height of the wedge guide is increased.

[Brief explanation of the drawing]

Figure 1 is a winding pattern diagram, the left half of Figure 2 is a sectional view of a conventional insertion device mid-insertion, the right half is a sectional view of the insertion device of this invention mid-insertion, and Figure 3 left half 2 is a bottom view of the cross section seen from below the left half of the - cross section in FIG. 2, and the right half is a bottom view of the cross section seen from below the right half of the - cross section in FIG. 1 is a stator core, 3 is an outer layer coil, 4 is an inner layer coil, and 5 and 5A are wedge guides.

Claims (1)

[Scope of utility model registration request] A blade is arranged on the inner diameter of the stator core and guides the outer layer coil and the inner layer coil into the slot groove, and a guide is arranged to engage with the outer circumferential groove of the blade just below the bottom surface of the stator core and inserts the wedge. A wedge guide that also serves as a receiver for the stator core, an upper pusher that moves up and down along the blade and pushes up the outer coil, and an upper pusher that is integrated with the upper pusher and is located below the upper pusher to push up the inner coil. It includes a lower presser and a push rod that raises and lowers the lower presser,
A winding insertion device for a rotating electric machine, characterized in that the outer circumferential height of a wedge guide located at a parting point between adjacent coils in an inner layer coil is set to a height that takes into account the coil thickness when inserting the inner layer coil.