JPS62126847A - Rotary electric machine - Google Patents

Abstract

PURPOSE:To prevent the adhesive from dripping into the yoke when the magnet fixing work is carried out by impregnating the adhesive in the fixing members to insert in between magnets and by fixing the magnets to the inside circumference of yoke by the use of this fixing members. CONSTITUTION:When a tentatively magnetized magnet 2 is magnetized, the magnet 2 is positioned on the inside circumference of a yoke 1, where it is temporarily fixed. Then, fixing members of stick felt, sponge, etc. impregnated with an adhesive inside is inserted in between the magnets 2 and 2. After that, the entire yoke 1 is heated and dried, to the inside circumferential surface of which the outside circumferential surface 3a of the fixing members 3 are stuck. Both end faces 3b of the fixing members 3 are stuck to an end face 2a of the opposing magnet 2. Through this fixing members 3 the magnet 2 and the yoke 1 are fixed between. Thus, the adhesive can be impregnated in the fixing members even if it is large in quantity, so that the adhesive can be prevented from dripping inside the yoke 1.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a magnet fixing structure in a rotating electrical machine.

[Conventional technology]

In conventional magnets, the magnet is fixed to the inner circumferential surface of the yoke by applying adhesive to the back surface (outer circumferential surface) of the magnet or by dropping adhesive between the yoke and the magnet.

[Problem that the invention seeks to solve]

However, in the conventional device described above, if the amount of adhesive inserted between the yoke and the magnet is small, the fixing strength between the yoke and the magnet will be reduced, and the magnet will peel off from the yoke. There is a need to add a large amount of. Therefore, if a large amount of adhesive is used, on the other hand, the adhesive will drip from between the magnet and the yoke, and there is a problem that the dripped portion of the adhesive must be removed from the yoke.

Therefore, as mentioned above, a problem arises in that it is very difficult to control the amount of adhesive.

[Failure to solve the problem]

Therefore, the present invention has a configuration including a cylindrical yoke, a plurality of magnets provided on the inner periphery of the yoke, and a fixing member inserted between these magnets and impregnated with an adhesive, and the fixing member includes: The rotating electrical machine is characterized in that the member is fixed to the inner periphery of the yoke and the side surface of the magnet using the adhesive, thereby fixing the magnet within the yoke.

(Example〕 The present invention will be described below with reference to embodiments shown in the drawings.

In FIG. 1, 1 is a cylindrical yoke, 2 is four arc-shaped magnets, and 3 is a rod-shaped felt serving as a fixing member.

The felt 3 is impregnated with an adhesive.

Further, the width of the felt 3 is slightly smaller than the width of the magnet 2.

As for the assembly method, the magnet 2 is first temporarily magnetized, and then the magnet 2 is magnetized, and then the magnet 2 is positioned and fixed on the inner circumference of the yoke 1. Next, a rod-shaped felt 3 impregnated with adhesive is inserted into the space between the magnets 2. At this time, the rod-shaped felt 3 has its outer circumferential surface 3 a in contact with the inner circumference of the yoke 1 and its side surface 3 b in contact with the end surface 2 a of the magnet 2 . Then, by heating and drying the entire yoke 1,
Glue the outer peripheral surface 3a of the felt 3 to the inner peripheral surface of the yoke l,
and the end surface 2 of the magnet 2 facing both end surfaces 3b of the felt 3
As a result, the magnet 2 is attached through the felt 3.
and the yoke L are fixed.

As mentioned above, since the felt 3 inserted between the magnets 2 is used to fix the magnet 2 and the yoke 1, even if there is a large amount of adhesive, it can be impregnated into the felt 3. This can prevent adhesive from dripping into the yoke l. In other words, the amount of adhesive impregnated into the felt 3 can be easily controlled.

In addition, in the second embodiment shown in FIG.
The felt 3 has a U-shape, and consists of a plane part 3a that comes into contact with the inner periphery of the yoke l, and a pair of side parts 3b that come into contact with the end face 2a of the magnet 2.

Then, a U-shaped plate spring 4 is inserted into the inner circumference of the felt 3, and the spring force of the temporary spring 4 is applied to the side surface 3b of the felt 3.
(2) The end face 2a of the stone 2 is pressed through.

Therefore, the force for fixing the magnet 2 to the yoke 1 can be made strong by the felt 3 containing the adhesive and the spring force of the leaf spring 4.

Furthermore, if a highly viscous adhesive is used, a large amount of the adhesive can be impregnated into the felt 3.

Instead of the felt 3, any material that can be impregnated with adhesive may be used, such as sponge.

The felt 3 may be impregnated with the adhesive by dropping it after the felt 3 is inserted between the magnets 2.

〔Effect of the invention〕

As described above, in the present invention, the yoke and the magnet are fixed using the fixing member impregnated with adhesive. This has the excellent effect of preventing adhesive from dripping and making it easy to control the amount of adhesive.

[Brief explanation of drawings]

FIG. 1 is a front view showing a first embodiment of the rotating electrical machine of the present invention, and FIG. 2 is a front view showing a second embodiment of the rotating electrical machine of the present invention. 1... Yoke 52... Magnet, 2a... Side, 3...
・Felt that forms the fixing member.

Claims (1)

[Claims] A cylindrical yoke, a plurality of magnets provided on the inner periphery of the yoke, and a fixing member inserted between these magnets and impregnated with an adhesive, the fixing member being fixed by the adhesive, A rotating electrical machine, wherein the magnet is fixed within the yoke by being fixed to an inner circumference of the yoke and a side surface of the magnet.