JPS5926781Y2 - rotating machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotating machine such as a generator or an electric motor, and specifically relates to a rotating machine that uses a ring-shaped magnet as a rotor.

Generally, a direct drive motor for a record player is known as a rotary machine that uses a ring-shaped magnet as an output.

As shown in Figs. 1 and 2, this motor is constructed by gluing a ring-shaped magnet 8 to the inner peripheral surface of a metal shield case 1 which is screwed to the back of the turntable 1 through screw holes 9. On the other hand, the stator, which is opposed to the rotor, rotatably supports the motor shaft 2 with a bearing 3 provided in the case 4, and has a coil 6 wound around a stator core 5 provided integrally with the case 4. The motor shaft 2 constituting the stator is connected to the turntable 1 constituting the rotor through the through hole 10 of the shield case I constituting the rotor. Ring magnet 8
and the stator core 5 on the stator side are made to face each other (
·Ta.

In a motor having such a configuration, as shown in FIG. 3, the ring-shaped magnet 8 is magnetized in the order of north pole, south pole, and north pole in the circumferential direction.
Rotational force is generated by repeating magnetic attraction and repulsion between the stator core 5 and the stator core 5 which are close to each other on the inner peripheral surface, and the rotational force is transmitted to the turntable 1 via the shield case 1.
The turntable 1 is rotated around the motor shaft 2 by the transmission to the motor shaft 2, and the shield case 1 follows the magnetic path of the ring-shaped magnet 8 as shown in the arrow in FIG. As shown, it was formed on the inner circumferential surface from the N pole to the S pole, and on the outer circumferential surface it was assisted in forming from the S pole toward the N pole.

However, in a motor with such a configuration, the shield case 1 is integrally formed of a magnetic material (metal), and the attachment part to the turntable 1 is formed inside the shield case 1. shield case 7
In order to prevent the lines of magnetic force emitted from the inner peripheral surface of the ring-shaped magnet 8 attached to the shield case 7 from being absorbed by the shield case 7, a cut-out 11 is provided in the shield case γ to separate the bottom surface of the ring-shaped magnet 8 from the shield case γ. There is a need,
Therefore, there were disadvantages in that space efficiency deteriorated and the number of man-hours required for manufacturing the shield case increased.

The present invention is intended to eliminate such conventional drawbacks, and the rotating machine of the present invention will be described below with reference to drawings of embodiments.

That is, as shown in FIG. 4 and FIG.
An engaging hole 31 is provided in the elastic tongue piece 30 formed between the cut grooves 29, and the elastic tongue piece 30 is used as a mounting part to fit into the mounting part 25 of the rotating body 24 as shown in FIG. The engaging hole 31 of the elastic tongue piece 30 is engaged with the protrusion 32 provided on the mounting portion 25, and the rotor A main shaft forming a stator (not shown) disposed oppositely within the ring-shaped magnet 22 forming the ring magnet 23 is inserted through the main shaft forming the stator (not shown).

When configured in this way, the shape of the shield case 21 is simple and easy to configure, and the attachment of the rotor 23 to the rotating body 24 is quick and easy, and the attachment part to the rotating body 24 is located in the direction of the outer circumference of the ring-shaped magnet 22. Therefore, there is no need to provide a space between the shield case 21 and the ring-shaped magnet 22, and space efficiency can be improved.

As described above, according to the present invention, a ring-shaped magnet is provided on the inner surface of one end of the cylindrical shield case made of a magnetic material, and the other end of the cylindrical magnet is used as the mounting part and is attached to the mounting part of the rotating body. Since we use a rotor that looks like this,
The shape of the shield case itself is simple and easy to assemble, and it is also easy to attach to the rotating body of the rotor.
Since the attachment part of the rotor to the rotating body is located outside the box-shaped part of the shield case where the ring-shaped magnet is provided, its practical value is extremely high, such as increasing space efficiency.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional rotating machine, Fig. 2 is an enlarged sectional view of its main parts, Fig. 3 is a plan view of its main parts, and Fig. 4 is a perspective view showing an embodiment of the rotating machine of the present invention. , FIG. 5 is an assembly diagram thereof. 21... Shield case, 30... Tongue piece, 22... Ring-shaped magnet, 31...
... Hole, 24 ... Rotating body, 32 ...
Mounting part, 28...Through hole.

Claims (1)

[Scope of utility model registration request] A rotor has a cylindrical shield case with a tongue piece with a hole formed at one end, a ring-shaped magnet is provided at the other end, a mounting part that fits into the hole, and a transparent hole through which the main shaft of the stator passes through the center. A rotating machine comprising a rotating body provided with a hole, the rotor and the rotating body being integrated through the hole and a mounting portion.