JP3006788U - Porcelain - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a magnet that can reduce the cost and reduce the man-hours for attachment. A magnet 4 used for either one of a rotor 1 and a stator 2 of a motor 3, the circumferential surface of the magnet 4 facing toward the other rotor 1 side or stator 2 side is a cylinder. Surface and the longitudinal direction of the magnet 4 is the rotor 1 and the stator 2.
It is inclined with respect to the axis of.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a magnet. More specifically, it relates to a magnet for a motor used as a power source for industrial robots and machine tools.

[0002]

[Prior art]

 Generally, a motor is composed of a rotor and a stator. On the rotor side, for example, as shown in FIG. 3, a plurality of magnets 14 are arranged in two rows so as to be offset in the circumferential direction of the rotor 11. That is, the magnets 14 are arranged in a staggered pattern. With this arrangement, the cogging torque, which is one of the torque unevenness of the motor, is reduced.

[0003]

[Problems to be solved by the device]

 However, the arrangement of the magnets of the motor requires a large number of magnets, and thus the cost is likely to be high, and the number of man-hours for the sticking work is large, which is troublesome. In addition, there is also a problem in that a pitch error is likely to occur in each magnet in the pasting work.

In view of the above circumstances, an object of the present invention is to provide a magnet that can reduce the cost and the man-hours for attachment.

[0005]

[Means for Solving the Problems]

 The magnet of the present invention is a magnet used for either one of a rotor and a stator of a motor, and the surface of the magnet in the circumferential direction facing the rotor side or the stator side of the other is a cylindrical surface. In addition, the longitudinal direction of the magnet is inclined with respect to the axis of the rotor and the stator.

[0006]

According to the magnets of the present invention, for example, when the magnets are attached to the rotor, the conventional magnets can be arranged in one row, whereas the conventional magnets are arranged in two rows. As a result, the cost can be reduced and the number of man-hours for the sticking work can be eliminated.

[0007]

【Example】

 Hereinafter, the magnet of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is an explanatory view showing an embodiment in which the magnet of the present invention is used in a rotor of a motor, and FIG. 2 is a developed plan view of magnets arranged in the circumferential direction of the rotor in FIG.

As shown in FIGS. 1 and 2, in a motor 3 composed of a rotor 1 and a stator 2, six magnets 4 are attached to the rotor 1 in one row at equal intervals. . An adhesive can be used as a method of attaching. As a method other than sticking, in the case of a rotor, a method of winding tape around the outer diameter of the magnet can be used. Also, by using the adhesive and the tape together, the magnet can be firmly fixed to the rotating rotor.

The magnet 4 is a rectangular parallelepiped having a substantially parallelogram shape, and an inner surface 4 a and an outer surface 4 b thereof are each formed in a cylindrical surface in the circumferential direction. The longitudinal direction of the magnet 4 is arranged so as to be inclined (skew) with respect to the axis of the rotor 1. Further, both end surfaces and both side surfaces of the magnet 4 are generally parallel to each other so that they can be easily manufactured by a mold. However, the present invention is not limited to being parallel, and it is difficult to manufacture them by a mold. There may be no angle.

The stator 2 is composed of a cylindrical shell 5 and a coil 7 wound around a plurality of protrusions 6 formed inside the shell 5. The inner surface 8 of the protrusion 6 is a cylindrical surface like the outer surface 4b of the magnet 4. A predetermined gap 9 of about 0.5 mm is usually formed between the protrusion 6 and the magnet 4. Therefore, in the motor 3, when an alternating current is applied to the coil 7, an electromagnetic force is generated between the motor 3 and the magnet 4, and the rotor 1 can be smoothly rotated.

Although six magnets are used as the number of magnets 4 in the present embodiment, the number of magnets is not limited to six in the present invention, and may be appropriately selected according to the number of poles (even number). Further, as the material of the magnet 4, ferrite, rare earth magnet, or the like can be used.

In this embodiment, the magnet 4 is arranged on the rotor 1 side and the coil 7 is wound on the stator 2 side. However, in the present invention, the magnet is arranged on the stator side and the coil Can be wound around the rotor side.

[0014]

[Effect of device]

 As described above, according to the magnet of the present invention, the number of magnets can be reduced to half or more as compared with the conventional magnet used in the motor including the rotor and the stator. Therefore, the cost can be reduced. Further, since the man-hours for attaching the magnet can be reduced, workability can be improved.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment in which the magnet of the present invention is used in a rotor of a motor.

FIG. 2 is a developed plan view of magnets arranged in the circumferential direction of the rotor in FIG.

FIG. 3 is a developed plan view of a conventional magnet used for a rotor of a motor.

[Explanation of symbols]

 1 rotor 2 stator 3 motor 4 magnet

Claims (1)

[Scope of utility model registration request] 1. A magnet used for either one of a rotor and a stator of a motor, the circumferential surface of the magnet facing the rotor side or stator side of the other being a cylindrical surface, and A magnet in which the longitudinal direction of the magnet is inclined with respect to the axis of the rotor and the stator.