JPS59191445A - Small-sized motor - Google Patents

Abstract

PURPOSE:To protect crossover wirings and connecting portion of the wirings without providing a protecting tube or the like by constructing a holding cylinder which connects the wirings when molding a stator core with synthetic resin and protecting walls formed along the circular periphery at both sides of the cylinder. CONSTITUTION:A plurality of iron plates which are made of silicon steel plates or electrical sheets and formed with notches so as not to disturb a magnetic path on the outer periphery of a yoke, are laminated by using calked parts so that the notches are continued to form a core 6. The core 6 is insulated by a synthetic resin material 11, a holding cylinder 16 insulated at the peripheral wall with synthetic resin at the continued notches, wiring protecting walls 17, 18 formed at both sides of the cylinder 16 along the circumference of the yoke of the core 6, and a supporting rod 19 of a stator wiring 12 are integrally formed of the synthetic resin. Since the connections of the wirings are performed in the cylinder 16 in this manner, separate protecting means is not necessary.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a small electric motor, and particularly relates to insulation of a stator core.

(b) Prior art In general, the insulation between the iron core, stator windings, and wiring of an electric motor was constructed by inserting a single sheet of insulating paper into the slot portion of the iron core, which took more time than necessary to assemble. Moreover, the insulating paper sometimes fell out of the slot.

Furthermore, instead of using insulating paper as mentioned above, a synthetic resin with good insulation, heat resistance, and low moisture absorption is used to create insulating materials between the stator windings and wiring, such as in the slots and yoke parts of the iron core. There were some that were molded in such a way that they were interposed to maintain the necessary insulation distance. Although such insulating means ensures insulation between the iron core and the stator windings, it cannot sufficiently protect the wiring that connects each stator winding. Even in the design of smaller electric motors in recent years, protective cables have been frequently used to protect wiring. Therefore, when the wiring is long and the number of connections is large, the number of manufacturing steps increases, which hinders further miniaturization.

(c) Object of the Invention The present invention, which was made in view of the above problems, provides an electric motor that does not require any special means such as a protective chip as a wiring protection means and is smaller than the conventional motor.

B) Structure of the Invention The small electric motor of the present invention has a notch for wiring connection on the outer periphery, and has an iron core made by laminating a plurality of iron plates made of silicon steel plates, electric iron plates, etc. so that the notches are continuous. wiring protection walls formed on both sides of the notch along the circumference of the yoke portion;
The stator winding and the insulating part of the wiring are integrally formed with synthetic resin to insulate the stator winding from the iron core, the wiring from the iron core and the bracket, and protect the wiring.

(E) Embodiments Below, embodiments of the present invention will be explained based on FIGS. 1 to 6. First, in FIG. 1, (1) and (2) are brackets for a small electric motor, and this bracket (1) , (2) are drawn and formed using the same mold, and in particular, a through hole (4) through which the rotating shaft (3) passes is formed in the bracket (2).

(5) is a rotor that includes the rotating shaft (3), an iron core (6) made of laminated iron plates made of silicon steel plates or electric iron plates, and a permanent magnet (7) made of ferrite material glued around the iron core (6).
). (8) is supported by the bearing metal of the rotating shaft (3) in a self-aligning structure. (9) is iron core 00
), synthetic resin material (former), stator winding 02, etc., and has a structure as shown in FIGS. 2 and 3. In other words, as shown in Fig. 4, a notch Q31 is formed on the outer periphery of the yoke, which is made of a silicon steel plate, an electric iron plate, etc., so as not to obstruct the magnetic path.
The iron core (6) is constructed by laminating a plurality of iron plates (14) provided with the notches 03) using the caulked parts (151) so that the notches 03) are continuous, and the iron core (6) is insulated with a synthetic resin material (lυ). At the same time, wiring protection walls are installed on both sides of the retaining cylinder (old and retaining cylinder 06 on the side of the circumference of the yoke part of the iron core (6)) whose peripheral wall is insulated with synthetic resin where the notch is continuous. (17), (1
The stage and the support rod (191) of the stator winding (121) are integrally molded with synthetic resin.
Guide the spider's crossover wire into the wiring protection wall 07) and inside the 0 mark (this is a guide rod).

Further, (2) is a groove for inserting a winding when the number of turns of the stator winding increases and the winding is required to be inserted.

・The stator winding (1) is attached to the configured stator (5) as described above
5 and 6, the state in which the stator winding (1) is supported by the support rod (191), and the stator winding (1) is The stator winding (1) can also be fixed. Also, the crossover wiring from the fixed pre-winding a (1) can be connected to the protective wall α7 through the guide rod (2 ()),' (181). This guide rod (A) is used to facilitate the pulling out of the crossover wiring when indexing the winding machine. Wall (lη,
By installing it between (]8), it is insulated and protected from the iron core and bracket. Connections between the wires are made inside the holding tube (16), and in addition to insulating and protecting the iron core and bracket, the connecting portions are separated from the crossover wires, eliminating the need for separate protection means.

The above-mentioned crossover wiring is connected to the external lead line (23)-\ via the connector (221''aj).

Note that the notch 03) of the iron plate α41 in the above embodiment is not limited to the above-mentioned shape. It is.

(f) Effects of the invention As described above (the stator of the small electric motor of the present invention has a holding cylinder for connecting the crossover wiring when the iron core is molded with synthetic resin, and protective walls along the circumference on both sides of this holding cylinder). Since I have configured
It is possible to protect the crossover wiring and the connections between the crossover wiring without separately installing protective means such as conventional protective tubes, and at the same time, it is completely insulated from the iron core and bracket except for the open parts. be.

Incidentally, after the wiring is provided on the protective wall, the effect of protecting and insulating the wiring can be increased by molding the opening in the protective wall with an insulating material or by fitting an insulating plate from above.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a small electric motor showing an embodiment of the present invention, FIG. 2 is a front view of the stator shown in FIG. 1, FIG. 3 is a nt-nr sectional view of FIG. 2, and FIG. FIG. 5 is a front view of the iron plate shown in FIG. 1, FIG. 5 is a front view of the stator shown in FIG. 2 with stator windings and connectors attached, and FIG. 6 is a side view of FIG. (6)...Iron core, (II)...Synthetic resin part, 0
4-tipped stator winding, (131-・notch, (141・
... Iron plate, (17), (181 river fm protection wall. Figure 1 Figure 2 Figure 4 Figure 4

Claims (1)

[Claims] (1) An iron core with notches for wiring connections on the outer periphery, and multiple notches made of silicon steel plates, electric iron plates, etc. stacked in a row, along the circumference of the yoke part of this iron core. A small electric motor @0 characterized by the wiring protection walls formed on both sides of the notch, and the insulating parts of the stator winding and wiring, which are integrally formed with synthetic resin.