JPH0474934B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention holds and insulates the connection part that connects the coil terminal of the stator of a small motor and an external power supply lead wire (hereinafter referred to as the lead wire). The present invention relates to a motor stator having a connecting end plate.

Conventional configurations and their problems In recent years, as home appliances have become thinner, so-called toroidal-wound motors, in which windings are perpendicular to the yoke of an annular stator core, have attracted attention as small motors for home appliances. is bathed in

Hereinafter, with reference to FIGS. 1 to 4, the connection of coil terminals and lead wires, insulation, and connection structure of divided stator cores in a conventional toroidal wire-wound motor will be described.

Figure 1 is a perspective view of the stator section of a conventional toroidal wire-wound motor, Figure 2 is a sectional view showing the connection part inserted into the slot, Figure 3 is its plan view, and Figure 4 is the fixed part. It is a sectional view when the entire stator is completed by integrally molding the entire stator with a thermosetting resin or the like to form a housing. In the figure, 1 is a stator core divided into two parts, and 2 is a yoke part 1a of the fixed core 1.
The coil is wound perpendicularly to the coil, 3 is the lead wire, 4
5 is the slot into which the coil 2 is inserted, and 5 is the slot in which the coil 2 is inserted.
A welding part for recombining the divided stator core 1, 6 an insulating sleeve of a coil end crossover wire for routing the coil end to the connection part, 7 a coil end,
8 is a connecting portion between the coil terminal 7 and the lead wire 3; 9 is a connecting portion insulating tube; 10 is a wedge for fixing the connecting portion 8;
11 is a thermosetting resin for molding the entire stator.

In the above configuration, the coil terminal 7 and the lead wire 3
To connect the stator core 1, which has been divided in advance, use a special coil winding machine (not shown) to wind the coil 2 so as to be perpendicular to the yoke part 1a. The stator core 1 is welded along the divided portion in a state that is aligned with the stator core 1. Next, the farthest coil terminal 7 is routed for connection, and the insulating sleeve 6 across the coil terminal is fixed to the coil 2 with tape 6a or the like.
A designated lead wire 3 was soldered to the coil terminal 7, and inserted into the slot 4 of the iron core 1 to be fixed by covering the connection part 8 with an insulating tube 9, and fixed with a wedge 10.

However, the conventional configuration as described above has many drawbacks as listed below. In other words, this toroidal-shaped wire-wound motor needs to be made as thin as possible in the stacking thickness direction in order to cope with the thinning of devices. Therefore, the annular stator 1 had to be divided into two parts and wound using a dedicated coil winding machine.

Therefore, after winding, the stator core 1 must be recombined into an annular shape, and welding is a method for joining the divided cores 1 together. However, the coil 2 is easily damaged by the heat during welding, resulting in defects, and it is necessary to separately insulate the welded portion 5 with insulation 5a. Furthermore, in order to reduce the stacking thickness, the connecting portion 8 had to be disposed within the slot without being exposed to the outside of the coil 2.

Therefore, in order to insulate the connection part 8, the tube 9
Also, a wedge 10 is required to fix the tube.
It takes a lot of man-hours for insulation and fixing, and the connection tube 9 and wedge 10 must be inserted simultaneously into the gap in the slot 4 where the coil 2 is installed.
If the amount of coils 2 in the slot is large, insertion becomes very difficult. Furthermore, in order to route the coil terminal wire for connection, the insulating sleeve 6 of the coil terminal wire must be fixed with tape 6a, etc., which makes the work complicated, and the number of parts, processes, and man-hours are large, and the work content is also difficult. This has been a major manufacturing hurdle in creating inexpensive electric motor stators with stable quality.

Purpose of the Invention The present invention eliminates the above-mentioned drawbacks of the conventional art, and allows the processes of joining divided iron cores, insulating and routing the coil terminal wires, and insulating and fixing the connection parts to be performed with a significantly smaller number of man-hours than in the past. The purpose of this invention is to provide an electric motor stator that is inexpensive and of stable quality.

Structure of the Invention The present invention has a plurality of legs that fit into stator core slots, the ends of the legs are connected by an annular part, and a plurality of notches are provided in the side wall of the annular part. The connecting end plate is formed by integrally molding an annular groove with an insulating material so as to provide through holes in the thrust direction in the bottom and legs of the annular groove. In addition, a convex part provided on a part of the fixed core insulator is fitted into the hole at the bottom of the annular groove mentioned above, and after the two are joined by local thermal deformation of the convex part, the coil is connected to the connecting end plate. It holds and insulates the connection between the terminal and the external power supply lead wire.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 5 to 12. FIG. 5 is a plan view of a motor stator using the present invention, FIG. 6 is a plan view of a connecting end plate,
Figure 7 is a cross-sectional view taken along line A-A in Figure 6, Figure 8 is a cross-sectional view taken along line B-B in Figure 6, Figure 9 is a cross-sectional view taken along line CC in Figure 6, and Figure 10 is a cross-sectional view of the connecting end plate. 11 is a side view, and FIG. 11 is a cross-sectional view showing the completed stator of the present invention, which is integrally molded with thermosetting resin to form a housing, and the entire stator is completed. FIG. It is a DD sectional view and is an enlarged sectional view showing a state in which a convex portion provided on a part of the fixed iron core insulation molding is thermally deformed and the connection end plate is fixedly connected. Note that components that are the same as those in the conventional configuration described above are designated by the same numbers, and their explanations will be omitted.

In the figure, 12 is a connection end plate, 13 is a plurality of legs that fit into the slot 4 formed in the connection end plate 12, 14 is an output wire hole formed in the leg 13 for inserting the connection part 8, and 15 16 is an annular groove that improves the insulation of the end connecting wire around which the coil end 7 is routed; 17 is a notch provided on the side wall of the annular groove 16 to connect the coil end 7 to the annular groove 16; It is for introduction. 18 is a core coupling hole provided for coupling to the fixed core side, and 1b is a core insulator. Note that the connection end plate 12 is integrally molded from insulating resin.

In the above configuration, FIGS.
This will be explained using Figure 6 as an example.

As shown in FIG. 13, the stator core 1 is divided into two in advance, and except for the inner diameter surface 20 and the mating surface 21 between the stator cores, the stator core 1 is covered with a core insulator 1b. The insulator 1b is provided with a plurality of protrusions 19.

A coil 2 is wound around the stator core 1 so as to be perpendicular to the vertical iron portion 1a using a dedicated coil winding machine (not shown).
Wind the wire. A coil collapse prevention wall 22 shown in FIG. 14 prevents the coil 2 from coming out from the mating surface 21 of the stator cores.

Next, align the position direction of the coil 2, align the dividing surfaces of the stator core 1, and align the leg 1 of the connection end plate 12.
At the same time, insert the connection end plate 1 into the slot 4.
The protrusion 19 of the core insulator 1b is inserted into the core coupling hole 18 of No. 2.
, and then thermally deforming the tips of the protrusions 19 using a heat fusion machine (not shown), thereby joining the divided stator cores and holding and fixing the connecting end plates 12 ( Figure 12). Next, as shown in FIG. 15, an insulating tape 23 is wrapped around the outer periphery to hold, fix and insulate the connecting wires between the stator cores. To route the coil terminal 7, connect the connecting end plate 1.
It is introduced into the annular groove 16 through the notch 17 provided on the outer periphery of the wire 2 and connected to the lead wire 3 as shown in FIG. Since the lead wire 3 passes through the lead wire hole 14 provided in the leg portion 13 of the connection end plate 12 in the thrust direction, the connecting portion 8 is stored in the lead wire hole 14 by pulling it in the direction of arrow A. insulated and maintained. Note that an insulating sleeve 7b is used only for the coil terminal 7a in relation to other coil terminal routing lines.

In the motor stator having the above configuration, after the core coupling hole 18 provided at the bottom of the annular groove 16 of the connection end plate 12 is fitted into the convex portion 19 of the core insulator 16, the convex portion 19
Using a relatively low temperature (200°C) tool that can thermally deform the core, it is possible to easily join the two halves of the core.
Compared to the conventional method of joining two divided iron cores by welding, the coil 2 is not damaged by the high temperatures during welding and the quality is very stable. In addition,
Although the two-split core joining method of the embodiment does not have as strong a joining force as joining by welding, the joining function is sufficiently performed until the next process of housing molding is performed.

In addition, there is no need for difficult-to-handle parts such as tubes 9 and wedges 10, and the leg 1 inserted into the slot 4
Insulation can be achieved by simply inserting the connecting portion 8 into the lead wire hole 14 provided in the wire opening 14 provided in the wire opening 3, and the number of work steps can be greatly simplified.

Further, since the lead wire hole 14 is already provided in the leg portion 13, the connection portion 8 can be easily inserted regardless of the amount of the coil 2 that enters the slot 4.

Further, since the coil terminal 7 connected to the lead wire 3 is arranged along the annular groove 16, fixing work with tape or the like is not necessary, and the number of locations where the insulating sleeve is used can be kept to a minimum.

Furthermore, as is clear from FIGS. 4 and 11, in the conventional example, the connecting portion 8 is simply inserted directly into the tube 9, and when molding the thermosetting resin 11,
It may come off due to fluid pressure, and it is necessary to fix it separately with adhesive, etc. However, in the present invention, since the lead wire 3 is taken in the opposite direction to the insertion direction of the coil terminal 7, the resin 11 It has various advantages such as not moving even when molded, and also being able to stabilize quality, making it possible to significantly reduce the number of man-hours compared to conventional connection work.

Effects of the Invention As described above, according to the present invention, in the motor connection process, the two divided stator cores can be connected and the connecting end plates can be held and fixed at the same time.

Furthermore, in order to ensure the insulation of the lead-out wire at the coil terminal, notches are provided at important points in the annular groove and its side wall, thereby dramatically reducing the use of insulating tapes and insulating sleeves.

In addition, it is easier to insulate the connection between the lead wire and the coil terminal, solving the problems of conventional connection processing.
This is extremely effective in improving quality and productivity.

[Brief explanation of drawings]

Figure 1 is a perspective view of a conventional toroidal winding motor stator, Figure 2 is a sectional view showing the connection part inserted into the slot, and Figure 3 is the connection part inserted into the slot. FIG. 4 is a cross-sectional view of the stator molded with thermosetting resin, FIG. 5 is a plan view of the stator of the toroidal wire-wound motor according to the present invention, and FIG. 6 is a connection end plate according to the present invention. 7 is a sectional view taken along the line A-A in FIG. 6, and FIG.
The figure is a sectional view taken along the line B-B in FIG. 6, FIG. 9 is a sectional view taken along the line C-C in FIG. 6, FIG. 10 is a side view of the connection end plate, and FIG. 11 is a toroidal winding type according to the present invention. A cross-sectional view of a motor stator molded with thermosetting resin, FIG. 12 is an enlarged cross-sectional view showing the connection state of the connecting end plate and core insulator of the present invention, and FIG. 13 is a cross-sectional view of a motor stator molded with a thermosetting resin. Plan view of the two-part core piece, 1st
Fig. 4 is a side view of the same, Fig. 15 is a plan view showing a state in which two divided core pieces each having a toroidal winding are connected using the connecting end plate of the present invention, and Fig. 16 is a side view of the same, Fig. FIG. 3 is a side view showing the connection state of the coil terminal wire and the lead wire. 1...Stator core, 1a...Yoke part, 1b...
Iron core insulator, 2... Coil, 3... Lead wire, 4...
...Slot, 7...Coil terminal, 8...Connection part,
12... Connection end plate, 13... Leg portion, 14... Output wire hole, 15... Annular portion, 16... Annular groove, 17...
...Notch, 18... Core coupling hole, 19... Convex portion.

Claims (1)

[Claims] 1 The stator core is divided into at least two parts in the radial direction, has a plurality of teeth protruding toward the inner diameter, key points of the core are insulated by core insulators, and coils are installed in the core slots. In the electric motor stator, a plurality of protrusions are provided integrally with the core insulator in the core stack thickness direction on the end face of the tooth portion, and a thrust A leg portion having an output wire through hole in the direction, an annular groove for insulating the coil terminal lead-out wire, and a plurality of notches on the side wall thereof are integrally formed, and the convex portion is fitted into the hole of the connection end plate. By fixing, the split iron cores are connected via the connection end plate, and the coil terminal lead-out wire is introduced into the annular groove, and the connection part with the lead wire is housed in the hole of the leg part for insulation. electric motor stator.