JPH0226226Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement in the mounting structure of a field pole consisting of a plurality of permanent magnets in a printed motor.

[Conventional technology]

A printed motor has a disk-shaped printed rotor and a field pole made up of a plurality of permanent magnets arranged circumferentially, facing the printed motor in the axial direction. ,conventionally,
This field pole is fixed with adhesive onto the inner surface (flat surface) of a bracket that also serves as a yoke.

[Problems to be solved by the invention] As described above, the conventional printed motor has a structure in which the permanent magnet serving as the field pole is fixed on the inner surface of the flat bracket, and therefore has the following drawbacks. Ta.

In order to position a plurality of permanent magnets at predetermined positions on the inner surface of the bracket, it is necessary to use a jig for each one, which is troublesome and requires many jigs.

Since positioning using a jig is time-consuming, adhesives that harden at room temperature cannot be used, and a cumbersome process of curing in a heating oven is required using a thermosetting adhesive.

Furthermore, the field to which this type of printed motor is applied is equipment that takes full advantage of the motor's thin plate shape, so the motor is required to be as short as possible in the direction of the rotational axis, so-called light, thin, and short. Since there is a thickness in the direction of the rotational axis that has a strength of , it is necessary to solve them comprehensively.

The present invention improves the structure of the bracket so that the bracket itself has a field pole positioning function, eliminates the need for jigs during assembly, and allows the use of room temperature curing adhesive. Achieved a structure that not only greatly reduces assembly man-hours, but also allows the relative positions of the bracket and permanent magnet to be shared in the axial direction, achieving lightness, thinness, and smallness, which are the greatest characteristics of this type of printed motor. That is its purpose.

[Means for solving problems]

In order to achieve this objective, the present invention provides a hole in the side surface of the bracket for fixing the permanent magnet in the radial and circumferential directions, and also forms a ring-shaped groove in the outer side surface of the bracket. A ring-shaped yoke is fixed, and the plurality of permanent magnets are respectively fitted into the holes of the bracket and fixed on the yoke surface.

[Example of idea]

Examples of the present invention will be described below.

FIG. 1 is a side view showing an embodiment of a printed motor of the type in which permanent magnets are disposed only on one side of the printed rotor in the axial direction, and shows the upper half in cross section. 2 is a perspective view showing an exploded state of the load-side bracket in FIG. 1, and FIG. 3 is a perspective view showing an assembled state.

In FIGS. 1 to 3, reference numeral 1 denotes a load-side bracket, which is made of an aluminum alloy that is lightweight and has good heat conduction. Reference numeral 2 denotes an anti-load side bracket which faces the load side bracket 1 in the axial direction and is fitted and attached to each other at the outer periphery, and is made of an aluminum alloy like the bracket 1 described above. 3 attaches bearings 4 and 5 to these brackets 1 and 2.
The rotating shaft 6 is rotatably supported through the hub 7, a disk-shaped printed rotor with amateur coils (not shown) printed on both sides, and the hub 7.
It is fixed to the rotating shaft 3 via. Reference numeral 8 denotes a brush attached to the bracket 2 that directly contacts the armature coil conductor of the printed rotor 6 to supply power. Reference numeral 9 denotes a plurality of holes provided circumferentially in the bracket 1; reference numeral 10 denotes a groove formed at a radial position of the hole on the outer (load side) side surface of the bracket 1, the width of which is wider than the diameter of the hole; A hole is provided in this groove. 1
Reference numeral 1 denotes a load-side yoke fitted and attached to this groove 10, and 2 a field fixed to the surface of the yoke 11 with an adhesive that hardens at room temperature while being fitted into the hole 9 of the bracket 1. a plurality of permanent magnets as magnetic poles, 13 a yoke on the anti-load side fitted in a groove 14 formed on the inside (load side) of the bracket 2 at approximately the same radial position as the groove 10; is a power supply line that supplies power to the brush 8;
16 is a screw for attaching the yoke 11 to the bracket 1.

In such a configuration, the plurality of permanent magnets 12 as field poles are accurately positioned at predetermined positions when they are fitted into the holes 9 of the bracket 1 during assembly.

Therefore, positioning of the permanent magnets does not take much time, so it is possible to use an adhesive that hardens at room temperature.

Furthermore, since most of the height of the permanent magnet is buried inside the bracket 1, the dimension between the outer surfaces of both brackets 1 and 9 can be shortened.
Therefore, the axial dimension of the motor is shorter than that of the conventional motor.

Furthermore, since the brackets 1 and 9 are made of aluminum alloy and have good heat conduction, the heat loss generated in the printed rotor 6 is well dissipated to the outside through these brackets 1 and 9, and the cooling performance is improved. good.

In addition, in the present invention, as shown in FIG.
The same method can be applied to a type of printed motor in which the motor is disposed on both sides in the axial direction. In FIG. 4, the same reference numerals as in FIG. 1 indicate the same or corresponding parts.

The structure is different from the embodiment shown in FIG. 1 in that the yoke 13 is disposed outside the bracket 2, and the permanent magnet 17 is newly installed in the hole 18 provided in the bracket 2.
Since the configuration is the same except that it is attached to , the explanation will be omitted.

In addition, in the embodiments shown in FIGS. 1 and 4, the brackets 1 and 9 are made of aluminum alloy, which is lightweight and has good heat conduction, taking into consideration the weight of the motor and cooling. The material is not limited to aluminum alloy, and may be made of, for example, fine ceramic or FRP, or may be made of a magnetic material. However, the best example at present is the aluminum alloy shown in the first example, which is lightweight, has good heat conduction, and can be easily manufactured by die-casting or the like.

[Effect of idea]

In this way, the present invention provides a permanent magnet positioning function by providing holes for fitting permanent magnets in the bracket, and when the permanent magnets are fitted in these holes, a ring-shaped groove provided on the outer surface of the bracket is inserted into the bracket. Since the permanent magnet is fixed onto the ring-shaped yoke surface that is fitted and attached to the permanent magnet, the permanent magnet can be positioned extremely easily and accurately without the need for any jig when attaching the permanent magnet as the field pole. Also, since positioning can be done in a short time, it is possible to use adhesives that harden at room temperature.
Assembly man-hours can be significantly reduced.

Furthermore, since most of the height of the permanent magnet is buried inside the bracket, there is an effect that the axial dimension of the motor can be shortened.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of the present invention, showing the upper half in cross section. Fig. 2 is a perspective view showing an exploded state of the bracket part in Fig. 1, Fig. 3 is a perspective view showing an assembled state of the bracket part, and Fig. 4 is a view equivalent to Fig. 1 showing another embodiment of the present invention. It is. 1... Bracket (load side), 2... Bracket (counter-load side), 3... Rotating shaft, 4... Bearing (load side), 5... Bearing (counter-load side), 6... Printed rotor , 7...Hub, 8...Brush, 9...
Hole, 10...Groove, 11...Yoke (load side), 1
2... Permanent magnet, 13... Yoke (anti-load side),
14... Groove, 15... Power supply line, 16... Screw, 1
7... Permanent magnet, 18... Hole.

Claims (1)

[Claims for Utility Model Registration] 1. A disc-shaped printed rotor 6, and a plurality of printed rotors 6 facing in the axial direction of the rotating shaft 3 and disposed equicircumferentially from the rotating shaft 3. In a printed motor having a field pole 12 and brackets 1 and 2 that support the field pole 12, the brackets 1 and 2 are made of a non-magnetic material, and the positions of the plurality of permanent magnets 12 of the bracket 1 are A shallow ring-shaped groove 10 wider than the diameter of the hole 9 is formed on the outer side surface of the bracket 1 through each fixing hole 9, and a ring-shaped thin flat plate yoke 11 is fitted into the groove 10. and attach a plurality of permanent magnets 12 to the holes 9 of the bracket 1.
The bracket 2 on the opposite side of the printed rotor 6 has a ring-shaped thin flat plate yoke 13 facing the printed rotor 6. are fixed in the opened grooves 14, and the faces of the plurality of permanent magnets 12 and the ring-shaped thin flat plate yoke 13 facing the printed rotor 6 are almost the same as the inner side surfaces of the brackets 1 and 2. A printed motor characterized by being arranged on a surface. 2. The printed motor according to claim 1, wherein the brackets 1 and 2 are made of aluminum alloy. 3 A plurality of holes 18 are formed on the inner side surface of the yoke 13 facing the printed rotor 6 of the bracket 2, and a plurality of permanent magnets 17 are fitted and fixed thereinto, and a ring-shaped thin flat plate is formed on the outer side surface of the bracket 2. 2. A printed motor according to claim 1, wherein a yoke 13 is arranged and fixed.