JPS58170350A - Rotor for flat motor - Google Patents

Abstract

PURPOSE:To integrate in one body a rotor shaft, a cylindrical commutator and segment coils, etc., surely and firmly by a method wherein a part of a molding to constitute the cylindrical commutator is made to come in contact closely with the whole circumference of a rotor shaft. CONSTITUTION:A cylindrical commutator 12 is engaged with the circumference of the rotor shaft 11. The cylindrical commutator 12 thereof is furnished with three commutator segments 12b provided being separated by every 120 deg. mutually on the outside circumferenctial face of the nearly cap type molding part 12a, and the molding part 12a is made to come in contact closely with the whole circumference of the rotor shaft 11 at the upper wall 12c thereof. Moreover, the flat segment coils 13a-13c are arranged being separated by every 120 deg. mutually on the same plane with the base edge part of the molding part 12a. The segment coils 13a-13c are integrated in one body to be fixed fixing agent 14.

Description

[Detailed description of the invention] The invention relates to a rotor of a flat motor.

Figure 1 shows the conventional rotor of this type.
The rotor shafts h 4 a, 4 b, and 4 c are press-fitted and fixed in a molded part 3 formed by fully fixing the cylindrical commutator 2. Segment coils, 5 are these segment coils 4 a
H4b r 4 c f It is a redundant agent such as a molded resin or adhesive formed as a solid layer together with the cylindrical commutator 2.

In such a rotor configuration, the rotor shaft 1 is fixed by being press-fitted into the substantially circular molded part 3, so that the fixing strength of the rotor thin member 1 in the axial direction cannot be obtained sufficiently. There were drawbacks.

The present invention has been proposed in consideration of the above points, and its purpose is to securely and firmly solidify the fixing agent such as molded resin for fixing the thin rotor, cylindrical commutator, and segment coils all around. A flat motor rotor which improves the bonding strength with the cylindrical rectifier in the axial direction of the rotor, and has a fixed structure that prevents the identification agent from flowing out in the VC direction of the rotor axis for manufacturing convenience. The meeting is to be provided.

Hereinafter, the invention will be explained along with the drawings.

2nd misfortune and 3rd figure VC? 11 is a rotor shaft, and on its chest circumference there is a cylinder that is in close contact with the rotor shaft 11 at an upper wall 12c, which will be described later, and that extends between the rotor shaft 11 and the internal space of the VC foot. The commutator 12 is fitted. This cylindrical commutator 12 is provided with a mutual V on the outer peripheral surface of the approximately hat-shaped molded part 12a.
The molded product 12a is arranged in three commutator pieces 12b' separated by L120°, and the molded product 12a is in contact with the entire circumference of the rotor shaft 11 at its upper wall 12c.

1, flat segment coils 13a, i3b, 13c are on the same plane as the base end of the molded product $12a.
are arranged 120° apart from each other. Note that 14 is an identifying agent such as a molding resin or a soothing agent for integrally solidifying the segment coils 13a, 13b, and 13c.

Next, the solid structure structure of the rotor shaft 11 and the cylindrical flow element 12 will be explained in detail. That is, as shown in FIG. 3 and FIG.
2d is formed with a groove 15 having an appropriate width and depth t that communicates with the outside of the base end tfli 12d and the internal space on the rotor shaft 11 side. It is possible to fill the inside and outside of the molded part 12a so as to fill the inside and outside of the molded part 12a.

A plurality of four portions 16 are formed in a portion of the u-trochanter shaft 11 at a position facing the inner cylindrical surface of the molded part 12a, and the recessed portions 16 are knurled in accordance with eight holes.

Thus, the segment coils 13a, 13b, arranged around the rotor shaft 11 and the cylindrical commutator 12,
13c When solidifying integrally with the rotor shaft 11, etc., the fixing agent 14 passes through the grooves 15 from the outside of the molded part 12a, and connects the cylindrical molded part 12a and the rotor. VC flows into the space surrounded by the child shaft 11, and the recess 16
It also solidifies to bind to the N trochanter shaft 11', and is prevented from flowing out to the outside by the upper wall 12c. Therefore, the cylindrical commutator 12 is surrounded by the vc identification agent 141' (: the inner and outer parts of the cylindrical commutator 12 are solidified integrally with the rotor shaft 11, and the segment coils 13a, 13
A strong fixed structure can be obtained between the rows b and 13c.

As described above, according to the invention, when a part of the molded part constituting the cylindrical commutator is brought into can contact with the entire circumference of the rotor shaft, the V-shaped commutator becomes cylindrical! Since a space is formed in the cylindrical strainer and communicates with the outside of the cylindrical commutator through the FC groove in the first flow coil, the molded part of the cylindrical flow rectifier and the rotor shaft can be connected to each other. The rotor shaft, the cylindrical commutator, the segment coils, etc. are firmly and firmly integrated due to the effect of the fixing agent that wraps around the inside and outside of the cylindrical commutator, and vibrations etc. Therefore, inconveniences such as the rotor shaft coming off can be completely eliminated, and the fixing agent can be effectively prevented from flowing out from inside the cylindrical commutator, providing a structure that is easy to manufacture. Shoulder 0

[Brief explanation of drawings]

Fig. 1) is a plan view of a conventional rotor, Fig. 1 (b) is a view facing A-Alil'l in Fig. 13 (a), and Figs. Examples are shown in Figure 2.R is a plan view, Figure 3 is a bottom view, and Figure 4 is B-- in Figure 2.
BS division 1IIl is evil. 11... Rotor shaft, 12... Cylindrical commutator, 12a... Molded part, 12b...
Commutator piece%12 c...Top wall, 12 d...
... Base end, 13a T 13 b T 13 c・
... Segment coil, 14 ... Fixing agent, 15 ... Groove, 16 ... Concave portion Patent applicant Matsushita Electric Works Co., Ltd.

Claims (1)

[Scope of Claims] (υ arranging flat segment coils on the same plane, cn and the center 8 of the segment coils, and
A rotor shaft is disposed, and a cylindrical commutator is disposed on the tN axis near the circumference of the rotor, and a solid material optical filling is provided between the cylindrical commutator and the segment coil. In the rotor structure of a flat motor having a space for the rotor, a part of the molded part constituting the previous i cylindrical commutator is thoroughly welded in the entire thin mesh of the rotor, and
The same cylindrical commutator circular part VCs This cylindrical commutator has a space that communicates with the outside of the cylindrical commutator through a clear sound formed in the cylindrical commutator. l! l
? ii child. (2) A rotor for a flat motor according to claim 1, wherein a concave portion is provided in the outer Ml direction of the 1g1 trochanter axis facing the cylindrical commutator.