JPS63129834A - Permanent-magnet rotor - Google Patents

Abstract

PURPOSE:To easily position permanent magnets, by arranging V-shaped recessed sections, near the center of the axis-directional end surface of a plurality of the permanent magnets arranged on the outer peripheral surface of a rotary shaft or a yoke fitted firmly on the rotary shaft. CONSTITUTION:Near the center of both the sides of the axis-directional end surface of permanent magnets 2, V-shaped recessed sections 9 are formed. A circumferentce-directional positioning jig 10 is provided with projecting sections 11 which are arranged in the same quantity as that of the permanent magnets and are fitted on the shapes of the V-shaped recessed sections 9. When the permanent magnets 2 are positioned on a rotary shaft 1, then the jig 10 is fixed on the rotary shaft 1 first, and the V-shaped recessed sections 9 of the permanent magnets 2 are fitted on the projecting sections 11 of the jig 10, and after that, the permanent magnets 2 are firmly fitted with bonding agent 3. As a result, on the outer peripheral surface of the rotary shaft 1, a plurality of the permanent magnets 2 can be arranged and firmly fitted easily and uniformly in the circumferential direction.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a rotor for a permanent magnet rotating machine using permanent magnets in the rotor.

Conventional technology In recent years, permanent magnet rotating machines have a constant rotational speed due to their rotation principle, and this feature has been used for many applications.Especially for small motors, the structure is simple, and it is often used as a control motor. It has become widely used as

A rotor of a permanent magnet rotating machine is generally formed by dividing a plurality of permanent magnets into circumferentially arranged parts on the outer peripheral surface of a rotating shaft or a yoke and fixing them with an adhesive.

An example of the conventional permanent magnet rotor mentioned above will be described below with reference to the drawings.

FIG. 4 shows the overall appearance of a conventional permanent magnet rotor. In FIG. 4, 1 is a rotating shaft (or a yoke fixed to the rotating shaft). 2 is a plurality of permanent magnets arranged on the outer peripheral surface of the rotating shaft 1; 3 is an adhesive for fixing the permanent magnets 2 to the outer peripheral surface of the rotating shaft 1;

FIG. 5 shows a side view of a conventional permanent magnet rotor. In Fig. 5, 4 is a permanent magnet 2 on the outer peripheral surface of the rotating shaft 1.
is the center line on which to place. 5 is a magnet gap of the permanent magnet 2, and 6 is a magnet 11 of the permanent magnet 2. Figure 6 shows
A side view of a permanent magnet rotor is shown in which a plurality of permanent magnets 2 are positioned on a rotating shaft 1 using a jig in order to arrange them at fixed positions on the circumference. In Fig. 6, 7 is a positioning jig, and 8
is the dimension of the positioning jig 11.

The operation of the permanent magnet rotor configured as described above will be explained below.

In general, a permanent magnet rotor is formed by fixing a plurality of permanent magnets 2 to the outer peripheral surface of a rotating shaft 1 with an adhesive 3, as shown in FIG. 4, but as shown in FIG. In view of the performance of the rotating machine, it is best to arrange the center lines 4 on the circumference of the rotating machine equally. For this purpose, after positioning is performed using the magnet center 6 of the permanent magnet 2 and the jig width dimension 8 of the positioning jig 7 as shown in FIG. 6, which is calculated from the outer diameter of the rotating shaft 1,
It was fixed with adhesive 3.

Problems to be Solved by the Invention However, in the above configuration, generally the permanent magnet 2
The size of the magnet medium 6 varies due to its manufacturing method, and a gap is created between the magnet gap 5 and the positioning jig 7.
It becomes difficult to arrange the plurality of permanent magnets 2 evenly on the circumference of the rotating shaft 1.

As a result, there have been problems in that the performance as a rotating machine is significantly degraded, such as uneven rotation and large vibrations.

In view of the above-mentioned problems, the present invention provides a permanent magnet rotor that allows easy positioning of permanent magnets, is inexpensive, and has good quality.

Means for Solving the Problems In order to solve the above problems, the permanent magnet rotor of the present invention has a plurality of permanent magnets arranged around the outer circumferential surface of the rotating shaft or the yoke fixed to the rotating shaft. A V-shaped recess is provided near the center of the axial end face of the permanent magnet.

Effect of the present invention With the above-described configuration, when a plurality of permanent magnets are positioned equally in the circumferential direction on the outer circumferential surface of the rotating shaft, the V-shaped recesses provided on the axial end surfaces of each side of the permanent magnets are , by protecting the circumferential positioning jig or the axial end face of the permanent magnet, or by arranging a protrusion that matches the V-shaped recess on the axial positioning end plate, the recess and the By aligning the protrusions, a plurality of permanent magnets can be arranged equally around the outer peripheral surface of the rotating shaft without being affected by dimensional variations between individual permanent magnets due to the manufacturing method of the permanent magnets.

EXAMPLE Hereinafter, a permanent magnet rotor according to an example of the present invention will be described with reference to the drawings.

FIG. 1 shows the appearance of a permanent magnet rotor according to the present invention. In Figure 1, ■ is the rotation axis, 2 is the rotation axis 1
A permanent magnet 9 is fixed to the outer periphery of the permanent magnet 2 with an adhesive 3, and 9 is a V disposed near the center of the axial end face of the plurality of permanent magnets 2.
It is a letter-shaped recess.

FIG. 2 shows a side view of FIG. 1. In FIG. 3, 10 is a circumferential positioning jig for positioning the permanent magnet 2 equally on the circumference of the outer peripheral surface of the rotating shaft 1, and 11 is a jig that is shaped like the V-shaped recess 9 of the permanent magnet 2. It is a protrusion that matches the

The operation of the permanent magnet rotor constructed as described above will be explained below with reference to FIGS. 1, 2, and 3.

First, FIG. 3 shows the relationship between the V-shaped recess 9 on the axial end surface of the permanent magnet 2, the circumferential positioning jig 10 and the protrusion 11 that are made to match the shape. A V-shaped recess 9 is provided near the center on both sides of the axial end surface,
On the other hand, the circumferential positioning jig 10 is provided with protrusions 11 in the same number as the permanent magnets 2 and in a shape that matches the shape of the V-shaped recess 9.

That is, when positioning the permanent magnets 2 on the rotating shaft 1, first fix the circumferential positioning jig 10 to the rotating shaft 1, align the plurality of permanent magnets 2 to the outer diameter of the rotating shaft 1, and adjust the circumferential direction. The permanent magnet 2 is attached to the projection 11 of the direction positioning jig 10.
After aligning the V-shaped recesses 9, they are fixed with adhesive 3.

As described above, according to this embodiment, by providing the V-shaped recess 9 on the axial end face of each of the plurality of permanent magnets, rotation is prevented regardless of dimensional variations in the magnets due to the manufacturing method of the permanent magnets. A plurality of permanent magnets 2 can be arranged and fixed to the outer peripheral surface of the shaft 1 equally in the circumferential direction.

Further, in this embodiment, the shape of the recessed portion of the permanent magnet 2 is approximately V-shaped, but it may also be approximately semicircular (Although the recessed portion is provided on both end faces, it is also possible to form it on one side.

Effects of the Invention As described above, the present invention has a plurality of permanent magnets arranged equally divided in the circumferential direction on the outer peripheral surface of a rotating shaft or a yoke fixed to the rotating shaft. By deploying a plurality of permanent magnets, a plurality of permanent magnets can be equally distributed in the circumferential direction of the outer circumferential surface of the rotating shaft, and a rotor for a permanent magnet rotating machine with less uneven rotation and less vibration can be provided. .

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a permanent magnet rotor according to an embodiment of the present invention, FIG. 2 is a side view of the rotor of FIG. 1, FIG. 3 is a diagram showing the positioning part of the permanent magnet, The figure is a perspective view of a conventional permanent magnet rotor, Figure 5 is a side view of Figure 4, and Figure 6 is a side view of Figure 4.
The figure is a diagram showing permanent magnet positioning of a conventional permanent magnet rotor. 1...Rotating shaft, 2...Permanent magnet, 9.
...V-shaped recess. 1-Rotating axis 1st Figure 2-”
-Recess of vacancy stone 9-V construction 4x Fig. 2/. Figure 3 Figure 5 Figure 6

Claims (2)

[Claims] (1) In a permanent magnet rotor in which a plurality of permanent magnets are divided and arranged in the circumferential direction on the outer peripheral surface of a rotating shaft or a yoke fixed to the rotating shaft, an axial end surface of the plurality of permanent magnets. A permanent magnet rotor with a recess for positioning. (2) A permanent magnet rotor according to claim 1, wherein the recess is provided near the center of the end face.