JPS6218941A - Motor - Google Patents

Abstract

PURPOSE:To facilitate the insertion of a wedge into the slot by getting the wedge to screw easily to the slot. CONSTITUTION:In a wedge 10, lugs 12a and 12b are formed extending each part at and around one edge 11a and the other edge 11b out of a sheet member 11. Between edges 11a and 11b a narrow space 11c is formed. The front edge 12a of the lug 12a is formed so that the angle theta with the sheet member 11 may be acute. When the skew is formed to a core 6, the wedge 10 is inserted screwing into the narrow space 11c and can easily be inserted adjusting itself to the direction of the slot. In addition, now that the lugs 12a and 12b come up with holding the conductor in, the wedge would not be removed easily from the opening of the slot.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electric motor in which a wedge is inserted into the slot to prevent a conductive wire wound within the slot from jumping out of the slot.

Conventional technology A conventional electric motor of this type will be explained below.

Figures 6 (a) and (b) show a plan view and a perspective view of the rotor of the electric motor (however, in (b), conductors and wedges are not shown), and in the figure, 1 is The inner core is made by laminating a plurality of core sheets formed by punching out electromagnetic steel plates, and a slot 2 is provided on the outer periphery of the inner core, and a conductor 3 is wound within this slot 2. . 4
is a wedge that prevents the conductive wire in the slot from jumping out from the slot opening H2a, and is made of an insulating material. 5 is an outer core made of an electromagnetic steel plate like the inner core 1, and is press-fitted onto the outer periphery of the inner core 1. The shape of the wedge 4 is generally a rectangular plate with both ends bent as shown in FIG. 7, or a substantially rectangular shape as shown in FIG.

Problems to be Solved by the Invention When using a core 6 with a skew formed as shown in FIG. 9, the wedge must be twisted when inserted. The shape shown in Figure 7 had the problem that both sides of the wedge were bent over the entire length, making it difficult to twist and very poor workability. Although the shaped wedge can be easily inserted into the slot, it is not shaped to enclose the conductor 3 like the wedge shown in Fig. 7, so there is a problem that the wedge can easily come off from the slot opening. there were.

Furthermore, when using a core as shown in FIG. 9 in which a skew is formed, the problem that the wedge easily comes off becomes even more pronounced.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electric motor that employs a wedge that can be easily inserted into a slot even if a skew is formed in the core, and that does not come off from the slot opening.

Means for Solving the Problems In order to solve the above problems, the electric motor of the present invention includes a core made of a magnetic material and provided with slots, a conductive wire wound in the slots of this core, and a conductive wire wound in the slots of the core. and a wedge disposed between the opening and the conductive wire, and the wedge has ears extending from the flat member on the left and right near both ends of the flat member, and the upper and lower ends of the wedge. At least one narrow portion is formed between the portion and the portion.

Effect: The above configuration makes it easier to twist the wedge inserted into the slot, so even if a skew is formed in the slot, the wedge can be inserted easily while being twisted.
Ear portions are formed on the left and right sides of both ends of the wedge, and since the eel portions are shaped to embrace the conductor, the problem of the wedge coming off from the slot opening can be solved.

Embodiment Hereinafter, a motor according to an embodiment of the present invention will be described with reference to the accompanying drawings.

Incidentally, the plan view and perspective view of the rotor used in the electric motor according to one embodiment of the present invention are shown in FIG. 6 (a) used in explaining the conventional example.
) and (b), so they will be omitted.

The characteristic feature of the electric motor of this embodiment is the shape of a wedge 10, as shown in FIG.

In other words, the wedge 10 according to this embodiment has a flat plate-like member 11
By forming ear parts 12a and 12b extending to the left and right near one end 11a and the other end 11b,
A narrow portion 11c is formed between the end portion 11a and llb.

Furthermore, the ears 12a and 12b are bent in the same direction. A side view of the wedge with the ears bent is shown in FIG. As can be seen in this figure, the front edge 12a' of the ear 12a is formed so that the angle θ it makes with the flat member 11 is an acute angle.

The wedge 10 formed as described above is inserted from the end portion 11a into the slot formed in the core (by the way, since the wedge used in this embodiment has the narrow portion 11c, this wedge It can be easily twisted as shown in Figure 3.

Here, if a skew is formed in the core 6 as shown in FIG. 9, the wedge 10 will be inserted with the narrow part 12c twisted, and the wedge 10 will be inserted easily according to the orientation of the slot. It is possible. In addition, the ear portions 12a, 1
2b hugs the conductor 3, so the wedge does not easily come out of the slot opening.

Further, FIGS. 4(a), (b), and (c) show a side view of the core, a cross-sectional view of the main part, and an enlarged side view of the main part in a state in which the wedge insertion is completed. As can be seen in the figure, when the insertion of the wedge 10 is completed, the ends 11a and llb of the wedge are
Approximately half of the protruding portion protrudes from the end surface portion 6a of the core, and this protruding portion has an approximately U-shape with an ear portion 12a formed thereon, so that the conductive wire and the end surface portion of the core are separated from each other as shown in FIG. 4(b). 6
This also means that a sufficient insulation distance X from a can be ensured.

Moreover, in addition to the wedge shape described above, various modifications such as a wedge shape as shown in FIG. 5 are conceivable.

Effects of the Invention As has become clear from the above explanation, the electric motor of the present invention includes a core made of a magnetic material and provided with a slot, a conductive wire wound in the slot of the core, and a conductor wire wound in the slot of the core. a wedge disposed between the opening and the conducting wire, the wedge having ears extending from the flat member on the left and right near both ends of the flat member, and the upper and lower ends of the flat member. By forming at least one narrow part between the wedge and the slot, it is easy to insert the wedge into the slot, and the installation state is stable, so that the wedge does not come off from the slot opening. There is no need to put it away.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a wedge used in an electric motor according to an embodiment of the present invention, Fig. 2 is a side view of the wedge, Fig. 3 is a perspective view showing the wedge in a twisted state, Fig. 4(a), (b),
(c) is a side view, main part cross-sectional view, and main part enlarged side view of the rotor in a state where the wedge insertion is completed, FIG. 5 is a perspective view of the wedge according to another embodiment, and FIG. ), (b)
7 and 8 are perspective views of a wedge used in a conventional electric motor, and FIG. 9 is a perspective view of a core in which a skew is formed. 1... Inner core 2... Slot
3... Conductor 4... Wedge 5...
...Outer core 6...Core 11...
・Flat member 11a, llb... End portion 11
c...Narrow part 12a, 12b...
・Name of attorney for ear department: Patent attorney Toshio Nakao and 1 other person/θ
---We Noshi' /2shi Figure 5 σ) Nko d) \O\

Claims (3)

[Claims] (1) A core made of a magnetic material and provided with a slot, a conductive wire wound within the slot of the core, and a wedge disposed between the opening of the slot and the conductive wire. However, this wedge is formed by forming ear portions extending from the flat plate member on the left and right near both ends of the flat plate member, and forming at least one narrow portion between the upper end and the lower end. An electric motor featuring: (2) The electric motor according to claim 1, wherein the ears formed near both ends partially protrude from the end surface of the core. (3) The electric motor according to claim 1, wherein a skew is formed in the core.