JP3017147U - Outer rotor type motor - Google Patents

Abstract

(57) [Summary] [Objective] The present invention relates to an outer rotor type motor,
An object of the present invention is to obtain a motor that can increase the surface area of a rotor support member that connects a rotor and a rotation shaft. [Structure] In the outer rotor type motor according to the present invention, a rotor supporting member for coupling a rotor and a rotating shaft is formed in a hemispherical shape having a diameter substantially the same as the diameter of the rotor, and the rotating shaft is located at the center of the bottom of the hemisphere. The object is achieved by a structure in which the rotor is fixed to the open end of the hemisphere.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an outer rotor type motor, and more particularly to a structure suitable for driving a small display.

[0002]

[Prior art]

 FIG. 2 is a cross-sectional view showing the structure of an outer rotor type motor according to the prior art. 1 is a stator iron core, 2 is a stator winding, 3 is a rotor, 4 is a rotary shaft 5 and a rotor 3 are coupled to each other. A bowl-shaped rotor support member, 6 is a stator support member, and 7 is a bearing, which is fixed by the action of a magnetic field generated on the outer peripheral surface of the stator iron core 1 when a predetermined current is applied to the stator winding 2. The rotor, which is rotatably supported by the iron core and the air gap, rotates and acts as a motor.

[0003]

[Problems to be solved by the device]

 When the outer rotor type motor according to the related art as described above is used as a small display by appropriately displaying the surface of the rotor supporting member, the surface area of the bowl-shaped rotor supporting member is small. There was a problem that we could not provide many possible patterns.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the outer rotor type motor according to the present invention has a rotor support member formed in a spherical shape, and the rotation axis is fixed to the center of the sphere and the rotor is fixed to the inner peripheral surface of the sphere. It is configured to do.

[0005]

[Work]

 In the structure described above, since the rotor support member is spherical, the surface area can be increased even with the same diameter as compared with the conventional motor, so that many display patterns can be provided.

[0006]

【Example】

 FIG. 1 is a cross-sectional view of an embodiment of an outer rotor type motor according to the present invention, in which a stator winding 1 is fixed to a stator support member 6 and a stator winding 2 is provided on the outer peripheral surface of the stator iron core 1. The structure in which the rotor 3 is rotatably supported via the air gap is the same as that of the prior art, but the first rotor formed into a hemisphere that connects the rotor 3 and the rotation shaft 5 together. Each of the rotors includes a support member 8 and another second rotor support member 9 which is substantially the same hemispherical as the rotor support member 8 and has a hole through which the stator support member 6 can penetrate at the center of its bottom. The open ends of the support members are joined together, the rotor 3 is secured inside the joined portion, and the stator support member 6 penetrates the second rotor support member 9 and is projected to the outside. The rotor shaft 5 supported by the bearing 7 provided on the stator support member 6 is fixed to the center of the bottom portion of the first rotor support member 8. That. The outer rotor type motor is not specified as to its power source, alternating current or direct current, and the motor type can be an appropriate motor such as an induction motor, a synchronous motor, a stepping motor, or a brushless motor. Needless to say.

In the configuration of the present invention shown in FIG. 1, when the radius of the sphere formed by the hemispherical rotor supporting members 8 and 9 is R, the surface area of the sphere is 4πR ^2. On the other hand, the rotor support member 4 of the conventional outer rotor type motor shown in FIG. 2 has a substantially cylindrical shape, and the surface of the cylindrical portion can be provided with a display pattern. If there is a radius of the cylinder and the length in the axial direction is R, the surface area of the cylinder can be expressed as 2πR ² , so that the surface area of the rotor support member of the outer rotor type motor according to the present invention is the same as the conventional surface area. The surface area is about twice that of the technology, and the area where the display pattern can be provided is about twice.

Further, in the embodiment shown in FIG. 1, the second rotor support member 9 is not provided, and it is possible to configure the first rotor support member 8 fixed to the rotary shaft 5 only.

[0009]

The outer rotor type motor according to the present invention is constructed as described above. Since the surface area of the rotor support member can be approximately doubled as compared with a conventional motor having the same outer diameter size, many patterns can be displayed on the rotor support member, so that a small-sized display device can be realized. effective.

[Brief description of drawings]

FIG. 1 is a sectional view of an outer rotor type motor according to the present invention.

FIG. 2 is a sectional view of an outer rotor type motor according to a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator iron core 2 Stator winding 3 Rotor 4 Conventional rotor support member 5 Rotating shaft 6 Stator support member 7 Bearing 8 First rotor support member 9 of the present invention Second rotation of the present invention Child support member

Claims (4)

[Scope of utility model registration request] 1. An outer rotor type motor comprising a stator and a rotor rotatably supported on the outer periphery of the stator via a gap, wherein the rotor support member connects the rotor and the rotary shaft. Is formed in a hemispherical shape having a diameter substantially equal to the diameter of the rotor, and a rotating shaft is fitted to the center of the bottom of the hemispherical rotor supporting member, and the rotor is attached to the open end of the hemispherical rotor supporting member. An outer rotor type motor characterized by being fixed. 2. A first hemispherical rotor supporting member having a fixed rotating shaft, and a hole having a shape substantially the same as that of the first hemispherical rotor supporting member and penetrating the supporting member of the rotating shaft at the center of the bottom. The second hemispherical rotor supporting member is arranged to face each other, and the rotor is fixed to the contact portions of the respective open ends, and the utility model registration claim 1 according to claim 1. Outer rotor type motor. 3. A rotation axis perpendicular to a plane passing through the center of a sphere of two or more spherical supporting members having arbitrary joints, and having an axial thickness about the plane passing through the center of the sphere. An outer rotor type motor characterized in that an annular rotor is fixed to a rotary shaft by the spherical support member, and a stator is arranged with an inner peripheral surface of the annular rotor via a gap. 4. An outer rotor type motor, wherein a joint portion of the hemispherical support member with the outer diameter of the rotor is a cylindrical portion concentric with the rotation shaft.