JP4404194B2 - Magnet bonding jig - Google Patents

Description

  The present invention relates to a magnet bonding jig for evenly bonding and arranging magnets on a rotor of a motor.

A magnet bonding jig for evenly bonding and arranging magnets on the rotor core of an electric motor is already known (see, for example, Patent Document 1).
Japanese Utility Model Publication No. 6-70473

The holding jig described in Patent Document 1 is for enabling the magnet to be bonded to the rotor core of the electric motor at equal intervals. For this purpose, the magnet is bonded to the outer periphery of the rotor core. A holding jig is formed which is made of a nonmagnetic material having elasticity and is formed in a cylindrical shape and is formed with a plurality of locking protrusions protruding inward in the axial direction in accordance with the gap of the magnet so that the gaps of the magnet are made uniform.
However, this holding jig has a drawback in that it is difficult to align the magnets at regular intervals in the circumferential direction.

Further, as a magnet bonding jig that can easily perform this positioning, there have conventionally been those shown in FIG. 6 and FIG. In both figures, 1 is a yoke, 2 is a magnet, 3 is a base, 4 is an alignment jig, 5 is a magnet positioning jig, 6 is an adhesive, and 7 is a cushion. A plate, 8 is a take-out jig, and 9 is a pushing jig.
In such a jig, the magnet 2 to be attached is inserted between the yoke 1 and the magnet positioning jig 5 and bonded.

FIG. 8 is a diagram showing a procedure for magnet bonding using a conventional magnet bonding jig. In FIG. 8, first,
In (1), the yoke is placed on the base 3.
In (2), the positioning jig 4 is placed on the base 3, and the magnet positioning jig 5 is placed thereon.
In (3), the adhesive 6 is applied to the inner side of the magnet 2.
In (4), the N pole and S pole of the magnet 2 are alternately inserted into the magnet positioning jig 5 once.
In (5), the adhesive 6 is cured.
In (6), the cushion plate 7 is placed on the base 3, the take-out jig 6 is placed on the outside, the bonded magnet positioning jig 5 and the yoke 1 are taken out together, and placed on the take-out jig 6. The magnet 2 is bonded to the yoke 1 by placing the pushing jig 9 on the central portion of the yoke 1 and pushing it onto the cushion plate 7 to remove it.
As described above, in the conventional magnet bonding jig, the magnet positioning jig 5 is placed outside the yoke 1, the magnet 2 is inserted between the yoke 1 and the magnet positioning jig 5, and between the magnet insertion part and the magnet insertion part. The magnets are evenly arranged by the protrusions 5a.

However, such a magnet bonding jig has a long part that determines the interval between the magnets, so that a magnet cannot be inserted unless a large number of gaps are made, and in the case of a long magnet, Since the bonding jig becomes long, there is a drawback that the jig becomes large.
Furthermore, there is a problem that the magnet breaks when removing the magnet from the deviation of the center of gravity of the rotor, the deviation of the magnetic pole, and the magnet bonding jig.
And there existed a subject that it was not able to adhere | attach, arrange | positioning a magnet to a yoke equally equally. Therefore, there is a problem that a high-efficiency motor cannot be manufactured unless these problems are achieved.
Further, in the case of the magnetizing method after magnet bonding, the magnet before magnetization is not attracted to the yoke, so that there is a problem of pressurizing the magnet against the yoke.
Therefore, the present invention has been made in view of such problems, and is a compact that can be magnetized later by adhering magnetized magnets and also adhering non-magnetized magnets. An object of the present invention is to provide a simple magnet bonding jig.

In order to solve the above problem, the magnet bonding jig according to the first aspect of the present invention includes a cylindrical nonmagnetic ring having a space for concentrically arranging a yoke therein, and a periphery of the cylindrical nonmagnetic ring. A pair of pins that are inserted through the cylindrical nonmagnetic ring with a predetermined interval in the direction are paired at the three locations of the upper, middle, and lower portions in the axial direction of the cylindrical nonmagnetic ring over the entire circumference. And a screw hole provided in the cylindrical nonmagnetic ring on a substantially center line between the pair of pins, and a pressurizing screw screwed into the screw hole. It is characterized by that.
According to a second aspect of the present invention, in the magnet bonding jig according to the first aspect, the upper pin, the middle pin, and the lower pin are made of a non-magnetic material.
A third aspect of the present invention is the magnet bonding jig according to the first or second aspect, wherein the middle pin is closer to the upper pin side than the lower pin, and the lower pin is a magnet that allows easy removal of the magnet. It is located at the end.

  With the above configuration, according to the magnet bonding jig of the present invention, it is possible to mass-produce a rotor with a high center of gravity, with no magnet cracking, and with improved workability while equally arranging magnets on the rotor. It is possible to produce a low-power motor.

The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view of a magnet bonding jig of the present invention, FIG. 2 is a side sectional view thereof, and FIG. 3 is a top view thereof.
1-3, 100 is a magnet bonding jig according to the present invention, 1 is a yoke, 2 is a magnet, 3 is a base, 5 is a magnet positioning jig (cylindrical non-magnetic ring), 6 is an adhesive, 10 is an upper pin, 11 is a middle pin, 12 is a lower pin, 13 is a pressure screw, 14 is a magnet retainer, 15 is a yoke guide, 16 is a yoke guide fixing screw, 17 is a yoke fixing screw, and 18 is a yoke fixing screw. It has become.
As shown in the figure, in order to obtain a motor having a large number of magnets 2 disposed on the yoke 1 of the rotor, when the magnet 2 is bonded to the outer periphery of the yoke 1, three magnets are interposed between the magnet 2 and the adjacent magnet 2. The magnet bonding jig provided on the cylindrical non-magnetic ring is used so that the pin is positioned. In this magnet bonding jig, the upper pin 10 is a non-magnetic material, is located at the center of the yoke 1, and can be inserted evenly while being guided by the insertion opening of the magnet 2. 11 is closer to the upper pin 10 side than the lower pin. Since the inside of the magnet 2 is formed in a circular arc and the outer diameter of the yoke 1 is formed in a circle, this makes the magnet 2 easy to be vertical, thus preventing the magnet 2 from falling down and increasing accuracy, Since the middle pin 11 that determines the insertion direction in cooperation with the upper pin 10 is in the vicinity of the upper pin 10, the insertion direction is determined quickly, and by minimizing the height of the magnet positioning jig, it is easy to mount the magnet. Is lighter and smaller.
The lower pin 13 is located at the end of the magnet where the magnet 2 is easy to remove, and the upper pin 10 and the lower pin 11 determine the position of the magnet 2 at a long distance.
The center of the magnet 2 is pressed by the fixing screw 18, the thickness of the adhesive 6 is made constant by the pressure increase and decrease, and the magnet is evenly arranged from the center of the yoke 1.
By making the upper pin, middle pin, and lower pin with a non-magnetic material (for example, stainless steel), the iron powder does not adhere to the magnet and the magnet does not break or chip. Since it is not sucked, there is an advantage that workability is improved.

Next, the operation is shown in FIG.
In (1), first, the yoke guide 15 is placed on the base 3, and fixed with a yoke guide fixing screw 16.
In (2), the yoke 1 is mounted on the yoke guide 15, the yoke fixing member 17 is mounted thereon, and the yoke 1 is fixed to the yoke guide 15 via the yoke fixing member 17 with the yoke fixing screw 18.
In (3), the magnet positioning jig 5 to which the upper pin 10, the middle pin 11, the lower pin 12, and the pressure screw 13 are attached is concentrically covered on the outer periphery of the yoke 1 and attached on the base 3.
In (4), the adhesive 6 is applied to the magnet 2.
In (5), the magnet 2 with the adhesive 6 is inserted into the space between the coating magnet positioning jig 5 and the yoke 1. At this time, while the magnet 2 passes between the upper pins 10 and 10 juxtaposed in the circumferential direction, the magnet 2 reaches between the middle pins 11 juxtaposed in the circumferential direction, and passes through this, so that the direction of the magnet 2 Is decided. Furthermore, it enters between the lower pins 12 juxtaposed in the circumferential direction, the gap between the magnet 2 and the magnet 2 is determined, the pressure screw 13 is tightened, and the thickness of the adhesive 6 is adjusted (6). Is hardened, the cushion plate 7 is inserted into the central space of the take-out ring 8, and the magnet positioning jig 5 in step (5) is put on the cushion plate 7, the pressure screw 13 is loosened, and the yoke guide fixing screw 16 is placed. If you loosen the yoke 1 will fall by its own weight. Therefore, the yoke fixing screw 18 is removed, the yoke fixing member 17 is removed, and the rotor is completed. A rotor in which magnets are concentrically arranged on the yoke can be manufactured.

According to the present invention, magnetized magnets can be bonded in this way, but other magnets that are not magnetized can also be bonded in this way. It should be noted that the yoke to which the non-magnetized magnet is bonded may be magnetized using a magnetizing device as shown in FIG.
5A and 5B are diagrams showing a magnetizing apparatus that magnetizes a magnet. FIG. 5A is a longitudinal sectional view, and FIG. 5B is a transverse sectional view.
In the figure, reference numeral 50 denotes a magnetizing device, which includes an iron core 51 formed of a laminated body of silicon steel plates formed in a ring shape by forming a plurality of teeth 51a, and a magnetizing coil 52 wound around these teeth 51a, The magnetizing coil 52 comprises a magnetizing device power source 53 for energizing a direct current. Reference numeral 1 denotes a yoke having a non-magnetized magnet 2 bonded by a magnet bonding jig according to the present invention, and 54 denotes a shaft for fixing the yoke 1, and the yoke is fixed via a yoke fixing member 55 placed thereon. 1 is fixed by a fixing screw 56. After the yoke 1 with the unmagnetized magnet 2 bonded thereto is attached to the shaft 54 at the center of the magnetized coil 52, the shaft 54 is lowered and the magnetized coil 52 and the unmagnetized magnet 2 are positioned. Thereafter, the magnetizing device power supply 53 is turned on, the magnetizing coil 52 is energized, and the non-magnetized magnet 2 is magnetized. When the magnetization is finished, the shaft 54 is raised, the fixing screw 56 is pulled out, and the yoke 1 is taken out.
In this way, even a non-magnetized magnet can be bonded to the yoke using the magnet bonding jig of the present invention, and then magnetized using the magnetizing device of FIG. It is convenient because it is good.

  As described above, according to the magnet bonding jig of the present invention, a magnet is equally arranged on the rotor and workability is improved, and the rotor is mass-produced with high accuracy and no cracking of the magnet and with a good center of gravity. Therefore, there is an effect that a low-power motor can be manufactured.

It is a perspective view of a magnet adhesion jig showing an example of the present invention. It is a sectional side view of the magnet adhesion jig of FIG. It is a top view of the magnet adhesion jig of FIG. It is a figure which shows the operation | movement procedure of the magnet adhesion jig | tool of FIG. It is a figure which shows the magnetizing apparatus which magnetizes the magnet which is not magnetized, (a) is a longitudinal cross-sectional view, (b) is a cross-sectional view. It is a sectional side view of the conventional magnet adhesion jig. It is a top view of the magnet adhesion jig of FIG. It is a figure which shows the work procedure of the magnet adhesion jig | tool of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Yoke 2 Magnet 3 Base 4 Positioning 5 Magnet positioning jig 6 Adhesive 7 Cushion plate 8 Take-out ring 9 Push base 10 Upper pin 11 Middle pin 12 Lower pin 13 Pressure screw 14 Magnet presser 15 Yoke guide 16 Yoke guide fixing screw 17 Yoke fixing 1 Yoke fixing screw 50 Magnetizing device 51 Iron core 51a Teeth 52 Magnetizing coil 53 Magnetizing device power supply 54 Shaft 55 Yoke fixing member 56 Fixing screw 100 Magnet bonding jig

Claims (3)

  A cylindrical nonmagnetic ring having a space for concentrically arranging the yoke inside, and a pair of cylindrical nonmagnetic rings inserted through the cylindrical nonmagnetic ring at a predetermined interval in the circumferential direction of the cylindrical nonmagnetic ring A plurality of pins each consisting of an upper pin, a middle pin, and a lower pin, which are provided in pairs in the axial direction of the cylindrical non-magnetic ring over the entire circumference, the upper, middle, and lower portions. A magnet bonding jig comprising: a screw hole penetrating the cylindrical non-magnetic ring on a substantially center line between the pins; and a pressurizing screw screwed into the screw hole.   The magnet bonding jig according to claim 1, wherein the upper pin, the middle pin, and the lower pin are made of a non-magnetic material.   3. The magnet bonding treatment according to claim 1, wherein the middle pin is located closer to the upper pin side than the lower pin, and the lower pin is located at a magnet end where the magnet is easily removed. Ingredients.

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