JP2743190B2 - Method and apparatus for assembling a small motor - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method and an apparatus for assembling a small motor for magnetizing a magnet material and incorporating the magnet into a magnetic case of a small motor.

(Summary of the Invention) The present invention provides a small motor assembling method and apparatus for assembling a small motor using a permanent magnet, by devising a configuration of a guide member for guiding the permanent magnet in the direction of the magnetic material case of the small motor. In addition, the permanent magnet can be efficiently incorporated in a magnetic case of a small motor.

(Problems to be Solved by the Prior Art and the Invention) Conventionally, in the assembly of a small motor, a partially cylindrical permanent magnet is magnetized with a magnetizing device to form a partially cylindrical permanent magnet, and then the magnet is partially assembled. Has manually incorporated the permanent magnet into a magnetic case of a small motor in a completely different process.

For this reason, it was necessary to deliver the permanent magnets obtained in the magnetizing process to the process of assembling them into the magnetic case, and the assembling work into the magnetic case relied entirely on manual work. But there were also bad problems.

In view of the above, the present invention makes it possible to continuously and automatically execute a process of magnetizing a permanent magnet and a process of incorporating a permanent magnet into a magnetic body case, thereby improving work efficiency and rationalizing a manufacturing process. It is an object of the present invention to provide a method and apparatus for assembling a small motor.

(Means for Solving the Problems) In order to achieve the above object, a method for assembling a small motor according to the present invention comprises disposing a magnetic guide member between magnetizing magnetic poles, and providing a non-magnetic guide at a tip end of the magnetic guide member. Connect the members,
A magnetic case of a small motor is arranged so as to face the non-magnetic guide member, and a permanent magnet after magnetizing the magnet material body is advanced in the direction of the non-magnetic guide member along the magnetic guide member. Permanent magnets located on the member are attracted and arranged in the magnetic case using the same repulsion of the adjacent permanent magnets with respect to the magnetic poles.

Further, the small motor assembly apparatus of the present invention includes a magnetizing device having a pair of magnetizing magnetic poles, a magnetic guide member disposed between the magnetizing magnetic poles and serving as a guide for transferring a permanent magnet, A non-magnetic guide member connected and integrated with the tip of the guide member is provided.

(Operation) In the present invention, the permanent magnet after magnetizing the magnet material by passing between the magnetizing magnetic poles is attracted to the magnetic guide member by using the magnetic force while being applied along the non-magnetic guide. It can be advanced in the direction of the member. When the permanent magnet reaches the non-magnetic guide member, the attracting action to the guide member by the magnetic force is lost, the same repulsion action between the magnetic poles of adjacent permanent magnets works effectively, and the permanent magnet at the tip is separated from the subsequent one. Then, it jumps into the magnetic case of the small motor and adheres. As a result, the permanent magnet can be automatically magnetized and assembled into the magnetic case in one step.

(Embodiment) Hereinafter, embodiments of a small motor assembling method and apparatus according to the present invention will be described with reference to the drawings.

1 to 4, reference numeral 1 denotes a pair of magnetizing magnetic poles 2.
A, 2B magnetizing device, 3A is a magnetic guide rod traversing the intermediate position of the magnetizing magnetic poles 2A, 2B, 3B is the magnetic guide rod 3A
The non-magnetic guide rod 4 integrated with the tip of the non-magnetic guide rod 4 is a magnetic case (usually also used as a motor yoke) for a small motor arranged so that the inner peripheral surface is opposed to the outer peripheral surface of the non-magnetic guide rod 3B. . The guide rods 3A and 3B integrally constitute a linear guide member. The material of the magnetic guide rod 3A is iron or the like, and the material of the non-magnetic guide rod 3B is brass, a non-magnetic metal of copper, resin, ceramic or the like.

As shown in FIG. 2, the magnetizing device 1 has a yoke 11, a female screw member 12 is fixed to both ends of the yoke 11, and a male screw member 13 is screwed to the female screw member 12, respectively. ing.
Here, both the yoke 11, the members 12, and 13 are made of a magnetic material such as iron having a large saturation magnetic flux density. At the tip of the male screw member 13, a high performance Nd-Fe-B magnetizing permanent magnet with a large energy product
14 are fixed, and the opposing surfaces of both magnetizing permanent magnets 14 are a pair of magnetizing magnetic poles 2A and 2B, respectively. A handle 15 is fixed to each male screw member 13, and the handle 15
By rotating the 15, the distance between the opposing end faces of the magnetizing permanent magnet 14 can be variably adjusted.

Reference numeral 16 denotes an auxiliary guide for feeding the magnet material body 20 before magnetization along the guide member 3A.

In the configuration of the above embodiment, as shown in FIGS. 1 and 3, a pair of partially cylindrical magnet material members 20 to be permanent magnets to be incorporated in the magnetic case 4 of the small motor sandwich the magnetic guide rod 3A. As shown by the arrow X, the magnetic flux is fed between the pair of magnetizing magnetic poles 2A and 2B along the outer periphery of the magnetic guide rod 3A in the mutual positional relationship as described above, and is magnetized by the strong magnetic flux between the magnetizing permanent magnets 14A. As a result, the magnetic guide rod 3A is transported forward while being attracted to the outer peripheral surface of the magnetic guide rod 3A by magnetic force. This forward transfer is performed, for example, by sequentially feeding the permanent magnets 20A and mechanically pushing out the front permanent magnets. Here, in the case of the magnetic guide rod 3A, the attraction force to the magnetic guide member 3A is more dominant than the repulsive force of the magnetic poles appearing on the front and rear end faces of the adjacent permanent magnets 20A, and each permanent magnet is Advance closely together along 3A.

As shown in FIG. 4, the top permanent magnet 20A is a magnetic guide rod 3A.
When it reaches the non-magnetic guide rod 3B connected to the tip of the magnet, there is no adsorption to the guide rod by magnetic force, and the repulsive force between the same poles on the front and rear end faces of adjacent permanent magnets becomes dominant,
4. The permanent magnet 20A is turned into the magnetic case 4 by the force in the direction of arrow F in FIG.
, And is automatically attracted to the inner peripheral surface of the magnetic case 4 by magnetic force as shown by the imaginary line in FIG.

This allows the inner peripheral surface to simultaneously magnetize the S-pole permanent magnet and the N-pole permanent magnet, separate the first one from the other, and automatically incorporate it into the magnetic case. At this time, an adhesive is applied to the magnetic material case 4 in advance,
By applying an adhesive after the permanent magnet 20A is attracted to the inside of the magnetic material case, the permanent magnet
20A can be securely fixed.

Also, the magnetizing device 1 has a large energy product of Nd-Fe-B.
Since the system permanent magnet is used as the magnetizing permanent magnet 14, no power source is required, no heat is generated, and the apparatus configuration is simple and inexpensive.

Furthermore, since the facing distance of the magnetizing permanent magnets 14 can be variably adjusted, by changing the cross-sectional area and cross-sectional shape of the guide rods 3A and 3B, it is possible to cope with magnet materials having various shapes and thicknesses, It is also useful as a measure.

The guide rod may have a hollow structure, and the present invention is applicable even if the magnet material has a shape other than the partial cylindrical shape shown in FIG.

(Effect of the Invention) As described above, according to the present invention, the magnetized permanent magnet is advanced toward the non-magnetic guide member along the magnetic guide member, and the permanent magnet is placed on the non-magnetic guide member. By utilizing the same repulsion between the magnetic poles of adjacent permanent magnets that become dominant when they arrive, the permanent magnets can be arranged to jump inside the magnetic case of the small motor. As a result, the permanent magnets can be automatically magnetized and incorporated into the magnetic case in one step, and the working efficiency can be greatly improved. Moreover, a complicated mechanism for transferring, separating, and assembling the permanent magnet into the case is not required, and the apparatus can be configured simply and at low cost.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing an embodiment of a method and an apparatus for assembling a small motor according to the present invention, FIG. 2 is a side sectional view of a magnetizing device used in the embodiment, and FIG. FIG. 4 is a front sectional view of a main part for explaining the operation of the embodiment. 1 magnetizing device, 2A, 2B magnetizing magnetic pole, 3A magnetic guide rod, 3B non-magnetic guide rod, 4 magnetic case,
11 ... yoke, 12 ... female screw member, 13 ... male screw member,
14 ... permanent magnet for magnetization, 15 ... handle, 20 ... magnet material, 20A ... permanent magnet.

Claims (2)

(57) [Claims] 1. A magnetic guide member is disposed between magnetizing magnetic poles, a non-magnetic guide member is connected to a tip side of the magnetic guide member, and a magnetic case of a small motor is disposed to face the non-magnetic guide member. Then, the permanent magnet after magnetizing the magnet material body is advanced in the direction of the non-magnetic guide member along the magnetic guide member, and the permanent magnet located on the non-magnetic guide member is moved to the same position as the magnetic pole of the adjacent permanent magnet. A method for assembling a small motor, wherein the magnetic body case is attracted and disposed by utilizing pole repulsion. 2. A magnetizing device having a pair of magnetizing magnetic poles, a magnetic guide member disposed between the magnetizing magnetic poles and serving as a guide for transferring a permanent magnet, and connected to a tip of the magnetic guide member. A small motor assembly device comprising an integrated non-magnetic guide member.