JPH0576257B2 - - 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.

Structure and problems of conventional examples In recent years, as home appliances have become thinner, so-called tridal-wound motors, in which windings are perpendicular to the yoke of an annular stator core, have been attracting attention as small motors for home appliances. Bathing.

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 tridal-shaped wire-wound motor will be described.

Figure 1 is a perspective view of the stator part of a conventional toroidal winding motor, Figure 2 is a sectional view showing the connection part inserted into the slot, Figure 3 is a plan view, and Figure 4 is a fixed one. 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 1 of the stator core 1.
The coil is wound perpendicular to a, 3 is the lead wire,
4 is a slot into which the coil 2 is inserted; 5 is a welding part for rejoining the stator core 1 which has been divided into two parts in the radial direction; 6 is a coil terminal crossover wire for routing the coil terminal to the connection part; 7 is a coil terminal; Reference numeral 8 denotes a connecting portion between the coil terminal 7 and the lead wire 3, 9 a connecting portion insulating tube, 10 a wedge for fixing the connecting portion 8, and 11 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, route the farthest coil terminal 7 for connection, fix the coil terminal crossover wire 6 to the coil 2 with tape 6a, etc., then solder the specified lead wire 3 to the coil terminal 7, and connect the connecting part 8. Iron core 1 to be fixed by covering with insulating tube 9
It was inserted into the slot 4 of the machine and fixed with a wedge 10. Thereafter, the connecting wire between the two divided cores created during winding was fixed to the outer periphery of the coil end by taping 17 to complete the stator.

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 with a flyer.

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. In addition, in order to reduce the stacking thickness, the connecting portion 8
It was not possible to bring the coil out to the outside of the coil 2 and fix it, and the coil had to be disposed of inside the slot.

Therefore, the tube 9 and the wedge 10 for fixing the tube 9 are required to insulate the connection part 8, which requires a lot of man-hours for insulation and fixation. 9
This has the drawback that the coil 2 and the wedge 10 must be inserted at the same time, and if the amount of coils 2 in the slot is large, insertion becomes extremely difficult. Furthermore, in order to connect, the coil terminal wire 6 must be routed and fixed with tape 6a, etc., which makes the work complicated, and the number of parts, steps, and man-hours are large, making the work difficult.
This has been a major manufacturing hurdle in creating inexpensive motor stators with stable quality.

OBJECT OF THE INVENTION The present invention eliminates the above-mentioned drawbacks of the conventional technology, and allows the processes of joining the divided iron cores, routing and fixing the coil terminal wires, and insulating and fixing the connection parts to be performed with a significantly smaller number of man-hours compared to the conventional method. The purpose is to provide an electric motor stator that is inexpensive and of stable quality.

Structure of the Invention The present invention provides a structure in which a plurality of legs that fit into slots of an iron core, an annular end face that connects the legs, and a hole that penetrates the legs in the axial direction are made of an insulating material. The connecting end plate is formed by molding, and has an extended end face extending toward the outer periphery of the annular end face of the connecting end plate, and the connecting wire portion of the coil terminal is connected to the coil installed in the slot. The connecting end plate holds and insulates the coil terminal, the external power supply lead wire, and the connecting portion.

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 5 to 8. FIG. 5 is a perspective view of the motor stator of the present invention, FIG. 6 is a perspective view of the connecting end plate, FIG. 7 is a sectional view showing the connecting end plate inserted into the slot 4, and FIG. 8 is the present invention. FIG. 2 is a cross-sectional view of the stator when the entire stator is completed by integrally molding the stator with thermosetting resin or the like to form a housing.

Components that are the same as those in the conventional configuration described above are given the same numbers, and their explanations will be omitted. In the figure, 1
2 is a connecting end plate; 13 is a plurality of cylindrical legs that fit into slots 4 formed in the connecting end plate 12; 1;
4 is a hole penetrated in the axial direction of a predetermined number of legs 13 into which a plurality of connecting parts 8 are individually inserted; 15 is an annular end surface that connects the legs 13; 16 is a terminal bridge through which the coil terminal 7 is routed. It is an extended end face part that fixes the wire. Note that the connection end plate 12 is integrally molded from an insulating resin.

In the above configuration, the connection between the coil terminal 7 and the lead wire 3 of the motor stator of the present invention will be described using FIGS. 9 and 10 as examples.

First, a dedicated coil winding machine (not shown) is used to wind the yoke part 1 on the stator core 1, which has been divided into two parts in advance.
Coil 2 is wound so as to be perpendicular to a.

Next, the positional directions of the coils 2 are aligned, the divided surfaces of the cores 1 are aligned, and the leg portions 13 of the connecting end plates 12 are fitted into the slots 4 to connect the divided cores 1. Next, for connection, the coil terminal crossover wire 6 on the far side
The insulating sleeve 6a is inserted into the coil end connecting wire 6, and the coil terminal crossover wire 6 is fixed by the extended end surface portion 16 formed on the annular end surface 15 of the connection end plate 12, the base of the leg portion 13, and the inner circumference of the coil. . Then, as shown in FIG. 10, the lead wires 3 are individually inserted into the holes 14 of the legs 13 of the connection end plate 12, the coil terminals 7 are wound around them, and the lead wires are connected by soldering. 3
, and insert the connecting part 8 into the hole 14 to insulate and fix the connecting part 8. After that,
Again, as shown in FIG. 5, the connecting wire between the two divided cores created during winding is temporarily fixed by taping 17 on the outer periphery of the coil end, and the plurality of lead wires 3 are attached to a grouping bush 3a. is fixed to complete the motor stator according to the present invention.

As can be seen from the above description, the electric motor stator of the present invention has a connection end plate 12 with a simple structure in which legs 13 are slightly connected by an annular end surface 15, and the iron core 1 is inserted into the slot 4. The two divided iron cores 1 can be easily joined together without the need for a special process of joining them by welding or the like. Therefore,
Since the iron core 1 is formed into an annular shape in the subsequent process, it not only facilitates the work, but also functions as a sufficient connector until the next process of housing molding is carried out. Moreover, the coil 2 is not damaged by heat during welding, and the quality is extremely stable.

In addition, difficult-to-handle parts such as tubes 9 and wedges 10 are not required at all, and insulation can be achieved by simply inserting the connection part 8 into the hole 14 provided in the leg part 13 inserted into the slot 4, which greatly simplifies the number of work steps. can.

Furthermore, since the leg portion 13 is already provided with the hole 14, the connection portion 8 can be easily inserted regardless of the amount of coil 2 that will fit into the slot 4.

Further, in order to pass the coil terminal crossover wire 6 for connection under the extended end face portion 16 provided on the annular end face portion 15, there is no need for fixing work using tape or the like.

Although the above embodiment has been explained using a toroidal wound type motor as an example, it can also be applied to the connection part of a current cylindrical motor (not shown).
In that case, even if the core is not divided like in the toroidal winding type, its function remains the same except for the core binding function.

Effects of the Invention As described above, according to the present invention, in the wiring process of a motor, a leg part that fits into a slot, an end face part that connects the leg part in an annular manner, and a hole that passes through the leg part in the axial direction are provided. A wire-winding end plate is provided with an extended end surface portion that clamps and fixes the wiring crossover portion of the coil terminal extending to the outer circumferential side of the annular end surface with the coil installed in the slot. After that, each split core is connected by fitting it into the slot of each core and fixing it.Then, the wire connection process can be performed very easily after that, and the problems of the conventional connection process can be solved. This is extremely effective in improving quality and productivity.

[Brief explanation of drawings]

Figure 1 is a perspective view of a conventional toroidal winding type 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 same stator molded with thermosetting resin;
FIG. 5 is a perspective view of a stator of a toroidal winding motor according to the present invention, FIG. 6 is a perspective view of a connecting end plate according to the present invention, and FIG. A cross-sectional view showing the state inserted into the
FIG. 8 is a cross-sectional view of a motor stator according to the present invention molded with thermosetting resin, FIG. 9 is a perspective view showing one step of processing a connection using the connection end plate of the present invention, and FIG. It is a perspective view showing one step of the process. DESCRIPTION OF SYMBOLS 1...Stator core, 1a...Yoke part, 2...Coil, 3...Lead wire, 4...Slot, 6...Coil terminal crossover wire, 7...Coil terminal, 8...Connection part , 12... connection end plate, 13... leg section, 14...
Hole, 15...Annular end surface portion, 16...Extended end surface portion.

Claims (1)

[Scope of Claims] 1. A stator core having a plurality of teeth protruding toward the inner diameter side of an annular yoke portion, and a coil installed in a slot of the stator core, the coil being fitted into the slot. a plurality of cylindrical leg parts, an annular end face part that connects the leg parts along the inner diameter side of the stator core and has an extension part on the outer circumferential side, and an end of the coil installed in the slot. A connecting end plate is constructed by integrally forming a predetermined number of holes penetrated in the axial direction of the leg portions with an insulating material into which the connecting portions for the external power supply lead wires are individually inserted. Insert and fix the legs of the connection end plate into the slots,
The connecting portion is inserted into the hole of the connecting end plate to hold and insulate the connecting portion, and the connecting wire portion of the coil terminal is connected to the extended end face portion and the root portion of the leg portion. A motor stator which is held and fixed by an inner peripheral portion of a coil installed in the slot. 2. The stator core is divided into at least two parts in the radial direction, and a coil is wound so as to run perpendicularly into the slot of the stator core, and a plurality of leg parts that fit into the slot and the leg parts are connected to the leg part. The electric motor according to claim 1, wherein the at least two or more divided stator cores are connected by a connection end plate having an annular end face portion connected along the inner diameter side of the stator core. stator.